JP4251209B2 - Air conditioner with filter cleaning unit - Google Patents

Description

  The invention of this application relates to a configuration of an air conditioner with a filter cleaning unit in which a filter moves.

  Generally, a filter of an indoor unit for an air conditioner called a pre-filter is likely to be clogged with dust, dust, and the like, and needs frequent maintenance. However, the cleaning of the filter is quite troublesome, such as removing the filter from the indoor unit main body and taking out the dust in the mesh portion with a vacuum cleaner.

  Therefore, the operation time is integrated to determine the arrival of the filter cleaning time, and when the time when cleaning is necessary, a maintenance instruction (for example, LED lighting) is issued to prompt the user to clean the filter. It was broken.

  However, even if such a maintenance instruction is issued, there are many cases where the cleaning is not actually performed, and if the operation is continued with the filter clogged, the pressure loss is large and the power consumption increases due to an increase in the fan motor load. Invite. In addition, air suction noise increases.

  Therefore, recently, a filter cleaning unit has been incorporated into the indoor unit itself, and dust or the like attached to the filter is scraped automatically in response to a stoppage of operation or a remote control operation during an operation suspension period. There is provided an air conditioner with a filter cleaning unit in which dust discharged to the outside through a suction nozzle and an exhaust pipe or scraped off is stored in a dust box.

  In such a filter cleaning unit, for example, a scraping suction nozzle part that scrapes off dust from the filter and sucks up the dust that has been scraped moves to the left and right along the filter surface. Various types are provided, such as attaching a dust box with a brush for use, moving the dust box up and down along the filter, and scraping dust into the dust box with the brush (the former is a patent document) 1 and the latter are known as products).

  Further, unlike such a dust suction unit or dust box unit that moves along the filter surface, for example, the filter itself is a flat and flexible structure that can be bent and deformed. Is supported by the filter driving means and the filter supporting means so as to be reciprocally movable along the heat exchanger intake surface from the front surface of the air conditioner body, and a dust scraping brush is provided in the middle of the moving position of the filter. There has also been proposed a filter cleaning unit in which a dust box or the like can be removed and stored without moving the dust box or the like by installing the provided dust box (refer to Patent Document 2 as a known document).

  The inventor of this application supports the filter so that it can reciprocate along the entire intake surface from the front surface side to the upper surface side of the heat exchanger. A filter winding / rewinding mechanism is provided that winds almost the whole from the lower end side in a conveyor-like manner and rewinds it to a single sheet. A scraping brush for dust, dust, etc. is provided corresponding to the winding position of the filter winding / rewinding mechanism. Proposals have also been made to install the dust box provided so that the filter can be entrained and moved without moving the brush and dust box so that the dust and the like of the filter can be automatically removed and stored (non- (See Patent Document 3 as a known prior art document).

Japanese Patent Laying-Open No. 2006-112699 (Specification 1-6, FIG. 1-11) JP 2001-99479 A (Specifications page 1-4, FIG. 1-2) Japanese Patent Application No. 2006-235985 (Specification 1-6, FIG. 1-7)

  By the way, in the case of an air conditioner having an automatic cleaning function of the type that drives a filter as described above, when the filter is attached to the filter driving means (at the first attachment after being removed), the ease of attachment (filter A certain margin in the structure with the filter attached due to restrictions on the type of drive mechanism of the drive means and restrictions on the structure (accuracy of drive amount), etc. When it is necessary to have (a dimensional margin), a predetermined amount of deviation (a deviation from a planned arrival position on the designed structure) inevitably occurs at the filter mounting position of the user. Therefore, depending on how the filter is attached to the user's drive means, there may occur a case where the filter detection means (such as a limit switch) provided corresponding to the normal normal arrival position erroneously detects the filter attachment state. .

  As a result, in the conventional configuration, the filter detection control logic for detecting the presence or absence of the filter must be executed after the filter is attached, and there is a problem that it takes extra time to start actual cleaning.

  The invention of this application was made in order to solve such a problem, and between the end of a predetermined filter moving path provided corresponding to the intake surface of the heat exchanger and the mounting position. The filter cleaning unit solves the above-mentioned conventional problem by providing the filter detection means at a position moved in a direction to eliminate the displacement by the amount of displacement of the attachment position caused by the user's attachment condition described above for structural reasons. The object is to provide an air conditioner with air.

  In order to achieve the above object, the invention of this application includes the following problem solving means.

(1) Invention of Claim 1 This invention is the main body casing 3 which has the air inlet 1 and the air blower outlet 2, and the air passage from the said air inlet 1 in this main body casing 3 to the air outlet 2 The heat exchanger 4 disposed in the middle, the filter 5 provided corresponding to the air suction surface of the heat exchanger 4, and the heat exchange from the one end side to the terminal end side of the filter moving system path. A filter driving means 72 that moves along the air suction surface of the filter 4, a filter detection means LS provided at a predetermined position on the end side of the filter movement path , and a predetermined value on the end side of the filter 5 by the filter detection means LS. and filter control means for controlling the driving state of the filter drive means detects the movement of the position, off to perform cleaning of the filter surface of the filter 5 in the middle of the movement pathway of the filter 5 A filter cleaning unit 6, e Bei a fan 70 disposed in the air flow downstream side of the heat exchanger 4, the filter 5 is attached to the filter driving means at a predetermined position of the filter transfer system path drive In the air conditioner with a filter cleaning unit configured as described above, the filter detection means LS is moved between the end of the filter movement system path and the filter attachment position, depending on how the filter is attached to the filter drive means by the user. is characterized in that provided at one end side filter mounting position direction corresponding to the amount of deviation of the mounting position occur to those the shift amount corrected position.

As described above, the present invention has the filter driving means 72 for moving the filter along the air suction surface of the heat exchanger from the one end side mounting position of the filter moving system path to the terminal end side. 72, the filter is appropriately moved from one end side to the terminal end side of the filter moving path.

On the other hand, the filter 5 is attached to and driven by the filter driving means at a predetermined position on the filter moving system path. After the mounting, the filter moving system path is driven in the terminal direction, and the filter moving system is driven. The movement to the end side predetermined position is detected by the filter detection means LS provided at the predetermined position on the end side of the road, and the drive state of the filter driving means is appropriately controlled by the filter control means.

By the way, the filter detection means LS for detecting the arrival of the filter 5 at the predetermined position on the end side of the filter 5 as described above is suitable for the user because of the structural reasons such as the ease of installation by the user . by a dimension corresponding to the deviation amount between the end of the filter moving pathway occurring according to the difference to the one end side filter mounting position so as to eliminate the deviation amount, the one end side filter mounting position of the filter moving pathways It is installed at a position shifted in the direction by the amount of deviation .

If it does in this way, the amount of shift which arises by the difference in the attachment condition (difference in attachment position) of filter 5 by the user in the above-mentioned filter movement system path one end side filter attachment position will be canceled, and filter 5 once removed is attached again. Even at times, the termination-side filter detection means LS can reliably detect the arrival of the filter 5 .

  Therefore, the erroneous detection of the filter mounting state due to the user's filter mounting condition as in the prior art is eliminated, and the filter detection logic after the filter 5 is mounted can be simplified.

In addition, since the filter detection logic can be simplified in this manner, the time until the filter cleaning starts is shortened.

(2) Invention of Claim 2 This invention is configured to detect the movement state of the filter 5 when the filter drive means 72 moves by the filter detection means LS in the structure of the invention of Claim 1 above. It is characterized by being.

  According to such a configuration, the moving state of the filter 5 can be accurately detected by the filter detection means LS.

(3) Invention of Claim 3 This invention is the structure of the invention of Claim 1 or 2, wherein the filter drive means 72 moves the filter 5 up to the position where the filter detection means LS is installed. Whether or not the filter 5 can be moved is determined based on the presence or absence of a filter detection signal from the detection unit LS. On the other hand, after the filter is detected at the installation position of the filter detection unit LS, whether or not the pre-filter 5 can be moved is determined based on the driving amount of the filter driving unit 72. It is characterized by being configured to perform.

  According to such a configuration, as described above, there is no false detection of the filter attachment state due to the user's filter attachment condition, the detection logic after the filter attachment can be simplified, and the time to start cleaning can be reduced. Of course, since the filter detection to the detection position by the filter detection means LS and the filter detection at the time of subsequent movement are performed by two different means, the filter 5 including the filter detection means failure and the filter movement failure Abnormalities can be detected accurately and reliably.

(4) Invention of Claim 4 This invention attaches filter 5 in the filter installation state check at the time of the cleaning operation of filter 5 by filter cleaning unit 6 in the structure of invention of said Claim 1, 2 or 3 After that, when there is a filter detection signal by the filter detection means LS, only abnormality detection and origin correction control of the filter detection means LS are performed, while when there is no filter 5 detection detection signal by the filter detection means LS, In addition to the abnormality detection of the filter detection means LS and the origin correction control, it is also configured to detect the presence or absence of the filter.

  According to such a configuration, even when there is no signal for attaching the pre-filter 5 by the filter detection means LS, it is possible to detect the presence or absence of the filter in addition to the abnormality detection and origin correction control of the filter detection means LS. It becomes like this.

  As described above, according to the invention of this application, there is no erroneous detection of the filter attachment state due to the difference in the user's filter attachment condition as in the prior art, and the filter detection logic after the filter attachment is simplified. In addition, since the detection logic can be simplified, it is inevitably possible to shorten the time required to start cleaning the filter.

  1 to 15 show the configuration and action of an air conditioner A with a filter cleaning unit according to the best embodiment of the invention of this application, and the contents of filter cleaning control by the filter cleaning unit.

(1) Overall configuration and operation of the air conditioner A The air conditioner A includes a main body casing 3 having an air suction port 1 on the upper surface side and an air outlet 2 on the lower surface side front, and the main body. A cross fin type heat exchanger (evaporator or condenser) 4 disposed in the casing 3, and a mesh-structured prefilter 5 provided corresponding to the primary air suction surface of the heat exchanger 4; The filter support member 7 supports the prefilter 5 so as to be movable in the vertical direction and the horizontal direction from the vertical direction along the intake surface of the heat exchanger 4, and the prefilter 5 is wound around a conveyor belt. Then, a filter cleaning unit 6 for cleaning the filter surface (mesh surface) (scraping off dust etc. by brushing), and a crossflow type multi-blade fan disposed on the secondary side of the heat exchanger 4 70 and configured with To have.

  The main body casing 3 includes a housing portion 3a to which the heat exchanger 4, the pre-filter 5, the filter support member 7, the multi-blade fan 70 and the like are attached or supported, and an air suction covering the air suction port 2. The grill 3b and the front cover 3c that covers the front-side air suction space 1a of the heat exchanger 4 in a state that can be opened and closed.

  Further, the heat exchanger 4 is configured as a so-called lambda type heat exchanger, and has a front side heat exchange part 4a extending in a U-shape in the vertical direction, and a rear side from the upper end part of the front side heat exchange part 4a. It consists of a back side heat exchanger 4b that is bent obliquely downward and is located above the back side of the main body casing 3, and from the top side air inlet 1 of the main body casing 3 to the front side air suction space 1a. A sufficient amount of airflow passes efficiently through a large area air suction passage formed over the portion.

  On the other hand, reference numeral 8a is a first drain pan that receives the drain from the front heat exchange section 4a, 8b is a second drain pan that receives the drain from the rear heat exchange section 4b, and 9 is a blade of the multiblade fan 70. An air outlet passage 10 having a scroll structure that guides the air flow blown from the wheel portion 70a in the direction of the air blow-out port 2 is for preventing a reverse flow of the air flow blown from the impeller portion 70a of the multiblade fan 70. A tongue portion 11 is a wind direction adjusting mechanism composed of vertical blades, horizontal blades and the like disposed in the upstream portion of the air outlet 2.

  The front cover 3c is supported on both sides of the main body casing 3 via a predetermined movable guide mechanism. For example, as shown in FIG. 1, the front cover 3c approaches the front surface of the front-side heat exchange part 4a. It can be opened and closed between two states: a closed state in which the front surface portion of the side heat exchanger 4a is blinded and an open state in which the upper end side is pushed forward while moving downward from the closed state. In the open state, the front side of the front side heat exchanger 4a is configured to open.

  Then, in the above-described open state of the front cover 3c, the air flow sucked from the upper surface side air suction port 1 and the front side air suction space 1a of the main body casing 3 is converted into the heat exchanger 4 (heat exchanger 4a, 4b) is cooled or heated to pass through the conditioned air having a desired temperature and humidity, and flows through the impeller portion 70a of the multiblade fan 70 so as to be orthogonal to the rotary shaft 70b. The air is blown into the room from the air outlet 2 through the structure air outlet passage 9.

  The impeller portion 70a of the multiblade fan 70 is parallel to the rotary shaft 70b at the outer peripheral edge of a plurality of circular support plates arranged in parallel at a predetermined interval in the direction of the rotary shaft 70b. A large number of blades are arranged at a predetermined blade angle.

(2) Configuration of the pre-filter 5 as a dust collecting unit The pre-filter 5 is, for example, as shown in FIG. 3, a flat plate made of a synthetic resin having good flexibility that can be freely bent into an arc shape. A mesh member 52, 52... Having a predetermined mesh diameter is formed in a rectangular window between the flat frame members 51a, 51a,... Of a grid-like frame (a rectangular frame that is slightly longer in the vertical direction as a whole). .. The outer frame 51A, 51A on the left and right sides of the flat rectangular frame 51 is a grid-like frame member 51a, 51a,. A convex body (engagement pins) 53, 53... Having a predetermined length is provided on the back surface side, which is wider than the portion and protrudes in the orthogonal direction at regular intervals in the longitudinal direction. .

  In a normal state, the prefilter 5 is supported so as to be reciprocally movable along the entire intake surface from the front surface side to the upper surface side of the lambda heat exchanger 4 as shown in FIGS. On the other hand, when cleaning the filter surface, as shown in FIG. 6 from the state of FIG. 5, substantially the entire filter surface from the lower end 5 b side of the filter cleaning unit 6 will be described later. 72 is wound in a conveyor belt shape, and in the middle of the winding state, dust and the like are scraped off and brushed by a brush 16 to clean the entire filter surface as will be described later.

(3) Configuration of the filter support member 7 that supports the prefilter 5 so as to be movable in the vertical direction and the winding direction. That is, on the main body casing 3 side, for example, a filter support for prefilter support as shown in detail in FIG. A member 7 is provided. The filter support members 7 are located on both the left and right sides of the pre-filter 5 and are formed in a shape along the entire shape from the upper surface side back plate position to the front surface lower end position of the lambda heat exchanger 4. A pair of left and right frame plates 71 and 71 made of synthetic resin having a relatively rigid cross section and a pair of left and right frame plates 71 and 71 are provided on the front portion of the lower side portion of the side walls 71a and 71a extending in the vertical direction. Correspondingly provided filter holders 73 having a frame structure and upper and lower corner surface portions that are displaced from the front side portion extending in the vertical direction between the frame plates 71 and 71 to the upper side portion extending in the front-rear direction (horizontal direction). It consists of filter guide members 74a, 74a, 75a, 75a provided at both spatial surface positions. The filter guide members 74a, 74a, 75a, and 75a are respectively formed of two parallel support members 74, 74, 75, and 75 that are installed between the side wall portions 71a and 71a of the pair of left and right frame plates 71 and 71, respectively. The intermediate portions of the pre-filter 5 described above are supported in parallel with each other with the plate surfaces orthogonal to each other, and the end surfaces of the plate portions having rounded surfaces at the upper and lower ends thereof are used as guide surfaces extending in the filter moving direction. It supports without being bent and guides smoothly in the vertical and front-back directions.

  Each of these filter guide members 74a, 74a, 75a, 75a supports and guides corresponding to the intermediate frame members 51a, 51a extending in the vertical direction of the pre-filter 5 as apparent from FIG. 8, for example. ing.

  The filter holder 73 can be opened and closed corresponding to the front surface portion of the filter support member 7 corresponding to the front heat exchange portion 4a of the heat exchanger 4, and the upper end side frame plate 73b portion of the frame plate portion. Is pivotally supported via latch mechanisms 76 and 76 on the upper ends of the front surfaces of the frame plates 71 and 71 on both the left and right sides of the filter support member 7 so that the lower end side thereof can be rotated in the vertical direction.

  The left and right frame plates 73a and 73a are on the front side of the front and rear frame wall portions of the filter support member 7 that form guide grooves for the prefilter 5 on the left and right frame plates 71 and 71, respectively. Up and down direction with the toothed belt 72c of the filter winding / rewinding mechanisms 72, 72 that also serves as the frame wall portion (71a) and constitutes the central operating mechanism of the filter cleaning unit 6 described below. A first filter guide groove (vertical filter moving space) 12a extending in the vertical direction is formed.

  Further, the frame members 51a and 51a in the vertical direction of the pre-filter 5 are slidable between the left and right frame plates 73a and 73a corresponding to the filter guide members 75a and 75a on the filter support member 7 side. Presser members 73c and 73c to be pressed are provided.

(4) Configuration of the filter cleaning unit 6 for brushing the filter surface of the pre-filter 5 On the other hand, the filter cleaning unit 6 is located on both sides of the front surface portion of the heat exchanger 4 (the front surface portion of the front heat exchange portion 4a). The left and right sides of the pre-filter 5 are rewound from the original attached and stretched state as shown in FIG. 5, for example, into the annular state as shown in FIG. 6, and from the state shown in FIG. 6 to the original stretched state as shown in FIG. A pair of filter winding / rewinding mechanisms 72, 72 are provided corresponding to (approaching) the vicinity of the prefilter winding start position of the filter winding / rewinding mechanisms 72, 72, and the mesh member 52 of the prefilter 5 52... Rotor scraping brush 16 scraped off by brushing dust, dust or the like adhering to the portion, and scraping brush 16 Is made from the dust box 17 for accommodating the more scraped off the dust and the like.

  The dust scraping brush 16 and the dust box 17 are provided across the left and right ends of the heat exchanger 4.

  The pair of left and right filter winding / rewinding mechanisms 72, 72 are respectively provided with a lower large-diameter drive side first toothed pulley 72a and a predetermined distance above the first toothed pulley 72a. The driven side second toothed pulley 72b having a smaller diameter than the provided first toothed pulley 72a and the toothed portion suspended in mesh between the first and second toothed pulleys 72a, 72b. For example, as shown in FIG. 3, the toothed belt 72 c includes the above-described convex bodies (engagement pins) on the back surfaces of the outer frames 51 </ b> A and 51 </ b> A on both the left and right sides of the prefilter 5. .. Are provided at equal intervals corresponding to the longitudinal direction.

  The toothed belt 72c is accurately rotationally driven (stepping drive) in both forward and reverse directions by the driving of the first toothed pulley 72a by the pulse motor M1 (M2) of FIG. 8, for example, forward rotation (right rotation). ) When driven in the direction, the prefilter 5 is properly mounted to the final set position (upper end side) necessary for the expansion of the prefilter 5 through the first and second guide grooves 12a and 12b, When driven in the reverse (left-turning) direction, it is located on the lower end side of the first guide groove 12a and along the pulley surface of the first toothed pulley 72a, between the toothed belt 72c. The first guide plate 14a, the second guide plate 14b, and the first guide plate 14b, which are provided at a predetermined rotation angle width with the clearance necessary for passing the outer frames 51A, 51A of the prefilter 5 through The third guide plate 14c, which is long in the vertical direction on the back side along the toothed belt 72c in the pulley direction of the second toothed pulley 72b from the pulley surface, the second toothed pulley 72b on the upper end side The substantially entire prefilter 5 is stretched as shown in FIG. 5 by using a guide action such as a fourth guide plate 15a (rotating support shaft 15c) that holds the prefilter curved surface portion of the same portion that is caught by its own weight. From the state, it is wound on the outer peripheral surface of the toothed belt 72c as in the cleaning state of FIG.

  Then, when the prefilter 5 is rolled from the state of FIG. 5 to the state of FIG. 6, the first toothed pulley 72a is located below (the first guide plate 14a and the second behind the predetermined rotation angle than the first guide plate 14a). The dust scraping brush 16 provided in contact with the guide plate 14b) sufficiently removes dust, dust, etc. adhering to the mesh members 52, 52. Scrape off (state of FIG. 6). The dust scraping brush 16 is located in the dust box 17 and provided in the coaxial direction, and the scraped dust, dust, and the like are reliably stored in the dust box 17. The dust box 17 is detachably attached to the housing portion 3a of the main body casing 3, and is periodically removed (or every time a predetermined operation time elapses) to throw away dust and dust inside. In addition, the brush portion can be cleaned.

  Accordingly, when the lower end side of the filter retainer 73 is disengaged from the filter support member 7 and the lower end side is rotated forward by a predetermined angle as shown in FIG. 4, for example, the lower end 5b of the prefilter 5 The pressing state with respect to the side toothed belt 72c is released, and the convex bodies 53, 53... On the back surface side of the pre-filter 5 are removed from the engagement holes 13, 13. Then, the convex bodies 53, 53... Are omitted), and the prefilter 5 can be detached from the filter support member 7 (see the direction of arrow a).

  In this case, since the filter presser 73 is pivotally supported by the filter support member 7 via the latch mechanisms 76 and 76, it is possible to maintain the open state at a desired angle as shown in FIG. The pre-filter 5 can be easily removed and the insertion and mounting work can be easily reversed.

  For example, as shown in the arrow b in FIG. 4, the prefilter 5 is mounted on the upper end 5a side of the prefilter 5 from the lower first guide groove 12a to the second guide on the upper end side. Inserted in the direction of the groove 12b (At this time, an arcuate filter guide 15b is further formed at the upper end of the fourth guide plate 15a, and the prefilter 5 at the time of insertion is guided upward. After that, the convex bodies 53, 53... On the lower surface 5b side rear surface (outer frame 51A, 51A rear surface) from the middle side are, for example, shown in phantom lines in FIG. 1, inserted into the respective engagement holes 13, 13... In the front side portion of the toothed belt 72c (72c, 72c) spanned between the second toothed pulleys 72a, 72b (a pair of left and right) The filter is pressed in the engaged state. 73 to close to its original state.

  After that, when the front cover 3c is engaged with the front movable guide mechanism portion of the main casing 3 and a desired filter operation switch is turned on, the lower end 5b side of the prefilter 5 is once reversed by a predetermined dimension and the first After being wound between the first toothed pulley 72a side first and second guide plates 14a, 14b, the forward rotation is then carried out, and the upper end 5a side is fed upward by an appropriate dimension amount, and finally the proper setting is made. Stop at position. The arrival at this set position is detected by the filter detection means LS comprising a limit switch provided at a predetermined position on the end side of the pre-filter moving system path, as in the case where “cleaning operation” described later is stopped.

  As a result, the prefilter 5 is mounted in the original stretched state as shown in FIG.

  The filter winding / rewinding mechanisms 72 and 72 including the first and second toothed pulleys 72a and 72b and the toothed belt 72c described above are, for example, a pair of left and right parts divided into left and right as shown in FIG. The left and right pre-filters 5 and 5 corresponding to the filter support members 7 and 7 and the pair of left and right filter support members 7 and 7 are provided in pairs. The pair of left and right first toothed pulleys 72a, 72a, 72a, 72a of each pair of left and right filter winding / rewinding mechanisms 72, 72, 72, 72 is a first toothed pulley 72a. , 72a, 72a, 72a and backup elastic rolls 77, 77 having substantially the same diameter as each other are provided so as to be coaxial with each other.

  In this embodiment, for example, as shown in FIGS. 2 and 8, the lower end of the upper end side predetermined width portion extending in the front-rear direction between the frame plates 71, 71 of the filter support member 7 is changed from the upper end side to the front side. A seal plate 20 for sealing the top surface of the V-shaped cross section (side face) V-shaped to match the shape of the V-shaped air passage part (valley part) 4c of the bent part of the lambda heat exchanger 4 near the corner part. And the filter support member 7 is mounted on the main casing 3 simultaneously with the seal plate 20 (the seal portion 20a, the support frame portion 20b, and the mounting integrated portion 20c) of the lambda heat exchanger 4. The V-shaped air passage part (valley part) 4c of the bent part is configured to be sealed.

(5) Configuration of Control Circuit Unit In the housing 3a of the main body casing 3, for example, as shown in FIG. 2, an electric box 18 is installed on the side of the heat exchanger 4 described above. Various types of control units as shown in FIG. 9 are provided in the electrical box 18 with a microcomputer control unit as a center.

  The control unit is roughly divided into an indoor unit control unit 80 and an outdoor unit control unit 83 which are connected to each other. The indoor unit control unit 80 further includes an air conditioning mechanism control unit 81 and a cleaning mechanism control unit 82. However, the outdoor unit control unit 83 is provided with a humidification / ventilation control unit 84, respectively.

  The air conditioning mechanism control unit 81 includes a front panel drive unit 81a, a horizontal flap drive unit 82a, a vertical flap drive unit 81c, and a fan drive unit 81d. The cleaning mechanism control unit 82 includes a rotary brush drive unit 82a and a filter drive unit 82b. , A filter detector 82c and a dust box detector 82d.

  The indoor unit control unit 80 includes an air conditioning operation control unit 80a, a cleaning mechanism determination unit 80b, a cleaning mechanism control unit 80c, a cleaning mechanism initialization processing unit 80d, a filter cleaning time determination unit 80e, and the like. The mechanism control unit 81, the cleaning mechanism control unit 82, and the outdoor unit control unit 83 are controlled.

  The indoor unit control unit 80 is also provided with a main body side operation switch 85, a display unit 86, a light receiving unit 87b of the remote controller 87a, and the like.

  The filter detection unit 82c of the cleaning mechanism control unit 82 is configured by filter detection means LS including a limit switch as described below, for example, and the mounting state and filter winding when the prefilter 5 is mounted by the user described above. Appropriate detection and determination of the suitability of the filter mounting state at the time of filter rewinding by the rewinding mechanisms 72 and 72 is made.

(6) Cleansing operation control In the air conditioner A of the present embodiment configured as described above, for example, the pre-filter 5 is stretched as shown in FIG. 10 (a) (normal position: FIG. 5 described above). When the filter winding / rewinding mechanisms 72 and 72 and the dust scraping brush 16 are driven to rotate, the prefilter 5 is further moved into the filter winding / rewinding mechanism as shown in FIG. The cleaning of the pre-filter 5 is started by being wound on the toothed belts 72c and 72c of the 72 and 72. In the following description of “cleaning operation control”, the movement of the prefilter 5 in the winding direction is defined as the forward movement, and the movement in the reverse rewinding direction is defined as the backward movement.

Finally, as shown in FIG. 10C, the entire prefilter 5 (the whole from the lower end 5b side to the upper end 5a side) is engulfed (the maximum movement position of the prefilter 5 in the forward direction). The cleaning of the pre-filter 5 is completed in P ₄ ), and the subsequent movement in the extending direction shown in FIG.

Accordingly, as can be seen from the operations of FIGS. 10A to 10C, the prefilter 5 is moved from the state of FIG. 10C to the state of FIG. position) pre-filter transfer system that has returned to P ₀ is found path 12a, filter detecting section LS is provided consisting of a limit switch as described above the end (upper end) side by a predetermined position on the 12b, the pre-filter by the filter detecting section LS When the upper end 5a of 5 is detected, the filter winding / rewinding mechanisms 72, 72 and the dust scraping brush 16 are stopped.

(7) Problems when the prefilter 5 is attached to the toothed belts 72c and 72c of the filter winding / rewinding mechanisms 72 and 72 By the way, the prefilter 5 using the filter winding / rewinding mechanisms 72 and 72 as described above is used. 5 is driven, when the filter is attached to the toothed belts 72c and 72c of the filter winding / rewinding mechanisms 72 and 72 (when the filter is first attached after being removed, see FIG. 3), Ease of attachment work (for example, as shown in FIG. 3, the shape of the engagement holes 13, 13... 13, 13,... .. And the toothed belt 72c when the engagement between the toothed bodies 53, 53... And the toothed belts 72c, 72c is facilitated. , 72c engagement 13, 13..., And a certain degree of margin structurally with the pre-filter 5 attached due to the difference in driving accuracy as the driving means, etc. When there is a need to provide a certain amount of displacement, there is inevitably a certain amount of displacement in the direction of the filter movement path at the user's filter mounting position (the amount of displacement from the planned contact position on the designed structure).

Therefore, depending on the user's mounting condition (in FIG. 3, it is engaged properly from the lowermost belt side engagement holes 13, 13 or from the upper engagement holes 13, 13 as shown). The above-described filter detection means (limit switch) LS provided corresponding to the normal normal arrival position (position per structure) P ₀ shown in FIG. A case will be detected.

  As a result, as described above, in the configuration of the filter cleaning unit of the conventional filter driving system, the filter detection control logic that always detects the presence or absence of the filter is executed after the filter is mounted, and the filter that drives the filter cleaning unit is then executed. Therefore, there is a problem that it takes extra time until the actual cleaning starts.

Therefore, in this embodiment, in order to solve such a problem, as shown in FIGS. 11A and 11B and FIG. 12, for example, the first and second guide grooves 12a and 12b are used. 2 between the terminal end of the filter movement path indicated by (2) and the filter mounting position shown in FIG. 2, the structural contact position corresponding to the amount of displacement of the filter mounting position caused by the above-described user mounting condition (normal arrival position: origin) Position) By providing the filter detection means LS at a position moved in the direction of displacement elimination by the amount of deviation from P ₀ , the amount of deviation caused by the user's attachment of the pre-filter 5 is offset, and when the pre-filter 5 is attached The prefilter 5 can be reliably detected.

  Therefore, according to this configuration, there is no erroneous detection of the prefilter attachment state depending on the user's prefilter attachment state as in the prior art, and the filter detection logic after the prefilter attachment can be simplified.

  And since the filter detection logic can be simplified as such, the time until the start of cleaning is shortened.

The positional deviation when the filter is mounted is corrected for the origin by the origin correction control as shown in the time chart of FIG. 13, for example, and set to the correct normal position (origin position) P ₀ . Further, the origin correction operation simultaneously detects a failure of the filter detection means LS.

That is, the same control, the prefilter 5, the normal position shown in FIG. 10 (a) (origin position), the P _0, not forward indicating the position P ₁ immediately after the actual mounting in (b) of FIG. 10 direction ( installation position (detection position) beyond the P ₂ is moved by a distance b which prefilter 5 is detected as completely non-attached stop by (the non-attached stop position of the prefilter 5 toward the maximum position P ₄ directions) P _3).

  At this time, if the filter detection means LS is not in a non-attachment detection operation (no detection signal), it is determined that the filter detection means LS is out of order or a failure in the movement of the pre-filter 5 is detected, so that the filter is abnormal.

Further, when the pre-filter 5 is reversed and moved to the home position P ₀ in the backward direction, and during that time the filter detection means LS changes from the “non-attached” detection state to the “attached” state detection, the above-described filter The number of pulses corresponding to the offset distance a is operated and stopped. As described above, after the reverse movement of the pre-filter 5, if the return path is moved by the non-mounting confirmation movement amount b, if it is not in the “mounted” state, it is determined that the filter is abnormal due to the movement failure of the pre-filter 5 or the failure of the filter detection means LS. To do.

Note that FT (time) in FIG. 13 indicates a two-phase excitation time for reliably stopping or reversing the stepping motor M ₁ (M ₂ ).

FIG. 14 shows a case where the above-described prefilter 5 moves from the normal position (origin position) P ₀ in FIG. 10A to the maximum movement position P _{4 in} FIG. FIG. 15 is a time chart for returning to the above-mentioned prefilter 5 from the maximum movement position P _{4 in} FIG. 10B to the origin return position P _{0 in} FIG. 10A. Each of them detects an abnormality of the prefilter 5 (if the prefilter 5 is not attached even if it is driven by the distance b in FIG. 14, the filter detection means LS is not pre-filtered even if it is driven by the distance a + c + d in FIG. Detection of abnormality of the dust box 17 (the detection means of the detection unit 82d of the dust box 17 provided separately during the movement of FIGS. 14 and 15 detects that the filter is not mounted). The time) is possible.

  As described above, the configuration of the present embodiment is configured such that the filter detection means LS also detects the movement state when the prefilter 5 is moved by the filter winding / rewinding mechanisms 72 and 72.

  According to such a configuration, the movement state of the pre-filter 5 itself can be accurately detected by the filter detection means LS.

Furthermore, in this configuration, in that case, when the pre-filter 5 is moved by the filter winding / rewinding mechanisms 72, 72, the presence of the filter detection signal of the filter detection means LS is determined up to the installation position of the filter detection means LS. While determining whether or not the pre-filter 5 can be moved, after the filter detection at the installation position of the filter detection means LS, the drive amount of the filter winding / rewinding mechanisms 72 and 72 (the driving pulse of the stepping motor M ₁ (M ₂ )) Number).

  According to such a configuration, as described above, there is no false detection of filter attachment due to the user's filter attachment condition, the detection logic after filter attachment can be simplified, and of course the time until the start of cleaning can be shortened. Since the filter detection up to the detection position by the filter detection means LS and the filter detection at the time of the subsequent movement are performed by two different means, the abnormality of the filter 5 including the failure of the filter detection means and the filter movement trouble is detected. It becomes possible to detect accurately and reliably.

  Further, as described above, in the present embodiment, at the time of filter mounting check at the start of the filter cleaning operation by the filter cleaning unit 6, after the prefilter 5 is attached, there is a filter detection signal by the filter detection means LS. When the filter detection means LS performs abnormality detection and origin correction control only, and when there is no filter attachment detection signal from the filter detection means LS, the filter detection means LS is detected in addition to the abnormality detection and origin correction control. It can also be configured to detect the presence or absence.

  According to such a configuration, even when there is no signal for attaching the pre-filter 5 by the filter detection means LS, it is possible to detect the presence or absence of the filter in addition to the abnormality detection and origin correction control of the filter detection means LS. It becomes like this.

It is sectional drawing which shows the whole structure of the air conditioner with a filter cleaning unit which concerns on best embodiment of invention of this application. It is a perspective view of the state which removed exterior parts, such as the whole surface cover of the same air conditioner, an upper surface side air suction grille. It is an expanded perspective view of the principal part which shows the relationship between the pre filter of the same air conditioner, and a pre filter winding rewinding mechanism. Pre-filter and pre-filter support member of the same air conditioner, filter holder, seal plate, pre-filter winding and unwinding mechanism, scraping brush for dust etc., enlarged cross section of pre-filter insertion or removal state showing the mutual relationship and structure of dust box FIG. The pre-filter and pre-filter support member of the same air conditioner, filter holder, seal plate, pre-filter winding and unwinding mechanism, scraping brush for dust, etc. is there. It is an expanded sectional view of the prefilter winding state which shows the prefilter of the same air conditioner, the prefilter support member, the filter presser, the prefilter winding rewinding mechanism, the dust scraping brush, and the dust box. It is the expanded sectional view of the principal part seen from the side which shows the relationship between the pre filter support member, heat exchanger, and seal plate in the air conditioner. It is an expanded sectional view of the principal part which shows the mutual relationship of the pre filter support member of the same air conditioner, a pre filter, and a pre filter holder. It is a block diagram which shows the structure of the control circuit of the air conditioner. It is explanatory drawing which shows the relationship between the pre filter drive position of the same air conditioner, and "cleansing operation". It is explanatory drawing which shows the relationship between the normal position and maximum position of the pre filter of the air conditioner. It is explanatory drawing which shows the structure of the pre filter detection system of the air conditioner. It is a time chart corresponding to the origin correction control operation of the air conditioner. It is a time chart which shows the content of the outward operation | movement in the "cleansing operation" control of the air conditioner. It is a time chart which shows the content of the return path operation | movement in the "cleansing operation" control of the air conditioner.

Explanation of symbols

  A is an air conditioner, 1 is an air inlet, 2 is an air outlet, 3 is a main body casing, 3a is a housing, 3b is an air inlet grille, 3c is a front cover, 4 is a heat exchanger, 4a is a front side heat exchanger 4b is a back side heat exchange part, 4c is a V-shaped air passage part (valley part) of a heat exchanger bent part, 5 is a pre-filter, 6 is a filter cleaning unit, 7 is a filter support member, 16 is dust, etc. A scraping brush, 17 is a dust box, 71 is a frame plate on both the left and right sides of the filter support member 7, 71a is a side wall portion of the frame plate 71, 71b is a front wall portion of the frame plate 71, 72a is a first toothed pulley, 72b Is a second toothed pulley, 72c is a toothed belt, 80 is an indoor unit controller, 82 is a cleaning mechanism controller, 82c is a filter detector, and LS is a filter detector.

Claims (4)

A main body casing 3 having an air inlet 1 and an air outlet 2, a heat exchanger 4 disposed in the air passage from the air inlet 1 to the air outlet 2 in the main body casing 3, A filter 5 provided corresponding to the air suction surface of the heat exchanger 4 and a filter for moving the filter 5 along the air suction surface of the heat exchanger 4 from one end side to the terminal end side of the filter moving path Driving means 72, filter detecting means LS provided at a predetermined position on the end side of the filter movement path , and detection of movement of the filter 5 to a predetermined position on the end side by the filter detecting means LS. the filter control means for controlling the driving state, the filter cleaning unit 6 for cleaning the filter surface of the filter 5 in the middle of the movement pathway of the filter 5, the heat exchanger 4 of Bei example a fan 70 disposed in the air flow downstream side, air with to become a filter cleaning unit adapted to drive the filter 5 is attached to the filter driving means at a predetermined position of the filter transfer system path In the harmony machine, the filter detection means LS is set between the end of the filter movement path and the filter attachment position in accordance with the amount of displacement of the attachment position caused by the user's attachment of the filter to the filter drive means. the air conditioner with a filter cleaning unit, characterized in that at one end the filter mounting position direction provided to the person the shift amount corrected position.   2. The air conditioner with a filter cleaning unit according to claim 1, wherein the filter driving unit 72 is configured to detect a moving state when the filter 5 is moved by the filter detecting unit LS. 3.   When the filter 5 is moved by the filter driving means 72, whether or not the filter 5 can be moved is determined by the presence or absence of the filter detection signal from the filter detection means LS up to the position where the filter detection means LS is installed. 3. The air with a filter cleaning unit according to claim 1 or 2, wherein after the filter is detected at the LS installation position, whether the filter 5 is movable or not is determined based on the driving amount of the filter driving means 72. Harmony machine.   In the check of the filter mounting state at the start of the cleaning operation of the filter 5 by the filter cleaning unit 6, when there is a filter detection signal from the filter detection means LS after the filter 5 is attached, the abnormality detection of the filter detection means LS is detected. While only the origin correction control is performed, when there is no attachment detection signal of the filter 5 by the filter detection means LS, in addition to the abnormality detection of the filter detection means LS and the origin correction control, the presence or absence of the filter is also detected. The air conditioner with a filter cleaning unit according to claim 1, 2, or 3.

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