CN102331071B - Anti-voltage fluctuation automatic static pressure recognition method and system for air pipe type air conditioning indoor unit - Google Patents
Anti-voltage fluctuation automatic static pressure recognition method and system for air pipe type air conditioning indoor unit Download PDFInfo
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Abstract
The invention provides an anti-voltage fluctuation automatic static pressure recognition method and an anti-voltage fluctuation automatic static pressure recognition system for an air pipe type air conditioning indoor unit. A VSP correction coefficient K and voltage detection balance module is additionally arranged in the conventional anti-voltage fluctuation automatic static pressure recognition method and anti-voltage fluctuation automatic static pressure recognition system, so that automatic static pressure recognition of the air pipe type air conditioning indoor unit and static pressure adjustment of a project site can still be realized well during voltage fluctuation of a power grid, the voltage fluctuation balance capacity and adaptability are improved, the mounting design of the site is facilitated, and the stability and the operation efficiency of the system are improved.
Description
Technical field
The present invention relates to a kind of automatic identifying method and system of air-conditioning static pressure, specifically automatic static pressure recognition method and the system thereof of a kind of air duct type air conditioning indoor machine in the voltage ripple of power network situation.
Background technology
When air duct type air conditioning indoor machine is installed at engineering site, installation environment is different, has the demand of different static pressure.What traditional air-cooled ducted air conditioner was used is AC asynchronous motor, must be according to the design of engineering site airduct, and selected suitable static pressure specification.Due to Domestic Air-condition installation aspect standard not too, the unmatched phenomenon of static pressure often appears, affect comfortableness and the reliability of product.Simultaneously, the air-conditioning that air-conditioning equipment producer need to produce a variety of static pressure specifications could meet diversified static pressure demand, causes the versatility of product very poor.
In addition, in the air-duct-type air-conditioner use procedure, it is blown to a plurality of rooms (zone) by airduct, if certain room (zone) do not used for a long time, need to be closed air outlet to reach energy-conservation effect.And close the static pressure that certain air outlet just is equivalent to increase airduct, because the static pressure of traditional air-cooled ducted air conditioner is fixed, now air-conditioning air volume must diminish, and can affect the normal operation of unit.
Automatic identifying method and the system thereof of a patent No. zl200910017160.6 static pressure of air duct type air conditioning indoor machine, by working control voltage
and rotating speed feeds back to judge the duty of DC fan motor, to implement pre-the interference, control, the static pressure that changes indoor apparatus of air conditioner is set and makes air-conditioning enter normal operating conditions.Thereby, realize preferably the static pressure function of identification automatically, the static pressure that solves engineering site is regulated problem.
In the situation that the 220V stabilized input voltage, according to above-mentioned patented method, is controlled result very accurate, the output static pressure error is less than 10%, meets the requirements; But in actual use, line voltage is not stable 220V, but there will be the labile state of fluctuation up and down, in this case, the control result of above-mentioned patented method there will be relatively large deviation, undesirable.
Therefore, the static pressure that how to solve the automatic identification of the static pressure of air duct type air conditioning indoor machine in the voltage ripple of power network situation and engineering site is regulated, and becomes wind pipe type indoor set air-conditioning and realizes product and model generalization problem demanding prompt solution.
Summary of the invention
The deficiency existed for prior art, technical problem to be solved by this invention is, a kind of automatic static pressure recognition method and system of air duct type air conditioning indoor machine reactance voltage fluctuation are provided, can be in the voltage ripple of power network situation, realize preferably the automatic identification of static pressure of air duct type air conditioning indoor machine and the static pressure adjusting of engineering site, effectively improve stability and the operational efficiency of system.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is that a kind of automatic static pressure recognition method of air duct type air conditioning indoor machine reactance voltage fluctuation comprises the following steps:
Step 1: the working control voltage VSP that obtains DC fan motor
actual measurementwith default control voltage VSP
defaultand the deviation threshold of VSP, and to working control voltage VSP
actual measurementwith default control voltage VSP
defaultcompare, judge whether to exceed threshold range;
Step 2: in the situation that described comparative result exceeds threshold range, by temporary transient setting VSP value, also detect over time the rotating speed of electric motor fan, determine the static pressure gear that this rotating speed is corresponding and further revise control parameter corresponding to this static pressure gear; And
Step 3: according to above-mentioned control parameter, DC fan motor is controlled,
Before step 1, at first carry out the preposition program of voltage detecting balance, comprise the steps:
(1) obtain the actual measurement DC voltage Vdc after the line voltage rectification
actual measurement, and original DC voltage Vdc before actual measurement
original;
(2) will survey DC voltage Vdc
actual measurementwith original DC voltage Vdc
originalcompare, judge whether to exceed threshold range;
(3) in the situation that described comparative result exceeds threshold range, calculate the actual value of VSP adjusted coefficient K, in the situation that described comparative result does not exceed threshold range, acquiescence VSP adjusted coefficient K=1;
(4) according to above-mentioned VSP adjusted coefficient K, VSP is carried out to balance of voltage Correction and Control.
The automatic static pressure recognition method of above-mentioned air duct type air conditioning indoor machine reactance voltage fluctuation, in the preposition program of voltage detecting balance, the threshold range in step (2) is | Vdc
original-Vdc
actual measurement|>10;
The automatic static pressure recognition method of above-mentioned air duct type air conditioning indoor machine reactance voltage fluctuation, in the preposition program of voltage detecting balance, in step (3), in the situation that described comparative result exceeds threshold range, K=Vdc
actual measurement/ Vdc
original.
The automatic static pressure recognition method of above-mentioned air duct type air conditioning indoor machine reactance voltage fluctuation, in the preposition program of voltage detecting balance, in step (4), it is that VSP is multiplied by that VSP is carried out to balance of voltage Correction and Control
after, apply in subsequent step and go.
A kind of static pressure automatic recognition system of air duct type air conditioning indoor machine reactance voltage fluctuation comprises:
Memory module, be used for storing the working control voltage VSP of DC fan motor
actual measurement, default control voltage VSP
default, the corresponding table of control parameter, the rotating speed under certain voltage and static pressure gear controlled of deviation threshold, system of VSP and rotating speed of target and the corresponding VSP relation table under different static pressure shelves;
The VSP parameter acquisition module, obtain the working control voltage VSP of DC fan motor from memory module
actual measurementwith default control voltage VSP
defaultand the deviation threshold of VSP;
The threshold value comparison module, to working control voltage VSP
actual measurementwith default control voltage VSP
defaultcompare, judge whether to exceed threshold range;
The VSP setting module, when the comparative result of threshold value comparison module exceeds threshold range, temporarily set the VSP value;
DC fan motor, receive the VSP value of VSP setting module setting and turned round under this value;
The rotating speed detection module, after a period of time, detected the rotating speed of DC fan motor;
The static pressure determination module, the corresponding table of rotating speed in the rotating speed detected according to the rotating speed detection module and memory module under certain voltage and static pressure gear is determined corresponding static pressure gear, and further determines control parameter that this static pressure gear is corresponding and the control parameter of the system control of memory module is modified according to the rotating speed of target under different static pressure shelves in memory module and corresponding VSP relation table;
System control module, controlled the system each several part according to the control parameter in memory module; And
The static pressure rechecking module, again detected the rotating speed of DC fan motor, and the static pressure gear of system rechecked by the rotating speed detection module, then the result of rechecking is sent to the control parameter of system control module to judge whether that the system that reset is controlled;
It also comprises the voltage detecting balance module, before the VSP parameter acquisition module is obtained data from memory module, first by voltage sampling circuit, obtains the actual measurement DC voltage Vdc after the line voltage rectification
actual measurementwith the original DC voltage Vdc before actual measurement
original, and carry out the preposition program of voltage detecting balance.
The present invention is by original static pressure of air duct type air conditioning indoor machine automatic identifying method and system thereof, increase VSP adjusted coefficient K and voltage detecting balance module, make in voltage ripple of power network, still can realize preferably the automatic identification of static pressure of air duct type air conditioning indoor machine and the static pressure adjusting of engineering site, ability and the adaptability of system balancing voltage pulsation have been strengthened, facilitate on-the-spot mounting design, and improved stability and the operational efficiency of system.
The accompanying drawing explanation
Fig. 1 is modulation rate M and VSP graph of relation;
Fig. 2 is system module graph of a relation of the present invention;
Fig. 3 is static pressure identification process figure of the present invention.
The specific embodiment
As shown in Figure 1, modulation rate M and control voltage VSP relation in direct ratio, become the 1/K in specified situation by controlling voltage VSP, can guarantee that output speed is constant.
Single-chip microcomputer in electric-controlled box is changed the exact value of obtaining line voltage by AD, should be 220V alternating current gained DC voltage Vdc=310V after the silicon bridge rectifying and wave-filtering under normal circumstances, when voltage ripple of power network, after corresponding rectification, DC voltage Vdc will change; According to line voltage, Vu is constant, and the output speed of the DC current of the employing TB6551FG of Toshiba driving chip, with regard to constant rule, utilizes the computing formula of two-phase modulation lines voltage, as follows:
Known: when voltage ripple of power network, if Vdc becomes K times of normal value, so modulation rate M is become to 1/K, line voltage Vu is constant, and final output speed also can remain unchanged; Modulation rate M and control voltage VSP relation in direct ratio, become the 1/K in specified situation by controlling voltage VSP, can guarantee that output speed is constant.
As shown in Figure 2, automatic recognition system comprises voltage detecting balance module 101, memory module 214, VSP parameter acquisition module 206, threshold value comparison module 208, VSP setting module 210, DC fan motor 200, rotating speed detection module 202, static pressure determination module 212, static pressure rechecking module 216 and system control module 204 in the present embodiment.
Voltage detecting balance module 101, before VSP parameter acquisition module 206 is obtained data from memory module 214, first obtains the actual measurement DC voltage Vdc after the line voltage rectification by voltage sampling circuit
actual measurementwith the original DC voltage Vdc before actual measurement
original; And carry out the preposition program of voltage detecting balance.
VSP parameter acquisition module 206 is obtained the working control voltage VSP of DC fan motor 200 from memory module 214
actual measurementwith default control voltage VSP
defaultand the deviation threshold of VSP.
208 couples of working control voltage VSP of threshold value comparison module
actual measurementwith default control voltage VSP
defaultcompare, judge whether to exceed threshold range.
When VSP setting module 210 exceeds threshold range at the comparative result of threshold value comparison module 208, temporarily set the VSP value.
DC fan motor 200 receives the VSP value of VSP setting module 210 settings and is turned round under this value.
The rotating speed detection module is after 202 a period of times, and the rotating speed of DC fan motor 200 is detected.
The corresponding table of rotating speed in the rotating speed that static pressure determination module 212 detects according to rotating speed detection module 202 and memory module 214 under certain voltage and static pressure gear is determined corresponding static pressure gear, and further determines control parameter that this static pressure gear is corresponding and the control parameter of the system control of memory module 214 is modified according to the rotating speed of target under different static pressure shelves in memory module 214 and corresponding VSP relation table.
Static pressure rechecking module 216 is detected the rotating speed of DC fan motor 200 again by the rotating speed detection module, and the static pressure gear of system is rechecked, then the result of rechecking is sent to the control parameter of system control module 204 to judge whether that the system that reset is controlled.
System control module 204 is controlled the system each several part according to the control parameter in memory module 214.
Said system control module 204 adopts single-chip microcomputer to be controlled, and/or above-mentioned VSP setting module 210, by integrated its VSP set-up function of single-chip microcomputer, is also that system control module 204 has comprised VSP setting module 210.
Above-mentioned memory module 214 is EEPROM, and/or on above-mentioned rotating speed detection module 202 employing Hall IC assistant SCM, interruption and timer detect the rotating speed of motor.
In above-mentioned threshold value comparison module 208, to working control voltage VSP
actual measurementwith default control voltage VSP
defaultcompare and judge whether to exceed threshold range, it relatively adopts the mode of difference, and the deviation threshold of VSP is also difference threshold.
As shown in Figure 3, the identification process of the present embodiment.
Step 502, identifying starts automatically.
Step 503, obtain the actual measurement DC voltage Vdc after the line voltage rectification
actual measurementwith the original DC voltage Vdc before actual measurement
original;
Step 505, will survey DC voltage Vdc
actual measurementwith original DC voltage Vdc
originalcompare, judge whether to exceed threshold range, that is: | Vdc
original-Vdc
actual measurement|>10;
Step 507, in the situation that described comparative result exceeds threshold range, calculate the actual value K=Vdc of VSP adjusted coefficient K
actual measurement/ Vdc
original, in the situation that described comparative result does not exceed threshold range, acquiescence VSP adjusted coefficient K=1;
Step 509, according to above-mentioned calculating gained VSP adjusted coefficient K, carry out balance of voltage Correction and Control to VSP, that is: VSP is multiplied by
later institute's value, apply in subsequent step and go.
Step 504 reads the deviation threshold of Single-chip Controlling voltage and VSP from EEPROM.
Step 506, compare the Single-chip Controlling voltage read and default VSP, and judge whether to exceed threshold range.
If do not exceed threshold range, enter step 508, do not change the control parameter of DC fan motor, then enter step 524 and finish this identifying;
If exceed threshold range, enter step 510, setting temporarily VSP is a steady state value, its value is 4.8V.
Step 512, after a bit of time, detect the rotating speed of electric motor fan.
Step 514 is searched rotating speed and the corresponding table of static pressure gear under certain voltage in EEPROM, finds the static pressure gear that this rotating speed is corresponding.
Step 516 is searched rotating speed of target and corresponding VSP relation table under different static pressure shelves in EEPROM, finds the static pressure gear parameter under this static pressure gear, then revises the control parameter of control system module in EEPROM.
Step 518, according to this parameter, controlled DC fan motor.
Step 520, detect the rotating speed of DC fan motor again, and relatively in EEPROM, the control parameter of control system module is rechecked the static pressure of system.
Step 522, rechecked DC fan motor, judges whether it is in normal operating conditions.
If the normal operating conditions of not meeting, return to step 504, the static pressure of system is re-started to identification;
If meet normal operating conditions, enter step 524, finish whole identifying.
Further, more than summary, be not difficult to obtain automatic identifying method of the present invention and comprise the following steps:
One, the preposition program of voltage detecting balance:
(1) obtain the actual measurement DC voltage Vdc after the line voltage rectification
actual measurementwith the original DC voltage Vdc before actual measurement
original;
(2) will survey DC voltage Vdc
actual measurementwith original DC voltage Vdc
originalcompare, judge whether to exceed threshold range;
(3) in the situation that described comparative result exceeds threshold range, calculate the actual value of VSP adjusted coefficient K, in the situation that described comparative result does not exceed threshold range, acquiescence VSP adjusted coefficient K=1;
(4) according to above-mentioned VSP adjusted coefficient K, VSP is carried out to balance of voltage Correction and Control.
Wherein, the threshold range in step (2) is | Vdc
original-Vdc
actual measurement|>10;
Wherein, in step (3), in the situation that described comparative result exceeds threshold range, K=Vdc
actual measurement/ Vdc
original.
Wherein, in step (4), to VSP carry out balance of voltage Correction and Control be VSP is multiplied by adjusted coefficient K after, apply in subsequent step and go.
Two, step 1: the working control voltage VSP that obtains DC fan motor
actual measurementwith default control voltage VSP
defaultand the deviation threshold of VSP, and to working control voltage VSP
actual measurementwith default control voltage VSP
defaultcompare, judge whether to exceed threshold range;
Three, step 2: in the situation that described comparative result exceeds threshold range, by temporary transient setting VSP value, also detect over time the rotating speed of electric motor fan, determine the static pressure gear that this rotating speed is corresponding and further revise control parameter corresponding to this static pressure gear; And
Four, step 3: according to above-mentioned control parameter, DC fan motor is controlled.
Next take certain type as example, lift the automatic static pressure recognition method that an example illustrates reactance voltage fluctuation of the present invention.
One, the preposition program of voltage detecting balance:
(1) obtain the actual measurement DC voltage Vdc after the line voltage rectification
actual measurement=280V(input ac voltage 198V) with the actual measurement before original DC voltage Vdc
original=310V(input ac voltage 220V);
(2) will survey DC voltage Vdc
actual measurementwith original DC voltage Vdc
originalcompare, | 310-280|=30>10;
(3) comparative result exceeds threshold range, calculates the actual value of VSP adjusted coefficient K, K=Vdc
actual measurement/ Vdc
original=280/310=0.9;
(4) according to above-mentioned VSP adjusted coefficient K=0.9, VSP is carried out to balance of voltage Correction and Control, by VSP *
=VSP *
=VSP * 1.11 apply in subsequent step to be gone.
Two, suppose that current setting static pressure state is 85Pa, 1157 rev/mins.VSP measured value VSP now
actual measurementfor 4.9V.As shown in Table 2, default control voltage VSP
defaultshould be 4.42V.Error is greater than 0.2V, need to reset the static pressure gear, and process is as follows:
1. set temporarily VSP(the Vsp here and refer to VSP
default) be steady state value 4.8V * 1.11, waited for for 5 seconds.
2.5 recording the rotating speed of motor after second is 1115 rev/mins.
3. known according to table 1, correct static pressure gear should be the 30Pa shelves, and rotating speed of target should be 850 rev/mins.
4. correct static pressure state is write to EEPROM, that is: 850 rev/mins, 30Pa.
5. enter the common control of motor.
6. again detecting rotating speed is 850, VSP measured value VSP
actual measurementfor 3.2V * 1.11, default control voltage VSP
defaultshould be 3.2V * 1.11.Illustrative system is in normal operating conditions.
?
the form of judgement static pressure shelves when table 1:VSP is set as 4.8V
| Rotating speed (rev/min) | 1050 | 1080 | 1115 | 1145 | 1175 | 1200 |
| Static pressure (Pa) | 0 | 15 | 30 | 50 | 70 | 90 |
table 2: the rotating speed of target of different static pressure shelves and corresponding VSP
| Static pressure (Pa) | 0 | 15 | 30 | 50 | 70 | 85 | 90 |
| Corresponding rotating speed | 700 | 780 | 850 | 1006 | 1100 | 1157 | 1200 |
| Corresponding VSP(V) | 2.5 | 2.9 | 3.2 | 3.9 | 4.3 | 4.42 | 4.8 |
Under different air channels and input ac voltage parameter, the present invention and existing methodical error information detection comparative result, see the following form:
?
the contrast of table 3 actual measurement static pressure error
Annotate 1: the error range that can allow is ± 10%
Annotate 2: normal voltage is 220v, and voltage ripple of power network is generally in ± 10%, and the voltage of the input AC that therefore actual measurement is selected is respectively 198v, 220v, tri-kinds of situations of 242v.
As shown in Table 3, existing method is stablized under the condition of input ac voltage at 220v, and static pressure error is little, and result is accurate, meets service requirement.But, in the situation that voltage pulsation, existing methodical static pressure error is high, sometimes even surpasses 30%, this is not allowed to, and can't meet the air conditioner service requirement.And the present invention is by now, on methodical basis, having increased adjusted coefficient K and voltage detecting balance module, active balance the impact that brings of voltage pulsation, static pressure error maintains 3% left and right, reaches service requirement fully.Make in voltage ripple of power network, still can realize preferably the automatic identification of static pressure of air duct type air conditioning indoor machine and the static pressure adjusting of engineering site, ability and the adaptability of system balancing voltage pulsation have been strengthened, facilitate on-the-spot mounting design, and improved stability and the operational efficiency of system.
The above implementation that specific descriptions of the present invention is intended to illustrate specific embodiments, can not be interpreted as it is limitation of the present invention.Those of ordinary skills, under instruction of the present invention, can make various variants, within these variants all should be included in design of the present invention on the basis of the embodiment described in detail.The present invention's scope required for protection is only limited by described claims.
Claims (1)
1. the automatic static pressure recognition method of air duct type air conditioning indoor machine reactance voltage fluctuation comprises the following steps:
Step 1: the working control voltage VSP that obtains DC fan motor
actual measurementwith default control voltage VSP
defaultand the deviation threshold of VSP, and to working control voltage VSP
actual measurementwith default control voltage VSP
defaultcompare, judge whether to exceed threshold range;
Step 2: in the situation that described comparative result exceeds threshold range, by temporary transient setting VSP value, also detect over time the rotating speed of electric motor fan, determine the static pressure gear that this rotating speed is corresponding and further revise control parameter corresponding to this static pressure gear; And
Step 3: according to above-mentioned control parameter, DC fan motor is controlled,
It is characterized in that:
Before step 1, at first carry out the preposition program of voltage detecting balance, comprise the steps:
(1) obtain the actual measurement DC voltage Vdc after the line voltage rectification
actual measurementwith the original DC voltage Vdc before actual measurement
original;
(2) will survey DC voltage Vdc
actual measurementwith original DC voltage Vdc
originalcompare, judge whether to exceed threshold range, threshold range is | Vdc
original-vdc
actual measurement|>10;
(3) in the situation that described comparative result exceeds threshold range, calculate the actual value of VSP adjusted coefficient K, in the situation that described comparative result does not exceed threshold range, K=Vdc
actual measurement/ Vdc
original, acquiescence VSP adjusted coefficient K=1;
(4) according to above-mentioned VSP adjusted coefficient K, VSP is carried out to balance of voltage Correction and Control, VSP is multiplied by
after, apply in subsequent step and go.
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