CN113028729B

CN113028729B - Refrigeration control method for refrigerator

Info

Publication number: CN113028729B
Application number: CN202110343239.9A
Authority: CN
Inventors: 陈俊; 汤申杰; 杨志鹏; 何伟
Original assignee: Changhong Meiling Co Ltd
Current assignee: Changhong Meiling Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-05-10
Anticipated expiration: 2041-03-30
Also published as: CN113028729A

Abstract

The invention discloses a refrigeration control method of a refrigerator, and relates to the technical field of refrigerators. The invention comprises the following steps: setting a first supercooling threshold value of the refrigerating chamber to be delta r1, a second supercooling threshold value to be delta r2 and a third supercooling threshold value to be delta r'; setting a first overheating threshold value delta f and a second overheating threshold value delta f' of the freezing chamber; step two: detecting whether the compressor is in a starting state or not, and comparing a real-time refrigerating chamber temperature value Tr _ air with Tr _ cut-delta r1 and Tr _ cut-delta r2 and a real-time freezing chamber temperature value Tf _ air with Tf _ cut out + delta f in the starting state; when the compressor is stopped, comparing Tr _ air with Tr _ cut out-delta r 'and Tf _ air with Tf _ cut in + delta f' in the third step to determine the main and auxiliary sequence of the control of the compressor. According to the invention, the multivariable parallel control of the compressor is adjusted to the control of the refrigerating chamber as a main control mode and the control of the freezing chamber as an auxiliary control mode by setting the first supercooling threshold value delta r1, the second supercooling threshold value delta r2 and the third supercooling threshold value delta r' of the refrigerating chamber, so that the problems of excessive refrigeration and frozen food of the existing refrigerating chamber are solved.

Description

Refrigeration control method for refrigerator

Technical Field

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

Background

At present, the control method of the compressor of the refrigerator-freezer generally comprises the following steps: when any compartment of the refrigerating chamber or the freezing chamber has a refrigerating requirement, the compressor is started, and the refrigerating system starts to work to provide refrigerating capacity. When the refrigeration requirements of the refrigerating chamber and the freezing chamber are met, namely the temperature of the stop point, the compressor is closed, and the refrigeration system stops working.

Because the shutdown condition of the compressor involves two or more variables of the refrigerating temperature and the freezing temperature, and it is difficult to make a plurality of variables simultaneously meet the preset condition at the same time, measures such as distributing the refrigerating capacity by using an air door switch or refrigerating different chambers by using a solenoid valve switching transformation are generally adopted to balance the requirements of the chambers.

However, in the practical application process, the air door or the electromagnetic valve is often out of work, so that the refrigerating chamber is not controlled in refrigeration, the refrigeration is excessive, and the food is frozen.

Therefore, the existing refrigeration control mode needs to be improved, and the control strategy of the compressor is adjusted to ensure that the phenomenon that the refrigerating chamber is excessively refrigerated and foods are frozen is avoided on the premise that the refrigerating chamber is normally refrigerated.

Disclosure of Invention

The invention aims to provide a refrigeration control method of a refrigerator, which realizes the adjustment of a control strategy of a compressor by setting a first supercooling threshold value delta r1, a second supercooling threshold value delta r2 and a third supercooling threshold value delta r' of a refrigerating chamber, adjusts the control of the compressor from refrigeration and freezing multivariable parallel control to the control of the refrigerating chamber as a main control, and controls a freezing chamber as an auxiliary control, thereby solving the problems that the existing refrigerating chamber is easy to refrigerate excessively and freeze food.

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

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

the method comprises the following steps: setting parameters; setting the starting temperature of the refrigerating chamber to be Tr _ cut in and the stopping temperature of the refrigerating chamber to be Tr _ cut out; the starting temperature of the freezing chamber is Tf _ cut in, and the stopping temperature of the freezing chamber is Tf _ cut out;

setting a first supercooling threshold value of the refrigerating chamber to be delta r1, a second supercooling threshold value to be delta r2 and a third supercooling threshold value to be delta r'; wherein, the delta r2 is more than delta r1 is more than 0, and the delta r' is more than 0;

setting a first overheating threshold value of the freezing chamber to be delta f, setting a second overheating threshold value to be delta f ', wherein the delta f is more than 0, and the delta f' is more than 0;

step two: detecting whether the compressor is in a starting state, if so, executing a step S2.1; if not, executing the third step;

s2.1: maintaining the starting state of the compressor and executing the step S2.2;

s2.2: collecting a real-time temperature value Tf _ air of the freezing chamber, judging whether Tf _ air is less than or equal to Tf _ cut out, and if yes, entering a step S2.3; if not, the step S2.4 is carried out;

s2.3: collecting real-time temperature value Tr _ air of the refrigerating chamber, judging whether Tr _ air is less than or equal to Tr _ cut out, if yes, stopping the compressor, and returning to the second step; if not, returning to the step S2.1;

s2.4: judging whether Tr _ air is less than or equal to (Tr _ cut out-delta r1) or not, and if yes, entering step S2.5; if not, returning to the step S2.1;

s2.5: judging whether Tf _ air is less than or equal to (Tf _ cut out + delta f) or not, if yes, stopping the compressor, and returning to the step two; if not, the step S2.6 is carried out;

s2.6: judging whether Tr _ air is less than or equal to (Tr _ cut out-delta r2) or not, if so, stopping the compressor, and returning to the step two; if not, returning to the step S2.1;

step three: maintaining the compressor shutdown state, and executing the step S3.1;

s3.1: collecting real-time temperature value Tr _ air of the refrigerating chamber, judging whether Tr _ air is greater than or equal to Tr _ cut in, if yes, starting the compressor, and returning to the second step; if not, the step S3.2 is carried out;

s3.2: collecting a real-time temperature value Tf _ air of the freezing chamber, judging whether Tf _ air is larger than or equal to Tf _ cut in or not, and if yes, entering step S3.3; if not, returning to the third step;

s3.3: judging whether Tr _ air is greater than or equal to (Tr _ cut out-delta r') or not, if yes, starting the compressor, and returning to the step two; if not, the step S3.4 is carried out;

s3.4: judging whether Tf _ air is greater than or equal to (Tf _ cut in + delta f'), if yes, starting the compressor, and returning to the second step; if not, returning to the step three.

Further, the compressor is an inverter compressor.

Further, in step S2.6, before returning to step S2.1, the compressor rotation speed is adjusted to the maximum.

The invention has the following beneficial effects:

according to the invention, the first supercooling threshold value of the refrigerating chamber is set to be delta r1, the second supercooling threshold value is set to be delta r2 and the third supercooling threshold value is set to be delta r', when a refrigerating chamber sensor detects that the temperature is lower than a preset shutdown point and reaches a certain supercooling threshold value, the temperature of the refrigerating chamber is judged to be controlled to have a fault, namely the refrigerating chamber has a supercooling risk.

Therefore, the control strategy of the compressor is adjusted in time, and the control of the compressor is adjusted to a control mode that the refrigeration chamber control is taken as the main control and the freezing chamber control is taken as the auxiliary control by multivariable parallel control of refrigeration and freezing. On the premise of effectively ensuring normal refrigeration of the freezing chamber, the phenomenon that the refrigerating chamber is excessively refrigerated and foods are frozen is effectively avoided.

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 refrigeration control method for a refrigerator according to 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, the present invention is a method for controlling refrigeration of a refrigerator, including the following steps:

setting a first supercooling threshold value of the refrigerating chamber to be delta r1, a second supercooling threshold value to be delta r2 and a third supercooling threshold value to be delta r'; wherein, the delta r2 is more than delta r1 is more than 0, and the delta r' > 0. For example, Δ r1 ═ 0.5 ℃, Δ r2 ═ 1.5 ℃, Δ r' ═ 1 ℃.

Setting the first overheating threshold value of the freezing chamber to be delta f, setting the second overheating threshold value to be delta f ', wherein delta f is larger than 0, and delta f' is larger than 0. For example, Δ f ═ 2 ℃ and Δ f ═ 1 ℃.

s2.2: collecting a real-time temperature value Tf _ air detected by a sensor in the refrigerating chamber, judging whether Tf _ air is equal to or less than Tf _ cut out, and if yes, entering a step S2.3; if not, the step S2.4 is carried out;

s2.3: collecting a real-time temperature value Tr _ air detected by a sensor in the refrigerating chamber, judging whether Tr _ air is less than or equal to Tr _ cut out, if so, stopping the compressor, and returning to the second step; if not, returning to the step S2.1;

s2.5: judging whether Tf _ air is less than or equal to (Tf _ cut out + delta f) or not, if yes, stopping the compressor, and returning to the step two; if not, the process goes to step S2.6.

S2.6: judging whether Tr _ air is less than or equal to (Tr _ cut out-delta r2) or not, if so, stopping the compressor, and returning to the step two; if not, the procedure returns to step S2.1. And if the compressor is the variable frequency compressor, controlling the rotation speed of the compressor to be adjusted to the maximum, and then returning to the step S2.1.

s3.1: collecting a real-time temperature value Tr _ air detected by a sensor in the refrigerating chamber, judging whether Tr _ air is greater than or equal to Tr _ cut in or not, if yes, starting the compressor, and returning to the step two; if not, the step S3.2 is carried out;

s3.2: collecting a real-time temperature value Tf _ air detected by a sensor in the freezing chamber, judging whether Tf _ air is greater than or equal to Tf _ cut in, and if yes, entering step S3.3; if not, returning to the third step;

In the time period of refrigerator operation, the real-time temperature Tr _ air detected by a refrigerating chamber sensor and the real-time temperature Tf _ air detected by a freezing chamber sensor are periodically collected, and the current operation condition of the refrigerator is comprehensively judged according to the set parameters of the refrigerating chamber starting temperature Tr _ cut in, the refrigerating chamber stopping temperature Tr _ cut out, the freezing chamber starting temperature Tf _ cut in, the freezing chamber stopping temperature Tf _ cut out and the like, so that the starting and stopping of the compressor are controlled.

Meanwhile, if the compressor is an inverter compressor, the compressor can be further responded by controlling the rotation speed change of the inverter compressor. In steps S2.1 to S2.6 and steps S3.1 to S3.4, the rotation speed of the compressor is increased and set to be controlled, so as to realize flexible control and adjustment of the temperature of the refrigerator compartment.

And in the starting stage of the compressor, comparing the temperature detected by the indoor sensor acquired in real time with the preset stop point temperature in the control logic, and if the real-time temperature Tr _ air detected by the refrigerating chamber sensor is lower than the refrigerating stop point temperature Tr _ cut out, which indicates that the temperature of the refrigerating chamber is possibly not controlled, adjusting the control strategy of the compressor to a control mode that the refrigerating chamber is controlled as a main mode and the freezing chamber is controlled as an auxiliary mode by refrigerating and freezing multivariable parallel control.

And, set up the first supercooling threshold value Δ r1 of the chill chamber, make under the safe prerequisite of the refrigerated temperature in order to guarantee the basic refrigerating capacity of the freezer, when the temperature Tr _ air that the sensor of the chill chamber detects drops further and triggers the second supercooling threshold value Δ r2, the compressor is handed over to the chill chamber to control, avoid appearing the supercooling in the chill chamber, the condition of freezing out food appears.

When the compressor is in a shutdown stage, the temperature detected by the indoor sensor collected in real time is compared with the temperature of a starting point preset in the control logic, when the freezing chamber has a refrigeration request, whether the real-time temperature Tr _ air detected by the refrigerating chamber sensor is too low is judged, and if yes, the temperature Tr _ air detected by the refrigerating chamber sensor is waited to rise back to a normal level.

Meanwhile, in order to ensure the basic refrigerating capacity of the freezing chamber, a second overheating threshold value delta f 'is set for freezing, and when the second overheating threshold value delta f' is triggered, the compressor is controlled by the freezing chamber, so that the condition that the temperature of the freezing chamber is too high is avoided.

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 refrigeration control method of a refrigerator is characterized in that: the method comprises the following steps:

setting a first supercooling threshold value of the refrigerating chamber to be delta r1, a second supercooling threshold value of the refrigerating chamber to be delta r2 and a third supercooling threshold value of the refrigerating chamber to be delta r'; wherein, delta r2 is more than delta r1 is more than 0, and delta r' is more than 0;

s3.4: judging whether Tf _ air is greater than or equal to (Tf _ cut in + delta f'), if yes, starting the compressor, and returning to the second step; if not, returning to the third step.

2. The refrigeration control method of claim 1, wherein the compressor is an inverter compressor.

3. A refrigeration control method for a refrigerator according to claim 2, wherein in step S2.6, before returning to step S2.1, the compressor rotation speed is adjusted to the maximum.