CN114777379A - Refrigerator and refrigerator control method - Google Patents

Refrigerator and refrigerator control method Download PDF

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Publication number
CN114777379A
CN114777379A CN202210364574.1A CN202210364574A CN114777379A CN 114777379 A CN114777379 A CN 114777379A CN 202210364574 A CN202210364574 A CN 202210364574A CN 114777379 A CN114777379 A CN 114777379A
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China
Prior art keywords
temperature
compressor
preset
limit value
refrigerator
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Granted
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CN202210364574.1A
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Chinese (zh)
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CN114777379B (en
Inventor
杨军
赵兴
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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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
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/02—Timing
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention discloses a refrigerator and a refrigerator control method, wherein the refrigerator comprises the following steps: the compressor is used for providing power for refrigeration; a temperature sensor for detecting a temperature of the refrigerating compartment and a temperature of the freezing compartment; the controller is used for judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not when the heat load is put into the freezing chamber and the compressor is started for the first time; if not, taking out the heat load and improving the running frequency of the compressor; after a first preset time period, putting the heat load into a freezing chamber, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value; if yes, judging whether the refrigerator meets the requirement of freezing capacity according to the temperature of the freezing chamber, and controlling the compressor according to the judgment result. The invention can more scientifically and reasonably utilize the existing resources, save energy and ensure that the refrigeration of the refrigerator is safer and more environment-friendly.

Description

Refrigerator and refrigerator control method
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator and a refrigerator control method.
Background
The prior single-system direct-cooling refrigeration and freezing refrigerator usually has two problems which are difficult to solve during the use process: (1) the refrigerating chamber usually adopts a plate-tube evaporator, and as the evaporator and the refrigerating chamber only have an inner container which is very thin, the inner container can be frozen in the refrigerating process, and the natural melting of ice is slow after the machine is stopped, or manual deicing wastes time and labor; (2) a simple single-system cold-storage freezing refrigerator is generally only provided with a temperature sensor (a temperature sensing guide pipe) at the back of a refrigerating chamber, when a freezing capacity experiment is carried out, a freezing chamber is put into a heat load which is the same as the ambient temperature according to a standard, the freezing chamber is a pipe-wound evaporator, the heat load can heat a refrigerant which is cooled in a pipe, the heated refrigerant flows through an evaporator of the refrigerating chamber, the temperature sensor (the temperature sensing guide pipe) of the refrigerating chamber is heated, the starting time of a compressor is very long (usually 4 h-8 h), the refrigerating chamber temperature is directly too low and is lower than 0 ℃, the experimental standard is not met, and the experimental result is unqualified.
Based on the problems, from the perspective of users, after food is put into the freezing chamber, the refrigerating chamber and the freezing chamber can be refrigerated for a long time, the temperature of the refrigerating chamber is lower than 0 ℃, so that the food is frozen, the user experience is influenced, and the market complaint is caused.
In order to solve the problem that the temperature of a refrigerating chamber is too low due to the fact that a refrigerating chamber is put into a heat load, the existing method is to add a magnetic sensitive switch and a heating wire, when the temperature of the refrigerating chamber is too low after the refrigerating chamber is put into the heat load, the temperature of the refrigerating chamber is raised by starting the heating wire to heat, and besides natural melting ice, the ice in the refrigerating chamber is also defrosted by the heating wire; however, the method cannot scientifically utilize the existing resources, energy waste is caused by heating, and the safety and environmental protection of refrigeration of the refrigerator are poor.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a refrigerator control method, which can solve the problem of low refrigerating room temperature caused by the fact that a refrigerating chamber is put into a heat load without using a heating wire, can more scientifically and reasonably utilize the existing resources, saves energy, and improves the refrigerating safety and environmental protection of the refrigerator.
In order to achieve the above object, an embodiment of the present invention provides a refrigerator, including:
the compressor is used for providing power for refrigeration;
a temperature sensor for detecting a temperature of a refrigerating chamber and a temperature of a freezing chamber of the refrigerator;
the controller is used for judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time;
if not, taking out the heat load to balance to the ambient temperature, and improving the running frequency of the compressor; putting a heat load into the freezing chamber after a first preset time period, and judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset temperature upper limit value;
and if so, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result.
Further, the controller, prior to increasing the operating frequency of the compressor, is further configured to:
judging whether the operating frequency of the compressor reaches a preset frequency upper limit value or not;
then, the controller increases the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the preset upper frequency limit value, the running frequency of the compressor is increased.
Further, the controller determines whether the refrigerator meets the requirement of freezing capacity according to the temperature of the freezing chamber, and controls the compressor according to the obtained determination result, specifically including:
after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
when the temperature of the freezing chamber does not reach the lower limit value of the preset temperature, judging that the refrigerator does not meet the requirement of freezing capacity, taking out the heat load to balance to the ambient temperature, and controlling the operating frequency of the compressor;
and when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and ending the control of the compressor.
Further, the controller controls the operating frequency of the compressor, and specifically includes:
reducing an operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
Further, the controller, prior to reducing the operating frequency of the compressor, is further configured to:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the controller reduces the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
In order to achieve the above object, an embodiment of the present invention further provides a refrigerator control method, which is applied to the refrigerator described in any one of the above, and the method is executed by the controller, and the method includes:
after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not;
if not, taking out the heat load to balance to the ambient temperature, and improving the operating frequency of the compressor; after a first preset time period, putting the heat load into the freezing chamber again, and judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset temperature upper limit value;
if yes, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to an obtained judgment result.
Further, prior to the increasing the operating frequency of the compressor, the method further comprises:
judging whether the operating frequency of the compressor reaches a preset frequency upper limit value or not;
then, the increasing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the preset frequency upper limit value, the running frequency of the compressor is increased.
Further, the determining whether the refrigerator meets the requirement of freezing capacity according to the temperature of the freezing chamber and controlling the compressor according to the obtained determination result specifically includes:
after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
when the temperature of the freezing chamber does not reach the lower limit value of the preset temperature, judging that the refrigerator does not meet the requirement of freezing capacity, taking out the heat load to balance to the ambient temperature, and controlling the operating frequency of the compressor;
and when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and ending the control of the compressor.
Further, the controlling the operating frequency of the compressor specifically includes:
reducing the operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
Further, prior to the reducing the operating frequency of the compressor, the method further comprises:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the reducing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
Compared with the prior art, the refrigerator and the refrigerator control method provided by the embodiment of the invention comprise a compressor, a compressor and a controller, wherein the compressor is used for providing power for refrigeration; a temperature sensor for detecting a temperature of a refrigerating chamber and a temperature of a freezing chamber of the refrigerator; and a controller for executing the following refrigerator control method: after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not; if not, taking out the heat load to balance to the ambient temperature, and improving the operating frequency of the compressor; putting a heat load into the freezing chamber after a first preset time period, and judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset temperature upper limit value; and if so, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result. According to the embodiment of the invention, the compressor is correspondingly controlled by the controller according to the temperature of the freezing chamber and the temperature of the refrigerating chamber detected by the temperature sensor, and the problem of overhigh refrigerating chamber temperature caused by the heat load put into the freezing chamber can be solved without using a heating wire, so that the existing resources can be more scientifically and reasonably utilized, the energy is saved, and the refrigerating safety and the environmental protection performance of the refrigerator are improved.
Drawings
Fig. 1 is a schematic view of an outer case of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a refrigerator according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an operation of a controller of a refrigerator according to an embodiment of the present invention;
fig. 4 is an exemplary operational flowchart of a controller of a refrigerator according to an embodiment of the present invention;
fig. 5 is another operation flowchart of a controller of a refrigerator according to an embodiment of the present invention;
fig. 6 is another exemplary operational flowchart of a controller of a refrigerator according to an embodiment of the present invention;
fig. 7 is a further flowchart of the operation of the controller of the refrigerator according to the embodiment of the present invention;
fig. 8 is a flowchart illustrating still another example of a controller of a refrigerator according to an embodiment of the present invention;
fig. 9 is a schematic flowchart of a refrigerator control method according to an embodiment of the present invention;
fig. 10 is another schematic flow chart of a refrigerator control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1 and fig. 2, in which fig. 1 is a schematic diagram of an outer shell of a refrigerator according to an embodiment of the present invention, and fig. 2 is a schematic diagram of an internal structure of the refrigerator according to the embodiment of the present invention. The refrigerator mainly comprises a refrigerator body 100 and a refrigerating system arranged in the refrigerator body 100; the box 100 shown in fig. 1 and 2 is a rectangular parallelepiped structure, and those skilled in the art will understand that the box 100 may also have other shapes, such as a square, a cylinder, etc.
A freezing chamber 10 and a refrigerating chamber 20 which are separated from each other are provided inside the cabinet 100; in which the freezing chamber 10 is shown in fig. 2 to be located above the refrigerating chamber 20, it will be understood by those skilled in the art that the freezing chamber 10 may also be located below the refrigerating chamber 20.
The refrigeration system includes a compressor 30, and the compressor 30 is configured to compress a refrigerant in a refrigeration cycle flowing through the refrigerator to power the refrigeration cycle of the refrigerator.
In addition, the refrigerator further includes a temperature sensor for detecting the temperature of the refrigerating chamber 20 in real time and the temperature of the freezing chamber 10 in real time.
Referring to fig. 2, a temperature sensor 11 for detecting the temperature of the freezing chamber 10 in real time may be disposed at a liner wall of the freezing chamber 10, and it should be noted that the temperature sensor 11 is mainly used for detecting the temperature of the freezing chamber 10 after a thermal load is applied to the freezing chamber 10, so a temperature sensing probe needs to be added at the liner wall of the freezing chamber 10 where the thermal load is applied; for the direct cooling refrigerator, the direct cooling refrigerator is cooled by heat conduction and direct contact, as long as a heat load is put into the freezing chamber 10, a refrigerant is heated, and all parts of the direct cooling refrigerator are heated by the flowing of the refrigerant, so that only one temperature sensing probe is arranged at the liner wall of the freezing chamber 10, and for the air cooling refrigerator, a plurality of temperature sensing probes are required to be arranged, for example, one temperature sensing probe is arranged at the front, rear, left and right liner walls of the freezing chamber 10.
Referring to fig. 2, the temperature sensor 21 for detecting the temperature of the refrigerating compartment 20 in real time may be disposed on the liner wall of the refrigerating compartment 20, and it should be noted that the temperature sensor 21 is mainly used for detecting the lowest temperature of the refrigerating compartment 20, and since the cold air sinks and the lowest temperature is generally located at the lower portion of the refrigerating compartment 20, a temperature sensing probe needs to be added on the liner wall at the lowest position of the refrigerating compartment 20.
In combination with fig. 2, the refrigerator further includes a controller 40, and the controller 40 is configured to perform corresponding control on the compressor 30 of the refrigerator according to the temperature of the freezing chamber 10 and the temperature of the refrigerating chamber 20 detected by the temperature sensors by using the technical solution provided by the embodiment of the present invention. In particular implementation, the controller 40 is configured to:
after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not;
if not, taking out the heat load to balance to the ambient temperature, and improving the operating frequency of the compressor; after a first preset time period, putting a heat load into the freezing chamber, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value;
and if so, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result.
Referring to fig. 3, which is a flowchart illustrating an operation of a controller of a refrigerator according to an embodiment of the present invention, a specific operation process of the controller is as follows: after a compressor of the refrigerator is started (step S11 shown in fig. 3), after a heat load is placed into the freezing compartment (before the heat load is placed into the freezing compartment, the temperature of the heat load is the same as the ambient temperature), the compressor spends a first startup time from the first startup to the first shutdown, the first startup time is the longest in general, and the temperature returns to the temperature when the compressor is shutdown, and when the heat load is placed into the freezing compartment and the compressor passes the first startup time (i.e., the compressor is shutdown for the first time) (step S12 shown in fig. 3), the current temperature of the refrigerating compartment is detected by a temperature sensor, and whether the temperature of the refrigerating compartment reaches a preset upper temperature limit value is judged (step S13 shown in fig. 3); when it is determined that the temperature of the refrigerating compartment does not reach the preset upper temperature limit value, taking the heat load out of the freezing compartment to balance the temperature of the heat load to the ambient temperature and increase the operating frequency of the compressor (step S14 shown in fig. 3); after the first preset time period (step S15 shown in fig. 3), putting the heat load into the freezing chamber again, and similarly, after the heat load is put into the freezing chamber and the compressor passes the first startup time, judging whether the temperature of the refrigerating chamber reaches the preset upper temperature limit value again (jumping to step S12 shown in fig. 3) until the temperature of the refrigerating chamber reaches the preset upper temperature limit value; when it is determined that the temperature of the refrigerating compartment reaches the preset upper temperature limit value, it is determined whether the refrigerator meets the freezing capacity requirement according to the temperature of the freezing compartment, and the compressor is controlled accordingly according to the obtained determination result (step S16 shown in fig. 3).
The preset upper limit temperature is a temperature threshold set to prevent the temperature of the refrigerating chamber from being too low after the freezing chamber is put into a heat load, and the minimum temperature of the refrigerating chamber is generally required not to be lower than-1 ℃.
Illustratively, the preset upper temperature limit value may be-1 ℃, and correspondingly, if it is determined that the temperature of the refrigerating chamber does not reach-1 ℃, that is, the temperature of the refrigerating chamber is below-1 ℃, the heat load is taken out of the freezing chamber to balance the temperature of the heat load to the ambient temperature and increase the operating frequency of the compressor, and then corresponding processing is performed according to the technical scheme of the embodiment of the present invention; and if the temperature of the refrigerating chamber reaches the preset upper temperature limit value of minus 1 ℃, namely the temperature of the refrigerating chamber is higher than minus 1 ℃, further judging whether the refrigerator meets the freezing capacity requirement according to the temperature of the freezing chamber, and correspondingly controlling the compressor according to the obtained judgment result.
In addition, the preset upper temperature limit value may also be set according to actual needs, and the embodiment of the present invention is not particularly limited.
It should be noted that the first preset time period is the time period between when the heat load is taken out of the freezing chamber and when the heat load restored to the ambient temperature is put into the freezing chamber again, that is, after the first preset time period has elapsed after the heat load is taken out of the freezing chamber, the heat load is put into the freezing chamber again.
For example, the first preset time period may be set to 24 hours, or may be set according to actual needs, and the embodiment of the present invention is not limited in particular.
Referring to fig. 4, which is a flowchart illustrating an exemplary operation of a controller of a refrigerator according to an embodiment of the present invention, in an actual operation process, after a compressor is started, the compressor is operated at a medium frequency before a heat load is placed in a freezing chamber, after the refrigerator is stably operated, the heat load may be placed in the freezing chamber, after the heat load is placed in the freezing chamber and when a first startup time (i.e., a first shutdown of the compressor) of the compressor occurs, it is determined whether a temperature of a refrigerating chamber is higher than-1 ℃. Judging whether the temperature of the refrigerating chamber is higher than minus 1 ℃ again, and repeating the operation until the temperature of the refrigerating chamber is higher than minus 1 ℃; if yes, judging whether the refrigerator meets the freezing capacity requirement according to the temperature of the freezing chamber, and correspondingly controlling the compressor according to the obtained judgment result.
When the operating frequency of the compressor is increased, the controller may increase the operating frequency of the compressor according to a preset frequency threshold, or increase the operating frequency of the compressor according to a preset frequency level, for example, increase the operating frequency of the compressor by one step in fig. 4.
For example, the operation frequency of the compressor may be subdivided into frequency levels of 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 125Hz, 130Hz, 140Hz, etc., the middle frequency generally corresponds to about 80Hz, and correspondingly, the first step may be to increase the operation frequency of the compressor from 80Hz to 90 Hz.
It should be noted that after the compressor is started and before the heat load is put into the freezing chamber, the compressor is generally operated at a medium frequency, and for the air-cooled refrigerator, if frost is formed during the freezing capacity, the compressor can be controlled to operate at a high frequency.
The embodiment of the invention provides a refrigerator, which comprises a compressor, a refrigerating unit and a refrigerating unit, wherein the compressor is used for providing power for refrigeration; a temperature sensor for detecting a temperature of a refrigerating chamber and a temperature of a freezing chamber of the refrigerator; the controller is used for judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time; if not, taking out the heat load to balance to the ambient temperature, and improving the operating frequency of the compressor; after a first preset time period, putting a heat load into the freezing chamber, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value; and if so, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result. According to the embodiment of the invention, the controller is used for correspondingly controlling the compressor according to the temperature of the freezing chamber and the temperature of the refrigerating chamber detected by the temperature sensor, and the problem of too low refrigerating chamber temperature caused by the fact that a thermal load is put into the freezing chamber can be solved without using a heating wire, so that the existing resources can be more scientifically and reasonably utilized, the energy is saved, and the refrigerating safety and the environmental protection performance of the refrigerator are improved.
As an improvement of the above, before increasing the operating frequency of the compressor, the controller is further configured to:
judging whether the running frequency of the compressor reaches a preset frequency upper limit value or not;
then, the controller increases the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the preset frequency upper limit value, the running frequency of the compressor is increased.
Specifically, in conjunction with the above-mentioned embodiment, when the controller executes the process of the loop corresponding to step S12 to step S15 shown in fig. 3, the controller needs to increase the operating frequency of the compressor during each cycle, and those skilled in the art will understand that the operating frequency of the compressor is not increased without limitation, and a preset upper frequency limit is generally set as the maximum operating frequency to ensure that the operating frequency of the compressor is not increased above the maximum operating frequency, and therefore, in each cycle, before increasing the operating frequency of the compressor, the controller first determines whether the current operating frequency of the compressor reaches a preset frequency upper limit value, and only when determining that the operating frequency of the compressor does not reach the preset frequency upper limit value (i.e., the operating frequency of the compressor is below the preset frequency upper limit value), the controller correspondingly increases the operating frequency of the compressor.
It should be noted that, if it is determined that the operating frequency of the compressor reaches the preset upper frequency limit value (that is, the operating frequency of the compressor is higher than the preset upper frequency limit value), which indicates that the limit range of the compressor has been reached at this time, and the operating frequency of the compressor cannot be increased any more, for a direct-cooling refrigerator, the number of packages placed can be correspondingly reduced, and for an air-cooling refrigerator, the rotation speed of the freezing fan can be reduced, or even reduced to the minimum rotation speed.
As an improvement of the above solution, the controller determines whether the refrigerator meets a freezing capacity requirement according to the temperature of the freezing chamber, and controls the compressor according to an obtained determination result, specifically including:
after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
when the temperature of the freezing chamber does not reach the lower limit value of the preset temperature, judging that the refrigerator does not meet the requirement of freezing capacity, taking out the heat load to balance to the ambient temperature, and controlling the operating frequency of the compressor;
and when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and finishing controlling the compressor.
Referring to fig. 5, another operation flowchart of a controller of a refrigerator according to an embodiment of the present invention is shown, where in the above embodiment, when step S16 shown in fig. 3 is executed, the controller may start timing when a heat load is placed into the freezing compartment, obtain a temperature of the freezing compartment through a temperature sensor when the timing reaches a second preset time period (i.e., when the second preset time period elapses after the heat load is placed into the freezing compartment) (step S161 shown in fig. 5), and determine whether the temperature of the freezing compartment reaches a preset temperature lower limit value (step S162 shown in fig. 5); when it is determined that the temperature of the freezing chamber does not reach the preset temperature lower limit value, and it is determined that the refrigerator does not satisfy the preset freezing capacity requirement, the heat load is taken out from the freezing chamber to balance the temperature of the heat load to the ambient temperature, and the operation frequency of the compressor is controlled accordingly (step S163 shown in fig. 5); when it is determined that the temperature of the freezing chamber has reached the preset temperature lower limit value and it is determined that the refrigerator satisfies the preset freezing capacity requirement, the control of the compressor is ended (step S164 shown in fig. 5).
It should be noted that the second preset time period and the lower limit value of the preset temperature are set to judge whether the refrigerator meets the preset freezing capacity requirement, and generally, the temperature of the refrigerator needs to be reduced to below-18 ℃ within 20 hours after the refrigerator is placed in the freezing chamber under the same heat load as the ambient temperature, and the minimum temperature of the refrigerating chamber cannot be lower than-1 ℃.
For example, the second preset time period may be set to 24 hours, the lower limit value of the preset temperature may be set to-18 ℃, and correspondingly, after the heat load is put into the freezing chamber and 24 hours have elapsed, if it is determined that the temperature of the freezing chamber does not reach the lower limit value of the preset temperature of-18 ℃, that is, the temperature of the freezing chamber is above-18 ℃, it is determined that the refrigerator does not meet the preset freezing capacity requirement, the heat load needs to be taken out of the freezing chamber to balance the temperature of the heat load to the ambient temperature, and the operating frequency of the compressor is correspondingly controlled; and if the temperature of the freezing chamber is judged to reach the lower limit value of minus 18 ℃ of the preset temperature, namely the temperature of the freezing chamber is below minus 18 ℃, the refrigerator is judged to meet the preset freezing capacity requirement, and the compressor is not required to be controlled.
In addition, the second preset time period and the preset lower temperature limit may also be set according to actual needs, and the embodiment of the present invention is not particularly limited.
Referring to fig. 6, which is another exemplary operation flowchart of a controller of a refrigerator according to an embodiment of the present invention, in an actual operation process, after a compressor is started, the compressor is operated at a medium frequency before a heat load is placed in a freezing chamber, after the refrigerator is stably operated, the heat load may be placed in the freezing chamber, after the heat load is placed in the freezing chamber and a first startup time of the compressor (i.e., a first shutdown of the compressor), it is determined whether a temperature of a refrigerating chamber is higher than-1 ℃, when it is determined that the temperature of the refrigerating chamber is not higher than-1 ℃, the heat load may be taken out of the freezing chamber to balance the temperature of the heat load to an ambient temperature and increase an operation frequency of the compressor by one step, after the operation frequency of the compressor is increased and a first preset time period elapses, the heat load may be placed in the freezing chamber again, and after the heat load is placed in the freezing chamber and the compressor has the first startup time elapses, judging whether the temperature of the refrigerating chamber is higher than-1 ℃ again, and so on until the temperature of the refrigerating chamber is higher than-1 ℃; when the temperature of the refrigerating chamber is judged to be higher than-1 ℃, whether the temperature of the heat load after 24 hours of storage in the freezing chamber is reduced to be lower than-18 ℃ is further judged, if not, the heat load is taken out from the freezing chamber so as to balance the temperature of the heat load to the ambient temperature, the operation frequency of the compressor is correspondingly controlled, and if so, the control of the compressor is finished.
As an improvement of the above scheme, the controlling the operating frequency of the compressor by the controller specifically includes:
reducing an operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
Referring to fig. 7, it is a flowchart of another operation of a controller of a refrigerator according to an embodiment of the present invention, on the basis of the above embodiment, the controller, in executing step S163 shown in fig. 5, takes out the heat load from the freezing chamber, in order to balance the temperature of the heat load to the ambient temperature and control the operating frequency of the compressor, the operating frequency of the compressor is controlled to be lowered (step S1631 shown in fig. 7), and after the operation frequency of the compressor is lowered and a third preset time period has elapsed (step S1632 shown in fig. 7), it jumps to step S162, that is, the heat load restored to the ambient temperature is put back into the freezing chamber, and after a second preset time period has elapsed, and judging whether the temperature of the freezing chamber reaches the lower limit value of the preset temperature again, and repeating the steps until the temperature of the freezing chamber reaches the lower limit value of the preset temperature.
It should be noted that the third preset time period is the time period between when the heat load is taken out of the freezing chamber and when the heat load restored to the ambient temperature is again put into the freezing chamber, that is, after the heat load is taken out of the freezing chamber, the heat load needs to be put into the freezing chamber again after the third preset time period elapses.
For example, the third preset time period may be set to 24 hours, or may be set according to actual needs, and the embodiment of the present invention is not limited in particular.
Referring to fig. 8, which is a flowchart illustrating still another exemplary operation of a controller of a refrigerator according to an embodiment of the present invention, in an actual operation process, after a compressor is started, a compressor is operated at a medium frequency before a heat load is placed in a freezing chamber, after the refrigerator is stably operated, the heat load may be placed in the freezing chamber, after the heat load is placed in the freezing chamber and a first power-on time of the compressor (i.e., a first stop of the compressor) elapses, it is determined whether a temperature of a refrigerating chamber is higher than-1 ℃, when it is determined that the temperature of the refrigerating chamber is not higher than-1 ℃, the heat load is taken out of the freezing chamber to balance the temperature of the heat load to an ambient temperature and increase an operation frequency of the compressor by one step, after the operation frequency of the compressor is increased and a first preset time period elapses, the heat load is placed in the freezing chamber again, and after the heat load is placed in the freezing chamber and the compressor elapses the first power-on time, judging whether the temperature of the refrigerating chamber is higher than minus 1 ℃ again, and repeating the operation until the temperature of the refrigerating chamber is higher than minus 1 ℃; when the temperature of the refrigerating chamber is judged to be higher than-1 ℃, further judging whether the temperature of the heat load after being put into the freezing chamber for 24 hours is reduced to be lower than-18 ℃, if not, taking the heat load out of the freezing chamber to balance the temperature of the heat load to the ambient temperature, reducing the operating frequency of the compressor by one step, putting the heat load into the freezing chamber again after the operating frequency of the compressor is reduced and a third preset time period passes, judging whether the temperature of the heat load after being put into the freezing chamber for 24 hours is reduced to be lower than-18 ℃, and so on until the temperature of the heat load after being put into the freezing chamber for 24 hours is reduced to be lower than-18 ℃; if the temperature of the heat load after 24 hours of storage in the freezing chamber is judged to be lower than-18 ℃, the control of the compressor is finished.
When the operating frequency of the compressor is decreased, the controller may decrease the operating frequency of the compressor according to a preset frequency threshold, or decrease the operating frequency of the compressor according to a preset frequency level, for example, decrease the operating frequency of the compressor by one step in fig. 8.
For example, the operation frequency of the compressor may be subdivided into frequency levels of 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 125Hz, 130Hz, 140Hz, etc., and assuming that the current operation frequency of the compressor is 100Hz, the first gear reduction may be a reduction of the operation frequency of the compressor from 100Hz to 90 Hz.
As an improvement of the above, before reducing the operating frequency of the compressor, the controller is further configured to:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the controller reduces the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
Specifically, in conjunction with the above-mentioned embodiment, when the controller executes the process of the loop corresponding to steps S161 and S162 and steps S1631 and S1632 shown in fig. 7, the controller needs to reduce the operating frequency of the compressor during each cycle, and those skilled in the art will appreciate that the operating frequency of the compressor is not reduced without limitation, and a preset lower frequency limit is typically set to the minimum operating frequency to ensure that the operating frequency of the compressor is not reduced below the minimum operating frequency, and therefore, in each cycle, before the controller reduces the operating frequency of the compressor, it will first determine whether the current operating frequency of the compressor reaches the preset frequency lower limit value, and only when it is determined that the operating frequency of the compressor does not reach the preset frequency lower limit value (i.e., the operating frequency of the compressor is above the preset frequency upper limit value), the operating frequency of the compressor will be correspondingly reduced.
It should be noted that, if it is determined that the operating frequency of the compressor reaches the preset frequency lower limit (that is, the operating frequency of the compressor is below the preset frequency upper limit), it is determined that the operating frequency of the compressor has reached the limit range of the compressor at this time, and the operating frequency of the compressor cannot be reduced any more, for a direct-cooling refrigerator, the number of packages placed can be correspondingly reduced, and for an air-cooling refrigerator, the rotating speed of the freezing fan can be increased, even increased to the maximum rotating speed.
An embodiment of the present invention further provides a refrigerator control method, which is applicable to the refrigerator described in any of the above embodiments, where the method is executed by the controller, as shown in fig. 9, and is a schematic flow chart of the refrigerator control method provided in the embodiment of the present invention, where the method includes steps S101 to S104:
step S101, after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value;
step S102, if not, taking out the heat load to balance to the ambient temperature, and increasing the running frequency of the compressor; after a first preset time period, putting the heat load into the freezing chamber again, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value;
and S103, if yes, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result.
In some embodiments, prior to said increasing the operating frequency of the compressor, the method further comprises:
judging whether the running frequency of the compressor reaches a preset frequency upper limit value or not;
then, the increasing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the preset frequency upper limit value, the running frequency of the compressor is increased.
Referring to fig. 10, which is another schematic flow chart of a refrigerator control method according to an embodiment of the present invention, in some embodiments, the determining whether the refrigerator meets the requirement of freezing capacity according to the temperature of the freezing chamber, and controlling the compressor according to the obtained determination result specifically includes steps S1031 to S1033:
step S1031, after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
step S1032, when the temperature of the freezing chamber does not reach the lower limit value of the preset temperature, judging that the refrigerator does not meet the requirement of freezing capacity, taking out a heat load to balance to the ambient temperature, and controlling the running frequency of the compressor;
and step S1033, when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and ending the control of the compressor.
In some embodiments, the controlling the operating frequency of the compressor specifically includes:
reducing the operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
In some embodiments, prior to said reducing the operating frequency of the compressor, the method further comprises:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the reducing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
It should be noted that, with the refrigerator control method provided in the embodiment of the present invention, all the work flows of the refrigerator described in any one of the above embodiments can be implemented, and the specific implementation and the implemented technical effects of the method are respectively the same as those of the refrigerator described in the above embodiment, and are not described herein again.
To sum up, the refrigerator and the refrigerator control method provided by the embodiment of the invention comprise a compressor for providing power for refrigeration; a temperature sensor for detecting a temperature of a refrigerating chamber and a temperature of a freezing chamber of the refrigerator; and a controller for executing the following refrigerator control method: after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not; if not, taking out the heat load to balance to the ambient temperature, and improving the running frequency of the compressor; after a first preset time period, putting a heat load into the freezing chamber, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value; if yes, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to an obtained judgment result. According to the embodiment of the invention, the controller is used for correspondingly controlling the compressor according to the temperature of the freezing chamber and the temperature of the refrigerating chamber detected by the temperature sensor, and the problem of too low refrigerating chamber temperature caused by the fact that a thermal load is put into the freezing chamber can be solved without using a heating wire, so that the existing resources can be more scientifically and reasonably utilized, the energy is saved, and the refrigerating safety and the environmental protection performance of the refrigerator are improved.
The above description is only a few embodiments of the present invention, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A refrigerator, characterized in that the refrigerator comprises:
the compressor is used for providing power for refrigeration;
a temperature sensor for detecting a temperature of a refrigerating chamber and a temperature of a freezing chamber of the refrigerator;
the controller is used for judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time;
if not, taking out the heat load to balance to the ambient temperature, and improving the running frequency of the compressor; after a first preset time period, putting a heat load into the freezing chamber, and judging whether the temperature of the refrigerating chamber reaches a preset upper temperature limit value or not again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset upper temperature limit value;
if yes, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to an obtained judgment result.
2. The refrigerator of claim 1, wherein the controller, prior to increasing the operating frequency of the compressor, is further configured to:
judging whether the running frequency of the compressor reaches a preset frequency upper limit value or not;
then, the controller increases the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the preset upper frequency limit value, the running frequency of the compressor is increased.
3. The refrigerator as claimed in claim 1, wherein the controller determines whether the refrigerator meets a freezing capacity requirement according to the temperature of the freezing chamber, and controls the compressor according to the obtained determination result, specifically comprising:
after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
when the temperature of the freezing chamber does not reach the lower limit value of the preset temperature, judging that the refrigerator does not meet the requirement of freezing capacity, taking out the heat load to balance to the ambient temperature, and controlling the operating frequency of the compressor;
and when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and ending the control of the compressor.
4. The refrigerator as claimed in claim 3, wherein the controller controls the operation frequency of the compressor, specifically comprising:
reducing an operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
5. The refrigerator of claim 4, wherein the controller, prior to reducing the operating frequency of the compressor, is further configured to:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the controller reduces the operating frequency of the compressor, specifically:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
6. A refrigerator control method, adapted to the refrigerator of any one of claims 1 to 5, the method being performed by the controller, the method comprising:
after the compressor is started, when a heat load with the same temperature as the ambient temperature is put into the freezing chamber and the compressor is started for the first time, judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value or not;
if not, taking out the heat load to balance to the ambient temperature, and improving the running frequency of the compressor; after a first preset time period, putting the heat load into the freezing chamber again, and judging whether the temperature of the refrigerating chamber reaches a preset temperature upper limit value again when the compressor is started for the first time until the temperature of the refrigerating chamber reaches the preset temperature upper limit value;
and if so, judging whether the refrigerator meets the freezing capacity requirement or not according to the temperature of the freezing chamber, and controlling the compressor according to the obtained judgment result.
7. The method as claimed in claim 6, wherein before the increasing the operating frequency of the compressor, the method further comprises:
judging whether the operating frequency of the compressor reaches a preset frequency upper limit value or not;
then, the increasing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the preset upper frequency limit value, the running frequency of the compressor is increased.
8. The method as claimed in claim 6, wherein said determining whether the refrigerator meets the freezing capacity requirement according to the temperature of the freezing chamber and controlling the compressor according to the obtained determination result comprises:
after the heat load is placed in the freezing chamber and a second preset time period passes, acquiring the temperature of the freezing chamber, and judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value or not;
when the temperature of the freezing chamber does not reach a preset temperature lower limit value, judging that the refrigerator does not meet the requirement of freezing capacity, taking out a heat load to balance to the ambient temperature, and controlling the operating frequency of the compressor;
and when the temperature of the freezing chamber reaches a preset temperature lower limit value, judging that the refrigerator meets the freezing capacity requirement, and finishing controlling the compressor.
9. The method for controlling the refrigerator according to claim 8, wherein the controlling the operation frequency of the compressor specifically comprises:
reducing the operating frequency of the compressor;
and after a third preset time period, putting the heat load into the freezing chamber again, and after a second preset time period, judging whether the temperature of the freezing chamber reaches a preset temperature lower limit value again until the temperature of the freezing chamber reaches the preset temperature lower limit value.
10. The method as claimed in claim 9, wherein before the reducing the operating frequency of the compressor, the method further comprises:
judging whether the running frequency of the compressor reaches a preset frequency lower limit value or not;
then, the reducing the operating frequency of the compressor specifically includes:
and when the running frequency of the compressor does not reach the lower limit value of the preset frequency, reducing the running frequency of the compressor.
CN202210364574.1A 2022-04-08 2022-04-08 Refrigerator and refrigerator control method Active CN114777379B (en)

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JPH10197126A (en) * 1997-01-08 1998-07-31 Mitsubishi Electric Corp Control device for freezer and refrigerator
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