US 12,345,451 B2Granted

Refrigeration system

AssigneesYork Guangzhou Air Conditioning and Refrigeration Co., Ltd., Tyco Fire & Security GmbH

InventorsDemao Yu, Shuang Wu

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Abstract

Disclosed is a refrigeration system, comprising refrigeration system components, a connecting pipeline, a switch structure, and discharging channels (123, 124; 623, 624). The refrigeration system components comprise three heat exchangers (101; 102; 112). The refrigeration system components can be connected via the connecting pipeline, and are combined into different working systems via the switch structure. When two heat exchangers are selected by the switch structure to form one working system and the saturation temperature corresponding to the internal pressure of the unselected heat exchanger is higher than the medium or environment temperature of the heat exchanger, a liquid refrigerant accumulates inside the non-working heat exchanger. According to the refrigeration system, the switch structure is arranged at either end of the non-working heat exchanger, so that the non-working heat exchanger is isolated from a working system cycle, and under the condition where the pressure at a low-pressure side (C; Q) of the working system is less than the internal pressure of the non-working heat exchanger, additional discharging channels (123, 124; 623, 624) communicate with the non-working heat exchanger and the low-pressure side (C; Q) of the working system, so that the refrigerant accumulating in the non-working heat exchanger is transferred to the system cycle, avoiding a lack of refrigerant in the system cycle.

Claims14

Dependent claims

A refrigeration system, wherein the refrigeration system comprises:

refrigeration system components comprising a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first throttle valve and a second throttle valve;
connecting pipelines configured to connect the refrigeration system components and configured to combine the refrigeration system components in different ways to form a plurality of operating systems, wherein each operating system of the plurality of operating systems is different from one another;
a switch structure configured to connect the connecting pipelines to form an operating system of the plurality of operating systems and configured to select, from the first heat exchanger, the second heat exchanger and the third heat exchanger, two heat exchangers for connection into the operating system, and to isolate a non-selected heat exchanger from the operating system;
and
a discharge path configured to be selectively arranged between the non-selected heat exchanger and a low-pressure side of the operating system;
and
a control device configured to connect the non-selected heat exchanger to the low-pressure side of the operating system via the discharge path in response to:
a temperature of a medium that undergoes heat transfer with a refrigerant in the non-selected heat exchanger being lower than a saturation temperature of refrigerant in the non-selected heat exchanger;
or
a temperature of an environment in which the non-selected heat exchanger is located being lower than the saturation temperature of refrigerant in the non-selected heat exchanger.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/311,276Filed 1 Aug 2019
Priority: CN 201811482252.75 Dec 2018
Published: US 2022/0099345 A131 Mar 2022
Granted: 1 Jul 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F25B 41/20
Fluid-circulation arrangements: disposition of valves, e.g. of on-off valves or flow control valves
F25B 13/00
Compression machines, plants or systems, with reversible cycle
F25B 41/24
Disposition of valves, e.g. of on-off valves or flow control valves: arrangement of shut-off valves for disconnecting a part of the refrigerant…
F25B 41/40
Fluid-circulation arrangements: fluid line arrangements