JPH0615241Y2 - Integrated air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an integrated air conditioner including a ventilation damper for introducing outside air to perform ventilation.

(Prior Art) Conventionally, in this type of integrated air conditioner 40, as shown in FIG. 7 and FIG. 8, a partition wall 10 is installed in each space portion where an indoor blower 11 and an outdoor blower 12 are provided. The partition wall 10 is provided with a ventilation damper 13 for introducing outside air.
For example, it is provided so as to be rotatable and openable and closable. Such an integrated air conditioner is a damper opening / closing lever provided on the operation box 14 by the user (user) when introducing outside air.
This is done by operating 15 to open the ventilation damper 13. In this case, the ventilation damper 13 is configured to be opened / closed manually by, for example, a wire, or to be opened / closed by driving a damper opening / closing motor (not shown) in conjunction with the operation.

In the figure, reference numeral 16 is an indoor temperature setting volume, 17 is an operation switch, 18 is an indoor air outlet, and 19 is a ventilation opening provided on the partition wall 10 and opened and closed by a ventilation damper 13.

(Problems to be Solved by the Invention) In the conventional ventilation device for the integrated air conditioner 40, the user (user) is configured to perform switching operation to introduce outside air each time. However, there was a problem that the operation was very complicated.

Generally, in an air conditioner in which outside air is introduced in this way,
The indoor heat load to be increased by ventilation by the ventilation device is expected, and the capacity is selected and set.
The actual air temperature may be higher (during cooling) or lower (during heating) than the outdoor air (outside air) temperature used as a criterion for selecting the capacity, which causes a problem of insufficient capacity. Moreover, according to this, when the ventilation damper 13 is opened at the start of the operation of the air conditioner, even if the above-mentioned insufficient capacity is not reached, only the amount of heat corresponding to the ventilation load corresponds to the indoor air temperature. However, there is a problem that it takes extra time to reach the desired temperature. In addition, even if the user turns off the air conditioner switch, if he forgets to close the damper, the indoors and outdoors communicate with each other, and the pressure difference between the indoors and outdoors causes rainwater to enter and unnecessary ventilation. There was also.

The present invention is intended to solve the above problems.

(Means for Solving the Problems) Therefore, the present invention is an integrated air conditioner equipped with a ventilation damper for introducing outside air to perform ventilation, and a damper motor for opening and closing the damper and a start-up time. The control unit controls the damper motor to close the damper and to open the damper after a predetermined condition is satisfied, and to control the damper motor to close the damper when the air conditioner is stopped. , Is a means for solving the problems.

(Function) Provide a control means for controlling the damper motor that opens and closes the ventilation damper, close the ventilation damper at the start of operation, and perform ventilation after the temperature indicated by the temperature sensor attached to the piping of the indoor heat exchanger reaches a predetermined temperature. The performance and operability can be improved by opening the damper to automatically introduce the outside air, and when the operation is stopped, closing the damper and then turning off the power of the air conditioner.

(Embodiment) The present invention will be described below with reference to the embodiments of the drawings. Figs. 1 to 6 show an embodiment of the present invention. In the drawings showing the embodiment of the present invention, the same parts as those in the prior art shown in FIGS. 7 and 8 are designated by the same reference numerals.

1 and 2, a partition wall 10 is provided on the indoor side so as to divide a space portion in which an indoor blower 11 and an outdoor blower 12 are provided, and the partition wall 10 is provided for introducing outside air. A ventilation damper 13 is rotatably provided with the upper end as a fulcrum. 18 is an indoor air outlet, and 19 is a ventilation port.
Reference numeral 20 denotes a lever, which is connected to the damper motor shaft. When the damper motor 21 rotates in the direction of the arrow in response to a signal from the damper motor control circuit 33 (FIG. 5), it rotates from the solid line position in FIG. 2 to the two-dot chain line position. Then, the ventilation damper 13 is opened. 22 is a limit switch, 34 is a limit switch actuator, and 37 is a return spring. Again 35
Is a cam integrated with the lever 20, and is fixed to the shaft of the damper motor 21 with a screw or the like not shown.

Next, the operation will be described.

When an operation command for the air conditioner is input from the operation switch 17 to the damper opening / closing command control circuit 32, the control circuit 32 sends a damper closing signal to the damper motor control circuit 33. After the start of operation, the temperature sensor 30 installed in the piping of the indoor heat exchanger 31
However, when it is detected that the indoor temperature has reached a predetermined temperature, the control circuit 32 sends a damper open signal to the control circuit 33. This operation is shown in FIG.

Next, the operation of the control circuit 33 will be described with reference to FIG. 4. The limit switch 22 is off when the actuator 34 is in the concave portion of the cam 35 and is on when the actuator 34 is in the convex portion. When an open signal is received from the control circuit 32 in the damper closed state, a start signal is first output to the damper motor 21, and the cam 35 driven by the damper motor 21 starts rotating. Further, when the limit switch 22 is in the on state, the cam 35 is rotated until it is turned off. Then, when the limit switch 22 is turned off,
A predetermined time value is set in the timer 36. After that, the cam 35 is rotated until the time set in the timer 36 has elapsed, and the ventilation damper is
When 13 is opened, the damper motor 21 is stopped.

Further, when the closing signal is received from the control circuit 32 in the damper open state, the damper motor 21 is stopped because the damper 13 is in the closed position when the limit switch 22 is off. However, when the limit switch 22 is on, the damper motor 21 is activated, the cam 35 is rotated until the limit switch 22 detects that it is off, and the limit switch 22 is turned off.
When the damper 13 is closed, the damper motor 21 is stopped.

By controlling the damper motor 21 as described above, at the start of operation, the ventilation damper 13 is initially closed,
When the temperature sensor 30 attached to the piping of the indoor heat exchanger 31 reaches a predetermined temperature, the damper 13 opens, so the outdoor blower 12
The outside air sucked by the air passes through the ventilation port 19 of the partition wall 10 and is sucked by the indoor blower 11 to blow out the indoor air outlet.
Blow out from 18. Further, the ventilation device, the sensor can also be substituted with a timer, after a certain period of time has elapsed since the ventilation damper 13 was closed at the start of operation (by a timer not shown), sends a damper open signal to the damper motor control circuit 33,
The ventilation damper 13 is opened by the same mechanism as above.

It is also possible to control by combining the sensor and a timer. That is, when the operation is started, the ventilation damper 13 is closed, and after a certain period of time has elapsed since the temperature sensor 30 reached a predetermined temperature, a damper open signal is sent to the damper motor control circuit 33, and the ventilation damper 13 is operated by the same mechanism as described above. Open.

By configuring to perform automatic ventilation as described above,
By shutting out the ventilation load at the start of air conditioning with a large load, the room temperature can be set to the set temperature in a short time. Also, if the air conditioner is turned off under ventilation,
The control circuit 32 sends a damper close signal, the damper motor control circuit 33 drives the damper motor 21, and the limit switch
When 22 is turned off, the damper motor 21 is turned off and the ventilation damper 13 is closed.

An example of the electric circuit diagram in FIG. 5 is shown in FIG. Sixth
In the figure, 17 is an operation switch, 21 is a damper motor, 22 is a limit switch, 30 is a temperature sensor, 50 is a flip-flop, 51 and 52 are multivibrators, 53, 54 and 55 are AND circuits, 56 and 57 are OR circuits, and 58. Is a comparator, 59 is a relay, 60 is a transistor, 61 is a DC power supply, and 62 to 66 are fixed resistors.

(Effect of the Invention) Since the present invention is configured as described in detail above,
The ventilation damper is closed at the start of operation, and ventilation is stopped until the temperature of the indoor heat exchanger reaches a specified temperature, and then automatic ventilation is performed. In addition to being able to effectively prevent pollution of indoor air, it is possible to prevent unnecessary ventilation and intrusion of rainwater due to forgetting to cut off. Further, by providing a control mechanism for controlling the damper motor, the outside air can be introduced automatically, and the performance and operability thereof can be effectively improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a ventilation device for an integrated air conditioner according to one embodiment of the present invention, FIG. 2 is a detailed view of a ventilation damper opening / closing mechanism, and FIGS. 3 and 4 are functions of a damper motor control circuit. 5 is an explanatory view showing the circuit configuration of FIG. 1, FIG. 6 is a specific electric circuit diagram of FIG. 5, and FIG. 7 is a front sectional view of a conventional integrated air conditioner. FIG. 8 is a sectional view of the same side. Description of main parts of the figure 10 …… Partition wall, 11 …… Indoor blower 12 …… Outdoor blower, 13 …… Ventilation damper 14 …… Operating box, 17 …… Operation switch 18 …… Indoor air outlet, 19 …… Ventilation port 20 …… Lever, 21 …… Damper motor 22 …… Limit switch, 30 …… Temperature sensor 31 …… Indoor heat exchanger 32 …… Damper opening / closing command control circuit 33 …… Damper motor control circuit 34 …… For limit switch Actuator 35 …… Cam 36 …… Timer 37 …… Damper lid spring

Claims (1)

[Scope of utility model registration request] 1. An integrated air conditioner equipped with a ventilation damper for introducing outside air for ventilation, wherein a damper motor for opening and closing the damper and the damper at the start of operation are closed to satisfy a predetermined condition. An integrated air conditioner comprising control means for controlling the damper motor so as to open the damper afterwards and for controlling the damper motor so as to close the damper when the air conditioner is stopped.