CN101517331B - Air conditioner with filter cleaning unit - Google Patents

Abstract

The air conditioner with a filter cleaning unit of the present invention comprises: a main body casing (3); a heat exchanger (4) arranged in the middle of the air passage in the main body casing (3); and the heat exchanger The filter (5) correspondingly configured on the primary side air suction surface of (4); the filter driving part, which is used to install the filter (5), and make the filter (5) along the heat exchanger (4) The air suction surface moves; the filter detection unit (LS) is provided at a predetermined position on the terminal side of the filter moving path (12a, 12b); the filter cleaning unit (6) is located at the end of the filter moving path The filter surface of the filter (5) is cleaned on the way; and the fan (70) is arranged on the secondary side of the heat exchanger (4). The filter detection unit (LS) is provided at a position where the offset is corrected from the end point (P ₀ ) of the filter moving path toward the inside of the filter moving path corresponding to the offset of the filter installation position. , said offset can be generated according to the installation of the filter (5) relative to the filter drive.

Description

Air conditioner with filter cleaning unit

technical field

The invention of the present application relates to the structure of an air conditioner with a filter cleaning unit that moves a filter. the

Background technique

The filter of the air conditioner indoor unit, which is generally called a coarse filter, tends to accumulate dust and dust, and it needs to be cleaned frequently. However, the cleaning work of removing the filter from the main body of the indoor unit and taking it out, and vacuuming the dust and the like from the mesh portion is very cumbersome. the

Therefore, it is determined whether it is time to clean the filter by accumulating operating time, etc., and when it is time to clean the filter, a maintenance instruction (for example, lighting of an LED, etc.) for urging the user to clean the filter is issued. the

However, in many cases, even if such a maintenance instruction is issued, cleaning is not performed much in practice, and if the operation continues with the filter clogged, the pressure loss will increase, and the load on the fan motor will increase, resulting in increased power consumption. In addition, the suction noise of the air becomes louder. the

Therefore, recently, an air conditioner equipped with a filter cleaning unit is provided in which the filter cleaning unit is incorporated in the indoor unit itself, corresponding to the stop of the operation, or corresponding to the operation of the remote control during the stop of the operation. , to automatically scrape the dust attached to the filter, and discharge it to the outside through the suction nozzle and exhaust pipe, or store the scraped dust in the dust box. the

In such a filter cleaning unit, for example, various types of filter cleaning units are provided in which a scraping suction nozzle portion for scraping the dust of the above-mentioned filter and sucking the scraped dust is along the filter surface. A filter cleaning unit that moves left and right; and a dust box having a brush for scraping dust etc. Filter cleaning unit etc. in the dust box (the former is known by patent document 1 (Japanese Patent Laying-Open No. 2006-112699 (instructions 1-6 pages, Fig. 1-11)), the latter is known as a product). the

And, unlike the filter cleaning unit in which the scraping suction nozzle unit or the dust box unit moves along the filter surface such as dust, for example, a filter cleaning unit has been proposed in which the filter itself is formed flat and A flexible structure that can be bent and deformed. On the other hand, the filter is supported by the filter drive member and the filter support member so as to be able to reciprocate along the suction surface of the heat exchanger from the front of the air conditioner main body to the upper surface. , and corresponding to the middle of the moving position of the above-mentioned filter, a dust box with a dust scraping brush is provided, so that the dust of the filter can be removed and accommodated without moving the dust box or the like (refer to the patent document as a known document 2 (Japanese Unexamined Patent Application Publication No. 2001-99479 (1-4 pages of the specification, Fig. 1-2))). the

The inventors of the present application have also proposed a filter cleaning unit prior to this application: in the case of enabling the filter to move in the above-mentioned manner, the filter is further supported so as to be able to move along the heat exchanger from the front side up to The suction surface on the upper side reciprocates as a whole, and a filter roll-in and return mechanism that can roll up the entire filter from the lower end side into a conveyor belt shape and return it to a sheet state is provided, and the filter A dust box with a brush for scraping off dust, dust, etc. is installed corresponding to the roll-in position of the filter roll-in and rewind mechanism, so that the filter can be automatically removed by rolling in and moving the filter without moving the brush and the dust box. And accommodate the dust etc. of the filter (refer to Patent Document 3 (Japanese Patent Application No. 2006-25942 (Specification 1-6 pages, Fig. 1-7)) as the prior art data which is not known). the

However, in the case of the above-mentioned air conditioner with the automatic cleaning function of the drive filter type, when the filter is installed with respect to the filter driving member (at the time of initial assembly after being temporarily disassembled), due to the ease of installation (filtering) The degree of roughness of the joint between the filter and the drive member) or the type of drive mechanism of the drive member, structural constraints (accuracy of the drive amount), etc., in the state where the filter is installed, it is necessary to have a certain degree of structural The margin (surplus in size). In this case, a predetermined amount of deviation (the amount of deviation from the intended arrival position on the design structure) inevitably occurs at the position where the user installs the filter. Therefore, in the case where the filter detection member (limit switch, etc.) is provided corresponding to the usual normal reach position, the filter detection member (limit switch, etc.) etc.) erroneously detects the installation state of the filter. the

As a result, in the conventional configuration, there was a problem that the filter detection control logic for detecting the presence or absence of the filter had to be executed after the filter was installed, and it took unnecessary time until the actual cleaning started. the

Contents of the invention

The invention of the present application has been made to solve the above-mentioned problems, and its object is to provide an air conditioner with a filter cleaning unit that has a predetermined filter movement that is provided corresponding to the suction surface of the above-mentioned heat exchanger. In the air conditioner with the filter cleaning unit of the path, due to structural reasons, the installation position of the user may be offset by the above-mentioned installation situation. By setting the filter detection part at the installation position The offset corresponds to the corrected position, thereby solving the above existing problems. the

In order to achieve the above object, the invention of the present application has the following means for solving the problems. the

The air conditioner with filter cleaning unit of the present invention is characterized in that,

The air conditioner with filter cleaning unit has:

The main body shell has an air suction port and an air blowing port;

A heat exchanger arranged in the middle of the air passage from the air inlet to the air outlet in the main body casing;

a filter configured correspondingly to the primary side air suction surface of the heat exchanger;

a filter drive unit for mounting the filter and moving the filter through a filter moving path along the air suction surface of the heat exchanger;

A filter detection unit, which is provided at a predetermined position on the terminal side of the above-mentioned filter moving path;

a filter cleaning unit that cleans the filter surface of the above-mentioned filter in the middle of the moving path of the above-mentioned filter; and

a fan, which is arranged on the secondary side of the above-mentioned heat exchanger,

The filter detection unit is provided at a position where the offset is corrected from the terminal end of the filter moving path toward the inside of the filter moving path corresponding to the offset of the filter attachment position. The amount of displacement can be generated depending on how the filter is attached to the filter drive unit. the

In the air conditioner with the filter cleaning unit of the present invention, the filter detecting part for detecting whether the filter is assembled in a preset proper position is provided at the The position from the terminal end of the filter moving path to the inside of the filter moving path after correcting the offset amount that can occur depending on how the filter is attached to the filter drive unit. That is, for structural reasons such as the realization of ease of installation, the filter detection unit is provided at a position shifted in the direction of eliminating the displacement by a dimension corresponding to the displacement caused by the user's mounting situation. Thereby, it is possible to offset the amount of displacement caused by the user attaching the filter, and to reliably detect the filter when attaching the filter. the

Therefore, it is possible to eliminate conventional erroneous detection of the filter attachment state caused by how the user attaches the filter, and to simplify the filter detection logic after the filter is attached. the

And, by simplifying the filter detection logic in this way, the time until cleaning starts is shortened. the

An air conditioner with a filter cleaning unit according to one embodiment is characterized in that the air conditioner mechanism detects a moving state of the filter when the filter is moved by the filter drive unit, also by the filter detection unit. the

According to such a structure, the moving state of a filter can be detected accurately by a filter detection part. the

An air conditioner with a filter cleaning unit according to one embodiment is characterized in that the air conditioner mechanism uses the filter up to a position where the filter detection unit is provided when the filter is moved by the filter drive unit. Whether the filter can be moved is determined by the presence or absence of the filter detection signal of the detection part; move. the

According to this configuration, as described above, it is possible to eliminate false detection of the filter attachment state caused by the user attaching the filter, simplify the filter detection logic after the filter is attached, and shorten the time until cleaning starts. And, since the filter detection up to the detection position of the filter detection part and the filter detection during the subsequent movement are performed by two different members, it is possible to accurately and reliably detect the failure of the filter detection part and the filter. Abnormality of the filter including movement barriers. the

An air conditioner with a filter cleaning unit according to one embodiment is characterized in that the air conditioning mechanism is configured to: in the inspection of the filter assembly state at the start of the filter cleaning operation by the filter cleaning unit, when the filter is installed, After the filter, when there is a filter detection signal based on the above-mentioned filter detection part, only the abnormality detection and origin correction control of the above-mentioned filter detection part are performed; on the other hand, when there is no installation detection of the filter based on the filter detection part signal, in addition to the abnormality detection and origin correction control of the above-mentioned filter detection section, it is also detected whether a filter is installed or not. the

According to such a configuration, even when there is no installation signal of the prefilter by the filter detection unit, it is possible to detect whether or not a filter is attached in addition to the above-mentioned abnormality detection and origin correction control by the filter detection unit. the

As described above, according to the invention of the present application, it is possible to eliminate the erroneous detection of the filter mounting state due to the difference in the state of the filter mounting by the conventional user, and simplify the filter detection logic after the filter is mounted. In addition, since the detection logic can be simplified, the time until the cleaning of the filter is started can certainly be shortened. the

Description of drawings

Fig. 1 is a cross-sectional view showing the overall structure of an air conditioner with a filter cleaning unit according to a preferred embodiment of the invention of the present application. the

Fig. 2 is a perspective view of the air conditioner in a state where all the masks, the upper air suction grill, and other outer packaging parts are removed. the

Fig. 3 is an enlarged perspective view of main parts showing the relationship between the prefilter and the prefilter roll-in and rewind mechanism of the air conditioner. the

Fig. 4 is a rough filter showing the relationship and structure of the coarse filter of the air conditioner, the support member of the coarse filter, the filter pressing member, the sealing plate, the mechanism for rewinding the coarse filter, the scraping brush for dust, and the dust collecting box Enlarged cross-sectional view of inserted or removed state. the

Fig. 5 is a rough filter showing the relation and structure of the coarse filter of the air conditioner, the support member of the coarse filter, the filter pressing member, the sealing plate, the rolling-in and rewinding mechanism of the coarse filter, the scraping brush for dust and the like, and the dust collecting box A zoomed-in section view of the unfolded state. the

Fig. 6 is a coarse filter showing the relationship and structure of the coarse filter of the air conditioner, the support member of the coarse filter, the filter pressing member, the rolling-in and rewinding mechanism of the coarse filter, the scraping brush for dust and the like, and the dust collection box

An enlarged cross-sectional view of the rolled-in state. the

Fig. 7 is an enlarged cross-sectional view of main parts viewed from the side, showing the relationship between a prefilter support member, a heat exchanger, and a seal plate in the air conditioner. the

Fig. 8 is an enlarged cross-sectional view of a main part showing a relationship between a strainer support member of the air conditioner, a strainer, and a strainer holder. the

Fig. 9 is a block diagram showing the configuration of a control circuit of the air conditioner. the

Fig. 10 is an explanatory diagram showing the relationship between the driving position of the pre-filter and the "cleaning operation" of the air conditioner. the

Fig. 11 is an explanatory diagram showing the relationship between the normal position and the maximum position of the prefilter of the air conditioner. the

Fig. 12 is an explanatory diagram showing the configuration of the prefilter detection system of the air conditioner. the

Fig. 13 is a timing chart corresponding to the origin point correction control operation of the air conditioner. the

Fig. 14 is a time chart showing the contents of the forward path operation in the "cleaning operation" control of the air conditioner. the

Fig. 15 is a time chart showing the contents of the return path operation in the "cleaning operation" control of the air conditioner. the

Detailed ways

1 to 15 show the structure and operation of an air conditioner A with a filter cleaning unit according to a preferred embodiment of the invention of the present application, and the content of filter cleaning control by the filter cleaning unit. the

(1) The overall structure and function of the air conditioner A

This air conditioner A is composed of: a main body casing 3 having an air inlet 1 on the upper side and an air blowing outlet 2 on the lower front; An exchanger (evaporator or condenser) 4; a filter 5 (that is, a strainer of mesh structure) arranged correspondingly to the primary side air suction surface of the heat exchanger 4; the strainer 5 is supported to be able to a filter support member 7 that moves in the up-down direction and from the up-down direction toward the front-back horizontal direction along the suction surface of the heat exchanger 4; the filter cleaning unit 6 that drives the above-mentioned prefilter 5 to be wound into a conveyor belt shape , its filter surface (mesh surface) is cleaned (with brushing to scrape off dust, etc.); the

This air conditioner A is composed of: a main body casing 3 having an air inlet 1 on the upper side and an air blowing outlet 2 on the lower front; An exchanger (evaporator or condenser) 4; a filter 5 (that is, a strainer of mesh structure) arranged correspondingly to the primary side air suction surface of the heat exchanger 4; the strainer 5 is supported to be able to a filter support member 7 that moves in the up-down direction and from the up-down direction toward the front-back horizontal direction along the suction surface of the heat exchanger 4; the filter cleaning unit 6 that drives the above-mentioned prefilter 5 to be wound into a conveyor belt shape , its filter surface (mesh surface) is cleaned (with brushing to scrape off dust, etc.); the

The above-mentioned main body casing 3 is made up of the following parts: a frame body part 3a, which installs or supports the above-mentioned heat exchanger 4, prefilter 5, filter support member 7, multi-blade fan 70, etc.; grill 3b; and a front cover 3c which covers the front air intake space 1a of the heat exchanger 4 in an openable and closable state, and the like. the

And, the above-mentioned heat exchanger 4 is constituted as a so-called λ-type heat exchanger, which is composed of a front side heat exchange part 4a extending in the shape of "く" in the up-down direction, and a front side heat exchange part 4a extending from the upper end part of the front side heat exchange part 4a toward the front side heat exchange part 4a. The back side heat exchange part 4b bent obliquely below the rear side and located above the back side of the said main body case 3 is comprised. Accordingly, a sufficient amount of air can be efficiently passed through the wide-area air intake passage formed from the upper side air intake port 1 portion of the main body case 3 to the front side air intake space 1a portion. the

On the other hand, reference numeral 8a is a first drain pan (drain pan) that catches the drainage from the above-mentioned front side heat exchange part 4a, and reference numeral 8b is a second drain pan that catches the drainage from the above-mentioned back heat exchange part 4b. 9 is the air blowing passage of the vortex structure that guides the air flow blown out from the impeller portion 70a of the above-mentioned multi-blade fan 70 to the direction of the air outlet 2, and the reference numeral 10 is used to prevent the air from being blown out from the impeller portion 70a of the above-mentioned multi-blade fan 70. The tongue portion of the counterflow of the air flow, reference numeral 11 is a wind direction adjusting mechanism composed of vertical blades and horizontal blades arranged in the upstream part of the above-mentioned air blowing port 2 . the

The front cover 3c is supported on both sides of the main body case 3 via a predetermined movable guide mechanism. For example, as shown in Figure 1, the front cover 3c can be opened and closed between the following two states: a closed state close to the front of the above-mentioned front side heat exchange portion 4a and covering the front portion of the front side heat exchange portion 4a; And the open state of the forward leaning state which pushes the upper end side forward while moving downward from this closed state. This front cover 3c is comprised so that the front surface of the said front side heat exchange part 4a may open in the said open state. the

Furthermore, when the above-mentioned front cover 3c is in the above-mentioned open state, the air flow sucked in from the top side air suction port 1 of the above-mentioned main body casing 3 and the front side air suction space 1a passes through the above-mentioned heat exchanger 4 (heat exchange part 4a, 4b) The conditioned air that is cooled or heated to become a desired temperature and humidity passes through the impeller portion 70a of the multi-blade fan 70 in a manner perpendicular to the rotation shaft 70b of the above-mentioned multi-blade fan 70, and then passes through the above-mentioned multi-blade fan 70. The air blowing passage 9 of scroll structure is blown out toward indoor from above-mentioned air blowing outlet 2. the

The impeller portion 70a of the multi-blade fan 70 is configured to be parallel to the rotation shaft 70b at a predetermined distance on the outer periphery of a plurality of circular support plates arranged in parallel at predetermined intervals in the direction of the rotation shaft 70b. The wing corners are equipped with multiple blades. the

(2) The structure of the prefilter 5 as a collection unit for dust and the like

The above-mentioned prefilter 5 becomes the following parts, for example, as shown in FIG. On the square window portion between the flat frame members 51a, 51a... of the flat grid-shaped frame body (a rectangular frame body that is slightly long in the vertical direction as a whole) 51. The outer frames 51A, 51A on the left and right sides of the flat rectangular frame body 51 are formed to be wider than the lattice-shaped frame members 51a, 51a... between them. Protrusions (engagement pins) 53 , 53 . the

Furthermore, in a normal state, as shown in FIGS. 4 to 5 , the prefilter 5 is supported reciprocally movably along the entire suction surface from the front side to the upper side of the lambda heat exchanger 4 . On the other hand, when cleaning the filter surface, as shown from the state of FIG. 5 to the state of FIG. 6 , the substantially whole of the filter surface is rolled into the filter cleaning unit 6 described later in the form of a conveyor belt from the lower end 5b side. The filter is rolled into the rewind mechanism 72,72. In the middle of this entangled state, the entire filter surface is cleaned by brushing with the scraping brush 16 for dust or the like as will be described later. the

(3) A structure in which the strainer 5 is supported as a filter support member 7 capable of moving in the vertical direction and the rolling direction

That is, a filter support member 7 for supporting a prefilter shown in detail in FIG. 8 , for example, is provided on the side of the main body case 3 . The filter support member 7 is composed of the following components: a pair of left and right frame plates 71, 71 made of a hook-shaped synthetic resin with high rigidity, which are located on the left and right sides of the above-mentioned prefilter 5, and are formed along the above-mentioned The shape of the overall shape of the λ-type heat exchanger 4 from the position of the upper side back plate to the position of the lower end of the front side; the filter press member 73 of the frame structure, and the edge between the left and right pair of frame plates 71, 71 The front portions of the lower side portions of the side walls 71a, 71a extending in the up and down direction are provided correspondingly; The upper and lower space plane positions of the corner surface parts displaced from the front side part of the front side part to the upper side part extending in the front-rear direction (horizontal direction). The above-mentioned filter guide members 74a, 74a, 75a, 75a are between the two parallel support members 74, 74, 75, 75 respectively erected between the side wall portions 71a, 71a of the pair of left and right frame plates 71, 71. The space is supported parallel to each other so that the plate surfaces are perpendicular to each other. Thus, the filter guide members 74a, 74a, 75a, and 75a use the end faces of the plate portions having arcuate surfaces at the upper and lower ends as guide faces extending along the filter moving direction, so as not to make the middle of the above-mentioned prefilter 5 The above-mentioned prefilter 5 is supported in such a manner that the parts are flexed so as to be smoothly guided in the up-down direction and in the front-rear direction. the

For example, as can be seen from FIG. 8 , the respective filter guide members 74 a , 74 a , 75 a , 75 a are supported and guided exactly corresponding to the middle frame members 51 a , 51 a extending in the vertical direction of the prefilter 5 . the

The filter holder 73 can be opened and closed corresponding to the front portion of the filter support member 7 corresponding to the front side heat exchange portion 4 a of the heat exchanger 4 . The filter holding member 73 pivotally supports the upper end side frame plate 73b portion of the frame plate portion on the front portion upper ends of the frame plates 71, 71 on the left and right sides of the filter support member 7 via clutch mechanisms 76, 76, Thereby, the lower end side of the filter holder 73 can be rotated in the up-down direction. the

Furthermore, the frame plates 73a, 73a on the left and right sides are also used as the front side frame wall portions in the front and rear frame wall portions of the frame plates 71, 71 on the left and right sides of the filter support member 7, which form the guide grooves of the strainer 5. (71a). Thus, between the frame plate 73a, 73a part and the toothed belt 72c of the above-mentioned filter roll-in and rewind mechanism 72, 72 that constitutes the central action mechanism of the filter cleaning unit 6 described below, a second toothed belt 72c extending in the up-down direction is formed. A filter guide groove (filter movement space in the up and down direction) 12a. the

In addition, between the frame plates 73a, 73a on the left and right sides, pressing members 73c, 73c are provided corresponding to the filter guide members 75a, 75a on the side of the filter supporting member 7, and the pressing members 73c, 73c The vertical frame members 51a, 51a of the prefilter 5 are pressed so as to be slidable. the

(4) Structure of the filter cleaning unit 6 for scrubbing the filter surface of the strainer 5

On the other hand, the filter cleaning unit 6 is composed of a pair of left and right filter roll-in and return mechanisms 72 arranged on both sides of the front portion of the heat exchanger 4 (the front portion of the front side heat exchange portion 4a). , 72; the dust and other scraping brushes 16 of the rotor structure that are arranged correspondingly (facing) near the coarse filter roll-in start position of the filter roll-back mechanism 72,72; and the dust box 17. The filter is rolled into the rewind mechanism 72, 72 to roll the above-mentioned strainer 5 from the original assembly state (expanded state) shown in Figure 5, for example, to the annular state shown in Figure 6, or make it from the state of Figure 6 Return to the original unfolded state shown in Figure 5. The dust scraping off brush 16 scrapes off dust, dust, etc. attached to the mesh members 52 , 52 . . . of the prefilter 5 by scrubbing. The dust box 17 stores dust and the like scraped off by the dust and the like scraping brush 16 . the

The brush 16 for scraping off dust and the like and the dust box 17 are provided so as to straddle between the left and right ends of the heat exchanger 4 . the

In addition, the left and right pair of filter roll-in and rewind mechanisms 72, 72 are composed of the following components: a drive-side first toothed pulley 72a with a large diameter on the lower side; and a predetermined distance from the first toothed pulley 72a. On the upper side of the first toothed pulley 72a, the second toothed pulley 72b on the driven side whose diameter is smaller than that of the first toothed pulley 72a; Toothed belt 72c between 72a, 72b. For example, as shown in FIG. 3 , the protrusions (engaging pins) 53 , 53 . . . , 53 , 53 . The engaging holes (long holes) 13, 13... are provided on the toothed belt 72c at corresponding equal intervals in the longitudinal direction. the

The toothed belt 72c is precisely rotationally driven in forward and reverse directions (step driving) by driving the first toothed pulley 72a by, for example, the pulse motor M1 (M2) in FIG. 8 . For example, when the toothed belt 72c is driven in the forward rotation (clockwise rotation) direction, the above-mentioned prefilter 5 is properly assembled to the above-mentioned final configuration required for deploying the prefilter 5 through the above-mentioned first and second guide grooves 12a, 12b. Fixed position (upper end side). On the other hand, when the toothed belt 72c is driven in the reverse (counterclockwise) direction, substantially the entirety of the above-mentioned prefilter 5 is wound around the outer peripheral surface of the toothed belt 72c as in the cleaning state of FIG. 6 from the unfolded state in FIG. superior. When this reverse drive is performed, the first guide plate 14a is guided by the guiding action of the first guide plate 14a, the second guide plate 14b, the third guide plate 14c, the fourth guide plate 15a (rotation support shaft 15c) and the like. , The second guide plate 14b is located at the lower end side of the above-mentioned first guide groove 12a, and along the pulley surface of the above-mentioned first toothed pulley 72a, so as to keep the above-mentioned coarse filter 5 between the above-mentioned toothed pulley 72c The outer frame 51A, 51A is set to a predetermined rotation angle through the state of the required gap, and the third guide plate 14c is along the toothed belt 72c from the pulley face to the pulley direction of the second toothed pulley 72b. The back side is provided so as to be long in the vertical direction, and the fourth guide plate 15a is located on the second toothed pulley 72b on the upper end side, and presses the curved surface of the prefilter rolled up to this part by its own weight. the

Furthermore, when the strainer 5 is rolled from the state of FIG. 5 to the state of FIG. 6 , it is arranged under the above-mentioned first toothed pulley 72a in an abutting state (the above-mentioned first guide plate 14a and its predetermined rotation Between the second guide plate 14b at the rear of the corner) the scraping brush 16 for dust or the like sufficiently scrapes off the dust or dust etc. (the state of FIG. . The dust and other scraping brushes 16 are located in the dust collecting box 17 and are provided in the coaxial direction. Scraped dust, dust, etc. are reliably stored in the dust box 17 . Furthermore, this dust collecting box 17 is mounted on the frame body portion 3a of the above-mentioned main body casing 3 in a detachable manner, and can be disassembled regularly (or every predetermined operating time) to discard the dust or dust therein, and can be cleaned. Ministry of cleaning. the

If the engagement of the lower end side of the above-mentioned filter holding member 73 with respect to the filter support member 7 is released, and the lower end side is rotated toward the near side by a predetermined angle, for example, as shown in FIG. The pressed state of the 5b side against the toothed belt 72c. By pulling out the protrusions 53, 53... on the back side of the coarse filter 5 from the engagement holes 13, 13... of the toothed belt 72c (the protrusions 53, 53... are omitted in FIG. 4 ) , the detachment work of detaching the above-mentioned prefilter 5 from the filter support member 7 can be performed (see the direction of arrow a). the

In this case, since the filter holder 73 is pivotally supported on the filter support member 7 via the clutch mechanisms 76, 76, the open state at a desired angle shown in FIG. Needless to say disassembly, the reverse insertion and assembly work can also be easily performed. the

The assembling operation of the prefilter 5 into the above-mentioned filter support member 7 is performed as follows. For example, as shown by arrow b in FIG. 4 , the upper end 5a side of the prefilter 5 is inserted from the first lower side guide groove 12a toward the upper end side second guide groove 12b. At this time, an arc-shaped filter guide 15 b is formed on the upper end side of the fourth guide plate 15 a to guide the prefilter 5 at the time of insertion to the upper side. Then, from the middle part side, the convex bodies 53, 53... parts on the back side of the lower end 5b side (the back side of the outer frame 51A, 51A) are inserted and engaged respectively, for example, as shown by phantom lines in FIG. 3 . Each engagement hole 13, 13... of the front side portion of the toothed belt 72c (72c, 72c) is erected between the first and second toothed pulleys 72a, 72b (a pair of left and right sides). Furthermore, in this engaged state, the filter holder 73 is closed to its original state. Assembled in this way. the

Furthermore, thereafter, the above-mentioned front cover 3c is engaged with the front side movable guide mechanism portion of the main body case 3, and a desired filter operation switch is turned on. Then, the lower end 5b side of the above-mentioned prefilter 5 is temporarily reversed by a predetermined size to be drawn between the first and second guide plates 14a, 14b on the first toothed pulley 72a side, and then forwardly rotated so that the upper end 5a side faces upward. Protrudes the proper amount of size and eventually stops at the proper set position. Reaching the set position is detected by the filter detection unit LS composed of a limit switch provided at a predetermined position on the end side of the prefilter moving path, as in the case of stopping the "cleaning operation" described later. the

Furthermore, as a result, the prefilter 5 is assembled in the original unfolded state shown in FIG. 5 . the

In addition, for example, as shown in FIG. 2, the filter roll-in and rewind mechanism 72, 72 composed of the above-mentioned first and second toothed pulleys 72a, 72b, and a toothed belt 72c is aimed at the left and right sides that are divided into two along the left and right sides. A pair of filter support members 7, 7 and a pair of left and right prefilters 5, 5 corresponding to the pair of left and right filter support members 7, 7 are respectively provided in pairs on the left and right sides. Furthermore, between each pair of left and right first toothed pulleys 72a, 72a, 72a, 72a of each pair of left and right filter roll-back mechanisms 72, 72, 72, 72, they are coaxial with each other. In a continuous state, elastic rollers 77, 77 for backing up with substantially the same diameter as the first toothed pulleys 72a, 72a, 72a, 72a are provided. the

In addition, in this embodiment, for example, as shown in FIGS. From the side to the vicinity of the front side corner, a V-shaped heat exchange heat exchanger with a V-shaped cross-section (side surface) matching the shape of the V-shaped cross-sectional air passage portion (valley portion) 4c of the bent portion of the lambda heat exchanger 4 is integrally provided. Sealing plate 20 for top surface sealing. Thus, while the filter support member 7 is attached to the main body case 3, the λ-type heat is exchanged by the sealing plate 20 (the sealing portion 20a, the support frame portion 20b, and the mounting integrated portion 20c). The V-shaped air passage portion (valley portion) 4c of the bent portion of the device 4 is sealed. the

(5) The structure of the control circuit part

For example, as shown in FIG. 2, an electric box 18 is provided in the frame body 3a of the above-mentioned main body casing 3 so as to be positioned on the side of the above-mentioned heat exchanger 4. In the electric box 18, a microcomputer control unit is used as the The center has various control units as shown in FIG. 9 . the

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 is further provided with an air conditioning mechanism control unit 81 and the cleaning mechanism control unit 82 , and the outdoor unit control unit 83 is further provided with a humidification/ventilation control unit 84 . the

The air conditioner control unit 81 is composed of a front panel driving unit 81a, a horizontal flap driving unit 81b, a vertical flap driving unit 81c, and a fan driving unit 81d. And the cleaning mechanism control part 82 is comprised from the rotating brush drive part 82a, the filter drive part 82b, the filter detection part 82c, and the dust box detection part 82d. the

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 timing determination unit 80e, and the like. Thus, the indoor unit control unit 80 controls the above-mentioned air conditioning mechanism control unit 81 , cleaning mechanism control unit 82 , outdoor unit control unit 83 , and the like. the

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

The filter detection part 82c of the said cleaning mechanism control part 82 is comprised using the filter detection part LS comprised by the limit switch, for example as follows. Thereby, whether or not the above-mentioned attachment state of the prefilter 5 by the user at the time of attachment and the filter attachment state at the time of filter rewinding by the filter roll-in/rewind mechanism 72 , 72 is properly detected is determined. the

(6) Cleaning operation control

In the air conditioner A of the present embodiment constituted by the above structure, for example, in the unfolded state (normal position: corresponding to the above-mentioned state of FIG. 5 ) of the prefilter 5 shown in (a) of FIG. The above-mentioned filter is driven to be rolled into the rewinding mechanism 72, 72 and the scraping brush 16 rotation such as dust. Then, as shown in FIG. 10(b), the prefilter 5 is wound on the toothed belts 72c, 72c of the filter roll-in and rewind mechanisms 72, 72, and cleaning of the prefilter 5 is started. In addition, in the following description of "cleaning operation control", the movement of the prefilter 5 in the rolling direction is defined as the forward path movement, and the opposite movement in the rewinding direction is defined as the return path movement. the

Furthermore, finally, as shown in (c) of FIG. At P ₄ ), the cleaning of the coarse filter 5 is completed. The subsequent movement in the deployment direction shown in (a) of FIG. 10 becomes the above-mentioned return path movement.

The above-mentioned filter detection unit LS constituted by a limit switch is provided at a predetermined position on the terminal (upper end) side on the prefilter moving paths 12a, 12b. Therefore, when the upper end 5a of the strainer 5 is detected by the filter detection part LS, it can be known that the strainer 5 has returned to the state of (a) in FIG. 10 from the state of (c) in FIG. 10 and returned to the original The position (origin position) P ₀ . At this time, the driving of the above-mentioned filter roll-in and rewind mechanisms 72, 72 and the dust and the like scraping brush 16 is stopped.

(7) Problems when assembling the coarse filter 5 on the toothed belts 72c, 72c of the filter rewind mechanism 72, 72

However, in the case of driving the prefilter 5 using the filter roll-back mechanism 72 , 72 of the above kind, when the filter is installed with respect to the toothed belts 72 c , 72 c of the filter roll-back mechanism 72 , 72 (At the time of initial assembly after being temporarily disassembled...refer to Figure 3), due to the ease of filter installation work and the difference in the driving accuracy of the driving member, etc., it is necessary to install the prefilter 5 in the state of the structure. There is a certain degree of margin (margin in size). Sometimes, for example, as shown in FIG. 53..., 53, 53... and toothed belts 72c, 72c are easily engaged with the toothed belts 72c, 72c. There are requirements for the degree of roughness of the engaging parts of the holes 13, 13.... In this case, a predetermined amount of deviation (the amount of deviation from the predetermined abutting position on the design structure) inevitably occurs in the filter moving path direction at the user's filter installation position. In an extreme case, in FIG. 3 , there is a difference whether the engagement starts from the lowermost belt-side engagement hole 13 , 13 or starts from the uppermost engagement hole 13 , 13 as shown in the figure. the

Therefore, when the filter detection unit (limit switch) LS is assumed to be installed corresponding to the normal normal arrival position (structural contact position (structural position)) _P0 shown in FIG. , depending on the installation situation of the user, the above-mentioned filter detection part (limit switch) LS may erroneously detect the installation state of the prefilter 5 .

As a result, as already described, in the structure of the filter cleaning unit of the conventional filter driving method, after the filter is installed, the filter detection control logic for detecting the presence or absence of the filter must be executed first, and then the filter is driven. The filter cleaning control of the filter cleaning unit has a problem that it takes an excessive amount of time until the actual cleaning starts. the

Therefore , in the present embodiment, in order to solve this problem, for example, as shown in (a), (b) and FIG. 12 of FIG. The resulting displacement of the filter mounting position correspondingly sets the filter detection part LS on the inside of the filter moving path from the end of the filter moving path represented by the first and second guide grooves 12a, 12b ( The filter installation position in Fig. 2) after correcting the offset. That is, the filter detection unit LS is provided at a position shifted (offset) by the above-mentioned offset amount from the filter structure contact position (normal arrival position: origin position) _P0 toward the offset canceling direction. Thereby, it is possible to cancel out the above-mentioned amount of displacement caused by the user attaching the prefilter 5 , and to reliably detect the prefilter 5 when attaching the prefilter 5 . In addition, in FIGS. 11 and 12 , the filter position correction amount a represents the offset amount from the structural contact position of the filter. In addition, the limit switch confirmation movement amount b indicates the movement amount by which the limit switch from the normal position is reliably "mounted→non-mounted". The additional conveyance amount c of the filter represents the maximum movement amount correction when the return path moves.

Therefore, according to this configuration, it is possible to eliminate the erroneous detection of the mounting state of the prefilter due to how the user attaches the prefilter conventionally, and it is possible to simplify the filter detection logic after the prefilter is mounted. the

Furthermore, since the filter detection logic can be simplified, the time until cleaning starts is shortened. the

In addition, the positional displacement at the time of this filter assembly is corrected in control by the origin correction control shown, for example in the timing chart of _FIG . In addition, by this origin point correction operation, it is also possible to detect failure of the above-mentioned filter detection unit LS at the same time.

_That is, in this control, the prefilter 5 is not stopped at the normal position (origin position) P ₀ shown in (a) of FIG. 10 (b) shows the direction of the passage (the direction of the maximum position P ₄ ) beyond the installation position (detection position) P ₂ of the prefilter 5 and moves the distance b that the prefilter 5 is completely detected as non-assembled and stops (the non-assembled position). Assembly stop position P ₃ ).

At this time, if the filter detection unit LS is not in the non-attachment detection operation (no detection signal), it is assumed that the filter detection unit LS is malfunctioning or the prefilter 5 is not moving, and it is determined that the filter is abnormal. the

In addition, the prefilter 5 is reversed and moved to the origin position P ₀ in the direction of the return passage. Its operation stops after the number of pulses as many as the above-mentioned filter offset distance a. In this way, even if the prefilter 5 is reversed and moved in the return passage by the non-assembly confirmation movement amount b, if it is not in the "assembled" state, it is determined that the movement of the prefilter 5 is obstructed or the filter detection part LS is malfunctioning. Causes a filter exception.

In addition, FT (time) in FIG. 13 represents bidirectional excitation time for reliably stopping or reversing the stepping motor M ₁ (M ₂ ).

In addition, Fig. 14 is when the upper end of the above-mentioned prefilter 5 moves from (a) of Fig. 10 (a) in the normal position (origin position) P ₀ to the maximum movement position P ₄ of Fig. 10 (b) when the going path is driven (filtering Fig. 15, on the contrary, is the time sequence when the above-mentioned prefilter 5 is driven from the maximum movement position P ₄ of Fig. 10 (b) back to the return path of the origin return position P ₀ of Fig. 10 (a) picture. In FIG. 14, the case where the prefilter 5 does not become "non-assembled" even if the distance b is driven, and the case where the prefilter 5 is not detected even if the filter detection part LS is driven for a distance a+c+d in FIG. It was detected that the coarse filter 5 was abnormal. 14, FIG. 15, the detection means of the detection part 82d of the dust box 17 provided separately detects that the filter is not attached, and it is detected as an abnormality of the dust box 17. In this way, abnormality detection can be performed.

As described above, in the configuration of the present embodiment, the movement state of the prefilter 5 when moved by the filter roll-in and rewind mechanisms 72 and 72 is also configured to be detected by the filter detection unit LS. the

According to such a structure, the movement state of the prefilter 5 itself can be accurately detected by the filter detection part LS. the

In addition, in this structure, in this case, when the prefilter 5 is moved by the above-mentioned filter rewinding mechanism 72, 72, the filter can be used up to the installation position of the above-mentioned filter detection part LS. The presence or absence of the filter detection signal of the detection part LS is used to judge whether the prefilter 5 can move. , 72 driving amount (the number of driving pulses of the stepping motor M ₁ (M ₂ )) is detected.

According to such a configuration, as described above, false detection of filter attachment due to the user's attachment of the filter can be eliminated, the detection logic after filter attachment can be simplified, and the time until cleaning starts can be shortened. And, since the filter detection up to the detection position based on the filter detection part LS and the filter detection during the subsequent movement are performed by two different members, it is possible to accurately and reliably detect the failure and filtration of the filter detection part. Abnormality of filter 5 including device movement disorder. the

And, as mentioned above, in this embodiment, it may also be configured such that when the filter assembly inspection based on the filter cleaning operation of the above-mentioned filter cleaning unit 6 is started, after the above-mentioned prefilter 5 is installed, when there is a filter based on the above-mentioned When there is a filter detection signal from the filter detection part LS, only the abnormality detection and origin correction control of the above-mentioned filter detection part LS are performed, and when there is no filter installation detection signal based on the filter detection part LS, other than the above-mentioned filter detection part In addition to the abnormality detection and origin correction control of LS, it also detects whether a filter is installed or not. the

According to this configuration, even when there is no installation signal of the prefilter 5 by the filter detection unit LS, it is possible to detect whether or not a filter is attached in addition to the above-mentioned abnormality detection and origin correction control by the filter detection unit LS. the

Claims (4)

1. An air conditioner with a filter cleaning unit, characterized in that, The air conditioner with filter cleaning unit has: The main body casing (3), which has an air suction port (1) and an air blowing port (2); A heat exchanger (4), which is arranged in the middle of the air passage from the air suction port (1) to the air blowing port (2) in the main body casing (3); a filter (5), which is configured correspondingly to the primary side air suction surface of the heat exchanger (4); A filter drive unit for mounting the filter (5) and moving the filter (5) through a filter moving path (12a, 12b) along the air suction surface of the heat exchanger (4) ; a filter detection unit (LS) provided at a predetermined position on the terminal side of the filter moving path (12a, 12b); a filter cleaning unit (6) that cleans the filter surface of the filter (5) in the middle of the filter moving path (12a, 12b); and a fan (70), which is arranged on the secondary side of the heat exchanger (4), The filter detection part (LS) is provided at the end point (P ₀ ) of the filter movement path (12a, 12b) toward the filter movement path corresponding to the offset amount of the attachment position of the filter (5). The internal position after correcting the offset amount can be generated according to the installation condition of the filter (5) relative to the filter drive part. 2. The air conditioner with a filter cleaning unit according to claim 1, wherein In the air conditioner, the moving state of the filter (5) when moved by the filter drive unit is also detected by the filter detection unit (LS). 3. The air conditioner with a filter cleaning unit according to claim 1 or 2, wherein: The air conditioner is configured to use the filter of the filter detection unit (LS) up to the position where the filter detection unit (LS) is installed when the filter (5) is moved by the filter drive unit. Whether or not the above-mentioned filter (5) can be moved is determined by detecting the presence or absence of the signal; Whether above-mentioned filter (5) can be moved. 4. The air conditioner with a filter cleaning unit according to claim 1 or 2, wherein: The air conditioner is configured such that when the filter assembly state is inspected when the filter cleaning unit (6) starts cleaning the filter (5), after the filter (5) is installed, when there is When based on the filter detection signal of the above-mentioned filter detection part (LS), only the abnormality detection and origin correction control of the above-mentioned filter detection part (LS) are performed; on the other hand, when there is no When the attachment detection signal of the filter (5) is detected, whether the filter is attached or not is detected in addition to the abnormality detection and origin correction control of the filter detection unit (LS).

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