JPH0868553A - Ventilating air conditioner - Google Patents

Abstract

PURPOSE: To suppress the running cost at the time of ventilating to a lower value as compared with prior art by providing a bypass route for bypassing the outdoor air heat exchanged with a heat recovery type ventilating unit via an air conditioning unit to guide it to a residence area. CONSTITUTION: A ventilating air conditioner comprises a heat recovery type ventilating unit l and an air conditioning unit 3. The outdoor air OA heat exchanged with exhaust air EA by the unit 1 is introduced into the unit 3, and the air conditioned air SA is supplied to a residence area. A bypass route for guiding the air OA heat exchanged by the unit 2 via a bypass duct 16 for bypassing the unit 3 to the residence area is formed. Thus, since the heat exchanged air OA is guided to the residence area by bypassing the unit 3, ventilation can be conducted without operating the blower 25 of the unit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation air conditioner including a heat recovery type ventilation unit.

[0002]

2. Description of the Related Art Generally, there is known a ventilation air conditioner that combines a sensible heat recovery type ventilation unit and a heating / cooling air conditioning unit to cool and heat the room while ventilating the room. FIG. 3 shows an example of a conventional ventilation air conditioner.

Referring to FIG. 3, reference numeral 51 is a sensible heat recovery type ventilation unit, and 53 is a cooling / heating air conditioning unit. The ventilation unit 51 exchanges heat between the air RAB sucked through the first blower 61 and the outside air OA sucked through the second blower 63 from each room in the non-residential area (for example, a toilet) while exchanging heat with the heat exchanger 64. The exchanged air is supplied to the inlet of the cooling and heating air conditioning unit 53.

The cooling and heating air conditioning unit 53 sucks the outside air OA and the air RAA sucked through the third blower 65 from the suction port of each living area, and the heat exchanger 57.
After heat exchange is performed in the unit 53 having the built-in unit, the air SA that has been conditioned is supplied to each living area. According to this
The air RAB from the non-residential area is exhausted to the outside of the building as exhaust air EA through the ventilation unit 51, while the ventilation unit 51 introduces approximately the same amount of outside air OA as the exhaust air into the building, while Can be air-conditioned.

[0005]

In the ventilation air conditioner having the above structure, for example, only the ventilation can be performed while the cooling or heating operation is stopped in the intermediate period.

However, according to the conventional ventilation air conditioner, not only the first and second blowers 61, 63 but also the third blower 65 must be operated when performing the ventilation only. There is a problem of not becoming.

For example, when the operation of the third blower 65 is stopped and the ventilation operation is performed only by the operation of the first and second blowers 61 and 63, the air blown out through the second blower 63 is in a path with a small pressure loss. This is because it flows out, and eventually flows out to the suction port (the original RAA side) of each living area. In this way, when ventilation air flows through the inlet of each residential area,
Since the intake port is installed in the corridor or hall of each living area, the ventilation air will flow to the non-residential area as it is,
Fresh outside air cannot be sent to the living area where ventilation air must be sent.

Therefore, as described at the beginning,
Even when operating only ventilation, all blowers 61, 6
I am trying to drive 3,65.

However, in this case, although the air volume of ventilation air should be about 20%, the air RAA from the suction port is required.
Will be sucked in, and ventilation air will also be sucked in, so 4
There is a problem that an air flow rate of about 0% is required, and thus the running cost of ventilation operation by this ventilation air conditioner increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilation air conditioner which solves the problems of the above-mentioned conventional technique and can keep the running cost during ventilation operation lower than that of the conventional one.

[0011]

In order to achieve the above object, the first invention comprises a heat recovery type ventilation unit and an air conditioning unit, and uses the heat recovery type ventilation unit to exchange the outside air with the exhaust air. In a ventilation air conditioner that is introduced into an air conditioning unit to be air-conditioned and supplied to a living area, a bypass route was provided for guiding the external air that has undergone heat exchange in a heat recovery type ventilation unit to the living area by bypassing the air conditioning unit. It is a thing.

A second aspect of the present invention is provided with a heat recovery type ventilation unit and an air conditioning unit, and introduces the outside air, which has exchanged heat with the exhaust air in the heat recovery type ventilation unit, into the air conditioning unit to air-condition it in each living area. In the ventilation air conditioner to supply, an introduction duct that introduces indoor air from the living area to the air conditioning unit,
A supply duct that guides air conditioned by the air conditioning unit to a living area is connected by a bypass duct, and dampers are provided in the introduction duct and the bypass duct in the upstream region of the bypass duct.

According to a third aspect of the present invention, a heat recovery type ventilation unit and an air conditioning unit are provided, and the outside air that has exchanged heat with the exhaust air in the heat recovery type ventilation unit is introduced into the air conditioning unit to be air-conditioned to each residential area. In a ventilation air conditioner for supply, a damper that can be closed during ventilation operation is provided in an introduction duct for introducing indoor air from a living area to an air conditioning unit.

[0014]

According to the first aspect of the present invention, when the ventilation operation is performed, the external air that has exchanged heat with the heat recovery type ventilation unit bypasses the air conditioning unit and is guided to the living area, so that the blower of the air conditioning unit is operated. Ventilation operation can be performed without this, and the running cost is reduced accordingly.

According to the second aspect of the invention, during the ventilation operation, the ventilation operation can be performed without operating the blower of the air conditioning unit by closing the damper of the introduction duct and opening the damper of the bypass duct. Running cost is reduced.

According to the third aspect of the invention, by closing the damper of the introduction duct during ventilation operation, ventilation air does not flow into the intake port of the living area, so that the efficiency of ventilation operation can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a ventilation air conditioner according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a sensible heat recovery type ventilation unit, and 3 is a cooling and heating air conditioning unit. The sensible heat recovery type ventilation unit 1 heats the air RAB sucked from each room in a non-residential area (for example, a toilet) through the duct 11 and the first blower 21 and the outside air OA sucked through the duct 12 and the second blower 23. While exchanging heat in the exchanger 4, the air after the heat exchange is transferred to the duct 1
It is supplied to the inlet of the cooling and heating air conditioning unit 3 through

The cooling and heating air conditioning unit 3 uses this outside air OA.
And the air RAA sucked through the introduction duct 14 (a damper 17 described later is opened) and the third blower 25 from the suction port of each living area, and the heat exchanger 7 in the cooling and heating air conditioning unit 3 After heat exchange, the conditioned air SA is supplied to each living area through the supply duct 15. According to this, the air RAB from the non-residential area is exhausted to the outside of the building through the ventilation unit 1 as the exhaust air EA, while the sensible heat recovery type ventilation unit 1 exhausts the outside air OA in an amount almost equal to the exhaust amount. It is possible to air-condition each living area by introducing

Therefore, according to this embodiment, referring to FIG. 1, the introduction duct 14 and the supply duct 15 are connected by the bypass duct 16, and the introduction duct 14 and the bypass duct in the upstream region of the bypass duct 16 are connected. The open / close type dampers 17 and 18 are respectively provided in the unit 16.

FIG. 1 shows a ventilation and air conditioning operation, in which the damper 17 is opened and the damper 18 is closed.

According to this embodiment, in addition to the above ventilation and air conditioning operations, the ventilation operation can be performed with the cooling or heating operation stopped.

During this ventilation operation, as shown in FIG.
First, the damper 17 is closed and the damper 18 is opened. And
The first and second blowers 21, 23 are operated, and the third blower 25
Will stop. When the third blower 25 is stopped, the outside air OA that has exchanged heat with the sensible heat recovery type ventilation unit 1 normally flows through a path with a small pressure loss. For example, the suction port of each living area (the original RAA side) or the like.

However, according to this, since the damper 17 of the duct 14 is closed, air does not flow to the suction port of each living area.

Since the suction port (on the side of the original RAA) of each living area is usually provided in a corridor or a hall, if outside air OA flows through the suction opening, it will flow to the non-residential area (for example, a toilet) as it is. From there, it becomes air RAB and flows into the sensible heat recovery type ventilation unit 1. This prevents fresh outside air from being sent to the living area, which originally had to send ventilation air.

However, according to this embodiment, since the damper 18 of the bypass duct 16 is open, the outside air OA
Flows to each residential area through it.

In this case, the outside air OA is flowed through the bypass duct 16 that bypasses the air conditioning unit 3, so that the outside air OA that has exchanged heat in the heat recovery type ventilation unit 1 is bypassed to the air conditioning unit 3. A bypass route is constructed to lead to the residential area.

According to this, fresh air can be sent to the living area through the bypass duct 16 without operating the third blower 25. Therefore, the amount of ventilation air can be reduced to the extent that the third blower 25 is not operated, the amount of air can be suppressed to about 20%, and the running cost of ventilation operation by this ventilation air conditioner can be suppressed low.

As another embodiment, during ventilation operation,
As long as the outside air OA is not allowed to flow into the suction port (the original RAA side) of each living area, the damper 17 may be provided in the conventional configuration (FIG. 3).

In this case, only when the ventilation operation is performed,
The damper 17 is controlled so as to be closed. However, in this case, since the third blower 25 is operated during the ventilation operation, the running cost cannot be reduced so much.

In short, according to each of the above embodiments, the outside air OA is prevented from flowing into the intake port (the original RAA side) of the living area during the ventilation operation, so that the efficiency of the ventilation operation is higher than that of the conventional case. Be promoted.

[0032]

As is apparent from the above description, according to the first aspect of the present invention, the bypass path for guiding the outside air, which has been heat-exchanged by the heat recovery type ventilation unit, to the living area by bypassing the air conditioning unit. Since it is provided, the ventilation operation can be performed without operating the blower of the air conditioning unit, and the running cost can be reduced.

The second aspect of the present invention is more specific, and includes an introduction duct for introducing indoor air from the living area to the air conditioning unit,
By connecting a supply duct that guides the air conditioned by the air conditioning unit to the living area with a bypass duct, and installing a damper in the introduction duct in the upstream area of this bypass duct and in the bypass duct, the damper of the introduction duct should be used during ventilation operation. By closing and opening the damper of the bypass duct, the ventilation operation can be performed without operating the blower of the air conditioning unit, and the running cost can be reduced.

According to the third aspect of the invention, since the introduction duct for introducing the indoor air from the living area to the air conditioning unit is provided with the damper capable of being closed during the ventilation operation,
By closing this damper, ventilation air can be prevented from flowing into the suction port in the living area, and the efficiency of ventilation operation can be improved.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a ventilation air conditioner according to the present invention.

FIG. 2 is a system diagram showing a position of a damper during ventilation operation.

FIG. 3 is a system diagram showing a conventional ventilation air conditioner.

[Explanation of symbols]

 1 Ventilation unit 3 Air conditioning unit 14 Introduction duct 15 Supply duct 17, 18 Damper

Claims (3)

[Claims] 1. Ventilation comprising a heat recovery type ventilation unit and an air conditioning unit, wherein external air that has exchanged heat with exhaust air in the heat recovery type ventilation unit is introduced into the air conditioning unit and air-conditioned to be supplied to a living area. A ventilation air conditioner, characterized in that, in the air conditioner, a bypass path is provided for guiding outside air that has undergone heat exchange by a heat recovery type ventilation unit and bypassing the air conditioning unit to the living area. 2. A heat recovery type ventilation unit and an air conditioning unit are provided, and external air that has exchanged heat with exhaust air in the heat recovery type ventilation unit is introduced into the air conditioning unit to be air-conditioned and supplied to each living area. In the ventilation air conditioner, an introduction duct for introducing indoor air from the living area to the air conditioning unit,
A ventilation air conditioner characterized in that a supply duct for guiding air conditioned by the air conditioning unit to a living area is connected by a bypass duct, and a damper is provided in the introduction duct and the bypass duct in an upstream region of the bypass duct. . 3. A heat recovery type ventilation unit and an air conditioning unit are provided, and external air that has exchanged heat with exhaust air in the heat recovery type ventilation unit is introduced into the air conditioning unit to be air-conditioned and supplied to each living area. In the ventilation air conditioner, a damper that can be closed during ventilation operation is provided in an introduction duct for introducing indoor air from the living area to the air conditioning unit.