CN104697120A - VRV (Varied Refrigerant Volume) system and noise reduction control method thereof - Google Patents
VRV (Varied Refrigerant Volume) system and noise reduction control method thereof Download PDFInfo
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- CN104697120A CN104697120A CN201510131405.3A CN201510131405A CN104697120A CN 104697120 A CN104697120 A CN 104697120A CN 201510131405 A CN201510131405 A CN 201510131405A CN 104697120 A CN104697120 A CN 104697120A
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- Prior art keywords
- indoor set
- holding state
- degree
- expansion valve
- electric expansion
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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
- F24F11/83—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
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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
-
- 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
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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
- 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)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a noise reduction control method for a VRV (Varied Refrigerant Volume) system. The VRV system comprises an outdoor unit and a plurality of indoor units, wherein every indoor unit comprises an indoor heat exchanger and an electric expansion valve. The noise reduction control method comprises the following steps of obtaining the condensate depression of the indoor units which are in stand by states; controlling the opening of the electric expansion valves which are corresponding to the indoor units which are in the stand by states according to the condensate depression of the indoor units which are in the stand by states to reduce the noise of the indoor units which are in the stand by states. The VRV system can reduce the noise of the standby indoor units and improves the user experience during heating. The invention also discloses a VRF system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of method for noise reduction control of multiple on-line system and a kind of multiple on-line system.
Background technology
When multi-gang air-conditioner operates in heating mode, the electric expansion valve of the indoor set that part is not opened generally understands reserve part aperture, to prevent from stockpiling refrigerant and refrigeration oil in the heat exchanger of the indoor set do not opened, but also result in the indoor set do not opened has refrigerant to flow through simultaneously, general meeting to be flowed sound with refrigerant, can send the sound of neighing, form certain noise time serious, thus puzzlement can be caused to user, affect the use of user.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason, one object of the present invention is the method for noise reduction control proposing a kind of multiple on-line system, can reduce the noise of standby indoor set, improve Consumer's Experience when heating.
Another object of the present invention is to propose a kind of multiple on-line system.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of method for noise reduction control of multiple on-line system, wherein, described multiple on-line system comprises off-premises station and multiple indoor set, each described indoor set comprises indoor heat exchanger and electric expansion valve, and described method for noise reduction control comprises the following steps: S1: obtain the degree of supercooling being in the indoor set of holding state in described multiple indoor set; And S2: the aperture controlling the electric expansion valve corresponding with the described indoor set being in holding state according to the described degree of supercooling being in the indoor set of holding state, to be in the noise of the indoor set of holding state described in reducing.
According to the method for noise reduction control of the multiple on-line system of the embodiment of the present invention, when multiple on-line system operates in heating mode, obtain the degree of supercooling being in the indoor set of holding state, and control according to the degree of supercooling being in the indoor set of holding state obtained the aperture that this is in electric expansion valve in the indoor set of holding state, can be in in the indoor heat exchanger of the indoor set of holding state, refrigerant stockpiles to some extent at this like this, certain aperture is arrived by opening corresponding electric expansion valve, thus can significantly reduce indoor set standby time the noise that causes of refrigerant flowing sound, improve Consumer's Experience.
According to one embodiment of present invention, described step S1 specifically comprises: the high side pressure P detecting compressor in described off-premises station
k; The outlet temperature T of indoor heat exchanger in the indoor set of holding state is in described in detection
a; According to described high side pressure P
kcorresponding saturation temperature T
kwith described outlet temperature T
athe degree of supercooling of the indoor set of holding state is in described in calculating.
According to one embodiment of present invention, described step S2 specifically comprises: if described in be in the indoor set of holding state degree of supercooling be more than or equal to 0 and be less than the first preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be in closed condition; If described in be in the indoor set of holding state degree of supercooling be more than or equal to described first preset value and be less than the second preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be opened into the first aperture, wherein, described second preset value is greater than described first preset value; If described in be in the indoor set of holding state degree of supercooling be more than or equal to described second preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be opened into the second aperture, wherein, described second aperture is greater than described first aperture.
Particularly, described first aperture can be 0 ~ 1/10 of the maximum opening of described electric expansion valve, described second aperture can be 1/10 ~ 1/5 of the maximum opening of described electric expansion valve, and described first preset value can be 0 ~ 5 degree, and described second preset value can be 5 ~ 10 degree.
Wherein, the noise being in the indoor set of holding state described in for described in be in the different sound of refrigerant flowing in the indoor set of holding state.
For achieving the above object, a kind of multiple on-line system that the present invention's another aspect embodiment proposes, comprising: off-premises station; Multiple indoor set, each described indoor set comprises indoor heat exchanger and electric expansion valve; And control module, described control module is in the degree of supercooling of the indoor set of holding state in described multiple indoor set for obtaining, and control the aperture of the electric expansion valve corresponding with the described indoor set being in holding state according to the described degree of supercooling being in the indoor set of holding state, to be in the noise of the indoor set of holding state described in reducing.
According to the multiple on-line system of the embodiment of the present invention, when heating mode runs, the degree of supercooling being in the indoor set of holding state is obtained by control module, control module also controls according to the degree of supercooling being in the indoor set of holding state obtained the aperture that this is in electric expansion valve in the indoor set of holding state, can be in in the indoor heat exchanger of the indoor set of holding state, refrigerant stockpiles to some extent at this like this, certain aperture is arrived by opening corresponding electric expansion valve, thus can significantly reduce indoor set standby time the noise that causes of refrigerant flowing sound, improve Consumer's Experience.
According to one embodiment of present invention, the high side pressure P of compressor in described off-premises station is detected by the first pressure sensor
k, and described in being detected by the first temperature sensor, be in the outlet temperature T of indoor heat exchanger in the indoor set of holding state
a, described control module is according to described high side pressure P
kcorresponding saturation temperature T
kwith described outlet temperature T
athe degree of supercooling of the indoor set of holding state is in described in calculating.
Wherein, described first pressure sensor can be arranged on the high-pressure side of described compressor, and described first temperature sensor can be arranged on the exit of indoor heat exchanger in each described indoor set.
According to one embodiment of present invention, when the described degree of supercooling being in the indoor set of holding state is more than or equal to 0 and is less than the first preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is in closed condition; When the described degree of supercooling being in the indoor set of holding state is more than or equal to described first preset value and is less than the second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the first aperture, wherein, described second preset value is greater than described first preset value; When the described degree of supercooling being in the indoor set of holding state is more than or equal to described second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the second aperture, wherein, described second aperture is greater than described first aperture.
Particularly, described first aperture can be 0 ~ 1/10 of the maximum opening of described electric expansion valve, described second aperture can be 1/10 ~ 1/5 of the maximum opening of described electric expansion valve, and described first preset value can be 0 ~ 5 degree, and described second preset value can be 5 ~ 10 degree.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the flow chart of the method for noise reduction control of multiple on-line system according to the embodiment of the present invention;
Fig. 2 is the control schematic diagram of the electric expansion valve of standby according to an embodiment of the invention indoor set; And
Fig. 3 is the structural representation of multiple on-line system according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Method for noise reduction control and the multiple on-line system of the multiple on-line system proposed according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the method for noise reduction control of multiple on-line system according to the embodiment of the present invention.Wherein, this multiple on-line system comprises off-premises station and multiple indoor set, and each indoor set comprises indoor heat exchanger and electric expansion valve.As shown in Figure 1, the method for noise reduction control of this multiple on-line system comprises the following steps:
S1, obtains the degree of supercooling of the indoor set being in holding state in multiple indoor set.
According to one embodiment of present invention, step S1 specifically comprises: the high side pressure P detecting compressor in off-premises station
k; Detect the outlet temperature T being in indoor heat exchanger in the indoor set of holding state
a; According to high side pressure P
kcorresponding saturation temperature T
kwith outlet temperature T
acalculate the degree of supercooling being in the indoor set of holding state, be namely in the degree of supercooling SC=T of the indoor set of holding state
k-T
a.
S2, controls the aperture of the electric expansion valve corresponding with the indoor set being in holding state, to reduce the noise of the indoor set being in holding state according to the degree of supercooling of the indoor set being in holding state.
Wherein, the noise being in the indoor set of holding state is the different sound of refrigerant flowing in the indoor set being in holding state.
According to one embodiment of present invention, step S2 specifically comprises:
If the degree of supercooling being in the indoor set of holding state is more than or equal to 0 and be less than the first preset value, control the electric expansion valve corresponding with the indoor set being in holding state and be in closed condition, namely when the degree of supercooling of standby indoor set is lower, the refrigerant stockpiled is less, the electric expansion valve of turning off standby indoor set, makes standby indoor set can not produce the different sound of refrigerant flowing.If the degree of supercooling being in the indoor set of holding state is more than or equal to the first preset value and be less than the second preset value, controls the electric expansion valve corresponding with the indoor set being in holding state and be opened into the first aperture, wherein, the second preset value is greater than the first preset value; If the degree of supercooling being in the indoor set of holding state is more than or equal to the second preset value, controls the electric expansion valve corresponding with the indoor set being in holding state and be opened into the second aperture, wherein, the second aperture is greater than the first aperture.Namely say, when the degree of supercooling of standby indoor set reaches certain value, open the aperture of the electric expansion valve of standby indoor set stage by stage, to discharge the refrigerant stockpiled.
Therefore say, in an embodiment of the present invention, when multiple on-line system is in heating mode, the electric expansion valve being in the indoor set of holding state controlling not open is closed, then judge whether refrigerant and refrigeration oil occur stockpiling situation according to the degree of supercooling of the indoor set being in holding state, open the electric expansion valve of standby indoor set when the degree of supercooling of standby indoor set meets above-mentioned condition again, greatly reduce the refrigerant flow noise of standby indoor set like this, obtain better Consumer's Experience.
That is, when multiple on-line system operates in heating mode, the electric expansion valve of the indoor set being in open state is normally controlled, the electric expansion valve being in the indoor set of holding state of not starting shooting is shut.Then pressure sensor is utilized to detect the high-pressure of multiple on-line system and the high side pressure P of compressor
k, and calculate high-pressure P
kcorresponding saturation temperature T
k, then utilize the temperature sensor being in the indoor set of holding state to detect the indoor heat exchanger of this standby indoor set and the outlet temperature T of evaporimeter
a, then calculate the degree of supercooling of this indoor set: SC=T
k– T
a.
Wherein, as 0≤SC ﹤ T
th1time (i.e. the first preset value), the electric expansion valve of this standby indoor set is kept closed condition; Work as T
th1≤ SC ﹤ T
th2time (i.e. the second preset value), the electric expansion valve of standby indoor set is opened into A aperture (i.e. the first aperture); As SC>=T
th2time, the electric expansion valve of standby indoor set is opened into B aperture (i.e. the second aperture).
Particularly, the first aperture A is generally 0 ~ 1/10 of electric expansion valve maximum opening, and the second aperture B is generally 1/10 ~ 1/5 of electric expansion valve maximum opening, the first preset value T
th1general at 0 ~ 5 degree, the second preset value T
th2general at 5 ~ 10 degree, as shown in Figure 2, T
th3and T
th4be the temperature step that electronic expansion valve body frequently regulates setting, compare T general homology
th2and T
th1little 1 ~ 3 degree.
It can thus be appreciated that, when multiple on-line system is in heating mode, the electric expansion valve most of the time of the standby indoor set do not opened is in closed condition, in the evaporimeter of standby indoor set, refrigerant just opens corresponding aperture when stockpiling to some extent, this with regard to greatly reduce indoor set standby time refrigerant to flow different sound, improve Consumer's Experience.
According to the method for noise reduction control of the multiple on-line system of the embodiment of the present invention, when multiple on-line system operates in heating mode, obtain the degree of supercooling being in the indoor set of holding state, and control according to the degree of supercooling being in the indoor set of holding state obtained the aperture that this is in electric expansion valve in the indoor set of holding state, can be in in the indoor heat exchanger of the indoor set of holding state, refrigerant stockpiles to some extent at this like this, certain aperture is arrived by opening corresponding electric expansion valve, thus can significantly reduce indoor set standby time the noise that causes of refrigerant flowing sound, improve Consumer's Experience.
Fig. 3 is the structural representation of multiple on-line system according to an embodiment of the invention.As shown in Figure 3, this multiple on-line system comprises: off-premises station 100, multiple indoor set 21,22 ..., 2n, and control module (not shown).
Wherein, each indoor set comprises indoor heat exchanger and electric expansion valve, and such as indoor set 21 comprises indoor heat exchanger 213 and electric expansion valve 211, and indoor set 22 comprises indoor heat exchanger 223 and electric expansion valve 221,, indoor set 2n comprises indoor heat exchanger 2n3 and electric expansion valve 2n1.Control module is for obtaining the degree of supercooling of the indoor set being in holding state in multiple indoor set, and control the aperture of the electric expansion valve corresponding with the indoor set being in holding state according to the degree of supercooling of the indoor set being in holding state, to reduce the noise of the indoor set being in holding state.
As shown in Figure 3, off-premises station 100 comprises compressor 11, cross valve 13, outdoor heat exchanger 14, outdoor heat exchanger blower fan 15, off-premises station restricting element 16, low-pressure oil storage 17 and is arranged on the first pressure sensor 12 between compressor 11 and cross valve 13, namely say, the first pressure sensor 12 is arranged on the high-pressure side of compressor 11.And, each indoor set also comprises the first temperature sensor, namely indoor set 21 also comprises the first temperature sensor 212, indoor set 22 also comprises the first temperature sensor 222, indoor set 2n also comprises the first temperature sensor 2n2, and wherein, the first temperature sensor is arranged on the exit of indoor heat exchanger in each indoor set.
According to one embodiment of present invention, the high side pressure P of compressor 11 in off-premises station is detected by the first pressure sensor 12
k, and the outlet temperature T being in indoor heat exchanger in the indoor set of holding state is detected by the first temperature sensor
a, such control module is according to high side pressure P
kcorresponding saturation temperature T
kwith outlet temperature T
acalculate the degree of supercooling being in the indoor set of holding state, i.e. the degree of supercooling SC=T of standby indoor set
k-T
a.
Wherein, when the described degree of supercooling being in the indoor set of holding state is more than or equal to 0 and is less than the first preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is in closed condition; When the described degree of supercooling being in the indoor set of holding state is more than or equal to described first preset value and is less than the second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the first aperture, wherein, described second preset value is greater than described first preset value; When the described degree of supercooling being in the indoor set of holding state is more than or equal to described second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the second aperture, wherein, described second aperture is greater than described first aperture.
Therefore say, in an embodiment of the present invention, when multiple on-line system is in heating mode, the electric expansion valve being in the indoor set of holding state that control module controls not open is closed, then judge whether refrigerant and refrigeration oil occur stockpiling situation according to the degree of supercooling of the indoor set being in holding state, the electric expansion valve of standby indoor set is opened again when the degree of supercooling of standby indoor set meets above-mentioned condition, greatly reduce the refrigerant flow noise of standby indoor set like this, obtain better Consumer's Experience.
Particularly, the first aperture A is generally 0 ~ 1/10 of electric expansion valve maximum opening, and the second aperture B is generally 1/10 ~ 1/5 of electric expansion valve maximum opening, the first preset value T
th1general at 0 ~ 5 degree, the second preset value T
th2general at 5 ~ 10 degree, as shown in Figure 2, T
th3and T
th4be the temperature step that electronic expansion valve body frequently regulates setting, compare T general homology
th1and T
th2little 1 ~ 3 degree.
According to the multiple on-line system of the embodiment of the present invention, when heating mode runs, the degree of supercooling being in the indoor set of holding state is obtained by control module, control module also controls according to the degree of supercooling being in the indoor set of holding state obtained the aperture that this is in electric expansion valve in the indoor set of holding state, can be in in the indoor heat exchanger of the indoor set of holding state, refrigerant stockpiles to some extent at this like this, certain aperture is arrived by opening corresponding electric expansion valve, thus can significantly reduce indoor set standby time the noise that causes of refrigerant flowing sound, improve Consumer's Experience.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (10)
1. a method for noise reduction control for multiple on-line system, is characterized in that, described multiple on-line system comprises off-premises station and multiple indoor set, and each described indoor set comprises indoor heat exchanger and electric expansion valve, and described method for noise reduction control comprises the following steps:
S1: obtain the degree of supercooling being in the indoor set of holding state in described multiple indoor set; And
S2: the aperture controlling the electric expansion valve corresponding with the described indoor set being in holding state according to the described degree of supercooling being in the indoor set of holding state, to be in the noise of the indoor set of holding state described in reducing.
2. the method for noise reduction control of multiple on-line system as claimed in claim 1, it is characterized in that, described step S1 specifically comprises:
Detect the high side pressure P of compressor in described off-premises station
k;
The outlet temperature T of indoor heat exchanger in the indoor set of holding state is in described in detection
a;
According to described high side pressure P
kcorresponding saturation temperature T
kwith described outlet temperature T
athe degree of supercooling of the indoor set of holding state is in described in calculating.
3. the method for noise reduction control of multiple on-line system as claimed in claim 1 or 2, it is characterized in that, described step S2 specifically comprises:
If described in be in the indoor set of holding state degree of supercooling be more than or equal to 0 and be less than the first preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be in closed condition;
If described in be in the indoor set of holding state degree of supercooling be more than or equal to described first preset value and be less than the second preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be opened into the first aperture, wherein, described second preset value is greater than described first preset value;
If described in be in the indoor set of holding state degree of supercooling be more than or equal to described second preset value, control the electric expansion valve corresponding with the described indoor set being in holding state and be opened into the second aperture, wherein, described second aperture is greater than described first aperture.
4. the method for noise reduction control of multiple on-line system as claimed in claim 3, it is characterized in that, described first aperture is 0 ~ 1/10 of the maximum opening of described electric expansion valve, described second aperture is 1/10 ~ 1/5 of the maximum opening of described electric expansion valve, described first preset value is 0 ~ 5 degree, and described second preset value is 5 ~ 10 degree.
5. the method for noise reduction control of multiple on-line system as claimed in claim 1, is characterized in that, described in be in the indoor set of holding state noise for described in be in the different sound of refrigerant flowing in the indoor set of holding state.
6. a multiple on-line system, is characterized in that, comprising:
Off-premises station;
Multiple indoor set, each described indoor set comprises indoor heat exchanger and electric expansion valve; And
Control module, described control module is in the degree of supercooling of the indoor set of holding state in described multiple indoor set for obtaining, and control the aperture of the electric expansion valve corresponding with the described indoor set being in holding state according to the described degree of supercooling being in the indoor set of holding state, to be in the noise of the indoor set of holding state described in reducing.
7. multiple on-line system as claimed in claim 6, be is characterized in that, detected the high side pressure P of compressor in described off-premises station by the first pressure sensor
k, and described in being detected by the first temperature sensor, be in the outlet temperature T of indoor heat exchanger in the indoor set of holding state
a, described control module is according to described high side pressure P
kcorresponding saturation temperature T
kwith described outlet temperature T
athe degree of supercooling of the indoor set of holding state is in described in calculating.
8. multiple on-line system as claimed in claim 7, it is characterized in that, described first pressure sensor is arranged on the high-pressure side of described compressor, and described first temperature sensor is arranged on the exit of indoor heat exchanger in each described indoor set.
9. the multiple on-line system according to any one of claim 6-8, is characterized in that,
When the described degree of supercooling being in the indoor set of holding state is more than or equal to 0 and is less than the first preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is in closed condition;
When the described degree of supercooling being in the indoor set of holding state is more than or equal to described first preset value and is less than the second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the first aperture, wherein, described second preset value is greater than described first preset value;
When the described degree of supercooling being in the indoor set of holding state is more than or equal to described second preset value, described control module controls the electric expansion valve corresponding with the described indoor set being in holding state and is opened into the second aperture, wherein, described second aperture is greater than described first aperture.
10. multiple on-line system as claimed in claim 9, it is characterized in that, described first aperture is 0 ~ 1/10 of the maximum opening of described electric expansion valve, described second aperture is 1/10 ~ 1/5 of the maximum opening of described electric expansion valve, described first preset value is 0 ~ 5 degree, and described second preset value is 5 ~ 10 degree.
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