JP2012117729A - Indoor unit of air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of wiring connected to a drive source of an actuator, to prevent the enlargement of a connector on a control substrate connected to the wiring, and to obtain the commonality of the control substrate at apparatuses different in the number of the actuators.SOLUTION: This in-door unit 1 includes: a casing 10; a plurality of flaps 15 arranged at a decoration panel 11; flapping motors M1 to M4; a driver substrate 110 having driver elements D1 to D4 for operating the flapping motors M1 to M4; a microcomputer 101 which is arranged at the casing 10, and outputs drive signals of the flapping motors M1 to M4 to driver elements D1 to D4; and a harness L1 having a control signal line which is connected to the microcomputer 101 and the driver substrate 110, electrically connects at least the microcomputer 101 and the driver elements D1 to D4, and makes the drive signals flow.

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to a technique for driving an actuator such as a flap that changes the blowing direction of conditioned air.

  Conventionally, in order to widen the airflow distribution of conditioned air blown into an air-conditioned room, for example, a ceiling-embedded air conditioner that blows conditioned air in four directions from four outlets has been proposed. In such an indoor unit of an air conditioner, a flap that performs a swing operation to change the wind direction of the conditioned air is provided at each outlet formed in a decorative panel that covers the indoor unit. Each flap is provided with a drive motor on the side of the decorative panel for enabling each individual swing operation. In order to drive and control the operation of the flap composed of the operation mechanism, for example, as shown in Patent Document 1 below, the indoor unit includes a decorative panel from each driver provided on a control board in the main body of the indoor unit. A control signal transmission signal line (harness) is wired for each of the drive motors up to the drive motor on the side.

JP 2000-199639 A

  In the indoor unit of the conventional air conditioner described above, a signal line is wired for each drive motor from each driver on the control board in the indoor unit body to the drive motor on the decorative panel side. The number of wires from the drive motor to the decorative panel increases. For this reason, when the number of ports connected to these wirings increases, the size of the connector on the control board increases. Further, since the harness connecting the control board and the drive motor becomes larger in diameter due to the increase in the number of wirings, it is a factor that deteriorates the installation property when installing the operation mechanism of the flap in the indoor unit. Furthermore, since it is necessary to vary the number of drivers provided on the control board in accordance with the number of flaps provided on the decorative panel, it is difficult to make the control board common to devices having different numbers of flaps.

  The present invention has been made in order to solve the above-described problem. The diameter of the wiring connected to the driver of the actuator driving source from the control board that controls the operation of the actuator is reduced, and the control connected to the wiring is performed. It is an object to make it possible to prevent an increase in the size of a connector on a board, and to make the control board common to devices with different numbers of actuators.

The invention according to claim 1 of the present invention comprises a casing forming an indoor unit body,
A plurality of actuators provided outside the casing;
A drive source provided for each actuator outside the casing to drive the actuator;
A driver board having a driver element that is provided outside the casing and operates the drive source;
A control unit that is provided in the casing and outputs a drive signal for driving the drive source to the driver element;
An indoor unit of an air conditioner, comprising: a harness connected to the control unit and the driver board, and having a control signal line that electrically connects at least the control unit and the driver element to flow the drive signal. .

  In this invention, since the driver board is provided outside the casing together with the actuator and its driving source, the wiring required for each of the plurality of driving sources from the driver element is provided on the driver board disposed outside the casing. It is sufficient to provide between the driver element and the drive source. For this reason, there is no need to use a plurality of wirings for each driving source for the harness control signal lines connected from the control unit provided in the casing to the driver elements on the driver board. It becomes possible to become. In addition, since the control unit does not require a port corresponding to a plurality of wirings for each drive source, the connector required for the control unit and the driver board to connect the control signal lines is reduced by reducing the number of ports. Can be realized. Furthermore, since the control unit is not provided with a driver element, the control unit (control board) can be shared among the air conditioners having different numbers of actuators.

The invention according to claim 2 is the indoor unit of the air conditioner according to claim 1, wherein the drive source is provided for each of the m (m is a natural number of 2 or more) actuators. m n (n is a natural number of 2 or more) phase stepping motors,
The driver board has 2n driver elements and 2n changeover switches,
The 2n changeover switches have one common contact and at least m changeover contacts numbered serially, the common contact is connected to the driver element, and the m changeover contacts are the same. The numbered contacts are connected one-to-one with the positive side or the negative side of each phase of the one driving source,
The harness further includes a switching signal line for flowing a switching signal for electrically connecting the control unit and the switching switch to switch the switching contact of each switching switch to a switching contact of the same number,
The controller further outputs the switching signal to each of the changeover switches.

  In the present invention, in order to control the switching operation of the selector switch on the driver board outside the casing, a control signal line and a switching signal line are provided as the harness, and the driving signal by the control signal line and the switching signal by the switching signal line are provided. It is possible to control which drive source is driven only by outputting to the driver element. Further, in the contact switching control by the changeover switch, each drive source is driven without supplying power to the plurality of drive sources at the same time, so that each drive source can be individually driven with relatively little power.

The invention according to claim 3 is the indoor unit of the air conditioner according to claim 1 or 2, wherein the decorative panel covers the indoor unit main body,
A flap that is provided on the decorative panel as each of the actuators, and changes a wind direction of conditioned air blown out from the indoor unit body into the air-conditioned room;
Provided in the decorative panel as each drive source, and a flap motor for driving the flap;
The driver board is provided on the decorative panel.

  According to the present invention, the control signal line connected from the control unit provided in the casing to the driver element on the driver board does not need to be a plurality of wirings for each flap motor. The diameter of the connector can be reduced, and the connector required for the control unit to connect the control signal lines can be reduced in size. Furthermore, since the control unit is not provided with a driver element, the control unit (control board) can be shared among the air conditioners having different numbers of flaps.

The invention according to claim 4 is the indoor unit of the air conditioner according to claim 1 or 2, wherein the fan sucks air in the air-conditioned room into the casing,
A plurality of dust removing members for removing dust adhering to a filter provided on a member outside the casing as the actuator and capturing dust contained in the air sucked into the casing by the fan; and the plurality as the driving source A dust removing mechanism that is provided for each dust removing member and has a dust removing mechanism motor that drives each dust removing member;
Is provided.

  According to the present invention, the control signal line connected from the control unit provided in the casing to the driver element on the driver board does not need to be a plurality of wirings for each dust removing mechanism motor. The diameter of the harness can be reduced, and the connector required for the control unit to connect the control signal lines can also be reduced in size. Furthermore, since the control unit is not provided with a driver element, the control unit (control board) can be shared even between the air conditioners having different numbers of dust removing mechanism motors.

The invention according to claim 5 is the indoor unit of the air conditioner according to claim 3, wherein a fan that sucks air in the air-conditioned room into the casing;
A plurality of dust removing members for removing dust adhering to a filter provided on a member outside the casing as the actuator and capturing dust contained in the air sucked into the casing by the fan; and the plurality as the driving source A dust removing mechanism that is provided for each dust removing member and has a dust removing mechanism motor that drives each dust removing member;
A dust removal mechanism motor driver board having a dust removal mechanism motor driver element for operating the dust removal mechanism motor;
The dust removal mechanism motor driver board is electrically connected to the control unit via the driver board having the driver element that operates a flap motor as the drive source,
The control unit outputs a drive signal for driving the dust removing mechanism motor to the dust removing mechanism motor driver element via the driver board for operating the flap motor, and the dust removing mechanism. It further controls the drive of the motor.

  According to the present invention, the dust removal mechanism motor driver board is connected to the control unit via the driver board for driving the flap motor, and the control unit is connected to the flap motor driver board via the driver board for the flap motor. Since the drive signal is output to the dust removal mechanism motor driver element to further control the drive of the dust removal mechanism motor, at least the control section of the wiring connecting the control section and the dust removal mechanism motor driver board The harness portion up to the driver board for driving the flap motor can be reduced in diameter without the need to provide control signal lines for the number of dust removal mechanism motors driven by the dust removal mechanism motor driver board. Thus, the connector provided in the control unit for connecting the control signal lines included in the harness can be reduced in size. Furthermore, since the control unit is not provided with a driver element for the dust removal mechanism motor, the control unit (control board) can be shared between the air conditioners regardless of the presence or absence of the dust removal member. Become.

  According to the present invention, it is possible to reduce the diameter of the wiring connected to the driver of the driving source of the actuator from the control board that controls the operation of the actuator and to prevent the connector on the control board connected to the wiring from becoming large. In addition, the control board can be shared by devices having different numbers of actuators.

It is a longitudinal section showing the composition of the indoor unit concerning the embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the structure of an indoor unit, (A) shows a casing, (B) shows a cover member, (C) shows a decorative panel. It is a perspective view which shows the structure of the partition plate of an indoor unit, an air filter, and a dust storage container. It is the schematic which shows the drive control system of the flap in an indoor unit. It is the schematic which shows the structure of the driver circuit which drives and controls the motor for flaps. It is the schematic which shows the drive control system of the flap in an indoor unit, and a dust removal unit. It is the schematic which shows the structure of the drive circuit of the flap in an indoor unit, and a dust removal unit.

  Hereinafter, an indoor unit of an air conditioning apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a configuration of an indoor unit according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a perspective view showing the configuration of the indoor unit, in which (A) shows a casing, (B) shows a cover member, and (C) shows a decorative panel. FIG. 4 is a perspective view illustrating configurations of the partition plate, the air filter, and the dust container of the indoor unit.

  The air conditioner includes a refrigerant circuit (not shown) in which a compressor, an outdoor heat exchanger and an expansion valve provided in an outdoor unit, and a heat exchanger 22 provided in the indoor unit 1 are connected by piping. . The refrigerant circuit performs a vapor compression refrigeration cycle by reversibly circulating the refrigerant. In the air conditioner, a cooling operation in which the heat exchanger 22 functions as an evaporator in the refrigerant circuit and a heating operation in which the heat exchanger 22 functions as a condenser in the refrigerant circuit are performed.

  The indoor unit 1 of the air conditioner constitutes a part of the air conditioner and is installed on the ceiling of the indoor space. The indoor unit 1 is a so-called four-way-blowing type ceiling-embedded air conditioner, and the indoor fan 21 and the heat exchanger 22 that constitute the indoor unit 1 include a casing 10 that forms the main body of the indoor unit 1 and the casing 10. The decorative panel 11 is attached so as to cover the entire bottom portion of the casing 10.

  As shown in FIGS. 1 and 2, the indoor unit 1 includes a casing 10 and a decorative panel 11. In the casing 10, an indoor fan 21, a heat exchanger 22, and a drain pan 23 are provided. The cover member 10b is provided with an air filter 30, a filter driving filter motor M5, a dust removing device 50, a dust container 60, a dust transport mechanism 80, and a dust container box 90.

  As shown in FIG. 3A, the casing 10 is formed in a substantially rectangular parallelepiped box shape whose lower side is opened. The cover member 10b is attached to the lower side of the casing 10. As shown in FIG. 3B, a decorative panel 11 is further attached to the lower portion of the cover member 10b. The cover member 10b is also formed in a substantially rectangular parallelepiped box shape whose lower side is open.

  As shown in FIG. 1, a heat insulating material 17 is laminated on the inner surface of the casing 10. A bell mouth 24 is formed on the lower end surface of the casing 10 and communicates with the vent hole 26 of the cover member 10b. Inside the casing 10, an indoor fan 21, a heat exchanger 22 and a drain pan 23 are arranged. The casing 10 is installed in a state where the lower part is inserted through the opening of the ceiling plate.

  The decorative panel 11 is formed in a rectangular plate shape. The plan view shape of the decorative panel 11 is slightly larger than the plan view shape of the casing 10. The decorative panel 11 is attached so as to cover the lower side of the cover member 10b with the seal member 16 interposed therebetween. When the decorative panel 11 is attached to the casing 10, the decorative panel 11 is exposed to the room.

  As shown in FIGS. 1 and 3, the decorative panel 11 is formed with one suction port 13, four air outlets 14, and a cleaner insertion port 18. The suction port 13 is formed in a rectangular shape and is formed in the center of the decorative panel 11. A suction grill 12 formed in a slit shape is fitted into the suction port 13. Each outlet 14 is formed in an elongated rectangular shape. Each blower outlet 14 is formed along each side of the decorative panel 11. Each air outlet 14 is provided with a flap (wind direction adjusting plate) 15. That is, the flap 15 is provided on the decorative panel 11 outside the casing 10. The flap 15 is rotated to adjust the wind direction (the blowing direction). The vacuum cleaner insertion port 18 is formed in a rectangular shape and is formed on the side of the suction grill 12 (see FIG. 3C).

  The indoor fan 21 is a so-called turbo fan. The indoor fan 21 is disposed near the center of the casing 10 and is located above the suction port 13. The indoor fan 21 includes a fan motor 21a and an impeller 21b. The fan motor 21 a is fixed to the top plate of the casing 10. The impeller 21b is connected to the rotation shaft of the fan motor 21a. A bell mouth 24 communicating with the suction port 13 is provided below the indoor fan 21. The bell mouth 24 divides a space upstream of the heat exchanger 22 into an indoor fan 21 side and a suction grill 12 side in the casing 10. The indoor fan 21 is configured to blow out air sucked from below through the bell mouth 24 in the circumferential direction.

  The heat exchanger 22 is configured by a cross fin type fin-and-tube heat exchanger. The heat exchanger 22 is formed in a quadrangular shape in plan view, and is disposed so as to surround the indoor fan 21. In the heat exchanger 22, heat exchange is performed between the refrigerant flowing in the interior and the indoor air (blowing air) sent by the indoor fan 21.

  The drain pan 23 is provided below the heat exchanger 22. The drain pan 23 is for receiving drain water generated by condensation of moisture in the air in the heat exchanger 22. The drain pan 23 is provided with a drain pump for draining drain water (not shown). The drain pan 23 is arranged with a gradient so that drain water is collected at the location where the drain pump is installed.

  The upper end surface of the cover member 10b constitutes a partition plate 25. The partition plate 25 partitions the space between the bell mouth 24 and the suction grill 12 up and down. That is, the partition plate 25 partitions the upstream space of the heat exchanger 22 into a heat exchanger 22 side including the bell mouth 24 and a suction grill 12 side. As shown in FIG. 1, an air filter 30 is provided inside the cover member 10b, and further includes a filter motor M5, a dust removing device 50, a dust container 60, a dust transport mechanism 80, and a dust container box 90. A removal mechanism 500 is arranged.

  In the center of the partition plate 25, a vent hole 26 is formed for the air sucked from the suction port 13 to flow into the bell mouth 24. As shown in FIG. 4, the vent hole 26 is partitioned into a fan shape by four radial members 27 with circular holes extending in the radial direction. The radial members 27 are connected to each other at the center of the circle, and a cylindrical filter rotation shaft 28 protrudes downward at that portion. The filter rotation shaft 28 is a rotation shaft for the air filter 30 to rotate. One radial member 27 is provided with two filter holders 29.

  As shown in FIG. 4, the air filter 30 is disposed below the partition plate 25 and is formed in a disk shape having a size that covers the entrance of the bell mouth 24. Specifically, the air filter 30 includes an annular filter body 31 and a mesh member 37. A gear portion 32 is provided on the outer peripheral surface of the filter body 31. A cylindrical shaft insertion portion 33 supported by six radial ribs 34 is provided at the annular center portion of the filter body 31. That is, each radial rib 34 extends radially from the shaft insertion portion 33. Further, an inner circumferential rib 35 and an outer circumferential rib 36 formed in an annular shape concentric with the filter main body 31 are provided in the inner circle portion of the filter main body 31. The outer circumferential rib 36 is formed with a larger diameter than the inner circumferential rib 35. The mesh member 37 is stretched over the entire inner circle portion of the filter body 31. The air sucked from the suction port 13 passes through the mesh member 37 of the air filter 30 and flows into the bell mouth 24. At that time, dust in the air is captured by the mesh member 37.

  The air filter 30 is urged downward by the above-described filter retainer 29 coming into contact with the circumferential ribs 35 and 36. Thereby, the air filter 30 is pressed against the rotating brush 51 of the dust removing device 50 described later. The rotary brush 51 is rotationally driven using a brush motor M6 as a drive source. Therefore, the removal efficiency by the dust removal mechanism 500 is improved. The dust removing mechanism 500 further includes a damper that is an air volume adjusting mechanism and a damper motor M7 (described later) that is a driving source thereof.

  As shown in FIG. 4, the air filter 30 is attached by inserting the shaft insertion portion 33 into the filter rotation shaft 28 of the partition plate 25. The air filter 30 is rotatable about the filter rotation shaft 28. A dust container 60 is disposed below the air filter 30. Then, in a state where the air filter 30 is fitted into the shaft insertion portion 33, the filter mounting portion 68 of the dust container 60 is fixed to the shaft insertion portion 33 of the partition plate 25 with a set screw 28 a. As a result, the air filter 30 is held between the partition plate 25 and the dust container 60.

  A filter motor M5 for rotationally driving the air filter 30 is provided in the vicinity of the air filter 30 (see FIG. 2). That is, the filter motor M5 constitutes a moving unit that moves the air filter 30 and the rotating brush 51 relatively.

  Specifically, the filter motor M5 includes a filter drive motor and a limit switch (not shown).

  A drive gear (not shown) is provided on the drive shaft of the filter drive motor, and this drive gear meshes with the gear portion 32 of the filter main body 31. A switch operating portion that is a projecting piece is provided on one end face of the drive gear. The switch actuating portion acts on a lever provided in the limit switch by the rotation of the drive gear. When the switch operating part acts on the lever, the limit switch detects the rotational position of the drive gear.

  As shown in FIG. 3, in the decorative panel 11, swing shafts 3061 are provided at both ends in the length direction of each flap 15 and at the center in the width direction. The swing shaft 3061 is pivotally supported on the inner wall portion 141 of the air outlet 14. Furthermore, a flap motor is provided in the decorative panel 11 portion in the vicinity of each flap 15. The motors provided corresponding to the respective flaps 15 are referred to as flap motors M1 to M4. Each swing shaft 3061 is rotated by the driving force supplied from the flap motors M <b> 1 to M <b> 4, and each flap 15 attached to the swing shaft 3061 rotates as the swing shaft 3061 rotates.

  Next, the drive control system of the flap 15 in the indoor unit 1 will be described. FIG. 5 is a schematic diagram showing a drive control system of the flap 15 in the indoor unit 1.

  The casing 10 of the indoor unit 1 includes an indoor control board 100 on which a control system circuit that controls driving of the indoor unit 1 is mounted. The indoor control board 100 is provided with a microcomputer 101 and a connector 102. The microcomputer 101 includes a CPU and the like, and controls overall operation of the indoor unit 1. The connector 102 has a harness L1 connected to the driver circuit 111 side in order to connect to a driver circuit 111 for driving flap motors M1 to M4 described later provided on the decorative panel 11 side. Connected.

  On the other hand, the decorative panel 11 is provided with a driver board 110 on which a driver circuit 111 and the like for driving and controlling flap motors M1 to M4 that are driving sources of the flap 15 are mounted. The driver board 110 is further provided with a connector 112. The connector 112 is connected to a harness L <b> 1 connected to the indoor control board 100 of the casing 10. The connector 112 is connected to the driver circuit 111 on the driver board 110.

  The harness L1 has control signal lines for outputting drive signals for driving the flap motors M1 to M4 sent from the microcomputer 101 of the indoor control board 100 to the driver board 110 of the decorative panel 11. In this way, the harness L1 is connected between the connector 102 on the indoor control board 100 side and the connector 112 on the driver board 110 side, and the two connectors are connected, whereby the harness L1 is sent from the microcomputer 101 of the indoor control board 100. Driving signals for driving the flap motors M1 to M4 are input to the driver circuit 111.

  Further, the decorative panel 11 is provided with the flap motors M1 to M4 as described above. In the present embodiment, flap motors M <b> 1 to M <b> 4 are provided as drive sources for the four flaps 15. In the present embodiment, two-phase stepping motors are used as the flap motors M1 to M4 (the flap motors M1 to M4 are not limited to the two-phase stepping motors).

  Next, the configuration of the driver circuit 111 for driving control of the flap motors M1 to M4 will be described. FIG. 6 is a schematic diagram showing the configuration of the driver circuit 111 for driving control of the flap motors M1 to M4.

  The driver circuit 111 for driving control of the flap motors M1 to M4 includes a driver element D and a changeover switch S. The driver element D includes four driver elements D1 to D4 in order to drive flap motors M1 to M4 that are two-phase stepping motors.

  Each of the driver elements D1 to D4 is connected to the connector 112 by a drive signal line. The drive signal lines connected corresponding to the driver elements D1 to D4 are referred to as drive signal lines l1 to l4, respectively. The drive signals for driving the flap motors M1 to M4 sent from the microcomputer 101 of the indoor control board 100 by these drive signal lines 11 to 14 and the control signal line of the harness L1 are connected to the driver via the connector 112. Input to each of the driver elements D1 to D4 of the circuit 111.

  The changeover switch S is provided for each of the four driver elements D1 to D4. The changeover switch S includes four changeover switches S1 to S4 provided corresponding to the driver elements D1 to D4.

  Each of the changeover switches S1 to S4 has one common contact C0 and changeover contacts C1 to C4. The common contact C0 of each change-over switch S1 to S4 is connected to a predetermined driver element (in the present embodiment, the number part with the same reference numeral is the same number) among the driver elements D1 to D4. ing.

  Further, each of the switching contacts C1 to C4 of the changeover switches S1 to S4 is a flap motor having the same number among the flap motors M1 to M4 (in the present embodiment, the numeral portions of the reference numerals having the same numbers have the same number). Flap motor) is connected to the positive side or negative side of each phase (that is, one of the first to fourth phases). Each change-over switch S1-S4 switches which of the common contact C0 is connected to the change-over contact C1-C4 according to a switch change-over signal described later.

  Next, control during driving of the flap motors M1 to M4 will be described.

  Driving control of the flap motors M <b> 1 to M <b> 4 is performed by the microcomputer 101 of the indoor control board 100. The microcomputer 101 sends out a drive signal for driving or non-driving each phase of the flap motors M <b> 1 to M <b> 4 for the four flaps 15. This drive signal is output from the microcomputer 101 of the indoor control board 100 to the driver board 110 on the decorative panel 11 side through a control signal line included in the harness L1.

  The switch switching signal sent from the microcomputer 101 of the room control board 100 is input to the driver board 111 via the switching signal line of the harness L1 that connects the connector 102 of the room control board 100 to the connector 112 on the decorative panel 11 side. From 112, it is sent to each change-over switch S1-S4 by a control signal line. This switch switching signal is a signal that indicates which of the switching contacts C1 to C4 is connected to the common contact C in each of the switching switches S1 to S4. As described above, since the changeover switches S1 to S4 are four ports having the changeover contacts C1 to C4, the switch changeover signal is a 2-bit signal.

  That is, the harness L1 has the control signal line and the switching signal line, and outputs the driving signal and the switch switching signal from the microcomputer 101 to the driver circuits 111 and 121.

  For example, when driving the flap motor M1, the microcomputer 101 sends a switch switching signal for connecting the common contact C0 to the switching contact C1, and connects all the common contacts C0 in the changeover switches S1 to S4 to the switching contact C1. In this state, a drive signal for driving the flap motor M1 is sent out. At this time, the microcomputer 101 controls the timing of supplying current to each coil of the flap motor M1 by switching the ON signal or OFF signal and sending it as a drive signal in accordance with 2-phase excitation or 1-2 phase excitation. Then, the flap motor M1 is rotationally driven.

  Similarly, when driving other flap motors, the common contact C0 is connected to the switching contact having the same number as the number of the flap motor to be driven by the switch switching signal. By switching the ON signal or OFF signal according to the 1-2 phase excitation and sending it as a drive signal, the timing of flowing current to each coil of the flap motor to be driven is controlled, and the flap to be driven The motor is rotated.

  According to this configuration, since the driver board 110 and the driver circuit 111 that drive the flap motor are provided on the decorative panel 11 side, the microcomputer 101 uses the harness L1 to switch the common contact C0 among the switching contacts C1 to C4. A switch switching signal for sequentially switching the switching contact to be connected to the switch is sent at a predetermined time interval to be connected to one of the flap motors M1 to M4, and the flap motor that is driven by the connection On the other hand, by sending a drive signal for switching an on signal or an off signal in accordance with two-phase excitation or 1-2 phase excitation, between the indoor control board 100 of the casing 10 of the indoor unit 1 and the decorative panel 11 The flap motors M1 to M4 can be operated at different times without wiring signal lines for the respective flap motors M1 to M4. Were it is possible to sequentially driven. For this reason, the number of ports of the connector 102 of the indoor control board 100 can be reduced, and the diameter of the harness L1 can be reduced. Furthermore, by reducing the number of ports by enabling transmission of drive signals and switch changeover signals in the harness L1, even if the number of flaps 15 varies depending on the model, it can be used for any indoor unit having a different model. In contrast, the indoor control board can be shared. Further, in the contact switching control by the changeover switch S, the flap motors M1 to M4 are driven without simultaneously supplying power to the plurality of flap motors M1 to M4. Motors M1 to M4 can be individually driven.

  Next, the drive control system of the dust removal mechanism 500 will be described in addition to the drive control system of the flap 15 in the indoor unit 1. FIG. 7 is a schematic diagram illustrating a drive control system of the flap 15 and the dust removing mechanism 500 in the indoor unit 1. Note that the description of the same configuration as that already described in FIGS. 5 and 6 is omitted.

  In the indoor unit 1, a dust removing mechanism 500 is disposed at a predetermined position outside the casing 10 (see, for example, FIGS. 1 to 3). The dust removal mechanism 500 includes a driver circuit 121 that drives and controls each mechanism of the dust removal mechanism 500 and a connector 122. A harness L2 connected to the driver board 110 for driving control of the flap 15 is connected to the connector 122. The connector 122 is connected to the driver circuit 121. The harness L2 has a drive signal line, and the harness L2 is connected between the connector 102 on the driver board 110 for driving the flap 15 and the connector 122 on the drive control side of the dust removing mechanism 500, so that both By connecting the connector, the drive signal for driving control of the dust removing mechanism 500 sent from the microcomputer 101 of the indoor control board 100 is used for controlling the driving of the dust removing mechanism 500 via the driver board 110 for driving the flap 15. To the driver circuit 121.

  The driver circuit 121 is connected to and drives the filter motor M5, the brush motor M6, and the damper motor M7. The filter motor M5 is a drive source of the air filter 30. The brush motor M6 is a drive source of the rotating brush 51 of the dust removing device 50. The damper motor M7 is a drive source of a damper that is an air volume adjusting mechanism. In the present embodiment, the air filter 30 is an example of an actuator (dust removal member), and the filter motor is an example of a dust removal mechanism motor. The rotating brush 51 is an example of an actuator (dust removing member), and the brush motor M6 is an example of a dust removing mechanism motor. The damper is an example of an actuator (dust removing member), and the damper motor M7 is an example of a dust removing mechanism motor.

  Furthermore, the driver circuit 121 is connected to the light emitting diode LD, the phototransistor PT, the above-described filter limit switch SW1, and the damper limit switch SW2. The driver circuit 121 controls driving and non-driving of the light emitting diode LD, and switches on / off the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2.

  Further, the output sides of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 are connected to the connector 122 by an input signal line l6. The outputs of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 are sent via the input signal line 16, the harness L2 connected to the connector 122, and the harness L1 connected to the indoor control board 100 on the casing 10 side. Are input to the microcomputer 101 on the indoor control board 100.

  Next, the drive circuit of the flap 15 and the dust removing mechanism 500 in the indoor unit 1 will be described. FIG. 8 is a schematic diagram showing the configuration of the drive circuit of the flap 15 and the dust removing mechanism 500 in the indoor unit 1. The description of the same configuration as that shown in FIG. 6 is omitted. FIG. 8 shows an example in which the driver circuit 111 for driving control of the flap 15 and the driver circuit 121 for driving control of the dust removing mechanism 500 are shared by one driver circuit 200.

  A driver circuit 111 that functions as a driver circuit 111 for driving control of the flap 15 and a driver circuit 121 for driving control of the dust removing mechanism 500 includes a driver element D (D1 to D4) for driving control of the flap 15, Changeover switches S1 to S4, and in addition to this, changeover switches S5 to S8 for driving control of the dust removing mechanism 500 are provided. The driver circuit 200 switches which of the switching contacts C1 to C8 is connected to the common contact C0 according to the switch switching signal described above with reference to FIG.

  The switching switches S1 to S4 for driving control of the flap 15 are provided with a neutral contact Cn1 in addition to the common contact C0 and the switching contacts C1 to C4. When the switch switching signal connects the common contact C0 to the neutral contact Cn1, the flap motors M1 to M4 can be brought into a non-driven state.

  The changeover switches S5 to S8 for driving control of the dust removing mechanism 500 include a switching contact C5 connected to the filter motor M5, a switching contact C6 connected to the brush motor M6, a switching contact C7 connected to the damper motor M7, and a neutral contact. Cn2 respectively. Furthermore, the changeover switch S1 has a contact C8 connected to the light emitting diode LD. The changeover switch S2 has a contact C8 connected to the phototransistor PT. The changeover switch S3 has a contact C8 connected to the filter limit switch SW1. The changeover switch S4 has a changeover contact C8 connected to the damper limit switch SW2. When the switch switching signal connects the common contact C0 to the neutral contact Cn2, each mechanism on the driving side of the dust removing mechanism 500 can be brought into a non-driven state.

  Next, control during driving of the flap motors M1 to M4 and the dust removing mechanism 500 will be described with reference to FIG.

  The microcomputer 101 of the indoor control board 100 performs drive control of the dust removal mechanism 500 in addition to the drive control of the flap motors M1 to M4 described above. The microcomputer 101 includes a filter motor M5, a brush motor M6, a damper motor M7, a light emitting diode LD, a phototransistor PT, a filter limit switch SW1, and a damper in addition to the flap motors M1 to M4 that are the driving sources of the four flaps 15. The limit switch SW2 also sends a drive signal for driving them through the control signal line of the harness L1.

  Further, the microcomputer 101 has a switching signal included in the harness L1 as a switch switching signal that indicates which of the switching contacts C1 to C4 and the neutral contact Cn1 is connected to the common contact C in each of the switching switches S1 to S4. Output by line. The switch change signal is input to each of the changeover switches S1 to S4.

  In addition, the microcomputer 101 has a switching signal that the harness L1 has as a switch switching signal, a signal that indicates which of the switching contacts C5 to C8 or the neutral contact Cn2 is connected to the common contact C in each of the switching switches S5 to S8. Output by line. The switch switching signal is input to each of the switches S5 to S8 via the harness L2.

  That is, in addition to the drive signals for driving control of the flap motors M1 to M4 from the microcomputer 101 and the switch switching signals for the changeover switches S1 to S4, the filter motor M5, the brush motor M6, the damper motor M7, the light emitting diode LD, the photo diode A drive signal for drivingly controlling the transistor PT, the filter limit switch SW1, and the damper limit switch SW2 and a switch switching signal for the changeover switches S5 to S8 are input to the driver circuit 200.

  For example, when driving the filter motor M5, the microcomputer 101 outputs a switch switching signal for connecting all the common contacts C0 in the changeover switches S5 to S8 to the switching contact C5, and drives the filter motor M5 in this state. The drive signal for sending out is sent. At this time, the microcomputer 101 controls the timing of supplying current to each coil of the filter motor M5 by switching an ON signal or an OFF signal and sending it as a drive signal in accordance with 2-phase excitation or 1-2 phase excitation. Then, the filter motor M5 is rotationally driven.

  Similarly, when the brush motor M6 or the damper motor M7 is driven, all the common contacts C0 in the changeover switches S5 to S8 are changed to the changeover contacts having the same numbers as the motors to be driven by the switch changeover signal. By connecting and switching the ON signal or OFF signal according to 2-phase excitation or 1-2 phase excitation and sending it as a drive signal, the timing of flowing current to each coil of the motor to be driven is controlled, The motor to be driven is driven to rotate.

  Further, when driving the light emitting diode LD, the microcomputer 101 sends a switch switching signal for connecting all the common contacts C0 in the changeover switches S5 to S8 to the changeover contact C8, and the common contact C0 is set in all of the changeover switches S1 to S4. Is connected to the switching contact C8, and in this state, a drive signal for turning off all of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 is sent. Note that, when the light emitting diode LD is driven and any one of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 is turned on, the following control is performed.

  When the microcomputer 101 obtains an output signal from any one of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2, the microcomputer 101 sends a switch switching signal for connecting the common contact C0 to the switching contact C8. Thus, the common contact C0 is connected to the switching contact C8 in all of the changeover switches S1 to S4, and in this state, the switch (photophotograph PT, filter limit switch SW1, and damper limit switch SW2 from which the output signal is to be obtained. Any one of the transistor PT, the filter limit switch SW1, and the damper limit switch SW2 (the same applies hereinafter) indicates that the switch is turned on, and sends a drive signal indicating that the other switches are turned off. . Thereby, the input signal line l6 for the microcomputer 101 to obtain an output signal from any one of the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 is sufficient.

  When the flap motors M1 to M4 are driven, if the common contact C0 is connected to the neutral contact Cn2 by all of the switches S5 to S8 on the drive side of the dust removal mechanism 500 by the output of a switch switching signal from the microcomputer 101, dust is generated. Only the flap motors M1 to M4 can be driven with the removal mechanism 500 in a non-driven state, and the common contact C0 in the changeover switches S5 to S8 is connected to the changeover contact corresponding to the mechanism to be driven by the switch changeover signal. By doing so, the flap motors M1 to M4 and the dust removing mechanism 500 can be driven simultaneously.

  On the other hand, when the dust removal mechanism 500 is driven, if the common contact C0 is connected to the neutral contact Cn1 by all the switches S1 to S4 on the drive side of the flap motors M1 to M4 by the output of the switch switching signal by the microcomputer 101, the flap is Only the dust removal mechanism 500 side can be driven with the motors M1 to M4 in a non-driven state, and the common contact C0 in the changeover switches S1 to S4 has the same number as the number of the motor to be driven by the switch changeover signal. By connecting to the switching contact, the dust removing mechanism 500 and the flap motors M1 to M4 can be simultaneously driven.

  According to this configuration, the microcomputer 101 sends a switch switching signal for switching the switching contact to be connected to the common contact C0 among the switching contacts C1 to C8 and the neutral contacts Cn1 and Cn2 by the harnesses L1 and L2. Then, by sending the drive signal to the motor or switch to be driven, the flap control motors M1 to M4 on the decorative panel 11 side, the filter motors, from the indoor control board 100 of the casing 10 of the indoor unit 1 It is possible to drive each of the above-described driving objects without wiring signal lines for each of M5, brush motor M6, damper motor M7, light emitting diode LD, phototransistor PT, filter limit switch SW1, and damper limit switch SW2. . For this reason, even if it is a case where the structure which drives and controls both the motors M1-M4 for flaps and the dust removal mechanism 500 is taken, the number of ports of the connector 112 of the driver board 110 can also be reduced and the harness L1 can be reduced in diameter.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above-described embodiment illustrated in FIGS. 5 and 6, the actuator and the driving source thereof are the flap 15 and the flap motors M <b> 1 to M <b> 4, but the present invention is not limited to this. For example, the actuator and its drive source may be a filter and filter motor M5, a rotating brush 51 and a brush motor M6, a damper and a damper motor M7, and the like. In this case, for example, in the schematic diagram shown in FIG. 6, the change-over switches S1 to S4, the neutral contact Cn1, and the connection configuration between these and the flap motors M1 to M4 are the change-over switch S5 of the dust removing mechanism 500 shown in FIG. S8, the neutral contact Cn2, and the connection configuration of these, the filter motor M5, the brush motor M6, the damper motor M7, the light emitting diode LD, the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2. The microcomputer 101 also has a switch switching signal indicating which of the switching contacts C5 to C8 and the neutral contact Cn2 is connected to the common contact C0 of the changeover switches S5 to S8, a filter motor M5, a brush motor M6, a damper motor M7, and light emission. Driving signals for driving the diode LD, the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 are output, and the switching control of the common contact C0 and the switching contacts C5 to C8 described with reference to FIG. 8 is performed. Switching control is performed.

  In the embodiment described with reference to FIGS. 7 and 8, in the dust removing mechanism 500, the microcomputer 101 and the driver circuit 121 include the light emitting diode LD, the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2. Although the example which controls is shown, this invention is not limited to this. For example, in this case, a configuration in which the microcomputer 101 and the driver circuit 121 do not control the light emitting diode LD, the phototransistor PT, the filter limit switch SW1, and the damper limit switch SW2 is also an embodiment of the present invention.

  The configuration and processing shown in FIGS. 1 to 8 are only one embodiment of the present invention, and the present invention is not limited to this, and can be modified as appropriate.

1 indoor unit 10 casing 11 decorative panel 14 outlet 15 flap 100 indoor control board 101 microcomputer 110 driver board 111 driver circuit 112 connector 121 driver circuit 122 connector 200 driver circuit 500 dust removal unit C0 common contacts C1 to C8 switching contacts D and D1 D4 Driver element L1 Harness L2 Harness M1-M4 Flap motor M5 Filter motor M6 Brush motor M7 Damper motor PT Phototransistor S, S1-S4 Changeover switch SW1 Filter limit switch SW2 Damper limit switch

Claims (5)

A casing forming the indoor unit body,
A plurality of actuators provided outside the casing;
A drive source provided for each actuator outside the casing to drive the actuator;
A driver board having a driver element that is provided outside the casing and operates the drive source;
A control unit that is provided in the casing and outputs a drive signal for driving the drive source to the driver element;
An indoor unit of an air conditioner, comprising: a harness connected to the control unit and the driver board, and having a control signal line that electrically connects at least the control unit and the driver element to flow the drive signal. The drive source is m n (n is a natural number of 2 or more) phase stepping motor provided for each of the m (m is a natural number of 2 or more) actuators.
The driver board has 2n driver elements and 2n changeover switches,
The 2n changeover switches have one common contact and at least m changeover contacts numbered serially, the common contact is connected to the driver element, and the m changeover contacts are the same. The numbered contacts are connected one-to-one with the positive side or the negative side of each phase of the one driving source,
The harness further includes a switching signal line for flowing a switching signal for electrically connecting the control unit and the switching switch to switch the switching contact of each switching switch to a switching contact of the same number,
The indoor unit of an air conditioner according to claim 1, wherein the control unit further outputs the switching signal to each of the changeover switches. A decorative panel covering the indoor unit body;
A flap that is provided on the decorative panel as each of the actuators, and changes a wind direction of conditioned air blown out from the indoor unit body into the air-conditioned room;
Provided in the decorative panel as each drive source, and a flap motor for driving the flap;
The indoor unit of the air conditioning apparatus according to claim 1 or 2, wherein the driver board is provided on the decorative panel. A fan that sucks air in the air-conditioned room into the casing;
A plurality of dust removing members for removing dust adhering to a filter provided on a member outside the casing as the actuator and capturing dust contained in the air sucked into the casing by the fan; and the plurality as the driving source A dust removing mechanism that is provided for each dust removing member and has a dust removing mechanism motor that drives each dust removing member;
The indoor unit of the air conditioning apparatus of Claim 1 or Claim 2 provided with this. A fan that sucks air in the air-conditioned room into the casing;
A plurality of dust removing members for removing dust adhering to a filter provided on a member outside the casing as the actuator and capturing dust contained in the air sucked into the casing by the fan; and the plurality as the driving source A dust removing mechanism that is provided for each dust removing member and has a dust removing mechanism motor that drives each dust removing member;
A dust removal mechanism motor driver board having a dust removal mechanism motor driver element for operating the dust removal mechanism motor;
The dust removal mechanism motor driver board is electrically connected to the control unit via the driver board having the driver element that operates a flap motor as the drive source,
The control unit outputs a drive signal for driving the dust removing mechanism motor to the dust removing mechanism motor driver element via the driver board for operating the flap motor, and the dust removing mechanism. The indoor unit of the air conditioning apparatus of Claim 3 which further controls the drive of a motor.

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