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Refrigeration cycle device

A refrigeration cycle and controller technology, used in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of reduced refrigeration capacity and reduced heat exchange efficiency of outdoor heat exchangers

Active Publication Date: 2022-04-29
TOSHIBA CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the area of ​​liquid refrigerant in the outdoor heat exchanger of the outdoor unit on the continuation side increases, the area of ​​two-phase refrigerant in the outdoor heat exchanger decreases, and the heat exchange efficiency of the outdoor heat exchanger decreases.
As a result, cooling capacity decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] Next, Embodiment 1 of the refrigeration cycle apparatus mounted on the air conditioner will be described with reference to the drawings.

[0019] like figure 1 As shown, a plurality of, for example, two outdoor units A1, A2 are connected in parallel with each other by piping, and a plurality of indoor units B1, B2, . . . , Bn are connected to these outdoor units A1, A2 by piping.

[0020] In the outdoor unit A1 , the outdoor heat exchanger 3 is pipe-connected to the discharge port of the compressor 1 via the four-way valve 2 , and the liquid-side filling valve 5 a is pipe-connected to the outdoor heat exchanger 3 via the electric expansion valve 4 . In addition, the suction port of the compressor 1 is pipe-connected to the gas-side filling valve 5b via the four-way valve 2 and the accumulator 6 . An outdoor fan 7 is arranged near the outdoor heat exchanger 3 . The electric expansion valve 4 is a pulse motor valve (PMV), and its opening degree continuously changes acco...

Embodiment approach 2

[0045] Embodiment 2 of the refrigeration cycle apparatus will be described.

[0046] When the number of operations of the outdoor units A1 and A2 is reduced by the control unit 30a, the second control unit 30b of the main controller 30 makes the detection temperature (outside air temperature) To1 of the outside air temperature sensor 35 be equal to or greater than the threshold value Tos as a condition The high-speed operation of the outdoor fan of the outdoor unit of the object is stopped, and the compressor of the outdoor unit is operated at a low capacity. Then, the second control unit 30b stops the outdoor fan and the compressor of the outdoor unit to be stopped after the high-speed operation and the low-capacity operation continue for a predetermined time t.

[0047] The detected temperature To1 of the outside air temperature sensor 35 is substantially the same as the outside air temperature To2 detected by the outside air temperature sensor 45 on the side of the outdoor ...

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Abstract

In the present invention, when the number of operating outdoor units is reduced, the outdoor fan of the outdoor unit to be stopped operates at high speed, and the compressor of the outdoor unit operates at low capacity. After the high-speed operation and the low-capacity operation continue for a predetermined time, the outdoor fan and compressor of the outdoor unit to be stopped are stopped.

Description

technical field [0001] Embodiments of the present invention relate to a refrigeration cycle apparatus including a plurality of outdoor units and a plurality of indoor units. Background technique [0002] There is known a multi-stage refrigeration cycle apparatus including a plurality of outdoor units and a plurality of indoor units connected to the outdoor units by pipes, and the number of operating units of each outdoor unit is controlled according to the sum of the required capacities of the individual indoor units. [0003] In this refrigeration cycle apparatus, when the number of operating outdoor units decreases, an excess refrigerant may flow through the outdoor unit on the side that continues to operate. As a result, the area of ​​the liquid refrigerant in the outdoor heat exchanger of the outdoor unit on the side that continues to operate increases, the area of ​​the two-phase refrigerant in the outdoor heat exchanger decreases, and the heat exchange efficiency of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F24F11/70F24F11/86F25B13/00
CPCF25B13/00F24F11/86F25B49/02F25B2600/021F25B2600/0253F25B2600/11F25B2313/0294F25B2313/0233F25B2313/0253F25B2600/23F25B2500/05F25B2500/09F25B2500/23F25B2700/2106F24F11/77F24F11/46F25B2700/21151F25B2700/21152F25B2700/21163F25B2700/1931F25B2700/1933F25B2500/19F24F11/61Y02B30/70
Inventor 永井宏幸三浦贤今任尚希
Owner TOSHIBA CARRIER CORP
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