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公开(公告)号：US11353245B2
公开(公告)日：2022-06-07
申请号：US16733908
申请日：2020-01-03
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Douglas Cole
Abstract: A cooling system is designed to operate in two different modes. Generally, in the first mode, when parallel compression is needed, certain valves are controlled to direct gaseous refrigerant from a tank to a compressor in the system and to direct refrigerant from low side heat exchangers towards other compressors. In this manner, a compressor in the system is transitioned to be generally a parallel compressor. In the second mode, when parallel compression is not needed, the valves are controlled to return the refrigerant flow back to normal.
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公开(公告)号：US20210215410A1
公开(公告)日：2021-07-15
申请号：US16743701
申请日：2020-01-15
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Shitong Zha , Douglas Cole
Abstract: A cooling system partially floods the low temperature low side heat exchangers (e.g., freezers) in the system. An accumulator is positioned between the low temperature low side heat exchangers and the low temperature compressor. The accumulator collects the refrigerant (both liquid and vapor) from the flooded low temperature low side heat exchangers. Refrigerant discharged by the low temperature compressor is fed through the accumulator so that heat can be transferred to the refrigerant collected in the accumulator. As a result, the temperature of the refrigerant discharged by the low temperature compressor drops before that refrigerant reaches the medium temperature compressor.
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公开(公告)号：US20190025859A1
公开(公告)日：2019-01-24
申请号：US15654385
申请日：2017-07-19
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Shitong Zha , Douglas Cole
Abstract: A flood prevention system includes a first load, a second load, a third load, a fourth load, a first compressor, a first temperature sensor, a second temperature sensor, and a controller. The first, second, third, and fourth loads are configured to use a refrigerant to remove heat from a first, second, third, and fourth space, respectively, proximate to the first, second, third, and fourth load, respectively. The first compressor is configured to compress the refrigerant from the fourth load. The first temperature sensor is configured to detect a first temperature of the refrigerant from the first load, the second load, and the third load. The second temperature sensor is configured to detect a second temperature of the refrigerant from the first load, the second load, the third load, and the compressor. The controller is configured to trigger an alarm in response to certain conditions.
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公开(公告)号：US20240230198A1
公开(公告)日：2024-07-11
申请号：US18617062
申请日：2024-03-26
Applicant: HEATCRAFT REFRIGERATION PRODUCTS LLC
Inventor： Douglas Cole , Steve Pfister
CPC classification number: F25B49/022 , F25B31/00 , F25B41/20 , F25B2400/0401 , F25B2400/077 , F25B2500/07 , F25B2500/08
Abstract: A refrigeration system includes a high-pressure side with a gas cooler configured, while the refrigeration system is powered by a main power supply and is operating to provide refrigeration, to cool refrigerant on the high-pressure side. The refrigeration system includes a low-pressure side with one or more evaporators. The refrigeration system includes an auxiliary compressor coupled to a backup power supply. An input of the auxiliary compressor is coupled to fluid conduit of the low-pressure side, and an output of the auxiliary compressor is coupled to fluid conduit of the high-pressure side. A controller is communicatively coupled to the auxiliary compressor. After determining that the main power supply is unavailable, the controller causes the auxiliary compressor to turn on to move refrigerant from the low-pressure side to the high-pressure side.
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公开(公告)号：US20240093921A1
公开(公告)日：2024-03-21
申请号：US18527078
申请日：2023-12-01
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Shitong Zha , Douglas Cole
CPC classification number: F25B41/20 , F25B1/10 , F25B5/02 , F25B43/006 , F25B49/02 , F25B2400/0409 , F25B2400/051 , F25B2400/072 , F25B2400/13 , F25B2600/2501 , F25B2700/04
Abstract: A cooling system partially floods the low temperature low side heat exchangers (e.g., freezers) in the system. An accumulator is positioned between the low temperature low side heat exchangers and the low temperature compressor. The accumulator collects the refrigerant (both liquid and vapor) from the flooded low temperature low side heat exchangers. Refrigerant discharged by the low temperature compressor is fed through the accumulator so that heat can be transferred to the refrigerant collected in the accumulator. As a result, the temperature of the refrigerant discharged by the low temperature compressor drops before that refrigerant reaches the medium temperature compressor.
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Patent Agency Ranking
公开(公告)号：US12203687B2
公开(公告)日：2025-01-21
申请号：US18527078
申请日：2023-12-01
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Shitong Zha , Douglas Cole
Abstract: A cooling system partially floods the low temperature low side heat exchangers (e.g., freezers) in the system. An accumulator is positioned between the low temperature low side heat exchangers and the low temperature compressor. The accumulator collects the refrigerant (both liquid and vapor) from the flooded low temperature low side heat exchangers. Refrigerant discharged by the low temperature compressor is fed through the accumulator so that heat can be transferred to the refrigerant collected in the accumulator. As a result, the temperature of the refrigerant discharged by the low temperature compressor drops before that refrigerant reaches the medium temperature compressor.
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公开(公告)号：US11982480B2
公开(公告)日：2024-05-14
申请号：US17884243
申请日：2022-08-09
Applicant: HEATCRAFT REFRIGERATION PRODUCTS LLC
Inventor： Douglas Cole , Steve Pfister
CPC classification number: F25B49/022 , F25B31/00 , F25B41/20 , F25B2400/0401 , F25B2400/077 , F25B2500/07 , F25B2500/08
Abstract: A refrigeration system includes a high-pressure side with a gas cooler configured, while the refrigeration system is powered by a main power supply and is operating to provide refrigeration, to cool refrigerant on the high-pressure side. The refrigeration system includes a low-pressure side with one or more evaporators. The refrigeration system includes an auxiliary compressor coupled to a backup power supply. An input of the auxiliary compressor is coupled to fluid conduit of the low-pressure side, and an output of the auxiliary compressor is coupled to fluid conduit of the high-pressure side. A controller is communicatively coupled to the auxiliary compressor. After determining that the main power supply is unavailable, the controller causes the auxiliary compressor to turn on to move refrigerant from the low-pressure side to the high-pressure side.
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公开(公告)号：US20210372676A1
公开(公告)日：2021-12-02
申请号：US17403129
申请日：2021-08-16
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Douglas Cole
Abstract: An apparatus includes a conduit coupled to a suction header that is configured to receive a refrigerant and an oil separator that is configured to separate an oil from the refrigerant received from a compressor. During a first mode of operation, the conduit is configured to remove excess oil from the refrigerant that has collected at the suction header. During a second mode of operation, the oil separator is configured to direct to the conduit the oil separated from the refrigerant received from the compressor. The conduit is configured to direct to an oil reservoir the oil from the oil separator and the excess oil removed from the refrigerant.
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公开(公告)号：US11143444B2
公开(公告)日：2021-10-12
申请号：US16244804
申请日：2019-01-10
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Douglas Cole
Abstract: An apparatus includes a suction header, a drain leg, an oil separator, and an oil reservoir. The suction header is configured to receive a refrigerant and the drain leg is coupled to the suction header. The oil separator is configured to separate an oil from the refrigerant from a compressor. During a first mode of operation, the drain leg is configured to collect an oil from the refrigerant from a compressor at the suction header. During a second mode of operation, the oil separator is configured to direct the oil separated from the refrigerant from the compressor through the drain leg and to the oil reservoir.
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公开(公告)号：US20200224944A1
公开(公告)日：2020-07-16
申请号：US16244804
申请日：2019-01-10
Applicant: Heatcraft Refrigeration Products LLC
Inventor： Douglas Cole
Abstract: An apparatus includes a suction header, a drain leg, an oil separator, and an oil reservoir. The suction header is configured to receive a refrigerant and the drain leg is coupled to the suction header. The oil separator is configured to separate an oil from the refrigerant from a compressor. During a first mode of operation, the drain leg is configured to collect an oil from the refrigerant from a compressor at the suction header. During a second mode of operation, the oil separator is configured to direct the oil separated from the refrigerant from the compressor through the drain leg and to the oil reservoir.
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