JP2008185298A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner improving heat exchange efficiency by smoothing the flow of air flowing through a heat exchanger while miniaturizing a casing. <P>SOLUTION: The air conditioner is provided with the heat exchanger 3 comprising a vertical part 3a, a rear inclined part 3b bent backward from the upper end of the vertical part, and a lower inclined part 3c bent downward from the rear end of the rear inclined part, and a blower fan 4 in an air passage having a rear guider 8 connecting a suction port 1 to a blowoff port 2. The back face side of the rear guider 8 is provided with a by-pass passage 7 having an introduction part 5 which the downstream side of the rear inclined part 3b faces, and a derivation part 6 which the air passage faces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly, to a structure that reduces the size of a casing and improves the heat exchange efficiency by smoothing the flow of air flowing through a heat exchanger.

As shown in FIG. 4 (A), the conventional air conditioner is provided with an auxiliary suction port 2a ′ to increase the total cross-sectional area of the suction port 2 ′, thereby causing abnormal noise caused by a fast suction air flow. As a result of eliminating heat generation and improving heat exchange efficiency,
A suction port 2 ′ having a filter 3 ′ is provided on the front surface and the upper surface of the main body 1 ′, an air outlet 6 ′ is provided at the lower part, and an upright portion 4 a is formed in an air passage connecting the air inlet 2 ′ and the air outlet 6 ′. And a rear inclined portion 4b 'bent upward at the upper end of the upright portion 4a' and a rear heat exchanger 4c 'bent downward at the tip of the rear inclined portion 4b'. And an air conditioner comprising a blower fan 5 ′ for sending air exchanged by the heat exchanger 4 ′ to the outlet 6 ′, and the heat exchanger at the rear of the upper surface of the main body 1 ′. A configuration in which an inclined portion 3a ′ corresponding to the rear heat exchanger 4c ′ of 4 ′ is provided and an auxiliary suction port 2a ′ is provided in the inclined portion 3a ′ is disclosed (for example, refer to Patent Document 1).

However, in the case of a model in which the air conditioner main body 1 ′ having the above-described configuration is low in height, the rear heat exchanger 4c ′ of the heat exchanger 4 ′ is used as shown in part A of FIG. On the other hand, the front end portion of the blower casing 8 ′ containing the blower fan 5 ′ is deeply penetrated upward, and for example, at least one row of the heat transfer tubes constituting the rear heat exchanger 4 c ′ of the blower casing 8 ′. Since the inclined portion 3a ′ is provided and the auxiliary suction port 2a ′ is provided in the inclined portion 3a ′, the air flow at the portion is insufficient because the structure is positioned below the tip portion. As a result, the heat exchange efficiency is lowered.
JP-A-9-229396

  Accordingly, the present invention has been made to solve the above-described problems, and its purpose is to reduce the size of the housing and to smooth the flow of air flowing through the heat exchanger, thereby improving the heat exchange efficiency. An object of the present invention is to provide an air conditioner that is improved.

  In order to achieve the above-described object, the present invention has the following features.

In an air conditioner in which a heat exchanger including a front heat exchanger and a rear heat exchanger, and a blower fan are provided in an air passage having a rear guider that connects a suction port and a blower outlet,
The rear side of the rear guider is provided with a bypass path provided with an introduction part facing the downstream side of the rear heat exchanger and a lead-out part facing the air passage.

  In addition, the introduction portion of the bypass path is provided with an open / close damper that closes the introduction portion during cooling operation and opens it during heating operation.

  According to the present invention, a bypass provided with an introduction part facing the downstream side of the rear heat exchanger and a lead-out part facing the air passage or the air outlet on the back side of the air passage centering on the blower fan By providing the passage, it is possible to provide an air conditioner that can reduce the size of the housing and improve the heat exchange efficiency by smoothing the flow of air flowing particularly through the lower part of the rear heat exchanger. .

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of an air conditioner according to the present invention, FIG. 2 is a main portion cross-sectional view showing a first embodiment of the air conditioner according to the present invention, and FIG. It is principal part sectional drawing which shows the 2nd Example.

  As shown in FIG. 1, the air conditioner according to the present invention includes an air passage having a front guider 8 a and a rear guider 8 that connect a suction port 1 and a blowout port 2 of a housing whose height dimension is kept low. A front heat exchanger comprising a filter 10, a vertical portion 3 a having a drain pan 13 at the lower portion and a rear inclined portion 3 b inclined rearward from the upper end thereof, and a downward inclination from the rear end of the rear inclined portion 3 b The heat exchanger 3 including the rear heat exchanger 3c provided with the drain pan 13 at the lower portion and the blower fan 4 are provided.

  The air sucked from the suction port 1 flows through the filter 10 and the heat exchanger 3, and then is sent out to the blowout port 2 by the blower fan 4.

  A part of the blower outlet 2 is configured by a diffuser 9 that is rotatable about a support shaft portion 9 a and deflects the wind direction in the vertical direction, so that the wind direction in the vertical direction can be deflected by the diffuser 9. I have to.

  On the rear side of the rear guider 8, a bypass path 7 including an introduction part 5 facing the downstream side of the rear heat exchanger 3 c and a lead-out part 6 facing the air passage is provided.

  The bypass path 7 is formed integrally with the base portion 12 having the rear guider 8, thereby eliminating the need for manufacturing as an individual member or assembling individual members.

  The introduction part 5 is formed with a width dimension corresponding to the width dimension of the rear heat exchanger 3c so as to face the entire downstream side width of the rear heat exchanger 3c, and the bypass path connected thereto 7 and the lead-out portion 6 are formed with the same width dimension.

  Thereby, the air sucked from the suction port 1 flows through the filter 10 and the dust contained in the air is captured, and then the front heat exchange composed of the vertical portion 3a and the rear inclined portion 3b. The air exchanged by the heat exchanger, sent to the blowout port 2 by the blower fan 4, and heat exchanged by the rear heat exchanger 3c is the blower fan as indicated by arrows a and b shown in FIG. 4 is sent to the outlet 2.

  Further, unlike the downward inclined portion (rear heat exchanger) 4c ′ in the background art described above, the upper end portion of the rear guider 8 is not obstructed by the flow of the wind, and the lower portion of the rear heat exchanger 3c is circulated. This eliminates the possibility that the air flow will be good and the heat exchange efficiency will be reduced.

  Here, based on FIG. 2 shown as Example 1, the effect | action and effect by the said bypass 7 are demonstrated in detail.

  The bypass passage 7 is configured to connect an introduction portion 5 that is an introduction port facing the downstream side of the rear heat exchanger 3c and a lead-out portion 6 that is an introduction port that faces the air passage. In addition, at the confluence of the outlet portion 6 indicated by the arrow b and the air passage indicated by the arrow a, the side of the air passage is negative with respect to the downstream side of the rear heat exchanger 3c in the vicinity of the introduction portion 5. A differential pressure that is a pressure is generated, and as a result, an air flow toward the outlet 2 as indicated by arrows a and b is generated.

  The introduction port forming the introduction portion 5 and the introduction port forming the lead-out portion 6 are configured such that both side portions thereof are connected to the base portion 12, respectively. By providing the connecting portion, the strength of the portion can be increased.

  Thus, conventionally, the air heat-exchanged by the rear heat exchanger 3c could not be sent to the outlet 2 without passing through the vicinity of the rear gap portion 11 having a stabilizer function. By providing, the flow of the air in the downstream of the said rear heat exchanger 3c becomes favorable, and ventilation performance and heat exchange performance improve.

  Further, the air flowing at a high speed along the rear guider 8 in a stationary state merges with the air led out from the lead-out unit 6 facing the rear guider 8, so that the velocity gradient at this joining point becomes gentle. Thus, the power consumption and noise (abnormal noise) of the motor driving the blower fan 4 can be reduced.

  Next, based on FIG. 3 shown as Example 2, the effect | action and effect by the said bypass 7 are demonstrated in detail.

  The bypass passage 7 has an introduction part 5 composed of a large number of air introduction holes 5 ′ facing the downstream side of the rear heat exchanger 3 c, and air derivation facing the air passage or the outlet 2. The derivation part 6 consisting of a large number of holes 6 'is connected, and at the confluence of the derivation part 6 indicated by the arrow b and the air passage indicated by the arrow a, the side of the air passage is A differential pressure that is a negative pressure is generated on the downstream side of the rear heat exchanger 3c in the vicinity of the introduction part 5, and thereby, the air flow toward the outlet 2 as indicated by arrows a and b Will occur.

  A large number of holes 5 'forming the introduction part 5 are formed in a surface facing the rear heat exchanger 3c, and a large number of holes 6' forming the lead-out part 6 join the air passage. By being constructed so as to be perforated on the surface, the strength of the portion can be further increased.

  As a result, conventionally, the air heat-exchanged by the rear heat exchanger 3c cannot be sent to the outlet 2 unless it passes through the vicinity of the rear gap 11 having a stabilizer function. As in the case of, the provision of the bypass passage 7 reduces the ventilation resistance and improves the air blowing performance and the heat exchange performance.

  Further, the air flowing at a high speed along the rear guider 8 in a stationary state merges with the air led out from the lead-out unit 6 facing the rear guider 8, so that the velocity gradient at this joining point becomes gentle. Thus, as in the case of the first embodiment described above, it is possible to reduce the power consumption and noise (abnormal noise) of the motor that drives the blower fan 4.

  As shown in FIGS. 2 and 3, the introduction portion 5 of the bypass path is provided with an open / close damper 14 that closes the introduction portion 5 during the cooling operation and opens it during the heating operation. May be.

  The opening / closing damper 14 is configured to be pivotally supported by a support shaft portion 14a, and is linked with a driving stepping motor 15 to close the introduction portion 5 during cooling operation, for example, The introduction unit 5 may be opened during operation.

  As a result, there is no risk that the condensed water generated in the front heat exchanger 3c during the cooling operation will drip onto the introduction unit 5, while the heat exchange performance by the front heat exchanger 3c is improved during the heating operation. It becomes possible to make it.

It is sectional drawing of the air conditioner by this invention. It is principal part sectional drawing which shows the 1st Example of the air conditioner by this invention. It is principal part sectional drawing which shows the 2nd Example of the air conditioner by this invention. It is explanatory drawing of the air conditioner by a prior art example, (A) is sectional drawing which shows the structure which provided the auxiliary suction port, (B) is sectional drawing of a model with a low height dimension.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake port 2 Outlet 3 Heat exchanger 3a Vertical part 3b Back inclination part 3c Rear heat exchanger 4 Blower fan 5 Introduction part 5 'Many holes 6 Outlet part 6' Many holes 7 Bypass path 8 Rear guider 8a Front guider 9 Diffuser 9a Support shaft portion 10 Filter 11 Rear gap portion 12 Base portion 13 Drain pan 14 Opening / closing damper 14a Support shaft portion 15 Stepping motor

Claims (2)

In an air conditioner in which a heat exchanger including a front heat exchanger and a rear heat exchanger, and a blower fan are provided in an air passage having a rear guider that connects a suction port and a blower outlet,
An air conditioner characterized in that a bypass path is provided on the back side of the rear guider, the bypass path having an introduction part facing the downstream side of the rear heat exchanger and a lead-out part facing the air passage. .   2. The air conditioner according to claim 1, wherein an opening / closing damper is provided at the introduction portion of the bypass path so as to close the introduction portion during cooling operation and open during heating operation.

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