WO2017076001A1 - 采用变频压缩机的冰箱控制方法及控制系统 - Google Patents

采用变频压缩机的冰箱控制方法及控制系统 Download PDF

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WO2017076001A1
WO2017076001A1 PCT/CN2016/086166 CN2016086166W WO2017076001A1 WO 2017076001 A1 WO2017076001 A1 WO 2017076001A1 CN 2016086166 W CN2016086166 W CN 2016086166W WO 2017076001 A1 WO2017076001 A1 WO 2017076001A1
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WIPO (PCT)
Prior art keywords
compartment
inverter compressor
refrigeration
temperature
frequency
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PCT/CN2016/086166
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English (en)
French (fr)
Inventor
姬立胜
刘建如
朱小兵
戚斐斐
张书锋
赵彩云
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青岛海尔股份有限公司
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Priority to EP16861271.1A priority Critical patent/EP3372931B1/en
Priority to US15/770,202 priority patent/US10739066B2/en
Publication of WO2017076001A1 publication Critical patent/WO2017076001A1/zh

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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
    • F25D29/005—Mounting of control 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • 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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/023—Air curtain closures
    • 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
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/19—Calculation of parameters
    • 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
    • F25B2600/021—Inverters therefor
    • 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
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • 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
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • 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

Definitions

  • the invention relates to the technical field of refrigerator refrigeration control, in particular to a refrigerator control method and a control system using an inverter compressor.
  • Refrigerators typically include a multi-refrigeration system refrigerator (direct cooling refrigerator) and a single refrigeration system refrigerator (air-cooled refrigerator).
  • the multi-refrigeration system includes a plurality of refrigeration passages for refrigerant circulation and an inverter compressor connected to all the refrigeration passages, each of which has an evaporator;
  • the single refrigeration system includes a refrigeration passage for refrigerant circulation and An inverter compressor connected to the refrigeration passage is provided with an evaporator in the refrigeration passage.
  • the heat load required for the refrigerant to go through different cooling passages is different, and thus the required cooling capacity is also different.
  • the inverter compressor controls the refrigerant regardless of When using one of the paths, the inverters use the same input frequency, which will inevitably lead to excess cooling capacity of the inverter compressor when some refrigeration paths are taken, resulting in an increase in power consumption.
  • An air-cooled refrigerator using a single-refrigerant single-refrigeration system generally has a through damper between the refrigerating compartment and the freezing compartment.
  • the damper When the refrigerating compartment needs cooling, the damper is opened, and the refrigerating compartment does not need to be cooled when the damper is closed.
  • the refrigerating damper When the refrigerating damper is open, the cooling capacity provided by the inverter compressor needs to meet the refrigeration requirements of refrigerating and freezing.
  • the damper is closed, the cooling capacity provided by the inverter compressor only needs to meet the cooling demand of the freezing compartment.
  • the inverter compressor control uses the same input frequency regardless of whether the damper is in an open or closed state, so that it is inevitable that the refrigeration capacity generated by the compressor in the closed state of the damper is excessive, thereby causing power consumption. increase.
  • the technical problem solved by the present invention is to provide a refrigerator control method and control system using an inverter compressor to control the frequency of the inverter compressor.
  • a refrigerator control method using an inverter compressor comprising:
  • variable frequency compressor is controlled to operate at the first frequency.
  • the calculation of the total cooling capacity required for the compartment requiring refrigeration per unit time specifically includes:
  • ⁇ is the heat transferred by the heat conducting wall per unit time
  • A is the heat conductive wall area
  • ⁇ is the thermal conductivity of the heat conducting wall
  • ⁇ is the thickness of the heat conducting wall
  • ⁇ T the temperature difference between the two surfaces of the heat conducting wall, ie the ambient temperature and Difference in chamber temperature
  • the method for judging the compartment requiring refrigeration is specifically:
  • compartment temperature T is greater than the corresponding preset compartment temperature threshold T0, the compartment is considered to require refrigeration. If the compartment temperature T is less than or equal to the corresponding preset compartment temperature threshold T0, the compartment is considered to be refrigeration-free. .
  • control method further includes:
  • control method further includes:
  • the inverter compressor is controlled to operate at the third frequency.
  • a refrigerator control system using an inverter compressor comprising a temperature monitoring device and a main control board connected to the temperature monitoring device, wherein:
  • Temperature monitoring device including
  • a first temperature monitoring device disposed outside the refrigerator for monitoring the operating environment temperature of the refrigerator, and a plurality of second temperature monitoring devices disposed in the rooms of the refrigerator for monitoring the temperature of the compartments in the interiors of the refrigerators;
  • variable frequency compressor is controlled to operate at the first frequency.
  • the main control board is further used to:
  • ⁇ is the heat transferred by the heat conducting wall per unit time
  • A is the heat conductive wall area
  • ⁇ is the thermal conductivity of the heat conducting wall
  • ⁇ is the thickness of the heat conducting wall
  • ⁇ T the temperature difference between the two surfaces of the heat conducting wall, ie the ambient temperature and Difference in chamber temperature
  • the main control board is further used to:
  • compartment temperature T is greater than the corresponding preset compartment temperature threshold T0, the compartment is considered to require refrigeration. If the compartment temperature T is less than or equal to the corresponding preset compartment temperature threshold T0, the compartment is considered to be refrigeration-free. .
  • the main control board is further used to:
  • the main control board is further used to monitor whether the state of the damper in the refrigeration loop of the single system air-cooled refrigerator is changed.
  • the main control board is further configured to monitor whether at least one of the damper states in each refrigeration circuit of the multi-system air-cooled refrigerator changes.
  • the main control board is further used to:
  • the inverter compressor is controlled to operate at the third frequency.
  • the invention effectively calculates the power consumption by calculating the total cooling capacity required in the refrigerator compartment per unit time and adjusting the frequency of the inverter compressor under the condition of satisfying the refrigeration condition of the refrigerator.
  • FIG. 1 is a flow chart showing a method of controlling a refrigerator using an inverter compressor in a first embodiment of the present invention.
  • FIG. 2 is a schematic block diagram of a refrigerator control system using an inverter compressor in the first embodiment of the present invention.
  • Fig. 3 is a flow chart showing a method of judging a compartment requiring cooling in the first embodiment of the present invention.
  • FIG. 4 is a flow chart showing a method of controlling a refrigerator using an inverter compressor in a second embodiment of the present invention.
  • Fig. 5 is a flow chart showing a method of controlling a refrigerator using an inverter compressor in a third embodiment of the present invention.
  • the control method includes:
  • variable frequency compressor is controlled to operate at a first frequency.
  • the refrigerator control system using the inverter compressor in the embodiment includes a temperature monitoring device 100 and a main control board 200 connected to the temperature monitoring device 100, wherein:
  • Temperature monitoring device 100 including
  • a first temperature monitoring device disposed outside the refrigerator for monitoring the operating environment temperature of the refrigerator, and a plurality of second temperature monitoring devices disposed in the rooms of the refrigerator for monitoring the temperature of the compartments in the interiors of the refrigerators;
  • variable frequency compressor is controlled to operate at a first frequency.
  • the heat load of the refrigerator is equal to the total cooling capacity required for each compartment, and the compartments of the refrigerator are surrounded by a heat conducting wall (foaming layer), and the total cooling capacity required for each compartment is the heat conducting wall conduction. Total heat.
  • the total cooling capacity of each room in the unit time is maintained equal to the instantaneous power of the inverter compressor.
  • the calculation of the total cooling capacity per unit time includes the following steps:
  • ⁇ is the heat transferred by the heat conducting wall per unit time (W)
  • A is the heat conducting wall area (m2)
  • ⁇ is the thermal conductivity of the heat conducting wall [w/(m ⁇ K)]
  • the thickness of the ⁇ heat conducting wall (m ) ⁇ T temperature difference between the two surfaces of the heat-conducting wall (°C), that is, the difference between the ambient temperature and the compartment temperature;
  • the heat conducting wall is exemplified by a flat wall.
  • the method for judging the compartment requiring refrigeration is specifically:
  • compartment temperature T is greater than the corresponding preset compartment temperature threshold T0, the compartment is considered to require refrigeration. If the compartment temperature T is less than or equal to the corresponding preset compartment temperature threshold T0, the compartment is considered to be refrigeration-free. .
  • the present invention can be applied to various types of refrigerators, such as a single refrigeration system air-cooled refrigerator, a multi-refrigeration system air-cooled refrigerator, a multi-refrigeration system, a direct-cooling refrigerator, and the like.
  • a single refrigeration system air-cooled refrigerator such as a single refrigeration system air-cooled refrigerator, a multi-refrigeration system air-cooled refrigerator, a multi-refrigeration system, a direct-cooling refrigerator, and the like.
  • a multi-refrigeration system air-cooled refrigerator such as a single refrigeration system air-cooled refrigerator, a multi-refrigeration system air-cooled refrigerator, a multi-refrigeration system, a direct-cooling refrigerator, and the like.
  • the present embodiment will be further described below in conjunction with specific embodiments.
  • a single refrigeration system air-cooled refrigerator is described.
  • the refrigerator includes two compartments, a refrigerating compartment and a freezing compartment, and a refrigerating compartment is provided between the refrigerating compartment and the freezing compartment.
  • Room chilling damper The outside of the refrigerator is provided with a first temperature monitoring device for monitoring the operating environment temperature of the refrigerator, and the refrigerator refrigerating compartment and the freezing compartment are respectively provided with a plurality of second temperature monitoring devices for monitoring the temperature of the compartment inside the compartment.
  • the preset temperature threshold T02 of the freezing compartment is -15 °C.
  • the inverter compressor is turned off. If the compartment temperature of the freezer compartment is monitored to be greater than -15 °C, the free compartment is indicated. Refrigeration is required to further monitor the compartment temperature in the refrigerated compartment, including the following two situations:
  • variable frequency compressor is controlled to operate at a first frequency.
  • variable frequency compressor is controlled to operate at a first frequency.
  • a multi-refrigeration system air-cooled refrigerator is taken as an example, and the refrigerator includes a plurality of refrigerations.
  • each refrigeration system comprises two compartments, a refrigerating compartment and a freezing compartment, and a damper for controlling the refrigerating compartment cooling is provided between each refrigerating compartment and the freezing compartment.
  • the outside of the refrigerator is provided with a first temperature monitoring device for monitoring the operating environment temperature of the refrigerator, and the refrigerating compartment and the freezing compartment are respectively provided with a plurality of second temperature monitoring devices for monitoring the temperature of the compartment inside the compartment.
  • a multi-refrigeration system direct cooling refrigerator is taken as an example.
  • the refrigerator includes two compartments, a refrigerating compartment and a freezing compartment, and the refrigerant flows to the refrigerating compartment and the freezing compartment, respectively.
  • a first temperature monitoring device for monitoring the operating environment temperature of the refrigerator is disposed outside the refrigerator, and a second temperature monitoring device for monitoring the temperature of the compartment inside the compartment is respectively provided in the refrigerator refrigerating compartment and the freezing compartment.
  • the flow direction of the refrigerant is determined.
  • the preset temperature threshold T01 of the refrigerating compartment is set to 0 ° C, and the freezing is performed.
  • the preset temperature threshold T02 of the compartment is -15 °C.
  • the temperature of the compartment of the freezing compartment is less than or equal to -15 °C, it means that the freezing compartment does not need to be cooled, otherwise the freezing compartment needs to be cooled. If the compartment temperature of the refrigerating compartment is less than or equal to 0 °C, The refrigerating compartment does not require refrigeration, whereas the refrigerating compartment requires refrigeration.
  • control method After determining the flow of the compartment and refrigerant to be cooled, the control method includes:
  • variable frequency compressor is controlled to operate at a first frequency.
  • the control method further includes:
  • control inverter compressor continues to operate at the first frequency.
  • “monitoring whether the room requiring refrigeration changes” is to monitor whether the refrigerator has new during operation.
  • the refrigeration compartment is closed after the refrigeration compartment is opened, and/or after reaching the target temperature, including but not limited to the following three conditions:
  • the total cooling capacity required for the compartment requiring cooling per unit time is recalculated.
  • the control of the inverter compressor is performed at the second frequency. The specific control method is referred to in the first embodiment, and details are not described herein.
  • the control method further includes:
  • the inverter compressor is controlled to operate at the third frequency.
  • the temperature in the refrigerator room will continuously decrease.
  • the total cooling capacity of the refrigerator will decrease accordingly. If the inverter compressor is operated at the first frequency, it will cause The amount of refrigeration generated by the compressor is excessive, resulting in an increase in power consumption. Therefore, in the present embodiment, after the predetermined time of operation of the inverter compressor, the total cooling capacity required for the room to be cooled per unit time is recalculated, thereby The frequency of the inverter compressor is controlled to be a third frequency according to the current total cooling capacity, and the third frequency is smaller than the first frequency.
  • the “predetermined time” in the present embodiment may be set according to different refrigerators and different working environments, such as 30 min, 1 h, and the like.
  • the refrigerator repeatedly calculates the total cooling capacity every predetermined time and updates the third frequency.
  • the total amount of refrigeration required for the compartment requiring refrigeration per unit time can also be calculated in real time, thereby controlling the frequency of the inverter compressor to be continuously reduced in real time.
  • the present invention effectively controls the power consumption by calculating the total cooling capacity required for the refrigerator compartment per unit time and adjusting the frequency of the inverter compressor under the condition of satisfying the refrigeration condition of the refrigerator.

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Abstract

一种采用变频压缩机的冰箱控制方法及控制系统，包括：计算单位时间内需要制冷的间室所需的总制冷量；将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；控制变频压缩机以第一频率运行。通过计算单位时间内冰箱间室所需的总制冷量，并调节变频压缩机的频率，在满足冰箱制冷条件情况下有效控制了耗电量。

Description

采用变频压缩机的冰箱控制方法及控制系统 技术领域
本发明涉及冰箱制冷控制技术领域，尤其涉及一种采用变频压缩机的冰箱控制方法及控制系统。
背景技术
冰箱通常包括多制冷系统冰箱(直冷冰箱)和单制冷系统冰箱(风冷冰箱)。多制冷系统包括多个用于制冷剂流通的制冷通路及与所有制冷通路相连的变频压缩机，每个制冷通路中均设有蒸发器；单制冷系统包括一个用于制冷剂流通的制冷通路及与制冷通路相连的变频压缩机，制冷通路中设有蒸发器。
应用多蒸发器的多制冷系统的冰箱，制冷剂在走不同的制冷通路时所需的热负荷是不一样的，从而需要的制冷量也不同，现有技术中变频压缩机控制制冷剂不管是走哪一个通路时，变频压缩机都用相同的输入频率，这样就会难免造成走某些制冷通路时变频压缩机所产生的制冷量过剩，从而导致耗电量的增加。
应用单蒸发器的单制冷系统的风冷冰箱，冷藏间室与冷冻间室之间一般有一贯通的风门，当冷藏间室需要制冷时风门打开，冷藏间室不需要制冷时风门关闭。冷藏风门打开状态下，变频压缩机提供的冷量需要满足冷藏和冷冻的制冷需求，风门关闭状态下，变频压缩机提供的冷量只需要满足冷冻间室的制冷需求。现有技术中变频压缩机控制不管风门处于打开或关闭状态，变频压缩机都用相同的输入频率，这样就会难免造成风门关闭状态下压缩机所产生的制冷量过剩，从而导致耗电量的增加。
发明内容
针对现有技术的不足，本发明解决的技术问题是提供一种采用变频压缩机的冰箱控制方法及控制系统，以控制变频压缩机的频率。
为解决上述技术问题，本发明的技术方案是这样实现的：
一种采用变频压缩机的冰箱控制方法，所述控制方法包括：
计算单位时间内需要制冷的间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以所述第一频率运行。
作为本发明的进一步改进，计算单位时间内需要制冷的间室所需的总制冷量具体包括：
计算单位时间内每个需要制冷的间室各个导热壁传导的热量，每个导热壁传导的热量计算公式为：
Φ＝λAΔT/δ，
其中，Φ为导热壁单位时间内传导的热量，A为导热壁面积，λ为导热壁的热导率，δ导热壁的厚度，ΔT导热壁两表面之间的温度差，即环境温度与间室温度之差；
计算每个需要制冷的间室各导热壁传导的热量之和，得到各个需要制冷的间室所需的制冷量；
计算各个需要制冷的间室所需的制冷量之和，得到总制冷量。
作为本发明的进一步改进，所述需要制冷的间室的判断方法具体为：
监测各间室内部的间室温度T；
分别将各间室内部的间室温度与各间室对应的预设间室温度阈值T0进行比较；
若间室温度T大于对应的预设间室温度阈值T0，则认为该间室需要制冷，若间室温度T小于或等于对应的预设间室温度阈值T0，则认为该间室不需要制冷。
作为本发明的进一步改进，所述控制方法还包括：
监测需要制冷的间室是否发生变化；
若是，重新计算单位时间内需要制冷的间室所需的总制冷量，将当前的总制冷量作为变频压缩机的第二功率，并计算变频压缩机在第二功率下运行时的第二频率，控制变频压缩机以所述第二频率运行；若否，控制变频压缩机继续以所述第一频率运行。
作为本发明的进一步改进，监测需要制冷的间室是否发生变化具体为：
监测单制冷系统风冷冰箱制冷回路中的风门状态是否改变。
作为本发明的进一步改进，监测需要制冷的间室是否发生变化具体为：
监测多制冷系统风冷冰箱各个制冷回路中的风门状态至少其中之一是否改变。
作为本发明的进一步改进，所述控制方法还包括：
在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量；
将当前的总制冷量作为变频压缩机的第三功率，并计算变频压缩机在第三功率下运行时的第三频率；
控制变频压缩机以所述第三频率运行。
相应地，一种采用变频压缩机的冰箱控制系统，所述控制系统包括温度监测装置和与所述温度监测装置相连的主控板，其中：
温度监测装置，包括
设于冰箱外部用于监测冰箱运行环境温度的第一温度监测装置、以及设于冰箱各间室内用于监测各间室内部的间室温度的若干第二温度监测装置；
主控板，用于
计算单位时间内需要制冷的间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以所述第一频率运行。
作为本发明的进一步改进，所述主控板还用于：
计算单位时间内每个需要制冷的间室各个导热壁传导的热量，每个导热壁传导的热量计算公式为：
Φ＝λAΔT/δ，
其中，Φ为导热壁单位时间内传导的热量，A为导热壁面积，λ为导热壁的热导率，δ导热壁的厚度，ΔT导热壁两表面之间的温度差，即环境温度与间室温度之差；
计算每个需要制冷的间室各导热壁传导的热量之和，得到各个需要制冷的间室所需的制冷量；
计算各个需要制冷的间室所需的制冷量之和，得到总制冷量。
作为本发明的进一步改进，所述主控板还用于：
分别将各间室内部的间室温度与各间室对应的预设间室温度阈值T0进行比较；
若间室温度T大于对应的预设间室温度阈值T0，则认为该间室需要制冷，若间室温度T小于或等于对应的预设间室温度阈值T0，则认为该间室不需要制冷。
作为本发明的进一步改进，所述主控板还用于：
监测需要制冷的间室是否发生变化；
若是，重新计算单位时间内需要制冷的间室所需的总制冷量，将当前的总制冷量作为变频压缩机的第二功率，并计算变频压缩机在第二功率下运行时的第二频率，控制变频压缩机以所述第二频率运行；若否，控制变频压缩机继续以所述第一频率运行。
作为本发明的进一步改进，所述主控板还用于监测单系统风冷冰箱制冷回路中的风门状态是否改变。
作为本发明的进一步改进，所述主控板还用于监测多系统风冷冰箱各个制冷回路中的风门状态至少其中之一是否改变。
作为本发明的进一步改进，所述主控板还用于：
在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量；
将当前的总制冷量作为变频压缩机的第三功率，并计算变频压缩机在第三功率下运行时的第三频率；
控制变频压缩机以所述第三频率运行。
本发明的有益效果是：
本发明通过计算单位时间内冰箱间室所需的总制冷量，并调节变频压缩机的频率，在满足冰箱制冷条件情况下有效控制了耗电量。
附图说明
图1为本发明第一实施方式中采用变频压缩机的冰箱控制方法流程图。
图2为本发明第一实施方式中采用变频压缩机的冰箱控制系统的模块示意图。
图3为本发明第一实施方式中需要制冷的间室的判断方法流程图。
图4为本发明第二实施方式中采用变频压缩机的冰箱控制方法流程图。
图5为本发明第三实施方式中采用变频压缩机的冰箱控制方法流程图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明的具体实施方式进行详细说明。这些优选实施方式的示例在附图中进行了例示。附图中所示和根据附图描述的本发明的实施方式仅仅是示例性的，并且本发明并不限于这些实施方式。
在此，还需要说明的是，为了避免因不必要的细节而模糊了本发明，在附图中仅仅示出了与本发明的方案密切相关的结构和/或处理步骤，而省略了与本发明关系不大的其他细节。
另外，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。
参图1所示，介绍本发明第一实施方式中采用变频压缩机的冰箱控制方法，该控制方法包括：
计算单位时间内需要制冷的间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以第一频率运行。
相应地，参图2所示，本实施方式中采用变频压缩机的冰箱控制系统，包括温度监测装置100和与温度监测装置100相连的主控板200，其中：
温度监测装置100，包括
设于冰箱外部用于监测冰箱运行环境温度的第一温度监测装置、以及设于冰箱各间室内用于监测各间室内部的间室温度的若干第二温度监测装置；
主控板200，用于
计算单位时间内需要制冷的间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以第一频率运行。
本发明中冰箱的热负荷与各间室所需的总制冷量相等，而冰箱各间室由导热壁(发泡层)围设而成，各间室所需的总制冷量即导热壁传导的总热量。为了维持变频压缩机在运行过程中既能满足冰箱的制冷条件，又不造成制冷量的浪费，本实施方式中维持单位时间内各间室的总制冷量与变频压缩机的瞬时功率相等。
其中，单位时间内总制冷量的计算包括以下步骤：
计算单位时间内每个需要制冷的间室各个导热壁传导的热量，每个导热壁传导的热量计算公式为：
Φ＝λAΔT/δ，
其中：Φ为导热壁单位时间内传导的热量(W)，A为导热壁面积(m2)，λ为导热壁的热导率[w/(m·K)]，δ导热壁的厚度(m)，ΔT导热壁两表面之间的温度差(℃)，即环境温度与间室温度之差；
计算每个需要制冷的间室各导热壁传导的热量之和，得到各个需要制冷的间室所需的制冷量；
计算各个需要制冷的间室所需的制冷量之和，得到总制冷量。
本实施方式中导热壁以平壁为例进行说明，利用上述公式Φ＝λAΔT/δ，可以计算每个间室各个导热壁单位时间内传导的热量，而所有导热壁单位时间内传导的热量之和即该间室单位时间内的制冷量，通常每个间室包括上、下、左、右、前、后共6个导热壁，6个导热壁传导的热量的总和即该制冷间室的制冷量。
应当理解的是，本实施方式中以每个间室6个导热壁为例进行说明，在其他实施方式中也可以设置其他数量的导热壁，在此不再举例进行说明。
另外，参图3所示，需要制冷的间室的判断方法具体为：
监测各间室内部的间室温度T；
分别将各间室内部的间室温度与各间室对应的预设间室温度阈值T0进行比较；
若间室温度T大于对应的预设间室温度阈值T0，则认为该间室需要制冷，若间室温度T小于或等于对应的预设间室温度阈值T0，则认为该间室不需要制冷。
本发明可应用于各种类型的冰箱中，如单制冷系统风冷冰箱、多制冷系统风冷冰箱、多制冷系统直冷冰箱等，以下结合具体实施例对本实施方式作进一步说明。
在本发明的第一实施例中，以单制冷系统风冷冰箱进行说明，该冰箱包括冷藏间室和冷冻间室两个间室，冷藏间室和冷冻间室之间设有用于控制冷藏间室制冷的风门。冰箱外部设有用于监测冰箱运行环境温度的第一温度监测装置，冰箱冷藏间室和冷冻间室内分别设有用于监测间室内部的间室温度的若干第二温度监测装置。
根据第二温度监测装置检测出的间室温度，与预设间室温度阈值进行比较，确定制冷回路中的风门状态，如在本实施例中设置冷藏间室的预设温度阈值T01为0℃，冷冻间室的预设温度阈值T02为-15℃。
若监测到冷冻间室的间室温度小于或等于-15℃，说明冷冻间室不需要制冷，则关闭变频压缩机，若监测到冷冻间室的间室温度大于-15℃，说明冷冻间室需要制冷，进一步监测冷藏间室内的间室温度，包括下述两种情况：
1、若监测到冷藏间室内的间室温度大于0℃，则打开风门，对冷冻间室和冷藏间室同时进行制冷。此时：
计算单位时间内冷藏间室和冷冻间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以第一频率运行。
2、若监测到冷藏间室内的间室温度小于或等于0℃，则关闭风门，仅对冷冻间室进行制冷。此时：
计算单位时间内冷冻间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以第一频率运行。
在本发明的第二实施例中，以多制冷系统风冷冰箱为例进行说明，该冰箱包括多个制冷 系统，每个制冷系统包括冷藏间室和冷冻间室两个间室，每个冷藏间室和冷冻间室之间设有用于控制冷藏间室制冷的风门。冰箱外部设有用于监测冰箱运行环境温度的第一温度监测装置，冷藏间室和冷冻间室内分别设有用于监测间室内部的间室温度的若干第二温度监测装置。
根据各冷冻间室内的间室温度，确定所需制冷的制冷系统，并进一步根据所需制冷的制冷系统中冷藏间室的间室温度，确定对应制冷系统中风门的状态，最后再计算单位时间内的总制冷量以控制变频压缩机的频率。每个制冷系统的控制方法与第一实施例相同，在此不再进行赘述。
在本发明的第三实施例中，以多制冷系统直冷冰箱为例进行说明，如该冰箱包括冷藏间室和冷冻间室两个间室，制冷剂分别流向冷藏间室和冷冻间室。冰箱外部设有用于监测冰箱运行环境温度的第一温度监测装置，冰箱冷藏间室和冷冻间室内分别设有用于监测间室内部的间室温度的第二温度监测装置。
根据第二温度监测装置检测出的间室温度，与预设间室温度阈值进行比较，确定制冷剂的流向，如在本实施例中设置冷藏间室的预设温度阈值T01为0℃，冷冻间室的预设温度阈值T02为-15℃。
若监测到冷冻间室的间室温度小于或等于-15℃，说明冷冻间室不需要制冷，反之则冷冻间室需要制冷，若监测到冷藏间室的间室温度小于或等于0℃，说明冷藏间室不需要制冷，反之则冷藏间室需要制冷。
在确定需要制冷的间室和制冷剂的流向之后，控制方法包括：
计算单位时间内冷藏间室和/或冷冻间室所需的总制冷量；
将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
控制变频压缩机以第一频率运行。
参图4所示，介绍本发明第二实施方式中采用变频压缩机的冰箱控制方法，该控制方法在第一实施方式之后还包括：
监测需要制冷的间室是否发生变化；
若是，重新计算单位时间内需要制冷的间室所需的总制冷量，将当前的总制冷量作为变频压缩机的第二功率，并计算变频压缩机在第二功率下运行时的第二频率，控制变频压缩机以所述第二频率运行；
若否，控制变频压缩机继续以所述第一频率运行。
其中，“监测需要制冷的间室是否发生变化”是为了监测冰箱是否在运行过程中有新的 制冷间室开启、和/或达到目标温度后有制冷间室关闭，其包括但不限于下述三种情况：
监测单制冷系统风冷冰箱中的风门状态是否发生变化；
监测多制冷系统风冷冰箱中是否有关闭和/或启动制冷回路，以及是否有风门状态发生变化；
监测多制冷系统制冷冰箱中制冷剂的流向是否发生变化。
如在第一至第三实施方式中，有新的制冷间室开启、和/或达到目标温度后有制冷间室关闭，则重新计算单位时间内需要制冷的间室所需的总制冷量以控制变频压缩机以所述第二频率运行，具体的控制方法详参第一实施方式，在此不再进行赘述。
参图5所示，介绍本发明第二实施方式中采用变频压缩机的冰箱控制方法，该控制方法在第一实施方式之后还包括：
在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量；
将当前的总制冷量作为变频压缩机的第三功率，并计算变频压缩机在第三功率下运行时的第三频率；
控制变频压缩机以所述第三频率运行。
具体地，当冰箱运行时，冰箱间室内的温度会不断下降，当间室内的温度下降后，冰箱的总制冷量会相应降低，此时若还以第一频率运行变频压缩机，则会造成压缩机所产生的制冷量过剩，从而导致耗电量的增加，因此，本实施方式中在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量，从而根据当前的总制冷量控制变频压缩机的频率为第三频率，该第三频率小于第一频率。
另外，本实施方式中的“预定时间”可以根据不同的冰箱、不同的工作环境进行设置，如可设置为30min、1h等。冰箱每隔该预定时间则重复计算一次总制冷量，并对第三频率进行更新。
应当理解的是，在本发明的其他实施方式中也可以实时计算单位时间内需要制冷的间室所需的总制冷量，从而实时地控制变频压缩机的频率不断减小。
由以上技术方案可以看出，本发明通过计算单位时间内冰箱间室所需的总制冷量，并调节变频压缩机的频率，在满足冰箱制冷条件情况下有效控制了耗电量。
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。
上文所列出的一系列的详细说明仅仅是针对本申请的可行性实施方式的具体说明，它们并非用以限制本申请的保护范围，凡未脱离本申请技艺精神所作的等效实施方式或变更均应包含在本申请的保护范围之内。

Claims (14)

  1. 一种采用变频压缩机的冰箱控制方法，其特征在于，所述控制方法包括：
    计算单位时间内需要制冷的间室所需的总制冷量；
    将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
    控制变频压缩机以所述第一频率运行。
  2. 如权利要求1所述的控制方法，其特征在于，计算单位时间内需要制冷的间室所需的总制冷量具体包括：
    计算单位时间内每个需要制冷的间室各个导热壁传导的热量，每个导热壁传导的热量计算公式为：
    Φ＝λAΔT/δ，
    其中，Φ为导热壁单位时间内传导的热量，A为导热壁面积，λ为导热壁的热导率，δ导热壁的厚度，ΔT导热壁两表面之间的温度差，即环境温度与间室温度之差；
    计算每个需要制冷的间室各导热壁传导的热量之和，得到各个需要制冷的间室所需的制冷量；
    计算各个需要制冷的间室所需的制冷量之和，得到总制冷量。
  3. 如权利要求1所述的控制方法，其特征在于，所述需要制冷的间室的判断方法具体为：
    监测各间室内部的间室温度T；
    分别将各间室内部的间室温度与各间室对应的预设间室温度阈值T0进行比较；
    若间室温度T大于对应的预设间室温度阈值T0，则认为该间室需要制冷，若间室温度T小于或等于对应的预设间室温度阈值T0，则认为该间室不需要制冷。
  4. 如权利要求3所述的控制方法，其特征在于，所述控制方法还包括：
    监测需要制冷的间室是否发生变化；
    若是，重新计算单位时间内需要制冷的间室所需的总制冷量，将当前的总制冷量作为变频压缩机的第二功率，并计算变频压缩机在第二功率下运行时的第二频率，控制变频压缩机以所述第二频率运行；若否，控制变频压缩机继续以所述第一频率运行。
  5. 如权利要求4所述的控制方法，其特征在于，监测需要制冷的间室是否发生变化具体为：
    监测单制冷系统风冷冰箱制冷回路中的风门状态是否改变。
  6. 如权利要求4所述的控制方法，其特征在于，监测需要制冷的间室是否发生变化具体为：
    监测多制冷系统风冷冰箱各个制冷回路中的风门状态至少其中之一是否改变。
  7. 如权利要求1所述的控制方法，其特征在于，所述控制方法还包括：
    在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量；
    将当前的总制冷量作为变频压缩机的第三功率，并计算变频压缩机在第三功率下运行时的第三频率；
    控制变频压缩机以所述第三频率运行。
  8. 一种采用变频压缩机的冰箱控制系统，其特征在于，所述控制系统包括温度监测装置和与所述温度监测装置相连的主控板，其中：
    温度监测装置，包括
    设于冰箱外部用于监测冰箱运行环境温度的第一温度监测装置、以及设于冰箱各间室内用于监测各间室内部的间室温度的若干第二温度监测装置；
    主控板，用于
    计算单位时间内需要制冷的间室所需的总制冷量；
    将总制冷量作为变频压缩机的第一功率，并计算变频压缩机在第一功率下运行时的第一频率；
    控制变频压缩机以所述第一频率运行。
  9. 如权利要求8所述的控制系统，其特征在于，所述主控板还用于：
    计算单位时间内每个需要制冷的间室各个导热壁传导的热量，每个导热壁传导的热量计算公式为：
    Φ＝λAΔT/δ，
    其中，Φ为导热壁单位时间内传导的热量，A为导热壁面积，λ为导热壁的热导率，δ导热壁的厚度，ΔT导热壁两表面之间的温度差，即环境温度与间室温度之差；
    计算每个需要制冷的间室各导热壁传导的热量之和，得到各个需要制冷的间室所需的制冷量；
    计算各个需要制冷的间室所需的制冷量之和，得到总制冷量。
  10. 如权利要求8所述的控制系统，其特征在于，所述主控板还用于：
    分别将各间室内部的间室温度与各间室对应的预设间室温度阈值T0进行比较；
    若间室温度T大于对应的预设间室温度阈值T0，则认为该间室需要制冷，若间室温度T小于或等于对应的预设间室温度阈值T0，则认为该间室不需要制冷。
  11. 如权利要求10所述的控制系统，其特征在于，所述主控板还用于：
    监测需要制冷的间室是否发生变化；
    若是，重新计算单位时间内需要制冷的间室所需的总制冷量，将当前的总制冷量作为变频压缩机的第二功率，并计算变频压缩机在第二功率下运行时的第二频率，控制变频压缩机以所述第二频率运行；若否，控制变频压缩机继续以所述第一频率运行。
  12. 如权利要求11所述的控制系统，其特征在于，所述主控板还用于监测单系统风冷冰箱制冷回路中的风门状态是否改变。
  13. 如权利要求11所述的控制系统，其特征在于，所述主控板还用于监测多系统风冷冰箱各个制冷回路中的风门状态至少其中之一是否改变。
  14. 如权利要求8所述的控制系统，其特征在于，所述主控板还用于：
    在变频压缩机运行预定时间之后，重新计算单位时间内需要制冷的间室所需的总制冷量；
    将当前的总制冷量作为变频压缩机的第三功率，并计算变频压缩机在第三功率下运行时的第三频率；
    控制变频压缩机以所述第三频率运行。
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