JPS63135729A - Indoor unit of air conditioner - Google Patents

Abstract

PURPOSE:To make a uniform distribution of flow speed in a heat exchanger, improve a heat exchanging characteristic and reduce noise in an indoor unit of a transverse flow type blower by a method wherein a vane wheel of the blower is arranged near a center of a length of stepwise direction of a heat exchanger. CONSTITUTION:An indoor unit is divided into some sections with a length of a step-wise direction of a heat exchanger 2 being divided in a range from 1:2-1:1 by a method wherein a center of axis of a vane wheel 1 of a blower is applied as an origin and y-axis 10 is crossed at a right angle with x-axis 9 in parallel with a heat exchanger 2. The heat exchange 2 and the vane wheel 1 are arranged within a main body 8 of the indoor unit in such a way as a blowing port 12 of the vane wheel 1 is approached in a direction where an area of the divided heat exchanger 2 is small. A stabilizer 4 is extended up to the blowing port 12 to form a separator 12. Each of a suction air passage 14 and a blowing air passage 13 is formed and the blowing air passage 13 is formed as a static pressure recovery air passage having a diffuser shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an indoor unit of an air conditioner, and particularly to an indoor unit having a cross-flow type blower.

[Conventional technology]

Many indoor units of air conditioners, especially those called room air conditioners, are manufactured in a wall-mounted form to save space when installing the indoor unit. In this type of indoor unit, it is practically important to make the depth dimension as short as possible to make it thin, and for this reason, many cross-flow type blowers that can have a short depth dimension are used.

In addition, in recent years, heat pump type air conditioners have become the main type in the market, and in order to remove floating warm air during heating, it is necessary to use downward blowing and high wind speed.

FIG. 3 is a side sectional view of a conventional indoor unit of an air conditioner disclosed in, for example, Japanese Patent Laid-Open No. 17645/1983. Third
In the figure, 11. f Impeller of cross flow type blower, 21.
These are TFI exchangers, and these are installed inside the indoor unit main body 8. 3 is a pipe pushed into the heat exchanger 1; 4 and 5 are guides forming the stabilizer of the blower and the back wall of the indoor unit; 6 is a circulating vortex in the impeller 1; 7 is a cross section of the impeller 1. It is a flow.

Next, the operation of this indoor unit will be explained. As the impeller 1 rotates, air circulation f, h6 occurs,
A cross flow 7 is induced around the circulating vortex 6, but only the cross flow 7 has a blowing effect, and this flow 7 passes through the heat exchanger 2. In this conventional indoor unit, the two pipes at the bottom 2n of the heat exchanger 2 are removed, and this part has one row of pipes, so the heat exchanger 2
The ventilation resistance at the lower part 2a is significantly smaller than that at the upper part 2b. Further, in a cross-flow blower, the flow around the circulating vortex 6 in the impeller 1 has the highest flow velocity, and the flow velocity becomes slower toward the outside.

Therefore, the lower part 2 of the heat exchanger 2 with the lowest ventilation resistance
The cross flow 7 is fastest near a, and the flow speed near the lower part 28 becomes faster and faster. As a result, 1f in front of heat exchanger 2
The i wind speed is maximum at the lower part 2a and minimum at the upper part 2b. Since the heat exchange amount of the heat exchanger is proportional to U"×C' (where U: front air volume, C: number of rows), the total heat exchange amount T)I-AIU"C'ds becomes air volume Q= If IUds is constant, υ will have a sharp peak.

[Problem that the invention seeks to solve]

As explained above, in a heat exchanger with a conventional cross-flow blower, the distribution of the suction flow velocity of the air flowing through the heat exchanger is uneven, so the total heat The amount of exchange is very small. And, in order to make the total heat exchange amount similar to that of a uniform suction flow velocity distribution, what is the rotation speed of the blower? ! The height of the blower must be increased to increase the air volume, and this poses a problem in that the noise of the blower increases.

This invention was made to solve the above-mentioned problems, and by making the distribution of the suction flow velocity of the heat exchanger uniform, the fan speed is low and the noise is low, while the overall The object of the present invention is to obtain an indoor unit for an air conditioner that can increase the amount of heat exchange.

[Means for solving problems]

The indoor unit of the air conditioner according to the present invention has a coordinate system with the impeller of the cross-flow type blower as the origin, the y-axis is a straight line passing through the origin and orthogonal to the heat exchanger, and the y-axis is the stage of the heat exchanger. The impeller and the heat exchanger were arranged at relative positions that divided the length in the direction from 1:2 to 1:1, and the direction in which the area of the heat exchanger divided by the y-axis was smaller was set as the blowing direction of the impeller. It is something.

[For production]

In the indoor unit of this invention, the impeller of the cross-flow type blower is placed closer to the center of the length of the heat exchanger in the stage direction than the conventional one, so that the blower does the most work. Since the section provides expansion tubes over a large area of the heat exchanger, the distribution of the suction flow rate of the heat exchanger is made uniform.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, the same reference numerals as in FIG.
The center of the axis of 8 is the origin (0), and in this coordinate system the origin (0)
The y-axis 10, which is perpendicular to the X-axis 9 that is in equilibrium with the heat exchanger 2 located in front of the impeller 8 through the At the same time, the heat exchanger 2 and the impeller 1 are arranged in the indoor unit main body 8 so that the air outlet 12 of the impeller 1 is located in the direction where the area of the divided heat exchanger 2 is smaller. Furthermore, a separator 11 is formed by extending the stabilizer 4 section of the blower to the blower outlet 12 to separate the suction side and the blower side of the blower, and a suction air passage 14 is formed between the separator 11 and the heat exchanger 2. Blow-off air passages 13 are formed between the catcher guides 5, and each of the blow-off air passages 13 is shaped like a diffuser to form a static pressure recirculation air passage. In addition, in FIG. 1, 7a to 7e indicate cross flow.

Next, the operation of this embodiment will be explained. When the impeller 1 rotates, a circulating vortex 6 and a cross flow 78 to 7 are generated within the impeller 1.
e occurs. The flow velocity distribution inside the cross-flow blower is 0 at the center of the circulating vortex 6, reaches a maximum at the outer periphery of the circulating vortex 6, and decreases monotonically outside of this, resulting in cross-flows 7a, 7b, 7c,
The flow velocity decreases in the order of 7d and 7e.

In this embodiment, the center of the impeller 1 is located at the heat exchanger 2.
Since it is located near the center of the rear, the lower half of the heat exchanger 2 exchanges heat with the cross-flows 7a, 7b, and 7c, which have high flow speeds, and is similar to a circulating vortex like a conventional indoor unit. Air flows almost uniformly from the lower half of the heat exchanger 2 without a large amount of air flowing from the heat exchanger portion.

In addition, in this embodiment, the upper half of the heat exchanger 2 is also closer to the impeller 1 than in conventional indoor units, so air is forced from the upper part of the heat exchanger to the lower impeller as in the conventional indoor unit. By smoothly sucking air into the upper part of the impeller 1 without being sucked in, the flow velocity in this part becomes high, and the flow velocity is made uniform in each part. Therefore, by equalizing the flow velocity of the air passing through the heat exchanger 2, the indoor unit of this embodiment has improved heat exchanger characteristics, and also reduces pressure loss, thereby reducing noise. According to the test results, it is optimal to place the center of the impeller 1 at the lower H-H position of the heat exchanger 2, and if the impeller 1 is placed above the lower line of the heat exchanger 2, Although the region where the cross flow is high speed increases further, this causes turbulence in the flow of air flowing into the impeller 1, which is not very preferable.

In this embodiment, the blowout air path 13 formed by the separator 11 and the catcher guide 5 is created by installing the impeller 1 higher than the conventional one and increasing the distance from the impeller 1 to the blowout port 12. The wind IP 113 can be used as a static pressure recovery channel. In other words, in a cross-flow blower, the work applied to the fluid is generated as a dynamic pressure component, so in order to effectively use the work produced by the blower, it is necessary to efficiently convert the dynamic pressure component into static pressure. In this embodiment, the blowout air passage 13 has a differential user shape, so dynamic pressure can be effectively converted into static pressure, the cross-flow type blower can be used with high efficiency, and noise can be further reduced. .

In the above embodiment, if the impeller 1 is placed above the pass of the heat exchanger 2, turbulence will occur in the inflowing flow, but in the invention of B, as shown in FIG. By forming the stabilizer 4 into an arc shape, it is possible to prevent disturbances in the flow of air flowing into the impeller 1, and by forming the stabilizer 4 into an arc shape, the stabilizer 4 with the fastest flow velocity can be prevented.
Separation when a nearby flow flows into the impeller 1 can be prevented. The configuration and operation of the embodiment shown in FIG. 2 other than those described above are the same as those shown in FIG. 1.

〔Effect of the invention〕

As explained above, this invention allows the shaft to pass through the impeller shaft.
The length of the heat exchanger in the step direction is 1:
Since the impeller and heat exchanger are arranged so as to be divided into 2 to 1:1, the flow velocity distribution of the heat exchanger is made uniform, thereby improving heat exchange characteristics and reducing noise. Moreover, it has the effect of increasing the total heat exchange amount.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an indoor unit of an air conditioner according to an embodiment of the present invention, Fig. 2 is a side sectional view showing an indoor unit according to an embodiment of the present invention, and Fig. 3 is a conventional air conditioner. FIG. 3 is a side sectional view showing the indoor unit of FIG. 1. Impeller, 2. Heat exchanger, 4. Stabilizer,
5...Rear guide (rear wall), 9...y axis, 10-...
Y-axis, 1 separator, 12...Blowout port, 13...Blowout air path, 14...Suction air path. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent: Masuo Oiwa (2 others) Fig. 1 1.9 1... Impeller 9... X-axis 2... X-axis 10... Y-axis 4... Stabilizer 11...・Separator 5...
・Rear guide 12...Air outlet Figure 2

Claims (3)

[Claims] (1) In an indoor unit of an air conditioner having a cross-flow type blower, in a coordinate system with the axis of the impeller of the blower as the origin,
A straight line passing through the origin and orthogonal to the heat exchanger is taken as the y-axis, and the impeller and the heat exchanger are arranged at relative positions where the y-axis divides the length of the heat exchanger in the stage direction at a ratio of 1:2 to 1:1. , an indoor unit of an air conditioner, characterized in that the blower is arranged in such a direction that the blowing direction of the impeller is the direction in which the area of the heat exchanger divided by the y-axis is smaller. (2) In a cross-flow type blower, a separator that separates the suction side and the blowout side of the blower is formed by an extension of the stabilizer part, and a suction air path is formed between the separator and the heat exchanger, and a separator is formed between the separator and the indoor unit. The indoor unit of the air conditioner according to claim 1, wherein a blowout air path is formed between the rear walls, and each of the blowoff air paths is shaped like a diffuser. (3) The cross-flow blower is an indoor unit of an air conditioner according to claim 1 or 2, in which the stabilizer portion is formed to have an arcuate cross section.