JPS62162830A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent the generation of turbulence noise and deterioration in the efficiency of a blower due to the turbulence noise, by a method wherein a wall is formed on the outside of an impeller with a given distance between the wall and the impeller, and the shape of the wall is formed into a spiral around the center of the impeller. CONSTITUTION:A wall 14 is formed in a spiral around the center of an impeller 5. Air, blown off from the impeller 5 and performing free eddy movement, restores pressure as it is decelerated along the wall 14, and is guided toward a heat exchanger 7. When air blown off from the impeller 5 is thrown in a free space, it performs free eddy movement. Thus, if the wall 14 extended along the flow of the air is formed as a guide wall to the outside, the wall is prevented from impeding the movement of the air; as a result, turbulence of a flow due to friction is prevented from occurring, and the flow of the air decreased in an energy loss and having excellent efficiency can be produced. This constitution enables sharp improvement of the efficiency of a blower, which is heretofore limited owing to noise.

Description

[Detailed Description of the Invention] The invention in the field of commercial application mainly relates to a centrifugal blade ffl'l having several blades arranged therein, and a heat exchanger arranged so as to surround this blade i1f. The present invention relates to an air conditioner having:

BACKGROUND OF THE INVENTION Conventionally, an air conditioner having a centrifugal impeller has, for example, a fifth
As shown in Fig. 6, a rectangular,
Alternatively, a heat exchanger is arranged in a circular shape, and the air heat exchanged by the heat exchanger is blown into the room from an outlet in at least one direction. 1 bite-
1 - In other words, the indoor air sucked in from the suction grille 3 in the direction of the arrow passes through the bell mouth 4 and then the blade 1
The heat is accelerated and pressurized by the heat exchanger 7, passes through the Suita passage 9 between the Suita outer wall 8 and the heat exchanger 7, and is again discharged into the same room from the Suita exit 10.

In addition, the Suita outer wall 8 and the Suita mouth 10 are dew 1 and 1, respectively.
In order to prevent this, it is covered with 1tlt thermal products 8a and 10a.

In addition, in the figure, 1 indicates an eye panel, 2 indicates a closed door, 6 indicates a fan motor for the wind circuit, and 11 indicates a water tray.

Problems to be Solved by the Invention However, the heat exchanger 7 must be provided with piping 7a and piping 7b, and the heat exchanger 7 must be disposed at all stations relative to the impeller 5. Therefore, as shown in Figure 6, a wall 12 that does not allow air to pass through is required.Furthermore, the space 13 created by providing this wall 12 is used for installing a power supply board or a drain pump, etc. In many cases, this wall 12 is effectively used as a space.However, this wall 12 is
Since the air blown from the wall 12 comes into direct contact with the wall 12, turbulent noise is likely to occur near the wall 12, and as a result, the efficiency of the blower is reduced.

Means for Solving the Problems Therefore, the technical means of the present invention to solve the problems of the above-mentioned conventional example, which are the generation of turbulence noise and the accompanying deterioration of blower efficiency, are as follows: A wall is provided at a predetermined distance from the impeller, and the wall has a spiral shape with respect to the center of the impeller.

For production The effect of this technical means is as follows.

That is, as shown in FIG. 2, the air blown out from the impeller 5 performs a free spiral motion when being thrown out into free space. Therefore, if a wall along this air flow is installed outside as a guide wall, the movement of the air will not be hindered, and as a result, the flow will not be disturbed due to friction, etc., and the air will be more efficient with less energy loss. You can get the flow.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

Components that are the same as those in the conventional example are designated by the same reference numerals and their explanation will be omitted.

FIG. 1 shows an embodiment of the invention. The air flow in this figure is the same as described in the conventional example, and its explanation will be omitted.

Here, the wall 14 is formed in a spiral shape with respect to the center of the impeller 5, and as shown in FIG. It then recovers its pressure while being decelerated and is guided to the sword of heat exchanger f'A device 7.

FIG. 3 shows an experiment conducted to examine the effects of the present invention. A wall 14 having a radius of curvature R2301 m is arranged around the impeller 5 at an angle of 90° with respect to the center of the impeller. Point Q is fixed and .

Therefore, the distance e2 between the outer diameter portion of the impeller 5 and the point Q is constant. The noise characteristics were investigated by changing the position of point P under these experimental conditions.

As shown in FIG. 4, the results show that the noise value is lowest near e1=4.5 inches. This almost matches the condition of air flow performing free spiral motion, and indicates that the flow in the vicinity of this wall 14 is smooth.

In this embodiment, the case where there is one heat exchanger 7 has been described, but a plurality of heat exchangers are similarly arranged so as to surround the blade +lf 5, and there is a gap between the end faces of each heat exchanger. Similar effects can be obtained even if the walls are arranged at a similar angle.

Effects of the Invention As described above, the present invention can provide a quiet air conditioner with excellent audibility by using a spiral wall between the end plates of a heat exchanger, and is accordingly free from noise limitations. This makes it possible to significantly improve the efficiency of the blower.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing a cross section seen from the top of an air conditioner showing an embodiment of the present invention, and Fig. 2 is a diagram showing the rotation direction of the centrifugal impeller in the same air conditioner and the direction of rotation thereof. FIG. 3 is a principle diagram showing the air flow; FIG. 3 is a plan view of the main part showing the experimental method used to obtain the effects of the present invention; FIG. 5 and 6 are a cross-sectional view and a partially cross-sectional plan view, respectively, showing a conventional example for explaining air flow. 1...[1+1 side panel, 2...Main body, 3...(Including G'J 7L, 4...Bellmaum, 5...・Impeller, 7... Heat exchanger, 9... Outlet passage, 10... Outlet, 13... Space, 14...・Wall. Agent's name: Patent attorney Toshi Nakao and 1 other person.
・One front panel 2 Body 5 - Impeller 5α --- Upper plate, --- 夛 (Female A Moxibustion device 11 - Water tray 14 - 11 Wall 2 Figure 4 Figure 5

Claims (1)

[Claims] A centrifugal impeller having a plurality of blades, a fan motor for driving the impeller, and an outside of the impeller,
In an air conditioner comprising an impeller, a heat exchanger disposed to surround the impeller at a predetermined distance, and an outlet that blows air carried by the impeller into the room. , a wall is provided on the outside of the impeller and is located between the end faces of the heat exchanger and has a predetermined distance from the impeller, and the wall has a spiral shape with respect to the center of the impeller. Air conditioner.