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CN100572992C - refrigerator - Google Patents

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Publication number
CN100572992C
CN100572992C CNB2004800321223A CN200480032122A CN100572992C CN 100572992 C CN100572992 C CN 100572992C CN B2004800321223 A CNB2004800321223 A CN B2004800321223A CN 200480032122 A CN200480032122 A CN 200480032122A CN 100572992 C CN100572992 C CN 100572992C
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China
Prior art keywords
refrigerating chamber
cooling
refrigerator
temperature
loop
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Expired - Fee Related
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CNB2004800321223A
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Chinese (zh)
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CN1875230A (en
Inventor
中西和也
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Publication of CN1875230A publication Critical patent/CN1875230A/en
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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
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The present invention relates to the power saving of refrigerator.Refrigerating chamber (21) is with the direct-cooled mode cooling, and refrigerating chamber (22) cools off in a cold mode.Flow channel switching valve (32) switches in series refrigerated compartment (21) and the refrigerating chamber and the refrigerating chamber loop of refrigerating chamber (22) or the refrigerating chamber loop of only cooling off refrigerating chamber (22) simultaneously according to the signal from refrigerator temperature sensor (29) and freezer temperature sensor (30) with refrigerant flow path.Refrigeration closing temperature poor of opening temperature and finishing cooling by the refrigeration that makes the cooling that begins to carry out refrigerating chamber (21), open temperature and finish the difference of refrigeration closing temperature of cooling than the refrigeration of the cooling that begins to carry out refrigerating chamber (22) little, can be with from refrigerating chamber and the refrigerating chamber loop begins to cool off and the stable circulation that finishes cooling in the refrigerating chamber loop makes the refrigerator running.

Description

冰箱 refrigerator

技术领域 technical field

本发明涉及交替进行冷藏室及冷冻室的同时冷却、以及冷冻室的冷却并且冷藏室以直冷方式进行冷却而冷冻室以间冷方式进行冷却的冰箱的省电。The present invention relates to power saving of a refrigerator in which simultaneous cooling of a refrigerator compartment and a freezer compartment and cooling of a freezer compartment are alternately performed, and the refrigerator compartment is cooled by direct cooling and the freezer compartment is cooled by indirect cooling.

背景技术 Background technique

现有的中型、大型冷冻冷藏冰箱具有用于冷却冷藏室的冷藏室用蒸发器和冷藏室冷却用风扇、以及用于冷却冷冻室的冷冻室用蒸发器和冷冻室冷却用风扇，并将冷藏室和冷冻室都以间冷方式进行冷却。Existing medium-sized and large freezer-refrigerators have an evaporator for cooling the refrigerating room and a fan for cooling the refrigerating room, and an evaporator for cooling the refrigerating room and a fan for cooling the refrigerating room. Both the compartment and the freezer are cooled by indirect cooling.

图7是日本专利申请公布号特表平10-503277号公报所记载的现有的冰箱。冷藏室1和冷冻室2上下分区形成。在机壳3和形成冷藏室1的内箱4之间填充绝热材料5。在冷藏室1的最里面设置有冷藏室用蒸发器6和使冷藏室1内的空气通过冷藏室用蒸发器6进行循环的冷藏室冷却风扇7。在冷冻室2的最里面设置有冷冻室用蒸发器8和使冷冻室2内的空气通过冷冻室用蒸发器8进行循环的冷冻室冷却风扇9。在冷藏室和冷冻室分别设置有冷藏室温度传感器10和冷冻室温度传感器11。Fig. 7 is a conventional refrigerator described in Japanese Patent Application Publication No. 10-503277. The refrigerating chamber 1 and the freezing chamber 2 are formed in upper and lower partitions. A heat insulating material 5 is filled between the cabinet 3 and the inner box 4 forming the refrigerator compartment 1 . Refrigerator compartment evaporator 6 and refrigerator compartment cooling fan 7 that circulates air in refrigerator compartment 1 through refrigerator compartment evaporator 6 are provided at the innermost side of refrigerator compartment 1 . Freezer evaporator 8 and freezer cooling fan 9 for circulating the air in freezer 2 through freezer evaporator 8 are provided at the innermost side of freezer 2 . A refrigerator compartment temperature sensor 10 and a freezer compartment temperature sensor 11 are provided in the refrigerator compartment and the freezer compartment, respectively.

具有微型计算机(未图示)的控制电路12控制压缩机13、切换阀14、冷却风扇7、冷却风扇9的运转而将冷藏室1和冷冻室2控制为规定温度。Control circuit 12 having a microcomputer (not shown) controls operation of compressor 13, switching valve 14, cooling fan 7, and cooling fan 9 to control refrigerator compartment 1 and freezer compartment 2 to predetermined temperatures.

然而，由于上述现有的结构是分别用冷却风扇7和冷却风扇9搅拌冷藏室1和冷藏室2的间冷方式，所以一方面是箱内的温度分布好食品冷却速度快，而另一方面从密封垫等的热泄漏也大。而且需要冷气用通道、除霜电路等，因此无法简单地构成冷却循环。Yet, because above-mentioned existing structure is the indirect cooling mode that stirs refrigerating room 1 and refrigerating room 2 with cooling fan 7 and cooling fan 9 respectively, so on the one hand the temperature distribution in the box is good food cooling speed is fast, and on the other hand The heat leakage from the gasket and the like is also large. In addition, a passage for cooling air, a defrosting circuit, and the like are required, so that a simple cooling cycle cannot be constituted.

因此，虽然提出了热泄漏少、在冷藏室使用能够利用自然对流简单地构成冷却循环的直冷方式蒸发器的冰箱，但在实际使用时，会出现并没有按照预先设置的程序使冰箱运转的情况，因此存在超出需要地冷却冷冻室而使耗电量反而增加的问题。本发明能够降低对冷藏室采用直冷方式的冰箱的耗电。Therefore, although a refrigerator with less heat leakage and a direct-cooling evaporator that can easily form a cooling cycle by natural convection has been proposed in the refrigerator, in actual use, the refrigerator does not operate according to the preset program. Therefore, there is a problem that the power consumption is increased by cooling the freezer more than necessary. The invention can reduce the power consumption of the refrigerator adopting the direct cooling method for the refrigerator compartment.

发明内容 Contents of the invention

本发明的冰箱，具有：压缩制冷剂的压缩机；由冷藏室用蒸发器直接冷却的冷藏室；检测冷藏室的温度的冷藏室温度传感器；由冷冻室用蒸发器和冷冻室冷却风扇间接冷却的冷冻室；检测冷冻室的温度的冷冻室温度传感器；以及流路切换阀，其按照来自所述冷藏室温度传感器和所述冷冻室温度传感器的信号，将制冷剂流路切换到串联地同时冷却所述冷藏室及所述冷冻室的冷藏室及冷冻室回路、或者仅冷却所述冷冻室的冷冻室回路，其特征在于，具有如下的冷却循环，即，通过使开始进行所述冷藏室的冷却的制冷开启温度(温度)以及结束冷却的制冷关闭温度(オフ温度)之差比开始进行所述冷冻室的冷却的制冷开启温度以及结束冷却的制冷关闭温度之差小，从所述冷藏室及冷冻室回路开始进行冷却，并且在所述冷冻室回路结束冷却，以在所述冷却结束后避免在所述冷冻室回路中开始冷却，如此地，再次从所述冷藏室及冷冻室回路开始进行冷却，在所述压缩机停止过程中，使所述流路切换阀向所述冷藏室及所述冷冻室回路侧打开。The refrigerator of the present invention has: a compressor for compressing refrigerant; a refrigerating room directly cooled by an evaporator for the refrigerating room; a refrigerating room temperature sensor for detecting the temperature of the refrigerating room; indirect cooling by the evaporator for the freezing room and a cooling fan for the freezing room a freezer compartment; a freezer temperature sensor that detects the temperature of the freezer compartment; and a flow path switching valve that switches the refrigerant flow path to be connected in series simultaneously in accordance with signals from the freezer compartment temperature sensor and the freezer compartment temperature sensor. The refrigerating room and freezing room circuit for cooling the refrigerating room and the freezing room, or the freezing room circuit for cooling only the freezing room, is characterized in that it has a cooling cycle in which the refrigerating room is The cooling start temperature of the cooling ( temperature) and the cooling off temperature (of temperature) at the end of cooling is smaller than the difference between the cooling on temperature at which the cooling of the freezer compartment is started and the cooling off temperature at the end of cooling, starting from the refrigerator compartment and the freezer compartment circuit cooling, and end cooling in the freezer circuit, to avoid starting cooling in the freezer circuit after the end of the cooling, so that cooling starts again from the refrigerator and freezer circuit, in the During the stop of the compressor, the flow path switching valve is opened to the circuit side of the refrigerator compartment and the freezer compartment.

由此，能够以从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环使冰箱运转。其结果，能够将冷藏室及冷冻室冷却到适当的温度，从而降低了冰箱的耗电。Accordingly, the refrigerator can be operated in a stable cycle in which cooling is started from the refrigerator compartment and the freezer compartment circuit and cooling is completed by the freezer compartment circuit. As a result, the refrigerator compartment and the freezer compartment can be cooled to an appropriate temperature, thereby reducing the power consumption of the refrigerator.

附图说明 Description of drawings

图1是本发明的第一实施例的冰箱的剖面图；Fig. 1 is the sectional view of the refrigerator of the first embodiment of the present invention;

图2是本发明的第一实施例的冰箱的冷冻循环图；Fig. 2 is the refrigerating cycle diagram of the refrigerator of the first embodiment of the present invention;

图3是本发明的第一实施例的冰箱的时间图；Fig. 3 is a time chart of the refrigerator of the first embodiment of the present invention;

图4是本发明的第二实施例的冰箱的时间图；Fig. 4 is a time chart of the refrigerator of the second embodiment of the present invention;

图5是本发明的第三实施例的冰箱的时间图；Fig. 5 is a time chart of the refrigerator of the third embodiment of the present invention;

图6是本发明的第四实施例的冰箱的时间图；Fig. 6 is a time chart of the refrigerator of the fourth embodiment of the present invention;

图7是现有的冰箱的剖面图；Fig. 7 is the sectional view of existing refrigerator;

标记说明Mark description

21冷藏室；21 cold room;

22冷冻室；22 freezer;

26冷藏室用蒸发器；26 Evaporators for refrigerators;

27冷冻室用蒸发器；27 Evaporators for freezing chambers;

28冷却风扇；28 cooling fans;

29冷藏室温度传感器；29 refrigerator temperature sensor;

30冷冻室温度传感器；30 freezer temperature sensor;

31压缩机；31 compressors;

32流路切换阀；32 flow switching valves;

39、40冷藏室的制冷开启温度、制冷关闭温度；39, 40 The refrigeration opening temperature and refrigeration closing temperature of the refrigerator;

41、42冷冻室的制冷开启温度、制冷关闭温度。41, 42 The refrigeration opening temperature and refrigeration closing temperature of the freezer.

具体实施方式 Detailed ways

下面，参照附图对本发明的实施例进行说明。另外，该发明不受该实施例的限定。Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to this Example.

(第一实施例)(first embodiment)

图1是本发明的第一实施例的冰箱的剖面图。冷藏室21和冷冻室22上下分区形成。在机壳23和形成冷藏室21的内箱24之间填充有绝热材料25。在冷藏室21的最里面配置了冷藏室用蒸发器26。在冷冻室22的最里面配置有冷冻室用蒸发器27、以及使冷冻室22内的空气通过冷冻室用蒸发器27进行循环的冷冻室冷却风扇28。Fig. 1 is a sectional view of a refrigerator according to a first embodiment of the present invention. The refrigerating chamber 21 and the freezing chamber 22 are formed in upper and lower partitions. A heat insulating material 25 is filled between the cabinet 23 and the inner box 24 forming the refrigerator compartment 21 . Refrigerating room evaporator 26 is arranged at the innermost side of refrigerating room 21 . A freezer evaporator 27 and a freezer cooling fan 28 that circulates air in the freezer 22 through the freezer evaporator 27 are arranged at the innermost side of the freezer 22 .

例如，作为热敏电阻的冷藏室温度传感器29、冷冻室温度传感器30分别检测冷藏室21和冷冻室22的温度。控制电路33控制压缩机31、流路切换阀32、冷却风扇28。压缩机31和流路切换阀32考虑使用可燃性制冷剂时的安全性而配置在机械室34内。压缩机31能够以例如逆变器电路的转速控制来改变冷冻能力。For example, refrigerator compartment temperature sensor 29 and freezer compartment temperature sensor 30 , which are thermistors, detect the temperatures of refrigerator compartment 21 and freezer compartment 22 , respectively. The control circuit 33 controls the compressor 31 , the channel switching valve 32 , and the cooling fan 28 . The compressor 31 and the flow switching valve 32 are arranged in the machine room 34 in consideration of safety when using a flammable refrigerant. The compressor 31 can change the refrigerating capacity by controlling the rotational speed of an inverter circuit, for example.

图2是本发明的第一实施例的冰箱的冷冻循环，其由压缩机31、冷凝器35、干燥器36、流路切换阀32、第一毛细管37、第二毛细管38、冷藏室用蒸发器26、冷冻室用蒸发器27及连接它们的配管形成。Fig. 2 is the refrigerating cycle of the refrigerator of the first embodiment of the present invention, and it is made up of compressor 31, condenser 35, drier 36, flow path switching valve 32, first capillary 37, second capillary 38, refrigerating room use evaporator The evaporator 27 and the pipes connecting them are formed with the evaporator 26 and the freezer compartment.

流路切换阀32按照来自冷藏室温度传感器29和冷冻室传感器30的信号使制冷剂在通过第二毛细管38和冷冻室用蒸发器27的冷冻室回路；或者通过第一毛细管37、冷藏室用蒸发器26、冷冻室用蒸发器27的冷藏室及冷冻室回路流动。冷冻室回路的情况只冷却冷冻室，而冷藏室及冷冻室回路的情况是串联地同时冷却冷藏室和冷冻室。The flow path switching valve 32 makes the refrigerant pass through the second capillary tube 38 and the freezer circuit of the evaporator 27 for the freezer according to signals from the refrigerator temperature sensor 29 and the freezer sensor 30; The evaporator 26 and the evaporator 27 for the freezer compartment flow in the refrigerator compartment and the freezer compartment circuit. The case of the freezer circuit cools only the freezer, while the case of the refrigerator and freezer circuit cools both the refrigerator and the freezer in series.

使用图3的时间图说明以上那样构成的冰箱的动作。首先，在压缩机停止过程中，当冷藏室温度传感器29和冷冻室温度传感器30中的任意一个检测出大于或等于预先设定的规定的温度时，例如当冷冻室温度传感器30检测出大于或等于预先设定的制冷开启温度41时，则控制电路33接受来自冷冻室温度传感器30的信号而使压缩机31工作，并将流路切换阀32向第二毛细管38侧开放而冷却冷冻室22。The operation of the refrigerator configured as above will be described using the time chart of FIG. 3 . First, during the stop of the compressor, when any one of the refrigerating compartment temperature sensor 29 and the freezing compartment temperature sensor 30 detects a temperature greater than or equal to a predetermined temperature, for example, when the freezing compartment temperature sensor 30 detects a temperature greater than or equal to When it is equal to the preset cooling start temperature 41, the control circuit 33 receives the signal from the freezing chamber temperature sensor 30 to make the compressor 31 work, and opens the flow path switching valve 32 to the second capillary 38 side to cool the freezing chamber 22 .

从压缩机31排出的高温高压的制冷剂在冷凝器35中放热并冷凝液化，并且经过流路切换阀32被第二毛细管38减压而到达冷冻室用蒸发器27。与冷冻室22内的空气进行了热交换的制冷剂在冷冻室用蒸发器27中蒸发气化，从而冷冻室22内的空气被冷却。The high-temperature and high-pressure refrigerant discharged from the compressor 31 releases heat in the condenser 35 , is condensed and liquefied, and is depressurized by the second capillary tube 38 through the flow path switching valve 32 to reach the evaporator 27 for the freezer compartment. The refrigerant that has exchanged heat with the air in freezer compartment 22 evaporates and vaporizes in freezer compartment evaporator 27 , thereby cooling the air in freezer compartment 22 .

在冷冻室22的冷却过程中，当冷冻室温度传感器30检测出大于或等于预先设定的制冷关闭温度42，并且冷藏室温度传感器29检测出大于或等于预先设定的制冷开启温度39时，则控制电路33接受来自冷藏室温度传感器29的信号，将流路切换阀32向第一毛细管37侧开放而将冷藏室21和冷冻室22串联地冷却。During the cooling process of the freezer compartment 22, when the freezer compartment temperature sensor 30 detects that it is greater than or equal to the preset cooling off temperature 42, and the refrigerating compartment temperature sensor 29 detects that it is greater than or equal to the preset cooling on temperature 39, Then, the control circuit 33 receives the signal from the refrigerating compartment temperature sensor 29, opens the flow path switching valve 32 to the first capillary 37 side, and cools the refrigerating compartment 21 and the freezing compartment 22 in series.

从压缩机31排出的高温高压制冷剂在冷凝器35中放热并冷凝液化，经流路转换器32而被第一毛细管37减压并到达冷藏室用蒸发器26。与冷藏室21内的空气积极地进行了热交换的制冷剂在冷藏室用蒸发器26内一部分蒸发气化，并且进行了热交换的空气变为较低温度的空气而冷却冷藏室21，之后，气化的制冷剂和没有气化的制冷剂到达冷冻室用蒸发器27，与冷冻室22的空气进行了热交换的制冷剂在冷冻室用蒸发器27内蒸发气化，从而使冷冻室22内的空气被冷却。气化的制冷剂被吸入压缩机31。The high-temperature and high-pressure refrigerant discharged from the compressor 31 releases heat in the condenser 35 , is condensed and liquefied, passes through the flow switch 32 , is decompressed by the first capillary tube 37 , and reaches the refrigerating room evaporator 26 . The refrigerant that has actively exchanged heat with the air in the refrigerator compartment 21 is partially evaporated and vaporized in the refrigerator compartment evaporator 26, and the air that has undergone the heat exchange becomes air at a lower temperature to cool the refrigerator compartment 21, and then , the vaporized refrigerant and the non-evaporated refrigerant reach the evaporator 27 for the freezer compartment, and the refrigerant that has carried out heat exchange with the air in the freezer compartment 22 evaporates and gasifies in the evaporator 27 for the freezer compartment, thereby making the freezer compartment The air inside 22 is cooled. The vaporized refrigerant is sucked into the compressor 31 .

如以上那样，按照来自冷藏室温度传感器29和冷冻室温度传感器30的信号，用流路切换阀32将制冷剂的流动向冷冻室回路或者冷藏室及冷冻室回路切换，从而对冷藏室和冷冻室的温度进行控制。As above, according to the signals from the refrigerating compartment temperature sensor 29 and the freezing compartment temperature sensor 30, the flow of the refrigerant is switched to the freezing compartment circuit or the refrigerating compartment and freezing compartment circuit by the flow path switching valve 32, so that the refrigerating compartment and the freezing compartment are switched. The room temperature is controlled.

此外，为了将冷藏室21温度控制在约4℃到5℃，将冷冻室22温度控制在约-18℃，对冷藏室21开始冷却的制冷开启温度39及停止冷却的制冷关闭温度40、以及对冷冻室22开始冷却的制冷开启温度41及停止冷却的制冷关闭温度42被预先编入控制电路33的控制程序中。控制电路33接受冷藏室温度传感器29和冷冻室温度传感器30检测的冷藏室21和冷冻室22的箱内温度的信号，来操作压缩机31和流路切换阀32。In addition, in order to control the temperature of the refrigerating chamber 21 at about 4°C to 5°C, the temperature of the freezing chamber 22 is controlled at about -18°C, the cooling on temperature 39 to start cooling the refrigerating chamber 21 and the cooling off temperature 40 to stop cooling, and The cooling-on temperature 41 for starting cooling of the freezing chamber 22 and the cooling-off temperature 42 for stopping cooling are programmed into the control program of the control circuit 33 in advance. Control circuit 33 operates compressor 31 and flow path switching valve 32 in response to signals of the interior temperatures of refrigerator compartment 21 and freezer compartment 22 detected by refrigerator compartment temperature sensor 29 and freezer compartment temperature sensor 30 .

其中，通过使对冷藏室21开始冷却的制冷开启温度39与停止冷却的制冷关闭温度40的差(以下称为冷藏室差动)，比对冷冻室22开始冷却的制冷开启温度41与停止冷却的制冷关闭温度42的差(以下称为冷冻室差动)小，例如通过将冷藏室差动设为约1℃，将冷冻室差动设为约3℃，使得当冷藏室21达到规定的约5℃、而冷冻室22达到规定的约-18℃时压缩机31停止，在压缩机31停止过程中，受周围温度的影响使冷藏室21和冷冻室22吸热而温度上升，但由于冷藏室21的箱内温度比冷冻室22的箱内温度先达到开始冷却的制冷开启温度，所以必然是由冷藏室及冷冻室回路开始进行冷却。Among them, by making the difference between the cooling on temperature 39 at which the refrigerating chamber 21 starts cooling and the cooling off temperature 40 at which the cooling is stopped (hereinafter referred to as the refrigerator compartment differential), the cooling on temperature 41 at which the freezing chamber 22 starts to cool is compared with the temperature at which the cooling is stopped. The difference of the cooling off temperature 42 (hereinafter referred to as the freezer differential) is small, for example, by setting the freezer differential to about 1°C and the freezer differential to about 3°C, so that when the freezer 21 reaches the specified The compressor 31 stops when the freezer compartment 22 reaches the specified temperature of about -18°C. During the stop of the compressor 31, the refrigerator compartment 21 and the freezer compartment 22 absorb heat due to the influence of the ambient temperature and the temperature rises. The temperature in the refrigerator compartment 21 reaches the cooling start temperature for cooling earlier than the temperature in the freezer compartment 22, so the refrigeration compartment and the freezer compartment circuit must start to cool.

如以上那样，在本实施例中，通过使冷藏室温度传感器29的制冷开启温度39和制冷关闭温度40的差、比冷冻室温度传感器30的制冷开启温度41和制冷关闭温度42的差小，能够以从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环使冰箱运转，抑制了使冷冻室小于或等于制冷关闭温度42、即对冷冻室超出需要地进行冷却而使耗电量增加的情况，从而能够谋求省电。As described above, in this embodiment, by making the difference between the cooling-on temperature 39 and the cooling-off temperature 40 of the refrigerating compartment temperature sensor 29 smaller than the difference between the cooling-on temperature 41 and the cooling-off temperature 42 of the freezing compartment temperature sensor 30, The refrigerator can be operated in a stable cycle in which cooling is started from the refrigerating chamber and the freezing chamber circuit and cooling is completed in the freezing chamber circuit, which prevents the freezing chamber from being lower than or equal to the refrigeration shutdown temperature 42, that is, cooling the freezing chamber more than necessary. If the power consumption increases, it is possible to save power.

(第二实施例)(second embodiment)

图4是本发明的第二实施例的时间图。对与第一实施例相同的动作省略说明，而仅说明压缩机转速的控制。Fig. 4 is a time chart of the second embodiment of the present invention. The description of the same operation as that of the first embodiment is omitted, and only the control of the rotation speed of the compressor will be described.

在从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环中，通过使冷藏室及冷冻室回路时的压缩机31的转速(以下称为R2)比冷冻室回路时的压缩机31的转速(以下称为R1)低，能够降低占耗电的大半的压缩机的输入，并且通过在需要冷却能够的冷冻室回路时采用比冷藏室及冷冻室回路时高的转速，能够抑制冷冻室回路时的运转时间，从而能够谋求省电。In a stable cycle in which cooling starts from the refrigerator and freezer circuit and ends cooling in the freezer circuit, by setting the rotational speed of the compressor 31 (hereinafter referred to as R 2 ) during the refrigerator and freezer circuit to be higher than that of the freezer circuit When the rotational speed of the compressor 31 (hereinafter referred to as R 1 ) is low, the input of the compressor that accounts for most of the power consumption can be reduced, and by adopting a higher speed than that of the refrigerator and freezer circuits when the freezer circuit that needs to be cooled can The rotation speed of the freezer can suppress the operation time of the freezer circuit, so as to save power.

此外，在从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环中，例如在冷藏室的容量大而冷藏室及冷冻室回路的运转时间变长的情况下，通过使冷冻室回路时的压缩机31的转速(R1)比冷藏室及冷冻室回路时的压缩机31的转速(R2)低，能够缩短冷藏室及冷冻室回路的运转时间，从而能够谋求省电。In addition, in a stable cycle in which cooling is started from the refrigerator and freezer circuit and cooling is completed by the freezer circuit, for example, when the capacity of the refrigerator is large and the operation time of the refrigerator and freezer circuit becomes longer, by The rotational speed (R 1 ) of the compressor 31 during the freezer circuit is lower than the rotational speed (R 2 ) of the compressor 31 during the refrigerator and freezer circuit, so that the operation time of the refrigerator and freezer circuit can be shortened, thereby achieving save electricity.

(第三实施例)(third embodiment)

图5是本发明的第三实施例的时间图。对与第一实施例相同的动作省略说明，仅说明冷却风扇转速的控制。Fig. 5 is a time chart of the third embodiment of the present invention. The description of the same operation as that of the first embodiment is omitted, and only the control of the rotation speed of the cooling fan will be described.

在从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环中，通过在冷冻室回路的冷却开始时，在T1时间中改变冷冻室冷却风扇28的转速，例如当将冷冻室回路时的冷却风扇28的转速设为R3时，通过使其以比R3低转速的R5进行旋转，抑制了在冷冻室回路的冷却开始时，在冷冻室用蒸发器27的蒸发温度高而热交换效率差的状态下进行热交换，降低了冷却风扇28的输入，从而能够提高在冷冻室回路的冷却开始时的冷却效率，而能够谋求省电。In a stable cycle in which cooling starts from the refrigerator and freezer circuits and ends cooling in the freezer circuit, by changing the rotation speed of the freezer cooling fan 28 during the time T1 when the cooling of the freezer circuit starts, for example, when the When the rotation speed of the cooling fan 28 during the freezer circuit is set to R3 , by making it rotate at R5 , which is lower than R3 , the cooling of the freezer circuit is suppressed, and the evaporator 27 for the freezer is suppressed. Heat exchange is performed in a state where the evaporating temperature is high and the heat exchange efficiency is poor, and the input of the cooling fan 28 is reduced, so that the cooling efficiency at the start of cooling of the freezer circuit can be improved, and power saving can be achieved.

(第四实施例)(fourth embodiment)

图6是本发明的第四实施例的时间图。对与第一实施例相同的动作省略说明，仅说明冷却风扇转速的控制。在从冷藏室及冷冻室回路开始进行冷却而在冷冻室回路结束冷却的稳定的循环中，通过在冷藏室及冷冻室回路的冷却开始时，在T2时间中使冷冻室冷却风扇28停止，抑制了在冷藏室及冷冻室回路的冷却开始时，在冷冻室用蒸发器27的蒸发温度高而热交换效率差的状态下进行热交换，降低了冷却风扇28的输入，从而能够提高在冷藏室及冷冻室回路的冷却开始时的冷却效率，而能够谋求省电化。Fig. 6 is a time chart of the fourth embodiment of the present invention. The description of the same operation as that of the first embodiment is omitted, and only the control of the rotation speed of the cooling fan will be described. In a stable cycle in which cooling is started from the refrigerating room and the freezing room circuit and cooling is completed in the freezing room circuit, by stopping the cooling fan 28 for the freezing room in T2 time when the cooling of the refrigerating room and the freezing room circuit is started, When the cooling of the refrigerating room and the freezing room circuit starts, the evaporating temperature of the evaporator 27 for the freezing room is high and the heat exchange efficiency is poor. The cooling efficiency at the start of the cooling of the chamber and the freezer circuit can be improved, and power saving can be achieved.

此外，通过在压缩机31停止过程中，使本实施例的流路切换阀32向冷藏室及冷冻室回路侧打开，能够使制冷剂充满冷藏室及冷冻室回路而改善了压缩机31启动时的冷却效率，进而能够提高在冷藏室及冷冻室回路的冷却开始时的冷却效率，从而能够谋求省电。In addition, by opening the flow path switching valve 32 of this embodiment to the side of the refrigerator and freezer circuits during the stop of the compressor 31, the refrigerant can be filled into the refrigerator and freezer circuits to improve the performance of the compressor 31 when it is started. The cooling efficiency can be improved, and the cooling efficiency at the start of the cooling of the refrigerator compartment and the freezer compartment circuit can be improved, so that power can be saved.

产业上利用的可能性Possibility of industrial use

本发明的冰箱，由于降低了耗电量，所以能够广泛利用。此外，本发明也能够适用于珀尔帖式(ペルチエ式)冰箱等。The refrigerator of the present invention can be widely used because of reduced power consumption. In addition, the present invention can also be applied to Peltier type (Peltier type) refrigerators and the like.

Claims (5)

1, a kind of refrigerator, it has: the compressor of compressed refrigerant; The refrigerating chamber that directly cools off with evaporimeter by refrigerating chamber; Detect the refrigerator temperature sensor of the temperature of refrigerating chamber; By the refrigerating chamber of refrigerating chamber with evaporimeter and the indirect cooling of refrigerating chamber cooling fan; Detect the freezer temperature sensor of the temperature of refrigerating chamber; And flow channel switching valve, it is according to the signal from described refrigerator temperature sensor and described freezer temperature sensor, refrigerant flow path is switched to the refrigerating chamber and the refrigerating chamber loop of in series cooling off described refrigerating chamber and described refrigerating chamber simultaneously, perhaps switch to the refrigerating chamber loop of only cooling off described refrigerating chamber, it is characterized in that, has following cool cycles, promptly, the difference of opening temperature and finishing the refrigeration closing temperature of cooling by the refrigeration that makes the cooling that begins to carry out described refrigerating chamber open temperature than the refrigeration of the cooling that begins to carry out described refrigerating chamber and the difference of the refrigeration closing temperature that finishes to cool off little, begin to cool off from described refrigerating chamber and refrigerating chamber loop, and finish cooling in described refrigerating chamber loop, after finishing, avoid in described refrigerating chamber loop, beginning to cool down in described cooling, so, begin to cool off from described refrigerating chamber and refrigerating chamber loop once more, in described compressor stopped process, described flow channel switching valve is opened to described refrigerating chamber and described refrigerating chamber loop side.
2, refrigerator as claimed in claim 1 is characterized in that, the rotating speed of the described compressor the when rotating ratio of the described compressor when making described refrigerating chamber of cooling and refrigerating chamber loop cools off described refrigerating chamber loop is low.
3, refrigerator as claimed in claim 1 is characterized in that, the rotating speed height of the described compressor the when rotating ratio of the described compressor when making described refrigerating chamber of cooling and refrigerating chamber loop cools off described refrigerating chamber loop.
4, refrigerator as claimed in claim 1 is characterized in that, when the described refrigerating chamber of cooling loop, in the stipulated time after the cooling beginning described refrigerating chamber speed of cooling fan is changed.
5, refrigerator as claimed in claim 1 is characterized in that, when described refrigerating chamber of cooling and refrigerating chamber loop, in the stipulated time after the cooling beginning described refrigerating chamber cooling fan is stopped.
CNB2004800321223A 2003-11-28 2004-11-16 refrigerator Expired - Fee Related CN100572992C (en)

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