JP4449095B2 - DC brushless motor pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a DC brushless motor pump having an electronic circuit board for controlling the rotation of a DC brushless motor as a drive source.
[0002]
[Prior art]
In recent years, pump whose drive source is a DC brushless motor, the intensity setting of the bubble jet to suit the tastes of bathers in the tub with bubbles apparatus, in order to perform at a rotation speed of change of the DC brushless motor, bubble bath equipment Small More and more are used for the conversion.
[0003]
The DC brushless motor pump requires an electronic circuit for controlling the rotation of the DC brushless motor. When the electronic circuit is connected to a position away from the DC brushless motor using a signal cable or the like, noise is generated. Affects the electronic circuit and causes malfunction, and therefore, it is necessary to provide a substrate constituting the electronic circuit near the pump body.
[0004]
Hereinafter, the configuration of a conventional DC brushless motor pump will be described with reference to FIG.
[0005]
As shown in FIG. 2, this DC brushless motor pump includes a DC brushless motor (not shown), a motor section including a motor frame 1 incorporating the DC brushless motor, and a suction pipe 3 for sucking hot water. And a pump casing 5 comprising a pump casing cover 2 having a discharge pipe 4 for discharging hot water and a pump casing 5 incorporating a magnet impeller (not shown) for sucking and discharging hot water, and The electronic circuit board 7 for controlling the rotation of the DC brushless motor is housed in the case 6, the case 6 and the electronic circuit board 7 are fixed to a part of the outside of the motor frame 1 with the mounting screws 8, and the inside of the case 6 is rubberized Sealing is performed with a lid 10 with a packing 9 interposed therebetween, and the lid 10 is configured to be attached with a mounting screw 11.
[0006]
[Problems to be solved by the invention]
By the way, the DC brushless motor pump is often used in places with high humidity. Therefore, in order to prevent moisture of the electronic circuit board 7 for controlling the rotation of the DC brushless motor, the case 6 containing the electronic circuit board 7 needs a rubber packing 9 and a lid 10 for sealing the inside of the case 6. And
[0007]
For this reason, there are problems such as an increase in the number of parts and the time and effort required for mounting, and it is necessary to reduce the number of parts from the viewpoint of environmental problems. On the other hand, when the rubber packing 9 and the lid 10 are not provided, water accumulates in the case 6, soaks the electronic circuit board 7, destroys the electronic circuit, and malfunctions. Further, during actual operation, when the temperature in the case 6 becomes high due to the heat generated by the electronic circuit board 7 and the temperature of the outside air becomes lower than the temperature in the case 6, condensation occurs in the case 6. Then, there is a problem that water droplets generated by condensation accumulate in the case 6 and submerge the electronic circuit board 7 to destroy and malfunction the electronic circuit.
[0008]
The present invention solves the above-described conventional problems, and prevents water from collecting in a case containing an electronic circuit board that controls the rotation of a DC brushless motor and destroying the electronic circuit and malfunctioning with a relatively simple structure. It is an object of the present invention to provide a DC brushless motor pump capable of reducing the number of parts.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a DC brushless motor pump having a case incorporating an electronic circuit board for controlling the rotation of a DC brushless motor, wherein the electronic circuit board is housed in the case and all the electronic The circuit board is built in the case so that the circuit board is opened downward, and the case in which the electronic circuit board is built is arranged so that the opening of the case faces downward in a pump installed state, and the opening is through and out of the case is configured to have communication with.
[0010]
According to the present invention, a DC brushless motor capable of preventing water from collecting in a case containing an electronic circuit board that controls the rotation of the DC brushless motor, destroying the electronic circuit and causing malfunction, and reducing the number of components. A pump can be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a pump having a motor part comprising a DC brushless motor and a motor frame incorporating the DC brushless motor, a pump casing cover having a suction pipe and a discharge pipe, and an impeller. a DC brushless motor pump constituted by a pump portion made of casing, in so that and all of the electronic circuit board electronic circuit board for controlling the rotation of the DC brushless motor will fit into the case is opened downward built in the casing, the casing in which the electronic circuit board incorporated inside and outside the arranged by case through the Rutotomoni opening to the downward opening of the case in a pump installation state are communicated DC brushless motor pump characterized in that it is an electronic device that controls the rotation of a DC brushless motor The case with a built-in road substrate prevented from becoming water reservoir to destroy electronic circuit malfunction, has the effect of enabling a reduction in the number of components.
[0012]
According to a second aspect of the present invention, in the DC brushless motor pump according to the first aspect, the electronic circuit board is configured to have a moisture-proof structure by performing potting or the like. Has an effect of more reliably preventing the electronic circuit from being broken and malfunctioning.
[0013]
According to a third aspect of the present invention, in the DC brushless motor pump according to the first or second aspect, the case in which the electronic circuit board is built is mounted on the motor frame above the pump portion when the pump is installed. Even if the pump is splashed with water, it prevents the water from being directly applied to the electronic circuit board, and has the effect that the DC brushless motor and the case can be made compact. .
[0014]
The invention according to claim 4 of the present invention, the DC brushless motor pump according to any one of claims 1 to 3, the case which incorporates the electronic circuit board has been formed of aluminum Since the case is made of aluminum, which is a material with good thermal conductivity, the case can be provided with a heat dissipation function, the temperature rise of the electronic circuit board and the DC brushless motor can be effectively suppressed, and heat dissipation can be promoted. Have
[0015]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
(Embodiment 1)
FIG. 1 is a cross-sectional side view of a DC brushless motor pump according to Embodiment 1 of the present invention. In FIG. 1, members corresponding to the members of the DC brushless motor pump described in the prior art are denoted by the same reference numerals as those of the prior art.
[0017]
In FIG. 1, 1 is a motor frame incorporating a DC brushless motor, 2 is a pump casing cover having a suction pipe 3 for sucking hot water and a discharge pipe 4 for discharging hot water, and 5 is for sucking and discharging hot water. These are pump casings with built-in impellers with magnets, which are configured in the same manner as in the prior art.
[0018]
The feature of the first embodiment lies in the arrangement configuration of the case 6 containing the electronic circuit board 7 for controlling the rotation of the DC brushless motor. That is, the case 6 has its opening portion facing downward when the pump is installed. It arrange | positions so that it may become.
[0019]
The case 6 may be installed on the motor frame 1 and fixed to the motor frame 1 with the mounting screws 8. In this case, a more compact configuration is possible.
[0020]
Further, the electronic circuit board 7 that controls the rotation of the DC brushless motor may be configured in a moisture-proof structure by taking a moisture-proof measure such as potting on the surface thereof.
[0021]
In the DC brushless motor pump configured as described above, water does not collect in the case 6 and is discharged out of the case 6. Therefore, the electronic circuit board 7 can be submerged, the circuit can be destroyed, and malfunction can be prevented. In addition, problems such as an increase in the number of parts and labor of mounting can be solved, and the number of parts can be reduced from the viewpoint of environmental problems. Further, during actual operation, when the temperature in the case 6 becomes high due to heat generation of the electronic circuit board 7 and the temperature of the outside air becomes lower than the temperature in the case 6, water droplets are generated in the case 6 due to condensation. However, since the opening of the case 6 faces downward, water does not accumulate in the case 6 and is discharged out of the case 6, so that the electronic circuit board 7 is submerged and the circuit is destroyed, resulting in malfunction. Can be prevented.
[0022]
In addition, since the case 6 is disposed on the motor frame 1 above the pump in a pump installed state, even when water is applied to the pump, the water is prevented from being directly applied to the electronic circuit board 7.
[0023]
In addition, by forming the case 6 with a material with good thermal conductivity (for example, aluminum) and providing a heat dissipation function, it is possible to effectively suppress the temperature rise of the electronic circuit board and the DC brushless motor and promote heat dissipation. It becomes.
[0024]
【The invention's effect】
As is apparent from the above description, the present invention does not collect water in the case containing the electronic circuit board that controls the rotation of the DC brushless motor, but water is discharged outside the case, causing destruction or malfunction of the electronic circuit. In addition, the heat dissipation effect can be improved, and a highly reliable DC brushless motor pump can be provided with a simple configuration and a small number of parts.
[Brief description of the drawings]
FIG. 1 is a sectional side view of a DC brushless motor pump according to a first embodiment of the present invention. FIG. 2 is a sectional side view of a conventional DC brushless motor pump.
DESCRIPTION OF SYMBOLS 1 Motor frame 2 Pump casing cover 3 Suction pipe 4 Discharge pipe 5 Pump casing 6 Case 7 Electronic circuit board 8 Mounting screw

Claims (4)

DC brushless motor comprising a DC brushless motor and a motor section including a motor frame incorporating the DC brushless motor, a pump casing cover including a suction pipe and a discharge pipe, and a pump section including a pump casing including an impeller A pump,
Electronic circuit board for controlling the rotation of the DC brushless motor for all of the electronic circuit board and will fit into the case is built into the case so that the downwardly open,
DC the case in which the electronic circuit board is built, characterized in that the inner and outer disposed to the case through the Rutotomoni opening to the downward opening of the case in a pump installation state are communicated Brushless motor pump.   2. The DC brushless motor pump according to claim 1, wherein the electronic circuit board is configured in a moisture-proof structure by performing potting or the like.   3. The DC brushless motor pump according to claim 1, wherein the case containing the electronic circuit board is disposed on a motor frame at an upper portion of the pump portion in a pump installation state.   4. The DC brushless motor pump according to claim 1, wherein the case containing the electronic circuit board is made of aluminum. 5.

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