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1. 发明公开

EP4170258A1 REFRIGERATION SYSTEM AND HEAT SOURCE UNIT 审中-实审
公开(公告)号：EP4170258A1
公开(公告)日：2023-04-26
申请号：EP21834565.0
申请日：2021-06-02
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , TAGUCHI, Shuichi
IPC分类号： F25B13/00 , F25B1/00 , F24F11/32 , F24F11/84 , F25B41/20
摘要： A refrigerant circuit (11), in which carbon dioxide circulates as a refrigerant, includes a plurality of heat exchangers (12), a receiver (60), a degassing passage (61), and a degassing valve (62). The refrigeration system implements a first operation during which one of the plurality of heat exchangers (12) functions as a radiator while two of the plurality of heat exchangers (12) function as evaporators, and the refrigerant flows from the heat exchanger (12) functioning as a radiator into the receiver (60) and then flows from the receiver (60) into each of the two heat exchangers (12) functioning as evaporators. The control unit (15) changes the degassing valve (62) from a closed state to an open state when a pressure (RP) in the receiver (60) exceeds a first pressure (Pth1) set in advance, in the first operation.

2. 发明公开

EP4166867A1 HEAT SOURCE UNIT AND REFRIGERATION DEVICE 审中-实审
公开(公告)号：EP4166867A1
公开(公告)日：2023-04-19
申请号：EP21860934.5
申请日：2021-06-18
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , UEHARA, Yoshikazu , UENO, Akitoshi
IPC分类号： F25B5/02 , F25B1/00 , F25B1/10 , F25B41/26
摘要： If a first condition that an intermediate pressure corresponding to a pressure of an intermediate flow path (18) is greater than a predetermined value is satisfied in an operation in which first, second, and third compressors (21), (22), and (23) are operated, the control unit (101) executes a first action of increasing the number of revolutions of the third compressor (23).

3. 发明公开

EP3940315A1 REFRIGERATION DEVICE UNIT, HEAT SOURCE UNIT, AND REFRIGERATION DEVICE 审中-实审转让
公开(公告)号：EP3940315A1
公开(公告)日：2022-01-19
申请号：EP20782150.5
申请日：2020-01-31
申请人： DAIKIN INDUSTRIES, LTD.
发明人： TAKEGAMI, Masaaki , TAGUCHI, Shuuichi
IPC分类号： F25B13/00 , F25B41/04 , F25B1/00 , F25B1/10
摘要： A switching mechanism (TV1, TV2, TV3, TV4, FV) includes an electric motor (74), a flow path switching portion (71) to be driven by the electric motor (74), a first port (P1) connected to a high-pressure flow path (7, 24, 28b, 31, 32) of a refrigerant circuit (6), a second port (P2) connected to a low-pressure flow path (8, 25, 28a, 33, 34) of the refrigerant circuit (6), and a third port (P3) connected to a predetermined flow path of the refrigerant circuit (6). The switching mechanism (TV1, TV2, TV3, TV4, FV) is switched between a first state in which the first port (P1) communicates with the third port (P3) and a second state in which the second port (P2) communicates with the third port (P3) in such a manner that the electric motor (74) drives the flow path switching portion (71).

4. 发明公开

EP3290825A1 REFRIGERATION APPARATUS 有权
标题翻译：制冷设备
公开(公告)号：EP3290825A1
公开(公告)日：2018-03-07
申请号：EP16786103.8
申请日：2016-03-30
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , KONDOU, Azuma
IPC分类号： F25B1/00
CPC分类号： F25B1/00 , F25B31/004 , F25B40/02 , F25B49/02 , F25B2500/31 , F25B2600/2509 , F25B2700/2101 , F25B2700/21152
摘要： A control section (13) performs first and second degree-of-opening adjusting operations in a cooling mode. In the first degree-of-opening adjusting operation, the control section (13) adjusts the degree of opening of an intermediate expansion valve (36a, 36b, 36c) such that the temperature (Td) of a refrigerant discharged from a compressor (31 a, 31b, 31c) is below a higher discharged refrigerant temperature threshold (Tdth). In the second degree-of-opening adjusting operation, the control section (13) adjusts the degree of opening of a supercooling expansion valve (35) such that the temperature of a refrigerant flowing through a portion of an injection pipe (54) between a supercooling heat exchanger (34) and the intermediate expansion valve (36a, 36b, 36c) is above a freezing temperature threshold (Tfth).
摘要翻译：控制部分（13）以冷却模式执行第一和第二开度调节操作。在第一开度调整动作中，控制部13调整中间膨胀阀36a，36b，36c的开度，使得从压缩机31排出的制冷剂的温度Td a，31b，31c）低于较高的排放制冷剂温度阈值（Tdth）。在第二开度调节动作中，控制部（13）调节过冷却膨胀阀（35）的开度，以使流过喷射管（54）的一部分的制冷剂的温度过冷却热交换器（34）和中间膨胀阀（36a，36b，36c）高于冷冻温度阈值（Tfth）。

5. 发明授权

EP2023061B1 REFRIGERATION SYSTEM 失效
标题翻译：制冷系统
公开(公告)号：EP2023061B1
公开(公告)日：2017-09-27
申请号：EP07744122.8
申请日：2007-05-25
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , NOMURA, Kazuyoshi , KONDO, Azuma , ODA, Yoshinari , TANIMOTO, Kenji
IPC分类号： F25B13/00 , F24F11/02 , F25B1/10
CPC分类号： F25B13/00 , F25B1/10 , F25B2313/0231 , F25B2313/0233 , F25B2313/02743 , F25B2313/0314 , F25B2400/0751 , F25B2400/19 , F25B2400/22 , F25B2600/2513 , F25B2700/04

6. 发明公开

EP2402681A1 REFRIGERATION UNIT 失效
标题翻译：冷却装置
公开(公告)号：EP2402681A1
公开(公告)日：2012-01-04
申请号：EP09840728.1
申请日：2009-11-30
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , SAKAE, Satoru , KONDOU, Azuma , TAKEUCHI, Ryuuji
IPC分类号： F25B1/00
CPC分类号： F25B13/00 , F25B31/004 , F25B2313/005 , F25B2313/0233 , F25B2313/02743
摘要： In a refrigerant circuit (20), the variable capacity compressor (40a) sucks refrigerant through a first suction pipe (51), and a second fixed capacity compressor (40c) sucks refrigerant through a third suction pipe (53). Refrigeration oil of an oil separator (47a-47c) flows into the compressor (40a-40c) through an oil return pipe (54) and a main injection pipe (61) together with intermediate-pressure refrigerant. During a normal operation, a controller (200) adjusts the degree of opening of an injection motor-operated valve (64a-64c) so that the temperature of refrigerant discharged from the corresponding compressor reaches a predetermined target value. If the first suction pipe (51) has a pressure lower than that of the third suction pipe (53), the controller temporarily decreases the degree of opening of the first injection motor-operated valve (64a) as compared to that during the normal operation, and temporarily increases the degree of opening of the third injection motor-operated valve (64c) as compared to that during the normal operation. As a result, the flow rate of intermediate-pressure refrigerant and refrigeration oil flowing into the second fixed capacity compressor (40c) is increased.

7. 发明公开

EP2192361A1 REFRIGERATION DEVICE 有权
标题翻译：制冷设备
公开(公告)号：EP2192361A1
公开(公告)日：2010-06-02
申请号：EP08828804.8
申请日：2008-08-28
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , SAKAE, Satoru
IPC分类号： F25B1/00 , F25B13/00
CPC分类号： F25B41/046 , F25B13/00 , F25B49/022 , F25B2313/02743 , F25B2313/02792 , F25B2313/0292 , F25B2400/075 , F25B2500/26 , F25B2600/021 , Y02B30/741
摘要： A refrigeration device (1) includes a switching valve control section (58) for outputting a switching signal for controlling a four-way switching valve (20) to a predetermined switching state when starting a compression mechanism (40); and a switching determination section (59) which, when starting only a first compressor (14a) as a start-up of the compression mechanism (40), outputs a low differential pressure signal if a differential pressure between a high-pressure port (P1) and a low-pressure port (P3) in the four-way switching valve (20) falls below a determination value in a determination operation after the switching signal being outputted by the switching valve control section (58). After the switching determination section (59) outputs the low differential pressure signal, a capacity control section (51) starts a second compressor (14b).
摘要翻译：本发明的制冷装置（1）具备：切换阀控制部（58），其在启动压缩机构（40）时将用于控制四通切换阀（20）的切换信号输出至规定的切换状态。以及切换判定部（59），在仅使作为压缩机构（40）的启动的第一压缩机（14a）起动时，在高压端口（P1）与高压端口）和四通切换阀（20）中的低压端口（P3）在由切换阀控制部（58）输出的切换信号之后的判定操作中低于判定值。在切换判定部分（59）输出低压差信号之后，容量控制部分（51）启动第二压缩机（14b）。

8. 发明公开

EP2023060A1 FREEZING APPARATUS 审中-公开
标题翻译：冷冻设备
公开(公告)号：EP2023060A1
公开(公告)日：2009-02-11
申请号：EP07744293.7
申请日：2007-05-29
申请人： Daikin Industries, Ltd.
发明人： SAKAE, Satoru , TAKEGAMI, Masaaki , NAKAJIMA, Hiroto , SHINOHARA, Iwao
IPC分类号： F25B1/00
CPC分类号： F25B31/004 , F25B13/00 , F25B41/003 , F25B2400/075
摘要： A refrigeration system (1) includes first to third compressors (11a, 11b, 11c) connected in parallel and an oil separator for separating a refrigeration oil from a refrigerant discharged from the compressors (11a, 11b, 11c). A main suction pipe (55) in which a refrigerant to be sucked into the compressors (11a, 11b, 11c) flows includes a primary curved portion (101) and a primary branch element (102) assembled to part of the main suction pipe (55) downstream of a junction with an oil return pipe (71) for returning the refrigeration oil separated by the oil separator. The main suction pipe (55) is branched by the primary branch element (102) into a first suction pipe branch (61a) of the first compressor (11a) and a connecting suction pipe (56). In the primary branch element (102), the first suction pipe branch (61a) is at the bottommost position and the outermost position in the direction of a radius of curvature of the primary curved portion (101).
摘要翻译：本发明的冷冻装置（1）具有并联连接的第一〜第三压缩机（11a，11b，11c）和从压缩机（11a，11b，11c）排出的制冷剂中分离冷冻机油的油分离器。吸入压缩机（11a，11b，11c）的制冷剂流入的主吸入管（55）包括主弯曲部分（101）和组装到主吸入管（101）的一部分的主分支元件（102） 55）在与回油管（71）连接的下游，用于返回由油分离器分离的冷冻机油。主吸入管55由主分支部件102分支成第一压缩机11a的第一吸入分支管61a和连接吸入管56。在主分支元件（102）中，第一吸气管分支（61a）位于主弯曲部分（101）的曲率半径方向上的最下位置和最外位置。

9. 发明公开

EP4303504A1 HEAT SOURCE UNIT AND REFRIGERATION DEVICE 审中-实审
公开(公告)号：EP4303504A1
公开(公告)日：2024-01-10
申请号：EP22779956.6
申请日：2022-03-11
申请人： DAIKIN INDUSTRIES, LTD.
发明人： TAKEGAMI, Masaaki , KIMURA, Naoto , KANEDA, Masahiko
IPC分类号： F25B13/00 , F25B1/00 , F25B1/10 , F25B41/26
摘要： A heat source unit (10) connected to a utilization-side unit (50) and configured to perform a refrigeration cycle includes a low-stage compressor (23), a high-stage compressor (21), a four-way switching valve (150), a low-stage pipe (24c), and a controller (101). The low-stage pipe (24c) is provided in parallel with the low-stage compressor (23), and the refrigerant flows therethrough while the low-stage compressor (23) is stopped. The controller (101) outputs an instruction signal for actuating the four-way switching valve (150), to the four-way switching valve (150) while the low-stage compressor (23) is stopped and the high-stage compressor (21) is operating.

10. 发明公开

EP4015936A1 HEAT SOURCE UNIT AND REFRIGERATION DEVICE 有权转让
公开(公告)号：EP4015936A1
公开(公告)日：2022-06-22
申请号：EP20873075.4
申请日：2020-06-26
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI, Masaaki , TAGUCHI, Shuichi
IPC分类号： F25B1/00 , F25B1/10
摘要： A heat source-side unit (10) includes a heat source-side circuit (11). The heat source-side circuit (11) includes a compression unit (20) including a lower-stage compression element (23) and a higher-stage compression element (21), an intermediate heat exchanger (17) disposed on a refrigerant path between the lower-stage compression element (23) and the higher-stage compression element (21), and a bypass passage (23c) connected to a suction pipe (23a) and a discharge pipe (23b) each connected to the lower-stage compression element (23). At startup of the compression unit (20), a first action is performed for stopping the lower-stage compression element (23) and operating the higher-stage compression element (21). This configuration thus suppresses occurrence of liquid compression at startup of a compressor.

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