Refrigeration apparatus-use unit, heat source unit, utilization unit, and refrigeration apparatus

Patent metadata

Field	Value
Publication number	US-2022120480-A1
Application number	US-202117512819-A
Country	US
Kind code	A1
Filing date	Oct 28, 2021
Priority date	May 15, 2019
Publication date	Apr 21, 2022
Grant date	—

Abstract

A valve mechanism (14a, 14b, 63a, 63b, 90) includes: a valve body (80, 95); a first flow path (81) located opposite a distal end (80a, 95b) of the valve body (80, 95); a driver (85) configured to move the valve body (80, 95) to a first position where the distal end (80a, 95b) of the valve body (80, 95) closes the first flow path (81) and a second position where the distal end (80a, 95b) of the valve body (80) opens the first flow path (81); and a second flow path (82) configured to communicate with the first flow path (81) when the valve body (80) is at the second position. The high-pressure flow path (I1, I2, O2, O3, 48) causes the high-pressure refrigerant to always flow through the second flow path (82) and first flow path (81) of the valve mechanism (14a, 14b, 63a, 63b, 90) in this order.

First claim

1 . A refrigeration apparatus-use unit for a refrigeration apparatus ( 1 ) including a refrigerant circuit ( 6 ) including a compression unit (C), a utilization-side heat exchanger ( 64 ), and a heat source-side heat exchanger ( 13 ), the refrigerant circuit ( 6 ) being configured to perform a refrigeration cycle in which a pressure above a critical pressure is applied to a refrigerant,
the refrigeration apparatus-use unit comprising: at least one high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ) through which the high-pressure refrigerant in the refrigerant circuit ( 6 ) flows; and a valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) connected to the high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ), wherein the valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) includes:
a valve body ( 80 , 95 );
a first flow path ( 81 ) located opposite a distal end ( 80 a, 95 b ) of the valve body ( 80 , 95 );
a driver ( 85 ) configured to move the valve body ( 80 , 95 ) to a first position where the distal end ( 80 a, 95 b ) of the valve body ( 80 , 95 ) closes the first flow path ( 81 ) and a second position where the distal end ( 80 a, 95 b ) of the valve body ( 80 ) opens the first flow path ( 81 ); and
a second flow path ( 82 ) configured to communicate with the first flow path ( 81 ) when the valve body ( 80 ) is at the second position, and
the high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ) causes the high-pressure refrigerant to always flow through the second flow path ( 82 ) and first flow path ( 81 ) of the valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) in this order.

2 . The refrigeration apparatus-use unit according to claim 1 , wherein
the valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) comprises an expansion valve ( 14 a, 14 b, 63 a, 63 b ).

3 . The refrigeration apparatus-use unit according to claim 1 , wherein
the high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ) includes a regulation mechanism (CV 4 , CV 5 , CV 8 , CV 9 , CV 10 ) configured to permit the refrigerant to flow through the second flow path ( 82 ) and first flow path ( 81 ) of the valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) in this order and to prohibit the refrigerant from flowing through the first flow path ( 81 ) and the second flow path ( 82 ) in this order.

4 . The refrigeration apparatus-use unit according to claim 3 , wherein
the refrigerant circuit ( 6 ) switches to a first refrigeration cycle in which the heat source-side heat exchanger ( 13 ) serves as a radiator and the utilization-side heat exchanger ( 64 ) serves as an evaporator and a second refrigeration cycle in which the utilization-side heat exchanger ( 64 ) serves as a radiator and the heat source-side heat exchanger ( 13 ) serves as an evaporator, the at least one high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ) comprises two high-pressure flow paths (I 1 , I 2 , O 2 , O 3 ), the two high-pressure flow paths (I 1 , I 2 , O 2 , O 3 ) are connected in parallel to constitute a parallel circuit (IP, OP), each of the high-pressure flow paths (I 1 , I 2 , O 2 , O 3 ) is connected to the valve mechanism ( 14 a, 14 b, 63 a, 63 b ) and the regulation mechanism (CV 4 , CV 5 , CV 8 , CV 9 ), and the parallel circuit (IP, OP) causes the refrigerant to flow through one of the high-pressure flow paths (I 1 , I 2 , O 2 , O 3 ) and the refrigerant to flow through the other high-pressure flow path (I 1 , I 2 , O 2 , O 3 ) in opposite directions.

5 . The refrigeration apparatus-use unit according to claim 3 , wherein
the regulation mechanism comprises a check valve (CV 4 , CV 5 , CV 8 , CV 9 , CV 10 ).

6 . The refrigeration apparatus-use unit according to claim 1 , wherein
the refrigerant in the refrigerant circuit ( 6 ) comprises carbon dioxide.

7 . The refrigeration apparatus-use unit according to claim 2 , wherein
the high-pressure flow path (I 1 , I 2 , O 2 , O 3 , 48 ) includes a regulation mechanism (CV 4 , CV 5 , CV 8 , CV 9 , CV 10 ) configured to permit the refrigerant to flow through the second flow path ( 82 ) and first flow path ( 81 ) of the valve mechanism ( 14 a, 14 b, 63 a, 63 b, 90 ) in this order and to prohibit the refrigerant from flowing through the first flow path ( 81 ) and the second flow path ( 82 ) in this order.

8 . The refrigeration apparatus-use unit according to claim 4 , wherein
the regulation mechanism comprises a check valve (CV 4 , CV 5 , CV 8 , CV 9 , CV 10 ).

9 . The refrigeration apparatus-use unit according to claim 2 , wherein
the refrigerant in the refrigerant circuit ( 6 ) comprises carbon dioxide.

10 . The refrigeration apparatus-use unit according to claim 3 , wherein
the refrigerant in the refrigerant circuit ( 6 ) comprises carbon dioxide.

11 . The refrigeration apparatus-use unit according to claim 4 , wherein
the refrigerant in the refrigerant circuit ( 6 ) comprises carbon dioxide.

12 . The refrigeration apparatus-use unit according to claim 5 , wherein
the refrigerant in the refrigerant circuit ( 6 ) comprises carbon dioxide.

13 . A heat source unit for a refrigeration apparatus ( 1 ) including a refrigerant circuit ( 6 ) including a compression unit (C) and a heat source-side heat exchanger ( 13 ), the refrigerant circuit ( 6 ) being configured to perform a refrigeration cycle in which a pressure above a critical pressure is applied to a refrigerant,
the heat source unit comprising the refrigeration apparatus-use unit according to claim 1 .

14 . A utilization unit for a refrigeration apparatus ( 1 ) including a refrigerant circuit ( 6 ) including a utilization-side heat exchanger ( 64 ), the refrigerant circuit ( 6 ) being configured to perform a refrigeration cycle in which a pressure above a critical pressure is applied to a refrigerant,
the utilization unit comprising the refrigeration apparatus-use unit according to claim 1 .

15 . A refrigeration apparatus comprising
the refrigeration apparatus-use unit according to claim 1 for the refrigeration apparatus ( 1 ) including the refrigerant circuit ( 6 ) including the compression unit (C), the utilization-side heat exchanger ( 64 ), and the heat source-side heat exchanger ( 13 ), the refrigerant circuit ( 6 ) being configured to perform the refrigeration cycle in which a pressure above the critical pressure is applied to the refrigerant.

Assignees

• Daikin Ind Ltd

Inventors

• Takegami Masaaki
• Ueno Akitoshi
• HORITA Takuya
• Kimura Naoto

Classifications

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title

• F25B9/008

  the refrigerant being carbon dioxide · CPC title

• F25B41/20 Primary

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

• F25B1/10

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

• F25B2600/111

  of condenser fans · CPC title