US 2021/0199355 A1Published application

Gas heat-pump system and method of controlling same

AssigneeLG Electronics Inc.

InventorsHeejoong JANG, Jinwoo LEE, Hojong JEONG

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Abstract

Proposed is a gas heat-pump system including: a compressor discharging compressed refrigerant; an indoor heat exchanger causing heat exchange to occur between indoor air and the refrigerant; an outdoor heat exchanger condensing the refrigerant; a four-way valve switching a flow direction; an engine; a radiator cooling heated coolant; an exhaust gas heat exchanger causing the heat exchange to occur between the coolant passing through the radiator and exhaust gas from the engine; and a first three-way valve switching a flow direction of the coolant and controlling an amount of the flowing coolant in such a manner that the coolant passing through the radiator flows toward at least one of the exhaust gas heat exchanger and the engine.

Claims15

Dependent claims

A gas heat-pump system comprising:

a compressor compressing refrigerant and discharging the compressed refrigerant;
an indoor heat exchanger causing heat exchange to occur between indoor air and the refrigerant and thus cooling or heating an indoor space;
an outdoor heat exchanger condensing the refrigerant;
a four-way valve switching a flow direction of the refrigerant in such a manner that the refrigerant discharged from the compressor flows toward the outdoor heat exchanger in a cooling operation mode and flows toward the indoor heat exchanger in a heating operation mode;
an engine providing a drive force to the compressor;
a radiator cooling coolant that is heated while passing through the engine;
an exhaust gas heat exchanger causing the heat exchange to occur between the coolant passing through the radiator and exhaust gas discharged from the engine;
and
a first three-way valve switching a flow direction of the coolant and controlling an amount of the flowing coolant in such a manner that the coolant passing through the radiator flows toward at least one of the exhaust gas heat exchanger and the engine.

6 more elements

A method of controlling a gas heat-pump system, the system being configured in such a manner that, with a second three-way valve, coolant cooling an engine supplying a drive force to a compressor flows toward a radiator or an auxiliary heat exchanger, and that, with a first three-way valve, the coolant passing through the radiator or the auxiliary heat exchanger flows along a bypass coolant line along which the coolant is to circulate directly toward the engine or flows along a main coolant line along which the coolant is to circulate toward the engine after passing through an exhaust gas heat exchanger and an exhaust manifold, the method comprising:

determining which of a cooling operation mode and a heating operation mode is selected;
controlling the second three-way valve in a manner that corresponds to the selected operation mode;
and
controlling the first three-way valve in a manner that corresponds to the selected operation mode.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 17/136,201Filed 29 Dec 2020
Priority: KR 10-2019-017815330 Dec 2019
Published: 1 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F25B 25/005
Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00: using primary…
F25B 30/02
Heat pumps: of the compression type
F25B 13/00
Compression machines, plants or systems, with reversible cycle
F25B 27/02
Machines, plants or systems, using particular sources of energy: using waste heat, e.g. from internal-combustion engines