CN114413543B - Refrigerator and mute control method thereof - Google Patents

Refrigerator and mute control method thereof Download PDF

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Publication number
CN114413543B
CN114413543B CN202210041684.4A CN202210041684A CN114413543B CN 114413543 B CN114413543 B CN 114413543B CN 202210041684 A CN202210041684 A CN 202210041684A CN 114413543 B CN114413543 B CN 114413543B
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China
Prior art keywords
rotating speed
compressor
fan
refrigerator
minimum value
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CN114413543A (en
Inventor
孙敬龙
齐聪山
张海鹏
潘毅广
丁龙辉
张宗鑫
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Hisense Refrigerator Co Ltd
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Hisense Refrigerator Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • F25D2201/00—Insulation
    • F25D2201/30—Insulation with respect to sound
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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

Abstract

The invention discloses a refrigerator and a mute control method thereof, which fully consider the operation conditions of the refrigerator under different working conditions by collecting refrigeration operation parameters, so as to calculate the power of a compressor and a fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at a minimum value according to the refrigeration operation parameters, and calculate the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters; then taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed; when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed. By adopting the embodiment of the invention, the mute control precision of the refrigerator can be improved, and a better energy-saving mute effect can be achieved.

Description

Refrigerator and mute control method thereof
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a mute control method thereof.
Background
With the high development of informatization, people walk into the new era of economy and tend to enjoy a high-quality life of 'health, comfort, convenience and pleasure'. While paying attention to enjoying safe and comfortable living space, a convenient living style is becoming a higher pursuit, and along with the intelligent development of the traditional home appliance manufacturing industry. The intelligent refrigerator is used as a representative of intelligent household appliances, and each large enterprise uses the intelligent refrigerator as a breakthrough product for competitive development. The intelligent refrigerator is intelligent control at first, carries out intelligent management to food, and intelligent refrigerator can switch between different modes, and the automatic adaptation is different environment, keeps food optimal storage state all the time, can monitor food quantity, quality in the refrigerator through computer or cell-phone, provides healthy recipe for the user, carries out the network through the internet and orders supplementary food material to can carry out the food sharing. Besides the above, the intelligent refrigerator also has the self-adaptive energy-saving mute function, and the working condition rotating speeds of the compressor and the fan with low energy consumption are automatically matched according to the actual working condition parameters, so that energy saving mute is realized. The existing control method is to detect the temperature of the refrigerator compartment and correspondingly adjust the compressor and the fan of the refrigerator according to the detected compartment temperature. However, the method is simpler, only the regulation and control of the compressor and the fan according to the room temperature are considered, the specific influence of the working condition parameters is not analyzed in a targeted manner, and when the method is implemented in a specific manner, the technical problems of low accuracy and poor effect on refrigerator control often exist in the existing method, and a better energy-saving silencing effect cannot be achieved.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a mute control method thereof, which can improve the mute control precision of the refrigerator and achieve a better energy-saving mute effect.
To achieve the above object, an embodiment of the present invention provides a refrigerator including:
a compressor for powering a refrigeration cycle of the refrigerator;
the fan is used for enabling air to enter an evaporator of the refrigerator to perform heat exchange and sending the air after heat release into a refrigerator compartment;
the controller is configured to:
responding to the parameter collection instruction, and collecting refrigeration operation parameters;
calculating the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed.
As an improvement of the above-described aspect, the response condition of the parameter collection instruction includes at least one of:
detecting that the refrigerator enters a refrigeration steady-state operation state;
and detecting that the refrigerator is in a refrigeration unsteady state operation state, and the temperature of the return air inlet is less than or equal to the target temperature of the compartment.
As an improvement of the above scheme, when the refrigerator is in a refrigeration steady-state operation state, the preset conditions are: the temperature of the return air inlet is greater than the target temperature of the compartment; when the refrigerator is in a refrigeration unsteady state operation state, the preset conditions are as follows: the real-time temperature of the compartment is less than the target compartment temperature.
As an improvement of the above, the controller is further configured to:
when the refrigerator is in a refrigeration steady-state operation state and does not meet preset conditions, controlling the compressor to operate according to a preset standard compressor rotating speed and controlling the fan to operate according to a preset standard fan rotating speed; and when the real-time temperature of the compartment reaches the target temperature of the compartment, controlling the compressor and the fan to stop working.
As an improvement of the above solution, the refrigeration operation parameters include a first parameter related to compressor power, and a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed; and calculating the corresponding first compressor rotating speed and first fan rotating speed when the power sum of the compressor and the fan is at the minimum value according to the refrigeration operation parameters, wherein the method comprises the following steps:
constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
calculating the power sum of the compressor and the fan according to the first functional relation and the second functional relation;
taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed.
As an improvement of the above solution, the calculating, according to the refrigeration operation parameter, the second compressor rotation speed and the second fan rotation speed corresponding to the noise at the minimum value includes:
constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan;
and calculating the corresponding compressor rotating speed to be the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and calculating the corresponding fan rotating speed to be the second fan rotating speed when the noise is at the minimum value.
As an improvement to the above, the first parameter further includes an evaporator temperature, a system pressure, and a chamber target temperature; the second parameter further comprises air outlet pressure, air return temperature and chamber target temperature.
In order to achieve the above object, the embodiment of the present invention further provides a mute control method for a refrigerator, including:
responding to the parameter collection instruction, and collecting refrigeration operation parameters of the refrigerator;
calculating the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed.
As an improvement of the above solution, the refrigeration operation parameters include a first parameter related to compressor power, and a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed; and calculating the corresponding first compressor rotating speed and first fan rotating speed when the power sum of the compressor and the fan is at the minimum value according to the refrigeration operation parameters, wherein the method comprises the following steps:
constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
calculating the power sum of the compressor and the fan according to the first functional relation and the second functional relation;
taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed.
As an improvement of the above solution, the calculating, according to the refrigeration operation parameter, the second compressor rotation speed and the second fan rotation speed corresponding to the noise at the minimum value includes:
constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan;
and calculating the corresponding compressor rotating speed to be the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and calculating the corresponding fan rotating speed to be the second fan rotating speed when the noise is at the minimum value.
Compared with the prior art, the refrigerator and the mute control method thereof disclosed by the embodiment of the invention fully consider the running conditions of the refrigerator under different working conditions by collecting the refrigerating running parameters, so as to calculate the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigerating running parameters, and calculate the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigerating running parameters; then taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed; when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed. By adopting the embodiment of the invention, the mute control precision of the refrigerator can be improved, and a better energy-saving mute effect can be achieved.
Drawings
Fig. 1 is a block diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a refrigeration system of a refrigerator according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fan in a refrigerator according to an embodiment of the present invention;
FIG. 4 is a flowchart of the operation of the controller when the refrigerator is in a refrigeration steady-state operation state according to the embodiment of the present invention;
FIG. 5 is a flowchart of the operation of the controller when the refrigerator provided by the embodiment of the invention is in a refrigeration unsteady state operation state;
fig. 6 is a flowchart of a mute control method for a refrigerator according to an embodiment of the present invention;
FIG. 7 is a flow chart of calculating a first compressor speed and a first fan speed provided by an embodiment of the present invention;
fig. 8 is a flowchart of calculating a second compressor speed and a second fan speed according to an embodiment of the present invention.
10, a compressor; 2. a condenser; 3. an anti-condensation pipe; 4. drying the filter; 5. a capillary tube; 6. an evaporator; 7. a gas-liquid separator; 20. a blower; 11. a refrigerating chamber; 12. a freezing chamber; 13. an air duct; 30. and a controller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a block diagram of a refrigerator 100 according to an embodiment of the present invention, the refrigerator 100 includes a compressor 10, a fan 20, and a controller 30, the compressor 10 provides power for a refrigeration cycle of the refrigerator 100, the fan 20 is used for making air enter an evaporator of the refrigerator to perform heat exchange and sending the air after heat release into a refrigerator compartment, and the controller 30 is used for adjusting rotation speeds of the compressor and the fan according to a refrigeration operation parameter of the refrigerator so as to achieve mute control of the refrigerator.
Referring to fig. 2, fig. 2 is a schematic view showing a structure of a refrigerating system in a refrigerator according to an embodiment of the present invention, the refrigerating system including a compressor 10, a condenser 2, an anti-condensation pipe 3, a dry filter 4, a capillary 5, an evaporator 6, and a gas-liquid separator 7. The working processes of the refrigeration system comprise a compression process, a condensation process, a throttling process and an evaporation process.
The compression process comprises the following steps: when the power line of the refrigerator is plugged in and the contact of the temperature controller is connected, the compressor 10 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 10, and the refrigerant is compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 10 and then discharged into the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas radiates heat through the condenser 2, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated steam, the saturated steam is further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as condensing temperature, and the pressure of the refrigerant in the whole condensing process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid is filtered by a dry filter 4 to remove moisture and impurities, and then flows into a capillary tube 5, throttling and depressurization are carried out through the capillary tube, and the refrigerant is changed into normal-temperature and low-pressure wet vapor; the evaporation process is as follows: the wet vapor with normal temperature and low pressure starts to absorb heat in the evaporator 6 for vaporization, so that the temperature of the evaporator and the surrounding temperature are reduced, the refrigerant is changed into low-temperature and low-pressure gas, the refrigerant coming out of the evaporator 6 returns to the compressor 10 again after passing through the gas-liquid separator 7, the process is repeated, and the heat in the refrigerator is transferred into the air outside the refrigerator, so that the purpose of refrigeration is realized.
Referring to fig. 3, fig. 3 is a schematic diagram of a position of a fan 20 in a refrigerator according to an embodiment of the present invention, where the refrigerator 100 according to an embodiment of the present invention includes a refrigerating chamber 11 and a freezing chamber 12, the fan 20 makes air continuously enter fins of the evaporator 6 to perform heat exchange, and simultaneously sends cooled air after heat release of the evaporator 6 to the refrigerating chamber 11 and the freezing chamber 12 through an air duct 13, so that air in the refrigerating chamber continuously circulates, and a purpose of reducing temperature is achieved.
The controller 30 is configured to:
responding to the parameter collection instruction, and collecting refrigeration operation parameters;
calculating the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed.
Optionally, the response condition of the parameter collection instruction includes at least one of:
detecting that the refrigerator enters a refrigeration steady-state operation state;
and detecting that the refrigerator is in a refrigeration unsteady state operation state, and the temperature of the return air inlet is less than or equal to the target temperature of the compartment.
The refrigerating steady-state operation state is an operation state of the refrigerating system in the refrigerator when the refrigerating system works normally, and the refrigerating unsteady-state operation state is an operation state of the refrigerator when the refrigerator is in a first power-on or defrosting recovery period. The refrigerator food material compartment needs to be quickly cooled during unsteady state operation, so that the compartment target temperature Ts and the return air inlet temperature Th need to be obtained for judgment, and the temperature of the refrigerator food material compartment in steady state operation reaches a set value, so that temperature judgment is not needed.
It should be noted that, certain data support is required for constructing the functional relationship, that is, parameters after a period of time of refrigerator operation need to be acquired to construct the functional relationship. For example, parameters of the refrigerator in a refrigeration steady-state operation state or a refrigeration unsteady-state operation state for 30 minutes after the refrigerator starts are taken, and then a corresponding functional relation is obtained through nonlinear fitting.
Optionally, the refrigeration operation parameters include a first parameter related to compressor power, a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed; and calculating the corresponding first compressor rotating speed and first fan rotating speed when the power sum of the compressor and the fan is at the minimum value according to the refrigeration operation parameters, wherein the method comprises the following steps:
constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
calculating the power sum of the compressor and the fan according to the first functional relation and the second functional relation;
taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed.
Illustratively, the first parameter is a parameter related to compressor power including, in addition to the real-time compressor speed Fy, the evaporator temperature Tz, the system pressure p1 and the compartment target temperature Ts. The second parameter is a parameter related to fan power, and comprises an air outlet pressure p2, an air return inlet temperature Th and a compartment target temperature Ts besides a real-time fan rotating speed Fb.
The controller 30 constructs a first functional relationship between the compressor power and the first parameter according to the real-time compressor rotation speed Fy, the evaporator temperature Tz, the system pressure P1 and the compartment target temperature Ts, satisfies py=f (Fy, tz, P1, ts), and constructs a second functional relationship between the fan power and the second parameter according to the real-time fan rotation speed Fb, the air outlet pressure P2, the return air inlet temperature Th and the compartment target temperature Ts, satisfies pb=f (Fb, P2, th, ts), the controller 30 calculates a sum of the compressor and the fan power, satisfies ppy+pb, calculates and outputs a corresponding compressor rotation speed when ppy is minimum as a first compressor rotation speed Fyp, and calculates and outputs a corresponding fan rotation speed when ppy is minimum as a first fan rotation speed Fbp.
Optionally, the calculating, according to the refrigeration operation parameter, the second compressor rotation speed and the second fan rotation speed corresponding to the noise at the minimum value includes:
constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan;
and calculating the corresponding compressor rotating speed to be the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and calculating the corresponding fan rotating speed to be the second fan rotating speed when the noise is at the minimum value.
Illustratively, the controller 30 collects the real-time compressor speed Fy, the real-time fan speed Fb, calculates a third functional relationship s=f (Fy, fb) of noise and the real-time compressor speed Fy, the real-time fan speed Fb, and the controller 30 calculates a minimum value of s=f (Fy, fb) and outputs the corresponding compressor speed as the second compressor speed Fys and the corresponding fan speed as the second fan speed Fbs.
After the first compressor speed Fyp, the first fan speed Fbp, the second compressor speed Fys and the second fan speed Fbs are calculated, the minimum value of the first compressor speed Fyp and the second compressor speed Fys is taken as the target compressor speed, and the minimum value of the first fan speed Fbp and the second fan speed Fbs is taken as the target fan speed.
It should be noted that, the fitting process of the first functional relationship may refer to a function fitting process in the prior art, in this embodiment of the present invention, the real-time compressor rotation speed Fy, the evaporator temperature Tz, the system pressure p1 and the compartment target temperature Ts may be input into a function fitting tool (such as MATLAB), and then output to obtain a first functional relationship equation, and similarly, the fitting process of the second functional relationship and the third functional relationship may also be implemented by means of a function fitting tool in the prior art. After the functional relation is obtained, the minimum value of the function, such as the minimum value of Ptotal=Py+Pb, is calculated, and the refrigeration operation parameters can be substituted into the relation, and then the minimum values are obtained by comparing in sequence.
Optionally, when the refrigerator is in a refrigeration steady-state operation state, the preset conditions are: the temperature of the return air inlet is greater than the target temperature of the compartment; when the refrigerator is in a refrigeration unsteady state operation state, the preset conditions are as follows: the real-time temperature of the compartment is less than the target compartment temperature.
When the refrigerator is in a refrigeration steady-state operation state, after the refrigeration operation parameters are collected and calculated to obtain a target compressor rotating speed and a target fan rotating speed, firstly controlling a compressor to operate according to the target compressor rotating speed, controlling the fan to operate according to the target fan rotating speed, then judging whether the return air inlet temperature Th is greater than the compartment target temperature Ts, if the return air inlet temperature Th is greater than the compartment target temperature Ts, keeping the compressor to operate according to the target compressor rotating speed, and keeping the fan to operate according to the target fan rotating speed. When the refrigerator is in a refrigeration unsteady state, judging whether the real-time temperature Tr of the compartment is smaller than the target temperature Ts of the compartment, if the real-time temperature Tr of the compartment is smaller than the target temperature Ts, controlling the compressor to operate according to the target compressor rotating speed, and controlling the fan to operate according to the target fan rotating speed.
Optionally, the controller is further configured to:
when the refrigerator is in a refrigeration steady-state operation state and does not meet preset conditions, controlling the compressor to operate according to a preset standard compressor rotating speed and controlling the fan to operate according to a preset standard fan rotating speed; and when the real-time temperature of the compartment reaches the target temperature of the compartment, controlling the compressor and the fan to stop working.
Illustratively, the standard compressor speed is 1800-2200rpm, the standard fan speed is 1000-1300rpm, and the compressor speed 1800-2200rpm and the fan speed 1000-1300rpm are experimentally verified lower noise speed combinations.
Referring to fig. 4, fig. 4 is a flowchart of the operation of the controller when the refrigerator is in a refrigeration steady-state operation state according to the embodiment of the present invention. After the refrigerator enters a refrigeration steady-state operation state, refrigeration operation parameters are collected within a period of time (30 MIN), a first functional relation Py=f (Fy, tz, p1, ts), a second functional relation Pb=f (Fb, p2, th, ts) and a third functional relation S=f (Fy, fb) are constructed, MIN (Fys, fyp) is taken as a target compressor rotating speed, the compressor is controlled to operate according to the rotating speed, MIN (Fbs, fbp) is taken as a target fan rotating speed, and the fan is controlled to operate according to the rotating speed. And then entering a temperature judging program, if the Th is more than Ts, running the compressor according to the target compressor rotating speed and running the fan according to the target fan rotating speed, and if the Th is less than or equal to Ts, reducing the compressor to the standard compressor rotating speed, such as 2000rpm, and reducing the fan to the standard fan rotating speed, such as 1200rpm. And if Tr=Ts is met, controlling the compressor and the fan to stop working.
Referring to fig. 5, fig. 5 is a flowchart of a controller when the refrigerator according to an embodiment of the present invention is in a refrigeration unsteady state operation state. After the refrigerator enters a refrigeration unsteady state of operation, firstly, entering a temperature judging program, if Th & gtTs is met, running the compressor according to the standard compressor rotating speed and running the fan according to the standard fan rotating speed, if Th & gtTs is met, collecting refrigeration operation parameters in a period of time (30 MIN), constructing a first function relation Py=f (Fy, tz, p1, ts), a second function relation Pb=f (Fb, p2, th, ts) and a third function relation S=f (Fy, fb), taking MIN (Fys, fyp) as the target compressor rotating speed and controlling the compressor to run according to the rotating speed, and taking MIN (Fbs, fbp) as the target fan rotating speed and controlling the fan to run according to the rotating speed. And if Tr=Ts is met, controlling the compressor and the fan to stop working.
Compared with the prior art, the refrigerator disclosed by the embodiment of the invention fully considers the operation conditions of the refrigerator under different working conditions by collecting the refrigeration operation parameters, so as to calculate the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculate the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters; then taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed; when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed. By adopting the embodiment of the invention, the mute control precision of the refrigerator can be improved, and a better energy-saving mute effect can be achieved.
Referring to fig. 6, fig. 6 is a flowchart of a method for controlling mute of a refrigerator according to an embodiment of the present invention, where the method for controlling mute of a refrigerator includes:
s1, responding to a parameter collection instruction, and collecting refrigeration operation parameters;
s2, calculating the power of the compressor and the power of the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power of the compressor and the fan are at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
s3, taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
and S4, when a preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed.
Specifically, in step S1, the response condition of the parameter collection instruction includes at least one of the following:
detecting that the refrigerator enters a refrigeration steady-state operation state;
and detecting that the refrigerator is in a refrigeration unsteady state operation state, and the temperature of the return air inlet is less than or equal to the target temperature of the compartment.
The refrigerating steady-state operation state is an operation state of the refrigerating system in the refrigerator when the refrigerating system works normally, and the refrigerating unsteady-state operation state is an operation state of the refrigerator when the refrigerator is in a first power-on or defrosting recovery period. The refrigerator food material compartment needs to be quickly cooled during unsteady state operation, so that the compartment target temperature Ts and the return air inlet temperature Th need to be obtained for judgment, and the temperature of the refrigerator food material compartment in steady state operation reaches a set value, so that temperature judgment is not needed.
It should be noted that, certain data support is required for constructing the functional relationship, that is, parameters after a period of time of refrigerator operation need to be acquired to construct the functional relationship. For example, parameters of the refrigerator in a refrigeration steady-state operation state or a refrigeration unsteady-state operation state for 30 minutes after the refrigerator starts are taken, and then a corresponding functional relation is obtained through nonlinear fitting.
Specifically, in step S2, the refrigeration operation parameters include a first parameter related to compressor power, a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed.
Illustratively, the first parameter is a parameter related to compressor power including, in addition to the real-time compressor speed Fy, the evaporator temperature Tz, the system pressure p1 and the compartment target temperature Ts. The second parameter is a parameter related to fan power, and comprises an air outlet pressure p2, an air return inlet temperature Th and a compartment target temperature Ts besides a real-time fan rotating speed Fb.
Referring to fig. 7, fig. 7 is a flowchart of calculating a first compressor rotation speed and a first fan rotation speed according to an embodiment of the present invention, where the calculating of the power of the compressor and the fan and the corresponding first compressor rotation speed and first fan rotation speed when they are at a minimum value according to the refrigeration operation parameters includes steps S211 to S213:
s211, constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
s212, calculating the sum of the powers of the compressor and the fan according to the first functional relation and the second functional relation;
s213, taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed.
Illustratively, a first functional relationship between the compressor power and the first parameter is constructed according to the real-time compressor rotation speed Fy, the evaporator temperature Tz, the system pressure P1 and the compartment target temperature Ts, a second functional relationship between the fan power and the second parameter is constructed according to the real-time fan rotation speed Fb, the air outlet pressure P2, the return air inlet temperature Th and the compartment target temperature Ts, a sum of the compressor and the fan power is calculated, a total of p=py+pb is satisfied, a compressor rotation speed corresponding to the total of P is calculated and output to be Fyp, and a fan rotation speed corresponding to the total of P is calculated and output to be Fbp, which is the first fan rotation speed.
Referring to fig. 8, fig. 8 is a flowchart of calculating a second compressor rotation speed and a second fan rotation speed according to an embodiment of the present invention, where the calculating, according to the refrigeration operation parameter, the second compressor rotation speed and the second fan rotation speed corresponding to when noise is at a minimum value includes steps S221 to S222:
s221, constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan;
s222, calculating that the corresponding compressor rotating speed is the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and the corresponding fan rotating speed is the second fan rotating speed when the noise is at the minimum value.
For example, the real-time compressor speed Fy and the real-time fan speed Fb are collected, the third functional relation s=f (Fy, fb) between the noise and the real-time compressor speed Fy and between the noise and the real-time fan speed Fb is calculated, the minimum value of s=f (Fy, fb) is calculated, the corresponding compressor speed is output as the second compressor speed Fys, and the corresponding fan speed is output as the second fan speed Fbs.
Specifically, in step S3, after the first compressor speed Fyp, the first fan speed Fbp, the second compressor speed Fys, and the second fan speed Fbs are calculated, the minimum value of the first compressor speed Fyp and the second compressor speed Fys is taken as the target compressor speed, and the minimum value of the first fan speed Fbp and the second fan speed Fbs is taken as the target fan speed.
It should be noted that, the fitting process of the first functional relationship may refer to a function fitting process in the prior art, in this embodiment of the present invention, the real-time compressor rotation speed Fy, the evaporator temperature Tz, the system pressure p1 and the compartment target temperature Ts may be input into a function fitting tool (such as MATLAB), and then output to obtain a first functional relationship equation, and similarly, the fitting process of the second functional relationship and the third functional relationship may also be implemented by means of a function fitting tool in the prior art. After the functional relation is obtained, the minimum value of the function, such as the minimum value of Ptotal=Py+Pb, is calculated, and the refrigeration operation parameters can be substituted into the relation, and then the minimum values are obtained by comparing in sequence.
Specifically, in step S4, when the refrigerator is in a refrigeration steady-state operation state, the preset conditions are: the temperature of the return air inlet is greater than the target temperature of the compartment; when the refrigerator is in a refrigeration unsteady state operation state, the preset conditions are as follows: the real-time temperature of the compartment is less than the target compartment temperature.
When the refrigerator is in a refrigeration steady-state operation state, after the refrigeration operation parameters are collected and calculated to obtain a target compressor rotating speed and a target fan rotating speed, firstly controlling a compressor to operate according to the target compressor rotating speed, controlling the fan to operate according to the target fan rotating speed, then judging whether the return air inlet temperature Th is greater than the compartment target temperature Ts, if the return air inlet temperature Th is greater than the compartment target temperature Ts, keeping the compressor to operate according to the target compressor rotating speed, and keeping the fan to operate according to the target fan rotating speed. When the refrigerator is in a refrigeration unsteady state, judging whether the real-time temperature Tr of the compartment is smaller than the target temperature Ts of the compartment, if the real-time temperature Tr of the compartment is smaller than the target temperature Ts, controlling the compressor to operate according to the target compressor rotating speed, and controlling the fan to operate according to the target fan rotating speed.
Optionally, the refrigerator mute control method further includes:
when the refrigerator is in a refrigeration steady-state operation state and does not meet preset conditions, controlling the compressor to operate according to a preset standard compressor rotating speed and controlling the fan to operate according to a preset standard fan rotating speed; and when the real-time temperature of the compartment reaches the target temperature of the compartment, controlling the compressor and the fan to stop working.
Illustratively, the standard compressor speed is 1800-2200rpm, the standard fan speed is 1000-1300rpm, and the compressor speed 1800-2200rpm and the fan speed 1000-1300rpm are experimentally verified lower noise speed combinations.
In specific implementation, after the refrigerator enters a refrigeration steady-state operation state, refrigeration operation parameters are collected within a period of time (30 MIN), a first functional relation py=f (Fy, tz, p1, ts), a second functional relation pb=f (Fb, p2, th, ts) and a third functional relation s=f (Fy, fb) are constructed, MIN (Fys, fyp) is taken as a target compressor rotation speed and the compressor is controlled to operate according to the rotation speed, and MIN (Fbs, fbp) is taken as a target fan rotation speed and the fan is controlled to operate according to the rotation speed. And then entering a temperature judging program, if the Th is more than Ts, running the compressor according to the target compressor rotating speed and running the fan according to the target fan rotating speed, and if the Th is less than or equal to Ts, reducing the compressor to the standard compressor rotating speed, such as 2000rpm, and reducing the fan to the standard fan rotating speed, such as 1200rpm. And if Tr=Ts is met, controlling the compressor and the fan to stop working.
When the refrigerator is in a refrigeration unsteady state, firstly, entering a temperature judging program, if Th & gtTs is met, running the compressor according to the standard compressor rotating speed and running the fan according to the standard fan rotating speed, if Th & gtTs is met, collecting refrigeration operation parameters in a period of time (30 MIN), constructing a first functional relation Py=f (Fy, tz, p1, ts), a second functional relation Pb=f (Fb, p2, th, ts) and a third functional relation S=f (Fy, fb), taking MIN (Fys, fyp) as the target compressor rotating speed, controlling the compressor to run according to the rotating speed, and taking MIN (Fbs, fbp) as the target fan rotating speed and controlling the fan to run according to the rotating speed. And if Tr=Ts is met, controlling the compressor and the fan to stop working.
Compared with the prior art, the mute control method for the refrigerator disclosed by the embodiment of the invention fully considers the running conditions of the refrigerator under different working conditions by collecting the refrigerating running parameters, so as to calculate the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigerating running parameters, and calculate the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigerating running parameters; then taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed; when the preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed. By adopting the embodiment of the invention, the mute control precision of the refrigerator can be improved, and a better energy-saving mute effect can be achieved.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (6)

1. A refrigerator, comprising:
a compressor for powering a refrigeration cycle of the refrigerator;
the fan is used for enabling air to enter an evaporator of the refrigerator to perform heat exchange and sending the air after heat release into a refrigerator compartment;
the controller is configured to:
responding to the parameter collection instruction, and collecting refrigeration operation parameters;
calculating the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
when a preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed;
the refrigeration operation parameters comprise a first parameter related to compressor power and a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed; and calculating the corresponding first compressor rotating speed and first fan rotating speed when the power sum of the compressor and the fan is at the minimum value according to the refrigeration operation parameters, wherein the method comprises the following steps:
constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
calculating the power sum of the compressor and the fan according to the first functional relation and the second functional relation;
taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed;
the calculating, according to the refrigeration operation parameter, a second compressor rotation speed and a second fan rotation speed corresponding to the noise at the minimum value includes: constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan; and calculating the corresponding compressor rotating speed to be the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and calculating the corresponding fan rotating speed to be the second fan rotating speed when the noise is at the minimum value.
2. The refrigerator of claim 1, wherein the response condition of the parameter collection instruction includes at least one of:
detecting that the refrigerator enters a refrigeration steady-state operation state;
and detecting that the refrigerator is in a refrigeration unsteady state operation state, and the temperature of the return air inlet is less than or equal to the target temperature of the compartment.
3. The refrigerator of claim 2, wherein when the refrigerator is in a cooling steady state operation state, the preset condition is: the temperature of the return air inlet is greater than the target temperature of the compartment; when the refrigerator is in a refrigeration unsteady state operation state, the preset conditions are as follows: the real-time temperature of the compartment is less than the target compartment temperature.
4. The refrigerator of claim 2, wherein the controller is further configured to:
when the refrigerator is in a refrigeration steady-state operation state and does not meet preset conditions, controlling the compressor to operate according to a preset standard compressor rotating speed and controlling the fan to operate according to a preset standard fan rotating speed; and when the real-time temperature of the compartment reaches the target temperature of the compartment, controlling the compressor and the fan to stop working.
5. The refrigerator of claim 1, wherein the first parameters further comprise evaporator temperature, system pressure, and compartment target temperature; the second parameter further comprises air outlet pressure, air return temperature and chamber target temperature.
6. A mute control method for a refrigerator, comprising:
responding to the parameter collection instruction, and collecting refrigeration operation parameters of the refrigerator;
calculating the power of the compressor and the fan and the corresponding first compressor rotating speed and first fan rotating speed when the power is at the minimum value according to the refrigeration operation parameters, and calculating the corresponding second compressor rotating speed and second fan rotating speed when the noise is at the minimum value according to the refrigeration operation parameters;
taking the minimum value of the first compressor rotating speed and the second compressor rotating speed as a target compressor rotating speed, and taking the minimum value of the first fan rotating speed and the second fan rotating speed as a target fan rotating speed;
when a preset condition is met, controlling the compressor to run according to the target compressor rotating speed and controlling the fan to run according to the target fan rotating speed;
the refrigeration operation parameters comprise a first parameter related to compressor power and a second parameter related to fan power; the first parameter comprises the real-time compressor rotating speed, and the second parameter comprises the real-time fan rotating speed; and calculating the corresponding first compressor rotating speed and first fan rotating speed when the power sum of the compressor and the fan is at the minimum value according to the refrigeration operation parameters, wherein the method comprises the following steps:
constructing a first functional relation between the power of the compressor and the first parameter and a second functional relation between the power of the fan and the second parameter;
calculating the power sum of the compressor and the fan according to the first functional relation and the second functional relation;
taking the corresponding compressor rotating speed when the power sum is at the minimum value as a first compressor rotating speed, and taking the fan rotating speed when the power sum is at the minimum value as a first fan rotating speed;
the calculating, according to the refrigeration operation parameter, a second compressor rotation speed and a second fan rotation speed corresponding to the noise at the minimum value includes: constructing a third functional relation between noise and the rotation speed of the real-time compressor and the rotation speed of the real-time fan; and calculating the corresponding compressor rotating speed to be the second compressor rotating speed when the noise is at the minimum value according to the third functional relation, and calculating the corresponding fan rotating speed to be the second fan rotating speed when the noise is at the minimum value.
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