CN109764629B - Variable frequency refrigerator and control method thereof - Google Patents
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- CN109764629B CN109764629B CN201811508236.0A CN201811508236A CN109764629B CN 109764629 B CN109764629 B CN 109764629B CN 201811508236 A CN201811508236 A CN 201811508236A CN 109764629 B CN109764629 B CN 109764629B
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- 238000005057 refrigeration Methods 0.000 description 8
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Abstract
The invention provides a variable frequency refrigerator and a control method thereof, wherein the variable frequency refrigerator comprises a refrigerator body and a door body, wherein the refrigerator body is provided with a compartment, and a first temperature sensor is used for detecting the ambient temperature; a second temperature sensor for detecting the actual temperature of the compartment; a humidity sensor for detecting ambient humidity; the first temperature sensor, the second temperature sensor, the humidity sensor and the compressor are respectively connected with the control panel; the control board is used for acquiring a temperature difference between the actual temperature of the chamber and the preset temperature of the chamber, and the control board controls the rotating speed of the compressor according to the ambient temperature, the ambient humidity and the temperature difference.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a variable frequency refrigerator and a control method of the variable frequency refrigerator.
Background
Along with the popularization of the frequency conversion technology, the frequency conversion technology is gradually applied to the field of refrigerators, and compared with the traditional fixed frequency refrigerator, the frequency conversion refrigerator has the advantages of low energy consumption, low noise and the like, so that the frequency conversion refrigerator is more and more widely applied.
In the frequency conversion refrigerator, the working power of the frequency conversion compressor can be changed according to the rotation speed of the compressor, the state of the refrigerator, the number of articles placed in the refrigerator and the like. The more stable the working power of the inverter compressor is, the better the operating power of the inverter compressor is, that is, when the refrigerator is in a relatively stable external environment, the power of the inverter compressor is maintained at a stable value, and the operating power of the inverter compressor is not only as stable as possible but also can meet the refrigeration requirements of users in the current environment and the current load. For example, when the ambient temperature is high, the operation power of the inverter compressor of the refrigerator is higher than that of the inverter compressor when the ambient temperature is low, so as to meet the refrigeration requirement of a user; when the refrigerator is in a low-temperature environment, although the high running power of the inverter compressor can meet the refrigeration requirement, the power consumption of the refrigerator is higher, so that the running power of the inverter compressor is lower, and the energy and the power are saved while the refrigeration requirement of a user is met.
At present, the control mode of the existing frequency conversion refrigerator mainly controls the rotating speed of a compressor according to the set temperature of a refrigerator compartment, the control mode often causes overlarge rotating speed of the compressor and larger energy consumption loss, and the purpose of saving energy of the frequency conversion compressor cannot be effectively realized.
Therefore, it is necessary to provide a new inverter refrigerator and a control method thereof to achieve more intelligent inverter control and achieve the purposes of reducing energy consumption and improving refrigeration efficiency.
Disclosure of Invention
The invention aims to provide a variable frequency refrigerator and a control method of the variable frequency refrigerator. The rotating speed of the compressor is determined by comprehensively considering the environmental temperature, the environmental humidity and the temperature difference value of the refrigerator chamber, so that the refrigerating efficiency of the variable frequency refrigerator is improved while reasonable cooling is realized.
The invention provides a variable frequency refrigerator, which comprises a refrigerator body and a door body, wherein a chamber is arranged in the refrigerator body, and a first temperature sensor is arranged on the outer surface of the refrigerator body or the outer surface of the door body and used for detecting the ambient temperature; a second temperature sensor disposed in the compartment, the second temperature sensor being configured to detect an actual temperature of the compartment; the humidity sensor is arranged on the outer surface of the box body or the outer surface of the door body and used for detecting the environment humidity; a compressor; the first temperature sensor, the second temperature sensor, the humidity sensor and the compressor are respectively connected with the control panel; the control board is used for acquiring a temperature difference between the actual temperature of the chamber and the preset temperature of the chamber, and the control board controls the rotating speed of the compressor according to the ambient temperature, the ambient humidity and the temperature difference.
As an optional technical solution, the compartment includes a freezing chamber, and the second temperature sensor is disposed in the freezing chamber.
As optional technical solution, the system further comprises a rotation speed sensor, the control board and the compressor are respectively connected with the rotation speed sensor, the rotation speed sensor is used for detecting the actual rotation speed of the compressor, and the control board is used for acquiring the actual rotation speed.
As an optional technical solution, the controlling the rotation speed of the compressor by the control board according to the ambient temperature, the ambient humidity and the temperature difference specifically includes: the control board reads a plurality of preset environment temperature ranges, a plurality of preset environment humidity ranges and a plurality of preset temperature difference value ranges in the storage unit, compares the environment temperature with the plurality of preset environment temperature ranges, controls the actual rotating speed of the compressor to change to a preset rotating speed after the environment humidity and the plurality of preset environment humidity ranges and the temperature difference value and the plurality of preset temperature difference value ranges, wherein the preset rotating speed is greater than or equal to or less than the actual rotating speed.
As an optional technical solution, each preset ambient temperature range, each preset ambient humidity range, and each preset temperature difference range in the storage unit jointly determine the preset rotation speed.
As an optional technical solution, when the preset rotation speed is greater than the actual rotation speed, increasing the rotation speed of the compressor; when the preset rotating speed is equal to the actual rotating speed, the rotating speed of the compressor is kept unchanged; when the preset rotating speed is less than the actual rotating speed, the rotating speed of the compressor is reduced.
The invention also provides a control method of the inverter refrigerator, the inverter refrigerator comprises a compressor and a compartment, and the control method comprises the following steps:
s1, acquiring the ambient temperature, the ambient humidity and the temperature difference between the preset temperature of the chamber and the actual temperature of the chamber;
s2, comparing the environmental temperature with a plurality of preset environmental temperature ranges, the environmental humidity with a plurality of preset environmental humidity ranges, and the temperature difference with a plurality of preset temperature difference ranges; and
s3, controlling the actual rotating speed of the compressor to change to a preset rotating speed;
wherein the preset rotating speed is greater than or equal to or less than the actual rotating speed.
As an optional technical solution, the compartment is a freezing compartment of the refrigerator.
As an optional technical scheme, when the preset rotating speed is greater than the actual rotating speed, the rotating speed of the compressor is controlled to be increased; when the preset rotating speed is equal to the actual rotating speed, controlling to maintain the rotating speed of the compressor unchanged; and when the preset rotating speed is less than the actual rotating speed, controlling to reduce the rotating speed of the compressor.
As an optional technical solution, each preset ambient temperature range, each preset ambient humidity range, and each preset temperature difference range jointly determine the preset rotation speed.
Compared with the prior art, the method and the device have the advantages that the environmental temperature, the environmental humidity and the temperature difference value of the refrigerator chamber are jointly used as reference factors to determine the preset rotating speed of the compressor of the variable frequency refrigerator, so that the rotating speed control of the compressor of the variable frequency refrigerator is more intelligent, the refrigerating efficiency of the compressor is improved, and the energy consumption is saved.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a schematic view of a variable frequency refrigerator according to the present invention.
FIG. 2 is a functional block diagram of the inverter refrigerator of the present invention.
FIG. 3 is a flow chart of a control method of the inverter refrigerator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic view of a variable frequency refrigerator according to the present invention; FIG. 2 is a functional block diagram of the inverter refrigerator of the present invention.
As shown in fig. 1 and 2, the inverter refrigerator 100 includes a cabinet 101 and a door 102, the door 102 and the cabinet 101 are pivotally connected to each other, the cabinet 101 includes a plurality of compartments 103, and the compartments 103 include a refrigerating compartment 104 and a freezing compartment 105.
The first temperature sensor 10 is used for detecting an ambient temperature of an external environment of the refrigerator, the humidity sensor 20 is used for detecting an ambient humidity of the external environment of the refrigerator, and the first temperature sensor 10 and the humidity sensor 20 are respectively disposed on the door 102, but not limited thereto. In other embodiments of the present invention, the first temperature sensor and the humidity sensor may be respectively disposed on the box, or one of the first temperature sensor and the humidity sensor is disposed on the door, and the other is disposed on the box. In order to avoid the influence of the internal environment of the refrigerator 100 on the measurement results of the first temperature sensor 10 and the humidity sensor 20, the first temperature sensor 10 and the humidity sensor 20 are preferably disposed on the outer surface of the cabinet 101 and/or the door 102.
The second temperature sensor 30 is disposed in one of the compartments 103, and preferably, the second temperature sensor 30 is disposed in the freezing compartment 105 for detecting an actual temperature of the freezing compartment 105.
The compressor 40 is disposed at the bottom of the back side of the box 101, wherein the first temperature sensor 10, the humidity sensor 20, the second temperature sensor 30 and the compressor 40 are respectively connected to the control board 50. The above connection in the present invention means that the first temperature sensor 10, the humidity sensor 20, the second temperature sensor 30 and the compressor 40 can perform data communication with the control board 50, that is, the control board 50 can obtain the ambient temperature detected by the first temperature sensor 10, the ambient humidity detected by the humidity sensor 20, the actual temperature of the freezing chamber 105 detected by the second temperature sensor 30 and control the actual rotation speed of the compressor 40 to change to the preset rotation speed; the actual rotation speed of the compressor 40 can be detected by the rotation speed sensor 60, and the rotation speed sensor 60 can also perform data communication with the control board 50, so as to transmit the detected actual rotation speed of the compressor 40 to the control board 50.
The control board 50 further includes a storage unit for storing a plurality of preset ranges of ambient temperature, a plurality of preset ranges of ambient humidity, and a plurality of preset ranges of temperature difference, wherein each of the preset ranges of ambient temperature, the preset ranges of ambient humidity, and the preset ranges of temperature difference corresponds to a preset rotation speed of the compressor, and the preset rotation speed of the compressor is defined as the preset rotation speed. That is, a plurality of preset ranges of the ambient temperature, a plurality of preset ranges of the ambient humidity, and a plurality of preset ranges of the temperature difference, and a plurality of preset rotation speeds of the compressor corresponding to the preset ranges of the ambient temperature, the preset ranges of the ambient humidity, and the preset ranges of the temperature difference constitute a database sample, that is, the database sample is stored in the storage unit. After the control board 50 obtains the actual ambient temperature, ambient humidity and temperature difference value in the operation process of the current refrigerator 100, comparing the ambient temperature with a plurality of ambient temperature preset ranges in the database sample, comparing the ambient humidity with a plurality of ambient humidity preset ranges in the database sample, and comparing the temperature difference value with a plurality of temperature difference value preset ranges in the database sample, thereby obtaining the preset rotation speed of the compressor 40 in the database sample corresponding to the current ambient temperature, ambient humidity and temperature difference value; the control board 50 continuously controls the rotation speed of the compressor 40 to be adjusted to a preset rotation speed, where the preset rotation speed may be greater than the current actual rotation speed of the compressor 40, or the preset rotation speed may be smaller than the current actual rotation speed of the compressor 40, or the preset rotation speed is the same as the current actual rotation speed of the compressor 40.
Further, when the preset rotation speed is greater than the current actual rotation speed of the compressor 40, the control board 50 outputs a first signal to control the rotation speed of the compressor 40 to increase; when the preset rotating speed is less than the current actual rotating speed of the compressor 40, the control board 50 outputs a second signal to control the rotating speed of the compressor 40 to be reduced; when the preset rotating speed is equal to the current actual rotating speed of the compressor 40, the control board 50 outputs a third signal to control the rotating speed of the compressor 40 to be kept unchanged; wherein, the output of the first signal increases the power consumption of the compressor 40; the output of the second signal reduces the energy consumption of the compressor 40; the output of the third signal, the power consumption of the compressor 40 remains unchanged. The above manner of controlling the rotation speed of the compressor 40 is based on the actual operation environment of the refrigerator 100, so that the refrigeration efficiency of the refrigerator 100 can be more intelligently controlled, and the power consumption can be reduced. Compared with the existing control method for controlling the rotating speed of the compressor according to the set temperature of the compartment of the refrigerator, the control method takes the temperature difference of the compartment of the refrigerator as one of the reference values, so that the cooling of the inverter refrigerator can be reasonably controlled, and the refrigerating efficiency of the inverter refrigerator is improved.
In this embodiment, the preset speed N of the compressor 40 is determined by the ambient temperature T0The ambient humidity d and the temperature difference Delta T of the refrigerator compartment are controlled together by respectively adjusting the ambient temperature T0The method comprises the steps of dividing the temperature difference value delta T of a refrigerator chamber into a plurality of preset ranges of environmental temperature, dividing the environmental humidity d into a plurality of preset ranges of environmental humidity, dividing the temperature difference value delta T of the refrigerator chamber into a plurality of preset ranges of temperature difference value, and detecting each preset range of environmental temperature, each preset range of environmental humidity and the preset rotating speed N corresponding to each preset range of temperature difference value. The division areas of the multiple environmental temperature preset ranges, the multiple environmental humidity preset ranges and the multiple temperature difference value preset ranges can be set automatically according to actual requirements.
Table 1 is a database sample collection table of the preset rotation speed N of the compressor of the present invention.
Wherein, T0For example, comprising T0≤t1；t1＜T0≤t2；t2＜T0≤t3；……；tn-1＜T0≤tn. When a database of preset rotational speeds N is acquired, for example, T is first determined0And then sequentially measuring the preset rotating speed N corresponding to each environmental humidity and each temperature difference value, and further establishing a database sample.
In a specific embodiment of the present invention, a plurality of preset ranges of ambient temperature T are measured for a type of refrigerator0(T0≤16℃；16℃＜T0≤25℃；25℃＜T0≤35℃；T0More than 35 ℃), a plurality of preset ranges d of environmental humidity (d is 0-20%; 20 to 40 percent; 40-60 percent; 60 to 80 percent; 80-100%) ofAnd a plurality of temperature difference values of the refrigerator compartment are within a preset range delta T (delta T is less than or equal to 0.5, delta T is more than 0.5 and less than or equal to 1, delta T is more than 1 and less than or equal to 1.5, delta T is more than 1.5 and less than or equal to 2, delta T is more than 2 and less than or equal to 2.5, delta T is more than 2.5), and the preset rotating speed N of the compressor.
Table 2 shows the ambient temperature T0And the temperature difference delta T between the environment humidity d and the refrigerator chamber and the preset rotating speed N are less than or equal to 16 ℃.
TABLE 2, T0≤16℃；
Table 3 shows T at 16 ℃ < T0And when the temperature is less than or equal to 25 ℃, the environmental humidity d, the temperature difference delta T of the refrigerator chamber and the preset rotating speed N.
TABLE 3T < 16 ℃ >0≤25℃
Table 4 shows the ambient temperature < T25 ℃0And the temperature difference delta T between the environment humidity d and the refrigerator chamber and the preset rotating speed N are less than or equal to 35 ℃.
TABLE 4T at 25 ℃ < T0≤35℃
Table 5 shows the ambient temperature T0And when the temperature is higher than 35 ℃, the environmental humidity d, the temperature difference delta T of the refrigerator chamber and the preset rotating speed N form a database sample.
TABLE 5, T0＞35℃
Note: in tables 1 to 5, units rps of the rotation speed N are preset.
When the rotational speed of the compressor of the refrigerator is controlled, the control board 50 reads data in the sample database based on the ambient temperature, the ambient humidity, and the temperature difference of the freezing chamber of the refrigerator to obtain a preset rotational speed of the compressor.
Firstly, the first temperature sensor 10 detects the ambient temperature, and the control board 50 acquires and judges the preset range of the ambient temperature where the ambient temperature is located; secondly, the humidity sensor 20 detects the ambient humidity, and the control board 50 acquires and judges the preset range of the ambient humidity where the ambient humidity is located; then, the second sensor 30 detects the temperature of the freezing chamber of the refrigerator 100, the control board 50 obtains the actual temperature of the freezing chamber, obtains the temperature difference between the preset temperature and the actual temperature of the freezing chamber according to the preset temperature of the freezing chamber, and continuously judges the preset range of the temperature difference where the temperature difference is located, thereby obtaining the preset rotating speed of the compressor under the current refrigerator operating environment.
Further, the rotation speed sensor 60 is configured to detect an actual rotation speed of the compressor 40, the control board 50 obtains and determines whether the actual rotation speed is different from a preset rotation speed, and when the actual rotation speed is less than the preset rotation speed, the control board controls to increase the rotation speed of the compressor; when the actual rotating speed is greater than the preset rotating speed, controlling to reduce the rotating speed of the compressor; and when the actual rotating speed is the same as the preset rotating speed, controlling and maintaining the rotating speed of the compressor.
It should be noted that the first temperature sensor 10, the humidity sensor 20, the second temperature sensor 30 and the rotation speed sensor 60 respectively monitor various parameters at the same time, and transmit the measured parameters to the control board 50 at the same time. The control board 50 is not limited to comparing the ambient temperature with the preset range of the ambient temperature, and in other embodiments of the present invention, the control board 50 may also compare the ambient humidity with the preset range of the ambient humidity, or the control board 50 may also compare the temperature difference with the preset range of the temperature difference.
The invention also provides a compressor control method of the variable frequency refrigerator, the variable frequency refrigerator comprises a first temperature sensor, a humidity sensor, a second temperature sensor, a compressor, a control panel and a rotation speed sensor, the first temperature sensor, the humidity sensor, the second temperature sensor, the compressor and the rotation speed sensor are respectively connected with the control panel, and the rotation speed sensor is also connected with the compressor; the system comprises a first sensor, a second temperature sensor, a speed sensor and a control module, wherein the first sensor is used for detecting ambient temperature, the humidity sensor is used for detecting ambient humidity, the second temperature sensor is used for detecting the actual temperature of a compartment (such as a freezing compartment) of the variable frequency refrigerator, and the speed sensor is used for detecting the actual speed of a compressor of the variable frequency refrigerator; the control method of the compressor comprises the following steps:
step S1, acquiring the ambient temperature, the ambient humidity and the temperature difference between the preset temperature of the refrigerator chamber and the actual temperature of the refrigerator chamber;
step S2, comparing the environmental temperature with a plurality of preset environmental temperature ranges, the environmental humidity with a plurality of preset environmental humidity ranges, and the temperature difference with a plurality of preset temperature difference ranges; and
step S3, controlling the actual rotating speed of the compressor to change to a preset rotating speed;
wherein the preset rotating speed is greater than or equal to or less than the actual rotating speed.
The preset rotation speed in step S3 corresponds to the preset rotation speed, and the preset rotation speed is obtained by the control board from the database sample of the storage unit.
In summary, the present invention uses the ambient temperature, the ambient humidity, and the temperature difference between the compartments of the refrigerator as reference factors to determine the preset rotation speed of the compressor of the inverter refrigerator, so that the rotation speed control of the compressor of the inverter refrigerator is more intelligent, thereby improving the refrigeration efficiency of the compressor and saving energy consumption.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a frequency conversion refrigerator, includes box and door body, has the compartment in this box, its characterized in that:
the first temperature sensor is arranged on the outer surface of the box body or the outer surface of the door body and used for detecting the ambient temperature;
the second temperature sensor is arranged in the compartment and used for detecting the actual temperature of the compartment, the compartment comprises a freezing chamber, and the second temperature sensor is arranged in the freezing chamber;
the humidity sensor is arranged on the outer surface of the box body or the outer surface of the door body and used for detecting the environment humidity;
a compressor; and
the first temperature sensor, the second temperature sensor, the humidity sensor and the compressor are respectively connected with the control board;
the control panel acquires a temperature difference between the actual temperature of the chamber and the preset temperature of the chamber under the normal operation state of the variable frequency refrigerator, and controls the rotating speed of the compressor according to the ambient temperature, the ambient humidity and the temperature difference;
the frequency conversion refrigerator also comprises a rotating speed sensor, the control panel and the compressor are respectively connected with the rotating speed sensor, the rotating speed sensor is used for detecting the actual rotating speed of the compressor, and the control panel is used for acquiring the actual rotating speed; the control panel controls the rotating speed of the compressor according to the environment temperature, the environment humidity and the temperature difference, and specifically comprises: the control board reads a plurality of preset environment temperature ranges, a plurality of preset environment humidity ranges and a plurality of preset temperature difference value ranges in the storage unit, compares the environment temperature with the plurality of preset environment temperature ranges, controls the actual rotating speed of the compressor to change to a preset rotating speed after the environment humidity and the plurality of preset environment humidity ranges and the temperature difference value and the plurality of preset temperature difference value ranges, wherein the preset rotating speed is greater than or equal to or less than the actual rotating speed.
2. The inverter refrigerator according to claim 1, wherein each of the predetermined ambient temperature ranges, each of the predetermined ambient humidity ranges and each of the predetermined temperature difference ranges in the storage unit jointly determine the predetermined rotational speed.
3. The inverter refrigerator according to claim 1, wherein when the preset rotation speed is greater than the actual rotation speed, the rotation speed of the compressor is increased; when the preset rotating speed is equal to the actual rotating speed, the rotating speed of the compressor is kept unchanged; when the preset rotating speed is less than the actual rotating speed, the rotating speed of the compressor is reduced.
4. A control method of an inverter refrigerator, the inverter refrigerator comprises a compressor and a compartment, and is characterized in that the control method comprises the following steps:
s1, acquiring the ambient temperature, the ambient humidity and the temperature difference between the preset temperature of the chamber and the actual temperature of the chamber;
s2, comparing the environmental temperature with a plurality of preset environmental temperature ranges, the environmental humidity with a plurality of preset environmental humidity ranges, and the temperature difference with a plurality of preset temperature difference ranges; and
s3, controlling the actual rotating speed of the compressor to change to a preset rotating speed;
wherein the preset rotating speed is greater than or equal to or less than the actual rotating speed.
5. The control method as claimed in claim 4, wherein the compartment is a freezing compartment of the refrigerator.
6. The control method as claimed in claim 4, wherein when the preset rotation speed is greater than the actual rotation speed, controlling to increase the rotation speed of the compressor; when the preset rotating speed is equal to the actual rotating speed, controlling to maintain the rotating speed of the compressor unchanged; and when the preset rotating speed is less than the actual rotating speed, controlling to reduce the rotating speed of the compressor.
7. The control method of claim 4, wherein each predetermined ambient temperature range, each predetermined ambient humidity range, and each predetermined temperature difference range collectively determine the predetermined rotational speed.
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| CN112177910A (en) * | 2019-07-04 | 2021-01-05 | 多美达瑞典有限公司 | Compressor rotating speed control method of mobile refrigerator and mobile refrigerator |
| CN115435543B (en) * | 2021-06-02 | 2023-07-21 | 青岛海尔生物医疗股份有限公司 | Method and device for controlling variable frequency compressor of refrigerator and refrigerator |
| CN115183509B (en) * | 2022-07-18 | 2023-05-16 | 四川虹美智能科技有限公司 | Rotational speed control method and device, equipment and medium of variable frequency compressor |
| CN117516017A (en) * | 2024-01-08 | 2024-02-06 | 湖南诺迪冷冻设备有限公司 | Cold air conditioning device for variable-frequency energy-saving clothes closet |
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