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Air conditioning device

A technology of air-conditioning device and decompression device, which is applied in the direction of space heating and ventilation, heating method, lighting and heating equipment, etc., and can solve the problems of reduced quietness of repeaters

Pending Publication Date: 2022-02-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the opening degree of the decompression device is adjusted in this way, noise is generated when the refrigerant passes through the decompression device, so the quietness of the relay unit may be reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] The air conditioner 100 according to Embodiment 1 will be described. figure 1 It is a schematic diagram showing an example of the air conditioner 100 according to the first embodiment. figure 2 yes means figure 1 A simplified refrigerant circuit diagram of a part of the air conditioner 100 of FIG. In addition, in the following drawings, the dimensional relationship and shape of each component may differ from actual ones. In addition, in the following drawings, the same reference numerals are assigned to the same members or parts or members or parts having the same functions, or the reference numerals are omitted.

[0023] like figure 1 As shown, the air conditioner 100 includes an outdoor unit 10 , a plurality of indoor units 20 , and a relay unit 30 . The outdoor unit 10 and the relay unit 30 are connected by refrigerant piping. Also, some of the plurality of indoor units 20 are connected to the outdoor unit 10 via the relay unit 30 , and the other part of the pl...

Embodiment approach 2

[0063] In Embodiment 2, using Figure 4 The control processing of the flow path switching valve 50 and the first decompression device 6 during the oil recovery operation will be described. Figure 4 It is a flowchart showing control processing of the flow path switching valve 50 and the first decompression device 6 during the oil recovery operation in the second embodiment. The configuration of the air conditioner 100 is the same as that of Embodiment 1, and thus description thereof will be omitted.

[0064] Here, the “oil recovery operation” refers to an operation mode of the air conditioner 100 in which the compressor 1 recovers the lubricating oil discharged together with the refrigerant into the compressor 1 . When the cooling operation is performed for a long time with a low load, the lubricating oil discharged from the compressor 1 together with the refrigerant remains in the refrigerant piping connecting the outdoor unit 10 and the relay unit 30 , especially on the hea...

Embodiment approach 3

[0071] use Figure 5 The configuration of the air conditioner 100 according to Embodiment 3 will be described. Figure 5 It is a simplified refrigerant circuit diagram showing an example of the refrigerant circuit of the air-conditioning apparatus 100 according to the third embodiment. In the air conditioner 100 according to Embodiment 3, the indoor unit 20 is provided with a refrigerant leakage detection device 74 . The control device 70 receives refrigerant leakage detection information from the refrigerant leakage detection device 74 . As the refrigerant leakage detection device 74, for example, a refrigerant leakage detection sensor is provided. As the refrigerant leak detection sensor, for example, a gas sensor such as a semiconductor gas sensor, a hot wire semiconductor gas sensor, or an infrared gas sensor is used. In addition, the refrigerant leakage detection sensor may be an oxygen concentration type gas sensor that detects a drop in oxygen concentration, or may b...

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PUM

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Abstract

This air conditioning device comprises a relay that has a first decompression device. The relay has a flow path switching valve that is provided to first refrigerant piping connected between a compressor and a load-side heat exchanger, and bypass piping that is connected to the flow path switching valve at one end, and at the other end is connected to second refrigerant piping connected between the first decompression device and a heat source-side heat exchanger. The flow path switching valve has, as internal flow paths, a first flow path communicating the first refrigerant piping and the bypass piping, and a second flow path communicating the compressor and the load-side heat exchanger via the first refrigerant piping, and switches the internal flow paths such that one internal flow path among the first flow path and the second flow path is open while the other internal flow path is closed.

Description

technical field [0001] The present invention relates to an air conditioner including a repeater. Background technique [0002] Patent Document 1 discloses an air conditioner including a relay unit that relays between an outdoor unit and an indoor unit. In the air conditioner of Patent Document 1, the decompression device is accommodated in the relay unit. In addition, in the air conditioner disclosed in Patent Document 1, a plurality of indoor units are connected to a relay unit, and the plurality of indoor units can be individually switched between activation and deactivation. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2015-135196 [0004] In an air conditioner, in order to maintain the operating capability of the outdoor unit, the circulation amount of the refrigerant may be temporarily increased. In such a case, in the air conditioner of Patent Document 1, in order to maintain the amount of refrigerant circulating through the activated indoor unit, the r...

Claims

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Application Information

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IPC IPC(8): F25B1/00F24F11/36F24F11/42F24F11/86F25B5/00F25B47/02F25B49/02
CPCF25B49/02F25B13/00F25B41/20F25B47/025F25B2313/0233F25B2313/0232F25B2500/16F25B2500/22F25B2600/0253F25B2600/2507F25B2600/2513F25B1/00F24F11/36F24F11/42F24F11/86F25B5/00F25B47/02
Inventor 森下侑哉
Owner MITSUBISHI ELECTRIC CORP
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