CN102741619B - Ventilation device - Google Patents
Ventilation device Download PDFInfo
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- CN102741619B CN102741619B CN201080062870.1A CN201080062870A CN102741619B CN 102741619 B CN102741619 B CN 102741619B CN 201080062870 A CN201080062870 A CN 201080062870A CN 102741619 B CN102741619 B CN 102741619B
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- Prior art keywords
- motor
- current
- value
- air interchanger
- detecting part
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/60—Energy consumption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Disclosed is ventilation device wherein the air volume can be varied, and which is provided with a DC motor for driving blades, and a control circuit for controlling the DC motor. The control circuit is provided with a first current detection unit for detecting the current applied to the DC motor; a rotation speed detection unit for detecting the rotation speed of the DC motor; and a control unit for controlling the DC motor on the basis of the rotation speed detected by the rotation speed detection unit and the current detected by the first current detection unit. The current detection unit is provided with a plurality of low resistors, uses the partial voltage amounts of the low resistors to detect the motor current, and finds a ventilation air volume from the rotation speed detected by the rotation speed detection unit and the current detected by the first current detection unit.
Description
Technical field
The present invention relates to and independently often carry out indoor ventilation to obtain the air interchanger of set air quantity with the impact of the length of pipeline, outside blast.
background technology
In the prior art, this air interchanger possesses: the ventilation fan main body 103 of casing shape, the motor 101 arranged in ventilation fan main body 103 inside, the blade 102 driven by motor 101.Ventilation fan main body 103 is arranged on ceiling portion 104.In addition, this air interchanger possesses: Rotating speed measring portion 105, and it detects the rotating speed of motor 101; With current detecting part 106, it detects the electric current flow through in motor.The rotating speed that this air interchanger detects based on Rotating speed measring portion 105 and the electric current that current detecting part 106 detects, control motor 101.And then the electric current that the rotating speed detected according to Rotating speed measring portion 105 and current detecting part 106 detect, obtains the total ventilation air quantity carrying out taking a breath during specified period.That obtains air quantity after comparing the target total ventilation air quantity of the total ventilation air quantity obtained and specified period crosses many parts or insufficient section, become according to the total ventilation air quantity during next cycle and on target total ventilation air quantity, to be added this to cross many parts or insufficient section and the mode of value that obtains, control the ventilation air quantity during next cycle.This control is carried out by each cycle.
In this existing air interchanger, the motor of the driving of driven vane uses DC motor mostly, and is in most cases set as by air quantity multistage (such as rapidly, strong, weak).When the air quantity of air interchanger is set as multistage, such as, be 100m in air quantity region
3/ h ~ 400m
3boiler pressure control is carried out in the scope that/h is so very wide.In order to carry out Boiler pressure control and utilize the electric current-rotating speed flow through in motor to carry out Boiler pressure control to make air quantity constant in very wide scope, need more precisely to detect electric current.
Prior art document
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2004-340490 publication
summary of the invention
The invention provides a kind of air interchanger, due to the electric current flow through in motor can be detected accurately, even if the air quantity that therefore air interchanger possesses very wide scope also can make air quantity constant.
Air interchanger of the present invention is the air interchanger that can change air quantity, possesses the DC motor of driven vane and the control circuit of control DC motor.Control circuit possesses: the 1st current detecting part, and it detects the electric current flow through in DC motor; Rotating speed measring portion, it detects the rotating speed of DC motor; And control part, the electric current control DC motor that its rotating speed based on the detection of Rotating speed measring portion and the 1st current detecting part detect.1st current detecting part possesses multiple low resistance device, utilizes low-resistance partial pressure value to detect motor current, and the electric current that the rotating speed detected according to Rotating speed measring portion and the 1st current detecting part detect obtains ventilation air quantity.
Accompanying drawing explanation
Fig. 1 is the installment state figure of the air interchanger of embodiments of the present invention 1.
Fig. 2 is the installation diagram representing the state air interchanger of embodiments of the present invention 1 being installed on ceiling.
Fig. 3 is the block diagram of the structure of the control circuit of the air interchanger representing embodiments of the present invention 1.
Fig. 4 is the structure chart of the current detecting part of the air interchanger of embodiments of the present invention 1.
Fig. 5 is static pressure (Pa)-ventilation air quantity (Q) performance diagram of the air interchanger of embodiments of the present invention 1.
Fig. 6 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 1.
Fig. 7 is the structure chart of the current detecting part of embodiments of the present invention 2.
Fig. 8 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 2.
Fig. 9 is the block diagram of the structure of the control circuit representing embodiments of the present invention 3.
Figure 10 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 3.
Figure 11 is the air interchanger installation diagram of embodiments of the present invention 4.
Figure 12 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 4.
Figure 13 is the structure chart of the current detecting part of the air interchanger of embodiments of the present invention 5.
Figure 14 is the figure of the electric current linear correction value of the air interchanger representing embodiments of the present invention 5 and the relation of electric current.
Figure 15 represents that the current threshold to the air interchanger of embodiments of the present invention 5 arranges the structure chart of difference.
Figure 16 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 5.
Figure 17 is the block diagram of the structure of the control circuit representing embodiments of the present invention 5.
Detailed description of the invention
Below, with reference to Fig. 1 ~ Figure 17, embodiments of the present invention are described.
(embodiment 1)
As an example of air interchanger of the present invention, be described for the air interchanger be arranged on the ceiling in building.
As shown in Figure 1 and Figure 2, the main body 3 of air interchanger be arranged on such as indoor 1 ceiling in 2.In the below of main body 3, suction inlet 3a is set.Arrange adapter 4 in the side of main body 3, adapter 4 is connected with one end of discharge duct 5.The other end of discharge duct 5 is connected with the exhaust outlet 6 of wall disposed in the interior.By above structure, the air sucked from suction inlet 3a is discharged to air from exhaust outlet 6 by discharge duct 5.
The DC motor 8 possessing blade 7 in main body 3 inside, blade 7 is rotated.The skylight 9 with blow vent covering this suction inlet 3a is possessed in suction inlet 3a.
In addition, the control circuit 10 of DC motor 8 is driven to be configured in the side, ceiling face of the main body 3 of air interchanger.Switch 11 (switch that one is formed) is configured on indoor wall, is connected with the main body 3 of air interchanger.By user's change-over switch 11, thus carry out the on/off of source power supply or the switching of fan gear (fan notch).
Fig. 3 is the block diagram of the structure of the control circuit 10 of the main body 3 representing air interchanger.In figure 3, source power supply 12 is connected with rectification circuit 13.The rectification circuit 13 thus smmothing capacitor 13a that form DC voltage smoothing with to voltage is connected.Smmothing capacitor 13a is connected in parallel with the voltage detection department 14 and DC motor 8 detecting DC voltage.Smmothing capacitor 13a is also connected with switching power circuit 15 (such as AC-DC converter).
The control circuit of DC motor 8 is built-in control DC motor 8.Control circuit possesses: the control driver IC 8a of DC Motor Control; Detect the position-detection sensor of the rotor-position of DC motor 8, i.e. Hall element 18b; Carry out the drive circuit 8b of the energising of the stator winding of DC motor 8; With the three-phase windings (not shown) as described stator winding.The control ground wire of driver IC 8a is connected jointly with the ground wire of drive circuit 8b.Thus, the electric current that ground wire (GA) effluent of DC motor 8 is crossed become flow through in control driver IC 8a electric current, i.e. DC motor drive current, be exactly total current with the electric current flow to by drive circuit 8b in three-phase windings, the summation that namely flows through the electric current of motor self.
The voltage (such as+15V) that switching power circuit 15 exports control driver IC 8a and the voltage (such as+5V) that control part 16 (such as microcomputer) is worked.Near switching power circuit 15, possesses the temperature detecting part 17 of the temperature for measuring switching power circuit 15.The temperature measured by temperature detecting part 17 is input to control part 16.In addition, the current detecting part 18 (the 1st current detecting part) that the electric current flowing through DC motor 8 is detected is possessed.Current detecting part 18 detects the electric current flowing to the ground wire (GA) of DC motor 8, and inputs to control part 16.
Control signal VSP, based on the electric current detected by current detecting part 18, is exported to DC motor 8 by control part 16.DC motor 8 changes applying voltage according to the magnitude of voltage (motor instructed voltage) of control signal VSP.
Control signal VSP exports pulse from control part 16, and by smmothing capacitor 18a to value smoothingization exported, and the DC voltage after smoothing is put on DC motor 8.Smmothing capacitor 18a is connected with the ground wire (GA) of DC motor 8.Further, smmothing capacitor 18a is that benchmark is smoothing to control signal VSP with the current potential of this ground wire (GA).
When applying the voltage of control signal VSP to DC motor 8, driven drive circuit 8b by control driver IC 8a, electric current flows through three-phase windings.When electric current flows through three-phase windings, the rotor of DC motor 8 can rotate.Such as, by the rotation of Hall element 18b detection rotor.Further, Hall element 18b carries out the output corresponding to the rotation of DC motor 8 to Rotating speed measring portion 19.Thus, the rotating speed of DC motor 8 can detect in Rotating speed measring portion 19.
In addition, obtain in advance in control part 16 in the relation of electric current-rotating speed when making static pressure be changed to Pmax from P0 in air quantity of taking a breath, and prestore as tables of data (not shown).
Fig. 4 is the figure of the structure representing current detecting part 18.In the diagram, current detecting part 18 is made up of the low resistance device of 1.5 below Ω.On the ground wire (GA) of DC motor 8, such as arranged in series 2 low resistance device 20a, are connected to the ground wire of switching power circuit 15 by the side of the low resistance device 20a of arranged in series.In addition, the 1st resistor 20b (low resistance device) and the 2nd resistor 20c (low resistance device) is set according to the mode that freely can be connected in parallel with low resistance device 20a.These the 1st resistor 20b or the 2nd resistor 20c are configured to freely be connected with low resistance device 20a by the 1st switching part 20d or the 2nd switching part 20e respectively.By switching these the 1st switching part 20d as low resistance switching part and the 2nd switching part 20e, can the resistance value of switch current test section 18.
Further, the current potential of the ground wire (GA) of DC motor 8 is amplified by amplifier 21 (such as operational amplifier).
In addition, temperature detecting part 17 is such as made up of thermistor.The parts that when so-called thermistor is to provide heat, resistance value changes.
In addition, as shown in Figure 3, to the value that control part 16 (microcomputer) input is detected by temperature detecting part 17, current detecting part 18, Rotating speed measring portion 19, voltage detection department 14.The program can carrying out series of actions based on the detected value of inputted each test section is written with in control part 16.
That is, when current detecting part 18 detects the electric current of DC motor 8, switch the 1st switching part 20d and the 2nd switching part 20e as required and detect electric current.In structure as in the previous describe such, be supplied to the magnitude of voltage of the control signal VSP of DC motor 8 for reference connection with the ground wire of DC motor 8 (GA).Therefore, if switch the 1st switching part 20d and the 2nd switching part 20e and be in the state being connected to the 1st resistor 20b, then the resistance value of current detecting part 18 is changing into 1 Ω from 3 Ω.Further, the ground levels of DC motor 8 changes relative to the ground levels of control part 16, actually wants the magnitude of voltage of the control signal VSP provided to change.Therefore, in control part 16, be also written with the program of the correction carrying out control signal VSP.
Utilize Fig. 5 and Fig. 6 that the concrete action of the air interchanger of the present embodiment of above-mentioned this structure is described.Fig. 5 is static pressure (Pa)-ventilation air quantity (m
3/ h) performance diagram, Fig. 6 is the flow chart of the motion of the air interchanger representing present embodiment.
Such as, as shown in Figure 6, when by air interchanger user console switch 11, when making connect source power supply 12 and set weak gear as fan gear, the main body 3 of air interchanger is powered, and applies power supply to control circuit 10.As shown in Figure 5, when setting weak gear, select 100m as air quantity
3/ h.
In addition, as shown in Figure 6, the temperature detected by temperature detecting part 17 is input to control part 16.When setting fan gear, control part 16 reliably works to make DC motor 8, is in holding state in 3 seconds after applying power supply.Afterwards, the control signal VSP (hereinafter referred to as STCP starting compensatory VSP) as STCP starting compensatory value is put on DC motor 8.Because in the situations such as low temperature, DC motor 8 likely cannot start, even if the therefore preferred STCP starting compensatory VSP value of selecting low temperature etc. that DC motor 8 also can be made to work.
At this, so-called holding state refers to that control part 16 does not drive DC motor 8 but the state of former state placement at once.
After applying power supply, DC motor 8 is made to maintain the reason of the holding state during 3 seconds as follows.The air interchanger of present embodiment is configured to the on/off directly can being carried out source power supply 12 by switch 11.Therefore, when air interchanger user has carried out on/off/connection to connect the power supply of air interchanger continuously, even if power supply is in the state of cut-out, DC motor 8 also can rotate because of inertia sometimes.When switching on power in this condition, because the rotation by motor can produce voltage, therefore can flow through regenerative current, thus likely can damage element.In order to prevent this situation, in order to wait for that DC motor 8 stops completely, be provided with holding state.
When being transfused to STCP starting compensatory VSP in DC motor 8, flow through electric current in the three-phase windings of DC motor 8, DC motor 8 rotates.The electric current detected by current detecting part 18 now, the rotating speed detected by Rotating speed measring portion 19, the value of voltage detected by voltage detection department 14 are input to control part 16.
Now, the 1st switching part 20d, the 2nd switching part 20e of current detecting part 18 are in open-circuit condition.
Next, when the value detected by current detecting part 18 not yet reaches such as 3.0V, control part 16 makes the 1st switching part 20d and the 2nd switching part 20e keep original state, compares the detected value of the current detecting part 18 be input in control part 16 and the data form be stored in advance in control part 16.Its result, when be judged as DC motor 8 rotor rotating speed higher than be used for the rotating speed of regulation of the ventilation air quantity obtaining regulation, control part 16 improved DUTY by every 3 seconds.This operation repeatedly, the speed discrepancy between the rotating speed specified disappears, control part 16 is judged as YES the ventilation air quantity of regulation, stops the change of DUTY.
In addition, such as, in the impact because of wind outside etc., when canal electrical resistance rises, rotating speed can decline, and electric current can increase.Such as, the above results be the value that detected by current detecting part 18 when more than 3.0V, make the 1st switching part 20d conducting (ON).Thus, the 1st resistor 20b and low resistance device 20a is connected in parallel.That is, the resistance value of current detecting part 18 is 1 Ω.When making the 1st switching part 20d conducting, when the value detected by current detecting part 18 does not reach 3.0V, maintain original state.Further, as described above, the detected value of the current detecting part 18 be input in control part 16 is compared with the data form be stored in advance in control part 16.So, when the rotating speed of the rotor of DC motor 8 is higher or lower than the rotating speed specified, DUTY was changed by every 3 seconds.And repeatedly carry out this operation, thus when the rotating speed relative to regulation does not exist speed discrepancy, control part 16 is judged as the ventilation air quantity obtaining specifying, stops the change of DUTY.
On the other hand, when making the 1st switching part 20d conducting, the value detected by current detecting part 18, when more than 3.0V, makes the 2nd switching part 20e conducting further.Thus, the 2nd resistor 20c and low resistance device 20a and the 1st resistor 20b is connected in parallel.That is, the resistance value of current detecting part 18 is 0.6 Ω.Further, as described above, the detected value of the current detecting part 18 be input in control part 16 and the data form be stored in advance in control part 16 are compared.So, when the rotating speed of the rotor of DC motor 8 is higher or lower than the rotating speed specified, make DUTY by change in every 3 seconds.This operation repeatedly, thus when the rotating speed relative to regulation does not exist speed discrepancy, control part 16 is judged as the ventilation air quantity obtaining specifying, stops the change of DUTY.
As above-mentioned, adjust ventilation air quantity by raising in every 3 seconds or reduction DUTY.Control part 16 possesses the instructed voltage variation portion 200 revised the magnitude of voltage of control signal VSP.As described above, switch the 1st switching part 20d or the 2nd switching part 20e when being connected to the 1st resistor 20b or the 2nd resistor 20c, the magnitude of voltage of instructed voltage variation portion 200 and switching state Correction and Control signal VSP matchingly, and correction value is supplied to DC motor 8.
From the electric current that the current detecting part 18 by DC motor 8 detects, deduct the electric current flowing through control driver IC 8a, calculate the electric current flow through in the three-phase windings of DC motor 8.As shown in Figure 4, the electric current flow through in control driver IC 8a is detected by current detecting part 18c, and detected value is input to control part 16 via amplifier 21.In addition, due to standby current environmentally temperature and the linear change of DC motor 8, therefore deriving temperature correction coefficient according to the temperature detected by temperature detecting part 17, calculating the standby current of DC motor 8 by carrying out temperature adjustmemt.
The air interchanger formed as described above switches the 1st switching part 20d, the 2nd switching part 20e according to the detected value of the electric current flow through in DC motor 8.Thus, the resistance value of switch current test section 18, selects best resistance to carry out current detecting relative to the electric current flow through in DC motor all the time.Thus, due to the electric current flow through in DC motor can be detected accurately, even if when therefore canal electrical resistance changes because of the impact of wind outside etc., air quantity of taking a breath also can be kept consistently.
Moreover although the change of the DUTY recorded in present embodiment is set as three second cycle, also can shorten or extend this cycle makes it variable, also can obtain same effect.
In addition, the switching threshold of the 1st switching part 20d, the 2nd switching part 20e is set 3.0V, but when changing this threshold value, effect is also identical.
In addition, be configured to the number of the 1st switching part 20d, the 2nd switching part 20e and the resistor corresponding with it to set 2, but when the number changing switching part and resistor has carried out adjusting, effect is also identical.
In addition, constituted the electric current detecting method of current detecting part 18 by low resistance changing method, but adopt the method possessing the magnifying power changing unit (not shown) of the magnifying power of switched amplifier 21, also can obtain same effect.
(embodiment 2)
With reference to Fig. 7 ~ Fig. 8, embodiments of the present invention 2 are described.Moreover, omit the description the structural element same with embodiment 1.Fig. 7 is the structure chart of the current detecting part of embodiments of the present invention 2.Fig. 8 is the flow chart of the motion of the air interchanger representing embodiments of the present invention 2.
As shown in Figure 7, the current detecting part 18 of present embodiment replaces the 1st switching part 20d or the 2nd switching part 20e of embodiment 1, and between the ground wire (GA) and the ground wire of switching power circuit 15 of DC motor 8, the multiple low resistance of arranged in series detects electric current.
In addition, identical with embodiment 1, in order to the electric current flow through in detection control driver IC 8a, be configured to possess current detecting part 18c (the 2nd current detecting part) between the power supplying line (+15V) and control driver IC 8a of switching power circuit 15.
In said structure, utilize the flow chart shown in Fig. 8 that the action of the air interchanger of present embodiment is described.
Moreover, for the action identical with embodiment 1, omit the description.Such as, when air interchanger user console switch 11, connect source power supply and when setting weak gear as fan gear, the main body 3 of air interchanger is powered, and applies power supply to control circuit 10.As shown in Figure 8, when setting weak gear, have selected 100m
3the air quantity of/h.
When setting fan gear, control part 16 works to make DC motor 8, provides STCP starting compensatory VSP after power supply applies 3 seconds.When STCP starting compensatory VSP is applied in DC motor 8, the current detecting part 18c of the electric current flow through in detection control driver IC 8a carries out current detecting.The detected value detected by current detecting part 18c is input to control part 16.
Multiple detected values that control part 16 detects from the current detecting part 18 by the electric current detecting DC motor 8 (such as, shown in Fig. 7, be connected in series in 3 low-resistance situations, be the 1st current detection value respectively, the 2nd current detection value, the 3rd current detection value) in select best detected value.According to the difference of the detected value of the detected value selected and current detecting part 18c, calculate the electric current flow through in three-phase windings.
Further, the value and the list data be set in advance in control part 16 being input to control part 16 is compared, calculates the rotating speed of the rotor of DC motor 8.For comparative approach and later control, same with embodiment 1.
From multiple current detection value, select the benchmark of best detected value such as follows.Be applied in the power supply of such as+5V at control part 16, when control part 16 has the resolution ratio of 10 bits, among the multiple detected values detected by current detecting part 18, select to have most the value of resolution ratio.
Such as, when flowing through the electric current of 50mA in DC motor 8, low-resistancely add up to 4.5 Ω, the voltage produced in each low resistance relative to the ground wire of switching power circuit 15 is 0.225V, 0.15V, 0.075V.Now, if the amplifying power of amplifier 21 is set as such as 10 times, then the value inputing to control part 16 is respectively 2.25V, 1.5V, 0.75V.Now, resolution ratio is for full-scale 5V, and 2.25V is the highest, therefore as current detecting part 18 detected value and select 2.25V.
In addition, in the impact etc. because of wind outside, the electric current flow through in DC motor 8 is changing into 100mA from 50mA, by same computational methods, the value inputing to control part 16 is respectively 3.5V, 3.0V, 1.5V.Now, be select can be increased to the 3.5V of 5V as detected value according to resolution ratio originally.But this owing to exceeding the permissible range of input value sometimes according to the characteristic of amplifier, therefore cannot export correct value when the power supply as amplifier is applied with+5V sometimes from amplifier.Therefore, in this case, 3.0V high for resolution ratio second is chosen as the detected value of current detecting part 18.
Because the air interchanger formed as described above can detect the electric current flow through in the three-phase windings of DC motor 8 accurately, even if therefore when canal electrical resistance changes because of the impact of wind outside etc., ventilation air quantity also can be made to keep constant.
In addition, owing to not needing the switching of switch etc. just can detect multiple current value in current detecting part 18, therefore, it is possible to eliminate the ground wire change produced when switching, can eliminate and change by ground wire the noise etc. caused.
Moreover in the present embodiment, what detect from current detecting part 18 flows through the electric current of DC motor 8 electric current (drive current) deducting current detecting part 18c and detect, thus has obtained the electric current flow through in winding.In addition, also temperature detecting part can be possessed near DC motor 8, for detecting the temperature of DC motor 8, and the drive current of DC motor 8 is calculated according to the value detected, this drive current calculated is deducted, to detect the electric current flow through in winding from the detected value of current detecting part 18.In addition, even if utilize Direct Current sensor to detect winding current, also effect same can be obtained.
(embodiment 3)
In embodiment 1,2, describe high accuracy carry out the embodiment that current detecting makes ventilation air quantity keep constant.
In embodiments of the present invention 3, with reference to Fig. 9 ~ Figure 10, illustrating to make ventilation air quantity keep constant accurately further, identifying the energising historical information of air interchanger, be difficult to be subject to the embodiment of the impact caused because of the on/off of power supply.Moreover, omit the description the structural element identical with embodiment 1.
As shown in Figure 9, the control circuit 10 in the air interchanger of present embodiment also possesses: the storage part 22 (not shown) of the on/off of storage inside power supply, the humidity detection unit 23 detecting humidity, secondary cell 24 and diode 201.In control circuit 10, when cutting off the electricity supply, the cathode side of diode 201 is connected with the power supply (+5V side) of control circuit 10, and the anode-side of diode 201 is connected with the side of the positive electrode of secondary cell 24 (such as button cell).In addition, the negative side of secondary cell 24 is connected with ground wire.
In addition, in order to confirm the on/off of source power supply 12, be configured in control circuit 10, possess zero cross detection circuit (not shown).Zero cross detection circuit detects the circuit of alternating voltage by dead-center position.
In said structure, utilize the flow chart shown in Figure 10 that the action of air interchanger is described.
Such as, when air interchanger user console switch 11 is connected source power supply and set weak gear as fan gear, the main body 3 of air interchanger is powered, and applies power supply to control part 16.When being applied with power supply, zero passage detection is input to control part 16, and control part 16 identifies the power supply of input.Humidity detection unit 23 starts to detect humidity, and inputs to control part 16.When control part 16 have input the testing result of humidity, start to control with reference to the list data (not shown) preset.
Value when the in store DC motor 8 of electric current of the DC motor 8 in list data is stablized.Owing to controlling according to mode STCP starting compensatory VSP being supplied to after 3 seconds DC motor 8 applying from power supply, therefore from power supply applies in 3 seconds, DC motor 8 is in holding state.Electric current when detecting holding state by current detecting part 18, and be saved in storage part 22.After applying power supply played for 3 seconds, DC motor 8 starts to rotate, and current detecting part 18 detects the electric current comprising standby current.Therefore, from the standby current be kept at storage part 22, deduct difference and calculate winding current.In addition, using the moment that DC motor 8 starts to rotate as starting point, control part 16 time started counts, and counts the time till being set as disconnection until following power supply and cutting off the energising of DC motor 8.
Afterwards, when air interchanger user console switch 11, when being set as by source power supply disconnecting, zero passage can not be input to control part 16.Therefore, from secondary cell 24 pairs of control part 16 supply powers, start the counting of the time of power remove (OFF), i.e. DC motor 8 break time.
Then, when console switch 11 again and when setting the connection of source power supply, control part 16 carries out following judgement.
First, after the conduction time of DC motor 8 have passed through more than 1 hour, when the break time of DC motor 8 have passed through more than 5 minutes, the impact that control part 16 is judged as not having the temperature of DC motor 8 to rise, do not detect the electric current of holding state, keep original state.
On the other hand, after have passed through more than 1 hour to the conduction time of DC motor 8, the break time of DC motor 8 is (such as lower than 5 minutes) when extremely short, the impact that the temperature that control part 16 is judged as existing DC motor 8 rises, thus again measure standby current and calculate the winding current of DC motor 8.Moreover, now, judge that whether the break time of DC motor 8 is lower than 1 minute, only when lower than 1 minute, can measure standby current again further.
The air interchanger formed as above can also detect humidity, therefore, it is possible to detect the proportion of air, can eliminate the impact relative to humidity.In addition, thermistor is set, thus do not need the temperature of special modifying factor DC motor 8 to rise the change of the standby current caused, also the electric current flow through in the winding of DC motor 8 can be detected accurately, even if when therefore canal electrical resistance creates change because of the impact of wind outside etc., ventilation air quantity also can be made to keep constant.
(embodiment 4)
With reference to Figure 11 ~ Figure 12, embodiment 4 is described.Moreover, omit the description the structural element identical with embodiment 1.
As shown in figure 11, the air interchanger of present embodiment also possesses opening (not shown), so that it is poor to produce differential pressure in discharge duct 5 inside.Be provided with the differential pressure measuring portion 25 arranged in the side of discharge duct 5.The HIGH side pressure introducing port (not shown) in differential pressure measuring portion 25 is arranged in front of the opening of discharge duct 5, LOW side pressure introducing port (not shown) is provided in the rear of the opening of discharge duct 5.Differential pressure measuring portion 25 is connected with the control circuit 10 be arranged in main body 3 via holding wire (not shown).
The structure example in differential pressure measuring portion 25 as in order to detect low ventilation air quantity accurately, and uses differential pressure pick-up (50Pa).Differential pressure pick-up is following parts: forming compression face is the transeptate symmetric construction of silicon, and when being under pressure, diaphragm changes, and electrostatic capacitance changes, and therefore exports the change of electrostatic capacitance to electrically.
Utilize the flow chart shown in Figure 12 so that the action of the air interchanger under said structure to be described.
Air interchanger as in embodiment 1 describe, particularly for the air interchanger using DC motor, be configured to take a breath air quantity with multistage changes.In addition, when changing ventilation air quantity, the electric current flow through in DC motor also changes.
Such as, when using the current detecting part 18 described in embodiment 2 to detect the electric current flowing through 30mA, even if the voltage inputing to control part 16 after amplifying the electric current detected by current detecting part 18 have selected the value of resolution ratio the best, it is only 1.35V, and it is very difficult for therefore controlling air quantity with 1.35V.For this reason, present embodiment is provided with differential pressure measuring portion 25, and with being detected the structure of current value by current detecting part 18.
Such as, when air interchanger user console switch 11, source power supply is connected and when setting weak gear as fan gear, the main body 3 of air interchanger is powered, and applies power supply to control part 16.After being applied with power supply, in during 3 seconds as holding state, control part 16 detects the value in differential pressure measuring portion 25.Although if but DC motor 8 does not have the state rotating be in the value exporting differential pressure test section 25, then because the installment state in differential pressure measuring portion 25 is affected, voltage correction (carrying out adjustment at zero point) is carried out to the output voltage in differential pressure measuring portion 25 in the differential pressure adjustment part (not shown) therefore possessed by control part 16.
The differential pressure pick-up of silicon diaphragm mode can apply weight to diaphragm because of installment state, and as differential pressure signal and export, therefore need to carry out output adjustment.
From applying power supply, after 3 seconds, DC motor 8 starts to rotate, and current detecting part 18 detects the electric current flow through in DC motor 8, and inputs to control part 16.The electric current flow through in DC motor 8 is less (such as at below 30mA), use the value in differential pressure measuring portion 25, with reference to the differential pressure data form preset to start the running of DC motor 8.
In addition, when be subject to wind outside impact or by the gear of switch 11 from weak changing to rapidly, when the ER effect flow through in DC motor 8 must be greater than rated current (such as at more than 30mA), change to the electric current data form preset, continue the running of DC motor 8.
When air quantity of taking a breath is less, electric current is less, is difficult to carry out current detecting, but the air interchanger formed as described above detects differential pressure by differential pressure measuring portion, even if therefore less ventilation air quantity also can detect accurately.
In addition, although detect less ventilation air quantity by differential pressure measuring portion 25, when detecting compared with Wind Volume, likely can exceed the scope of differential pressure and cannot detect.But, due to large electric current can be flow through when larger air quantity, therefore, it is possible to utilize the value measured by current detecting part 18.Like this, when little air quantity and Wind Volume when, the selected object detected respectively, even if thus canal electrical resistance changes because of the impact of wind outside etc. when or gear when being changed by air interchanger user, ventilation air quantity also can be made to keep constant.
(embodiment 5)
With reference to Figure 13 ~ Figure 17, embodiment 5 is described.Moreover, omit the description the structural element identical with embodiment 1.
In embodiment 1, the temperature detecting part 17 of the temperature for measuring switching power circuit 15 has been possessed near switching power circuit 15, but in the present embodiment, replace temperature detecting part 17 as shown in Figure 17, in DC motor 8, possess the temperature detecting part 28 for detecting Hall element temperature.
The input resistance of Hall element is (in non-electromagnetic field, lead-out terminal open circuit time input terminal between resistance) and temperature between relation there is following characteristic: when temperature is lower, resistance value is higher, along with temperature step-down, resistance value is according to 2 curve step-downs.(such as-40 DEG C time: 1800 Ω, 25 DEG C: 240 Ω, 50 DEG C: 100 Ω).
In addition, control part 16 is configured to possess storage part 29, and this storage part 29 is in middle values stored for correcting electronic parts variation such as Nonvolatile memory devices.
As Nonvolatile memory devices, use such as EEPROM.EEPROM is that logical superpotential operation can carry out the deletion of data and the semiconductor storage of rewriting.
The deviation of electronic unit becomes the reason of motor current accuracy of detection decline.Therefore, in order to improve the accuracy of detection of motor current, carry out the accuracy of detection of motor current is brought to the computer power of impact, formed the correction of the resistor of the current detecting part 18 detecting the electric current flow through in DC motor 8.
Correct in the following manner.First, as shown in figure 13, suppose the electric current flowing through such as 100mA between VM-G, the 1st switching part 20d, the 2nd switching part 20e are disconnected.Like this, one of the resistor as current detecting part 18 is corrected and the deviation of the resistance value of the low resistance device 20a be equipped with.Next, make the 1st switching part 20d conducting, carry out the correction of the resistance value of the 1st resistor 20b equally.Finally, make the 2nd switching part 20e also conducting, carry out the correction of the resistance value of the 2nd resistor 20c.The above-mentioned result that these correct is stored in storage part 29 successively.Following illustrative examples is as the conversion method of current value during use low resistance 20a.As shown in figure 17, control part 16 also possesses current value operational part 202, and current value operational part 202 compares the value stored in storage part 29 and the theoretical value obtained by calculating, derives scaled value.(such as, the theoretical value of the resistance of low resistance device 20a should be 3.0 Ω × 100mA=0.3V, but the value that storage part 29 stores is (2.8 Ω × 100mA=) 0.28V.) that is, for the voltage corresponding with the current value that actual measurement obtains, the value utilizing 0.3 ÷ 0.28=1.07 doubly to obtain afterwards carrys out comparable data form, obtains the rotating speed corresponding with electric current.When being connected to the 1st resistor 20b, the 2nd resistor 20c, also to be converted current value by same method.
In addition, as illustrated in embodiment 1, current detecting part 18, when detecting the electric current of DC motor 8, switches the 1st switching part 20d and the 2nd switching part 20e and detects electric current.In such an embodiment, as shown in figure 14, by the detected value of electric current that is input in control part 16 according to the open and-shut mode of the 1st switching part 20d and the 2nd switching part 20e, the relation between the electric current (AD value-electric current) flow through in the AD value (value after analog to digital conversion) that the microcomputer producing 3 stages reads in and current sensing resistor.Thus, by switching the 1st switching part 20d, the 2nd switching part 20e, i.e. low resistance switching part, thus the result obtained in several cases is discrete.Therefore, suitable control cannot be carried out.That is, for an AD value, there are three current values, thus cannot control.Therefore, in the present embodiment, the current value operational part 202 that control part 16 possesses is multiplied by the multiplying power of regulation in the primary data of AD value.Such as, when only reading the magnitude of voltage of low resistance device 20a, 3 times are multiplied by AD value, 4 times are multiplied by when reading and adding the magnitude of voltage of the 1st resistor 20b, be multiplied by 12 times when reading the magnitude of voltage added further after the 2nd resistor 20c, thus discontinuous current detection value is converted into successive value.Thereby, it is possible to make current value and AD value one_to_one corresponding.
Below represent above-mentioned conversion formula.That is, scaled value=(initial AD value) × (multiplying power factor k/ microcomputer AD value resolution ratio (1024)) × (theoretical value (result of calculation)/resistance adjustment AD value).
In addition, in the present embodiment in order to multiple low resistances that convert resistance value is different, as shown in figure 15, difference (differential) is arranged to current threshold.
In addition, while control part 16 confirms the response from the rotating speed of DC motor 8, based on the current value detected by current detecting part 18, control signal VSP is exported to DC motor 8.DC motor 8 changes applying voltage according to the value of control signal VSP.But, although output control signal VSP, when there is no rotating speed response, being judged as in DC motor 8, create some abnormal, all switching parts stopped.
Utilize the action of the air interchanger under the flow chart explanation said structure shown in Figure 16.
Moreover, omit the description the action identical with embodiment 1.
The temperature detected by the temperature detecting part 28 of the temperature detecting Hall element is input to control part 16.From the electric current that the current detecting part 18 by DC motor 8 detects, deduct the electric current flowing through Hall element, thus calculate the electric current flow through in the winding of DC motor 8.According to the detected value of temperature detecting part 28, converse the electric current flow through in Hall element.In addition, the electric current flow through in winding due to DC motor 8 changes because of environment temperature, therefore derive according to the temperature detected by temperature detecting part 28 electric current flowing through Hall element, the Hall element temperature adjustmemt portion (not shown) possessed by control part 16 carries out temperature adjustmemt.
When control signal VSP is inputed to DC motor 8 as STCP starting compensatory value, flow through electric current in the winding of DC motor 8, DC motor 8 rotates.Further, the electric current now detected by current detecting part 18, the rotating speed detected by Rotating speed measring portion 19 are input to control part 16.
In addition, now, when the information of rotating speed is not input to control part 16, is judged as existing extremely, all switch units are all disconnected.
When being transfused to the information of rotating speed in control part 16, current value operational part 202, by said method, according to the value stored in storage part 29 and theoretical value, has been revised by the actual value detected of current detecting part 18, has been calculated scaled value.
When the scaled value based on the value detected by current detecting part 18 does not reach such as 3.0V, the 1st switching part 20d and the 2nd switching part 20e keeps original state.Further, control part 16 is according to data form, and with reference to the rotating speed corresponding with the scaled value of the value detected based on current detecting part 18, the rotating speed of the reality detected with Rotating speed measring portion 19 compares.Result is relatively when being judged as that rotating speed is higher, and control part 16 improved DUTY by every 3 seconds.By this operation repeatedly, when speed discrepancy disappears, be judged as YES regulation ventilation air quantity, stop the change of DUTY.
In addition, such as, when causing canal electrical resistance to rise because of the impact of wind outside etc., rotating speed can decline, and electric current can increase.Such as, when the above results be based on the scaled value of the value detected by current detecting part 18 at more than 3.0V, make the 1st switching part 20d conducting.Thus, the 1st resistor 20b and low resistance device 20a is connected in parallel.That is, the resistance value of current detecting part 18 is 1 Ω.When making the 1st switching part 20d conducting, when scaled value does not reach 3.0V, maintain original state.Further, as described above, the detected value of the current detecting part 18 be input in control part 16 and the data form be stored in advance in control part 16 are compared.Further, when the rotating speed of the rotor of DC motor 8 is higher or lower than regulation rotating speed, DUTY was changed by every 3 seconds.This operation repeatedly, relative to regulation rotating speed, when speed discrepancy disappears, control part 16 is judged as the ventilation air quantity obtaining regulation, stops the change of DUTY.
On the other hand, when making the 1st switching part 20d conducting, when the value detected by current detecting part 18 has exceeded 3.0V, make the 2nd switching part 20e conducting further.Further, as described above, the scaled value of the detected value based on the current detecting part 18 be input in control part 16 and the data form be stored in advance in control part 16 are compared.Further, when the rotating speed of the rotor of DC motor 8 is higher or lower than regulation rotating speed, DUTY was changed by every 3 seconds.Repeatedly carry out this action, relative to regulation rotating speed, when speed discrepancy disappears, control part 16 judges to obtain the ventilation air quantity specified, stops the change of DUTY.
As above-mentioned, adjust ventilation air quantity by raising in every 3 seconds or reduction DUTY.
In addition, under the state of the 2nd switching part 20e conducting, wind outside etc. affect disappearance and static pressure when declining, due to without canal electrical resistance, the electric current therefore flow through in DC motor 8 can decline.Thus, when the scaled value of value detected because electric current declines based on current detecting part 18 is 2.7V, that is, use the current threshold differing 0.3V relative to 3.0V that the 2nd switching part 20e is disconnected.In addition, even if make the 2nd switching part 20e disconnect, but when detected value or more than 3.0V, also the 1st switching part 20d is disconnected.
As above-mentioned, adjust ventilation air quantity by raising in every 3 seconds or reduction DUTY.Control part 16 possesses the instructed voltage variation portion of the magnitude of voltage of Correction and Control signal VSP.As above-mentioned, when being connected to the 1st resistor 20b or the 2nd resistor 20c at switching the 1st switching part 20d or the 2nd switching part 20e, the magnitude of voltage of instructed voltage variation portion and switching state Correction and Control signal VSP matchingly, is supplied to DC motor 8 by correction value.
Air interchanger as constituted above is while the electric current of DC motor 8 is flow through in detection, use the 1st switching part 20d, the 2nd switching part 20e carrys out convert resistance value, all the time select best resistance value relative to electric current, while guaranteeing necessary resolution ratio, carry out current detecting.Therefore, it is possible to detect electric current accurately, even if canal electrical resistance creates change because of the impact of wind outside etc., ventilation air quantity also can be made to keep constant.
(utilizability in industry)
The involved in the present invention air interchanger installed between floors by the impact of canal electrical resistance, outside blast, can not obtain extensive use in the product of air quantity in official hour.
Symbol description
1 is indoor
In 2 ceilings
3 main bodys
4 adapters
5 discharge ducts
6 exhaust outlets
7 blades
8 DC motor
8a control driver IC
8b drive circuit
9 skylights
10 control circuits
11 switches
12 source power supplies
13 rectification circuits
14 voltage detection departments
15 switching power circuits
16 control parts
17 temperature detecting parts
18 current detecting parts
1gc current detecting part
19 Rotating speed measring portions
20a low resistance device
20b the 1st resistor
20c the 2nd resistor
20d the 1st switching part
20e the 2nd switching part
21 amplifiers
22 storage parts
23 humidity detection unit
24 secondary cells
25 differential pressure measuring portions
28 temperature detecting parts
29 storage parts
200 instructed voltage variation portions
201 diodes
202 current value operational parts
Claims (17)
1. an air interchanger, it can change air quantity, and this air interchanger possesses:
DC motor, it drives the blade of air interchanger body interior; With
Control driver IC, it is built in described DC motor, and for controlling described DC motor,
The control circuit of described air interchanger main body possesses:
1st current detecting part, it detects the electric current flow through in described DC motor;
2nd current detecting part, it detects motor drive current that flow through in described control driver IC, that drive described DC motor;
Rotating speed measring portion, it detects the rotating speed of described DC motor; With
Control part, the electric current that its rotating speed detected based on described Rotating speed measring portion, described 1st current detecting part detect and the electric current that described 2nd current detecting part detects, control described DC motor,
Described 1st current detecting part possesses multiple low resistance device, switches described low resistance device to detect the electric current flow through in described DC motor,
The current value calculated according to the rotating speed of described Rotating speed measring portion detection and the electric current deducting described 2nd current detecting part detection from the electric current that described 1st current detecting part detects, obtains ventilation air quantity.
2. air interchanger according to claim 1, wherein,
Described air interchanger possesses the low resistance switching part of the connection that switches described multiple low resistance device/disconnected,
The electric current that described control part detects based on described 1st current detecting part, switches described low resistance switching part.
3. air interchanger according to claim 1, wherein,
Described air interchanger possesses:
Amplifier, it amplifies the ground of described DC motor; With
Magnifying power changing unit, it changes the magnifying power of described amplifier,
The electric current that described control part detects based on described 1st current detecting part, switches described magnifying power changing unit.
4. air interchanger according to claim 1, wherein,
Described air interchanger possesses the voltage detection department detected the voltage putting on described DC motor,
Described ventilation air quantity is obtained based on described rotating speed, described electric current, described voltage.
5. air interchanger according to claim 2, wherein,
Be provided with in described air interchanger: current value operational part, it will become successive value because described low resistance switching part switches the resistance value of described 1st current detecting part and the current detection value that become discontinuous described 1st current detecting part based on the ratio computing of resistance value described in each.
6. air interchanger according to claim 5, wherein,
Described air interchanger possesses: storage part, its using the magnitude of voltage that produces on the two ends of described low resistance device under the state flowing through the current value of regulation in described low resistance device as storing value, be stored in Nonvolatile memory devices after setting up corresponding relation with the current value of described regulation
Described current value operational part compares the magnitude of voltage produced at the two ends of described low resistance device during described DC motor operation and the described storing value stored in described storage part, thus obtains described current value.
7. air interchanger according to claim 2, wherein,
For the current threshold of the resistance value for being switched described 1st current detecting part by described low resistance switching part, difference is set.
8. air interchanger according to claim 2, wherein,
Described air interchanger has: instructed voltage variation portion, and it, when switching the resistance value of described 1st current detecting part by described low resistance switching part, changes the motor instructed voltage to described DC motor.
9. air interchanger according to claim 2, wherein,
All switching parts of described low resistance switching part are turned off when locking described DC motor.
10. air interchanger according to claim 1, wherein,
Described air interchanger possesses differential pressure measuring portion,
When the current value detected by described 1st current detecting part is below setting, the detected value based on described differential pressure measuring portion decides described ventilation air quantity.
11. air interchangers according to claim 10, wherein,
Described air interchanger possesses: differential pressure adjustment part, and it carries out voltage correction to the output voltage under the installment state in differential pressure measuring portion.
12. air interchangers according to claim 4, wherein,
Described control part, according to the difference of the detected value of the detected value of described 1st current detecting part and described 2nd current detecting part, calculates the electric current of the winding flowing through described DC motor.
13. air interchangers according to claim 1, wherein,
Temperature detecting part is possessed in described control circuit inside.
14. air interchangers according to claim 1, wherein,
Temperature detecting part is possessed in described DC motor interior.
15. air interchangers according to claim 14, wherein,
Described air interchanger possesses: Hall element temperature adjustmemt portion, and it measures the temperature of described DC motor interior, and revises the temperature characterisitic of the built-in Hall element of described DC motor.
16. air interchangers according to claim 1, wherein,
Described air interchanger possesses the moisture measurement portion of the ambient humidity, light and temperature measuring air interchanger.
17. air interchangers according to claim 1, wherein,
Possess in described control circuit inside: the storage part of the on/off of storage power and when cutting off the electricity supply to the secondary cell of described control circuit supply electric power,
Described control part monitors the on/off of power supply all the time.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010020070A JP5556200B2 (en) | 2009-02-17 | 2010-02-01 | Ventilation equipment |
| JP2010-020070 | 2010-02-01 | ||
| PCT/JP2010/004931 WO2011092756A1 (en) | 2010-02-01 | 2010-08-05 | Ventilation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102741619A CN102741619A (en) | 2012-10-17 |
| CN102741619B true CN102741619B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080062870.1A Active CN102741619B (en) | 2010-02-01 | 2010-08-05 | Ventilation device |
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| Country | Link |
|---|---|
| CN (1) | CN102741619B (en) |
| WO (1) | WO2011092756A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5533973B2 (en) * | 2012-10-10 | 2014-06-25 | ダイキン工業株式会社 | Humidity control ventilator |
| DE102013204137A1 (en) * | 2013-03-11 | 2014-09-11 | BSH Bosch und Siemens Hausgeräte GmbH | Method for determining an operating state of an extractor hood arrangement |
| EP2799789B1 (en) * | 2013-04-30 | 2017-07-19 | Gidelmar, S.A. | Method and system for automatically adjusting the operation of a fan and a computer program implementing the method |
| CN104344492B (en) * | 2013-07-25 | 2018-03-27 | 广东美的制冷设备有限公司 | Duct type ventilation unit and its air quantity control method |
| JP6305309B2 (en) * | 2014-10-16 | 2018-04-04 | リンナイ株式会社 | Ventilation equipment |
| JP6836197B2 (en) * | 2017-12-08 | 2021-02-24 | 株式会社デンソー | Air conditioner |
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|---|---|---|---|---|
| CN101019302A (en) * | 2004-11-18 | 2007-08-15 | 松下电器产业株式会社 | Brushless DC motor and electric apparatus mounting it |
| JP2008139224A (en) * | 2006-12-05 | 2008-06-19 | Hioki Ee Corp | Measuring apparatus |
| CN101354174A (en) * | 2007-07-27 | 2009-01-28 | 三菱电机株式会社 | Heat exchanging ventilator |
| JP2010022102A (en) * | 2008-07-09 | 2010-01-28 | Panasonic Corp | Brushless dc motor and ventilation blower mounting it |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007032998A (en) * | 2005-07-29 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Air conditioner |
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- 2010-08-05 WO PCT/JP2010/004931 patent/WO2011092756A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101019302A (en) * | 2004-11-18 | 2007-08-15 | 松下电器产业株式会社 | Brushless DC motor and electric apparatus mounting it |
| JP2008139224A (en) * | 2006-12-05 | 2008-06-19 | Hioki Ee Corp | Measuring apparatus |
| CN101354174A (en) * | 2007-07-27 | 2009-01-28 | 三菱电机株式会社 | Heat exchanging ventilator |
| JP2010022102A (en) * | 2008-07-09 | 2010-01-28 | Panasonic Corp | Brushless dc motor and ventilation blower mounting it |
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| Publication number | Publication date |
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| CN102741619A (en) | 2012-10-17 |
| WO2011092756A1 (en) | 2011-08-04 |
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Application publication date: 20121017 Assignee: Guangdong Matsushita Environment System Co., Ltd. Assignor: Matsushita Ecology Co., Ltd. Contract record no.: 2015990000913 Denomination of invention: Ventilation device Granted publication date: 20150325 License type: Common License Record date: 20151105 |
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