US20080190123A1 - Refrigerator Having Multi-Cycle Refrigeration System And Control Method Thereof - Google Patents

Refrigerator Having Multi-Cycle Refrigeration System And Control Method Thereof Download PDF

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Publication number
US20080190123A1
US20080190123A1 US11/568,432 US56843206A US2008190123A1 US 20080190123 A1 US20080190123 A1 US 20080190123A1 US 56843206 A US56843206 A US 56843206A US 2008190123 A1 US2008190123 A1 US 2008190123A1
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Prior art keywords
refrigerating
freezing
cycle
evaporator
temperature
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Abandoned
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US11/568,432
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English (en)
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Yanquan Li
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Hisense Group Co Ltd
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Hisense Group Co Ltd
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Priority claimed from CN 200410035589 external-priority patent/CN1598447A/zh
Priority claimed from CN 200410035588 external-priority patent/CN1598446A/zh
Application filed by Hisense Group Co Ltd filed Critical Hisense Group Co Ltd
Assigned to HISENSE GROUP CO. LTD. reassignment HISENSE GROUP CO. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LI, YANQUAN
Publication of US20080190123A1 publication Critical patent/US20080190123A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators

Definitions

  • the present invention relates to a refrigerator, in particular, it relates to a refrigerator having a compression device provided with several refrigeration loops arranged in series or in parallel.
  • Prior Art I The refrigerating and freezing chamber of common compression refrigeration system, of which the cycle refrigeration loop is a single system.
  • the outlet of compressor 1 is connected to condenser 2
  • the downstream of condenser 2 is connected to throttle capillary 3
  • the downstream of capillary 3 is connected to freezing evaporator 4 then to refrigerating evaporator 5
  • refrigerating evaporator 5 then to freezing evaporator 4
  • the operation principle of Prior Art I is as follows: The operation of compressor 1 is controlled by a temperature sensor provided in the refrigerating chamber. When the temperature of the refrigerating chamber is higher than the predefined startup temperature, the compressor begins to operate, and the temperatures of the two chambers drop simultaneously; when the temperature of the refrigerating chamber is lower than the predefined halt temperature, the compressor ceases to operate and the temperatures of the two chambers rise simultaneously. When the temperature of the refrigerating chamber rises back to a point which is higher than the predefined startup temperature, the compressor begins to operate again, and this process repeats to keep the temperatures of the refrigerating chamber within a certain temperature range.
  • the system possesses a simple structure, and its operation is controlled by the temperature of the refrigerating chamber, and the temperature of the freezing chamber cannot be controlled independently and it varies with the change in the temperature of the surrounding environment.
  • the surrounding temperature rises during summertime, and the temperature of the freezing chamber is too low, it will consume more cooling capacity; and during wintertime the surrounding temperature is so low that the operation frequency required by refrigerating chamber is low while the temperature of the freezing chamber is too high, and the common solution is to add auxiliary heating device, which compels a cycle start up to reduce the temperature of freezing chamber. Obviously, the auxiliary heating device consumes extra energy.
  • Prior Art II Traditional dual system topology, generally bases on the above-mentioned topology structure that connects the refrigerating before the freezing, having the input port of the magnet valve 31 connected to the end of condenser 2 .
  • the magnet valve 31 is provided with two output ports, one of which is connected to the refrigerating throttle capillary 3 , and the other is connected to the auxiliary freezing throttle capillary 34 , the end of capillary 34 is connected to the output port of refrigerating evaporator 5 and the input port of freezing evaporator 4 , and the end of freezing evaporator 4 is connected to the gas returning end of compressor 1 through the gas returning pipe 6 .
  • the operation principle of Prior Art II is as follows: The operation of compressor 1 is controlled by the temperature sensor provided in the refrigerating chamber. When the temperature of the refrigerating chamber is higher than the predefined startup temperature, the compressor begins to operate and the temperatures of the two chambers drop simultaneously; when the temperature of the refrigerating chamber is lower than the predefined halt temperature, the compressor ceases to operate and the temperatures of the two chambers rise simultaneously.
  • the auxiliary freezing cycle will be started to reduce the temperature of freezing chamber independently.
  • the dual system excludes the auxiliary heating device, and when the surrounding temperature is low, energy will be saved.
  • the advantages of the refrigerating and freezing chamber of dual system lie in that the refrigerating chamber can be closed down, and the freezing chamber can be utilized independently. Meanwhile, the system possesses large cooling capacity, because freezing chamber has independent capillary throttle control device. This art has been widely applied.
  • Prior Art III In order to close down the freezing chamber and utilize the refrigerating chamber independently, a parallel topology structure has been proposed by some prior inventions.
  • the topology structure is characterized in that the refrigerating and freezing adopt two independent throttle and evaporating refrigeration loops.
  • the topology structure is simple, and can operate the refrigerating and freezing refrigeration loop independently thereby save energy.
  • evaporation pressure and temperature deviates largely from the optimum value, which causes the system efficiency to decrease, and causes energy consumption to rise.
  • the new topology structure refrigeration system of the said “composite multi-cycle” successfully solves the contradiction existing between refrigeration efficiency and the function of stopping freezing, and it can optimize the system efficiency in the normal operational state, in which the refrigerating chamber and the freezing chamber are used simultaneously and reduce the power consumption effectively. Meanwhile, it can further realize the function of closing the freezing chamber and converting the refrigerating chamber into a freezing chamber of the different classes.
  • the said “composite”, means that “multiple” refrigeration system loop and chambers are “independently” controlled.
  • the refrigerator having multi-cycle refrigeration system is implemented as follows: it comprises a main CPU, a temperature sensor and a refrigeration cycle loop, wherein the refrigeration cycle loop is composed of a compressor, a condenser, a main capillary, a freezing evaporator, a refrigerating evaporator and a gas returning pipe which are connected in series, and a magnet valve having two output ports is connected to the downstream of the condenser, and one of the output ports is connected to the main capillary and the other is connected to an auxiliary refrigerating cycle branch.
  • the solution can be realized in details by following structures:
  • the freezing evaporator is connected before the refrigerating evaporator;
  • the auxiliary refrigerating cycle branch comprises auxiliary refrigerating capillary, which is in parallel with the main capillary and the freezing evaporator that are connected in series, and which is connected between the output port of the magnet valve and the input port of the refrigerating evaporator.
  • auxiliary refrigerating cycle branch comprises auxiliary capillary and auxiliary refrigerating evaporator connected thereof in series, and the auxiliary refrigerating cycle branch is in parallel with the main capillary and the freezing evaporator that are connected in series, and which is connected between the output port of the magnet valve and the input port of the refrigerating evaporator.
  • auxiliary refrigerating cycle branch comprises auxiliary capillary and auxiliary refrigerating evaporator connected thereof in series, and the auxiliary refrigerating cycle branch is in parallel with the main capillary, the freezing evaporator and the refrigerating evaporator that are connected in series, and which is connected between the output port of the magnet valve and the output port of the refrigerating evaporator.
  • auxiliary refrigerating cycle branch comprises auxiliary capillary and auxiliary refrigerating evaporator connected thereof in series, and the auxiliary refrigerating cycle branch is in parallel with main capillary, refrigerating evaporator and freezing evaporator that are connected in series, and which is connected between the output port of the magnet valve and the output port of the freezing evaporator.
  • the magnet valve is a two-position three-way valve, which is connected to condenser, main capillary and auxiliary refrigerating capillary respectively.
  • magnet valve is two magnet valves in parallel installation, one of which is connected between the condenser and the main capillary, and the other is connected between the condenser and the auxiliary refrigerating capillary.
  • control method according to the present invention comprises steps:
  • the refrigerator is electrified and initialized, main CPU tests whether “Freezing Off” is activated, if it is activated, then the magnet valve switches off the freezing cycle loop and switches on the auxiliary refrigerating cycle loop simultaneously, when the predefined temperature of refrigerating chamber is reached, it returns to the beginning to repeat the test; if “Freezing Off” is not activated, the magnet valve switches on freezing cycle loop and switches off auxiliary refrigerating cycle loop, and it proceeds to Step II;
  • FIG. 1 is the structural block diagram according to the prior art I
  • FIG. 2 is the structural block diagram according to the prior art II
  • FIG. 3 is the structural block diagram according to the prior art III
  • FIG. 4 is the structural block diagram of the embodiment 1 according to the present invention.
  • FIG. 5 is the structural block diagram of the embodiment 2 according to the present invention.
  • FIG. 6 is the structural block diagram of the embodiment 3 according to the present invention.
  • FIG. 7 is the structural block diagram of the embodiment 4 according to the present invention.
  • FIG. 8 is the structural block diagram of the embodiment 5 according to the present invention.
  • the present embodiment provides a typical system of topology structure according to the present invention, which comprises a main CPU, a temperature sensor and a refrigeration cycle loop.
  • the refrigeration cycle loop is composed of a compressor 1 , a condenser 2 , a main capillary 3 , a freezing evaporator 41 , a refrigerating evaporator 51 and a gas returning pipe 6 which are in turn connected in series accordingly, and the downstream of the condenser 2 is connected in series to a magnet valve 31 having two output ports, one of which is connected to the main capillary 3 , and the other is connected to the auxiliary refrigerating cycle branch,
  • the auxiliary refrigerating cycle branch comprises auxiliary refrigerating capillary 32 , which is in parallel with the main capillary 3 and the freezing evaporator 41 that are themselves connected in series, and the auxiliary refrigerating capillary 32 is connected between the output port of the magnet valve 31 and the input port of the refrigerating evaporator 51
  • the difference of the Embodiment 1 lies in that, in the loop, the freezing evaporator 41 is connected before refrigerating evaporator 51 .
  • the refrigerant cycle system of the present invention flows in the following manner:
  • the compressor begins to operate, the refrigerant is compressed into high-pressure gas by compressor 1 and is discharged, and the high-pressure gas passes through magnet valve 31 after being condensed by the condenser 2 .
  • the temperature sensor detects the temperatures of the freezing chamber and that of the refrigerating chamber, when the freezing chamber and the refrigerating chamber require to operate simultaneously, the CPU controls the magnet valve 31 to switch on freezing and switch off refrigerating, the refrigerant is compressed into high-pressure gas by compressor 1 and is discharged, and the high-pressure gas passes through magnet valve 31 after being condensed by condenser 2 .
  • the refrigerant is throttled by the main capillary 3 , and becomes low-pressure low-temperature liquid.
  • the liquid partially evaporates into low-temperature gas in the freezing evaporator 41 to absorb the heat energy of freezing chamber F.
  • the remaining liquid which does not evaporate completely, flows into the refrigerating evaporator 51 and continues to evaporate, and to absorb the heat energy of the refrigerating chamber R, and finally evaporates into low-temperature gas completely, which is then inhaled into compressor 1 after being heated by the gas returning pipe 6 , and thereby forms the cycle; here refrigerating and freezing are involved in the cycle simultaneously, which can be utilized as refrigerator of common practice.
  • the system load is the load of refrigerating and freezing in series, which is constant, therefore, the refrigeration system cycle efficiency can be adjusted to an optimum status under the target surrounding temperature, and effectively enhance energy conversion rate.
  • the CPU controls the magnet valve 31 to switch on freezing and auxiliary refrigerating cycle, the refrigerant is compressed into high-pressure gas by compressor 1 and is discharged, and the high-pressure gas passes through the magnet valve 31 after being condensed by condenser 2 .
  • the refrigerant is throttled by the main capillary 3 , and becomes low-pressure low-temperature liquid.
  • the liquid partially evaporates into low-temperature gas in the freezing evaporator 41 to absorb the heat energy of the freezing chamber F.
  • the remaining liquid which does not evaporate completely, flows into the refrigerating evaporator 51 and continues to evaporate to absorb the heat energy of refrigerating chamber R.
  • the refrigerant is throttled by throttle capillary 32 of the auxiliary refrigerating cycle, and becomes low-pressure low-temperature liquid.
  • the liquid evaporates into low-temperature gas in the refrigerating evaporator 51 to absorb the heat energy of refrigerating chamber R.
  • the liquid finally evaporates into low-temperature gas completely, which is inhaled into compressor 1 after being heated by gas returning pipe 6 , and thereby forms the cycle; here the temperature of refrigerating chamber can be decreased, which realizes the function of fast cooling for one aspect, and realizes the function of converting the refrigerating chamber into freezing chamber for another aspect. It is particularly suitable for storing large amount of frozen food periodically.
  • the freezing temperature of the refrigerating chamber can be regulated by adjusting the duration of switch on and off of the magnet valve 31 , and this is a very practical function, which is also very suitable for the use of Chinese people.
  • the CPU controls the magnet valve 31 to switch off the freezing and switch on the auxiliary refrigerating cycle, the refrigerant is throttled by the throttle capillary 32 of auxiliary refrigerating cycle, and becomes low-pressure low-temperature liquid.
  • the liquid evaporates into low-temperature gas in the refrigerating evaporator 51 to absorb the heat energy of the refrigerating chamber R.
  • the liquid finally evaporates into low-temperature gas completely, which is inhaled into compressor 1 after being heated by gas returning pipe 6 , and thereby forms cycle; here the freezing evaporator is not involved in refrigeration cycle, and refrigerating generates all the cooling capacity, which can be utilized as refrigerating chamber, to largely reduce the electricity consumption and save energy. This is a very practical function.
  • the magnet valve 31 according to the present invention is provided as a two-position three-way valve.
  • the refrigerating evaporator 51 and the freezing evaporator 41 comprise single evaporator and a combination of several evaporators in series for chambers with same or different temperatures.
  • the typical matching strategy of the refrigerator according to the present invention is as follows:
  • the main operation control of the compressor adopts refrigerating temperature sensor, and system matching principle is, under the target surrounding temperature (for example, 25 ⁇ , or other temperatures, according to the average surrounding temperature of the target market or the climate type the refrigerator is designed for), to reach the refrigerating target temperature (for example, 5 ⁇ ) and the freezing target temperature (for example, ⁇ 18 ⁇ ) simultaneously, and to further enhance the cycle system efficiency of the refrigerant and enable the refrigerator to reach the optimal energy saving target under the common target surrounding temperature when the refrigerating and the freezing are operating simultaneously.
  • target surrounding temperature for example, 25 ⁇ , or other temperatures, according to the average surrounding temperature of the target market or the climate type the refrigerator is designed for
  • the refrigerating target temperature for example, 5 ⁇
  • the freezing target temperature for example, ⁇ 18 ⁇
  • the typical temperature control strategy of the refrigerator according to the present invention is as follows: As surrounding temperature rises or refrigerating load changes, the refrigerating temperature rises to a point which is higher than a certain level (the refrigerating target temperature+X), then the magnet valve of the auxiliary refrigerating cycle loop will be switched on to reduce the temperature of the refrigerating chamber solely and reach the refrigerating target temperature. When freezing temperature drops to a point which is lower than a certain level (the freezing target temperature ⁇ Y), the magnet valve of the freezing will be switched off to cut off the freezing cycle loop and reduce the energy loss.
  • X is between 1 ⁇ 3 ⁇
  • Y is between 2 ⁇ 5 ⁇ .
  • the typical temperature control program of the refrigerator according to the present invention is as follows:
  • Program resets to START, tests whether “Freezing Off” is activated, if it is activated, then the magnet valve switches off the freezing cycle loop and switches on the auxiliary refrigerating cycle loop. It is a “Refrigerating” single cycle loop, which operates according to the predefined temperature of the “Refrigerating Chamber”, and the scope of the predefined temperature can be large.
  • the magnet valve switches on the freezing cycle loop and switches off the auxiliary refrigerating cycle loop.
  • the temperatures of refrigerating chamber and freezing chamber are tested, and when the temperature of the refrigerating chamber or the temperature of the freezing chamber is higher than the predefined startup temperature, compressor is initiated. If the temperature of the freezing chamber is too low (freezing target temperature ⁇ Y) while the temperature of the refrigerating chamber is higher than the predefined startup temperature, the magnet valve switches off the freezing cycle loop and switches on the auxiliary refrigerating cycle loop to reduce the temperature of the refrigerating chamber.
  • the difference between the present embodiment and the embodiment 1 lies in that, the magnet valve 31 of the present embodiment is two magnet valves in parallel installation, one of which is connected between the condenser 2 and the main capillary 3 , and the other is connected between the condenser 2 and the auxiliary refrigerating capillary 32 , these two valves control respectively the freezing cycle loop and the auxiliary refrigerating cycle branch, and the other parts of embodiment 2 are the same as that of the embodiment 1.
  • the difference between the present embodiment and the above-mentioned embodiments lies in that, the auxiliary refrigerating evaporator 52 is connected to the downstream of the auxiliary refrigerating capillary 32 in series, in such a way, the auxiliary refrigerating cycle branch comprises the auxiliary capillary 32 and the auxiliary refrigerating evaporator 52 connected thereof, the auxiliary refrigerating cycle branch is in parallel with the main capillary 3 and freezing evaporator 41 that are themselves connected in series, and is connected between the output port of the magnet valve 31 and the output port of the freezing evaporator 41 .
  • the present embodiment further reduces the temperature of the refrigerating chamber to convert the refrigerating chamber to icebox, one-star or two-star freezing chamber, and the predefined temperature scope can be large.
  • the present embodiment provides a typical system topology structure according to the present invention, which is completely different from the traditional dual system.
  • the difference between the present embodiment and embodiment 3 lies in that, the auxiliary refrigerating cycle branch is in parallel with the main capillary 3 , freezing evaporator 41 and refrigerating evaporator 51 orderly that are themselves connected in series, and is connected between the output port of the magnet valve 31 and the output port of the refrigerating evaporator 51 , i.e. the end of the auxiliary refrigerating cycle branch is connected to the input port of the gas returning pipe.
  • the refrigerant cycle system of the present invention flows in the following manner:
  • the control process of the refrigerator according to the present invention is that, after the refrigerator is electrified and initialized, the temperature sensor begins to test the temperatures of the chambers, and when refrigerating chamber and freezing chamber require to begin operating simultaneously, the main CPU controls the magnet valve 31 to switch on the main cycle and switch off the auxiliary refrigerating cycle, and refrigerant cycle is the same as common refrigerator system in that the freezing chamber and the refrigerating chamber refrigerate simultaneously.
  • the refrigerant is compressed into high-pressure gas by compressor 1 and is discharged, and the high-pressure gas passes through magnet valve 31 after being condensed by condenser 2 .
  • the refrigerant is throttled by the main capillary 3 , and becomes low-pressure low-temperature liquid.
  • the liquid partially evaporates into low-temperature gas in the freezing evaporator 41 to absorb the heat energy of the freezing chamber F.
  • the remaining liquid which does not evaporate, flows into the refrigerating evaporator 51 and continues to evaporate, to absorb the heat energy of the refrigerating chamber R, and finally evaporates into low-temperature gas completely, which is inhaled into the compressor 1 after being heated by gas returning pipe 6 , and thereby forms the cycle; here refrigerating and freezing are involved in the cycle simultaneously, which can be utilized as refrigerator of common practice.
  • the system load is the load of refrigerating and freezing in series, which is constant, therefore, the refrigeration system cycle efficiency can be adjusted into an optimum efficiency under the target surrounding temperature, and effectively enhance the energy conversion rate.
  • the main CPU controls the magnet valve 31 to switch on the main cycle and the auxiliary refrigerating cycle; the refrigerant is compressed into high-pressure gas by the compressor 1 and is discharged, and the high-pressure gas passes through the magnet valve 31 after being condensed by the condenser 2 .
  • the refrigerant is throttled by the main capillary 3 , and becomes low-pressure low-temperature liquid.
  • the liquid partially evaporates into low-temperature gas in the freezing evaporator 41 to absorb the heat energy of freezing chamber F.
  • the remaining liquid which does not evaporate, flows into the refrigerating evaporator 51 and continues to evaporate to absorb the heat energy of the refrigerating chamber R.
  • the refrigerant is throttled by the auxiliary refrigerating capillary 32 , and becomes low-pressure low-temperature liquid.
  • the liquid evaporates into low-temperature gas in auxiliary refrigerating evaporator 52 to absorb the heat energy of the refrigerating chamber R.
  • the liquid finally evaporates into low-temperature gas completely, which is inhaled into compressor 1 after being heated by gas returning pipe 6 , and thereby forms cycle; here the temperature of refrigerating chamber can be decreased, which realizes the function of fast cooling for one aspect, and realizes the function of converting the refrigerating chamber into freezing chamber for another aspect. It is particularly suitable for storing large amount of frozen food periodically.
  • the freezing temperature of the refrigerating chamber can be regulated by adjusting the duration of switch on and off of the magnet valve 31 , and this is a very practical function, which is also very suitable for the use of Chinese people.
  • the CPU can control the magnet valve to switch off freezing cycle and switch on auxiliary refrigerating cycle branch, the refrigerant is throttled by the auxiliary refrigerating capillary 32 and becomes low-pressure low-temperature liquid.
  • the liquid evaporates into low-temperature gas in the auxiliary refrigerating evaporator 52 to absorb the heat energy of the refrigerating chamber R.
  • the liquid finally evaporates into low-temperature gas completely, which is inhaled into compressor 1 after being heated by gas returning pipe 6 , and thereby forms cycle; here the freezing evaporator 41 and refrigerating evaporator 51 are not involved in refrigeration cycle, and auxiliary refrigerating evaporator 52 generates all the cooling capacity, which can be utilized as refrigerating chamber, to largely reduce the electricity consumption and save energy. This is a very practical function.
  • the matching strategy of the refrigerator according to the present invention is as follows:
  • the main operation control of the compressor adopts refrigerating temperature sensor, and system matching principle is, under the target surrounding temperature (for example, 25 ⁇ , or other temperatures, according to the average surrounding temperature of the target market or the climate type the refrigerator is designed for), to reach the refrigerating target temperature (for example, 5 ⁇ ) and freezing target temperature (for example, ⁇ 18 ⁇ ) simultaneously, and to further enhance the cycle system efficiency of the refrigerant and enable the refrigerator to reach the optimal energy saving target under the common target surrounding temperature when refrigerating and freezing are operating simultaneously.
  • target surrounding temperature for example, 25 ⁇ , or other temperatures, according to the average surrounding temperature of the target market or the climate type the refrigerator is designed for
  • the refrigerating target temperature for example, 5 ⁇
  • freezing target temperature for example, ⁇ 18 ⁇
  • the typical temperature control strategy of the refrigerator according to the present invention is as follows: When surrounding temperature rises or refrigerating load changes, the refrigerating temperature rises to a point which is higher than a certain level (refrigerating target temperature+X), then the magnet valve of the auxiliary refrigerating cycle loop will be switched on to reduce the temperature of the refrigerating chamber solely and reach the refrigerating target temperature. When freezing temperature drops to a point which is lower than a certain level (freezing target temperature ⁇ Y), the magnet valve of the freezing will be switched off to cut off the freezing cycle loop and reduce the energy loss.
  • X is 1 ⁇ 3 ⁇
  • Y is 2 ⁇ 5 ⁇ .
  • the difference between present embodiment and embodiment 4 lies in that, the auxiliary refrigerating cycle branch is still connected to the input port of the gas returning pipe, and the position of refrigerating evaporator 51 and that of freezing evaporator in the refrigeration loop shift with each other, so that the end of the auxiliary refrigerating cycle loop is connected between freezing evaporator 41 and gas returning pipe 6 , and the other parts being the same as that of the embodiment 4.
  • the refrigerator according to the present invention includes but is not limited to drawer type and shelf type of home refrigerating freezing refrigerator, regardless of the vertical and horizontal relative positions of the refrigerating chamber and the freezing chamber.
  • the refrigerator having multi-cycle refrigeration system and control method thereof can be applied in the manufacture of and use of various refrigerators with refrigerating and freezing chambers, and the industrial application has wide prospect.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US11/568,432 2004-08-19 2004-11-24 Refrigerator Having Multi-Cycle Refrigeration System And Control Method Thereof Abandoned US20080190123A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CN200410035589.0 2004-08-19
CN 200410035589 CN1598447A (zh) 2004-08-19 2004-08-19 复立多循环制冷系统冰箱及其控制方法
CN200410035588.0 2004-08-19
CN 200410035588 CN1598446A (zh) 2004-08-19 2004-08-19 冷藏变温的冰箱及其控制方法
PCT/CN2004/001346 WO2006017959A1 (fr) 2004-08-19 2004-11-24 Refrigerateur composite possedant un systeme de refrigeration a cycles multiples et son procede de controle

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EP (1) EP1780484A1 (fr)
WO (1) WO2006017959A1 (fr)

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US20120023975A1 (en) * 2010-08-02 2012-02-02 Samsung Electronics Co., Ltd. Refrigerator and control method thereof
CN102589182A (zh) * 2012-03-05 2012-07-18 合肥美的荣事达电冰箱有限公司 制冷系统以及具有该制冷系统的冰箱和该冰箱的控制方法
US10539357B2 (en) * 2015-12-08 2020-01-21 Lg Electronics Inc. Refrigerator and method of controlling the same
US10544979B2 (en) 2016-12-19 2020-01-28 Whirlpool Corporation Appliance and method of controlling the appliance
CN112730860A (zh) * 2020-12-18 2021-04-30 南通华兴石油仪器有限公司 一种密闭条件下输送循环实验装置
US20220018590A1 (en) * 2018-11-30 2022-01-20 Samsung Electronics Co., Ltd. Refrigerator and method of controlling the same

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CN111854236B (zh) * 2020-08-27 2023-12-12 河北省人工影响天气中心 改进的温控系统及方法

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