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Found results for
 patents
1.
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Method for Defrosting a Heat Pump and Heat Pump Comprising a Defrost System
| Document Number |
03244781 |
| Status |
Pending |
| Filing Date |
2024-06-28 |
| Open to Public Date |
2025-06-06 |
| Owner |
FENAGY A/S (Denmark)
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| Inventor |
- Andersen, Henrik
- Rasmussen, Jonas Lund
- Alvandifar, Negar
- Christensen, Kim Gardo
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Abstract
Method for defrosting an air source heat pump comprising a plurality of outdoor evaporators each comprising a number of coils each comprising fins and pipes. The heat pump comprises a defrost system that applies a defrosting medium to provide thermal energy to defrost the coils. The method comprising: a) by using at least one temperature sensor measuring at least one temperature of at least one of the coils of at least one of the outdoor evaporators; b) activating the defrost system and hereby performing several defrost processes each having a duration separated by a pause without defrosting, when the at least one temperature is below a predefined temperature value, d) by using at least one temperature sensor measuring at least one outdoor temperature, the method comprises the following steps: determine a maximum allowable pause time in dependency of the at least one outdoor temperature.
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2.
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CO2 Heat Pump System or CO2 Refrigeration System Comprising an Ejector Assembly and Method for Controlling an Ejector Assembly of a CO2 Heat Pump System or a CO2 Refrigeration System
| Application Number |
18376936 |
| Status |
Pending |
| Filing Date |
2023-10-05 |
| First Publication Date |
2024-04-11 |
| Owner |
FENAGY A/S (Denmark)
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| Inventor |
- Christensen, Kim Gardø
- Nielsen, Mads Holst
- Rasmussen, Jonas Lund
- Nielsen, Jacob Skaarup
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Abstract
A CO2 based system, such as a heat pump system or a refrigeration system, is disclosed. The system comprises a plurality of ejectors arranged in parallel. Each of the ejectors comprises a motive port and a suction port. Each of the ejectors has a fixed geometry. A first actuated ball valve is arranged in front of the motive port. A second actuated ball valve is arranged in front of the suction port. The system comprises a control unit arranged and configured to control the activity of the ball valves on the basis of one or more predefined criteria.
IPC Classes ?
- F25B 9/08 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
- F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
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3.
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CO2 HEAT PUMP SYSTEM OR CO2 REFRIGERATION SYSTEM COMPRISING AN EJECTOR ASSEMBLY AND METHOD FOR CONTROLLING AN EJECTOR ASSEMBLY OF A CO2 HEAT PUMP SYSTEM OR A CO2 REFRIGERATION SYSTEM
| Document Number |
03215349 |
| Status |
Pending |
| Filing Date |
2023-10-04 |
| Open to Public Date |
2024-04-07 |
| Owner |
FENAGY A/S (Denmark)
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| Inventor |
- Christensen, Kim Gardo
- Nielsen, Mads Holst
- Rasmussen, Jonas Lund
- Nielsen, Jacob Skaarup
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Abstract
A CO2 based system (20) being a heat pump system or a refrigera-tion system is disclosed. The system (20) comprises a plurality of ejec-tors (2, 2', 2", 2") are arranged in parallel. Each of the ejectors (2, 2', 2", 2'") comprises a motive port (8) and a suction port (20). Each of the ejectors (2, 2', 2", 2'") has a fixed geometry. A first actuated ball valve (4, 4', 4", 4") is arranged in front of the motive port (8). A sec-ond actuated ball valve (6, 6', 6", 6") is arranged in front of the suction port (10). The system (20) comprises a control unit (12) arranged and configured to control the activity of the ball valves (4, 4', 4", 4"',6", 6'") on the basis of one or more predefined criteria.
IPC Classes ?
- F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
- F25B 9/08 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
- F25B 29/00 - Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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