WO2006043430A1

WO2006043430A1 - Air conditioner

Info

Publication number: WO2006043430A1
Application number: PCT/JP2005/018603
Authority: WO
Inventors: Norimasa Ishikawa; Yasushi Jinno; Hisashi Hiratani; Satoshi Tokura; Masahiro Bamba
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2004-10-18
Filing date: 2005-10-07
Publication date: 2006-04-27
Also published as: JP4050774B2; JPWO2006043430A1; MY139120A; TW200628736A; TWI351498B

Abstract

An air conditioner having an indoor unit in which a heat exchanger and a fan for blowing out air that is subjected to heat exchange by the heat exchanger are received. In the air conditioner, there is provided a filter device that is constructed from a filter net for removing dust in the air passing the heat exchanger, a suction nozzle drivable in a first direction, along the filter net, and a suction device connected to the suction nozzle. The suction nozzle has a nozzle body having an opening and a belt having suction holes, the belt being driven in a second direction orthogonal to the first direction, along the opening while covering it. Further, a position detection means for detecting the position in the second direction of the suction holes is installed to enable cleaning performance of the suction nozzle to be changed depending on the position of the suction hole detected by the position detection means.

Description

Specification

Air conditioner

Technical field

[0001] The present invention relates to an air conditioner having a function of automatically cleaning an air filter provided in an air suction port of an indoor unit.

Background art

[0002] In a conventional indoor unit of an air conditioner, an air filter is installed in front of the heat exchanger to prevent dust from entering the inside of the main body, and the air filter removes the adhering dust. Removably attached to the filter frame as possible. In such a configuration, the filter device requires frequent maintenance, and the air filter gradually clogs until the maintenance is performed. As a result, the amount of air passing through the heat exchanger ^^ The air conditioning capacity is lowered and the power consumption is increased.

[0003] For this reason, an air conditioner with an automatic cleaning function that periodically cleans dust attached to the air filter with a brush has been proposed in order to reduce maintenance work of the air filter (for example, (See Patent Document 1.) o

[0004] Also, the dust suction part force that can move freely on the filter The dust on the filter is sucked by the suction fan, and the dust is stored in the dust storage part via the suction duct, and the filter dust is automatically collected. An air conditioner with an automatic cleaning function has also been proposed! (See, for example, Patent Document 2).

Patent Document 1: Japanese Patent Laid-Open No. 6-74521

Patent Document 2: JP 2002-340395 A

Disclosure of the invention

Problems to be solved by the invention

[0006] In the air conditioner described in Patent Document 1, however, the brush and the air filter are rubbed against each other, so that dust is entangled with the brush, or the brush is worn or deformed to deteriorate its function. There was a problem. Also, after a certain amount of time has passed, the dust collected by brushing must be processed, greatly reducing the maintenance effort. It wasn't a force.

On the other hand, in the air conditioner described in Patent Document 2, the amount of dust adhering to the air filter varies depending on the usage time and environment of the air conditioner, and the dust is not cleaned for a long time. If the amount of dust is excessive or not cleaned for a long time, the dust cannot be completely cleaned and the dust remains on the air filter. There was a problem.

[0008] Further, the dust accumulated in the dust container must be thrown away by the user, and it has not always been possible to greatly reduce the labor of cleaning. This viewpoint power is also preferred as an automatic cleaning device that can clean the entire filter surface of an air conditioner. The small dust suction part that can move in two directions on the filter also sucks the dust on the filter with a suction fan, A cleaning method that discharges to the outside via an exhaust duct is preferred.

However, in such a method, there is a problem that dust sucked during cleaning gradually accumulates inside the suction duct and the exhaust duct and the suction air volume decreases, and as a result, the cleaning performance of the filter decreases. there were.

[0010] Further, when the entire surface of the filter is cleaned, the cleaning time becomes long, and the air conditioning function is limited during that time, and there is a problem that the user's use and convenience are deteriorated.

[0011] In addition, the air filter of the air conditioner is generally bent, and the upper part is in the horizontal direction.

The lower part is in the vertical direction. In such a case, the amount of dust adhering to the air filter is usually high at the top and low at the bottom. For this reason, if dust is sucked into the upper and lower parts of the air filter with the same suction airflow, unevenness will occur in the removal, and in some cases, dust will remain in the upper part, and the suction airflow will be more than necessary at the lower part, resulting in wasted power. The challenge of consuming energy.

[0012] The present invention has been made in view of the above-described problems of the prior art, and improves usability for the user and removes dust adhering to the air filter reliably and efficiently. The purpose of the present invention is to provide an air conditioner that does not consume wasteful power without deteriorating the cleaning performance of the air filter.

Means for solving the problem

[0013] To achieve the above object, the present invention provides a heat exchanger and air heat-exchanged by the heat exchanger. An air conditioner having an indoor unit that houses a fan that blows air into a room, a filter network that removes dust from the air that passes through the heat exchange, and is driven in a first direction along the filter network And a filter device configured by a suction device connected to the suction nozzle, the suction nozzle including a nozzle body having an opening.

A belt having a suction hole that is driven in a second direction perpendicular to the first direction along the opening while covering the opening, and in the second direction of the suction hole A position detection means for detecting the position is provided, and the cleaning ability of the suction nozzle can be changed according to the position of the suction hole detected by the position detection means.

[0014] The cleaning ability of the suction nozzle can be changed by changing the number of times the suction arch I nozzle is sucked in the first direction according to the position of the suction arch I hole detected by the position detection means, This can be done by changing the suction amount of the suction nozzle or changing the drive speed of the suction nozzle.

[0015] Further, a dust detection means for detecting the amount of dust adhering to the filter net is further provided so that the cleaning ability of the suction nozzle can be changed in accordance with the amount of dust adhering detected by the dust detection means. Well, ...

[0016] In this case, the cleaning ability of the suction nozzle can be changed by changing the suction amount or driving speed of the suction nozzle in accordance with the amount of dust attached detected by the dust detection means.

[0017] In the present invention, the suction nozzle is reciprocated in the first direction to clean the first portion of the filter mesh, and then the suction hole is moved in the second direction. The suction arch I nozzle is reciprocated in the first direction to clean a second portion different from the first portion of the filter mesh, and this is repeated to clean the entire surface of the filter mesh. It is characterized by having a mode.

[0018] In the cleaning mode, the filter screen is set to be cleaned sequentially from the bottom to the top, and when the suction nozzle reaches the end in the first direction of the filter mesh, the suction nozzle and the It is preferable to stop the movement of the suction hole.

[0019] In the cleaning mode, the fan is set to operate at a lower speed than in the air conditioning operation. It is preferable to clean only a part of the filter net and end the cleaning mode.

[0020] Further, at the end of the cleaning mode, the suction hole is moved to the next cleaning start position, and the fan is returned to the air conditioning operation.

[0021] The filter device includes a suction duct for connecting the suction nozzle and the suction device, and a suction duct dust discharge mode in which the suction air volume in the suction duct is increased as compared with that in the cleaning mode is provided. You can also. Further, the filter device may include an exhaust duct connected to the suction device, and may be provided with an exhaust duct dust mode in which the exhaust air volume in the exhaust duct is increased as compared with the suction duct dust mode.

[0022] In this case, the number of rotations of the suction fan during the cleaning mode of the suction fan provided in the suction device, the suction duct dust mode or the exhaust duct dust mode is changed according to the length of the exhaust duct. It is good to do.

The invention's effect

[0023] Since the present invention is configured as described above, the following effects can be obtained.

The suction capacity of the suction arch I nozzle can be changed according to the position of the suction arch I detected by the position detection means. It is possible to prevent dust from remaining by increasing. The same effect can be obtained by changing the suction amount or drive speed of the suction nozzle.

[0024] Further, a dust detection means for detecting the amount of dust attached to the filter net is further provided, and the suction amount or driving speed of the suction nozzle is changed in accordance with the amount of dust detected by the dust detection means. In addition, the amount of dust adhering to the filter mesh can be reduced as much as possible, the time required for filter cleaning can be shortened, and power consumption can be further suppressed.

[0025] Further, when cleaning the filter mesh, the suction nozzle is reciprocated in the first direction, and then the suction hole is moved in the second direction to change the position of the suction hole. Similarly, the suction nozzle is moved to the second position of the filter mesh. A cleaning mode is provided to perform the reciprocating movement in the direction of 1 multiple times to clean the entire surface of the filter network.As a cleaning mode is provided, the remaining dust that cannot be sucked during the forward movement of the suction nozzle I nozzle is sucked again during the backward movement. This can prevent dust from being left behind. In addition, since the sucked dust is discharged to the outside through the exhaust duct, the user's filter net is cleaned. Can be saved as much as possible.

[0026] Furthermore, especially when the amount of dust attached is large! When the filter net is cleaned for a long time, and if the reciprocating operation in the first direction is repeated a plurality of times, the In this reciprocating operation, dust that cannot be collected can be removed, and uncollected dust can be prevented.

[0027] In addition, especially when the amount of dust attached is large! When the dust accumulates on the vertical part of the filter mesh, it may be swept away by the suction nozzle. Since the dust is removed from the suction hole, the dust removed from the suction hole can be sucked from the lower suction hole, and the lower part of the suction hole has already been cleaned. There is no sediment that cannot be removed.

[0028] In addition, even if the amount of dust adhering to the filter net is large, suction hole force Even if dust that cannot be sucked is attracted to the left end or right end by the suction nozzle and remains in the filter net as a lump In the cleaning mode, when the suction nozzle force reaches the left or right edge of the filter network, the movement of the suction nozzle and the suction hole is stopped, so that the suction hole can be sucked and sucked in during the stop. Can be prevented.

[0029] When the fan is operated at high speed during the cleaning mode, an air flow is generated around the suction nozzle by the fan in the direction opposite to the direction of dust suction, and the dust suction force of the suction nozzle is reduced. The specified cleaning performance can be maintained by operating the fan at low speed during the cleaning mode.

[0030] Further, if the fan is operated at a low speed during the cleaning mode, the air conditioning function inherent to the air conditioner cannot be fully exhibited. Furthermore, since it takes a long time to clean the entire surface of the filter network (for example, 30 minutes), the air conditioning function is limited for the user. Therefore, by limiting the cleaning site per time to a part of the filter network, the time per cleaning can be shortened, and the user convenience can be improved.

[0031] When the filter cleaning is completed, the suction hole is moved to the next cleaning start position, so that it is not necessary to move the suction hole to the cleaning start position when the next cleaning starts, and the next filter cleaning time is shortened. This improves user convenience. Also, by limiting the fan to low speed operation during filter cleaning, the air conditioning function can be quickly recovered after the filter cleaning is completed, and user convenience is improved. [0032] In addition, when a suction duct dust exhaust mode in which the suction air volume in the suction duct is increased as compared with that in the cleaning mode is provided, the air flow rate in the suction duct is increased and accumulated in the suction duct during the cleaning mode. Dust can be blown away, and deterioration in cleaning performance can be prevented. In addition, if an exhaust duct dust mode is provided in which the exhaust air volume in the exhaust duct is increased compared to that in the suction duct dust mode, the air flow rate in the exhaust duct is increased and the air speed in the exhaust duct is increased. The dust accumulated in the exhaust duct can be blown off during the heating, and the deterioration of the cleaning performance can be prevented.

[0033] In addition, the length of the outside of the exhaust duct varies depending on the state of the air conditioner installation site, and as the length increases, the suction air volume in the cleaning mode decreases, and the suction performance decreases. Therefore, if the number of rotations of the suction fan in the cleaning mode is changed according to the length of the exhaust duct when the air conditioner is installed, the cleaning performance of the filter can be maintained properly.

[0034] Similarly, if the number of rotations of the suction fan in the suction duct dust mode or the exhaust duct dust mode is changed according to the length of the exhaust duct, the suction duct dust performance or the exhaust duct length depends on the length of the exhaust duct. Fluctuations in the exhaust duct dust performance can be prevented and the filter cleaning performance can be maintained appropriately.

Brief Description of Drawings

[0035] FIG. 1 is a cross-sectional view of an indoor unit of an air conditioner according to the present invention.

FIG. 2 is a perspective view of a filter device provided in the indoor unit of FIG.

FIG. 3 is a perspective view of a suction nozzle provided in the filter device according to the first exemplary embodiment of the present invention.

FIG. 4 is an exploded perspective view of the suction nozzle of FIG.

FIG. 5 is a sectional view taken along line V—V in FIG.

[Fig. 6] Fig. 6 is a schematic diagram showing the positions of the suction holes according to the cleaning range of the filter mesh. (A) shows the position of the suction holes when cleaning range A, and (b) shows the range B. Show the position of the suction hole when cleaning, (c) shows the position of the suction hole when cleaning range C, (d) shows the position of the suction arch I hole when cleaning range D! The

FIG. 7 is a schematic diagram showing a suction cleaning sequence of the filter device.

[Fig. 8] Fig. 8 is another schematic diagram showing the suction cleaning order of the filter device. [FIG. 9] FIG. 9 is a cross-sectional view taken along line V—V in FIG. 3, and particularly shows a modification of the suction nozzle.

FIG. 10 is a perspective view of a suction nozzle provided in the filter device according to the second embodiment of the present invention.

FIG. 11 is a sectional view taken along line XI-XI in FIG.

[FIG. 12] FIG. 12 is a schematic diagram showing the position of the suction arch I hole according to the cleaning range of the filter mesh.

) Is the position of the suction hole when cleaning range A, (b) is the position of the suction hole when cleaning range B, (c) is the position of the suction hole when cleaning range D, ( d) shows the positions of the suction holes in the suction duct dust removal mode.

FIG. 13 is a schematic diagram showing a suction arch I cleaning sequence of the filter device.

FIG. 14 is a graph showing the relationship between the suction air volume and the length of the exhaust duct.

Explanation of symbols

2 Indoor unit body

4 Heat exchanger

6 fans

8 Filter device

10 Filter frame

10a Guide rail

12 Filter network

14 Suction Nozure

16 Suction duct

18 Suction device

20 Exhaust duct

22 Nozzle body

22a Nozzle opening (first nozzle opening)

22b Second nozzle opening

24 Benoleto

24a Suction hole (first suction hole) 24b Second suction hole

26 Indicator

28 Suction hole sensor

30 Drive hole

32 Stepping motor

34 Gear

36, 38 switch

40 Dust sensor

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

Fig. 1 is a cross-sectional view of an indoor unit of an air conditioner that is effective in the present invention. Inside the indoor unit body 2, indoor air is taken in through the heat exchanger 4 and the heat exchanger 4, and the heat exchanger 4 The fan 6 for blowing the air heat-exchanged in the room into the room and the filter device 8 arranged on the upstream side of the heat exchanger 4 are accommodated. The air is sucked in by the operation of the suction loca fan 6 and dust floating in the air is removed by the filter device 8 provided between the suction port and the heat exchanger 4.

As shown in FIG. 2, the filter device 8 that removes dust from the air passing through the heat exchanger 4 includes a filter frame 10, a filter network 12 that holds the filter frame 10, and a filter network 12 And a suction nozzle 14 which is slidable along the surface. Further, the filter frame 10, the filter network 12, and the like are bent, and the upper part is configured in the horizontal direction and the lower part is configured in the vertical direction. The suction nozzle 14 can be smoothly moved to the left and right with a very narrow gap from the filter mesh 12 by a pair of guide rails 10 a installed at the upper and lower ends of the filter frame 10, and dust adhering to the filter mesh 12. Is sucked from the suction nozzle 14. Further, one end of the suction duct 16 is connected to the suction nozzle 14, and the other end of the suction duct 16 is connected to the suction device 18. The suction device 18 is a device using a fan motor capable of adjusting the rotation speed so that the suction amount can be varied. The suction duct 16 is formed of a duct that can be folded so as not to interfere with the movement of the suction nozzle 14. Further, an exhaust duct 20 is connected to the suction device 18. , Pulled out of the room. Dust adhering to the filter net 12 and sucked by the suction nozzle 14 is discharged to the outside through the suction duct 16, the suction device 18, and the exhaust duct 20.

Next, the suction nozzle 14 will be described with reference to FIGS. 3 to 5.

Fig. 3 is a view of the suction nozzle 14 as viewed obliquely upward. As shown in Fig. 3, the suction nozzle 14 surrounds the nozzle body 22 that serves as a flow path for the sucked air and the nozzle body 22. It is composed of a belt 24 with a width of 20mm. A slit-like nozzle opening 22a having a length of 320 mm (corresponding to the vertical length of the filter net 12) and a width of 3 mm is formed on the surface of the nozzle body 22 on the filter net 12 side. On the other hand, the belt 24 is formed in a loop shape and is wound around the outer periphery of the nozzle body 22 so as to cover the nozzle opening 22a. Belt 24 is provided with a suction arch | hole 24a with a length of 80 mm (vertical length 1Z4 of filter mesh 12) and a width of 2 mm, so that suction hole 24 4a is positioned directly above nozzle opening 22a. Belt 24 is attached. An indicator 26 is provided on the side surface of the suction hole 24a in order to detect its position. Inside the suction nozzle 14, a suction hole sensor 28 is provided so as to come into contact with the instruction unit 26 so that the position of the instruction unit 26 can always be detected and the position of the suction hole 24 a can be detected. Yes. The belt 24 is provided with equally spaced drive holes 30 at both ends of the belt 24, and the gear 34 attached to the stepping motor 32 fixed on the nozzle body 22 meshes with the drive holes 30. As a result, the belt 24 can be driven freely in either the vertical direction.

FIG. 4 is a view showing the nozzle body 22 and the belt 24 separately in FIG. 3, and FIG. 5 is a cross-sectional view of the suction nozzle 14 (cross-sectional view along line V—V in FIG. 3). ).

In the suction nozzle 14 having such a configuration, as another configuration for driving the belt, a method of driving the belt 24 with a rubber roller or the like without using the gear 34 can be considered. In the embodiment of the present invention, the belt 24 is formed in a loop shape in order to reduce the size of the apparatus, but there is a method of winding the belt by providing a reel or the like.

In the present embodiment, the entire surface of the filter mesh 12 is suction-cleaned by the suction nozzle 14 having the above-described configuration, and the specific operation will be described with reference to FIGS. 2 and 6 to 8.

[0043] FIG. 6 shows the suction holes 24a corresponding to the cleaning ranges A, B, C, and D of the filter mesh 12 shown in FIG. It is the figure which showed the position (figure which looked at the suction nozzle 14 from the back). As shown in Fig. 2, the actual suction nozzle 14 has a structure that is bent along the filter mesh 12. Fig. 6 shows that the suction nozzle 14 is straightened for easy viewing. Describe it.

First, when the area A of the filter mesh 12 in FIG. 2 is suction-cleaned, the belt 24 is driven to fix the suction hole 24a to the position A as shown in FIG. 6 (a). While sucking in this state, the suction nozzle 14 is driven to the left end of the right end force of the filter screen 12 so that the horizontal range A of the filter screen 12 can be sucked and cleaned.

Next, in order to shift to suction cleaning in the range B of the filter mesh 12 in FIG. 2, the belt 24 is driven to fix the suction hole 24a at the position B shown in FIG. 6 (b). Similarly, when the suction arch I nozzle 14 is driven to the right end of the filter net 12 while sucking in this state, the horizontal range of B of the filter net 12 in FIG. Similarly, the area C and D of the filter network 12 in FIG. 2 can be suction-cleaned. Since the range of C and D of the filter network 12 in FIG. 2 is provided in the horizontal direction, the amount of dust attached is larger than the range of A and B, and a larger amount of suction is required. Fig. 7 and Fig. 8 are diagrams showing the order of this suction cleaning with arrows. The range of A and B in the filter network 12 in Fig. 2 is to suck one horizontal row as shown in Fig. 7. Clean the nozzle 14 by moving it horizontally only in one direction, and in the range C and D of the filter network 12 in Fig. 2, the horizontal direction of the suction nozzle 14 is moved in both directions as shown in Fig. 8. (Reciprocating) to clean. By performing the horizontal swivel bow I operation like this, the entire surface of the filter network 12 can be cleaned substantially uniformly.

As shown in FIG. 2, limit switches 36 and 38 are provided on both sides of the filter frame 10, and the suction nozzle 14 abuts against these limit switches 36 and 38, thereby Slur 14 reciprocates horizontally. Details thereof will be described later in a second embodiment.

[0047] According to the present embodiment, the position of the suction hole 24a can be detected. When the position of the suction hole 24a is above the filter mesh 12, the suction nozzle 14 is driven to reciprocate, and the number of suctions is reduced. By increasing the number, it is possible to prevent dust from remaining. That is, the entire surface of the filter network 12 can be cleaned substantially uniformly by changing the cleaning ability of the suction nozzle 14 according to the position of the suction hole 24a detected by the suction hole sensor 28 as the position detection means. [0048] Further, when the position of the suction hole 24a is above the filter net 12, it is possible to prevent the dust from remaining by increasing the output of the suction device 18 and increasing the suction amount. In this case, the suction nozzle 14 performs cleaning as shown in FIG.

[0049] Furthermore, when the position of the suction hole 24a is above the filter net 12, the residual speed of the suction nozzle 14 can be reduced by reducing the horizontal driving speed of the suction nozzle 14 and increasing the suction time. I'll do it.

[0050] As shown in FIG. 9, the nozzle body 22 is provided with a dust sensor 40 for detecting the amount of dust adhering to the surface of the filter mesh 12, and the portion where the amount of dust detected by the dust sensor 40 is large is Then, after aligning the suction hole 24a detected by the suction hole sensor 28 with the relevant part, increase the output of the suction device 18 locally to increase the suction amount or locally increase the horizontal driving speed of the suction nozzle. It is also possible to prevent dust from remaining by increasing the suction time by lowering. In other words, the entire surface of the filter mesh 12 can be cleaned substantially uniformly by changing the cleaning ability of the wick I nozzle 14 according to the amount of dust detected by the dust sensor 40 as the dust detection means. it can.

[0051] Embodiment 2.

10 and 11 show the suction nozzle 14A provided in the indoor unit of the air conditioner according to Embodiment 2 of the present invention, and the outer periphery of the nozzle body 22 so as to cover the first nozzle opening 22a. A first suction hole 24a (for example, a width of 5 mm and a height of 50 mm) for sucking dust is formed in the belt 24 wound around the first suction hole 24a, and the first suction hole 24a is a first nozzle opening. The belt 24 is attached so as to be directly above the portion 22a.

[0052] A pair of second nozzle openings 22b having a predetermined length are formed on both sides of the first nozzle opening 22a in the vicinity of the upper end of the nozzle body 22, and the belt 24 A pair of second suction holes 24b having a predetermined length are formed on both sides of the first suction hole 24a.

[0053] The air conditioner according to the present embodiment includes a cleaning mode for sucking dust adhering to the filter net 12, a suction duct dust mode for discharging dust remaining in the suction duct 16, and an exhaust. It has an exhaust duct dust discharge mode for discharging dust remaining in the duct 20. In the cleaning mode, the second suction hole 24b is blocked by the nozzle body 22, while the suction duct discharge In the dust mode and the exhaust duct dust discharge mode, the second nozzle opening 22b and the second suction hole 24b are communicated to increase the air volume.

Since other configurations are the same as those of the first embodiment, description thereof is omitted.

Next, the operation for cleaning the entire surface of the filter network 12 in the indoor unit configured as described above will be described with reference to FIG. 12 and FIG.

[0055] When the cleaning of the filter network 12 is started, the cleaning mode is first selected, and the fan 6 is operated at a low speed.

(Lower speed operation than air-conditioning operation), the belt 24 is driven and the first suction hole 24a is fixed at the position A in FIG.

[0056] In this state, the rotation speed of a suction fan (not shown) provided in the suction device 18 is operated at S1 (eg, 4000 rpm), the suction nozzle 14 is moved to the left end, and the left limit switch is moved. When 36 detects the suction nozzle 14 and reaches the left end, the movement of the suction nozzle 14 is stopped for 5 seconds. During this 5 seconds, the dust mass attracted by the suction nozzle 14 can be sucked.

[0057] After that, the suction nozzle 14 is moved to the right end as well as the left end force. The right limit switch 38 detects the suction nozzle 14, and when it reaches the right end, the cleaning of the range A of the filter network 12 is completed.

[0058] After the suction nozzle 14 reaches the right end, the movement of the suction nozzle 14 is stopped for 5 seconds, and then the belt 24 is driven to fix the first suction hole 24a to the position B of the filter network 12 in FIG. Do

Thereafter, similarly, the range of B to D of the filter network 12 in FIG. 2 is cleaned. FIG. 13 is a diagram showing the cleaning sequence in the present embodiment, which combines the left and right movements of the suction nozzle 14 by the solid line arrows and the intermittent operation from the lower side to the upper side of the first suction hole 24a by the broken line arrows. Therefore, it is possible to prevent dust from being burned off in the vertical part (A to B position) of the filter net 12.

[0060] Furthermore, dust that cannot be sucked in the forward path can be sucked in the return path, so that uncollected dust can be prevented and the entire surface of the filter network 12 can be automatically cleaned.

[0061] Since the sucked dust can be discharged to the outside through the exhaust duct 20, the user's filter network

This eliminates the need for twelve cleaning efforts.

[0062] When the entire cleaning of the filter screen 12 is finished, the cleaning mode is finished and the suction duct dust discharge mode is finished. Migrate to In the suction duct dust removal mode, the belt 24 is driven and the first suction hole 24a is shown.

12 Secure at the position shown in (d).

[0063] In the suction duct dust discharge mode, the second suction hole 24b of the belt 24 and the second nozzle opening 22b of the nozzle body 22 are aligned, so that the suction air volume from the suction nozzle 14 is greater than that in the cleaning mode. The dust accumulated in the suction duct 16 is discharged with an increased air volume. As a result, it is possible to prevent a decrease in the cleaning performance of the filter.

[0064] If the first suction hole 24a is held for 10 seconds at the position of the duct dust exhaust mode, the suction duct dust exhaust mode is terminated and the exhaust duct dust exhaust mode is entered.

[0065] In the exhaust duct dust removal mode, the number of rotations of the suction fan of the suction device 18 is increased to S2 higher than S1 (for example, 5000rpm) while the first suction hole 24a remains in the suction duct dust removal mode position.

The air volume in the exhaust duct 20 is further increased.

[0066] By holding this for 15 seconds, the dust accumulated in the exhaust duct 20 is discharged to the outside.

. Thereby, the fall of the cleaning performance of a filter can be prevented.

[0067] When the exhaust duct dust removal mode ends, the fan 6 is returned to high speed operation to restore the air conditioning function, and the belt 24 is driven to return the first suction hole 24a to the position A of the filter network 12.

[0068] As a result, the air conditioning function can be quickly restored, and the next filter network 1

Since the first suction hole 24a is already at the cleaning start position at the start of the cleaning of 2, the cleaning time can be shortened without the need to move the first suction hole 24a. improves.

[0069] If the filter network 12 has not been cleaned for a long time, the first suction hole 24a is fixed at the position A in FIG. 13 during the cleaning mode, and the suction nozzle 14 is reciprocated left and right several times. After repeating (for example, 2 reciprocations), the first suction hole 24a is moved to the position B, and thereafter the same is repeated to the position D.

[0070] As a result, each part of A to D is repeatedly sucked. Therefore, when the amount of dust is large or the filter network 12 is cleaned for a long time, the dust attached to the filter network 12 is removed. It is possible to prevent leftovers.

[0071] In addition, if the entire surface of the filter mesh 12 is cleaned, the air conditioning function is restricted for a long time. Therefore, when the position A of the filter mesh 12 is cleaned in FIG. You may make it transfer to drawing duct dust discharge mode.

[0072] This makes it possible to shorten the cleaning time per cleaning of the filter network 12, and to use the air conditioning function during the cleaning of the user power S filter network 12, but there is no need to wait for a long time! ,. Then, the next cleaning of the filter network 12 is started from the B position.

[0073] Fig. 14 is a graph showing the relationship between the suction air volume and the length of the exhaust duct 20, and the suction air volume decreases as the length of the exhaust duct 20 increases. Less than the required suction air volume necessary for suction, dust left on the filter mesh 12 is left behind. In addition, the length of the exhaust duct 20 varies depending on the situation of the installation site of the air conditioner.

[0074] Therefore, when the installer sets the length of the exhaust duct 20 with the remote controller (not shown) during the construction of the air conditioner, the suction fan of the suction device 18 in the cleaning mode and the suction duct dust discharge mode is set. Change the rotation speed from S1 to S3 (for example, 5000rpm), and change the rotation speed of the suction fan in the exhaust duct dust mode from S2 to S4 (for example, 6000rpm).

[0075] As a result, the necessary suction air volume can always be ensured regardless of the construction status of the exhaust duct 20, and the cleaning performance of the filter net 12 can be maintained appropriately.

Note that, instead of the length of the exhaust duct 20, the number of rotations of the suction fan can be changed based on the number of times the exhaust duct 20 is bent.

Industrial applicability

[0077] As described above, the air conditioner according to the present invention can prevent uncollected dust adhering to the filter net of the indoor unit and can save the user from having to clean the filter completely. Therefore, it can be applied to various air conditioners. It is also convenient for air conditioners that are difficult to clean with filters that embed equipment in the ceiling or are stored behind the ceiling. For example, it is also applicable to products with filters and blower circuits such as air purifiers and car air conditioners. it can.

Claims

The scope of the claims

[1] An air conditioner having an indoor unit that houses a heat exchanger and a fan that blows out the air heat-exchanged by the heat exchanger into the room,

Consists of a filter mesh that removes dust from the air passing through the heat exchanger, a suction arch I nozzle that can be driven in the first direction along the filter mesh, and a suction device connected to the suction nozzle. The suction nozzle includes a nozzle body having an opening, and a suction hole that is driven in a second direction perpendicular to the first direction along the opening while covering the opening. A position detecting means for detecting the position of the suction hole in the second direction, and a cleaning ability of the suction nozzle according to the position of the suction hole detected by the position detection means. An air conditioner characterized in that it can be changed.

[2] The cleaning ability of the suction nozzle is changed by changing the number of times of suction of the suction nozzle in the first direction according to the position of the suction hole detected by the position detection means. The air conditioner according to claim 1, wherein the air conditioner is characterized.

3. The cleaning ability of the suction nozzle is changed by changing the suction amount of the suction nozzle according to the position of the suction hole detected by the position detection means. Air conditioner as described in.

[4] The cleaning ability of the suction nozzle is changed by changing the driving speed of the suction nozzle according to the position of the suction hole detected by the position detection means. Air conditioner as described in.

[5] Dust detection means for detecting the amount of dust adhering to the filter net is further provided so that the cleaning ability of the suction nozzle can be changed according to the amount of dust adhering detected by the dust detection means. The air conditioner according to claim 1, wherein

[6] The cleaning capability of the suction nozzle is changed by changing the arch I amount of the wick I nozzle according to the amount of dust attached detected by the dust detection means. The air conditioner according to claim 5.

[7] The cleaning capability of the suction nozzle is changed by changing the driving speed of the suction nozzle according to the amount of dust attached detected by the dust detection means. The air conditioner according to claim 5, wherein

[8] An air conditioner having an indoor unit that houses a heat exchanger and a fan that blows out the air heat-exchanged by the heat exchanger into the room,

Consists of a filter network that removes dust from the air passing through the heat exchanger, a suction arch I nozzle that can be driven in the first direction along the filter network, and a suction device connected to the suction nozzle The suction nozzle includes a nozzle body having an opening, and a suction hole that is driven in a second direction perpendicular to the first direction along the opening while covering the opening. The suction nozzle is moved back and forth in the first direction to clean the first part of the filter net, and then the suction hole is moved in the second direction to A cleaning mode is provided in which the suction nozzle is reciprocated in the first direction to clean a second portion different from the first portion of the filter mesh, and this is repeated to clean the entire surface of the filter mesh. An air conditioner characterized by that.

9. The air conditioner according to claim 8, wherein in the cleaning mode, the lower force of the filter net is also directed upward to sequentially clean the air.

10. The movement of the suction nozzle and the suction hole is stopped when the suction nozzle reaches the end in the first direction of the filter net in the cleaning mode. Air conditioner as described in.

11. The air conditioner according to any one of claims 8 to 10, wherein the fan is operated at a lower speed than in an air-conditioning operation in the cleaning mode.

12. The air conditioner according to any one of claims 8 to 11, wherein only a part of the filter net is cleaned to end the cleaning mode.

[13] The air conditioner according to claim 11 or 12, wherein at the end of the cleaning mode, the suction hole is moved to the next cleaning start position and the fan is returned to the air conditioning operation. .

[14] The filter device further includes a suction duct that connects the suction nozzle and the suction device, and further includes a suction duct dust discharge mode in which a suction air volume in the suction duct is increased as compared with a cleaning mode. The air conditioner according to any one of claims 8 to 13, wherein the air conditioner is characterized by the following.

[15] The filter device includes an outside of the exhaust pipe connected to the suction device, 15. The air conditioner according to claim 14, further comprising an exhaust duct dust exhaust mode in which the exhaust air volume of the exhaust duct is increased as compared with the suction duct dust exhaust mode.

16. The air conditioner according to claim 15, wherein the suction device includes a suction fan, and the number of rotations of the suction arch I fan in a cleaning mode is changed according to a length of the exhaust duct. Machine.

[17] The air according to claim 15 or 16, wherein the number of rotations of the suction fan in the suction duct dust mode or the exhaust duct dust mode is changed according to the length of the exhaust duct. Harmony machine.