JPH06103109B2 - Duct connection structure of air conditioner - Google Patents

Description

The present invention relates to a duct connection structure for an air conditioner, and more particularly to a duct connection structure for an air conditioner having at least two systems of conditioned air flow. is there.

[Prior Art] An air conditioner 1 schematically shown in FIG. 3 has been proposed. The air conditioner 1 includes an outdoor unit 2 and an indoor unit 3
And at least two systems of a first branch chamber 4 and a second branch chamber 5 connected to the indoor unit 3.

The outdoor unit 2 and the indoor unit 3 constitute a cooling and heating system. The outdoor unit 2 compresses and supplies a refrigerant, an outdoor unit heat exchanger 7, and an outdoor unit fan 8 for the outdoor unit heat exchanger 7. Have and.

The indoor unit 3 includes a first heat exchanger 9 and the first heat exchanger 9
Fan 10, first valve 11, second heat exchanger 12, and second fan 13 for this second heat exchanger 12
And a second valve 14.

The compressor 6, the outdoor unit heat exchanger 7, the first heat exchanger 9, the first valve 11, the second heat exchanger 12, and the second valve 14 are connected by a refrigerant pipe 15.

The first branch chamber 4 is connected to the first heat exchanger 9 via the first main outlet duct 16. Second heat exchanger
The second branch chamber 5 is connected to 12 via the second main outlet duct 17.

A blowout grill 19 to each room is connected to each of the first branch chamber 4 and the second branch chamber 5 via a branch duct 18. Each branch duct 18 is provided with an opening degree adjusting damper 20.

Further, the control panel 21 controls the compressor 6, the outdoor unit heat exchanger 7, the outdoor unit fan 8, the first heat exchanger 9, and the first fan.
10, the first valve 11, the second heat exchanger 12, the second fan 13, the second valve 14, and the opening degree adjusting damper 20 are controlled.

Note that, as shown in FIG. 2, the blowing air volumes of the first fan 10 and the second fan 13 are “strong”, “medium”, and
It can be controlled in four levels, "weak" and "fine".

In the air conditioner 1 having such a configuration, when performing the cooling operation, the outdoor unit heat exchanger 7 functions as a condenser that liquefies by radiating the refrigerant (cooling by the outside air), and the first heat exchanger 9 Second heat exchanger
12 functions as an evaporator that is vaporized by the refrigerant absorbing heat (heated by the inside air).

On the contrary, when performing the heating operation, the outdoor unit heat exchanger 7 functions as an evaporator that is vaporized by the refrigerant absorbing heat (heated by a heat supply unit (not shown)),
The first heat exchanger 9 and the second heat exchanger 12 function as a condenser that liquefies by radiating the refrigerant (cooling by the inside air).

The conditioned air thus conditioned passes through the first main outlet duct 16, the first branch chamber 4 and the branch duct 18 or through the second main outlet duct 17, the second branch chamber 5 and the branch duct 18. It will be blown out to each room through the blow-out grill 19.

However, in controlling the operation of the air conditioner 1, either the first valve 11 or the second valve 14 is closed and either the first heat exchanger 9 or the second heat exchanger 12 is stopped. When the other air volume is "light" (light wind), if the capacity of the outdoor unit 2 is large, the refrigerant cannot be completely vaporized, and the outdoor unit 2 has an abnormally high pressure.

Further, both the first fan 10 and the second fan 13 have four air volume adjustment stages, but a larger number of adjustment stages for air volume switching is desired.

As a duct type air conditioner, there is one disclosed in JP-A-63-251745.

[Problems to be Solved by the Invention] The present invention has been made in view of the above problems. It is possible to eliminate troubles such as abnormally high pressure of an outdoor unit and to ensure stable operation, and a fine air volume An object of the present invention is to provide a duct connection structure of an air conditioner that can be controlled.

[Means for Solving the Problems] That is, the present invention provides a first heat exchanger and a first fan, a first branch chamber that receives supply of conditioned air from the first heat exchanger, A plurality of outlet grills connected to the first branch chamber by a branch duct;
A heat exchanger and a second fan, a second branch chamber that receives supply of conditioned air from the second heat exchanger, and a plurality of outlet grills connected to the second branch chamber by a branch duct. An air conditioner having an outdoor unit for sending refrigerant to the first and second heat exchangers, wherein the first branch chamber and the second branch chamber are connected by a connection duct. It is a duct connection structure of an air conditioner.

The duct connection structure of the air conditioner may be characterized in that both the first heat exchanger and the second heat exchanger can be operated by operating the outdoor unit.

[Operation] In the duct connection structure for the air conditioner according to the present invention, since the first branch chamber and the second branch chamber are connected by the connection duct, the air volume can be switched by the first fan and the second fan. The number of adjustment stages can be increased, and comfortable air volume selection is possible by controlling the air volume in more stages.

Furthermore, if both the first heat exchanger and the second heat exchanger are operated, the passage capacity of the refrigerant in the refrigerant pipe operated by the compressor of the outdoor unit or the heat exchanger of the outdoor unit will be one-sided. It will be increased more than in the case, and abnormal high pressure of the outdoor unit can be prevented.

[Embodiment] Next, an air conditioner having a duct connection structure according to the present invention will be described with reference to FIGS. 1 and 2. However, the same parts as those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a schematic view of the air conditioner 30 described above. The structure different from that of the air conditioner 1 shown in FIG. 3 is that the first branch chamber 4 and the second branch chamber 5 are connected by a connecting duct 31. , The first valve 11 and the second valve
That is, both 14 are opened so that both the first heat exchanger 9 and the second heat exchanger 12 can be operated.

Therefore, if each of the first fan 10 and the second fan 13 is capable of adjusting the air volume in four stages as shown in FIG. 2, the first fan 10 and the second fan 13 as shown in FIG. It is possible to adjust the air volume in ten ways by combining the respective air volume stages of the fan 13. That is, the maximum is the level of “strong” for both the first fan 10 and the second fan 13,
Both minimums are "fine" levels.

Moreover, since the air volume is proportional to the noise associated therewith, it is possible to advantageously control the noise measure by making the air volume control finer.

Further, as one mode of air conditioning control, for example, the opening degree adjusting damper 20 of the first branch chamber 4 is closed when it is not necessary to perform air conditioning from the blowout grill 19 communicating with one of the first branch chambers 4. However, even in such a state, it is not necessary to stop the first heat exchanger 9 unlike the conventional air conditioner 1 shown in FIG.

That is, since the first heat exchanger 9 and the second heat exchanger 12 are both operated even with the minimum air volume (“fine”), the passage capacity of the refrigerant flowing through the outdoor unit 2 as a whole. It is possible to prevent an abnormally high pressure in the outdoor unit 2 without causing a shortage.

Moreover, the first branch chamber 4 which receives the supply of the conditioned air from the first heat exchanger 9 is connected to the second branch chamber 4 via the connecting duct 31.
Conditioned air from the first heat exchanger 9 thus operated is supplied to the second branch chamber 5 via the first branch chamber 4 and the connecting duct 31, It can be blown out from each blow-off grill 19 of the second branch chamber 5 system according to the air volume control stage of FIG.

It is not necessary to change the specifications of the outdoor unit 2 and the indoor unit 3 to enable the above-mentioned air conditioning control, the conventional product can be used as it is, and only a part of the duct needs to be changed. It can be constructed at low cost.

In addition, in the present invention, not only the basic configurations of the outdoor unit and the indoor unit are arbitrary, but the number of branch chambers may be arbitrary plural.

[Effects of the Invention] As described above, according to the present invention, the first branch chamber and the second branch chamber are connected by the connecting duct, and the conditioned air from each branch chamber can be mutually supplied. Therefore, troubles such as abnormal high pressure of the outdoor unit can be prevented, and fine air volume control can be performed.

[Brief description of drawings]

FIG. 1 is a schematic view of an air conditioner 30 having a duct connection structure according to an embodiment of the present invention, FIG. 2 is a table showing stages of air volume control, and FIG. A schematic diagram and FIG. 4 are tables showing the stages of air volume control. 1 ... Air conditioner 2 ... Outdoor unit 3 ... Indoor unit 4 ... First branch chamber 5 ... Second branch chamber 6 ... Compressor 7 ... Outdoor unit heat exchanger 8 ... Outdoor unit fan 9 ... First heat exchanger 10 ... First fan 11 ... First valve 12 ... Second heat exchanger 13 ... Second fan 14 ... Second valve 15 ... Refrigerant Piping 16 …… First main blowout duct 17 …… Second main blowout duct 18 …… Branch duct 19 …… Blowout grill 20 …… Aperture adjustment damper 21 …… Control panel 30 …… Air conditioner 31… … Connection duct

Claims (1)

[Claims] 1. A first heat exchanger and a first fan, and a first heat exchanger supplied with conditioned air from the first heat exchanger.
A branch chamber, a plurality of outlet grills connected to the first branch chamber by a branch duct, a second heat exchanger and a second fan, and conditioned air supply from the second heat exchanger. Second to receive
An air conditioner having a plurality of branch chambers, a plurality of outlet grills connected to the second branch chamber by a branch duct, and an outdoor unit that sends a refrigerant to the first and second heat exchangers. 2. The duct connection structure for an air conditioner, wherein the branch chamber and the second branch chamber are connected by a connection duct.