JP5996980B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner that harmonizes air taken in from a suction port of a cabinet and discharges the air into the room from an air outlet.

  Conventionally, as an air conditioner of this type, Patent Document 1 discloses an internal air circulation in which an air suction port is provided at an upper front portion of a housing, an air outlet is provided at a lower portion of the front surface, and the air suction port and the air outlet are connected. An air conditioner in which a blower is disposed in a passage and a protrusion is formed on an upper wall of an air outlet is disclosed.

  In the air conditioner, it is possible to prevent a short circuit by projecting a protrusion downward from the upper wall of the air outlet.

Japanese Patent Laid-Open No. 3-211328

  However, in Patent Document 1, since there is no description of the horizontal louver itself, no consideration is given to the effect on the short circuit when the direction of the air blown from the air outlet is changed in the vertical direction by the horizontal louver. That is, in the case of Patent Document 1, when the inventor has installed a horizontal louver at the air outlet and changes the wind direction in the vertical direction, the inventor faces the horizontal louver downward to blow the wind downward from the air outlet. The conditioned air flows out from between the side louver and the upper wall of the air outlet to the front of the housing, and at least a part of the air is sucked into the air inlet, which may cause a short circuit. I found it.

  When a short circuit occurs, an accurate temperature cannot be detected by a thermistor that detects the temperature of the indoor air sucked from the suction port, so that an appropriate air conditioner cannot be operated, and the cooling / heating capacity is reduced.

  Then, this invention aims at provision of the air conditioner which can suppress a short circuit even when the direction of the conditioned air which blows off from a blower outlet is changed to an up-down direction.

  In order to achieve the above object, an air conditioner according to the present invention includes an indoor heat exchanger in a cabinet, a suction port is provided in the cabinet, and the indoor air sucked from the suction port is an indoor heat exchanger. The air conditioner is harmonized through and discharged from an air outlet formed in the front lower part of the cabinet, and a horizontal louver is provided at the air outlet so as to be openable and closable, and the suction port is located above the air outlet. A protrusion is provided on the upper wall of the air outlet, and when the conditioned air is blown downward from the air outlet, the lower end of the lateral louver is brought close to the protrusion so that the air It is possible to reduce the distance from the louver and the protrusion to the suction port.

  According to the above configuration, when guiding the conditioned air blown out from the outlet with the horizontal louver inclined downward, the conditioned air that has passed through the gap between the horizontal louver and the upper wall of the outlet is sucked into the suction port. It becomes possible to suppress the circuit. Thereby, the temperature of the indoor air sucked from the suction port can be accurately detected, and an appropriate operation is possible. When making the lower end part of a horizontal louver approach a projection part, a horizontal louver lower end part and a projection part may be made to contact, and a crevice may exist between both in the range which can reduce a short circuit.

  When conditioned air is blown downward from the air outlet, the lower end of the horizontal louver and the tip of the protrusion may be close to each other, but the horizontal louver is arranged so as to partially overlap the protrusion in the blowing direction. It is also possible to adopt the configuration described above. As a result, even if there is a slight gap between the lower end of the horizontal louver and the protrusion, the gap is bent, so that the passage of conditioned air is restricted and the short circuit is effectively suppressed. Can do.

  When the conditioned air is blown downward from the air outlet, the lower end of the horizontal louver is positioned upstream of the protrusion in the air blowing direction, that is, the lower end of the horizontal louver is in the air blowing direction of the protrusion. If it is close to the upstream surface, the upper wall of the outlet will reduce the momentum of conditioned air at the inlet of the gap even if there is a slight gap between the lower end of the horizontal louver and the protrusion. Since it is formed at the position, the short circuit can be more effectively suppressed.

  As described above, according to the present invention, when conditioned air is blown downward from the air outlet, the gap between the horizontal louver and the upper wall of the air outlet is reduced by bringing the lower end of the horizontal louver closer to the protrusion. It becomes possible to reduce the short circuit in which the conditioned air that has passed is sucked into the suction port.

The external appearance front view which shows the closed attitude | position of a horizontal louver in the indoor unit of the air conditioner which concerns on this invention Side sectional view of FIG. Side sectional view showing the front blowing posture of the horizontal louver in the same indoor unit The partial side sectional view showing the downward blowing posture of the horizontal louver in the indoor unit Partial side sectional drawing which shows the downward blowing attitude | position of the horizontal louver which is another embodiment

  Embodiments according to the present invention will be described with reference to the drawings. In this embodiment, an indoor unit of a separate type air conditioner will be described as an example. This type of air conditioner includes an indoor heat exchanger housed in an indoor unit, a compressor, a four-way valve, an outdoor heat exchanger, and a throttle device (both not shown) housed in an outdoor unit (not shown). Are connected by a refrigerant pipe to constitute a refrigeration cycle, and various operation modes such as cooling, heating and dehumidification can be executed.

  As shown in FIG. 1 and FIG. 2, the indoor unit has a suction port 2 that sucks room air into the upper surface of the cabinet 1. A grid-like suction grill 11 is formed at the suction port 2 portion of the cabinet 1. Note that the suction port 2 may be formed on the upper surface of the cabinet 1 in addition to being formed on the upper surface of the cabinet 1, or may be formed on both the upper front surface and the upper surface of the cabinet 1.

  An outlet 4 is formed below the front surface of the cabinet 1. When the cabinet 1 is viewed from the front, the width direction is the left-right direction X, the height direction of the cabinet is the vertical direction Y, and the depth direction of the cabinet 1 is the front-back direction Z.

  In the cabinet 1, as shown in FIG. 2, an air passage 5 extending from the suction port 2 to the blowout port 4 is formed. The filter 3, the indoor heat exchanger 6, and the air passage 5 are formed in the air passage 5 from the upstream side in the blowing direction A. Fans 7 are arranged in this order. A temperature sensor 8 that detects the temperature of the indoor air sucked from the suction port 2 is attached to the upstream surface of the heat exchanger 6 in the blowing direction.

  In the indoor heat exchanger 6, two heat exchangers, a front side heat exchanger 6a and a back side heat exchanger 6b, are arranged in an inverted V shape, and a drain pan 9 is disposed below the front side heat exchanger 6a. Is arranged to receive drain water generated by the heat exchanger 6. Furthermore, a stabilizer 12 is attached to the lower surface of the drain pan 9.

  The fan 7 is a cross flow fan and is disposed in a space surrounded by the indoor heat exchanger 6 on the downstream side of the air passage 5. In the air passage 5, the downstream side of the fan 7 is constituted by a rear guider 10 and a stabilizer 12, and the air blown from the fan 7 is guided to the outlet 4 at the lower front portion of the cabinet 1.

  More specifically, the rear guider 10 is formed in a concave curved surface and functions as a blowing guide wall from the rear guide wall of the fan 7 to the lower wall 4b of the blower outlet, and the stabilizer 12 blows from the front guide wall of the fan 7. It functions as a blowing guide wall that reaches the upper wall 4a of the outlet. A protrusion 13 is formed on the lower surface of the stabilizer 12. The protrusion 13 extends in the entire width direction (left-right direction) of the air outlet 4 as a protrusion having a tapered shape and a triangular cross section in the front-rear direction.

  A front opening 1a is formed on the front surface of the cabinet 1 so as to face the front heat exchanger 6a. A front cover 14 is detachably attached to the cabinet 1 so as to cover the front opening 1a. The filter 3 can be removed from the front surface of the cabinet 1 by opening the front cover 14. The front cover 14 has a flat plate shape, the width in the left-right direction is substantially equal to the horizontal width of the cabinet 1, and the height is set to cover the front opening 1a of the cabinet.

  In the lower part of the front side of the cabinet 1, the lower side of the front cover 14 recedes in an arc shape in a side view and reaches the bottom wall part 15. A horizontal louver 17 is provided in front of the blower outlet 4 so as to be capable of opening and closing around the horizontal axis 16 and is arranged swingably on the lower wall 4b of the blower outlet on the rear side (upstream side in the blowing direction) of the horizontal louver 17. A plurality of vertical louvers 18 are provided. The lateral louver 17 is disposed in front of the air outlet 4 and forms a part of the appearance of the cabinet 1 in a closed posture, and thus has a shape curved in an arc shape in a side view.

  The horizontal louver 17 is controlled to rotate by a control unit (not shown). More specifically, the control unit includes a microcomputer, and drives and controls a compressor and the like (not shown) in addition to the lateral louver 17 and the fan 7. The control unit is built in the cabinet 1 and executes various operations such as air conditioning operation, dehumidifying operation, ventilation operation, the rotational speed of the fan 7 and the horizontal louver 17 in response to an operation signal from a remote controller or an operation switch provided in the cabinet. Control the direction of the.

  The horizontal louver 17 is shown in FIG. 3 through an upward blowing posture in which conditioned air is blown upward by rotating the upper end of the horizontal louver 17 forward around the horizontal axis 16 from the closed posture shown in FIGS. Thus, the front blowing posture which blows conditioned air forward is taken. The upper end of the horizontal louver 17 is the upper end of the horizontal louver in the closed posture, and the lower end of the horizontal louver 17 is the lower end of the horizontal louver in the closed posture.

  When the upper end of the horizontal louver 17 is further rotated downward from the front blowing posture, as shown in FIG. 4, the lower blowing that blows the conditioned air discharged from the blower outlet 4 obliquely downward using the front surface of the horizontal louver 17. Take a posture. Thus, the horizontal louver 17 can be opened and closed between the closed posture and the downward blowing posture.

  In the air conditioner having the above configuration, when the conditioned air is blown out with the horizontal louver 17 in the forward blowing posture, the conditioned air flowing in the direction of the blowing direction A along the upper wall 4a of the outlet is as shown in FIG. By colliding with the protrusion 13, as shown by the black arrow, it peels from the blower outlet upper wall 4 a and is sent to the front of the blower outlet 4. Thereby, a short circuit can be reduced.

  When the conditioned air is blown out with the horizontal louver 17 in the downward blowing posture, the outer surface of the horizontal louver 17 faces the upstream side with respect to the blowing direction A as shown in FIG. As described above, the lateral louver 17 is curved in an arc shape when viewed from the side. Therefore, when the lateral louver 17 takes a downward blowing posture, the lateral louver 17 is curved convexly toward the upstream side. Formation.

  At this time, since the lateral louver 17 is inclined more greatly with respect to the blowing direction A as it goes to the lower end portion, the resistance received from the conditioned air flowing through the air passage is also increased. Therefore, when there is a sufficient gap between the lower end portion of the horizontal louver 17 and the upper wall 4a of the outlet, the amount of conditioned air flowing out of the outlet 4 through the gap increases, and the cabinet The possibility that a short circuit that flows along the front surface of 1 or in the vicinity thereof and is sucked into the suction port 2 will increase.

  On the other hand, in this embodiment, as shown in FIG. 4, the lower end of the horizontal louver 17 is in contact with the protrusion 13, so the conditioned air flowing along the upper wall 4 a of the outlet is forcibly changed direction. And discharged downward from the air outlet 4. Thereby, a short circuit can be reduced.

  The change of the posture of the horizontal louver 17 between the closed posture and the downward blowing posture can be performed stepwise or continuously by an operation signal input to the control unit from an operation switch provided on the remote controller or the cabinet.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention. For example, in FIG. 4, the mode in which the lower end portion of the horizontal louver 17 is in contact with the tip end of the protruding portion 13 during the downward blowing is described. However, the present invention is not limited to this, and as shown in FIG. Thus, a gap may exist between the horizontal louver 17 and the protrusion 13.

  In other words, in the embodiment shown in FIG. 5, the lower louver 17 is disposed such that the lower end portion thereof is located upstream of the projection portion 13 in the blowing direction A and the lateral louver 17 partially overlaps the projection portion 13 in the blowing direction A. It is assumed to be configured.

  Even if a gap is formed between the lower end portion of the lateral louver 17 and the upper wall 4a and the protrusion 13 of the blower outlet, the upper wall of the blower outlet where the momentum of the conditioned air becomes weakest at the inlet of the gap. 4a, and the gap is bent as shown by the dashed-dotted arrow in FIG. 5, the conditioned air passing through the gap receives a large resistance, and the harmony passing through the gap. Air volume is limited. Thereby, a short circuit can be suppressed effectively.

  In the present embodiment, the protrusion 13 is formed on the lower surface of the stabilizer 12. However, the present invention is not limited thereto, and the protrusion 12 may be provided on the lower surface of the drain pan 9 without providing the stabilizer 12. Furthermore, in this embodiment, although the projection part 13 is provided in the whole width direction of the blower outlet 4, you may form in a part of the width direction of the blower outlet 4 in the range which can reduce a short circuit. .

  Further, in FIG. 4, the mode in which the lower end portion of the horizontal louver 17 is in contact with the tip of the protruding portion 13 during the downward blowing is described. However, the horizontal louver 17 is further rotated counterclockwise to The lower end of the horizontal louver 17 may be positioned forward (downstream in the blowing direction). As a result, the wind whose direction is changed by the protrusion 13 is guided downward along the horizontal louver 17, and the gap between the horizontal louver 17 and the upper wall 4 a of the outlet is the protrusion as viewed from the upstream side in the blowing direction. Since it is hidden by 13, the wind leaking through the gap can be reduced.

DESCRIPTION OF SYMBOLS 1 Cabinet 1a Front opening 2 Inlet 3 Filter 4 Outlet 4a Top wall 4b Outlet bottom wall 5 Air passage 6 Indoor heat exchanger 6a Front side heat exchanger 6b Rear side heat exchanger 7 Fan 8 Temperature sensor 9 Drain pan 10 Rear guider 11 Suction grill 12 Stabilizer 13 Protrusion 14 Front cover 15 Bottom wall 16 Horizontal shaft 17 Horizontal louver 18 Vertical louver

Claims (3)

  An indoor heat exchanger is installed in the cabinet, a suction port is provided in the cabinet, and the indoor air sucked from the suction port is harmonized through the indoor heat exchanger and is formed from a blower outlet formed at the front lower part of the cabinet. An air conditioner that is released and has a lateral louver that can be opened and closed at the air outlet, wherein the air inlet is provided above the air outlet, and a protrusion is provided on the upper wall of the air outlet, When the conditioned air is blown downward from the air outlet, the lower end of the horizontal louver is brought close to the protrusion, and the conditioned air passes between the horizontal louver and the protrusion and moves toward the suction port. Reduced air conditioner.   2. The air conditioner according to claim 1, wherein when the conditioned air is blown downward from the air outlet, the lateral louver is disposed so as to partially overlap the protrusion in the air blowing direction.   3. The air conditioner according to claim 2, wherein when conditioned air is blown downward from the air outlet, the lower end portion of the lateral louver is positioned upstream of the protrusion in the air blowing direction.

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