[특허]Refrigeration unit comprising compartments at different temperatures

Thomson-Brandt

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Refrigeration unit comprising compartments at different temperatures

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25D-017/00
미국특허분류(USC)	062/333; 062/334; 062/442
출원번호	US-0281852 (1981-07-09)
우선권정보	FR-0015495 (1980-07-11)
발명자 / 주소	Quesnoit, Jacques
출원인 / 주소	Thomson-Brandt
대리인 / 주소	Cushman, Darby & Cushman
인용정보	피인용 횟수 : 18 인용 특허 : 3

초록

A refrigeration unit formed of compartments at different temperatures, separately regulated, comprising a refrigerant circuit equipped with a single motor-compressor, and composed of a primary circuit comprising a capillary tube and several evaporators, and a secondary circuit with a condenser and an evaporator, the condenser forming part of a heat exchanger with one of the primary circuit evaporators, and the evaporator, by a thermal valve effect, cooling the freezer compartment of the unit.

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1. A refrigeration unit comprising compartments at different temperatures, controlled by separate thermostatic devices, and cooled by a refrigerant circuit comprising a pressure-reducing capillary tube, and a single motor-compressor, characterized by the fact that it comprises a primary circuit of the type with expansion by capillary tube, with at least one evaporator functioning as an ordinary evaporator to cool at least one compartment at a higher temperature, known as the refrigerator compartment, and another evaporator forming part of a heat exchanger, to cool a compartment at a lower temperature, known as the freezer compartment, through a secondary circuit with a condenser and an evaporator, the condenser of which forms the heat exchanger with the second primary circuit evaporator, within which a refrigerant or cold-producing fluid circulates, and the evaporator of which is situated in the freezer compartment, in such a way as to produce a thermal valve effect, allowing heat to be transferred when the heat exchanger evaporator is at a lower temperature than the freezer compartment, and otherwise preventing any heat transfer, and comprises at least one device to block and release cold generation in the refrigerator compartment or compartments, the blocking state halting cooling of the refrigerator compartment or compartments, and thereby allowing cooling of the freezer compartment, while the releasing state allows cooling of the refrigerator compartment or compartments, halting cooling of the freezer compartment. 2. A unit as defined in claim 1, characterized by the fact that it comprises a refrigerator compartment, cooled by an evaporator, a primary circuit passing through a heat exchanger, and an accompanying secondary circuit, with a condenser and an evaporator, providing a thermal valve effect, and several refrigerator compartments, possibly at different temperatures, each cooled by an evaporator, containing a device to block and release generation of cold. 3. A unit as defined in claim 1, comprising two compartments, and in which the primary circuit of the refrigerant circuit comprises a motor-compressor, a condenser and a filter-dehydrator, connected in series, characterized by the fact that the said primary circuit further comprises, firstly, connected in series with the motor-compressor, condensor and filter-dehydrator, a main capillary tube, an auxiliary capillary tube, one chamber-shaped evaporator forming part of a heat exchanger with the condenser of a secondary circuit, comprising the said condenser and an evaporator, which cools the freezer compartment, and, connected in parallel with the auxiliary capillary tube, a second evaporator, which cools the refrigeration compartment, and secondly, a device to block and release generation of cold, in the form of an electro-valve, situated at the second primary circuit evaporator inlet. 4. A unit as defined in claim 1, comprising two compartments, and in which the primary circuit of the refrigerant circuit comprises a motor-compressor, a condensor, a filter-dehydrator and a capillary tube, connected in series, characterized by the fact that said primary circuit further comprises, first, connected in series with the motor-compressor, condenser, filter-dehydrator and capillary tube, one chamber-shaped evaporator, forming part of a heat exchanger with a condensor of a secondary circuit, comprising said condenser and an evaporator, which cools the freezer compartment, and a second evaporator which cools the refrigerator compartment, and, secondly, connected in a cul-de-sac position at the condenser outlet, a device to block and release generation of cold, in the form of a refrigerant trap chamber, equipped with a heating resistance. 5. A unit defined in either one of claims 3 or 4, comprising two compartments at different temperatures, separately regulated, characterized by the fact that it comprises an electrical regulation circuit to alternate generation of cold in the two compartments, giving priority to the freezer compartment, and made up of two parts, the first part comprising a closing thermostat, with constant resetting temperature, in the freezer compartment, connected in series with the motor-compressor to the terminals of a power supply, and the second part comprising a combination of a cold-generation blocking and release device connected in series with an opening thermostat in the refrigerator compartment, the combination being connected in parallel to the motor-compressor terminals. 6. A unit as defined in either one of claims 3 or 4, comprising two compartments at different temperatures, separately regulated, characterized by the fact that it comprises an electrical regulation circuit to alternate generation of cold in the two compartments, giving priority to the refrigeration compartment, and made up of two parts, the first part comprising a closing thermostat in the freezer compartment, connected in series with the motor-compressor to the terminals of a power supply, and the second part comprising a combination of the cold-generation blocking and release device connected in series with a closing thermostat in the refrigerator compartment, the combination being connected in parallel to the motor-compressor terminals. 7. A unit as defined in either of claims 3 or 4, containing two compartments at different temperatures, separately regulated, characterized by the fact that it comprises an electrical regulation circuit to alternate generation of cold in the two compartments, giving limited priority to the refrigerator compartment, and made up of three parts, the first part comprising a closing thermostat in the freezer compartment, connected in series with the motor-compressor to the terminals of a power supply, a second part comprising a combination of a closing thermostat in the refrigerator compartment, the cold-generation blocking and release device, and an auxiliary opening contact on the freezer compartment thermostat, these components being connected in series, and the combination being connected in parallel to the motor-compressor terminals, and the third part comprising a combination of the refrigerator compartment thermostat connected in series with a resistance to heat the freezer compartment thermostat bulb, the combination being connected in parallel to the power supply terminals. 8. A unit as defined in claim 7, in which the electrical regulation circuit comprises a switch, connected in parallel to the auxiliary contact terminals, and operation of which is concomitant with the start of continuous cold generation in the freezer compartment, for freezing purposes. 9. A unit as defined in either of claims 3 or 4, comprising two compartments at different temperatures, separately regulated, characterized by the fact that it comprises an electrical regulation circuit to alternate generation of cold in the two compartments, giving limited priority to the refrigerator compartment, and made up of two parts, the first part containing a closing thermostat in the freezer compartment, connected in series with the motor-compressor to the terminals of a power supply, and the second part comprising a combination of a closing thermostat in the refrigerator compartment, a cyclic device consisting of a switch, delayed-action operation of which is controlled by current circulating through the device, and a cold-generation blocking and release device, these components being connected in series, and the combination being connected in parallel to the motor-compressor terminals. 10. A unit as defined in claim 9, comprising a cyclic device consisting of a bimetallic strip switch with heating resistance, controlled by current circulating in the device. 11. A unit as defined in claim 9, in which the cyclic device comprises a switch activated by an electronic cyclic device. 12. A unit as defined in either of claims 1 and 2, in which the electrical regulation circuit to alternate cold generation in the compartments comprises an electronic device for separate regulation of compartment temperatures, intensified cold generation in the freezer compartment, readjustment of temporary thermal overloads, and switching-off of the refrigerator compartment alone. 13. A unit as defined in claim 1, comprising a heat exchanger, composed of an evaporator on the primary circuit and a condenser on the secondary circuit, each in tight contact with opposite sides of a heat-exchange plate. 14. A unit as defined in claim 13, in which the heat exchanger is composed of three metal plates sandwiched together, each outer plate being shaped in such a way as to form a circuit between it and the middle sheet for the refrigerant flow. 15. A unit as defined in either one of claims 13 and 14, in which at least one of the primary and secondary circuits is of the honeycomb type. 16. A unit as defined in either one of claims 13 and 14, in which at least one of the primary and secondary circuits in the heat exchanger comprises circulating channels extending over at least part of the heat exchanger surface. 17. A unit as defined in claim 13, comprising a heat exchanger in the form of a coil, consisting of a dual tube bent in an accordeon shape, and forming the primary and secondary refrigerant circuits. 18. A unit as defined in claim 13, comprising a heat exchanger in the form of a coil, consisting of two concentric tubes, bent in an accordeon shape, and forming the primary and secondary refrigerant circuits. 19. A unit as defined in claim 18, in which the concentric tubes are separated by fins.

이 특허에 인용된 특허 (3)

이 특허를 인용한 특허 피인용횟수: 18

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Refrigeration unit comprising compartments at different temperatures

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Refrigeration unit comprising compartments at different temperatures

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이 특허에 인용된 특허 (3)

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