WO2017073112A1 - 充電器 - Google Patents
充電器 Download PDFInfo
- Publication number
- WO2017073112A1 WO2017073112A1 PCT/JP2016/069313 JP2016069313W WO2017073112A1 WO 2017073112 A1 WO2017073112 A1 WO 2017073112A1 JP 2016069313 W JP2016069313 W JP 2016069313W WO 2017073112 A1 WO2017073112 A1 WO 2017073112A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vertical wall
- housing
- charger
- exhaust port
- surrounded
- Prior art date
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20172—Fan mounting or fan specifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20181—Filters; Louvers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a charger in which an electric circuit board and a cooling fan are housed in a housing.
- the charger is provided with a cooling fan for cooling the battery being charged.
- the cooling fan is housed in the housing of the charger in a state of being housed in a fan case.
- An air inlet of the fan case communicates with an air inlet on the side of the housing, and an air outlet of the fan case is configured to be connectable to a battery on the upper surface of the housing.
- the fan case is provided with an opening for guiding a part of the air flowing in the fan case into the charger.
- the present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that water entering from the exhaust port or the intake port of the charger housing does not reach the electric circuit board. Is to do so.
- an electric circuit board and a cooling fan are accommodated in the charger in the charger, and outside air is sucked into the housing by driving the cooling fan. And an exhaust port through which the air cooled inside the housing is discharged is formed.
- On the bottom plate portion of the housing a portion where the water dripped from the air intake port or the air intake port is applied is formed.
- a second vertical wall surrounding the portion where water dripped from the exhaust port or the exhaust port is applied in a bowl shape, and the electric circuit board includes the first vertical wall
- the first vertical wall is outside the range surrounding the intake port or a portion where water dropped from the intake port is applied, and the second vertical wall receives water dropped from the exhaust port or the exhaust port. Outside the area surrounding the part It is location.
- the air inlet or the portion where the water dripped from the air inlet is applied is surrounded by the first vertical wall in the shape of a bowl provided on the bottom plate portion of the housing. For this reason, the water that has entered the housing from the air inlet or the water that has dropped from the air inlet is held within the range surrounded by the first vertical wall.
- the exhaust port or a portion to which water dripped from the exhaust port is surrounded is surrounded by a bowl-shaped second vertical wall provided on the bottom plate portion of the housing. For this reason, the water which entered the housing from the exhaust port or the water dropped from the exhaust port is held within the range surrounded by the second vertical wall.
- the electric circuit board is outside the range in which the first vertical wall surrounds the intake port or a portion where water dripped from the intake port is applied, and the second vertical wall is the exhaust port or the exhaust port. It arrange
- the air inlet is formed in the lower part of the housing and is surrounded by the first vertical wall, and the air outlet is also formed in the lower part of the housing and the second vertical wall.
- the intake port and the exhaust port are formed in the lower part of the housing, it is difficult for water to enter the arrangement range of the electric circuit board from the intake port and the exhaust port.
- the periphery of the intake port when the lower end of the intake port is higher than the upper end of the first vertical wall, the periphery of the intake port is surrounded by the third vertical wall, The water that has entered from the air intake port is configured to be dripped through the third vertical wall into the range surrounded by the first vertical wall, and the lower end of the exhaust port is the second vertical wall.
- the periphery of the exhaust port When the position is higher than the upper end of the exhaust port, the periphery of the exhaust port is surrounded by a third vertical wall, and the water that has entered from the exhaust port passes through the third vertical wall and passes through the second vertical wall. It is comprised so that it may be dripped in the range enclosed by a wall. In this way, by providing the third vertical wall, water entering from the intake port or the exhaust port provided in the upper part of the housing is within the range surrounded by the first vertical wall or on the second vertical wall. Efficient guidance can be achieved within the enclosed range.
- the air inlet is formed in the lower part of the housing and surrounded by the first vertical wall
- the air outlet is formed in the upper part of the housing
- a portion that is surrounded by a vertical wall and is covered with water dripped from the exhaust port through the third vertical wall is surrounded by the second vertical wall.
- the air inlet is formed in the upper part of the housing and surrounded by the third vertical wall
- the air outlet is formed in the lower part of the housing.
- a portion that is surrounded by a vertical wall and is covered with water dripped from the air inlet through the third vertical wall is surrounded by the first vertical wall.
- the electric circuit board is provided on the bottom plate portion of the housing along the bottom plate portion, and when the intake port is formed in the lower portion of the housing, the intake circuit is provided.
- the opening is formed at a position lower than the upper end of the first vertical wall, and when the exhaust port is formed at the lower part of the housing, the exhaust port is lower than the upper end of the second vertical wall. It is formed at a low position. For this reason, it is difficult for water that has entered from the intake port or the exhaust port to splash on the electric circuit board.
- the intake port is formed on one end side in a plan view of the housing, and the exhaust port is formed on the other end side in a plan view of the housing. For this reason, the air sucked from the air intake port can flow through almost the entire area of the housing and can be discharged from the air exhaust port.
- the bottom plate of the housing within a range surrounded by the first vertical wall or the second vertical wall configured to receive water dripped from the intake port or the exhaust port.
- a drain hole is formed in the part. For this reason, it enters into the housing through the intake port or exhaust port at the top of the housing, drops, and the water stored in the area surrounded by the first vertical wall or the second vertical wall is efficiently removed by the drain hole. Can be discharged.
- the cooling fan is installed in the vicinity of the first vertical wall or the second vertical wall in a state where the axis of the fan is substantially horizontal.
- the intake side is directed to the intake port in plan view. For this reason, the cooling fan can efficiently suck outside air into the housing from the air inlet.
- the cooling fan can flow air along the electric circuit board in the housing, and can efficiently cool the electric components on the electric circuit board.
- the cooling fan is installed so that the lower end of the cooling fan is at a height position substantially equal to the electric circuit board or a position lower than the electric circuit board. For this reason, the cooling fan can send air to a low position of the housing.
- the third vertical wall surrounding the intake port or the exhaust port is formed on the ceiling of the housing, and outside the range surrounded by the third vertical wall.
- a guide wall surface for guiding an air flow is formed between the range surrounded by the third vertical wall and the ceiling portion of the housing. For this reason, air does not stay in the corners between the outside of the range surrounded by the third vertical wall and the ceiling surface of the housing.
- a third vertical wall surrounding the periphery of the intake or exhaust port is formed in the ceiling portion of the housing, and the third wall protrudes downward from the ceiling portion of the housing.
- the protruding dimension of the third vertical wall is set so that the protruding end of the vertical wall is lower than the lower end position of the intake port or the exhaust port. For this reason, when water enters from the intake port or the exhaust port, the water is blocked by the third vertical wall and hardly reaches the outside of the range surrounded by the third vertical wall.
- movement of a charger It is a schematic longitudinal cross-sectional view showing the inside of the housing of the charger which concerns on the example 1 of a change.
- the charger 10 according to the present embodiment is a charger for charging a battery 50 for an electric tool.
- front and rear, right and left, and up and down shown in the figure correspond to front and rear, right and left of the charger 10 and up and down.
- the charger 10 includes a power supply circuit 12, a microcomputer 14, a cooling fan 18, a voltage detection circuit 15, and the like.
- the power supply circuit 12 converts the AC power of a household AC power source (power input) into DC power, and the charging DC power source (Vp) and the control DC power source (Vcd, Vcc power source). It is an electric circuit for obtaining.
- the DC power supply (Vp) for charging the power supply circuit 12 is a power supply used for charging the battery 50 (see FIG. 1).
- the thermistor 17 (see FIG. 1) for detecting the temperature of the transformer 12t or the diode 12d is attached to the transformer 12t or the diode 12d.
- switching element FET1 and FET2 are provided in the power supply plus line 21p of the DC power supply (Vp) for charging, and the power supply plus line 21p is connected to the plus terminal Ps of the charger 10. Yes. Further, the power source negative line 21n of the charging DC power source (Vp) is connected to the negative terminal Ns of the charger 10 while being connected to the ground terminal E. As shown in FIG. 1, the plus terminal Ps and minus terminal Nb of the battery 50 are connected to the plus terminal Ps and minus terminal Ns of the charger 10 in a state where the battery 50 is connected to the charger 10. The Further, the voltage between the plus terminal Ps and the minus terminal Ns of the charger 10 is configured to be detected by the voltage detection circuit 15.
- the control DC power supply (Vcd power supply) of the power supply circuit 12 is a DC12V power supply used as a power supply for the cooling fan 18 or the like. As shown in FIG. 2, the AC power of the power supply is converted into DC power by the converter 12c. Is obtained.
- the cooling fan 18 is a fan for cooling the power supply circuit 12 when the temperature of the transformer 12t of the power supply circuit 12 or the diode 12d rises above a predetermined value while the battery 50 is being charged. Note that a fan for cooling the battery 50 is not shown.
- the control DC power supply (Vcc power supply) of the power supply circuit 12 is a DC5V power supply used as a power supply for the microcomputer 14 and the like, and is obtained by stepping down the output voltage (12V) of the converter 12c by the regulator 12r.
- the microcomputer 14 is a control unit that performs charging control of the battery 50 based on information from the battery 50 connected to the charger 10, and switches the switching elements FET ⁇ b> 1 and FET ⁇ b> 2 of the power supply circuit 12 (charging DC power supply (Vp)). It is configured to be turned on / off. For this reason, the microcomputer 14 has the battery 50 connected to the charger 10 and, as shown in FIG. 1, via the microcomputer 52 of the battery 50, the digital communication terminal COM, the analog signal terminal TM, and the microcomputer power supply terminal Vcc. Connected.
- the microcomputer 14 is configured to receive a voltage signal from the voltage detection circuit 15. Thereby, the microcomputer 14 can detect the output voltage of the battery 50 in a state where the battery 50 is connected to the charger 10. The microcomputer 14 can detect that the battery 50 is connected to the charger 10 based on the output voltage of the battery 50. Further, the microcomputer 14 is configured to receive a temperature signal of the thermistor 17 and a fan lock signal (failure signal) of the cooling fan 18. Further, the microcomputer 14 is configured to operate the cooling fan 18 based on the temperature signal of the thermistor 17 and the like. Further, the microcomputer 14 is configured to be able to output a signal representing a charging state, a temperature state, a driving state of the cooling fan 18 and the like to the notification unit 16.
- the housing 30 of the charger 10 is composed of an upper housing 31 and a lower housing 32 that are substantially rectangular in plane.
- the upper housing 31 is a lid-like case that covers the electrical components of the charger 10 housed in the lower housing 32 from above.
- a connection portion (not shown) to which the battery 50 is connected is formed on the outer surface of the upper housing 31.
- the connecting portion of the upper housing 31 is provided with a plus terminal Ps, a minus terminal Ns, a digital communication terminal COM, an analog signal terminal TM, and a microcomputer power supply terminal Vcc of the charger 10.
- the upper left portion of the upper housing 31, that is, the left corner portion of the ceiling portion 312 and the outer peripheral vertical wall portion 314 of the upper housing 31, has a housing at a substantially central position in the front-rear direction, as shown in FIGS.
- An exhaust port 31p for discharging the air in 30 is formed.
- a planar U-shaped vertical wall 315 is formed that surrounds the exhaust port 31 p from three directions in the front-rear direction and the right direction.
- the ceiling-side vertical wall 315 is a vertical wall that protrudes downward from the ceiling portion 312 of the upper housing 31. As shown in FIG. 4, the left-side edge of the ceiling-side vertical wall 315 constitutes the outer peripheral vertical wall that constitutes the upper housing 31. It is joined to the inner wall surface of the part 314.
- the exhaust port 31p is surrounded from the periphery by the outer peripheral vertical wall portion 314 and the ceiling-side vertical wall 315, as shown in FIG. For this reason, even when water enters the upper housing 31 from the exhaust port 31p, the water drops along the ceiling-side vertical wall 315 and the like.
- the ceiling-side vertical wall that protrudes downward from the ceiling portion 312 of the upper housing 31 so that the lower end position of the ceiling-side vertical wall 315 is lower than the lower end position of the exhaust port 31p.
- a projecting dimension of 315 is set.
- a guide wall surface 316 having a concave arcuate cross section is provided at the corner position between the ceiling side vertical wall 315 and the ceiling portion 312 outside the range surrounded by the ceiling side vertical wall 315. It is formed along the side vertical wall 315.
- the guide wall surface 316 prevents air flowing in the housing 30 along the ceiling portion 312 in the direction of the exhaust port 31p from staying at the corner position between the ceiling-side vertical wall 315 and the ceiling portion 312.
- the ceiling side vertical wall 315 surrounding the exhaust port 31p may be simply referred to as a third vertical wall.
- the lower housing 32 is an upper open type case in which the electrical components of the charger 10, that is, the electric circuit board 20, the transformer 12t of the power supply circuit 12, the diode 12d, the microcomputer 14, the cooling fan 18, and the like are accommodated.
- the lower housing 32 is coupled to the upper housing 31 by aligning the upper end alignment portion 32 u of the lower housing 32 with the lower end alignment portion 31 d of the upper housing 31 and screwing.
- An air inlet 32e for suctioning in is formed in the lower right part of the lower housing 32, that is, the right corner portion of the bottom plate portion 323 and the outer peripheral vertical wall portion 324 of the lower housing 32, as shown in FIGS.
- An air inlet 32e for suctioning in is formed.
- a planar U-shaped right vertical wall 321 surrounding the intake port 32e in a bowl shape from three directions in the front-rear direction and the left direction is provided inside the lower housing 32.
- the right vertical wall 321 is a vertical wall provided on the bottom plate part 323 of the lower housing 32, and the right edge of the right vertical wall 321 is joined to the inner wall surface of the outer peripheral vertical wall part 324 constituting the lower housing 32.
- the intake port 32e is surrounded by the outer peripheral vertical wall portion 324 and the right vertical wall 321 from the periphery. Note that the upper sides of the outer peripheral vertical wall portion 324 and the right vertical wall 321 are removed to allow the air to pass therethrough.
- the height dimension of the right vertical wall 321 is set so that the upper end position of the right vertical wall 321 is higher than the upper end position of the intake port 32e.
- the right vertical wall 321 may be referred to as a first vertical wall surrounding the intake port from the periphery.
- a left vertical wall 325 is provided at the lower left portion of the lower housing 32.
- the left vertical wall 325 enters from the exhaust port 31p of the upper housing 31 and has a portion (refer to the two-dot chain line at the left end in FIG. 5) where dripped water is applied along the ceiling side vertical wall 315 in the front-rear direction and the right direction. It is formed in a planar U shape surrounding from three sides.
- the left vertical wall 325 is provided on the bottom plate portion 323 of the lower housing 32, and the left end edge of the left vertical wall 325 is joined to the inner wall surface of the outer peripheral vertical wall portion 324 constituting the lower housing 32.
- a drain hole 323 h is formed at the center of the bottom plate portion 323 surrounded by the outer peripheral vertical wall portion 324 and the left vertical wall 325.
- the height dimension of the left vertical wall 325 is set to a value larger than the height dimension of the right vertical wall 321. Further, the height dimension of the left vertical wall 325 is determined by the positional relationship with the lower end of the ceiling side vertical wall 315.
- the height is set so that the water dripping from the ceiling-side vertical wall 315 surely falls within the range surrounded by the left-side vertical wall 325 and does not hinder the wind flow (see the black arrow).
- the lower end of the ceiling-side vertical wall 315 is lower than the upper end of the left-side vertical wall 325. It is preferable to do this. However, if it does in this way, the flow of a wind will worsen and the cooling performance of the charger 10 will fall.
- the upper end of the left vertical wall 325 is made as close as possible to the height of the ceiling vertical wall 315 at a position lower than the lower end of the ceiling vertical wall 315.
- the left vertical wall 325 may be referred to as a second vertical wall surrounding a portion where water dripped from the exhaust port is applied.
- the electric circuit board 20 is accommodated in the lower housing 32 outside the range surrounded by the left vertical wall 325 and outside the range surrounded by the right vertical wall 321.
- the electric circuit board 20 is held in parallel with the bottom plate part 323 of the lower housing 32 by supporting the edge of the electric circuit board 20 from below by a plurality of support legs 25 as shown in FIG. ing.
- the height position of the upper surface of the right vertical wall 321 is set to a position higher than the upper end position of the air inlet 32e.
- the height position of the electric circuit board 20 is set to a position lower than the upper end positions of the left vertical wall 325 and the right vertical wall 321.
- the cooling fan 18 is installed on the electric circuit board 20 with the axis of the fan held substantially horizontally.
- the cooling fan 18 is disposed in the vicinity of the right vertical wall 321 with the intake side 18 e of the cooling fan 18 directed toward the intake port 32 e of the lower housing 32.
- the air blowing side 18w of the cooling fan 18 is directed to electrical components such as the transformer 12t and the diode 12d.
- the processing of the flowchart shown in FIG. 6 is executed based on a program stored in the memory of the microcomputer 14.
- the microcomputer 14 When power is supplied to the charger 10, the microcomputer 14 operates and the program starts.
- the cooling fan 18 is held in a stopped state (step S101).
- the temperature of the electrical component of the charger 10 is compared with the threshold value 1 in step S102.
- the temperature of the electrical component is the temperature of the transformer 12 t or the diode 12 d measured by the thermistor 17.
- the threshold value 1 is set to about 50 ° C., for example.
- the temperature of the electrical component is compared with the threshold value 2 in step S108.
- the threshold value 2 is set at a temperature lower than the threshold value 1, for example, about 40 ° C.
- step S110 it is determined whether or not the battery 50 is connected to the charger 10. Whether or not the battery 50 is connected is determined by whether or not the microcomputer 14 of the charger 10 detects the voltage of the voltage detection circuit 15 or receives data from the microcomputer 52 of the battery 50. If the battery 50 is not connected to the charger 10, the process returns to step S102. When the temperature of the electrical component exceeds the threshold 1 (YES in step S102), power is supplied to the cooling fan 18 and the cooling fan 18 is driven (step S103). Next, in step S104, it is determined whether or not the microcomputer 14 has received a fan lock signal.
- the fan lock signal is a signal transmitted from the cooling fan 18 to the microcomputer 14 when the cooling fan 18 fails.
- the microcomputer 14 receives the fan lock signal (YES in step S104)
- the microcomputer 14 stops the cooling fan 18.
- the microcomputer 14 sets a maximum charging current value (allowable maximum current value) that can be charged even when the cooling fan 18 is stopped. Thereby, even when the battery 50 is charged while the cooling fan 18 is stopped, the temperature of the electrical component does not exceed the allowable value.
- step S104 When the microcomputer 14 does not receive the fan lock signal (NO in step S104), that is, when the cooling fan 18 is normal, the operation of the cooling fan 18 is continued and the restriction on the allowable maximum current value is released. Thereby, the charger 10 can flow a charging current required when the battery 50 is connected.
- the cooling fan 18 operates in this manner, outside air is sucked into the housing 30 from the air inlet 32e of the housing 30 (lower housing 32) of the charger 10 as shown in FIG. Then, electrical components such as the transformer 12t and the diode 12d on the electric circuit board 20 are cooled by the cooling fan 18.
- the air heated by cooling the electrical components flows along the ceiling 312 of the upper housing 31 in the direction of the exhaust port 31p, is guided by the guide wall surface 316, and is guided to the lower side of the ceiling side vertical wall 315. Then, the air passes through the inside of the ceiling side vertical wall 315 and is discharged out of the housing 30 through the exhaust port 31p.
- step S110 in FIG. 6 the connection state of the battery 50 to the charger 10 is determined. And when the battery 50 is not connected to the charger 10 (step S110 NO), the process from step S102 to step S110 is repeatedly performed.
- step S110 YES it is determined whether or not a charge permission signal is input from battery 50 (step S112).
- the processing from step S102 to step S112 is repeatedly executed.
- the cooling fan 18 is driven (step S113). In this case, even if the temperature of the electrical components such as the transformer 12t and the diode 12d is lower than the threshold values 1 and 2, the cooling fan 18 is driven. This is because the temperature of these electrical components necessarily rises when charging is started.
- step S114 it is determined whether or not a fan lock signal has been received.
- the cooling fan 18 is stopped, and after the maximum charging current value (allowable maximum current value) is set (step S115), the battery 50 is charged. Performed (step S116). If the fan lock signal is not received (NO in step S114), the cooling fan 18 is continuously driven, and the battery 50 is charged in a state where the allowable maximum current value is not set (step S116). .
- step S117: YES, step S118: NO the processing from step S114 to step S118 is repeatedly executed.
- step S118 When the charging of the battery 50 is completed (step S118: YES), the charging is stopped and the process returns to step S102 (step S119). Moreover, if the battery 50 is removed from the charger 10 in the middle of charge (step S117 NO), charge will be stopped and a process will be returned to step S102 (step S119).
- the air inlet 32e is surrounded by the right vertical wall 321 (first vertical wall) inside the housing 30. For this reason, the water that has entered the housing 30 from the air inlet 32e is blocked by the right vertical wall 321 and the like.
- the exhaust port 31p is surrounded by a ceiling-side vertical wall 315 (third vertical wall) inside the housing 30. Further, a left vertical wall 325 (second vertical wall) is formed on the bottom plate portion 323 of the housing 30 so as to surround a portion where water dripped from the ceiling side vertical wall 315 is applied.
- the water that has entered the housing 30 from the exhaust port 31p drops down along the ceiling-side vertical wall 315 and the like, and is guided to a range surrounded by the left-side vertical wall 325.
- the electric circuit board 20 is disposed outside the range surrounded by the left vertical wall 325 and outside the range surrounded by the right vertical wall 321 and the like. For this reason, even if water enters the housing 30 from the intake port 32e and the exhaust port 31p, it becomes difficult for the water to reach the electric circuit board 20 and the electric components.
- the air inlet 32e is formed in the lower part of the housing 30 lower than the upper surface of the right vertical wall 321 (first vertical wall), water that has entered the housing 30 from the air inlet 32e enters the electric circuit board 20. It won't hang.
- the exhaust port 31p is formed in the ceiling part 312 of the housing 30, or its vicinity, the air heated by cooling an electrical component can be discharged
- the intake port 32e is formed on the right side of the housing 30 and the exhaust port 31p is formed on the left side of the housing 30, the air sucked from the intake port 32e flows through almost the entire area of the housing 30. The exhaust port 31p can be discharged.
- a drain hole 323h is formed in the bottom plate portion 323 of the housing 30 surrounded by the left vertical wall 325 and the like (second vertical wall). For this reason, it enters the housing 30 from the exhaust port 31p, drops downward along the ceiling-side vertical wall 315 (third vertical wall), etc., and collects the water stored in the range surrounded by the left vertical wall 325 and the like. The water can be efficiently discharged by the drain hole 323h.
- the cooling fan 18 is installed in the vicinity of the right vertical wall 321 and the like with the fan axis substantially horizontal, and the intake side 18e of the cooling fan 18 is directed to the intake port 32e in plan view. . For this reason, the cooling fan 18 can efficiently suck outside air into the housing 30 from the air inlet 32e. In addition, the cooling fan 18 can flow air along the electric circuit board 20 in the housing 30, and can efficiently cool the electric components on the electric circuit board 20.
- a wall surface 316 is formed. For this reason, air does not stay in the corners between the outside of the range surrounded by the ceiling side vertical wall 315 and the like and the ceiling surface of the housing 30.
- the protruding dimension of the ceiling-side vertical wall 315 is set so that the protruding end of the ceiling-side vertical wall 315 protruding downward from the ceiling portion 312 of the housing 30 is lower than the lower end position of the exhaust port 31p. For this reason, even when water enters from the exhaust port 31p, the water is blocked by the ceiling-side vertical wall 315 and does not reach the outside of the range surrounded by the ceiling-side vertical wall 315.
- the left vertical wall 325 (second vertical wall) provided on the left side of the bottom plate portion 323 of the lower housing 32 extends upward to the vicinity of the exhaust port 31p.
- a shelf portion 325 d on which the cooling fan 18 is placed is formed at the upper end position of the left vertical wall 325.
- the periphery of the shelf 325d of the left vertical wall 325 is surrounded by the inclined vertical wall 325s.
- the cooling fan 18 is installed on the shelf 325d of the left vertical wall 325 with the air blowing side 18w facing the exhaust port 31p.
- the ceiling-side vertical wall 315 protruding downward from the ceiling portion 312 of the upper housing 31 supports the upper end side surface of the air blowing side 18w of the cooling fan 18, and has a protruding dimension so as not to hinder the air blowing of the cooling fan 18. Is set.
- the ceiling-side vertical wall 315 protruding downward from the ceiling 312 may be simply referred to as a third vertical wall.
- the charger 10 b according to the modified example 2 has an intake port 32 e for sucking outside air into the housing 30 at the lower left portion of the lower housing 32.
- a left vertical wall 325 is provided that surrounds the air inlet 32e in a bowl shape from the front and rear sides and the right side.
- the left vertical wall 325 may be referred to as a first vertical wall.
- an exhaust port 32p for discharging the air in the housing 30 is formed in the lower right portion of the lower housing 32.
- a right vertical wall 321 is provided on the bottom plate portion 323 of the lower housing 32 so as to surround the exhaust port 32p in a bowl shape from the front and rear sides and the left side. For this reason, the right vertical wall 321 may be referred to as a second vertical wall.
- the electric circuit board 20 is housed in the lower housing 32 outside the range surrounded by the left vertical wall 325 and outside the range surrounded by the right vertical wall 321.
- the cooling fan 18 is installed in the right vertical wall 321, that is, in the vicinity of the exhaust port 32p. And the cooling fan 18 is positioned in the state which orient
- the electric components on the electric circuit board 20 are cooled by the outside air, and the air heated by cooling the electric components is discharged from the housing 30 through the exhaust port 32p.
- the upper housing 31 is not formed with an opening such as an exhaust port, it is difficult for water to enter the housing 30. Further, since the third vertical wall for the water droplet guide is not required, the upper housing 31 can be easily formed. Further, since the lower end of the intake port 32e and the lower end of the exhaust port 32p are formed in the bottom plate portion 323 of the lower housing 32, the lower end of the intake port 32e, the lower end of the exhaust port 32p, and a drain hole can be used. There is no need to form holes separately.
- the charger 10 c according to the modification 3 is formed by forming the air inlet 32 e of the charger 10 b according to the modification 2 in the ceiling portion 312 of the upper housing 31.
- the left vertical wall 325 of the lower housing 32 drops from the intake port 31e. It is configured to receive water. That is, the left vertical wall 325 of the lower housing 32 has a funnel-shaped upper portion, and is configured to surround a portion of the left vertical wall 325 with a vertical wall upper end 325u where water dropped from the intake port is applied. ing.
- a drain hole 323 h is formed in the bottom plate portion 323 of the lower housing 32 within a range surrounded by the left vertical wall 325. For this reason, the water dripped from the air inlet 32e of the upper housing 31 is guided to the range surrounded by the left vertical wall 325 of the lower housing 32 and discharged from the water draining hole 323h.
- the charger 10 d according to the modification 4 is formed by forming the air inlet 32 e of the charger 10 b according to the modification 2 in the ceiling portion 312 of the upper housing 31.
- a ceiling-side vertical wall 315 (third vertical wall) is provided in the ceiling 312 of the charger 10d (upper housing 31) according to the modification 4 so as to surround the air inlet 31e. .
- the water that has entered the housing 30 from the air inlet 31e is dripped along the ceiling-side vertical wall 315 and the like.
- a left vertical wall 325 is provided that surrounds a portion where water dripped from the ceiling side vertical wall 315 of the upper housing 31 is applied. Further, a drain hole 323 h is formed in the bottom plate portion 323 of the lower housing 32 within a range surrounded by the left vertical wall 325. For this reason, the water that has entered through the air inlet 32e of the upper housing 31 and dropped along the ceiling-side vertical wall 315 is guided to a range surrounded by the left-side vertical wall 325 of the lower housing 32, and is discharged from the drain hole 323h. .
- the ceiling-side vertical wall 315 in the upper housing 31 the water that has entered the housing 30 from the intake port 31e can be effectively guided to the range surrounded by the left-side vertical wall 325 of the lower housing 32.
- the example which provides the inlet port 32e and the exhaust port 31p in the longitudinal direction one end side and the other end side of the housing 30 was shown.
- a configuration in which the intake port 32e and the exhaust port 31p are provided above and below the central portion of the housing 30 is also possible.
- the electric circuit board 20 since the electric circuit board 20 cannot be disposed at the center position of the housing 30, the electric circuit board 20 needs to be formed in a frame shape.
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Abstract
Description
以下、図1から図10に基づいて、本発明の実施形態1に係る充電器の説明を行なう。本実施形態に係る充電器10は、電動工具用のバッテリ50を充電するための充電器である。ここで、図中に示す前後左右、及び上下は、充電器10の前後左右、及び上下に対応している。
充電器10は、図1の配線ブロック図に示すように、電源回路12とマイコン14、及び冷却ファン18、電圧検出回路15等を備えている。電源回路12は、図2に示すように、家庭用の交流電源(電源入力)の交流電力を直流電力に変換して、充電用直流電源(Vp)と制御用直流電源(Vcd、Vcc電源)とを得るための電気回路である。電源回路12の充電用直流電源(Vp)は、バッテリ50(図1参照)の充電に使用される電源であり、図2に示すように、電源電圧をトランス12tで所定電圧まで降圧した後、ダイオード12dにより直流に変換している。ここで、トランス12t、あるいはダイオード12dには、トランス12t、あるいはダイオード12dの温度を検出するためのサーミスタ17(図1参照)が取り付けられている。
充電器10のハウジング30は、図3に示すように、平面略角形の上部ハウジング31と下部ハウジング32とから構成されている。上部ハウジング31は、下部ハウジング32に収納された充電器10の電気部品を上方から覆う蓋状のケースである。上部ハウジング31の上面外側には、バッテリ50が連結される連結部(図示省略)が形成されている。そして、上部ハウジング31の連結部には、充電器10のプラスターミナルPs、マイナスターミナルNs、及びディジタル通信端子COM、アナログ信号端子TM、及びマイコン電源端子Vccが設けられている。
下部ハウジング32は、充電器10の電気部品、即ち、電気回路基板20、電源回路12のトランス12t、ダイオード12d、マイコン14、冷却ファン18等が収納される上部開放型のケースである。下部ハウジング32は、図3に示すように、その下部ハウジング32の上端合わせ部32uが上部ハウジング31の下端合わせ部31dに合わせられてネジ止めされることで、上部ハウジング31に連結される。下部ハウジング32の右側下部、即ち、下部ハウジング32の底板部323と外周縦壁部324との右角部には、図3、図5に示すように、前後方向におけるほぼ中央位置に外気をハウジング30内に吸引するための吸気口32eが形成されている。
次に、前記充電器10の動作を、図6のフローチャート等に基づいて説明する。ここで、図6に示すフローチャートの処理は、マイコン14のメモリに格納されているプロクラムに基づいて実行される。充電器10に電源が供給されるとマイコン14が動作してプロクラムがスタートする。初期段階では、冷却ファン18は停止状態に保持される(ステップS101)。次に、ステップS102で充電器10の電気部品の温度が閾値1と比較される。ここで、電気部品の温度は、サーミスタ17によって測定されたトランス12t、あるいはダイオード12dの温度である。また、閾値1は、例えば、約50℃に設定されている。電気部品の温度が閾値1よりも低い場合には(ステップS102 NO)、ステップS108で電気部品の温度が閾値2と比較される。ここで、閾値2は、閾値1よりも低い温度で、例えば、約40℃に設定されている。
本実施形態に係る充電器10によると、吸気口32eは、ハウジング30の内部で周囲を右側縦壁321(第1の縦壁)によって囲まれている。このため、吸気口32eからハウジング30内に入り込んだ水は右側縦壁321等によって遮られる。また、排気口31pは、ハウジング30の内部で周囲を天井側縦壁315(第3の縦壁)によって囲まれている。さらに、ハウジング30の底板部323上には、天井側縦壁315から滴下した水が掛かる部位を囲む左側縦壁325(第2の縦壁)が形成されている。このため、排気口31pからハウジング30内に入り込んだ水は天井側縦壁315等を伝って下方に滴下し、左側縦壁325によって囲まれる範囲に導かれる。電気回路基板20は、左側縦壁325に囲まれる範囲の外側であって、右側縦壁321等に囲まれる範囲の外側に配置されている。このため、吸気口32e、及び排気口31pからハウジング30内に水が入り込んでも、水が電気回路基板20、及び電気部品まで到達し難くなる。
本発明の形態を上記構造を参照して説明したが、本発明の目的を逸脱せずに多くの交代、改良、変更が可能であることは当業者であれば明らかである。したがって本発明の形態は、添付された請求項の精神と目的を逸脱しない全ての交代、改良、変更を含みえる。例えば、本発明の形態は、特別な構造に限定されず下記のように変更が可能である。例えば、本実施形態では、冷却ファン18をハウジング30の吸気口32eの近傍に設置する例を示した。しかし、図7に示すように、排気口31pの近傍に設置することも可能である(変更例1)。
変更例1に係る充電器10aでは、下部ハウジング32の底板部323の左側に設けられた左側縦壁325(第2の縦壁)が排気口31pの近傍まで上方に延ばされており、その左側縦壁325の上端位置に冷却ファン18を載せる棚部325dが形成されている。そして、左側縦壁325の棚部325dの周囲が傾斜縦壁部325sによって囲まれている。冷却ファン18は、送風側18wを排気口31pの方向に向けた状態で左側縦壁325の棚部325d上に設置されている。
変更例2に係る充電器10bは、図8に示すように、下部ハウジング32の左側下部に外気をハウジング30内に吸引するための吸気口32eが形成されている。そして、下部ハウジング32の底板部323上には、吸気口32eを前後、及び右方向の三方から塀状に囲む左側縦壁325が設けられている。このため、左側縦壁325を第1の縦壁と呼ぶことがある。また、下部ハウジング32の右側下部にハウジング30内の空気を排出する排気口32pが形成されている。そして、下部ハウジング32の底板部323上には、排気口32pを前後、及び左方向の三方から塀状に囲む右側縦壁321が設けられている。このため、右側縦壁321を第2の縦壁と呼ぶことがある。
変更例3に係る充電器10cは、図9に示すように、変更例2に係る充電器10bの吸気口32eを上部ハウジング31の天井部312に形成したものである。変更例3に係る充電器10cでは、図9に示すように、吸気口31eが上部ハウジング31の天井部312に形成されるため、下部ハウジング32の左側縦壁325は前記吸気口31eから滴下する水を受けられるように構成されている。即ち、下部ハウジング32の左側縦壁325は、上方が漏斗状に拡開しており、前記吸気口から滴下した水が掛かる部位を前記左側縦壁325の縦壁上端325uで囲むように構成されている。このため、前記吸気口31eの周囲を囲う第3の縦壁を省略できる。また、下部ハウジング32の底板部323には、前記左側縦壁325によって囲まれる範囲内に水抜き穴323hが形成されている。このため、上部ハウジング31の吸気口32eから滴下した水は下部ハウジング32の左側縦壁325によって囲まれる範囲に導かれ、水抜き穴323hから排出される。
変更例4に係る充電器10dは、図10に示すように、変更例2に係る充電器10bの吸気口32eを上部ハウジング31の天井部312に形成したものである。変更例4に係る充電器10d(上部ハウジング31)の天井部312には、図10に示すように、吸気口31eを囲んで天井側縦壁315(第3の縦壁)が設けられている。これにより、吸気口31eからハウジング30内に入り込んだ水は天井側縦壁315等を伝って滴下するようになる。
Claims (12)
- ハウジング内に電気回路基板と冷却ファンとが収納されている充電器であって、
前記ハウジングには、前記冷却ファンが駆動されることで、外気が吸引される吸気口と前記ハウジング内を冷却した空気が排出される排気口とが形成されており、
前記ハウジングの底板部上には、前記吸気口、あるいは前記吸気口から滴下した水が掛かる部位を塀状に囲む第1の縦壁と、前記排気口、あるいは前記排気口から滴下した水が掛かる部位を塀状に囲む第2の縦壁とが設けられており、
前記電気回路基板は、前記第1の縦壁が前記吸気口、あるいは前記吸気口から滴下した水が掛かる部位を囲む範囲の外側であって、前記第2の縦壁が前記排気口、あるいは前記排気口から滴下した水が掛かる部位を囲む範囲の外側に配置されている充電器。 - 請求項1に記載された充電器であって、
前記吸気口は前記ハウジングの下部に形成されて、前記第1の縦壁に囲まれており、
前記排気口は同じく前記ハウジングの下部に形成されて、前記第2の縦壁に囲まれている充電器。 - 請求項1に記載された充電器であって、
前記吸気口の下端が前記第1の縦壁の上端よりも高い位置にある場合には、前記吸気口の周囲が第3の縦壁に囲まれて、前記吸気口から入り込んだ水が前記第3の縦壁を伝って前記第1の縦壁に囲まれる範囲内に滴下させられるように構成されており、
前記排気口の下端が前記第2の縦壁の上端よりも高い位置にある場合には、前記排気口の周囲が第3の縦壁に囲まれて、前記排気口から入り込んだ水が前記第3の縦壁を伝って前記第2の縦壁に囲まれる範囲内に滴下させられるように構成されている充電器。 - 請求項3に記載された充電器であって、
前記吸気口は前記ハウジングの下部に形成されて、前記第1の縦壁に囲まれており、
前記排気口は、前記ハウジングの上部に形成されて、前記第3の縦壁に囲まれており、
前記排気口から前記第3の縦壁を伝って滴下した水が掛かる部位が前記第2の縦壁に囲まれている充電器。 - 請求項3に記載された充電器であって、
前記吸気口は前記ハウジングの上部に形成されて、前記第3の縦壁に囲まれており、
前記排気口は、前記ハウジングの下部に形成されて、前記第2の縦壁に囲まれており、
前記吸気口から前記第3の縦壁を伝って滴下した水が掛かる部位が前記第1の縦壁に囲まれている充電器。 - 請求項1から請求項5のいずれかに記載された充電器であって、
前記電気回路基板は、前記ハウジングの底板部上でその底板部に沿って設けられており、
前記吸気口が前記ハウジングの下部に形成されている場合には、前記吸気口は前記第1の縦壁の上端よりも低い位置に形成されており、
前記排気口が前記ハウジングの下部に形成されている場合には、前記排気口は前記第2の縦壁の上端よりも低い位置に形成されている充電器。 - 請求項1から請求項6のいずれかに記載された充電器であって、
前記吸気口は、前記ハウジングの平面視において一端側に形成されており、前記排気口は、前記ハウジングの平面視において他端側に形成されている充電器。 - 請求項1から請求項7のいずれかに記載された充電器であって、
前記吸気口、あるいは排気口から滴下した水を受けられるように構成された第1の縦壁、あるいは第2の縦壁に囲まれる範囲内の前記ハウジングの底板部には、水抜き穴が形成されている充電器。 - 請求項1から請求項8のいずれかに記載された充電器であって、
前記冷却ファンは、ファンの軸心がほぼ水平な状態で、前記第1の縦壁、あるいは第2の縦壁の近傍に設置されており、
前記冷却ファンの吸気側が平面視において前記吸気口に向けられている充電器。 - 請求項9に記載された充電器であって、
前記冷却ファンは、その冷却ファンの下端が前記電気回路基板とほぼ等しい高さ位置、あるいは前記電気回路基板よりも低い位置になるように設置されている充電器。 - 請求項3から請求項10のいずれかに記載された充電器であって、
前記吸気口、あるいは前記排気口の周囲を囲む第3の縦壁は前記ハウジングの天井部に形成されており、
前記第3の縦壁に囲まれる範囲の外側には、前記第3の縦壁に囲まれる範囲と前記ハウジングの天井部間で空気流をガイドするガイド壁面が形成されている充電器。 - 請求項3から請求項10のいずれかに記載された充電器であって、
前記吸気口、あるいは前記排気口の周囲を囲む第3の縦壁は前記ハウジングの天井部に形成されており、
前記ハウジングの天井部から下方に突出する前記第3の縦壁の突出端が前記吸気口、あるいは前記排気口の下端位置よりも低くなるように、前記第3の縦壁の突出寸法が設定されている充電器。
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JP2017547643A JP6679609B2 (ja) | 2015-10-28 | 2016-06-29 | 充電器 |
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CN108352715A (zh) * | 2015-10-28 | 2018-07-31 | 株式会社牧田 | 充电器 |
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JP7107426B2 (ja) | 2019-02-28 | 2022-07-27 | 工機ホールディングス株式会社 | 充電装置 |
Also Published As
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US10986758B2 (en) | 2021-04-20 |
US11627688B2 (en) | 2023-04-11 |
CN108352715A (zh) | 2018-07-31 |
JP6679609B2 (ja) | 2020-04-15 |
US20210259140A1 (en) | 2021-08-19 |
JPWO2017073112A1 (ja) | 2018-08-23 |
EP3370324A1 (en) | 2018-09-05 |
CN108352715B (zh) | 2021-12-24 |
EP3370324A4 (en) | 2019-06-05 |
US20180317348A1 (en) | 2018-11-01 |
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