JP5223975B2 - Air conditioning indoor unit - Google Patents

Description

  The present invention relates to an air conditioning indoor unit.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-116346) discloses an air conditioning indoor unit having an upper suction port on the front upper surface and upper surface of the main body and a lower suction port on the bottom surface of the main body. A flap is attached to the upper suction port, and an opening / closing plate is rotatably attached to the lower suction port. In addition, an air purifying unit is attached to the ventilation path of the air sucked from the lower suction port. According to Patent Document 1, the opening / closing plate fully opens the lower suction port during normal operation, and closes the lower suction port as necessary when the operation is stopped or maintenance such as cleaning of the electric dust collector is performed. .

  In a general air conditioning indoor unit, the air inlet is located above the air outlet. For example, during cooling, the air after air conditioning is blown horizontally or slightly diagonally upward from the air outlet, and located above the air outlet. Since air in the air-conditioning target space is sucked from the suction port, the air stagnation occurs in the air-conditioning target space.

  On the other hand, in the air conditioning indoor unit disclosed in Patent Document 1, the lower suction port is adjacent to the rear of the air outlet, and air is sucked from the lower air inlet arranged behind the air outlet during cooling. Therefore, generation of air stagnation can be suppressed.

  On the other hand, there is a high possibility that the conditioned air blown out from the air outlet is directly sucked into the lower air inlet, that is, a so-called short circuit, and the short circuit must be avoided because it causes a decrease in performance.

  The subject of this invention is providing the air-conditioning indoor unit which prevents generation | occurrence | production of a short circuit in the air-conditioning indoor unit provided with the suction inlet adjacent behind the blower outlet.

An air conditioning indoor unit according to a first aspect of the present invention is a wall-hanging air conditioning indoor unit, and includes a main body casing, an opening / closing member, and a drive mechanism. Body casing has a lower suction port located in outlet and the wall side of the air outlet at the bottom, it leads into the interior of the air from the lower inlet along the back. The opening / closing member opens and closes the lower suction port. The drive mechanism moves the opening / closing member. Moreover, the opening and closing member when the lower inlet Open, to block the flow of air toward the lower suction port from the air outlet, the air outlet side end portion of the closing member is moved to the outlet side. The open position of the opening / closing member includes a position where there is substantially no gap between the outer end of the partition wall that partitions the air outlet and the lower suction port. At a position where there is substantially no gap between the opening and closing members, the end of the opening and closing member closest to the lower suction port and the outer end of the partition wall are close to each other.

  In this air conditioning indoor unit, since the opening / closing member exists on the air passage that is going to flow directly from the outlet to the lower suction port, the air flow is deflected away from the lower suction port by the opening / closing member. As a result, the occurrence of a short circuit is suppressed. In addition, among the routes from the blower outlet to the lower suction port, the route in which the blown air is most easily sucked is a route that flows to the lower suction port beyond the outer end of the partition wall that partitions the blower outlet and the lower suction port. By preventing a gap from the outer end of the partition wall, the blown air is suppressed from being sucked into the lower suction port.

An air conditioning indoor unit according to a second aspect of the present invention is the air conditioning indoor unit according to the first aspect, and further includes a flap and a flap drive mechanism. A flap adjusts the blowing angle of the air which blows off from a blower outlet. The flap drive mechanism drives the flap. The open position of the opening / closing member includes a position where there is substantially no gap with the flap.

  In this air conditioning indoor unit, while air is being blown out from the air outlet, air may be sucked into the lower suction port from the gap between the flap and the air outlet periphery, so the air going from the gap to the lower air inlet By moving the opening / closing member on the passage and blocking the passage, the blown air is suppressed from being sucked into the lower suction port.

An air conditioner indoor unit according to a third aspect of the present invention is the air conditioner indoor unit according to the second aspect , and at the position where there is substantially no gap between the opening and closing members, the outer end of the partition wall that partitions the air outlet and the lower suction port And one end of the opening / closing member are close to each other, and the edge of the flap is close to the other end of the opening / closing member.

  In this air conditioning indoor unit, while air is blown out from the air outlet, there is a gap between the edge of the flap and the outer end of the partition wall, and there is a possibility that air will be sucked into the lower air inlet from there. By moving the opening / closing member to a position that closes the gap, the blown air is suppressed from being sucked into the lower suction port.

The air conditioner indoor unit according to the fourth aspect of the present invention is the air conditioner indoor unit according to the first aspect , wherein the air blowing angle from the air outlet is adjusted when the opening / closing member opens the lower suction port. In this air conditioning indoor unit, when the lower suction port is opened, the blowing angle is adjusted so that air is blown away from the lower suction port, so that a short circuit is suppressed.

  In the air conditioning indoor unit pertaining to the first aspect of the present invention, since the open / close member exists on the air passage that is about to flow directly from the blowout port to the suction port, the air flow is deflected by the open / close member. As a result, the occurrence of a short circuit is suppressed. In addition, among the routes from the blower outlet to the lower suction port, the route in which the blown air is most easily sucked is a route that flows to the lower suction port beyond the outer end of the partition wall that partitions the blower outlet and the lower suction port. By preventing a gap from the outer end of the partition wall, the blown air is suppressed from being sucked into the lower suction port.

In the air conditioning indoor unit according to the second aspect of the present invention, air may be sucked into the lower suction port from the gap between the flap and the blower outlet periphery while air is blown from the blower outlet. By moving the opening / closing member over the air passage from the first to the lower suction port to block the passage, the blown air is suppressed from being sucked into the lower suction port.

In the air conditioning indoor unit pertaining to the third aspect of the present invention, there is a gap between the edge of the flap and the outer end of the partition wall while air is being blown out from the outlet, so that air is sucked into the lower inlet from there. There is a possibility of being swallowed. By moving the opening / closing member to a position that closes the gap, the blown air is suppressed from being sucked into the lower suction port.

In the air conditioning indoor unit pertaining to the fourth aspect of the present invention, when the lower suction port is opened, the blowing angle is adjusted so that air is blown away from the lower suction port, so that short circuits are suppressed. .

Sectional drawing of the air-conditioning indoor unit which concerns on one Embodiment of this invention. The expanded side view of the blower outlet and 1st inlet port of FIG. The expanded side view of the 2nd suction inlet of FIG. Sectional drawing of the air-conditioning indoor unit in driving | operation. The side view of the opening-and-closing plate periphery stopped at each open position. Sectional drawing of the air-conditioning indoor unit which concerns on a 1st modification. Sectional drawing of the air-conditioning indoor unit which concerns on a 2nd modification. Sectional drawing of the 1st suction port periphery of the closed air-conditioning indoor unit which concerns on a 3rd modification. Sectional drawing of the 1st suction inlet periphery of the air-conditioning indoor unit concerning a 3rd modification opened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of Air Conditioning Indoor Unit FIG. 1 is a cross-sectional view of an air conditioning indoor unit according to an embodiment of the present invention. In FIG. 1, the air conditioning indoor unit 2 is a wall-mounted type, on which a main body casing 11, an indoor heat exchanger 13, an indoor fan 15, a bottom frame 17, a filter 25, and a control unit 41 are mounted.

  The main body casing 11 forms a three-dimensional space by the front grill 11a, the front panel 11b, and the back plate 11c, and the indoor heat exchanger 13, the indoor fan 15, the bottom frame 17, the filter 25, and the control unit 41 are formed in the three-dimensional space. It is settled. The front panel 11b covers the front surface of the front grill 11a, and an upper end of the front panel 11b is rotatably supported by the front grill 11a and can operate in a hinged manner. Moreover, the main body casing 11 is attached to the wall via the mounting plate 11d.

  The indoor heat exchanger 13 and the indoor fan 15 are attached to the bottom frame 17. The indoor heat exchanger 13 exchanges heat with the passing air. In addition, the indoor heat exchanger 13 has an inverted V shape in which both ends are bent downward in a side view, and the indoor fan 15 is positioned below the indoor heat exchanger 13. The indoor fan 15 is a cross-flow fan, blows air taken in from the room against the indoor heat exchanger 13 and then blows it into the room.

  An air outlet 19 is provided on the lower surface of the main casing 11. A flap 291 for guiding the air blown out from the air outlet 19 is rotatably attached to the air outlet 19. The flap 291 is driven by a motor (not shown) and can open and close the air outlet 19 as well as change the air blowing direction. The air outlet 19 is connected to the inside of the main body casing 11 by the air outlet passage 18, and the air outlet passage 18 is formed along the bottom frame 17 from the air outlet 19.

  Further, a first suction port 21 is provided on the lower surface of the main casing 11 on the wall side with respect to the air outlet 19. The first suction port 21 is connected to the inside of the main casing 11 by the suction channel 16, and the suction channel 16 is formed from the first suction port 21 along the bottom frame 17. That is, the suction channel 16 is adjacent to the blowout channel 18 with the bottom frame 17 interposed therebetween.

  The indoor air in the vicinity of the first suction port 21 is sucked into the indoor fan 15 via the first suction port 21, the suction flow path 16, the filter 25 and the indoor heat exchanger 13 by the operation of the indoor fan 15, and blown out from the indoor fan 15. It blows out from the blower outlet 19 through the flow path 18.

  A filter 25 is disposed between the front grill 11 a of the main casing 11 and the indoor heat exchanger 13. The filter 25 removes dust contained in the air that flows in toward the indoor heat exchanger 13.

  A second suction port 22 is provided in the front upper portion of the front grill 11 a of the main body casing 11. The indoor air in the vicinity of the second suction port 22 is sucked into the indoor fan 15 through the second suction port 22, the filter 25 and the indoor heat exchanger 13 by the operation of the indoor fan 15, and passes through the blowout flow path 18 from the indoor fan 15. It blows out from the blower outlet 19.

  The control unit 41 is housed in the front portion of the main body casing 11, controls the rotational speed of the indoor fan 15, adjusts the opening degree of the air outlet 19, adjusts the opening degree of the first suction port 21, and opens the second suction port 22. Command to adjust the degree.

(2) Detailed configuration (2-1) Air outlet 19 and air outlet opening / closing mechanism 29
FIG. 2 is an enlarged side view of the air outlet and the first suction port illustrated in FIG. 1. In FIG. 2, the air outlet 19 is opened and closed by an air outlet opening / closing mechanism 29. The outlet opening / closing mechanism 29 includes a flap 291, a support shaft 292, and a flap drive motor 293.

  The flap 291 is an arc-shaped plate that is curved so that its cross-sectional shape protrudes to the outside of the air outlet 19, and one end in the width direction is close to the lower end of the bottom frame 17. The flap 291 is rotatable.

  The support shaft 292 is a shaft for the flap 291 to rotate, and is supported by the side wall of the main body casing 11 that intersects the virtual center axis of rotation.

  The flap drive motor 293 is a stepping motor with a built-in stepping motor or a reduction gear mechanism, and its rotation shaft is connected to a support shaft 292. When the state where the flap 291 is housed in the air outlet 19 is set as the origin position, the flap drive motor 293 rotates the rotating shaft according to the number of pulses applied, and the flap 291 rotates in the direction to open the air outlet 19.

(2-2) First suction port 21
The first suction port 21 is located between the lower end of the bottom frame 17 and the lower end of the back plate 11c. As shown in FIG. 1, the first suction port 21 is a part of the inlet of the suction flow channel 16 and is an opening having a predetermined width from the lower end of the back plate 11 c toward the lower end of the bottom frame 17.

  Of the inlet of the suction channel 16, a space between the first suction port 21 and the lower end of the bottom frame 17 is covered with a shielding plate 33. This is because the suction flow channel 16 and the blow flow channel 18 are adjacent to each other with the bottom frame 17 therebetween, and a part of the blown air passes through the lower end of the bottom frame 17 to the inlet of the suction flow channel 16. This is to prevent the possibility of entering. By arranging the shielding plate 33, the substantial inlet of the suction channel 16 can be moved away to the first suction port 21.

(2-3) First suction opening / closing mechanism 31
A first inlet opening / closing mechanism 31 is installed in the first inlet 21. The first inlet opening / closing mechanism 31 includes an opening / closing plate 311, a hinge 312, a link 313, and a drive motor 314.

  The opening / closing plate 311 has a size that can be fitted into the opening of the first suction port 21 to block the first suction port 21. The opening / closing plate 311 is rotatable, and the virtual central axis of the rotation is located in the vicinity of the corner between the bottom frame 17 and the shielding plate 33.

  The hinge 312 is a fulcrum for the opening / closing plate 311 to rotate, and is provided on the wall of the main casing 11 that intersects the virtual center axis of the rotation. The hinge 312 and the opening / closing plate 311 are connected by a link 313.

  In order not to interfere with the shielding plate 33 when the link 313 rotates together with the opening / closing plate 311, a relief portion (not shown) such as a slit is formed on the shielding plate 33 side along the trajectory through which the link 313 passes. .

  The drive motor 314 is a stepping motor or a stepping motor with a built-in reduction gear mechanism, and its rotation shaft is coupled to the hinge 312. When the opening / closing plate 311 is in the first suction port 21 as the origin position, the drive motor 314 rotates the rotating shaft according to the number of applied pulses, and the opening / closing plate 311 opens the first suction port 21. Rotate in the direction.

(2-4) Second suction port 22 and second suction port opening / closing mechanism 32
FIG. 3 is an enlarged side view of the second suction port illustrated in FIG. 1. In FIG. 3, the second suction port 22 is provided from the position facing the upper end of the front panel 11 b in the front grill 11 a to the center of the top surface. The second suction port 22 is opened and closed by a second suction port opening / closing mechanism 32. The second suction opening / closing mechanism 32 includes a slide opening / closing plate 322, a pinion gear 324, a pinion drive motor 325, and a guide 326.

  The slide opening / closing plate 322 is a bendable resin plate, and rack gears 323 are formed at both ends of the surface facing the filter 25 (see FIG. 1). A pinion gear 324 that meshes with the rack gear 323 is disposed below the slide opening / closing plate 322. The pinion gear 324 is rotatably supported on the side wall of the main body casing 11.

  The pinion drive motor 325 is a stepping motor with a built-in stepping motor or a reduction gear mechanism, and its rotation shaft is connected to the central axis of the pinion gear 324. When the position where the slide opening / closing plate 322 closes the second suction port 22 is the origin position, the pinion drive motor 325 rotates the rotation shaft in accordance with the number of applied pulses and opens the second suction port 22. The slide opening / closing plate 322 is slid and moved.

  A guide 326 is provided on the side wall of the main body casing 11 to form a track when the slide opening / closing plate 322 slides. In FIG. 3, the guide 326 is drawn with a two-dot chain line so that the slide opening / closing plate 322 and the guide 326 can be distinguished.

(3) Operation FIG. 4 is a cross-sectional view of the air conditioning indoor unit during operation. In FIG. 4, the 1st suction inlet 21 and the 2nd suction inlet 22 are an open state. In the air conditioning indoor unit according to the present embodiment, since a cross flow fan is adopted as the indoor fan 15, the air flow from the second suction port 22 to the air outlet 19 is the main flow, and the first suction Even if only the mouth 21 is opened, air is hardly sucked. Therefore, when the first suction port 21 is opened, it is a premise that the second suction port 22 is opened.

(3-1) Opening / Closing Operation of First Suction Port 21 by Opening / Closing Plate 311 As shown in FIG. 4, when the first suction port 21 is in a predetermined open position, one end of the opening / closing plate 311 is close to the lower end of the bottom frame 17. The opening / closing plate 311 is on the extended surface of the wall of the bottom frame 17. Here, for convenience of explanation, the position of the opening / closing plate 311 shown in FIG. 1 is called a closed position, and the opening position of the opening / closing plate 311 shown in FIG. 4 is called an A position.

  The wall surface of the bottom frame 17 is a curved surface that gradually deflects the conditioned air (hereinafter referred to as conditioned air) emitted from the indoor fan 15 forward to the lower part. It proceeds along the wall surface of the bottom frame 17.

  The blowing direction of the conditioned air that has reached the air outlet 19 is varied in the vertical direction by the flap 291, and specifically, is varied in the range from the vertically lower side of the air outlet 19 to the horizontal front of the air outlet 19. However, the conditioned air whose blowing direction is actually controlled is conditioned air passing through the concave side of the flap 291, and the conditioned air passing through the convex side is blown out along the curved surface of the bottom frame 17. Therefore, when the air volume of the conditioned air to be blown out is small and there is no momentum, there is a possibility that the air is directly sucked into the rear first suction port 21.

  However, one end of the opening / closing plate 311 is so close to the lower end of the bottom frame 17 that there is substantially no gap, and the opening / closing plate 311 is on an extension surface of the wall surface of the bottom frame 17 or a surface parallel to the extension surface. Since it takes the form as described above, even if the air volume of the conditioned air blown out is small and has no momentum, the conditioned air travels forward along the opening / closing plate 311 to the lower part.

  As described above, the opening / closing plate 311 is a phenomenon in which the conditioned air is directly sucked into the first suction port 21 while controlling the direction of the conditioned air blown from the outlet 19 at the A position (so-called short circuit). Suppress.

(3-2) Opening Adjustment of First Suction Port 21 by Opening / Closing Plate 311 The opening position of the opening / closing plate 311 is not limited to the A position (open position shown in FIG. 4), but from the first suction port 21. It is also possible to stand still in an open position that limits the amount of suction.

  FIG. 5 is a side view of the periphery of the opening / closing plate stopped at each open position. In FIG. 5, the opening / closing plate 311 can be stopped at any position between the closed position and the A position. For convenience of explanation, an open position where the opening / closing plate 311 is rotated 60 ° clockwise from the closed position is a B position, and an open position where the open / close plate 311 is rotated 30 ° clockwise from the closed position is a C position. In the C position, the air sucked from the first suction port 21 is more restricted than in the B position.

(3-2-1) Adjusting the opening degree of the first suction port 21 during cooling operation Conventionally, in an air conditioning indoor unit, air after air conditioning is blown horizontally or slightly obliquely upward from the outlet during cooling operation, and the outlet Since air in the air-conditioning target space is sucked in through the suction port located above, air stagnation is likely to occur in the air-conditioning target space.

  On the other hand, the ideal air flow that prevents air stagnation is that the conditioned air blown horizontally or slightly diagonally upward from the air outlet 19 convects along the ceiling, walls, floors, and walls of the air-conditioning target space. Although it is a flow that is sucked from one suction port 21 (hereinafter referred to as an ideal flow), it has not been realized in the past because of concern about a short circuit.

  However, during the cooling operation, if the difference (Ts−Tr) between the set temperature Ts and the temperature Tr of the air-conditioning target space exceeds a predetermined value, the air volume of the blown air becomes large, and the momentum of the conditioned air that has exited from the outlet 19 is increased. Since the suction force of the first suction port 21 is exceeded, a short circuit is unlikely to occur. Therefore, when Ts−Tr is equal to or greater than a predetermined value, the ideal flow of conditioned air is adjusted while moving the opening / closing plate 311 to the B position or the C position and adjusting the opening of the first suction port 21. Can be realized.

  In the air conditioning indoor unit of this embodiment, when the difference between the set temperature Ts and the temperature Tr of the air conditioning target space is less than a predetermined value, the blown air is downward and the air volume is small, and a short circuit is likely to occur. 311 becomes a closed position and the 1st inlet 21 is closed.

(3-2-2) Opening adjustment of first suction port 21 during heating operation Normally, during heating operation, heated air-conditioned air is blown downward, and convection is performed along the floor, wall, and ceiling of the air-conditioning target space. However, it is a flow that is sucked from the front upper suction port. In the present embodiment, since the second suction port 22 corresponds to the conventional front upper suction port, the flow of conventional conditioned air can be realized with the first suction port 21 closed.

  Further, when the conditioned air is blown downward, opening the first suction port 21 causes a short circuit, so it is preferable to keep the first suction port 21 closed.

  However, when it is desired to increase the heating capacity, if a sufficient amount of intake air cannot be obtained with the second intake port 22 alone, it is necessary to adjust the opening of the first intake port 21 to increase the intake air amount. .

  At this time, when the difference (Ts−Tr) between the set temperature Ts and the temperature Tr of the air-conditioning target space is equal to or greater than a predetermined value, the air volume of the blown air increases, and the momentum of the conditioned air that has exited from the blowout port 19 is the first. Since the suction force from the suction port 21 is exceeded, a short circuit is unlikely to occur.

  Therefore, when Ts-Tr is equal to or greater than a predetermined value, the opening / closing plate 311 is moved to the B position or the C position, the opening degree of the first suction port 21 is adjusted, and the heating capacity can be increased. .

(3-2-3) Adjusting the opening degree of the first suction port 21 according to the blowing angle In addition, the control unit 41 can adjust the opening degree of the first suction port 21 according to the blowing angle. For example, since the 1st inlet 21 is located behind the blower outlet 19, so that the blowing angle of the conditioned air blown from the blower outlet 19 approaches the lower limit to the lower limit, the position of the opening / closing plate 311 approaches the closed position. You may make it rotate and make the opening degree of the 1st suction inlet 21 small.

  At a certain point in time, when the blowout of the conditioned air blown from the blowout port 19 is a horizontal blowout, and the position of the opening / closing plate 311 is the B position in FIG. 5, as the flap 291 approaches vertically downward, the control unit 41 The position of the opening / closing plate 311 is moved between the C position or the C position and the closed position.

(3-2-4) Adjusting the opening degree of the first suction port 21 according to the capability Further, the control unit 41 may adjust the opening degree of the first suction port 21 according to the required capability of the air conditioning indoor unit. it can. In general, when the conditioned air blown from the outlet 19 has a momentum, the conditioned air is hardly sucked into the first suction port 21. The conditioned air blown out has momentum when the air volume is large, usually when the air-conditioning load in the air-conditioned space is large and capacity is required. Therefore, it is preferable to adjust the opening degree of the first suction port 21 according to the required capacity.

  For example, when the user increases the set temperature during heating operation, the air conditioner indoor unit is required to have a capacity corresponding to the increase in the set temperature, and the operating frequency of the inverter compressor (not shown) on the outdoor unit side As it rises, the rotation of the indoor fan 15 also rises, and the amount of intake air also increases. At this time, when only the amount of the intake air from the second intake port 22 is not sufficient, the opening degree of the first intake port 21 is adjusted to compensate for the insufficient intake air.

  The greater the amount of air that is supplemented, the greater the air volume of the conditioned air that is blown out from the air outlet 19, so even if the opening of the first air inlet 21 is increased, a short circuit is unlikely to occur.

  In other words, the smaller the amount of air to be sucked in, the smaller the air volume of the conditioned air blown from the air outlet 19, but there is no momentum. Circuit is unlikely to occur.

  As described above, by adopting a method of adjusting the opening degree of the first suction port 21 according to the required capacity, for example, the control unit 41 can open and close the opening / closing plate 311 according to the rotational speed of the indoor fan 15. It is only necessary to control the amount of rotation, and it is easy to adjust the opening from the viewpoint of control.

(3-2-5) Adjusting the opening degree of the first suction port 21 according to the installation conditions Furthermore, the control unit 41 restricts the rotation range of the opening / closing plate 311 to adjust the opening adjustment range of the first suction port 21. Opening selection means for keeping within a specific range is provided. For example, when there is a curtain rail close to the lower side of the first inlet 21 and it cannot be physically opened or closed, or when it is not desired to suck in air from the curtain window side, an opening / closing mode is selected and stored in advance. Thereby, the opening degree of the 1st inlet 21 can be restrict | limited.

  Since the movement of the open / close plate 311 to the position A in FIG. 5 is substantially restricted, the direction of the conditioned air blown out from the air outlet 19 as described in the section (3-2-1). Can no longer be controlled. Therefore, the control unit 41 controls the operation of the flap 291 while controlling the operation of the opening / closing plate 311 based on the range selected by the opening selection means, thereby avoiding the show and the circuit. Specifically, the posture of the flap 291 that blows down the conditioned air is avoided.

(3-3) Adjusting the opening degree of the second suction port 22 by the slide opening / closing plate 322 In the air conditioning indoor unit according to the present embodiment, the air flow from the second suction port 22 to the outlet 19 is the mainstream. When the first suction port 21 is opened, it is assumed that the second suction port 22 is open, but the opening degree adjustment of the second suction port 22 is allowed (except for the closed state). .

  For example, in a state where the opening / closing plate 311 is at the A position and the air-conditioning air shortcut does not occur and the air flow is stable with an ideal flow, the opening / closing plate 311 is rotated when it is desired to limit the amount of intake air. Rather than reducing the opening degree of the first suction port 21, it is more stable to move the slide opening / closing plate 322 of the second suction port 22 in the closing direction to reduce the opening degree of the second suction port 22. The amount of intake air can be limited without disturbing.

  Note that while the air conditioning indoor unit 2 is not operating, the slide opening / closing plate 322 is housed below the top surface of the main body casing 11 in order to keep the second suction port 22 open. This is because dust accumulates at the portion where the second suction port 22 faces the ceiling surface when stopped, so that if the slide opening / closing plate 322 is closed, the dust accumulated on the upper surface when the slide opening / closing plate 322 opens. This is to prevent it from being scratched and entering the inside of the main casing 11. Even when the operation is stopped, by opening the slide opening / closing plate 322, dust accumulates on the filter, so that dust can be prevented from entering the main body casing 11.

  Since the slide opening / closing plate 322 is stored below the top surface of the main body casing 11 while the second suction port 22 is opened, dust accumulates more than the state exposed from the top surface of the main body casing 11. It is difficult to prevent the dust from falling to the floor due to vibration when moving in the closing direction.

(4) Features (4-1)
In the air conditioning indoor unit 2, since the opening / closing plate 311 exists on the air passage (position A) that is going to flow directly from the outlet 19 to the first suction port 21, the air flow is first sucked by the opening / closing plate 311. It is deflected away from the mouth 21. As a result, the occurrence of a short circuit is suppressed.

(4-2)
The position A of the opening / closing plate 311 is a position where the end of the opening / closing plate 311 and the lower end of the bottom frame 17 are close to each other so that there is substantially no gap between the air outlet 19 and the lower end of the bottom frame 17. Of the routes from the blower outlet 19 to the first suction port 21, the route through which the conditioned air is most likely to be sucked is a route that flows so as to squeeze the lower end of the bottom frame 17. Therefore, the conditioned air is prevented from being sucked into the first suction port 21.

(4-3)
In the air conditioning indoor unit 2, when the first suction port 21 is opened, the conditioned air blown from the blower outlet 19 is adjusted so that the blowout angle is blown in a direction away from the first suction port 21. Short circuit is suppressed.

(5) Modification (5-1) First Modification FIG. 6 is a cross-sectional view of an air conditioning indoor unit according to a first modification. The operation mechanism of the flap 291 in the outlet opening / closing mechanism 29 is different from the above embodiment. In FIG. 6, in the first modified example, there is nothing corresponding to the support shaft 292 of the above embodiment, and instead, the lever 295 is pushed forward from the open position of the flap 291 in the above embodiment. Therefore, a gap is formed between the edge of the flap 291 and the lower end of the bottom frame 17.

  However, the opening / closing plate 311 moves to the A position (see FIG. 5) so that one end is close to the lower end of the bottom frame 17 and the other end is close to the edge of the flap 291. As a result, while the conditioned air was being blown out from the blowout port 19, the gap formed between the edge of the flap 291 and the bottom end of the bottom frame 17 was substantially blocked by the opening / closing plate 311, and thus was blown out. The conditioned air is suppressed from being sucked into the first suction port 21.

  In the air conditioning indoor unit according to the first modified example, the flap 291 and the opening / closing plate 311 are arranged in series and function as one large flap, so that the blowing direction of the conditioned air is stabilized.

(5-2) Second Modification FIG. 7 is a cross-sectional view of an air conditioning indoor unit according to a second modification. The operation mechanism of the opening / closing plate 311 in the first suction port opening / closing mechanism 31 is different from the above embodiment. In FIG. 7, in the second modification, there is nothing corresponding to the hinge 312 and the link 313 in the above embodiment, and the opening / closing plate 311 slides along the guide 315. The principle of the sliding movement is the same as the sliding movement of the slide opening / closing plate 322 of the second suction port 22, and a rack gear is formed in advance on the opening / closing plate 311, and the pinion gear meshing with the rack gear is used as a stepping motor or a reduction gear. The opening / closing plate 311 slides by being driven by a stepping motor having a built-in mechanism.

  In the air-conditioning indoor unit according to the second modification, for example, even if there is a curtain rail close to the lower side of the first suction port 21, a situation in which it cannot be physically opened and closed is avoided. Therefore, it is not necessary to select and store the opening / closing mode of the opening / closing plate 311 by the opening degree selection means as in the above embodiment.

(5-3) Third Modification FIG. 8A is a cross-sectional view of the vicinity of the closed first suction port of the air conditioning indoor unit according to the third modification. FIG. 8B is a cross-sectional view around the opened first inlet of the air conditioning indoor unit according to the third modification. In FIG. 8A, the first suction port 21 is provided with a first suction port opening / closing mechanism 31. The first suction opening / closing mechanism 31 includes a rotary opening / closing plate 311 and a drive motor (not shown) that rotates the opening / closing plate 311.

  The opening / closing plate 311 has a size that can be fitted into the opening of the first suction port 21 to block the first suction port 21. The pivot shaft 317 of the opening / closing plate 311 is located above both longitudinal ends of the first suction port 21. The opening / closing plate 311 and the rotation shaft 317 are connected by a hinge link 319.

  In the closed position where the opening / closing plate 311 closes the first suction port 21, the rotation shaft 317 is located above the opening / closing plate 311 and closer to the air outlet 19 than the center in the width direction of the opening / closing plate 311. Therefore, when the rotation shaft 317 rotates 90 ° in the CW direction in FIG. 8A, the opening / closing plate 311 has a vertical posture in which the outer surface is close to the front edge of the first suction port 21.

  As a result, as shown in FIG. 8B, the opening / closing plate 311 slightly protrudes vertically downward from the first suction port 21. The projecting dimension is preferably less than half of the dimension in the width direction of the opening / closing plate 311. This is because, when the installation position of the air conditioning indoor unit 2 is right above the curtain rail, if the projecting dimension of the opening / closing plate 311 is too long, it interferes with the curtain rail.

  Moreover, since the airflow that has flowed out from the air outlet 19 in the direction of the first suction port 21 flows along the surface of the shielding plate 33 (see the arrow AIR in FIG. 8B), even if the projecting dimension of the opening / closing plate 311 is the width dimension. Even if it is less than half, the airflow can be sufficiently blocked. Thus, shortcuts are prevented.

  As described above, according to the present invention, even if the suction port is adjacent to the rear of the blower outlet, the blown air is prevented from being sucked directly, which is useful for a wall-mounted air conditioning indoor unit.

2 Air conditioning indoor unit 11 Main body casing 17 Bottom frame (partition wall)
19 Air outlet 21 1st inlet (lower inlet)
29 Air outlet opening / closing mechanism (Flap drive mechanism)
31 1st inlet opening and closing mechanism (drive mechanism)
291 flap 311 opening and closing member

JP 2001-116346 A

Claims (4)

A wall-mounted air conditioner indoor unit,
A main body casing having a blower outlet (19) and a lower suction port (21) located on the wall side of the blower outlet (19) at the lower part , and guiding air from the lower suction port (21) to the inside along the back surface (11) and
An opening and closing member (311) for opening and closing the lower suction port (21);
A drive mechanism (31) for moving the opening / closing member (311);
With
Said closing member (311) when said lower inlet (21) Open the, to block the flow of air towards the lower inlet (21) from the outlet (19), said closing member (311) Of the air outlet (19) side end portion moves to the air outlet (19) side ,
The open position of the opening / closing member (311) includes a position where there is substantially no gap between the outer end of the partition wall (17) separating the blower outlet (19) and the lower suction port (21). ,
At the position where there is substantially no gap in the opening / closing member (311), the end of the opening / closing member (311) closest to the lower suction port (21) and the outer end of the partition wall (17) are Close
Air conditioning indoor unit (2). A flap (291) for adjusting a blowing angle of air blown from the blower outlet (19);
A flap drive mechanism (29) for driving the flap (291);
Further comprising
The open position of the opening / closing member (311) includes a position where there is substantially no gap with the flap (291).
The air conditioning indoor unit (2) according to claim 1. At the position where there is substantially no gap in the opening / closing member (311), the outer end of the partition wall (17) partitioning the air outlet (19) and the lower suction port (21) and one end of the opening / closing member (311). And the edge of the flap (291) and the other end of the opening and closing member (311) are close to each other,
The air conditioning indoor unit according to claim 2 . The blowing angle of air from the air outlet (19) is adjusted when the opening / closing member (311) opens the lower suction port (21).
The air conditioning indoor unit (2) according to claim 1 .

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