CN112082323B

CN112082323B - Refrigerator control method

Info

Publication number: CN112082323B
Application number: CN202010981995.XA
Authority: CN
Inventors: 陈俊; 汤申杰; 刘全义
Original assignee: Changhong Meiling Co Ltd
Current assignee: Changhong Meiling Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2022-02-01
Anticipated expiration: 2040-09-17
Also published as: CN112082323A

Abstract

The invention discloses a refrigerator control method, and relates to the technical field of refrigerators. The method comprises the steps of presetting the rated rotating speed of a condensing fan motor as Scon _ fan0, the rated highest rotating speed of the condensing fan motor as Scon _ fan-max, a first threshold value as delta S1 and a second threshold value as delta S2; setting a first maximum rotating speed limit value of the variable frequency compressor as Scom1, setting a second maximum rotating speed limit value as Scom2, calculating a difference value between Scon _ fan and Scon _ fan0 to obtain delta S, comparing the delta S with a second threshold delta S2, judging the dirty blockage condition of the condenser, and operating a dirty blockage program A or a dirty blockage program B of the condenser. According to the condenser dirty-blockage state detection method and device, real-time actual running rotating speed of the condensing fan motor and the variable frequency compressor is compared with the preset threshold value and the maximum rotating speed limit value, the dirty-blockage state of the condenser is obtained through the difference value between the actual rotating speed and the preset rotating speed, and the problem that the dirty-blockage state of the existing condenser cannot be detected and obtained is solved.

Description

Refrigerator control method

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator control method.

Background

Along with the continuous improvement of the people level, the market proportion of large-volume refrigerator products is higher and higher, on the other hand, the attention degree of people to environmental protection is higher and higher, and the energy consumption regulation requirements of various countries in the world on the refrigerator products are also continuously improved. Based on this background, the external air-cooled condenser is applied to the refrigerator products more and more widely.

At present, the design scheme of the external air-cooled condenser is generally as follows: the external condenser is designed and installed in the compressor chamber to form a condensation circulation air path together with the compressor chamber and the compressor rear cover plate. A condensation fan motor is installed on one side of an external condenser in a design mode, when the refrigerator works, the condensation fan motor is turned on, air of the external environment is forced to flow into the external environment from one side of the condenser in an air suction or blowing mode, heat exchange is carried out between the condensation fan motor and the condenser, and then the air flows out from the other side of the condenser and is discharged to the external environment, so that the condensation function of the condenser is realized, and the normal work of a refrigeration system of the refrigerator is guaranteed.

As the condenser is exposed in the external environment and the forced air circulation function is added, other dirty objects such as floating dust, hair and the like which float in the external environment are inevitably adsorbed and accumulated on the condenser, and as time passes, the windward area of the condenser is gradually reduced until the condenser is completely blocked, so that the condensing capacity of the condenser is gradually weakened until the condenser cannot normally work, the refrigerating effect of the refrigerator is poor, even the refrigerator does not refrigerate, and the compressor is damaged due to the failure of the condenser in serious cases.

At present, no relevant effective means is available for detecting the filth blockage condition of an external condenser, timely judging and analyzing the filth blockage condition by using detected information, effectively protecting a compressor by taking effective measures if necessary, and reminding a user of timely cleaning the type of condenser to keep the normal and efficient operation of a refrigeration system of the refrigerator.

Therefore, it is urgently needed to improve the existing refrigerator control mode to detect and judge the dirty and blocked condition of the condenser and adjust and control related components to ensure the normal operation of the refrigerator refrigeration system.

Disclosure of Invention

The invention aims to provide a refrigerator control method, which is characterized in that real-time actual running rotating speeds of a condensing fan motor and a variable frequency compressor are compared with a preset threshold value and a maximum rotating speed limit value, and the dirty and blocked state of a condenser is obtained through the difference value between the actual rotating speed and the preset rotating speed, so that the problem that the dirty and blocked state of the existing condenser cannot be detected and obtained is solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a refrigerator control method, which comprises the following steps:

the method comprises the following steps: presetting the rated rotating speed of a condensing fan motor as Scon _ fan0, and the rated highest rotating speed of the condensing fan motor as Scon _ fan-max;

setting the first threshold value to be Δ S1, the second threshold value to be Δ S2, and Δ S2 > Δ S1;

setting a first maximum rotating speed limit value of the variable-frequency compressor as Scom1, setting a second maximum rotating speed limit value as Scom2, and setting Scom1 to be more than Scom 2;

step two: detecting the real-time actual running rotating speed of a condensing fan motor as Scon _ fan, and calculating the difference value delta S between the Scon _ fan and the Scon _ fan0, namely Scon _ fan-Scon _ fan0 is delta S;

if the delta S is larger than or equal to the delta S1, continuing to execute the step three; if not, the operation is carried out according to a normal control logic;

step three: comparing the delta S with a second threshold delta S2, and if the delta S is more than or equal to the delta S2, executing a fifth step; if not, executing the fourth step;

step four: executing a dirty and blocked program A of the condenser;

step a: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if yes, entering the step b; if not, adjusting the rotating speed of the condensing fan motor to Scon _ fan-max;

step b: detecting the real-time actual running rotating speed of the variable frequency compressor as Scom; judging whether Scom is larger than Scom1, if so, adjusting the rotating speed of the variable-frequency compressor to Scom 1; if not, continuing to operate according to the normal control logic;

step five: executing a dirty blockage program B of the condenser;

step c: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if so, entering the step d, and continuously judging the rotating speed of the variable frequency compressor; if not, adjusting the rotating speed of the condensing fan motor to the highest rotating speed Scon _ fan-max;

step d: judging whether Scom is larger than Scom2, if so, adjusting the rotating speed of the variable-frequency compressor to Scom 2; if not, the relay operates according to the normal control logic.

Further, the fifth step further comprises displaying a condenser filth blockage prompting message on a display panel of the refrigerator.

Further, step c and step d in the fifth step can be executed synchronously

Further, the condensing fan motor is positioned between the condenser and the inverter compressor.

Further, the condensing fan motor is used for driving the condensing fan to enable air to flow from the condenser side to the variable frequency compressor side.

The invention has the following beneficial effects:

according to the invention, the difference value delta S between the real-time actual operating rotating speeds Scon _ fan and Scon _ fan0 of the condensing fan motor is compared with the first threshold value delta S1 and the second threshold value delta S2, and meanwhile, the real-time actual operating rotating speed of the variable frequency compressor is compared with the first highest rotating speed limit value Scom1 and the second highest rotating speed limit value Scom2, so that the dirty and blocked degree of the condenser is judged by using the rotating speed change of the condensing fan motor, and a user is reminded to clean the condenser in time to keep the normal and efficient operation of the refrigerator refrigerating system.

Meanwhile, the rotating speed of a condensing fan motor or a variable frequency compressor is correspondingly adjusted through the obtained dirty and blocked state of the condenser, so that the normal operation of a refrigerator refrigerating system and the operation safety of the variable frequency compressor are ensured.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart of a refrigerator control method according to the present invention;

FIG. 2 is a schematic structural diagram of a condensing fan motor, an inverter compressor 2 and a condenser;

in the drawings, the components represented by the respective reference numerals are listed below:

1-a condensing fan motor, 2-a variable frequency compressor, 3-a condenser and 4-a compressor bin.

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.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1, the present invention is a refrigerator control method, including the following steps:

the method comprises the following steps: presetting the rated rotating speed of the condensing fan motor 1 as Scon _ fan0, and the rated highest rotating speed of the condensing fan motor 1 as Scon _ fan-max;

setting a first maximum rotating speed limit value of the variable-frequency compressor 2 as Scom1, setting a second maximum rotating speed limit value as Scom2, and setting Scom1 to be more than Scom 2;

step two: detecting the real-time actual running rotating speed of the condensing fan motor 1 as Scon _ fan, and calculating the difference value delta S between the Scon _ fan and the Scon _ fan0, namely Scon _ fan-Scon _ fan0 is delta S;

step four: executing a dirty and blocked program A of the condenser;

step a: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if yes, entering the step b; if not, adjusting the rotating speed of the condensing fan motor 1 to Scon _ fan-max;

step b: detecting the real-time actual running rotating speed of the variable frequency compressor 2 as Scom; judging whether Scom is larger than Scom1, if so, adjusting the rotating speed of the variable-frequency compressor 2 to Scom 1; if not, continuing to operate according to the normal control logic;

step five: executing a dirty blockage program B of the condenser;

step c: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if so, entering the step d, and continuously judging the rotating speed of the inverter compressor 2; if not, adjusting the rotating speed of the condensing fan motor 1 to the highest rotating speed Scon _ fan-max;

step d: judging whether Scom is larger than Scom2, if so, adjusting the rotating speed of the variable-frequency compressor 2 to Scom 2; if not, the relay operates according to the normal control logic. Wherein, step c and step d can be executed synchronously.

Preferably, the fifth step further comprises displaying a condenser filth blockage prompting message on a display panel of the refrigerator. The dirty and blocked prompt information of the condenser is displayed on the display panel of the refrigerator, so that a user is reminded of cleaning the condenser. The refrigerator display panel can be used for giving out an explicit prompt to remind a user of contacting with a professional of a manufacturer to clean the condenser, or the explicit prompt is directly fed back to the manufacturer through a background/cloud and other means to provide relevant services for the client in time and actively, so that the normal and efficient operation of a refrigerator refrigerating system is ensured.

As shown in fig. 2, as another preferable scheme, the condenser 3, the condensing fan motor 1 and the inverter compressor 2 are all installed in the compressor chamber 4, and the condensing fan motor 1 is located between the condenser 3 and the inverter compressor 2.

Then, the condensing fan motor 1 drives the condensing fan so that air flows from the condenser side to the inverter compressor 2 side. As the direction of arrow in the figure, the outside air flows into condenser 3 through the right side of the back shroud of compressor cavity 4 to carry out the heat exchange with condenser 3, the cold air of external environment accomplishes the heat exchange with condenser 3 after, drive the condensing fan through condensing fan motor 1, make the air discharge the external environment again by the left side of the back shroud of compressor cavity 4, the heat of condenser 3 is taken away by the cold air of external environment and is reached the condensation function, realize the normal refrigeration of refrigerator from this.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A refrigerator control method is characterized in that: the method comprises the following steps:

the method comprises the following steps: presetting the rated rotating speed of the condensing fan motor (1) as Scon _ fan0, and the rated maximum rotating speed of the condensing fan motor (1) as Scon _ fan-max;

setting a first maximum rotating speed limit value of the variable-frequency compressor (2) as Scom1, setting a second maximum rotating speed limit value as Scom2, and setting Scom1 to be more than Scom 2;

step two: detecting the real-time actual running rotating speed of the condensing fan motor (1) as Scon _ fan, and calculating the difference value delta S between the Scon _ fan and the Scon _ fan0, namely Scon _ fan-Scon _ fan0 is delta S;

step four: executing a dirty and blocked program A of the condenser;

a: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if yes, entering the step b; if not, adjusting the rotating speed of the condensing fan motor (1) to Scon _ fan-max;

b: detecting the real-time actual running rotating speed of the variable frequency compressor (2) as Scom; judging whether Scom is larger than Scom1, if so, adjusting the rotating speed of the variable-frequency compressor (2) to Scom 1; if not, continuing to operate according to the normal control logic;

step five: executing a dirty blockage program B of the condenser;

c: judging whether the Scon _ fan0 is equal to Scon _ fan-max or not, if so, entering the step d, and continuously judging the rotating speed of the variable-frequency compressor (2); if not, adjusting the rotating speed of the condensing fan motor (1) to the highest rotating speed Scon _ fan-max;

d: judging whether Scom is larger than Scom2, if so, adjusting the rotating speed of the variable-frequency compressor (2) to Scom 2; if not, the relay operates according to the normal control logic.

2. The method as claimed in claim 1, wherein the fifth step further comprises displaying a condenser filth blockage prompt message on a display panel of the refrigerator.

3. The method as claimed in claim 1, wherein the steps c and d of the step five are performed synchronously.

4. A control method of a refrigerator according to claim 1, 2 or 3, characterized in that the condensing fan motor (1) is located between the condenser and the inverter compressor (2).

5. A control method of a refrigerator according to claim 4, characterized in that the condensing fan motor (1) is used to drive the condensing fan to make air flow from the condenser side to the inverter compressor (2) side.