CN105258275A - Multi-split system and low noise control method for electronic expansion valves of multi-split system - Google Patents
Multi-split system and low noise control method for electronic expansion valves of multi-split system Download PDFInfo
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- CN105258275A CN105258275A CN201510612020.9A CN201510612020A CN105258275A CN 105258275 A CN105258275 A CN 105258275A CN 201510612020 A CN201510612020 A CN 201510612020A CN 105258275 A CN105258275 A CN 105258275A
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- expansion valve
- sound pressure
- electric expansion
- indoor set
- pressure level
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a multi-split system and a low noise control method for electronic expansion valves of the multi-split system. The low noise control method includes the following steps that the sound pressure levels of the electronic expansion valves in all indoor units are collected in real time and judged; if the sound pressure level of the electronic expansion valve in any indoor unit is larger than a preset standard sound pressure level, it is judged that the electronic expansion valve has abnormal noise, and the model of the electronic expansion valve is obtained; a preset electronic expansion valve pressure difference-opening degree-sound pressure level array is called according to the model of the electronic expansion valve to obtain multiple opening degree control values, and the electronic expansion valve is controlled sequentially according to the multiple opening degree control values to obtain multiple current sound pressure levels; and an opening degree target value is obtained according to the multiple current sound pressure levels, and the electronic expansion valve is controlled according to the opening degree target value so that the electronic expansion valve can go in a smallest noise mode. By means of the low noise control method, closed-loop low-noise control is carried out over the electronic expansion valves in all the indoor units along with the pressure difference and the opening degree, and the noise is greatly lowered.
Description
Technical field
The present invention relates to multi-connected machine technical field, particularly the low noise control method of electric expansion valve and a kind of multiple on-line system in a kind of multiple on-line system.
Background technology
In correlation technique, multiple on-line system is when heating standby, the electric expansion valve of all or part of indoor set is in low discharge throttle, and the electric expansion valve of all indoor sets unifies opened loop control, and namely the electric expansion valve of all indoor sets of holding state is unified controls in a certain specific aperture.
But electric expansion valve used is unified controls aperture, and because each indoor set workload is different, the electric expansion valve of part indoor set usually can produce larger refrigerant sound, even amplifies in evaporimeter, has a strong impact on product quality and public praise; Secondly, the noise pressure difference of electric expansion valve and aperture affect larger, and all electric expansion valve opened loop control, will at indoor set by producing larger Refrigerant noise under the electric expansion valve of some or all indoor set is still in certain specific aperture when outer work condition and load variable effect; In addition, each indoor set may use the electric expansion valve of different model, and between the electric expansion valve of different model, there is larger difference, control in certain specific aperture if all electric expansion valves are unified, due to throttle structure and the flow curve difference of each electric expansion valve, very little at this specific aperture lower part electric expansion valve possibility noise, but also may there is serious noise problem by portions of electronics expansion valve.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the low noise control method proposing electric expansion valve in a kind of multiple on-line system, electric expansion valve can be realized in each indoor set carry out closed loop low noiseization with pressure reduction and aperture and control, greatly reduce multiple on-line system enter heating standby pattern after noise.
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 the low noise control method of electric expansion valve in a kind of multiple on-line system, wherein, described multiple on-line system comprises off-premises station and multiple indoor set, in described multiple indoor set, each indoor set comprises electric expansion valve, said method comprising the steps of: when described multiple on-line system enters heating standby pattern, the sound pressure level of electric expansion valve in each indoor set of Real-time Collection, and the sound pressure level of electric expansion valve in each indoor set is judged; If the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set; Call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to described multiple aperture controlling value; Obtain aperture desired value according to described multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to described aperture desired value.
According to the low noise control method of electric expansion valve in the multiple on-line system of the embodiment of the present invention, judged by the sound pressure level of electric expansion valve in each indoor set of Real-time Collection, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, then judge that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, then default electric expansion valve pressure reduction-aperture-sound pressure level array is called to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value, finally obtain aperture desired value according to multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value, thus electric expansion valve can be realized in each indoor set carry out closed loop low noiseization with pressure reduction and aperture and control, greatly reduce multiple on-line system enter heating standby pattern after noise, meet the needs of user, improve Consumer's Experience.
According to one embodiment of present invention, described multiple aperture controlling value is the aperture that in described default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
According to one embodiment of present invention, described according to described multiple current sound pressure level acquisition aperture desired value, specifically comprise: obtain the minimal sound pressure levels in described multiple current sound pressure level; When the minimal sound pressure levels in described multiple current sound pressure level is less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
And, described according to described multiple current sound pressure level acquisition aperture desired value, also comprise: when the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.
According to one embodiment of present invention, if the sound pressure level of electric expansion valve is less than or equal to described default standard sound pressure level in any one indoor set, then keep the current aperture of electric expansion valve in this indoor set constant.
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, in described multiple indoor set, each indoor set comprises electric expansion valve; Multiple sound level meter, in described multiple sound level meter, each sound level meter correspondence detects the sound pressure level of electric expansion valve in each indoor set; control module, described control module is used for the sound pressure level of the electric expansion valve in each indoor set of Real-time Collection when described multiple on-line system enters heating standby pattern, and the sound pressure level of electric expansion valve in each indoor set is judged, wherein, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, described control module then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, and call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to described multiple aperture controlling value, and described control module obtains aperture desired value according to described multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to described aperture desired value.
According to the multiple on-line system of the embodiment of the present invention, the sound pressure level of electric expansion valve in each indoor set is detected by each sound level meter correspondence, then in each indoor set of control module Real-time Collection electric expansion valve sound pressure level and judge, wherein, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, control module then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, then control module calls default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value, last control module obtains aperture desired value according to multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value, thus electric expansion valve can be realized in each indoor set carry out closed loop low noiseization with pressure reduction and aperture and control, greatly reduce multiple on-line system enter heating standby pattern after noise, meet the needs of user, improve Consumer's Experience.
According to one embodiment of present invention, described multiple aperture controlling value is the aperture that in described default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
According to one embodiment of present invention, described control module is further used for obtaining the minimal sound pressure levels in described multiple current sound pressure level, and the minimal sound pressure levels in described multiple current sound pressure level is when being less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
And, when the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, described control module using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.
According to one embodiment of present invention, if the sound pressure level of electric expansion valve is less than or equal to described default standard sound pressure level in any one indoor set, described control module then keeps the current aperture of electric expansion valve in this indoor set constant.
Accompanying drawing explanation
Fig. 1 is the flow chart of the low noise control method of electric expansion valve in the multiple on-line system according to the embodiment of the present invention;
Fig. 2 is the flow chart of the low noise control method of the A model electric expansion valve being numbered 2 in the multiple on-line system according to the present invention's specific embodiment; And
Fig. 3 is the block diagram of the multiple on-line system according to the embodiment of the present 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.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Low noise control method and the multiple on-line system of electric expansion valve in 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 low noise control method of electric expansion valve in the multiple on-line system according to the embodiment of the present invention, and wherein, this multiple on-line system comprises off-premises station and multiple indoor set, and each indoor set comprises electric expansion valve.As shown in Figure 1, in this multiple on-line system, the low noise control method of electric expansion valve comprises the following steps:
S1, when multiple on-line system enters heating standby pattern, the sound pressure level of electric expansion valve in each indoor set of Real-time Collection, and the sound pressure level of electric expansion valve in each indoor set is judged.
Wherein, by being arranged on sound level meter on each electric expansion valve to detect the sound pressure level of respective electronic expansion valve, then control module can gather the sound pressure level that each sound level meter detects in real time.
It should be noted that, in an embodiment of the present invention, when multiple on-line system enters heating standby pattern, control to comprise automatic control mode and MANUAL CONTROL mode to the low noise of electric expansion valve in multiple on-line system.Wherein, at automatic control mode, the sound pressure level that control module detects each sound level meter in real time gathers and judges; At MANUAL CONTROL mode, control module gathers according to user instruction the sound pressure level that respective levels meter detects and judges.
S2, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtains the model of electric expansion valve in this indoor set.
Wherein, standard sound pressure level Lp0 can prestore in the control module.
S3, call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value.
Wherein, multiple aperture controlling value is the aperture that in default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
Further, can prestore multiple electric expansion valve pressure reduction-aperture-sound pressure level array in the control module, each electric expansion valve pressure reduction-aperture-sound pressure level array is corresponding with the model of electric expansion valve.Electric expansion valve pressure reduction-aperture-sound pressure level array that such as A model electric expansion valve is corresponding can be as shown in table 1 below, and electric expansion valve pressure reduction-aperture-sound pressure level array that Type B electric expansion valve is corresponding can be as shown in table 2 below.
Table 1
Table 2
Wherein, n and m is positive integer.
S4, obtains aperture desired value according to multiple current sound pressure level, and controls to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value.
According to the low noise control method of electric expansion valve in the multiple on-line system of the embodiment of the present invention, judged by the sound pressure level of electric expansion valve in each indoor set of Real-time Collection, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, then judge that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, then default electric expansion valve pressure reduction-aperture-sound pressure level array is called to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value, finally obtain aperture desired value according to multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value, thus electric expansion valve can be realized in each indoor set carry out closed loop low noiseization with pressure reduction and aperture and control, greatly reduce multiple on-line system enter heating standby pattern after noise, meet the needs of user, improve Consumer's Experience.
According to one embodiment of present invention, in step s 4 which, obtain aperture desired value according to described multiple current sound pressure level, specifically comprise: obtain the minimal sound pressure levels in described multiple current sound pressure level; When the minimal sound pressure levels in described multiple current sound pressure level is less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
And, described according to described multiple current sound pressure level acquisition aperture desired value, also comprise: when the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.Wherein, according to initial opening value, electric expansion valve is controlled, regulate electric expansion valve to enter minimal noise pattern exactly.
Particularly, according to one embodiment of present invention, as shown in Figure 2, if occur in certain indoor set that the model of the electric expansion valve of noise exception is A, and be numbered 2, then the opening control signal of this electric expansion valve is P2 (initial opening value is P20), occurs that the sound pressure level Lp2 corresponding to electric expansion valve of noise exception is greater than default standard sound pressure level Lp0, thus needs to carry out low noise adjustment to this electric expansion valve.Call electric expansion valve pressure reduction-aperture-sound pressure level array LpA corresponding to A model electric expansion valve (supposing that array dimension is 4 × 6), the aperture selecting minimal sound pressure levels under each pressure differential deltap P1 ~ Δ P4 corresponding from array LpA and multiple aperture controlling value, such as PA3, PA2, PA5, PA6.And correspondence arranges P2 signal is followed successively by PA3, PA2, PA5, PA6, successively aperture control is carried out to this electric expansion valve according to these P2 signals, the sound level meter that this electric expansion valve is corresponding simultaneously feeds back current sound pressure level LpA3, LpA2, LpA5, LpA6, to multiple current sound pressure level LpA3, LpA2, LpA5, LpA6 carries out selecting little calculating and Min (LpA3, LpA2, LpA5, LpA6), thus the minimal sound pressure levels such as LpA5 that can obtain in multiple current sound pressure level, obtain aperture controlling value corresponding to LpA5 and PA5, if LpA5 is less than Lp2, then P2 is set to PA5, minimal noise pattern is entered to control this electric expansion valve, if LpA5 is more than or equal to Lp2, then P2 is set to initial opening value P20, wherein, initial setting up has been the minimal noise pattern of this electric expansion valve.
According to one embodiment of present invention, if the sound pressure level of electric expansion valve is less than or equal to default standard sound pressure level in any one indoor set, then keep the current aperture of electric expansion valve in this indoor set constant.
In sum, in an embodiment of the present invention, by setting up electronic expansion valve controls signal array Pi, wherein i=1,2,3 ... represent electronic expansion valve of indoor unit numbering, thus realize control module such as off-premises station control chip independent control is carried out to the aperture of electric expansion valve in each indoor set, thus according to different load set different target apertures, the generation of part valve refrigerant sound can be reduced; And, by setting up electric expansion valve pressure reduction-aperture-sound pressure level array Lpi corresponding to different model electric expansion valve, wherein i=A, B, C, D, represent model or the batch code of electric expansion valve in indoor set, these array Lpi are preset in the control module, and presets the standard sound pressure level Lp0 of the basic noise of indoor set in the control module, like this when each indoor set uses the electric expansion valve of different model or different batches, the independent optimized control of each electric expansion valve can be realized, ensure that the low noiseization of electric expansion valve in whole indoor set controls; In addition, control strategy increases minimal noise pattern, on hardware on each electric expansion valve relative set sound level meter to detect the sound pressure level of each electric expansion valve and to feed back, when outer work condition and load change, based on sound level meter feedback signal, realize electric expansion valve to control with the closed loop low noiseization of pressure reduction and aperture two dimension, avoid portions of electronics expansion valve to occur larger noise.
Fig. 3 is the block diagram of the multiple on-line system according to the embodiment of the present invention.As shown in Figure 3, this multiple on-line system 100 comprises off-premises station 10, multiple indoor set 20, multiple sound level meter 30 and control module 40.
Wherein, in multiple indoor set, each indoor set 20 comprises electric expansion valve 201, and in multiple sound level meter, each sound level meter 30 correspondence detects the sound pressure level of electric expansion valve 201 in each indoor set.According to one embodiment of present invention, each sound level meter 30 may correspond to and to be arranged in each indoor set on electric expansion valve 201.
The control chip of control module 40 such as off-premises station is used for the sound pressure level of the electric expansion valve 201 in each indoor set of Real-time Collection when multiple on-line system enters heating standby pattern, and the sound pressure level of electric expansion valve 201 in each indoor set is judged, wherein, if the sound pressure level of electric expansion valve 201 is greater than default standard sound pressure level Lp0 in any one indoor set, control module 40 judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, and call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value, and control module 40 obtains aperture desired value according to multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value.
Wherein, standard sound pressure level Lp0 can prestore in the control module, and multiple aperture controlling value is the aperture that in default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
Further, can prestore multiple electric expansion valve pressure reduction-aperture-sound pressure level array in control module 40, each electric expansion valve pressure reduction-aperture-sound pressure level array is corresponding with the model of electric expansion valve.Electric expansion valve pressure reduction-aperture-sound pressure level array that such as A model electric expansion valve is corresponding can as shown in Table 1, and electric expansion valve pressure reduction-aperture-sound pressure level array that Type B electric expansion valve is corresponding can as above shown in table 2.
According to the multiple on-line system of the embodiment of the present invention, the sound pressure level of electric expansion valve in each indoor set is detected by each sound level meter correspondence, then in each indoor set of control module Real-time Collection electric expansion valve sound pressure level and judge, wherein, if the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, control module then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, then control module calls default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to multiple aperture controlling value, last control module obtains aperture desired value according to multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to aperture desired value, thus electric expansion valve can be realized in each indoor set carry out closed loop low noiseization with pressure reduction and aperture and control, greatly reduce multiple on-line system enter heating standby pattern after noise, meet the needs of user, improve Consumer's Experience.
According to one embodiment of present invention, control module 40 is further used for obtaining the minimal sound pressure levels in described multiple current sound pressure level, and the minimal sound pressure levels in described multiple current sound pressure level is when being less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
Further, when the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, control module 40 using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.Wherein, according to initial opening value, electric expansion valve is controlled, regulate electric expansion valve to enter minimal noise pattern exactly.
According to one embodiment of present invention, if the sound pressure level of electric expansion valve is less than or equal to described default standard sound pressure level in any one indoor set, control module 40 keeps the current aperture of electric expansion valve in this indoor set constant.
In sum, in the multiple on-line system of the embodiment of the present invention, by setting up electronic expansion valve controls signal array Pi, wherein i=1,2,3 ... represent electronic expansion valve of indoor unit numbering, thus realize control module such as off-premises station control chip independent control is carried out to the aperture of electric expansion valve in each indoor set, thus according to different load set different target apertures, the generation of part valve refrigerant sound can be reduced; And, by setting up electric expansion valve pressure reduction-aperture-sound pressure level array Lpi corresponding to different model electric expansion valve, wherein i=A, B, C, D, represent model or the batch code of electric expansion valve in indoor set, these array Lpi are preset in the control module, and presets the standard sound pressure level Lp0 of the basic noise of indoor set in the control module, like this when each indoor set uses the electric expansion valve of different model or different batches, the independent optimized control of each electric expansion valve can be realized, ensure that the low noiseization of electric expansion valve in whole indoor set controls; In addition, control strategy increases minimal noise pattern, on hardware on each electric expansion valve relative set sound level meter to detect the sound pressure level of each electric expansion valve and to feed back, when outer work condition and load change, based on sound level meter feedback signal, realize electric expansion valve to control with the closed loop low noiseization of pressure reduction and aperture two dimension, avoid portions of electronics expansion valve to occur larger noise.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
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, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. the low noise control method of electric expansion valve in multiple on-line system, it is characterized in that, described multiple on-line system comprises off-premises station and multiple indoor set, and in described multiple indoor set, each indoor set comprises electric expansion valve, said method comprising the steps of:
When described multiple on-line system enters heating standby pattern, the sound pressure level of electric expansion valve in each indoor set of Real-time Collection, and the sound pressure level of electric expansion valve in each indoor set is judged;
If the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set;
Call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to described multiple aperture controlling value;
Obtain aperture desired value according to described multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to described aperture desired value.
2. method according to claim 1, is characterized in that, described multiple aperture controlling value is the aperture that in described default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
3. method according to claim 1 and 2, is characterized in that, described according to described multiple current sound pressure level acquisition aperture desired value, specifically comprises:
Obtain the minimal sound pressure levels in described multiple current sound pressure level;
When the minimal sound pressure levels in described multiple current sound pressure level is less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
4. method according to claim 3, is characterized in that, described according to described multiple current sound pressure level acquisition aperture desired value, also comprises:
When the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.
5. method according to claim 1, is characterized in that, if the sound pressure level of electric expansion valve is less than or equal to described default standard sound pressure level in any one indoor set, then keeps the current aperture of electric expansion valve in this indoor set constant.
6. a multiple on-line system, is characterized in that, comprising:
Off-premises station;
Multiple indoor set, in described multiple indoor set, each indoor set comprises electric expansion valve;
Multiple sound level meter, in described multiple sound level meter, each sound level meter correspondence detects the sound pressure level of electric expansion valve in each indoor set;
Control module, described control module is used for the sound pressure level of the electric expansion valve in each indoor set of Real-time Collection when described multiple on-line system enters heating standby pattern, and judges the sound pressure level of electric expansion valve in each indoor set, wherein,
If the sound pressure level of electric expansion valve is greater than default standard sound pressure level in any one indoor set, described control module then judges that in this indoor set, electric expansion valve occurs that noise is abnormal, and obtain the model of electric expansion valve in this indoor set, and call default electric expansion valve pressure reduction-aperture-sound pressure level array to obtain multiple aperture controlling value according to the model of electric expansion valve in this indoor set, and control to obtain multiple current sound pressure level to electric expansion valve in this indoor set successively according to described multiple aperture controlling value, and described control module obtains aperture desired value according to described multiple current sound pressure level, and control to make electric expansion valve in this indoor set enter minimal noise pattern to electric expansion valve in this indoor set according to described aperture desired value.
7. multiple on-line system according to claim 6, is characterized in that, described multiple aperture controlling value is the aperture that in described default electric expansion valve pressure reduction-aperture-sound pressure level array, under each pressure reduction, minimal sound pressure levels is corresponding.
8. the multiple on-line system according to claim 6 or 7, it is characterized in that, described control module is further used for obtaining the minimal sound pressure levels in described multiple current sound pressure level, and the minimal sound pressure levels in described multiple current sound pressure level is when being less than sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, using aperture controlling value corresponding for the minimal sound pressure levels in described multiple current sound pressure level as described aperture desired value.
9. multiple on-line system according to claim 8, it is characterized in that, when the minimal sound pressure levels in described multiple current sound pressure level is more than or equal to sound pressure level when electric expansion valve in this indoor set occurs that noise is abnormal, described control module using the initial opening value of electric expansion valve in this indoor set as described aperture desired value.
10. multiple on-line system according to claim 6, it is characterized in that, if the sound pressure level of electric expansion valve is less than or equal to described default standard sound pressure level in any one indoor set, described control module then keeps the current aperture of electric expansion valve in this indoor set constant.
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