JP2009085541A - Indoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor unit of an air conditioner that creates an airflow circulating indoors, reduces a temperature variation, overcooling, and overheating, and makes warm air reach user's feet during heating without using an air circulation device. <P>SOLUTION: The indoor unit 2 has with a first opening 21 positioned at the lower face of a main body, and a second opening 22 disposed around the first opening 21. During a cooling operation, air is sucked from the first opening 21 and blown out of the second opening 22. During a heating operation, air is sucked from the second opening 22 and blown out of the first opening 21. As directions of an airflow during a cooling operation and that during a heating operation are reversed, compared with an indoor unit in which air is sucked from a lower part and blown out of a side, and the air flow is fixed in one direction, the temperature variation, overcooling, and overheating is reduced, and performance for making warm air reach the user's feet during heating is improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an indoor unit of a ceiling-mounted air conditioner.

Conventionally, in an indoor unit of an air conditioner installed on a ceiling surface of a room, air is sucked from directly below the indoor unit main body and air-conditioned air is blown out substantially to the side, so that warm air tends to be biased upward during heating. The warm air may not reach. For this reason, a method is adopted in which the air is recirculated by a blower having an air inlet and an air outlet to prevent temperature unevenness in the room (see, for example, Patent Document 1).
JP 2004-061059 A

  However, the above method requires an air conditioner and an air recirculation device, which increases the amount of investment, and is not suitable for small stores.

  An object of the present invention is to provide an indoor unit of an air conditioner that creates an airflow that circulates in a room without using an air recirculation device, reduces temperature unevenness, overcooling, and overheating, and that reaches the foot during heating. There is to do.

  An indoor unit of an air conditioner according to a first aspect of the present invention is a ceiling-mounted air conditioner indoor unit that sucks air from an air-conditioning target space and blows out the air-conditioned air to the air-conditioning target space. And a first opening that is located on the lower surface of the main body and serves as a suction port during cooling operation. And the 1st opening becomes a blower outlet at the time of heating operation.

  In this indoor unit, the air flow direction during cooling operation and the air flow direction during heating operation are opposite, so the air flow is sucked from below and blown from the side. Compared to a fixed indoor unit, the performance to reach the feet of warm air during heating is improved.

  The indoor unit of the air conditioner according to the second aspect of the present invention is the indoor unit of the air conditioner according to the first aspect of the present invention, and further includes a second opening that serves as a blower outlet during the cooling operation. During the heating operation, the second opening serves as a suction port.

  In this indoor unit, the air flow direction during cooling operation and the air flow direction during heating operation are opposite, so the air flow is sucked from below and blown from the side. Compared with a fixed indoor unit, temperature unevenness, over-cooling, and over-warming are reduced, and the performance of reaching warm air during heating to the feet is improved.

  An indoor unit of an air conditioner according to a third aspect of the present invention is the indoor unit of the air conditioner according to the second aspect of the present invention, and the direction of the air blown out from the second opening is not directed downward.

  In this indoor unit, it is possible to create a flow that sucks air from the side and blows it downward at least during heating operation, so that the performance of reaching warm air during heating to the feet is improved.

  An air conditioner indoor unit according to a fourth aspect of the present invention is the air conditioner indoor unit according to the second aspect of the present invention, wherein the second opening is disposed around the first opening.

  In this indoor unit, the air convection range is further expanded as compared with the type of indoor unit in which the first opening and the second opening are adjacent to each other only in one direction, so that the temperature distribution in the air-conditioning target space approaches uniformly. .

  An indoor unit of an air conditioner according to a fifth aspect of the present invention is the indoor unit of the air conditioner according to the second aspect of the present invention, a filter that removes dust by passing inhaled air, and a filter moving means that moves the filter And further. Then, when the cooling operation and the heating operation are switched, the position of the filter is switched.

  In this indoor unit, the filter can be moved to the side where the air is sucked, so even if the air flow direction is reversed, the dust of the sucked air is removed and the dust adhering to the filter is removed. Will not scatter from.

An air conditioner indoor unit according to a sixth aspect of the present invention is the air conditioner indoor unit according to the second aspect of the present invention, for allowing air to flow between the first opening and the second opening during the cooling operation. A first flow path;
A second flow path for circulating air during the heating operation is formed.

  In this indoor unit, the air flow direction can be switched reliably.

  An indoor unit of an air conditioner according to a seventh aspect of the present invention is the indoor unit of the air conditioner according to the second aspect of the present invention, and when the cooling operation and the heating operation are switched, the fan blowing direction is reversed.

  In this indoor unit, since the air flow direction can be switched, it is not necessary to switch the air path.

  An indoor unit of an air conditioner according to an eighth aspect of the present invention is the indoor unit of the air conditioner according to the second aspect of the present invention, further comprising opening area expanding means for moving the contour of the second opening in the expanding direction.

  In this indoor unit, when the second opening functions as a suction port, the suction area can be increased by increasing the opening area.

  An indoor unit of an air conditioner according to a ninth aspect is the indoor unit of the air conditioner according to the fifth aspect, wherein the filter is cleaned when the cooling operation and the heating operation are switched.

  In this indoor unit, the filter is cleaned at least every season, which prevents forgetting to clean. Further, the operation when the filter is moved can be used for cleaning.

  An air conditioner indoor unit according to a tenth aspect of the present invention is the air conditioner indoor unit according to the fifth aspect of the present invention, wherein the filter moving means is a manual type.

  In this indoor unit, since a drive source is unnecessary, the increase in size and cost of the indoor unit is suppressed.

  An indoor unit of an air conditioner according to an eleventh aspect of the invention is an indoor unit of an air conditioner according to the eighth aspect of the invention, wherein the opening area expanding means is a manual type.

  In this indoor unit, since a drive source is unnecessary, the increase in size and cost of the indoor unit is suppressed.

  In the indoor unit of the air conditioner according to the first aspect of the invention, since the air flow direction during the cooling operation and the air flow direction during the heating operation are opposite, the air flow is sucked from below and from the side. When compared with indoor units that are fixed in one direction, such as being blown out, the performance of reaching warm air during heating to the feet is improved.

  In the indoor unit of the air conditioner according to the second aspect of the invention, the air flow direction during the cooling operation and the air flow direction during the heating operation are opposite, so the air flow is sucked from below and from the side. Compared with an indoor unit that is fixed in one direction such as being blown out, temperature unevenness, excessive cooling, and excessive warming are reduced, and the performance of reaching warm air during heating is improved.

  In the indoor unit of the air conditioner according to the third aspect of the present invention, it is possible to create a flow that sucks air from the side and blows it downward at least during heating operation, so that the performance of reaching warm air during heating to the feet is improved.

  In the indoor unit of the air conditioner according to the fourth aspect of the present invention, the air convection range is further expanded as compared with an indoor unit in which the first opening and the second opening are adjacent to only one direction side. The temperature distribution in the space approaches uniform.

  In the indoor unit of the air conditioner according to the fifth aspect of the invention, since the filter can be moved to the side where air is sucked, even if the air flow direction is reversed, dust in the sucked air is removed, and the filter Dust adhering to the filter is not scattered from the filter.

  In the indoor unit of the air conditioning apparatus according to the sixth aspect of the present invention, the air flow direction can be switched reliably.

  In the indoor unit of the air conditioner according to the seventh aspect of the present invention, the air flow direction can be switched without switching the air path.

  In the indoor unit of the air conditioner according to the eighth aspect of the invention, when sucking air, when the second opening functions as a suction port, the opening area can be enlarged to increase the suction amount.

  In the indoor unit of the air conditioner according to the ninth aspect of the invention, the filter is cleaned at least every season, and forgetting to clean is prevented. Further, the operation when the filter is moved can be used for cleaning.

  In the indoor unit of the air conditioner according to the tenth and eleventh inventions, a drive source is not required, so that an increase in the size and cost of the indoor unit is suppressed.

  Embodiments of the present invention will be described below 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.

<Configuration of indoor unit>
FIG. 1 is a partial cross-sectional view illustrating the air flow during cooling operation in an indoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view illustrating the air flow during the heating operation in the indoor unit of the air conditioner according to the embodiment of the present invention.

  1 and 2, the indoor unit 2 is a ceiling-embedded indoor unit, and includes a filter 6, an indoor heat exchanger 12, a fan 13, and a main body 20 that houses them inside. . In the main body 20, a main body upper part 20a embedded in the ceiling and a main body lower part 20b exposed from the ceiling are integrated.

  The filter 6 is arranged inside the main body lower part 20b, and the indoor heat exchanger 12 and the fan 13 are arranged inside the main body upper part 20a. The fan 13 is located in the center of the main body upper portion 20 a and the indoor heat exchanger 12 is located so as to surround the fan 13.

  A first opening 21 is provided on the lower surface of the main body lower portion 20b. A second opening 22 is provided on the four side surfaces of the lower body portion 20b so as to surround the first opening 21.

  In FIG. 1, during the cooling operation, the fan 13 rotates forward and air is sucked from the first opening 21. The filter 6 is located on the downstream side of the air flow A from the first opening 21, and removes dust from the air sucked from the first opening 21. Thereafter, the air is deprived of heat by the indoor heat exchanger 12 and becomes low temperature, and is blown out from the second opening 22. That is, during the cooling operation, the first opening 21 serves as a suction port, and the second opening 22 serves as a blower outlet.

  In FIG. 2, during the heating operation, the fan 13 rotates reversely and air is sucked from the second opening 22. The filter 6 is located downstream of the second opening 22 in the air flow B, and removes dust from the air sucked from the second opening 22. Thereafter, the air is deprived of heat in the indoor heat exchanger 12 and becomes high temperature, and is blown out from the first opening 21. That is, during the heating operation, the second opening 22 serves as a suction port, and the first opening 21 serves as a blower outlet.

<Filter moving means>
FIG. 3 is a development view when the filter is flatly developed at a position during cooling operation, and FIG. 4 is a development view when the filter is flatly developed at a position during heating operation. 3 and 4, one first opening 21 is surrounded by four second openings 22 on four sides. During the cooling operation (see FIG. 3), the first opening 21 is covered with four filters 6, and during the heating operation (see FIG. 4), each of the four second openings 22 is covered with the corresponding filter 6. .

  When the operation mode is switched from cooling to heating, the filter 6 changes from the state of FIG. 3 to the state of FIG. 4, and when the operation mode is switched from heating to cooling, the state of FIG. It becomes a state.

(Filter 6)
5 is an enlarged view of a portion X in FIG. 1, and FIG. 6 is an enlarged view of a portion Y in FIG. 5 and 6, the filter 6 has a support frame 6a that supports the filter body. In the present embodiment, the support frame 6a is formed of an elastomer and is easily deformed by an external force, but is easily restored when the external force is lost. The material of the support frame 6a is not limited to the elastomer, but is selected from polymer materials such as rubber and resin. Racks 61 that mesh with gears are formed on the support frames 6 a at the left and right ends of the filter 6.

(Roller 31)
The roller 31 has a pinion gear 32 on the outer periphery, and is rotationally driven by a gear drive motor. Since the pinion gear 32 meshes with the rack 61 of the filter 6, the filter 6 moves in the guide member 41 when the pinion gear 32 rotates.

(Guide member 41)
The guide member 41 has a guide groove 42 that becomes a track when the filter 6 moves. The guide groove 42 is a groove formed by connecting the first guide groove 42 a, the second guide groove 42 b, and the third guide groove 42 c, and the length of the first guide groove 42 a is about 3 minutes in the longitudinal direction of the filter 6. The length of the second guide groove 42b corresponds to about one third of the length of the filter 6 in the longitudinal direction. The third guide groove 42c forms an arcuate track coaxial with the tip circle of the pinion gear 32, and connects one end of the first guide groove 42a and one end of the second guide groove 42b. The filter 6 moves along the guide groove 42 and stops at a predetermined position. The position of the filter 6 is detected by the position detection switch 50.

(Position detection switch 50)
The position detection switch 50 is disposed near the terminal ends of the first guide groove 42a and the second guide groove 42b. The position detection switch 50 is a limit switch that opens and closes an internal contact by operating a button, and a lever 50a for pressing the button is attached to the outside in a hinged manner. The lever 50a rotates by contacting the corner of the filter 6 to press the button, and at this time, an ON signal is output.

  For convenience of explanation, the position detection switch 50 arranged in the first guide groove 42 a is called a first switch 51, and the position detection switch 50 arranged in the second guide groove 42 b is called a second switch 52. Furthermore, the position of the filter 6 when the first switch 51 is on is called a cooling position, and the position of the filter 6 when the second switch 52 is on is called a heating position.

(Control unit 8)
FIG. 7 is a block diagram of the control unit. In FIG. 7, the control unit 8 includes a CPU 81 and a memory 82, controls various motors via a motor drive circuit 83, and controls the rotation direction and the rotation speed of the fan 13 via a fan drive circuit 84. . The control unit 8 performs position determination and movement control of the filter 6 based on signals from the first switch 51 and the second switch 52.

(Operation of filter 6)
After the power is turned on, the control unit 8 checks the output signals of the first switch 51 and the second switch 52 in order to determine the position of the filter 6. When the first switch 51 is on, it is determined that the filter 6 is in the cooling position, and when the second switch 52 is on, it is determined that the filter 6 is in the heating position.

  When the user selects the cooling operation, the first opening 21 serves as a suction port, so the filter 6 must be in the cooling position. When the first switch 51 is on, the movement of the filter 6 is not necessary. However, when the first switch 51 is off and the second switch 52 is on, the filter 6 is in the heating position, so it reaches the cooling position. Must be moved.

  Therefore, the control unit 8 rotates the pinion gear 32 in the b direction (see FIG. 6) with the roller drive motor 34. Since the pinion gear 32 meshes with the rack 61 of the filter 6, the filter 6 enters the first guide groove 42a from the second guide groove 42b. Then, when the first switch 51 outputs an ON signal, it is determined that the movement to the cooling position is completed, and the roller drive motor 34 is stopped.

  On the other hand, when the user selects heating operation, the second opening 22 serves as a suction port, so the filter 6 must be in the heating position. When the second switch 52 is on, the movement of the filter 6 is not necessary. However, when the second switch 52 is off and the first switch 51 is on, the filter 6 is in the cooling position, so that the heating position is reached. Must be moved.

  Therefore, the control unit 8 rotates the pinion gear 32 in the direction a (see FIG. 5) with the roller drive motor 34. Since the pinion gear 32 meshes with the rack 61 of the filter 6, the filter 6 enters the second guide groove 42b from the first guide groove 42a. When the second switch 52 outputs an ON signal, it is determined that the movement to the heating position is completed, and the roller drive motor 34 is stopped.

(Cleaning of filter 6)
In the indoor unit 2, the filter 6 is automatically cleaned by the control unit 8 periodically or when the user needs it. The mechanism will be described below.

  5 and 6, a dust box 70 is detachably attached to the lower surface of the lower body 20b, and a brush 71 is disposed inside. The brush 71 is in contact with the filter 6 and is rotationally driven by a brush drive motor 73.

  For example, when the filter 6 is moved by switching the operation mode, by rotating the brush 71, dust adhered to the surface of the filter 6 is scraped into the dust box 70, and the dust adhered to the brush 71 is combed. 72 is scraped off into the dust box 70. The brush 71 is rotating at least during the period in which the filter 6 is moving, and the direction of rotation is opposite to the direction of travel of the filter 6.

  The filter 6 can be cleaned periodically or by remote control operation when required by the user, other than when the operation mode is switched.

<Features>
(1)
The indoor unit 2 includes a first opening 21 located on the lower surface of the main body and a second opening 22 disposed around the first opening 21. During the cooling operation, air is sucked from the first opening 21 and blown out from the second opening 22. Further, during the heating operation, air is sucked from the second opening 22 and blown out from the first opening 21. For this reason, the air flow direction during the cooling operation and the air flow direction during the heating operation are opposite, so that the air flow is fixed in one direction such that the air flow is sucked from below and blown out from the side. Compared with an indoor unit, temperature unevenness, excessive cooling, and excessive warming can be reduced, and the performance of reaching warm air during heating to the feet can be improved. Further, in the indoor unit 2, since the fan blowing direction is reversed when the cooling operation and the heating operation are switched, the air flow direction can be switched, so that the switching of the air path is unnecessary.

(2)
In the indoor unit 2, the rack 61 included in the filter 6 and the pinion gear 32 included in the roller 31 are engaged with each other. By rotating the roller driving motor 34, the filter 6 is moved to the first opening 21 side and the second opening 22. It can be moved to either one side. For this reason, the filter 6 can be moved to the side where the air is sucked regardless of which of the first opening 21 and the second opening 22 is the suction port, so that dust in the sucked air can be removed. Even if the air flow direction is reversed, the filter 6 is on the suction port side, so that the dust once attached to the filter 6 is not scattered. Further, in the indoor unit 2, the filter 6 is cleaned when switching between the cooling operation and the heating operation. Therefore, the filter 6 is cleaned at least every season, and forgetting to clean is prevented. Further, since the operation when the filter 6 is moved is used for cleaning, the operation efficiency is good.

<First Modification>
When the operation mode is switched from the cooling operation to the heating operation, the second opening 22 functioning as the outlet during the cooling operation becomes the suction port. Therefore, if the opening area of the second opening 22 can be enlarged, the heating is performed. It is advantageous in improving the capacity. In the following first modification, a part of the above-described embodiment is changed so that the opening area of the second opening 22 can be enlarged.

  FIG. 8 is a partial cross-sectional view during the cooling operation of the indoor unit according to the first modification, and FIG. 9 is a partial cross-sectional view during the heating operation of the indoor unit according to the first modification. 8 and 9, the upper side of the main body lower part 20b above the second opening 22 is fixed to the main body upper part 20a, and for convenience of explanation, it is called a fixing part 20c. Further, the lower side of the main body lower part 20b from the second opening 22 can move downward, and for convenience of explanation, it is referred to as a movable part 20d.

  The movable unit 20d is moved by the elevating unit 90. The lifting / lowering unit 90 includes a pulley 91 that is rotated by a motor, and a wire 92 that is wound around or pulled out from the pulley 91. The elevating unit 90 is housed in the fixed portion 20c, and the wire 92 passes through the fixed portion 20c and is connected to the movable portion 20d. The elevating unit 90 is controlled by the control unit 8.

  In FIG. 9, the movable unit 20d moves downward by rotating the pulley 91 in a direction in which the lifting unit 90 feeds the wire 92 (hereinafter referred to as forward rotation). The movable portion 20 d moves by a distance D at the maximum. At this time, the second guide groove 42 b of the guide member 41 is divided vertically by the boundary line 43.

(Operation of movable part 20d)
When the user selects the heating operation, the second opening 22 serves as a suction port. Therefore, the control unit 8 rotates the pulley 91 of the elevating unit 90 in the normal direction, feeds the wire 92, and moves the movable unit 20d by the distance D. Lower. When the amount of descent of the movable part 20d reaches the distance D, the stopper 23 hits the inner wall of the fixed part 20c, so that the descent further does not occur (see FIG. 9).

  Further, since the filter 6 must be in the heating position, the control unit 8 rotates the pinion gear 32 in the a direction (see FIGS. 8 and 9) with the roller drive motor 34. When the filter 6 enters the second guide groove 42b from the first guide groove 42a and the second switch 52 outputs an ON signal, it is determined that the movement to the heating position is completed, and the roller drive motor 34 Stop.

  On the other hand, when the user selects the cooling operation, the second opening 22 serves as a blower outlet, so the opening area may be smaller than that during the heating operation. Therefore, the control unit 8 reversely rotates the pulley 91 of the elevating unit 90, winds up the wire 92, and raises the movable unit 20d by the distance D. When the rising amount of the movable part 20d reaches the distance D, the stopper 23 hits the inner wall of the fixed part 20c, so that it does not rise any further (see FIG. 8).

  Further, since the filter 6 must be in the cooling position, the control unit 8 rotates the pinion gear 32 in the b direction with the roller drive motor 34. When the filter 6 enters the first guide groove 42a from the second guide groove 42b and the first switch 51 outputs an ON signal, it is determined that the movement to the cooling position is completed, and the roller drive motor 34 Stop.

  As described above, in the first modification, since the opening area of the second opening 22 can be enlarged by the lifting unit 90, when the second opening 22 functions as a suction port, the suction amount can be increased. .

<Second Modification>
In the above embodiment, the rotation direction of the fan 13 is changed to switch the air circulation direction. However, the installation direction of the fan 13 and the air path may be switched. FIG. 10A is a cross-sectional view of the indoor unit according to the second modification during cooling operation, FIG. 10B is a cross-sectional view before switching to the heating operation of the indoor unit, and FIG. It is sectional drawing at the time of the heating operation of the indoor unit.

  In FIG. 10A, the movable chamber 25 is disposed on the outer upper side of the main body upper portion 20 a and has a space that can accommodate the fan 13. The fan attitude control motor 100 is disposed on the outer side of the main body upper portion 20 a, and its shaft is connected to the side surface of the fan 13. The control unit 8 controls the fan attitude control motor 100.

  During the cooling operation, the fan 13 has the rotation shaft directed toward the first opening 21, and when the fan 13 is operated, air is sucked from the first opening 21 and passes through the cooling air passage 121 to be second. It blows out from the opening 22. In addition, the dashed-two dotted line arrow in a figure has shown the flow direction of air.

  In FIG. 10B, when the operation mode is switched from the cooling operation to the heating operation, the fan attitude control motor 100 reverses the fan 13 by 180 ° and stores it in the movable chamber 25. The fan 13 and the movable chamber 25 are connected by a link mechanism, and at the same time as the fan 13 is inverted 180 °, the movable wall 26 is rotated 90 ° so that air can flow around the fan 13. 27 and a second window 28 are formed. Thereafter, the movable chamber 25 descends in the direction of the first opening 21 and is stored in the main body upper portion 20a.

  In FIG.10 (c), the fan 13 has the rotating shaft turned to the direction on the opposite side to the 1st opening 21, and when the fan 13 operate | moves, air is suck | inhaled from the 2nd opening 22, and the air path for heating It passes through 122 and is blown out from the first opening 21. In addition, the dashed-two dotted line arrow in a figure has shown the flow direction of air.

  As described above, in the second modification, the cooling flow path 121 for circulating air during the cooling operation and the heating flow path 122 for circulating air during the heating operation are formed. The flow direction can be switched reliably.

<Third Modification>
In the second modified example, the posture and the air path of the fan 13 are changed in order to switch the air circulation direction, but two fans may be arranged to switch the fan to be used. FIG. 11 is a cross-sectional view of an indoor unit of an air conditioner according to a third modification. In FIG. 11, the indoor unit 2 includes a fan 13 and a second fan 113 for heating operation. During the cooling operation, the fan 13 is inside the main body upper portion 20a, and the second fan 113 is positioned outside the movable wall 126 of the main body upper portion 20a. Since the upper part 20a of the main body is stored behind the ceiling, the second fan 113 cannot be seen from the room.

  The movable wall 126 is connected to the rotation shaft of the switching motor 200 disposed outside the main body upper portion 20a, and the fan 13 and the second fan 113 are switched when the switching motor 200 rotates 180 °. The fan 13 and the second fan 113 have opposite blade angles, and the air flowing direction is reversed even if the rotation direction is the same.

  The control of the switching motor 200 is performed by the control unit 8. When the user selects the cooling operation, the fan 13 enters the main body upper part 20a, and when the user selects the heating operation, the second fan 113 is controlled by the main body upper part 20a. The switching motor 200 is rotationally controlled so as to enter the inside.

<Others>
In the above embodiment, the roller 31 is rotated by the roller drive motor 34 and the filter 6 is moved. However, the roller 31 may be manually rotated or the filter 6 may be manually slid. Good.

  In the first modification, the movable unit 20d is moved up and down by the lifting unit 90. However, the movable unit 20d may be moved up and down manually. However, when it is raised manually, it is necessary to fix it at the stop position with a bolt or the like so that the movable part 20d does not descend by its own weight.

  In the third modified example, the movable wall 126 is rotated by the switching motor 200 and the fan 13 and the second fan 113 are exchanged. However, the movable wall 26 may be manually rotated.

  Further, in order to change the air circulation direction without changing the rotation direction with the fan 13 alone, it is also possible to change the angle of the blade of the fan 13 and change the angle manually when switching the operation mode. Further, it is possible to replace the entire blade when switching the operation mode.

  As described above, since the drive source is not required by performing manually, an increase in the size and cost of the indoor unit is suppressed.

As described above, according to the present invention, since the suction port and the air outlet can be switched according to the cooling operation and the heating operation, the indoor unit of the air conditioner of the ceiling embedded type and the ceiling suspended type Useful for.

In the indoor unit of the air conditioning apparatus which concerns on one Embodiment of this invention, the fragmentary sectional view which described together the flow of the air at the time of air_conditionaing | cooling operation. In the same indoor unit, a partial cross-sectional view that also shows the air flow during heating operation. FIG. 3 is a development view when the filter is flatly developed at a position during cooling operation. The expanded view when a filter is planarly developed in the position at the time of heating operation. The enlarged view of the X section of FIG. The enlarged view of the Y section of FIG. The block diagram of a control part. The fragmentary sectional view at the time of air_conditionaing | cooling operation | movement of the indoor unit which concerns on a 1st modification. The fragmentary sectional view at the time of the heating operation of the indoor unit which concerns on a 1st modification. (A) Sectional drawing at the time of air_conditionaing | cooling operation of the indoor unit which concerns on a 2nd modification. (B) Sectional view before switching to heating operation of the indoor unit. (C) Sectional view at the time of heating operation of the indoor unit. Sectional drawing of the indoor unit which concerns on a 3rd modification.

Explanation of symbols

2 Indoor unit 6 Filter 13 Fan 20 Main body 21 First opening 22 Second opening 31 Roller (filter moving means)
32 pinion gear (filter moving means)
61 rack (filter moving means)
90 Lifting unit (opening surface enlargement means)
121 Air path for cooling (first flow path)
122 Air path for heating (second flow path)

Claims (11)

An indoor unit of a ceiling-installed air conditioner that sucks air from a space to be air-conditioned and blows out the air-conditioned air to the space to be air-conditioned,
A fan (13) for sucking and blowing air;
A first opening (21) located on the lower surface of the main body (20) and serving as a suction port during cooling operation;
With
During the heating operation, the first opening (21) serves as a blowout port.
Air conditioner indoor unit (2). A second opening (22) serving as a blow-out opening during cooling operation;
During the heating operation, the second opening (22) serves as a suction port.
The indoor unit (2) of the air conditioning apparatus according to claim 1. The direction of the air blown out from the second opening (22) does not face directly below,
The indoor unit of the air conditioning apparatus of Claim 2. The second opening (22) is disposed around the first opening (21).
The indoor unit (2) of the air conditioning apparatus according to claim 2. A filter (6) that removes dust by passing inhaled air;
Filter moving means for moving the filter;
Further comprising
When the cooling operation and the heating operation are switched, the position of the filter (6) is switched.
The indoor unit of the air conditioning apparatus of Claim 2. Between the first opening (21) and the second opening (22),
A first flow path for circulating air during cooling operation;
A second flow path for circulating air during heating operation;
Is formed,
The indoor unit (2) of the air conditioning apparatus according to claim 2. When the cooling operation and the heating operation are switched, the blowing direction of the fan (13) is reversed.
The indoor unit (2) of the air conditioning apparatus according to claim 2. An opening area expanding means for moving the contour of the second opening (22) in the expanding direction;
The indoor unit (2) of the air conditioning apparatus according to claim 2. When the cooling operation and the heating operation are switched, the filter (6) is cleaned.
The indoor unit (2) of the air conditioning apparatus according to claim 5. The filter moving means is manual;
The indoor unit of the air conditioning apparatus of Claim 5. The opening area expanding means is a manual type.
The indoor unit of the air conditioning apparatus of Claim 8.

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