JP6222252B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner. More specifically, the present invention relates to an indoor unit of an air conditioner that uses a slightly flammable or flammable refrigerant.

  In recent years, the adoption of R32 refrigerant having a low global warming potential is progressing in air conditioners that cool and heat indoors using a vapor compression refrigeration cycle. However, the R32 refrigerant has a slight flammability (slightly flammability). In particular, in the case of a floor-standing indoor unit, if a refrigerant having a specific gravity greater than that of air leaks, it stays near the floor surface, and the flammable concentration There is a possibility of reaching. For this reason, in order to determine the presence or absence of leakage from the refrigerant circuit, a refrigerant sensor is arranged in the indoor unit, and when the refrigerant sensor detects leakage of the refrigerant, the indoor fan provided in the indoor unit is driven to cause the leakage refrigerant. Has been proposed (see, for example, Patent Document 1). According to the air conditioning apparatus described in Patent Literature 1, it is possible to prevent the refrigerant from reaching a flammable concentration by diffusing the leaked refrigerant by blowing air, and to ensure safety for indoor residents when the refrigerant leaks. it can.

Japanese Patent Laid-Open No. 11-37619

  However, if the operation in a state where the air is very dirty continues and the filter provided at the air intake port of the indoor unit is clogged, the air flow rate of the indoor fan decreases. For example, an indoor unit arranged near the wall of a perimeter zone in a living space usually has a short distance of about 600 mm from the floor surface to the air outlet on the top surface of the indoor unit. The air cannot be blown up to the position. The air blown up from the outlet expands into the living space from a high position in the living space, so that an efficient diffusion effect of the leaked refrigerant can be obtained, but if the blowing height is lowered, a sufficient diffusion effect can be obtained. Can not be.

  This invention is made | formed in view of such a situation, and it aims at providing the indoor unit of the air conditioning apparatus which can improve the diffusion effect of a leaking refrigerant | coolant.

(1) The indoor unit of the air conditioner of the present invention (hereinafter, also simply referred to as “indoor unit”) is a condition in which heat is exchanged by a heat exchanger using a slightly flammable or flammable refrigerant having a specific gravity greater than that of air. An indoor unit of an air conditioner that blows air from an outlet through an indoor fan into the room,
A refrigerant detector for detecting leaked refrigerant;
An outlet opening / closing mechanism capable of closing a part of the outlet, and when the refrigerant detector detects a refrigerant leak, the outlet opening / closing mechanism normally closes a part of the outlet. Drive the indoor fan in a state where the blowout opening area of the blowout opening is reduced than during operation ,
The indoor unit is a floor-standing indoor unit,
The outlet is a rectangular outlet formed on the upper surface of the casing of the indoor unit,
The indoor unit is disposed near the wall so that one long side of the rectangular air outlet is along the wall surface,
The air outlet opening and closing mechanism that is configured to close the wall and portions along the long side of the opposite side of the rectangular air outlet.

In the indoor unit of the present invention, when performing a diffusion operation in which the refrigerant is diffused when a refrigerant detector such as a refrigerant sensor detects leakage of the refrigerant, a part of the outlet is closed by the outlet opening / closing mechanism. Suppress or block blowout of conditioned air from some parts. By carrying out like this, a conditioned air can be blown out from the said blower outlet by making a wind speed larger than the time of the normal driving | operation with the blower outlet being fully opened. For this reason, the spreading | diffusion effect of a leaking refrigerant | coolant can be improved. For example, in the case of a floor-standing indoor unit, the air blowing height from the floor surface can be increased, and the diffusion efficiency of leaked refrigerant can be increased by diffusing air from a high position in the living space. Can do. Also, even when the wind speed from the outlet is decreasing due to filter clogging, etc., by closing a part of the outlet and reducing the area of the outlet, the wind speed of the blown air is secured to prevent leakage of the refrigerant. The diffusion effect can be improved.
In addition, since the air blown out from the blowout port is blown out along the wall, the air blow-up height is increased by a synergistic effect with increasing the wind speed of the blown air by reducing the area of the blowout port. Can be high. As a result, since the leaked refrigerant is diffused from a high position in the living space, the possibility that the leaked refrigerant has a flammable concentration is reduced.

  In the present specification, “partially closing a part of the air outlet” is not only for substantially blocking air blowing from the part but also for example when using an openable / closable flap. This is a concept including a case where the opening degree is reduced to suppress the blowing of air.

(2) In the indoor unit of (1), a plurality of flaps are disposed at the air outlet, at least a part of the plurality of flaps is an openable / closable flap, and the air outlet opening / closing mechanism includes: The flap which can be opened and closed can be configured to close. In this case, by closing some of the plurality of flaps, the area of the air outlet can be reduced and the wind speed of the air blown from the air outlet can be increased.

(3) In the indoor unit of the above (1), shielding plate capable of closing a portion of the air outlet is provided to those該吹outlet, the air outlet opening and closing mechanism is one of the air outlet in the shield plate The part can be configured to be closed. In this case, by closing a part of the outlet with the shielding plate, the area of the outlet can be reduced and the wind speed of the air blown from the outlet can be increased.

( 4 ) In the indoor units of the above (1) to ( 3 ), a wind speed sensor is disposed at the suction port of the indoor unit, and the wind speed measured by the wind speed sensor is less than or equal to a predetermined value. The outlet can be further closed by the outlet opening / closing mechanism. In this case, it is determined that the filter provided in the suction port is clogged based on the value of the wind speed measured by the wind speed sensor, and the outlet is further closed than the portion closed by the refrigerant detection. By further reducing the blowout area, it is possible to ensure the wind speed of the air blown out from the blowout port. Thereby, the spreading | diffusion effect of a leaking refrigerant | coolant can be improved.

( 5 ) In the indoor units of the above (1) to ( 4 ), the outlet is rectangular.
The outlet opening / closing mechanism can close a part of the outlet so that the aspect ratio of the outlet outlet shape approaches 1 as compared with the outlet outlet shape before leakage detection. In this case, the air is blown out from the rectangular air outlet having the same area by blowing air from the air outlet having a shape close to a square with an aspect ratio close to 1, compared with the shape of the air outlet before the leakage detection. The distance can be increased, and the diffusion effect of the leaked refrigerant can be improved. For example, in the case of a floor-standing indoor unit, the height of air blown from the air outlet can be increased by bringing the aspect ratio of the shape of the air outlet close to 1.

  According to the indoor unit of the present invention, the diffusion effect of the leaked refrigerant can be improved.

It is front explanatory drawing of one Embodiment of the indoor unit of this invention. It is a plane explanatory view of the indoor unit shown in FIG. It is side surface explanatory drawing of the indoor unit shown by FIG. (A) is AA sectional view explanatory drawing when the flap arrange | positioned in the blower outlet is a full open state, (b) is AA sectional view explanatory drawing when a part of the flap is closed. It is. It is sectional explanatory drawing of the blower outlet part in other embodiment of the indoor unit of this invention. It is plane explanatory drawing of other embodiment of the indoor unit of this invention. (A) is a BB line cross-section explanatory drawing when the flap arrange | positioned at the blower outlet is a full open state, (b) is a BB line cross-section explanatory drawing when the flap is a fully closed state. . It is a perspective view which shows the external appearance of other embodiment of the indoor unit of this invention. It is a front view which shows the external appearance of other embodiment of the indoor unit of this invention. It is a front view of the state which removed the front lower panel, lower panel cover, and vertical flap of the indoor unit shown by FIGS. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the external appearance of the indoor unit which can apply this invention. It is sectional drawing of the indoor unit shown by FIG. It is a front view of the state which removed the front panel and front grill of the indoor unit shown by FIGS.

  Hereinafter, embodiments of an indoor unit of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory front view of an indoor unit 1 according to an embodiment of the present invention, FIG. 2 is an explanatory plan view of the indoor unit 1 shown in FIG. 1, and FIG. 3 is shown in FIG. It is side surface explanatory drawing of the indoor unit.

 An indoor unit 1 according to the present embodiment is a floor-standing indoor unit that is mainly disposed near a wall in a perimeter zone of a living space, and has a suction port 4 formed on a lower surface (bottom surface) of a box-shaped casing 2. The air is sucked in, and conditioned air is blown out into the living space from the outlet 5 formed on the upper surface of the casing 2. The air outlet 5 has a rectangular shape, and is arranged near the wall so that one long side thereof is along the wall surface 13 (see FIG. 2). The height of the casing 2 is normally about 600 mm from the floor surface, and conditioned air is blown into the living space from a relatively low position. As shown in FIG. 3, a heat exchanger 3 and an indoor fan 6 are disposed in the casing 2. The heat exchanger 3 is disposed in the upper region in the casing 2, and the indoor fan 6 is disposed in the lower region in the casing 2.

  A drain pan 7 is disposed below the heat exchanger 3, and a refrigerant sensor that is a refrigerant detection unit that detects a refrigerant leak on the back surface of the front panel 2 a of the casing 2 further below the drain pan 7. 8 is provided. The refrigerant sensor 8 detects the leakage of the refrigerant from the heat exchanger 3 or the leakage of the refrigerant from a connection portion between the refrigerant pipe 3a of the heat exchanger 3 and an external refrigerant pipe (not shown). . In the present embodiment, a wind speed sensor 22 that measures the wind speed of air sucked into the apparatus from the suction port 4 is disposed on the back surface of the suction port 4. The suction port 4 is provided with a filter (not shown).

A plurality of flaps 10 are disposed at the air outlet 5 . The flap 10 is disposed along the longitudinal direction of the casing 2 (left-right direction in FIGS. 1 and 2). The flap 10 has a strip shape and can be made of a synthetic resin such as ABS. In the present embodiment, two flaps 10 on the front side (lower side in FIG. 2) of the indoor unit 1 among the six flaps 10 are configured to be opened and closed by the motor 9. The remaining four flaps 10 have a structure in which the opening degree can be adjusted manually. In the present embodiment, the motor 9 and the two flaps 10 that can be opened and closed constitute a blowout opening / closing mechanism.

  The indoor unit 1 is in a state where all of the six flaps 10 are opened during normal operation (see FIG. 4A). When the refrigerant leak is detected by the refrigerant sensor 8, this detection signal is transmitted to the control unit of the indoor unit 1 (not shown), and the motor 9 is driven by the drive signal from the control unit to drive the most front side. The one flap 10 (the leftmost flap in FIG. 4) is closed. Further, in the present embodiment, the wind speed sensor 22 is disposed in the suction port 4 as described above, and the wind speed value measured by the wind speed sensor 22 is a predetermined value (for example, 80% of the design wind speed) or less. If so, the motor 9 is driven by the drive signal from the control unit, and the second flap 10 from the front side is also closed (see FIG. 4B). That is, when the value of the wind speed measured by the wind speed sensor 22 is equal to or lower than a predetermined value, it is determined that the filter provided in the suction port 4 is clogged, and further than the portion closed by the refrigerant detection. By closing the blowout port 5 and further reducing the blowout area of the blowout port 5, the wind speed of the air blown out from the blowout port 5 is secured. In the present embodiment, one flap 10 is further closed, and a total of two flaps 10 are closed.

  When the indoor unit 1 is operated, even if the refrigerant leaks, the leaked refrigerant is diffused by the air sucked from the suction port 4, so that there is almost no possibility of being detected by the refrigerant sensor 8, and the refrigerant leak is Usually, it is detected when the operation of the indoor unit 1 is stopped. In this case, first, the indoor fan 6 is driven in a state where the frontmost flap 10 is closed, and if the wind speed value measured by the wind speed sensor 22 is equal to or less than a predetermined value, The second flap 10 is also closed. In the above description, the number of movable flaps that can be opened and closed and the number of flaps that are closed when refrigerant leakage is detected are examples, and these numbers may be other numbers.

  Further, as described above, the “closing” of the flap 10 is not limited to the case where the air blowing from the flap 10 is substantially blocked as shown by the solid line in FIG. As shown by a two-dot chain line in (b), the case where the opening degree of the flap 10 is reduced to suppress the blowing of air is also included.

  When performing a diffusion operation in which the refrigerant is diffused when the refrigerant sensor 8 detects leakage of the refrigerant, a part of the plurality of flaps 10 is closed by the motor 9 to suppress blowing of conditioned air from the part. By shutting off, conditioned air can be blown out from the air outlet 5 by increasing the wind speed compared to the normal operation in which the air outlet 5 is fully open. Thereby, the blowing height of the air from a floor surface can be made high, and the diffusion efficiency of a leakage refrigerant | coolant can be improved by diffusing air from the high position of living space.

  Moreover, in this embodiment, the part along the long side on the opposite side to a wall among the rectangular blower outlets 5 is closed. In this case, since the air blown out from the blowout port 5 is blown out along the wall surface 13, the air blown out by the synergistic effect of increasing the wind speed of the blown air by reducing the area of the blowout port 5. Raised height can be increased. As a result, since the leaked refrigerant is diffused from a high position in the living space, the possibility that the leaked refrigerant has a flammable concentration is reduced.

  FIG. 5 is a cross-sectional explanatory view of a blowout port portion in an indoor unit according to another embodiment of the present invention. In FIG. 5, the left side is the front side of the indoor unit. In this embodiment, a synthetic resin grill 19 is disposed at the outlet 18 of the indoor unit. A shield plate 20 having a band plate shape (a shape elongated in the through-plane direction in FIG. 5) capable of closing a part of the air outlet 18 is disposed on the rear surface side of the grill 19. A rotating shaft 17 is provided on one side edge of the shielding plate 20, and a rotating shaft (not shown) of a motor 21 disposed on the back side of the grill 19 is connected to the rotating shaft 17. Yes. By driving the motor 21, the shielding plate 20 can be rotated between an open position indicated by a two-dot chain line in FIG. 5 and a closed position indicated by a solid line in FIG. In this embodiment, the said shielding board 20, the rotating shaft 17, and the motor 21 comprise the blower outlet opening / closing mechanism which can close a part of blower outlet 18. FIG. The shielding plate may be disposed outside the casing 2, that is, on the surface side of the grill 19 in this embodiment.

  During normal operation, the shielding plate 20 is in an open position indicated by a two-dot chain line. When the refrigerant leak is detected by the refrigerant sensor 8, this detection signal is transmitted to the control unit of the indoor unit 1 (not shown), and the motor 21 is driven by the drive signal from the control unit so that the shielding plate 20 is It rotates to the position shown by the solid line, and a part of the air outlet 18 is closed. In this way, a part of the air outlet 18 is closed, and the blowout of the conditioned air from the part is suppressed or blocked, so that the air speed is increased compared with the normal operation in which the air outlet 18 is fully opened. The conditioned air can be blown from 18. Thereby, the blowing height of the air from a floor surface can be made high, and the diffusion efficiency of a leakage refrigerant | coolant can be improved by diffusing air from the high position of living space.

  FIG. 6 is an explanatory plan view of an indoor unit according to still another embodiment of the present invention. In the present embodiment, a synthetic resin grill 31 is disposed at the longitudinal center of the air outlet 30, and the left region L and the right region R on both sides of the grill 31 can be opened and closed respectively. The flap 32 is disposed. Each of the plurality of flaps 32 is provided with a rotation shaft 33, and each flap 32 is in an open state (see FIG. 7A) standing substantially vertically with the rotation shaft 33 as the rotation center, and closed horizontally. It is configured to be able to take two states (see FIG. 7B). For this purpose, the plurality of flaps 32 are connected to the interlocking plate 34, and the flap 32 can take the two states by moving the interlocking plate 34 in the horizontal direction. The horizontal movement of the interlocking plate 34 can be performed using, for example, a stepping motor (not shown). In the present embodiment, the flap 32, the rotating shaft 33, the interlocking plate 34, and the stepping motor constitute an air outlet opening / closing mechanism that can close a part of the air outlet 30.

  During normal operation, the flap 32 is in the open position shown in FIG. When a refrigerant leak is detected by the refrigerant sensor 8, this detection signal is transmitted to the control unit of the indoor unit 1 (not shown), and the stepping motor is driven by the drive signal from the control unit to cause the interlocking plate 34 to move. By horizontally moving the flap 32 in a collapsed state (see FIG. 7B), a part of the outlet 30, that is, the left and right regions of the central part where the grill 31 is disposed are closed. In this way, a part of the air outlet 30 is closed to suppress or block the blowout of conditioned air from the part, thereby increasing the wind speed compared to the normal operation in which the air outlet 30 is fully open. The conditioned air can be blown from 30. Thereby, the blowing height of the air from a floor surface can be made high, and the diffusion efficiency of a leakage refrigerant | coolant can be improved by diffusing air from the high position of living space.

  Moreover, in this embodiment, the area | region of the both ends of the rectangular blower outlet 30 is closed, and the shape of the area | region where conditioned air is blown out is made a shape nearer to a square. In other words, a part of the outlet 30 is closed such that the aspect ratio of the shape of the outlet 30 approaches 1 as compared to the shape of the outlet before leakage detection. Thus, compared to the shape of the air outlet before leakage detection, the air is blown from the rectangular air outlet having the same area by blowing air from the air outlet having a shape close to a square with an aspect ratio close to 1. Can be increased, that is, the blowing height can be increased, and the diffusion effect of the leaked refrigerant can be improved.

  FIG. 8 is a perspective view showing an appearance of an indoor unit 120 according to another embodiment of the present invention, and FIG. 9 is a front view showing the same appearance. In the following description of the indoor units according to FIGS. 8 to 12, left and right, front and rear, and top and bottom will be described along the direction indicated by the arrows in FIG. 8.

  The indoor unit 120 is a floor-standing type installed on the indoor floor. The indoor unit 120 has a long shape in the height direction (vertical direction), and the width gradually decreases from the center in the height direction to each of the upper part and the lower part. The outer surface of the indoor unit 120 is formed by a casing member 131.

  The casing member 131 is made of a synthetic resin, and mainly includes a front cover that covers the side surface from the front surface and a back cover 131b that covers the back surface from the side surface. The front cover further includes parts such as a front upper panel 131a, a front lower panel 131c, and a lower panel cover 133.

  The front upper panel 131a covers from the upper side surface of the indoor unit 120 to the upper back surface, and a vertically long rectangular hole for the air outlet Q is formed at the center in the width direction of the front surface. The front lower panel 131c covers from the lower side surface of the indoor unit 120 to the lower front surface, and a vertically long rectangular hole for the suction port P is formed at the center in the width direction of the front surface. The front lower panel 131c is also provided with holes for the suction ports P in a lattice shape at portions corresponding to both side surfaces.

  The lower panel cover 133 covers the front of the hole formed as the suction port P at the center in the width direction at the lower part of the front surface. A gap is formed between both ends of the lower panel cover 133 in the width direction and the lower front panel 131c. This gap serves as a suction port P for taking in indoor air into the indoor unit 120.

  Two vertical flaps 132 that are long in the height direction are provided above the center in the height direction on the front surface of the indoor unit 120. A blower outlet Q through which the air that has passed through the heat exchanger 121 is blown out is provided behind the two vertical flaps 132, that is, on the back side. The total width of the two vertical flaps 132 and the width of the lower panel cover 133 are the same, and the left and right ends of the two vertical flaps 132 are combined with the left and right ends of the lower panel cover 133. ing. This produces an excellent aesthetic. A recess 131d is provided in a portion of the front upper panel 131a adjacent to the air outlet Q.

  The indoor fan 122 is, for example, a sirocco fan, and is provided below the central portion in the height direction of the indoor unit 120 and is positioned behind the lower panel cover 133 and the suction port P as shown in FIG. The indoor fan 122 sucks indoor air into the indoor unit 120. The sucked air moves upward in the indoor unit 120.

  11 is a cross-sectional view taken along the line II of FIG. 8, and FIG. 12 is a cross-sectional view taken along the line II-II of FIG. The indoor air sucked into the indoor unit 120 by the indoor fan 122 moves upward in the indoor unit 120 and passes through the heat exchanger 121 shown in FIG. Air that has undergone a heat exchanger with the refrigerant when passing through the heat exchanger 121 is blown into the room through the air outlet Q. Below the heat exchanger 121, a refrigerant sensor (not shown) that detects a leaked refrigerant is disposed.

  The air outlet Q is provided above the center in the height direction of the front surface of the indoor unit 120. The air outlet Q has a rectangular shape that is long in the height direction, and is an opening from the inside of the indoor unit 120 to the room. The blower outlet Q is formed by the blower outlet formation member.

  As shown in FIG. 11, a heat exchanger 121 is disposed in the back of the air outlet Q, and a horizontal flap 134 is provided in front thereof. A vertical flap 132 is provided in front of the horizontal flap 134.

  A plurality of horizontal flaps 134 are provided in the air outlet Q side by side in the height direction. The plurality of horizontal flaps 134 are pivotally supported by rotating shafts 136 arranged in the vertical direction and extending in the horizontal direction. The plurality of horizontal flaps 134 are configured to be inclined in the horizontal direction by rotating about the rotation shaft 136 as a fulcrum.

  Two vertical flaps 132 are provided, the left side is a first vertical flap 132a, and the right side is a second vertical flap 132b. These two vertical flaps 132 are each supported by a rotation shaft 135 extending in the vertical direction, and are driven to rotate by first and second actuators (not shown) so as to be inclined in the left and right directions separately. It is configured. The vertical flap 132 adjusts the wind direction in the left-right direction by the inclination in the left-right direction. The two vertical flaps 132 are configured to be in a closed state in which the air outlet Q is closed when air is not blown out from the air outlet Q. That is, in the closed state, as shown in FIGS. 9 and 12, the first vertical flap 132 a covers the left end vicinity (left half) of the outlet Q, and the second vertical flap 132 b is the right end of the outlet Q. It is configured to cover the vicinity (right half). When the two vertical flaps 132 are in the closed state, the air outlet Q is hidden behind the vertical flap 132 and cannot be visually recognized from the outside.

  As indicated by a two-dot chain line in FIG. 12, the vertical flap 132 rotates inward from the closed state, and the air outlet Q is in an open state where the appearance can be visually recognized. Specifically, the left first vertical flap 132a rotates so that its left end moves forward and its right end moves backward. The second vertical flap 132b on the right side rotates so that its right end moves forward and its left end moves backward. In this open state, the air that has passed through the heat exchanger 121 can be blown out from the air outlet Q into the room.

  Among the plurality of horizontal flaps 134, the upper half horizontal flaps 134a are connected to each other by a connecting member 163a, and are configured to move together by being driven by a third actuator (not shown). Further, the lower horizontal flaps 134b are also connected to each other by a connecting member 163b, and are configured to move together by a fourth actuator (not shown). The plurality of horizontal flaps 134 adjusts the wind direction from the outlet Q in the vertical direction by the inclination in the vertical direction.

  Also in the embodiment according to FIGS. 8 to 12, when the refrigerant leaks, the horizontal flap 134 disposed in front of the air outlet Q (inside the room) and / or the vertical flap disposed even in front of the horizontal flap 134. By adjusting the opening / closing and opening of the flap 132 to narrow the opening, the conditioned air can be blown into the room at a higher wind speed than during normal operation, as in the above-described embodiment. Thereby, the spreading | diffusion effect of a leaking refrigerant | coolant can be improved.

[Other variations]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.
For example, in the embodiment described above, the wind speed of the conditioned air blown from the air outlet is increased by opening / closing a part of the plurality of flaps arranged at the air outlet or opening / closing the shielding plate in the floor-standing indoor unit. However, in addition to this, for example, in a ceiling-embedded indoor unit or a ceiling-suspended indoor unit that has a plurality of air outlets and a flap is disposed at each air outlet, some of the air outlets It is also possible to close a part of the air outlet of the indoor unit by closing with a flap.

  Moreover, in embodiment mentioned above, a part of blower outlet is closed by closing a flap substantially completely, For example, a wind direction can be changed with the rotatable flap arrange | positioned at the blower outlet. In the wall-mounted indoor unit, a part of the air outlet can be closed by narrowing the air outlet by adjusting the angle of the flap.

  In the above-described embodiment, the refrigerant leakage is detected by the refrigerant sensor as the refrigerant detection unit. For example, the temperature difference between the evaporator temperature and its ambient temperature or the condenser temperature A temperature difference from the ambient temperature can be obtained, and it can be determined that there is a gas shortage, that is, a refrigerant leak, when any temperature difference is less than the reference value for a predetermined time. In this case, a temperature sensor such as a thermistor constitutes the refrigerant detector in the present invention.

  Moreover, although it is the same floor-standing indoor unit, the present invention can also be applied to a floor-standing indoor unit of a type different from the indoor unit according to the embodiment described above. For example, the present invention can be applied to the floor-standing indoor unit 202 shown in FIGS. The indoor unit 202 shown in FIGS. 13 to 15 mainly includes a casing unit 250, a heat exchanger 220 and an indoor fan 221 housed in the casing unit 250. 13 and 15, reference signs X, Y, and Z indicate the left-right direction, the front-rear direction, and the vertical direction of the indoor unit 202, respectively.

  A casing unit 250 constituting the exterior of the indoor unit 202 includes a bottom frame 251, a front grill 252, and a front panel 253. As shown in FIG. 15, the internal space formed by the casing unit 250 includes a fan chamber 250A in which the heat exchanger 220, the indoor fan 221 and the like are installed, and a piping chamber 250B in which the electrical component unit 222 and the like are installed. It is divided into.

  The bottom frame 251 has a substantially rectangular shape and constitutes a back surface portion of the indoor unit 202. A pipe introduction port 251a for introducing the connection pipe into the pipe chamber 250B is provided at the lower part of the bottom frame 251.

  The front grill 252 is attached to the front side of the bottom frame 251. An upper air outlet 252 a is provided at the upper part of the front grill 252, and a lower air outlet 252 b is provided at the lower part of the front grill 252. Further, a flap 254 is rotatably provided at the upper air outlet 252a, and cool air or warm air is blown out from the upper air outlet 252a in a desired direction during the air conditioning operation, and when the air conditioning operation is stopped, the upper air outlet 252a. To cover. A substantially rectangular opening is provided in the center portion of the front grill 252. This opening is provided with a filter 255 that collects dust contained in air sucked from suction ports 253a, 253b, and 253c (see FIG. 13) of the front panel 253 described later.

The front panel 253 is attached so as to cover the opening of the front grill 252 as shown in FIG. An upper suction port 253a is provided at the upper part of the front panel 253, and a lower suction port 253b is provided at the lower part of the front panel 253. The upper suction port 253a and the lower suction port 253b are openings that are long in the width direction (X direction), and the side suction port 253c is an opening that is long in the vertical direction (Z direction). As a result, room air can be sucked in from the four directions of up, down, left, and right, and the air sucked from the suction ports 253a, 253b, and 253c is uniformly passed through the heat exchanger 220, and the upper air outlet 252a and the lower air outlet It becomes possible to blow out from 252b.
The present invention can also be suitably applied to a floor-standing indoor unit that sucks indoor air from the center and blows conditioned air from the upper and lower outlets as shown in FIGS.

DESCRIPTION OF SYMBOLS 1: Indoor unit 2: Casing 2a: Front panel 3: Heat exchanger 3a: Refrigerant tank 4: Suction port 5: Air outlet 6: Indoor fan 7: Drain pan 8: Refrigerant sensor (refrigerant detection part)
9: Motor 10: Flap 13: Wall surface 17: Rotating shaft 18: Air outlet 19: Grill 20: Shield plate 21: Motor 22: Wind speed sensor 30: Air outlet 31: Grill 32: Flap 33: Rotating shaft 34: Interlocking plate 120: indoor unit 121: heat exchanger 122: indoor fan 131: casing member 131a: front upper panel 131b: back cover 131c: front lower panel 131d: recess 132: vertical flap 132a: first vertical flap 132b: second vertical flap 133: Lower panel cover 134: Horizontal flap 135: Rotating shaft 136: Rotating shaft Q: Air outlet P: Suction port 163a: Connecting member 163b: Connecting member

Claims (5)

An air conditioner in which conditioned air heat-exchanged by a heat exchanger (3) using a slightly flammable or flammable refrigerant having a specific gravity greater than that of air is blown out indoors from an outlet (5) by an indoor fan (6). Indoor unit (1),
A refrigerant detector (8) for detecting the leaked refrigerant;
A blower opening / closing mechanism capable of closing a part of the blower outlet (5), and when the refrigerant detection unit (8) detects leakage of the refrigerant, the blower outlet (5) the drives the indoor fan (6) in a state obtained by subtracting the outlet opening area of those該吹outlet (5) than during normal operation by closing a part of,
The indoor unit (1) is a floor-standing indoor unit (1),
The air outlet (5) is a rectangular air outlet (5) formed on the upper surface of the casing (2) of the indoor unit (1),
The indoor unit (1) is disposed near the wall so that one long side of the rectangular air outlet (5) is along the wall surface,
The air outlet opening and closing mechanism, said rectangular air outlet (5) that is configured to close the portion along the long side of the wall opposite of the indoor unit of the air conditioner (1).   A plurality of flaps (10) are disposed at the air outlet (5), at least a part of the plurality of flaps (10) is an openable / closable flap (10), and the air outlet opening / closing mechanism is The indoor unit (1) for an air conditioner according to claim 1, wherein the indoor unit (1) is configured to close an openable / closable flap (10). A shielding plate (20) capable of closing a part of the air outlet (5) is provided in the air outlet (5), and the air outlet opening / closing mechanism is configured by the shielding plate (20). The indoor unit (1) of the air conditioner according to claim 1, wherein the indoor unit (1) is configured to close a part of the air conditioner. A wind speed sensor (22) is disposed in the suction port (4 ) of the indoor unit (1 ), and the air outlet opening / closing mechanism is operated when the wind speed measured by the wind speed sensor (22) is a predetermined value or less. The indoor unit (1) of the air conditioning apparatus according to any one of claims 1 to 3 , wherein the air outlet (5) is further closed. The outlet (5) has a rectangular shape,
The air outlet opening / closing mechanism closes a part of the air outlet (5) so that an aspect ratio of the shape of the air outlet (5) approaches 1 as compared with the air outlet shape before leakage detection. The indoor unit (1) of the air conditioning apparatus of any one of Claims 1-4 .