WO2011092756A1 - Dispositif de ventilation - Google Patents

Dispositif de ventilation Download PDF

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Publication number
WO2011092756A1
WO2011092756A1 PCT/JP2010/004931 JP2010004931W WO2011092756A1 WO 2011092756 A1 WO2011092756 A1 WO 2011092756A1 JP 2010004931 W JP2010004931 W JP 2010004931W WO 2011092756 A1 WO2011092756 A1 WO 2011092756A1
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WO
WIPO (PCT)
Prior art keywords
current
motor
detection unit
unit
value
Prior art date
Application number
PCT/JP2010/004931
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English (en)
Japanese (ja)
Inventor
列樹 中島
徹 市川
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010020070A external-priority patent/JP5556200B2/ja
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to US13/522,763 priority Critical patent/US8669730B2/en
Priority to CN201080062870.1A priority patent/CN102741619B/zh
Publication of WO2011092756A1 publication Critical patent/WO2011092756A1/fr

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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
    • 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
    • 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

Definitions

  • the present invention relates to a ventilating apparatus that constantly ventilates a room so as to obtain a set air volume regardless of the duct length and the influence of external wind pressure.
  • this type of ventilation device includes a box-shaped ventilation fan main body 103, a motor 101 provided inside the ventilation fan main body 103, and a blade 102 driven by the motor 101.
  • the ventilation fan main body 103 is provided on the ceiling portion 104.
  • this kind of ventilator includes a rotation speed detection unit 105 that detects the rotation speed of the motor 101, and a current detection unit 106 that detects a current flowing through the motor. Such a ventilator controls the motor 101 based on the number of rotations detected by the number-of-rotations detection unit 105 and the current detected by the current detection unit 106.
  • the total ventilation air volume ventilated in a period of a predetermined cycle is determined from the rotation speed detected by the rotation speed detection unit 105 and the current detected by the current detection unit 106.
  • the excess and deficiency of the air volume is determined by comparing the total air volume obtained and the target total ventilation air volume of the predetermined cycle, and the total ventilation air volume of the next cycle period becomes a value obtained by adding the excess and deficiency to the target total ventilation air volume.
  • To control the ventilation air volume of the next cycle period is performed every cycle.
  • DC motors are often used as drive motors for driving the blades
  • air volumes are often set in multiple stages (for example, rapid, strong, weak).
  • the air volume control is performed with a very wide range of 100 m 3 / h to 400 m 3 / h.
  • the present invention can accurately detect the current flowing to the motor, and thus provides a ventilation device that can keep the air volume constant even if the ventilation device has a very wide range of air volume.
  • the ventilating apparatus of the present invention is a ventilating apparatus that can change the air volume, and includes a DC motor that drives blades and a control circuit that controls the DC motor.
  • the control circuit includes a first current detection unit that detects a current flowing through the DC motor, a rotation speed detection unit that detects the rotation speed of the DC motor, and a rotation speed and a first current detection unit that are detected by the rotation speed detection unit. And a controller configured to control the DC motor based on the current detected by the controller.
  • the first current detection unit includes a plurality of low resistances, detects a motor current using a low resistance divided voltage value, and detects the number of rotations detected by the rotation speed detection unit and the first current detection unit. It is characterized in that the ventilation air volume is obtained from the current and the current.
  • FIG. 1 is an attachment state diagram of a ventilating apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a mounting view showing a state in which the ventilating apparatus according to the first embodiment of the present invention is attached to a ceiling.
  • FIG. 3 is a block diagram showing the configuration of the control circuit of the ventilator according to the first embodiment of the present invention.
  • FIG. 4 is a configuration diagram of a current detection unit of the ventilation device according to the first embodiment of the present invention.
  • FIG. 5 is a static pressure (Pa) -ventilated air volume (Q) characteristic curve diagram of the ventilating apparatus according to the first embodiment of the present invention.
  • FIG. 6 is a flow chart showing the operation of the ventilation system of the first embodiment of the present invention.
  • FIG. 7 is a block diagram of a current detection unit according to a second embodiment of the present invention.
  • FIG. 8 is a flowchart showing the driving operation of the ventilating apparatus according to the second embodiment of the present invention.
  • FIG. 9 is a block diagram showing the configuration of a control circuit according to a third embodiment of the present invention.
  • FIG. 10 is a flowchart showing the driving operation of the ventilating apparatus according to the third embodiment of the present invention.
  • FIG. 11 is an attachment diagram of a ventilator according to a fourth embodiment of the present invention.
  • FIG. 12 is a flowchart showing the driving operation of the ventilation system of the fourth embodiment of the present invention.
  • FIG. 13 is a configuration diagram of a current detection unit of a ventilation system according to a fifth embodiment of the present invention.
  • FIG. 14 is a diagram showing the relationship between the current linear correction value and the current of the ventilator of the fifth embodiment of the present invention.
  • FIG. 15 is a diagram showing a configuration in which a differential is provided for the current threshold value of the ventilator of the fifth embodiment of the present invention.
  • FIG. 16 is a flowchart showing the driving operation of the ventilating apparatus according to the fifth embodiment of the present invention.
  • FIG. 17 is a block diagram showing the configuration of the control circuit of the fifth embodiment of the present invention.
  • Embodiment 1 As an example of the ventilation system of the present invention, a ventilation system provided on a ceiling in a building will be described as an example.
  • the main body 3 of the ventilator is installed, for example, on the ceiling 2 of the room 1.
  • a suction port 3a is provided below the main body 3.
  • An adapter 4 is provided on the side surface of the main body 3, and one end of an exhaust duct 5 is connected to the adapter 4.
  • the other end of the exhaust duct 5 is connected to an exhaust port 6 provided on a wall surface in the room.
  • the suction port 3a is provided with a louver 9 having a vent that covers the suction port 3a.
  • control circuit 10 which drives the DC motor 8 is arrange
  • the switch 11 (an integrated switch) is disposed on the wall of the room and connected to the main body 3 of the ventilator. The switch 11 is used to switch on / off the commercial power supply and to switch the fan notch by the user switching.
  • FIG. 3 is a block diagram showing the configuration of the control circuit 10 of the main body 3 of the ventilator.
  • the rectifier circuit 13 is connected to the commercial power supply 12.
  • the rectifying circuit 13 is connected to a smoothing capacitor 13 a that smoothes the voltage to a DC voltage.
  • a voltage detection unit 14 for detecting a DC voltage and a DC motor 8 are connected in parallel to the smoothing capacitor 13a.
  • the switching power supply circuit 15 (for example, an AC-DC converter) is further connected to the smoothing capacitor 13a.
  • the DC motor 8 incorporates a control circuit that controls the DC motor 8.
  • the control circuit includes a control drive IC 8a for DC motor control and a Hall element 18b which is a position detection sensor for detecting the position of the rotor of the DC motor 8 and a drive circuit 8b for energizing the stator winding of the DC motor 8 A three-phase winding (not shown) which is a daughter winding is provided.
  • the ground of the control drive IC 8a and the ground of the drive circuit 8b are connected in common.
  • the current flowing to the ground (GA) side of the DC motor 8 is the sum of the current flowing to the control drive IC 8a, that is, the DC motor driving current, and the current flowing to the three-phase winding through the driving circuit 8b, that is, the current flowing to the motor itself That is, it is a total current.
  • the switching power supply circuit 15 outputs a voltage (for example, +15 V) of the control drive IC 8 a and a voltage (for example, +5 V) for operating the control unit 16 (for example, a microcomputer).
  • a temperature detection unit 17 that measures the temperature of the switching power supply circuit 15 is provided.
  • the temperature measured by the temperature detection unit 17 is input to the control unit 16.
  • a current detection unit 18 (first current detection unit) that detects the current flowing through the DC motor 8 is provided.
  • the current detection unit 18 detects the current flowing to the ground (GA) of the DC motor 8 and inputs the current to the control unit 16.
  • the control unit 16 outputs a control signal VSP to the DC motor 8 based on the current detected by the current detection unit 18.
  • the DC motor 8 varies the applied voltage in accordance with the voltage value (motor command voltage) of the control signal VSP.
  • the control signal VSP is configured to output a pulse from the control unit 16, smooth the output value with the smoothing capacitor 18 a, and apply the smoothed DC voltage to the DC motor 8.
  • the smoothing capacitor 18 a is connected to the ground (GA) of the DC motor 8.
  • the smoothing capacitor 18 a smoothes the control signal VSP based on the potential of the ground (GA).
  • the drive circuit 8b When the voltage of the control signal VSP is applied to the DC motor 8, the drive circuit 8b is driven by the control drive IC 8a, and a current flows in the three-phase winding. When current flows in the three-phase winding, the rotor of the DC motor 8 rotates. The rotation of the rotor is detected by, for example, the Hall element 18b. Then, the Hall element 18 b outputs an output according to the rotation of the DC motor 8 to the rotation speed detection unit 19. Thus, the rotation speed detection unit 19 can detect the rotation speed of the DC motor 8.
  • control unit 16 determines in advance the relationship between the current and the number of revolutions when the static pressure is varied from P0 to Pmax in the ventilation air volume, and stores it as a data table (not shown).
  • FIG. 4 is a diagram showing the configuration of the current detection unit 18.
  • the current detection unit 18 is configured of a low resistance of 1.5 ⁇ or less.
  • two low resistors 20a are arranged in series in the ground (GA) of the DC motor 8, and one side of the low resistors 20a arranged in series is connected to the ground of the switching power supply circuit 15.
  • a first resistor 20b (low resistor) and a second resistor 20c (low resistor) are provided so as to be connectable in parallel with the low resistor 20a.
  • the first resistor 20b or the second resistor 20c is configured to be connectable to the low resistor 20a by the first switching unit 20d or the second switching unit 20e, respectively.
  • the resistance value of the current detection unit 18 can be switched by switching the first switching unit 20 d and the second switching unit 20 e which are low resistance switching units.
  • the potential of the ground (GA) of the DC motor 8 is amplified by the amplifier 21 (for example, an operational amplifier).
  • the temperature detection unit 17 is configured of, for example, a thermistor.
  • a thermistor is one that changes its resistance when it is given heat.
  • values detected by the temperature detection unit 17, the current detection unit 18, the rotation speed detection unit 19, and the voltage detection unit 14 are input to the control unit 16 (microcomputer).
  • a program capable of performing a series of operations is written in the control unit 16 based on the detection values of the input detection units.
  • the current detection unit 18 detects the current of the DC motor 8
  • the first switching unit 20d and the second switching unit 20e are switched as needed to detect the current.
  • the voltage value of the control signal VSP supplied to the DC motor 8 is connected to the ground (GA) of the DC motor 8 as a reference. Therefore, if the first switching unit 20d and the second switching unit 20e are switched to connect the first resistor 20b, the resistance value of the current detection unit 18 changes from 3 ⁇ to 1 ⁇ . Then, the ground level of the DC motor 8 changes with respect to the ground level of the control unit 16, and the voltage value of the control signal VSP to be actually applied changes. Therefore, a program for correcting the control signal VSP is also written in the control unit 16.
  • FIG. 5 is a static pressure (Pa) -ventilated air volume (m 3 / h) characteristic curve
  • FIG. 6 is a flowchart showing the operation of the ventilator of the present embodiment.
  • the ventilator 3 when the switch 11 is operated by the ventilator user and the weak notch is set as the turning on of the commercial power supply 12 and the fan notch, the ventilator 3 is powered on and controlled. Power is applied to the circuit 10. As shown in FIG. 5, when the weak notch is set, 100 m 3 / h is selected as the air volume.
  • the temperature detected by the temperature detection unit 17 is input to the control unit 16.
  • the control unit 16 is in a standby state for 3 seconds after the application of the power. Thereafter, a control signal VSP (hereinafter referred to as start-up compensation VSP) as a start-up compensation value is applied to the DC motor 8. Since there is a possibility that the DC motor 8 can not start due to a low temperature or the like, it is preferable to select a value that can operate the DC motor 8 even under a low temperature or the like.
  • VSP start-up compensation VSP
  • the standby state refers to a state in which the control unit 16 is left as it is without immediately driving the DC motor 8.
  • the ventilating apparatus of the present embodiment is configured to be able to directly turn on / off the commercial power source 12 by the switch 11. Therefore, when the ventilation system user turns on the ventilation system continuously as entering / turning off / on, the DC motor 8 may rotate with inertia even when the power is turned off. If the power is turned on in that state, a voltage is generated by the rotation of the motor, and a regenerative current may flow to break the element. In order to prevent this, a standby state is provided to wait for the DC motor 8 to stop completely.
  • both the first switching unit 20d and the second switching unit 20e of the current detection unit 18 are open.
  • the control unit 16 keeps the first switching unit 20 d and the second switching unit 20 e as they are, and then the control unit 16.
  • the detection value of the current detection unit 18 input to the control unit 16 is compared with the data table stored in advance in the control unit 16.
  • the control unit 16 raises the DUTY every three seconds.
  • the control unit 16 determines that the ventilation air volume is the prescribed and stops the variation of the DUTY.
  • the duct resistance is increased due to the influence of the external wind or the like, the number of rotations is decreased and the current is increased.
  • the first switching unit 20 d is turned on (ON).
  • the first resistor 20b is connected in parallel with the low resistor 20a. That is, the resistance value of the current detection unit 18 is 1 ⁇ . If the value detected by the current detection unit 18 does not reach 3.0 V when the first switching unit 20 d is turned on, the state is maintained as it is. Then, similarly to the above, the detection value of the current detection unit 18 input to the control unit 16 is compared with the data table stored in advance in the control unit 16.
  • the DUTY is changed every three seconds. This is repeated, and when there is no rotational speed difference with respect to the prescribed rotational speed, the control unit 16 determines that the prescribed ventilating air flow rate has been obtained and stops the variation of the DUTY.
  • the second switching unit 20 e is further turned on.
  • the second resistor 20c is connected in parallel to the low resistor 20a and the first resistor 20b. That is, the resistance value of the current detection unit 18 is 0.6 ⁇ .
  • the detection value of the current detection unit 18 input to the control unit 16 is compared with the data table stored in advance in the control unit 16.
  • the DUTY is changed every three seconds. This is repeated, and when there is no rotational speed difference with respect to the prescribed rotational speed, the control unit 16 determines that the prescribed ventilating air flow rate has been obtained and stops the variation of the DUTY.
  • Control unit 16 includes an instruction voltage change unit 200 that corrects the voltage value of control signal VSP.
  • the command voltage changing unit 200 controls the control signal according to the switching state.
  • the voltage value of VSP is corrected, and a correction value is given to the DC motor 8.
  • the current flowing through the three-phase winding of the DC motor 8 is calculated by subtracting the current flowing through the control drive IC 8 a from the current detected by the current detection unit 18 of the DC motor 8. As shown in FIG. 4, the current flowing in the control drive IC 8 a is detected by the current detection unit 18 c, and the detected value is input to the control unit 16 via the amplifier 21. Further, since the standby current of the DC motor 8 changes linearly with the ambient temperature, the temperature correction coefficient is calculated from the temperature detected by the temperature detection unit 17 to calculate the temperature correction.
  • the ventilator configured as described above switches the first switching unit 20d and the second switching unit 20e according to the detected value of the current flowing through the DC motor 8. Thereby, the resistance value of the current detection unit 18 is switched, and the current detection is performed by always selecting the optimum resistance with respect to the current flowing through the DC motor. As a result, the current flowing through the DC motor can be detected accurately, so that the ventilation air volume can be kept constant even when the duct resistance changes due to the influence of the external air or the like.
  • the change of the DUTY described in the present embodiment is made to have a period of 3 seconds, the effect is the same even if the period is made shorter or made longer.
  • the switching threshold of the first switching unit 20d and the second switching unit 20e is set to 3.0 V, the effect is the same even when the threshold is changed.
  • the number of the first switching unit 20d, the second switching unit 20e, and the corresponding resistors is two, the effect is the same when adjusting by changing the number of switching units and resistors. .
  • the current detection method of the current detection unit 18 is configured by the low resistance switching method, the effect is the same even when using a method including an amplification factor change unit (not shown) that switches the amplification factor of the amplifier 21 It is.
  • FIG. 7 is a block diagram of a current detection unit according to a second embodiment of the present invention.
  • FIG. 8 is a flowchart showing the driving operation of the ventilating apparatus according to the second embodiment of the present invention.
  • the current detection unit 18 of the present embodiment includes the ground (GA) of the DC motor 8 and the switching power supply circuit 15 instead of the first switching unit 20d or the second switching unit 20e of the first embodiment.
  • a plurality of low resistances are arranged in series between the grounds of to detect the current.
  • a current detection unit 18c (second one) is provided between the power supply line (+15 V) of the switching power supply circuit 15 and the control drive IC 8a. (Current detection unit) of
  • the ventilator 3 is powered on and the control circuit 10 is energized.
  • the weak notch is set, 100 m 3 / h is selected as the air volume.
  • the control unit 16 When the fan notch is set, the control unit 16 provides the start compensation VSP three seconds after the application of the power to operate the DC motor 8.
  • the current detection unit 18c that detects the current flowing to the control drive IC 8a detects the current.
  • the detection value detected by the current detection unit 18 c is input to the control unit 16.
  • the control unit 16 detects a plurality of detection values detected by the current detection unit 18 that detects the current of the DC motor 8 (for example, in the case where three low resistances are connected in series as shown in FIG.
  • the optimum detection value is selected from the current detection value, the second current detection value, and the third current detection value.
  • the current flowing through the three-phase winding is calculated from the difference between the selected detection value and the detection value of the current detection unit 18c.
  • the rotation speed of the rotor of the DC motor 8 is calculated by comparing the value input to the control unit 16 with the table data set in advance in the control unit 16.
  • the comparison method and the subsequent control are the same as in the first embodiment.
  • the criteria for selecting an optimal detection value from a plurality of current detection values are, for example, as follows. For example, when the control unit 16 is applied with a power supply of +5 V and the control unit 16 has a resolution of 10 bits, it has the highest resolution among the plurality of detection values detected by the current detection unit 18 Choose a value.
  • the total low resistance is 4.5 ⁇ , and the voltage generated in each low resistance with respect to the ground of the switching power supply circuit 15 is 0.225 V, 0.15 V, It becomes 0.075V.
  • the values input to the control unit 16 are 2.25 V, 1.5 V, and 0.75 V, respectively.
  • 2.25 V is selected as the detection value of the current detection unit 18 because 2.25 V can be the highest with respect to 5 V at full scale.
  • the values inputted to the control unit 16 are 3.5 V, 3.0 V, and 1. in the same manner. It becomes 5V.
  • 3.5 V which can be as high as 5 V originally from the resolving power, is selected as the detection value.
  • the amplifier may exceed the allowable range of the input value due to the characteristics of the amplifier, so that the correct value may not be output from the amplifier. Therefore, in this case, 3.0 V, which has the next highest resolving power, is selected as the detection value of the current detection unit 18.
  • the ventilation device configured as described above can accurately detect the current flowing through the three-phase winding of the DC motor 8, so that the ventilation air volume can be constant even when the duct resistance changes due to the influence of the external air or the like. You can keep
  • the current detection unit 18 detects a plurality of current values without switching the switching device or the like, it is possible to eliminate the ground change that occurs at the time of switching and to eliminate noise and the like caused by the ground change.
  • the current flowing through the winding is determined by subtracting the current (drive current) detected by the current detection unit 18 c from the current flowing through the DC motor 8 detected by the current detection unit 18. .
  • a temperature detection unit is provided in the vicinity of the DC motor 8 to detect the temperature of the DC motor 8, calculate the drive current of the DC motor 8 from the detected value, and subtract it from the detection value of the current detection unit 18 It is also possible to detect the current flowing in the Further, even if the winding current is directly detected by a current sensor or the like, the effect is equivalent.
  • the current detection is performed with high accuracy to keep the ventilation air volume constant.
  • the control circuit 10 stores a storage unit 22 (not shown) for storing ON / OFF of the power source, a humidity detection unit 23 for detecting humidity, and a secondary
  • the battery 24 and the diode 201 are further provided.
  • the cathode side of the diode 201 is connected to the power supply (+5 V side) of the control circuit 10
  • the anode side of the diode 201 is connected to the positive side of the secondary battery 24 (for example, button cell) Be done.
  • the negative side of the secondary battery 24 is connected to the ground.
  • a control circuit 10 is provided with a zero cross circuit (not shown).
  • the zero crossing circuit is a circuit that detects the passage of the zero point of the AC voltage.
  • the switch 11 when the switch 11 is operated by the ventilator user and the weak notch is set as the turning on of the commercial power and the fan notch, the power of the main body 3 of the ventilator is turned on and the power is applied to the control unit 16 .
  • the zero cross is input to the control unit 16, and the control unit 16 recognizes that the power is input.
  • the humidity detection unit 23 starts the detection of the humidity, and is input to the control unit 16.
  • control is started with reference to table data (not shown) set in advance.
  • the value when the DC motor 8 is stabilized is stored.
  • the DC motor 8 In order to control the start compensation VSP to be applied to the DC motor 8 three seconds after the application of the power, the DC motor 8 is in a standby state for three seconds after the application of the power.
  • the current detection unit 18 detects the current in the standby state and stores the current in the storage unit 22. Three seconds after the power is applied, the DC motor 8 starts to rotate, and the current detection unit 18 detects the current including the standby current. Therefore, a difference is subtracted from the standby current stored in the storage unit 22 to calculate the winding current.
  • the control unit 16 starts counting time starting from the time when the DC motor 8 starts to rotate, and then counts the time until the power is set to OFF and the energization to the DC motor 8 is cut off.
  • control unit 16 makes the following determination.
  • the control unit 16 determines that there is no influence of the temperature rise of the DC motor 8 and stands by Keep the same without detecting the current of
  • control unit 16 determines that the temperature rise of DC motor 8 is affected. Then, the standby current is measured again to calculate the winding current of the DC motor 8. At this time, it may be further determined whether or not the shutoff time of the DC motor 8 is less than one minute, and the standby current may be measured again only in the case of less than one minute.
  • the ventilator configured as described above can further detect humidity, and thus can detect the specific gravity of air, so that the influence on humidity can be eliminated.
  • the current flowing through the winding of the DC motor 8 can be accurately detected without providing a thermistor to specially change the change in the standby current due to the temperature rise of the DC motor 8, the duct resistance Even if it changes due to the influence of air, the ventilation air volume can be kept constant.
  • Embodiment 4 The fourth embodiment will be described with reference to FIGS. 11 to 12. The description of the same components as in the first embodiment will be omitted.
  • the ventilation device of the present embodiment further includes an orifice (not shown) so that a differential pressure difference is generated inside the exhaust duct 5.
  • the differential pressure detection unit 25 installed on the side surface of the exhaust duct 5 is installed.
  • the HIGH side pressure inlet (not shown) of the differential pressure detection unit 25 is disposed in front of the orifice of the exhaust duct 5 and the LOW side pressure inlet (not shown) is provided behind the orifice of the exhaust duct 5.
  • the differential pressure detection unit 25 is connected to the control circuit 10 installed in the main body 3 by a signal line (not shown).
  • the configuration of the differential pressure detection unit 25 uses, for example, a differential pressure sensor (50 Pa) to accurately detect a low ventilation air flow.
  • the differential pressure sensor has a symmetrical structure in which the pressure receiving surface is a silicon diaphragm, and when the pressure is received, the diaphragm fluctuates and the electrostatic capacitance changes, so that the change of the electrostatic capacitance is electrically output.
  • the ventilating apparatus is configured to be able to vary the ventilation air volume in multiple stages, particularly for a ventilating apparatus using a DC motor.
  • the ventilation air volume is varied, the current flowing to the DC motor is also varied naturally.
  • the current detected by the current detection unit 18 is amplified and the voltage input to the control unit 16 has a resolution Even if the optimum value of is selected, it is very difficult to control the air volume at 1.35 V because it is only 1.35 V. Therefore, in the present embodiment, the differential pressure detection unit 25 is provided, and the configuration in which the current detection unit 18 detects the current value is used in combination.
  • the control unit 16 detects the value of the differential pressure detection unit 25 for three seconds in the standby state after the power is applied. If the value of the differential pressure detection unit 25 is output even though the DC motor 8 is not rotating, the attachment state of the differential pressure detection unit 25 has an effect, and therefore, the control unit 16 is provided.
  • the output voltage of the differential pressure detection unit 25 is voltage corrected by the differential pressure adjustment unit (not shown) (a zero point adjustment is performed).
  • the silicon diaphragm type differential pressure sensor adds weight to the diaphragm and outputs it as a differential pressure signal, so it is necessary to adjust the output.
  • the DC motor 8 starts to rotate, and the current detection unit 18 detects the current flowing through the DC motor 8, and the current is input to the control unit 16.
  • the value of the differential pressure detection unit 25 is used to start operation of the DC motor 8 with reference to the differential pressure data table set in advance. .
  • the ventilator configured as described above can detect the differential pressure accurately even if the ventilation volume is small, but the differential pressure is detected by the differential pressure detection unit, so that the ventilation volume can be accurately detected.
  • a small ventilation air volume can be detected by the differential pressure detection unit 25, when a large air volume is detected, the differential pressure range may be swung out and undetectable.
  • a large current flows, so the value measured by the current detection unit 18 can be used.
  • the duct resistance changes due to the influence of external wind or the like, or the notch is changed by the ventilator user. , Can keep the ventilation air volume constant.
  • the temperature detection unit 17 for measuring the temperature of the switching power supply circuit 15 is provided in the vicinity of the switching power supply circuit 15.
  • the DC motor 8 is configured to include a temperature detection unit 28 that detects the temperature of the Hall element.
  • the relationship between the input resistance of the Hall element (in the absence of a magnetic field and the resistance between the input terminals when the output terminal is open) and the temperature is that the resistance is quadratically curved as the temperature is higher and the temperature is lower when the temperature is low. It has a characteristic that becomes low (for example, at -40 ° C: 1800 ⁇ , 25 ° C: 240 ⁇ , 50 ° C: 100 ⁇ ).
  • control unit 16 is configured to include a storage unit 29 that stores a value for correcting the variation of the electronic component in a non-volatile storage device or the like.
  • an EEPROM is used as the non-volatile storage device.
  • An EEPROM is a semiconductor memory device in which data can be erased or rewritten by voltage operation.
  • the variation in the electronic components causes a decrease in motor current detection accuracy. Therefore, in order to improve the detection accuracy of the motor current, the microcomputer power supply that affects the detection accuracy of the motor current, and the resistors constituting the current detection unit 18 that detects the current flowing through the DC motor 8 are calibrated.
  • Calibration is performed as follows. First, as shown in FIG. 13, for example, a current of 100 mA is supplied between VM and G, and the first switching unit 20d and the second switching unit 20e are turned off. In this manner, the variation in the resistance value of the low resistor 20a provided as one of the resistors of the current detection unit 18 is calibrated. Next, the first switching unit 20d is turned on, and the resistance value of the first resistor 20b is similarly calibrated. Finally, the second switching unit 20e is also turned on to calibrate the resistance value of the second resistor 20c. The results of the above calibrations are sequentially stored in the storage unit 29. Hereinafter, for example, a method of converting the current value when the low resistance 20a is used will be described. As shown in FIG.
  • the current detection unit 18 switches the first switching unit 20d and the second switching unit 20e to detect the current.
  • the detected value of the current input to the control unit 16 is an AD value (analog digital value read by the microcomputer according to the open / close state of the first switching unit 20d and the second switching unit 20e.
  • the relationship between the converted value) and the current (AD value-current) flowing through the current detection resistor occurs in three steps. Therefore, by switching the low resistance switching unit which is the first switching unit 20d or the second switching unit 20e, the result obtained in each case becomes discontinuous. Therefore, appropriate control can not be performed.
  • the current value calculation unit 202 included in the control unit 16 multiplies the raw data of the AD value by a predetermined magnification. For example, when reading the voltage value of only the low resistor 20a, the AD value is tripled, when reading the voltage value obtained by adding the first resistor 20b, 4 times when reading the voltage value added with the second resistor 20c The current detection value which becomes non-continuous by 12 times is converted to the continuous value. This enables one-to-one correspondence between the current value and the AD value.
  • converted value (raw AD value) ⁇ (magnification factor k / microcomputer AD value resolution (1024)) ⁇ (theoretical value (calculation result) / resistance adjustment AD value).
  • the current threshold is provided with a differential.
  • control unit 16 outputs the control signal VSP to the DC motor 8 based on the current value detected by the current detection unit 18 while confirming the response of the rotational speed from the DC motor 8.
  • the DC motor 8 varies the applied voltage in accordance with the value of the control signal VSP. However, when the control signal VSP is output but there is no reply of the rotational speed, it is determined that the DC motor 8 has some abnormality and all switching units are stopped.
  • the temperature detected by the temperature detection unit 28 that detects the temperature of the Hall element is input to the control unit 16.
  • the current flowing through the winding of the DC motor 8 is calculated by subtracting the current flowing through the Hall element from the current detected by the current detection unit 18 of the DC motor 8.
  • the current flowing through the Hall element is converted from the detection value of the temperature detection unit 28. Further, since the current flowing through the winding of the DC motor 8 changes depending on the ambient temperature, the current flowing through the Hall element is determined from the temperature detected by the temperature detection unit 28 and the Hall element temperature correction unit (shown in FIG. Temperature correction is performed.
  • the current value calculation unit 202 sets the values actually stored in the current detection unit 18 to the values stored in the storage unit 29 according to the above-described method. A correction is made from the theoretical value to calculate a converted value.
  • the control unit 16 refers to the rotation speed corresponding to the conversion value from the value detected by the current detection unit 18 from the data table and compares it with the actual rotation speed detected by the rotation speed detection unit 19. As a result of comparison, when it is determined that the rotational speed is high, the control unit 16 raises the DUTY every three seconds. If this operation is repeated and the rotational speed difference disappears, it is determined that the regulated ventilation air flow rate, and the variable of the duty is stopped.
  • the duct resistance is increased due to the influence of the external wind or the like, the number of rotations is decreased and the current is increased.
  • the first switching unit 20 d is turned on.
  • the first resistor 20b is connected in parallel with the low resistor 20a. That is, the resistance value of the current detection unit 18 is 1 ⁇ . If the conversion value does not reach 3.0 V when the first switching unit 20 d is turned on, the state as it is is maintained. Then, similarly to the above, the detection value of the current detection unit 18 input to the control unit 16 is compared with the data table stored in advance in the control unit 16.
  • the DUTY is changed every three seconds. This is repeated, and when there is no rotational speed difference with respect to the prescribed rotational speed, the control unit 16 determines that the prescribed ventilating air flow rate has been obtained and stops the variation of the DUTY.
  • the second switching unit 20 e is further turned on. Then, similarly to the above, the conversion value from the detection value of the current detection unit 18 input to the control unit 16 is compared with the data table stored in advance in the control unit 16.
  • the DUTY is changed every three seconds. This is repeated, and when there is no rotational speed difference with respect to the prescribed rotational speed, the control unit 16 determines that the prescribed ventilating air flow rate has been obtained and stops the variation of the DUTY.
  • the ventilation air volume is adjusted by raising and lowering the DUTY every 3 seconds.
  • the second switching unit 20e when the second switching unit 20e is in the ON state, the influence of the external air or the like is eliminated and the static pressure is lowered, the duct resistance is eliminated, and the current flowing to the DC motor 8 is reduced. Therefore, when the conversion value from the value detected by the current detection unit 18 due to the current reduction is 2.7 V, that is, the second switching unit 20 e is turned off with a differential current threshold of 0.3 V with respect to 3.0 V. Do. In addition, even if the second switching unit 20e is turned off, if the detection value is still 3.0 V or more, the first switching unit 20d is turned off.
  • Control unit 16 includes an instruction voltage change unit that corrects the voltage value of control signal VSP.
  • the command voltage changing unit controls the control signal VSP according to the switching state. And corrects the voltage value of V.sub.0 and supplies the correction value to the DC motor 8.
  • the ventilator configured as described above switches the resistance value using the first switching unit 20d and the second switching unit 20e while detecting the current flowing through the DC motor 8, and always selects the optimum resistance value for the current. To perform current detection while securing the required resolution. Therefore, since the current can be detected accurately, the ventilation air volume can be kept constant even when the duct resistance changes due to the influence of the external wind or the like.
  • the ventilating device attached to a building according to the present invention is widely useful in products that can obtain an air volume within a predetermined time regardless of duct resistance and external wind pressure.

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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

La présente invention concerne un dispositif de ventilation dont le volume d'air peut être modifié, et qui est pourvu d'un moteur à CC destiné à entraîner des pales, et d'un circuit de commande destiné à commander le moteur à CC. Le circuit de commande est pourvu d'une première unité de détection de courant destinée à détecter le courant appliqué sur le moteur à CC, d'une unité de détection de vitesse de rotation destinée à détecter la vitesse de rotation du moteur à CC, et d'une unité de commande destinée à commander le moteur à CC en fonction de la vitesse de rotation détectée par l'unité de détection de vitesse de rotation et du courant détecté par la première unité de détection de courant. L'unité de détection de courant est pourvue de plusieurs résistances faibles, utilise les quantités de tension partielle des résistances faibles pour détecter le courant de moteur, et trouve un volume d'air de ventilation à partir de la vitesse de rotation détectée par l'unité de détection de vitesse de rotation et du courant détecté par la première unité de détection de courant.
PCT/JP2010/004931 2009-02-17 2010-08-05 Dispositif de ventilation WO2011092756A1 (fr)

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US13/522,763 US8669730B2 (en) 2009-02-17 2010-08-05 Ventilation device
CN201080062870.1A CN102741619B (zh) 2010-02-01 2010-08-05 换气装置

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JP2010-020070 2010-02-01
JP2010020070A JP5556200B2 (ja) 2009-02-17 2010-02-01 換気装置

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EP2799789A1 (fr) * 2013-04-30 2014-11-05 Gidelmar, S.A. Procédé et système permettant de régler automatiquement le fonctionnement d'un ventilateur et programme informatique mettant en 'uvre ledit procédé
US20150241076A1 (en) * 2012-10-10 2015-08-27 Daikin Industries, Ltd. Humidity control and ventilation device
JP2016080246A (ja) * 2014-10-16 2016-05-16 リンナイ株式会社 換気装置
WO2019111724A1 (fr) * 2017-12-08 2019-06-13 株式会社デンソー Climatiseur

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DE102013204137A1 (de) * 2013-03-11 2014-09-11 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Ermitteln eines Betriebszustands einer Dunstabzugshaubenanordnung
CN104344492B (zh) * 2013-07-25 2018-03-27 广东美的制冷设备有限公司 管道式通风装置及其风量控制方法

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JP3938179B2 (ja) * 2004-11-18 2007-06-27 松下電器産業株式会社 交流電源直結型ブラシレスｄｃモータおよびそれを搭載した電気機器
JP5111002B2 (ja) * 2007-07-27 2012-12-26 三菱電機株式会社 熱交換換気装置

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JP2007032998A (ja) * 2005-07-29 2007-02-08 Matsushita Electric Ind Co Ltd 空気調和機
JP2008139224A (ja) * 2006-12-05 2008-06-19 Hioki Ee Corp 測定装置
JP2010022102A (ja) * 2008-07-09 2010-01-28 Panasonic Corp ブラシレスｄｃモータとそれを搭載した換気送風装置

Cited By (6)

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Publication number Priority date Publication date Assignee Title
US20150241076A1 (en) * 2012-10-10 2015-08-27 Daikin Industries, Ltd. Humidity control and ventilation device
US9903604B2 (en) * 2012-10-10 2018-02-27 Daikin Industries, Ltd. Humidity control and ventilation device
EP2799789A1 (fr) * 2013-04-30 2014-11-05 Gidelmar, S.A. Procédé et système permettant de régler automatiquement le fonctionnement d'un ventilateur et programme informatique mettant en 'uvre ledit procédé
JP2016080246A (ja) * 2014-10-16 2016-05-16 リンナイ株式会社 換気装置
WO2019111724A1 (fr) * 2017-12-08 2019-06-13 株式会社デンソー Climatiseur
JP2019104262A (ja) * 2017-12-08 2019-06-27 株式会社デンソー 空調装置

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