JP2010216750A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of achieving low ventilation resistance in an air trunk, low noise and low input. <P>SOLUTION: This air conditioner includes an electric motor 11 disposed inside of a device body 1, a plurality of air blowers 3 disposed inside of the device body 1 and driven by the electric motor 11, a heat exchanger 5 disposed at a discharge side of the air blowers 3 inside of the device body 1 and conditioning the indoor air introduced through a suction opening 2, and straightening plates 6 disposed on an upstream side-surface of the heat exchanger 5 by at least one or more sheets respectively in regions where a position in the stacking width direction of the heat exchanger 5 is roughly agreed with regions held by side face-side both end sections of supply openings of the plurality of air blowers 3, and the opposed side faces of the air blowers 3 adjacent to each other to straighten the air flowing into the heat exchanger 5. A front edge of the straightening plate 6 has a groove section in the direction orthogonal to the longitudinal direction of the straightening plate, and curved to a blower side closest to the straightening plate 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner in which a blower and a heat exchanger are housed, and more particularly to rectification of an air flow blown from a blower to a heat exchanger.

  A conventional ceiling-embedded air conditioner has an air suction port on the lower surface of the housing. Room air is sucked from the air suction port into the air passage by a blower, and the air blown from the blower is blown into the air passage. The heat exchanger exchanges heat between the refrigerant and room air to form secondary air, and the secondary air is blown out indoors by controlling the air direction with an air direction plate from the air outlet provided on the lower surface of the housing. It was.

  However, when the air blown out from the blower flows into the heat exchanger, the flow of air does not flow in parallel to the fins of the heat exchanger and flows in at an angle, so the flow collides with the fins, There was a problem that noise was generated due to the generation of vortices between the fins.

  In response to such a problem, for example, “a suction port 2 is provided in the lower front portion of the main body 1 divided vertically by a partition plate 1a having a ventilation port, a blower port 7 is provided in the upper portion, and the suction port and the blower port are arranged. In an air conditioner comprising a heat exchanger 3 and a plurality of centrifugal fans 5 housed in a fan casing 6 that is connected to the left and right via a drive motor 4 and connected to the ventilation opening, in an air passage to be connected, Suppressing the wind noise of the air flow while guiding the blown air uniformly in the front-rear and left-right directions between the blower side of the fan casing and the heat exchanger toward the pass region of the heat exchanger There is a rectifying plate 9 provided with a means "(for example, see Patent Document 1).

Japanese Patent Laid-Open No. 10-220858 (Summary, page 4, FIG. 1)

  In the ceiling-embedded air conditioner (Patent Document 1) configured as described above, a rectifying plate is provided so as to cover the entire area of the blower outlet, so that the air flow blown from the blower collides with the rectifying plate. There was a problem that noise increased. Further, since the rectifying plate is provided in the air passage between the blower and the heat exchanger, the rectifying plate and the support member that supports the rectifying plate increase the ventilation resistance in the air passage, and as a result, the rotation speed of the blower There is a problem that noise and the input (power consumption) of the blower increase.

  The present invention has been made to solve the above problems, and an object of the present invention is to obtain an air conditioner that has low ventilation resistance in the air passage, low noise, and low input.

  An air conditioner according to the present invention is provided in an air conditioner main body, the air conditioner main body, a suction port for introducing indoor air into the air conditioner main body, and provided in the air conditioner main body. A blower outlet for discharging the generated air into the room, an electric motor provided inside the air conditioner main body, a plurality of fans provided inside the air conditioner main body and driven by the electric motor, and the air conditioner A heat exchanger that is provided on the discharge side of the blower inside the main body and that air-conditions the indoor air introduced through the suction port; and an upstream surface of the heat exchanger, wherein the product width of the heat exchanger At least one or more directional positions are provided in the regions substantially coincident with the regions sandwiched between the side surfaces of the blower outlets of the plurality of blowers and the opposed side surfaces of the adjacent blowers, respectively, in the heat exchanger. Said inflowing air A flow straightening plate for attenuating speed in the exchanger product width direction, the front edge of the flow straightening plate is provided with a groove in a direction perpendicular to the longitudinal direction of the flow straightening plate, and the blower side closest to the flow straightening plate Is curved.

  According to the air conditioner according to the present invention, with the above configuration, the ventilation resistance of the air passage in the air conditioner main body is reduced, and noise deterioration due to the collision between the blower blowing flow and the heat exchanger is prevented. Therefore, noise and input (power consumption) can be reduced.

It is side surface sectional drawing of the air conditioner which concerns on Embodiment 1 of this invention. It is a plane sectional view of the air harmony machine concerning Embodiment 1 of the present invention. It is a perspective view of the baffle plate of the air conditioner which concerns on Embodiment 1 of this invention. It is the figure which showed the result of the flow analysis in an air path from the air blower outlet of the conventional ceiling embedded type air conditioner without a baffle plate to a heat exchanger. The distribution of the absolute value | Vz | of the heat flow in the width direction of the heat exchanger at the inlet of the heat exchanger obtained from the flow analysis in the air channel of a conventional ceiling-mounted air conditioner without a rectifying plate is shown. FIG. It is sectional drawing of the location where the baffle plate of the heat exchanger surface of the ceiling-embedded air conditioner which concerns on Embodiment 1 of this invention was installed. It is sectional drawing of the heat exchanger surface of the ceiling-embedded air conditioner which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a side cross-sectional view of an air conditioner according to Embodiment 1 of the present invention as seen from the side.
As shown in FIG. 1, the air conditioner according to the first embodiment is provided with a suction port 2 for introducing room air on a rear lower surface of a box-shaped air conditioner main body (hereinafter referred to as an apparatus main body) 1. It has been. The suction port 2 is usually provided with a filter for removing dust and the like.

  In the vicinity of the suction port 2 in the apparatus main body 1, a plurality of blowers 3 a and 3 b (which are collectively referred to as a blower 3) are provided on the same axis. The blower 3 is driven by an electric motor 11 (see FIG. 2). Here, a sirocco fan is used as the blower 3 as an example.

  In the air passage 4 in the apparatus main body 1, a heat exchanger 5 constituting a refrigeration cycle is arranged on the downstream side of the blower 3, and here, heat is exchanged between the refrigerant in the heat exchanger 5 and room air. The heat exchanger 5 is, for example, a fin tube type, and is configured by stacking fins in the axial direction of the blower 3. The air that has passed through the heat exchanger 5 is called secondary air. On the upstream surface of the heat exchanger 5, a rectifying plate 6 that rectifies the air blown from the blower 3 is provided. A drain pan 7 that receives water dripped from the heat exchanger 5 is provided at a lower portion of the heat exchanger 5. The heat exchanger 5 constitutes a part of the refrigeration cycle. A refrigeration cycle (not shown) is configured by connecting a compressor, a heat exchanger (condenser), a pressure reducing valve, and a heat exchanger (evaporator) in an annular shape via a refrigerant pipe. The heat exchanger 5 functions as a condenser or an evaporator by switching the four-way valve.

  A blower outlet 8 is provided on the lower surface of the front portion of the apparatus main body 1 to discharge the conditioned air into the room. The air outlet 8 is provided at the same height as the air inlet 2, and the side wall 9 of the drain pan 7 forms a part of the air outlet 8.

FIG. 2 is a top sectional view of the air conditioner as viewed from above.
As for the rectifying plate 6, the position in the stacking width direction (horizontal direction in FIG. 2) on the surface of the heat exchanger 5 is opposite to the positions of both end portions on the side surface side of the blower outlet and the one blower 3a and the other blower 3b. Each is provided in a region that substantially matches the region sandwiched between the side surfaces. In FIG. 2, a total of eight rectifying plates 6 are provided as an example.

FIG. 3 is an enlarged view of the current plate 6.
The front edge of the current plate is curved toward the closest blower 3 side. A plurality of grooves 6 ′ are provided on the front edge of the current plate 6 in a direction perpendicular to the longitudinal direction. The lower part 6a of the current plate 6 is thin, and the lower part 6a is inserted into the fins of the heat exchanger 5 and fixed. The material of the current plate 6 is, for example, resin.

Next, the operation of the air conditioner according to Embodiment 1 will be described.
In the air conditioner configured as described above, when the operation is started, the indoor air flowing in from the suction port 2 by the rotation of the electric motor 11 and the operation of the blower 3 is converted into the refrigerant in the heat exchanger 5. Heat exchange is performed to form secondary air. The secondary air discharged from the heat exchanger 5 is blown out into the room from the blowout port 8.

FIG. 4 shows the result for one blower 3 of the flow analysis in the air passage from the blower 3 outlet of the ceiling-embedded air conditioner without the rectifying plate 6 to the heat exchanger 5.
When there is no rectifying plate 6, the air flow from the blower 3 flows parallel to the fins of the heat exchanger 5 in the vicinity of the middle of the blowout port of the blower 3, but in the region from the middle to both ends, the heat exchanger 5. It spreads in the shape of a fan toward the surface, and this tendency is stronger at both ends.

FIG. 5 shows the heat exchanger 5 inlet width direction of the air flow at the inlet of the heat exchanger 5 (horizontal direction in FIG. 5) obtained from the flow analysis in the air channel of the ceiling-embedded air conditioner without the rectifying plate 6. ) Distribution of velocity absolute value | Vz |. In black, the absolute value of the speed in the width direction of the heat exchanger 5 is 0 m / s, and white is 3 m / s.
As the absolute value | Vz | of the velocity of the air flow in the air passage is larger, the flow collides with the fins when flowing into the heat exchanger 5, and vortices are generated between the fins. Will increase. In the ceiling-embedded air conditioner without the rectifying plate 6, | Vz | particularly in a region where the position in the product width direction on the surface of the heat exchanger substantially coincides with the positions of both end portions on the side surface side of the blower 3 outlet. It can be seen that is large.

  In order to deal with such a problem, as described above, in the conventional technique (Patent Document 1), a rectifying plate is installed between the blower and the heat exchanger, and air blown from the blower toward the path region of the heat exchanger. Is guided uniformly in both the front and rear and left and right directions and flows into the heat exchanger to suppress wind noise in the heat exchanger. However, when the rectifying plate is provided so as to cover the entire area of the blower outlet, there is no need for rectification in the middle area of the blower outlet that flows relatively parallel to the heat exchanger fins, and simply the ventilation resistance and As a result, the rotational speed of the blower must be increased, and noise and input (power consumption) are increased. Further, since the rectifying plate is provided in the air passage between the blower and the heat exchanger, the support member that supports the rectifying plate and the rectifying plate increases the ventilation resistance in the air passage, and as a result, increases the rotational speed of the blower. Noise and input (power consumption) increase.

FIG. 6 is a cross-sectional view of a location where the current plate 6 on the surface of the heat exchanger 5 is installed.
The rectifying plate 6 is not immediately after the blower 3 outlet, but is on the surface of the heat exchanger 5. When the flow of air in the air passage is large | Vz | Because it is installed only at the place where it occurs, it reduces noise without increasing the ventilation resistance in the middle of the blower outlet of the blower that flows relatively parallel to the fins of the heat exchanger, as in the conventional rectifying plate. can do.

  Moreover, as shown in FIG. 3, the front edge of the rectifying plate 6 is curved toward the closest blower 3 side, and a plurality of grooves are provided in the vertical direction in the longitudinal direction. Thereby, when the air flow from the blower outlet on the side of the blower 3 flows into the rectifying plate 6, separation at the leading edge is suppressed, and further, the air flow flows into the heat exchanger 5 along the groove 6 ′. Therefore, noise can be reduced as compared with the conventional current plate.

  The rectifying plate 6 is inserted into the fins of the heat exchanger 5. This eliminates the need for the current plate 6 support member, reduces the air flow resistance in the air passage while reducing cost and weight, and reduces noise and input (power consumption). In addition, by manufacturing the rectifying plate 6 with a resin, mass production is possible with a mold, and the manufacturing cost can be suppressed.

  As described above, the rectifying plate 6 according to the first embodiment is provided in the ceiling-embedded air conditioner, and the rectifying plate 6 is peeled off at the leading edge of the rectifying plate 6 while reducing the ventilation resistance at a place where the rectifying plate 6 is unnecessary. In addition, air having a speed in the product width direction of the heat exchanger 5 from the blower outlet 3 can be rectified so as to be parallel to the fins of the heat exchanger 5, and noise and input (power consumption) can be reduced. Can do. Further, since the resin rectifying plate 6 is inserted and fixed in the heat exchanger 5, the ventilation resistance in the air passage is reduced while reducing the cost and weight, and noise and input can be reduced.

  In the above description, the height of the rectifying plate 6 is not specified, but when the height is too high and close to the blower outlet of the blower 3, the airflow from the blower outlet tends to interfere. Therefore, 1/3 or less of the distance between the heat exchanger 5 upstream surface and the blower 3 outlet is desirable.

Embodiment 2. FIG.
In the first embodiment, the example in which the material of the rectifying plate 6 is made of resin has been described. However, the material of the rectifying plate 6 is not limited thereto, and for example, the same material as the fin of the heat exchanger 5 is used. Also good.
When the rectifying plate 6 made of the same material as the fins of the heat exchanger 5 is inserted into the heat exchanger 5, not only the heat exchanger 5 but also the rectifying plate 6 can exchange heat, increasing the amount of heat exchange, By reducing the air volume, noise and input can be further reduced.

Embodiment 3 FIG.
FIG. 7 is a cross-sectional view of the surface of the heat exchanger 5 of the ceiling-embedded air conditioner according to Embodiment 3 of the present invention. In FIG. 7, the same reference numerals are given to the same functional portions as those in the first embodiment, and different configurations will be described.

The heat exchanger 5 according to the third embodiment in FIG. 7 does not have the rectifying plate 6 installed at the position where the rectifying plate 6 according to the first embodiment is installed, but on the fin 10 front edge side of the heat exchanger 5 at that position. The height in the direction perpendicular to the surface on the upstream side of the heat exchanger 5 is higher than the fins at other locations. Further, the front edge of the fin 10 is curved toward the blower side closest to the fin 10.
As a result, the flow blown out from the blower 3 can be rectified by the fins of the heat exchanger 5 instead of being rectified by the rectifying plate 6, so that the ventilation resistance of the rectifying plate 6 is eliminated, and noise and input are further reduced. can do.

In addition, in said embodiment, although the example which has eight baffle plates was demonstrated, the stacking width direction position of a heat exchanger has the side surface side both ends of the blower outlet of air blowers 3a and 3b, and an adjacent air blower. What is necessary is just to provide at least 1 or more each in the area | region which substantially corresponds to the area | region pinched | interposed into the side surface which 3a, 3b adjacent blower opposes.
Moreover, although the example which installed two air blowers 3a and 3b was demonstrated, you may install arbitrary numbers of three or more.
Moreover, as an air conditioner according to an embodiment of the present invention, a ceiling-embedded air conditioner has been described as an example. However, the air conditioner according to the present invention is not limited to the example, and is a wall-mounted type. The same applies to the thing.

1 device body, 2 suction port, 3 blower, 4 air path, 5 heat exchanger, 6 current plate,
6 'groove, 7 drain pan, 8 outlet, 9 drain pan side wall, 10 fin, 11 electric motor.

Claims (5)

An air conditioner body,
A suction port provided in the air conditioner body, for introducing indoor air into the air conditioner body;
An air outlet provided in the air conditioner main body, for discharging air-conditioned air indoors;
An electric motor provided inside the air conditioner body;
A plurality of blowers provided in the air conditioner body and driven by the electric motor;
A heat exchanger that is provided on the discharge side of the blower inside the air conditioner body, and that air-conditions the indoor air introduced through the suction port;
In the upstream surface of the heat exchanger, the stack width direction position of the heat exchanger is in a region sandwiched between the side surface side both ends of the blower outlets of the plurality of blowers and the opposite side surfaces of the adjacent blowers. At least one or more sheets are provided in substantially coincident regions, respectively, and a rectifying plate that rectifies air flowing into the heat exchanger is provided.
An air conditioner, wherein a front edge of the current plate is provided with a groove in a direction perpendicular to the longitudinal direction of the current plate, and is curved toward the blower side closest to the current plate.   The air conditioner according to claim 1, wherein the current plate is made of resin.   The air conditioner according to claim 1 or 2, wherein a material of the current plate is equal to a fin of the heat exchanger.   The air conditioner according to any one of claims 1 to 3, wherein the rectifying plate is inserted and fixed to a fin of the heat exchanger. An air conditioner body,
A suction port provided in the air conditioner body, for introducing indoor air into the air conditioner body;
An air outlet provided in the air conditioner main body, for discharging air-conditioned air into the room;
A motor provided inside the air conditioner body,
A plurality of blowers provided inside the air conditioner body and driven by the motor;
A heat exchanger that is provided on the discharge side of the blower inside the air conditioner body and that air-conditions indoor air introduced through the suction port;
The heat exchanger is a fin on the upstream side of the heat exchanger, and the position in the product width direction is a region sandwiched between both side portions of the side surfaces of the blower outlets of the plurality of fans and the opposite side surfaces of the adjacent fans. An air conditioner characterized in that the height of fins in a region that substantially coincides with is higher than fins in other regions.

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