CN111981627A - Liquid flow noise control method and device and air conditioning system - Google Patents
Liquid flow noise control method and device and air conditioning system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004378 air conditioning Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 title abstract description 29
- 238000012937 correction Methods 0.000 claims description 53
- 239000012530 fluid Substances 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- 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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a liquid flow noise control method and device and an air conditioning system. Wherein, the method comprises the following steps: acquiring the outdoor environment temperature; determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature; and if so, correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan so as to reduce the flow noise. According to the invention, bubbles can be avoided by setting a program algorithm, liquid flow noise is reduced, a hardware structure is not required to be additionally arranged in a pipeline, the equipment manufacturing procedures are reduced, and space is saved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling liquid flow noise and an air conditioning system.
Background
The air conditioning system mainly comprises four parts, namely a compressor, a condenser, a throttling device and an evaporator. Most throttling devices (such as electronic expansion valves) of the variable frequency compressor often generate intermittent and discontinuous liquid flow noise in the throttling, temperature-reducing and pressure-reducing processes in the heating stage, and the liquid flow noise is transmitted to the indoor side, so that troubles are caused to users. The liquid flow noise is generated because in the throttling process, part of liquid is converted into steam or gas in the process of liquid pressure change, so that the steam and the gas are mixed, small bubbles are formed after cavitation, the sound pressure is smaller and negative pressure occurs in the initial stage of free growth and the initial stage of collapse of the bubbles, the sound pressure of the noise is sharply increased in the final stage of collapse, and the magnitude order of the sound pressure can be up to more than 100 dB. Therefore, the noise generated when the bubble collapses is a main cause of the liquid flow noise. In order to solve the above-mentioned liquid flow noise, fig. 1 is a structural diagram of a conventional throttling device, and at present, a capillary structure is mainly arranged in front of and behind the throttling device to realize multi-stage throttling.
Aiming at the problems that in the prior art, the capillary tube is used for reducing liquid flow noise, the manufacturing process is complicated and the internal space of the equipment is occupied, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a liquid flow noise control method and device and an air conditioning system, and aims to solve the problems that in the prior art, liquid flow noise is reduced by using a capillary tube, the manufacturing process is complicated, and the internal space of equipment is occupied.
In order to solve the technical problem, the invention provides a method for controlling the flow noise, wherein the method comprises the following steps:
acquiring the outdoor environment temperature;
determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature;
and if so, correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan so as to reduce the flow noise.
Further, determining whether a compressor frequency needs to be corrected according to the outdoor ambient temperature includes:
judging whether the outdoor environment temperature is greater than or equal to a first preset value;
if yes, determining that the frequency of the compressor needs to be corrected;
if not, it is determined that no correction to the compressor frequency is required.
Further, the frequency of the compressor is corrected according to the upper limit value of the frequency of the compressor and the current gear of the inner fan, and the method comprises the following steps:
determining the current gear of the inner fan;
determining a correction coefficient of the frequency of the compressor according to the current gear of the inner fan; wherein the correction coefficient is inversely related to the gear of the inner fan;
calculating a compressor frequency target value according to the compressor frequency upper limit value and the correction coefficient;
adjusting the current compressor frequency to the frequency target value.
Furthermore, each inner fan gear has a corresponding correction coefficient; and the higher the gear of the inner fan is, the larger the correction coefficient is.
Further, when the frequency target value is calculated according to the upper limit value of the frequency of the compressor and the correction coefficient, the formula according to which:
the target frequency value is the compressor frequency upper limit value-correction coefficient x correction value.
Further, before determining whether a correction for the compressor frequency is required according to the outdoor ambient temperature, the method further comprises:
acquiring the indoor environment temperature;
determining whether to reduce the upper limit value of the frequency of the compressor or not according to the indoor environment temperature, and controlling the initial opening of the throttle valve; wherein the throttle valve is disposed between the evaporator and the condenser.
Further, determining whether to lower the upper limit value of the frequency of the compressor according to the indoor ambient temperature and controlling the initial opening of the throttle valve includes:
judging whether the indoor environment temperature is greater than or equal to a second preset value;
if yes, reducing the upper limit value of the frequency of the compressor, and controlling the initial opening of the throttle valve to be a first opening;
if not, keeping the upper limit value of the frequency of the compressor unchanged, and controlling the initial opening of the throttle valve to be a second opening; wherein the second opening degree is smaller than the first opening degree.
Further, reducing the upper limit value of the compressor frequency comprises:
determining the difference value between the indoor environment temperature and the second preset value;
determining a frequency reduction value according to the difference value; wherein the larger the difference, the larger the frequency reduction value;
and reducing the upper limit value of the frequency of the compressor according to the frequency reduction value.
The present invention also provides a fluid flow noise control device for implementing the fluid flow noise control method, the device comprising:
the outdoor temperature detection module is used for acquiring outdoor environment temperature;
the determining module is used for determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature;
and the correction module is used for correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan when the frequency of the compressor needs to be corrected so as to reduce the flow noise.
The invention also provides an air conditioning system which comprises the liquid flow noise control device.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described fluid flow noise control method.
By applying the technical scheme of the invention, the outdoor environment temperature is obtained; determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature; after the frequency of the compressor is determined to be required to be corrected, the frequency of the compressor is corrected according to the upper limit value of the frequency of the compressor and the current gear of the inner fan, so that the pressure drop before and after a throttling valve between an outdoor evaporator and a condenser in the heating process is reduced, bubbles can be avoided by setting a program algorithm, liquid flow noise is reduced, a hardware structure does not need to be additionally arranged in a pipeline, the manufacturing process of equipment is reduced, and the space is saved.
Drawings
FIG. 1 is a structural diagram of a conventional throttling device, in which a 1-throttle valve, a 2-capillary tube, and a 3-condenser are arranged;
FIG. 2 is a flow chart of a fluid flow noise control method according to an embodiment of the present invention;
FIG. 3 is a block diagram of a throttling device according to the application of the present invention, wherein, 1-throttle valve, 3-condenser;
FIG. 4 is a flow chart of a fluid flow noise control method according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a fluid flow noise control device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a liquid flow noise control device according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe preset values in embodiments of the present invention, these preset values should not be limited to these terms. These terms are only used to distinguish between different preset values. For example, the first preset value may also be referred to as a second preset value, and similarly, the second preset value may also be referred to as a first preset value without departing from the scope of the embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a liquid flow noise control method applied to an air conditioner, and fig. 2 is a flowchart of the liquid flow noise control method according to the embodiment of the invention, as shown in fig. 2, the method includes:
s101, acquiring the outdoor environment temperature.
In the application, the temperature data of the outdoor environment can be detected by the temperature sensor installed outdoors and then sent to the controller, and the controller executes corresponding operation according to the temperature of the outdoor environment.
And S102, determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature.
Since the load capacity of the air conditioning system is different and the frequency of the compressor is different at different outdoor temperatures, it is necessary to first obtain the outdoor ambient temperature in order to determine whether to correct the frequency of the compressor.
S103, if necessary, correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan.
The liquid flow noise in the air conditioning system is mainly caused by the fact that cavitation is generated to form bubbles and then collapse due to overlarge pressure difference between the front and the rear of the throttle valve. Therefore, the multi-stage throttling depressurization method is adopted to control the generation of bubbles. Specifically, after the compressor frequency is determined to need to be corrected, the compressor frequency is corrected according to the upper limit value of the compressor frequency and the current inner fan gear, the problem that bubbles are generated in fluid due to the fact that pressure before and after a throttle valve suddenly drops to saturation pressure and then the bubbles break off and generate noise is solved, the bubbles can be effectively avoided or reduced by gradually reducing the pressure for multiple times according to the current inner fan gear, fig. 3 is a structural diagram of a throttling device applying the throttling device, and as shown in fig. 3, a capillary tube is omitted between the throttle valve 1 and a condenser 3, and liquid flow noise is reduced through a program algorithm, and the capillary tube does not need to be arranged.
Acquiring outdoor environment temperature by the liquid flow noise control method of the embodiment; determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature; after the frequency of the compressor is determined to be required to be corrected, the frequency of the compressor is corrected according to the upper limit value of the frequency of the compressor and the current gear of the inner fan, so that the pressure drop before and after a throttling valve between an outdoor evaporator and a condenser in the heating process is reduced, bubbles can be avoided by setting a program algorithm, liquid flow noise is reduced, a hardware structure does not need to be additionally arranged in a pipeline, the manufacturing process of equipment is reduced, and the space is saved.
Example 2
In order to implement the method for controlling the noise of the liquid flow, which determines whether the frequency needs to be corrected according to the outdoor ambient temperature, the step S102 includes: judging whether the outdoor environment temperature is greater than or equal to a first preset value; if so, indicating that the current load of the system is higher, the frequency of the compressor is higher, the pressure difference between the front and the back of a throttle valve between the outdoor evaporator and the condenser is higher, and determining that the frequency of the compressor needs to be corrected; if not, the current load of the system is low, the frequency of the compressor is low, the pressure difference between the front and the back of the throttle valve between the outdoor evaporator and the condenser is normal, and the frequency of the compressor is determined not to need to be corrected. Wherein the first preset value is a value preset and stored in the system, and specifically, since the pressure difference between the front and the rear of the throttle valve between the outdoor evaporator and the condenser is related to the outdoor ambient temperature, the corresponding outdoor ambient temperature in the case that the pressure difference between the front and the rear exceeds a critical value, which would cause cavitation to generate bubbles, can be obtained in advance through experiments and set as the first preset value.
In a specific implementation process, in order to implement the step-down voltage according to the gear of the internal fan, the step S103 specifically includes: determining the current gear of the inner fan; determining a correction coefficient of the frequency of the compressor according to the current gear of the inner fan; calculating a compressor frequency target value according to the compressor frequency upper limit value and the correction coefficient; adjusting the current compressor frequency to the frequency target value.
In the embodiment, each internal fan gear has a corresponding correction coefficient; the higher the gear of the inner fan is, the larger the correction coefficient is, for example, the gear of the inner fan is determined first, and if the current gear of the inner fan is a first gear, the correction coefficient is determined to be a first value; if the current inner fan gear is a second gear, determining that the correction coefficient is a second value; if the current inner fan gear is a third gear, determining that the correction coefficient is a third value; wherein the first value < the second value < the third value. It should be noted that, since the setting manners of all the inner fan gears cannot be listed, in this embodiment, only the inner fan gear is taken as the third gear, but in other embodiments of the present invention, the gear of the fan may also be the fourth gear and the fifth gear, and correspondingly, the correction coefficient may be the fourth value and the fifth value, and the present invention is not limited specifically.
When the target value of the compressor frequency is calculated according to the upper limit value of the compressor frequency and the correction coefficient, the formula is as follows: the target compressor frequency value is the upper compressor frequency limit value-correction coefficient x correction value.
As can be seen from the above formula, the frequency correction is a decrease based on the upper limit value of the compressor frequency, and therefore the upper limit value of the compressor frequency needs to be determined before the frequency correction, and therefore, before determining whether the compressor frequency needs to be corrected according to the outdoor ambient temperature, the method further includes: acquiring the indoor environment temperature; determining whether to reduce the upper limit value of the frequency of the compressor or not according to the indoor environment temperature, and controlling the initial opening of the throttle valve; wherein the throttle valve is disposed between the evaporator and the condenser.
Specifically, whether the indoor environment temperature is greater than or equal to a second preset value is judged; if the temperature of the indoor air is higher, the system load is higher, the upper limit value of the frequency of the compressor needs to be reduced, and the initial opening of the throttle valve is controlled to be the first opening; if not, the indoor temperature is not too high, the upper limit value of the frequency of the compressor does not need to be reduced, so that the upper limit value of the frequency of the compressor is kept unchanged, and the initial opening of the throttle valve is controlled to be the second opening; wherein the second opening degree is smaller than the first opening degree. That is, when heating is performed at a high indoor temperature, the initial opening degree of the throttle valve needs to be increased. The second preset value is a value preset and stored in the system, and specifically, since the frequency of the compressor is related to the indoor ambient temperature, the corresponding indoor ambient temperature can be obtained in advance through experiments and set as the second preset value when the upper limit value of the frequency of the compressor exceeds the normal value.
In specific implementation, the step of reducing the upper limit value of the frequency of the compressor comprises the following steps: determining the difference value between the indoor environment temperature and the second preset value; determining a frequency reduction value according to the difference value; wherein the larger the difference, the larger the frequency reduction value; and reducing the upper limit value of the frequency of the compressor according to the frequency reduction value.
Example 3
This embodiment provides another fluid flow noise control method, and fig. 4 is a flowchart of a fluid flow noise control method according to another embodiment of the present invention, as shown in fig. 4, the method includes:
and S1, starting a heating mode.
S2, detecting the indoor environment temperature TInner partAnd judging the detected TInner partWith respect to the magnitude of the preset indoor ambient temperature T1, if TInner partWhen T is not less than T1, step S3 is executed, if T is not less than TInner part< T1, step S4 is executed.
S3, reducing the upper limit value F of the running frequency of the compressorUpper limit ofAnd simultaneously, the initial opening degree of the electronic expansion valve is controlled to be the first opening degree PH 1.
S4, keeping the current upper limit value F of the compressor running frequencyUpper limit ofAnd the initial opening degree of the electronic expansion valve is controlled to be the second opening degree PH2 at the same time. Wherein, PH2 is less than PH 1.
S5, detecting the outdoor environment temperature TOuter coverAnd determining TOuter coverThe magnitude relation with the preset outdoor environment temperature T2 if TOuter coverNot less than T2, step S6 is executed if TOuter cover< T2, step S7 is executed.
And S6, detecting the indoor wind gear value, and correcting the frequency of the compressor according to the indoor wind gear value.
If the gear of the inner fan is detected to be an ultra-strong gear, the running target frequency F of the compressor is determinedTarget＝FUpper limit of-K0 Δ F; if the high wind gear of the inner fan gear is detected, the running target frequency F of the compressorTarget＝FUpper limit of-K1 Δ F; if the gear of the inner fan is detected to be a middle gear, the running target frequency F of the compressor is determinedTarget＝FUpper limit of-K2 Δ F; if the gear of the inner fan is detected to be a low gear, the running target frequency F of the compressor is determinedTarget＝FUpper limit of-K3 Δ F; if the gear of the inner fan is detected to be a mute gear, the running target frequency of the compressor is determinedFTarget＝FUpper limit of-K4 Δ F. K0, K1, K2, K3 and K4 are correction coefficients corresponding to an indoor fan super-strong gear, a high gear, a middle gear, a low gear and a mute gear respectively, K0 is larger than K1 is larger than K2 is larger than K3 is smaller than K4, and delta F is a frequency correction value.
S7, the current compressor frequency is maintained and no correction is made.
And S8, exiting the frequency correction program.
Example 4
The present embodiment provides a fluid flow noise control apparatus for implementing the fluid flow noise control method, and fig. 5 is a schematic structural diagram of the fluid flow noise control apparatus according to the embodiment of the present invention, as shown in fig. 5, the apparatus includes:
the outdoor temperature detection module 10 is configured to obtain an outdoor ambient temperature, and in specific implementation, the function of the outdoor temperature detection module may be implemented by a temperature sensor installed outdoors. And a determining module 20, configured to determine whether a correction to the compressor frequency is required according to the outdoor ambient temperature. And the correcting module 30 is configured to correct the compressor frequency according to the upper limit value of the compressor frequency and the current inner fan gear when the compressor frequency needs to be corrected, so as to reduce the flow noise.
The liquid flow noise control device of the embodiment obtains the outdoor environment temperature through the outdoor temperature detection module; determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature through a determination module; after the fact that the frequency of the compressor needs to be corrected is determined, the frequency of the compressor is corrected through the correction module according to the upper limit value of the frequency of the compressor and the current gear of the inner fan, so that the pressure drop of a throttle valve between an outdoor evaporator and a condenser in the heating process is reduced, bubbles can be avoided through the virtual module, liquid flow noise is reduced, a hardware structure does not need to be additionally arranged in a pipeline, the manufacturing process of equipment is reduced, and the space is saved.
Example 5
In order to implement the determination of whether the frequency needs to be corrected according to the outdoor ambient temperature, as shown in fig. 6, the determining module 20 includes: a first judging unit 201, configured to judge whether an outdoor environment temperature is greater than or equal to a first preset value; a first determining unit 202, configured to determine that the frequency of the compressor needs to be corrected when the outdoor ambient temperature is greater than or equal to a first preset value; and a second determining unit 203 for determining that the compressor frequency does not need to be corrected when the outdoor ambient temperature is less than the first preset value.
In order to implement the step-down according to the gear of the internal fan, as shown in fig. 6, the correction module 30 includes: a gear determining unit 301, configured to determine a current inner fan gear; a coefficient determining unit 302, configured to determine a correction coefficient of the compressor frequency according to the current inner fan gear; wherein the correction coefficient is inversely related to the gear of the inner fan; a calculating unit 303, configured to calculate a compressor frequency target value according to the compressor frequency upper limit value and the correction coefficient, and an adjusting unit 304, configured to adjust the current compressor frequency to the frequency target value.
The coefficient determining unit 302 is specifically configured to: when the current inner fan gear is a first gear, determining that the correction coefficient is a first value; when the current inner fan gear is a second gear, determining the correction coefficient as a second value; when the current inner fan gear is a third gear, determining that the correction coefficient is a third value; wherein the first value < the second value < the third value.
When the coefficient determining unit 302 calculates the compressor frequency target value according to the compressor frequency upper limit value and the correction coefficient, the formula according to which: the target compressor frequency value is the upper compressor frequency limit value-correction coefficient x correction value.
As can be seen from the above formula, since the frequency correction is reduced based on the upper limit value of the compressor frequency, the upper limit value of the compressor frequency needs to be determined before the frequency correction, and therefore, the apparatus further includes:
an indoor temperature detection module 40 for acquiring an indoor ambient temperature; the indoor temperature detection module 40 may be implemented by a temperature sensor provided indoors.
The processing module 50 is used for determining whether to reduce the upper limit value of the frequency of the compressor according to the indoor environment temperature and controlling the initial opening of the throttle valve; wherein the throttle valve is disposed between the evaporator and the condenser.
Wherein, the processing module 50 includes: a second judging unit 501, configured to judge whether the indoor environment temperature is greater than or equal to a second preset value; a first processing unit 502 for reducing the upper limit value of the frequency of the compressor and controlling the initial opening of the throttle valve to a first opening when the indoor ambient temperature is greater than or equal to a second preset value; a second processing unit 503, configured to, when the indoor ambient temperature is less than a second preset value, keep the upper limit value of the frequency of the compressor unchanged, and control the initial opening of the throttle valve to be a second opening; wherein the second opening degree is smaller than the first opening degree. In a specific implementation, the first processing unit 502 is specifically configured to determine a difference between the indoor ambient temperature and the second preset value; determining a frequency reduction value according to the difference value; wherein the larger the difference, the larger the frequency reduction value; and reducing the upper limit value of the frequency of the compressor according to the frequency reduction value.
Example 6
The embodiment provides an air conditioning system, which comprises the liquid flow noise control device for controlling the liquid flow noise at the throttling valve between the outdoor heat exchanger and the condenser.
Example 7
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described fluid flow noise control method.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A method of fluid flow noise control, the method comprising:
acquiring the outdoor environment temperature;
determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature;
and if so, correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan so as to reduce the flow noise.
2. The method of claim 1, wherein determining whether a compressor frequency correction is needed based on the outdoor ambient temperature comprises:
judging whether the outdoor environment temperature is greater than or equal to a first preset value;
if yes, determining that the frequency of the compressor needs to be corrected;
if not, it is determined that no correction to the compressor frequency is required.
3. The method of claim 1, wherein modifying the compressor frequency based on the compressor frequency upper limit and the current inner fan gear comprises:
determining the current gear of the inner fan;
determining a correction coefficient of the frequency of the compressor according to the current gear of the inner fan; wherein the correction coefficient is inversely related to the gear of the inner fan;
calculating a frequency target value according to the upper limit value of the frequency of the compressor and the correction coefficient;
adjusting the current compressor frequency to the frequency target value.
4. The method of claim 3,
each inner fan gear has a corresponding correction coefficient; and the higher the gear of the inner fan is, the larger the correction coefficient is.
5. The method of claim 3, wherein the target frequency value is calculated based on the upper frequency limit of the compressor and the correction factor according to the following formula:
the target frequency value is the compressor frequency upper limit value-correction coefficient x correction value.
6. The method of claim 1, wherein prior to determining whether a correction to a compressor frequency is needed based on the outdoor ambient temperature, the method further comprises:
acquiring the indoor environment temperature;
determining whether to reduce the upper limit value of the frequency of the compressor or not according to the indoor environment temperature, and controlling the initial opening of the throttle valve; wherein the throttle valve is disposed between the evaporator and the condenser.
7. The method of claim 6, wherein determining whether to lower the compressor frequency upper limit value according to the indoor ambient temperature and controlling the initial opening of the throttle valve comprises:
judging whether the indoor environment temperature is greater than or equal to a second preset value;
if yes, reducing the upper limit value of the frequency of the compressor, and controlling the initial opening of the throttle valve to be a first opening;
if not, keeping the upper limit value of the frequency of the compressor unchanged, and controlling the initial opening of the throttle valve to be a second opening; wherein the second opening degree is smaller than the first opening degree.
8. The method of claim 7, wherein reducing the compressor frequency upper limit value comprises:
determining the difference value between the indoor environment temperature and the second preset value;
determining a frequency reduction value according to the difference value; wherein the larger the difference, the larger the frequency reduction value;
and reducing the upper limit value of the frequency of the compressor according to the frequency reduction value.
9. A fluid flow noise control apparatus for implementing the fluid flow noise control method according to any one of claims 1 to 8, the apparatus comprising:
the outdoor temperature detection module is used for acquiring outdoor environment temperature;
the determining module is used for determining whether the frequency of the compressor needs to be corrected or not according to the outdoor environment temperature;
and the correction module is used for correcting the frequency of the compressor according to the upper limit value of the frequency of the compressor and the current gear of the inner fan when the frequency of the compressor needs to be corrected so as to reduce the flow noise.
10. An air conditioning system comprising the fluid flow noise control device of claim 9.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a fluid flow noise control method according to any one of claims 1 to 8.
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