JP2011052908A - Indoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor unit for an air conditioner simplifying a position detection means of air filters on a premise that an air filter automatic cleaner is provided and contributing to improvement of assembling work efficiency and cost reduction. <P>SOLUTION: In an indoor unit for an air conditioner, indoor air is sucked and made to flow in air filters F, and after dust included in the indoor air is collected by the air filters F, the indoor air exchanges heat with a heat exchanger and is blown out to the indoor side again as heat exchange air. A plurality of air filters F are juxtaposed leaving a gap, and each of the air filters F is supported movably along a predetermined trajectory. A position detection device K is provided in the gap between the air filters F. The position detection device K includes a detector 31 corresponding to each air filter F and one switch part 32, and detects positions of the plurality of air filters F simultaneously. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an indoor unit of an air conditioner including an air filter cleaning device that automatically removes dust adhering to an air filter, and more particularly to an improvement in a position detection structure of an air filter in the air filter cleaning device.

  The indoor unit of the air conditioner includes an air filter facing the suction port, and a heat exchanger is disposed on the downstream side of the air filter. The air filter filters dust contained in room air sucked from the suction port, and only clean air is led to the heat exchanger. Since dust remains on the air filter, dust attached to the air filter accumulates over a long period of use.

  If left as it is, the amount of air introduced into the heat exchanger is reduced by the adhering dust, and the heat exchange efficiency is lowered. [Patent Document 1] discloses an indoor unit of an air conditioner that automatically removes dust adhering to the air filter while the air filter is disposed in the indoor unit body without removing the air filter from the indoor unit body. Yes.

JP 2008-145081 A

  A plurality of air filters are juxtaposed in the indoor unit described in [Patent Document 1], and are reciprocated on a predetermined track during automatic cleaning of the air filters. Further, a plurality of position detection means are provided to detect the positions of the plurality of air filters.

  Specifically, two filters are juxtaposed, and one rotary shaft that supports two rotating members is provided in the gap between these filters, and two switches are arranged. Each filter is brought into contact with and separated from the corresponding rotating member according to the position, and the corresponding switch is turned on and off to determine whether or not the air filter is in a predetermined position.

  However, the above-described position detection means includes two rotating members and two switches for the two air filters. Rotating members for the individual air filters are necessary, but since the same switch is provided, there is a problem that the number of parts increases and the assemblability and cost are affected.

  The present invention has been made based on the above circumstances, and the purpose thereof is to simplify the air filter position detecting means and to improve the assembly workability on the premise that an air filter automatic cleaning device is provided. It is intended to provide an air conditioner indoor unit that contributes to the reduction of cost and cost.

In order to satisfy the above-mentioned object, the present invention sucks indoor air and distributes it through an air filter, captures dust contained in the indoor air with the air filter, exchanges heat with the heat exchanger, and again enters the room as heat exchange air. It is an indoor unit of an air conditioner designed to blow out.
In this indoor unit of an air conditioner, a plurality of air filters are juxtaposed with each other with a gap, and each air filter is supported movably along a predetermined track. Position detecting means is provided in the gap between these air filters.
The position detection means includes a detector corresponding to each air filter and one switch unit, and simultaneously detects the positions of a plurality of air filters.

  According to the present invention, it is possible to simplify the position detection means of the air filter and to contribute to the cost reduction.

The longitudinal section of the indoor unit of the air conditioner which removed the front panel based on one embodiment in the present invention. The perspective view of the indoor unit of the air conditioner which removed the front panel based on the embodiment. The perspective view of a part of air filter and position detection apparatus based on the embodiment. The perspective view which decomposed | disassembled the position detection apparatus based on the embodiment. The state diagram of the position detection apparatus which detected that the two air filters based on the embodiment were in a detection range. The state diagram of the position detection apparatus which detected that the two air filters based on the embodiment were outside a detection range. The state diagram of the position detection apparatus which detected that the one air filter based on the embodiment is in a detection range, and the other one air filter is out of a detection range. The perspective view of the position detection apparatus using the optical detector based on the modification of the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an air conditioner indoor unit with a part (front panel) omitted, and FIG. 2 is a perspective view thereof.
The indoor unit main body 1 includes a front panel (not shown) constituting a front surface, an upper surface, and left and right side housings, and a rear main body 3 constituting a lower surface and a rear housing. The indoor unit body 1 has a large width dimension with respect to the vertical dimension, and is formed in a horizontally long shape as a whole.

A suction port is opened in the upper surface of the front panel. An open / close panel is fitted in the front portion of the front panel so that the open / close panel can be freely opened and closed, and work can be performed by opening the open / close panel during maintenance.
The rear body 3 is provided with an air filter support frame 6 </ b> A that supports the air filter F, a heat exchanger 7, an indoor blower 8, and a blowout port 9. By driving the indoor blower 8, a blower passage 10 that connects the suction port and the blowout port 9 is formed in the indoor unit body 1.

The outlet 9 is provided with two outlet louvers 11a and 11b. These blow-out louvers 11a and 11b are upper and lower louvers that open and close the blow-out opening 9 according to a rotating posture and set the blow-out direction of heat exchange air according to operating conditions.
The heat exchanger 7 is assembled so that the front heat exchanger portion 7A and the rear heat exchanger portion 7B are formed in a substantially inverted V shape in a side view. The front heat exchanger part 7A is formed in a curved shape so as to face the entire front part of the front panel and a part of the suction port of the upper part. The rear heat exchanger section 7B is straight and obliquely inclined and faces a part of the suction port.

The heat exchanger 7 communicates with a compressor, an outdoor heat exchanger, and the like housed in an outdoor unit (not shown) through a refrigerant pipe, and these constitute a refrigeration cycle. The indoor blower 8 is disposed between the front and rear heat exchanger portions 7A and 7B constituting the heat exchanger 7.
The indoor blower 8 includes a fan motor disposed in a space on one side end of the indoor unit body 1 and a cross-flow fan connected to the rotation shaft of the fan motor. The axial direction length of the cross flow fan is set to be the same as the width direction length of the heat exchanger 7 and is arranged so as to face each other correctly.

  The lower end portion of the front heat exchanger portion 7A is placed on the front drain pan 12a, and the lower end portion of the rear heat exchanger portion 8B is placed on the rear drain pan 12b. The front and rear drain pans 12a and 12b are formed integrally with the rear main body 3, respectively, and drain water dripped from the heat exchanger portions 7A and 7B can be received and drained to the outside through a drain hose (not shown). .

  The outer surfaces of the side walls of the front and rear drain pans 12a and 12b are provided close to the indoor blower 8, and these constitute a nose for the crossflow fan of the indoor blower 8. A partition wall member 13 connects the side wall portions of the front and rear drain pans 12 a and 12 b that are noses and the side portions of the outlet 9.

By driving the indoor blower 8, the space surrounded by the partition wall member 13 becomes the blowout side in the blower passage 10 that communicates the nose and the blowout opening 9. On the other hand, the space from the suction port to the heat exchanger 7 is the suction side in the air passage 10.
The air filter support frame 6A is attached between the front panel 2 and the heat exchanger 7, and a cleaning device support frame 6B that supports the air filter cleaning device S is integrated along a lower end portion of the air filter support frame 6A. Is provided.

  Further, the front surface portion of the air filter support frame 6A is opposed to the front surface portion of the front panel and is bent with a gap from the front surface of the front heat exchanger portion 7A. The upper surface portion is opposed to the upper surface portion (suction port) of the front panel, and is opposed to the upper surface of the rear heat exchanger portion 7B with a gap. The air filter F supported by the air filter support frame 6A also has the same posture shape.

  The air filter cleaning device S is interposed between the air filter support frame 6 </ b> A and the upper side blowing louver 11 a provided at the blowing port 9. In a state where the front panel is attached, the cleaning device support frame 6B and the air filter cleaning device S are both shielded by the front panel and cannot be seen from the outside.

  The air filter support frame 6A is configured in a state in which the front frame 14a and the rear frame 14b are overlapped with a gap therebetween. Each of the front frame body 14a and the rear frame body 14b includes a vertical beam at the left and right sides and a central portion, a horizontal beam connecting the rear and front ends of the vertical beam, and a space between the vertical beam and the horizontal beam. And an auxiliary bar incorporated in a rectangular shape.

  Furthermore, a partition guide bar 14c is provided between the vertical beam of the front frame 14a and the vertical beam of the rear frame 14b. By this partition guide bar 14c, a space space is secured between the front frame body 14a and the partition guide bar 14c and between the partition guide bar 14c and the rear frame body 14b.

The lower end of the front frame 14a is connected to the front end of the cleaning device support frame 6B, and the lower end of the rear frame 14b is connected to the rear end of the cleaning device support frame 6B. The lower end portions of the front frame body 14a and the rear frame body 14b are formed with a wider interval than the upper end portions.
The partition guide bar 14c has an upper end portion that is only a plate thickness, and a lower end portion that is formed in a triangular bag shape in cross section. Thus, the distance between the front frame body 14a and the rear frame body 14b with respect to the partition guide bar 14c is set to be the same from the upper end to the lower end of the partition guide bar 14c.

  The left and right width dimensions of the air filter F coincide with the dimensions between the left and right vertical bars constituting the air filter support frame 6A and the central vertical beam a, and the dimension between the upper and lower ends of the air filter F Is formed so as to coincide with the dimension between the front end side crosspiece and the rear end side crosspiece constituting the air filter support frame 6A.

  A plurality of (two) air filters F are supported on the air filter support frame 6 </ b> A in a state where they are arranged side by side with a gap. In other words, each air filter F is in a space between the front frame 14a and the partition guide bar 14c during the air conditioning operation and when the operation is stopped, which is a normal state other than during automatic cleaning of the air filter F. Contained and supported.

  In this state, the upper end of each air filter F is located along the upper ends of the front frame 14a and the partition guide bar 14c. And it is detected whether each air filter F exists in a regular position by the position detection apparatus (position detection means) arrange | positioned in the clearance gap between air filters F. FIG.

FIG. 3 is a perspective view of each air filter F upper end portion accommodated and supported in a predetermined space, and a position detection device (position detection means) K interposed between the air filters F. FIG. 4 is an exploded perspective view of the position detection device K. FIG.
As described above, the two air filters F are accommodated in a predetermined space with the left and right gaps arranged side by side, while one position detection device K is provided in the gap between the air filters F. It is done.

  Here, when the position detection device K detects that both of the air filters F or one of the air filters F is not in a predetermined position at a predetermined timing, for example, a blinking display or an alarm is given to the user. Make some warnings. When it is detected at the same timing that both air filters F are in a predetermined position, no notification is given.

  Specifically, in the position detection device K, an upper substrate 30A and a lower substrate 30B are detachably combined to form a device substrate 30, and a detection is performed between the upper substrate 30A and the lower substrate 30B. A child 31 and a switch part 32 are interposed. A part of the detector 31 protrudes from the apparatus base 30, and the remaining part is accommodated in the apparatus base 30 together with the switch unit 32.

  In other words, both the upper base 30A and the lower base 30B are formed in a substantially rectangular shape having a longer longitudinal dimension than the width dimension, and have a predetermined plate thickness. Concave portions 34 are provided on both side portions of the lower base body 30B, and holding portions 35 projecting on both side portions of the upper base body 30A are detachably engaged with the concave portions 34 so as to have a strip shape with a predetermined plate thickness. It becomes the device base 30.

  The detector 31 includes a torsion spring 36 that is one elastic body, and a groove portion b that is engaged with both ends of the torsion spring 36, and a first detection lever 37 </ b> A that receives elastic force by the torsion spring 36 and a second detection lever 37 </ b> A. Detection lever 37B, and a slider 38 with which the rear ends of the first and second detection levers 37A and 37B come into contact with and separate from each other.

  A shaft portion 40 protrudes from the lower surface of one side portion of the upper base body 30A, and the shaft portion 40 is a hole provided in the first detection lever 37A and the second detection lever 37B with the torsion spring 36 interposed therebetween. d is inserted into the winding portion of the torsion spring 36 and is engaged with a latching hole e provided in one side portion of the lower base 30B.

  In this state, the first detection lever 37 </ b> A and the second detection lever 37 </ b> B have one end protruding from the apparatus base 30 and are rotatable about the shaft portion 40 of the upper side base 30 </ b> A. However, the torsion spring 36 receives the elastic force in the direction in which the distal ends of the detection levers 37A and 37B are separated from each other, and has, for example, substantially the same shape as when the tip of the scissors is opened.

  A stopper groove portion 41 is provided in the vicinity of the shaft portion 40 of the upper base body 30A along the width direction of the base body 30A, and a protrusion 42 provided on the upper surface portion of the first detection lever 37A engages. In addition, a stopper groove 44 is provided in a portion perpendicular to the width direction in the vicinity of the latching hole e of the lower base 30B, and a protrusion 45 provided on the lower surface of the second detection lever 37B is engaged. .

  Accordingly, the first detection lever 37A and the second detection lever 37B are rotatable within the width dimension range of the stopper groove portions 41 and 44 provided in the upper base 30A and the lower base 30B.

  Although the width dimension of each stopper groove part 41 and 44 is very short, the distance from the hole part d and e in which the axial part 40 of upper side base | substrate 30A inserts to the front-end | tip part of 1st, 2nd detection lever 37A, 37B Therefore, the rotation angle of each detection lever 37 </ b> A, 37 </ b> B is ensured to be large to some extent.

  The slider 38 is a projecting piece that slidably engages with a slider groove 47 provided between the holding portions 35 of the upper base 30A and a slider groove 48 provided between the concave portions 34 of the lower base 30B. A portion 49 is provided. Each slider groove 48 is provided along the longitudinal direction of the upper and lower bases 30A and 30B, and the slider 38 is movable in this direction.

A projecting portion 50 that protrudes in a substantially triangular shape is provided on the end surface of the slider 38 that faces the first and second detection levers 37A and 37B, and depending on the open / closed state of the tip of each detection lever 37A and 37B. The rear end portions of the detection levers 37A and 37B are assembled so as to be able to contact and separate.
That is, when the front ends of the detection levers 37A and 37B are open due to the elastic force of the torsion spring 36, the rear ends of the detection levers 37A and 37B come into contact with the protrusion 50 of the slider 38, and the slider 38 Energize the move.

Further, when the front ends of the detection levers 37A and 37B are closed against the elastic force of the torsion spring 36, the rear ends of the detection levers 37A and 37B are separated from the protrusion 50 of the slider 38, and thus A movement biasing force is not applied to the slider 38.
The switch part 32 is a micro switch in which an actuator c that is a detection button protrudes on one side surface. It is fixedly attached to the lower base 30B via a fixture so as to be adjacent to the slider 38, and is covered with the upper base 30A.

  When the slider 38 is at a position farthest from the switch portion 32, the actuator c of the switch portion 32 is not pressed and is in an off state. When the slider 38 is at the position closest to the switch portion 32, the actuator c of the switch portion 32 is pressed by the slider 38, and an on signal is sent to the control portion.

  As shown in FIG. 1 and FIG. 2 again, a tooth portion is provided over the entire length of the back surface of the vertical rail portion of each air filter F to form a timing belt. This tooth portion meshes with the air filter feed gear 15 constituting the air filter cleaning device S. The air filter feed gear 15 is provided at a predetermined interval along the axial direction of the dust push-up brush 16 constituting the air filter cleaning device S.

  The cleaning device support frame 6B is provided with a bearing portion that supports the rotating shaft 16a of the dust lifting brush 16, and a dust box 20 constituting the air filter cleaning device S is detachably attached thereto.

  Furthermore, four drive motors M are attached to the side surface of the cleaning device support frame 6B. The upper two drive motors M are connected to the rotating shaft 16a of the dust lifting brush 16 via a gear assembly, and the lower two drive motors M constitute an air filter cleaning device S via the gear assembly. It is connected to a rotating shaft 18a of the blade 18.

  Since the air filter feed gear 15 and the rotary shaft 16a of the dust lifting brush 16 are coaxial, the drive motor M connected to the rotary shaft 16a also serves as a drive source for the air filter feed gear 15. The dust lifting brush 16 and each air filter feed gear 15 are driven to rotate simultaneously, so that the two air filters F can be moved simultaneously.

Next, the operation of the indoor unit of the air conditioner configured as described above will be described.
When an air conditioning operation start signal such as cooling operation or heating operation enters the control unit, a drive signal is sent to the compressor disposed in the outdoor unit to start the refrigeration cycle operation, and at the same time, a drive signal is sent to the indoor blower 8. It is done.

  The room air is sucked into the indoor unit main body 1 from the suction port and guided along the air blowing path 10 on the suction side. First, the air filter F is circulated, and dust contained in the room air is captured. The filtered and cleaned room air is guided to the front heat exchanger section 7A and the rear heat exchanger section 7B that constitute the heat exchanger 7.

  The heat exchanger 7 and the room air exchange heat, and if the cooling operation mode is selected, the room air becomes cool air, and if the heating operation mode is selected, the room air changes to warm air. The heat exchange air is guided along the air blowing path 10 on the blow-out side, guided from the blow-out port 9 to the blow-out louvers 11a and 11b, and blown into the room.

  When the cool air is blown out into the room, the room temperature is lowered and the air is cooled. When the warm air is blown into the room, the room temperature rises and performs a heating action. In any case, when the indoor air sucked into the indoor unit body 1 circulates through the air filter F, dust contained in the indoor air is captured, and constantly cleaned heat exchange air is blown into the room. Clean the room.

  Over a long period of use, the dust trapped in the air filter F accumulates thickly, resulting in clogging. If left as it is, the heat exchange efficiency is lowered, and the cooling capacity and heating capacity are affected. Therefore, the user presses an “air filter cleaning button” provided on the remote control (remote control panel) before or after the air-conditioning operation.

  When this signal enters the control unit, a drive signal is sent to the drive motor M provided in the air filter cleaning device S. The air filter feed gear 15 and the air filter push-up brush 16 are integrally rotated in the counterclockwise direction, and the dust removing blade 18 is rotated in the clockwise direction.

  The two air filters F that have filtered the room air side by side move in a U-turn shape from the front frame 14a and the partition guide bar 14c in the same state, with the lower end leading. . Then, the two air filters F simultaneously move upward between the partition guide bar 14c and the rear frame 14b.

  From the relationship between the thickness of the bristles of the air filter push-up brush 16 and the filter hole diameter of the air filter F, the bristles of the air filter push-up brush 16 are surely inserted into the filter holes of the air filter F. The dust clogged in the filter hole of the air filter F is pushed up from the filter hole by the bristles of the air filter push-up brush 16.

  Since the air filter push-up brush 16 is disposed on the secondary side of the air filter F on the heat exchange air outlet side, dust is pushed out by the brush hair to the primary side on the heat exchange air introduction side. A dust removing blade 18 is disposed on the primary side, and the dust is pushed up toward the dust removing blade 18.

The dust removing blade 18 has a relatively simple structure, but reliably removes dust floating on the primary side from the air filter F. Moreover, since the dust removing blade 18 is a rotating body, the dust pushed up by the air filter push-up brush 16 is continuously removed.
When the air filter F moves and fits in the space between the partition guide bar 14c and the rear frame 14b over the entire length, the control unit sends a stop signal to the drive motor M. After the movement of the air filter F is temporarily stopped, the reverse drive signal is sent to the drive motor M again at the timing.

  The air filter feed gear 15, the air filter push-up brush 16, and the dust removing blade 18 are rotationally driven in the opposite direction. The air filter F moves again, passes between the air filter lifting brush 16 and the dust removing blade 18, and returns to the space between the original front frame 14a and the partition guide bar 14c.

  Also at this time, the dust remaining in the filter hole of the air filter F is pushed up to the primary side by the air filter push-up brush 16 and is completely removed by the dust removing blade 18. The dust removed from the air filter F by the dust removing blade 18 is stored in the dust container 28 in the dust box 20.

  By pressing the “air filter cleaning button” a plurality of times and cleaning the air filter F, the dust in the dust container 28 becomes almost full. Therefore, the dust box 20 is removed from the air filter cleaning device S, and the internal dust is discarded.

Next, the operation of the position detection device K that detects the position of the air filter F will be described.
FIG. 5 shows a state in which the upper base 30A is removed from the position detection device K during the air conditioning operation and the operation stop described above with reference to FIG.

  When the left and right air filters F are in a predetermined position, the tip ends of the first detection lever 37A and the second detection lever 37B are in contact with the side ends of the air filter F. As described above, since one torsion spring 36 applies elastic force to the two detection levers 37A and 37B, the tip portions 37A and 37B of the detection levers are normally open.

  However, here, the air filters F are juxtaposed on the left and right sides of the position detection device K, and the tip ends of the first detection lever 37A and the second detection lever 37B are in contact with each other. The first and second detection levers 37A and 37B are rotationally displaced against the elastic force of the torsion spring 36, and the tip portions are closed.

The rear end portions of the detection levers 37 </ b> A and 37 </ b> B that face the slider 38 are open from each other and are separated from the protrusion 50 of the slider 38. There is no pressing urging force of the detection levers 37A and 37B against the slider 38, and therefore the actuator c of the switch portion 32 is not pressed and is kept off.
Since the control unit does not receive the detection signal from the switch unit 32, the control unit confirms that the two air filters F are present at the proper positions, and does not take any action.

  When the “air filter cleaning button” on the remote controller is pressed, the control unit operates the air filter cleaning device S as described above, and the air filter is automatically cleaned. At this time, the air filter F is simultaneously moved downward from the position in FIG. 5. After traveling to a predetermined position and temporarily stopping, the vehicle travels upward in the figure and returns to the position in FIG.

  However, there may be a case where some trouble occurs during the automatic cleaning of the air filter F, the air filter F stops midway, and does not return to the position shown in FIG. At this time, as shown in FIG. 6, the air filter F and the first detection lever 37A and the second detection lever 37B of the position detection device K are in an open state.

  That is, the elastic force of the torsion spring 36 is applied to the first detection lever 37A and the second detection lever 37B as they are, and the tip portions thereof open to each other. Conversely, the rear end portions of the detection levers 37A and 37B are in a closed state, and come into contact with and press against the protrusion c of the slider 38.

  Therefore, the slider 38 moves and presses the actuator c of the switch unit 32, and an ON signal is sent from the switch unit 32 to the control unit. In the control unit, for example, a warning such as a blinking display of a red lamp (LED) is displayed to notify the user. The user who has received the warning needs to open the open / close panel, check the positional deviation of the air filter F, and return to the original position shown in FIG.

  The position detection device K detects the air filter F again, and the warning display is canceled. If the air-conditioning operation is restarted while the position of the air filter F is shifted, dust contained in the room air flows through the heat exchanger 7 as it is and is blown into the room together with the heat exchange air. Since the air filter F is returned, there is no problem even if the air-conditioning operation is resumed.

  Originally, the two air filters F are configured to travel at the same time, but depending on the type of trouble, only one air filter F travels normally, and the other air filters F are halfway due to trouble. It may stop at

  For example, as shown in FIG. 7, the air filter F on the left side of the drawing normally travels and returns to the original position, but trouble occurs in the air filter F on the right side of the drawing and stops halfway. In the position detection device K, the front end portion of the first detection lever 37A contacts the air filter F that has returned to the normal position, the rear end portion is separated from the slider 38, and the switch portion 32 is turned off.

  However, the second detection lever 37B cannot contact the air filter F that does not return to the normal position due to a problem. Accordingly, the rear end portion of the second detection lever 37 </ b> B comes into contact with and presses the protrusion 50 of the slider 38. The actuator c of the switch unit 32 is pressed via the slider 38 and sends an ON signal to the control unit.

  Eventually, the switch unit 32 has the same state as described above with reference to FIG. 6, and the control unit displays a warning. The user who received this confirms the position of the air filter F and returns it to the original position shown in FIG. Therefore, the position detection device K detects both air filters F, and the warning display is eliminated.

As described above, the position detection device K reliably detects not only the case where two air filters F traveling and moving at the same time are in trouble but also when only one of the air filters F is in trouble. Is possible.
In addition, the position detectors 31 corresponding to the plurality of air filters F and one position detection device K including one switch unit 32 simultaneously detect the positions of the plurality of air filters F, so that the position detection structure is simple. This contributes to improved assembly workability and cost reduction.

  In the above embodiment, the detector 31 includes the first and second detection levers 37A and 37B, the torsion spring 36, and the slider 38, and the switch unit 32 is brought into contact / non-contact with the detection levers 37A and 37B. Equipped with a mechanical switch. This type of switch operates reliably with almost no influence even if dust adheres, and can maintain high reliability.

Note that the position detection device Ka is not limited to this, and may be a position detection device Ka as shown in FIG. FIG. 8 is a perspective view showing a schematic configuration of a position detection device Ka as a modification.
The switch part 32A used here is an optical switch provided with a light emitting part g and a light receiving part h with a gap therebetween. The detector 31a includes a first detection lever 37A, a second detection lever 37B, and a torsion spring (not shown) that is one elastic body interposed between the detection levers 37A and 37B. The slider described above is not necessary.

  When the front ends of the first detection lever 37A and the second detection lever 37B come into contact with the air filter F, the rear ends of the detection levers 37A and 37B are the light emitting part g and the light receiving part h that constitute the optical switch 32A. And blocks the light emitted from the light emitting part g. Therefore, an off signal is sent from the optical switch 32A to the control unit.

  When the detection levers 37A and 37B are not in contact with the air filter F, the rear end portions of the detection levers 37A and 37B are located away from the optical switch 32A. Receive light. Therefore, an ON signal is sent from the optical switch 32A to the control unit. In either case, the subsequent treatment is as described above.

  In the case of this type of optical switch 32A, if dust adheres to both the light emitting part g and the light receiving part h, the reliability of the operation may be impaired. . However, the slider 38 constituting the detector 31 of the mechanical switch 32 is not necessary, and the structure can be simplified.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

  F ... Air filter, 7 ... Heat exchanger, 31 ... Detector, 32 ... Switch part (mechanical switch), K ... Position detector, 32a ... Optical switch, 37A ... First detection lever, 37B ... Second Detection lever 36, torsion spring (elastic body).

Claims (4)

Air conditioner indoors that sucks indoor air and distributes it through the air filter, traps the dust contained in the indoor air with the air filter, exchanges heat with the heat exchanger, and blows it out again as heat exchange air. In the machine
A plurality of air filters which are juxtaposed to each other with a gap therebetween, each supported in a movable manner along a predetermined trajectory;
Position detectors provided in the gaps between these air filters, each having a detector corresponding to each air filter, one switch unit, and simultaneously detecting the positions of a plurality of air filters;
An air conditioner indoor unit comprising:   The indoor unit of an air conditioner according to claim 1, wherein the switch part of the position detection means is a mechanical switch that operates in accordance with contact / non-contact of the detector.   The indoor unit of an air conditioner according to claim 1, wherein the switch unit of the position detecting means is an optical switch that optically detects the detector.   The detector of the position detection means includes a number of detection levers equal to the number of the air filters, and one elastic body is elastically engaged with the detection levers to apply an elastic force. The indoor unit of the air conditioner in any one of Claim 2 and Claim 3.

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