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Air Conditioner

a technology for air conditioners and air conditioners, applied in space heating and ventilation control systems, lighting and heating apparatuses, heating types, etc., can solve the problems of low load state that does not increase that much, and achieve the effect of increasing the capacity of heat exchangers, high flow velocity, and increasing the flow velocity of pipes

Inactive Publication Date: 2009-01-29
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]It is an object of the present invention to provide an air conditioner that increases the heat exchanging capacity by appropriately controlling the refrigerant drift between the paths of a flow divider that corresponds to the heat exchanger of an air conditioner.
[0015]With this structure, in a predetermined operation state, more refrigerant is positively distributed to paths having margins in processing capacities to increase the in-pipe flow velocity in such paths. Further, the difference between the temperature at the outlet of the indoor heat exchanger and the intake temperature increases. This increases the capacity of the indoor heat exchanger and increases the refrigerant capacity.
[0017]In this structure, when the load is low and the entire refrigerant flow amount decreases, the opening of the refrigerant flow amount regulation valve is decreased for the path at which the processing capacity is small and the refrigerant temperature at the outlet of the indoor heat exchanger is low. Further, by distributing more refrigerant to the predetermined path at which there is a margin in the processing capacity and the flow velocity is high, the in-pipe flow velocity of the path increases. Additionally, the difference between the temperature at the outlet of the indoor heat exchanger and the intake temperature increases. As a result, the capacity of the heat exchanger is effectively increased, and the refrigerant capacity is increased.
[0018]Preferably, the predetermined path is a path in which the flow velocity is high, and in a low load state, an opening of the refrigerant flow amount regulation valve is decreased for a path in which the flow velocity is low so that more refrigerant flows to the path that has a margin in heat exchange capacity and a high flow velocity. With this structure, the refrigerant flow amount regulation valve is closed for a path having a low flow velocity and no margin in the processing capacity so that more refrigerant is distributed to a path that has a margin in the processing capacity and has a high flow velocity. This increases the in-pipe flow velocity of the path. Additionally, the difference between the temperature at the outlet of the indoor heat exchanger and the intake temperature increases. As a result, the capacity of the heat exchanger is effectively increased, and the refrigerant capacity is increased.

Problems solved by technology

However, with such a structure, particularly when the proportions of the shadowed portions in FIGS. 6 and 8 are increased to increase the dryness, the capacity in a low load state does not increase that much.

Method used

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first embodiment

[0029]FIGS. 1 and 2 show the structures of a refrigerant circuit and its flow divider in an air conditioner according to a first embodiment of the present invention, and FIG. 3 shows the operation and effect of such a structure. To facilitate description, in the structure of this embodiment, the heat exchanger 26 is broadly divided into two flow velocity regions, low flow velocity portions A and B and high flow velocity portions C and D. Further, the flow divider 6 has two paths.

[0030]As shown in FIG. 1, the air conditioner includes outdoor equipment 1 and indoor equipment 10. The outdoor equipment 1 includes a compressor 2, a four-way valve 3, an outdoor heat exchanger 4, and a restriction device 5. The indoor equipment 10 includes a flow divider 6, an inlet 6a for the flow of refrigerant into the flow divider 6, a first branch flow path 7a in the flow divider 6, a second branch flow path 7b in the flow divider 6, an indoor heat exchanger 26, a first path 8A located at the outlet o...

second embodiment

[0035]FIG. 4 shows the structure of a flow divider and a heat exchanger for an air conditioner according to a second embodiment of the present invention. In the structure of the first embodiment, to facilitate description, for example, the indoor heat exchanger 26 of FIG. 6 is divided into two flow velocity regions, low flow velocity portions A and B and high flow velocity portions C and D, and refrigerant is distributed to the two paths, the first and second branch flow paths 7a and 7b. The features of the second embodiment are in the structure that will now be described. The flow velocity region of the heat exchanger 26 shown in FIG. 6 is finely divided into, for example, four flow velocity regions, low flow velocity portions A, B, and C and high flow velocity portion D. First, second, third, and fourth branch flow paths 7a to 7d are respectively arranged in correspondence with the velocity regions. In the same manner as the first embodiment, first to fourth refrigerant flow amoun...

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Abstract

An air conditioner that reverses and appropriately controls the stream of refrigerant between paths of a flow divider corresponding to an air conditioner heat exchanger having a plurality of paths to increase the heat exchange capacity is provided. The air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, a restriction device, and an indoor heat exchanger including a plurality of paths. These members are sequentially connected by a refrigerant pipe to form a refrigerant circuit. A flow divider including a plurality of paths is arranged between the indoor heat exchanger, which includes the plurality of paths, and the restriction device. A refrigerant flow amount regulation valve is provided for each of the plurality of paths in the flow divider. In a predetermined operation state, more refrigerant is distributed to a predetermined passage in which the processing capacity is large and the refrigerant temperature at an outlet of the indoor heat exchanger is high in comparison with other paths.

Description

TECHNICAL FIELD[0001]The present invention relates to an air conditioner, and more particularly, to an air conditioner including a flow divider for appropriately dividing the flow of refrigerant to a plurality of paths in an indoor heat exchanger of the air conditioner.BACKGROUND ART[0002]FIG. 5 shows the structure of a typical wall-mount air conditioner (indoor equipment) 21 employing a cross flow fan 29. As shown in FIG. 5, the air conditioner 21 includes a main body casing 20 having an upper surface in which a first air intake grille 23 is formed and a front surface upper portion in which a second air intake grille 24 is formed. The main body casing 20 also has an air discharge port 25 arranged in a lower corner of the front surface.[0003]An air passage 27 extends from the air intake grilles 23 and 24 to the air discharge port 25 in the main body casing 20. An indoor heat exchanger 26, which has a V-shaped cross-section so as to face toward the first and second air intake grilles...

Claims

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Application Information

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IPC IPC(8): F25B41/04F24F1/0063
CPCF24F1/0059F25B5/02F25B13/00F25B2600/2507F25B2341/0661F25B2341/0662F25B41/04F25B41/385F25B41/39F25B41/20F24F1/0063F24F2140/20
Inventor KOJIMA, MAKOTOSETOGUCHI, TAKAYUKI
Owner DAIKIN IND LTD