IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0847797
(2004-05-18)
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발명자
/ 주소 |
- Bischel, Kevin
- Moshier, Kenneth
- Singletary, Martin
- Whitney, Timothy
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출원인 / 주소 |
- Carrier Commercial Refrigeration, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
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A refrigeration system both cools and heats frozen dessert mix in at least two hoppers and at least two freezing cylinders. A liquid line solenoid valve at the inlet of each of the hoppers and the freezing cylinders controls the flow of refrigerant from the condenser. A hot gas solenoid valve at the
A refrigeration system both cools and heats frozen dessert mix in at least two hoppers and at least two freezing cylinders. A liquid line solenoid valve at the inlet of each of the hoppers and the freezing cylinders controls the flow of refrigerant from the condenser. A hot gas solenoid valve at the inlet of each of the hoppers and the freezing cylinders controls the flow of hot refrigerant from the compressor. The system further includes a hot gas bypass valve that is opened when only the hoppers are being cooled to provide additional compressor load. An EPR valve proximate to the hopper discharges varies the temperature of the refrigerant exchanging heat with the mix in the hoppers. A CPR valve controls the inlet pressure of the compressor by reducing the amount of hot refrigerant flowing into the compressor suction. A TREV valve injects liquid refrigerant to the compressor suction to control excessive compressor discharge during the cool cycle.
대표청구항
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1. A refrigeration system comprising:a compression device to compress a refrigerant to a high pressure, said compression device including a compressor suction and a compressor discharge; a heat rejecting heat exchanger for cooling said refrigerant; a first cylinder expansion device for expanding a f
1. A refrigeration system comprising:a compression device to compress a refrigerant to a high pressure, said compression device including a compressor suction and a compressor discharge; a heat rejecting heat exchanger for cooling said refrigerant; a first cylinder expansion device for expanding a first portion of said refrigerant to a first cylinder low pressure; a first cylinder heat exchanger, said first portion of said refrigerant from said first cylinder expansion device exchanging heat with a first mix in said first cylinder heat exchanger; a second cylinder expansion device for expanding a second portion of said refrigerant to a second cylinder low pressure; a second cylinder heat exchanger, said second portion of said refrigerant from said second cylinder expansion device exchanging heat with a second mix in said second cylinder heat exchanger; a hopper expansion device for expanding a third portion of said refrigerant to a hopper low pressure; a first hopper heat exchanger, a portion of said third portion of said refrigerant from said hopper expansion device exchanging heat with said first mix in said first hopper heat exchanger; and a second hopper heat exchanger, a remainder of said third portion of said refrigerant from said hopper expansion device exchanging heat with said second mix in said second hopper heat exchanger. 2. The system as recited in claim 1 wherein said hopper expansion device comprises a first hopper expansion device and a second hopper expansion device, and said first hopper expansion device expands said portion of said third portion of said refrigerant entering said first hopper heat exchanger and said second hopper expansion device expands said remainder of said third portion of said refrigerant entering said first hopper heat exchanger.3. The system as recited in claim 2 further comprising a first hopper liquid line solenoid valve positioned between said first hopper expansion device and said heat rejecting heat exchanger, a first cylinder liquid line solenoid valve positioned between said first cylinder expansion device and said heat rejecting heat exchanger, a second hopper liquid line solenoid valve positioned between said second hopper expansion device and said heat rejecting heat exchanger, and a second cylinder liquid line solenoid valve positioned between said second cylinder expansion device and said heat rejecting heat exchanger.4. The system as recited in claim 3 further comprising a first hopper hot gas solenoid valve positioned between said compressor discharge and said first hopper heat exchanger, a first cylinder hot gas solenoid valve positioned between said compressor discharge and said first cylinder heat exchanger, a second hopper hot gas solenoid valve positioned between said compressor discharge and said second hopper heat exchanger, and a second cylinder hot gas solenoid valve positioned between said compressor discharge and said second cylinder heat exchanger.5. The system as recited in claim 4 wherein said first hopper liquid line solenoid valve, said first cylinder liquid line solenoid valve, said second hopper liquid line solenoid valve, and said second cylinder liquid line solenoid valve are open and said first hopper hot gas solenoid valve, said first cylinder hot gas solenoid valve, said second hopper hot gas solenoid valve, and said second cylinder hot gas solenoid valve are closed to allow refrigerant from said heat rejecting heat exchanger to cool said first mix in said first hopper heat exchanger and said first cylinder heat exchanger and to cool said second mix in said second hopper heat exchanger and said second cylinder heat exchanger.6. The system as recited in claim 4 wherein said first hopper liquid line solenoid valve, said first cylinder liquid line solenoid valve, said second hopper liquid line solenoid valve, and said second cylinder liquid line solenoid valve are closed and said first hopper hot gas solenoid valve, said first cylinder hot gas solenoid valve, said second hopper hot gas solenoid valve, and said second cylinder hot gas solenoid valve are open to allow refrigerant from said compressor discharge of said compressor to heat first mix in said first hopper heat exchanger and said first cylinder heat exchanger and to heat said second mix in said second hopper heat exchanger and said second cylinder heat exchanger.7. The system as recited in claim 4 further including a hot gas bypass valve positioned between said compressor discharge and said compressor suction, and said hot gas bypass valve is opened to increase refrigerant flow from said compressor discharge to said compressor suction when said first hopper liquid line solenoid valve and second hopper liquid line solenoid valve are opened, and said first cylinder liquid line solenoid valve, said second cylinder liquid line solenoid valve, said first hopper hot gas solenoid valve, second hopper hot gas solenoid valves, said first cylinder hot gas solenoid valve and said second cylinder hot gas solenoid valves are closed.8. The system as recited in claim 7 further including a hot gas bypass solenoid valve in series with said hot gas bypass valve and activated in parallel with said first hopper liquid line solenoid valve and said second hopper liquid line solenoid valve, and said hot gas bypass solenoid valve is opened when said first hopper liquid line solenoid valve and said second hopper liquid line solenoid valve are opened.9. The system as recited in claim 4 further including a first suction solenoid valve positioned proximate to a first cylinder discharge of said first cylinder heat exchanger and a second suction solenoid valve positioned proximate to a second cylinder discharge of said second cylinder heat exchanger, and said first suction solenoid valve and said second suction solenoid valve are closed when said system is inactive to prevent said refrigerant from migrating towards said first cylinder heat exchanger and said second cylinder heat exchanger.10. The system as recited in claim 4 further including a first suction solenoid valve positioned proximate to a first cylinder discharge of said first cylinder heat exchanger and a second suction solenoid valve positioned proximate to a second cylinder discharge of said second cylinder heat exchanger, and said first suction solenoid valve, said second suction solenoid valve, said first hopper hot gas solenoid valve, and said second hopper hot gas solenoid valve are open are open simultaneously, and said first cylinder hot gas solenoid valve and said second cylinder hot gas solenoid valve are opened after said first suction solenoid valve and said second suction solenoid valve are opened.11. The system as recited in claim 1 further including a first EPR valve positioned proximate to a first hopper discharge of said first hopper heat exchanger and a second ERP valve positioned proximate to a second hopper discharge of said second hopper heat exchanger, and said first EPR valve and said second EPR valve are closed to increase a pressure of said refrigerant in said first hopper heat exchanger and said second hopper heat exchanger and to increase a temperature of said refrigerant in said first hopper heat exchanger and said hopper heat exchanger.12. The system as recited in claim 1 further including a CPR valve positioned proximate to said compressor suction, and said CPR valve is restricted to reduce a suction pressure of said refrigerant flowing into said compressor suction and to reduce a discharge pressure of said refrigerant exiting said compressor discharge.13. The system as recited in claim 1 further including a TREV valve positioned between an outlet of said heat rejecting heat exchanger and said compressor suction, and said TREV valve opens to allow said refrigerant from said outlet of said heat rejecting heat exchanger to enter said compressor suction when said TREV sensor senses that a compressor discharge temperature is greater than a threshold value.14. The system as recited in claim 13 further including a CPR valve positioned proximate to said compressor suction to reduce a discharge pressure of said refrigerant exiting said compressor discharge, and said TREV valve injects said refrigerant at a location between said CPR valve and said compressor suction.15. The system as recited in claim 1 wherein said first hopper heat exchanger, said first cylinder heat exchanger, said second hopper heat exchanger, and said second cylinder heat exchanger are a heat accepting heat exchanger when the system operates in a cooling mode and said first hopper heat exchanger, said first cylinder heat exchanger, said second hopper heat exchanger, and said second cylinder heat exchanger are a heat rejecting heat exchanger when the system operates in a heating mode.16. The system as recited in claim 15 wherein said refrigerant in said first hopper heat exchanger, said first cylinder heat exchanger, said second hopper heat exchanger, and said second cylinder heat exchanger cools said first mix and said second mix when the system operates in said cooling mode, and said refrigerant in said first hopper heat exchanger, said first cylinder heat exchanger, said second hopper heat exchanger, and said second cylinder heat exchanger heats said first mix and said second mix when the system operates in said heating mode.17. The system as recited in claim 1 wherein said first cylinder expansion device and said second cylinder expansion device are an AXV expansion valve.18. The system as recited in claim 1 wherein said hopper expansion device is a TXV expansion device.
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