Daikin Industries, Ltd. is a Japanese multinational air conditioner manufacturing company headquartered in Osaka. It has operations in Japan, China, Australia, India, Southeast Asia, Europe, and North America.Daikin codeveloped a R-410A refrigerant with Carrier and is an innovator in the Split System Air Conditioning Market, and is the inventor of Variable Refrigerant Flow air conditioning systems . Wikipedia.


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Patent
Daikin | Date: 2015-10-02

A centrifugal compressor for a chiller includes a casing, an inlet guide vane, an impeller downstream of the inlet guide vane, a motor and a diffuser. The casing has inlet and outlet portions with the inlet guide vane disposed in the inlet portion. The impeller is rotatable about a rotation axis defining an axial direction, and the impeller is adjustably mounted within the casing along the axial direction between at least a first flow rate position and a second flow rate position. The motor rotates the impeller. The diffuser is disposed in the outlet portion downstream from the impeller with a outlet port of the outlet portion being disposed between the impeller and the diffuser.


Patent
Daikin | Date: 2015-10-02

A centrifugal compressor for a chiller includes a casing, an inlet guide vane, an impeller downstream of the inlet guide vane, a rotational magnetic bearing, a magnetic bearing sensor, a motor, a diffuser and a controller. The casing has inlet and outlet portions with the inlet guide vane disposed in the inlet portion. The impeller is attached to a shaft. The radial magnetic bearing rotatably supports the shaft. The magnetic bearing sensor detects at least one of a position signal indicative of the shafts position and a current signal indicative of current supplied to the magnetic bearing. The motor rotates the shaft in order to rotate the impeller. The diffuser is disposed in the outlet portion downstream from the impeller. An outlet port of the outlet portion is disposed between the impeller and the diffuser. The controller is programmed to predict surge based on the position signal and/or the current signal.


Patent
Daikin Industries Ltd and Daikin | Date: 2017-06-21

A heat exchange system (1) comprises a heat exchange main unit (10), a housing (9), a drain collecting part (4) and a siphon (200). The heat exchange main unit (10) has a gas channel (40) and a fluid channel (60, 70) configured such that a fluid in the fluid channel (60, 70) exchanges heat with the flue gas in the gas channel (40) in use. The housing (9) accommodates the heat exchange main unit (10). The drain collecting part (4) is arranged inside the housing (9) and collects condensate from the flue gas. The siphon (200) is detachably attached to the drain collecting part (4) to prevent the release of the flue gas from a condensate outlet (204) formed therein. The siphon (200) has a tubular body (210). A condensate inlet (202) is formed on one end side of the tubular body (210) and the condensate outlet (204) is formed on the other end side of the tubular body (210). The tubular body (210) has an attaching part (212) and a grip (214). The attaching part (212) is arranged on the end side of tubular body (210) on which the condensate inlet (202) is formed. The tubular body (210) is configured to detachably attach the tubular body (210) to the drain collecting part (4) through a hole (94) formed within a bottom wall (92) of the housing (9). The grip (214) is arranged on the other end side of the tubular body (210) on which condensate outlet (204) is formed. The grip (214) is configured to be located outside the housing (9) when the tubular body (210) is attached to the drain collecting part (4).


Patent
Daikin Industries Ltd and Daikin | Date: 2017-06-21

A heat exchanger system (1) comprises a heat exchange main unit (10), a housing (9), a drain collecting part (4) and a siphon (200). The heat exchange main unit (10) has a gas channel (40) and a fluid channel (60, 70) configured such that a fluid in the fluid channel (60, 70) exchanges heat with the flue gas in the gas channel (40) in use. The housing (9) accommodates the heat exchange main unit (10). The drain collecting part (4) is arranged inside the housing (9) and collects condensate from the flue gas. The siphon (200) is attached to the drain collecting part (4) to prevent the release of the flue gas from a condensate outlet (204) formed therein. The siphon (200) has a tubular body (210) being attached to the drain collecting part (4) and having a first portion (240) and a second portion (250). The first portion (240) has a condensate inlet (202). The second portion (250) has the condensate outlet (204) and an operation member (252). The tubular body (210) is configured such that, when the tubular body (210) is attached to the drain collecting part (4), the first portion (240) is connected to the drain collecting part (4) and can be at least partially located inside the housing (9), the second portion (250) can be at least partially located outside the housing (9), and the operation member (252) can be located outside the housing (9). The second portion (250) is detachably attached to the first portion (240).


Patent
Daikin Industries Ltd and Daikin | Date: 2017-05-31

A heat exchanger (10) comprises a front wall (20) and a back wall (30) to form a space (40) for a flue gas, and a front channel (60) and a back channel (70) formed in the front wall (20) and the back wall (30), respectively, in which a fluid is to flow. The heat exchanger (10) is configured such that the fluid in the front and back channels (60, 70) can exchange heat with the flue gas, in use. The entire back wall (30) extends along a first plane (P1). The front wall (20) includes a lower portion (22) and an upper portion (24). The lower portion (22) extends upwardly along the back wall (30). The upper portion (24) extends upwardly from the upper end of the lower portion (22) and extends outwardly away from the back wall (30) so as to form a combustion space (42) of a flammable gas between the upper portion (24) and the back wall (30). The heat exchanger (10) is further configured such that the volume flow rate and/or mass flow rate of the fluid in the front channel (60) is greater than the back channel (70), in use.


Patent
Daikin Industries Ltd and Daikin | Date: 2017-05-31

A heat exchanger (10) comprises a front wall (20) and a back wall (30) to form a space (40) for a flue gas such that a fluid flowing through a channel (60, 70) formed in the front wall (20) and back wall (30) can exchange heat with the flue gas, in use. The entire back wall (30) extends along a first plane (P1). The back wall (30) is provided with a back fin (120). The front wall (20) includes a lower portion (22) and an upper portion (24). The lower portion (22) extends upwardly along the back wall (30). The upper portion (24) extends upwardly from the upper end of the lower portion (22), extends outwardly away from the back wall (30) so as to form a combustion space (42) of a flammable gas between the upper portion (24) and the back wall (30), and is provided with a front fin (110). The front fin (110) and the back fin (120) are arranged symmetrically with respect to a virtual line (C2) along which the flammable gas is to be injected into the combustion space (42).


Patent
Daikin Industries Ltd and Daikin | Date: 2017-05-31

A heat exchanger (10) comprises walls (20, 30) to form a space (40) for a flue gas. At least one channel (60) formed in at least one of the walls (20) in which a fluid is to flow. The channel (60) includes at least two straight portions (60a, 60b) which are arranged in substantially parallel to each other and are connected in series. A stagnation prevention means (64) is arranged in at least one connecting area (61 a) of the straight portions (60a, 60b) where the two straight portions (60a, 60b) are connected and which is located on the most upstream side in the channel (60) with respect to a fluid flow.


Patent
Daikin Industries Ltd and Daikin | Date: 2017-05-31

A heat exchanger (10) comprises a front wall (20) and a back wall (30) to form a space (40) for a flue gas such that a fluid flowing through a channel (60, 70) formed in the front and back wall (20, 30) can exchange heat with the flue gas, in use. The front wall (20) includes a lower portion (22) and an upper portion (24). The lower portion (22) extends along the back wall (30). The upper portion (24) extends upwardly from the upper end of the lower portion (22) and extends outwardly away from the back wall (30) so as to form a combustion space (42) of a flammable gas between the upper portion (24) and the back wall (30). The length (L2) of the upper portion (24) along the longitudinal direction thereof is longer than the length (L1) of the lower portion (22) along the longitudinal direction thereof.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-SoU | Phase: ENERGY.2013.8.8.1 | Award Amount: 42.87M | Year: 2014

City-zen deals with the development of the city of the future. The project has three major goals, 1- to realize more effective collaboration models and a methodology for development of smart cities, 2- to connect with industry, and have them develop technology to the benefit of smart cities and 3- to showcase to society ambitious pilot projects. Main idea for this project is that after successful implementations in topics such as district heating, energy grids, local energy generation, energy efficiency for housing, now it is time for the next big step: integrated flexible open infrastructures. The approach taken is the set-up of stakeholder teams in the demonstrator cities, to accelerate the realization of energy-efficient city development. This effort is supported by technology teams including industrial parties. Workshops aiming at decreasing the gap between innovation and implementation will be organized and knowledge-disclosing material will be developed by specialized working groups in retrofitting, smart grids, and heating and cooling. This approach holds for both technology and process improvement. The demonstrators in Amsterdam and Grenoble include retrofitting 105000 m2 of housing to levels down to 53 kWh/m2, showing average savings of the order of 80%. Furthermore they include fully-functional smart grid development, electricity storage demonstrators, free cooling schemes and district heating efficiency improvements. The City-zen project recognizes the key position of citizens, so ample attention is paid to dissemination and education of this group. Serious gaming is included as part of the work, as well as a roadshow bringing the results of the project right at the doorsteps of decision makers in other cities. Extensive monitoring of all buildings and installations is included. All demonstrators together have an estimated impact of 59000 tonne/year CO2 reduction. Amsterdam and Grenoble CO2 reduction goals for 2050 are 80% reduction.


Patent
Daikin and Daikin Industries Ltd | Date: 2016-10-19

Air conditioner for conditioning a space (72) inside a building (70) comprising a heat source unit (30) having a heat exchanger unit (31) comprising a first heat exchanger (5) disposed in a first casing (2) and configured to exchange heat with a heat source and a compressor unit (32) comprising a compressor (37) disposed in a second casing (44) separate from the first casing and at least one indoor unit (50) having a second heat exchanger (53) configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit, wherein the heat exchanger unit (31) is disposed inside the building and fluidly communicated to the outside of the building.

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