Air-conditioning device

An air-conditioning device and refrigerant technology, applied in air-conditioning systems, space heating and ventilation, heating methods, etc., can solve problems such as refrigerant noise, prevent air-conditioning performance from deteriorating, reduce refrigerant filling, and eliminate controllability Variation and the effect of refrigerant noise

Active Publication Date: 2020-02-11
FUJITSU GENERAL LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition, there is a problem that if the temperature difference between the refrigerant inside the condenser and the air decreases due to a decrease in the condensation temperature, the refrigerant flowing out of the condenser may not be completely condensed and become a gas-liquid two-phase state, and the gas The refrigerant in the liquid two-phase state passes through the expansion valve to generate refrigerant noise

Method used

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  • Air-conditioning device
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Embodiment

[0015] Such as figure 1 As shown in (A), the air conditioner 1 of this embodiment has: one outdoor unit 2; Specifically, one end of the liquid pipe 8 is connected to the shutoff valve 25 of the outdoor unit 2, and the other end is branched and connected to the respective liquid pipe connection portions 53a to 53c of the indoor units 5a to 5c. In addition, one end of the gas pipe 9 is connected to the shutoff valve 26 of the outdoor unit 2, and the other end is branched and connected to each of the gas pipe connection parts 54a-54c of the indoor units 5a-5c. Thus, the refrigerant circuit 100 of the air conditioner 1 is formed.

[0016] In addition, in the air conditioner 1 of the present embodiment, as an example of device information required for specifying the amount of refrigerant charged in the refrigerant circuit 100 by the following method, the power of the outdoor unit 2 is 14 kW, and the power of the indoor unit 5a is 14 kW. The power of ~5c is 4.5kW, the inner diamet...

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Abstract

An air-conditioning device (1) wherein the amount of refrigerant filling a refrigerant circuit (100) is set within a range defined by a lower limit filling amount and an upper limit filling amount. The lower limit filling amount is an amount with which the refrigerant supercooling degree at the refrigerant outlet side of a supercooling heat exchanger (23) is 0 degrees and the refrigerant dryness degree is 0, when a cooling operation is carried out under an overload condition in which the refrigerant does not easily condense in an outdoor heat exchanger (22) functioning as a condenser. The upper limit filling amount is an amount with which the refrigerant supercooling degree at the refrigerant outlet side of the outdoor heat exchanger (22) is 0 degrees and the refrigerant dryness degree is0, when a cooling operation is carried out under a rated condition in which the refrigerant more easily condenses in the outdoor heat exchanger (22) than in the overload condition.

Description

technical field [0001] The present invention relates to an air conditioner using refrigerant. Background technique [0002] Conventionally, an air conditioner has a refrigerant circuit in which at least one outdoor unit and at least one indoor unit are connected through refrigerant piping. By driving a compressor installed in the outdoor unit, the refrigerant filled in the refrigerant circuit is cooled Circulate in the solvent circuit for cooling operation or heating operation. In addition, there is an air conditioner that has a bypass pipe that passes the air flowing from the outdoor heat exchanger that operates as a condenser in cooling operation and a subcooling heat exchanger in the refrigerant circuit as described above. A part of the refrigerant is branched so that it returns to the suction side of the compressor, and the subcooling heat exchanger cools the refrigerant flowing from the outdoor heat exchanger through the refrigerant flowing in this bypass pipe (see, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F25B1/00
CPCF25B2500/19F25B13/00F25B2500/12F25B45/00F25B2400/12F25B2313/006F25B2313/0233F25B2400/13F25B49/005F25B2600/19F24F1/00077F24F1/00075F24F1/0059
Inventor 真田慎太郎板仓俊二广崎佑
Owner FUJITSU GENERAL LTD
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