CN113915900A - Refrigerator and constant-temperature refrigeration method thereof - Google Patents

Refrigerator and constant-temperature refrigeration method thereof Download PDF

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Publication number
CN113915900A
CN113915900A CN202110650208.8A CN202110650208A CN113915900A CN 113915900 A CN113915900 A CN 113915900A CN 202110650208 A CN202110650208 A CN 202110650208A CN 113915900 A CN113915900 A CN 113915900A
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China
Prior art keywords
temperature
chamber
change rate
compressor
cavity
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Granted
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CN202110650208.8A
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Chinese (zh)
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CN113915900B (en
Inventor
***
赵兴
段跃斌
鲍雨锋
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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Publication of CN113915900A publication Critical patent/CN113915900A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • 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
    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • 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
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer
    • 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)
  • 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 invention provides a refrigerator and a constant temperature refrigeration method thereof, wherein the refrigerator comprises a refrigerator body, a refrigeration system, a temperature sensor module and a controller, the refrigeration system comprises a compressor, the compressor comprises a cavity adjusting mechanism, and the controller is configured as follows: when the starting condition is determined to be met, controlling the compressor to start to operate; after the preset time, acquiring the temperature change rate of the first chamber; if the temperature change rate of the first chamber is determined not to be in the first set range, adjusting the rotating speed of the compressor until the first condition or the second condition is met; and if the second condition is determined to be met, controlling the volume of the accommodating cavity adjusting mechanism to adjust the volume of the accommodating cavity according to the current ambient temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is in a first set range. By adopting the embodiment of the invention, the refrigerating capacity of the refrigerator can be adjusted according to the rotating speed of the compressor and the volume of the variable volume cavity in the compressor, thereby realizing constant-temperature refrigeration and reducing the energy consumption of the refrigerator.

Description

Refrigerator and constant-temperature refrigeration method thereof
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a constant-temperature refrigeration method thereof.
Background
Temperature is one of the most important parameters of a refrigerator system. The existing single-system refrigerator controls the on-off of the compressor by detecting the actual temperature of each chamber so as to realize the temperature control of each chamber. In the running process of the refrigerator, the temperature in the compartment is detected in real time, when the temperature in the compartment is higher than the upper limit value of the temperature in the compartment, the compressor is started, the compartment starts to cool, and after the temperature reaches the set temperature, the compressor is stopped, so that the circulation is carried out, and the temperature in the compartment is maintained within the upper limit value of the temperature. However, in such a manner that the temperature in the compartment is controlled by periodically starting and stopping the compressor, the temperature in the compartment fluctuates greatly, and constant-temperature refrigeration cannot be realized.
Disclosure of Invention
The invention provides a refrigerator and a constant temperature refrigeration method thereof, which can adjust the refrigeration capacity in a compartment by adjusting the rotating speed of a compressor and the volume of a variable volume cavity in the compressor, so that the temperature change rate in the compartment is stabilized in a set range, constant temperature refrigeration is realized, and the energy consumption of the refrigerator is reduced.
A refrigerator provided in a first embodiment of the present invention includes:
the box body is internally provided with a first chamber;
the refrigerating system is arranged in the box body and used for refrigerating the first compartment, the refrigerating system comprises a compressor, the compressor comprises a compression component, a containing cavity and a containing cavity adjusting mechanism used for adjusting the volume of the containing cavity, and the containing cavity is communicated with an air cylinder in the compression component;
the temperature sensor module is used for detecting the ambient temperature and the temperature of the first chamber;
a controller connected with the compressor and the temperature sensor module, configured to:
acquiring the temperature of the first chamber in real time;
when the starting condition is determined to be met, controlling the compressor to start to operate; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber;
after the compressor is started for a preset time, acquiring the temperature change rate of the first chamber;
if the first condition is determined not to be met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and re-acquiring the temperature change rate of the first chamber after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range;
if the second condition is determined to be met, the current environment temperature is obtained, and the volume of the accommodating cavity is controlled to be adjusted by the accommodating cavity adjusting mechanism according to the current environment temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is in the first set range.
In the refrigerator provided in the second embodiment of the present invention, if it is determined that the second condition is satisfied, acquiring a current ambient temperature, and controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the current ambient temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is within the first set range includes:
if the second condition is determined to be met, acquiring the current ambient temperature;
determining a target cavity volume corresponding to the current ambient temperature according to a preset corresponding relation between the ambient temperature and the cavity volume;
controlling the cavity adjusting mechanism to adjust the volume of the cavity to the target cavity volume;
after the preset time, acquiring the temperature change rate of the first chamber again;
if the temperature change rate of the first chamber is determined not to be in the first set range, controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again until the temperature change rate of the first chamber is in the first set range.
In the refrigerator provided in the third embodiment of the present invention, the controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first compartment is positive, controlling the cavity adjusting mechanism to reduce the volume of the cavity by a first volume;
and when the temperature change rate of the first chamber is negative, controlling the cavity adjusting mechanism to increase the volume of the cavity by a second volume.
In the refrigerator provided in the fourth embodiment of the present invention, a second chamber is further disposed in the refrigerator body, and an upper limit value of the temperature of the first chamber is smaller than that of the second chamber; the refrigerating system is also used for refrigerating the second chamber; the temperature sensor module is also used for detecting the temperature of the second chamber;
the starting-up condition further comprises that the temperature of the second chamber is greater than the upper limit value of the temperature of the second chamber;
the refrigerator also comprises an adjustable air door which is arranged at the air channel communication position of the first chamber and the second chamber and is used for adjusting the air quantity entering the second chamber;
the controller is further configured to:
acquiring the temperature of the second chamber in real time;
when the first condition is determined to be met, if the temperature of the second chamber is determined not to be in a second set range, the opening degree of the adjustable air door is adjusted according to the size relation between the temperature of the second chamber and the second set range until the temperature of the second chamber is in the second set range.
In the refrigerator according to the fifth embodiment of the present invention, the adjusting the opening degree of the damper according to the relationship between the temperature of the second compartment and the second setting range specifically includes:
when the temperature of the second compartment is greater than the upper limit value of the second set range, the opening degree of the adjustable air door is adjusted upwards by a first opening value;
and when the temperature of the second compartment is greater than the lower limit value of the second set range, the opening degree of the adjustable air door is adjusted downwards by a second opening value.
In a refrigerator according to a sixth embodiment of the present invention, the second set range is-1 ℃ to +1 ℃.
In the refrigerator provided in the seventh embodiment of the present invention, before the acquiring the temperature of the first compartment in real time, the controller is further configured to:
when the refrigerator is powered on, the adjustable air door is adjusted to an initial opening degree, the volume of the accommodating cavity is adjusted to an initial volume, the compressor is adjusted to an initial rotating speed, and the temperature of the second compartment is detected after a preset time;
if the temperature of the second compartment is determined to be within a second set temperature range, closing the adjustable air door, and detecting the temperature of the first compartment after preset time;
and if the temperature of the first compartment is determined to be within a preset shutdown temperature range, controlling the compressor to shut down.
In the refrigerator according to the eighth embodiment of the present invention, the adjusting the rotation speed of the compressor according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first chamber is positive, the rotating speed of the compressor is adjusted to a first rotating speed value;
and when the temperature change rate of the first chamber is negative, the rotating speed of the compressor is reduced by a second rotating speed value.
In a refrigerator according to a ninth embodiment of the present invention, the first predetermined range is-0.1 ℃/min to +0.1 ℃/min.
The constant-temperature refrigeration method for the refrigerator provided by the tenth embodiment of the invention comprises the following steps:
acquiring the temperature of a first chamber of the refrigerator in real time;
when the starting condition is determined to be met, controlling a compressor of the refrigerator to start to operate; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber;
after the compressor is started for a preset time, acquiring the temperature change rate of the first chamber;
if the first condition is determined not to be met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and re-acquiring the temperature change rate of the first chamber after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range;
if the second condition is determined to be met, acquiring the current environment temperature, and controlling a cavity adjusting mechanism of the compressor to adjust the volume of a cavity of the compressor according to the current environment temperature and the temperature change rate of the first chamber so as to enable the temperature change rate of the first chamber to be within the first set range; wherein, the cavity is communicated with a cylinder in a compression component of the compressor.
Compared with the prior art, the refrigerator and the constant-temperature refrigeration method thereof provided by the embodiment of the invention can adjust the rotating speed of the compressor and the volume of the variable cavity which is additionally arranged in the compressor and communicated with the air cylinder according to the temperature change condition in the compartment so as to adjust the refrigeration capacity in the compartment, thereby stabilizing the temperature change rate in the compartment within a set range, solving the problem that constant-temperature refrigeration cannot be realized due to large temperature fluctuation in the compartment, effectively avoiding frequent start and stop of the compressor, and reducing the energy consumption of the refrigerator.
Drawings
Fig. 1 is a flowchart illustrating an operation of a controller in a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a refrigeration system in a refrigerator according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a compressor in a refrigerator according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of an adjustable damper in a refrigerator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of another constant-temperature refrigeration method for a refrigerator 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 some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, a flowchart of an operation of a controller in a refrigerator according to an embodiment of the present invention is shown.
The refrigerator provided in the embodiment of the present invention includes:
the box body is internally provided with a first chamber;
the refrigerating system is arranged in the box body and used for refrigerating the first compartment, the refrigerating system comprises a compressor, the compressor comprises a compression component, a containing cavity and a containing cavity adjusting mechanism used for adjusting the volume of the containing cavity, and the containing cavity is communicated with an air cylinder in the compression component;
the temperature sensor module is used for detecting the ambient temperature and the temperature of the first chamber;
a controller connected with the compressor and the temperature sensor module, configured to:
s11, acquiring the temperature of the first chamber in real time;
s12, controlling the compressor to start running when the starting condition is determined to be met; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber;
s13, acquiring the temperature change rate of the first chamber after the compressor is started for a preset time;
s14, if it is determined that the first condition is not met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range;
and S15, if it is determined that the second condition is met, acquiring the current environment temperature, and controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the current environment temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is within the first set range.
After the refrigerator is powered on, if the temperature in each compartment reaches a stable condition, the refrigerator will be shut down, and the controller will execute the above-mentioned work flow. And when the starting condition is determined not to be met, the compressor is in a stop state, and if the temperature in the compartment meets the starting condition, the compressor is controlled to start and operate.
Exemplarily, referring to fig. 2, the embodiment of the present invention provides a structural schematic diagram of a refrigeration system in a refrigerator, the refrigeration system further includes a dew-removing pipe 22, a condensation pipe 23, a filter 24, a capillary tube 25 and an evaporator 26 in addition to a compressor 21, an outlet of the compressor 21 is connected to an inlet of the dew-removing pipe 22, an outlet of the dew-removing pipe 22 is connected to an inlet of the condensation pipe 23, an outlet of the condensation pipe 23 is connected to an inlet of the filter 24, an outlet of the filter 24 is connected to an inlet of the capillary tube 25, an outlet of the capillary tube 25 is connected to an inlet of the evaporator 26, and an outlet of the evaporator 26 is connected to an inlet of the compressor 21. Except for improving the structure of the compressor, the refrigeration system described in this embodiment has the same structure as the prior art, and therefore, the refrigeration cycle process for the refrigeration system is not described herein again.
The first setting range may be set according to actual requirements or experimental results, and is not limited herein.
It can be understood that, in the present embodiment, when the temperature change rate of the first chamber is stabilized within the first setting range, it indicates that the temperature change in the first chamber is relatively smooth, that is, the temperature fluctuation is relatively small. If the temperature change rate of the first chamber is not in the first set range, it indicates that the temperature change in the first chamber does not tend to be gentle, at this time, the rotating speed of the compressor is adjusted according to the temperature change rate of the first chamber, so that the refrigerating capacity of the compressor is continuously adjusted, and the temperature change rate of the first chamber is stabilized in the first set range.
In addition, it can be understood that, in the prior art, when the single-system refrigerator performs refrigeration, the refrigerating chamber and the freezing chamber perform alternate refrigeration simultaneously, when the temperature of the refrigerating chamber reaches the preset stable temperature range of the refrigerating chamber, an air door between air ducts of the refrigerating chamber and the freezing chamber is closed, the freezing chamber is continuously refrigerated, when the temperature in the freezing chamber reaches the preset compressor shutdown temperature, the compressor is controlled to shut down, and when the temperature in the refrigerating chamber or the freezing chamber reaches the preset startup temperature after a period of time, the compressor is controlled to start up to perform alternate refrigeration on the refrigerating chamber and the refrigerating chamber, so that the cycle is repeated, and the temperature of each chamber in the refrigerator is adjusted through the periodic startup and shutdown of the compressor. However, the mode of controlling the temperature in the compartment by periodically starting and stopping the compressor can lead to large temperature fluctuation in the compartment, so that constant-temperature refrigeration cannot be realized, and meanwhile, the frequent starting and stopping of the compressor can also lead to large energy consumption of the refrigerator. In the embodiment of the invention, the refrigerating capacity in each compartment of the refrigerator can be adjusted by adjusting the rotating speed of the compressor and the volume of the variable volume cavity in the compressor, so that the temperature change rate in the compartment is stabilized in a set range, the temperature change in the compartment tends to be smooth, the constant-temperature refrigeration is realized, and the energy consumption of the refrigerator is reduced. It is worth to be noted that, compared with the prior art, the refrigerator and the constant temperature refrigeration method thereof provided by the embodiment of the invention can adjust the rotating speed of the compressor and the volume of the variable cavity which is additionally arranged in the compressor and is communicated with the cylinder according to the temperature change condition in the compartment so as to adjust the refrigerating capacity in the compartment, thereby stabilizing the temperature change rate in the compartment within a set range, solving the problem that constant temperature refrigeration cannot be realized due to large temperature fluctuation in the compartment, effectively avoiding frequent start and stop of the compressor, and reducing the energy consumption of the refrigerator.
As an optional implementation manner, if it is determined that the second condition is satisfied, acquiring a current ambient temperature, and controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the current ambient temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is within the first set range, includes:
if the second condition is determined to be met, acquiring the current ambient temperature;
determining a target cavity volume corresponding to the current ambient temperature according to a preset corresponding relation between the ambient temperature and the cavity volume;
controlling the cavity adjusting mechanism to adjust the volume of the cavity to the target cavity volume;
after the preset time, acquiring the temperature change rate of the first chamber again;
if the temperature change rate of the first chamber is determined not to be in the first set range, controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again until the temperature change rate of the first chamber is in the first set range.
Exemplarily, referring to fig. 3, the structural diagram of a compressor in a refrigerator according to an embodiment of the present invention is shown, where the compressor is composed of a crankcase 31, a cylinder 32, a piston 33, a cavity 34, and a cavity adjusting mechanism 35 for adjusting the volume of the cavity 34, and the compressing component includes the crankcase 31, the cylinder 32, and the piston 33, where the cavity 34 is communicated with the cylinder 32 in the compressing component through a connecting passage 36. By adding a cavity adjusting mechanism 35 with a variable volume 34 in the crankcase 31 and connecting the cavity adjusting mechanism 35 with the cylinder 32 through a connecting passage 36, the volume of the variable volume 34 can be adjusted through the cavity adjusting mechanism 35 in the operation process of the compressor, so that output of different refrigerating capacities is realized.
It can be understood that, in the actual operation process of the refrigerator, if it is determined that the temperature change rate of the first chamber is not within the first set range, the rotation speed of the compressor is adjusted according to the temperature change rate of the first chamber. In the process of adjusting the rotation speed of the compressor, if the temperature change rate of the first chamber is still lower than the lower limit value of the first setting range when the rotation speed of the compressor is reduced to the lowest rotation speed, the volume of the variable cavity 34 in the cavity adjusting mechanism 35 is adjusted from the target cavity volume to the corresponding volume, so as to correspondingly adjust the temperature in the first chamber.
It should be noted that, in the process of adjusting the temperature in the compartment by the rotational speed of the compressor, when the rotational speed of the compressor is lower than a certain rotational speed, the performance of the compressor is reduced, or even the compressor cannot normally operate, and therefore, the compressor is generally set to the lowest rotational speed. When the compressor is adjusted to the preset lowest rotating speed, if the temperature in the compartment is still lower than the lower limit value of the set temperature, a large difference exists between the minimum cold output by the compressor and the actual cold demand of the refrigerator. In the embodiment, on the basis of the existing compressor, the cavity adjusting mechanism communicated with the cylinder of the compressor is additionally arranged in the compressor, the cavity of the cavity adjusting mechanism is connected with the cylinder, and the compressor is enabled to output smaller refrigerating capacity by adjusting the clearance volume in the cylinder of the compressor, so that the temperature change rate in the compartment is stabilized within a set range, constant-temperature refrigeration is realized, and the energy consumption of the refrigerator is reduced.
As an optional embodiment, the controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first compartment is positive, controlling the cavity adjusting mechanism to reduce the volume of the cavity by a first volume;
and when the temperature change rate of the first chamber is negative, controlling the cavity adjusting mechanism to increase the volume of the cavity by a second volume.
It is understood that when the temperature change rate of the first compartment increases and exceeds the upper limit value of the first set range, the cavity adjusting mechanism is reduced by the first volume, so that the clearance volume in the cylinder is reduced, thereby increasing the refrigerating capacity of the compressor, and vice versa.
Illustratively, the first volume and the second volume are both 1% of the volume of the cavity, when the temperature change rate of the first chamber is positive, the cavity adjusting mechanism is controlled to reduce the volume of the cavity by 1%, and when the temperature change rate of the first chamber is negative, the cavity adjusting mechanism is controlled to increase the volume of the cavity by 1%.
It should be noted that, both the first volume and the second volume may be set according to actual requirements or experimental results, and are not limited herein.
It is worth mentioning that the volume of the accommodating cavity adjusting mechanism is adjusted according to the temperature change rate of the first chamber, so that the refrigerating capacity of the compressor can be adjusted, the temperature in the refrigerator chamber is adjusted, constant-temperature refrigeration is realized, the problems that the temperature fluctuation in the chamber is large and the constant-temperature refrigeration cannot be realized due to frequent starting and stopping of the compressor can be effectively avoided, and the energy consumption of the refrigerator is further reduced.
As an optional embodiment, a second chamber is further arranged in the box body, and the upper limit value of the temperature of the first chamber is smaller than that of the second chamber; the refrigerating system is also used for refrigerating the second chamber; the temperature sensor module is also used for detecting the temperature of the second chamber;
the starting-up condition further comprises that the temperature of the second chamber is greater than the upper limit value of the temperature of the second chamber;
the refrigerator also comprises an adjustable air door which is arranged at the air channel communication position of the first chamber and the second chamber and is used for adjusting the air quantity entering the second chamber;
the controller is further configured to:
acquiring the temperature of the second chamber in real time;
when the first condition is determined to be met, if the temperature of the second chamber is determined not to be in a second set range, the opening degree of the adjustable air door is adjusted according to the size relation between the temperature of the second chamber and the second set range until the temperature of the second chamber is in the second set range.
It should be noted that the compartments of the refrigerator are not limited to two compartments, which are only illustrated herein, and the second setting range may be set according to actual needs or experimental results, which is not limited herein.
For example, as shown in fig. 4, the structural diagram of the adjustable damper in the refrigerator according to the embodiment of the present invention is a structural diagram of the adjustable damper, where the opening of the adjustable damper can be flexibly adjusted, and as shown in fig. 5, the structural diagram of the refrigerator according to the embodiment of the present invention includes a first compartment 51, a second compartment 52, and an adjustable damper 53, where the adjustable damper 53 is disposed at a position where an air duct of the first compartment and the second compartment communicates, and can control an air volume entering the cold second compartment from the first compartment according to the opening of the adjustable damper 53. In addition, it can be understood that the first compartment may be a freezing compartment, the second compartment may be a refrigerating compartment, and when the temperature of the freezing compartment reaches a preset stable range, the temperature of the refrigerating compartment is adjusted through the opening degree of the adjustable damper.
It is worth to be noted that, after the compressor is started to operate, the compressor operates according to a rotation speed initially set according to a current ambient temperature and a set temperature, and after a preset time, a temperature change condition of the first compartment is detected, if the temperature in the first compartment reaches a preset stable range, the temperature of at least one second compartment is adjusted, and according to a magnitude relation between the temperature in the second compartment and a second set temperature, the opening degree of an adjustable air door is correspondingly adjusted, so that the air volume entering the second compartment is adjusted, the temperature in the second compartment is adjusted until the temperature in the second compartment reaches the second set temperature range, and therefore the temperature of each compartment of the refrigerator reaches the stable range, and constant temperature refrigeration of the refrigerator is achieved.
As an optional implementation manner, the adjusting the opening degree of the adjustable damper according to the relationship between the temperature of the second compartment and the second set range specifically includes:
when the temperature of the second compartment is greater than the upper limit value of the second set range, the opening degree of the adjustable air door is adjusted upwards by a first opening value;
and when the temperature of the second compartment is greater than the lower limit value of the second set range, the opening degree of the adjustable air door is adjusted downwards by a second opening value.
For example, the first opening value and the second opening value are 1% of the current opening of the adjustable damper, when the temperature of the second compartment is greater than the upper limit value of the second set range, the opening of the adjustable damper is adjusted up by 1%, and when the temperature of the second compartment is greater than the lower limit value of the second set range, the opening of the adjustable damper is adjusted down by 1%.
It should be noted that, both the first opening value and the second opening value may be set according to actual requirements or experimental results, and are not limited herein.
It is worth to be noted that after the temperature in the first chamber is stabilized, the temperature in the second chamber is adjusted through the opening degree of the adjustable air door until the temperature in the second chamber reaches a second set range, the temperature in the first chamber is detected, if the temperature in the first chamber does not meet the stable adjustment, the temperature in the first chamber is adjusted according to the rotating speed of the compressor and the volume of the accommodating chamber in the accommodating chamber adjusting mechanism until the temperature in the first chamber reaches a first set range, and therefore the temperature in the first chamber and the temperature in the second chamber reach the corresponding set temperature ranges, and constant-temperature refrigeration is achieved. Compared with the prior art, the method for adjusting the temperature in each chamber in the refrigerator by adjusting the rotating speed of the compressor, the volume of the chamber in the chamber adjusting mechanism and the opening degree of the adjustable air door can further reduce the energy consumption of the refrigerator.
As an alternative embodiment, the second set range is-1 ℃ to +1 ℃.
As one optional embodiment, before the obtaining the temperature of the first compartment in real time, the controller is further configured to:
when the refrigerator is powered on, the adjustable air door is adjusted to an initial opening degree, the volume of the accommodating cavity is adjusted to an initial volume, the compressor is adjusted to an initial rotating speed, and the temperature of the second compartment is detected after a preset time;
if the temperature of the second compartment is determined to be within a second set temperature range, closing the adjustable air door, and detecting the temperature of the first compartment after preset time;
and if the temperature of the first compartment is determined to be within a preset shutdown temperature range, controlling the compressor to shut down.
For example, when the refrigerator is powered on, the opening degree of the adjustable air door is set to 100%, the volume of the accommodating cavity is set to 0%, the rotating speed of the compressor is set to 3900rpm, the refrigerator runs until the temperature in the refrigerating chamber reaches a second set range according to the parameters, the adjustable air door is closed, the freezing chamber is cooled continuously until the temperature in the freezing chamber is within a preset shutdown temperature range, and the compressor is controlled to shut down.
It should be noted that the initial opening, the initial volume, and the initial rotation speed may be set according to actual requirements or experimental results, and are not limited herein.
It is worth to be noted that, when the refrigerator is powered on, the temperature in each compartment of the refrigerator is adjusted to a corresponding stable range according to initial parameters, the compressor is controlled to stop, the temperature in the compartment is detected again after a period of time, and if the temperature in the compartment is not within a preset temperature range, the temperature in the compartment is adjusted by adjusting the rotating speed of the compressor, the volume of the accommodating cavity and the opening degree of the adjustable air door until the temperature in the compartment reaches the preset temperature range. With this circulation to can effectively avoid because frequent start-stop of compressor leads to the indoor temperature fluctuation great in the room, can't realize the refrigerated problem of constant temperature, further reduce the energy consumption of refrigerator.
As an optional implementation manner, the adjusting the rotation speed of the compressor according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first chamber is positive, the rotating speed of the compressor is adjusted to a first rotating speed value;
and when the temperature change rate of the first chamber is negative, the rotating speed of the compressor is reduced by a second rotating speed value.
Illustratively, the first rotation speed value and the second rotation speed value are both 150rpm, the rotation speed of the compressor is adjusted up to 150rpm when the temperature change rate of the first compartment is positive, and the rotation speed of the compressor is adjusted down to 150rpm when the temperature change rate of the first compartment is negative.
It should be noted that, both the first rotation speed value and the second rotation speed value may be set according to actual requirements or experimental results, and are not limited herein.
It should be noted that the rotation speed of the compressor is adjusted according to the temperature change rate of the first compartment to adjust the temperature in the refrigerator compartment, the rotation speed of the compressor is adjusted up when the temperature change rate of the first compartment is positive, and the rotation speed of the compressor is adjusted down when the temperature change rate of the first compartment is negative, so that the temperature in the compartment is controlled by the rotation speed of the inverter compressor.
As one of alternative embodiments, the first set range is from-0.1 ℃/min to +0.1 ℃/min.
Referring to fig. 6, a schematic flow chart of another constant temperature refrigeration method for a refrigerator according to an embodiment of the present invention is shown.
The constant-temperature refrigeration method of the refrigerator provided by the embodiment of the invention comprises the following steps:
and S61, acquiring the temperature of the first compartment of the refrigerator in real time.
S62, controlling the compressor of the refrigerator to start running when the starting condition is determined to be met; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber.
And S63, acquiring the temperature change rate of the first chamber after the compressor is started for a preset time.
S64, if it is determined that the first condition is not met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range.
S65, if it is determined that the second condition is met, acquiring the current environment temperature, and controlling a cavity adjusting mechanism of the compressor to adjust the volume of a cavity of the compressor according to the current environment temperature and the temperature change rate of the first chamber so as to enable the temperature change rate of the first chamber to be within the first set range; wherein, the cavity is communicated with a cylinder in a compression component of the compressor.
Compared with the prior art, the refrigerator and the constant-temperature refrigeration method thereof provided by the embodiment of the invention can adjust the rotating speed of the compressor and the volume of the variable cavity which is additionally arranged in the compressor and communicated with the air cylinder according to the temperature change condition in the compartment so as to adjust the refrigeration capacity in the compartment, thereby stabilizing the temperature change rate in the compartment within a set range, solving the problem that constant-temperature refrigeration cannot be realized due to large temperature fluctuation in the compartment, effectively avoiding frequent start and stop of the compressor, and reducing the energy consumption of the refrigerator. As an optional implementation manner, if it is determined that the second condition is satisfied, acquiring a current ambient temperature, and controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the current ambient temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is within the first set range, includes:
if the second condition is determined to be met, acquiring the current ambient temperature;
determining a target cavity volume corresponding to the current ambient temperature according to a preset corresponding relation between the ambient temperature and the cavity volume;
controlling the cavity adjusting mechanism to adjust the volume of the cavity to the target cavity volume;
after the preset time, acquiring the temperature change rate of the first chamber again;
if the temperature change rate of the first chamber is determined not to be in the first set range, controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again until the temperature change rate of the first chamber is in the first set range.
As an optional embodiment, the controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first compartment is positive, controlling the cavity adjusting mechanism to reduce the volume of the cavity by a first volume;
and when the temperature change rate of the first chamber is negative, controlling the cavity adjusting mechanism to increase the volume of the cavity by a second volume.
As an optional implementation manner, a second chamber is further arranged in the refrigerator body, and the upper limit value of the temperature of the first chamber is smaller than that of the second chamber; the refrigerating system in the refrigerator is also used for refrigerating the second chamber; the temperature sensor module in the refrigerator is also used for detecting the temperature of the second chamber;
the starting-up condition further comprises that the temperature of the second chamber is greater than the upper limit value of the temperature of the second chamber;
the refrigerator also comprises an adjustable air door which is arranged at the air channel communication position of the first chamber and the second chamber and is used for adjusting the air quantity entering the second chamber;
the constant-temperature refrigeration method of the refrigerator further comprises the following steps:
detecting a temperature of the second compartment upon determining that the first condition is satisfied;
and if the temperature of the second chamber is determined not to be in a second set range, adjusting the opening degree of the adjustable air door according to the size relation between the temperature of the second chamber and the second set range until the temperature of the second chamber is in the second set range.
As an optional implementation manner, the adjusting the opening degree of the adjustable damper according to the relationship between the temperature of the second compartment and the second set range specifically includes:
when the temperature of the second compartment is greater than the upper limit value of the second set range, the opening degree of the adjustable air door is adjusted upwards by a first opening value;
and when the temperature of the second compartment is greater than the lower limit value of the second set range, the opening degree of the adjustable air door is adjusted downwards by a second opening value.
As an alternative embodiment, the second set range is-1 ℃ to +1 ℃.
As one optional embodiment, before the obtaining the temperature of the first compartment in real time, the controller is further configured to:
when the refrigerator is powered on, the adjustable air door is adjusted to an initial opening degree, the volume of the accommodating cavity is adjusted to an initial volume, the compressor is adjusted to an initial rotating speed, and the temperature of the second compartment is detected after a preset time;
if the temperature of the second compartment is determined to be within a second set temperature range, closing the adjustable air door, and detecting the temperature of the first compartment after preset time;
and if the temperature of the first compartment is determined to be within a preset shutdown temperature range, controlling the compressor to shut down.
As an optional implementation manner, the adjusting the rotation speed of the compressor according to the temperature change rate of the first chamber specifically includes:
when the temperature change rate of the first chamber is positive, the rotating speed of the compressor is adjusted to a first rotating speed value;
and when the temperature change rate of the first chamber is negative, the rotating speed of the compressor is reduced by a second rotating speed value.
As one of alternative embodiments, the first set range is from-0.1 ℃/min to +0.1 ℃/min.
It is worth explaining that the refrigerating capacity in the compartment can be adjusted by adjusting the rotating speed of the compressor and the volume of the variable volume cavity in the compressor, so that the temperature change rate in the compartment is stabilized within a set range, constant-temperature refrigeration is realized, and the energy consumption of the refrigerator is reduced.
It should be noted that, the specific processes and descriptions of the constant temperature refrigeration method for the refrigerator provided in this embodiment may refer to the related embodiments of the refrigerator provided above, and are not described herein again.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A refrigerator, characterized by comprising:
the box body is internally provided with a first chamber;
the refrigerating system is arranged in the box body and used for refrigerating the first compartment, the refrigerating system comprises a compressor, the compressor comprises a compression component, a containing cavity and a containing cavity adjusting mechanism used for adjusting the volume of the containing cavity, and the containing cavity is communicated with an air cylinder in the compression component;
the temperature sensor module is used for detecting the ambient temperature and the temperature of the first chamber;
a controller connected with the compressor and the temperature sensor module, configured to:
acquiring the temperature of the first chamber in real time;
when the starting condition is determined to be met, controlling the compressor to start to operate; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber;
after the compressor is started for a preset time, acquiring the temperature change rate of the first chamber;
if the first condition is determined not to be met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and re-acquiring the temperature change rate of the first chamber after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range;
if the second condition is determined to be met, the current environment temperature is obtained, and the volume of the accommodating cavity is controlled to be adjusted by the accommodating cavity adjusting mechanism according to the current environment temperature and the temperature change rate of the first chamber, so that the temperature change rate of the first chamber is in the first set range.
2. The refrigerator according to claim 1, wherein if it is determined that the second condition is satisfied, acquiring a current ambient temperature, and controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the current ambient temperature and the temperature change rate of the first compartment, so that the temperature change rate of the first compartment is within the first set range, comprises:
if the second condition is determined to be met, acquiring the current ambient temperature;
determining a target cavity volume corresponding to the current ambient temperature according to a preset corresponding relation between the ambient temperature and the cavity volume;
controlling the cavity adjusting mechanism to adjust the volume of the cavity to the target cavity volume;
after the preset time, acquiring the temperature change rate of the first chamber again;
if the temperature change rate of the first chamber is determined not to be in the first set range, controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first chamber, and obtaining the temperature change rate of the first chamber again until the temperature change rate of the first chamber is in the first set range.
3. The refrigerator according to claim 2, wherein the controlling the cavity adjusting mechanism to adjust the volume of the cavity according to the temperature change rate of the first compartment specifically comprises:
when the temperature change rate of the first compartment is positive, controlling the cavity adjusting mechanism to reduce the volume of the cavity by a first volume;
and when the temperature change rate of the first chamber is negative, controlling the cavity adjusting mechanism to increase the volume of the cavity by a second volume.
4. The refrigerator according to any one of claims 1 to 3, wherein a second compartment is further provided in the cabinet, and an upper temperature limit value of the first compartment is smaller than that of the second compartment; the refrigerating system is also used for refrigerating the second chamber; the temperature sensor module is also used for detecting the temperature of the second chamber;
the starting-up condition further comprises that the temperature of the second chamber is greater than the upper limit value of the temperature of the second chamber;
the refrigerator also comprises an adjustable air door which is arranged at the air channel communication position of the first chamber and the second chamber and is used for adjusting the air quantity entering the second chamber;
the controller is further configured to:
acquiring the temperature of the second chamber in real time;
when the first condition is determined to be met, if the temperature of the second chamber is determined not to be in a second set range, the opening degree of the adjustable air door is adjusted according to the size relation between the temperature of the second chamber and the second set range until the temperature of the second chamber is in the second set range.
5. The refrigerator according to claim 4, wherein the adjusting the opening of the damper according to the relationship between the temperature of the second compartment and the second setting range comprises:
when the temperature of the second compartment is greater than the upper limit value of the second set range, the opening degree of the adjustable air door is adjusted upwards by a first opening value;
and when the temperature of the second compartment is greater than the lower limit value of the second set range, the opening degree of the adjustable air door is adjusted downwards by a second opening value.
6. The refrigerator according to claim 4, wherein the second setting range is-1 ℃ to +1 ℃.
7. The refrigerator of claim 4, wherein prior to the obtaining the temperature of the first compartment in real-time, the controller is further configured to:
when the refrigerator is powered on, the adjustable air door is adjusted to an initial opening degree, the volume of the accommodating cavity is adjusted to an initial volume, the compressor is adjusted to an initial rotating speed, and the temperature of the second compartment is detected after a preset time;
if the temperature of the second compartment is determined to be within a second set temperature range, closing the adjustable air door, and detecting the temperature of the first compartment after preset time;
and if the temperature of the first compartment is determined to be within a preset shutdown temperature range, controlling the compressor to shut down.
8. The refrigerator according to claim 1, wherein the adjusting the rotation speed of the compressor according to the temperature change rate of the first compartment specifically comprises:
when the temperature change rate of the first chamber is positive, the rotating speed of the compressor is adjusted to a first rotating speed value;
and when the temperature change rate of the first chamber is negative, the rotating speed of the compressor is reduced by a second rotating speed value.
9. The refrigerator according to claim 1, wherein the first set range is-0.1 ℃/min to +0.1 ℃/min.
10. A constant temperature refrigeration method of a refrigerator is characterized by comprising the following steps:
acquiring the temperature of a first chamber of the refrigerator in real time;
when the starting condition is determined to be met, controlling a compressor of the refrigerator to start to operate; wherein the starting-up condition comprises that the temperature of the first chamber is greater than the upper limit value of the temperature of the first chamber;
after the compressor is started for a preset time, acquiring the temperature change rate of the first chamber;
if the first condition is determined not to be met, adjusting the rotating speed of the compressor according to the temperature change rate of the first chamber, and re-acquiring the temperature change rate of the first chamber after preset time until the first condition or the second condition is met; the first condition is that the temperature change rate of the first chamber is within a first set range, and the second condition is that the current rotating speed of the compressor reaches the lowest rotating speed and the temperature change rate of the first chamber is lower than the lower limit value of the first set range;
if the second condition is determined to be met, acquiring the current environment temperature, and controlling a cavity adjusting mechanism of the compressor to adjust the volume of a cavity of the compressor according to the current environment temperature and the temperature change rate of the first chamber so as to enable the temperature change rate of the first chamber to be within the first set range; wherein, the cavity is communicated with a cylinder in a compression component of the compressor.
CN202110650208.8A 2021-06-10 2021-06-10 Refrigerator and constant-temperature refrigeration method thereof Active CN113915900B (en)

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