CN115468350A - Calculation Method of Refrigerator and Its Ambient Temperature - Google Patents

Abstract

The invention discloses a refrigerator, comprising: a cabinet serving as a support structure of the refrigerator, having a heat-insulating function, and providing an assembly space for various components of the refrigerator; the refrigerating system provides a refrigerating function for the refrigerator; the controller is configured to: responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy; controlling the operation of a compressor in the refrigeration system according to the initial ambient temperature; when the preset compressor running condition is met, the starting rate of the compressor is obtained; and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigeration system by using the target environment temperature. The invention also discloses a method for calculating the ambient temperature of the refrigerator. By adopting the embodiment of the invention, the ambient temperature around the refrigerator can be estimated, the method is suitable for the refrigerator without the environment temperature sensor, and meanwhile, the condition that the refrigerator with the environment temperature sensor cannot work normally due to the damage of the environment temperature sensor can be avoided.

Description

Refrigerator and ambient temperature calculation method thereof

Technical Field

The invention relates to the technical field of refrigerators, in particular to a refrigerator and an ambient temperature calculation method thereof.

Background

An environment temperature sensor for collecting environment temperature is usually arranged in the existing refrigerator, and the working process of power utilization parts such as a compressor, a fan, a temperature controller and the like is controlled according to the environment temperature by collecting the environment temperature. The ring temperature sensor is generally placed in a hinge cover of the door body or a display control plate, so that the refrigerator can sense the ring temperature accurately. However, the temperature sensor is additionally arranged, and meanwhile, the wiring harness is required to be additionally arranged to connect the temperature sensor to the main board for control, so that the cost of the refrigerator is increased, and once the temperature sensor is damaged, the refrigerator cannot normally work if the temperature sensor is not replaced in time, and the refrigerator cannot normally refrigerate.

Disclosure of Invention

The embodiment of the invention aims to provide a refrigerator and an ambient temperature calculation method thereof, which can estimate the ambient temperature around the refrigerator, are suitable for the refrigerator without an ambient temperature sensor, and can avoid the condition that the refrigerator with the ambient temperature sensor cannot work normally due to the damage of the ambient temperature sensor.

To achieve the above object, an embodiment of the present invention provides a refrigerator, including:

a cabinet serving as a support structure of the refrigerator, having a heat-insulating function, and providing an assembly space for various components of the refrigerator;

the refrigerating system provides a refrigerating function for the refrigerator;

the controller is configured to:

responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy;

controlling the operation of a compressor in the refrigeration system according to the initial environment temperature;

when preset compressor running conditions are met, the starting rate of the compressor is obtained;

and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigeration system by using the target environment temperature.

As a refinement of the above, the compressor operating conditions include at least one of:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

As an improvement of the above solution, the initial ambient temperature calculation strategy satisfies the following formula:

T₀ ＝a*Q-c；

wherein, T₀ And taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

As an improvement of the above scheme, the target ambient temperature calculation strategy satisfies the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, η is the turn-on ratio, and d is a constant.

As an improvement of the above, the controller is further configured to:

and when the gear in the refrigerator is detected to be changed, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

In order to achieve the above object, an embodiment of the present invention further provides a method for calculating an ambient temperature of a refrigerator, including:

responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy;

controlling the operation of a compressor in a refrigeration system of the refrigerator according to the initial ambient temperature;

when preset compressor operation conditions are met, acquiring the starting rate of the compressor;

and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigerating system by applying the target environment temperature.

As a refinement of the above, the compressor operating conditions include at least one of:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

As an improvement of the above solution, the initial ambient temperature calculation strategy satisfies the following formula:

T₀ ＝a*Q-c；

wherein, T₀ And taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

As an improvement of the above scheme, the target ring temperature calculation strategy satisfies the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, η is the turn-on ratio, and d is a constant.

As a refinement of the above, the method further comprises;

and when the change of the gear in the refrigerator is detected, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

Compared with the prior art, the refrigerator and the ambient temperature calculation method thereof provided by the embodiment of the invention have the advantages that the initial ambient temperature is calculated according to the initial ambient temperature calculation strategy when the refrigerator is powered on, so that the refrigerator can normally control the normal operation of the refrigeration system according to the estimated initial ambient temperature in the power-on stage, after the compressor operates for a period of time and the compressor meets the operation condition of the compressor, the target ambient temperature is calculated according to the start-up rate of the compressor, the start-up rate of the compressor is in direct proportion to the ambient temperature, so that the ambient temperature of the refrigerator can be accurately estimated according to the start-up rate of the compressor, and after the target ambient temperature is obtained, the operation of the refrigeration system is controlled according to the target ambient temperature. The refrigerator and the ambient temperature calculation method thereof in the embodiment of the invention can estimate the ambient temperature around the refrigerator, are suitable for the refrigerator without the ambient temperature sensor, and can avoid the condition that the refrigerator with the ambient temperature sensor cannot work normally due to the damage of the ambient temperature sensor.

Drawings

Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an operation of a controller in a refrigerator according to an embodiment of the present invention;

fig. 3 is a flowchart of an ambient temperature calculation method for a refrigerator according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention, where the refrigerator includes:

a cabinet serving as a support structure of the refrigerator, having a heat-insulating function, and providing an assembly space for various components of the refrigerator;

the refrigerating system provides a refrigerating function for the refrigerator;

the controller is configured to:

responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy;

controlling the operation of a compressor in the refrigeration system according to the initial environment temperature;

when preset compressor operation conditions are met, acquiring the starting rate of the compressor;

and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigeration system by using the target environment temperature.

It is worth to be noted that the refrigerator in the embodiment of the present invention is a refrigerator without an ambient temperature sensor, or the refrigerator is a refrigerator with an ambient temperature sensor but damaged by the ambient temperature sensor. The refrigeration system includes, but is not limited to: the system comprises an evaporator, a condenser, a compressor, a capillary tube, a fan, an air duct, a room temperature sensor and the like.

Specifically, when the refrigerator is powered on, the initial environment temperature is calculated according to the initial environment temperature calculation strategy, and the initial environment temperature calculation strategy meets the following formula:

T₀ ＝a*Q-c；

wherein, T₀ And b, taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

Illustratively, the estimated initial ambient temperature T of the refrigerator₀ Dividing the temperature into several temperature ranges from low to high, the operating power of the compressor being different for different temperature ranges, e.g. the initial ring temperature T₀ Can be divided into intervals of 0 ≦ T₀ ≤10℃，10＜T₀ ≤20℃，20＜T₀ ≤30℃，30＜T₀ ≤40℃，40＜T₀ . When the refrigerator is powered on, a user can manually select the running power of the compressor during the power-on, and then the initial environment temperature is calculated according to the running power. Since the operation power Q of the refrigerator is different when the refrigerator is in different environmental temperatures, generally, the higher the loop temperature T, the larger the operation power Q, and the relationship between the loop temperature and the operation power can be referred to table 1.

TABLE 1 relationship of Ring temperature to operating Power

Actual operating power	40W	45W	50W	55W	60W
						Initial Ring temperature (. Degree. C.)	2*40-75＝5	2*45-75＝15	2*50-75＝25	2*55-75＝35	2*60-75＝45
The ring temperature falls within the range	0≤T≤10℃	10＜T≤20℃	20＜T≤30℃	30＜T≤40℃	40＜T

Specifically, after the initial ring temperature is obtained, the initial ring temperature is estimated and is not an accurate ambient temperature, and the initial ring temperature is used for controlling a refrigeration system when the refrigerator is powered on, for example, controlling the working process of the electric components such as the compressor, the fan, and the temperature controller.

After the refrigerator is operated, judging whether the compressor meets the compressor operation condition, wherein the compressor operation condition comprises at least one of the following conditions:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

Illustratively, the run time threshold is 6h and the variance threshold is 5%. When the preset operation condition of the compressor is met, the starting rate of the compressor is obtained, and the starting rate of the compressor meets the following formula: on-time = compressor on time/(compressor on time + compressor off time).

After the start-up rate of the compressor is obtained through calculation, calculating a target environment temperature according to the start-up rate and a preset target ring temperature calculation strategy, wherein the target ring temperature calculation strategy meets the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, η is the turn-on ratio, and d is a constant.

For example, the higher the ring temperature T, the greater the compressor on-time η, and the relationship between the ring temperature and the on-time η can be referred to table 2.

TABLE 2 relationship between ring temperature and on-time ratio

After the target ambient temperature is obtained through calculation, the operation of the refrigeration system, for example, the operation of the compressor and the fan, is controlled according to the temperature interval corresponding to the target ambient temperature, which may be referred to in table 3.

Operating conditions	Speed of compressor	Rotating speed of fan
			When the environmental temperature T is more than 40 DEG C	3900RPM	1400RPM
T is more than 30 and less than or equal to 40 DEG C	3500RPM	1300RPM
			T is more than 20 and less than or equal to 30 DEG C	3000RPM	1200RPM
T is more than 10 and less than or equal to 20 DEG C	2000RPM	1100RPM
			T is more than or equal to 0 and less than or equal to 10 DEG C	1500RPM	1050RPM

According to the method, the control strategy of the main control board for the temperature start-up and shutdown temperatures of the refrigerator room at different environment temperatures is as shown in the following table 4.

TABLE 4 control strategy of main control board for controlling temperature on-off temperature of refrigerator room at different environmental temperatures

It should be noted that the above example only represents that the controller can control the start-stop temperature of the refrigerator according to the ambient temperature signal, such as the rotational speed of the compressor, the rotational speed of the fan, and the start-stop temperature of the temperature sensor at different gears, and the specific parameter may be the above parameter or may be a range or other parameters.

Further, the controller is further configured to:

and when the gear in the refrigerator is detected to be changed, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

For example, when the gear of the refrigerator is changed, the frequency of the compressor may be changed (for example, the gear is manually adjusted to be increased, the cooling requirement is increased, and the frequency of the compressor is also increased), and the target ambient temperature estimated at this time may be incorrect, so that the initial ambient temperature needs to be recalculated, and then the target ambient temperature needs to be calculated.

Further, the work flow of the controller can also refer to fig. 2.

Compared with the prior art, the refrigerator provided by the embodiment of the invention has the advantages that the initial environment temperature is calculated according to the initial environment temperature calculation strategy when the refrigerator is powered on, so that the refrigerator can normally control the normal operation of the refrigerating system according to the estimated initial environment temperature in the power-on stage, the target environment temperature is calculated according to the start-up rate of the compressor after the compressor operates for a period of time and the compressor meets the operation condition of the compressor, the start-up rate of the compressor is in direct proportion to the environment temperature, the environment temperature of the refrigerator can be accurately estimated according to the start-up rate of the compressor, and the operation of the refrigerating system is controlled according to the target environment temperature after the target environment temperature is obtained. The refrigerator provided by the embodiment of the invention can estimate the ambient temperature around the refrigerator, is suitable for the refrigerator without the environment temperature sensor, and can also avoid the condition that the refrigerator with the environment temperature sensor cannot work normally due to the damage of the environment temperature sensor.

Referring to fig. 3, fig. 3 is a flowchart of an ambient temperature calculation method for a refrigerator according to an embodiment of the present invention, where the ambient temperature calculation method for a refrigerator includes:

s1, responding to power-on operation of a refrigerator, and calculating initial environment temperature according to a preset initial environment temperature calculation strategy;

s2, controlling the operation of a compressor in a refrigerating system of the refrigerator according to the initial environment temperature;

s3, when preset compressor running conditions are met, obtaining the starting rate of the compressor;

and S4, calculating a target environment temperature according to the starting rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigerating system by applying the target environment temperature.

It is worth to be noted that the refrigerator in the embodiment of the present invention is a refrigerator without an ambient temperature sensor, or the refrigerator is a refrigerator with an ambient temperature sensor but damaged. The refrigeration system includes, but is not limited to: the system comprises an evaporator, a condenser, a compressor, a capillary tube, a fan, an air duct, a room temperature sensor and the like.

Specifically, in step S1, when the refrigerator is powered on, an initial ambient temperature is calculated according to the initial ambient temperature calculation strategy, where the initial ambient temperature calculation strategy satisfies the following formula:

T₀ ＝a*Q-c；

wherein, T₀ And taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

Illustratively, the estimated initial ambient temperature T of the refrigerator₀ Dividing the temperature into several temperature ranges from low to high, wherein the operating powers of the compressors corresponding to the different temperature ranges are different, such as the initial ring temperature T₀ Can be divided into intervals of 0 ≦ T₀ ≤10℃，10＜T₀ ≤20℃，20＜T₀ ≤30℃，30＜T₀ ≤40℃，40＜T₀ . When the refrigerator is powered on, a user can manually select the running power of the compressor during the power-on, and then the initial environment temperature is calculated according to the running power. Since the operation power Q of the refrigerator is different when the refrigerator is in different environmental temperatures, generally, the higher the loop temperature T, the larger the operation power Q, and the relationship between the loop temperature and the operation power can be referred to table 1.

TABLE 1 relationship between Ring temperature and operating Power

Actual operating power	40W	45W	50W	55W	60W
						Initial Ring temperature (. Degree. C.)	2*40-75＝5	2*45-75＝15	2*50-75＝25	2*55-75＝35	2*60-75＝45
The environmental temperature falls within the range	0≤T≤10℃	10＜T≤20℃	20＜T≤30℃	30＜T≤40℃	40＜T

Specifically, in step S2, after the initial ambient temperature is obtained, since the initial ambient temperature is estimated and is not an accurate ambient temperature, the initial ambient temperature is used to control a refrigeration system when the refrigerator is powered on, for example, to control a working process of the compressor, the fan, the temperature controller, and other electrical components.

Specifically, in step S3, after the refrigerator is operated, it is determined whether the compressor satisfies the compressor operation condition, where the compressor operation condition includes at least one of:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

Illustratively, the run time threshold is 6h and the deviation threshold is 5%. When the preset operation condition of the compressor is met, the starting rate of the compressor is obtained, and the starting rate of the compressor meets the following formula: on-time = compressor on time/(compressor on time + compressor off time).

Specifically, in step S4, after the on-time rate of the compressor is calculated, the target ambient temperature is calculated according to a preset target ambient temperature calculation strategy according to the on-time rate, where the target ambient temperature calculation strategy satisfies the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, eta is the turn-on rate, and d is a constant.

For example, the higher the ring temperature T, the greater the compressor on-time η, and the relationship between the ring temperature and the on-time η can be referred to table 2.

TABLE 2 relationship between ring temperature and on-time ratio

After the target ambient temperature is obtained through calculation, the operation of the refrigeration system, for example, the operation of the compressor and the fan, is controlled according to the temperature interval corresponding to the target ambient temperature, which may be referred to in table 3.

Operating conditions	Speed of compressor	Rotating speed of fan
			When the ring temperature T is more than 40 DEG C	3900RPM	1400RPM
T is more than 30 and less than or equal to 40 DEG C	3500RPM	1300RPM
			T is more than 20 and less than or equal to 30 DEG C	3000RPM	1200RPM
T is more than 10 and less than or equal to 20 DEG C	2000RPM	1100RPM
			T is more than or equal to 0 and less than or equal to 10 DEG C	1500RPM	1050RPM

Further, the method for calculating the ambient temperature of the refrigerator further includes:

and S5, when the gear in the refrigerator is detected to be changed, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

For example, when the gear of the refrigerator is changed, the frequency of the compressor may be changed (for example, the gear is manually adjusted to increase, the refrigeration requirement increases, and the frequency of the compressor also increases), and the target ambient temperature estimated at this time may be incorrect, so that the initial ambient temperature needs to be recalculated, and then the target ambient temperature needs to be calculated.

Compared with the prior art, the method for calculating the ambient temperature of the refrigerator provided by the embodiment of the invention has the advantages that the initial ambient temperature is calculated according to the initial ambient temperature calculation strategy when the refrigerator is powered on, so that the refrigerator can normally control the normal operation of the refrigeration system according to the estimated initial ambient temperature in the power-on stage, after the compressor operates for a period of time and the compressor meets the operation condition of the compressor, the target ambient temperature is calculated according to the start-up rate of the compressor, the start-up rate of the compressor is in direct proportion to the ambient temperature, so that the ambient temperature of the refrigerator can be accurately estimated according to the start-up rate of the compressor, and after the target ambient temperature is obtained, the operation of the refrigeration system is controlled according to the target ambient temperature. The method for calculating the ambient temperature of the refrigerator can estimate the ambient temperature around the refrigerator, is suitable for the refrigerator without the environment temperature sensor, and can avoid the condition that the refrigerator with the environment temperature sensor cannot work normally due to the damage of the environment temperature sensor.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A refrigerator, characterized by comprising:

a cabinet serving as a support structure of the refrigerator, having a heat-insulating function, and providing an assembly space for various components of the refrigerator;

the refrigerating system provides a refrigerating function for the refrigerator;

the controller is configured to:

responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy;

controlling the operation of a compressor in the refrigeration system according to the initial environment temperature;

when preset compressor running conditions are met, the starting rate of the compressor is obtained;

and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigeration system by using the target environment temperature.

2. The refrigerator of claim 1, wherein the compressor operating conditions include at least one of:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

3. The refrigerator of claim 1, wherein the initial ambient temperature calculation strategy satisfies the following equation:

T₀ ＝a*Q-c；

wherein, T₀ And b, taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

4. The refrigerator of claim 1, wherein the target ambient temperature calculation strategy satisfies the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, η is the turn-on ratio, and d is a constant.

5. The refrigerator of claim 1, wherein the controller is further configured to:

and when the gear in the refrigerator is detected to be changed, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

6. An ambient temperature calculation method of a refrigerator, comprising:

responding to the power-on operation of the refrigerator, and calculating the initial environment temperature according to a preset initial environment temperature calculation strategy;

controlling the operation of a compressor in a refrigeration system of the refrigerator according to the initial ambient temperature;

when preset compressor operation conditions are met, acquiring the starting rate of the compressor;

and calculating the target environment temperature according to the start-up rate and a preset target environment temperature calculation strategy so as to control the operation of the refrigerating system by applying the target environment temperature.

7. The ambient temperature calculation method of a refrigerator according to claim 6, wherein the compressor operation condition includes at least one of:

the running time of the compressor is greater than the preset running time threshold;

and the deviation of the starting rates of the compressors in the last two compressor running periods is smaller than a preset deviation threshold value.

8. The ambient temperature calculation method of a refrigerator according to claim 6, wherein the initial ambient temperature calculation strategy satisfies the following equation:

T₀ ＝a*Q-c；

wherein, T₀ And taking the initial environment temperature as a, taking a as a proportionality coefficient, taking Q as preset running power of the compressor, and taking c as a constant.

9. The ambient temperature calculation method of a refrigerator according to claim 6, wherein the target ambient temperature calculation strategy satisfies the following formula:

T₁ ＝b*η-d；

wherein, T₁ B is a proportionality coefficient, η is the turn-on ratio, and d is a constant.

10. The ambient temperature calculation method of a refrigerator according to claim 6, further comprising;

and when the gear in the refrigerator is detected to be changed, calculating the initial environment temperature again according to a preset initial environment temperature calculation strategy.

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