JPH06257788A - Duct type air conditioning system - Google Patents

Abstract

(57) [Summary] [Purpose] I would like to secure ventilation under the Building Standards Law, especially in highly airtight and highly insulated houses. [Configuration] Exhaust air is generated by constantly opening the variable chamber 10 on the side of the living room that is not air-conditioned during room-conditioning operation, and driving the range hood 13 and the fan of the sanitary system 14 at the same time as air conditioning. Is done by these fans. In addition, even if no air conditioning is performed in any room, the minimum ventilation operation is automatically performed for 24 hours.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention takes in outside air into an indoor unit through a ventilation duct, distributes air conditioned in this indoor unit to each living room side in a branch chamber, and branches this distributed air. The present invention relates to a duct type air conditioning system that guides each room through a duct and blows out from the air outlet into the room to ventilate and cool the room.

[0002]

2. Description of the Related Art In a conventional duct type air conditioning system, an operation circuit is installed in each room, and when the operation switch is turned on, the operation is controlled to be turned on and off according to the load in the room. Ventilation is a structure that is operated only when the ventilation mode is selected.

[0003]

Therefore, the conventional duct type air conditioning system has the following drawbacks.

A. Highly airtight and highly insulated houses require constant ventilation, but conventional systems do not allow constant ventilation.
It may not be possible to secure the required ventilation, and it has been pointed out that the concentration of carbon dioxide in the room increases due to insufficient ventilation, especially in airtight houses.

B. There is no ventilation at all in rooms that are not air-conditioned.

C. When ventilating, a dedicated air supply / exhaust fan is required, and the initial cost is high.

An object of the present invention is to propose a duct type air conditioning system in which the above-mentioned disadvantages a to c are eliminated.

[0008]

The structure of the duct type air conditioning system according to the present invention is as follows.

[0009] The outside air is taken into the indoor unit through the ventilation duct, the air conditioned by this indoor unit is distributed to each living room side in the branch chamber, and this distributed air is passed through the branch duct into each living room. In a duct-type air conditioning system that blows air into the room from the air outlet and installs variable dampers at the branch ports in the branch chamber and operates in conjunction with the air conditioning operation, one or both of a range hood fan and a sanitary fan. The duct-type air conditioning system is provided with a control circuit for driving the air conditioner and simultaneously opening the variable damper in the branch chamber to reach the non-air-conditioned room so as to simultaneously perform ventilation and base load air-conditioning on the non-air-conditioned room side.

A total heat (sensible heat) exchanger for transferring heat of exhaust gas exhausted by the range hood and the sanitary fan to the outside air may be mounted in the outside air intake system passage. In addition, when the operation of the air conditioning system is stopped, an automatic ventilation mode circuit that automatically changes to the ventilation mode may be incorporated to perform ventilation for 24 hours.

[0011]

When the air conditioning switch is turned on, the ventilation fan in the ventilation duct is driven, and at the same time, the blower fan in the indoor unit is driven to take in outside air into the indoor unit via the ventilation duct. A heat exchanger in which a heat medium circulates is incorporated in the indoor unit, and the taken-in air is heat-conditioned by the heat exchanger and enters the branch chamber. A variable damper is attached to a branch opening in the branch chamber. Among the variable dampers, the variable damper on the living room side in which the air conditioning switch is turned on has its opening adjusted according to the air conditioning load of the living room. At the same time, the variable dampers at the other branch ports are all opened minutely. As a result, the heat-conditioned air is constantly blown to the non-air-conditioned room as well as the room where the air conditioning switch is turned on, through the branch duct and the outlet. When the room temperature on the room side where air conditioning is performed reaches the set temperature, the variable damper on the room side also stops in a slightly opened state, and the ventilation fan in the ventilation duct and the blower fan in the indoor unit The drive is continued. At this time, the rotation speeds of the ventilation fan and the blower fan may be the same, but it is better to decelerate them.

Further, as described above, when the air conditioning switch is turned on, at the same time as the range hood fan of the kitchen or the fan of the sanitary system and other ventilation fans are attached, all the operation switches (or part of them) Are interlocked, and compulsory exhaust is performed from the kitchen or sanitary. Even if the air conditioning switch is turned off and air conditioning is not being performed in any room, the ventilation operation continues for 24 hours. However, in the case of absence for several days or more, it is possible to stop the ventilation operation, which is controlled manually or by a timer.

[0013]

1 shows an embodiment of a duct type air conditioning system according to the present invention.

Reference numeral 1 is a ventilation duct for taking in outside air into the room, 2 is a ventilation fan, 3 is a suction port, 4 is an indoor unit, and a blower fan 5 and a heat exchanger 6 for cooling are provided in the indoor unit 4. , A heating heat exchanger 7 is incorporated.
Reference numeral 8 is a branch chamber, and a variable damper 10 is attached to a branch port 9 in the branch chamber 8 as shown in FIG.

11 is a branch duct extending from the branch port 9 to the outlet 12 of each room, 13 is a range hood (range hood fan) attached to the kitchen, 14 is a sanitary exhaust system (exhaust fan), and 15 is a control circuit. Then, the following control is performed.

When an air-conditioning switch (not shown) is turned on, the ventilation fan 2 is driven, and at the same time, the blower fan 5 in the indoor unit 4 is driven to draw outside air into the indoor unit 4 through the ventilation duct 1. Put in. Heat exchangers 6 and 7 in which a heat medium circulates are incorporated in the indoor unit 4, and the taken-in air is heat-conditioned by one or both of the heat exchangers 6 and 7 to branch chamber 8 Get in A variable damper 10 is attached to a branch port 9 in the branch chamber 8. Among the variable dampers 10, the variable damper 10 on the living room side in which the air conditioning switch is turned on is opened according to the air conditioning load of the living room. As the degree is adjusted, the variable dampers 10 at the other branch ports 9 are all opened slightly (state shown by the solid line in FIG. 2). As a result, the heat-conditioned air is constantly blown in a small amount not only in the room where the air conditioning switch is turned on but also in the room where the air conditioning is not performed via the branch duct 11 and the outlet 12. When the room temperature on the side of the room where air conditioning is performed reaches the set temperature, the variable damper 10 on the side of the room also stops while remaining slightly open, and the ventilation fan 2
The blower fan 5 in the indoor unit 4 continues its drive. At this time, the rotation speeds of the ventilation fan 2 and the blower fan 5 may be the same, but it is better to decelerate them.

As described above, when the air conditioning switch is turned on, at the same time that the fan of the kitchen range hood 13 or the fan of the sanitary system 14 and other ventilation fans are attached, all the operation switches (or one of them) Part) interlockingly enters, and compulsory exhaust is performed from the kitchen or the sanitary. Even if the air conditioning switch is turned off and air conditioning is not being performed in any room, the ventilation operation continues for 24 hours. However, in the case of absence for several days or more, it is possible to stop the ventilation operation, which is controlled manually or by a timer.

FIG. 3 shows an example in which a total heat (sensible heat) exchanger is incorporated in the system, 17 is a sensible heat exchanger, 18 is a suction port,
Reference numeral 19 is an outlet.

[0019]

Since the present invention is constituted as described above,
It has the following effects.

A. Even if the room is not air-conditioned or the air-conditioning system is stopped, the ventilation is always performed.Therefore, even in the case of a highly airtight and highly heat-insulated house, ensure that the ventilation conditions specified by the Building Standards Act are secured and at the same time It can be air-conditioned for road use, and there is little temperature difference between rooms, making it comfortable.

B. Exhaust of the entire living room is performed by using a range hood or a sanitary fan in conjunction with each other, so that equipment for exhausting is not particularly necessary when implementing the present invention. As a result, the existing system can be put to practical use only by adding the control circuit. Therefore, the initial cost is low.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a duct type air conditioning system according to the present invention.

FIG. 2 is an explanatory diagram of a variable damper.

FIG. 3 is an explanatory diagram of an example of using a total heat (sensible heat) exchanger.

[Explanation of symbols]

 1 Ventilation Duct 2 Ventilation Fan 3 Suction Port 4 Indoor Unit 8 Branch Chamber 10 Variable Damper 11 Branch Duct 13 Range Hood 14 Sanitary System 15 Control Circuit

Claims (3)

[Claims] 1. An outside air is taken into an indoor unit via a ventilation duct, and air conditioned in this indoor unit is distributed to each living room side in a branch chamber, and this distributed air is distributed to each indoor side via a branch duct. In a duct type air conditioning system that guides the air into the living room and blows it into the room from the air outlet to air-condition the living room, a variable damper is attached to each branch port in the branch chamber and the range hood fan and sanitary fan are linked to the air conditioning operation. A duct type that is provided with a control circuit that drives one or both of them and simultaneously opens the variable damper in the branch chamber that reaches the non-air-conditioned room at the same time to perform ventilation and base-load air-conditioning on the non-air-conditioned room side at the same time. Air conditioning system. 2. The total heat (sensible heat) exchanger for collecting exhaust heat exhausted by a range hood and a sanitary fan and transferring the heat to the outside air is installed in the outside air intake system passage. The described duct type air conditioning system. 3. The duct type air conditioning system according to claim 1, further comprising an automatic ventilation mode circuit for automatically changing to a ventilation mode for all rooms when the operation of the air conditioning system is stopped.