JP2003074960A - Indoor machine for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save on energy and reduce noise by substantially unifying an air speed distribution in an blow-out air flow passage for an indoor machine. SOLUTION: The indoor machine is provided with a casing and a ventilating device 102 while air passes through a bellmouth 106, a heat exchanger 108, an air blow-out flow passage 112 and an air blow-out port 110. In such an indoor machine, a water receiver 107, whose side wall is formed so as to receive condensed water, condensated on the lower part of the heat exchanger 108, and an air guide, dividing the air blow-out passage from the heat exchanger 108 to the air blow-out port into two flows of an outside main flow and a heat exchanger side auxiliary flow while being supported by the water receiver 107 installed so as to be substantially parallel to the side wall, are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit for an air conditioner, and more particularly to a uniform velocity distribution of conditioned air passing through a blowout passage from a heat exchanger blowout surface to a panel blowout port,
It is suitable for energy saving, low noise, and capacity improvement.

[0002]

2. Description of the Related Art Conventionally, in order to save energy and reduce noise in an indoor unit for an air conditioner, an air guide is provided in a blowout flow path from a blowout surface of a heat exchanger to a panel blowout opening, and a mainstream and a substream are provided. It is known that it is separated into two parts, and a side flow generated on the side of the heat exchanger, which is the inside of the blowout flow path, pushes the main flow to the outer wall side to narrow the execution flow path and increase the pressure loss, For example, an example in which an air guide is inserted between the fins of a heat exchanger is described in JP-A-2000-193264.

[0003]

In the above prior art, it is possible to prevent the sidestream from pushing the mainstream to the outer wall side and narrowing the execution flow passage, but the flow velocity of the sidestream is smaller than that of the mainstream. A large wind velocity distribution is formed from the heat exchanger side of the blowout passage to the outer wall side, 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. Further, since the air guide is inserted between the fins of the heat exchanger, there is a risk that condensed water that has condensed on the heat exchanger will drop into the air-conditioned space from the panel outlet through the air guide.

An object of the present invention is to make the wind speed distribution of the blowout flow path of the indoor unit substantially uniform, without condensing the condensed water that has fallen off from the panel outlet, thereby saving energy and reducing noise. is there.

[0005]

In order to achieve the above object, the present invention provides a housing, an air blower, and a heat exchanger on the suction side of the air blower and on the blowout side of a bell mouth, and the air is In an indoor unit of an air conditioner that passes through a bell mouth, the heat exchanger, an outlet flow passage, and an outlet, a side wall is formed below the heat exchanger to receive condensed water that has condensed on the heat exchanger. The water receiver and the outlet flow path from the heat exchanger to the panel outlet are divided into an outer main stream and a side stream on the heat exchanger side, and are installed so as to be substantially parallel to the side wall. And an air guide supported by the water receiver.

Further, in the above, it is preferable that the air guide is located outside the side wall of the water receiver.

Further, in the above-mentioned structure, it is desirable that the air guide is installed so that the main stream gradually spreads toward the outlet.

Further, 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. Furthermore, in the above-mentioned thing, it is desirable that the upper end of the air guide is provided with an inclined portion and is formed in a polygonal shape or an arc shape.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an indoor unit of an air conditioner according to an embodiment, and FIG. 2 is a plan view of the indoor unit 101.
Is a blower 102 and a blower 10 provided on the top plate 111.
2, a suction grill 104 supported by a panel 103, a filter 105, and a bell mouth 106,
The top plate 11 is provided on the blower side so as to surround the blower 102.
1, a water receiver 107 having a side wall formed below the heat exchanger 108 is formed so as to receive condensed water that has condensed on the heat exchanger. Heat exchanger 10
An inner wall 109 of the housing is provided on the outlet side of the housing 8, and an outlet 110 supported by the panel 103 is provided below the inner wall of the housing. The air guide 113 serves as the heat exchanger 108 and the outlet 1.
Both ends thereof are supported by the water receiver 107 between the two.

The air in the indoor unit is sucked from the suction grill 104 supported by the panel 103, and the filter 10
5, passing through the heat exchanger 108 via the bell mouth 106, passing through the blowout flow passage 112 formed by the inner wall surface of the housing and the side wall portion of the water receiver, and blown out from the blowout opening 110. FIG. 3 is a cross-sectional view showing a velocity distribution of conditioned air passing through a blowout passage in a conventional indoor unit, and FIG. 4 is a cross-sectional view showing a velocity distribution of conditioned air passing through a blowout passage in an indoor unit according to one embodiment. The display range corresponds to the portion A in FIG. 1 and is an enlarged view thereof. In the case of FIG. 3, the conditioned air 114b (substream) that has passed through the portion installed in the water receiver of the heat exchanger 108. And conditioned air 114a passing through the other parts of the heat exchanger
The (mainstream) and the mainstream are separated by the air guide 113, and the secondary stream can be prevented from pushing the mainstream toward the inner wall of the housing. Therefore, it is possible to prevent the execution flow path from being narrowed and increase the pressure loss. However, the flow velocity of the sidestream 114b is smaller than that of the mainstream 114a because it is blocked by the side wall of the water receiver.
A large wind velocity distribution is generated from the heat exchanger side of the blowout passage 112 toward the inner wall surface 109 of the housing, and the pressure loss of the blowout passage 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 1 condensed on the heat exchanger 108
There is a possibility that 15 may fall on the air guide 113 from the panel outlet into the air-conditioned space. In FIG. 4, since the air guide 113 can be installed at a certain distance from the heat exchanger outlet surface, condensed water that has condensed on the heat exchanger 108 passes through the air guide 113 and enters the air conditioning space from the panel outlet. You can prevent it from falling.

Further, the air guide 113 is a water receiver 107.
Of the air guide 113, that is, the tip end position of the upper end inclined portion of the air guide 113 on the heat exchanger side is located on the inner wall 109 side of the casing from the extension line of the inner wall of the water receiver 107. Since there is water in the manufacturing process 107
When assembling the heat exchanger 108, it is possible to prevent the heat exchanger 108 from hitting the air guide 113 and dropping off the air guide 113.

Further, the air guide 113 has a blowout port 1
10 so that the main stream gradually spreads, that is, the air guide 113 is provided with the air guide 113 and the inner wall 109 of the housing.
Is arranged at an angle θ at the straight part of the lower end of the air guide so that w1 gradually spreads from the shortest distance w1 toward the air outlet. Therefore, the wind velocity of the main flow is decelerated, the wind velocity distributions of the main flow and the subsidiary flow in the blowout flow passage are made uniform, and the pressure loss in the blowout flow passage is reduced. Further, due to the diffuser effect in which the velocity energy of the mainstream is converted into the energy of pressure, the pressure loss is further reduced, and the energy saving and noise reduction of the air conditioner can be realized. Since the pressure loss characteristic in the blowout flow passage 112 differs depending on the size of the angle θ formed by the lower end straight portion of the air guide 113 and the vertical direction, it will be described with reference to FIG. FIG. 5 shows an angle formed by the straight portion of the lower end of the air guide and the vertical direction, and the characteristics of the pressure loss in the blowout flow passage when the pressure loss in the blowout flow passage when θ is 0 is 0. Here, + θ indicates an angle toward the inner wall of the housing, and −θ indicates an angle toward the heat exchanger.

From FIG. 5, when θ is increased to θ ₁ ° in the + direction, the flow passage area of the main flow portion is increased, the wind velocity of the main flow is decreased, and the wind velocity distribution of the main flow and the side flow in the blowout flow passage is substantially reduced. The pressure loss in the blowout flow path is made uniform, and the velocity loss of the main flow is converted into the energy of the pressure. The diffuser effect further reduces the pressure loss. However, when θ exceeds θ ₁ °, the main flow is separated from the air guide, and the loss due to separation increases the pressure loss in the blowout flow path. On the contrary, when θ is increased in the − direction, the flow passage area of the main flow portion decreases, the wind velocity of the main flow increases, the wind velocity distribution of the main flow and the side flow in the blowout flow passage increases, and the pressure loss in the blowout flow passage increases. Will increase.

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 mainstream. The angle is approximately half the value of θ ₁ °.

Further, the pressure loss characteristic in the blow-out passage differs depending on the distance w2 between the water receiving side wall and the portion connecting the upper end inclined portion of the air guide and the lower end straight portion, which will be described with reference to FIG. FIG. 6 is a ratio of the distance w2 between the water receiving side wall and the portion connecting the upper end inclined part of the air guide and the lower end straight part to the ratio w2 / w between the water receiving side wall and the inner wall of the housing, and the blowout flow path without the flap. The characteristic of the pressure loss of the blowout flow path when the pressure loss of is set to 0 is shown.

It can be seen from FIG. 6 that when w2 / w is less than 1/10 or more than 1/5, the pressure loss increases. This is because if w2 / w is too small, the flow path of the sidestream is too narrow, which causes an increase in pressure loss of the sidestream.
If 2 / w is too large, the main flow is narrowed, the wind velocity of the main flow increases, and the difference in wind velocity between the main flow and the side flow becomes large, which causes an increase in pressure loss. Therefore, the air guide is w2 /
It is important to provide w in the range of 1/5 to 1/10 in order to have the effect of reducing the pressure loss of the air guide.

FIG. 7 shows a sectional view of the air guide 113, and the display range corresponds to the portion A in FIG. The upper inclined portion of the air guide 113 has an effect of separating the main stream and the side stream and preventing the side stream from pushing the main stream to the outer wall side and narrowing the execution flow passage to increase the pressure loss. Shows an air guide 113 whose upper end inclined portion is formed in a polygonal shape. In addition, the upper end inclined portion of the air guide 113 may have a substantially arc shape, a substantially wing shape, or a free curve, depending on the ease of manufacture and the manufacturing cost.

FIG. 8 is a view showing the vicinity of the water receiver of the indoor unit according to another embodiment, and the display range corresponds to the portion A of FIG. 1 and is an enlarged view thereof. FIG. 8 shows an L-shaped support member 113a for sandwiching the water receiver 107 in the air guide 113.
By providing the air guide 113 at the upper and lower two positions on the inner surface of the water receiving side of the air guide 113, the air guide 113 is provided in the blowout flow passage in the housing.
Have been able to support. This prevents the air guide 113 from coming into contact with the heat exchanger, and prevents condensed water that has condensed on the heat exchanger from falling on the air guide 113 into the air-conditioned space through the panel outlet.

FIG. 9 is a view showing the vicinity of the water receiver of the indoor unit according to still another embodiment, and the display range corresponds to the portion A in FIG. 1 and is an enlarged view thereof. FIG. 9 shows the air guide 113
By providing a plurality of rod-shaped support members 113b for fitting in the concave recesses provided in the water receiver 107 on the inner surface of the water guide side of the air guide, the air guide 113 is provided in the blowout flow path in the housing. Have been able to support. In this example, the arranging means can be fitted into the recess of the water receiver 107 according to the material and shape of the water receiver.

FIG. 10 is a view showing the vicinity of a water receiver of an indoor unit according to still another embodiment, and the display range corresponds to the portion B in FIG. 2 and is an enlarged view thereof. Figure 10 shows the air guide 1
By providing bar-shaped support members 113c for fitting the concave recesses provided in the water receiver 107 on both sides of the air guide 13, the air guide can be supported in the blowout flow path in the housing. It is the one.

FIG. 11 is a view showing the vicinity of a water receiver of an indoor unit according to still another embodiment, and the display range corresponds to the portion A of FIG. 1 and is an enlarged view thereof. Figure 11 shows the air guide 1
By providing a plurality of L-shaped support members 113d for screwing or adhering to the inner wall 109 of the housing 13 on the outer surface of the air guide 113 on the inner wall side of the housing, the air guide 113 is supported in the blowout flow path inside the housing. It was made possible. According to this example, the inner wall 109 of the housing can be screwed or adhered, so that workability is improved.

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 polygonal. With this configuration, it is possible to reduce the pressure loss due to the collision when the conditioned air flowing from the heat exchanger toward the outlet passage collides with the tip of the air guide. Note that the air guide 113 may have a tip shape of a substantially arc shape, a substantially wing shape, or a free curve, depending on the ease of manufacture and the manufacturing cost.

FIG. 13 shows the tip shape of the lower linear portion of the air guide 113, and the tip shape of the lower linear portion is polygonal. As a result, when the main flow and the sub-flow of the conditioned air separated by the air guide merge through the tip of the outlet side of the air guide, there is no sudden expansion of the flow path, and the pressure loss is alleviated. Note that the air guide 113 may have a tip shape of a substantially arc shape, a substantially wing shape, or a free curve, depending on the ease of manufacture and the manufacturing cost.

FIG. 14 is a view showing the vicinity of a water receiver of an indoor unit according to another embodiment. The display range corresponds to the portion A in FIG. 1 and is an enlarged view thereof. FIG. 13 shows an air guide 113
Shows a shape formed in parallel with the side wall shape of the water receiver 107 on the outer wall side of the housing, and the distance between the side wall of the water receiver and the outer wall of the housing according to the shape of the heat exchanger in which the water receiver 107 is provided. Are advantageous in the case of different shapes, or in a water receiver having unevenness on the side wall of the water receiver 107 on the outer wall side of the housing.

FIG. 15 is a view showing the vicinity of a water receiver according to still another embodiment, and the display range corresponds to the portion A in FIG. 1 and is an enlarged view thereof. FIG. 14 shows a state in which one or more air guides 113 are installed. By installing a plurality of air guides 113 in the main flow portion of the blowout flow path, the wind velocity distribution of the main flow can be made more uniform. FIG. 16 further illustrates
Another embodiment is shown in FIG. 1A near the water receiver of the indoor unit.
It is an enlarged view corresponding to a part. The water receiver 107 has a convex portion on its outer side wall for attaching to the housing,
13 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, even the air flow around the convex portion can be rectified and can be made uniform without disturbing the mainstream wind velocity distribution. it can.

FIG. 17 shows still another embodiment, which corresponds to the portion A in FIG. The water receiver 107 has a protrusion on its outer side wall for attaching to the housing,
3 is divided into a plurality of parts along the side wall of the water receiver 107 and installed. 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 fan but also to a material such as sheet metal, resin and foam material.

[0028]

As described above, according to the present invention, the condensed water condensate does not drop from the panel outlet, and the wind velocity distribution in the blowout passage of the indoor unit is made substantially uniform to save energy. It is possible to reduce noise.

[Brief description of drawings]

FIG. 1 is a 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 an outlet flow path of an indoor unit of a conventional air conditioner.

FIG. 4 is a cross-sectional view showing a wind speed distribution in an outlet flow path of an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 5 is a characteristic diagram showing the relationship between the shape of an air guide and pressure loss.

FIG. 6 is a characteristic diagram showing a relationship between a mounting position of an air guide and pressure loss.

FIG. 7 is a sectional view of the air guide according to the embodiment.

FIG. 8 is a perspective view showing the vicinity of the water receiver of the indoor unit according to the 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 the embodiment.

FIG. 13 is a cross-sectional view showing the shape of the tip of the lower linear portion of the air guide according to the 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]

101 ... Indoor unit of air conditioner, 102 ... Blower, 103
... panel, 104 ... suction grill, 106 ... bell mouth, 107 ... water receiver, 108 ... heat exchanger, 109 ... housing inner wall, 110 ... outlet, 112 ... outlet passage, 113 ...
Air guide, 113a ... L-shaped support member on the inner surface of the air guide for mounting the water receiver.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyasu Yoneyama             Hitachi, Ltd. 390 Muramatsu, Shimizu City, Shizuoka Prefecture             Air conditioning system Shimizu Production Headquarters (72) Inventor Katsuaki Nagahashi             Hitachi, Ltd. 390 Muramatsu, Shimizu City, Shizuoka Prefecture             Air conditioning system Shimizu Production Headquarters (72) Inventor Toshinori Fukasawa             Hitachi, Ltd. 390 Muramatsu, Shimizu City, Shizuoka Prefecture             Air conditioning system Shimizu Production Headquarters (72) Inventor Naoki Sugimoto             Hitachi, Ltd. 390 Muramatsu, Shimizu City, Shizuoka Prefecture             Air conditioning system Shimizu Production Headquarters (72) Inventor Naoki Kazono             502 Kintatemachi, Tsuchiura City, Ibaraki Japan             Tate Seisakusho Mechanical Research Center F-term (reference) 3L050 BD05 BF07                 3L081 AA02 AB04 BA06 BB02 BB06

Claims (5)

[Claims] 1. A housing, an air blower, and a heat exchanger on the blowout side of the bellmouth which are provided on the suction side of the blower, and the air is the bellmouth, the heat exchanger, an outlet flow passage, and an outlet. In an indoor unit of an air conditioner that passes through, a water receiver having a side wall formed below the heat exchanger to receive condensed water that has condensed on the heat exchanger, and the panel outlet from the heat exchanger. And an air guide that is installed so as to be substantially parallel to the side wall and is supported by the water receiver. An indoor unit of an air conditioner characterized by the above. 2. The indoor unit for an air conditioner according to claim 1, wherein the air guide is located outside a side wall of the water receiver. 3. The indoor unit of an air conditioner according to claim 1, wherein the air guide is installed so that the main stream gradually spreads toward the outlet. 4. The air guide according to claim 1, wherein the distance from the side wall of the water receiver to the air guide is 1 from the side wall of the water receiver to the inner wall of the housing.
An indoor unit of an air conditioner, characterized in that it is set to be / 5 to 1/10. 5. The indoor unit for an air conditioner according to claim 1, wherein an inclined portion is provided at an upper end of the air guide to form a polygonal shape or an arcuate shape.