Air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-11441802-B2
Application number	US-202016913506-A
Country	US
Kind code	B2
Filing date	Jun 26, 2020
Priority date	Dec 18, 2017
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An air conditioning apparatus 1 includes a compressor (321), an indoor heat exchanger (242) that is a use-side heat exchanger that exchanges heat with first air (F1), an outdoor heat exchanger (323) that is a heat-source-side heat exchanger that exchanges heat with second air, a refrigerant, a first duct (209), and a casing (230). The refrigerant contains at least 1,2-difluoroethylene, and circulates in the compressor (321), the indoor heat exchanger (242), and the outdoor heat exchanger (323) to repeat a refrigeration cycle. The first duct (209) supplies the first air (F1) to a plurality of rooms in an interior. The casing (230) includes a use-side space (SP2) that is connected to the first duct (209) and that accommodates the indoor heat exchanger (242). The casing (230) is configured to allow the first air (F1) after heat exchange with the refrigerant at the indoor heat exchanger (242) to be sent out to the first duct (209).

First claim

The invention claimed is:

1. An air conditioning apparatus comprising:
a compressor;
a use-side heat exchanger that exchanges heat with first air;
a heat-source-side heat exchanger that exchanges heat with second air;
a refrigerant that circulates in the compressor, the use-side heat exchanger, and the heat-source-side heat exchanger to repeat a refrigeration cycle;
a first duct that supplies the first air to a plurality of rooms in an interior; and
a casing that includes a use-side space that is connected to the first duct and that accommodates the use-side heat exchanger, the casing being configured to allow the first air after heat exchange with the refrigerant at the use-side heat exchanger to be sent out to the first duct,
wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and
wherein
when the mass % of HFO-1132(E), HFO-1123, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments AA′, A′B, BD, DC′, C′C, CO, and OA that connect the following 7 points:

point A (68.6, 0.0, 31.4),
point A′ (30.6, 30.0, 39.4),
point B (0.0, 58.7, 41.3),
point D (0.0, 80.4, 19.6),
point C′ (19.5, 70.5, 10.0),
point C (32.9, 67.1, 0.0), and
point O (100.0, 0.0, 0.0),
or on the above line segments (excluding the points on the line segments BD, CO, and OA);
the line segment AA′ is represented by coordinates (x, 0.0016x 2 −0.9473x+57.497, −0.0016x 2 −0.0527x+42.503),
the line segment A′B is represented by coordinates (x, 0.0029x 2 −1.0268x+58.7, −0.0029x 2 +0.0268x+41.3),
the line segment DC′ is represented by coordinates (x, 0.0082x 2 −0.6671x+80.4, −0.0082x 2 −0.3329x+19.6),
the line segment C′C is represented by coordinates (x, 0.0067x 2 −0.6034x+79.729, −0.0067x 2 −0.3966x+20.271), and
the line segments BD, CO, and OA are straight lines.

2. The air conditioning apparatus according to claim 1 , comprising:
a second duct that introduces the first air from the interior;
a use-side unit that includes the casing and that is configured to guide the first air introduced from the interior to the use-side heat exchanger with the casing connected to the second duct; and
a heat-source-side unit that accommodates the heat-source-side heat exchanger and that differs from the use-side unit.

3. The air conditioning apparatus according to claim 1 , comprising:
a third duct that introduces the first air from an exterior;
a use-side unit that includes the casing and that is configured to guide the first air introduced from the exterior to the use-side heat exchanger with the casing connected to the third duct; and
a heat-source-side unit that accommodates the heat-source-side heat exchanger and that differs from the use-side unit.

4. The air conditioning apparatus according to claim 1 , comprising:
a second duct that is connected to the casing and that supplies the first air introduced from the interior to the use-side space,
wherein the casing is provided with a partition plate that partitions the casing ( 730 ) into a heat-source-side space through which the second air introduced from an exterior passes and the use-side space to prevent circulation of air in the heat-source-side space and the use-side space, and
wherein the heat-source-side heat exchanger is disposed in the heat-source-side space.

5. An air conditioning apparatus comprising:
a compressor;
a use-side heat exchanger that exchanges heat with first air;
a heat-source-side heat exchanger that exchanges heat with second air;
a refrigerant that circulates in the compressor, the use-side heat exchanger, and the heat-source-side heat exchanger to repeat a refrigeration cycle;
a first duct that supplies the first air to a plurality of rooms in an interior; and
a casing that includes a use-side space that is connected to the first duct and that accommodates the use-side heat exchanger, the casing being configured to allow the first air after heat exchange with the refrigerant at the use-side heat exchanger to be sent out to the first duct,
wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and
wherein
when the mass % of HFO-1132(E), R32, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), R32, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments IJ, JN, NE, and EI that connect the following 4 points:

point I (72.0, 0.0, 28.0),
point J (48.5, 18.3, 33.2),
point N (27.7, 18.2, 54.1), and
point E (58.3, 0.0, 41.7),
or on these line segments (excluding the points on the line segment EI;
the line segment IJ is represented by coordinates (0.0236y 2 −1.7616y+72.0, y, −0.0236y 2 +0.7616y+28.0);
the line segment NE is represented by coordinates (0.012y 2 −1.9003y+58.3, y, −0.012y 2 +0.9003y+41.7); and
the line segments JN and EI are straight lines.

6. The air conditioning apparatus according to claim 5 , comprising:
a second duct that introduces the first air from the interior;
a use-side unit that includes the casing and that is configured to guide the first air introduced from the interior to the use-side heat exchanger with the casing connected to the second duct; and
a heat-source-side unit that accommodates the heat-source-side heat exchanger and that differs from the use-side unit.

7. The air conditioning apparatus according to claim 5 , comprising:
a third duct that introduces the first air from an exterior;
a use-side unit that includes the casing and that is configured to guide the first air introduced from the exterior to the use-side heat exchanger with the casing connected to the third duct; and
a heat-source-side unit that accommodates the heat-source-side heat exchanger and that differs from the use-side unit.

8. The air conditioning apparatus according to claim 5 , comprising:
a second duct that is connected to the casing and that supplies the first air introduced from the interior to the use-side space,
wherein the casing is provided with a partition plate that partitions the casing ( 730 ) into a heat-source-side space through which the second air introduced from an exterior passes and the use-side space to prevent circulation of air in the heat-source-side space and the use-side space, and
wherein the heat-source-side heat exchanger is disposed in the heat-source-side space.

9. An air conditioning apparatus comprising:
a compressor;
a use-side heat exchanger that exchanges heat with first air;
a heat-source-side heat exchanger that exchanges heat with second air;
a refrigerant that circulates in the compressor, the use-side heat exchanger, and the heat-source-side heat exchanger to repeat a refrigeration cycle;
a first duct that supplies the first air to a plurality of rooms in an interior; and
a casing that includes a use-side space that is connected to the first duct and that accommodates the use-side heat exchanger, the casing being configured to allow the first air after heat exchange with the refrigerant at the use-side heat exchanger to be sent out to the first duct,
wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and
wherein
when the mass % of HFO-1132(E), R

Assignees

• Daikin Ind Ltd

Inventors

• Itano Mitsushi
• Karube Daisuke
• Yotsumoto Yuuki
• Takahashi Kazuhiro
• Komatsu Yuzo
• Ohkubo Shun
• Takakuwa Tatsuya
• Tsuda Tetsushi
• Yanagi Yuuichi

Classifications

• F25B9/006

  the refrigerant containing more than one component (F25B9/004 takes precedence) · CPC title

• F24F1/0003

  characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units · CPC title

• F24F1/00077

  receiving heat exchange fluid entering and leaving the unit as a liquid · CPC title

• F24F13/20

  Casings or covers · CPC title

• F24F1/30

  for use inside the separate outdoor units · CPC title