JP6274995B2 - Reciprocating rotary sensor and air conditioner indoor unit equipped with the same - Google Patents

Description

  The present invention relates to a reciprocating rotary sensor that detects heat (for example, a resident) and an indoor unit of an air conditioner including the same.

  In recent years, indoor units of air conditioners, particularly indoor units installed on walls and the like, have a reciprocating rotary sensor that detects the presence of people and heat sources, that is, a reciprocating rotary infrared sensor, left and right wind direction plates, and up and down wind directions. A board is equipped, and the right and left wind direction plates and the upper and lower wind direction plates are controlled based on the detection result of the infrared sensor, and the air blowing direction is controlled.

  The infrared sensor is attached to a sensor substrate, and the sensor substrate is held by a resin shaft component. The sensor board is connected to a control board that receives the detection result via wiring (sensor lead wire).

  By the way, when pulling out the sensor lead wire of the sensor board from the shaft component that is the movable portion to the fixed portion, the sensor lead wire is pulled out from a place that is off the rotation center of the shaft component, and when the shaft component rotates, the sensor lead wire Some shaft parts are provided with a space to loosen the sensor lead wires so that no load is applied to the shaft parts.

  In addition, the sensor connector and sensor lead wire on the sensor board are placed on the axis that is the center of rotation of the shaft component that is the movable part (hereinafter referred to as “on the center axis”), and the sensor lead wire is placed straight on the shaft component. Some are drawn from the central axis (see, for example, Patent Document 1).

JP2012-42183A (FIG. 6)

  In the case where the sensor lead wire of the sensor board is pulled out from the place away from the rotation center of the shaft component, the reciprocating rotation of the reciprocating rotary type infrared sensor to prevent disconnection due to repeated fatigue, That is, it is necessary to ensure that the sensor lead wire is sufficiently slack in the rotational direction in accordance with the rotational movement of the shaft component. However, when it is necessary to install a reciprocating rotary infrared sensor in an air conditioner indoor unit where space is limited, it is not practical. Furthermore, since the sensor lead wire rubs against its wall surface every time the resin shaft component forming the space rotates, it may be worn out.

  Also, if the sensor connector and sensor lead wire are placed on the center axis of the shaft part that will be the movable part and the sensor lead wire is drawn straight out from the center of rotation of the shaft part, the sensor lead wire However, it is sandwiched and fixed between the tip ends of a lead wire clamp portion constituted by a pair of protrusions protruding in the axial direction from the opposing portion of the inner peripheral surface of the shaft component. However, it may be difficult to arrange the sensor connector on the central axis of the shaft component that becomes the movable part. For example, when the arrangement space of the reciprocating rotation type infrared sensor is limited like an indoor unit of an air conditioner, or by placing the sensor connector on the central axis of the shaft component, the space between the infrared sensor and the light receiving window In this case, there is a possibility that the light receiving range may be narrowed due to a gap. In such a case, the sensor substrate itself must be stored eccentrically from the central axis of the shaft component. In that case, the sensor lead wire is routed to the lead wire clamp portion arranged on the central axis of the shaft component. Therefore, not only the torsional force of the sensor lead wire accompanying the rotational movement of the shaft component but also the tension and deflection of the sensor lead wire are applied to the lead wire clamp part, and the sensor lead wire is composed of only a pair of protrusions. There is a possibility that it will come off from the lead wire clamp part, and reliability cannot be obtained.

The present invention has been made to solve the problem as described above, be accommodated by decentering the sensor substrate from the central axis of the shaft parts, ensures the cell Nsarido line with the central axis of the shaft parts An object of the present invention is to provide a reciprocating rotary sensor that can be held, and an indoor unit of an air conditioner including the same.

A reciprocating rotary sensor according to the present invention includes an infrared sensor that detects heat, a sensor substrate on which the infrared sensor is mounted, a plurality of wires connected to the sensor substrate, a shaft component that houses the sensor substrate, and a shaft component. A mechanism for reciprocally swinging the infrared sensor housed in the shaft component by reciprocating rotation, and the shaft component holds the sensor substrate eccentrically from the rotation center of the shaft component; and A cover for closing the opening of the substrate holding case, and one of the substrate holding case and the cover elastically holds a plurality of wires connected to the sensor substrate on an axis that is a rotation center of the shaft component. The first holding wall is provided, and on the other side, a second holding wall sandwiching the pair of first holding walls from the outside is provided, and the pair of first holding walls is provided. The wiring An inclined surface with a narrower width is provided from the end to be inserted toward the intermediate portion, and the second holding wall is fitted between the pair of first holding walls that are narrowed by the inclined surface. Wiring retaining protrusions are provided .

In reciprocating rotary sensor according to the present invention, be housed by decentering the sensors substrate from the central axis of the shaft part, it is possible to reliably hold the wiring in the center axis of the shaft parts, wire clamp Can be prevented from coming off.

It is a perspective view which shows the indoor unit of the air conditioner provided with the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a disassembled perspective view which shows the indoor unit of the air conditioner provided with the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a perspective view which shows the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a disassembled perspective view which shows the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a perspective view of the state where the wiring handling part of the reciprocating rotation type sensor concerning an embodiment of the invention was removed. It is a front view of the state which removed the axial component fixing | fixed part and design case of the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the axial component and board | substrate of a reciprocating rotation type sensor which concern on embodiment of this invention. It is a rear view which decomposes | disassembles and shows the axial component and board | substrate of a reciprocating rotation type sensor which concern on embodiment of this invention. It is a side view which shows the axial component of the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a schematic diagram which shows the wiring of the axial component of the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a rear view which shows the axial component of the reciprocating rotation type sensor which concerns on embodiment of this invention. It is a schematic diagram which shows the relationship between the wiring drawer | drawing-out part and center axis line of the axial component of the reciprocating rotary sensor which concerns on embodiment of this invention.

The present invention will be described below with reference to illustrated embodiments.
FIG. 1 is a perspective view showing an indoor unit of an air conditioner equipped with a reciprocating rotary sensor according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing an indoor unit of an air conditioner equipped with a reciprocating rotary sensor according to an embodiment of the present invention.
As shown in FIG. 1 and FIG. 2, the indoor unit of an air conditioner equipped with a reciprocating rotary sensor according to an embodiment of the present invention is indoors by an air blower fan (not shown). Room air is sucked from the upper surface suction port 21 of the main body 20 of the machine, and heat is exchanged by the heat exchanger 1 to form cold air or warm air.

  In addition, a reciprocating rotary sensor 40 that detects the presence of heat (a person or a heat source) is installed in a corner on the front side of the lower part of the main body 20 of the indoor unit. When the indoor unit detects the presence of a person or a heat source by the reciprocating rotary sensor 40, the control unit operates the vertical wind direction plate 2 and the left and right wind direction plate 3 from the detection result to control the air blowing direction. .

FIG. 3 is a perspective view showing a reciprocating rotary sensor according to the embodiment of the present invention. FIG. 4 is an exploded perspective view showing a reciprocating rotary sensor according to the embodiment of the present invention. FIG. 5 is a perspective view of the reciprocating rotary sensor according to the embodiment of the present invention with the wiring routing portion removed. FIG. 6 is a front view of the reciprocating rotary sensor according to the embodiment of the present invention with the shaft component fixing portion and the design case removed. FIG. 7 is an exploded perspective view showing the shaft component and the substrate of the reciprocating rotary sensor according to the embodiment of the present invention.
As shown in FIGS. 3 to 7, the reciprocating rotary sensor 40 according to the embodiment of the present invention includes a wiring routing unit 6 that determines a wiring length, an infrared sensor 4 that detects heat (a person or a heat source), and And a sensor substrate 12 on which the infrared sensor 4 is mounted. The sensor board 12 is connected to a control board (not shown) that receives a detection result by a sensor connector 60 and a wiring (sensor lead wire) 50.

  In addition, the reciprocating rotary sensor 40 reciprocally rotates the shaft component 7 via the design case 10 and the design case 10 that covers the outer periphery of the shaft component 7, the resin-made shaft component 7 that houses the sensor substrate 12. And a mechanism (gear mechanism) 70 for reciprocatingly swinging the infrared sensor 4 accommodated in the shaft part 7. The gear mechanism 70 includes a motor 5, a driving side gear 8 that transmits the rotational force of the motor 5, and a driven side that is formed integrally with the end portion of the design case 10 and receives the rotational force of the motor 5 via the driving side gear 8. It is comprised with the gear 10a. Thus, by forming the driven gear 10a integrally with the design case 10, the number of parts can be reduced and the efficiency of the assembly work can be improved.

FIG. 8 is an exploded rear view showing the shaft component and the substrate of the reciprocating rotary sensor according to the embodiment of the present invention. FIG. 9 is a side view showing a shaft component of the reciprocating rotary sensor according to the embodiment of the present invention. FIG. 10 is a schematic diagram showing wiring of shaft components of the reciprocating rotary sensor according to the embodiment of the present invention. FIG. 11 is a rear view showing shaft parts of the reciprocating rotary sensor according to the embodiment of the present invention. FIG. 12 is a schematic diagram showing the relationship between the wiring lead portion of the shaft component of the reciprocating rotary sensor according to the embodiment of the present invention and the central axis.
As shown in FIG. 7 and FIGS. 8 to 12 described above, the shaft component 7 holds the sensor substrate 12 eccentrically from an axis 100 (hereinafter referred to as “center axis”) that is the rotation center of the shaft component 7. A substrate holding case 11 and a cover 13 that closes the opening of the substrate holding case 11 are provided. On the cover 13, a pair of first holding walls for taking out the wiring connected to the sensor substrate 12, that is, the sensor lead wire 50 from the end surface of the substrate holding case 11 and elastically holding it on the central axis 100 that is the rotation center of the shaft component 7. 30 is provided. The substrate holding case 11 is provided with a second holding wall 31 that sandwiches the pair of first holding walls 30 on the cover 13 side from the outside. In FIG. 12, since only one sensor lead wire 50 is shown, it appears that there is a gap between the pair of first holding walls 30 and the sensor lead wire 50. However, there are actually a plurality of sensor lead wires 50, and by inserting these sensor lead wires 50 between the pair of first holding walls 30, the gap is filled, and the sensor lead wires 50 are connected to the pair of first lead wires 50. One holding wall 30 is elastically held. Therefore, a divergent inclined surface 30a for fitting the sensor lead wire 50 and a gap g are formed on the opposing surfaces at the ends of the pair of first holding walls 30. Further, if one of the plurality of sensor lead wires 50 fitted between the pair of first holding walls 30 escapes from the gap g, a misalignment occurs. A protrusion 31a for preventing a wire from coming off is formed in the space between the inclined surfaces 30a of the first holding wall 30.

  The sensor lead wire 50 is routed from the shaft component 7 to the shaft component fixing portion 9 through the wiring routing portion 6. The shaft component 7 is housed in a design case 10 that covers the outer periphery thereof. Then, the motor 5 is assembled to the shaft component fixing portion 9.

  Here, the first holding wall 30 is provided on the cover 13 side and the second holding wall 31 is provided on the substrate holding case 11 side. However, these relations may be reversed, and the substrate holding case 11 side. The first holding wall 30 may be provided, and the second holding wall 31 may be provided on the cover 13 side.

Next, the operation will be described.
In the reciprocating rotary sensor 40 configured in this way, as shown in FIG. 5, the shaft case 7 housed in the design case 10 is obtained by causing the motor 5 to reciprocate the design case 10 by a predetermined angle. And the infrared sensor 4 is swung back and forth.

  The sensor lead wire 50 connected to the reciprocating rotary sensor 40 is taken out from the groove between the first holding walls 30 around the central axis 100 of the cover 13, and when the substrate holding case 11 is attached, the substrate holding case 11 is attached. The second holding wall 31 sandwiches the first holding wall 30 from the outside and suppresses the opening of the first holding wall 30. As a result, the sensor lead wire 50 can be firmly held on the axis (center axis 100) serving as the rotation center of the shaft component 7. For this reason, the sensor substrate 12 can be accommodated eccentrically from above the central axis 100 of the shaft component 7 in accordance with the light receiving window, and the light receiving range is not narrowed. Even if the sensor substrate 12 is housed eccentrically from the central axis 100 of the shaft component 7, the twisting force, tension, or deflection of the sensor lead wire 50 accompanying the rotation operation of the shaft component 7 can be reduced. Therefore, the sensor lead wire 50 can be prevented from coming off the clamp.

  Further, the sensor lead wire 50 of the sensor substrate 12 is twisted on the central axis in accordance with the rotational operation of the reciprocating rotary sensor 40, but it is not shaken so much by the rotation of the reciprocating rotary sensor 40. The variation in the wiring length reduces the sensor lead wire 50 from coming into contact with the side wall of the shaft part and wears it off, and reduces noise caused by the contact.

  Further, since the sensor lead wire 50 is stored on the central axis 100 of the reciprocating rotary sensor 40, it is not necessary to provide a mechanism for preventing a wire breakage due to repeated fatigue. Therefore, the effect that space can be saved is obtained.

  In addition, according to the embodiment of the present invention, since the reciprocating rotary sensor 40 is used as a sensor for detecting the presence of heat (a person or a heat generation source) in an indoor unit of an air conditioner, the reliability of the wire connection portion A high indoor unit can be obtained.

  DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 Up-and-down wind direction board, 3 Left and right wind direction board, 4 Infrared sensor, 5 Motor, 6 Wiring routing part, 7 axis parts, 8 Drive side gear, 9 Axle part fixing part, 10 Design case, 10a Drive side gear , 11 Substrate holding case, 12 Sensor substrate, 13 Cover, 20 Indoor unit body, 21 Indoor unit upper surface inlet, 22 Outlet, 30 First holding wall, 30a Inclined surface, 31 Second holding wall, 31a Wiring retaining protrusion, 40 reciprocating rotation sensor, 50 wiring (sensor lead wire), 60 sensor connector, 70 mechanism for reciprocating rocking of infrared sensor (gear mechanism), 100 center axis, g gap.

Claims (3)

An infrared sensor that detects heat;
A sensor substrate on which the infrared sensor is mounted;
A plurality of wires connected to the sensor substrate;
A shaft component for housing the sensor substrate;
A mechanism for reciprocally swinging the infrared sensor housed in the shaft component by reciprocatingly rotating the shaft component;
The shaft component includes a substrate holding case that holds the sensor substrate eccentrically from the rotation center of the shaft component, and a cover that closes an opening of the substrate holding case,
One of the substrate holding case and the cover is provided with a pair of first holding walls that elastically hold the plurality of wires connected to the sensor substrate on an axis serving as a rotation center of the shaft component. And the other is provided with a second sandwiching wall sandwiching the pair of first sandwiching walls from the outside ,
The pair of first holding walls are provided with inclined surfaces that narrow the distance from the end portion into which the wiring is fitted toward the intermediate portion,
A reciprocating rotary sensor characterized in that the second holding wall is provided with a wiring retaining protrusion that fits between the pair of first holding walls narrowed by the inclined surface. . A design case that covers the outer periphery of the shaft component;
The mechanism for reciprocatingly swinging the infrared sensor includes a motor and a gear mechanism that transmits the rotational force of the motor,
The reciprocating rotary sensor according to claim 1, wherein a gear receiving a rotational force of the motor is provided at an end of the design case. An indoor unit of an air conditioner provided with a sensor for detecting heat at the bottom of the main body,
An indoor unit of an air conditioner using the reciprocating rotary sensor according to claim 1 or 2 as the sensor.

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