JP5173877B2 - Power conversion device, motor with built-in drive circuit, and ventilation fan, air conditioner indoor unit, air conditioner, pump, and water heater equipped with the pump - Google Patents

Description

  The present invention relates to a power conversion device, a motor with a built-in drive circuit, a ventilating fan equipped with the motor with a built-in drive circuit, an indoor unit of an air conditioner, an air conditioner, a pump, and a water heater equipped with the pump. Is.

  The output of a conventional Hall element sensor that detects the rotor of the rotor of the inverter and the motor as a motor drive device and motor using a DC voltage obtained by smooth rectification of a commercial AC power source as a power source. A peripheral circuit including a PWM signal forming circuit that is supplied with a signal and a speed command signal to form a PWM signal is composed of two independent ICs and a power conversion circuit in which switch elements are integrated. There is a device that controls the number of rotations of a rotor by supplying power to a motor driving winding of a stator of a motor from a high-voltage DC voltage obtained by rectifying and smoothing a commercial AC voltage by switching the element (for example, Patent Document 1). reference).

JP 2003-333880 A (page 6, FIG. 1)

However, in the conventional power conversion circuit disclosed in Patent Document 1, it is necessary to implement high voltage wiring between a high voltage gate driver IC and a high voltage switch element on a printed circuit board. There is a problem that the power conversion circuit using the monolithic IC becomes significantly larger.
For small motors with a diameter of Φ100 mm or less used in indoor units of home air conditioners with a depth of 150 mm to 300 mm, it is necessary to mount the Hall element sensor on the stator side, and other parts are mounted on the surface of the stator side of the printed circuit board. There was also a problem that the mounting space was remarkably reduced.
In addition, in order to magnetically couple the Hall element sensor and the stator, it is necessary to bring the printed circuit board and the stator close to each other, and a hole that pierces the bearing is inevitably necessary. There is also a problem that the space for placing or wiring with a copper pattern is remarkably reduced.
In order to save mounting space, it is possible to mount components on both sides of the printed circuit board. However, when using surface mount components that are small and easy to increase the mounting area, it is necessary to mount the surface mount components on both sides. In this case, there is a problem that the soldering process is two steps and the cost is high.
And in order to increase the degree of mounting, when a dedicated IC, microcomputer, gate driver IC, Hall element sensor, resistor, capacitor, etc. are arranged on both sides of the substrate as a surface mounting component, when the substrate is integrated with the stator and molded, There is also a problem that the solder used to electrically connect the surface mounting component on the side opposite to the stator and the printed board is likely to break when used for a long time due to the heat shrinkage stress of the resin.

In recent years, motors equipped with a stator core with a diameter of Φ100 mm or less, which is used in large quantities for home air conditioner blowers, have been diverted and applied to fan motors for commercial air conditioners. The output current of the motor is increasing while the circuit board remains below 100 mm. Therefore, the device current passing through the device is also increasing.
In Patent Document 1, there is a description that using a MOSFET as a switching element results in a lower loss than the IGBT, but in reality, this is true under the following conditions.

I <VCEsat / Ron (1)
I: Switch element current VCEsat: IGBT ON voltage Ron: MOSFET ON resistance

  Therefore,

  I> VCEsat / Ron (2)

  Under the condition of the above formula (2), it is better to use the IGBT.

The present invention has been made to solve the above-described problems, and a first object is to provide a power conversion device that can effectively use a stator side surface for mounting low-voltage components, and a power conversion device including the same. To get a built-in motor with built-in drive circuit.
A second object is to obtain a power converter that can reduce the burden of soldering a circuit on a printed circuit board and reduce the manufacturing cost, and a motor with a built-in drive circuit incorporating the power converter.
In addition, the third purpose is to collect surface mount parts that can easily break solder against stress on the surface on the stator side, and have a highly reliable power conversion device with high solder life against heat history and built-in it. To obtain a motor with a built-in drive circuit.
A fourth object is to obtain a ventilation fan, an air conditioner indoor unit, an air conditioner, a pump, and a water heater equipped with the pump.

A power conversion device according to the present invention includes a sensor that detects rotation of a brushless motor having a stator, a peripheral circuit that receives an output signal of the sensor and an external command signal, generates a control signal, and outputs the control signal. And a power circuit that rotationally drives the brushless motor based on the control signal of the peripheral circuit, and a substrate on which the sensor, the peripheral circuit, and the power circuit are mounted. is disposed so as to face the stator, and are sealed with resin together with the stator, the sensors and the peripheral circuit is a surface mount components, said surface mount components, a surface of the stator side of the substrate aggregated is implemented in the power circuit is a lead component, the lead parts of the stator side of the substrate Characterized in that it is implemented by aggregating on the surface of the contralateral.

According to the power conversion device of the present invention, the surface on the stator side can be effectively used for mounting the low voltage component by disposing the high voltage component on the surface on the side opposite to the stator of the printed circuit board.
Also, by collecting surface mount components on the surface of the printed circuit board on the stator side and collecting lead components on the surface on the anti-stator side, the circuit board soldering operation can be performed only once on the surface on the anti-stator side. In addition, the manufacturing cost of the power conversion device can be reduced.
Furthermore, by consolidating the high-voltage components into the power IC, and arranging the power IC on the surface of the printed circuit board opposite the stator side, surface mount components that are susceptible to stress breakage can be collected on the surface of the stator. A highly reliable power conversion device having a high solder life with respect to the thermal history can be obtained.

It is a circuit diagram of the power converter device concerning Embodiment 1 of the present invention. 1 is a structural diagram of a power conversion device according to a first embodiment of the present invention. It is a figure which shows the material removal of the printed circuit board in the power converter device which concerns on Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of a drive circuit built-in motor on which a power conversion device according to Embodiment 1 of the present invention is mounted. It is a structure figure of the power converter device which concerns on Embodiment 2 of this invention. It is a structure figure of the power converter device which concerns on Embodiment 3 of this invention. It is a structure figure of the motor with a built-in drive circuit carrying the power converter concerning Embodiment 3 of the present invention. It is structural drawing of the ventilation fan carrying the drive circuit built-in motor which concerns on Embodiment 4 of this invention. It is a whole external view of the air conditioner which concerns on Embodiment 5 of this invention. It is a cross-sectional view of the indoor unit in the same air conditioner. It is a whole water heater block diagram concerning Embodiment 6 of the present invention.

Embodiment 1 FIG.
(Circuit configuration of power converter)
1 is a circuit diagram of a power conversion apparatus according to Embodiment 1 of the present invention.
In FIG. 1, a high voltage power source 1 having a direct current of 100 V to 350 V rectified from a commercial power source and a low voltage power supply line 2 to which a low voltage stabilized power source of DC 20 V to 3.3 V is supplied are connected to a power IC 7. In addition, a pulse corresponding to the rotation speed of the motor 8 driven by the command input terminal 3 and the power IC 7 to which an output voltage command from a control microcomputer (not shown) or the like or a rotation speed command of the motor 8 described later is input is output. The FG signal output terminal 4 is provided in a dedicated IC or a microcomputer (hereinafter referred to as a dedicated IC 6) made of a low breakdown voltage PN junction process semiconductor.

  The dedicated IC 6 is connected to a Hall IC 5 that detects the rotation of the motor 8 and outputs a pulse according to the magnetic pole position of the rotor. Further, the dedicated IC 6 generates power and transmits a gate signal for determining the ON / OFF state of the switch element 12 to the switch element 14 to be described later based on the command input inputted from the command input terminal 3. It is connected to an HVIC (gate drive IC) 9 made by a high voltage PN junction process mounted on a metal lead frame inside the IC 7 and sealed with resin. For the insulating portion of the HVIC (gate drive IC) 9, PN junction isolation or dielectric isolation is used. When PN junction isolation is used, an IC can be obtained at a lower cost than dielectric isolation, and when dielectric isolation is used, high reliability is obtained that is latch-up free compared to PN junction isolation. Further, the dedicated IC 6 is a high-breakdown-voltage PN mounted inside the power IC 7 and sealed with resin in order to generate and transmit a low-voltage gate signal that determines the ON / OFF state of the switch elements 15 to 17 described later. It is connected to an LVIC (gate drive IC) 10 made by a bonding process.

  Inside the power IC 7, a bootstrap diode 11 for generating a power source for generating a high potential side gate signal in the HVIC (gate drive IC) 9 is sealed. The output side of the HVIC (gate drive IC) 9 is connected to the gate side of the switch elements 12 to 14 made by a high breakdown voltage PN junction process. The switch elements 12 to 14 are switch elements connected between the high potential (positive) side of the high-voltage power supply 1 and a winding of a motor 8 such as a brushless motor. As described above, when the switch element 12 to the switch element 14 are MOSFETs when I <VCEsat / Ron and IGBTs when I> VCEsat / Ron, the steady loss of the switch elements is reduced. Further, the gate terminals of the switch elements 15 to 17 are connected to the output side of the LVIC (gate drive IC) 10. The source sides of the switch elements 12 to 14 are connected to the drain sides of the switch elements 15 to 17, respectively, and the source sides of the switch elements 15 to 17 are connected to the high-voltage power supply 1. Connected to the low potential (negative) side.

  As described above, the power supply is supplied from the high-voltage power supply 1 and the low-voltage power supply line 2, and the command input terminal 3 and the FG signal output terminal 4 for performing communication with the outside are provided, and the Hall IC 5, the dedicated IC 6 and the power IC 7 are mounted. The printed circuit board is provided, and the printed circuit board is disposed in the vicinity of a later-described stator of the motor 8, electrically coupled, integrated, and sealed with resin to constitute a motor 18 with a built-in drive circuit.

  The dedicated IC 6 generates a gate signal based on the command input inputted from the command input terminal 3, and the HVIC (gate drive IC) 9 and the LVIC (gate drive IC) 10 in the power IC 7 are based on the gate signal. The HVIC (gate drive IC) 9 performs ON / OFF operations of the switch elements 12 to 14 and the LVIC (gate drive IC) 10 performs ON / OFF operations of the switch elements 15 to 17. An AC voltage is supplied to the motor 8 by the ON / OFF operation of the switch elements 12 to 17, and current flows through the stator winding in the motor 8 due to the AC voltage, and the magnetic flux generated by the winding current and the rotor A rotational torque is generated in a motor shaft (not shown) by a repulsive force (not shown), and the motor 8 is driven to rotate.

  The sensor described in the claims corresponds to the Hall IC 5, the peripheral circuit corresponds to the dedicated IC 6, and the power circuit corresponds to the power IC 7.

(Structure of power converter)
FIG. 2 is a structural diagram of the power conversion apparatus according to Embodiment 1 of the present invention. Among these, FIG. 2 (a) is a sketch from the stator side, and FIG. 2 (b) is a sketch from the anti-stator side. Both figures are shown reversed left and right so that the positional relationship is easy to understand.
As shown in FIG. 2, the Hall IC 5 and the dedicated IC 6 described above are mounted as surface mounting components on the surface of the half-moon-shaped printed circuit board 21 on the stator side. On the other hand, a motor external connection lead 19 in which input / output lines from the power IC 7 and the printed board 21 are combined is mounted on the surface of the printed board 21 opposite to the stator. The motor external connection lead 19 brings together the power lines of the high-voltage power supply 1 and the low-voltage power supply line 2 in FIG. 1 and the communication lines connected to the command input terminal 3 and the FG signal output terminal 4. A motor terminal 22 for electrical connection with the stator is installed on the peripheral edge of the printed circuit board 21. Further, a motor shaft penetration hole 26 that is a hole for penetrating a motor shaft, which will be described later, is provided in the central portion of the printed circuit board 21. The power conversion device 27 is configured as described above.

In the configuration of the power conversion device 27 as described above, the power IC 7 in which the high-voltage components 9 to 17 are integrated and the motor external connection lead 19 including the high-voltage connection are provided on the surface of the printed board 21 on the side opposite to the stator. Therefore, only the low voltage component can be arranged in the component mounting area on the stator side, and the stator side surface of the small-diameter and half-moon shaped printed circuit board 21 is effectively used for mounting the low voltage component. It becomes possible.
Further, by collecting the surface mounting components on the surface of the printed circuit board 21 on the stator side and collecting the lead components on the surface of the anti-stator side, the soldering operation of the circuit on the printed circuit board 21 can be performed only on the surface on the anti-stator side. The manufacturing cost of the power conversion device 27 can be reduced by one time.
For the switch element 12 to the switch element 17 in the power IC 7 on the printed circuit board 21, whether to arrange the MOSFET or the IGBT is simply replaced at the same position inside the power IC 7. The power conversion device 27 according to the present embodiment can be mounted on a motor mounted in a small-sized home air conditioner or a large-current commercial air conditioner.

  In addition, the board | substrate of a claim is corresponded to the printed circuit board 21 or the printed circuit board 21a mentioned later.

FIG. 3 is a diagram showing material removal of the printed circuit board in the power conversion device according to Embodiment 1 of the present invention.
As shown in FIG. 3, six half-moon shaped printed circuit boards 21 are formed on one rectangular board 28.

  As described above, when a plurality of half-moon shaped printed circuit boards 21 are arranged on the rectangular substrate 28, the material removal is significantly better than the case where the circular substrate is used.

  In addition, the arrangement | positioning of the material pick-up of the printed circuit board 21 on the rectangular board | substrate 28 shown by FIG. 3 is an illustration, It is good also as what takes material by another arrangement | positioning.

(Structure of motor with built-in drive circuit)
FIG. 4 is a structural diagram of a motor with a built-in drive circuit on which the power conversion device according to Embodiment 1 of the present invention is mounted.
As shown in FIG. 4, below the printed circuit board 21, a stator 20 having an outer diameter of 100 mm or less, in which a copper wire or an aluminum wire is wound around a stator core in which electromagnetic steel sheets are laminated, is installed. The substrate 21 is electrically connected by a motor terminal 22. Further, as described above, in the printed circuit board 21, the Hall IC 5 and the dedicated IC 6 are mounted as surface mounting components on the surface on the stator 20 side, and the power IC 7 and the motor are mounted on the surface opposite to the stator 20 side. An external connection lead 19 is mounted and constitutes a power conversion device 27. A mold resin 23 is formed to hold and seal the stator 20 and the power converter 27 in an integrated structure. A bearing housing 24 that is formed of a mold resin and holds a bearing is installed at the center upper portion of the mold resin 23. A rotor penetration hole 25 that is not filled with mold resin is formed inside the annular stator 20. A rotor 30 is installed in the rotor penetration hole 25, and a motor shaft 31 is installed through the center of the rotor 30. The motor shaft 31 passes through a motor shaft penetrating hole 26 of the printed circuit board 21 in order to couple with a bearing (not shown) housed in the bearing housing 24. The drive circuit built-in motor 18 is configured as described above.

In the configuration as described above, the mold resin on the side opposite to the stator 20 side of the printed circuit board 21 is close to the surface of the motor 18 with a built-in drive circuit at a low temperature through the printed circuit board 21 having a large thermal resistance. When an internal / external temperature difference occurs in the motor 18, the temperature gradient is significantly higher than that of other mold resin portions. Therefore, when a temperature difference between the inside and outside of the drive circuit built-in motor 18 occurs, the electronic component on the surface opposite to the stator 20 receives more stress due to thermal contraction of the mold resin than the electronic component on the stator 20 side. However, in the present embodiment, the high voltage components are concentrated in the power IC 7 and the power IC 7 is arranged on the surface on the opposite side of the printed circuit board 21 from the stator 20 side, so that the solder is easily cut off due to stress. All of the components can be collected on the surface on the side of the stator 20, and the power conversion device 27 and the drive circuit built-in motor 18 having a high solder life and high reliability with respect to the thermal history can be obtained.
In addition, by mounting the power IC 7 in which high-voltage components are aggregated on the surface opposite to the stator 20 side of the printed circuit board 21, surface mounting components having high mounting intensiveness can be efficiently arranged on the stator 20 side. The half-moon shaped printed circuit board 21 can be arranged on a circular stator having an outer diameter of 100 mm or less.
Although it is generally known that the on-resistance Ron of the MOSFETs as the switch elements 12 to 17 increases monotonously with respect to the element temperature, in the present embodiment, heat is applied to the stator 20 that is a heat generation source. Since the power IC 7 including the switch element 12 to the switch element 17 is arranged on the surface side of the low-temperature drive circuit built-in motor 18 through the printed circuit board 21 having a large resistance, MOSFETs are provided to the switch element 12 to the switch element 17. When used, it is possible to obtain the power conversion device 27 with particularly low loss.

Embodiment 2. FIG.
(Structure of power converter)
FIG. 5 is a structural diagram of the power conversion apparatus according to Embodiment 2 of the present invention. Among these, Fig.5 (a) is a sketch from a stator side, FIG.5 (b) is a sketch from an anti-stator side. Both figures are shown reversed left and right so that the positional relationship is easy to understand. In the present embodiment, the difference from the first embodiment will be mainly described.
As shown in FIG. 5, the Hall IC 5 and the dedicated IC 6 are mounted as surface-mounted components on the surface of the stator side of the printed circuit board 21a that is circular and has a smaller outer shape than the printed circuit board 21 in the first embodiment. On the other hand, the power IC 7 and the motor external connection lead 19 are mounted on the surface of the printed board 21a opposite to the stator.

(Effect of Embodiment 2)
In the configuration of the power conversion device 27 as described above, the power IC 7 in which the high-voltage components 9 to 17 are integrated and the motor external connection lead 19 including the high-voltage connection are arranged on the side opposite to the stator of the printed board 21a. Therefore, only the low-voltage components can be arranged in the component-mounting area on the stator side, and the stator-side surface of the small-diameter printed circuit board 21a can be effectively used for mounting the low-voltage components. .
In addition, since the printed circuit board 21a has a circular shape and a small diameter instead of a half-moon shape, the drive circuit built-in motor 18 having a smaller diameter than that of the first embodiment can be obtained.

Embodiment 3 FIG.
(Structure of power converter)
FIG. 6 is a structural diagram of a power conversion device according to Embodiment 3 of the present invention. Among these, FIG. 6A is a sketch from the stator side, and FIG. 6B is a sketch from the non-stator side. Both figures are shown reversed left and right so that the positional relationship is easy to understand. In the present embodiment, the difference from the first embodiment will be mainly described.
As shown in FIG. 6, the Hall IC 5, the dedicated IC 6, and the power IC 7 are mounted on the surface on the stator side of the half-moon shaped printed circuit board 21 as surface mounting components. On the other hand, only the motor external connection lead 19 is mounted on the surface of the printed board 21 on the side opposite to the stator.

  In the configuration of the power conversion device as described above, only the motor external connection lead 19 is disposed on the side opposite to the stator of the printed circuit board 21. Although the components are concentrated on the side, the integration efficiency of the printed circuit board 21 is reduced, but the entire power conversion device 27 can be reduced in thickness.

(Structure of motor with built-in drive circuit)
FIG. 7 is a structural diagram of a drive circuit built-in motor on which the power conversion device according to the third embodiment of the present invention is mounted. Here, it demonstrates centering on difference with the structure of the motor with a built-in drive circuit shown in FIG. 4 in Embodiment 1. FIG.
As shown in FIG. 7, in the printed circuit board 21, the Hall IC 5, the dedicated IC 6, and the power IC 7 are mounted as surface mounting components on the surface on the stator 20 side, and on the surface on the opposite side to the stator 20 side. Only the motor external connection lead 19 is mounted. Since the power conversion device 27 shown in FIG. 6 is configured to be thinner than the power conversion device 27 according to the first and second embodiments, the stator core of the stator 20 as shown in FIG. The width is increased. The drive circuit built-in motor 18 is configured as described above.

  By mounting the thinned power conversion device 27 as described above, the width of the stator core in the stator 20 is increased by the thickness of the power conversion device 27 as long as the outer shape of the motor 18 with the same drive circuit is reduced. Thus, the motor 18 with a built-in drive circuit having the same volume and high output can be obtained. Actually, the thickness of the power IC 7 used for a home air conditioner is about 4 mm, whereas the thickness of the stator is about 10 mm. Therefore, when all the 4 mm of the power IC 7 is used for increasing the stacking width, the same outer shape is used. Thus, it is possible to obtain a motor 18 with a built-in drive circuit that has improved torque output by 40%.

  In addition, although the printed circuit board which comprises the power converter device 27 in said description was the half-moon shaped printed circuit board 21, it is not restricted to this, The structure using the circular printed circuit board 21a in Embodiment 2 is used. It is good.

Embodiment 4 FIG.
(Ventilation fan structure)
FIG. 8 is a structural diagram of a ventilation fan equipped with a drive circuit built-in motor according to Embodiment 4 of the present invention.
As shown in FIG. 8, in the circular printed circuit board 21a, the Hall IC 5 and the dedicated IC 6 are implemented as surface mounting components on the surface on the stator 20 side, and the surface on the opposite side to the stator 20 side is illustrated in FIG. The power IC 7 including a diode bridge for rectifying the high-voltage components 9 to 17 and the high-voltage commercial power supply, and a motor external connection lead 19 (not shown) are mounted. A motor shaft penetrating hole 26 (not shown) is provided at the center of the circular printed circuit board 21a. The power conversion device 27 is configured as described above, and the drive circuit built-in motor 18 is configured by the same configuration as the configuration shown in FIG. 4 in the first embodiment.

  The drive circuit built-in motor 18 is covered with a metal barrier 32 on the outer surface. Further, a sirocco fan 34 that is ventilated by centrifugal force is attached to a motor shaft 31 of the motor 18 with a built-in drive circuit. A ventilation fan metal casing 33 is installed so as to be coupled to the metal barrier 32 and to surround the entire sirocco fan 34. The ventilation fan metal casing 33 is installed in a form supported in contact with the ceiling wall 35, for example. Further, the lower surface of the ventilation fan metal housing 33 is opened in order to send air to the sirocco fan 34 for ventilation, and a ventilation fan grill 36 is attached to the lower surface thereof. The ventilation fan 40 is comprised by the above structures.

(Basic operation of ventilation fan)
First, the motor shaft 31 attached to the rotor 30 is rotationally driven by the AC voltage generated by the power converter 27. The sirocco fan 34 attached to the motor shaft 31 also rotates as the motor shaft 31 rotates. The above-described ventilation fan metal casing 33 is connected to a duct (not shown) that leads to a discharge port that discharges air to the outside, and the rotation of the sirocco fan 34 causes indoor air to enter the ventilation fan metal casing 33. In addition, the air flows through the duct and is discharged to the outside through the discharge port.

(Effect of Embodiment 4)
With the above configuration, the inside of the power IC 7 incorporating a rectifier diode bridge for commercial power and other high-voltage components are mounted on the surface of the printed board 21a opposite to the stator 20, and the printed board 21a is circular. As a result, there is a margin in the component mounting area on the surface opposite to the stator 20 side of the power conversion device 27 according to the first to third embodiments, for example, a smoothing capacitor (not shown) ) Can also be mounted on a single printed circuit board 21a. Therefore, it is possible to obtain a motor 18 with a built-in drive circuit that can be mounted on a device such as a ventilation fan that does not take up space for mounting an AC / DC conversion component, and also includes an AC / DC conversion component.

The ventilating fan 40 provided with the drive circuit built-in motor 18 shown in FIG. 8 described above is an example, and the configuration thereof is not limited thereby. For example, the ventilating fan 40 in FIG. 8 is a sirocco fan. Although it is a type, it may be a propeller type or a turbo fan type ventilation fan, and a configuration in which a motor 18 with a built-in drive circuit is mounted thereon may be adopted.
Moreover, in the power converter 27 in the motor 18 with a built-in drive circuit mounted on the ventilation fan 40 according to the present embodiment, the power IC 7 that is a component of the diode has a diode bridge built-in. The motor 18 with a built-in drive circuit including the power conversion device 27 according to the first to third embodiments may be mounted on the ventilation fan 40 without being limited thereto.
Furthermore, the printed circuit board constituting the power conversion device 27 in the above description is the circular printed circuit board 21a, but is not limited to this, and the half-moon shaped printed circuit board 21 in the first or third embodiment. May be used.

Embodiment 5 FIG.
(Structure of air conditioner)
FIG. 9 is an overall external view of an air conditioner according to Embodiment 5 of the present invention, and FIG. 10 is a cross-sectional view of an indoor unit in the air conditioner.
In the air conditioner 100 shown in FIG. 9, the indoor unit 50 is connected to the outdoor unit 60 via the refrigerant pipe 51. The indoor unit 50 incorporates an indoor unit blower 54 to be described later, and the outdoor unit 60 is provided with an outdoor unit blower 61.
Also, as shown in FIG. 10, inside the indoor unit 50, a heat exchanger 52 that performs heat exchange between room air and a refrigerant, and a suction port 53 provided on the upper surface of the indoor unit 50. The indoor unit blower 54 that sucks indoor air into the indoor unit 50 and passes through the heat exchanger 52 to obtain conditioned air that is heat-exchanged and blows the conditioned air into the room is fixed. The heat exchanger 52 has a bent configuration and is installed so as to surround the indoor unit blower 54. The indoor unit blower 54 is a line flow fan fixed in a manner extending in the longitudinal direction of the indoor unit 50. The indoor unit blower 54 is connected to, for example, a drive circuit built-in motor 18 on which the power conversion device 27 according to the second embodiment is mounted in order to drive the rotation thereof. The lower part of the indoor unit blower 54 is formed with the blowout air passage 55 through which the conditioned air circulates, and an air outlet 56 for discharging the conditioned air circulated through the blowout air passage 55 to the outside. It is provided in such a manner that it extends in the lower part of the unit 50 and in the longitudinal direction of the indoor unit 50.

(Basic operation of air conditioner indoor unit)
Next, the basic operation of the indoor unit 50 will be described.
When an operation start of the air conditioner 100 is instructed by a user operating a remote controller or the like, the drive circuit built-in motor 18 connected to the indoor unit blower 54 is driven to rotate, and the indoor unit blower is interlocked with the rotation. 54 is driven to rotate. The indoor air is sucked from the suction port 53 by the rotation of the indoor unit blower 54. The sucked room air further passes through the heat exchanger 52 by continuous rotation of the indoor unit blower 54, and is heat-exchanged with the refrigerant circulating in the heat exchanger 52. The heat exchanger 52 functions as an evaporator when the operation of the air conditioner 100 is a cooling operation, and the refrigerant inside the heat exchanger 52 evaporates, so that the passing indoor air is cooled. On the other hand, in the case of heating operation, it functions as a condenser, and the passing indoor air is heated. Thus, the indoor air sucked into the indoor unit 50 is heat-exchanged by the heat exchanger 52 when passing through the heat exchanger 52, and becomes conditioned air requested by the user. The conditioned air that has passed through the heat exchanger 52 passes through the blowout air passage 55 and is blown into the room from the blowout port 56 by continuous rotation of the indoor unit blower 54. Moreover, the air volume of the conditioned air blown out is adjusted by changing the rotation speed of the motor 18 with a built-in drive circuit connected to the indoor unit blower 54.

(Effect of Embodiment 5)
As described above, the size of the indoor unit 50 is reduced by connecting and mounting the drive circuit built-in motor 18 according to the second embodiment to the air conditioner 100, particularly the indoor unit blower 54 in the indoor unit 50. An air conditioner that can be installed even in a room where the space between the window and the ceiling is narrow can be obtained.
Further, in the air conditioner 100 according to the present embodiment, since the size can be reduced as described above, the indoor unit 50 having a small protrusion from the indoor wall can be obtained and used in the installed room. It is possible to obtain an air conditioner with high design that does not cause a person to feel a feeling of pressure due to the protrusion of the indoor unit 50.

In addition, the structure of the air conditioner 100 provided with the drive circuit built-in motor 18 shown in FIGS. 9 and 10 described above, in particular, the indoor unit 50 is an example, and the structure is not limited by these. .
Further, as the motor connected to the indoor unit blower 54 in the indoor unit 50 of the air conditioner 100 according to the present embodiment, the drive circuit built-in motor 18 on which the power conversion device 27 according to the second embodiment is mounted is used. However, the present invention is not limited to this, and the drive circuit built-in motor 18 on which the power conversion device 27 according to the first, third, or fourth embodiment is mounted is used. Also good.
Furthermore, in the above description, the drive circuit built-in motor 18 has been described as being connected to the indoor unit blower 54 in the indoor unit 50, but is not limited to this, and is not limited to the outdoor unit blower 61 in the outdoor unit 60. It is good also as a structure connected and used.

Embodiment 6 FIG.
(Whole water heater configuration)
FIG. 11 is an overall configuration diagram of a water heater according to Embodiment 6 of the present invention.
The water heater 70 according to the present embodiment includes a refrigeration cycle unit 80 and a heat storage circuit unit 90.
The refrigeration cycle unit 80 includes a compressor 81, a water-refrigerant heat exchanger 82, an expansion valve 83, an air heat exchanger 84, an accumulator 85, and a blower 86 attached to the air heat exchanger 84. In addition, a compressor circuit, a water-refrigerant heat exchanger 82, an expansion valve 83, an air heat exchanger 84, and an accumulator 85 are connected in an annular manner through a refrigerant pipe in this order to form a refrigerant circuit.
The heat storage circuit unit 90 includes a water-refrigerant heat exchanger 82, a tank 91 that stores water heated by the water-refrigerant heat exchanger 82, and a pump 92 that sends out water that has flowed out of the tank 91. A drive circuit built-in motor 18 according to any one of the first to fourth embodiments is connected to the pump 92 in order to drive its rotation. Further, the water pipe connected to the water-refrigerant heat exchanger 82 is separated from the refrigerant pipe of the refrigerant circuit, and is heated by the water-refrigerant heat exchanger 82 and the water-refrigerant heat exchanger 82. A water circulation circuit is formed by sequentially connecting a tank 91 for storing water and a pump 92 for sending out water flowing out of the tank 91 in order by a water pipe.

(Basic operation of the water heater)
First, the basic operation of the refrigeration cycle unit 80 will be described.
The high-temperature and high-pressure gas refrigerant discharged from the compressor 81 flows into the water-refrigerant heat exchanger 82, dissipates heat to the water flowing through the water pipe, performs heat exchange, and condenses. The condensed liquid refrigerant is decompressed by the expansion valve 83, becomes a low-pressure gas-liquid two-phase refrigerant or liquid refrigerant, and flows into the air heat exchanger 84. In the air heat exchanger 84, the low-pressure refrigerant absorbs heat from the outside air sent by the blower 86 and evaporates to become a gas refrigerant. This gas refrigerant is temporarily accumulated in the accumulator 85 and sucked into the compressor 81 again. Thereafter, this operation is repeated.

Next, the basic operation of the heat storage circuit unit 90 will be described.
The water flowing through the water circulation circuit is sent to the water-refrigerant heat exchanger 82 by the pump 92, and is warmed by heat radiation from the refrigerant circuit in the water-refrigerant heat exchanger 82. The warmed water flows into the tank 91 and is stored. The water stored in the tank 91 is sent to the pump 92 again. Thereafter, this operation is repeated.

(Effect of Embodiment 6)
With the above configuration, a water heater provided with the drive circuit built-in motor 18 having the same effects as those of the first to fourth embodiments can be obtained.

  In addition, the structure of the water heater 70 provided with the drive circuit built-in motor 18 shown in FIG. 11 demonstrated above is an illustration, and the structure is not limited by these.

  1 High Voltage Power Supply, 2 Low Voltage Power Supply Line, 3 Command Input Terminal, 4 FG Signal Output Terminal, 5 Hall IC, 6 Dedicated IC, 7 Power IC, 8 Motor, 9 HVIC (Gate Drive IC), 10 LVIC (Gate Drive IC) ), 11 Bootstrap diode, 12 to 17 switch element, 18 Motor with built-in drive circuit, 19 Motor external connection lead, 20 Stator, 21, 21a Printed circuit board, 22 Motor terminal, 23 Mold resin, 24 Bearing housing, 25 For rotor penetration Hole, 26 Motor shaft through hole, 27 Power conversion device, 28 Rectangular substrate, 30 Rotor, 31 Motor shaft, 32 Metal barrier, 33 Ventilation fan metal housing, 34 Sirocco fan, 35 Ceiling wall, 36 Ventilation fan grill, 40 Ventilation fan, 5 Indoor unit, 51 Refrigerant piping, 52 Heat exchanger, 53 Suction port, 54 Indoor unit blower, 55 Air outlet, 56 Outlet, 60 Outdoor unit, 61 Outdoor unit blower, 70 Water heater, 80 Refrigeration cycle unit, 81 Compression Machine, 82 water-refrigerant heat exchanger, 83 expansion valve, 84 air heat exchanger, 85 accumulator, 86 blower, 90 heat storage circuit part, 91 tank, 92 pump, 100 air conditioner.

Claims (17)

A sensor for detecting rotation of a brushless motor having a stator;
A peripheral circuit that receives the output signal of the sensor and an external command signal and generates and outputs a control signal;
A power circuit configured by a high-voltage component, and rotating the brushless motor based on the control signal of the peripheral circuit;
A substrate on which the sensor, the peripheral circuit and the power circuit are mounted;
With
The substrate is disposed so as to face the stator , and is sealed together with a resin together with the stator,
Said sensor and said peripheral circuit is a surface mount components, said surface mount components are mounted collectively on the surface of the stator side of the substrate,
The power circuit is a lead component, and the lead component is collectively mounted on a surface of the substrate opposite to the stator side. The power converter according to claim 1, wherein the peripheral circuit is a pre-drive IC or a microcomputer made of a semiconductor with a low withstand voltage PN junction process. The power converter according to claim 1, wherein the power circuit includes a diode bridge for rectifying a commercial power supply. The power converter according to any one of claims 1 to 3, wherein the power circuit is an integrated power IC including a gate drive IC and six switch elements. The power circuit is
Amplifying a control signal input from the peripheral circuit by the gate drive IC;
5. The brushless motor is driven by outputting the amplified control signal to the gate of each of the six switch elements to control the opening / closing operation of the six switch elements. Power conversion device. The power conversion device according to claim 4 or 5, wherein the gate drive IC and the six switch elements are formed by a high voltage PN junction process. Of the six switch elements, three elements have their drains connected to the positive side of the DC power source, and the remaining three elements have their respective sources connected to the negative side of the DC power source. The power converter according to any one of claims 4 to 6, wherein the source of each of the three elements and the drain of each of the remaining three elements are connected to each phase terminal of a drive winding in the brushless motor. . The power conversion device according to any one of claims 4 to 7, wherein among the six switch elements, three or more elements are MOSFETs. The power conversion device according to any one of claims 4 to 7, wherein among the six switch elements, three or more elements are IGBTs. The power converter according to any one of claims 1 to 9, wherein the substrate has a half-moon shape. The said board | substrate is circular. The power converter device in any one of Claims 1-9 characterized by the above-mentioned. The power conversion device according to any one of claims 1 to 11,
A brushless motor having a stator;
With
A motor with a built-in drive circuit, wherein the stator has an outer diameter of 100 mm or less. A ventilation fan comprising the drive circuit built-in motor according to claim 12 . An air conditioner indoor unit comprising the drive circuit built-in motor according to claim 12 . An air conditioner equipped with the drive circuit built-in motor according to claim 12 . A pump comprising the drive circuit built-in motor according to claim 12 . A water heater equipped with the pump according to claim 16 .

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