JP2012042183A - Indoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit for an air conditioner causing no obstacle in assembling and service while minimizing influence on appearance by providing a human sensor for ensuring a wide range of a view angle.SOLUTION: A heat exchanger 13 and a blower 14 are stored inside an indoor unit body 1. The front face lower part of the indoor unit body includes the human sensor Z detecting the presence of heat generation of an inhabitant. The human sensor is projected from the wall surface of the indoor unit body and configured to detect while repeating to turn laterally.

Description

  Embodiments described herein relate generally to an indoor unit of an air conditioner.

  A so-called wall-mounted air conditioner indoor unit in which a pyroelectric human sensor for detecting the presence of heat generation in the human body is attached to the indoor unit body is often used. By the detection of the human sensor, it is possible to provide a function to concentrate heat on the resident and blow heat exchange air, or to avoid the part where the resident is present and to blow heat exchange air.

  There are various types of indoor units equipped with this type of human sensor, and in order to expand the detection range, for example, a plurality of human sensors are provided at the upper front of the indoor unit body with different detection angles. There are indoor units and indoor units in which one human sensor is arranged in the center of the front surface of the indoor unit main body without protruding from the wall surface of the indoor unit main body.

JP 2010-169374 A

  Providing a plurality of human sensors increases the cost of parts, complicates assembly and control circuits, and affects costs and service. If one human sensor is attached without protruding from the wall surface of the indoor unit main body, the area around the sensor must be made concave in order to secure the sensor viewing angle. Therefore, if the human sensor protrudes from the indoor unit main body and is fixed, it becomes easy to make contact when the front panel is attached or detached during service.

  This embodiment is based on the above circumstances, equipped with a human sensor that secures a wide range of viewing angles, minimizing the impact on the appearance, and for any obstacles during assembly and service To provide an indoor unit for an air conditioner that can be avoided.

The indoor unit of the air conditioner in this embodiment is
A heat exchanger and a blower are accommodated inside the indoor unit main body.
A human sensor for detecting the presence of heat generated by a resident is provided at the lower front of the indoor unit main body.
The human sensor protrudes from the wall surface of the indoor unit main body and performs detection while repeatedly rotating left and right. When not detected, the human sensor moves backward from the wall surface of the indoor unit main body and is stored inside the indoor unit main body.

The longitudinal cross-sectional view of the indoor unit of the air conditioner based on 1st Embodiment. The external appearance perspective view of the indoor unit based on the embodiment. The external appearance perspective view which expanded the indoor unit principal part based on the embodiment. The external appearance perspective view which expanded the indoor unit principal part of the state different from FIG. 3 based on the embodiment. The longitudinal cross-sectional view of the indoor unit principal part based on the embodiment. The longitudinal cross-sectional view of the sensor assembly which accommodates the human sensitive sensor based on the embodiment. The perspective view which decomposed | disassembled the sensor assembly based on the embodiment. The perspective view which decomposed | disassembled the sensor assembly based on 2nd Embodiment.

The first embodiment will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner, and FIG. 2 is an external perspective view of the indoor unit.
The indoor unit main body 1 includes a rear panel casing 2 and a front panel 3 that is a front casing, and has a horizontally long box shape that is long in the horizontal width direction with respect to the vertical direction. This is a so-called wall-hanging type in which the rear surface portion of the rear plate housing 2 is attached to a mounting plate at a height of the indoor wall surface.

  The rear plate housing 2 constitutes a rear portion of the indoor unit body 1 and a mounting portion for components housed inside on the front side. The front panel 3 includes a front surface portion 3a, left and right side portions 3b, an upper surface portion 3c, and a lower surface portion 3d, and has a box shape with an open back surface. The indoor unit main body 1 is configured by fitting the opening of the front panel 3 into the rear panel housing 2 to which components housed therein are attached.

  Most of the upper surface portion 3 c of the front panel 3 is opened and serves as an upper surface suction port 5. A frame-like crosspiece 6 is fitted into the upper surface inlet 5 and is partitioned into a plurality of spaces by the crosspiece 6 and is always open to the interior of the indoor unit body 1.

  The front part 3a of the front panel 3 is formed with a front decorative panel 4 that shields the front surface, and a front lower suction port 10 is formed on the lower end side of the front decorative panel 4, and the front decorative panel 4 is a hinge formed on the upper left and right It is attached so that it can be opened and closed by a mechanism, and is configured to correspond to maintenance inside the indoor unit body 1.

  A blowout port 11 is formed at a position extending from the lower end side of the front surface portion 3a of the front panel 3 to the front surface side of the lower surface portion 3d. An opening / closing panel 7 is provided in the left-right width direction on the front side of the lower front suction port 10 and the blowout port 11.

  The open / close panel 7 is positioned in a substantially vertical direction when closed, so as to shield the front side of the front lower suction port 10 and the blowout port 11, and when opened, projects forward in a substantially horizontal direction, The front lower suction port 10 is opened to open the front side of the blowout port 11 on the lower surface side, and functions as a partition plate that partitions the front lower suction port 10 side and the blowout port 11 side.

  Further, in the blowout port 11, a single horizontal louver 8 that adjusts the vertical and horizontal air directions of the blown air, and a plurality of vertical louvers that are mounted on the horizontal louver 8 at predetermined intervals. Louvers 9 are provided in the left-right width direction. The horizontal louver 8 is formed so as to shield the opening on the lower surface side of the outlet 11 when closed.

  The open / close panel 7 has a curved cross-sectional shape that is an extension of the curved cross-sectional shape of the front decorative panel 4. Similarly, the horizontal louver 8 also has a curved cross-sectional shape that is an extension of the curved cross-sectional shape of the open / close panel 7. When the air conditioning operation is stopped, the front decorative panel 4, the open / close panel 7, and the horizontal louver 8 are formed with a continuous curved surface and are excellent in aesthetic appearance.

  The horizontal louver 8 opens and closes the outlet 11 according to the rotation posture, and further sets the direction of blowing heat exchange air according to the operating conditions. A plurality of vertical louvers 9 form one set, and each group is rotationally driven simultaneously to change the wind direction in the left-right direction.

  In the indoor unit main body 1, a front heat exchanger portion 13 </ b> A that is curved in a substantially U shape in a side view and a diagonally straight rear heat exchanger portion 13 </ b> B are combined into a substantially inverted V shape. The indoor heat exchanger 13 to be formed is arranged.

  Most of the front heat exchanger portion 13A except the upper end portion faces the front decorative panel 4 with a gap. In particular, the lower end portion of the front heat exchanger portion 13A faces the front lower suction port 10 that is opened and closed by the opening and closing panel 7 with a gap. Almost most of the front side heat exchanger part 13 </ b> A except the lower end part and the rear side heat exchanger part 13 </ b> B are opposed to the upper surface inlet 5.

  An indoor fan 14 is disposed between the front and rear heat exchanger portions 13A and 13B of the indoor heat exchanger 13. The indoor blower 14 includes a fan motor supported by a support and a cross-flow fan fitted on the rotation shaft of the fan motor. The axial length of the fan motor matches the length of the indoor heat exchanger 13 in the width direction and is correctly opposed.

  The lower end portion of the front heat exchanger portion 13A is placed on the front drain pan 15a, and the lower end portion of the rear heat exchanger portion 13B is placed on the rear drain pan 15b. The front and rear drain pans 15a and 15b are integrally formed with the rear plate housing 2, receive drain water dripping from the respective heat exchanger sections 13A and 13B, and can drain the water through the drain hose. .

  The outer surfaces of the side walls of the front and rear drain pans 15a and 15b are provided close to the indoor blower 14, and these constitute a nose for the crossflow fan of the indoor blower 14. A partition wall member 16 connects the side wall portions of the front and rear drain pans 15 a and 15 b that are noses and the side portions of the outlet 11.

  A space surrounded by the partition wall member 16 becomes a blowout air passage 17 that communicates the nose and the blowout port 11 from the indoor blower 14 by driving the indoor blower 14. On the other hand, when the indoor blower 14 is driven, a suction ventilation path 18 extending from the upper surface suction port 5 and the front lower suction port 10 to the indoor blower 14 via the indoor heat exchanger 13 is formed.

  A filter support frame 20 is provided between the front surface portion 3 a and the upper surface portion 3 c of the front panel 3 and the indoor heat exchanger 13. The filter support frame 20 supports an air filter (not shown) by moving it upward or downward. An air filter cleaning unit 21 is attached to face the air filter, and removes and collects dust accumulated in the air filter.

  In particular, as shown in FIG. 2, the front panel 3 is provided with a sensor opening 22 at the side of the outlet 11 provided with the horizontal louver 8. As will be described later, a human sensor Z housed at the tip of the sensor assembly 30 is disposed in the sensor opening 22 so as to protrude.

When the operation start button provided in the remote controller (remote controller) is pressed and an operation start signal is input to the control unit, the air conditioner operation is started.
That is, the open / close panel 7 and the horizontal louver 8 are rotationally driven to open the front lower suction port 10 and the blow-out port 11 which are vertically partitioned by the horizontally projecting open / close panel 7. At the same time, the compressor of the outdoor unit (not shown) is driven, and the cross-flow fan of the indoor blower 14 is rotationally driven to perform a blowing action.

  The refrigeration cycle operation is started as the compressor is driven, and the refrigerant is guided to the indoor heat exchanger 13. By driving the indoor blower 14, indoor air is sucked into the indoor unit body 1 from the upper surface suction port 5 and the lower front suction port 10 and led to the suction ventilation path 18.

  The indoor air sucked into the indoor unit main body 1 flows through the air filter, and dust contained in the indoor air is captured. The cleaned indoor air flows through the indoor heat exchanger 13 and exchanges heat with the refrigerant discharged from the compressor and guided through the refrigeration cycle circuit. When the cooling operation is selected, the air is cool, and when the heating operation is selected, the air is warm.

  Any heat exchange air is guided along the blowout air passage 17, the air direction is deflected by the horizontal louver 8 and the vertical louver 9, and is blown into the room from the blowout port 11. Since the front lower suction port 10 as well as the upper surface suction port 5 is provided, the indoor air flows in a substantially uniform state throughout the indoor heat exchanger 13 and exchanges heat. The intake air volume is increased, and the heat exchange efficiency of the indoor heat exchanger 13 can be improved.

  FIG. 3 is an enlarged view of the human sensor Z shown in FIG. 2 and the periphery of the attachment portion, and shows a state during an air conditioning operation. FIG. 4 is also an enlarged view of the human sensor Z shown in FIG. 2 and the periphery of the mounting portion, but shows a state when the air conditioning operation is stopped.

  As described above, the sensor opening 22 is provided at the side of the outlet 11, and the human sensor Z protrudes from the sensor opening 22 as shown in FIG. 3 during the air conditioning operation. And the human sensor Z repeats rotation to right and left, compares the calorific value dissipated from the resident with the calorific value of the peripheral part of the resident, and detects the presence of the resident.

  The sensor opening 22 is provided in the lower surface 3d of the front panel 3 which is the wall surface of the indoor unit body 1. When a detection signal is input from the remote control to the control unit, the control unit outputs a drive signal so that the human sensor Z protrudes from the front panel lower surface 3d.

Actually, the human sensor Z is housed in a distal end portion of a sensor assembly 30 to be described later, and the distal end portion of the sensor assembly 30 protrudes from a sensor opening 22 provided in the front panel lower surface portion 3d, and is Repeat the rotation. Therefore, the human sensor Z projects from the front panel lower surface portion 3d to perform a detection operation.
There are no visual field obstacles to the human sensor Z, and the human sensor Z can secure a wide viewing angle and improve detection reliability.

  The remote controller has both a function of selecting to blow heat exchange air concentrated on the resident and a function of selecting to blow heat exchange air avoiding the resident. According to the instruction to the remote controller, the position and orientation of the horizontal louver 8 according to the selection is controlled, and the heat exchange air is blown to obtain comfortable air conditioning.

  As shown in FIG. 4, in the first embodiment, the control unit issues a control signal so as to move backward relative to the human sensor Z when the air conditioning operation is stopped. The front end portion of the sensor assembly 30 moves backward to be immersed from the front panel lower surface portion 3d, and the sensor opening 22 is exposed. The human sensor Z is completely housed inside the indoor unit body 1.

  When detaching or attaching the front panel 3, which is an external component, for example during service, the human sensor Z is housed inside the indoor unit body 1 so that it does not obstruct work. Improved workability can be obtained.

FIG. 5 is a diagram illustrating a mounting structure of the sensor assembly 30 including the human sensor Z.
As described above, the opening / closing panel 7 is attached to the front lower suction port 10, and the opening / closing panel 7 opens the front lower suction port 10 during the air conditioning operation shown in the figure. A sensor assembly 30 provided with a human sensor Z at the tip is attached to a side portion of the blowout port 11, and the tip projects from the front panel lower surface 3d.

  The sensor assembly 30 is attached to the indoor unit main body 1 so as to be inclined 35 ° forward as an attachment angle with respect to the vertical axis La of the indoor unit main body 1. As a result of various experiments, it was found that the mounting angle can be detected efficiently and reliably.

6 is a longitudinal sectional view of the sensor assembly 30 in the embodiment, and FIG. 7 is an exploded perspective view of the sensor assembly 30.
In the drawing, reference numeral 31 denotes a sensor case, which constitutes the tip (lower part) of the sensor assembly 30. The sensor case 31 is a cylindrical body having a two-stage diameter in which a small-diameter cylindrical portion 31a is formed from the upper end to the intermediate portion, and a large-diameter cylindrical portion 31b is formed from the intermediate portion to the tip (lower end). The tip of the large-diameter cylindrical portion 31b is a hemispherical hemisphere portion 31c, and a sensor window portion 32 is provided across the large-diameter cylindrical portion 31b and the tip hemisphere portion 31c.

  A sensor substrate 33 is accommodated in the sensor case 31, and a human sensor Z composed of a Furnell lens and a pyroelectric element is mounted on the lower end portion of the sensor substrate 33, and a sensor connector 34 is attached to the upper end portion. The human sensor Z is fitted into the sensor window 32 of the sensor case 31 and can be easily confirmed from the outside of the sensor case 31.

  On the outer peripheral surface of the large-diameter cylindrical portion 31 b of the sensor case 31, a guide projection 35 is projected in the vicinity of the sensor window portion 32. A plurality of guide ribs 36 project from the small-diameter cylindrical portion 31a of the sensor case 31 at predetermined intervals in the circumferential direction, and these guide ribs 36 extend along the axial direction of the small-diameter cylindrical portion 31a. Provided in parallel.

  A lead wire (not shown) is connected to the sensor connector 34. These lead wires extend further upward from the small-diameter cylindrical portion 31a of the sensor case 31 through the opening end. A part of the inner peripheral surface of the sensor case small-diameter cylindrical portion 31a protrudes in the axial direction, and a lead wire clamp portion 37 is formed.

  The outer peripheral surface of the large diameter cylindrical portion 31 b in the sensor case 31 is covered with a guide ring 38. In other words, the sensor case large-diameter cylindrical portion 31 b is rotatably fitted in the guide ring 38. A circular groove 39a is provided along the circumferential direction at the lower end portion of the inner peripheral surface of the guide ring 38, and the lower end portion of the spiral groove 39b is connected to a part of the circular groove 39a.

  The spiral groove 39b is provided on the inner peripheral surface of the guide ring 38 in a spiral manner from a portion where the spiral groove 39b is connected to the circular groove 39a to an upper end portion having a predetermined distance from the upper end edge of the guide ring 38. The guide projection 35 provided on the sensor case large-diameter cylindrical portion 31b is inserted into and engaged with either the spiral groove 39b or the circular groove 39a.

  A part of the guide ring 38 is attached and fixed to a downwardly protruding piece 40d of the receiving case 40 whose upper surface is open. Therefore, the sensor case 31 is rotationally guided in the circumferential direction with respect to the guide ring 38 integral with the receiving case 40, or is rotationally guided in the spiral direction.

  A drive motor 42 as a drive source is attached to the lower surface of the receiving case 40. The drive shaft 42 a of the drive motor 42 protrudes from the upper surface of the receiving case 40 through a hole 40 a provided in the receiving case 40. The receiving case 40 supports the drive gear 43 on the hole 40a. The drive motor drive shaft 42 a is inserted and fitted into the hole of the drive gear 43 on the receiving case 40.

  Further, a driven gear 44 is supported on the receiving case 40, and the driven gear 44 meshes with the drive gear 43. The receiving case 40 that supports the driven gear 44 is provided with an opening 40b having a diameter through which the small-diameter cylindrical portion 31a of the sensor case 31 is freely inserted.

  The driven gear 44 is provided with an inner diameter hole 44a having a diameter slightly larger than the diameter of the sensor case small-diameter cylindrical portion 31a. The driven gear inner diameter hole 44a is provided with a plurality of notches 45 at predetermined intervals in the circumferential direction. The planar view shape of the notch 45 is the same as the planar view shape of the guide rib 36 and is formed to have the same dimensions.

  The upper surface opening of the receiving case 40 that supports the drive gear 43 and the driven gear 44 is closed by a presser cover 47. In other words, the drive gear 43 and the driven gear 44 are rotatably accommodated in the assembly of the presser cover 47 and the receiving case 40.

  A guide cylinder 48 is integrally provided at a position above the driven gear 44 of the presser cover 47. The inner diameter of the guide cylinder 48 is the same as the diameter of the receiving case opening 40b provided in the receiving case 40, and all of the guide cylinder 48, the driven gear 44 and the receiving case opening 40b are aligned at the same position. .

  The sensor case small diameter cylindrical portion 31a has an upper end inserted into the driven gear inner diameter hole 44a via the receiving case opening 40b. And the said guide rib 36 provided in the outer peripheral surface of the small diameter cylindrical part 31a engages with the notch part 45 provided in the driven gear internal diameter hole 44a.

  Therefore, when the driven gear 44 rotates, the rotational force is transmitted to the sensor case small-diameter cylindrical portion 31a through the notch 45 and the guide rib 36, and the sensor case 31 rotates integrally with the rotation of the driven gear 44. .

  However, the sensor case 31 is movable in the axial direction due to the relationship between the notch 45 and the guide rib 36 with respect to the driven gear 44 housed between the receiving case 40 and the presser cover 47 and fixed in position. . Depending on the position of the sensor case 31, the small diameter cylindrical portion 31 a is inserted into the guide cylinder 48 of the presser cover 47.

In this way, the sensor assembly 30 is assembled, and the piece 40d protruding downward of the receiving case 40 is directly attached and fixed to a predetermined portion of the indoor unit body 1. The mounting angle of the sensor assembly 30 is as described above with reference to FIG.
When the sensor assembly 30 is attached to the indoor unit main body 1, the guide protrusion 35 provided on the outer peripheral surface of the sensor case large-diameter cylindrical portion 31 b has the spiral groove 39 b provided on the inner peripheral surface of the guide ring 38. It is engaged with the upper end.

  The sensor window 32 of the sensor case 31 is in a position closed by the lower end of the guide ring 38, and the human sensor Z fitted into the sensor window 32 is covered with the guide ring 38. The sensor case 31 is in a position where it is inserted into the guide ring 38, and as shown in FIG. 4, the human sensor Z is immersed from the front panel lower surface portion 3d.

  When the control unit receives the air conditioning operation start signal, it issues the above-described control signal and also issues a drive signal to the drive motor 42. The drive motor 42 is rotationally driven in a predetermined direction, and the drive gear 43 and the driven gear 44 are rotated. The sensor case 31 rotates integrally with the driven gear 44 because of the engagement relationship between the notch 45 of the driven gear 44 and the guide rib 36 of the sensor case 31.

  On the other hand, the guide protrusion 35 of the sensor case large-diameter cylindrical portion 31b is guided by the spiral groove 39b of the guide ring 38, and the sensor case 31 descends while rotating. Although the position of the driven gear 44 in the vertical direction does not change, the downward movement of the sensor case 31 is smoothly performed without any trouble from the above relationship.

  Even if the guide projection 35 of the sensor case 31 descends to the lower end position of the spiral groove 39b of the guide ring 38, the drive motor 42 continues to be driven, and the guide projection 35 extends from the spiral groove 39b to the circular groove 39a. Move to the engagement position. In this state, the sensor case 31 protrudes from the guide ring 38.

  That is, the sensor window 32 protrudes from the guide ring 38 and the human sensor Z is exposed as shown in FIG. The drive motor 42 continues to rotate by a predetermined number of revolutions even after the sensor case guide protrusion 35 has shifted to the engagement position with the circular groove 39a of the guide ring 38, and is temporarily controlled at that timing.

  The protruding position of the sensor case 31 with respect to the guide ring 38 is not changed, and the rotation is stopped in a state where the sensor case 31 is rotated by a predetermined angle. The drive motor 42 is controlled so as to be driven in reverse. When the guide protrusion 35 reaches a position immediately before reaching the connection position between the circular groove 39a and the spiral groove 39b, the drive motor 42 is controlled to rotate again.

Accordingly, the sensor case 31 is rotated by a predetermined angle in the reverse direction without changing the axial position of the sensor case 31, and further rotated by a predetermined angle in the reverse direction. Thereafter, this operation is repeated. As shown in FIG. 3 again, during the air-conditioning operation, the human sensor Z protrudes from the sensor opening 22 provided in the lower surface portion 3d of the front panel and repeats the rotation to the left and right.
The human sensor Z can detect the presence of a resident and send a detection signal to the control unit to obtain a function selected by the remote controller. This state is continued during the air conditioning operation.

  When receiving the stop signal of the air conditioning operation, the control unit controls the drive motor 42 so that the guide protrusion 35 of the sensor case 31 moves from the circular groove 39a of the guide ring 38 to the continuous position with the spiral groove 39b.

  Then, the control for the drive motor 42 is continued as it is, and a stop signal is issued to the drive motor 42 when the guide projection 35 reaches the upper end of the spiral groove 39b. The human sensor Z returns to the state shown in FIG.

  In this way, the human sensor Z protrudes from the wall surface of the indoor unit body 1 and moves to the left and right, and the human sensor Z moves backward from the wall surface of the indoor unit body 1 to move inside the indoor unit body 1. The drive motor 42 is the same drive source as the drive source to be housed. Therefore, the simplification of the structure can be obtained and the reliability can be improved.

  When the air-conditioning operation is stopped, there is no problem because the human sensor Z is immersed inside the front panel lower surface portion 3d. However, during the air-conditioning operation, the human sensor Z protrudes from the lower surface portion 3d of the front panel. It is possible to do. At this time, if static electricity of the resident affects the sensor substrate 33 on which the human sensor Z is mounted, the detection accuracy of the human sensor Z deteriorates.

  Although the sensor case 31 that houses the human sensor Z is composed of a plurality of parts, the parts divided part does not protrude from the sensor opening 22 during the air conditioning operation. That is, since it does not protrude outside from the front panel lower surface portion 3d, static electricity possessed by the resident does not affect the sensor substrate 33 inside the sensor case 31, and resistance to static electricity is improved.

  In the first embodiment, the human sensor Z protrudes from the wall surface of the indoor unit body 1 and is detected while repeatedly rotating left and right, and when not detected, the human sensor Z is mounted on the wall surface of the indoor unit body 1. However, the present invention is not limited to this.

In the second embodiment, the human sensor Z is always protruded from the wall surface of the indoor unit main body 1 regardless of whether the air conditioning operation is stopped or not, and the mechanism is simplified.
For example, when the front panel 3 is attached / detached at the time of service, when the external force is applied, such as the front panel 3 comes into contact with the human sensor Z, the human sensor Z easily moves backward into the indoor unit main body 1 and receives an impact. Absorbs to prevent damage.

FIG. 8 is an exploded perspective view of the sensor assembly 50 according to the second embodiment.
The sensor case 51 constituting the tip (lower) part of the sensor assembly 50 includes a cylindrical part 51a having the same overall length and a hemispherical part 51b integrally connected to the tip of the cylindrical part 51a. A sensor window 52 is provided across 51a and hemisphere 51b.

  Further, a plurality of notched recesses 53 are provided at equal intervals in the circumferential direction of the cylindrical portion 51a with a predetermined length along the axial direction from the upper end edge of the cylindrical portion 51a of the sensor case 51 toward the hemispherical portion 51b. .

  A sensor base 55 is inserted and fixed in the sensor case 51. At the upper end portion of the sensor base 55, a groove portion 56 having the same width and the same interval as that of the notch recess portion 53 provided in the sensor base 55 is provided. The sensor portion 55 is aligned with the position of the notch recess portion 53. The upper end portion of the base 55 is fitted into the upper end portion of the sensor case 51.

  Further, a window hole 57 having the same shape and the same diameter as the sensor window 52 is provided at the lower end of the sensor base 55. In a state where the sensor base 55 is inserted and fixed in the sensor case 51, the lower end portion of the sensor base 55 is in close contact with the sensor case 51, and the window hole 57 of the sensor base 55 communicates with the sensor window portion 52 of the sensor case 51.

  A sensor substrate 33 is inserted into the sensor base 55. A human sensor Z composed of a combination of a Furnell lens and a pyroelectric element is mounted on the lower end portion of the sensor substrate 33, and a sensor connector 34 is provided on the upper end portion. The sensor substrate 33, the human sensor Z, and the sensor connector 34 are the same components as those used in the first embodiment.

  The human sensor Z is fitted into the window hole 57 of the sensor base 55 and the sensor window 52 of the sensor case 51 and is exposed from the sensor window 52. The upper end of the sensor base 55 is integrally provided with a receiving portion that protrudes toward the inner diameter side, and an elastic body S composed of a compression coil spring is supported here.

  The elastic body S is fitted into a drive cap 58 having an open bottom surface and a plurality of ribs 58a projecting at predetermined intervals in the circumferential direction. The rib 58a of the drive cap 58 is formed to have the same width and length as the sensor base groove 56 and the sensor case notch recess 53. The upper end portion of the drive cap 58 is a receiving portion that receives the upper end portion of the elastic body S.

  With the sensor assembly 50 assembled, the elastic body S is interposed between the receiving portion of the sensor base 55 and the receiving portion of the drive cap 58. The rib 58a of the drive cap 58 is engaged with the sensor base groove 56, and the tip of the rib 58a is engaged with the upper end of the sensor case notch recess 53. In this state, the rib 58a is spaced from the tip of the rib 58a and the deep end of the notch recess 53. There is.

  A protrusion 58b is provided on the upper surface of the upper end of the drive cap 58, and a hole 59 into which the rotation shaft of the drive motor is inserted and fitted is provided in the protrusion 58b. The drive cap 58 is inserted into the guide cylinder 62, and the protrusion 58b of the drive cap 58 is inserted into the hole 62a provided on the upper end surface of the guide cylinder 62, and is fixedly mounted in a state of protruding from the upper end surface. .

  A drive motor (rotation drive source) 60 is attached and fixed to the upper end surface of the guide cylinder 62, and the rotary shaft 60a is inserted and fitted into the hole 59 of the drive cap projection 58b through the hole 62a of the guide cylinder 62. Is done. The guide cylinder 62 is composed of cylinders 62b and 62c that are divided into two with a gap in the vertical direction, and these cylinders 62b and 62c are connected by a plurality of connecting pieces 62d.

  The drive cap 58 is inserted into the upper cylinder 62b of the guide cylinder 62 and fixed. A sensor case 51 that is integrated with the sensor base 55 and accommodates the human sensor Z is inserted into the lower cylindrical body 62c. On the other hand, the upper end of the sensor case 51 is provided with a latching protrusion 63 that protrudes toward the outer peripheral surface.

  In the assembled state, the latching protrusion 63 of the sensor case 51 is latched on the upper end edge of the lower cylinder 62c of the guide cylinder 62, and the sensor case 51 is prevented from falling off from the guide cylinder 62. The latching protrusion 63 is movable between the upper end edge of the lower cylindrical body 62c and the lower end edge of the upper cylindrical body 62b. That is, the sensor case 51 is movable in the vertical direction within the above range.

  In this way, the sensor assembly 50 is assembled. The sensor case 51 always protrudes from the guide cylinder 62 under the elastic force of the elastic body S. That is, in this embodiment, regardless of whether the air conditioning operation is stopped or during the air conditioning operation, as shown in FIG. 3, the human sensor Z protrudes from the front panel lower surface portion 3d.

  Since the drive motor 60 is not energized when the air-conditioning operation is stopped, the human sensor Z is in a fixed state while protruding from the front panel lower surface portion 3d. When the air conditioning operation start signal is input, the drive motor 60 is driven and the drive cap 58 fitted to the rotary shaft 60a repeats the rotation to the left and right by a predetermined angle.

Since the rib 58a of the drive cap 58 is engaged with the groove portion 56 of the sensor base 55 and the notch recess 53 of the sensor case 51, the sensor base 55 and the sensor case 51 rotate integrally when the drive cap 58 rotates. To do. The human sensor Z housed in the sensor base 55 and the sensor case 51 detects a resident and sends a detection signal to the control unit.
When the air conditioning operation stop signal is input, the drive motor 60 receives the drive stop control, and the position of the human sensor Z is fixed again.

  Regardless of whether the air conditioning operation is performed or stopped, the human sensor Z always protrudes from the lower surface portion 3d of the front panel. At this time, if static electricity of the resident affects the sensor substrate 33 on which the human sensor Z is mounted, the detection accuracy of the human sensor Z deteriorates.

  Also in this embodiment, the sensor case 51 that accommodates the human sensor Z is composed of a plurality of components, but the component division portion does not protrude from the sensor opening 22 during the air conditioning operation. Therefore, the static electricity possessed by the resident does not affect the sensor substrate 33 inside the sensor case 51, and resistance to static electricity is improved.

  Further, the front panel 3 is removed from the rear panel housing 2 at the time of service to perform necessary work, and the front panel 3 is fitted into the rear panel housing 2 after the service work is completed. When the front panel 3 is attached or detached, the front panel 3 may come into contact with the human sensor Z and the sensor case 51 in which the human sensor Z is housed, and an impact external force may be applied.

  Such an external force is transmitted to the elastic body S via the sensor case 51, and the elastic body S interposed between the fixed drive cap 58 and the sensor case 51 receiving the external force is compressed and deformed. At the same time, the cutout recess 53 of the sensor case 51 moves upward along the rib 58 a of the drive cap 58 together with the groove 56 of the sensor base 55.

  That is, if a shocking external force is applied, the human sensor Z housed in the sensor case 51 easily moves backward into the indoor unit body 1. The impact sensor is securely absorbed and the human sensor Z is not damaged at all. When the external force disappears, the human sensor Z is pushed down together with the sensor case 51 and the sensor base 55 by the elastic restoring force of the elastic body S, and returns to the original position.

  As mentioned above, although this embodiment was described, the above-mentioned embodiment is shown as an example and does not intend limiting the range of embodiment. The novel embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 13 ... Indoor heat exchanger, 14 ... Indoor fan, 1 ... Indoor unit main body, Z ... Human sensor, 42 ... Drive motor (drive source), 60 ... Drive motor (rotation drive source), 31, 51 ... Sensor case .

Claims (4)

Inside the indoor unit body that houses the heat exchanger and the blower,
It is attached to the lower front part of this indoor unit main body, and comprises a human sensor that detects the presence of heat generated by residents.
The human sensor protrudes from the wall surface of the indoor unit body, detects while repetitively rotating left and right, and retracts from the wall surface of the indoor unit body when not detected, and is stored inside the indoor unit body. Air conditioner indoor unit. A driving source that protrudes and moves from the wall surface of the indoor unit main body and repeats turning to the left and right is the same as a driving source that moves backward from the wall surface of the indoor unit main body and is housed inside the indoor unit main body. The indoor unit for an air conditioner according to claim 1, wherein the indoor unit is a drive source. Inside the indoor unit body that houses the heat exchanger and the blower,
It is provided in the lower front part of this indoor unit main body, and comprises a human sensor that detects the presence of heat generated by a resident,
The human sensor is connected to a rotation drive source that rotates to the left and right at the time of detection,
Furthermore, the human sensor is elastically pressed and urged so as to protrude from the wall surface of the indoor unit main body, and is supported by the elastic body so as to retreat into the indoor unit main body when an external force greater than the elastic force is applied. An air conditioner indoor unit. The human sensor is housed in a cylindrical sensor case having a divided structure,
4. The air according to claim 1, wherein the sensor case is separated from the wall surface of the indoor unit body in a state where the human sensor protrudes from the wall surface of the indoor unit body. The indoor unit of the harmony machine.

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