JP2011106777A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress abnormal noise (whistling noise) generated by wind made to flow along the upwind side surface of a heat exchanger in the width direction of the heat exchanger without increasing the size. <P>SOLUTION: The upwind side surface of the heat exchanger 8 includes: a first wind guide plate 15 guiding wind made to change the orientation by wind guide resistance and to flow along the upwind side surface of the heat exchanger 8 to the heat exchanger width direction out of wind hitting the heat exchanger 8 to the direction vertical to the heat exchanger 8; and a second wind guide plate 16 guiding wind made to flow over the first wind guide plate 15 and to further flow along the upwind side surface of the heat exchanger 8 in the heat exchanger width direction in the direction vertical to the heat exchanger 8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air conditioner in which a heat exchanger is disposed on a blower side of a blower.

  In an air conditioner in which a heat exchanger is arranged on the blower side of the blower, a part of the wind that hits the heat exchanger is exchanged along the windward surface of the heat exchanger by the wind guide resistance of the heat exchanger. There was a possibility that a whistling sound (abnormal sound) was generated by this flow. In particular, when a heat exchanger having a width that is longer than the main flow range of the air blown by the blower is disposed, the generation of whistling noise due to the wind flowing in the direction of the heat exchanger that is out of the main flow range of the blow is noticeable. In order to suppress this whistling sound, various types of wind guide plates have been proposed.

  Specifically, in an air conditioner in which a heat exchanger longer than the width dimension of the main flow range of the blower is disposed on the discharge side of the blower, the leeward side edge is obliquely forward of the main flow range of the blower and the windward side of the heat exchanger There is one in which an air guide plate separated from the edge is provided (for example, see Patent Document 1).

  In addition, on the lower surface of the indoor unit body embedded in the ceiling surface, a suction port is provided in the center, and a blower that blows air sucked from the suction port to the outer periphery is provided above the suction port. In an air conditioner in which a heat exchanger is disposed, a plurality of substantially baffle-shaped air guide plates parallel to each other and inclined in the direction opposite to the rotation direction of the blower on the windward surface of the heat exchanger on the four sides around the blower (For example, refer to Patent Document 2).

Japanese Unexamined Patent Publication No. 03-36432 (pages 2 and 3, FIGS. 1 to 3) JP 2001-994336 A (pages 2 and 3, FIGS. 2 to 4)

  However, in the case where the air guide plate is provided apart from the heat exchanger in the air path between the blower and the heat exchanger, the distance (space) for providing the air guide plate between the fan and the heat exchanger ) Must be ensured, and there is a problem of increasing the size of the air conditioner. This wind guide plate is far from the source of the whistling sound caused by the wind flowing on the surface of the heat exchanger, and contributes to some extent to the countermeasure against the whistling sound, but is less effective. Furthermore, when the installation space is limited, it becomes difficult to install.

  In addition, on the windward surface of the heat exchanger installed on the four sides around the blower that blows out the sucked air to the outer periphery, each provided with a plurality of wind guide plates inclined in the direction opposite to the rotation direction of the blower The air from the blower is always blown obliquely with respect to the heat exchanger, and a part of the wind hitting the heat exchanger is caused by the air flow resistance of the heat exchanger. It was not a measure against abnormal noise generated by flowing in the width direction of the heat exchanger along the windward surface, and was not intended to pay attention to the height of the air guide plate and the interval between the air guide plates.

  The technical problem of the present invention is to make it possible to suppress abnormal sounds (whispering sounds) generated by wind flowing in the width direction of the heat exchanger along the windward surface of the heat exchanger without increasing the size. is there.

  The air conditioner according to the present invention has the following configuration. That is, an air conditioner in which a heat exchanger longer than the width dimension of the main flow range of the blower is arranged on the blowout side of the blower, provided on the windward surface of the heat exchanger, and out of the wind hitting the heat exchanger A first wind guide plate for directing the wind, which is changed in direction by the wind guide resistance and flows in the heat exchanger width direction along the windward surface of the heat exchanger, in a direction perpendicular to the heat exchanger, and the heat exchanger A second wind guide which is provided on the windward surface of the heat exchanger and which flows over the first air guide plate and further flows in the heat exchanger width direction along the windward surface of the heat exchanger in a direction perpendicular to the heat exchanger. A wind guide plate.

  According to the air conditioner of the present invention, the direction of the wind that hits the heat exchanger that is longer than the width of the main flow range of the blower is changed by the wind guide resistance, and along the windward surface of the heat exchanger. The wind flowing in the width direction of the heat exchanger is guided in a vertical direction with respect to the heat exchanger in two stages by the first air guide plate and the second air guide plate provided on the windward side surface of the heat exchanger. Therefore, the whistling sound can be efficiently suppressed without increasing the size.

It is a longitudinal section showing the air harmony machine concerning one embodiment of the present invention from the side. It is a cross-sectional view which shows the air conditioner which concerns on one embodiment of this invention from upper direction. It is a schematic diagram of the baffle plate installation part of the heat exchanger of the air conditioner which concerns on one embodiment of this invention. It is a schematic diagram for demonstrating the item of the baffle plate of the air conditioner which concerns on one embodiment of this invention. It is the side view, front view, and top view which show the baffle plate of the air conditioner which concerns on one embodiment of this invention.

The present invention will be described below with reference to illustrated embodiments.
FIG. 1 is a longitudinal sectional view showing an air conditioner according to an embodiment of the present invention from the side, and FIG. 2 is a transverse sectional view showing the air conditioner according to an embodiment of the present invention from above.

  In the air conditioner of the present embodiment, the fan 3, the fan casing 4, and the heat exchanger 8 are housed inside the cabinet 1 of the indoor unit that opens downward. Further, a decorative panel 12 provided with a suction grill 13 and an air outlet 10 facing the air-conditioned space is attached to the lower surface of the cabinet 1. Then, in the partition plate 6 provided on the blowing side of the fan casing 4, the inside of the cabinet 1 has a suction side air passage 9 a through which air sucked from the suction port 2 flows to the fan 3, and air blown from the fan 3 A blow-out side air passage 9 b that flows from the vent 7 of the fan casing 4 through the heat exchanger 8 to the outlet 10 is defined. The blower outlet 10 is provided with a wind direction plate 14 that changes the blowing direction of air.

  A drain pan 11 that receives drain water that is condensed and dripped by the heat exchanger 8 is provided at a lower portion of the heat exchanger 8. The drain water collected in the drain pan 11 is drained using a drain pump (not shown). It is designed to drain to the outside.

  Such an indoor unit heat exchanger 8 is connected to a compressor, an outdoor heat exchanger, an expansion device and a closed loop provided in the outdoor unit by refrigerant pipes of a liquid pipe and a gas pipe, and constitutes a refrigerant circuit. Yes. A four-way valve that changes the flow direction of the refrigerant is provided in the refrigerant circuit, so that the cooling operation and the heating operation can be performed in a reverse cycle. The expansion device necessary for the refrigeration cycle may be disposed on the outdoor unit side or may be provided in the vicinity of the heat exchanger 8 of the indoor unit. In a multi-type air conditioner, it is advantageous to take a form in which an expansion device is arranged on the indoor unit side.

  The heat exchanger 8 is a fin-and-tube type in which a copper pipe through which a refrigerant flows is passed through a plurality of laminated fins. That is, the heat exchanger 8 includes a plurality of fins arranged in parallel in the width direction of the cabinet 1 and a staggered copper pipe penetrating through the fins 3, and a plurality of fans 3 connected via an electric motor 5 as shown in FIG. The air blown out from the fan 3 hits the heat exchanger 8 and is installed so as to go to the gap between the fins. Furthermore, the heat exchanger 8 is attached inside the cabinet 1 so that the upper part is on the front outlet 10 side and the lower part is on the fan 3 side, that is, is inclined upward toward the downstream. Thereby, the effective area of the heat exchanger 8 can be ensured widely, and air-conditioning capability can be improved.

  Moreover, the 1st wind guide plate 15 and the 2nd wind guide plate 16 are arrange | positioned with the predetermined space | interval on the fan 3 side surface of the heat exchanger 8, ie, the windward surface, along the fin of a heat exchanger. The first air guide plate 15 and the second air guide plate 16 have substantially the same length as the height of the heat exchanger 8, that is, substantially the same length as the fins arranged in an inclined manner as shown in FIGS. And substantially straddles the upper side to the lower side of the windward surface of the heat exchanger 8. Further, the first air guide plate 15 and the second air guide plate 16 have a plurality of C-shaped locking portions 17 that are fitted and assembled to the copper pipes constituting the heat exchanger 8 as shown in FIG. These locking portions 17 are used to attach to the heat exchanger 8.

  Moreover, the 1st wind guide plate 15 and the 2nd wind guide plate 16 are on the surface of the position away from the front of the fan 3 in the heat exchanger 8, ie, the outer side from the mainstream range of ventilation of a fan like FIG. Is provided. Here, the first air guide plate 15 and the second air guide plate 16 are provided only on the right side as viewed in FIG. 2, but the heat exchanger 8 is provided to extend further outward than the fan 3 at the left end. In such a case, the heat exchanger 8 may be provided on the left side as viewed in FIG. Furthermore, the fan 3 is not limited to a triple fan, and needless to say, a double fan or a quadruple fan may be used.

  In the air conditioner of the present embodiment, when the electric motor 5 is driven and the fan 3 rotates, an air flow is generated, and air is blown out from the vent 7 by the fan casing 4. The air blown out from the air vent 7 reaches the heat exchanger 8 disposed in an inclined manner directly on the front surface from the fan 3 as shown by arrows in FIGS. Since the heat exchanger 8 is a fin-and-tube type as described above, air can pass through the gaps between the fins, but a certain amount of air resistance (wind guide resistance) is generated. For this reason, a part of the air blown out from the fan 3 flows in the lateral direction (heat exchanger width direction) along the windward surface of the heat exchanger 8. The air flowing in the lateral direction along the windward surface of the heat exchanger 8 is regulated by the first air guide plate 15 and guided to the heat exchanger 8 in the vertical direction. A part of the air flowing along the windward surface passes over the first air guide plate 15 and further flows in the lateral direction. The air that has passed over the first air guide plate 15 is the second air guide plate 16. And is guided in a direction perpendicular to the heat exchanger 8.

  Thus, the flow direction of the air flowing in the lateral direction (the heat exchanger width direction) along the windward surface of the blowout heat exchanger 8 from the fan 3 is changed by the first air guide plate 15 and the second air guide plate 16. It can be guided in a vertical direction with respect to the heat exchanger 8 in a two-stage manner and can be corrected. For this reason, the whistling sound (abnormal sound) generated by the air flowing so as to cut the ends of the fins can be prevented, and the air can be flowed to the inside of the heat exchanger 8 to improve the heat exchange capability. it can.

  As shown in FIGS. 4 and 5, the first air guide plate 15 and the second air guide plate 16 provided in the heat exchanger 8 have the height A, the first air guide plate 15 and the second air guide plate 16. If the distance between them, that is, the installation interval is B, the effect of efficiently preventing the generation of whistling noise (abnormal sound) can be obtained by making the B dimension within 3 times (1 to 3 times) the A dimension. Specifically, when A = 10 mm and B = 10 to 30 mm, there is no whistling sound. When B dimension is larger than 30 mm, whistling sound is generated, and when B dimension is smaller than 10 mm, wind guide resistance is generated. As a result of experiments, it was found that it was difficult to correct the air flow direction. The A dimension and the B dimension can be freely selected within the range satisfying the above conditions depending on the arrangement dimensions and forms of the fan 3 and the heat exchanger 8 of the air conditioner.

  The first air guide plate 15 and the second air guide plate 16 may be attached in two places using the same shape. Further, the first air guide plate 15 and the second air guide plate 16 may be molded products by resin molding or punched products using sheet metal as long as they have a predetermined shape.

  1 Cabinet, 2 Suction port, 3 Fan, 4 Fan casing, 5 Electric motor, 6 Partition plate, 7 Vent, 8 Heat exchanger, 9a Suction side air channel, 9b Blower side air channel, 10 Air outlet, 11 Drain pan, 12 Decorative panel, 13 suction grille, 14 wind direction plate, 15 first wind guide plate, 16 second wind guide plate.

Claims (2)

An air conditioner in which a heat exchanger longer than the width of the main flow range of the blower is disposed on the blowout side of the blower,
Provided on the windward surface of the heat exchanger, the direction of the wind hitting the heat exchanger was changed by the wind guide resistance and flowed in the width direction of the heat exchanger along the windward surface of the heat exchanger A first wind guide plate for directing wind in a direction perpendicular to the heat exchanger;
Wind that is provided on the windward surface of the heat exchanger and that has passed over the first air guide plate and further flows in the heat exchanger width direction along the windward surface of the heat exchanger is transmitted to the heat exchanger. A second air guide plate that is guided vertically,
An air conditioner characterized by comprising:   The air conditioner according to claim 1, wherein the mounting interval between the first air guide plate and the second air guide plate is set to 1 to 3 times the height of the air guide plates.

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