Title: Air Conditioner Arrangement Field of the present Invention The present invention relates to an air conditioner arrangement, and more particularly to an air conditioner arrangement for multiple rooms, comprising an outdoor air conditioner having a single compressor communicating with at least two indoor air conditioners.

Background of the Present Invention The conventional air conditioner arrangement has two major different models according to the different functions of the air conditioner. First kind of air conditioner arrangement is the one to one model, which comprises one outdoor air conditioner connected to one indoor air conditioner. Second kind of air conditioner arrangement is the one to multiple model, which comprises merely one outdoor air condition communicating with at least two indoor air conditioners. The outdoor air conditioner of the one to multiple model further has two different types. First, in a single outdoor air conditioner comprises multiple compressors serving for multiple indoor air conditioners respectively. Second, in a single outdoor air conditioner comprises a single compressor serving for at least two indoor air conditioners.

The above described air conditioner arrangement, which comprises a single outdoor air conditioner having merely a single compressor serving for at least two indoor air conditioners, has a great shortcoming. Conventionally, when one of the multiple indoor air conditioners is shut off or the room temperature is lowered to a predetermined temperature, the extra refrigerant such as freon is recycled back to the compressor.

However, since the single compressor needs to satisfy the multiple indoor air conditioners simultaneously, the cooling ability for each indoor air conditioner is at different magnitude. Also the cooling ability output by the compressor to each indoor air conditioner is fixed, so the compressor must continue to work until the temperature of every room that the indoor air conditioners installed respectively is lowered to the predetermined temperature. Therefore, by shutting off one of the indoor air conditioners would not save any energy or increase the cooling ability of other indoor air conditioners in other rooms.

Summary of the Present Invention The main objective of the present invention is to provide an air conditioner arrangement, which comprises an outdoor air conditioner having a single compressor communicating with at least two indoor heat exchangers, in which when one (or more) of the indoor heat exchangers is (are) shut off or stopped because the room temperature has been lowered to a predetermined temperature, the cooling ability of the other operating indoor heat exchanges are increased, so that the temperature of the rooms that the other indoor heat exchanges are installed will be accelerated to reach the predetermined temperature.

Accordingly, the present invention provides an air conditioner arrangement comprising an outdoor air conditioner and at least two indoor heat exchanges. The outdoor air conditioner comprises at least a compressor for compressing and transporting refrigerant to the indoor heat exchanges to have heat transfer. Between the compressor and each respective indoor heat exchanges, at least a main injection tube and an expansion chamber connected to the main injection tube are provided. A common cycling tube communicating with every expansion chambers. The main injection tube is throughout the common cycling tube and inserted into the expansion chamber with a predetermined distance.

Brief Description of Drawings Fig. 1 is a schematic view of an air conditioner arrangement according to a first preferred embodiment of the present invention, in which an outdoor air conditioner is connected with two corresponding indoor heat exchangers.

Fig. 2 is partial sectional view illustrating a common cycling tube connected between two expansion chambers of the air conditioner arrangement according to the above first preferred embodiment of the present invention.

Fig 3. is a schematic view of an air conditioner arrangement according to a second preferred embodiment of the present invention, in which an outdoor air conditioner is connected with three corresponding indoor heat exchangers.

Fig. 4 is partial sectional view illustrating common cycling tube connected between three expansion chambers of the air condition arrangement according to the

above second preferred embodiment of the present invention.

Detailed Description of the Preferred Embodiment Referring to Figs. 1 and 2 of the drawings, a first preferred embodiment of the present invention of an air conditioner arrangement is illustrated. The air conditioner arrangement comprises an outdoor air conditioner 10, a first indoor heat exchanger 21 and a second indoor heat exchanger 22. The outdoor air conditioner 10 comprises a accumulator 11 for collecting a cycling refrigerant, such as freon, from the first and second indoor heat exchangers 21,22 by a collecting conduit 111 connecting to the first and second indoor heat exchangers 21,22, a compressor 12 which is connected to the accumulator 11 by a connecting conduit 121 for compressing the refrigerant, a condenser 13 which is connected to the compressor 12 by a condensing conduit 131, a desiccator 14 which is connected to the condenser 13 by a desiccating conduit 141, a first and a second main injection tube 15,16 which are connected from the desiccator 14 to a first and a second expansion chamber 17,18 respectively, and a first and a second control valve V1, V2 which are connected to the first and second expansion chamber 17, 18 respectively. The first and second indoor heat exchanger 21,22 are connected to the first and second control valve V1, V2 by a first and a second conduit 211,221 respectively.

The first and second expansion chamber 17,18 are further connected by a common cycling tube 30 which positioned at the first and second expansion chamber inlet 171, 181. The first and second main injection tube 15,16 have a first and a second main injection outlet 151,161 throughout said common cycling tube 30 and inserted into the first and second expansion chamber 17,18 respectively.

Referring to Fig. 2, during the stage that the first and second main injection outlet tubes 151,161 inside of the first and second expansion chambers 17,18 are outletting refrigerant, the surroundings of the first and second main injection outlets 151,161 are in a vacuum stage of low pressure. When the first indoor heat exchanger 21 is shut off, or when the predetermined room temperature is reached, the first control valve V I would be shut off to stop providing the refrigerant. The second expansion chamber inlet 181 would suck the excess refrigerant out of the first expansion chamber 17 from the first expansion chamber inlet 171 and through the common cycling tube 30. In other words,

when the first control valve V1 is shut off, the original refrigerant providing for the first indoor heat exchanger 21 would be sucked to fill the second expansion chamber 18 and provide the second indoor heat exchanger 22 via the second control valve V2 so as to increase the cooling ability of the second indoor heat exchanger 22, therefore, the second indoor heat exchanger 22 would be able to provide a cooler room temperature in shorter time and thus effectively saves the energy source.

Referring to Figs. 3 and 4 of the drawings, an air conditioner arrangement according to a second preferred embodiment of the present invention is illustrated. The air conditioner arrangement of the second preferred embodiment embodies how to communicate one compressor of an outdoor air conditioner 10'with more than two (three) indoor heat exchangers 21,22,23. The outdoor air conditioner arrangement 10'is similar to the outdoor air conditioner arrangement 10 of above disclosed first embodiment, that also comprises a accumulator 11, a compressor 12 connected to the accumulator 11, a condenser 13 connected to the compressor 12, a desiccator 14 connected to the condenser 13, a first and a second main injection tube 15,16 extended from the desiccator 14 to a first and a second expansion chamber 17,18 respectively, and a first and a second control valve V 1, V2 connected between the first and second expansion chamber 17,18 and the first and second indoor heat exchangers 21,22 respectively. According to the second preferred embodiment, an additional third main injection tube 19 is also extended from the desiccator 14 to a third expansion chamber 20 which is further connected to the third indoor heat exchanger 23 through a third control valve V3. The first, the second and the third expansion chamber 17,18,20 are further connected with a common cycling tube 30'which positioned at the first, second, and third expansion chamber inlet 171,181, 201.

As shown in Fig. 4, the first, second, and third main injection tubes 15,16, 19 comprise a first, a second and a third main injection outlet 15', 16', 19', each respectively throughout said common cycling tube 30'and inserting into the first, the second and the third expansion chamber 17,18, 20.

When one or two indoor heat exchangers, for example the first and second indoor heat exchangers, 21,22 are shut off or their predetermined room temperatures have been reached, the control valves V1, V2 are shut off and the refrigerant which is originally supplied to the first and second expansion chambers 17,18 will be sucked to third

expansion chamber 20 via the first and second expansion chamber inlet 171,181 and common cycling tube 30'due to the vacuum surrounding around the first and second main injection outlets 15', 16'. Therefore, the cooling ability of the third indoor heat exchanger 23 is enhanced, that would be able to provide a cooler room temperature in shorter time and thus effectively saves the energy source.

By means of the principle, a single outdoor air conditioner having merely a single compressor can also be communicated with four or more indoor heat exchangers in the air conditioner arrangement system.