JP3829209B2 - Air conditioner indoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an indoor unit for an air conditioner, and in particular, substantially uniforms the velocity distribution of conditioned air passing through a blow-out flow path from a heat exchanger blow-out surface to a panel blow-out port, thereby saving energy, reducing noise, and improving performance. It is suitable for what is shown.
[0002]
[Prior art]
Conventionally, in order to save energy and reduce noise in indoor units for air conditioners, an air guide has been provided in the outlet flow path from the outlet surface of the heat exchanger to the panel outlet, and the main flow and the secondary flow are separated into two. It is known that a side flow generated on the heat exchanger side inside the blowout flow path prevents the main flow from being pushed toward the outer wall side and narrowing the execution flow path to increase the pressure loss. An example of inserting between the fins of the exchanger is described in Japanese Patent Laid-Open No. 2000-193264.
[0003]
[Problems to be solved by the invention]
In the above prior art, it is possible to prevent the secondary flow from pushing the main flow toward the outer wall side and narrowing the execution flow path, but the flow velocity of the secondary flow is small compared to the main flow, and the heat exchange side of the outlet flow path As a result, a large wind speed distribution is generated in the direction from the outer wall to the outer wall, the pressure loss of the blowout passage increases, the required power of the fan motor increases, and the noise generated in the fan also increases. In addition, since the air guide is inserted between the fins of the heat exchanger, there is a possibility that the condensed water that has dewed on the heat exchanger will fall from the panel outlet to the air-conditioned space through the air guide.
[0004]
An object of the present invention is to make the wind speed distribution of the blowout flow path of the indoor unit substantially uniform, and to save energy and reduce noise, without the condensed condensed water falling from the panel blowout opening.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is provided with a housing, a blower, and a heat exchanger on the suction side of the blower and a heat exchanger on the blowout side of the blower, and the air is supplied to the bellmouth, the heat exchanger, and the blowout. In the indoor unit of the air conditioner that passes through the flow path and the air outlet, a water receiver having a side wall formed so as to receive condensate condensed on the heat exchanger below the heat exchanger, and the heat exchanger An air guide that is installed so as to be substantially parallel to the side wall, and is supported by the water receiver, by dividing the outlet passage from the outlet to the panel outlet into a main stream on the outside and a side stream on the heat exchanger side. And.
[0006]
Moreover, in the above, it is desirable that the air guide be positioned outside the side wall of the water receiver.
[0007]
Furthermore, in the above, it is desirable that the air guide is installed so that the main flow gradually spreads toward the outlet.
[0008]
Furthermore, in the above, it is desirable that the distance from the side wall of the water receiver to the air guide is 1/5 to 1/10 of the distance from the side wall of the water receiver to the inner wall of the housing.
Further, in the above, it is desirable that an inclined portion is provided at the upper end of the air guide, and the air guide is formed in a polygonal shape or an arc shape.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment, FIG. 2 is a plan view, and the indoor unit 101 is provided with a blower 102 provided on a top plate 111 and a suction upstream side of the blower 102. A suction grill 104 supported by a panel 103, a filter 105 and a bell mouth 106, a heat exchanger 108 provided on a top plate 111 so as to surround the blower 102 on the blower blowout side, and a heat below the heat exchanger 108. A water receiver 107 having a side wall is provided so as to receive the condensed water dewed on the exchanger.
The blower side of the heat exchanger 108 is provided with an inner wall 109 of the housing, and a blower port 110 supported by the panel 103 is provided below the inner wall of the housing. The air guide 113 is provided between the heat exchanger 108 and the blower port 110. Thus, both ends of the water receiver 107 are supported.
[0011]
The air in the indoor unit is sucked from the suction grill 104 supported by the panel 103, passes through the heat exchanger 108 through the filter 105 and the bell mouth 106, and is formed by the inner wall surface of the housing and the side wall portion of the water receiver. It passes through the blowout flow path 112 and blows out from the blowout port 110 to the outside.
FIG. 3 is a cross-sectional view showing a velocity distribution of conditioned air passing through a blow-out passage in a conventional indoor unit, and FIG. 4 is a cross-sectional view showing a velocity distribution of conditioned air passing through a blow-off passage in the indoor unit according to one embodiment. The display range corresponds to part A of FIG. 1 and is an enlarged view thereof. In the case of FIG. 3, the conditioned air 114b (secondary flow) that has passed through the portion installed in the water receiver of the heat exchanger 108 is shown. And the conditioned air 114a (main flow) that has passed through the other part of the heat exchanger are separated by the air guide 113, and the side flow can be prevented from pushing the main flow toward the inner wall of the casing. Therefore, it is possible to prevent the execution flow path from being narrowed and the pressure loss from increasing. However, since the flow velocity of the secondary flow 114b is blocked by the side wall of the water receiver, it is smaller than that of the main flow 114a, and a large wind speed distribution is generated from the heat exchanger side of the outlet passage 112 toward the inner wall surface 109 of the housing. The pressure loss of the blowout flow path 112 increases. That is, the required power of the fan motor increases and the noise generated in the fan also increases. Further, since the air guide 113 is inserted between the fins of the heat exchanger 108, the condensed water 115 dewed on the heat exchanger 108 falls through the air guide 113 to the conditioned space from the panel outlet. There is a fear.
In FIG. 4, since the air guide 113 can be installed at a certain distance from the outlet face of the heat exchanger, the condensed water that has dewed on the heat exchanger 108 passes through the air guide 113 and goes from the panel outlet to the conditioned space. It can prevent falling.
[0012]
Further, the air guide 113 is positioned outside the side wall of the water receiver 107, that is, the front end position of the upper inclined portion of the air guide 113 is closer to the inner wall of the housing than the extension line of the inner wall of the water receiver 107. Since it is installed so as to be located on the 109 side, it is possible to prevent the air guide 113 from falling off when the heat exchanger 108 hits the air guide 113 when the heat exchanger 108 is assembled to the water receiver 107 in the manufacturing process. it can.
[0013]
Further, the air guide 113 gradually spreads toward the outlet 110, that is, the air guide 113 has a distance w1 from the portion where the distance w1 between the air guide 113 and the inner wall 109 of the housing is shortest toward the outlet. The air guide is arranged with an angle θ at the straight line at the lower end of the air guide so as to spread gradually. Therefore, the wind speed of the main flow is decelerated, the wind speed distribution of the main flow and the side flow in the blowing flow path is made uniform, and the pressure loss in the blowing flow path is reduced. Moreover, the pressure loss is further reduced by the diffuser effect in which the mainstream velocity energy is converted to pressure energy, and energy saving and noise reduction of the air conditioner can be realized.
The pressure loss characteristic in the blowout flow path 112 differs depending on the magnitude of the angle θ formed by the straight line at the lower end of the air guide 113 and the vertical direction, and will be described with reference to FIG.
FIG. 5 shows the angle between the air guide lower end straight line portion and the vertical direction, and the pressure loss characteristics of the blowout flow path when the pressure loss in the blowout flow path when θ is 0 is zero. Here, + θ represents an angle toward the inner wall of the casing, and −θ represents an angle toward the heat exchanger.
[0014]
As shown in FIG. 5, when θ is increased to θ ₁ ° in the + direction, the flow area of the main flow area increases, the wind speed of the main flow decreases, and the wind speed distribution of the main flow and the side flow in the discharge flow path becomes substantially uniform. The pressure loss is further reduced by the diffuser effect in which the pressure loss in the flow path is reduced and the mainstream velocity energy is converted to pressure energy. However, if θ exceeds θ ₁ °, the main flow is peeled off from the air guide, and the pressure loss of the blowout flow path increases due to the loss due to peeling. Conversely, if θ is increased in the − direction, the flow area of the main flow section decreases, the wind speed of the main flow increases, and the wind speed distribution of the main flow and the side flow in the blow flow passage increases, resulting in a pressure loss in the blow flow passage. Will increase.
[0015]
Therefore, the maximum effect can be obtained by installing the air guide with the air guide outlet side having a predetermined angle with respect to the main stream. The angle is approximately half of θ ₁ °.
[0016]
Moreover, since the pressure loss characteristic in a blowing flow path changes with distance w2 of the location which connects a water receiving side wall and the upper-end inclination part and lower end straight part of an air guide, it demonstrates with FIG.
FIG. 6 shows a ratio w2 / w of the distance w2 between the water receiving side wall and the portion connecting the upper end inclined portion and the lower end straight portion of the air guide and the distance w between the water receiving side wall and the inner wall of the housing, and the blowing channel in a state where no flap is installed. The characteristic of the pressure loss of the blow-off channel when the pressure loss is zero is shown.
[0017]
FIG. 6 shows that pressure loss increases when w2 / w is less than 1/10 or more than 1/5. This is because if w2 / w is too small, the flow path of the secondary flow is extremely narrow and causes an increase in the pressure loss of the secondary flow. If w2 / w is too large, the main flow is narrowed, and the wind speed of the main flow is reduced. This increases the difference in wind speed between the main flow and the side flow and causes an increase in pressure loss. Therefore, it is important to provide the air guide so that w2 / w is 1/5 to 1/10, in order to have the effect of reducing the pressure loss of the air guide.
[0018]
FIG. 7 shows a cross-sectional view of the air guide 113, and the display range corresponds to part A of FIG. The upper end inclined portion of the air guide 113 has an effect of preventing separation of the main flow and the side flow and preventing the side flow from pushing the main flow toward the outer wall side to narrow the execution flow path and increasing the pressure loss. Shows an air guide 113 in which the upper end inclined portion is formed in a polygonal shape. Note that the upper end inclined portion of the air guide 113 may have a substantially arc shape, a substantially airfoil shape, or a free curve in accordance with ease of manufacture and manufacturing cost.
[0019]
FIG. 8 shows a water receiver vicinity view of an indoor unit according to another embodiment, and the display range corresponds to part A of FIG. 1 and is an enlarged view thereof. In FIG. 8, L-shaped support members 113a for sandwiching the water receiver 107 in the air guide 113 are provided at two locations on the water receiver side inner surface of the air guide 113 so that the air guide 113 is placed in the outlet flow passage in the housing. I support it. Thereby, it is possible to prevent the air guide 113 from coming into contact with the heat exchanger, and it is possible to prevent the condensed water that has dewed on the heat exchanger from passing through the air guide 113 and falling from the panel outlet to the conditioned space.
[0020]
FIG. 9 shows a water receiving vicinity view of an indoor unit according to still another embodiment, and the display range corresponds to the A part of FIG. 1 and is an enlarged view thereof. FIG. 9 shows that the air guide 113 is provided with a plurality of rod-shaped support members 113b on the water receiving side inner surface of the air guide for fitting into the concave recesses provided in the water receiver 107, thereby allowing the air flow in the housing to be blown out. The air guide 113 can be supported in the road. In this example, the arrangement means can be fitted into the recess of the water receiver 107 in accordance with the material and shape of the water receiver.
[0021]
FIG. 10 shows a water receiver vicinity view of an indoor unit according to still another embodiment, and the display range corresponds to part B of FIG. 2 and is an enlarged view thereof. FIG. 10 shows that the air guide 113 is provided with rod-shaped support members 113c for fitting into the concave recesses provided in the water receiver 107 on both sides of the air guide, so that the air is introduced into the blow-out flow path in the casing. The guide can be supported.
[0022]
FIG. 11 shows a water receiving vicinity view of an indoor unit according to still another embodiment, and the display range corresponds to part A of FIG. 1 and is an enlarged view thereof. FIG. 11 shows that the air guide 113 is provided with a plurality of L-shaped support members 113d on the inner wall side of the air guide 113 for screwing or adhering to the inner wall 109 of the casing. The air guide 113 can be supported. According to this example, since it can be screwed or bonded to the inner wall 109 of the housing, workability is improved.
[0023]
FIG. 12 shows the tip shape of the upper end inclined portion of the air guide 113, and the tip shape of the upper end inclined portion is a polygon. With this configuration, it is possible to reduce the pressure loss due to the collision when the conditioned air traveling from the heat exchanger toward the blowing channel collides with the tip of the air guide. Note that the air guide 113 may have a substantially arc shape, a substantially airfoil shape, or a free curve in accordance with the manufacturing convenience and manufacturing cost.
[0024]
FIG. 13 shows the tip shape of the lower end straight portion of the air guide 113, and the tip shape of the lower end straight portion is a polygon. Thereby, when the main flow and the substream of the conditioned air separated by the air guide merge through the air guide blower side tip, there is no sudden channel expansion, and pressure loss is alleviated. Note that the air guide 113 may have a substantially arc shape, a substantially airfoil shape, or a free curve in accordance with the manufacturing convenience and manufacturing cost.
[0025]
FIG. 14 further shows a water receiving vicinity view of an indoor unit according to another embodiment, and the display range corresponds to part A of FIG. 1 and is an enlarged view thereof. FIG. 13 shows a shape in which the air guide 113 is formed in parallel to the side wall shape of the water receiver 107 on the outer wall side of the water receiver 107. The water receiver 107 has a side wall and a housing depending on the shape of the heat exchanger provided with the water receiver. This is advantageous when the shape is such that the distance from the outer wall of the body is different, or when the water receiver 107 has irregularities on the side wall on the outer wall side of the housing.
[0026]
FIG. 15 is a view showing the vicinity of a water receiver according to still another embodiment, and the display range corresponds to part A of FIG. 1 and is an enlarged view thereof. FIG. 14 shows a state in which one or a plurality of air guides 113 are installed. By installing a plurality of air guides 113 in the main flow part of the blowout flow path, the mainstream wind speed distribution can be made more uniform.
FIG. 16 shows another embodiment, and is an enlarged view corresponding to part A in FIG. 1 in the vicinity of the water receiver of the indoor unit. The water receiver 107 has a convex portion for attaching to the housing on its outer side wall, and the air guide 113 is formed along the side wall of the water receiver 107. According to this example, since the air guide 113 has a shape along the convex portion of the water receiver 107, the air flow around the convex portion can be rectified, and can be made uniform without disturbing the mainstream wind speed distribution. it can.
[0027]
FIG. 17 shows still another embodiment and corresponds to part A of FIG. The water receiver 107 has a convex portion for attaching to the housing on the outer side wall thereof, and the air guide 113 is divided into a plurality of parts along the side wall of the water receiver 107. According to this example, the manufacturing efficiency is improved and the manufacturing cost can be reduced.
In the above, the air guide can be applied not only to the centrifugal blower but also to be made of a sheet metal, a resin, a foamed material, or the like.
[0028]
【The invention's effect】
As described above, according to the present invention, the condensed condensed water does not fall from the panel outlet, and the wind speed distribution in the outlet passage of the indoor unit is made substantially uniform, thereby saving energy and reducing noise. be able to.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention.
FIG. 2 is a plan view of the indoor unit of the air conditioner according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a wind speed distribution in a blow-out passage of an indoor unit of a conventional air conditioner.
FIG. 4 is a cross-sectional view showing the wind speed distribution in the blow-out flow path of the indoor unit of the air conditioner according to the embodiment of the present invention.
FIG. 5 is a characteristic diagram showing the relationship between the shape of the air guide and the pressure loss.
FIG. 6 is a characteristic diagram showing the relationship between the air guide mounting position and pressure loss.
FIG. 7 is a cross-sectional view of an air guide according to an embodiment.
FIG. 8 is a perspective view showing the vicinity of a water receiver of an indoor unit according to one embodiment.
FIG. 9 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 10 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 11 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 12 is a cross-sectional view showing the tip shape of the upper end inclined portion of the air guide according to one embodiment.
FIG. 13 is a cross-sectional view showing the tip shape of the lower straight portion of the air guide according to one embodiment.
FIG. 14 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 15 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 16 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
FIG. 17 is a perspective view showing the vicinity of a water receiver of an indoor unit according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Indoor unit of air conditioner, 102 ... Air blower, 103 ... Panel, 104 ... Suction grill, 106 ... Bell mouth, 107 ... Water receiver, 108 ... Heat exchanger, 109 ... Inner wall of housing, 110 ... Air outlet, 112... Blowing flow path, 113... Air guide, 113 a.

Claims (2)

A housing, a blower, and a heat exchanger on the suction side of the bell mouth are provided on the suction side of the blower, and the air is conditioned by air passing through the bell mouth, the heat exchanger, the blowout flow path, and the blowout port. In the indoor unit of the machine,
A water receptacle having a side wall formed so as to receive condensed water dewed on the heat exchanger below the heat exchanger, and an outlet main stream extending from the heat exchanger to the panel outlet. The air guide is divided into two substreams on the heat exchanger side and is supported by the water receiver, and the air guide is located outside the side wall of the water receiver. Air conditioner indoor unit. A housing, a blower, and a heat exchanger on the suction side of the bell mouth are provided on the suction side of the blower, and the air is conditioned by air passing through the bell mouth, the heat exchanger, the blowout flow path, and the blowout port. In the indoor unit of the machine,
A water receptacle having a side wall formed so as to receive condensed water dewed on the heat exchanger below the heat exchanger, and an outlet main stream extending from the heat exchanger to the panel outlet. An air guide that divides into two substreams on the heat exchanger side, and the air guide is installed so that the mainstream gradually spreads toward the outlet. Machine.

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