KR101174036B1 - Capacity control apparatus of multi type air-conditioner - Google Patents

Abstract

The present invention relates to a capacity control method of a multi-air conditioner, by selectively driving the capacity of the variable compressor and the constant speed compressor provided in the multi-air conditioner consisting of a package air conditioner and a plurality of wall-mounted air conditioner according to the driving conditions of the air conditioner to efficiently distribute the performance The optimal cooling ability can be exhibited.

Description

CAPACITY CONTROL APPARATUS OF MULTI TYPE AIR-CONDITIONER}

The present invention relates to a capacity control method of a multi-air conditioner, and more particularly, to selectively drive the capacity of a variable compressor and a constant speed compressor provided in a multi-air conditioner consisting of a package air conditioner and a plurality of wall-mounted air conditioners according to the driving conditions of the air conditioner. A capacity control method of a multi-air conditioner.

In general, a separate air conditioner using a cooling cycle liquefies a refrigerant compressed in a compressor of an outdoor unit in a condenser and vaporizes it again in an evaporator of an indoor unit through an expansion valve. By cooling the room.

The multi-type air conditioner, which is a kind of the separate air conditioner, installs a plurality of compressors outdoors, and installs a plurality of spaces for cooling a plurality of indoor units, respectively, to cool the room.

The technology described above refers to the background of the technical field to which the present invention belongs, and does not mean the prior art.

As such, in the case of a multi-type air conditioner, there is a need to selectively drive a plurality of compressors for the most efficient performance distribution according to a plurality of indoor unit driving combinations.

The present invention was created in accordance with the necessity as described above, the capacity of the multi-air conditioner to selectively drive the capacity of the variable compressor and the constant speed compressor provided in the multi-air conditioner consisting of a package air conditioner and a plurality of wall-mounted air conditioner according to the driving conditions of the air conditioner The purpose is to provide a control method.

According to an aspect of the present invention, there is provided a capacity control method of a multi-air conditioner including a compressor in which a variable compressor and a constant speed compressor are connected in parallel, and an indoor unit in which one stand indoor unit and a plurality of wall-mounted indoor units are connected in parallel. In a control method; The maximum capacity of the variable compressor corresponds to the driving condition of one stand type indoor unit, the minimum capacity corresponds to the driving condition of one wall type indoor unit, and the capacity of the constant speed type compressor is set to correspond to the plurality of driving conditions of the wall type indoor unit. It is characterized by selectively controlling the operation of the variable compressor and the constant speed compressor with a capacity corresponding to the driving conditions.

Variable compressor in the present invention is characterized in that the two-stage variable compressor.

In the present invention, the capacity of the constant speed compressor is characterized by being smaller than the maximum capacity of the variable compressor and larger than the minimum capacity.

As described above, the present invention can optimally drive the capacity of the variable compressor and the constant speed compressor provided in a multi-air conditioner consisting of a package air conditioner and a plurality of wall-mounted air conditioners according to the driving conditions of the air conditioner, thereby exhibiting optimal cooling performance with efficient performance distribution. Can be.

1 is a block diagram showing a multi-air conditioner according to an embodiment of the present invention.
2 is a flowchart illustrating a capacity control method of a multi-acron according to an embodiment of the present invention.

Hereinafter, an embodiment of a capacity control method of a multi-air conditioner according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a block diagram showing a multi-air conditioner according to an embodiment of the present invention.

As shown in FIG. 1, the multi-air conditioner according to an exemplary embodiment of the present invention absorbs heat from a room, discharges cold air, and evaporates to a high temperature low pressure state, and a first to second wall-mounted indoor unit (a). 30b, 30c are connected to the indoor unit 30 and the variable compressor 20a and the constant speed compressor 20b for receiving a refrigerant from the indoor unit 30 and compressing them to a high temperature and high pressure state in parallel. 20), the condenser 10 for condensing the refrigerant conveyed from the compressor 20 to a low temperature and high pressure state, and the refrigerant condensed in the condenser 10 selectively stand-type indoor unit (30a) and the first to second wall-hung type Rapidly expanding refrigerant branched from the first to third selection valves 40a, 40b, and 40c and the first to third selection valves 40a, 40b, and 40c for transferring to the indoor units 30b and 30c, respectively. To third low temperature (50a, 50b, 50c) discharged to the indoor unit 30 by making the low temperature low pressure state It is provided, including.

Therefore, the refrigerant 10 compressed by the selected compressor 10 according to the driving conditions of the indoor unit 30 is branched by the first to third selection valves 40a, 40b, and 40c and transferred to the indoor unit 10.

The capacity control method of the multi-air conditioner made as described above will be described below with reference to a flowchart for describing a capacity control method of the multi-air conditioner according to an embodiment of the present invention shown in FIG. 2.

First, two stages of the maximum capacity of the variable compressor 20a correspond to the driving conditions of one stand type indoor unit 30a, and one stage of the minimum capacity corresponds to one driving condition of the wall-mounted indoor units 30b and 30c. The capacity of the constant speed compressor 20b is set to correspond to a plurality of driving conditions of the wall-mounted indoor units 30b and 30c.

In addition, the capacity of the constant speed compressor 20b is set to be smaller than the maximum capacity of the variable compressor 20a and larger than the minimum capacity.

For example, the capacity of the stand type indoor unit 30a is 6,000W, the wall-mounted indoor units 30b and 30c are 2,300W, respectively, and the maximum capacity of the variable compressor 20a is 6,007W and the minimum capacity is 3,077W. When the capacity of the compressor 20 according to the driving conditions of the indoor unit 30 can be set as shown in Table 1.

Indoor unit driving condition Cooling load Compressor driven Drive capacity Required cooling rate 1 wall-mounted indoor unit 2,300 W Variable compressor 1 stage drive 3,077 W 139% Two wall-mounted indoor units 4,600 W Constant speed compressor drive 4,660 W 101% 1 indoor indoor unit 6,000 W Variable compressor two stage drive 6,007 W 100% Stand indoor unit
1 wall-mounted indoor unit 8,300 W Variable compressor one stage drive
Constant speed compressor drive 7,737W 93% Stand indoor unit
Two wall-mounted indoor units 10,600 W Variable compressor two stage drive
Constant speed compressor drive 10,667 W 100%

Therefore, when the driving condition of the indoor unit 30 is determined (S5) and the driving condition of the first wall-mounted indoor unit 30b or the second wall-mounted indoor unit 30c is driven (S10), the required cooling load is variable to 2,300W. The compressor 20a is driven in one stage and supplied at 3,077W (S15).

In the case of driving conditions of the two first wall-mounted indoor units 30b and the second wall-mounted indoor units 30c (S20), the required cooling load is driven at 4,600W to supply the constant speed compressor 20b to 4,660W. (S25).

In addition, in the case of driving conditions of one stand indoor unit 30a (S30), the required cooling load is 6,000W and the variable compressor 20a is driven in two stages to supply 6,007W (S35).

In the case of driving conditions of one stand indoor unit 30a, one first wall-mounted indoor unit 30b, or one second wall-mounted indoor unit 30c (S40), the required cooling load is 8,300W at a constant speed compressor 20b. ) And the variable compressor 20a are driven in one stage and supplied as 7,737W (S45).

In addition, when the driving conditions of one stand indoor unit 30a, the first wall-mounted indoor unit 30b, and the second wall-mounted indoor unit 30c are two (S50), the required cooling load is 10.600W at a constant speed compressor 20b. ) And the variable compressor 20a are driven in two stages and supplied as 10,667W (S55).

Thus, by selectively controlling the operation of the variable compressor 20a and the constant speed compressor 20b according to the capacity of the required cooling load corresponding to the driving conditions of the indoor unit 30, it is possible to exhibit the optimal cooling ability with efficient performance distribution. .

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: condenser
20: compressor
20a: variable compressor
20b: Constant Speed Compressor
30: indoor unit
30a: Stand type indoor unit
30b: 1st wall-mounted indoor unit
30b: second wall-mounted indoor unit
40a, 40b, 40c: first to third selector valves
50a, 50b, 50c: first to third inflation portions

Claims (3)

In the capacity control method of a multi-air conditioner comprising a compressor in which a variable compressor and a constant speed compressor are connected in parallel, and an indoor unit in which one stand indoor unit and a plurality of wall-mounted indoor units are connected in parallel.
The maximum capacity of the variable compressor corresponds to the driving condition of one stand type indoor unit, the minimum capacity corresponds to the driving condition of one of the wall type indoor unit, and the capacity of the constant speed compressor corresponds to a plurality of driving conditions of the wall type indoor unit. And controlling the operation of the variable compressor and the constant speed compressor to a capacity corresponding to the driving conditions of the indoor unit.
The method of claim 1, wherein the variable compressor is a two-stage variable compressor.
The capacity control method of a multi-air conditioner according to claim 1, wherein the capacity of the constant speed compressor is smaller than a maximum capacity of the variable compressor and larger than a minimum capacity.

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