CN118858749B - Refrigerator and power consumption detection method thereof - Google Patents
Refrigerator and power consumption detection method thereof Download PDFInfo
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- CN118858749B CN118858749B CN202411329598.9A CN202411329598A CN118858749B CN 118858749 B CN118858749 B CN 118858749B CN 202411329598 A CN202411329598 A CN 202411329598A CN 118858749 B CN118858749 B CN 118858749B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- 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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Abstract
本发明公开了一种冰箱及其耗电量的检测方法，包括：在设定环境温度下，选定一个低转速和一个高转速；压缩机以低转速运行，一段维持时间后切换到高转速运行；采集冰箱稳态功耗和化霜功耗，计算出设定环境温度下的日耗电量。选取一组等差数列作为压缩机的转速，使冰箱在节能状态下运行，记录对应转速下的稳态功率和压缩机单个开机周期内冷藏电动风门开启/冷藏电动风门关闭的次数，选取最低功率、较高次数所对应的压缩机转速作为低转速；选取最低次数、较低功率对应的压缩机转速作为高转速。本发明科学地选取压缩机的运行转速，将耗电量维持在要求的限值范围内。
The present invention discloses a refrigerator and a method for detecting its power consumption, comprising: selecting a low speed and a high speed at a set ambient temperature; the compressor runs at a low speed, and switches to a high speed after a period of maintenance; collecting the steady-state power consumption and defrosting power consumption of the refrigerator, and calculating the daily power consumption at the set ambient temperature. A set of arithmetic progressions is selected as the speed of the compressor, so that the refrigerator runs in an energy-saving state, and the steady-state power at the corresponding speed and the number of times the refrigeration electric damper is opened/closed in a single startup cycle of the compressor are recorded, and the compressor speed corresponding to the lowest power and the higher number is selected as the low speed; the compressor speed corresponding to the lowest number and the lower power is selected as the high speed. The present invention scientifically selects the operating speed of the compressor to maintain the power consumption within the required limit range.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerator and a power consumption detection method thereof.
Background
The power consumption of the refrigerator is an important index selected by a user. When the thermal load of the refrigerator is smaller, the compressor generally operates at low frequency, the refrigerating capacity is small, the evaporation temperature is increased, the condensation temperature is reduced, the refrigerating efficiency of the compressor is improved, and the energy-saving effect is obvious. When the refrigerator has a large heat load, the compressor is operated at a high frequency, so that the refrigerating capacity of the compressor is improved, the requirements of a high-temperature environment or a high heat load are met, and the energy consumption of the refrigerator is relatively high. Therefore, the selection of the rotation speed of the compressor is very important in the refrigerator design stage.
On the other hand, the externally declared integrated power consumption of the refrigerator is mostly the power detected when the refrigerator enters the energy saving state. The energy-saving state of the refrigerator means that the refrigerator is not opened for a long time, the load in the refrigerator is low, the required cold energy is small, the rotating speed of the compressor can be reduced, and the stability of the temperature in the refrigerator is maintained with the lowest energy consumption.
During testing, the simulated refrigerator is not opened for a long time, and at the moment, the compressor only needs to provide cold energy required by heat exchange between the interior of the refrigerator and the environment, and high-rotation-speed operation is not required to be maintained. When the refrigerator is actually detected, the refrigerator operates for a set time, and the refrigerator is considered to enter an energy-saving state without door opening action, and at the moment, the power consumption of the refrigerator starts to be tested. The compressor is operated at a lower rotational speed in this state, which is the initial rotational speed and remains in operation, and if the compressor is not stopped for a prescribed period of time, this rotational speed is indicative of insufficient cooling capacity. At this time, the compressor needs to be up-converted and run at a higher rotational speed. If the initial rotation speed is selected to be too low, the power increase is caused by the compressor frequency-increasing action, otherwise, if the initial rotation speed is selected to be too high, the power consumption may not meet the requirement limit value (the actual measurement value of the power consumption is not higher than the power consumption claiming value 115% on the nameplate in national standards).
From the above, if the low rotation speed is not suitable, the compressor may not stop for a long time, and the compressor is required to accelerate at this time, while the high rotation speed can make the refrigerating chamber and the freezing chamber meet the refrigeration requirement as soon as possible, the operation power of the compressor is high, the daily power consumption increases sharply, so the operation rotation speed of the compressor in the energy-saving state needs to be selected reasonably. In conventional designs, the low rotational speed of the compressor is often selected empirically, wherein the low rotational speed is selected based on the open probability and the power consumption test results, and the test period is long and the results do not necessarily match the actual operation conditions.
Therefore, how to reasonably set the rotation speed of the variable frequency compressor in the energy-saving state for the refrigerator, and avoid the technical problem that the compressor is not stopped in the specified test time or the power consumption of the whole refrigerator exceeds the power consumption limit value range in the power consumption test process is urgent to be solved in the industry.
Disclosure of Invention
The invention provides a refrigerator and a method for detecting power consumption of the refrigerator, which are used for solving the technical problem that the rotation speed of a compressor is difficult to select when the power consumption of the refrigerator is tested in the prior art, so as to ensure that the power consumption of the refrigerator is kept in a lower range under the energy-saving state.
The technical scheme adopted by the invention is that the method for detecting the power consumption of the refrigerator comprises the following steps:
selecting a low rotating speed and a high rotating speed under the set environment temperature;
The compressor is switched to high-speed operation after running at low speed for a period of maintenance time t;
and collecting the steady-state power consumption and defrosting power consumption of the refrigerator, and calculating the daily power consumption at the set environment temperature.
Further, a group of arithmetic series is selected as the rotating speed of the compressor, so that the refrigerator can operate in an energy-saving state, the steady-state power at the corresponding rotating speed and the times of opening/closing the refrigerating electric air door in a single starting period of the compressor are recorded, the rotating speed of the compressor corresponding to the lowest power and the higher times is selected as the low rotating speed, and the rotating speed of the compressor corresponding to the lowest times and the lower power is selected as the high rotating speed.
Preferably, the number of times the higher refrigeration motorized damper is opened/the refrigeration motorized damper is closed is three.
Preferably, the lowest refrigeration electric damper is opened/closed a number of times.
Preferably, the low rotational speed is 1500r and the high rotational speed is 1800r.
Further, the maintaining time t of the low rotation speed operation is determined according to the number of times that the refrigerating electric air door is opened/closed, and when the number of times that the refrigerating electric air door is opened/closed does not exceed the set number of times, the maintaining time is the sum of the single start-up period time and the allowable error value.
Further, when the number of times that the refrigerating electric air door is opened/closed exceeds the set number of times, a group of time periods are selected, the steady-state power under the corresponding time periods and the number of times that the refrigerating electric air door is opened/closed in a single starting period of the compressor are recorded, and the time period corresponding to the lowest power and the lower number of times is selected as the maintenance time of low-rotation-speed operation.
Preferably, the set number of times is three.
As another embodiment, the maintenance time t of the low rotation speed operation is determined in such a way that the compressor is operated at a low rotation speed, the electric damper to be refrigerated is closed, the rotation speed of the compressor is increased to a high rotation speed when the temperature of the freezing chamber is lower than the set temperature, or the compressor is operated at a low rotation speed, and the rotation speed of the compressor is increased to a high rotation speed when the electric damper to be refrigerated is operated for a set number of times.
The invention also provides a refrigerator, and the power consumption of the refrigerator is tested according to the detection method.
Compared with the prior art, the invention scientifically selects the initial running rotating speed of the compressor during testing, reasonably and dynamically adjusts the rotating speed of the compressor, maintains the power consumption within the required limit value range, and has obvious energy-saving effect.
Drawings
The invention will now be described in detail with reference to the accompanying drawings and examples, in which:
FIG. 1 is a graph of temperature change of a refrigerating chamber and a freezing chamber when a refrigerator is operated;
FIG. 2 is a graph of the steady state average power consumption of a refrigerator as a function of compressor speed;
fig. 3 is experimental data for compressor low and high speed selection.
FIG. 4 is a flow chart of a first embodiment of compressor speed and hold time selection;
FIG. 5 is a flow chart of another embodiment of compressor speed and maintenance time selection.
Wherein:
s1, low rotation speed and S2, high rotation speed;
t the maintenance time of low rotation speed, delta t time allowable error value,
And n, setting times of cooling.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are given by way of illustration only and are not intended to be limiting.
The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art are not discussed in detail in this specification, but are intended to be considered as part of this specification where appropriate. Any particular values in the specification are to be construed as merely illustrative and not a limitation of the present invention.
For convenience of description, terms used in the specification to describe positions such as "above", "on" right "," in front of "and the like are used only to describe spatial positional relationship of a certain component with other components of the embodiment shown in the drawings, and when the positions where the components are placed are different, the relative positions are changed, and therefore the positional relationship with respect to the embodiment of the drawings should not be limiting to the present invention.
In addition, it should be noted that the terms "first", "second", etc. are used in the description merely for distinguishing similar elements, and there is no sequence, so it should not be construed that the scope of the present invention is limited.
For a conventional refrigerator-freezer, the target temperature of the freezer is 4 ℃, the target temperature of the freezer is-18 ℃, the start point temperature of the freezer is assumed to be 5 ℃, the stop point temperature is 3 ℃, and the start point temperature of the freezer is-17 ℃, the stop point temperature is-19 ℃. When the temperature of the refrigerating chamber is higher than 5 ℃ or the temperature of the freezing chamber is higher than-17 ℃, the refrigerating chamber has a refrigerating requirement, and the compressor is required to be started to cool the refrigerating chamber.
Fig. 1 is a graph showing temperature changes of a refrigerating chamber and a freezing chamber when a refrigerator is operated.
As shown in fig. 1, in the shutdown stage of the compressor, it is assumed that the refrigerating chamber is detected to have a refrigerating requirement, the compressor is started, a refrigerating electric damper and a refrigerating fan in the refrigerator are started, and after the refrigerating chamber and the refrigerating chamber return air are converged by a main pipe and flow through an evaporator for cooling, the refrigerating chamber and the refrigerating chamber return air are respectively sent into the refrigerating chamber and the refrigerating chamber through a refrigerating air duct, the refrigerating electric damper and the refrigerating air duct. When the temperature of the refrigerating chamber is reduced to the stop point, the refrigerating electric air door is closed, and at the moment, the whole cooling capacity is used for cooling the freezing chamber. The temperature of the refrigerating chamber is low, so that the temperature of the refrigerating chamber is low, and the temperature of the refrigerating chamber is gradually increased due to heat absorption during the cooling period of the refrigerating chamber. If the cooling time of the freezing chamber is too long, the temperature of the refrigerating chamber may be increased to the starting point, at this time, the refrigerating electric air door in the refrigerator is opened, and under the action of the wind pressure of the refrigerating fan, the return air of the refrigerating chamber and the return air of the freezing chamber are converged again and flow through the evaporator for cooling, and then are respectively sent into the refrigerating chamber and the freezing chamber. And circulating in this way until the freezing chamber and the refrigerating chamber reach the set temperature at the same time, and at the moment, no refrigeration requirement exists, and the compressor is stopped.
In order to avoid that the refrigerating chamber and the freezing chamber can not simultaneously meet the refrigerating requirement, so that the compressor is not stopped, the compressor is accelerated after continuously running for a period of time, the refrigerating capacity is increased, and the refrigerating chamber and the freezing chamber simultaneously meet the refrigerating requirement as soon as possible.
As mentioned in the background art, the externally declared integrated power consumption of a refrigerator is the power detected when the refrigerator enters an energy saving state. When the refrigerator is subjected to power consumption test, the environment temperature is stable, the door is not opened for a long time, the compressor can operate at a low rotating speed, the stable operation power is reduced, the starting rate can be increased, and the daily power consumption can be reduced comprehensively.
The existing method for testing the power consumption of the refrigerator is that the ambient temperature is maintained at a certain temperature, for example, 32 ℃, the refrigerator is powered on, and if the door opening action is not detected within a preset time, for example, within 24 hours, the refrigerator is considered to enter an energy-saving state, and then the power consumption test is carried out. And in the energy-saving state, the compressor runs at a low rotating speed, the power consumption is reduced, the steady-state power consumption and the defrosting power consumption are collected, and the average daily power consumption corresponding to the ambient temperature of 32 ℃ is calculated. If the average daily power consumption is within a prescribed range, the power consumption of the refrigerator is tested to be acceptable, and if the average daily power consumption exceeds a certain range of the stated value, the power consumption of the refrigerator is not acceptable.
From the above, the unsuitable selection of low rotation speed may lead to long-term non-stop of the compressor, and the high rotation speed can lead to the refrigerating chamber and the freezing chamber meeting the refrigeration requirement as soon as possible, but at the same time, the operation power of the compressor is higher, the daily power consumption is increased rapidly, so that the operation rotation speed of the compressor in the energy-saving state needs to be selected reasonably.
Aiming at the problem of selecting the rotation speed of the compressor in the power consumption testing process, the invention provides a method for detecting the power consumption of a refrigerator.
During testing, after the refrigerator stably runs for a period of time, when the functional parameters are unchanged and the opening and closing of the door are not detected, the refrigerator enters an energy-saving state, the defrosting times and the rotating speed of the compressor in the state are reduced, and the control modes of other electric devices are basically unchanged.
The power consumption detection method provided by the invention comprises the following steps:
Selecting a low rotating speed S1 and a high rotating speed S2 at a set ambient temperature;
the compressor is switched to high-speed S2 operation after running for a maintaining time t at low-speed S1;
and collecting the steady-state power consumption and defrosting power consumption of the refrigerator, and calculating the daily power consumption at the set environment temperature.
The invention relates to a method for calculating the power consumption of a refrigerator, which belongs to the prior art, and aims at selecting the rotation speed of a compressor and selecting the maintaining time, so the calculation of the power consumption is not further described.
The invention scientifically selects the initial running rotating speed of the compressor during testing, reasonably and dynamically adjusts the rotating speed of the compressor, maintains the power consumption within the required limit value range, and has obvious energy-saving effect.
The method comprises the steps of selecting a group of arithmetic series as the rotating speed of a compressor, enabling the refrigerator to operate in an energy-saving state, recording steady-state power at the corresponding rotating speed and the times of opening/closing of a refrigerating electric air door in a single starting period of the compressor, selecting the rotating speed of the compressor corresponding to the times of opening/closing of a refrigerating electric air door with the lowest power and the higher refrigerating electric air door as a low rotating speed S1, and selecting the times of opening/closing of the refrigerating electric air door with the lowest power and the rotating speed of the compressor corresponding to the lower power as a high rotating speed S2.
The invention scientifically selects the initial running rotating speed of the compressor during testing, reasonably and dynamically adjusts the rotating speed of the compressor, maintains the power consumption within the required limit value range, and has obvious energy-saving effect.
The number of times the electric damper is opened/closed is defined as that for a refrigerator/freezer, assuming that both the refrigerator compartment and the freezer compartment require cooling, the electric damper is opened and the temperature of the refrigeration is reduced, which is the first cooling of the refrigerator compartment. The refrigerating temperature is 4 ℃, so the refrigerating temperature can be quickly reduced, at the moment, the refrigerating electric air door is closed, but the freezing chamber is required to be reduced to-18 ℃, so the compressor is required to continue to operate, the freezing chamber temperature is continuously reduced, the first cooling of the freezing chamber is realized, during the cooling period of the freezing chamber, the refrigerating chamber temperature can be increased, at the moment, the refrigerating electric air door is required to be opened for cooling the refrigerating chamber, the second cooling is realized, the refrigerating electric air door is closed, only the freezing chamber is continuously cooled, the second cooling is realized, and the like.
Further, in order to avoid long-term refrigeration without stopping caused by low-rotation-speed operation of the compressor, the maintenance time of the low-rotation-speed operation needs to be reasonably regulated, and the time for the compressor to accelerate is determined, so that the steady-state power is lower.
Further, in order to shorten the matching test period, the rotation speed of the compressor can also be independently controlled according to the refrigerating and freezing requests, and the specific control method is as follows:
When refrigeration is needed, the temperature of the refrigerating chamber is high, the required cold quantity is low, the compressor runs at a low rotating speed, the refrigerating chamber is cooled, and the air door is closed when the temperature of the refrigerating chamber meets the requirement. At this time, the compressor is operated at a high rotational speed to cool the freezing chamber.
Further, in the starting period of a single compressor, the action times of the refrigerating electric air door are counted, if the action times of the refrigerating electric air door are more, namely, when the temperature of the refrigerating chamber meets the requirement, the temperature of the refrigerating chamber is increased in the process of cooling the freezing chamber, the refrigerating chamber needs to be cooled again, so that the cooling capacity of the freezing chamber is insufficient, and the running rotating speed of the compressor in the cooling process of the freezing chamber needs to be increased, so that the time of the temperature increase of the refrigerating chamber is shortened, or the running rotating speed of the compressor in the cooling process of the refrigerating chamber is increased, the temperature increase amplitude of the freezing chamber is reduced, and the cooling time of the freezing chamber is shortened.
The rotating speed (namely the cold quantity) of the compressor is matched with the room temperature by the rotating speed control method of the compressor, so that the power consumption of the whole refrigerator is reduced.
In an embodiment, where the ambient temperature is set to 32 ℃, the refrigerator set temperature is set to 4 ℃, the freezer set temperature is set to-18 ℃, a set of arithmetic progression is selected, such as CS1, CS1+60, CS3+120, in which case CS1 is selected to 1200r, the compressor is first run at CS1 speed, and after the system is stationary, the average power P1 in steady running state is recorded; and then, the rotation speed of the compressor is changed into CS1 plus 60 rotation, after the operation is stable, the stable operation average power P2 is recorded, and the like, so that the stable operation average power under a series of rotation speeds of the compressor is obtained. And selecting the corresponding compressor running speed when the power is lower in a low rotation speed interval, and marking the compressor running speed as a low rotation speed S1, and selecting the corresponding compressor running speed when the power is lower in a high rotation speed interval, and marking the compressor running speed as a high rotation speed S2. Referring to fig. 2 and 3, it can be seen that the low rotation speed S1 corresponds to a value of 1500r and the high rotation speed S2 corresponds to a rotation speed of 1800r. As can be seen from the data in the table of fig. 3, the number of times the refrigeration motor damper is opened/closed varies significantly from 3/3 to 1/1 as the compressor speed increases gradually to 1500r and 1800r, at which both the power consumption at the low speed S1 and the high speed S2 are relatively low.
The refrigeration integral in the table of fig. 3 refers to the integral average temperature of the temperatures of the refrigerating chambers collected by a plurality of thermocouples arranged in the refrigerating chambers, for example, 3 thermocouples are arranged in the refrigerating chambers, the collected temperatures are respectively T1, T2 and T3, and the refrigeration integral average refers to the integral average temperature obtained by integrating and averaging the three temperature points. Temperature and freeze integration and so on.
It can be seen from fig. 3 that the power consumption is lowest when the rotation speed of the compressor is 1500r, the number of times n of opening the refrigerating electric air door and closing the refrigerating electric air door is 3/3 (it is generally considered that not more than 3/3 is suitable because the compressor is not stopped for a long time), and the power consumption is higher when the rotation speed of the compressor is 1800r, but the number of times n of opening the refrigerating electric air door and closing the refrigerating electric air door is 1/1, which meets the requirement of rapid cooling of the compartment, and the power consumption is not too high.
When the power consumption is tested, the compressor is started to run at a low rotation speed, the refrigerating chamber and the freezing chamber still do not meet the refrigeration requirement at the same time after a period of maintaining time, and the compressor is lifted to run at a high rotation speed at the moment so as to ensure that the temperatures of the refrigerating chamber and the freezing chamber meet the conditions as soon as possible in order to avoid long-term non-stop of the compressor. The low rotation speed has low instantaneous power, long maintenance running time and low daily power consumption, and the low rotation speed has short maintenance time, and is subsequently increased to high rotation speed, and the total running time is reduced, but the power is higher and the daily power consumption is not low. Therefore, it is important to choose a time opportunity for the low rotational speed to rise to the high rotational speed.
Fig. 4 is a flow chart of a first embodiment of compressor speed and maintenance time selection.
The method comprises the steps of firstly selecting a group of arithmetic series as the rotating speed of a compressor, enabling the refrigerator to operate in an energy-saving state, recording steady-state power at the corresponding rotating speed and the times of opening/closing of a refrigerating electric air door in a single starting period of the compressor, selecting the rotating speed of the compressor corresponding to the times of opening/closing of a refrigerating electric air door with the lowest power and the higher refrigerating electric air door as a low rotating speed S1, and selecting the times of opening/closing of the refrigerating electric air door with the lowest power and the rotating speed of the compressor corresponding to the lower power as a high rotating speed S2.
Then, the maintenance time t of the low rotation operation is determined according to the number of times the refrigerating electric damper is opened/the refrigerating electric damper is closed:
If the average temperature of the refrigerating chamber/freezing chamber of the refrigerator meets the requirement below 4/-18 ℃ in the process of testing the power consumption, the number of times of opening the refrigerating electric air door and closing the refrigerating electric air door is not more than 3/3, and when the single starting period is T, the maintenance time T of the low-rotation-speed S1 operation of the compressor can be set to be t1+ [ delta ] T, wherein [ delta ] T is an allowable error value, and preferably 15 minutes, in consideration of the difference of the refrigerator. As long as the refrigerator is not stopped in the actual operation process when the single start-up time of the compressor exceeds t1+15 minutes, the refrigerator needs to be lifted to a high rotating speed S2.
If the average temperature of the refrigerating chamber/freezing chamber meets the requirement below 4/-18 ℃ in the process of testing the power consumption of the refrigerator, when the number of times of opening the refrigerating electric air door and closing the refrigerating electric air door exceeds 3/3 times, an experiment is needed to determine the maintenance time t required for the operation of the low rotating speed S1 before the compressor is lifted to the high rotating speed S2. The specific method comprises the following steps:
Selecting a group of time series, namely t1, t1+20min and t1+40min, firstly enabling the compressor to run for a time t1 at a low rotation speed S1, recording average power P1 corresponding to stable running of the time t1 after a temperature curve is stable, adjusting the maintenance running time of the low rotation speed S1 to t1+20min immediately, recording average power P2 corresponding to stable running of the time t1+20min after the temperature curve is stable, and obtaining the average power of stable running of the group of compressors at the rotation speed by analogy, and selecting the maintenance time corresponding to the low rotation speed S1 at lower power as a target value of time.
By the method, the low rotation speed S1, the high rotation speed S2 and the maintenance time of the low rotation speed S1 can be determined, so that relatively low power consumption of the refrigerator test can be obtained.
In addition to the low power consumption achieved by the above-described method of maintaining the time, the operation maintaining time of the low rotation speed S1 may be not restricted, but the rotation speed increase of the compressor may be controlled in the following manner. FIG. 5 is a flow chart of another embodiment of compressor speed and maintenance time selection.
The method comprises the steps of firstly selecting a group of arithmetic series as the rotating speed of a compressor, enabling the refrigerator to operate in an energy-saving state, recording steady-state power at the corresponding rotating speed and the times of opening/closing of a refrigerating electric air door in a single starting period of the compressor, selecting the rotating speed of the compressor corresponding to the times of opening/closing of a refrigerating electric air door with the lowest power and the higher refrigerating electric air door as a low rotating speed S1, and selecting the times of opening/closing of the refrigerating electric air door with the lowest power and the rotating speed of the compressor corresponding to the lower power as a high rotating speed S2.
And then selecting the time for increasing the rotation speed of the compressor, namely, the compressor operates at a low rotation speed S1, when the electric air door to be refrigerated is closed and the temperature of the freezing chamber is lower than the set temperature, the rotation speed of the compressor is increased to S2, or the compressor operates at the low rotation speed S1, and when the electric air door to be refrigerated is operated for a set number of times (for example, three times), the rotation speed of the compressor is increased to S2.
The specific control rules are as follows:
1. When the refrigerating chamber has refrigerating requirement, the refrigerating electric air door is opened, the compressor starts to operate at a low rotating speed S1, and when the refrigerating temperature is reduced to a stop point, the refrigerating electric air door is closed;
2. The temperature of the freezing chamber is higher than the starting point, the compressor continues to run at a low rotation speed S1, at the moment, the refrigerating capacity produced by the compressor is only used for cooling the freezing chamber, the temperature of the refrigerating chamber gradually rises during the period, when the refrigerating starting point is reached, the refrigerating electric air door is opened again, when the refrigerating temperature is reduced to the stopping point, the refrigerating electric air door is closed, and at the moment, whether the refrigerating temperature is lower than the starting point is detected;
if the temperature is lower than a certain value (allowable error value delta t), the delta t is preferably 0.5 ℃, the compressor is increased to a higher rotating speed S2 to run, and the freezing compartment is rapidly cooled;
if the temperature is not lower than the starting point by a certain value, the compressor still operates at a lower rotating speed S1.
In order to avoid that the temperatures of the refrigerating chamber and the freezing chamber can not meet the requirements for a long time, the compressor is always operated. Therefore, when the compressor is not stopped and the refrigerating and cooling times n reach three times, namely, the refrigerating electric air door is operated three times (the refrigerating electric air door is opened to the electric air door is closed once), the rotating speed of the compressor is increased to a high rotating speed S2 to operate.
The method can also determine the operation maintaining time of the low rotation speed S1, the high rotation speed S2 and the low rotation speed S1, thereby obtaining relatively low power consumption of the refrigerator test.
In order to ensure that the power consumption of the refrigerator is kept in a low range in an energy-saving state, the invention also provides the refrigerator, the rotation speed of the compressor is scientifically selected, the rotation speed of the compressor is reasonably and dynamically regulated, the power consumption is kept in a required limit value range, and the energy-saving effect is obvious.
It should be noted that modifications and variations can be made by those skilled in the art without departing from the inventive concept, and these modifications and variations are intended to fall within the scope of the claims.
Claims (9)
1. A method for detecting power consumption of a refrigerator, comprising:
Selecting a group of arithmetic series as the rotating speed of the compressor under the set environment temperature, so that the refrigerator runs in an energy-saving state, recording the steady-state power under the corresponding rotating speed and the times of opening/closing the refrigerating electric air door in a single starting period of the compressor, selecting the rotating speed of the compressor corresponding to the lowest power and the higher times as the low rotating speed S1, and selecting the rotating speed of the compressor corresponding to the lowest times and the lower power as the high rotating speed S2;
The compressor is switched to high-rotation-speed operation after running at a low rotation speed for a period of maintenance time, when the times of opening the refrigerating electric air door and closing the refrigerating electric air door exceeds the set times, a group of time duration sequences are selected, steady-state power under the corresponding time duration and the times of opening the refrigerating electric air door and closing the refrigerating electric air door in a single starting period of the compressor are recorded, and the time duration corresponding to the lowest power and the lower times is selected as the maintenance time of the low-rotation-speed operation;
and collecting the steady-state power consumption and defrosting power consumption of the refrigerator, and calculating the daily power consumption at the set environment temperature.
2. The method of claim 1, wherein the higher number of times is 3/3 times.
3. The method of claim 1, wherein the minimum number of times is 1/1.
4. The method of claim 1, wherein the low rotational speed is 1500r and the high rotational speed is 1800r.
5. The method of claim 1, wherein the set number of times is three.
6. A method for detecting power consumption of a refrigerator, comprising:
Selecting a group of arithmetic series as the rotating speed of the compressor under the set environment temperature, so that the refrigerator runs in an energy-saving state, recording the steady-state power under the corresponding rotating speed and the times of opening/closing the refrigerating electric air door in a single starting period of the compressor, selecting the rotating speed of the compressor corresponding to the lowest power and the higher times as the low rotating speed S1, and selecting the rotating speed of the compressor corresponding to the lowest times and the lower power as the high rotating speed S2;
The compressor is switched to high-speed operation after running at low speed for a period of maintenance time, wherein the maintenance time of the low-speed operation is determined in such a way that the compressor runs at low speed, when a refrigerating electric air door is closed and the temperature of a freezing chamber is lower than a set temperature, the compressor is lifted to high-speed operation, or the compressor runs at low speed, and when the action of the refrigerating electric air door from opening to closing reaches a set number of times, the compressor is lifted to high-speed operation;
and collecting the steady-state power consumption and defrosting power consumption of the refrigerator, and calculating the daily power consumption at the set environment temperature.
7. The method of claim 6, wherein the higher number of times is 3/3 times.
8. The method of claim 6, wherein the minimum number of times is 1/1.
9. The method of claim 6, wherein the low rotational speed is 1500r and the high rotational speed is 1800r.
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| CN112944798A (en) * | 2021-03-09 | 2021-06-11 | 珠海格力电器股份有限公司 | Refrigerator control method, refrigerator and storage medium |
| CN116558190A (en) * | 2023-06-07 | 2023-08-08 | Tcl家用电器（合肥）有限公司 | Direct-cooling refrigerator control method and device, direct-cooling refrigerator and storage medium |
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| CN116558190A (en) * | 2023-06-07 | 2023-08-08 | Tcl家用电器（合肥）有限公司 | Direct-cooling refrigerator control method and device, direct-cooling refrigerator and storage medium |
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