CN107101451B - refrigerator and refrigeration control method and device thereof - Google Patents

refrigerator and refrigeration control method and device thereof Download PDF

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Publication number
CN107101451B
CN107101451B CN201710283922.1A CN201710283922A CN107101451B CN 107101451 B CN107101451 B CN 107101451B CN 201710283922 A CN201710283922 A CN 201710283922A CN 107101451 B CN107101451 B CN 107101451B
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Prior art keywords
preset
rate
compressor
cooling rate
rotating speed
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CN107101451A (en
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程祥
李平
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TCL Home Appliances Hefei Co Ltd
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TCL Home Appliances Hefei 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/02—Timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

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  • Engineering & Computer Science (AREA)
  • 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 relates to a refrigerator and a refrigeration control method and device thereof, wherein the method comprises the following steps: acquiring an ambient temperature; determining a preset rate corresponding to the ambient temperature according to the ambient temperature; acquiring the room temperature of at least two refrigerating spaces at intervals of preset time; obtaining a cooling rate according to at least two compartment temperatures; and judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor. The refrigeration system comprises a compressor, a refrigeration system, a compressor, a heat load, a heat exchanger, a temperature acquisition unit and a control unit.

Description

Refrigerator and refrigeration control method and device thereof
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerator and a refrigeration control method and device thereof.
background
at present, along with the continuous progress of science and technology, the proportion that household appliances such as frequency conversion refrigerator and frequency conversion air conditioner occupy in the market is higher and higher, and thereby frequency conversion refrigerator can adjust the size of compressor rotational speed to control the cold volume that the gas transmission volume of compressor further controlled whole refrigerating system provided according to ambient temperature's height and compartment control temperature's height for satisfy the demand of the different cold volume sections of refrigerator. Generally, when the ambient temperature is high and the room temperature is low, the heat load of the refrigerator body is high, and the required cooling capacity is also high.
in order to better meet the refrigeration requirement of the refrigerator, generally, in the process of program design, the rotating speed of the variable frequency compressor is divided into a plurality of gears from low to high according to the ambient temperature, so as to provide different cooling capacities to meet the requirement of the whole refrigerator.
Disclosure of Invention
Therefore, the refrigerator and the refrigeration control method and device thereof are needed to overcome the defects that in a traditional refrigeration system, the change of the heat load of a box body cannot be considered at the gear of a compressor, the compressor is difficult to be matched with the heat load of the current box body, the rotating speed of the variable frequency compressor is too high or too low, the refrigeration efficiency is low, and the energy consumption is high.
A refrigeration control method comprising:
acquiring an ambient temperature;
Determining a preset rate corresponding to the ambient temperature according to the ambient temperature;
Acquiring the room temperature of at least two refrigerating spaces at intervals of preset time;
obtaining a cooling rate according to at least two compartment temperatures;
And judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor.
In one embodiment, the step of determining whether the cooling rate is matched with the preset rate, and if not, adjusting the rotation speed of the compressor includes:
and judging whether the difference value between the cooling rate and the preset rate is smaller than a preset threshold value, and if not, adjusting the rotating speed of the compressor.
In one embodiment, the step of adjusting the rotation speed of the compressor comprises:
When the cooling rate is greater than the preset rate, the rotating speed of the compressor is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the compressor is increased.
In one embodiment, the step of adjusting the rotation speed of the compressor comprises:
And calculating to obtain the adjusting rotating speed of the compressor according to the preset speed and the cooling rate, and adjusting the work of the compressor according to the adjusting rotating speed.
In one embodiment, after the step of obtaining the ambient temperature, the method further comprises:
Acquiring a preset rotating speed of the compressor according to the environment temperature;
And controlling the compressor to work according to the preset rotating speed.
In one embodiment, the higher the ambient temperature is, the greater the preset rotation speed is.
In one embodiment, the higher the ambient temperature, the smaller the preset rate.
in one embodiment, the step of determining whether the cooling rate is matched with the preset rate, and if not, adjusting the rotation speed of the compressor includes:
And judging whether the cooling rate is matched with the preset rate, if not, adjusting the rotating speed of a compressor, and adjusting the rotating speed of a refrigerating fan.
In one embodiment, the step of adjusting the rotation speed of the refrigeration fan includes:
When the cooling rate is greater than the preset rate, the rotating speed of the refrigeration fan is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the refrigeration fan is increased.
In one embodiment, the step of obtaining the compartment temperature of at least two refrigerated spaces at preset time intervals comprises:
The room temperature is acquired once before the ambient temperature is acquired, and the room temperature is acquired once after the ambient temperature is acquired and a preset time.
A refrigeration control apparatus comprising:
the first temperature acquisition module is used for acquiring the ambient temperature;
The preset rate determining module is used for determining a preset rate corresponding to the environment temperature according to the environment temperature;
The second temperature acquisition module is used for acquiring the room temperature of at least two refrigerating spaces at intervals of preset time;
The cooling rate obtaining module is used for obtaining a cooling rate according to the temperatures of at least two chambers;
And the judging module is used for judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor.
In one embodiment, the determining module is further configured to determine whether a difference between the cooling rate and the preset rate is smaller than a preset threshold, and if not, adjust the rotation speed of the compressor.
In one embodiment, the determining module includes a first adjusting submodule, where the first adjusting submodule is configured to decrease the rotation speed of the compressor when the cooling rate is greater than the preset rate, and increase the rotation speed of the compressor when the cooling rate is less than the preset rate.
In one embodiment, the determining module is further configured to determine whether the cooling rate matches the preset rate, and if not, adjust a rotation speed of the compressor and adjust a rotation speed of the refrigeration fan.
in one embodiment, the determining module further includes a second adjusting submodule, where the second adjusting submodule is configured to decrease the rotation speed of the cooling fan when the cooling rate is greater than the preset rate, and increase the rotation speed of the cooling fan when the cooling rate is less than the preset rate.
a refrigerator comprises the refrigeration control device in any one of the above embodiments.
According to the refrigerator and the refrigeration control method and device thereof, the temperature of the refrigeration space is collected at regular time, the cooling rate in the refrigeration space is calculated in sequence, and then the rotating speed of the compressor is adjusted, so that the working power of the refrigeration system can be matched with the heat load of the current compartment, the refrigeration efficiency is effectively improved, and the energy consumption is reduced.
drawings
FIG. 1 is a schematic flow chart of a refrigeration control method according to an embodiment;
FIG. 2 is a schematic flow diagram of a refrigeration control method according to another embodiment;
FIG. 3 is a schematic flow diagram of a refrigeration control method according to another embodiment;
FIG. 4 is a block diagram of an embodiment of a refrigeration control device;
FIG. 5 is a block diagram of a determining module according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
For example, a refrigeration control method includes: acquiring an ambient temperature; determining a preset rate corresponding to the ambient temperature according to the ambient temperature; acquiring the room temperature of at least two refrigerating spaces at intervals of preset time; obtaining a cooling rate according to at least two compartment temperatures; and judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor.
In the above embodiment, the temperature of the refrigerating space is collected at regular time, the cooling rate in the refrigerating space is calculated in sequence, and the rotating speed of the compressor is adjusted, so that the working power of the compressor can be matched with the heat load of the current compartment, the refrigerating efficiency is effectively improved, and the energy consumption is reduced. For example, when the cooling rate is low, the rotating speed of the compressor is increased, so that the refrigerating space can be rapidly cooled under the condition of high heat load, the refrigerating efficiency is improved, and when the cooling rate is high, the rotating speed of the compressor is reduced, so that the refrigerating space runs at a relatively low rotating speed when the heat load is low, energy is saved, the refrigerating efficiency is improved through the process, and the energy consumption is effectively reduced.
It should be understood that the refrigeration control method of the present invention is not only applicable to refrigerators, but also applicable to devices or equipment such as air conditioners that use compressors to perform refrigeration, wherein the refrigeration space is a space refrigerated by a refrigeration system of the refrigerator or the air conditioner, and may be a refrigerating chamber or a freezing chamber of the refrigerator, an air-conditioned room, or other closed or semi-closed spaces that can be refrigerated. In the following embodiments, the refrigeration control method is applied to the refrigerator, and the refrigeration control method is further described.
As shown in fig. 1, in one embodiment, there is provided a refrigeration control method including:
Step 102, obtaining an ambient temperature.
In this embodiment, the ambient temperature is the temperature outside the refrigerated space. The refrigerated space is isolated from the outside, for example, the ambient temperature is the outside ambient temperature of the refrigerator. For example, the ambient temperature is collected by a temperature sensor.
And 104, determining a preset rate corresponding to the ambient temperature according to the ambient temperature.
Specifically, the preset rate is a preset cooling rate, that is, a preset speed of temperature change, or, that is, a preset speed of temperature decrease. The cooling rate is a preset cooling rate of the refrigerated space. The preset rate is determined according to the ambient temperature, for example, a preset rate corresponding to the ambient temperature is determined according to a preset corresponding relationship between a plurality of preset rates and a plurality of ambient temperatures. I.e. the preset rate is related to the ambient temperature of the outside.
it should be understood that, under the same refrigeration power, when the ambient temperature is higher, the temperature drop rate is lower, and when the ambient temperature is lower, the temperature drop rate is higher, specifically, since the ambient temperature will affect the refrigeration effect of the refrigeration system, under a certain refrigeration power, in a certain time, when the ambient temperature is higher, the temperature drop amplitude in the refrigeration space is smaller, and when the ambient temperature is lower, the temperature drop amplitude in the refrigeration space is larger, therefore, in this embodiment, the preset rate corresponds to the ambient temperature, the preset rate is calculated according to the ambient temperature and the refrigeration condition of the refrigerator, the preset rate is an ideal temperature drop rate matching the ambient temperature, and at the preset rate, the energy consumption can be lower and the refrigeration efficiency can be higher.
For example, when the ambient temperature is high, and the temperature drop rate is high, large power needs to be consumed, and the temperature drop rate is low, so that the refrigeration efficiency is low, and the food cannot be kept fresh.
and 106, acquiring the room temperature of at least two refrigerating spaces at intervals of preset time.
Specifically, the refrigerating space may be a refrigerating chamber of a refrigerator or a freezing chamber of the refrigerator, and the refrigerating space is a space refrigerated by the refrigerating system. The compartment therefore has a different temperature than the outside, the temperature of the compartment being the compartment temperature and the temperature of the outside being the ambient temperature. The room temperature obtained in this step is the room temperature of the same refrigeration space, and at least two room temperatures are obtained through multiple times of obtaining.
The room temperature in the room is collected, for example, by a temperature sensor provided in the room, and, as another example, by a temperature sensor provided in the room, the room temperature in the room is collected at intervals of a preset time, which is a time interval for collecting the temperature. In this step, at least two compartment temperatures are obtained at intervals of a preset time, that is, for the same compartment, after one compartment temperature is obtained, another compartment temperature is obtained at intervals of a preset time, that is, two compartment temperatures are obtained. In other embodiments, more than two room temperatures may be obtained, for example, the room temperature is obtained once every preset time, so that at least two room temperatures are obtained, that is, the time interval between obtaining the room temperature is the preset time, or the time interval between obtaining the room temperatures adjacent to two obtaining times is the preset time.
in one embodiment, step 106 includes: the room temperature is acquired once before the ambient temperature is acquired, and the room temperature is acquired once after the ambient temperature is acquired and a preset time.
That is, the two room temperatures obtained before and after can be obtained before and after the ambient temperature is obtained, so that the two room temperatures can correspond to the ambient temperature, and the obtained cooling rate can be more matched with the ambient temperature.
And 108, calculating and obtaining a cooling rate according to at least two chamber temperatures.
It should be understood that at least two compartment temperatures are compartment temperatures acquired in sequence, for example, the cooling rate is calculated according to the two compartment temperatures, in this embodiment, the two compartment temperatures are two compartment temperatures acquired at intervals of a preset time, that is, after the first compartment temperature is acquired, the second compartment temperature is acquired after the preset time, and then the two compartment temperatures are acquired, and the cooling rate is calculated according to the two compartment temperatures.
for example, the cooling rate is calculated according to the temperatures of the two chambers and the preset time. Specifically, the temperature decrease rate is the decrease amount of the temperature per unit time, and therefore, the calculation process is to calculate the difference between the temperatures of the two chambers to obtain the temperature difference, and then divide the temperature difference by the preset time to obtain the decrease amount of the temperature within the preset time, that is, the temperature decrease rate.
Step 110, determining whether the cooling rate is matched with the preset rate, if yes, executing step 112, otherwise, executing step 114.
In this embodiment, the cooling rate is compared with a preset rate, and whether the cooling rate and the preset rate are matched is determined, if yes, step 112 is executed, otherwise, step 114 is executed.
it should be understood that, whether the cooling rate is matched with the preset rate or not is judged, and whether the cooling rate is matched with the preset rate or not is used for representing whether the cooling rate and the preset rate correspond or not, whether the values of the cooling rate and the preset rate are equal or not is compared, whether the difference value of the cooling rate and the preset rate is smaller than a preset threshold or not is judged, and whether the cooling rate falls within the range of the preset rate or not is judged. That is, the preset rate may be a specific value or a range of values, and when the preset rate is a specific value, it is determined whether the cooling rate is equal to the preset rate, or whether a difference between the cooling rate and the preset rate is smaller than a preset threshold, and when the preset rate is a range of values, it is determined whether the cooling rate is within the range of the preset rate.
It should be understood that whether the actual cooling rate obtained by calculation matches the preset rate will indicate whether the current cooling power matches the heat load in the compartment and the ambient temperature, and accordingly, the operation of the refrigeration system is adjusted, so that the refrigeration efficiency can be effectively improved, and the energy consumption can be reduced.
And step 112, maintaining the current rotating speed of the compressor.
Specifically, when the cooling rate is matched with the preset rate, it is indicated that the cooling rate at this time is matched with the current ambient temperature, and the cooling rate is well adapted to the refrigeration condition of the refrigerator, the refrigeration efficiency of the compartment is higher, and the consumed power is lower, so that the current rotating speed of the compressor is maintained.
Step 114, adjusting the rotational speed of the compressor.
in this step, because the cooling rate is not matched with the preset rate, it indicates that the cooling rate is not matched with the current ambient temperature, and the cooling rate cannot be well adapted to the refrigeration working condition of the refrigerator, which results in low refrigeration efficiency or consumes excessive electric energy, therefore, in order to improve the refrigeration efficiency and reduce the energy consumption, the rotating speed of the compressor is adjusted in this step, and then the power of the compressor can be matched with the ambient temperature, and then better refrigeration efficiency and lower energy consumption are achieved.
In the above embodiment, the temperature of the refrigerating space is collected at regular time, the cooling rate in the refrigerating space is calculated in sequence, and the rotating speed of the compressor is adjusted, so that the working power of the compressor can be matched with the heat load of the current compartment, the refrigerating efficiency is effectively improved, and the energy consumption is reduced.
It should be understood that, the sequence of steps 102 to 104 and 106 is not clear, in this embodiment, for convenience of understanding, step 106 is executed after steps 102 to 104 are executed, while in other embodiments, step 106 may be executed before steps 102 to 104, and the order of the two does not affect the final determination result.
the steps 102 to 114 may be continuously repeated, that is, after the rotational speed of the compressor is adjusted, the cooling rate of the compartment is determined again, whether the cooling rate is matched with the current ambient temperature or not is determined, and whether the cooling rate is matched with the current preset rate or not is determined, so as to adjust the rotational speed of the compressor again.
In order to avoid frequent adjustment of the rotation speed of the compressor, which effectively improves the control efficiency, in one embodiment, step 110 includes: and judging whether the difference value between the cooling rate and the preset rate is smaller than a preset threshold value, if so, executing the step 112, otherwise, executing the step 114.
For example, whether the difference value between the cooling rate and the preset rate is smaller than a preset threshold value is judged, and if not, the rotating speed of the compressor is adjusted.
in this embodiment, the difference between the cooling rate and the preset rate is an absolute value, for example, it is determined whether the absolute value of the difference between the cooling rate and the preset rate is smaller than a preset threshold, the difference is used to indicate a difference between values of the cooling rate and the preset rate, and the difference is not a positive value or a negative value, and is used to reflect a matching degree of the cooling rate and the preset rate, so that frequent adjustment of the rotation speed of the compressor can be effectively avoided. Specifically, if the preset rate is a specific value, even if the rotation speed of the compressor is adjusted due to an error, the cooling rate is adjusted, and it is difficult to make the cooling rate equal to the preset rate exactly, therefore, in this embodiment, by determining whether the difference between the preset rate and the preset rate is smaller than a preset threshold, frequent adjustment of the compressor is avoided, and when the difference between the preset rate and the cooling rate is smaller than the preset threshold, it indicates that the difference between the preset rate and the cooling rate is smaller, or the cooling rate is within the range of the preset rate, therefore, the compressor does not need to be adjusted again, frequent adjustment of the rotation speed of the compressor is avoided, and the control efficiency is effectively improved.
In other embodiments, the predetermined rate is a range of values, for example, it is determined whether the cooling rate is within the range of the predetermined rate, if yes, step 112 is performed, otherwise step 114 is performed. Therefore, the rotating speed of the compressor can be prevented from being frequently adjusted, and the control efficiency is effectively improved.
In order to reasonably control the rotation speed of the compressor so that the rotation speed of the compressor can be adapted to the current ambient temperature, thereby having higher refrigeration efficiency and effectively reducing energy consumption, in one embodiment, step 114 includes: when the cooling rate is greater than the preset rate, the rotating speed of the compressor is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the compressor is increased.
Specifically, when the cooling rate is greater than the preset rate, it indicates that the cooling rate is higher at this moment, that is, the rotating speed of the compressor is higher at this moment, so that the compartment temperature is rapidly reduced, although the compartment temperature is reduced too fast, food can be kept fresh, but the power consumption is too large, and energy conservation is not facilitated.
Therefore, in this embodiment, when the cooling rate with the difference of predetermineeing the speed is greater than the predetermined threshold value, further judge whether cooling rate is greater than predetermined speed, work as cooling rate is greater than when predetermineeing speed, reduce the rotational speed of compressor, work as cooling rate is less than when predetermineeing speed, improve the rotational speed of compressor improves the rotational speed of compressor when cooling rate is less for the refrigeration space can obtain rapid cooling under the great condition of heat load, improves refrigeration efficiency, and avoids the compressor to do useless work, avoids the energy consumption extravagant, and when cooling rate is great, reduces compressor rotational speed, makes the refrigeration space when heat load is less, with the operation of relatively lower rotational speed, saves energy, improves refrigeration efficiency through above-mentioned process to effectively reduce the energy consumption.
In order to accurately calculate the rotation speed of the compressor and further make the adjusted rotation speed more matched with the preset speed, in one embodiment, step 114 includes: and calculating to obtain the adjusting rotating speed of the compressor according to the preset speed and the cooling rate, and adjusting the work of the compressor according to the adjusting rotating speed.
in this embodiment, the adjustment rotation speed is a rotation speed adjusted by the compressor, where the adjustment rotation speed and the cooling rate have an inverse correlation function relationship, or the adjustment rotation speed is inversely proportional to the cooling rate, that is, the larger the cooling rate is, the smaller the adjustment rotation speed is, the smaller the cooling rate is, the larger the adjustment rotation speed is, that is, the larger the cooling rate is and the larger the cooling rate is than the preset rate, the rotation speed of the compressor is reduced, so that the adjustment rotation speed after adjustment is reduced, and conversely, the larger the adjustment rotation speed is, and further the adjustment rotation speed is more matched with the preset rate.
for better energy saving and improved cooling efficiency, in one embodiment, as shown in fig. 2, after step 102, the method further includes:
And 103a, acquiring a preset rotating speed of the compressor according to the environment temperature.
And 103b, controlling the compressor to work according to the preset rotating speed.
In this embodiment, obtain the preset rotational speed of compressor according to ambient temperature to make the compressor work according to preset rotational speed, specifically, when the compressor begins to work, obtain preset rotational speed according to ambient temperature, the compressor works with preset rotational speed, and this preset rotational speed can be regarded as the initial rotational speed when the compressor begins to work promptly. Because the rotating speed of the work of the compressor is matched with the current ambient temperature, the refrigeration efficiency of the compressor can be matched with the current ambient temperature, the refrigeration efficiency is higher, and the energy consumption waste can be effectively avoided.
For example, step 102 includes acquiring an ambient temperature when the compressor is started, in this embodiment, after the compressor is started, acquiring the ambient temperature, and then acquiring a preset rotation speed according to the ambient temperature, where the compressor operates according to the preset rotation speed.
For better energy saving and improved cooling efficiency, in one embodiment, the higher the ambient temperature, the higher the preset rotational speed. For example, the lower the ambient temperature, the smaller the preset rotation speed. For example, the greater the value of the ambient temperature, the greater the value of the preset rotation speed.
In this embodiment, the preset rotation speed of the compressor has a positive correlation function relationship with the ambient temperature, specifically, when the ambient temperature is higher, the temperature is decreased by a certain range in unit time, and larger energy is needed, and when the ambient temperature is lower, the temperature is decreased by a certain range in unit time, and smaller energy is needed.
To improve the cooling efficiency and reduce the energy consumption, in one embodiment, the preset rate is smaller the higher the ambient temperature is, for example, the preset rate is larger the lower the ambient temperature is. For example, the greater the value of the ambient temperature, the smaller the value of the preset rate.
specifically, under the condition that the ambient temperature is low, the temperature naturally drops at a high rate, so that the preset rate is high for matching with the current ambient temperature, energy consumption is saved, and the refrigeration efficiency is improved.
To increase the flexibility of the refrigeration system and further increase the refrigeration efficiency, in one embodiment, step 114 further comprises: and adjusting the rotating speed of the compressor and the rotating speed of the refrigerating fan.
It should be understood that the compressor is used for compressing the refrigerant, the refrigerant with high temperature and high pressure is sent from the compressor to the condenser for cooling, and the cooled refrigerant with low temperature and high pressure is evaporated by absorbing heat in the evaporator, so that the temperature of the air contacting with the evaporator is lowered and cooled. The refrigerating fan is used for sending cooled air into the compartment, specifically, the cooled air is conveyed in the pipeline, the refrigerating fan blows the cooled air into the compartment, so that the compartment is cooled, and the air in the compartment is conveyed to the evaporator again through the pipeline for cooling.
Specifically, the rotational speed of refrigeration fan plays cooling air's transport efficiency, when the rotational speed of refrigeration fan is great, then cooling air gets into between indoorly fast, and the air of room is then fast backward flow to the evaporimeter and cool off, then the cooling rate of room is great, and when the rotational speed of refrigeration fan is less, then the cooling rate of room is less.
therefore, when the cooling rate is not matched with the preset rate, the cooling rate is adjusted except the rotating speed of the compressor, and the cooling rate can be adjusted by adjusting the rotating speed of the refrigerating fan, so that the flexibility of the refrigerating system is improved, and the refrigerating efficiency is further improved.
In order to reasonably control the rotation speed of the compressor so that the rotation speed of the compressor can be adapted to the current ambient temperature, thereby having higher refrigeration efficiency and effectively reducing energy consumption, in one embodiment, step 114 includes: when the cooling rate is greater than the preset rate, the rotating speed of the refrigeration fan is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the refrigeration fan is increased.
specifically, when the cooling rate is low, the rotating speed of the refrigerating fan is increased, so that cooling air quickly enters the compartment, the temperature of the compartment is quickly reduced, the cooling rate is increased, the refrigerating efficiency is improved, and energy consumption waste is avoided; when the cooling rate is large, the rotating speed of the refrigerating fan is reduced, the flow rate of cooling air is reduced, the cooling rate is reduced, the refrigerating fan runs at a relatively low rotating speed, energy is saved, the refrigerating efficiency is improved through the process, and the energy consumption is effectively reduced.
the following is a specific embodiment of a refrigeration control method:
in this embodiment, as shown in table 1, the ambient temperature is divided into 4 intervals, and the preset speed, the preset rotating speed, and the preset rotating speed of the refrigeration fan corresponding to 4 gears are provided, where the preset rotating speed is an initial rotating speed of the compressor, and the preset speed is a preset cooling rate of the refrigeration compartment.
TABLE 1
For example, when the environment temperature sensor judges that the environment temperature is above 38 ℃, the initial starting rotating speed of the compressor is R 1, the preset speed of the refrigerating chamber is v 1 and the rotating speed of the refrigerating fan is N 1, when the environment temperature sensor judges that the environment temperature is between 25 ℃ and 38 ℃, the initial starting rotating speed of the compressor is R 2, the preset speed of the refrigerating chamber is v 2 and the rotating speed of the refrigerating fan is N 2, and the like, wherein the size relation of all parameters is R 1 > R 2 > R 3 > R 4, v 1 < v 2 < v 3 < v 4, N 1 > N 2 > N 3 > N 4, and the specific values of all the parameters are set according to the box structure of the refrigerator and the ideal refrigerating working condition of all the environment temperatures.
When the compressor starts to refrigerate, the cooling rate of the refrigerating chamber is judged, and then the rotating speed of the compressor and the rotating speed of the refrigerating fan are adjusted, so that the output of the cooling capacity of the refrigerating system is changed, and finally the cooling rate v is close to the preset rate vi.
As shown in fig. 3, the refrigeration control method in the present embodiment includes the following steps:
In step 302, the compressor is started.
And step 304, collecting the compartment temperature according to the set period and times by the compartment temperature sensor.
And step 306, calculating and judging whether the temperature reduction rate v exceeds the range of the preset rate vi.
And step 308, maintaining the rotation speed for running.
And 310, if the cooling rate v is smaller than the minimum value of the preset range of the preset rate vi, increasing the rotating speed of the compressor, and if the cooling rate v is larger than the maximum value of the preset rate vi, reducing the rotating speed of the compressor, wherein the rotating speed of the refrigerating fan changes along with the rotating speed of the compressor.
For example, the compartment temperature sensor is set to have a sampling period T i of 3min and a sampling frequency n of 30, when the compressor is started, the compartment temperature is started to be sampled T i (i is 1,2,3 … … 30), and the temperature reduction rate v of the compartment is (T 30 -T 1)/T, that is, the difference between the last temperature value and the first temperature value is obtained, the difference is obtained, and the difference is divided by the period time length, so that the temperature reduction rate in the period, that is, the temperature reduction rate is obtained.
and comparing the cooling rate v obtained by the calculation with a preset rate v i, and if the cooling rate v exceeds a certain range of the preset rate v i, namely the difference value between the cooling rate v and the preset rate v i is greater than or equal to a preset threshold value, adjusting the rotating speed of the compressor and the rotating speed of the refrigerating fan, when the cooling rate v is greater than the preset rate v i, controlling to reduce the rotating speed of the compressor and reduce the rotating speed of the refrigerating fan, and when the cooling rate v is less than the preset rate v i, controlling to increase the rotating speed of the compressor and increase the rotating speed of the refrigerating fan.
The rotating speed of the compressor is reduced or increased, namely the rotating speed of the compressor is adjusted, in order to accurately adjust the rotating speed of the compressor, a calculation formula for adjusting the rotating speed is that R i (v i/v) k, wherein R i is a preset rotating speed and can also be the current rotating speed of the compressor, when the compressor starts to work, R i is an initial rotating speed, when the compressor works for a period of time and the rotating speed of the compressor is adjusted, R i is the current rotating speed of the compressor, k is a constant which is a proportional coefficient of the rotating speed of the compressor and the current rotating speed of the output cold, the proportional coefficient is set according to the structure and the volume of a box body and the size of the gas delivery quantity selected by the compressor, as can be seen from the formula, the rotating speed R is adjusted to be in inverse proportion to the cooling rate v, when the cooling rate v is larger, the rotating speed R is adjusted to be reduced, so that the cooling quantity is reduced, and the cooling rate is reduced, when the cooling rate v is smaller, the rotating speed R is adjusted to be increased, so that the cooling rate is increased, thereby the cooling rate is gradually close to the preset cooling rate i.
The rotating speed of the refrigerating fan is reduced or increased, namely, the rotating speed of the refrigerating fan is adjusted, the fan rotating speed adjusting formula is N i R/R i alpha, wherein N i is the preset rotating speed of the refrigerating fan, alpha is a proportional coefficient of the rotating speed of the fan corresponding to the rotating speed of the compressor, the air supply quantity of the fan and the size of the volume of the box body are set according to the box body structure, and the rotating speed N of the refrigerating fan is in direct proportion to the adjusting rotating speed R of the compressor.
In one embodiment, there is provided a refrigeration control apparatus, as shown in fig. 4, including:
The first temperature obtaining module 410 is configured to obtain an ambient temperature.
For example, the first temperature acquisition module 410 includes a temperature sensor, e.g., the first temperature acquisition module 410 is a first temperature sensor.
A preset rate determining module 420, configured to determine a preset rate corresponding to the ambient temperature according to the ambient temperature.
And a second temperature obtaining module 430, configured to obtain room temperatures of at least two refrigeration spaces at preset time intervals.
For example, the second temperature acquisition module 430 includes a temperature sensor, e.g., the second temperature acquisition module 430 is a second temperature sensor.
A cooling rate obtaining module 440, configured to obtain a cooling rate according to at least two of the chamber temperatures.
And the judging module 450 is configured to judge whether the cooling rate is matched with the preset rate, and if not, adjust the rotation speed of the compressor.
in an embodiment, the determining module 450 is further configured to determine whether a difference between the cooling rate and the preset rate is smaller than a preset threshold, and if not, adjust the rotation speed of the compressor.
In one embodiment, as shown in fig. 5, the determining module 450 includes a first adjusting submodule 451, where the first adjusting submodule 451 is configured to decrease the rotation speed of the compressor when the temperature decreasing rate is greater than the preset rate, and increase the rotation speed of the compressor when the temperature decreasing rate is less than the preset rate.
In an embodiment, the determining module 450 is further configured to determine whether the cooling rate is matched with the preset rate, and if not, adjust a rotation speed of a compressor and adjust a rotation speed of a refrigeration fan.
in an embodiment, referring to fig. 5 again, the determining module 450 further includes a second adjusting submodule 452, where the second adjusting submodule 452 is configured to decrease the rotation speed of the cooling fan when the cooling rate is greater than the preset rate, and increase the rotation speed of the cooling fan when the cooling rate is less than the preset rate.
In one embodiment, a refrigerator is provided, which comprises the refrigeration control device in any one of the above embodiments.
In one embodiment, a refrigerator is provided, the refrigerator includes a refrigeration system, the refrigeration system includes a compressor and a refrigeration fan, wherein the refrigerator is provided with a compartment, the compartment is communicated with the refrigeration system through a pipeline, the refrigeration fan is arranged in the pipeline, the pipeline is connected with an evaporator of the refrigeration system, the refrigerator is provided with a compartment temperature sensor for judging the compartment temperature of the compartment, and the refrigerator is further provided with an environment temperature sensor for judging the environment temperature.
The refrigerator performs refrigeration control by using the refrigeration control method according to any one of the embodiments, that is, the refrigerator controls the refrigeration system to operate by using the refrigeration control method according to any one of the embodiments, for example, the refrigeration control device is used for controlling the refrigeration system to operate, for example, the refrigerator controls the refrigeration system to operate by using the refrigeration control device, for example, the refrigerator controls the compressor to operate by using the refrigeration control method according to any one of the embodiments, and for example, the refrigerator controls the compressor and the refrigeration fan to operate by using the refrigeration control method according to any one of the embodiments.
It should be noted that, in the above system embodiment, each included module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional modules are only for convenience of distinguishing from each other and are not used for limiting the protection scope of the present invention.
In addition, it can be understood by those skilled in the art that all or part of the steps in the method for implementing the embodiments described above may be implemented by instructing the relevant hardware through a program, and the corresponding program may be stored in a readable storage medium.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (16)

1. A refrigeration control method, characterized by comprising:
Acquiring an ambient temperature;
Determining a preset rate corresponding to the ambient temperature according to the ambient temperature;
Acquiring the room temperature of at least two refrigerating spaces at intervals of preset time;
obtaining a cooling rate according to at least two compartment temperatures;
And judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor.
2. The refrigeration control method according to claim 1, wherein the step of determining whether the cooling rate matches the preset rate, and if not, adjusting the rotation speed of the compressor comprises:
And judging whether the difference value between the cooling rate and the preset rate is smaller than a preset threshold value, and if not, adjusting the rotating speed of the compressor.
3. The refrigeration control method as recited in claim 1, wherein the step of adjusting the rotational speed of the compressor comprises:
when the cooling rate is greater than the preset rate, the rotating speed of the compressor is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the compressor is increased.
4. The refrigeration control method as recited in claim 3, wherein the step of adjusting the rotational speed of the compressor includes:
and calculating to obtain the adjusting rotating speed of the compressor according to the preset speed and the cooling rate, and adjusting the work of the compressor according to the adjusting rotating speed.
5. The refrigeration control method as recited in claim 1, further comprising, after the step of obtaining the ambient temperature:
Acquiring a preset rotating speed of the compressor according to the environment temperature;
And controlling the compressor to work according to the preset rotating speed.
6. The refrigeration control method according to claim 5, wherein the higher the ambient temperature is, the larger the preset rotation speed is.
7. The refrigeration control method as recited in claim 1, wherein the preset rate is smaller as the ambient temperature is higher.
8. The refrigeration control method according to claim 1, wherein the step of determining whether the cooling rate matches the preset rate, and if not, adjusting the rotation speed of the compressor comprises:
And judging whether the cooling rate is matched with the preset rate, if not, adjusting the rotating speed of a compressor, and adjusting the rotating speed of a refrigerating fan.
9. the refrigeration control method as recited in claim 8, wherein the step of adjusting the rotational speed of the refrigeration fan includes:
When the cooling rate is greater than the preset rate, the rotating speed of the refrigeration fan is reduced, and when the cooling rate is less than the preset rate, the rotating speed of the refrigeration fan is increased.
10. the refrigeration control method as recited in claim 1, wherein the step of obtaining the compartment temperature of at least two refrigerated spaces at intervals of a preset time comprises:
the room temperature is acquired once before the ambient temperature is acquired, and the room temperature is acquired once after the ambient temperature is acquired and a preset time.
11. A refrigeration control apparatus, comprising:
the first temperature acquisition module is used for acquiring the ambient temperature;
The preset rate determining module is used for determining a preset rate corresponding to the environment temperature according to the environment temperature;
The second temperature acquisition module is used for acquiring the room temperature of at least two refrigerating spaces at intervals of preset time;
The cooling rate obtaining module is used for obtaining a cooling rate according to the temperatures of at least two chambers;
And the judging module is used for judging whether the cooling rate is matched with the preset rate or not, and if not, adjusting the rotating speed of the compressor.
12. The refrigeration control device according to claim 11, wherein the determining module is further configured to determine whether a difference between the cooling rate and the preset rate is smaller than a preset threshold, and if not, adjust the rotation speed of the compressor.
13. the refrigeration control device of claim 11, wherein the determining module comprises a first adjusting submodule configured to decrease the rotational speed of the compressor when the cooling rate is greater than the preset rate, and increase the rotational speed of the compressor when the cooling rate is less than the preset rate.
14. The refrigeration control device according to claim 11, wherein the determining module is further configured to determine whether the cooling rate matches the preset rate, and if not, adjust a rotational speed of a compressor and adjust a rotational speed of a refrigeration fan.
15. The refrigeration control device according to claim 14, wherein the determining module further includes a second adjusting submodule configured to decrease the rotational speed of the refrigeration fan when the cooling rate is greater than the preset rate, and increase the rotational speed of the refrigeration fan when the cooling rate is less than the preset rate.
16. A refrigerator comprising the refrigeration control apparatus of any one of claim 11 to claim 15.
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