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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: 2020-08-07
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] Embodiment 1 of the refrigeration cycle apparatus installed in the air conditioner will be described below with reference to the drawings.

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

[0020] In the outdoor unit A1 , the outdoor heat exchanger 3 is pipe-connected to the discharge port of the compressor 1 through the four-way valve 2 , and the liquid-side filling valve 5 a is pipe-connected to the outdoor heat exchanger 3 through the electric expansion valve 4 . In addition, the suction port of the compressor 1 is pipe-connected to the gas side filling valve 5b through 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) whose opening degree is ...

Embodiment approach 2

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

[0046] When the number of operating outdoor units A1, A2 is reduced by the control unit 30a, the second control unit 30b of the main controller 30 operates as The high-speed operation of the outdoor fan of the subject outdoor unit is stopped, and the low-capacity operation of the compressor of the outdoor unit is made. 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 unit A2. The threshold Tos is used to determine whether the outside air temperature To1 is in the middle, high temperature region or in the low temperature region.

...

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Abstract

According to the present invention, when reducing the number of operating outdoor units, the outdoor fans of the outdoor units to be stopped are operated at high speed, and the compressors of the outdoor units are operated at low capacity. After continuing the high-speed operation and the low-capacity operation for a prescribed time, the outdoor fans and the compressors of the outdoor unit to be stopped are stopped.

Description

technical field [0001] Embodiments of the present invention relate to a refrigeration cycle device including a plurality of outdoor units and a plurality of indoor units. Background technique [0002] A multi-connected refrigeration cycle device is known, which includes a plurality of outdoor units and a plurality of indoor units connected to the outdoor unit through pipes, and the number of operating units of each outdoor unit is controlled according to the sum of the required capacities of each indoor unit. [0003] In this refrigerating cycle apparatus, when the number of operating outdoor units decreases, excess refrigerant may flow through the outdoor units that continue to operate. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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