JPH0451311Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a temperature-sensitive automatic wind speed adjustment installed at the air outlet of an air conditioner or at a point in the duct where it is necessary to increase the flow velocity if the temperature becomes high. Regarding the mechanism. This technology is particularly effective for air conditioning air outlets installed in the ceilings of large spaces and high ceiling areas.

(Prior art) In an air conditioner, the airflow from the air outlet in the ceiling is blown out slowly during cooling and quickly downward during heating in order to equalize the indoor temperature. .

Conventionally, such wind speed was controlled by controlling a damper using electricity, air pressure, etc. via a temperature sensing element in a chamber in front of the outlet, and when the temperature reached a high temperature, part of the flow path was closed to narrow the flow path area. It has been done well.

(Problems to be solved by the invention) With this conventional wind speed adjustment mechanism, there is a lot of noise due to wind noise at the tips of the damper blades, and the flow of air blown out is disturbed by the multiple damper blades. There were problems in that the pressure loss was large and the air flow could not be maintained at high speed up to the end of the duct, and the air flow blown out from the outlet could not be made sufficiently uniform and high speed.

(Means for Solving the Problems) It is an object of the present invention to provide a temperature-sensitive automatic wind speed adjustment mechanism for air conditioning that solves the problems of the present invention. In addition to dividing the flow of air inside the inner cylinder into the inside and outside of the inner cylinder, a ring large enough to be close to the inner peripheral surface of the duct is rotatably installed on the outside of the inner cylinder, and the ring and the inside of the duct are A flexible film such as heat-resistant cloth is attached between the surrounding surface in a U-shaped folded state, and a heat-sensitive actuator is installed that rotates the ring in response to the high temperature of the air inside the duct. When the air flow is, the ring is rotated by the operation of the heat-sensitive actuator, and the membrane body is twisted inward to block the outer flow path between the inner cylinder and the duct, and the air passes through the inner flow path. It is a temperature-sensitive automatic wind speed adjustment mechanism for air conditioning that is characterized by increasing the flow speed.

(Function) In this invention, when cooling or not heating, the heat-sensitive actuator is not activated, the ring remains in its initial state, and the flexible membrane is folded into a U-shape along the inner peripheral surface of the duct. Therefore, the air flow within the duct is divided into two flow paths, one inside and one outside the inner cylinder. In this case, the flow path area is large and the flow velocity is low.

Next, during heating, the air temperature rises and the heat-sensitive actuator is activated, rotating the ring and strongly twisting the flexible membrane, and the folded part moves toward the inner cylinder, causing it to move inside. The membrane adheres closely to the outer circumference of the cylinder and closes the space between the inner circumference of the duct and the outer circumference of the inner cylinder (see Figures 4 and 5), allowing the air in the duct to flow only through the passage inside the inner cylinder to increase speed. It is something.

(Example) Examples will be described below based on the drawings.

The embodiment shown in FIGS. 1 to 5 is an example in which a temperature-sensitive automatic wind speed adjustment mechanism 3 of the present invention is attached to a connecting portion between a round air outlet nozzle 1 and a round duct 2.

The inner cylinder 4 has a cylindrical shape, is arranged at the center of the duct 2, and is supported by a support member 5. The ring 6 is circular, has a diameter slightly smaller than the inner diameter of the duct 2, is disposed at the air introduction side end of the inner cylinder 4, and is pivotally supported at the center of the inner cylinder 4. The flexible membrane 7 attached between the ring and the inner peripheral surface of the duct is made of heat-resistant cloth, and is folded back to a length of about 1/3 of the duct diameter.

In the figure, 8 is a stay of the ring 6, 9 is a center board supported by the stay, 10 is a rotating shaft, 11 is a mounting board supported at the center of the air introduction side opening of the inner cylinder 4,
12 is a stay that supports the mounting board, and 13 is a bearing frame fixed to the mounting board 11 that pivotally supports the rotating shaft 10.

Next, a heat-sensitive actuator 14 that operates at a temperature of about 30° C. is fixed to the mounting board 11, and a rod 15 that expands depending on the temperature is engaged with a lever 16 mounted in the middle of the rotating shaft 10.

Also, a return spring 17 is installed so that the rod 15 returns when the heat sensitive actuator 14 does not operate.
is installed. In the figure, reference numeral 19 denotes a portion where the membrane body 7 is attached to the inner circumferential surface of the duct 2, and 20 is a portion where the membrane body 7 is attached to the outer circumferential wall of the inner cylinder 4.

In this embodiment, when only cooling or blowing air is used, the heat-sensitive actuator 14 does not operate, the ring 6 is in the initial position by the return spring 17, and the flexible membrane 7 is folded back into a U shape and attached to the inner peripheral wall of the duct. It's along. At this time, there is a space between the flexible membrane body 7 and the inner cylinder 4, forming a flow path. Air is in inner cylinder 4
It separates into an inner and outer part (see Figure 1).

Next, when heated air is flowed into the duct 2, the heat-sensitive actuator 14 is activated, and its rod 15 extends outward, pushing the lever 16 and rotating the rotating shaft 10 to which the lever is attached by about 45 degrees. Then, one peripheral edge of the ring 6 and the flexible membrane 7 whose peripheral edge is fixed to the ring is rotated, and the flexible membrane 7 is strongly twisted. If the flexible membrane body 7 is strongly twisted, the folded portion 18 of the flexible membrane body will move toward the inner cylinder, and if it rotates sufficiently, it will come into close contact with the outer peripheral wall of the inner cylinder 4. . Therefore, the annular outer flow path between the duct 2 and the inner cylinder 4 is closed, and the high temperature air is transferred to the inner cylinder 4.
The flow speed is increased only from the inside of the outlet nozzle 1.
It's something that comes out of nowhere.

(Effects of the invention) As described above, according to the invention, since a portion of the flow path in the duct is closed by twisting the flexible membrane, there is little wind noise and less noise. Furthermore, since the flow also closes the space around the inner circumferential surface of the duct, the flow remains symmetrical with less turbulence and pressure loss.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing the embodiment, Figure 2 is the first
3 is a perspective view showing the heat sensitive actuator, FIG. 4 is a plan view showing the flexible membrane in a twisted state, and FIG. 5 is a sectional view in the same state. 1... Outlet nozzle, 2... Duct, 3... Temperature-sensitive automatic wind speed adjustment mechanism, 4... Inner cylinder, 6... Ring, 7... Membrane body, 10... Rotating shaft, 14... Heat sensitive Actuator, 15... Lever, 16...
Rod, 17... Spring, 18... Folded part.

Claims (1)

[Scope of utility model registration request] An inner cylinder is installed inside the duct to divide the air flow inside the duct into the inside and outside of the inner cylinder, and a ring large enough to be close to the inner peripheral surface of the duct is rotated on the outside of the inner cylinder. A flexible film such as a heat-resistant cloth is attached between the ring and the inner circumferential surface of the duct, folded back into a large U-shape.
Moreover, a heat-sensitive actuator is installed that rotates the ring due to the high temperature of the air in the duct, and when the high-temperature airflow occurs, the ring rotates due to the operation of the heat-sensitive actuator, and the membrane body is twisted inward. A temperature-sensitive automatic air speed adjustment mechanism for air conditioning, which is characterized by closing an outer flow path between an inner cylinder and a duct to increase the air flow velocity passing through the inner flow path.