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1. 发明公开

EP3995757A1 HEAT SOURCE UNIT AND REFRIGERATION DEVICE 有权转让
公开(公告)号：EP3995757A1
公开(公告)日：2022-05-11
申请号：EP20856747.9
申请日：2020-06-26
申请人： Daikin Industries, Ltd.
发明人： TAGUCHI Shuichi , TAKEGAMI Masaaki
IPC分类号： F25B1/00 , F25B1/10 , F25B43/00
摘要： A heat source unit (10) constitutes a refrigeration apparatus (1) by being connected to a utilization-side unit (50, 60). The heat source unit (10) includes a low-stage compression element (22, 23), a high-stage compression element (21), and a heat exchanger (13). The low-stage compression element (22, 23) has a discharge pipe (22b, 23b) provided with a pressure switchgear (82, 83). The high-stage compression element (21) compresses a refrigerant discharged from the low-stage compression element (22, 23). When the low-stage compression element (22, 23) is paused in response to activation of the pressure switchgear (82, 83), the high-stage compression element (21) operates while the low-stage compression element (22, 23) is kept paused.

2. 发明公开

EP4047289A1 INTERMEDIATE UNIT FOR REFRIGERATION DEVICE, AND REFRIGERATION DEVICE 无效转让
公开(公告)号：EP4047289A1
公开(公告)日：2022-08-24
申请号：EP20889034.3
申请日：2020-06-26
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI Masaaki , UENO Akitoshi , TAGUCHI Shuichi , OHZONO Takumi
IPC分类号： F25B41/20 , F24F1/32 , F25B41/00
摘要： An intermediate unit (80) includes a liquid-side pipe (81), a first valve (18), and a refrigerant pressure sensor (48). The liquid-side pipe (81) is connected to a liquid connection pipe (4) connecting a heat source unit (10) and a utilization unit (60) together. A controller (85) of the intermediate unit (80) adjusts the opening degree of the first valve (18) based on a value measured by the refrigerant pressure sensor (48). The pressure of a refrigerant to be sent through the liquid connection pipe (4) from the intermediate unit (80) to the utilization unit (60) is adjusted by the first valve (18).

3. 发明公开

EP3760947A1 REFRIGERATION DEVICE 有权转让
公开(公告)号：EP3760947A1
公开(公告)日：2021-01-06
申请号：EP19775885.7
申请日：2019-03-29
申请人： DAIKIN INDUSTRIES, LTD.
发明人： TAKEGAMI Masaaki , HORITA Takuya , UENO Akitoshi
IPC分类号： F25B13/00 , F25B1/00 , F25B5/02
摘要： A flow path switching mechanism (70) includes first to fourth flow paths (71, 72, 73, 74) and opening and closing mechanisms (V1, V2, V3, V4, 75, 76) that can each open and close a corresponding one of the flow paths (71, 72, 73, 74). A first connection point (C1) connecting an inflow portion of the first flow path (71) and an inflow portion of the second flow path (72) is connected to a discharge portion of a compression unit (30). A second connection point (C2) connecting an outflow portion of the first flow path (71) and an inflow portion of the third flow path (73) is connected to a gas-side end of a heat source heat exchanger (22). A third connection point (C3) connecting an outflow portion of the second flow path (72) and an inflow portion of the fourth flow path (74) is connected to a gas-side end of a second utilization heat exchanger (85, 93). A fourth connection point (C4) connecting an outflow portion of the third flow path (73) and an outflow portion of the fourth flow path (74), and a gas-side end of a first utilization heat exchanger (83) are connected to a suction portion of the compression unit (30).

4. 发明公开

EP3988869A1 REFRIGERATION DEVICE 有权转让
公开(公告)号：EP3988869A1
公开(公告)日：2022-04-27
申请号：EP20840512.6
申请日：2020-06-26
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI Masaaki , UEHARA Yoshikazu , TAGUCHI Shuichi
IPC分类号： F25B1/00 , F24F11/46 , F24F11/83 , F24F11/86 , F24F11/871 , F24F140/12 , F24F140/20
摘要： A refrigerant circuit (6) of a refrigeration apparatus (1) performs a refrigeration cycle in which a high pressure is equal to or greater than the critical pressure of a refrigerant. The refrigeration apparatus (1) performs at least a heat application operation in which an indoor heat exchanger (64a to 64c) of the refrigerant circuit (6) functions as a radiator. A controller (100) of the refrigeration apparatus (1) controls the opening degree of the indoor expansion valve (63a to 63c) of the refrigerant circuit (6) so that the temperature of the refrigerant at the outlet of the indoor heat exchanger (64a to 64c) reaches a predetermined reference temperature, in the heat application operation.

5. 发明公开

EP3985326A1 REFRIGERATION DEVICE 有权转让
公开(公告)号：EP3985326A1
公开(公告)日：2022-04-20
申请号：EP20831461.7
申请日：2020-06-26
申请人： Daikin Industries, Ltd.
发明人： TAKEGAMI Masaaki , TAGUCHI Shuichi , UEHARA Yoshikazu
IPC分类号： F25B1/00 , F25B1/10
摘要： A refrigeration apparatus (1) is of a two-stage compression type for compressing a refrigerant to a supercritical region. The refrigeration apparatus (1) includes a lower stage-side compression unit (22, 23), a higher stage-side compression unit (21), an intermediate cooler (17), a heat source-side heat exchanger (13), a utilization-side heat exchanger (64), an economizer circuit (38), and a control unit (100). During a first operation in which the heat source-side heat exchanger (13) functions as a radiator and the utilization-side heat exchanger (64) functions as an evaporator, in a case where a discharge temperature (Td) which is a temperature of the refrigerant discharged from the higher stage-side compression unit (21) is more than a first temperature, the control unit (100) increases a cooling capacity of the intermediate cooler (17) without increasing a refrigerant flow rate (Q) of the economizer circuit (38) on condition that the intermediate cooler (17) does not reach a maximum cooling capacity.

6. 发明公开

EP3957931A1 UNIT FOR REFRIGERATION DEVICES, HEAT SOURCE UNIT, UTILIZATION UNIT, AND REFRIGERATION DEVICE 有权转让
公开(公告)号：EP3957931A1
公开(公告)日：2022-02-23
申请号：EP20805324.9
申请日：2020-01-31
申请人： DAIKIN INDUSTRIES, LTD.
发明人： TAKEGAMI Masaaki , UENO Akitoshi , HORITA Takuya , KIMURA Naoto
IPC分类号： F25B13/00 , F25B41/06 , F25B1/00
摘要： 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.

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