JP4524253B2 - Air conditioner - Google Patents

Description

  The present invention generally relates to an air conditioner, and more particularly to an air conditioner including a heat exchanger having heat transfer fins that make a wind speed distribution uniform with a simple structure.

  In recent years, in air conditioners, heat exchangers are formed without gaps in limited-size indoor units so as not to impair the design as efficiency increases due to the effects of energy-saving regulations. It has become necessary. As a result, the design is diversified, such as arranging heat exchangers before and after the blower or forming them in an arc shape.

  In addition, in the indoor unit, the heat exchanger is stored without a gap, and an air purifier and various filters are arranged to improve the function, or a part of the suction grill or the Since the area of the air intake port is limited by the fact that most of the panels are made, the amount of air supplied to the indoor unit is not uniform with respect to the heat exchanger, resulting in the wind speed distribution of the heat exchanger. There is a difference.

  Conventionally, in order to improve the heat exchange performance of the air conditioner, a cut-and-raised portion extending perpendicular to the airflow direction has been provided on the surface of the heat transfer fin of the heat exchanger. For example, FIG. 17 is a plan view of the heat transfer fin 50 in the heat exchanger of the conventional air conditioner described in JP 2000-249484 A, and FIGS. 18 and 19 are respectively XVIII of FIG. It is sectional drawing which follows a -XVIII line and a XIX-XIX line. In FIG. 17, a pair of through holes 51 are arranged on the heat transfer fins 50 in a direction B perpendicular to the airflow direction A, and a heat transfer tube 53 for passing a refrigerant is inserted into each of the through holes 51. The As clearly shown in FIG. 19, each through hole 51 has a boss 52. In FIG. 17, three cut-and-raised portions 55 extending in the direction B perpendicular to the airflow direction A are arranged between the pair of heat transfer tubes 53 so as to improve the heat exchange performance. It is juxtaposed to A. Each of the cut-and-raised parts 55 is obtained by forming two slits in parallel in the heat transfer fin 50 in the direction B perpendicular to the airflow direction A and bulging the part sandwiched between the slits. . As shown in FIG. 18, each of the cut-and-raised portions 55 has a through hole 55a that opens in the airflow direction A. On the other hand, in the direction B perpendicular to the airflow direction A as shown in FIG. It is formed by a roof-shaped bulge portion having a pair of inclined leg portions 55c and 55b, and is closed.

  In the heat exchanger of the conventional air conditioner having the above configuration, since the cut-and-raised portion 55 is provided in the entire heat exchanger, the amount of air supplied to the indoor unit as described above is relative to the heat exchanger. If not uniform, there is a problem that wind noise may occur due to the non-uniform distribution of air passing through the heat exchanger, and sufficient heat exchange performance cannot be obtained, so that the quality may be deteriorated.

  Conventionally, in order to suppress the generation of noise such as wind noise, a method of additionally providing a baffle plate or crushing a part of the heat transfer fins of the heat exchanger makes the wind speed distribution uniform. Methods are also known, but these known methods cause a problem that production costs increase due to an increase in the number of parts and the number of production steps.

  In order to solve the above-described problems of the prior art, an object of the present invention is to provide an air conditioner that reduces noise with an inexpensive and simple structure while maintaining heat exchange performance substantially the same as that of a conventional one. And

In order to achieve the above object, an air conditioner of the present invention includes a plurality of heat transfer fins each having a plurality of through holes, and a plurality of heat transfer tubes that are inserted through the through holes of the heat transfer fins and allow the refrigerant to pass therethrough. Including a heat exchanger and a blower that supplies air to the heat exchanger, and a plurality of protrusions that are closed in the direction of the airflow going to the heat exchanger and obstruct the airflow , the wind speed of the wind speed distribution of the heat exchanger in the not fast region, while provided on the surface of the heat transfer fins between the heat transfer tubes so as to improve heat exchange performance, a plurality of cut-and-raised portion for guiding a direction to open the air flow of the air flow going to the heat exchanger and in late it has regions of wind speed air velocity distribution of the heat exchanger, provided on the surface of the heat transfer fins between the heat exchanger tubes.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows an air conditioner indoor unit according to a first embodiment of the present invention. This indoor unit has an indoor unit main body 1. The indoor unit main body 1 fixes a heat exchanger 3 and the like, and forms a chassis 1a that forms the back surface of the indoor unit main body 1 and a front surface of the indoor unit main body 1. And a front panel 2 having a large number of ventilation holes 2a. The blower 5 sucks indoor air from the vent hole 2 a of the front panel 2 and discharges the heat-exchanged air from the blower outlet 4 into the room. The heat exchanger 3 includes a large number of heat transfer fins 10 each having a plurality of through holes 11 and a plurality of heat transfer tubes 13 that are inserted through the through holes 11 of the heat transfer fins 10 and allow the refrigerant to pass therethrough. The fins 10 are juxtaposed at predetermined intervals in the axial direction of the heat transfer tube 13. As clearly shown in FIG. 4, a boss 12 for holding each heat transfer tube 13 is provided in each through hole 11. In addition, two water trays 8 for receiving condensed water adhering to the heat exchanger 3 as waste water are provided below the front end portion and the rear end portion of the heat exchanger 3, respectively. In addition, the air suction port that can be freely opened and closed may be provided in the front panel 2 instead of the ventilation hole 2a, and the air suction port may be opened during operation to suck indoor air.

In the air conditioner indoor unit of the present invention, the projecting portion 14 to prevent the air flow (FIGS. 2 to 4) is, while provided in yet fast area of wind speed air velocity distribution of the heat exchanger 3, to improve the heat exchange performance cut and raised portion 15 (FIGS. 5 to 7) is provided to the delay have areas of wind speed air velocity distribution of the heat exchanger 3. For example, while the wind velocity of the top 3A of the heat exchanger 3 may have faster than the wind speed at the bottom 3B of the heat exchanger 3, the projecting portion 14 to prevent the air flow is provided in the upper portion 3A of the heat exchanger 3 in Figure 1, heat exchanger A cut-and-raised portion 15 that improves performance is provided in the lower portion 3B of the heat exchanger 3. However, the above arrangement in which the protruding portion 14 and the cut-and-raised portion 15 are provided on the upper part 3A and the lower part 3B of the heat exchanger 3, respectively, is only given as an example, and the indoor unit for an air conditioner of the present invention Needless to say, the arrangement is not limited to this.

The protrusion 14 that blocks the airflow and the cut-and-raised portion 15 that improves the heat exchange performance will be described below. First, to prevent the air flow, in yet fast region of wind speed air velocity distribution of the heat exchanger 3 for protrusions 14 provided on the surface of the heat transfer fins 10 between the heat transfer tubes 13 with reference to FIGS. 2 to 4 explain. As shown in FIG. 2, the pair of heat transfer tubes 13 are arranged in the direction B perpendicular to the airflow direction A, while the projecting portion 14 is arranged between the pair of heat transfer tubes 13. It extends in the direction B perpendicular to the direction A. As shown in FIG. 3, in the airflow direction A, the protrusion 14 is formed by a roof-shaped bulging portion having a horizontal portion 14a and a pair of inclined leg portions 14b, and is closed in FIG. As shown, it has a through-hole 14c that opens in a direction B perpendicular to the direction A of the airflow. Accordingly, in yet fast region of wind speed velocity distribution of the heat transfer fins 10 of the heat exchanger 3, the projecting portion 14 which is closed in the direction A of the air flow as described above, prevent the air flow traveling in the direction A.

Next, as to improve the heat exchange performance, to 5 for cut-and-raised portion 15 provided on the surface of the heat transfer fins 10 between the heat transfer tubes 13 in the late have regions of wind speed air velocity distribution of the heat exchanger 3 This will be described with reference to FIG. The cut and raised portion 15 is the same as the conventional cut and raised portion 55 shown in FIGS. Therefore, as shown in FIG. 5, the pair of heat transfer tubes 13 are arranged in the direction B perpendicular to the airflow direction A, while the three cut-ups extending in the direction B perpendicular to the airflow direction A. The part 15 is juxtaposed in the airflow direction A between the pair of heat transfer tubes 12. Each of the cut-and-raised portions 15 is obtained by forming two slits in the heat transfer fin 10 in parallel in a direction B perpendicular to the airflow direction A and bulging a portion sandwiched between the slits. . Each of the cut-and-raised portions 15 has a through hole 15a that opens in the airflow direction A as shown in FIG. 6, while in the direction B perpendicular to the airflow direction A as shown in FIG. It is formed by a roof-shaped bulge having a pair of inclined legs 15c and 15b, and is closed. Thus, in the late have regions of wind speed velocity distribution of the heat transfer fins 10 of the heat exchanger 3, cut-and-raised portion 15 which is open in the direction A of the air flow as described above, guides the airflow traveling in the direction A Therefore, heat exchange of the heat exchanger 3 is promoted.

  8 to 10 show a heat transfer fin 10 'which is a first modification of the heat transfer fin 10 of the heat exchanger 3 of FIG. In the heat transfer fin 10 ′ in FIG. 8, the three protrusions 14 ′ that block the airflow are juxtaposed in the airflow direction A between the pair of heat transfer tubes 13, and the direction perpendicular to the airflow direction A In step B, it is offset stepwise so that it gradually descends from the inflow side of the airflow. Similar to the protrusion 14 of FIGS. 2 to 4, the protrusion 14 ′ is a roof-shaped bulge having a horizontal portion 14a ′ and a pair of inclined leg portions 14b ′ in the airflow direction A, as shown in FIG. While being formed and closed by the protruding portion, as shown in FIG. 10, it has a through hole 14 c ′ that opens in a direction B perpendicular to the airflow direction A.

  11 to 13 show a heat transfer fin 10 ″ which is a second modification of the heat transfer fin 10 of the heat exchanger 3 of FIG. 2. In the heat transfer fin 10 ″ of FIG. It is formed of an upright plate-like piece that crosses the airflow to the heat exchanger 3. As shown in FIGS.11 and 12, the plate-like protrusion 14 ″ is disposed on the airflow inflow side of the rectangular opening 14a ″. ing.

The operation of the air conditioner indoor unit configured as described above will be described below. First, when the operation of the indoor unit is started, the blower 5 rotates and sucks indoor air from the ventilation holes 2 a of the front panel 2. The air is heat-exchanged when passing through the heat exchanger 3 and is discharged into the room from the outlet 4 by the blower 5. At this time, the heat transfer fins 10 in that is faster areas of wind speed air velocity distribution of the heat exchanger 3, the projecting portion 14 which is closed in the direction A of air flow, so prevents the airflow traveling in the direction A, substantially uniform velocity distribution is It becomes. As a result, unlike conventional methods that increase the production cost by adding additional baffle plates or crushing some of the heat transfer fins of the heat exchanger, noise due to uneven wind speed distribution with an inexpensive and simple structure Can be suppressed.

On the other hand, the heat transfer fins 10 in the late have regions of wind speed air velocity distribution of the heat exchanger 3, cut-and-raised portion 15 which is open in the direction A of air flow, so to guide the airflow traveling in the direction A, the heat exchanger Since the heat exchange of the vessel 3 is promoted, the heat exchange performance is maintained at substantially the same level as the conventional one.

(Embodiment 2)
14 to 16 illustrate the heat transfer fins 20 in that is faster areas of wind speed air velocity distribution of the heat exchanger 3 of the air conditioner indoor unit according to a second embodiment of the present invention. In the heat transfer fin 20 of FIG. 14, a tubular protrusion 24 that prevents airflow is provided between the pair of heat transfer tubes 13. As shown in FIGS. 15 and 16, the tubular projecting portion 24 has substantially the same shape as the boss 12 of the through hole 11.

  By using the tubular protrusion 24 having substantially the same shape as the boss 12 of the through hole 11, the mold structure of the heat transfer fin 20 is simplified, and the tubular protrusion 24 is formed in the through hole 11. Since it can form simultaneously in a process, the heat-transfer fin 20 can be manufactured further cheaply.

As is clear from the above description, the air conditioner of the present invention has the following remarkable effects. First, cut and bent portion provided on the surface of the heat transfer fins between the heat transfer tube in a slow yet area wind speed air velocity distribution of the heat exchanger, by promoting the heat exchange of the heat exchanger, the heat exchange performance while maintaining substantially the same level as the conventional, protruding portions provided on the surface of the heat transfer fins between the heat transfer tube in a not fast region of wind speed air velocity distribution of the heat exchanger prevents airflow to the heat exchanger As a result, the wind speed distribution is made substantially uniform, so that the generation of noise due to non-uniform wind speed distribution can be suppressed with an inexpensive and simple structure.

  In the air conditioner of the present invention, if a tubular projecting portion having substantially the same shape as the boss shape of the through hole is used as the projecting portion that obstructs airflow in the heat transfer fin of the heat exchanger, the mold of the heat transfer fin is used. Since the structure is simplified and the tubular protrusion can be formed simultaneously during the process of forming the through hole, the heat transfer fin can be manufactured at a lower cost.

It is a schematic sectional drawing of the indoor unit for air conditioners concerning Embodiment 1 of this invention. It is a partial plan view of the heat transfer fins in the not fast region of wind speed air velocity distribution of the heat exchanger of an air conditioner indoor unit of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. Is a partial plan view of the heat transfer fins in the late have regions of wind speed air velocity distribution of the heat exchanger of Figure 1. It is sectional drawing which follows the VI-VI line of FIG. It is sectional drawing which follows the VII-VII line of FIG. It is a partial top view of the heat-transfer fin which is the 1st modification of the heat-transfer fin of FIG. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. It is a fragmentary top view of the heat-transfer fin which is the 2nd modification of the heat-transfer fin of FIG. It is sectional drawing which follows the XII-XII line | wire of FIG. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is a partial plan view of the heat transfer fins in the not fast region of wind speed air velocity distribution of the heat exchanger of an air conditioner indoor unit according to a second embodiment of the present invention. It is sectional drawing which follows the XV-XV line | wire of FIG. It is sectional drawing which follows the XVI-XVI line of FIG. It is a partial top view of the heat-transfer fin of the heat exchanger of the conventional air conditioner. It is sectional drawing which follows the XVIII-XVIII line of FIG. It is sectional drawing which follows the XIX-XIX line | wire of FIG.

DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Front panel 3 Heat exchanger 4 Outlet 5 Air blower 8 Water receiving tray 10 Heat transfer fin 11 Through-hole 12 Boss 13 Heat transfer tube 14 Protrusion 15 Cutting part

Claims (4)

A heat exchanger including a plurality of heat transfer fins each having a plurality of through holes, a plurality of heat transfer tubes that are inserted through the through holes of the heat transfer fins and allow the refrigerant to pass through, and a blower that supplies air to the heat exchanger provided with a bets is closed in the direction of the air flow going to the heat exchanger a plurality of protrusions that prevent airflow, in yet fast region of wind speed air velocity distribution of the heat exchanger, the surface of the heat transfer fins between the heat transfer tube while providing a so as to improve heat exchange performance, a plurality of cut-and-raised portion for guiding the opening in the direction of the air flow going to the heat exchanger airflow, in late it has regions of wind speed air velocity distribution of the heat exchanger, An air conditioner provided on the surface of a heat transfer fin between heat transfer tubes. Each protrusion, the air conditioner according to claim 1, characterized by forming in closed roof-shaped bulge portion in the direction of the air flow to the heat exchanger. Each protrusion air conditioner according to claim 1, wherein a formed in upright plate-like pieces across the air flow to the heat exchanger. The air conditioner according to claim 1, wherein each protrusion has a shape substantially the same as the shape of the boss of each through hole.

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