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Air conditioner

An air-conditioning device and liquid refrigerant technology, applied in space heating and ventilation, heating methods, lighting and heating equipment, etc., can solve a lot of problems such as time and refrigerant amount errors

Active Publication Date: 2011-01-26
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of applying the above-mentioned refrigerant amount determination device, when liquid refrigerant is stored on the low-pressure side of the refrigerant circuit (in particular, the accumulator), the stored liquid refrigerant must be evaporated to the Heat source side heat exchanger moves, so often takes a lot of time
In addition, when judging whether the amount of refrigerant is appropriate or not with liquid refrigerant stored on the low-pressure side, an error may occur on the high-pressure side that is equal to the amount of refrigerant stored on the low-pressure side.

Method used

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no. 1 approach

[0117] (1) Structure of the air conditioner

[0118] figure 1 It is a schematic configuration diagram of the air conditioner 1 according to the first embodiment of the present invention. The air conditioner 1 is a device that performs a vapor compression type refrigeration cycle operation and is suitable for indoor cooling and heating of buildings and the like. The air conditioner 1 mainly includes: an outdoor unit 2 as a heat source unit, a plurality of (two in this embodiment) connected in parallel with the outdoor unit 2 as indoor units 4 and 5 as utilization units, connecting the outdoor unit 2 and The indoor units 4 and 5 have a liquid refrigerant connection pipe 6 and a gas refrigerant connection pipe 7 as refrigerant connection pipes. That is, the vapor compression refrigerant circuit 10 of the air conditioner 1 according to the present embodiment is configured by connecting the outdoor unit 2 , the indoor units 4 and 5 , the liquid refrigerant connection pipe 6 and t...

no. 2 approach

[0216] In the air conditioner 1 of the above-mentioned first embodiment and its modified example, the case where there is one outdoor unit has been described as an example, but it is not limited thereto. For example, it may be as follows: Figure 11 The shown air conditioner 101 of this embodiment is designed to have a structure in which a plurality of (two in this embodiment) outdoor units 2 are installed in parallel. Here, since the outdoor unit 2 and the indoor units 4 and 5 have the same structure as the outdoor unit 2 and the indoor units 4 and 5 of the first embodiment described above, description thereof will be omitted here.

[0217] In the air conditioner 101 of this embodiment, in the automatic refrigerant filling operation or the refrigerant leakage detection operation, the detection of the liquid level detection sensor 39 is carried out in each outdoor unit 2 respectively, and whether the outdoor heat exchange collection refrigeration is stored or not. The determin...

no. 3 approach

[0219] In the air conditioners 1 and 101 of the above-mentioned first and second embodiments and their modified examples, the case where the present invention is applied to the configuration in which the cooling operation and the heating operation can be switched is described as an example, but it is not limited thereto. For example, as Figure 12 The air conditioner 201 according to the present embodiment shown can be configured according to the indoor units 4 and 5 provided therein, such as performing a cooling operation in a certain air-conditioning space and simultaneously performing a heating operation in another air-conditioning space. The requirements of each air-conditioning space, and the structure that can perform cooling and heating operations at the same time, the present invention is applicable.

[0220] The air conditioner 201 of this embodiment mainly includes a plurality of (here, two) indoor units 4 and 5 as utilization units, an outdoor unit 202 as a heat sour...

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Abstract

An air conditioner which can appropriately determine the amount of refrigerant without requiring much time even if there is a liquid refrigerant accumulated in an accumulator when the determination is performed. An air conditioner (1) has a refrigerant circuit (10) having an accumulator, a shutoff mechanism (38), a refrigerant detecting mechanism (39), an operation controlling means, a refrigerant amount determining means, a means for determining liquid refrigerant accumulation, and a liquid refrigerant releasing means. In a cooling operation condition, the refrigerant detecting mechanism detects the quantity of state of the amount of refrigerant present upstream of the shutoff mechanism. The operation controlling means performs liquid refrigerant containing control. The refrigerant amount determining means determines whether or not the amount of refrigerant in the refrigerant circuit is appropriate based on the quantity of state of the amount of the refrigerant detected by the refrigerant detecting mechanism in the liquid refrigerant containing control. The means for determining liquid refrigerant accumulation determines whether or not liquid refrigerant is accumulated in the accumulator. When it is determined that liquid refrigerant is accumulated in the accumulator, the liquid refrigerant releasing means releases the liquid refrigerant from the accumulator.

Description

technical field [0001] The present invention relates to an air conditioner for judging whether or not the amount of refrigerant in a refrigerant circuit is appropriate, and an air conditioner for accurately judging whether or not the amount of refrigerant is appropriate during refrigerant amount judging operation, and the refrigerant amount judging operation. Background technique [0002] Generally, it is known that a heat source unit having a compressor and a heat source side heat exchanger, and a utilization unit having a utilization side expansion valve and a utilization side heat exchanger are connected via a liquid refrigerant connecting pipe and a gas refrigerant connecting pipe, whereby constituted air-conditioning unit. The appropriateness of the amount of refrigerant in the refrigerant circuit of the air conditioner is determined by operating the air conditioner under predetermined conditions and detecting the degree of subcooling on the refrigerant outlet side of t...

Claims

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Application Information

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IPC IPC(8): F25B1/00F24F11/02F25B43/00
CPCF25B13/00F25B2700/04F25B49/005
Inventor 山田拓郎小竹正人山口贵弘西村忠史
Owner DAIKIN IND LTD
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