WO2008062876A1

WO2008062876A1 - Air conditioning apparatus indoor unit

Info

Publication number: WO2008062876A1
Application number: PCT/JP2007/072679
Authority: WO
Inventors: Keiko Kanagawa; Koji Hirano; Kaku Okada
Original assignee: Toshiba Carrier Corporation
Priority date: 2006-11-24
Filing date: 2007-11-22
Publication date: 2008-05-29
Also published as: JPWO2008062876A1

Abstract

A fan cleaning apparatus (B) for cleaning dusts adhered on a fan (21) is arranged inside an indoor unit main body (1). The fan cleaning apparatus (B) is provided with a cleaning member (40), which is stored in a storing recessed section (30) formed by partially depressing a casing (23) of an air blowing path (24), provided with a brush section (42) at the leading end and is supported to the air blowing path (24) to be freely extended. A surface in contact with the air blowing path (24) is at a position recessed from a surface configuring the wind blowing path (24) of the casing (23) of the indoor unit main body (1), in a state where the cleaning member (40) is stored in the storing recessed section (30) and that a cover (50) is closed for the cleaning member (40).

Description

Specification

Air conditioner indoor unit

Technical field

[0001] The present invention relates to an indoor unit of an air conditioner having a cleaning function for a fan of an indoor fan.

Background art

[0002] An indoor unit of an air conditioner that is commonly used is called a so-called wall-mounted type, and is attached to a height of a wall surface of a room. An air filter is provided on the front side of the indoor heat exchanger housed in the main body, which is a housing, and filters indoor air sucked into the main body so that only clean air is guided to the indoor heat exchanger. ing.

[0003] The filtered dust accumulates on the surface of the air filter over a long period of use, and if left as it is, the amount of air flowing through the indoor heat exchanger decreases and the heat exchange efficiency of the indoor heat exchanger decreases. . In recent years, air conditioners equipped with an automatic air filter cleaning device that automatically removes dust adhering to the air filter have been provided.

[0004] In the main body, an indoor blower is housed together with an air filter and an indoor heat exchanger. This indoor blower is composed of a fan of the indoor blower and a motor that rotationally drives the fan. The above-mentioned indoor blower fan is likely to adhere to and accumulate fine dust contained in the air that has passed through the air filter and dust such as mold spores over a long period of time. Leading to an increase in

[0005] For this reason, a drying operation for removing moisture in the main body that causes mold generation, a sterilization operation for filling the inside with ozone to kill mold spores, and discharging dirty air and moisture to the outside An in-machine clean operation that performs an exhaust operation or the like is performed after completion of the air-conditioning operation. This is disclosed in Japanese Patent Application Laid-Open No. 2002-349891. Disclosure of the invention

[0006] By adopting the technology disclosed in the above Japanese Patent Laid-Open No. 2002-349891, after the air-conditioning operation is completed, an in-machine clean operation for drying and sterilizing the inside of the main body is performed, and an automatic cleaning of the air filter is performed. Therefore, it is possible to prevent mold generation and accumulation on the fan, maintain the inside of the main body in a clean state for a long period of time, and maintain a predetermined air conditioning capacity.

[0007] However, if the air conditioning operation is continued for a long period of time without performing the in-machine clean operation, if the sterilization in the main body becomes insufficient, the sterilization on the fan of the indoor blower is particularly insufficient. Become. For this reason, depending on the use conditions, mold may form on the fan surface and fine dust adheres to it, which may accumulate dust and reduce air conditioning capacity.

[0008] The present invention has been made based on the above circumstances, and the object of the present invention is to remove dust and the like adhering to and accumulating on the fan of the indoor air blower with a fan cleaning device, An air conditioner indoor unit that keeps air conditioning capacity over a long period of time while maintaining a cleaner condition and providing smooth air blowing despite the provision of a fan cleaning device in the air passage. Is.

[0009] In order to satisfy the above object, the indoor unit of the air conditioner of the present invention has an indoor heat exchanger and an indoor blower arranged in an air passage that communicates the air inlet and outlet of the indoor unit main body. The casing that constitutes a part of the air passage is equipped with a fan cleaning device that removes dust and the like adhering to the fan of the indoor fan, and the fan cleaning device is housed in a housing recess formed by forming a recess in the casing. A cleaning member that is provided with a brush portion at the tip and is supported so as to be extendable to the air passage, and that the surface in contact with the air passage is housed in the housing recess, from the surrounding surface constituting the air passage of the casing Is also in a recessed position.

[0010] In addition, in order to satisfy the above object, the indoor unit of the air conditioner of the present invention includes an indoor heat exchanger and an indoor blower disposed in a blower path that communicates the air inlet and the outlet of the indoor unit body. And a fan cleaning device that removes dust and the like adhering to the fan of the indoor fan in a casing that constitutes a part of the air passage, and the fan cleaning device is housed in a housing recess formed by forming a recess in the casing. A cleaning member that has a brush portion at its tip and is supported so as to extend freely in the air passage, and an openable / closable cover that covers the cleaning member in a state where the cleaning member is housed in the housing recess. The surface in contact with the passage is recessed more than the surrounding surface constituting the air passage of the casing in a state where the cleaning member is housed in the housing recess and the lid member closes the cleaning member.

Brief Description of Drawings FIG. 1 is a schematic cross-sectional view of an air conditioner indoor unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the main part showing a state in which the plate-like cleaning member and the lid are housed in the housing recess according to the embodiment.

FIG. 3 is a cross-sectional view of a main part showing a state in the middle of moving the plate-shaped cleaning member and the lid body from the storage recess to the operating position according to the same embodiment.

FIG. 4 is a cross-sectional view of a main part for explaining the operating posture of the plate-like cleaning member according to the embodiment.

FIG. 5 is a diagram for explaining the relationship between the brush of the fan cleaning device and the blade of the fan according to the embodiment.

[FIG. 6A] FIG. 6A is a simulation diagram showing pressure distributions based on different forms for the air passage of the fan cleaning device according to the embodiment.

FIG. 6B is a simulation diagram showing pressure distributions based on different forms with respect to the air passage of the fan cleaning device according to the embodiment.

[FIG. 6C] FIG. 6C is a simulation diagram showing pressure distributions based on different forms for the air flow path of the fan cleaning device according to the embodiment.

FIG. 7 is a schematic cross-sectional view showing the best mode for the air flow path of the fan cleaning device according to the embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

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

FIG. 1 is a schematic longitudinal sectional view relating to an indoor unit of an air conditioner. (In addition, a reference sign is added in the explanation, and it is! /, Parts are shown in the figure, and it is the same!)

The indoor unit body 1 is composed of a front panel 2 and a rear panel housing 3 that constitute a front housing, and is horizontally long in the width direction with respect to the vertical direction. Front suction port on part of front side of indoor unit body 1

4 is opened, and the movable panel 2A supported by the opening / closing drive mechanism is fitted in the front panel 2 facing the front suction port 4!

[0014] When the air conditioning operation is stopped as shown in FIG. 1, the movable panel 2A is joined to the surface of the front panel 2 and the front suction port 4 is closed. During air conditioning operation, the front suction port 4 It is controlled to open to the room. In the upper part of the indoor unit main body 1, an upper suction port 5 that is partitioned into a plurality of spaces by a crosspiece is provided.

[0015] A blower outlet 6 is opened in the lower front portion of the indoor unit body 1, and two blowout louvers 7a and 7b are provided in parallel at the blower outlet 6. The blowout louvers 7a, 7b take a rotating posture according to the type of air conditioning operation, set the direction of blowing heat exchange air, and close the air outlet 6 when the air conditioning operation is stopped.

[0016] In the indoor unit main body 1, an indoor heat exchanger 8 formed in a substantially inverted V shape by the front heat exchanger portion 8A and the rear heat exchanger portion 8B is disposed. The front heat exchanger section 8A is formed in a substantially parallel curved shape with a gap with the front panel 2, and faces the front suction port 4 and the upper suction port 5-. The rear heat exchanger portion 8B is formed in a straight shape, and is inclined obliquely to the upper suction port 5-portion.

A frame assembly 10 is provided between the front panel 2 and the indoor heat exchanger 8. A front air filter 11A and an upper air filter 11B that constitute the air filter 11 are interposed between the front suction port 4 and the upper suction port 5, and the front heat exchanger 8A and the rear heat exchanger 8B. Each is supported so as to be movable with respect to the frame assembly 10.

[0018] An air filter cleaning device A is disposed between the upper end of the front air filter 11A and the front end of the upper air filter 11B. The air filter cleaning device A removes dust adhering to the front air filter 11A while reciprocating the front air filter 11A to the upper surface side of the upper air filter 11B. Further, dust adhering to the front air filter 11A is removed while reciprocating the upper air filter 11B to the front side of the front air filter 11A.

[0019] An air cleaning unit 17 is mounted on the front side of the front heat exchanger 8A and on the back side of the front air filter 11A. The air cleaning unit 17 includes a pair of left and right electric dust collectors 18 and a dust collector power supply unit disposed on one electric dust collector side.

[0020] Each electric dust collector 18 includes a charge-side electrode that gives a charge to dust in the flowing air, and a dust-collection side electrode that captures the dust given the charge. Each electrode surface is coated with a deodorizing agent and has both a dust collecting function and a deodorizing function as an electrostatic precipitator. The electric dust collector 18 is an ozone generator having a function of generating ozone when indoor air is not guided. [0021] An indoor blower 20 is disposed between the front and rear heat exchanger portions 8A and 8B of the indoor heat exchanger 8 formed in an umbrella shape in a side view. The indoor blower 20 includes a fan motor disposed in a space on one side end of the indoor unit body 1 and a fan 21 having one support shaft coupled to a rotation shaft of the fan motor. In this embodiment, the fan 21

[0022] By driving the indoor blower 20, the indoor air is forwarded from the upper suction ports 4, 5 to the indoor unit main body.

1 is sucked into the front air filter 11A, 11B from the upper air filters 11A and 11B, and the air purification unit 17 and the indoor heat exchanger 8 are circulated. .

[0023] The lower end portion of the front heat exchanger portion 8A is placed on the front drain pan 22a, and the lower end portion of the rear heat exchanger portion 8B is placed on the rear drain pan 22b. The front and rear drain pans 22a and 22b receive drain water dripped from the respective heat exchanger sections 8A and 8B, and can drain to the outside through a drain hose (not shown).

[0024] The outer surfaces of the side walls of the front and rear drain pans 22a and 22b are provided close to the indoor blower 20, and these constitute a nose for the fan 21. A casing 23 is provided between the side wall portions of the front and rear drain pans 22a and 22b and the air outlet 6, and a space surrounded by the casing 23 defines a part of the air passage 24 that communicates the nose and the air outlet 6. Constitute.

A fan cleaning device B is attached to a casing 23 that extends from the fan 21 to the outlet 6 and forms a part of the air passage 24.

[0026] Fine dust or dust contained in the air that has passed through the air filter due to long-term use, or mold spores (hereinafter simply referred to as “dust etc.”) are generated in the fan 21 of the indoor blower 20. Adhere to. Fan cleaning device B removes dust from fan 21 and cleans it, changes the fan 21 force, the function of removing dust transferred to fan cleaning device B, and the direction of the airflow that is guided through the air passage 24 It has a function.

[0027] The configuration of the fan cleaning device B will be described. The fan cleaning device B is opposed to the inner surface side of the casing 23 constituting a part of the air passage 24 along the axial direction of the fan 21 with a predetermined depth and width dimension. A storage recess 30 is provided. The storage recess 30 has a plate thickness cleaning member 40 having a predetermined plate thickness and a width and length that can be stored in the storage recess 30, and the opening of the storage recess 30. It has the same shape area as the mouth, and is provided with an openable / closable lid 50 that covers the plate-like cleaning member 40.

[0028] One end of the plate-like cleaning member 40 is provided with a rotation fulcrum 41 on the most upstream side of the air passage 24, and the other end is rotatably supported as a free end. A brush part 42 is provided at the end which is a free end. The brush portion 42 has a thickness substantially the same as the thickness of the plate-like cleaning member 40, is provided over the entire length in the width direction, and is opposed along the axial direction of the fan 21.

[0029] The brush portion 42 is a soft material that contains one or more of an antifungal agent, an antibacterial agent, a lubricant, and an antistatic agent, or a plurality of them, or is applied to the surface. Furthermore, the surface of the brush portion 42 is subjected to metal thinning / metal deposition treatment to form a film! / And the wear resistance of the surface of the brush portion 42 is enhanced.

[0030] One end of the lid 50 is provided with a rotation fulcrum 51 on the most downstream side of the air passage 24, and the other end thereof is rotatably supported as a free end. The lid 50 is a complete flat plate, and any member is attached to the free end. The lid 50 is located on a surface facing the plate-like cleaning member 40 at a predetermined distance from the tip. A dust removal projection 52 is provided.

Accordingly, the brush portion 42 at the tip of the plate-like cleaning member 40 is provided facing the fan 21 in the axial direction, and the dust removal projection 52 is formed in a straight shape, so that the brush portion 42 It is provided facing the entire length. The plate-like cleaning member 40 and the lid 50 are connected to one common drive unit and are driven simultaneously.

FIG. 2 is a cross-sectional view of the main part showing a state where both the plate-like cleaning member 40 and the lid 50 are housed in the housing recess 30.

When the plate-like cleaning member 40 and the lid 50 are not used, both are stored in the storage recess 30. At this time, the plate-shaped cleaning member 40 is stored in the lower side, which is the bottom side of the storage recess 30, and is stored in a state where the lid 50 is overlaid on the plate-shaped cleaning member 40.

In more detail, the plate-like cleaning member 40 is placed directly on the bottom surface of the storage recess 30, the lid 50 covers the plate-like cleaning member 40 entirely, and the upper surface of the lid 50 is the casing 23. It is in a recessed position with respect to the surface constituting the air passage 24.

FIG. 3 shows a state where the plate-like cleaning member 40 is moving. At the same time, the lid 50 also operates. It is set to do.

In the state shown in FIG. 2, the lid 50 first rises with the rotation fulcrum 51 as a fulcrum and becomes almost upright, and then the plate-like cleaning member 40 uses the rotation fulcrum 41 as a fulcrum. Rotate. Since the lid 50 is almost upright, the rotation of the plate-like cleaning member 40 that has been on the lower side is smoothly performed without any trouble.

[0037] At this time, the brush portion 42 is in sliding contact with the dust removing projection 52 provided on the side surface of the lid 50 and passes therethrough. Since the brush portion 42 and the dust removal projection 52 are formed to have the same width in the width direction and are correctly opposed to each other, the brush portion 42 extends over the entire width of the dust removal projection 5.

It will be in sliding contact with 2.

FIG. 4 shows a state where the plate-like cleaning member 40 has reached the set portion and performs a cleaning action on the fan 21, and is also a partially enlarged view of FIG. 1 described above.

The plate-like cleaning member 40 continues to rotate from the position shown in FIG. 3, and stands up in an almost upright state as shown in FIG. At the next timing, the lid 50 falls from the standing state toward the plate-like cleaning member 40 and stops at a position where the tip abuts against the side of the plate-like cleaning member 40. Since the fan 21 is rotationally driven in the clockwise direction, the lid 50 comes into contact with the plate-like cleaning member 40 from the counter-rotating direction of the fan 21.

FIG. 5 is a view for explaining the relationship between the fan 21 and the plate-like cleaning member 40.

[0041] The plate-like cleaning member 40 protrudes into the air passage 24 and is erected so that the brush portion 42 contacts the fan 21 at an angle. The angle of the brush part 42 of the plate-like cleaning member 40 with respect to the fan circumferential tangent line that contacts the blade 27 of the fan 21 is J. If the angle formed is G (<90 °), G ≤ J ≤ G + 90 °.

[0042] The thickness dimension W1 of the brush portion 42 of the plate-like cleaning member 40 is formed smaller than the distance dimension W2 between the blades 27 constituting the fan 21 (Wl <W2).

On the other hand, an exhaust device is provided on one side of the indoor heat exchanger 8. This exhaust device is provided adjacent to the side of the fan 21 constituting the indoor blower 20, and has an axial center on the extension of the axial center of the fan 21. The exhaust system has a function to discharge dust removed by the air filter cleaning device A and the fan cleaning device B to the outside of the room. [0044] An air conditioner indoor unit configured as described above, and when the operation switch of the remote control is switched on, the movable panel 2A opens the front inlet 4 and is provided in the outlet 6 The wind direction posture of the louvers 7a and 7b is set. At the same time, the indoor blower 20 performs air blowing, while the outdoor unit compressor is driven to start the refrigeration cycle operation.

The room air is sucked into the indoor unit body 1 from the front suction port 4 and the upper suction port 5. Then, it passes through the front air filter 11A and the upper air filter 11B, and dust contained in the room air is captured. Further, finer dust is captured through the air cleaning unit 17 and is guided to the indoor heat exchanger 8 to perform heat exchange.

[0046] The air after the heat exchange is guided through the fan 21 along the casing 23 that forms the blow-out air passage 24, and is guided from the blow-out port 6 to the blow-out louvers 7a and 7b. Is done. At this time, the plate-like cleaning member 40 constituting the fan cleaning device B and the lid body 50 having the airflow changing function are housed in the housing recess 30 as shown in FIG.

[0047] In particular, the lid 50 that is above the plate-like cleaning member 40 and covers the entire surface thereof is in a recessed position with respect to the surface that forms the air passage 24 with the casing 23, and the casing 23 of the air passage 24 Since it is lower than the peripheral surface of the surface, it does not obstruct the flow of heat exchange air that is guided to the air passage 24.

That is, the turbulent air flow is generated and the air flow of the heat exchange air is guided from the fan 21 along the casing 23 that forms the air blowing path 24 on the blowing side, and blown from the air outlet 6. It is arranged at a position that is not easily affected by the suction action drawn by the flow velocity.

[0049] If air conditioning operation is continued for a long period of time, dust trapped from room air inevitably accumulates on the front air filter 11A and the upper air filter 11B, and the front air filter 11A, 11B and the air cleaner Even in the unit 17, the dust that has not been captured passes through the indoor heat exchanger 8 and adheres to the fan 21 that constitutes the indoor blower 20.

[0050] Therefore, the control unit sends an operation start signal to the air filter cleaning device A and the fan cleaning device B that perform the in-machine clean operation after a predetermined cumulative air conditioning operation time has elapsed. Alternatively, it may be set so that the operation start signal can be sent from the control unit to each of the cleaning devices A and B by arbitrarily pressing the cleaning switch of the remote controller. [0051] The control unit sends a signal to the driving unit of the movable panel 2A to close the front suction port 4, and sends a signal to the driving unit of the blowing louvers 7a and 7b to close the blowing port 6. By making the indoor unit body 1 into a substantially sealed structure in advance, the collected dust is prevented from leaking as much as possible.

[0052] An operation start signal is sent to the air filter cleaning device A at the timing after completion of the closing. In the air filter cleaning device A, dust adhering to the front air filter 11A and the upper air filter 11B is removed. The dust dusted off is received by the air filter cleaning device A and then discharged to the outdoors.

On the other hand, in fan cleaning device B, the non-operating state shown in FIG. 2 temporarily changes to the state shown in FIG. Further, the plate-like cleaning member 40 is erected and the lid 50 is rotated in the storage direction in the storage recess 30. At this time, the brush portion 42 at the tip of the plate-like cleaning member 40 is in sliding contact with the dust removal projection 52 provided on the lid 50. Therefore, even if dust remains on the brush portion 42, the dust removing projection 52 removes the dust.

Finally, as shown in FIG. 1 and FIG. 4, the plate-like cleaning member 40 is erected to bring the tip of the brush portion 42 into contact with the blade 27 of the fan 21. The lid 50 is in an oblique posture so that the tip contacts the side of the plate-like cleaning member 40. Then, the fan 21 is controlled to rotate at a predetermined rotational speed.

As the fan 21 rotates, the bristles of the brush portion 42 come into sliding contact with each other, and dust attached to the blades 27 of the fan 21 is removed. At this time, since the above-mentioned (G≤J≤G + 90 °, W1 <W2) is set, the tip of the brush part 42 can easily enter the inside of the blade 27 tip of the fan 21 and the inside of the tip of the blade 27 Dust can be removed with certainty.

The fan 21 is driven to rotate in the clockwise direction, and the lid 50 supports the plate-like cleaning member 40. While the brush portion 42 removes dust adhering to the blade 27, the plate-like cleaning member 40 receives a biasing force in the rotational direction of the fan 21 and tries to fall down. The lid 50 is supported from the side opposite to the rotational direction. Therefore, the dust removal that does not fall down can be continued without any trouble.

At the same time, the exhaust device operates to suck the secondary air flowing out from the indoor heat exchanger 8 and the dust blown off from the fan 21 and discharge it to the outdoors. In addition, after closing the blowout port 6 with the blowout louvers 7a and 7b, the fan 21 is rotated at a low speed, and the lid 50 is connected to the plate-like cleaning member 40. Both project into the air passage 24 formed by the casing 23.

Therefore, particularly as shown in FIG. 1, the lid 50 and the plate-shaped cleaning member 40 act as a pseudo nose, and the airflow is the secondary of the fan 21 and the indoor heat exchanger 8 around the fan 21. Forms a circulating flow R that circulates on the side. The circulating flow R is finally sucked into the exhaust device as the secondary air of the indoor heat exchanger 8 and exhausted outdoors.

[0059] After the fan cleaning device B is operated for a predetermined time, the plate-like cleaning member 40 and the lid 50 are again illustrated.

As shown in FIG. Even in the middle of this, the brush portion 42 at the tip of the plate-like cleaning member 40 is in sliding contact with the dust removal projection 52 of the lid 50. Therefore, the dust transferred from the fan 21 to the brush portion 42 is swept away by the dust removing projection 52 and discharged outside through the exhaust device.

[0060] In this way, the fan 21 has the airflow force including dust blown off from the fan 21 and dust removed from the brush portion 42 of the plate-like cleaning member 40 by the dust removing projection 52. Everything is discharged to the outside without scattering to the surroundings or adhering to each component to keep the interior of the indoor unit body 1 clean.

[0061] Note that the fan cleaning device B is provided in a casing 23 that forms part of the air passage 24 from the fan 21 to the blower outlet 6, and has a plate-like cleaning with the lid 50 that is the fan cleaning device B. Member 4

0 is located along the air passage 24.

Therefore, even when the fan cleaning device B is not in operation, it is inevitable that the device B has a certain influence on the airflow guided through the air passage 24. Therefore, a simulation was made of the effect of the fan cleaning device B on the airflow guided through the air passage 24 due to the difference in form when the fan cleaning device B is not operating.

FIG. 6A is a simulation diagram showing the pressure distribution when the fan cleaning device B1 protrudes into the air passage 24 from the casing 23 force that forms the air passage 24 in a non-operating state. The line in the figure is the isobaric line of pressure (negative pressure). (same as below)

The air flow guided to the air passage 24 is the air flow sent from the fan 21 to the outlet 6 side, that is, the jet, and the fan cleaning device B1 is installed in the casing 23 of the air passage 24 that hits the outer periphery of the jet. Has been.

[0064] The flow of air guided along the surface of the casing 23 constitutes the fan cleaning device B1. It has been found that the phenomenon that the flow is disturbed by the protruding step portion formed around the lid 50, turbulence is generated, and the pressure difference with the jet portion becomes relatively large is observed.

[0065] This increases the negative pressure state of the pressure on the surface of the casing 23 in which the fan cleaning device B1 of the air passage 24 is installed. For this reason, the lid 50 of the fan cleaning device B1 is moved to the air passage 24 side. Pulled phenomenon occurs.

[0066] Therefore, the lid 50 of the fan cleaning device B1 is lifted up, disturbing the air flow, and reducing air conditioning efficiency. That is, there is a problem that it is necessary to make the lid 50 strong so that the lid 50 does not float. Therefore, the configuration in which the fan cleaning device B1 protrudes into the air passage 24 cannot be adopted.

FIG. 6B is a simulation diagram showing the pressure distribution when the fan cleaning device B2 is flush with the surface of the casing 23 forming the air passage 24 in the non-operating state (same plane).

[0068] With respect to the flow of air sent from the fan 21 to the air outlet 6 side, that is, the flow of wind on the jet flow side, the pressure distribution in the portion near the casing 23 portion of the air passage 24 that hits the outer periphery of the jet flow is relatively disturbed. There is no. Furthermore, the negative pressure drawn by the jet tends to be less affected (the negative pressure value decreases) as it goes down the casing 23 surface.

[0069] For this reason, the phenomenon that the lid 50 of the fan cleaning device B1 located on the surface of the casing 23 is pulled toward the air passage 24 is compared to the case where the fan cleaning device B1 protrudes into the air passage 24. It is mitigating.

[0070] However, since there is a phenomenon in which the lid 50 is pulled into the air passage 24, a means for holding the lid 50 so that the lid 50 does not open during normal operation is necessary.

FIG. 6C is a simulation diagram showing a pressure distribution when the fan cleaning device B3 is recessed and formed one step down from the surface of the casing 23 that forms the air passage 24 in a non-operating state. FIG. 7 is a cross-sectional view of the actual fan cleaning device B3.

[0072] With such a configuration, the air flow that protrudes from the fan 21 and is sent to the blowout side, that is, the wind flow on the jet side, on the casing 23 portion of the air passage 24 that hits the outer periphery of the jet flow The pressure distribution in the near! / Part is a value in which the negative pressure value drawn by the turbulent jet is also reduced compared to the case 23 that is flush with the casing 23 surface (same plane) as in the fan cleaning device B2 above. Is shown. Therefore, the lid can be easily held in the closed state, and the air blowing operation during the normal air-conditioning operation can be performed smoothly, and the reliability can be improved.

[0074] Then, from the configuration shown in Fig. 6C, the actual size of the fan cleaning device B3 to be recessed from the casing 23 as shown in Fig. 7 was varied and the simulation was performed again.

[0075] As a result, it is best that the surface of the lid 50 of the fan cleaning device B3 is best if the depth is about 1 to 5 mm deeper than the inner surface forming the air passage of the casing 23. I got it. With such a size, a sufficient piping storage space is secured without affecting the piping storage space formed on the back side of the casing 23 of the fan cleaning device B3.

It should be noted that the present invention is not limited to the above-described embodiments as they are, but can be embodied by modifying the constituent elements without departing from the spirit of the invention in the implementation stage. For example, the fan cleaning device B 3 housed in the housing recess 30 formed by recessing a part of the casing 23 is cleaned with the cleaning member 40 supported so as to extend freely in the air passage 24 described above, and the cleaning thereof. What is comprised only with the cleaning member 40 supported so that extension to the ventilation path 24 is not included with what was comprised with the cover body 50 which covers the member 40. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

Industrial applicability

[0077] According to the present invention, the fan cleaning device holds the fan of the indoor blower in a clean state, and the fan cleaning device is smoothly pulled without being pulled by the blown air to the blower passage side or disturbed by the blown air. Air can be blown and the air-conditioning capacity is maintained for a long time.

Claims

The scope of the claims

[1] In an indoor unit of an air conditioner in which an indoor heat exchanger and an indoor fan are arranged in an air passage that communicates an air inlet and an air outlet of the indoor unit body,

A casing that forms a part of the air passage includes a fan cleaning device that removes dust and the like attached to the fan of the indoor fan,

The fan cleaning device is

A part of the casing is housed in a recessed part for storage, a brush part is provided at the tip, a cleaning member that is supported so as to extend freely in the air passage, and a surface in contact with the air passage is for storage. An indoor unit of an air conditioner, wherein the indoor unit is in a recessed position with respect to a peripheral surface constituting the air passage of the casing in a state of being accommodated in the concave portion.

[2] In an indoor unit of an air conditioner in which an indoor heat exchanger and an indoor fan are arranged in an air passage that communicates an air inlet and an outlet of the indoor unit body,

The fan cleaning device is

A cleaning member that is housed in a housing recess formed by forming a part of the casing, has a brush portion at the tip, and is supported so as to extend freely in the air passage, and the cleaning member serves as the housing recess. In the accommodated state, with an openable / closable lid that covers the cleaning member,

The surface in contact with the air passage is in a recessed position with respect to the surrounding surface constituting the air passage of the casing in a state where the cleaning member is accommodated in the recess for storage and the cover member closes the cleaning member. Air conditioner indoor unit.

[3] The fan cleaning device according to claim 1, wherein a surface in contact with the air passage is in a recessed position having a depth of 1 to 5 mm from a surrounding surface constituting the air passage of the casing. An indoor unit for an air conditioner according to any one of claims 1 to 3.

[4] The lid of the fan cleaning device causes the brush portion at the tip of the cleaning member to slidably contact the fan of the indoor blower when the cleaning member rotates with the lid open. The indoor unit of an air conditioner according to claim 2, further comprising a dust removal projection for removing dust and the like transferred to the brush portion. The brush portion at the tip of the cleaning member is provided to face along the axial direction of the fan of the indoor blower,

5. The indoor unit of an air conditioner according to claim 4, wherein the dust removing projection is formed in a straight shape and is provided so as to face the entire length of the brush portion.