JPS6362668B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an air conditioner, more specifically, a heat exchanger, a fan, and a damper for opening and closing the heat exchanger, the air conditioner is equipped with a heat exchanger, a fan, and a damper that opens and closes the heat exchanger, and cools the air conditioner by flowing a cooling medium through the heat exchanger.
In addition, heating is performed by flowing a heating medium, and
The present invention relates to an air conditioner that controls heating and cooling capacity by opening and closing the damper.

Conventionally, devices have been provided that use a damper as described above and control the heating and cooling capacity by opening and closing the damper. It is also performed mechanically using a link mechanism or a wire transmission mechanism.

In the case of the former, where the damper is electrically operated, the damper can be opened and closed automatically according to the indoor temperature, but during cooling operation, the damper is opened and closed when the temperature becomes higher than the set value. Conversely, during heating operation, if the temperature rises above the set value, the damper must be driven to the closed side, so it is necessary to switch the opening/closing control of the damper in response to these heating and cooling operations. However, the use of electrical wiring increases the cost, and requires electrical wiring work, which further increases the cost.

In addition, in the case of mechanically opening and closing the damper as in the latter case, the cost is lower than that of the former method because it is manual operation, but on the other hand, there is a problem that the damper cannot be opened and closed automatically according to the indoor temperature. Ta.

The present invention was devised in view of the above-mentioned conventional problems.The purpose of the present invention is to use a simple structure to automatically open and close the damper according to the indoor temperature, without switching it according to the cooling/heating operation. The object of the present invention is to provide a low-cost air conditioner in which the damper can be opened and closed.

That is, the present invention uses a temperature sensor consisting of a temperature sensing part sealed with a fluid that thermally expands as the temperature rises, and an actuation part that operates in response to the thermal expansion of the fluid, and The movement of the parts is transmitted to the damper by a transmission mechanism, and
The transmission mechanism is provided with a reversing mechanism that reverses the transmission direction in the middle of one-way operation of the actuating part and reversing the transmission direction with respect to the operating direction of the actuating part, so that the damper can be changed from open to closed in the one-way movement of the actuating part. It is characterized by being controlled from closed to open.

Next, an embodiment of the air conditioner of the present invention will be described based on the drawings.

The one shown in Fig. 1 is a fan coil unit, which has an inlet 2 on the bottom of the main casing 1 and an outlet 3 on the top, and has a heat exchanger 4 and a fan 5 inside.
A damper 6 is provided on the windward side of the heat exchanger 4 to open and close the heat exchanger 4.

The damper 6 is supported by the side wall 1a of the main body casing 1 via a damper shaft 7 so as to be freely openable and closable, and the damper shaft 7 is located near an upper corner of the heat exchanger 4 disposed in an inclined direction. established in
Due to the rotation of the damper shaft 7, the damper 6
is controlled to open and close between a fully open position shown by a solid line in FIG. 1 and a fully closed position shown by a dotted line in FIG.
The fully open position closes the short-circuit passage 8 formed between the upper part of the heat exchanger 4 and the rear wall 1b of the main body casing 1, and leaves the heat exchanger 4 as far away from the heat exchanger 4 as possible. The fully closed position is a position in which the short-circuit passage 8 is opened and the air passage 9 passing through the heat exchanger 4 is closed by covering the heat exchanger 4.

Furthermore, during cooling, a cooling medium such as cold water or a low-pressure liquid refrigerant from a refrigeration system is passed through the heat exchanger 4, and during heating, hot water, steam, or discharge gas from a refrigeration system is passed through the heat exchanger 4.

Note that when cold water and hot water are used as the cooling and heating medium, a heat recovery type refrigeration system is mainly used, and when a low pressure liquid refrigerant and discharge gas are used, a heat pump type refrigeration system is used.

When using a heat pump type refrigeration system, the heat exchanger 4 functions as an evaporator during cooling and a condenser during heating, and has a balance with the heat source side heat exchanger, which functions as a condenser during cooling and an evaporator during heating. Therefore, it is preferable to apply it to a multi-chamber heat pump type refrigeration system.

In the air conditioner configured as described above, the present invention allows opening and closing of the damper 6 with a simple configuration,
Moreover, it can be opened and closed automatically according to the indoor temperature, and can be opened and closed without switching according to the air-conditioning operation. A temperature sensor 10 comprising an actuating part 12 that operates in response to thermal expansion of the temperature detector 10 is used, and the operation of the actuating part 12 in the temperature detector 10 is transmitted to the damper shaft 7 of the damper 6 by a transmission mechanism 20. In addition, the transmission mechanism 20 is provided with a reversing mechanism 21 that reverses the movement of the actuation part 12 in one direction and reverses the transmission direction with respect to the movement direction of the actuation part 12. The one-way operation is controlled from open to close and from close to open.

Next, an embodiment of the opening/closing control mechanism for the damper 6 constructed as described above will be described based on FIGS. 2 and 3.

What is shown in FIGS. 2 and 3 includes a substrate 50 fixed to the side wall 1a of the main casing 1, and a substrate 50 fixed to the side wall 1a of the main body casing 1.
The temperature sensor 10 is attached to the case 51 with a fixing means such as a screw, and the transmission mechanism 20 is attached to the board 50 with a pin to be described later. The opening/closing control unit is constructed as if it were a cover, and the board 50 of this unit is fixed to the side wall 1a of the main body casing 1 with fixing means such as bolts, so that it can be easily assembled.

Further, the temperature detector 10 shown in FIG. 2 includes the temperature sensing portion 11 from a temperature sensing tube 13 and a container 15 having an expansion chamber 15a communicating with the temperature sensing tube 13 via a pipe 14. In addition, the operating section 12
is composed of a piston 16 that operates by thermal expansion of the fluid in the expansion chamber 15a, a rod 17, and a cylinder 18 that houses the piston 16, and the cylinder 18 is connected to the container 15 by screwing means, A mounting block 52 fixed to the case 51 with a fixing means such as a bolt is provided, and the cylinder 1 is attached to the mounting block 52.
8 is attached by screwing means, and a return spring 19 is interposed between the piston 16 and the mounting block 52.

Therefore, the piston 16 and the rod 17
moves in one direction (to the right in Figure 2) when the temperature rises due to thermal expansion of the fluid in the temperature sensing section 11, and moves in the other direction (to the left in Figure 2) by the return spring 19 when the temperature decreases. It is something to do. Note that a liquid incompressible fluid is used as the fluid.

Further, the transmission mechanism 20 uses a link mechanism that converts horizontal movement of the piston 16 and rod 17 into vertical movement, and a conversion mechanism that converts this vertical movement into rotational movement.

The link mechanism includes three links 22, 23,
24 are combined to form the reversing mechanism 21.One link 22 is made long, and its lower end is pivotally connected to the board 50 via a pin 25, and the lower end of this link 22 is Said rod 17
It is inserted between the pins 28 and 29 of an interlocking body 30 formed by a pair of arms 26 and 27 connected to the tips of the interlocking body 30 and interlocking pins 28 and 29, and
A guide groove 22a is formed at the upper end of the link 22, and the link 23,
24 is inserted and fitted freely.

Further, among the links 23 and 24, the lower link 23 has one end pivotally connected to the base plate 50 via a pin 32, and the upper link 24 has one end connected to the transmission body constituting the conversion mechanism. 41 via a pin 33, and both the links 23 and 24 are connected to the guide groove 2 of the long link 22.
The toggle joint mechanism is constructed by assembling the toggle joint mechanism in a triangular shape with the connecting pin 31 inserted into the connecting pin 2a as the apex.

In FIGS. 2 and 3, reference numeral 34 denotes a guide body for the upper link 24, and a long hole 35 is provided in the center for guiding the pin 33 in the vertical direction. When the upper link 24 is inserted and operated, it guides the pin 33 in the vertical direction.

Further, the transmission body 41 of the conversion mechanism shown in FIGS. 2 and 3 uses a wire or a flexible band plate,
The lower end of this transmission body 41 is connected to the upper end of the upper link 24 by the pin 33, and the upper end is connected to the damper shaft 7 by a screw 43 on the outer peripheral surface of the winding body 42, which is keyed or spline connected. It is fixed.

The winding body 42 causes the damper shaft 7 to protrude through a through hole provided in the substrate 50 and is fixed to this protrusion, and between the winding body 42 and the substrate 50, A winding spring 44 is interposed to urge the winding body 42 in the winding direction of the transmission body 41.

This take-up spring 44 has a force that moves the damper 6 from the fully open position to the fully closed position.The take-up spring 44 always urges the transmission body 41 and the upper link 24 upward, and as a result, the above-mentioned The long link 22 is also urged in its swinging direction, and the long link 22 is biased toward the interlocking pin 2.
It is in contact with one of 8 and 29. Note that the return spring 19 is stronger than the take-up spring 44.

Therefore, in the state shown in FIG. 2, the indoor temperature is low and the damper 6 is fully open, and the lower end of the long link 22 is connected to the winding spring 44.
The interlocking pin 29 is brought into contact with the interlocking pin 29 by the action of .

When the indoor temperature rises from this state, the fluid sealed in the temperature sensing part 11 of the temperature detector 10 thermally expands due to this temperature rise, and this thermal expansion causes the rod 17 in the actuating part 12 to move toward the return position. It moves to the right in FIG. 2 against the force of the spring 19.

Due to this movement of the rod 17, the long link 22 swings counterclockwise under the action of the winding spring 44, and the links 23 and 24 connected to the link 22 change from a triangular shape to a straight shape. It transforms.

Further, the long link 22 is the link 2
3 and 24 are lined up in a straight line, these links 2
3 and 24, it is reversed as shown by the chain line in FIG. 2, and due to this reversal, the link 2
3 and 24 are transformed into triangular shapes again.

Note that when the long link 22 is reversed and deformed into a triangular shape again after the links 23 and 24 are deformed into a straight line, the lower end of the long link 22 may come into contact with the interlocking pin 28. The movement of the rod 17 is forcibly transmitted to the elongated link 22 via the interlocking pin 28, causing the link 22 to swing.

Further, due to the deformation of the links 23 and 24 from a triangular shape to a straight shape, the upper end portion of the upper link 24, that is, the pin 33 connected to the transmission body 41
The pin 33 moves upward from the lowest position to reach the highest position in a straight line, and when the long link 22 is reversed and deforms from a straight line to a triangular shape again, the pin 33 rises to the highest position. The rod 17 moves downward from this position, and reaches the lowest position at the end of the rightward movement of the rod 17.

The upward movement of the pin 33 causes the winding body 42 to rotate under the action of the winding spring 44, swinging the damper 6 from the fully open position to the fully closed position via the damper shaft 7. When the pin 33 is at its highest position, the damper 6 is fully closed.

Further, due to the downward movement of the pin 33, the winding body 42 rotates against the winding spring 44, swinging the damper 6 from the fully closed position to the fully open direction. At the lowest position, the damper 6 is fully opened.

Further, when the fluid in the temperature sensing section 11 thermally contracts due to a drop in temperature, the return spring 19 moves the rod 17 to the left. This leftward movement of the rod 17 is similar to the rightward movement described above, in which the links 23 and 24 are deformed from a triangular shape to a linear shape, and then deformed to a triangular shape again, and the pin 33 connected to the transmission body 41 is After moving upward from the lowest position to the highest position, the link 22 is reversed to move it downward from the highest position to the lowest position.

In this case, the long link 22 swings in a clockwise direction, and the lower end of the long link 22 is in contact with the interlocking pin 28 due to the action of the take-up spring 44 at the start of the swing.

Moreover, what is shown in FIGS. 2 and 3 is the interlocking body 3.
The distance between the interlocking pins 28 and 29 at 0 is made larger than the width of the lower end of the long link 22, so that when the long link 22 is reversed, the movement of the rod 17 in the actuating section 12 is controlled by the damper 6. A non-transmission area P is provided in which no transmission occurs, so that the closed state is maintained when the damper 6 is switched from open to closed and from closed to open.

That is, the damper 6 shown in FIGS.
In other words, the operation from opening to closing of the link 23,
24 into a linear shape is performed by the action of the winding spring 44, and the swinging of the long link 22 follows the movement of the rod 17 by the action of the winding spring 44. The lower end of the elongated link 22 contacts one of the interlocking pins 28 and 29, and the operation of the damper 6 from closing to opening;
In other words, the links 23 and 24 are forcibly deformed into a triangular shape by the movement of the rod 17 against the take-up spring 44.
The lower end of the long link 22 is connected to the interlocking pin 2.
The contact will be changed from one of 8 and 29 to the other.

Therefore, by making the interval between the interlocking pins 28 and 29 larger than the width of the lower end of the elongated link 22 to provide play (non-transmission area), even if the rod 17 is in motion, First, the damper 6 will not operate.

That is, the adjustment range by the temperature detector 10 is 14
℃ to 34℃, and the rod 17 in the actuating part 12
If the stroke of Fully open (60°) in the low temperature range of
It operates from fully closed (0 degrees), remains fully closed in the medium temperature range of 22°C to 26°C, and changes from fully closed to fully open in the high temperature range of 26°C to 34°C. Note that this is a case where the opening degree of the damper 6 is set to 0 to 60 degrees.

As described above, since the damper 6 is opened and closed using the thermal expansion of the fluid sealed in the temperature sensing part 11 of the temperature detector 10 as a driving source, a driving source such as a motor is not required and the cost is low. However, the damper 6 can be controlled from open to closed and from closed to open by the one-way movement of the actuating part 12 caused by the thermal expansion of the fluid. By utilizing the open/open control for adjustment during cooling, the damper 6 can be opened and closed without the need for switching depending on the cooling/heating operation.

In the embodiments described above, a wire, a strip plate, or the like is used as the transmission body 41 of the conversion mechanism, but it may be formed of a rigid material as shown in FIGS. 4 and 5.

The one shown in FIG. 4 uses a rack 45, a pinion 46 instead of the winding body 42, the rack 45 is connected to the upper link 24 with a pin 33, and the pinion 46 is connected to the damper shaft 7. It is a key combination.

In this configuration, the winding spring 44 is not used, and the opening and closing of the damper 6, in other words, the deformation of the links 23 and 24 is performed by the actuating portion 1.
This is forcibly performed by the operation of the rod 17 at step 2.

Further, in the above configuration, when providing a non-transmission area P, a tooth-missing portion is provided at the lower part of the rack 45 or on one side of the pinion 46, and the rack 45 is located slightly before the highest position of the pin 33. is pinion 4
It is constructed so that it slides against the 6.

5 uses a transmission link 47, an arm 48 is used instead of the winding body 42, the transmission link 47 is connected to the upper link 24 with a pin 33, and the arm 48 is connected to the upper link 24 with a pin 33. The boss is keyed to the damper shaft 7 and the transmission link 4
7 and an arm 48 are connected by a pin 49.

In this case as well, the take-up spring 44 is not used.

In addition, when providing a non-transmission area P in the above configuration, the elongated hole 47a is provided at the lower end of the transmission link 47.
The pin 33 is inserted into and connected to the elongated hole 47a, and an elastic body 47b having a force greater than the opening/closing torque of the damper 6 is provided between the upper end of the elongated hole 47a and the pin 33. It is to intervene.

In this case, the damper 6 is fully closed in front of the highest position of the pin 33, and fully closed is restricted by a stopper or the rear wall 1b of the main body casing 1, and the damper 6 is fully closed. Until this occurs, the elastic body 47b does not bend, and the pin 33 rises to operate the transmission link 47 and close the damper 6. Further, even after the damper 6 is fully closed, the pin 33 rises, but at this time, the damper 6 is restricted by the stopper or the rear wall 1b of the main body casing 1, so the elastic body 47b is bent and the pin 33
Only the damper 6 rises to the highest position, and the damper 6 can be maintained in the closed state.

Further, although the temperature sensor 10 of the embodiment described above uses the piston 16, a diaphragm may be used and the rod 17 may be directly connected to the diaphragm.

As described above, the present invention opens and closes the damper 6 by utilizing the thermal expansion of the fluid that expands as the temperature rises, so there is no need for a drive source such as a motor, and therefore the structure is simple and low cost. This makes it possible to eliminate the need for electrical wiring work.

Furthermore, it has a reversing mechanism 21 that reverses the operation of the actuating part 12 in the temperature sensor sealed with the fluid during one-way operation of the actuating part 12, and reversing the transmission direction with respect to the operating direction of the actuating part 12. Since the transmission mechanism 20 is linked to the damper 6 and the damper 6 is controlled from open to close and from close to open in one-way operation of the actuating section 12,
While the opening and closing of the damper 6 can be controlled according to the indoor temperature, the opening and closing of the damper 6 can be controlled without performing a switching operation between cooling operation and heating operation.

Therefore, there is no need for a switching device that switches control depending on cooling operation and heating operation, as in the conventional example in which the damper is electrically controlled to open and close by a motor.
This makes it possible to further reduce costs.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the air conditioner of the present invention, FIG. 2 is a partially cutaway front view showing an embodiment of the damper opening/closing control mechanism, and FIG. The cross-sectional view, FIGS. 4 and 5 are as follows:
An explanatory diagram of only the main parts showing another embodiment of a damper opening/closing control mechanism, FIG. 6 is a temperature-stroke characteristic diagram of a temperature detector, and FIG. 7 is a damper operation characteristic diagram. 4... Heat exchanger, 5... Fan, 6... Damper, 10... Temperature detector, 11... Temperature sensing section, 12
... Actuation part, 20 ... Transmission mechanism, 21 ... Reversing mechanism, P ... Non-transmission area.

Claims (1)

[Scope of Claims] 1. A heat exchanger 4, a fan 5, and a damper 6 that opens and closes the heat exchanger 4. A cooling medium is supplied to the heat exchanger 4 for cooling, and a heating medium is supplied to the heat exchanger 4 for cooling. This is an air conditioner that performs heating by flowing water and controls the heating and cooling capacity by opening and closing the damper 6, and includes a temperature sensing part 11 filled with a fluid that thermally expands as the temperature rises, and a temperature sensitive part 11 that responds to the thermal expansion of the fluid. Temperature detector 1 consisting of an operating section 12 that operates as
0 and a transmission mechanism 20 that transmits the operation of the actuating section 12 to the damper 6, the transmission mechanism 20
is reversed during one-way operation of the actuating part 12,
The damper 6 includes a reversing mechanism 21 that reverses the transmission direction with respect to the operating direction of the actuating part 12, and
An air conditioner characterized in that the one-way operation of the operating section 12 is controlled from open to close and from close to open. 2 Transmission mechanism 20 that includes a reversing mechanism 21 and transmits the operation of the actuating section 12 of the temperature detector 10 to the damper 6
When the reversing mechanism 21 is reversed, the actuating portion 12
A non-transmission area P in which the operation of is not transmitted to the damper 6.
2. The air conditioner according to claim 1, wherein the damper 6 is maintained in a closed state when the damper 6 is switched from open to closed and from closed to open.