Heat pump

Patent metadata

Field	Value
Publication number	US-11441794-B2
Application number	US-202016810094-A
Country	US
Kind code	B2
Filing date	Mar 5, 2020
Priority date	Nov 21, 2014
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.

First claim

The invention claimed is:

1. An outdoor unit of a heat pump, the outdoor unit comprising:
a package that includes:
a compressor;
a first heat exchanger in fluid communication with the compressor;
a gas stop valve coupled to the compressor and comprising a gas stop valve inlet and a gas stop valve outlet;
a liquid stop valve having a first flow path that extends in an up-down direction;
a gas filter comprising a gas filter inlet and a gas filter outlet; and
a liquid filter coupled to the liquid stop valve and configured to be coupled, via a liquid pipe, to an indoor unit of the heat pump; and
wherein the liquid filter includes a liquid filter inlet and a liquid filter outlet and has a second flow path that extends through each of the liquid filter inlet, the liquid filter, and the liquid filter outlet in a horizontal direction.

2. The outdoor unit according to claim 1 , where:
the liquid stop valve is coupled to a pressure extraction port; and
a flow path is defined from the compressor to the gas stop valve inlet, through the gas stop valve, to the gas stop valve outlet, to the gas filter inlet, through the gas filter, to the gas filter outlet, and to the indoor unit.

3. The outdoor unit according to claim 1 , wherein the gas filter is configured to receive a gas from the gas stop valve.

4. The outdoor unit according to claim 1 , wherein the gas filter outlet is coupled to a flange configured to be coupled, via a gas pipe, to the indoor unit.

5. The outdoor unit according to claim 1 , wherein the gas stop valve and the gas filter are coupled via a U-shaped connector.

6. The outdoor unit according to claim 1 , wherein the up-down direction is orthogonal to the horizontal direction.

7. The outdoor unit according to claim 1 , where:
the gas filter is coupled to the gas stop valve;
the liquid stop valve includes a liquid stop valve inlet and a liquid stop valve outlet;
the liquid filter is configured to be coupled, via a liquid pipe, to an indoor unit of a heat pump, the indoor unit includes a second heat exchanger and the liquid pipe coupled to the liquid filter;
a flow path is defined from the liquid stop valve inlet, through the liquid stop valve to the liquid stop valve outlet, to the liquid filter inlet, through the liquid filter, to the liquid filter outlet; and
the liquid stop valve extends in a first direction from the liquid stop valve inlet to the liquid stop valve outlet and the liquid filter extends in a second direction from the liquid filter inlet to the liquid filter outlet, the second direction being orthogonal to the first direction.

8. The outdoor unit of claim 7 , wherein the first direction lies in a horizontal plane and the second direction lies in a vertical plane.

9. The outdoor unit of claim 7 , wherein the package that defines a cavity and the compressor, first heat exchanger, gas-stop valve, gas filter, liquid stop valve, and liquid filter are disposed within the cavity.

10. The outdoor unit of claim 7 , wherein the flow path is further defined from the liquid filter outlet, through the liquid pipe, to the second heat exchanger.

11. The outdoor unit of claim 7 , wherein:
the liquid stop valve comprises a first pressure extraction port;
the liquid filter comprises a flare connection member coupled to the liquid filter outlet, the flare connection member includes a second pressure extraction port; and
the first and the second pressure extraction ports are configured to detect a pressure of a fluid in the flow path.

12. The outdoor unit according to claim 7 , where:
the liquid stop valve defines a first channel configured to receive a refrigerant; and
the liquid filter defines a second channel configured to receive the refrigerant from the first channel;
the first channel defines the first flow path in the first direction; and
the second channel defines the second flow path in the second direction.

13. The outdoor unit of claim 12 , wherein:
the first direction extends along a vertical plane; and
the second direction extends along a horizontal plane.

14. The outdoor unit of claim 12 , wherein:
the liquid filter is configured to be coupled, via a liquid pipe, to an indoor unit; and
the gas filter is coupled to a flange configured to be coupled, via a gas pipe, to the indoor unit.

15. The outdoor unit of claim 12 , wherein the liquid stop valve includes a first pressure extraction port.

16. The outdoor unit of claim 15 , wherein the liquid filter comprises a flare connection member that includes a second pressure extraction port.

17. The outdoor unit of claim 16 , wherein the first pressure extraction port is spaced from the second pressure extraction port by a first distance in the first direction.

18. The outdoor unit of claim 16 , wherein:
the second channel comprises an inlet and an outlet and defines the second flow path from the inlet to the outlet;
the flare connection member is coupled to the outlet of the second channel;
the first pressure extraction port is configured to receive a first pressure gauge to detect a first pressure upstream from the second channel; and
the second pressure extraction port is configured to receive a second pressure gauge to detect a pressure downstream of the second channel.

19. An outdoor unit of a heat pump, the outdoor unit comprising:
a package that includes:
a compressor;
a first heat exchanger in fluid communication with the compressor;
a gas stop valve coupled to the compressor;
a gas filter coupled to the gas stop valve;
a liquid stop valve that defines a first channel having a first inlet and a first outlet and configured to receive a refrigerant; and
a liquid filter coupled to the liquid stop valve, the liquid filter defines a second channel having a second inlet and a second outlet and configured to receive the refrigerant from the first channel
wherein:
the first channel defines a first flow path that flows in a first direction at the first inlet and the first outlet; and
the second channel defines a second flow path that flows in a second direction at the second inlet and the second outlet, the second direction being substantially orthogonal to the first direction.

20. A heat pump comprising:
an outdoor unit comprising:
a compressor;
a first heat exchanger in fluid communication with the compressor;
a gas stop valve coupled to the compressor;
a gas filter coupled to the gas stop valve;
a liquid stop valve including a liquid stop valve inlet and a liquid stop valve outlet; and a liquid filter coupled to the liquid stop valve, the liquid filter including a liquid filter inlet and a liquid filter outlet;

an indoor unit comprising a second heat exchanger and a liquid pipe coupled to the liquid filter;
wherein:
the heat pump defines a flow path from the liquid stop valve inlet, through the liquid stop valve to the liquid stop valve outlet, to the liquid filter inlet, through the liquid filter, to the liquid filter outlet; and
the liquid stop valve extends in a first direction from the liquid stop valve inlet to the liquid stop valve outlet and the liquid filter extends in a second direction from the liquid filter inlet to the liquid filter outlet, the second direction being substantially orthogonal to the first direction.

Assignees

• Yanmar Co Ltd
• Yanmar Power Technology Co Ltd

Inventors

• Okuda Norihiro
• Nobuhara Hirohiko

Classifications

• F25B2700/19

  Pressures · CPC title

• F25B2500/04

  Clogging · CPC title

• F25B43/003 Primary

  Filters · CPC title

• F25B41/40

  Fluid line arrangements · CPC title

• F24F1/46

  Component arrangements in separate outdoor units · CPC title