CN103471341A - A refrigerator compartment overcooling fault detection system and detection method - Google Patents

Abstract

The invention discloses a system and a method for detecting supercooling faults of refrigerator compartments, which are characterized by comprising the following steps: the detection system comprises a temperature sensor unit, a control unit and a display unit; the temperature sensor unit is arranged in the refrigerator chamber and used for detecting the temperature of the refrigerator chamber; the control unit is used for acquiring the temperature of the refrigerator compartment measured by the temperature sensor in real time and transmitting a fault signal to the display unit; the display unit is arranged on the outer surface of the refrigerator and used for displaying fault signals. The invention can accurately detect the supercooling fault of the refrigerator compartment, has simple method, can quickly remind a user once the supercooling fault occurs, and effectively avoids the problem of food freezing damage caused by the fact that the temperature of the refrigerator compartment is seriously lower than the designed temperature range.

Description

A refrigerator compartment overcooling fault detection system and detection method

technical field

The invention relates to a detection system and a detection method for an overcooling fault in a refrigerator compartment.

Background technique

Overcooling of the refrigerator compartment means that the temperature of the refrigerator deviates from the design temperature range of the compartment, for example, the design range of the refrigerator compartment temperature is 2-8°C. During the use of the refrigerator, if the average temperature of the refrigerator is lower than 0°C, it can be considered that the refrigerator is too cold. Faults of overcooling in refrigerator compartments occur from time to time. Once a fault occurs, the user cannot find it immediately, which will cause food such as vegetables and fruits to be frozen. Generally, electric control refrigerators are equipped with temperature sensors in each room to control the temperature of the room. Multi-chamber direct-cooling refrigerators generally control the temperature by switching solenoid valves in conjunction with the start and stop of the compressor; multi-chamber air-cooled refrigerators with a single evaporator control the temperature of the compartments by opening and closing the damper in conjunction with the start and stop of the compressor . Once the solenoid valve and damper fail to switch or close, the design temperature of the corresponding compartment will be low. Especially for refrigerators, if the temperature is lower than 0°C, vegetables and fruits will be damaged by freezing.

Contents of the invention

In order to solve the shortcomings of the above-mentioned prior art, the present invention provides a detection system and detection method for the overcooling failure of the refrigerator compartment by means of the existing sensor for controlling the temperature of the compartment in the electronically controlled refrigerator, in order to be able to The overcooling failure of the refrigerator is detected in time and the user is notified.

The present invention solves technical problem and adopts following technical scheme:

The feature of the refrigerator compartment overcooling fault detection system of the present invention is that the detection system includes a temperature sensor unit, a control unit and a display unit;

The temperature sensor unit is arranged in the refrigerator compartment for detecting and controlling the temperature of the refrigerator compartment;

The control unit is used to collect the refrigerator compartment temperature measured by the temperature sensor in real time, and transmit a fault signal to the display unit;

The display unit is arranged on the outer surface of the refrigerator for displaying fault signals.

The feature of the refrigerator compartment overcooling fault detection system of the present invention is also that: the control unit is provided with a temperature limit value. , the control unit transmits a fault signal to the display unit;

T is 1-30min.

The temperature limit is 1-10°C lower than the shutdown point temperature of the compartment.

The detection method of refrigerator compartment overcooling fault of the present invention is to carry out according to the following steps:

a. Turn on the power supply of the refrigerator, and the detection system starts to work;

b. The temperature sensor unit tests the temperature of the refrigerator compartment, and transmits the measured temperature of the refrigerator compartment to the control unit;

c. The control unit collects the temperature of the refrigerator compartment transmitted by the temperature sensor in real time, and a temperature limit value is set on the control unit. When the collected refrigerator compartment temperature is continuously lower than the temperature limit value, the time is not less When T, the control unit transmits a fault signal to the display unit;

d. The display unit displays a fault signal.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. The overcooling fault detection system of the present invention detects the temperature of the refrigerator compartment through the temperature sensor unit, and then collects the temperature of the refrigerator compartment in real time through the control unit and compares it with the temperature limit value to determine whether there is an overcooling fault in the refrigerator compartment. When a cold fault occurs, a fault signal is sent to the display unit, and the display unit displays the fault signal to remind the user. The method is simple, fast and efficient, and effectively avoids the problem that the temperature of the refrigerator compartment is seriously lower than the design temperature range, resulting in food freezing;

2. In the present invention, the fault signal is sent only when the temperature of the refrigerator compartment collected by the control unit continues to be lower than the temperature limit value for a time not less than T, which improves the detection accuracy.

Description of drawings

FIG. 1 is a schematic structural diagram of a refrigerator compartment overcooling fault detection system of the present invention.

Detailed ways:

In this embodiment, the refrigerator compartment overcooling fault detection system includes a temperature sensor unit, a control unit and a display unit;

The temperature sensor unit is arranged in the refrigerator compartment for testing the temperature of the refrigerator compartment;

The control unit is used to collect the temperature of the refrigerator compartment measured by the temperature sensor in real time, and transmit a fault signal to the display unit; during specific implementation, the control unit can be integrated with the refrigerator controller.

The display unit is arranged on the outer surface of the refrigerator and is used for displaying fault signals. During specific implementation, the display unit is integrated with the display system of the refrigerator.

When the temperature limit value is set in the control unit, when the temperature of the refrigerator compartment collected by the control unit continues to be lower than the temperature limit value for a time not less than T, the control unit sends a fault signal to the display unit; T can be in the range of 1～ In the range of 30 minutes, the optimal value of 5 minutes is adopted in this embodiment, and the temperature limit value of this embodiment is -10°C.

Using the detection method of the refrigerator compartment supercooling fault detection system of this embodiment, proceed as follows:

a. Turn on the power of the refrigerator, and the detection system starts to work;

b. The temperature sensor unit tests the temperature of the refrigerator compartment, and transmits the measured temperature of the refrigerator compartment to the control unit;

c. The control unit collects the refrigerator compartment temperature transmitted by the temperature sensor in real time, and when the collected refrigerator compartment temperature is continuously lower than -10°C for 5 minutes, the control unit transmits a fault signal to the display unit;

d. The display unit displays the fault signal.

The overcooling fault detection system of the present invention detects the temperature of the refrigerator compartment through the temperature sensor unit, and then collects the temperature of the refrigerator compartment in real time through the control unit and compares it with the temperature limit value to determine whether there is an overcooling fault in the refrigerator compartment. When a fault occurs, the fault signal is sent to the display unit, and the display unit displays the fault signal to remind the user. It does not need manual detection. The method is simple, fast and efficient, and avoids the temperature of the refrigerator compartment being seriously lower than the design temperature range, resulting in food freezing. question.

Claims (5)

1. a refrigerator compartment is crossed the cold fault detection system, it is characterized in that: described detection system comprises temperature sensor unit, control module and display unit;

Described temperature sensor unit is arranged in refrigerator compartment, for testing the refrigerator compartment temperature;

Described control module is used for the measured refrigerator compartment temperature of the described temperature sensor of Real-time Collection, and transmits fault-signal to described display unit;

Described display unit is arranged at the fridge exterior face, for showing fault-signal.

2. refrigerator compartment according to claim 1 is crossed the cold fault detection system, it is characterized in that: at described control module, be provided with the temperature limit value, when the lasting time lower than described temperature limit value of refrigerator compartment temperature that control module collects is not less than T, control module transmits fault-signal to described display unit.

3. refrigerator compartment according to claim 2 is crossed the cold fault detection system, it is characterized in that: T is 1～30min.

4. refrigerator compartment according to claim 2 is crossed the cold fault detection system, it is characterized in that: described temperature limit value is lower than described chamber break point temperature 1-10 ℃.

5. a detection method of utilizing claim 2 or 3 or 4 described refrigerator compartments to cross cold fault is characterized in that: carry out as follows:

A, connection refrigerator power supply, described detection system is started working;

B, described temperature sensor unit inspection refrigerator compartment temperature, and measured refrigerator compartment temperature is sent to described control module;

The refrigerator compartment temperature that c, the described temperature sensor of described control module Real-time Collection transmit, be provided with the temperature limit value at described control module, when the lasting time lower than described temperature limit value of the refrigerator compartment temperature collected is not less than T, control module transmits fault-signal to described display unit;

D, described display unit show fault-signal.

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