CN115574533A - Control method of refrigerating and freezing device and refrigerating and freezing device - Google Patents

Control method of refrigerating and freezing device and refrigerating and freezing device Download PDF

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Publication number
CN115574533A
CN115574533A CN202110687997.2A CN202110687997A CN115574533A CN 115574533 A CN115574533 A CN 115574533A CN 202110687997 A CN202110687997 A CN 202110687997A CN 115574533 A CN115574533 A CN 115574533A
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CN
China
Prior art keywords
freezing
temperature
temperature difference
evaporator
compartment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110687997.2A
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Chinese (zh)
Inventor
崔展鹏
朱小兵
陈建全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Refrigerator Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Refrigerator Co Ltd
Priority to CN202110687997.2A priority Critical patent/CN115574533A/en
Priority to EP22827273.8A priority patent/EP4361535A4/en
Priority to PCT/CN2022/093875 priority patent/WO2022267775A1/en
Publication of CN115574533A publication Critical patent/CN115574533A/en
Pending 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • 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
    • F25B2600/2501—Bypass 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/17—Speeds
    • F25B2700/173—Speeds of the evaporator fan
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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)

Abstract

The present invention relates to a method for controlling a refrigerating and freezing apparatus and a refrigerating and freezing apparatus. The refrigerating and freezing device comprises a box body and a refrigerating system, wherein a freezing chamber and at least one non-freezing chamber are limited in the box body, the refrigerating system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary tube and a freezing evaporator which are sequentially connected in series to form a loop, two ends of the freezing capillary tube are connected in parallel with at least one non-freezing branch, and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator which are connected in series. The control method of the invention comprises the following steps: when the refrigeration and freezing device is in a state of refrigerating any non-freezing chamber, acquiring the evaporator temperature of a freezing evaporator and the chamber temperature in the freezing chamber; calculating the temperature difference between the evaporator temperature and the room temperature; and selectively adjusting the operating frequency of the compressor according to the temperature difference so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range. The minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.

Description

Control method of refrigerating and freezing device and refrigerating and freezing device
Technical Field
The present invention relates to a refrigeration and freezing technology, and more particularly, to a method for controlling a refrigeration and freezing apparatus and a refrigeration and freezing apparatus.
Background
The humidity inside the refrigerating and freezing device can affect the speed of water evaporation of food materials, so that the quality of the food materials is affected. When the humidity is too low, the moisture of the food materials is evaporated quickly, so that the weight loss of the food materials is caused, and the problems of poor food storage effect, short food preservation period and the like are caused. Therefore, it is always an important research subject to moisturize a refrigerating and freezing device. However, most of the existing refrigerating and freezing devices humidify and moisturize the refrigerating chamber, and the problems of humidifying and moisturizing the freezing chamber are seldom concerned. In fact, the humidity of freezer is less, and the moisture loss of eating materials such as the meat of long-time storage in the freezer is serious, and it is poor to store the effect, not only can influence the taste of eating the material, but also can cause the loss of eating the material nutrition, influences user experience.
The few solutions in the prior art relating to the humidification of the freezer compartment are to add a very complex humidification device in the cold storage and freezing device. However, the temperature of the freezing chamber is low, the humidifying device is easy to generate frost and is blocked, and the humidifying device occupies the air duct space or the compartment space. Therefore, the existing solutions not only increase the cost and assembly difficulty of the refrigeration and freezing device, but also are very difficult to be applied in practice, so that the problem of low humidity of the freezing chamber cannot be solved practically.
In the course of research into the technical problem of how to maintain or increase the humidity in a freezer compartment, the applicant has recognized that humidifying or moisturizing a freezer compartment may affect the temperature in the freezer compartment, which increases the design difficulty of humidifying or moisturizing the freezer compartment to some extent.
Disclosure of Invention
It is an object of a first aspect of the present invention to overcome at least one of the drawbacks of the prior art and to provide a method for controlling a refrigeration and freezing apparatus that avoids a low humidity in a freezing compartment without significantly affecting the compartment temperature in the freezing compartment.
It is a further object of the first aspect of the invention to improve the feasibility of practical application of a refrigeration chiller.
A second aspect of the present invention is to provide a refrigeration and freezing apparatus capable of avoiding a low humidity in a freezing compartment without greatly affecting the compartment temperature in the freezing compartment.
According to a first aspect of the invention, the invention provides a control method of a refrigerating and freezing device, the refrigerating and freezing device comprises a box body and a refrigerating system, a freezing chamber and at least one non-freezing chamber are defined in the box body, the refrigerating system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary tube and a freezing evaporator which are sequentially connected in series to form a loop, two ends of the freezing capillary tube are connected in parallel with at least one non-freezing branch for respectively providing cold energy for the at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator which are connected in series; the control method comprises the following steps:
when the refrigeration and freezing device is in a state of refrigerating any non-freezing compartment, acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference between the evaporator temperature and the compartment temperature; and
selectively adjusting an operating frequency of the compressor according to the temperature difference such that a temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein
And the minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.
Optionally, the step of selectively adjusting the operating frequency of the compressor according to the temperature difference comprises:
when the temperature difference is larger than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, the running frequency of the compressor is increased;
when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reducing the running frequency of the compressor;
and when the temperature difference is within the preset temperature difference range, keeping the running frequency of the compressor unchanged.
Optionally, the refrigeration and freezing device further comprises a freezing fan for causing the cooling air flow generated by the freezing evaporator to flow to the freezing chamber when the freezing chamber is refrigerated; the control method further comprises the following steps:
when the temperature difference is larger than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, controlling the freezing fan to be in a stop state;
when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is in the preset temperature difference range, the freezing fan is controlled to be in an operating state.
Optionally, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the rotating speed of the freezing fan is less than the set rotating speed of the freezing fan when the cold storage and refrigeration device is in a refrigeration state of the refrigeration chamber.
Optionally, the control method further includes:
when the temperature in the non-freezing chamber in the refrigerating state reaches the set temperature of the non-freezing chamber, if the temperature of the chamber in the freezing chamber is higher than the set temperature of the freezing chamber, the electromagnetic valve is controlled to be switched to the refrigerating state of the freezing chamber, and the operating frequency of the compressor is restored to the preset operating frequency for refrigerating the freezing chamber.
Optionally, when the temperature difference is less than or equal to a minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor is between a minimum operating frequency of the compressor and a set operating frequency of the compressor when the refrigeration and freezing device is in a freezing compartment refrigerating state.
Optionally, the preset temperature difference range is any temperature difference value between 1 ℃ and 3 ℃.
Optionally, the at least one non-freezing compartment comprises a refrigerated compartment, the at least one non-freezing branch comprises a refrigerated branch, the non-freezing capillary tube comprises a refrigerated capillary tube, and the non-freezing evaporator comprises a refrigerated evaporator; and/or
The at least one non-freezing chamber comprises a variable-temperature chamber, the at least one non-freezing branch comprises a variable-temperature branch, the non-freezing capillary comprises a variable-temperature capillary, and the non-freezing evaporator comprises a variable-temperature evaporator.
According to a second aspect of the present invention, there is also provided a refrigeration freezer comprising:
the refrigerator comprises a box body, a refrigerating chamber and at least one non-refrigerating chamber are defined in the box body;
the refrigerating system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary and a freezing evaporator which are sequentially connected in series to form a loop, wherein two ends of the freezing capillary are connected in parallel with at least one non-freezing branch for respectively providing cold energy for at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary and a non-freezing evaporator which are connected in series; and
a control apparatus comprising a processor and a memory, the memory having stored therein a machine executable program, and the machine executable program when executed by the processor being for implementing the control method of any of the aspects.
Optionally, the refrigeration and freezing apparatus further comprises:
freezing fan for make during freezing room refrigeration the cooling air flow that freezing evaporimeter produced flows to freezing room, and configure into the evaporimeter temperature of freezing evaporimeter department with be in the stop state when the difference in temperature between the indoor room temperature of freezing room is more than or equal to the maximum difference in temperature endpoint value of presetting the difference in temperature scope, the difference in temperature is less than or equal to the minimum difference in temperature endpoint value of presetting the difference in temperature scope perhaps the difference in temperature is in the running state when presetting the difference in temperature within range.
The refrigerating and freezing device is particularly provided with a preset temperature difference range, and the minimum temperature difference endpoint value of the preset temperature difference range is more than or equal to zero. During the non-freezing compartment refrigeration period, the operation frequency of the compressor is adjusted according to the temperature difference between the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment, so that the temperature difference between the evaporator temperature and the compartment temperature is in the preset temperature difference range. Thereby, it is ensured that the compartment temperature in the freezer compartment is suitably higher than the evaporator temperature of the freezer evaporator within the preset temperature difference range, while satisfying the non-freezer compartment refrigeration demand. At the moment, external water vapor entering the freezing chamber through the door seal and moisture in the freezing chamber (such as moisture volatilized by food materials) can be condensed in the freezing chamber with lower temperature instead of being condensed at the freezing evaporator, so that on one hand, the moisture content in the freezing chamber is effectively increased, the humidity in the freezing chamber is increased, and the food material storage effect is prevented from being influenced by the lower humidity in the freezing chamber; on the other hand, the temperature of the freezing evaporator is not too high, and the phenomenon that the freezing effect is influenced because the temperature in the freezing chamber is greatly increased due to the too high temperature of the freezing evaporator is avoided.
Moreover, on the basis of the original structure of the refrigerating and freezing device, the humidification and humidification effect on the freezing chamber is realized by controlling the running frequency of the compressor on the premise of not greatly influencing the temperature of the freezing chamber, and no auxiliary structure is required to be added, so that the original structure and the storage capacity of the refrigerating and freezing device are not influenced, and the feasibility of practical application is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a refrigeration system of a refrigeration chiller according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method of controlling a refrigeration chiller according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a method of controlling a refrigeration chiller according to another embodiment of the present invention;
fig. 5 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention;
fig. 6 is a schematic block diagram of a refrigeration system according to another embodiment of the present invention;
fig. 7 is a schematic block diagram of a refrigeration system according to still another embodiment of the present invention;
fig. 8 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention provides a method for controlling a refrigeration and freezing apparatus, fig. 1 is a schematic structural diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a refrigeration system of a refrigeration and freezing apparatus according to an embodiment of the present invention.
Referring to fig. 1 and 2, a refrigeration and freezing apparatus 1 includes a cabinet 10 and a refrigeration system 20, the cabinet 10 defining a freezing compartment 11 and at least one non-freezing compartment therein. It is understood that the freezing compartment 11 is a compartment for freezing and the non-freezing compartment is a compartment for non-freezing, e.g. the non-freezing compartment may be a compartment for cold storage or temperature change. Normally, the temperature in the non-freezing compartment is higher than the temperature in the freezing compartment 11.
The refrigerating system 20 comprises a compressor 21, a condenser 22, an electromagnetic valve 23, a freezing capillary tube 24 and a freezing evaporator 25 which are sequentially connected in series to form a loop, wherein two ends of the freezing capillary tube 24 are connected in parallel with at least one non-freezing branch for respectively providing cold energy for the at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator which are connected in series. In the present invention, the series and parallel are referred to as physical series and parallel of refrigerant flow paths, respectively, rather than series and parallel of circuit configurations.
When the refrigeration and freezing apparatus 1 is in a state in which the non-freezing compartment is cooled, the solenoid valve 23 is set in a state in which the condenser 22 and the non-freezing branch corresponding to the non-freezing compartment are in communication with each other, and at this time, the refrigerant flowing out of the compressor 21 passes through the condenser 22, the solenoid valve 23, the non-freezing evaporator and the non-freezing capillary tube of the non-freezing branch, and the freezing evaporator 25 in this order, and finally returns to the compressor 21. When the refrigerating and freezing apparatus 1 is in a state in which the freezing compartment is refrigerated, the solenoid valve 23 is set in a state in which the condenser 22 and the freezing capillary tube 24 are communicated, and at this time, the refrigerant flowing out of the compressor 21 passes through the condenser 22, the solenoid valve 23, the freezing capillary tube 24, and the freezing evaporator 25 in this order, and finally returns to the compressor 21.
The applicant has realised that the freezer compartment 11 is not an absolutely closed compartment. Air carrying moisture from the outside can enter the freezing chamber 11 through the door seal of the freezing chamber 11; the food material inside the freezing compartment 11 that is not frozen will volatilize certain moisture; after the food material in the freezing chamber 11 is frozen, a small amount of water on the surface of the food material is sublimated; the frost formed on the surface of the freezing evaporator 25 is also sublimated a little. That is, the refrigerating and freezing device 1 inherently has a plurality of moisture sources that can be used for moisturizing or humidifying the freezing compartment 11. If this moisture can be effectively used to humidify or humidify the freezing compartment 11, it is not necessary to provide any other humidifying device at all.
The applicant has further realised that with an air-cooled refrigeration and freezing apparatus 1 there is very little condensation within the storage compartment, which occurs substantially at the evaporator. This is because the temperature of the evaporator is generally lower than the temperature of the storage compartment. That is, moisture will generally collect and condense at cooler locations. Then, if the compartment temperature in the freezing compartment 11 is lower than the evaporator temperature at the freezing evaporator 25, moisture accumulates in the freezing compartment 11, and it is possible to effectively moisturize the freezing compartment 11 or increase the humidity in the freezing compartment.
However, if the evaporator temperature at the freezing evaporator 25 is too high, the heat at the freezing evaporator 25 is transferred to the freezing compartment 11 to raise the temperature in the freezing compartment 11, thereby affecting the freezing effect of the freezing compartment 11. More importantly, the temperature in the freezing compartment 11 is constantly dynamically changing during the non-freezing compartment cooling, and therefore, if the freezing compartment 11 is to be effectively moisturized or humidified for a long period of time, it is necessary to ensure that the evaporator temperature of the freezing evaporator 25 is always slightly higher than the compartment temperature of the freezing compartment 11. That is, it is necessary to control the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature inside the freezing compartment 11.
To this end, the invention proposes, in particular, a method for controlling a refrigeration-freezing apparatus, the method comprising:
when the refrigeration and freezing device 1 is in a state of refrigerating any non-freezing chamber, acquiring the evaporator temperature of the freezing evaporator 25 and the chamber temperature in the freezing chamber 11;
calculating the temperature difference between the evaporator temperature and the room temperature; and
selectively adjusting the operating frequency of the compressor 21 according to the temperature difference such that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein
The minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.
It is understood that the preset temperature difference range has a maximum temperature difference endpoint value and a minimum temperature difference endpoint value, the maximum temperature difference endpoint value being greater than the minimum temperature difference endpoint value.
In order to maintain the humidity in the freezing compartment 11 or increase the humidity in the freezing compartment 11, and to avoid excessive temperature rise in the freezing compartment 11, the refrigeration and freezing apparatus 1 of the present invention is particularly provided with a preset temperature difference range, and the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 is directly monitored, and the minimum temperature difference endpoint of the preset temperature difference range is greater than or equal to zero. During non-freezing compartment refrigeration, the operating frequency of the compressor 21 is adjusted according to the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 so that the temperature difference between the evaporator temperature and the compartment temperature is within the above-mentioned preset temperature difference range. This ensures that the compartment temperature in the freezing compartment 11 is always appropriately higher than the evaporator temperature of the freezing evaporator 25 within the preset temperature difference range, while satisfying the cooling demand of the non-freezing compartment 11. At this time, the external water vapor entering the freezing compartment 11 through the door seal and the moisture in the freezing compartment 11 (for example, moisture volatilized from the food material, moisture sublimated from the surface of the frozen food material, and the like) are condensed in the freezing compartment 11 with a lower temperature instead of being condensed at the freezing evaporator 25, so that on one hand, the moisture content in the freezing compartment 11 is effectively increased, the humidity in the freezing compartment 11 is increased, and the food material preservation effect is prevented from being influenced by the lower humidity in the freezing compartment 11; on the other hand, the temperature of the freezing evaporator 25 is not too high, so that the freezing effect is prevented from being influenced by the temperature in the freezing chamber 11 greatly rising due to the too high temperature of the freezing evaporator 25.
Moreover, on the basis of the original structure of the refrigerating and freezing device 1, the effect of humidifying and preserving the freezing chamber 11 on the premise of not greatly influencing the temperature of the freezing chamber 11 is realized by controlling the operating frequency of the compressor 21, and no auxiliary structure is required to be added, so that the original structure and the storage capacity of the refrigerating and freezing device 1 are not influenced, and the feasibility of practical application is improved. The scheme for realizing humidification and moisture preservation of the freezing compartment 11 is completely different from the scheme adopted in the prior art, the design idea is novel, the effect is obvious, and the practical application prospect is good.
Fig. 3 is a schematic flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention, and referring to fig. 3, the control method of the present invention includes:
step S10, acquiring the current state of the refrigerating and freezing device 1;
step S20, judging whether the refrigerating and freezing device 1 is in a non-freezing chamber refrigerating state; if yes, go to step S30, if no, return to step S10; and
step S30, acquiring an evaporator temperature of the freezing evaporator 25 and a compartment temperature in the freezing compartment 11;
s40, calculating the temperature difference between the evaporator temperature and the room temperature; and
step S50, selectively adjusting the operating frequency of the compressor 21 according to the temperature difference, so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range.
It should be noted that, unless otherwise specified, the temperature difference in the present invention refers to the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11.
In some embodiments, the step of selectively adjusting the operating frequency of the compressor based on the temperature difference may specifically include:
when the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is increased;
when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reducing the operating frequency of the compressor 21;
the operating frequency of the compressor 21 is maintained constant when the temperature difference is within the preset temperature difference range.
Specifically, if the temperature difference is greater than or equal to the maximum temperature difference endpoint of the preset temperature difference range, it indicates that the evaporator temperature of the refrigeration evaporator 25 is too high, and the compartment temperature in the refrigeration compartment 11 may be seriously affected. Therefore, the present invention properly reduces the evaporator temperature of the freezing evaporator 25 to be within a preset temperature difference range from the compartment temperature in the freezing compartment 11 by increasing the operating frequency of the compressor 21. Meanwhile, the refrigeration efficiency of the non-freezing chamber can be improved.
If the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, it indicates that the evaporator temperature of the freezing evaporator 25 is close to or lower than the temperature of the compartment in the freezing compartment 11, and the external water vapor entering the freezing compartment 11 through the door seal and the water in the freezing compartment 11 are condensed at the freezing evaporator 25 with lower temperature, so that the purpose of moisturizing or humidifying the freezing compartment 11 cannot be achieved. Therefore, the present invention properly increases the evaporator temperature of the freezing evaporator 25 to be within a preset temperature difference range from the compartment temperature in the freezing compartment 11 by reducing the operating frequency of the compressor 21.
If the temperature difference is within the preset temperature difference range, it means that the evaporator temperature of the refrigeration evaporator 25 is appropriately higher than the compartment temperature in the refrigeration compartment 11, which not only does not have a great influence on the temperature in the refrigeration compartment 11, but also ensures that the external water vapor entering the refrigeration compartment 11 through the door seal and the water in the refrigeration compartment 11 are collected in the refrigeration compartment 11 with a lower temperature, thereby achieving the purpose of moisturizing or humidifying the refrigeration compartment 11. At this time, the present invention does not adjust the operation frequency of the compressor 21, so that the non-freezing compartment has relatively high refrigerating efficiency.
Fig. 4 is a schematic flow chart of a control method of a refrigeration and freezing apparatus according to another embodiment of the present invention, and referring to fig. 4, the step S50 may specifically include:
step S511, judging whether the temperature difference is larger than or equal to the maximum temperature difference endpoint value of a preset temperature difference range; if yes, go to step S512, otherwise go to step S513;
step S512, increasing the running frequency of the compressor 21;
step S513, judging whether the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range; if yes, go to step S514, otherwise go to step S515;
step S514, reducing the operating frequency of the compressor 21;
step S515 is to keep the operating frequency of the compressor 21 unchanged.
Of course, in step S50 of some alternative embodiments, the temperature difference may be compared with the minimum temperature difference endpoint value of the preset temperature difference range first, and then compared with the maximum temperature difference endpoint value of the preset temperature difference range.
In some embodiments, the refrigeration freezer 1 further comprises a freezer fan 30 for causing a flow of cooling air generated by the freezer evaporator 25 to flow to the freezer compartment 11 when the freezer compartment 11 is refrigerated. In these embodiments, the control method of the present invention further includes:
when the temperature difference is greater than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, controlling the freezing fan 30 to be in a stop state;
and when the temperature difference is less than or equal to the minimum temperature difference end point value of the preset temperature difference range or the temperature difference is within the preset temperature difference range, controlling the refrigerating fan 30 to be in the running state.
That is, if the evaporator temperature of the freezing evaporator 25 is too high, the freezing fan 30 is not operated to avoid the temperature in the freezing compartment 11 from rising due to a large amount of air flow with a high temperature at the freezing evaporator 25 flowing to the freezing compartment 11. If the evaporator temperature of the freezing evaporator 25 is close to, lower than or properly higher than the compartment temperature in the freezing compartment 11, the operation of the freezing fan 30 is controlled in the present invention, on one hand, the temperature of the air flow sent into the freezing compartment 11 driven by the freezing fan 30 is not high, and will not have a large influence on the compartment temperature in the freezing compartment 11, and on the other hand, the water vapor formed by partial frost sublimation on the surface of the freezing evaporator 25 can enter the freezing compartment 11 at a fast speed under the urging action of the freezing fan 30, so that the water increase speed in the freezing compartment 11 is increased, and the humidification rate of the freezing compartment 11 is increased. The invention abandons the design concept that the refrigerating fan 30 is normally stopped during the refrigeration of the non-refrigerating compartment in the prior art, the design idea is very novel, and the obtained humidifying effect is very obvious.
Fig. 5 is a schematic flow chart of a control method of a refrigeration and freezing apparatus according to another embodiment of the present invention, referring to fig. 5, in still another embodiment, the step S50 may specifically include:
step S521, judging whether the temperature difference is larger than or equal to the maximum temperature difference endpoint value of a preset temperature difference range; if yes, go to step S522, otherwise go to step S523;
step S522, increasing the operating frequency of the compressor 21, and controlling the freezing fan 30 to be in a stopped state;
step S523, judging whether the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range; if yes, go to step S524, otherwise go to step S525;
step S524, reducing the operating frequency of the compressor 21, and controlling the refrigerating fan 30 to be in an operating state;
step S525 is performed to keep the operation frequency of the compressor 21 unchanged and control the refrigerating fan 30 to be in an operation state.
Since the purpose of the operation of the freezing fan 30 during non-freezing compartment cooling is to promote the rapid entry of the water vapor formed by sublimation of part of the frost on the freezing evaporator 25 into the freezing compartment 11, rather than to convey the air flow to the freezing compartment 11, the rotational speed of the freezing fan 30 does not need to be large.
To this end, in some embodiments, when the temperature difference is less than or equal to the minimum temperature difference endpoint of the preset temperature difference range or the temperature difference is within the preset temperature difference range, the rotation speed of the freezing fan 30 is less than the set rotation speed of the freezing fan 30 when the refrigeration-freezing apparatus 1 is in the freezing compartment cooling state. Therefore, the water vapor formed by sublimation of part of the frost on the freezing evaporator 25 can be quickly sent into the freezing chamber 11, and the influence of too much temperature rise in the freezing chamber 11 to the freezing effect of the freezing chamber 11 caused by too much temperature rise in the freezing chamber 11 can be avoided.
In some embodiments, the control method of the present invention further comprises:
when the temperature in the non-freezing compartment in the cooling state reaches the set temperature of the non-freezing compartment, if the compartment temperature in the freezing compartment 11 is higher than the set temperature of the freezing compartment 11, the control solenoid valve 23 is switched to the cooling state of the freezing compartment 11, and the operating frequency of the compressor 21 is returned to the preset operating frequency for cooling the freezing compartment 11, so that the freezing compartment 11 reaches the set temperature quickly.
As the refrigeration requirements of the non-freezing compartment need to be met during the refrigeration of the non-freezing compartment. Therefore, the operating frequency of the compressor 21 cannot be too low.
To this end, in some embodiments, when the temperature difference is less than or equal to the minimum temperature difference endpoint of the preset temperature difference range, the operating frequency of the compressor 21 is between the lowest operating frequency of the compressor 21 and the set operating frequency of the compressor 21 when the refrigeration freezer 1 is in the freezer compartment cooling state. This makes it possible to appropriately set the evaporator temperature of the freezing evaporator 25 higher than the compartment temperature in the freezing compartment 11 while satisfying the cooling demand of the non-freezing compartment, thereby achieving the purpose of moisturizing or humidifying the freezing compartment 11.
Further, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is 3-17 Hz lower than the set operating frequency. That is, the operation frequency of the compressor 21 is appropriately lowered so that the evaporator temperature of the freezing evaporator 25 is slightly higher than the temperature in the freezing compartment 11, the cooling efficiency and the cooling effect of the non-freezing compartment are ensured to the maximum, and the temperature in the freezing compartment 11 is prevented from rising too much to the maximum extent. And, the compressor 21 is operated at the operating frequency within this range so that the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 is relatively stably maintained within the preset temperature difference range.
For example, during non-freezing compartment refrigeration, the operating frequency of the compressor 21 may be 3, 5, 7, 9, 11, 13, 15, or 17 hertz lower than the operating frequency of the compressor 21 during freezing compartment refrigeration.
Preferably, when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor 21 is 8 to 12 hz lower than the set operating frequency of the compressor 21. This makes the refrigerating efficiency and refrigerating effect of the non-freezing compartment and the moisturizing and humidifying effect of the freezing compartment 11 better.
In some embodiments, the predetermined temperature difference range may be any temperature difference value between 1 ℃ and 3 ℃. For example, the evaporator temperature of the freeze evaporator 25 may be 1 ℃, 2 ℃, or 3 ℃ higher than the compartment temperature within the freezer compartment 11. The temperature difference value within this range can ensure that the freezing compartment 11 has a good moisturizing and humidifying effect, and can prevent the compartment temperature in the freezing compartment 11 from rising too much and too fast to the maximum extent.
In some embodiments, the at least one non-freezing compartment may comprise the refrigerated compartment 12, the at least one non-freezing branch may comprise the refrigerated branch 201, the non-freezing capillary may comprise the refrigerated capillary 26, and the non-freezing evaporator may comprise the refrigerated evaporator 27. During the cooling of the refrigerating compartment 12, the freezing compartment 11 is moisturized or humidified by reducing the operating frequency of the compressor 21.
Fig. 6 is a schematic configuration block diagram of a refrigeration system according to another embodiment of the present invention. In other embodiments, the at least one non-freezing compartment may include a temperature-changing compartment 13, the at least one non-freezing branch may include a temperature-changing branch 202, the non-freezing capillary may include a temperature-changing capillary 28, and the non-freezing evaporator may include a temperature-changing evaporator 29. During the cooling of the temperature-variable compartment 13, the freezing compartment 11 is moisturized or humidified by reducing the operating frequency of the compressor 21.
Fig. 7 is a schematic configuration block diagram of a refrigeration system according to still another embodiment of the present invention. In still other embodiments, the number of non-freezing compartments may be two, namely the refrigerating compartment 12 and the temperature-changing compartment 13. The number of the non-freezing branches is two, and the two branches are respectively a refrigerating branch 201 and a temperature changing branch 202. The number of non-freezing capillaries is two, namely a refrigerating capillary 26 and a temperature-changing capillary 28. The number of the non-freezing evaporators is two, namely a refrigerating evaporator 27 and a temperature-changing evaporator 29. During the cooling of either the cold storage compartment 12 or the variable temperature compartment 13, the freezing compartment 11 is moisturized or humidified by reducing the operating frequency of the compressor 21.
The invention also provides a refrigerating and freezing device, and fig. 8 is a schematic structural block diagram of the refrigerating and freezing device according to one embodiment of the invention. Referring to fig. 1, 2 and 8, the refrigeration and freezing apparatus 1 of the present invention includes a cabinet 10, a refrigeration system 20 and a control device 40.
The cabinet 10 defines a freezing compartment 11 and at least one non-freezing compartment therein.
The refrigerating system 20 comprises a compressor 21, a condenser 22, an electromagnetic valve 23, a freezing capillary 24 and a freezing evaporator 25 which are sequentially connected in series to form a loop, wherein two ends of the freezing capillary 24 are connected in parallel with at least one non-freezing branch for respectively providing cold energy for the at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary and a non-freezing evaporator which are connected in series.
The control device 40 comprises a processor 41 and a memory 42, the memory 42 having a machine executable program 43 stored therein, and the machine executable program 43 being executable by the processor 41 for implementing the control method described in any of the above embodiments.
The refrigeration and freezing device 1 of the invention directly monitors the temperature difference between the evaporator temperature of the freezing evaporator 25 and the compartment temperature in the freezing compartment 11, effectively improves the moisture content in the freezing compartment 11, improves the humidity in the freezing compartment 11, and avoids the influence on the food material preservation effect caused by the lower humidity in the freezing compartment 11. In addition, the temperature of the freezing evaporator 25 is not too high, thereby avoiding the problem that the freezing effect is influenced because the temperature in the freezing chamber 11 is greatly increased due to the too high temperature of the freezing evaporator 25.
Specifically, the processor 41 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The processor 41 transceives data through the communication interface. The memory 44 is used to store programs executed by the processor 41. The memory 44 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, or a combination of memories. The machine-executable program 43 described above may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network) to a computer or external storage device.
In some embodiments, the refrigeration freezer 1 further comprises a freezer fan 30. The freezing fan 30 is configured to cause a cooling airflow generated by the freezing evaporator 25 to flow to the freezing compartment 11 when the freezing compartment 11 is refrigerating, and is configured to be in a stopped state when a temperature difference between the evaporator temperature at the freezing evaporator 25 and the compartment temperature in the freezing compartment 11 is greater than or equal to a maximum temperature difference end point value of a preset temperature difference range, and to be in an operating state when an upper temperature rise difference is less than or equal to a minimum temperature difference end point value of the preset temperature difference range or an ascending temperature difference is within the preset temperature difference range. Therefore, the moisture at the freezing evaporator 25 can be selectively and quickly caused to enter the freezing compartment 11 by the freezing fan 30, the humidification efficiency of the freezing compartment 11 is improved, and meanwhile, the temperature in the freezing compartment 11 is prevented from rising due to the fact that a large amount of air flow with high temperature at the freezing evaporator 25 flows to the freezing compartment 11.
Specifically, the freezing fan 30 is electrically connected to the control device 40 to operate under the control of the control device 40.
It will be appreciated by those skilled in the art that the refrigerated freezing apparatus 1 of the present invention includes not only refrigerators but also freezers, freezers or other suitable refrigerated freezing apparatus.
Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications which are consistent with the principles of this invention may be determined or derived directly from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A control method of a refrigerating and freezing device comprises a box body and a refrigerating system, wherein a freezing chamber and at least one non-freezing chamber are limited in the box body, the refrigerating system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary tube and a freezing evaporator which are sequentially connected in series to form a loop, two ends of the freezing capillary tube are connected in parallel with at least one non-freezing branch for respectively providing cold energy for the at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator which are connected in series; the control method comprises the following steps:
when the refrigeration and freezing device is in a state of refrigerating any non-freezing compartment, acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference between the evaporator temperature and the compartment temperature; and
selectively adjusting the operating frequency of the compressor according to the temperature difference so that the temperature difference between the evaporator temperature and the compartment temperature is within a preset temperature difference range; wherein
And the minimum temperature difference endpoint value of the preset temperature difference range is greater than or equal to zero.
2. The control method of claim 1, wherein selectively adjusting the operating frequency of the compressor based on the temperature differential comprises:
when the temperature difference is larger than or equal to the maximum temperature difference endpoint value of the preset temperature difference range, improving the running frequency of the compressor;
when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, reducing the running frequency of the compressor;
and when the temperature difference is within the preset temperature difference range, keeping the running frequency of the compressor unchanged.
3. The control method of claim 2, the refrigeration freezer further comprising a freezer fan for causing a flow of cooling air generated by the freezer evaporator to the freezer compartment while the freezer compartment is refrigerating; the control method further comprises the following steps:
when the temperature difference is larger than or equal to the maximum temperature difference end point value of the preset temperature difference range, controlling the freezing fan to be in a stop state;
when the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range or the temperature difference is in the preset temperature difference range, the refrigerating fan is controlled to be in an operating state.
4. The control method according to claim 3, wherein
When the difference in temperature is less than or equal to the minimum difference in temperature endpoint value of preset difference in temperature scope or the difference in temperature is in when presetting the difference in temperature within range, freezing fan's rotational speed is less than freezing fan is in the settlement rotational speed when cold-stored freezer is in freezing room refrigerating state.
5. The control method according to claim 1, further comprising:
when the temperature in the non-freezing chamber in the refrigerating state reaches the set temperature of the non-freezing chamber, if the temperature of the chamber in the freezing chamber is higher than the set temperature of the freezing chamber, the electromagnetic valve is controlled to be switched to the refrigerating state of the freezing chamber, and the operating frequency of the compressor is restored to the preset operating frequency for refrigerating the freezing chamber.
6. The control method according to claim 1, wherein
When the temperature difference is less than or equal to the minimum temperature difference endpoint value of the preset temperature difference range, the operating frequency of the compressor is between the minimum operating frequency of the compressor and the set operating frequency of the compressor when the refrigeration and freezing device is in a refrigeration state of a freezing chamber.
7. The control method according to claim 1, wherein
The preset temperature difference range is any temperature difference value between 1 and 3 ℃.
8. The control method according to claim 1, wherein
The at least one non-freezing compartment comprises a refrigerated compartment, the at least one non-freezing branch comprises a refrigerated branch, the non-freezing capillary tube comprises a refrigerated capillary tube, and the non-freezing evaporator comprises a refrigerated evaporator; and/or
The at least one non-freezing chamber comprises a variable-temperature chamber, the at least one non-freezing branch comprises a variable-temperature branch, the non-freezing capillary comprises a variable-temperature capillary, and the non-freezing evaporator comprises a variable-temperature evaporator.
9. A refrigeration freezer apparatus comprising:
the refrigerator comprises a box body, a refrigerating chamber and at least one non-refrigerating chamber are defined in the box body;
the refrigeration system comprises a compressor, a condenser, an electromagnetic valve, a freezing capillary tube and a freezing evaporator which are sequentially connected in series to form a loop, wherein two ends of the freezing capillary tube are connected in parallel with at least one non-freezing branch for respectively providing cold energy for the at least one non-freezing chamber, and each non-freezing branch comprises a non-freezing capillary tube and a non-freezing evaporator which are connected in series; and
control apparatus comprising a processor and a memory, the memory having stored therein a machine executable program, and the machine executable program when executed by the processor being for implementing a control method according to any one of claims 1 to 8.
10. The refrigeration freezer of claim 9, further comprising:
freezing fan, be used for make during the refrigeration room the cooling air current flow direction that freezing evaporimeter produced freezing room, and configure into the evaporimeter temperature of freezing evaporimeter department with the difference in temperature between the indoor room temperature of freezing room is in the inactive state when the biggest difference in temperature endpoint value that is more than or equal to the preset difference in temperature scope, the difference in temperature less than or equal to the minimum difference in temperature endpoint value of preset difference in temperature scope or the difference in temperature is in the running state when presetting the difference in temperature scope.
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JP2000146400A (en) * 1998-11-10 2000-05-26 Toshiba Corp Refrigerator
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