JP2937307B2 - Indoor unit for heating and cooling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention incorporates a heat exchanger in which hot or cold water circulates into a unit, and blows out the heat exchanged heat by the heat exchanger into a room through a duct to heat or cool the room. The present invention relates to an indoor unit for heating and cooling.

[0002]

2. Description of the Related Art FIG. 4 shows a known example in which an indoor unit is installed at one place in a dwelling unit, and each room is heated and cooled by blowing air from the indoor unit through a duct.
And FIG. FIG. 4 shows a system in which the indoor unit 1 and each room are connected by a supply duct 2 and a return duct 3, and FIG. 5 shows a system in which each room is connected only by the supply duct 2 and return a is performed via a corridor or the like. It is. 4 and 5, reference numeral 4 denotes an outdoor unit, and reference numeral 5 denotes a heat medium pipe.

[0003]

However, the above-mentioned known examples have the following disadvantages. a. In the case of the system shown in FIG. 4, heating and cooling can be efficiently performed in each room, and control can be performed in each room independently. However, supply and return of ducts are provided in each room. In addition, construction becomes difficult, the restrictions on the building due to beam penetration and the like increase, and the cost increases. b. In the case of the method shown in FIG. 5, since there is no return duct, it is relatively easy in terms of construction and restrictions of the building, but since the control of each room has the same return, the start-up becomes slow, There are difficulties in doing it effectively.

[0004] An object of the present invention is to propose a heating and cooling indoor unit that solves the problems described in a and b above.

[0005]

The configuration of the heating / cooling indoor unit according to the present invention is as follows.

[0006] A heat exchanger for circulating a heat medium and a fan for blowing air are incorporated in the unit body, and room air is sucked from a suction port with a damper via the heat exchanger and the fan, and the temperature-adjusted air is damped. A main air-conditioning system configured by a ventilation path that blows out of the room from an air outlet provided with the air passage, a branch intake duct with a damper connected to an upstream air path of a heat exchanger of the main air-conditioning system, and the heat exchange. And a branch air outlet duct with a damper connected to a ventilation passage downstream of the fan and the fan.

A control damper is installed on the branch suction duct side, and when the load in the room connected to the branch duct is more than a certain level, the damper at the suction port of the main heating and cooling system is opened to control the control damper. A control circuit may be added to switch the branch suction duct side to the blow-out duct side and simultaneously blow out hot air or cold air from the branch suction duct side to improve the rise.

Further, the branch duct for suction and discharge may be constituted by a double pipe, one of which may be used on the intake side and the other may be used on the outlet side.

[0009]

In the indoor unit, for example, rooms facing each other across a corridor are assembled as a pair and attached to one of the rooms. This mounting criterion is based on the principle that there are no beams or concrete walls that require a duct to penetrate between two pairs of rooms. Then, the branch duct is extended to expose the suction port and the air outlet at the tip to a part of the other room. If the branch duct is attached to the indoor unit in advance so as to be extendable or bendable, the branch duct is extended. Otherwise, the branch duct is installed later. The operation switch is ON only for the room where the indoor unit is installed.
In this case, the operation is performed only for the main heating and cooling system. On the other hand, when the operation switch is turned ON only in the room to which the branch duct is connected, the intake and outlet of the main heating and cooling system are not performed because the damper is closed, and the damper only in the branch duct side is not operated. Opened,
Heating and cooling is performed only for the room to which the branch duct is connected. At this time, if the load on the branch duct side is greater than or equal to a certain value, the control circuit opens the damper of the suction port on the main heating and cooling system side, controls the control damper, and blows out the air from both ducts to the room. Improves startup when the load is large. However, when the load falls below a certain level, the damper of the suction port on the main heating / cooling system side is closed, and the control damper is returned to its original state. When both rooms are operating at the same time, the dampers of both the main heating / cooling system and the branch duct are both open.

[0010]

FIG. 1 is an explanatory view of an example in which an indoor unit according to the present invention is mounted. An indoor unit 10 is installed on the A side in rooms A and A 'opposite to each other across a corridor, and a room B is installed.
And B 'are installed on the B side, and the other rooms A', B '
Are connected to each other by a branch duct 11. 12 is an outdoor unit and 13 is a pipe.

FIG. 2 shows an example of the detailed structure of the indoor unit 10. As shown in FIG. 14 is a unit body, 15 is a suction port with a damper 20 provided in the body 14, 16 is an outlet with a damper 21, 17
Is a ventilation path connecting the suction port 15 and the air outlet 16, and a heat exchanger 18 and a fan 19 are incorporated in the ventilation path 17, and this system path is referred to as a main heating / cooling system.

Reference numeral 22 denotes a branch suction duct constituting the branch duct 11 with a damper 24 extended from the main body 14, and 23 denotes a damper.
A branch outlet duct constituting the branch duct 11 with 25, 26 switches the air sucked from the branch suction duct 22 to the main heating / cooling system suction port 15 side (a in the figure) in the main body 14,
This is a control damper for stopping the suction port 15 and switching to the outlet 16 (b in the figure) of the main heating / cooling system.

In the above embodiment, when heating and cooling only in the rooms A and B, the dampers 24 and 25 are closed,
Open the dampers 20, 21 and operate only with the main heating and cooling system.
Next, when heating and cooling only in the rooms A 'and B', the dampers 24 and 25 are opened, the dampers 20 and 21 are closed, and the air in the rooms A 'and B' is sucked in by the branch suction duct 22.
The heat is exchanged in the heat exchanger 18, and the heat is blown out from the branch outlet duct 23 into the rooms A ′ and B ′ by the fan 19. Next, when the load on the rooms A 'and B' is equal to or greater than a certain value, the damper 20 is opened, the control damper 26 is switched to b in FIG.
When the load is reduced, the control damper 26 is returned to the position a. Next, when both the rooms A and A 'and the rooms B and B' are operated, the control damper 26 is fixed at the position a, and the dampers 20, 21, 2
Open all 4 and 25. The above control is all performed by the control circuit 27.

Although the branch ducts 11 of the embodiment are independent of each other, a double pipe may be used.

[0015]

As described above, according to the present invention, instead of installing one indoor unit for each dwelling unit, a plurality of indoor units are installed for each paired room in the dwelling unit to perform heating and cooling. Has the effect of a. The labor and cost for duct construction can be reduced. b. Since the duct can be constructed without penetrating the beam or the concrete wall, there is no fear that the penetration becomes an obstacle and the construction cannot be performed or the strength of the beam or the wall is reduced as in the related art. c. The rise of the room on the branch duct side can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example in which an indoor unit according to the present invention is installed in a dwelling unit.

FIG. 2 is an explanatory diagram of an indoor unit according to the present invention.

FIG. 3 is an explanatory diagram of an example of the indoor unit according to the present invention as viewed from the side.

FIG. 4 is an explanatory diagram of a conventional indoor unit and an example of this construction.

FIG. 5 is an explanatory view of a conventional indoor unit and an example of this construction.

[Explanation of symbols]

 10 Indoor unit 11 Branch duct 12 Outdoor unit 13 Piping 14 Unit body 15 Inlet 16 Outlet 17 Ventilation path 18 Heat exchanger 19 Fan 20, 21 Damper 22 Branch intake duct 23 Branch outlet duct 24, 25 Damper 26 Control damper 27 Control circuit

Claims (3)

(57) [Claims] 1. A temperature-controlled air, wherein a heat exchanger for circulating a heat medium and a fan for blowing air are incorporated in a unit body, and room air is sucked from a suction port with a damper via the heat exchanger and the fan. A main heating and cooling system configured to have a ventilation path that blows air from a blower outlet with a damper, and a branch intake duct with a damper connected to an upstream ventilation path of a heat exchanger of the main heating and cooling system. An indoor unit for heating and cooling, comprising: a branch outlet duct with a damper connected to a heat exchanger and a ventilation passage downstream of a fan. 2. A control damper is installed on the branch suction duct side, and when the load in the room connected to the branch duct is higher than a certain level, the damper of the suction port of the main heating / cooling system is opened to control the control damper. The indoor unit for heating and cooling according to claim 1, further comprising a control circuit for switching the branch suction duct side to the blow-out duct side and simultaneously blowing out hot air or cold air from the branch suction duct side to improve the rise. 3. The heating and cooling room according to claim 1, wherein the branch ducts for suction and discharge are constituted by double pipes, one of which is used on the intake side and the other is used on the outlet side. unit.