JPH0415442A - Air conditioner having ventilation function - Google Patents

Abstract

PURPOSE:To adjust an amount of ventilation corresponding to the number of operating air conditioners and to prevent dusts from being discharged out of a blowing port by a method wherein a system is provided with the first means for controlling an opening or closing means for a passage of each of air conditioners being operated and the second means for controlling a driving of a fan. CONSTITUTION:This system includes a plurality of passages 16a and 16b guided from a ventilation device 2 to heat exchangers 20a, 20b disposed in a plurality of air conditioners, opening and closing means Da, Db selectively opening or closing the plurality of passages 16a, 16b and the first means for controlling the opening and closing means Da, Db for opening a passage corresponding to the air conditioner of the plurality of air conditioners being operated. This system also includes a control means including the second means for controlling an operation of the air supplying fan 15 in order to supply a proper amount of air from the air supplying fan 15 disposed in the ventilation fan 2 cooperating with an operation of the first means.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a ventilator for forcibly supplying outside air and an air conditioner provided with an inlet for returning indoor air. Regarding an air conditioner equipped with.

<Conventional technology> Conventionally, in order to reduce energy consumption in the air conditioner and provide comfortable air conditioning, heat is transferred between the outside air that is supplied from the outside into the room and the air that is exhausted from the room to the outside. An air conditioner using a heat exchange ventilator that performs heat exchange is used, and its basic configuration is shown in FIG.

This air conditioner not only ventilates a room 1 using a heat exchange ventilator 2, but also controls the temperature and humidity inside the room 1 by using a plurality of air conditioners having indoor units 3a, 3b and a common outdoor unit 4. It was designed to do this. The air in the room 1 is guided into the heat exchange ventilator 2 through the duct 8 from the exhaust lower a formed on the facing plate 7 provided on the ceiling 6a.
From the exhaust fan 10 to the duct 1 via the internal heat exchanger 9
1 and is discharged outdoors from the vent cap 12.

On the other hand, unpressurized air is led from the vent cap 13 through the duct 14 into the heat exchange ventilator 2, through the heat exchanger 9, from the supply air fan 15 through the ventilation duct 16, and into the second hand 16a,
The heat exchangers 20a and 2 of the indoor units 3a and 3b are separated into 16b.
They are each guided to the primary side space of 0b.

The indoor units 3a, 3b of the air conditioner are equipped with heat exchangers 20a, 20b in which a heat medium is circulated between the indoor units 3a, 3b and the outdoor unit 4.

The air returned to the space on the primary side of the heat exchangers 20a, 20b from the suction ports 21a, 21b formed in the mounting plates 26a, 26b provided on the ceilings 6a, 6b is transferred to the heat exchanger 2.
After being heated or cooled by 0a, 20b, the circulation fan 22a.

Air outlet 23 formed from 22b to mounting plates 26a and 26b
It is blown out into the chamber l via a and 23b.

24a and 24b are filters for dust collection; 25a and 24b are filters for collecting dust;
, 25b is a drain pan.

Remote control units 30a and 30b for controlling the operations of the air conditioner and the heat exchange ventilator 2 are installed at appropriate locations in the room 1, and are connected to switch boxes 31a and 31b of the indoor units 3a and 3b. switch box 3
1a, 31b and the switch box 32 of the heat exchange ventilator 2
are connected to each other via a signal line 33, which allows the operation of the heat exchange ventilator 2 to be changed in response to setting operations by the remote control units 30a and 30b and the operating status of the air conditioner. can.

<Problems to be Solved by the Invention> In the above-mentioned prior art, the air that has passed from the air supply fan 15 to the ventilation duct 16 via the heat exchanger 9 is divided into two and guided to the indoor units 3a and 3b. Considering that the machines 3a and 3b are operated simultaneously, the capacity of the exhaust fan 10 and the air supply fan 15 is twice the capacity for one indoor unit.

Therefore, when only one indoor unit is operated, there is a problem that the ventilation air volume is too large to be balanced, and the air conditioning temperature cannot be maintained at the set temperature. Note that when only one indoor unit is operated, for example, when the circulation fans 22a and 22b are stopped for defrost, off-dry, or hot start while the indoor unit is operating, or when air conditioning is not performed in spring or Only one vehicle may be operated during intermediate periods such as autumn.

In addition, heat exchange ventilator 2 is installed on indoor units that are not operating.
As a result, air is blown into the chamber 1 through the suction port 21a or 21b due to the air resistance in the heat exchanger 20a or 20b and filter 24a.
, 24b, etc., may fall into the chamber 1.

Therefore, an object of the present invention is to solve the above-mentioned technical problems and provide an air conditioner that can adjust the ventilation air volume according to the number of units in operation, and that does not cause the risk of dust etc. being discharged from the air outlet of the air conditioner. shall be.

Means for Solving the Problems> The air conditioner of the present invention for achieving the above objects has the following features:
A ventilator with an air supply fan for forcibly supplying outdoor air, and the air supplied from this ventilator and the air returned to the room through an inlet facing the room. and a plurality of air conditioners each having a circulation fan that supplies the air into the room through the heat exchanger, the air conditioner comprising: , a plurality of passages respectively guided to heat exchangers provided in the plurality of air conditioners, an opening/closing means for selectively opening and closing the plurality of passages, and one of the plurality of air conditioners. a first means for controlling an opening/closing means to open a passage corresponding to an air conditioner in operation;
and a second means for driving and controlling the air supply fan in order to supply an appropriate amount of air from the air supply fan provided in the ventilator in conjunction with the operation of the means. be.

Effect> According to the above configuration, the outside air forcibly supplied by the air supply fan of the ventilator is guided to the heat exchanger of the air conditioner. Air from the room is also returned to the heat exchanger through an inlet provided inside the room. Therefore, by the circulation fan provided on the secondary side of the heat exchanger, outside air and air returned from the room are drawn together through the heat exchanger and supplied to the room where air conditioning is to be performed.

In the present invention, since a plurality of air conditioners are installed and the opening/closing means is driven by the control means, passages to air conditioners that are not in operation can be kept closed. Also,
In conjunction with this, the air volume is also controlled by the air supply fan, making it possible to maintain a ventilation volume commensurate with the number of air conditioners being operated.

<Example> Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments.

FIG. 3 is a simplified sectional view showing the basic configuration of an air conditioner according to an embodiment of the present invention. In FIG. 3, parts corresponding to those shown in FIG. 6 described above are given the same reference numerals. In this air conditioner, air from the air supply fan 15 of the heat exchange ventilator 2 is transferred to the ventilation duct 1.
6] Heat exchanger 20a of indoor units 3a, 3b via 6c.

This heat exchanger 2Qa,
Air is supplied to the chamber 1 from the blow-off ports 23a and 23b via the air outlet 20b. Ventilation duct] 6 branch part 16C and indoor unit 3a,
3b], 6 a16b is provided with motor dampers Da and Db, which can open and close the flow of air flowing into the indoor units 3a and 3b.

The detailed structure of the heat exchange ventilator 2 is shown in FIGS. 4 and 5. The outside air from the duct 14 flows from the air supply passage 81 through the heat exchanger 9 to the air supply fan 15 via a path 82, and from the air supply fan 15 to the indoor units 3a, 3b via the ventilation ducts 1 to 16. Supplied.

The air from the damper motor D
Depending on the position of the damper 85, which is rotated in the direction of the arrow 84 by the connecting rod 83, the path 86.8
7). That is, when the damper 85 is in the position shown by the solid line in FIG. 4, air from the duct 8 flows via the heat exchanger 9 along a path 86 from the exhaust passage 88 to the exhaust fan 0.

On the other hand, when the damper 85 is in the position shown by the two-dot chain line in FIG.
0 from the exhaust passage 88 to the exhaust fan ] 0 .

In the heat exchange ventilator 2 provided with the damper 85 in this way, the heat exchanger is a heat exchanger that performs ventilation while exchanging heat between the outside air and the exhausted indoor air, and a heat exchanger that performs ventilation while exchanging heat between the outside air and the exhausted indoor air. It is possible to switch between normal ventilation in which the air bypasses the heat exchanger 9 and is ventilated without heat exchange.

With the above configuration, by performing heat exchange ventilation with the heat exchange ventilator 2, air is supplied into the room after reducing the temperature difference between the air from outside and the indoor air temperature.
Comfortable ventilation can be performed without creating a draft feeling, and heat loss in the air conditioner can be reduced to save energy. Further, in intermediate seasons such as spring and autumn, for example, more comfortable ventilation can be achieved by setting the heat exchange ventilator 2 to normal ventilation operation and supplying outside air directly to the room 1.

FIG. 1 is a block diagram showing the electrical configuration of the above air conditioner. The heat exchange ventilator 2 and the indoor units 3a, 3b transmit signals via their respective transmission circuits 5152a, 52b. Indoor units 3a, 3b and remote control unit =
The transmission and reception of signals between the I□ 30a and 30b is achieved via transmission circuits 55a, 55b, 56a, and 56b.

The remote control unit l□ 30a, 30b includes a switch 60a for starting/stopping the air conditioner, setting the operating mode such as cooling operation, heating operation, dry operation, and blowing operation, setting the temperature, and setting the air volume. , 60b, the signals from the switches 60a and 60b are input to a control circuit 61a+61b composed of encoders, and the control circuit 61
The configuration is such that control signals corresponding to the switches operated by the switches a and 61b are created and transmitted from the transmission circuits 56a and 56b.

On the other hand, the indoor units 3a and 3b include a remote control unit 30a.
, 30b, and a control circuit 62a into which signals from the heat exchange ventilator 2 are input, and which also provides various control signals to these.
, 62b are provided.

The control circuits 52a, 62b also include a circulation fan 22a.
, 22b, a drive circuit 63a that drives motors Ma and Mb of
, 63b are connected.

Further, the heat exchange ventilator 2 is provided with a control circuit 65 to which signals from the indoor units 3a and 3b are input, and which provides various signals to the indoor units 3a and 3b.

This control circuit 65 includes a temperature detector Thl (a fourth temperature detector Th2) configured with a thermistor, which detects the temperature of the outside air passing through the duct 14, and a temperature detector Th2 (fourth (see figure) are connected. Furthermore, exhaust fan 10. Each motor M3 of the air supply fan 15. A drive circuit 66 is connected to drive the damper motor DM for driving M4 and the damper 85, respectively. PGI and PG2 are motor M3. This is the M4 rotation speed detector.

Furthermore, the control circuit 65 is connected with open/close switches Ta, Tb for turning on/off motors DMa, DMb that drive motor dampers Da, Db, and open/close switches Ta,
Depending on the switching position of Tb, the motor dampers Da and Db are in an open state or a closed state.

In this embodiment, the control circuits 62a and 6 of the indoor units 3a and 3b are
2b, a control circuit 65 for the heat exchange ventilator 2, and the like.

FIG. 2 is a flowchart for explaining the operation of the above configuration. In the initial state of steps nl and n2,
Motor dampers Da and Db are closed, and motor M3. of the heat exchange ventilator 2 is closed. M4 should also be stopped.

Operation of the air conditioner is started, and in step n3,
The control circuit 62a of the indoor unit 3a determines whether or not the motor Ma of the circulation fan 22a is turned on. If it is turned on, the control circuit 62a of the indoor unit 3a opens the motor damper Da with the on/off switch Ta in step n4, and the indoor unit is turned off from the heat exchange ventilator 2. 3a
allow air circulation to. Then, in step n5, the control circuit 62b of the indoor unit 3b controls the circulation fan 22.
It is determined whether or not motor Mb of motor b is turned on, and if it is turned on, motor damper Db is opened in step n6 to allow air to flow from heat exchange ventilator 2 to indoor unit 3b. At the same time, the motor M3 of the heat exchange ventilator 2. M
4 at full capacity Q (step n7).

If it is determined in step n3 that the motor Ma of the circulation fan 22a is off, the process proceeds to step n9, where the motor damper Da is closed to disable air flow from the heat exchange ventilator 2 to the indoor unit 3a. And step n
At IO, it is determined whether or not the motor Mb of the circulation fan 22b is turned on. If it is turned on, the motor damper Db is opened in step n12, but if it is turned off, the motor damper Db is closed (step n1l), and the step Proceed to n2.

If the motor Mb of the circulation fan 22b is turned off in step n5, the process proceeds to step n8 and closes the motor damper Db.

After step n8 and step ni2, one of the motor dampers Da or Db is in an open state, so in step n13 such a step rotates the motors M3 and M4 of the heat exchange ventilator 2 at half the capacity Q/2. n3~n1
By the operation 3, motor dampers Da and Db are opened and closed according to the operating state of the air conditioner, and motor dampers Da and Db are opened and closed.
The air blowing capacity of the heat exchange ventilator 2 can be adjusted depending on the opening/closing state of the heat exchange ventilator 2.

Note that the present invention is not limited to the above-described embodiments. For example, in the above embodiment, an example was explained in which there were two indoor units, but when multiple indoor units are generally installed, the air blowing capacity of the heat exchange ventilator 2 is switched in multiple stages to perform similar control. I can do what I want to do.

In addition, although we have explained the case where the heat exchange ventilator 2 that can select between heat exchange ventilation and normal ventilation by controlling the damper 85 is applied, a heat exchange ventilator that can only perform heat exchange ventilation or a heat exchange ventilation The present invention can be easily applied to cases where a ventilator capable of only normal ventilation is used. Furthermore, the heat exchange ventilator 2 applied in the above embodiment has an air supply fan 15 for forcibly supplying and exhausting air.
Although an air supply fan 10 is provided, the present invention can be widely implemented in at least an air conditioner using a ventilator that forcibly supplies air. Various design changes can be made without changing the gist of the invention.

<Effects of the Invention> As described above, according to the air conditioner having a ventilation function of the present invention, when the air conditioner is in operation, the circulation fan is turned off and the air blowing is interrupted, for example, for defrosting operation. Selectively open and close passages to multiple air conditioners, even if only the ventilation equipment is operated without operating the air conditioners during intermediate seasons such as spring and autumn. By doing so, it is possible to block the flow of air from the ventilator to the air conditioner that is not operating. For this reason,
This can prevent dust near the air conditioner's intake port from being swept into the room.

Further, by steplessly controlling the air volume of the ventilator in conjunction with the opening and closing of the opening/closing means described in section 2, the amount of air supplied to the air conditioner can always be maintained at an appropriate value.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the electrical configuration of an air conditioner according to an embodiment of the present invention, Fig. 2 is a flowchart for explaining its operation, and Fig. 3 is the basic configuration of the above air conditioner. FIG. 4 is a simplified plan view showing the internal structure of the heat exchange ventilator 2; FIG. 5 is a simplified cross-sectional view showing the internal structure of the heat exchange ventilator 2. 1 is a simplified cross-sectional view showing the basic configuration of a conventional air conditioner. 2...Heat exchange ventilator, 3a, 3b...Indoor unit, 4...
-Outdoor unit, 15...Air supply fan, 16...Ventilation duct, 20a, 20b--Heat exchanger, 21a, 21b=-Suction port, 22a, 22b...Circulation fan, 23a, 23b--・Air outlet, 65...Control circuit (control means), Da, Db...Motor damper

Claims (1)

[Claims] 1. Air supply fan for forcibly supplying outdoor air (
15), and the air supplied from this ventilator (2) and the indoor air returned through the suction ports (21a, 21b) provided facing the room. A heat exchanger (20a, 2
0b), and circulation fans (22a, 22b) that supply air into the room via the heat exchangers (20a, 20b).
an air conditioner having a plurality of air conditioners, the air conditioner comprising: a plurality of air conditioners having a heat exchanger (20a, 20b) installed in the plurality of air conditioners; a plurality of passages (16a, 16b), and a plurality of passages (16a, 16b)
opening/closing means (Da, Db) for selectively opening/closing
), and an opening/closing means (
Da, Db); 1. An air conditioner having a ventilation function, comprising: a control means (65) including a second means for driving and controlling an air fan (15).