CN113915889B - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN113915889B CN113915889B CN202110473794.3A CN202110473794A CN113915889B CN 113915889 B CN113915889 B CN 113915889B CN 202110473794 A CN202110473794 A CN 202110473794A CN 113915889 B CN113915889 B CN 113915889B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
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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
- F25D2600/00—Control issues
- F25D2600/02—Timing
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
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- 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
Abstract
The present invention relates to a refrigerator and a control method thereof, the refrigerator including: a box body; a compressor; a compartment temperature detection device; a controller configured to: controlling the compressor to run at an initial rotating speed when the compressor is powered on; detecting whether the temperature in the core control room reaches the preset stop point temperature, if so, controlling the compressor to stop running and calculating the running time of the compressor; comparing the running time with a preset time range, if the running time is greater than the preset time range, increasing the rotating speed of the compressor, if the running time is less than the preset time range, decreasing the rotating speed of the compressor, and if the running time is within the preset time range, controlling the rotating speed of the compressor to be unchanged; and detecting whether the temperature in the core control room reaches the preset starting point temperature, if so, controlling the compressor to start and operate at a new rotating speed, and returning to the step of detecting whether the temperature in the core control room reaches the preset stopping point temperature. The invention can reduce the running noise of the refrigerator.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a control method thereof.
Background
With the increase of urban population and the development of compact housing in China, the refrigerator is quite popular in the society of China, the use places of the refrigerator are not limited to kitchens and storerooms, more users place the refrigerator in living rooms or even bedrooms, and the problem of compressor noise caused by frequent start and stop of the compressor is found to be particularly prominent through investigation.
At present, a variable frequency compressor of a refrigerator is started when the indoor temperature reaches a set starting point temperature, and the variable frequency compressor is stopped when the indoor temperature reaches a set stopping point temperature, so that circulating refrigeration is realized. In the process of implementing the invention, in the existing refrigerator, because the rotating speed of the compressor is controlled according to the ambient temperature, the higher the ambient temperature is, the larger the corresponding operating rotating speed of the variable frequency compressor is, when the ambient temperature is higher, the refrigeration cycle of the refrigerator is short, the variable frequency compressor can be frequently started and stopped, and due to the existence of the rotational inertia of the core, at the moment of starting and stopping the variable frequency compressor, the core of the compressor is in an unbalanced state, the vibration and the noise of the variable frequency compressor can obviously fluctuate, and meanwhile, the instantaneous change of the load of the refrigeration system can increase the vibration and the noise value, so the noise fluctuation of the existing refrigerator is obvious, and extremely poor user experience is brought to users.
Disclosure of Invention
The embodiment of the invention provides a refrigerator and a control method thereof, which can enable the running time of a compressor in each refrigeration cycle to be stable within a preset time range, thereby avoiding the noise problem caused by frequent starting and stopping or long-time non-stopping of the compressor.
An embodiment of the present invention provides a refrigerator including:
the refrigerator comprises a box body, a door and a door, wherein at least one refrigerating chamber for storing articles is arranged in the box body, and one refrigerating chamber in the box body is a core control chamber;
a compressor;
room temperature detection means for detecting a temperature inside the core control room;
a controller connected with the compressor and the compartment temperature detection device, and configured to:
controlling the compressor to operate at an initial rotating speed when the compressor is powered on;
detecting whether the temperature in the core control room reaches a preset stop point temperature, controlling the compressor to stop running and calculating the running time of the compressor when the temperature in the core control room reaches the preset stop point temperature;
judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor;
and detecting whether the temperature in the core control room reaches a preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches a preset stopping point temperature.
As an improvement of the above scheme, the refrigerator further comprises an ambient temperature detection device for detecting the current ambient temperature of the refrigerator;
the controller is also connected with the environment temperature detection device, and is configured to acquire the initial rotating speed by the following means:
and determining the rotating speed corresponding to the current environment temperature as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
As an improvement of the above scheme, the increasing of the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
As an improvement of the above scheme, the reducing the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
As an improvement of the above scheme, the starting value of the preset time range is equal to the difference between the optimal working time and the preset time variation;
the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation;
when the refrigerator is at a preset ambient temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset ambient temperature, the optimal working time is the working time of the compressor in the process that the temperature of the core control chamber is reduced from a preset starting point to a preset stopping point.
Another embodiment of the present invention provides a method for controlling a refrigerator, including:
controlling a compressor of the refrigerator to operate at an initial rotating speed when the refrigerator is powered on;
detecting whether the temperature in a core control room of the refrigerator reaches a preset stop point temperature or not, controlling the compressor to stop running and calculating the running time of the compressor when the temperature in the core control room of the refrigerator is detected to be the preset stop point temperature;
judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor;
and detecting whether the temperature in the core control room reaches a preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches the preset stopping point temperature.
As an improvement of the above scheme, the initial rotation speed is obtained by:
detecting the current ambient temperature of the refrigerator;
and determining the rotating speed corresponding to the current environment temperature of the refrigerator as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
As an improvement of the above scheme, the increasing of the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
As an improvement of the above scheme, the reducing the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
As an improvement of the above solution, the starting value of the preset time range is equal to the difference between the optimal working time and the preset time variation;
the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation;
when the refrigerator is at a preset ambient temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset ambient temperature, the optimal working time is the working time of the compressor in the process that the temperature of the core control chamber is reduced from a preset starting point to a preset stopping point.
Compared with the prior art, according to the refrigerator and the control method thereof provided by the embodiment, when the refrigerator is powered on, the compressor is controlled to operate at an initial rotating speed, whether the temperature in the core control room reaches the preset shutdown point temperature is detected, when the compressor stops operating, the current operating time of the compressor is calculated, then the size relation between the current operating time and the preset time range is judged, if the current operating time is larger than the preset time range, the current rotating speed of the compressor is increased to obtain a new rotating speed of the compressor, if the current operating time is smaller than the preset time range, the current rotating speed of the compressor is decreased to obtain a new rotating speed of the compressor, if the current operating time is in the preset time range, the current rotating speed of the compressor is used as a new rotating speed of the compressor, then whether the temperature in the core control room reaches the preset startup point temperature is detected, and if the current operating speed of the compressor is detected, the compressor is controlled to start operating at the new rotating speed of the compressor, and the step of detecting whether the temperature in the core control room reaches the preset shutdown point temperature is returned to realize the refrigeration cycle. According to the refrigerator and the control method thereof provided by the embodiment, after each refrigeration cycle is completed, the rotating speed of the compressor in the next refrigeration cycle is dynamically adjusted according to the size relation between the running time of the compressor in the refrigeration cycle and the preset time range, and finally the running time of the compressor in each refrigeration cycle is stabilized in the preset time range, so that the compressor can be effectively prevented from being frequently started and stopped or not stopped for a long time, the noise problem caused by the frequent start and stop or the non-stop of the compressor for a long time is avoided, and the electricity-saving performance of the refrigerator can be improved.
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 flowchart illustrating a control method of a refrigerator according to an embodiment of the present invention;
fig. 3 is a specific flowchart of a control 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 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 making any creative effort, shall fall within the protection scope of the present invention.
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 present embodiment provides a refrigerator, including:
the refrigerator comprises a box body, a door and a door, wherein at least one refrigerating chamber for storing articles is arranged in the box body, and one refrigerating chamber in the box body is a core control chamber;
a compressor;
room temperature detection means for detecting a temperature inside the core control room;
a controller connected with the compressor and the compartment temperature detection device, and configured to:
s11, controlling the compressor to run at an initial rotating speed when the power is on;
s12, detecting whether the temperature in the core control room reaches a preset stop point temperature, controlling the compressor to stop running when yes is detected, and calculating the running time of the compressor;
s13, judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor;
and S14, detecting whether the temperature in the core control room reaches the preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches the preset stopping point temperature, so as to execute the steps S12 to S14 again.
It can be understood that the compressor in the refrigerator is a variable frequency compressor, and the working principle and the function thereof are the prior art and are not described herein.
It should be noted that the initial rotation speed and the preset time range may be set according to actual requirements, and are not limited herein.
For example, the preset shutdown point temperature and the preset startup point temperature may be set according to an actual refrigeration gear of the refrigerator, and are not limited herein.
It should be noted that, in this embodiment, after the compressor is started, whether the temperature in the core control room reaches the preset shutdown point temperature is detected in real time, and when yes is detected, the compressor is controlled to stop running, at this time, the refrigerator completes a refrigeration cycle, and in the step S12, the running time of this time refers to the running time of the compressor in this refrigeration cycle.
It should be noted that, taking the control rule of the variable frequency compressor of a certain type of refrigerator as an example, the start and stop of the compressor of the refrigerator, determining a 'start point' and a 'shut-off point' by detecting the difference between the actual temperature of a compartment and the set temperature, and the temperature control table is as follows, for example, when the refrigerating gear is set to 5 ℃, the variable temperature gear is set to-5 ℃, and the freezing gear is set to-20 ℃, the refrigerating "start point" temperature is 6.5 ℃, the variable temperature "start point" temperature is-3.5 ℃, the freezing "start point" temperature is-18.5 ℃, and when the actual temperature in any compartment meets the corresponding "start point" temperature, the variable frequency compressor starts to operate; similarly, the temperature of the refrigerating 'stop point' is 2.5 ℃, the temperature of the variable-temperature 'stop point' is-5.5 ℃, the temperature of the freezing 'stop point' is-22.5 ℃, and when the actual temperatures of all the compartments all meet the corresponding 'stop point' temperature, the variable-frequency compressor is stopped. According to the control rules, in the prior art, when the indoor temperature reaches the set temperature 'starting point', the variable frequency compressor is immediately started, the rotating speed of the variable frequency compressor is controlled mainly by detecting the ambient temperature, and different ambient temperatures correspond to different rotating speeds of the compressor; when the indoor temperature reaches the set temperature "shutdown point" time-varying frequency compressor will shut down immediately, until the incasement temperature rises back to set temperature "startup point", accomplish a refrigeration cycle, follow-up refrigeration cycle is whole according to this control, therefore, when ambient temperature is higher, the variable frequency compressor of refrigerator will frequently start, stop, refrigeration cycle is short, the noise fluctuation is obvious, bring very poor user experience for the user, and, it matches same control rule all to be same model platform variable frequency compressor in the trade, do not consider the individual difference between the box, for example: the condition that frequent start-up of variable frequency compressor, stop of variable frequency compressor such as door seal leaks cold, bubble material local filling is not abundant, frosting (can lead to refrigerating system to fall the difference in temperature) in the evaporimeter work engineering, that is to say current variable frequency compressor control mode, can't control according to the indoor true needs cold volume of room, and is intelligent relatively poor.
Compared with the prior art, according to the refrigerator provided by the embodiment, after each refrigeration cycle is completed, the rotating speed of the compressor in the next refrigeration cycle is dynamically adjusted according to the size relation between the running time of the compressor in the refrigeration cycle and the preset time range, even under the conditions of different environmental temperatures, different refrigerator bodies, different evaporator frost layers and the like, the running time of the compressor in each refrigeration cycle can be finally stabilized in the preset time range, so that the refrigerating capacity of the variable frequency compressor can be adjusted by intelligently identifying the cold requirement condition in the refrigerator room, the compressor can be effectively prevented from being frequently started and stopped or not being stopped for a long time, the noise problem caused by frequent starting and stopping or long-time non-stopping of the compressor is avoided, and the power saving performance of the refrigerator can be improved.
Illustratively, when a plurality of compartments exist in the refrigerator, in order to ensure the freezing effect of frozen food, the freezing compartment serves as a core control compartment of the refrigerator, when the compartments for temperature change, refrigeration and the like reach corresponding 'starting point' temperatures in the shutdown stage, the variable frequency compressor also keeps the shutdown state until the freezing compartment reaches the 'starting point' temperature, the variable frequency compressor is started, and the refrigeration of the compartments for temperature change, refrigeration and the like is postponed until the variable frequency compressor is started, namely the refrigeration of the compartments for temperature change, refrigeration and the like is only carried out under the condition of refrigeration of the freezing compartment.
As one optional embodiment, the refrigerator further comprises an ambient temperature detection device, configured to detect a current ambient temperature of the refrigerator;
the controller is further connected to the ambient temperature detection device, and the controller is configured to acquire the initial rotation speed by:
and determining the rotating speed corresponding to the current environment temperature as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
In this embodiment, the initial rotation speed of the compressor is specifically determined according to the current ambient temperature of the refrigerator, so that the actual required cooling capacity of the refrigerator can be used to control the operation of the compressor, and the refrigeration efficiency is improved.
For example, the correspondence relationship between the ambient temperature and the rotation speed may be specifically set as shown in table 1.
TABLE 1
| Ambient temperature Th (. Degree. C.) | PWM frequency (Hz) | Rotational speed (rpm) | |
| 39＜Th | 100Hz | 3000rpm | |
| 29＜Th≤39 | | 2700rpm | |
| 22＜Th≤29 | 80Hz | 2400rpm | |
| 13＜Th≤22 | 70Hz | 2100rpm | |
| Th≤13 | 60Hz | 1800rpm |
As one optional implementation, the increasing the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
In this embodiment, specifically, according to a preset rotation speed gear table, the rotation speed of the compressor is increased by one gear to realize fine adjustment of the rotation speed of the compressor, and in the specific implementation, the rotation speed gear of the rotation speed gear table can be infinitely subdivided to realize stepless speed change of the compressor, so that the phenomenon that the operation time of the compressor changes too fast each time due to too large rotation speed adjustment can be avoided, and the stability of the operation time of the compressor in each refrigeration cycle can be ensured.
As one optional implementation, the current rotation speed of the compressor is reduced to obtain a new rotation speed of the compressor, specifically:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
In this embodiment, specifically, according to a preset rotation speed gear table, the rotation speed of the compressor is adjusted to be lower by one gear to realize fine adjustment of the rotation speed of the compressor, and in the specific implementation, the rotation speed gear of the rotation speed gear table can be infinitely subdivided to realize stepless speed change of the compressor, so that the phenomenon that the operation time of the compressor changes too fast each time due to too large rotation speed adjustment can be avoided, and the stability of the operation time of the compressor in each refrigeration cycle can be ensured.
For example, the operating speed of the compressor of the present embodiment may be set as shown in table 2.
TABLE 2
As an optional implementation manner, the starting value of the preset time range is equal to the difference between the optimal working time and the preset time variation;
the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation;
when the refrigerator is at a preset ambient temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset ambient temperature, the optimal working time is the working time of the compressor in the process that the temperature of the core control chamber is reduced from a preset starting point to a preset stopping point.
Illustratively, the preset ambient temperature may be an intermediate value of the human body comfort temperature, for example, 20 ℃.
It should be noted that the optimal working time can be obtained by performing a test in a laboratory, and is not limited herein.
In a specific embodiment, the preset time variation may be equal to the optimal operating time, minus the operating time of the compressor during the process of decreasing the temperature of the core control room from the preset startup point temperature to the preset shutdown point temperature when the rotating speed of the compressor is the highest rotating speed in the high-efficiency rotating speed interval. For example, at a ring temperature of 20 ℃, the maximum efficiency rotation speed of the matching compressor is 2400rpm, the refrigerator is set at an intelligent gear (i.e., freezing chamber-18 ℃ and refrigerating chamber 5 ℃), the optimal operating time T is 25min, and the high efficiency rotation speed interval of the compressor is 1200-3000rpm according to the compressor parameter table shown in the following table 3, and if the operating time T1 is 20min at the maximum rotation speed of this interval (3000 rpm in the above example), the preset time variation Δ T = T-T1=5min, so the starting value T1=20min and the final value T2=30min of the preset time range are obtained.
In this embodiment, by setting the initial value of the preset time range to be equal to the difference between the optimal operating time and the preset time variation, and the final value of the preset time range to be equal to the sum of the optimal operating time and the preset time variation, the rotating speed of the inverter compressor can be controlled in the range with higher efficiency under the condition of most users, so as to ensure the refrigeration efficiency of the refrigerator, and as can be seen from the following table 3, the rotating speed of the compressor in the high-efficiency rotating speed interval is relatively lower in the inverter compressor, and the lower the rotating speed of the inverter compressor, the lower the noise is, so that the lower the operating noise of the compressor can be effectively ensured.
TABLE 3
Fig. 2 is a schematic flow chart of a control method of a refrigerator according to an embodiment of the present invention.
The embodiment of the invention provides a control method of a refrigerator, which comprises the following steps:
s21, controlling a compressor of the refrigerator to run at an initial rotating speed when the refrigerator is powered on;
s22, detecting whether the temperature in a core control room of the refrigerator reaches a preset stop point temperature or not, controlling the compressor to stop running and calculating the running time of the compressor when the temperature in the core control room of the refrigerator is detected to be the preset stop point temperature;
s23, judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor;
and S24, detecting whether the temperature in the core control room reaches the preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches the preset stopping point temperature, so as to execute the steps S22 to S24 again.
It should be noted that the initial rotation speed and the preset time range may be set according to actual requirements, and are not limited herein.
For example, the preset shutdown point temperature and the preset startup point temperature may be set according to an actual refrigeration gear of the refrigerator, and are not limited herein.
It should be noted that, in this embodiment, after the compressor is started, it is detected in real time whether the temperature in the core control room reaches the preset shutdown point temperature, and when it is detected that the temperature in the core control room reaches the preset shutdown point temperature, the compressor is controlled to stop operating, at this time, the refrigerator completes a refrigeration cycle, and in the step S22, the operation time refers to the operation time of the compressor in the refrigeration cycle.
It should be noted that, taking the control rule of the variable frequency compressor of a certain type of refrigerator as an example, starting and stopping the compressor of the refrigerator, determining a starting point and a shutdown point by detecting the difference between the actual temperature of a compartment and the set temperature, and setting a temperature control table as the following table, for example, when a refrigerating gear is set to be 5 ℃, a temperature changing gear is set to be-5 ℃, and a freezing gear is set to be-20 ℃, the temperature of the refrigerating starting point is 6.5 ℃, the temperature of the temperature changing starting point is-3.5 ℃, the temperature of the freezing starting point is-18.5 ℃, and when the actual temperature in any compartment meets the temperature corresponding to the starting point, the variable frequency compressor starts to operate; similarly, the temperature of the refrigerating 'stop point' is 2.5 ℃, the temperature of the variable-temperature 'stop point' is-5.5 ℃, the temperature of the freezing 'stop point' is-22.5 ℃, and when the actual temperatures of all the compartments all meet the corresponding 'stop point' temperature, the variable-frequency compressor is stopped. According to the control rules, in the prior art, when the indoor temperature reaches the set temperature 'starting point', the variable frequency compressor is immediately started, the rotating speed of the variable frequency compressor is controlled mainly by detecting the ambient temperature, and different ambient temperatures correspond to different rotating speeds of the compressor; when the indoor temperature reaches the set temperature "shutdown point" time-varying frequency compressor will shut down immediately, until the incasement temperature rises back to set temperature "startup point", accomplish a refrigeration cycle, follow-up refrigeration cycle is whole according to this control, therefore, when ambient temperature is higher, the variable frequency compressor of refrigerator will frequently start, stop, refrigeration cycle is short, the noise fluctuation is obvious, bring very poor user experience for the user, and, it matches same control rule all to be same model platform variable frequency compressor in the trade, do not consider the individual difference between the box, for example: the condition that frequent start-up of variable frequency compressor, stop of variable frequency compressor such as door seal leaks cold, bubble material local filling is not abundant, frosting (can lead to refrigerating system to fall the difference in temperature) in the evaporimeter work engineering, that is to say current variable frequency compressor control mode, can't control according to the indoor true needs cold volume of room, and is intelligent relatively poor.
Compared with the prior art, the control method of the refrigerator provided by the embodiment dynamically adjusts the rotating speed of the compressor in the next refrigerating cycle according to the size relation between the running time of the compressor in the refrigerating cycle and the preset time range after the completion of each refrigerating cycle, and finally can stabilize the running time of the compressor in each refrigerating cycle within the preset time range even under the conditions of different environmental temperatures, different refrigerator bodies, different evaporator frost layers and the like, so that the refrigerating capacity of the variable frequency compressor can be adjusted by intelligently identifying the indoor cold requirement condition of the refrigerator room, the compressor can be effectively prevented from being frequently started or stopped for a long time, the noise problem caused by frequent starting or stopping of the compressor can be avoided, and the power saving performance of the refrigerator can be improved.
Illustratively, when a plurality of compartments exist in the refrigerator, in order to ensure the freezing effect of frozen food, the freezing compartment is used as a core control compartment of the refrigerator, when the compartments with variable temperature, cold storage and the like reach corresponding 'starting point' temperatures in the shutdown stage, the variable frequency compressor also keeps the shutdown state until the freezing compartment reaches the 'starting point' temperature, the variable frequency compressor is started, and the refrigeration of the compartments with variable temperature, cold storage and the like is delayed until the variable frequency compressor is started, namely the refrigeration of the compartments with variable temperature, cold storage and the like is only carried out under the condition of refrigeration of the freezing compartment.
As one optional implementation, the initial rotation speed is obtained specifically by:
detecting the current ambient temperature of the refrigerator;
and determining the rotating speed corresponding to the current environment temperature of the refrigerator as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
In this embodiment, specifically, the initial rotation speed of the compressor is determined according to the current ambient temperature of the refrigerator, so that the actual required cooling capacity of the refrigerator can be used to control the operation of the compressor, and the refrigeration efficiency is improved.
For example, the correspondence relationship between the ambient temperature and the rotation speed may be specifically set as shown in table 1.
As an improvement of the above scheme, the increasing of the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
In this embodiment, specifically, according to a preset rotation speed gear table, the rotation speed of the compressor is increased by one gear to realize fine adjustment of the rotation speed of the compressor, and when the rotation speed gear of the rotation speed gear table is infinitely fine, even stepless speed change of the compressor can be realized, so that the phenomenon that the operation time of the compressor changes too fast each time due to too large rotation speed adjustment can be avoided, and the stability of the operation time of the compressor in each refrigeration cycle can be ensured.
As an improvement of the above scheme, the reducing the current rotation speed of the compressor to obtain a new rotation speed of the compressor specifically includes:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
In this embodiment, specifically, according to a preset rotation speed gear table, the rotation speed of the compressor is adjusted to be lower by one gear to realize fine adjustment of the rotation speed of the compressor, and in the specific implementation, the rotation speed gear of the rotation speed gear table can be infinitely subdivided to realize stepless speed change of the compressor, so that the phenomenon that the operation time of the compressor changes too fast each time due to too large rotation speed adjustment can be avoided, and the stability of the operation time of the compressor in each refrigeration cycle can be ensured.
For example, the operating speed of the compressor of the present embodiment may be set as shown in table 2.
As an improvement of the above scheme, the starting value of the preset time range is equal to the difference between the optimal working time and the preset time variation;
the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation;
when the refrigerator is at a preset ambient temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset ambient temperature, the optimal working time is the working time of the compressor in the process that the temperature of the core control chamber is reduced from a preset starting point to a preset stopping point.
Illustratively, the preset ambient temperature may be an intermediate value of the human body comfort temperature, for example, 20 ℃.
It should be noted that the optimal working time can be obtained by performing a test in a laboratory, and is not limited herein.
In a specific embodiment, the preset time variation may be equal to the optimal operating time, minus the operating time of the compressor during the process of decreasing the temperature of the core control room from the preset startup point temperature to the preset shutdown point temperature when the rotating speed of the compressor is the highest rotating speed in the high-efficiency rotating speed interval. For example, at a 20 ℃ ring temperature, the maximum efficiency rotating speed of the matching compressor is 2400rpm, the refrigerator is set at an intelligent gear (i.e. freezing chamber-18 ℃, refrigerating chamber 5 ℃), the optimal operating time T is 25min, and the high efficiency rotating speed interval of the compressor is 1200-3000rpm according to the compressor parameter table shown in the following table 3, and if the operating time T1 is 20min at the maximum rotating speed of this interval (3000 rpm in the above example), the preset time variation Δ T = T-T1=5min, so the starting value T1=20min of the preset time range and the final value T2=30min of the preset time range.
In this embodiment, through setting up the initial value of presetting the time span equals best operating time and presets the time variation difference, the final value of presetting the time span equals best operating time with predetermine the sum of time variation, can guarantee that inverter compressor controls in the higher scope of efficiency at most user service condition rotational speed to the refrigeration efficiency of refrigerator has been guaranteed, and, as can be seen from table 3 below, the rotational speed that the compressor is in the interval of high efficiency rotational speed is the relatively lower rotational speed in inverter compressor, and the lower noise of inverter compressor rotational speed is less, consequently can also effectively guarantee simultaneously that the running noise of compressor is lower.
In a specific embodiment, referring to fig. 3, a specific flow of the control method of the refrigerator provided in this embodiment is as follows:
step 1: after the temperature of the compartment is stabilized, the inverter compressor is stopped, when the temperature in the freezing compartment is increased back to the preset starting point temperature, the inverter compressor is controlled to be started, and the environment temperature is detected to be 25 ℃, so that the inverter compressor runs at 80Hz (2400 rpm);
step 2: when the compartment temperature is detected to reach the preset stop point temperature, the compressor is controlled to stop, t1=20min and t2=30min are set, and the running time of the frequency conversion compressor in the last period is detected before the next refrigeration period starts to serve as the running time of the compressor;
and step 3: judging the size relation between the current running time and a preset time range t 1-t 2:
(1) When the running time of the inverter compressor is more than 30min, the next-period compressor is increased to operate at 90Hz (2700 rpm), if the running time of the inverter compressor in the previous period is still more than 30min, the next-period compressor is increased to operate at 100Hz (3000 rpm) again until the running time of the previous period is between 20 and 30min, and the operation is circulated in sequence;
(2) When the running time of the inverter compressor is between 20min and 30min, the next cycle of running gears is equal to the last cycle of running rotating speed of 80Hz (2400 rpm), and the operation is circulated in sequence;
(3) When the running time of the inverter compressor is less than 20min, the next period of the inverter compressor is reduced to operate at 70Hz (2100 rpm), if the running time of the inverter compressor in the previous period is still less than 20min, the next period of the inverter compressor is reduced to operate at 60Hz (1800 rpm) again, and the operation is circulated in sequence until the running time of the previous period is between 20min and 30min.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
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 (8)
1. A refrigerator, characterized by comprising:
the refrigerator comprises a box body, a door and a door, wherein at least one refrigerating chamber for storing articles is arranged in the box body, and one refrigerating chamber in the box body is a core control chamber;
a compressor;
a compartment temperature detection means for detecting a temperature within the core control compartment;
a controller connected with the compressor and the compartment temperature detection device, and configured to:
controlling the compressor to run at an initial rotating speed when the compressor is powered on;
detecting whether the temperature in the core control room reaches a preset stop point temperature, controlling the compressor to stop running when the temperature in the core control room reaches the preset stop point temperature, and calculating the running time of the compressor;
judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor; wherein, the initial value of the preset time range is equal to the difference between the optimal working time and the preset time variation; the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation; the optimal working time is the working time of the compressor in the process that the temperature of the core control compartment is reduced from the preset starting point temperature to the preset stopping point temperature when the refrigerator is at the preset environment temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset environment temperature;
and detecting whether the temperature in the core control room reaches a preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches a preset stopping point temperature.
2. The refrigerator according to claim 1, wherein the refrigerator further comprises an ambient temperature detecting means for detecting an ambient temperature at which the refrigerator is currently located;
the controller is also connected with the environment temperature detection device, and is configured to acquire the initial rotating speed by the following means:
and determining the rotating speed corresponding to the current environment temperature as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
3. The refrigerator as claimed in claim 1, wherein said increasing the current speed of the compressor to obtain a new speed of the compressor comprises:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
4. The refrigerator as claimed in claim 1, wherein said reducing the current speed of the compressor to obtain a new compressor speed is:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
5. A control method of a refrigerator, comprising:
controlling a compressor of the refrigerator to operate at an initial rotating speed when the refrigerator is powered on;
detecting whether the temperature in a core control room of the refrigerator reaches a preset stop point temperature or not, controlling the compressor to stop running and calculating the running time of the compressor when the temperature in the core control room of the refrigerator is detected to be the preset stop point temperature;
judging the size relation between the current running time and a preset time range, if the current running time is larger than the preset time range, increasing the current rotating speed of the compressor to obtain a new rotating speed of the compressor, if the current running time is smaller than the preset time range, decreasing the current rotating speed of the compressor to obtain the new rotating speed of the compressor, and if the current running time is within the preset time range, taking the current rotating speed of the compressor as the new rotating speed of the compressor; wherein, the initial value of the preset time range is equal to the difference between the optimal working time and the preset time variation; the final value of the preset time range is equal to the sum of the optimal working time and the preset time variation; the optimal working time is the working time of the compressor in the process that the temperature of the core control chamber is reduced from the preset starting point temperature to the preset stopping point temperature when the refrigerator is at the preset environment temperature and the rotating speed of the compressor is the highest efficiency rotating speed corresponding to the preset environment temperature;
and detecting whether the temperature in the core control room reaches a preset starting point temperature, controlling the compressor to start running at the new compressor rotating speed when the temperature in the core control room reaches the preset starting point temperature, and returning to the step of detecting whether the temperature in the core control room reaches the preset stopping point temperature.
6. The method of claim 5, wherein the initial rotation speed is obtained by:
detecting the current ambient temperature of the refrigerator;
and determining the rotating speed corresponding to the current environment temperature of the refrigerator as the initial rotating speed of the compressor according to the corresponding relation between the preset environment temperature and the rotating speed.
7. The method for controlling a refrigerator according to claim 5, wherein the current rotational speed of the compressor is increased to obtain a new rotational speed of the compressor, specifically:
and adjusting the current rotating speed of the compressor to be a rotating speed higher by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
8. The method as claimed in claim 5, wherein the current speed of the compressor is reduced to obtain a new speed of the compressor, specifically:
and adjusting the current rotating speed of the compressor to be a rotating speed lower by one gear according to a preset rotating speed gear table so as to obtain a new rotating speed of the compressor.
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| CN103776234B (en) * | 2014-02-25 | 2015-09-16 | 合肥美菱股份有限公司 | A kind of refrigerator method for controlling frequency conversion and application thereof |
| WO2016182135A1 (en) * | 2015-05-11 | 2016-11-17 | Lg Electronics Inc. | Refrigerator and control method thereof |
| CN105605875B (en) * | 2016-02-01 | 2018-06-22 | 合肥美的电冰箱有限公司 | A kind of control method and system of electronics deep freezer |
| CN108195132A (en) * | 2017-12-28 | 2018-06-22 | Tcl家用电器（合肥）有限公司 | The direct-cooled frequency conversion refrigerator of single system, refrigeration control system and refrigeration control method |
| CN108759289B (en) * | 2018-05-18 | 2020-10-23 | Tcl家用电器（合肥）有限公司 | Refrigerator temperature control method and device, refrigerator and storage medium |
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Address after: 266000 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266100 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 399 Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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