JP5766292B2 - Motor, pump equipped with the motor, air conditioner, water heater, and heat source machine - Google Patents

Description

  The present invention relates to a motor with a built-in power conversion circuit configured using a semiconductor, and a pump, an air conditioner, a water heater, and a heat source device including the motor.

  In recent years, in a motor with a built-in drive circuit, a rotor provided with a shaft, a bearing, a yoke, and a magnet, and a motor drive circuit board are housed in a stator mold molded in a case shape with unsaturated polyester resin, and an insulating plate is provided on the top surface A structure with a metal bracket covered with a lid is used. Here, the built-in drive circuit generates a basic clock with a circuit configuration in which an oscillation capacitor or a ceramic oscillator is externally attached to a pre-drive IC (integrated circuit), and uses this to generate a PWM (pulse width modulation) signal. (For example, refer to Patent Document 1).

  By the way, in such a drive circuit, since an advanced control method such as sine wave PWM control is used as the drive method, an MHz band sufficiently larger than the PWM frequency has been used as the basic clock frequency. There is also a configuration using a microcomputer instead of the pre-drive IC, and the clock frequency tends to be higher.

  However, since pre-drive ICs and microcomputers require cost and time for chip development, they need to be used by as many users as possible, and in order to provide versatility, the clock frequency can be varied to some extent by the board designer. It is necessary to be able to adjust with external parts (for example, an oscillation capacitor or a ceramic oscillator).

  As described above, the drive circuit with a built-in motor generates a high-frequency clock signal, which also serves as a source of radiation noise. Although the metal bracket serves as a lid for the circuit board and has an effect of shielding radiation noise, there is an electrostatic coupling capacitance Cs between the metal bracket and the ground, and the metal bracket is fitted to the metal bracket. For example, when the electric potential and electric charge of the outer ring of the ball bearing are increased, and a discharge is generated between the inner and outer rings, there is a problem that bearing damage (electrolytic corrosion phenomenon) occurs.

  In order to prevent this, a special structure for electrically connecting the inner and outer rings of the ball bearing to release the charge generated in the outer ring is used (for example, refer to Patent Document 2), or inside the ball bearing. It has been proposed to use ceramic balls for the rolling elements so as not to cause discharge, but in any case, a special discharge structure is required separately, and the cost is increased.

Japanese Patent Laid-Open No. 2002-223581 JP 2009-118628 A

  As described above, in the conventional motors shown in Patent Documents 1 and 2, since the metal bracket has an electrostatic coupling capacity with the ground, the difference in voltage and charge generated between the inner and outer rings of the ball bearings is reduced. Large ball bearings made of metal materials are in a state where the metal is close to point contact, so that the discharge concentrates on the tip of the ball, the energy during the discharge is not dispersed, and the metal damage (electric Eating) occurs. When electric corrosion occurs, there is a problem that a metal surface is present and noise is generated when the rotor rotates. In order to avoid this, there has been a problem that a structure for discharging it at a place other than the bearing is required separately.

  On the other hand, in order to avoid discharge by reducing the difference in voltage and electric charge generated between the inner and outer rings of the ball bearing, there is a method of forming a resin bearing housing integrally with the stator by molding without using a metal plate for the bracket. Conceivable. However, in this case, there is no metal shielding on the anti-stator side of the built-in circuit (the side opposite to the stator side with respect to the built-in circuit), and noise generated from the built-in circuit is directly radiated to the anti-stator side. was there.

  The present invention has been made in view of the above, and it is possible to reduce the noise radiated from the built-in circuit to the outside while taking measures against electrolytic corrosion without using a special discharge structure, and the motor mounted therein An object of the present invention is to provide a pump and equipment.

In order to solve the above-described problems and achieve the object, a motor according to the present invention includes a stator, a rotor that is rotatably arranged inside the stator, and that has a shaft in the center, and a bearing that supports the shaft. An inverter circuit that converts AC power for rotationally driving the rotor from a DC power source, and outputs a control signal for controlling the inverter circuit, and a clock signal used for generating the control signal A control circuit including an oscillation circuit unit to be generated, and a printed circuit board that is disposed perpendicularly to the axial direction of the shaft, and on which the inverter circuit and the control circuit are mounted, and the control circuit is disposed on the stator side And the stator and the printed circuit board are embedded and molded integrally with resin, and the rotor is housed inside Rutotomoni, a mold resin part that holds the bearing, the provided on the printed circuit board is embedded in said mold resin portion, when viewed in plan from a direction perpendicular to the plane of the printed circuit board, at least the oscillator a printed circuit board copper foil is disposed so as to cover the wiring connected to the circuit portion and the oscillator circuit unit, Ru comprising a.

  According to the present invention, there is an effect that noise radiated to the outside from the built-in circuit can be reduced while taking measures against electrolytic corrosion without using a special discharge structure.

FIG. 1 is a side sectional view of a motor 50 according to the first embodiment. FIG. 2 is an internal structure diagram of the pre-drive IC 11 according to the first embodiment. FIG. 3 is a circuit diagram showing electrical wiring of the motor 50 according to the first embodiment. FIG. 4 is a plan view of printed circuit board 1 built in motor 50 according to the first embodiment. FIG. 5 is a side sectional view of the motor 50 according to the second embodiment. FIG. 6 is a side sectional view of the motor 50 according to the third embodiment. FIG. 7 is a side sectional view of the motor 50 according to the fourth embodiment. FIG. 8 is a side sectional view of the motor 50 according to the fifth embodiment. FIG. 9 is a side sectional view of a motor 50 according to the sixth embodiment. FIG. 10 is a diagram illustrating an example of a configuration of a wall-mounted air conditioner according to the seventh embodiment. FIG. 11 is a diagram illustrating an example of a cross-sectional configuration of the air conditioner indoor unit according to Embodiment 7. FIG. 12 is a side sectional view of a motor-integrated pump 51 according to the eighth embodiment. FIG. 13 is a circuit diagram showing electric wiring of the motor of the motor-integrated pump 51 according to the eighth embodiment. FIG. 14 is a plan view of the printed circuit board 1 built in the motor-integrated pump 51 according to the eighth embodiment. FIG. 15 is a configuration diagram of a hot water storage type water heater equipped with a motor-integrated pump according to the ninth embodiment. FIG. 16 is an external view showing the entire heat pump hot water supply outdoor unit.

  DESCRIPTION OF EMBODIMENTS Embodiments of a motor according to the present invention, a pump equipped with the motor, and an apparatus will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a side sectional view of a motor 50 according to the present embodiment. In FIG. 1, a printed circuit board 1 on which a power conversion circuit for driving the motor 50 is mounted is built in the motor 50. The power conversion circuit includes an inverter IC (integrated circuit) 2 (inverter circuit) and a pre-drive IC 11. The inverter IC 2 incorporates a main circuit of a voltage type inverter that applies a voltage to the winding of the stator 3. The inverter IC 2 converts and generates AC power for rotationally driving the rotor 16 from a DC power source and supplies it to the windings of the stator 3. The stator 3 is formed by winding a winding around a stator core and has a substantially annular shape. The stator core has a structure in which, for example, a metal core is punched and laminated. For example, the inverter IC 2 is mounted on the surface of the printed board 1 opposite to the stator 3 side. The stator 3 and the printed circuit board 1 are embedded in a mold resin portion 4 made of a mold resin. That is, the stator 3 and the printed circuit board 1 are mechanically coupled with the mold resin and are integrally formed with the mold resin portion 4. The mold resin portion 4 constitutes an outer shell of the motor 50 and also constitutes a bearing housing 17 described later.

  The motor terminal 5 is a terminal for electrically connecting the printed board 1 and the winding of the stator 3, and is connected to the printed board 1 and the stator 3 by soldering. A voltage is applied to the winding of the stator 3 from the inverter IC 2 mounted on the printed circuit board 1 by the motor terminal 5. The hall element 6 detects the rotational speed or rotational position of the rotor 16 by a change in magnetic flux density generated by the rotor 16. The hall element 6 is mounted on the surface of the printed circuit board 1 on the stator 3 side. The motor external connection lead 7 is for electrically connecting the printed circuit board 1 and a circuit (not shown) outside the motor 50.

  Inside the mold resin portion 4, a rotor penetration hole 8 and a bearing penetration hole 10 communicating with the rotor penetration hole 8 are provided. A rotor 16 is housed and disposed in the rotor penetrating hole 8, and the rotor 16 is disposed inside the stator 3. The rotor 16 has a shaft 18 at the center, and is fixed to the shaft 18 that is a rotating shaft. The rotor 16 is provided with a permanent magnet (not shown) on the outer periphery, and the rotor 16 obtains a rotational force by a rotating magnetic field from the stator 3 and transmits torque to the shaft 18.

  One end of the shaft 18 is supported by a bearing 9-1 (first bearing), and the other end is supported by a bearing 9-2 (second bearing). That is, the shaft 18 is rotatably supported by the bearings 9-1 and 9-2. The bearing 9-1 is disposed on the side opposite to the stator 3 with respect to the printed circuit board 1, and the bearing 9-2 is disposed on the stator 3 side with respect to the printed circuit board 1.

  The bearing 9-1 is fitted into the bearing housing 17. Here, the bearing housing 17 (bearing housing portion) is integrally formed of mold resin as a part of the mold resin portion 4. The bearing 9-1 is fitted into the bearing housing 17 through the bearing penetrating hole 10. The bearing 9-1 is, for example, a ball bearing, and an inner ring 9-1a that rotates integrally with the shaft 18, an outer ring 9-1c that is fitted on the inner peripheral surface of the bearing housing 17, and a plurality of inner rings arranged between the inner and outer rings. Rolling elements 9-1b. One end portion of the shaft 18 on the bearing 9-1 side is pulled out to the outside through the mold resin portion 4 and attached to a load (not shown) (for example, a blower built in an indoor unit of an air conditioner).

  On the other hand, the bearing 9-2 is fitted and held inside the metal bracket 13 fitted in the rotor penetrating hole 8 so as to close the rotor penetrating hole 8. The bearing 9-2 is, for example, a ball bearing, and an inner ring 9-2a that rotates integrally with the shaft 18, an outer ring 9-2c that is fitted on the inner peripheral surface of the metal bracket 13, and a plurality of inner rings arranged between the inner and outer rings. Rolling elements 9-2b.

  The pre-drive IC 11 is a circuit that generates a PWM (Pulse Width Modulation) signal based on the clock signal, the output signal of the Hall element 6 and the like. The capacitor C1 is an external component for determining the clock frequency of the clock signal, and is electrically connected to the predrive IC 11. The pre-drive IC 11, the capacitor C 1, and their wirings constitute a control circuit that generates and outputs a PWM signal that is a control signal for controlling the inverter IC 2, and an oscillation circuit unit that generates a clock signal in this control circuit It is included. The oscillation circuit unit generates a signal having a clock frequency in the MHz band, for example. Both the pre-drive IC 11 and the capacitor C1 are mounted on the surface of the printed circuit board 1 on the stator 3 side.

  The printed circuit board 1 is disposed substantially perpendicular to the axial direction between the stator 3 and the bearing 9-1 in the axial direction of the shaft 18. Also, for example, a copper foil 12 as a metal shielding member is disposed on the surface of the printed circuit board 1 opposite to the stator 3 side (that is, the surface on the bearing 9-1 side). Here, the copper foil 12 is, for example, a printed circuit board copper foil, and is connected to a circuit ground. In the present embodiment, the printed circuit board 1 is a so-called double-sided board in which copper foil is formed on both sides, and the copper foil is processed on the surface on the stator 3 side and used for wiring or the like, and on the bearing 9-1 side. The copper foil 12 processed into a predetermined size and shape is disposed on the surface. The copper foil 12 is connected to the oscillation circuit unit and the oscillation circuit unit which are high-frequency radiation noise sources via the printed circuit board 1 when viewed from a direction perpendicular to the surface of the printed circuit board 1 (periphery) ) The wiring (hereinafter referred to as “oscillation circuit part wiring”) is disposed so as to cover at least.

  FIG. 2 is an internal structural diagram of the pre-drive (waveform generation) IC 11 in the present embodiment. In FIG. 2, an IC chip 20 (semiconductor chip) is composed of a wide gap semiconductor such as silicon, SiC, or GaN, and is formed by a metal electrode (not shown) formed on the IC chip 20 and a metal lead frame 22. A metal electrode 24 disposed on the printed circuit board 1 is electrically connected by a bonding wire 21. The bonding wire 21 is made of a metal wire such as gold or aluminum, and is connected to a metal electrode (not shown) on the IC chip 20 and a metal lead frame 22 by ultrasonic melting. The metal lead frame 22 may be configured to be connected by direct bonding coupling that directly contacts the IC chip 20 to obtain electrical coupling. The IC chip 20, the bonding wire 21, and the metal lead frame 22 are covered with an IC package 23 made of a highly heat conductive resin. In this embodiment, the capacitor C1 for determining the clock frequency is provided outside the pre-drive IC 11, but it can also be mounted in the IC chip 20. In this case, it goes without saying that the lead frame 22 serves as a shielding plate for radiation toward the non-stator side.

  FIG. 3 is a circuit diagram showing electrical wiring of the motor 50 according to the present embodiment. In FIG. 3, a high-voltage DC power supply 38 supplies a DC voltage obtained by rectifying a commercial power supply via a full-wave rectifier circuit (not shown) or a voltage doubler rectifier circuit (not shown) outside the motor 50. Further, the output signal (Hall signal) of the Hall element 6 is converted into a low-pressure pulse signal by a logic circuit inside the pre-drive IC 11, and is output to the outside of the motor 50 as the rotation speed output 31. In the inverter IC 2, the switching pulse widths of six IGBTs (insulated gate bipolar transistors) 34 based on the DC voltage supplied from the high-voltage DC power supply 38 in response to the output voltage command 32 that is a low-voltage analog signal. To change the output voltage of the inverter. At this time, the power supply of the upper arm drive circuit 35 that drives the upper arm among the six IGBTs 34 is generated by the charge pump diode 36 and the external capacitors C1 and C2. Further, a neutral point connection portion 39 is formed at the winding end of the winding of the stator 3 connected to the motor terminal 5 in the motor 50.

  FIG. 4 is a plan view of the printed circuit board 1 built in the motor 50 according to the present embodiment. FIG. 4A shows the arrangement of components on the surface (stator surface) of the printed circuit board 1 on the stator 3 side. (B) shows the arrangement of components on the surface opposite to the stator 3 side (anti-stator surface) when the printed circuit board 1 is seen through from the stator 3 side.

  In FIG. 4, a pre-drive IC 11 and a clock frequency determining capacitor C <b> 1 are surface-mounted on the stator surface of the printed circuit board 1. A copper foil 12 is disposed on the anti-stator surface of the printed circuit board 1. Here, the copper foil 12 is large enough to cover at least the oscillation circuit section and the oscillation circuit section wiring of the control circuit via the printed circuit board 1 when viewed from a direction perpendicular to the surface of the printed circuit board 1. That is, it may be larger than this. The copper foil 12 shields radiation noise that oscillates from the oscillation circuit section and the oscillation circuit section wiring from being radiated to the bearing 9-1 side. In FIG. 4, a part of the oscillation circuit section wiring is indicated by reference numeral 27.

  The printed board 1 is provided with a notch 26 in the vicinity of the arrangement of the capacitor C1. The notch 26 insulates the neutral point connecting part 39 and the printed board 1 shown in FIG. Is for. With such a configuration, the board space in the outer peripheral portion can be effectively used, and the shielding copper foil 12 can be widely arranged up to the edge of the printed board 1.

  As shown in FIG. 4, in this embodiment, the pre-drive IC 11 and the capacitor C1 constituting the control circuit are surface-mounted on the stator surface, and the shielding copper foil 12 is disposed on the anti-stator surface. It is possible to take a structure that does not require a metal bracket for shielding on the stator side (bearing 9-1 side). That is, conventionally, a metal bracket is provided in place of the bearing housing 17 formed of resin. However, in the present embodiment, the arrangement of the shielding copper foil 12 makes the metal bracket unnecessary. can do.

  Moreover, in this Embodiment, by providing the copper foil 12 for shielding on the printed circuit board 1, a distance is ensured between the copper foil 12 and the outer ring 9-1c of the bearing 9-1, and insulation can be taken. Therefore, it is possible to reduce the generated voltage and electric charge between the inner and outer rings by electrostatic induction while obtaining the noise shielding effect.

  Further, by arranging the shielding copper foil 12 at a location closer to the pre-drive IC 11 and the capacitor C1 which are noise radiation sources than the location where the conventional metal bracket is arranged, if the area is the same, the shielding with the metal bracket is possible. High effect. Moreover, when the same shielding effect is calculated | required, the area of a metal shielding member may be small. For this reason, the printed circuit board copper foil on the anti-stator side (bearing 9-1 side) other than the pre-drive IC 11 and the capacitor C1, which are noise radiation sources, can be used for other wiring. The cost is also excellent.

  In the above description, the copper foil 12 is grounded. However, the clock signal in the MHz band generates a lot of FM band noise due to its higher order components. In this frequency band, the metal shielding member is particularly grounded. Since the effect is not sufficient, the configuration may be such that the copper foil 12 is not grounded, thereby further reducing the cost.

  In the present embodiment, for example, a pre-drive IC 11 having an oscillation circuit section in the MHz band and a capacitor C1 are surface-mounted on the surface of the printed circuit board 1 on the stator 3 side to be electrically coupled. Oscillation is achieved by surrounding the structure with a stator core and a metal bracket 13, which are punched and laminated, and covering the opposite side of the stator (bearing 9-1) with a metal shielding member such as copper foil 12 without using a metal bracket. It is possible to make it difficult for the magnetic flux generated by the high frequency current in the MHz band flowing through the circuit unit to be output to the outside of the motor 50.

  Further, for example, a laminated steel plate can be used for the back yoke (not shown) of the rotor 16. In this case, even if the metal bracket 13 disposed on the side of the stator 3 with respect to the printed circuit board 1 is made smaller or made of a non-metallic resin, the rotor 16 and the stator 3 can generate an oscillation circuit section that is a noise radiation source and Since the oscillation circuit unit wiring can be covered and shielded from the stator 3 side, radiation noise can be reduced, and the potential and electric charge generated in the outer ring 9-2c of the bearing 9-2 can be reduced. In order to enhance this effect, the rotor 16-stator is reduced by thinning the magnet of the rotor 16 and increasing the size of the metal back yoke of the rotor, or by narrowing the air gap between the rotor 16 and the stator 3. What is necessary is just to make the clearance gap of the metal shielding between 3 small. Thinning of the magnet can be realized by using a high magnetic force magnet such as a rare earth magnet. In the present embodiment, the configuration using a magnet for the rotor 16 has been described. Needless to say, an induction motor using an aluminum bar for the laminated steel plate has the same effect.

  As described above, according to the present embodiment, it is possible to reduce noise radiated from the built-in circuit of the motor 50 to the outside while taking measures against electrolytic corrosion without using a special discharge structure.

  As described with reference to FIG. 2, the main circuit chip (IC chip 20) of the pre-drive IC 11 can be formed of a wide band gap semiconductor having a larger band gap than silicon. Also, the switching elements of the upper and lower arms in FIG. 3 can be made of a wide gap semiconductor. As the wide gap semiconductor, for example, SiC (silicon carbide), GaN (gallium nitride), diamond, or the like can be used. By using wide band gap semiconductors, withstand voltage is high and allowable current density is high, switching elements and diode elements can be miniaturized, and semiconductor modules incorporating these elements can be miniaturized. . In addition, since the wide band gap semiconductor has high heat resistance, the heat sink fins can be downsized. Furthermore, since the wide band gap semiconductor has low power loss, it is possible to increase the efficiency of the switching element and the diode element, and further increase the efficiency of the semiconductor module. In the present embodiment, by using a wide gap semiconductor having a high switch speed, noise becomes higher than when silicon is used, so that the noise shielding effect by the metal shielding member (copper foil 12) is enhanced.

  In the present embodiment, the motor 50 using, for example, a ball bearing has been described, but it goes without saying that the same effect can be obtained even in a motor using a sleeve bearing using surface contact for the bearing. When flowing fluid such as a pump through a bearing, sleeve bearings are often used. However, when metal pieces are mixed in the fluid and discharge is likely to occur between the bearings even in surface contact, or when using metal bearings The effect is high when resin is used for the bearing support material.

Embodiment 2. FIG.
FIG. 5 is a side cross-sectional view of the motor 50 according to the present embodiment. In FIG. 5, the same components as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 5, a child board 40 is mounted on the surface of the printed circuit board 1 opposite to the stator 3 side (that is, the surface on the bearing 9-1 side). For example, a copper foil 41 as a metal shielding member is disposed on the surface opposite to the first side (that is, the surface on the bearing 9-1 side). Here, the copper foil 41 is, for example, a printed circuit board copper foil of the daughter board 40 and is connected to a circuit ground. When the copper foil 41 is viewed in a plan view from a direction perpendicular to the surface of the printed circuit board 1, the oscillation circuit unit and the oscillation circuit unit wiring described in the first embodiment are reduced through the child substrate 40 and the printed circuit board 1. Is also arranged to cover. 5 is the same as that of FIG. 1, and detailed description thereof is omitted.

  This embodiment is suitable when the copper foil cannot be disposed on the surface of the printed circuit board 1 on the bearing 9-1 side due to substrate restrictions. Here, the case where the copper foil cannot be arranged due to the board restriction is, for example, a case where a so-called single-sided board (a board on which only one side is formed with a printed board copper foil) is used as the printed board 1 and the bearing 9-1. For example, there is no printed circuit board copper foil on the side surface. In such a case, as shown in FIG. 5, the child board 40 is mounted on the main printed circuit board 1 and the copper foil 41 on the child board 40 is used to shield noise radiation toward the anti-stator side. Can do. Other configurations, operations, and effects of the present embodiment are as described in the first embodiment.

Embodiment 3 FIG.
FIG. 6 is a side sectional view of the motor 50 according to the present embodiment. In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 6, a component having a sheet metal 42 is mounted on the surface of the printed board 1 opposite to the stator 3 side (that is, the surface on the bearing 9-1 side). Here, the sheet metal 42 covers at least the oscillation circuit unit and the oscillation circuit unit wiring described in the first embodiment via the printed circuit board 1 when viewed in plan from a direction perpendicular to the surface of the printed circuit board 1. Is arranged. The other configuration in FIG. 6 is the same as that in FIG.

  Similar to the second embodiment, the present embodiment is suitable when the copper foil cannot be disposed on the surface of the printed circuit board 1 on the bearing 9-1 side due to substrate restrictions. In such a case, as shown in FIG. 6, a component having a sheet metal 42 can be mounted on the printed circuit board 1 to shield noise emission toward the non-stator side. As such a component having the sheet metal 42, for example, there is an inverter IC having a heat radiating plate. In this case, the inverter IC2 may be mounted on the surface of the printed circuit board 1 so as to face the pre-drive IC 11 and the capacitor C1 through the printed circuit board 1, and the heat dissipation plate in the inverter IC2 may be a sheet metal 42. Other configurations, operations, and effects of the present embodiment are as described in the first embodiment.

Embodiment 4 FIG.
FIG. 7 is a side sectional view of the motor 50 according to the present embodiment. In FIG. 7, the same components as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 7, the printed circuit board 1 of the present embodiment includes a copper foil 43 as an inner layer. Here, the copper foil 43 is arranged so as to cover at least the oscillation circuit unit and the oscillation circuit unit wiring described in the first embodiment when viewed in plan from a direction perpendicular to the surface of the printed circuit board 1. . 7 is the same as that shown in FIG. 1, and detailed description thereof is omitted.

  In the present embodiment, as shown in FIG. 7, for example, by using the printed circuit board 1 in which the copper foil 43 is disposed in three or more inner layers, it is possible to shield the radiation of noise toward the anti-stator side. Other configurations, operations, and effects of the present embodiment are as described in the first embodiment.

Embodiment 5 FIG.
FIG. 8 is a side sectional view of the motor 50 according to the present embodiment. In FIG. 8, the same components as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 8, the inverter IC 2 is mounted on the surface of the printed circuit board 1 on the stator 3 side. Also, for example, a copper foil 12 as a metal shielding member is disposed on the surface of the printed board 1 opposite to the stator 3 side (that is, the surface on the bearing 9-1 side). Here, the copper foil 12 covers the oscillation circuit unit and the oscillation circuit unit wiring described in the first embodiment through the printed circuit board 1 when viewed from a direction perpendicular to the surface of the printed circuit board 1. At the same time, the inverter IC2 and the (peripheral) wiring to which the inverter IC2 is connected are arranged to cover the inverter IC2. The other configuration in FIG. 8 is the same as that in FIG.

  In the first to fourth embodiments, the oscillation circuit unit and the oscillation circuit unit wiring by the pre-drive IC 11 and the capacitor C1 are radiation noise sources, but when the inverter main element is an FM band noise radiation source, the inverter IC 2 And the peripheral wiring is surface-mounted on the stator 3 side, and the copper foil 12 is disposed so as to shield them on the anti-stator side, whereby the noise radiated from the inverter IC 2 and the peripheral wiring can also be shielded. Other configurations, operations, and effects of the present embodiment are as described in the first embodiment.

Embodiment 6 FIG.
FIG. 9 is a side sectional view of the motor 50 according to the present embodiment. In FIG. 9, the same components as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 9, in the present embodiment, no copper foil is disposed on the surface of the printed circuit board 1 opposite to the stator 3 side (that is, the surface on the bearing 9-1 side). Instead, the conductive tape 44 is adhered to the surface of the mold resin portion 4 on the bearing 9-1 side. Here, the conductive tape 44 is disposed so as to cover at least the oscillation circuit unit and the oscillation circuit unit wiring described in the first embodiment when viewed in a plan view from a direction perpendicular to the surface of the printed circuit board 1. Yes. The conductive tape 44 is, for example, an aluminum tape or a copper tape. In the first to fifth embodiments, all of the metal shielding member is disposed in the mold resin portion 4, whereas in the present embodiment, the metal shielding member (conductive tape 44) is formed of the mold resin portion 4. Located on the surface. The other configuration in FIG. 9 is the same as that in FIG.

  This embodiment is suitable when the copper foil cannot be disposed on the surface of the printed circuit board 1 on the bearing 9-1 side due to substrate restrictions. Here, the case where the copper foil cannot be disposed due to board restrictions is, for example, the case where the printed board 1 is a so-called single-sided board. In such a case, as shown in FIG. 9, by adhering a sticky conductive material such as a conductive tape 44 to the outer shell of the motor 50 after molding, the radiation of noise toward the anti-stator side can be shielded. . Since the conductive tape 44 is attached to the outer surface of the mold resin portion 4, the shielding position is farther from the noise radiation source than when the copper foil 12 is disposed on the printed circuit board 1 as shown in FIG. However, there is an advantage that the conductive tape 44 can be easily attached even after the mold resin portion 4 of the motor 50 having the built-in printed circuit board 1 already formed. Other configurations, operations, and effects of the present embodiment are as described in the first embodiment.

Embodiment 7 FIG.
FIG. 10 is a diagram illustrating an example of the configuration of the wall-mounted air conditioner according to the present embodiment. As shown in FIG. 10, the wall-hanging air conditioner according to the present embodiment includes an air conditioner indoor unit 60 hung on an indoor wall, and the air conditioner indoor unit 60 and refrigerant pipe 64. An air conditioner outdoor unit 62 that is connected and installed outdoors to absorb and exhaust heat. Here, the air conditioner indoor unit 60 is mounted with the motor according to any one of Embodiments 1 to 6, and the indoor blower 61 is rotationally driven by this motor. The indoor blower 61 blows warm air or cold air from the air conditioner indoor unit 60 to improve indoor comfort. The air conditioner outdoor unit 62 includes a blower 63.

  FIG. 11 is a diagram illustrating an example of a cross-sectional configuration of the air conditioner indoor unit according to the present embodiment. FIG. 11 shows an indoor blower 71, an indoor heat exchanger 72, an air outlet 73, an air outlet 74, an air inlet 75, and the like provided in the air conditioner indoor unit 60. The indoor blower 71 is, for example, a line flow blower. The indoor blower 71 is connected to the motor according to any one of the first to sixth embodiments, and the indoor blower 71 is driven by the rotation of the motor.

  In this way, by applying the low-cost drive circuit built-in motor that achieves both the electric corrosion reliability and the low noise described in any of Embodiments 1 to 6 to the indoor blower 71 of the air conditioner indoor unit 60. Compared with the case where a conventional motor is mounted, a low-noise air conditioner can be obtained.

  Further, in the case of a motor with a built-in drive circuit having a high noise level, conventionally, in an air conditioner, it has been necessary to arrange a shielding plate around the motor. In such a case, when the drive circuit built-in motor described in any one of the first to sixth embodiments is applied, the direct material cost of the shield of the device and the processing cost for mounting are unnecessary, and the device is low in cost. Is obtained.

  In the present embodiment, for example, an air conditioner has been described, but it goes without saying that the same effect can be obtained even if it is used for a ventilation fan, a hot water supply heat source pump, or the like.

Embodiment 8 FIG.
FIG. 12 is a side sectional view of the motor-integrated pump 51 according to the present embodiment. In FIG. 12, a printed circuit board 1 on which a power conversion circuit for driving a motor is mounted is built in a pump 51. The power conversion circuit includes an inverter main element 2a (inverter circuit) and a pre-drive IC 11. The inverter main element 2a is a main element that constitutes a main circuit of a voltage type inverter that applies a voltage to the stator winding of the motor, and is, for example, a surface mount type having a metal heat spreader (not shown). The inverter main element 2a is mounted, for example, on the side opposite to the stator (the side opposite to the stator 3 side of the printed circuit board 1). The inverter main element 2 a converts and generates AC power for rotationally driving the rotor 16 from a DC power source and supplies it to the winding of the stator 3. Note that the internal structure of the predrive (waveform generation) IC 11 is as described with reference to FIG. 2 in the first embodiment, and the description thereof is omitted here. The stator 3 is formed by winding a winding around a stator core and has a substantially annular shape. The stator core has a structure in which, for example, a metal core is punched and laminated. The stator 3 and the printed circuit board 1 are embedded in a mold resin portion 4 made of a mold resin. That is, the stator 3 and the printed circuit board 1 are mechanically coupled with the mold resin and are integrally formed with the mold resin portion 4. The mold resin portion 4 constitutes a bearing support structure.

  The motor terminal 5 is a terminal for electrically connecting the printed board 1 and the winding of the stator 3, and is connected to the printed board 1 and the stator 3 by soldering. The motor terminal 5 applies a voltage from the inverter main element 2 a mounted on the printed circuit board 1 to the winding of the stator 3. The hall element 6 detects the rotational speed or rotational position of the rotor 16 by a change in magnetic flux density generated by the rotor 16. The hall element 6 is mounted on the surface of the printed circuit board 1 on the stator 3 side. The motor external connection lead 7 is for electrically connecting the printed circuit board 1 and a circuit (not shown) outside the pump 51.

  A saddle-shaped partition wall 68 is fitted inside the mold resin part 4. The bowl-shaped partition wall 68 has a bottomed cylindrical shape, and a shaft support portion 69a into which one end of a metal shaft 65 is inserted is erected on the bottom. One end of the shaft 65 is inserted and fixed in the shaft support portion 69 a, and the other end is rotatably inserted in the shaft support portion 69 b provided in the pump housing 67. That is, the shaft 65 is held by the mold resin portion 4 through the shaft support portion 69a. The rotor 16 is disposed in the bowl-shaped partition wall portion 68. A sleeve bearing 110 is integrally provided inside the rotor 16, and a shaft 65 is disposed in the cylindrical sleeve bearing 110. The rotor 16 is slidably supported by the shaft 65 via the sleeve bearing 110 and is rotatable inside the stator 3. An impeller 66 is joined to the rotor 16. The bowl-shaped partition wall 68 constitutes a rotor penetration hole 8 for housing the rotor 16, and the motor is constituted by inserting the rotor 16 and the like into the mold resin part 4 through the rotor penetration hole 8. Is done. Further, the pump 51 is configured by fixing the pump housing 67 to the mold resin portion 4 from the impeller 66 side. The pump 51 is provided with a suction port 111 and a discharge port 112. When the rotor 16 rotates, fluid flows from the suction port 111 and fluid is discharged from the discharge port 111 through the impeller 66.

  The pre-drive IC 11 is a circuit that generates a PWM (Pulse Width Modulation) signal based on the clock signal, the output signal of the Hall element 6 and the like. The capacitor C1 is an external component for determining the clock frequency of the clock signal, and is electrically connected to the predrive IC 11. The pre-drive IC 11 and the capacitor C1 and their wiring constitute a control circuit that generates and outputs a PWM signal that is a control signal for controlling the inverter main element 2a, and an oscillation that generates a clock signal in the control circuit. A circuit part is included. The oscillation circuit unit generates a signal having a clock frequency in the MHz band, for example. Both the pre-drive IC 11 and the capacitor C1 are mounted on the surface of the printed circuit board 1 on the stator 3 side.

  The printed circuit board 1 is disposed substantially perpendicular to the axial direction of the shaft 65. Also, for example, a copper foil 12 as a metal shielding member is disposed on the surface of the printed board 1 opposite to the stator 3 side. Here, the copper foil 12 is, for example, a printed circuit board copper foil, and is connected to a circuit ground. The printed circuit board 1 is, for example, a so-called double-sided board in which copper foils are formed on both sides thereof. The copper foil is processed on the surface on the stator 3 side and used for wiring or the like, and the surface on the anti-stator side has a predetermined size and Copper foil 12 processed into a shape is arranged. The copper foil 12 is connected to the oscillation circuit unit and the oscillation circuit unit which are high-frequency radiation noise sources via the printed circuit board 1 when viewed from a direction perpendicular to the surface of the printed circuit board 1 (periphery) ) The wiring ("oscillation circuit part wiring") is disposed so as to cover at least.

  In the pump 51, the rotor 16 is slidably supported on the shaft 65 via the cylindrical surface of the sleeve bearing 110, and the sleeve bearing 110 is lubricated by the fluid flowing in the pump 51, so that the rotor 16 is rotated. The friction with the shaft 65 is reduced. By using the sleeve bearing 110 as described above, the volume of the metal component in which the shaft voltage is induced by the electromagnetic field from the printed circuit board 1 is reduced as compared with the conventional metal ball bearing and the long-axis metal bracket. It becomes possible to do. Further, since the contact surface of the sleeve bearing 11 has a surface shape, the electric field due to the axial voltage is less biased and the discharge is less likely to occur. Further, even if the surface of the sleeve bearing 110 is damaged by electric corrosion due to electric discharge, a large proportion of the non-damaged surface can be secured, and further, the amount of noise generated is smaller than that of the ball bearing due to lubrication by the fluid.

  On the other hand, in the present embodiment, since the peripheral structure of the sleeve bearing 110 is configured by the mold resin portion 4, it is possible to deal with the radiation noise in the MHz band generated around the predrive IC 11 and the clock frequency determining capacitor C1 as in the prior art. The shielding effect by the metal bracket cannot be expected. For this reason, in the present embodiment, the predrive IC 11 and the capacitor C1 are arranged on the surface of the printed circuit board 1 on the stator 3 side, and the radiated noise is generated by the stator 3 made of metal just below the predrive IC11 and the capacitor C1. Radiates in the direction of the impeller 66. Further, the copper foil 12 disposed on the surface of the printed circuit board 1 on the side opposite to the stator shields radiation noise from the pre-drive IC 11 and the capacitor C1 toward the side opposite to the stator, and is equivalent to that without using a metal bracket. Noise emission can be suppressed. In the present embodiment, such a configuration and component arrangement can achieve both noise reduction and radiation noise suppression.

  FIG. 13 is a circuit diagram showing electric wiring of the motor of the motor-integrated pump 51 according to the present embodiment. As shown in FIG. 13, this circuit configuration is obtained by replacing the inverter IC2 with the inverter main element 2a in FIG. 4, and is the same as the circuit configuration described in the first embodiment, so that the description thereof is omitted. To do.

  In the present embodiment, for example, a pre-drive IC 11 having an oscillation circuit section in the MHz band and a capacitor C1 are surface-mounted on the surface of the printed circuit board 1 on the stator 3 side to be electrically coupled. It is generated by a high frequency current in the MHz band that flows through the oscillation circuit section by surrounding it with a stator core, which is a punched and laminated structure, and covering it with a metal shielding member such as copper foil 12 instead of using a metal bracket on the side opposite to the stator It is possible to make it difficult for the magnetic flux to be emitted outside the pump 51.

  Further, for example, a laminated steel plate can be used for the back yoke (not shown) of the rotor 16. In this case, even if the impeller 66 and the pump housing 67 are made of non-metallic resin, the rotor 16 and the stator 3 may cover and shield the oscillation circuit unit and the oscillation circuit unit wiring that are noise radiation sources from the stator 3 side. Therefore, radiation noise can be reduced. In order to enhance this effect, the rotor 16 is reduced in thickness by increasing the size of the metal back yoke of the rotor 16 or by reducing the air gap between the rotor 16 and the stator 3. What is necessary is just to make the clearance gap of the metal shielding between the stators 3 small. Thinning of the magnet can be realized by using a high magnetic force magnet such as a rare earth magnet. In the present embodiment, the configuration using a magnet for the rotor 16 has been described. Needless to say, an induction motor using an aluminum bar for the laminated steel plate has the same effect.

  FIG. 14 is a plan view of the printed circuit board 1 built in the motor-integrated pump 51 according to the present embodiment. FIG. 14A is an arrangement of components on the surface (stator surface) of the printed circuit board 1 on the stator 3 side. (B) shows the arrangement of components on the surface opposite to the stator 3 side (anti-stator surface) when the printed circuit board 1 is seen through from the stator 3 side.

  In FIG. 14, a pre-drive IC 11 and a clock frequency determining capacitor C <b> 1 are surface-mounted on the stator surface of the printed circuit board 1. A copper foil 12 is disposed on the anti-stator surface of the printed circuit board 1. Here, the copper foil 12 is large enough to cover at least the oscillation circuit section and the oscillation circuit section wiring of the control circuit via the printed circuit board 1 when viewed from a direction perpendicular to the surface of the printed circuit board 1. That is, it may be larger than this. The copper foil 12 shields radiation noise that oscillates from the oscillation circuit section and the oscillation circuit section wiring so that it is not radiated to the anti-stator side. In FIG. 14, a part of the oscillation circuit section wiring is indicated by reference numeral 27.

  The printed circuit board 1 is provided with a notch 26 in the vicinity of the arrangement of the capacitor C1. This notch 26 is used to insulate the neutral point connection 39 of FIG. Is. With such a configuration, the board space in the outer peripheral portion can be effectively utilized, and the shielding copper foil 12 can be widely arranged up to the edge of the printed board 1.

  As shown in FIG. 14, in the present embodiment, the pre-drive IC 11 and the capacitor C1 constituting the control circuit are surface-mounted on the stator surface, and the shielding copper foil 12 is disposed on the anti-stator surface. A structure that does not require a metal bracket for shielding on the stator side can be adopted.

  By the way, in FIG. 12, the pre-drive IC 11 and the capacitor C1 for generating the drive waveform are mounted on the surface of the printed circuit board 1 on the stator 3 side, and these are arranged immediately above the stator core. On the other hand, since it is necessary to make the Hall element 6 and the rotor 16 close to each other in order to ensure position detection accuracy, the rotor penetrating hole 8 is disposed immediately above the printed circuit board 1, and the portion is like a pre-drive IC11. It is difficult to arrange tall electronic components. Therefore, the arrangement space for the electronic components on the surface of the printed circuit board 1 on the stator 3 side is limited. Furthermore, since the Hall element 6 also needs to be mounted on the stator 3 side, the arrangement space of the electronic components on the surface of the printed circuit board 1 on the stator 3 side is further limited. For this reason, in the present embodiment, the inverter main element 2a is mounted on the anti-stator surface to secure a mounting space on the stator surface of the pre-drive IC 11 and the capacitor C1, and these can be arranged directly above the stator core. By adopting such a component arrangement, it is possible to enhance the noise shielding effect of the stator core, which is a metal component, and its windings.

  If the metal heat spreader of the inverter main element 2a is disposed immediately above the pre-drive IC 11 and the capacitor C1, it is not necessary to separately provide the shielding copper foil 12, and an effective mounting space for the printed circuit board 1 can be secured.

  In the present embodiment, the shielding copper foil 12 is disposed at a location closer to the pre-drive IC 11 and the capacitor C1, which are noise radiation sources, than the location where the conventional metal bracket is disposed. More effective than shielding with metal brackets. Moreover, when the same shielding effect is calculated | required, the area of a metal shielding member may be small. For this reason, the printed circuit board copper foil on the side opposite to the stator other than the pre-drive IC 11 and the capacitor C1, which are noise radiation sources, can be used for other wiring, and the use efficiency of the printed circuit board 1 can be improved. Is also excellent.

  In the above description, the copper foil 12 is grounded. However, the clock signal in the MHz band generates a lot of FM band noise due to its higher order components. In this frequency band, the metal shielding member is particularly grounded. Since the effect is not sufficient, the configuration may be such that the copper foil 12 is not grounded, thereby further reducing the cost.

  As described above, according to the present embodiment, for example, the sleeve bearing 110 is used as a bearing for supporting the shaft 65, and the sleeve bearing 110 is held by the mold resin portion 4. The copper foil 12 is disposed on the anti-stator surface, and when viewed in a plan view from a direction perpendicular to the surface of the printed circuit board 1, the copper foil 12 covers at least the oscillation circuit unit and the wiring connected to the oscillation circuit unit. Therefore, it is possible to reduce noise radiated to the outside from the built-in circuit of the motor in the pump 51 while taking measures against electrolytic corrosion without using a special discharge structure.

  In the present embodiment, since the bearing and the bearing housing are not required, and the metal bracket is not required, the thickness of the drive circuit built-in motor can be reduced, and the entire pump can be reduced in size. Furthermore, since a metal bracket is unnecessary, the weight of the entire pump can be reduced.

  In addition, the present embodiment is highly effective when applied to a device having a large arrangement restriction of the pump 51 or a device having a small installation space. In addition, the light weight feature is particularly effective when applied to a transportation device such as an automobile or a truck in which the overall weight affects fuel consumption.

  If the copper foil 12 cannot be placed on the anti-stator surface of the printed board 1 due to board restrictions, such as when the printed board 1 is a so-called single-sided board, a child board is mounted on the printed board 1 as in the second embodiment. In addition, by using the copper foil on the child substrate, it is possible to shield the radiation of noise toward the anti-stator side, and the same shielding effect as in the present embodiment can be obtained.

  Further, when the copper foil 12 cannot be disposed on the anti-stator surface of the printed board 1 due to board restrictions, as in the third embodiment, a component having a sheet metal on the printed board 1 (for example, an inverter main element 2a having a metal heat spreader) It is also possible to shield the radiation of noise toward the anti-stator side using this sheet metal, and the same shielding effect as in the present embodiment can be obtained.

  Further, when a copper foil is disposed on the inner layer of the printed circuit board 1, similarly to the fourth embodiment, by using the copper foil in the printed circuit board 1, noise radiation to the anti-stator side is shielded. It is also possible to achieve the same shielding effect as the present embodiment.

  In the present embodiment, the predrive IC 11 and the capacitor C1 are radiation noise sources. However, when the inverter main element 2a is an FM band noise radiation source, the inverter main element 2a is the same as in the fifth embodiment. Is mounted on the surface of the stator, and a copper foil may be disposed so as to shield it on the anti-stator side.

  In addition, when the copper foil 12 cannot be disposed on the anti-stator surface of the printed circuit board 1 due to substrate restrictions, an adhesive conductive material such as a conductive tape is pasted on the outer periphery of the pump 51 after molding as in the sixth embodiment. By attaching, it is also possible to shield the radiation of noise toward the anti-stator side, and the same shielding effect as in the present embodiment can be obtained.

  As the main circuit chip (IC chip 20) of the pre-drive IC 11, a chip formed of a wide gap semiconductor having a larger band gap than silicon can be used. Further, the switching elements and the like of the upper and lower arms in FIG. 13 can be formed of a wide gap semiconductor. As the wide gap semiconductor, for example, SiC (silicon carbide), GaN (gallium nitride), diamond, or the like can be used. By using wide band gap semiconductors, withstand voltage is high and allowable current density is high, switching elements and diode elements can be miniaturized, and semiconductor modules incorporating these elements can be miniaturized. . In addition, since the wide band gap semiconductor has high heat resistance, the heat sink fins can be downsized. Furthermore, since the wide band gap semiconductor has low power loss, it is possible to increase the efficiency of the switching element and the diode element, and further increase the efficiency of the semiconductor module. In the present embodiment, by using a wide gap semiconductor having a high switch speed, noise becomes higher than when silicon is used, so that the noise shielding effect by the metal shielding member (copper foil 12) is enhanced.

  In the present embodiment, an example in which the sleeve bearing 110 is applied to the pump 51 has been described. Even when a ball bearing is applied as in the first embodiment, a metal resin is not used and a non-metallic mold resin is used. Needless to say, the structure that holds the ball bearing can reduce the level of the induced shaft voltage and make it difficult to generate electrolytic corrosion.

Embodiment 9 FIG.
FIG. 15 is a configuration diagram of a hot water storage type water heater equipped with a motor-integrated pump according to the present embodiment. In FIG. 15, the water heater has a hot water storage tank 76 for storing hot water therein, and a hot water supply pipe 77 is connected to the upper part of the hot water storage tank 76, and a water supply pipe 78 is connected to the lower part of the hot water storage tank 76. The water supply pipe 78 is connected through a pressure reducing valve 80 for reducing the water pressure from a water supply port 79 to which a water supply is connected.

  In the hot water storage tank 76, hot water is separated into an upper portion and water is separated into a lower portion due to a difference in specific gravity, and a temperature layer is formed vertically. When the hot water in the hot water storage tank 76 is boiled, hot water is stored from the upper part of the hot water storage tank 76 so that the hot water is pushed down to form a layer and stored. A hot water supply terminal such as a shower 84 and a currant 85 is connected to the end of the hot water supply pipe 77, and when hot water is discharged from the hot water supply terminal, a water supply pipe 78 is connected to the lower part of the hot water storage tank 76, so that the constant water supply pressure is maintained. The water is supplied from the water supply pipe 78 into the hot water storage tank 76, and the hot water storage tank 76 is always filled with hot water.

  In addition, a boiling pipe 81 connected from the lower part to the upper part is connected to the hot water storage tank 76, and a boiling pump 82 and a heat source unit 83 are interposed in the boiling pipe 81. Here, the boiling pump 82 is the pump of Embodiment 8, for example. At the time of boiling, the boiling pump 82 is driven to supply hot water in the lower part of the hot water storage tank 76 to the heat source part 83. After the hot water is heated by the heat source part 83, the hot water is returned to the upper part of the hot water storage tank 76. It will be done. The heat source unit 83 is a heat pump heat source having a heat pump cycle mechanism.

  In addition, a hot water supply mixing valve 101 that connects the hot water supply pipe 77 and the water supply branch pipe 100 branched from the water supply pipe 78 to generate hot water at an appropriate temperature is provided. 101 is mixed with hot water having a set temperature and supplied.

  In addition, the water heater includes a hot water hot water mixing valve 87 that connects the hot water supply pipe 77 and the hot water branch pipe 100 to generate hot water of appropriate temperature, and further, a hot water hot water thermistor 88 on the downstream side of the hot water hot water mixing valve 87, The bath pouring valve 89 for starting / stopping hot water filling is provided. When the hot water filling to the bath is started, the bath pouring valve 89 is opened and mixed at an appropriate temperature by the bath hot water mixing valve 87. Hot water is supplied to the bathtub 86. In addition, the control of the bath / hot water mixing valve 87 drives the bath / hot water mixing valve 87 so that the temperature detected by the bath / hot water thermistor 88 becomes the set hot water filling temperature.

  In addition, the water heater includes a reheating heat exchanger 91 for replenishing hot water in the bathtub 86, and the reheating heat exchanger 91 includes hot water in the bathtub 86 and high-temperature water in the hot water storage tank 76. Heat exchange. The water heater includes a circulation pump 90 for supplying hot water in the bathtub 86 to the reheating heat exchanger 91, and the bathtub 86, the circulation pump 90, and the reheating heat exchanger 91 are annularly connected by a hot water supply pipe. It is connected to the. Here, the circulation pump 90 is the pump of Embodiment 8, for example.

  Further, the hot water discharged from the hot water supply pipe 77 flows into the high-temperature water circulation side circuit of the reheating heat exchanger 91, and the hot water after heat exchange in the reheating heat exchanger 91 is returned to the bottom of the hot water storage tank 76. It is comprised so that. A reheating pump 93 is disposed between the bottom of the hot water storage tank 76 and the reheating heat exchanger 91. By driving the reheating pump 93, high-temperature water is supplied to the reheating heat exchanger 91. I am trying to supply. Here, the reheating pump 93 is, for example, the pump of the eighth embodiment.

  A water level sensor 99 that detects the level of hot water in the bathtub 86 and a bath thermistor 94 that detects the temperature of hot water in the bathtub 86 are provided between the circulation pump 90 and the reheating heat exchanger 91. Further, a reheating thermistor 92 is disposed on the downstream side of the reheating heat exchanger 91 on the bathtub water circulation side. When the hot water in the bathtub 86 is replenished, the circulation pump 90 is first driven, the temperature of the bathtub water is detected by the bath thermistor 94, and the circulation pump 90 is driven until the detected temperature of the bathtub water reaches the set temperature. To do. Also, from the viewpoint of safety, in order not to supply hot water to the bathtub 86, the circulating pump 90 is driven so that the temperature detected by the reheating thermistor 92 does not exceed 60 degrees, for example.

  A bathroom remote controller 95 is installed in the bathroom. The bathroom remote controller 95 is provided with an operation unit 96 such as an UP / DOWN switch for changing the hot water supply temperature and a bath automatic operation switch for turning on / off the bath operation automatically. There is also a display unit 97 for displaying the operation status of the water heater such as the hot water supply temperature and the bath automatic operation.

  Next, the hot water filling operation to the bathtub 86 will be described.

  First, the bath pouring valve 89 is opened when the automatic bathing operation switch disposed in the operation unit 96 of the bathroom remote controller 95 is turned on, or when the automatic hot water filling time is set in advance, the reserved time is reached. The hot water mixed by the bath hot water mixing valve 87 is supplied to the bathtub 86.

  When the hot water filling is completed to the set water level set by the bathroom remote controller 95 or another water heater remote controller (not shown) installed in the kitchen, the bath pouring valve 89 is closed, the circulation pump 90 is driven, and the bathtub The hot water in 86 is agitated, and the reheating heat exchanger 91 exchanges heat with the hot water in the hot water storage tank 76 to raise the bath temperature to the set temperature.

  When the heating to the set temperature is completed, a notification sound is emitted from a speaker (not shown) provided in the bathroom remote controller 95, or a display notifying that the bath has boiled is displayed on the display unit 97.

  Next, the heat insulation operation of the hot water in the bathtub 86 will be described.

  Originally, the whole family should bathe at the end of the hot water filling, but due to the difference in family life patterns, there may be a case where bathing takes place at a time later than the time when the hot water filling is completed. In this case, the heat insulation operation is automatically performed in the hot water storage type water heater. This is performed by driving the circulation pump 90 every predetermined time.

  The heat insulation operation refers to an operation in which the temperature of the hot water in the bathtub 86 is maintained at a set temperature. In addition to performing the reheating with the reheating heat exchanger 91, the bath 86 can be used as long as the hot water does not overflow from the bathtub 86. The hot water valve 89 may be opened to supply hot water from the hot water storage tank 76 to raise the temperature in the bathtub 86.

  In the case of such a configuration, three pumps (boiling pump 82, circulation pump 90, and reheating pump 93) are required in the same main body. The main wear component in the hot water storage tank 76 and the surrounding hot water storage unit is the pump, and the wear life of the pump is a very important matter for the unit. Further, since there is a concern about the occurrence of a failure when a poor quality fluid flows inside the pump, the pump is disposed on the outer peripheral portion where replacement work is easy. For this reason, there are restrictions on the location of the pump in the unit. For this reason, if a separate shielding structure for radiation noise is required on the outer periphery of the pump, the design may be difficult, or the direct price or installation price of the shielding parts may be higher than when the pump is shielded alone, resulting in higher costs. There can be. In addition, if a separate shielding structure is provided, it takes time to replace the pump and the maintainability deteriorates.

  In the present embodiment, since the motor-integrated pump having a long bearing acoustic life and small radiation noise is mounted on the water heater, there is a great effect on extending the life of the entire pump unit. In addition, since a separate noise shielding structure is not required, it is possible to obtain a product with good cost and maintainability. Furthermore, since this embodiment requires, for example, three pumps, the effect is very large.

Embodiment 10 FIG.
FIG. 16 is an external view showing the entire heat pump hot water supply outdoor unit, and represents, for example, the heat pump heat source machine (heat source unit 83) of the hot water storage type hot water supply apparatus in the ninth embodiment. FIG. 16 shows the heat pump hot water supply outdoor unit, but the heat pump air conditioning outdoor unit has substantially the same structure and component arrangement. As shown in FIG. 16, the heat pump hot water supply outdoor unit 103 includes a blower 104 and an air refrigerant heat exchanger 105 disposed on the rear side of the blower 104 on the left side when viewed from the front and water disposed below the blower 104. A blower chamber 111c provided with the refrigerant heat exchanger 106 is provided. Further, the heat pump hot water supply outdoor unit 103 includes, on the right side when viewed from the front, a functional component that is connected to the compressor 107, the air refrigerant heat exchanger 105, and the compressor 107 to form a refrigerant circuit, and a water refrigerant heat exchanger 106. A machine room 111b is provided that includes functional parts that are connected to form a hot water supply circuit and an electrical component storage box 108 that is disposed above and stores electrical components. The blower chamber 111c and the machine chamber 111b are separated by a partition plate 111d. In the heat pump hot water supply outdoor unit 103, except for the arrangement part of the air refrigerant heat exchanger 105 in the blower chamber 111c, these are the outdoor unit base 111a, the front surface portion 111e of the housing, the rear surface portion 111f of the housing, and the upper surface of the housing. The outer portion of the heat pump hot water supply outdoor unit 103 is formed by covering the portion 111g, the right side surface portion 111h of the housing, and the left side surface portion 111k of the housing. On the right side of the heat pump hot water supply outdoor unit 103, there is a valve for water piping connected to a hot water storage tank (not shown) and a terminal block for taking out electrical wiring, and a service panel 121 is attached to protect them. The blower 104 sucks air from the air refrigerant heat exchanger 105 side installed on the rear surface of the blower 104, causes the air refrigerant heat exchanger 105 to exchange heat, and discharges air to the opposite side of the air refrigerant heat exchanger 105. Is done.

  In the ninth embodiment, the pump is disposed in the hot water storage unit. However, in this embodiment, the heat pump hot water supply outdoor unit 103, that is, the heat source unit 83 of the ninth embodiment is integrated with, for example, the motor integrated type of the eighth embodiment. A pump is installed.

  In the ninth embodiment, if the additional cooking function is not required, one pump may be used. In that case, if the pump of the wear part is provided not in the hot water storage unit but in the outdoor unit of the heat source unit 83, the hot water storage unit has the wear part. This eliminates the need for a pump maintenance structure, extends the service life of the pump, eliminates the need for a pump maintenance structure, reduces costs, and eases the restrictions on the unit installation location.

  However, although the heat source unit 83 is generally designed to reduce the cost by sharing parts as much as possible with the outdoor unit of the heat pump air conditioner, an extra water-refrigerant heat exchanger 106 that is not included in the heat pump air conditioner is necessary, and space constraints Is severe. Moreover, since the outdoor unit is often replaced with a place where the gas-type instantaneous water heater is installed, the location is extremely small and many users cannot accept the increase in the size of the outdoor unit. Therefore, for example, the effect when the small motor-integrated pump of the eighth embodiment is applied to the outdoor unit is extremely high.

  Moreover, since it is constructed in a narrow place, the workability of the installer is improved as the weight of the outdoor unit is lighter. For this reason as well, a light weight is effective, for example, when the motor-integrated pump of the eighth embodiment is mounted.

  Moreover, in this Embodiment, the motor with a built-in circuit of Embodiment 8 is mounted also in the air blower 104 of the heat pump hot water supply outdoor unit 103, for example. The blower 104 is made of a propeller fan made of resin instead of metal from the viewpoint of weight reduction. Since the propeller fan made of resin is lower in strength than metal, the noise of the motor resonates and is amplified. Therefore, when a conventional motor is used, noise generation due to electric corrosion appears very markedly. Therefore, the effect when the circuit built-in motor of Embodiment 8 is applied to a fan motor is high.

  By applying a low-cost built-in drive circuit motor that achieves both the electric corrosion reliability and the low noise described in the eighth embodiment to the pump motor or the blower motor in the heat pump hot water supply outdoor unit 103 or the hot water storage hot water storage unit, Compared with the case of mounting the motor, a low noise device can be obtained.

  Further, in the case of a motor with a built-in circuit having a high noise level, it has been necessary to arrange a shielding plate around the motor in a conventional water heater. In such a case, for example, when the circuit built-in motor described in the eighth embodiment is applied, the direct material cost and the processing cost for mounting the shielding object of the device are not necessary, and a low-cost device can be obtained.

  Needless to say, the motor described in the first to seventh embodiments or the motor-integrated pump described in the eighth embodiment or the motor thereof can be applied to devices other than an air conditioner, a water heater, and a heat source device.

  The present invention is suitable for a motor with a built-in power conversion circuit configured using a semiconductor, and a device in which the motor is mounted.

1 Printed circuit board 2 Inverter IC
2a Inverter main element 3 Stator 4 Mold resin part 5 Motor terminal 6 Hall element 7 Motor external connection lead 8 Rotor through hole 9-1, 9-2 Bearing 10 Bearing through hole 11 Predrive IC
12, 41, 43 Copper foil 16 Rotor 17 Bearing housing 18 Shaft 20 IC chip 21 Bonding wire 22 Metal lead frame 23 IC package 24 Metal electrode 26 Notch portion 27 Oscillator circuit portion wiring 31 Speed output 32 Output voltage command 34 IGBT
36 Charge pump diode 38 High-voltage DC power supply 39 Neutral point connection 40 Sub-board 42 Sheet metal 44 Conductive tape 50 Motor 51 Pump 60 Air conditioner indoor unit 61 Indoor fan 62 Air conditioner outdoor unit 63 Blower 64 Refrigerant pipe 65 Shaft 66 Impeller 67 Pump housing 68 Elevated partition 69a, 69b Shaft support 71 Indoor fan 72 Indoor heat exchanger 73 Air outlet 74 Air outlet 75 Air intake port 76 Hot water storage tank 77 Hot water supply pipe 78 Water supply pipe 79 Water supply port 80 Pressure reducing valve 81 Piping 82 Boiling pump 83 Heat source part 84 Shower 85 Curan 86 Bath 87 Bath hot water mixing valve 88 Bath hot water thermistor 89 Bath pouring valve 90 Circulation pump 91 Reheating heat exchanger 92 Reheating thermistor 93 Reheating pump 94 Bath thermistor 95 Bathroom remote control 96 operation unit 97 Indicator 99 Water level sensor 100 Water supply branch pipe 101 Hot water supply mixing valve 103 Heat pump hot water supply outdoor unit 104 Blower 105 Air refrigerant heat exchanger 106 Water refrigerant heat exchanger 107 Compressor 108 Electrical storage box 111 Suction port 111a Outdoor unit base 111b Machine room 111c Blower chamber 111d Partition plate 111e Front surface portion 111f Rear surface portion 111g Upper surface portion 111h Right side surface portion 111k Left side surface portion 112 Discharge port 121 Service panel

Claims (15)

A stator,
A rotor that is rotatably arranged inside the stator and has a shaft in the center;
A bearing that supports the shaft;
An inverter circuit that converts AC power for rotating the rotor from a DC power source;
A control circuit that outputs a control signal for controlling the inverter circuit and includes an oscillation circuit unit that generates a clock signal used when generating the control signal;
A printed circuit board disposed perpendicular to the axial direction of the shaft, the inverter circuit and the control circuit are mounted, and the control circuit is disposed on the stator side;
The stator and the printed circuit board are embedded and molded integrally with a resin, the rotor is housed therein, and a mold resin portion that holds the bearing;
Wiring connected to at least the oscillation circuit unit and the oscillation circuit unit when viewed in a plan view from a direction perpendicular to the surface of the printed circuit board provided in the printed circuit board and embedded in the mold resin unit Printed circuit board copper foil arranged to cover,
It makes the chromophore at the distal end over data with a. The printed circuit board copper foil, the motor according to 請 Motomeko 1 that are located on the opposite side on the surface and the stator side of the printed circuit board. The printed circuit board has a child board mounted on the surface opposite to the stator side,
The printed circuit board copper foil, the motor according to Der Ru請 Motomeko 1 that is formed on the surface of the child board. The printed circuit board copper foil, the motor according to 請 Motomeko 1 that provided on the inner layer of the printed circuit board. The inverter circuit is mounted on the surface of the printed circuit board on the stator side,
The printed circuit board copper foil, when viewed in plan from a direction perpendicular to the plane of the printed circuit board, the motor according to 請 Motomeko 1 the inverter circuit also being arranged to cover. First and second ball bearings provided at both ends of the shaft for rotatably supporting the shaft;
A bearing housing portion formed of the resin as a part of the mold resin portion and holding the first ball bearing;
With
The printed circuit board to any one of 請 Motomeko 1 to 5 that are arranged substantially perpendicular to the axial direction at between the first ball bearing between the stator in the axial direction of the shaft The motor described. A metal bracket that is fitted into the mold resin portion so as to close the mold resin portion in which the rotor is housed and the second ball bearing is fitted inside;
The motor according to 請 Motomeko 6 laminated steel sheet that has been used for the back yoke of the rotor. The bearing motor according to any one of 5 請 Motomeko 1 Ru der sleeve bearings. Wherein the control circuit, the motor according to 請 Motomeko 8 that is arranged directly above the stator in the axial direction. Wherein the control circuit, the motor according to the semiconductor chip using the wide band gap semiconductor from including請 Motomeko 1 in any one of 5. The wide band gap semiconductor, silicon carbide, motor according to Oh Ru請 Motomeko 10 gallium nitride or diamond. Lupo pump motor is equipped according to any one of claims 1 to 5. Air conditioner pump described that is equipped on the motor or claim 12 according to any one of claims 1 to 5. Hot water supply device pump that is equipped according to motor or claim 12 according to any one of claims 1 to 5. Heat source machine pumps described that is equipped on the motor or claim 12 according to any one of claims 1 to 5.

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