JP2789936B2 - Control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Field of the Invention The present invention is relates <br/> the equipment to control the air conditioner for performing ventilation and air conditioning in combination ventilator.

[0002]

2. Description of the Related Art FIGS. 1 and 4 show, for example, Japanese Patent Application No. 3-270.
FIG. 1 is a view showing a conventional air conditioner disclosed in Japanese Patent Publication No. 800, FIG. 1 is a longitudinal sectional view of a building in which the air conditioner is installed, and FIG. 4 is a block diagram of an indoor unit controller.

In FIG. 1, (1) is a building, (2) is a building (1).
An indoor air inlet (3) and an indoor outlet (4) are provided on the ceiling of the room. The wall of the building (1) is provided with an outside air intake (5) and an indoor air exhaust (6). (7)
Is a ventilation device installed in the ceiling (2).
A) and an exhaust fan (7B), the windward side of the intake fan (7A) is connected to the outside air intake (5) by a duct (8),
The leeward side of the exhaust fan (7B) is connected to the indoor air exhaust port (6) by a duct (9).

[0004] (10) is an indoor unit of a separate type air conditioner installed in the ceiling (2), which has a heat exchanger (10A) and a blower fan (10B). Together with the outdoor unit (11) installed outside the building (1) constitutes a part of the refrigeration cycle. The leeward side of the intake fan (7A) is connected to the intake port of the indoor unit (10) by a duct (12). In addition, duct (1
2) is connected to the indoor air suction port (3) by a duct (13), and the duct (13) is connected to the windward side of the exhaust fan (7B) by a duct (14). The leeward side of the blower fan (10B) is connected to the indoor outlet (4) by a duct (15).

(16) is a ventilator controller for controlling the operation of the ventilator (7), (17) is an indoor unit controller for controlling the operation of the indoor unit (10), and both controllers (16) and (17) are signal lines ( 1
8) interconnected.

In FIG. 4 , (21) is a microcomputer (hereinafter referred to as a microcomputer) for performing arithmetic processing according to a predetermined program, and (23) is constituted by switches and the like, and is used for ventilation operation, cooling / heating operation, ventilation cooling / heating operation, and total stop. An operation command generation circuit that generates four types of operation commands and inputs them to the microcomputer (21), (24) is a fan drive circuit that drives the blower fan (10B) by the output of the microcomputer (21), and (25) is the same. It is a ventilator control data transmission circuit that transmits control data to the ventilator (7).

[0007] The control device of a conventional air conditioner is configured as described above, and its operation will be described. When ventilation operation is instructed by the operation command generation circuit (23), the fan drive circuit (24) drives the blower fan (10B) and the ventilation device control data transmission circuit (25) outputs an appropriate output. Generate and operate the ventilator (7). Operation command generation circuit (23)
When the cooling and heating operation is instructed by the fan drive circuit (24)
The fan (10B) is driven by the
(11) A compressor, a four-way valve and the like (all not shown) are controlled to perform a cooling / heating operation. Further, a ventilation device stop command is output by the ventilation device control data transmission circuit (25), and the ventilation device (7) is stopped.

When a ventilation cooling / heating operation is instructed by the operation command generation circuit (23), the fan driving circuit (24) operates the blower fan (10B) and controls the compressor, the four-way valve and the like to control the cooling / heating operation. drive. Further, the ventilator control data transmission circuit (25) generates an appropriate output to operate the ventilator (7). When all stop is instructed by the operation command generation circuit (23), the fan drive circuit (24) causes the blower fan (10B)
And the ventilator control data transmission circuit (25)
Outputs a ventilator stop command to stop the ventilator (7). In other words, when operating the ventilation device (7), regardless of the presence or absence of an operation command to the indoor unit (10), the ventilation fan (10
Drive B).

When the ventilator (7) operates, the intake fan
(7A), outside air is sucked from the outside air intake (5), passes through the duct (8), and then passes through the duct (12) to the indoor unit (1).
0) is supplied to the suction side. In addition, the outside air is a blower fan
By (10B), the air is blown into the room from the indoor outlet (4) through the duct (15). On the other hand, indoor air is
It is sucked from (3) and supplied to the suction side of the indoor unit (10) through the duct (13). It is discharged outside through the exhaust port (6). Here, if the indoor unit (10) is performing cooling or heating operation, heat exchange is performed by the heat exchanger (10A), and cool air or warm air is blown into the room from the indoor outlet (4).

In a heating operation in winter, the heat exchanger (not shown) of the outdoor unit (11) is cooled and frost adheres to the surface thereof. , The refrigerant circuit is switched to change the heating cycle to the cooling cycle).

FIG. 5 shows, for example, Japanese Patent Application Laid-Open No. 62-6903.
FIG. 2 is a vertical sectional view of a building showing another example of the control device of the conventional air conditioner shown in Japanese Patent Publication No. 1 and the same parts as those in FIG.

In the figures, (26) and (27) are ducts, respectively.
(8) A damper installed in (9) that switches the air flow.
The damper (26) is located on the windward side of the blower fan (10B).
7) is also located on the leeward side. (28) and (29) are dampers provided in the ducts (13) and (15), respectively.
Is located on the windward side of the blower fan (10B), and the damper (29) is also located on the leeward side.

Next, this operation will be described. Damper (28) (2
9) is opened and the dampers (26) and (27) are closed, so that the room air is sucked from the room air inlet (3) by the blower fan (10B) and enters the duct (15) from the duct (13). , Heat exchange in the heat exchanger (10A), cool air or warm air
From the room. Next, the dampers (26) and (28) are opened at appropriate opening degrees, and the opening degrees of the dampers (27) and (29) are adjusted appropriately to reduce the amount of air sucked by the blower fan (10B). The part is discharged from the indoor air exhaust port (6) to the outside through the duct (9). The remaining air is heat-exchanged in the heat exchanger (10A) and blown out from the indoor outlet (4), so that it is possible to perform ventilation while cooling or heating. If the heat exchanger (10A) is stopped, only ventilation will be performed.

[0014]

Among the above-mentioned conventional air conditioner control devices shown in FIGS. 1 and 4 , the outside air is taken into the indoor unit (10) from the ventilation device (7). However, during the defrosting operation, the indoor heat exchanger (10A) is cooled by the reversal of the refrigeration cycle.Thus, when the defrosting operation is performed during the heating operation in winter, the cool air flows into the room. There is a problem that it is blown out and gives the user discomfort.

Further, the present invention shown in FIG. 5, the damper (26) to
In (29), since the ventilation operation and the cooling / heating operation are performed by switching, if the air conditioner for performing the ventilation and the cooling / heating is installed independently, there is a problem that the operation is troublesome.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent cold air from blowing out into a room even if a defrosting operation is performed during a heating operation in winter, and a ventilation device can be easily operated. and to provide a control equipment of the air conditioner to allow operation of the indoor unit and.

[0017]

A control device for an air conditioner according to a first aspect of the present invention includes a fan stopping means for stopping a blower fan during a defrosting operation during a heating operation;
Ventilation stop means for stopping the ventilation device .

[0018]

According to the first aspect of the present invention, since the blower fan and the ventilator are stopped during the defrosting operation during the heating operation, even if the heat exchanger of the indoor unit is cooled, the cool air is blown into the room. Never blow out .

[0019]

[Embodiment 1] 1 to 3 show an embodiment of the first invention of the present invention. FIG. 1 is a longitudinal sectional view of a building, FIG. 2 is a block diagram of an indoor unit controller, and FIG. The same parts as those in the conventional device are denoted by the same reference numerals. In FIG. 2, reference numeral (22) denotes an outside air intake / existence circuit which is constituted by a switch or the like and inputs the presence / absence of outside air intake to the microcomputer (21).

Next, the operation of the first embodiment will be described with reference to FIG. First, in step (41), initial settings for the control operation are performed. In step (42), an operation command is input from the operation command generation circuit (23), and it is determined in step (43) whether to perform ventilation operation. When performing the ventilation operation, it is determined in step (44) whether the air conditioner is currently performing a defrosting operation in the heating operation. If the defrosting operation is not being performed, an operation command is output from the ventilator control data transmission circuit (25) to the ventilator (7) in step (45). When it is determined in step (44) that the defrosting operation is being performed, or when it is determined in step (43) that the ventilation operation is not performed, the process proceeds to step (46), and the ventilation device control data transmission circuit (25) Outputs a stop command to the ventilation device (7).
Here, steps (44) and (46) correspond to ventilation stop means.

In step (47), it is determined whether to perform the cooling / heating operation. If the cooling / heating operation is to be performed, the process proceeds to step (48) to control the compressor and the four-way valve to perform the cooling / heating operation. Step (49)
Then, it is determined whether the air conditioner is currently performing a defrosting operation. If the air conditioner is performing a defrosting operation, the process proceeds to step (53), and the blower fan (10B) is stopped by the fan drive circuit (24). If not, proceed to step (50) to set the fan drive circuit.
The fan (10B) for blowing air is operated by (24). Here, steps (48), (49), and (53) correspond to fan stopping means.

If it is determined in step (47) that the cooling / heating operation is not to be performed, the process proceeds to step (51), where it is determined whether the ventilation operation is to be performed. If the ventilation operation is not to be performed, the process proceeds to step (53) and the blowing fan (10B) To stop. When performing the ventilation operation, proceed to step (52), determine the set value of the outside air intake presence / absence setting circuit (22), and when the outside air intake is set to `` absent '', proceed to step (53) to blow the air. Stop the fan (10B). When the intake of outside air is set to `` Yes '', that is, when outside air is taken into the indoor unit (10) from the ventilator (7) and blown out to the room, go to step (50) and
(10B) Drive. Then, when the steps (50) and (53) are processed, the process returns to the step (42).

As described above, in the defrosting operation during the heating operation, the blower fan (10B) and the ventilation device (7) are stopped, so that the heat exchanger (10A) of the indoor unit (10) is cooled. Even if it does, cool air does not blow out into the room .

[0024]

As described above, according to the first aspect of the present invention, the outside air is taken into the indoor unit of the air conditioner from the ventilation device and is blown out into the room. Further, since the blower fan and the ventilation device are stopped, even if the heat exchanger of the indoor unit is cooled, the cool air does not blow out into the room, and there is an effect that the discomfort given to the user can be eliminated .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a building showing a control device of a first embodiment of the present invention and a conventional air conditioner.

FIG. 2 is a block diagram of an indoor unit controller according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart of the indoor unit controller according to FIG. 2;

FIG. 4 is a diagram showing a conventional indoor air conditioner control device.
FIG.

FIG. 5 shows another example of the control device of the conventional air conditioner .
Building longitudinal sectional view.

FIG. 6 shows another example of a control device of a conventional air conditioner .
Building longitudinal sectional view.

[Explanation of symbols]

7 Ventilation device 10 Indoor unit 10B Blower fan 11 Outdoor unit 17 Indoor unit controller 21 Fan stop means, ventilation stop means (microcomputer )

Continuation of the front page (56) References JP-A-4-136651 (JP, A) JP-A-1-256748 (JP, A) JP-A-4-13038 (JP, A) (58) Fields studied (Int) .Cl. ⁶ , DB name) F24F 11/02 101 F24F 11/02 102

Claims (1)

(57) [Claims] 1. A ventilation device for taking in outside air from outside the room,
An air conditioner having an indoor unit that is provided with a blower fan and performs a heating operation and a defrosting operation by operation of a refrigeration cycle, and has a function of taking in the outside air from the ventilator to the indoor unit and blowing the indoor air out by the blower fan. In the harmonic machine,
An air conditioner comprising: fan stopping means for stopping the blower fan during the defrosting operation during the heating operation; and ventilation stopping means for stopping the ventilation device during the defrosting operation during the heating operation. Machine control device .