Gas injection type heat management system for vehicle

Patent metadata

Field	Value
Publication number	US-11828505-B2
Application number	US-202217946291-A
Country	US
Kind code	B2
Filing date	Sep 16, 2022
Priority date	Dec 27, 2021
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A gas injection-type heat-management system includes a base flow path sequentially provided with a compressor, an inner condenser, a heat exchanger, a first expansion valve, an outer condenser, a second expansion valve, and an evaporator, a heat exchange flow path branched from the base flow path at an upstream point of the heat exchanger, disposed to be heat-exchangeable with the base flow path in the heat exchanger by passing through a third expansion valve, and joined to the base flow path on the compressor or at an upstream point thereof, a first bypass flow path connected to the base flow path, a second bypass flow path connected to the base flow path, and a recirculation flow path branched from the base flow path at a downstream point of the outer condenser and joined to the heat exchange flow path at an upstream point of the third expansion valve.

First claim

The invention claimed is:

1. A gas injection type heat management system for a vehicle comprising:
a base flow path sequentially provided with a compressor, an inner condenser, a heat exchanger, a first expansion valve, an outer condenser, a second expansion valve, and an evaporator to flow refrigerant;
a heat exchange flow path branched from the base flow path at an upstream point of the heat exchanger, disposed to be heat-exchangeable with the base flow path in the heat exchanger by passing through a third expansion valve, and joined to the base flow path on the compressor or at an upstream point of the compressor;
a first bypass flow path connected to the base flow path to bypass the inner condenser between upstream and downstream points of the inner condenser;
a second bypass flow path connected to the base flow path to bypass the heat exchanger between the upstream point and a downstream point of the heat exchanger; and
a recirculation flow path branched from the base flow path at a downstream point of the outer condenser, and joined to the heat exchange flow path at an upstream point of the third expansion valve.

2. The gas injection type heat management system of claim 1 , further comprising: a gas-liquid separator provided between the evaporator and the compressor of the base flow path to separate the refrigerant into a gaseous state and a liquid state,
wherein the heat exchange flow path is branched to the gas-liquid separator and the compressor and joined to the base flow path.

3. The gas injection type heat management system of claim 1 ,
wherein the compressor is a 2-stage compressive compressor in which the gaseous state refrigerant is additionally injected into a compression intermediate region to mix the refrigerant, and
wherein the heat exchange flow path is connected to the compressor so that the refrigerant is additionally injected to the compression intermediate region.

4. The gas injection type heat management system of claim 1 , further comprising:
a first flow path valve provided at a point branched to the compressor and the upstream point of the compressor of the heat exchange flow path to adjust the presence or absence of the flow or the flow rate of the refrigerant each flowing into the compressor and the upstream point of the compressor;
a second flow path valve provided at a point branched from the base flow path to the first bypass flow path or a point where the first bypass flow path is joined to the base flow path to adjust the presence or absence of the flow or the flow rate of the refrigerant flowing into the first bypass flow path;
a third flow path valve provided at a point branched from the base flow path to the second bypass flow path or a point where the second bypass flow path is joined to the base flow path to adjust the presence or absence of the flow or the flow rate of the refrigerant each flowing into the second bypass flow path; and
a fourth flow path valve provided at a point where the recirculation flow path is joined to the heat exchange flow path to adjust the presence or absence of the flow or the flow rate of the refrigerant flowing through the heat exchange flow path or the refrigerant flowing from the recirculation flow path to the heat exchange flow path.

5. The gas injection type heat management system of claim 4 , further comprising: a controller configured to control the operation of the compressor, to control whether the refrigerant flows or expands by adjusting an opening amount of the first expansion valve, the second expansion valve, or the third expansion valve, and to adjust the presence or absence of the flow or the flow rate of the refrigerant in the base flow path, the heat exchange flow path, the first bypass flow path, the second bypass flow path, or the recirculation flow path by adjusting an opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve.

6. The gas injection type heat management system of claim 5 , wherein in a general heating mode, the controller is configured to dissipate heat in an inner condenser by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve to block the refrigerant of the base flow path from flowing into the second bypass flow path and flowing into the recirculation flow path, the first bypass flow path, or the heat exchange flow path while the refrigerant is circulated in the base flow path.

7. The gas injection type heat management system of claim 5 , wherein in a gas injection heating mode, the controller is configured to increase the flow rate of the refrigerant flowing into the inner condenser by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base flow path flows into the compressor through the heat exchange flow path while the refrigerant is circulated in the base flow path.

8. The gas injection type heat management system of claim 5 , wherein in a general cooling mode, the controller is configured to absorb heat in the evaporator while dissipating the heat in the outer condenser by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base flow path flows into the first bypass flow path while the refrigerant is circulated in the base flow path.

9. The gas injection type heat management system of claim 5 , wherein in a first liquid injection cooling mode, the controller is configured to reduce the temperature of the refrigerant flowing into the compressor by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base flow path flows into the first bypass flow path and the second bypass flow path and flows into an upstream point of the compressor through the recirculation flow path and the heat exchange flow path while the refrigerant is circulated in the base flow path.

10. The gas injection type heat management system of claim 5 , wherein in a second liquid injection cooling mode, the controller is configured to reduce a compression ratio of the compressor by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base flow path flows into the first bypass flow path and the second bypass flow path and flows into the compressor through the recirculation flow path and the heat exchange flow path while the refrigerant is circulated in the base flow path.

11. The gas injection type heat management system of claim 5 , wherein in a first sub-cooling cooling mode, the controller is configured to super-cool the refrigerant by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base flow path flows into the first bypass flow path and flows into the compressor through the recirculation flow path and the heat exchange flow path while the refrigerant is circulated in the base flow path.

12. The gas injection type heat management system of claim 5 , wherein in a second sub-cooling cooling mode, the controller is configured to super-cool the refrigerant by adjusting the opening amount of the first flow path valve, the second flow path valve, the third flow path valve, or the fourth flow path valve so that the refrigerant of the base fl

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Kim Jong Won

Classifications

• F25B41/42 Primary

  Arrangements for diverging or converging flows, e.g. branch lines or junctions · CPC title

• B60H1/00899

  Controlling the flow of liquid in a heat pump system (controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204) · CPC title

• B60H1/32

  Cooling devices {(B60H1/00478, B60H1/005 take precedence)} · CPC title

• F25B1/10

  with multi-stage compression (with cascade operation F25B7/00) · CPC title

• F25B41/20

  Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31) · CPC title