JPH0833228B2 - Variable constant air volume device for air conditioning - Google Patents

Description

TECHNICAL FIELD The present invention relates to a variable constant air volume device in air conditioning.

[Prior Art] The present applicant previously applied for an invention relating to a variable constant air volume device in air conditioning, and has been published as Japanese Examined Patent Publication No. 60-19409. In the present invention, even if a change in wind pressure occurs in the blower source and blower pipe, it is possible to always send a constant air volume from each outlet by automatic adjustment and to adjust the air volume by a thermostat, thereby achieving the object. are doing.

[Problems to be Solved by the Invention] However, in the above patented invention, the ventilation area formed by the ventilation holes of the outer cylinder and the inner cylinder varies depending on the degree of overlap of the ventilation holes, but the ventilation area corresponding to the change in room temperature. Needs to be reversed during cooling and heating. That is, in the case of cooling, the opening of the ventilation hole needs to be large when the room temperature rises, and in the case of heating, the opening of the ventilation hole needs to be small when the room temperature rises. Therefore, it is necessary to switch the rotation angle of the inner cylinder when switching from cooling to heating or vice versa, and this switching operation was performed manually or mechanically, which was inconvenient. .

Therefore, in the present invention, this switching operation is automatically performed during cooling or heating by using the shape memory alloy.

In addition, the angle of the inner cylinder can be adjusted according to the change in room temperature, and it can be easily adjusted by using the blown primary air by itself, and the cost of equipment can be significantly reduced. is there.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, in the above conventional variable constant air volume device, an air manipulator for taking in blast primary air in order to adjust the angle of the inner cylinder. A self-adjusting device having an indoor thermostat connected to the operating device is provided, and a cooling / heating switching device that can expand and contract with a shape memory alloy is mounted between a lever attached to the central shaft of the inner cylinder and the operating device.

The self-adjusting device is provided with an air manipulator on one side in the casing to connect a pressure guiding pipe for taking in the blown primary air, and a vent pipe of an indoor thermostat capable of adjusting the air pressure in the manipulator.

In addition, the cooling / heating switching device is provided with a connecting piece to be attached to the air operation device at one end of the cylindrical casing, a shaft hole at the other end to insert a spindle to be connected to the lever, and a coiled shape memory alloy in the casing. I have inserted it.

[Operation] In the present device configured as described above, since the shape memory alloy is in a contracted state during cooling, the spindle is also shortened, and the lever is set to a position where the ventilation hole becomes large as the lever rotates. Since the shape memory alloy is in an expanded state during heating, the spindle also expands, and the lever is set to a position where the ventilation hole becomes smaller as the lever rotates. Therefore, the inner cylinder is switched to a predetermined position at the same time as cooling or heating.

Further, in the operating device, the diaphragm operates by the pressure of the blown primary air, and the rotation angle of the inner cylinder can be adjusted by itself, and the operating range of the diaphragm can be adjusted by removing the air in the operating device by the thermostat.

[Embodiment] An embodiment will be described with reference to the drawings. Reference numeral 1 denotes a circular outer cylinder, and a ventilation portion long in the axial direction is provided on a front peripheral side (a front portion indicates an air inflow side in the drawing). A required number (7 in the drawing) of holes 2 are provided at regular intervals. Reference numeral 3 denotes a short tube connected to the front end of the outer cylinder, which is pivotally attached to the front end portion of the center shaft 5 by a bearing 4 provided on the front end surface side thereof, and the rear end surface side of the outer cylinder 1 is supported by a bearing 6 on the center shaft 5 side. It is pivotally attached to the rear end. The outer cylinder 1 is mounted in the casing 14 by its short tube 3.

Reference numeral 7 denotes an inner cylinder, and ventilation holes 8 of the same shape corresponding to the ventilation holes 2 of the outer cylinder 1 are provided at equal intervals on the rear side of the inner cylinder. A pressure receiving plate 9 is formed on the rear side of the inner cylinder, and a bearing 10 is provided at the center of the pressure receiving plate 9. At the same time, a bearing 11 provided on the front end side of the inner cylinder is mounted on the square rod portion 5 of the central shaft so that the outer cylinder is To be able to slide.

Reference numeral 12 denotes a conical spring fitted on the outside of the central shaft 5 between the bearing 6 and the pressure receiving plate 9, and the large-diameter end side thereof has a pressure receiving plate 9
The outer cylinder 1 and the inner cylinder 7 in contact with the
The ventilation holes 2 and 8 are configured to be aligned with each other.

Reference numeral 13 denotes a lever continuously provided at the rear end of the central shaft 5, and the ventilation area of the ventilation holes 2 and 8 can be adjusted by changing the rotation angle of the inner cylinder 7 by operating the lever.

Reference numeral 15 is a self-adjusting device for adjusting the rotation angle of the inner cylinder 7, and 16 is an air manipulator attached to one side of the casing 14, and the inside thereof is partitioned by a diaphragm 17. . 18 is an operating rod attached to the diaphragm, and 19 is a return spring. Reference numeral 20 is a pressure guiding pipe, one end of which is connected to the short pipe 3 portion and the other end is an operating device.
It was connected to 16 pressure chambers 21 so that primary air could be introduced into the inside 16 of the operating device. Reference numeral 22 denotes a thermostat that is installed in a suitable place in the room.By connecting the ventilation pipe 23 to the operating device 16 and opening / closing the thermostat 22 to remove air from the pressure chamber 21, the operating range of the diaphragm 17 can be adjusted. ing.

A cooling / heating switching device 24 is provided with a shaft hole 26 at one end of a cylindrical casing 25, and a connecting piece 27 for connecting to the operating rod 18 at the other end. A coil-shaped shape memory alloy that reversibly changes shape
While inserting 28, insert the spindle 29 into the shaft hole 26 and change the shape memory alloy 28 so that the length of the protruding portion of the spindle 29 is 2
It is designed to change to the 9'position. Reference numeral 30 indicates a spring for returning the spindle.

When the shape memory alloy 28 is in the contracted state during cooling, the lever 13 located at the position shown in FIG.
The spindle 29 is connected to the lever 13 so as to move to the position 13.

The lever 13 is set so that it can be normally opened and closed within the range of 13 to 13 'by operating the thermostat 22 during cooling or heating, but it is shaped so as to fully open the rotation angle of the inner cylinder as necessary. It may also constitute a memory alloy.
In the figure, 31 indicates a diffusion plate provided at the air outlet 32, 33 indicates a duct, and arrow F indicates the air flow direction.

EFFECT OF THE INVENTION Since the present invention is configured as described above,
The effects described below are produced.

Since the cooling / heating switching device is provided as in the configuration according to claim 1, the lever for operating the rotation angle of the inner cylinder is automatically set to a predetermined position at the same time as cooling or heating, and the self-adjustment device is provided. Therefore, by using the temporary air, the angle of the inner cylinder can be automatically adjusted by itself.

With the configurations according to claims 2 and 3, the structure is simple and the manufacture is easy.

Therefore, by implementing the present invention, the cost of the heating / cooling equipment can be significantly reduced and the operation is very convenient.

When the room is cooled in the winter season, the room temperature has dropped before the morning operation, and the variable constant air volume device is in the cooling operation. It takes time to raise. Therefore, hot air has been conventionally sent during warming up, but according to the present invention, the shape memory alloy can be set so that the rotation angle of the inner cylinder is fully opened by the hot air. Therefore, there is also an effect that the room temperature can be raised in a short time.

[Brief description of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side view in a state where wind pressure is applied, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is an explanatory view showing a state of a rotation angle of the inner cylinder with respect to the outer cylinder, and FIG. The state during cooling is shown, and FIG. 6 shows the state during heating. DESCRIPTION OF SYMBOLS 1 ... Outer cylinder, 2 ... Ventilation hole 5, 5 ... Central shaft, 7 ... Inner cylinder 8 ... Ventilation hole, 9 ... Pressure receiving plate 12 ... Conical spring, 13 ... Lever 14 ... Casing, 15 ... Self-adjusting device 16 ... Air Actuator, 17 ... Diaphragm 18 ... Actuating rod, 20 ... Pressure guide tube 22 ... Thermostat, 23 ... Ventilation tube 28 ... Shape memory alloy

Claims (3)

[Claims] 1. An outer cylinder, an inner cylinder, an adjusting spring, a self-adjusting device, and a cooling / heating switching device. The outer cylinder is pivotally attached to both side surfaces of the outer cylinder at a central axis and is equidistant in the circumferential axial direction. A required number of ventilation holes are provided for each, and the inner cylinder is provided with ventilation holes corresponding to the ventilation holes of the outer cylinder on the circumferential side and a pressure receiving plate on the rear side, and can slide in the outer cylinder. As described above, the adjusting springs are axially attached to the central axis on both end surfaces, and the adjusting spring is fitted on the outer side of the central axis between the outer cylinder rear end side and the inner cylinder pressure receiving plate, and is not connected to the outer cylinder while receiving no wind pressure. The ventilation holes of the inner cylinder are made to coincide with each other, and the self-adjusting device comprises an air operation device for taking in the blown primary air and an indoor thermostat connected to the operation device, and the cooling / heating switching device has a shape memory. It can be expanded and contracted with an alloy, and it can be mounted between the lever attached to the central shaft and the actuator. Variable constant air volume device in air conditioner which is characterized in that. 2. The self-adjusting device is provided with an air manipulator provided on one side in the casing to connect a pressure guiding pipe for taking in primary air blown, and a vent pipe of an indoor thermostat capable of adjusting the air pressure in the manipulator. The variable constant air volume device for air conditioning according to claim 1. 3. A cooling / heating switching device is provided with a connecting piece to be attached to an air handling device at one end of a tubular casing, a shaft hole at the other end to insert a spindle to be connected to a lever, and a coil-like member inside the casing. The variable constant air volume device for air conditioning according to claim 1 or 2, wherein a shape memory alloy is inserted.