CN115077236A

CN115077236A - Refrigerator cooling fan detecting system

Info

Publication number: CN115077236A
Application number: CN202210774032.1A
Authority: CN
Inventors: 陆涛; 陈宇; 程春明
Original assignee: Changhong Meiling Co Ltd
Current assignee: Changhong Meiling Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-09-20

Abstract

The invention provides a refrigerator cooling fan detection system, comprising: main control board, cooling fan, interior fan, refrigeration piece, rotational speed detection module and box, wherein: the main control board sets up on the box, and cooling fan, interior fan, refrigeration piece and rotational speed detection module all set up in the box. The cooling fan, the inner fan, the refrigerating piece and the rotating speed detection module are all electrically connected with the main control board, and the rotating speed detection module is further connected with the cooling fan. The master control board is configured to: generating a starting instruction for starting the cooling fan, the inner fan, the refrigerating sheet and the rotating speed detection module; and receiving a rotating speed signal fed back by the rotating speed detection module, and if the rotating speed is lower than a preset rotating speed threshold value, closing the heat dissipation fan, the inner fan and the refrigerating sheet. Through detecting the rotating speed of the cooling fan, the cooling fan can be ensured to normally operate when the refrigeration sheet works. Therefore, the heat dissipation of the refrigerating sheet is accelerated, the problem that the refrigerating sheet is damaged due to overhigh temperature is solved, and the working efficiency and the safety of the refrigerator are improved.

Description

Refrigerator cooling fan detecting system

Technical Field

The application relates to the technical field of refrigeration, in particular to a refrigerator cooling fan detection system.

Background

With the development of the times, refrigerators have become essential household appliances in every home. As different users have different requirements for refrigerators, the variety of refrigerators is more and more abundant, and one of the more novel variety of refrigerators is a semiconductor refrigerator. The semiconductor refrigerator adopts a semiconductor refrigeration sheet mode to refrigerate, does not need a refrigerant, and is very environment-friendly. The refrigeration pill includes many different specifications so that the semiconductor refrigerator can be made in any size.

Since large-sized refrigerators have become widespread, most of the semiconductor refrigerators are small-sized refrigerators. The small-size refrigerator occupies small space and is convenient to use, can be placed at any corner of a home or a car, and is loved by most users. However, the cooling fins on the refrigerating fins can emit a large amount of heat in the working process, and if the heat is not dissipated in time, the temperature is possibly too high, so that the faults of the refrigerating fins are caused.

In order to ensure that the refrigerating sheet can work normally, a fan is arranged in most refrigerators to radiate heat of radiating fins on the refrigerating sheet, but the fan can also break down in work. Once the fault of the fan cannot be found in time, the heat of the radiating fins cannot be discharged in time, the fault of the refrigerating fins can still be caused, and the working efficiency of the refrigerator is low.

Disclosure of Invention

The application provides a refrigerator cooling fan detection system to solve the problem that the work efficiency of a refrigerator is low.

The application provides refrigerator cooling fan detecting system includes: main control board, cooling fan, interior fan, refrigeration piece, rotational speed detection module and box, wherein:

the main control board set up in on the box, radiator fan, interior fan, the refrigeration piece with rotational speed detection module all set up in the box. The cooling fan is electrically connected with the main control board, the inner fan is electrically connected with the main control board, the refrigerating piece is electrically connected with the main control board, and the refrigerating piece is a semiconductor refrigerating piece. The rotation speed detection module is connected with the cooling fan, and the rotation speed detection module is configured to detect the rotation speed of the cooling fan. The rotating speed detection module is electrically connected with the main control board so as to feed back a rotating speed signal of the cooling fan to the main control board.

The master control board is configured to: generating a starting instruction, wherein the starting instruction is used for starting the heat radiation fan, the inner fan, the refrigeration sheet and the rotating speed detection module; receiving a rotating speed signal fed back by the rotating speed detection module; and if the rotating speed is lower than a preset rotating speed threshold value, the heat radiation fan, the inner fan and the refrigerating sheet are closed. When the rotating speed of the cooling fan is abnormal, the cooling fan, the inner fan and the refrigeration piece can be closed in time, and the situation that the heat of the refrigeration piece cannot be dissipated in time and is prevented from breaking down is avoided.

Optionally, the refrigeration piece includes a heat sink, a temperature sensor is disposed on the heat sink, and the temperature sensor is used for detecting the temperature of the heat sink; the temperature sensor is electrically connected with the main control board, and the main control board is configured to: receiving a heat dissipation temperature signal of the heat dissipation plate; and if the heat dissipation temperature is higher than the preset heat dissipation temperature threshold value, the heat dissipation fan, the inner fan and the refrigerating sheet are closed. Through detecting the temperature of the cooling fin, the situation that the cooling fin still has heat dissipation abnormality under the condition that the rotating speed of the cooling fan is normal can be found in time.

Optionally, in the step of generating the start instruction, the main control board is configured to: and generating a starting instruction, wherein the starting sequence instruction is used for starting the heat radiation fan, and after a preset time period, starting the inner fan, the refrigerating sheet and the rotating speed detection module. The cooling fan is started for a period of time, so that the cooling fan forms an environment with air flowing, and then the inner fan, the refrigerating sheet and the rotating speed detection module are started. The refrigerating sheet can be ensured to be in an air flowing environment after being started, and the situation that heat dissipation is not timely is prevented.

Optionally, in the step of turning off the cooling fan, the inner fan and the cooling fins, the main control board is configured to: closing the inner fan and the refrigerating sheet; and after a preset time period, closing the heat radiation fan. After the inner fan and the refrigerating sheet are closed, the heat dissipation fan is enabled to operate for a period of time and then closed, and heat generated by the refrigerating sheet can be fully dissipated to ensure heat dissipation efficiency.

Optionally, a door body is arranged on the box body, a hall sensor and a magnet are arranged between the door body and the box body, the hall sensor is used for detecting the opening and closing state of the door body, the hall sensor is electrically connected with the main control board, and after the main control board is opened, the heat dissipation fan, the inner fan, the refrigeration piece and the rotating speed detection module, the main control board is configured to: when the door body is in an open state, the refrigerating sheet and the inner fan are closed; and when the door body is in a closed state, the refrigerating sheet and the inner fan are started. When the door body is in an open state, the cold energy of the refrigerator can leak out, and at the moment, part of the cold energy produced by the refrigerating sheet can be wasted. Therefore, when the door body is in an open state, the refrigerating sheet and the inner fan are closed, so that the leakage of cold energy can be reduced, and the electricity consumption is saved.

Optionally, an illuminating lamp is further disposed in the box body, and the main control board is configured to: when the door body is in an open state, the illuminating lamp is turned on; and when the door body is in a closed state, the illuminating lamp is turned off. When a user opens the door body to take articles, the illuminating lamp is turned on, so that a clearer visual field can be provided for the user.

Optionally, a distance sensor is arranged on the door body, and the distance sensor is used for acquiring the distance between the box body and a user; the distance sensor with the master control board electricity is connected, is opening behind master control board, cooling fan, interior fan, refrigeration piece and the rotational speed detection module, the master control board is configured to:

if the distance is smaller than a preset distance threshold value, adjusting the rotating speed of the inner fan to a preset first rotating speed value; and if the distance is greater than or equal to a preset distance threshold value, adjusting the rotating speed of the inner fan to a preset second rotating speed value, wherein the second rotating speed value is greater than the first rotating speed value. When a user approaches the door body, the rotating speed of the inner fan is adjusted to be low, and noise generated by the inner fan is reduced.

Optionally, a refrigerating chamber is arranged in the box body, a temperature sensor is arranged in the refrigerating chamber, and the temperature sensor is used for detecting the refrigerating temperature of the refrigerating chamber; the temperature sensor is electrically connected with the main control board, and the main control board is configured to: and if the refrigerating temperature is lower than a preset refrigerating temperature threshold value, the inner fan and the refrigerating sheet are closed. And stopping refrigerating after the refrigerating temperature of the refrigerating chamber reaches the requirement, wherein the refrigerating temperature of the refrigerating chamber can be maintained for a period of time. After the refrigerating temperature rises, the refrigerating work is started again. When the refrigerating temperature of the refrigerating chamber reaches the requirement, the inner fan and the refrigerating sheet are closed, so that the electricity can be saved.

Optionally, an alarm module is further disposed in the main control board, and the main control board is configured to: and if the rotating speed is lower than a preset rotating speed threshold value, alarm information is generated through the alarm module. And if the rotating speed is lower than a preset rotating speed threshold value, the fact that the cooling fan is abnormal is proved. The alarm module generates alarm information about the abnormal condition, so that a user can be reminded in time.

Optionally, a communication module is further disposed in the main control board, and the main control board is configured to: if the rotating speed is lower than the preset rotating speed threshold value, the alarm information is sent to the client through the communication module, and the alarm information can be sent to other equipment in time for reminding.

According to the technical scheme, the refrigerator cooling fan detection system is provided, through on the box main control board control cooling fan interior fan the refrigeration piece with opening of rotational speed detection module stops. After the cooling fan, the inner fan, the refrigerating sheet and the rotating speed detection module start to operate, the rotating speed detection module detects the rotating speed of the cooling fan and feeds a rotating speed signal back to the main control board. Because when cooling fan broke down, the heat in the box can not in time spill out, can lead to the high temperature, causes the refrigeration piece damages. Therefore, when the main control board judges that the rotating speed is lower than the preset rotating speed threshold value, the main control board proves that the heat-radiating fan breaks down, and then the heat-radiating fan, the inner fan and the refrigerating sheet are closed, so that the damage of the refrigerating sheet is relieved, and the safety and the working efficiency of the refrigerator are improved.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic flow chart of a control of a refrigerator cooling fan detection system;

FIG. 2 is a schematic diagram of the internal structure of the case in the embodiment of the present application;

FIG. 3 is a schematic external view of the case according to the embodiment of the present application;

FIG. 4 is a schematic diagram of an external structure of a case with a distance sensor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a main control board in the embodiment of the present application.

Illustration of the drawings:

the intelligent control system comprises a main control board 100, an alarm module 101, a communication module 102, a cooling fan 200, an internal fan 300, a refrigerating sheet 400, a cooling fin 401, a temperature sensor 402, a rotating speed detection module 500, a box body 600, a door body 601, a Hall sensor 602, a magnet 603, an illuminating lamp 604, a distance sensor 605 and a refrigerating chamber 606.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.

Semiconductor refrigerators, also known as electronic refrigerators, are known as thermoelectric or thermoelectric refrigerators. Semiconductor refrigeration is different in refrigeration principle from a refrigerator that generally refrigerates by a refrigerant. The semiconductor refrigeration technology utilizes a semiconductor refrigeration sheet, an efficient annular two-layer heat pipe heat dissipation and conduction technology and a full-automatic variable-voltage variable-flow control system to complete refrigeration. The semiconductor refrigeration does not need refrigeration medium and mechanical motion components, thereby relieving the application problems which cannot be treated by mechanical refrigeration refrigerators such as medium pollution, mechanical vibration and the like, and having more obvious environmental protection and energy saving characteristics on the aspect of low-temperature refrigerators with small volumes.

However, one end of the semiconductor refrigerating sheet can emit a large amount of heat in the refrigerating process, and if the heat is not emitted in time, the overall temperature of the semiconductor refrigerating sheet is too high, so that the refrigerating sheet is damaged. In order to accelerate the heat dissipation of the cooling fins, a fan is usually used to dissipate the heat of the cooling fins. However, the fan may also be jammed during operation, which may cause the heat at the heat dissipation end of the cooling fins not to be dissipated in time, and damage to the cooling fins.

In order to solve the above problem, referring to fig. 1, the present application provides a refrigerator cooling fan detection system, including: the main control board 100, the cooling fan 200, the inner fan 300, the refrigeration sheet 400, the rotating speed detection module 500 and the box body 600. The main control board 100 is disposed on the box body 600, and the cooling fan 200, the inner fan 300, the cooling fins 400, and the rotation speed detection module 500 are disposed in the box body 600.

The main control board 100 is a core control element in the whole system, and the main control board 100 includes both a control circuit and a receiving circuit, so that the main control board 100 can receive a set instruction through the receiving circuit and control each element in the box 600 through the control circuit.

The refrigerating plate 400 is a semiconductor refrigerating plate, which is also called a thermoelectric refrigerating plate, and is a heat pump. Its advantages are no slide part, and high reliability. By utilizing the Peltier effect of semiconductor materials, when direct current passes through a galvanic couple formed by connecting two different semiconductor materials in series, heat can be absorbed and released at two ends of the galvanic couple respectively, and the aim of refrigeration is fulfilled.

In some embodiments, the cooling fins 400 are provided with heat dissipation fins 401 and heat dissipation fins made of aluminum at two ends, and the heat dissipation fins 401 are of a fin structure and form a heat dissipation block. The aluminum block has good heat conduction efficiency, and the fin structure can increase the surface area contacted with air, so that the refrigeration and heat dissipation of the refrigeration piece 400 can be accelerated.

The radiator fan 200 is provided at an end where the cooling fin 400 radiates heat, i.e., a fin 401 end. The heat dissipation fan 200 sucks external air in the air inlet, and discharges the air through the air outlet. In the flowing process of air from the air inlet to the air outlet, the heat dissipated by the heat sink 401 is dissipated from the box body 600 along with the flowing of the air, thereby accelerating the dissipation of the heat in the refrigerator. The heat dissipation fan 200 may be an axial flow fan, and the axial flow fan may be directly disposed on the cooling fins 400 to facilitate the modular structural arrangement of the refrigerator.

The inner fan 300 is a fan for dissipating cold in the case 600, and the inner fan 300 is disposed at one end of the cooling fin 400 that absorbs heat, i.e., a cooling end. After the cooling fins 400 absorb heat, the ambient temperature will decrease, and the inner fan 300 blows the cool air around the cooling end of the cooling fins 400 to circulate the cool air, so as to achieve the purpose of cooling.

The rotation speed detection module 500 is used for detecting the rotation speed of the cooling fan 200 in the working process in real time. The rotation speed detection module 500 may adopt a tachometer, and the tachometer is connected with the cooling fan 200, so that the rotation speed of the cooling fan 200 can be detected; or the rotation speed detection module 500 may adopt a rotation speed detection circuit arranged inside the heat dissipation fan 200, so that the heat dissipation fan 200 can directly feed back the rotation speed by itself.

The cooling fan 200, the inner fan 300 and the refrigerating sheet 400 are electrically connected to the main control board 100, so that the main control board 100 can control the starting and stopping of the cooling fan 200, the inner fan 300 and the refrigerating sheet 400. The rotation speed detection module 500 is connected to the cooling fan 200. The rotation speed detection module 500 is also electrically connected to the main control board 100 to transmit the rotation speed signal detected by the rotation speed detection module to the main control board 100. The main control board 100 is configured to: and generating a starting instruction.

The start instruction is used for starting the cooling fan 200, the inner fan 300, the refrigerating fins 400 and the rotation speed detection module 500. According to the starting instruction, the main control board 100, the heat radiation fan 200, the inner fan 300, the refrigeration sheet 400 and the rotating speed detection module 500 all start to operate. The heat sink 401 may release a large amount of heat when the cooling fin 400 operates. In this process, the heat dissipation fan 200 continuously sucks and discharges air, and the heat dissipation speed is increased by the air circulation.

Similarly, when the cooling fan 200, the inner fan 300, the cooling fins 400 and the rotation speed detection module 500 need to be turned off, the main control board 100 may further generate a turn-off instruction, and send the turn-off instruction to each unit, and each unit may stop operating or cut off the power supply after receiving the turn-off instruction, and exit from the operating state.

In some embodiments, the main control board 100 is configured to: the cooling fan 200 is first turned on, and after a preset time period, the inner fan 300, the refrigerating fins 400 and the rotation speed detection module 500 are then turned on. If the cooling fan 200, the inner fan 300, the cooling fins 400 and the rotation speed detection module 500 are simultaneously started, the cooling speed of the cooling fins 401 is high, and the cooling fan 200 may not immediately circulate air due to just being started, so that the cooling is not timely. Therefore, it is necessary to start the cooling fan 200 for a certain period of time, and then start other components after the air is circulated at the end of the cooling fin 401. For example: the cooling fan 200 is started first, and after 15 seconds, the inner fan 300, the refrigerating fins 400 and the rotating speed detection module 500 are started.

In some embodiments, the main control board 100, when controlling to turn off each element, is further configured to: and closing the inner fan 300 and the refrigerating sheet 400, and closing the heat radiation fan 200 after a preset time period. After the cooling plate 400 is closed, residual heat which is not dissipated may still exist on the cooling fin 401, and at this time, the cooling fan 200 is closed after continuously operating for a period of time, so that dissipation of the residual heat of the cooling fin 401 can be accelerated. For example: the inner fan 300 and the refrigerating sheet 400 are closed first, and after 15s, the cooling fan 200 is closed.

The speed of the cooling fan 200 during operation is constant, and in practical applications, the theoretical speed of the cooling fan 200 during operation can be determined according to the rated power of the cooling fan 200. If the cooling fan 200 has a fault, for example: the cooling fan 200 is stuck, and the rotation speed is 0 at this time; or the cooling fan 200 may be damaged by the internal circuit and the speed is lower than the rotation speed in normal operation. Once the cooling fan 200 has the above fault, the rotation speed of the cooling fan 200 is reduced, and the cooling efficiency of the cooling fin 401 is reduced, so that the temperature is too high, and the refrigeration fin 400 is damaged. To avoid this, the main control board 100 is configured to: receiving a rotation speed signal fed back by the rotation speed detection module 500; if the rotating speed is lower than the preset rotating speed threshold value, the heat radiation fan 200, the inner fan 300 and the refrigerating sheet 400 are closed. Therefore, when the cooling fan 200 fails, the inner fan 300, the refrigerating fins 400 and the cooling fan 200 can be closed in time, and the refrigerating fins 400 are prevented from being damaged. The rotation speed threshold is set according to the rotation speed of the cooling fan 200 during normal operation, and the rotation speed threshold can be lower than the rotation speed during normal operation. For example, during operation, the rotation speed of the cooling fan 200 may be slightly reduced due to unstable voltage, but the overall cooling is not affected, and some slight changes in the rotation speed may be ignored.

For example: the rated speed of the cooling fan 200 is 1800 rpm, and the normal operating speed is the same as the rated speed. Under the influence of some environmental factors, the rotation speed of the cooling fan 200 may be within the range of 1740-. The rotation speed threshold is set to 1740 rpm, and the main control board 100 immediately turns off the inner blower 300, the cooling fins 400, and the heat dissipation blower 200 when the rotation speed is lower than 1740 rpm.

In some embodiments, referring to fig. 5, an alarm module 101 is further disposed in the main control board 100. If the rotation speed of the cooling fan 200 is lower than the preset rotation speed threshold, the main control board 100 is configured to: alarm information is generated by the alarm module 101. The alarm information can be in the modes of sound alarm and light alarm. When the rotating speed of the cooling fan 200 is lower than the preset rotating speed threshold value, it is determined that the cooling fan 200 fails, and a user is reminded to timely process the failure of the cooling fan 200 by generating alarm information. The main control board 100 is further provided with a communication module 102, and after the alarm information is generated, the main control board 100 is further configured to: the alert information is sent to the client through the communication module 102. The client comprises a client of a user or a seller. The user or the seller can receive the alarm information sent by the main control board 100 through the mobile phone, the computer and other devices, and then the refrigerator is overhauled in time.

In some embodiments, referring to fig. 2, the heat sink 401 is provided with a temperature sensor 402, and the temperature sensor 402 is a sensor capable of sensing temperature and converting into a usable output signal. A temperature sensor 402 is provided on the heat sink 401 to detect the heat dissipation temperature of the heat sink 401. The temperature sensor 402 is electrically connected to the main control board 100 to transmit a heat dissipation temperature signal to the main control board 100. The main control board 100 is configured to: and receiving a heat radiation temperature signal of the heat radiation fins 401, and if the heat radiation temperature is higher than a preset heat radiation temperature threshold value, closing the heat radiation fan 200, the inner fan 300 and the refrigerating fins 400. The heat radiation condition of the refrigerating sheet 400 is not only affected by the rotation speed of the cooling fan 200, but even in the case where the cooling fan 200 normally operates, the refrigerating sheet 400 may not reach an ideal heat radiation state. The temperature of the cooling fin 401 is monitored through the temperature sensor 402, so that the refrigerating fin 400, the cooling fan 200 and the inner fan 300 can be closed when the cooling fin 401 does not radiate heat in time, and the refrigerating fin 400 is prevented from being damaged.

In some embodiments of the present application, referring to fig. 3, a door 601 is disposed on the box 600, and a hall sensor 602 and a magnet 603 are disposed between the door 601 and the box 600. A hall sensor, also known as a hall effect sensor, is a transducer that converts a changing magnetic field into a change in output voltage. Hall sensors are suitable, above all, for measuring magnetic fields, but also for measuring physical quantities which generate and influence magnetic fields, for example, in proximity switches, hall sensors, position measuring devices, rotational speed measuring devices and current measuring devices. The magnet 603 is a permanent magnet, for example: magnets, permanent magnets, etc. When the door 601 is opened or closed, the distance between the hall sensor 602 and the magnet 603 changes, and the magnetic field of the magnet 603 measured by the hall sensor 602 also changes. The hall sensor 602 is electrically connected to the main control board 100 to convert the magnetic field change detected by the hall sensor 602 into a signal to be sent to the main control board 100, and the main control board 100 can determine the opening and closing condition of the door body 601 according to the signal sent by the hall sensor 602. After the refrigerator starts to operate, the main control board 100 is configured to: when the door body 601 is in an open state, the refrigerating sheet 400 and the inner fan 300 are closed; when the door 601 is in a closed state, the refrigerating sheet 400 and the inner fan 300 are started. When the door body 601 is in an open state, the refrigerating sheet 400 and the inner fan 300 are closed, so that on one hand, noise generated by the inner fan 601 can be reduced; on the other hand, after the door body 601 is opened, the cooling capacity begins to leak, and the operation of the cooling fins 400 is stopped at the moment, so that more cooling capacity waste is avoided.

In some embodiments, an illumination lamp 604 is further disposed in the box 600, and the main control board 100 is configured to: when the door body 601 is in an open state, the illuminating lamp 604 is turned on; when the door 601 is closed, the illumination lamp 604 is turned off. The condition in the refrigerator can be seen more clearly when a user opens the door body 601 to take articles in the refrigerator. Especially, under the condition of low light, the effect is more remarkable.

In some embodiments of the present application, referring to fig. 4, the door 601 is further provided with a distance sensor 605, and the distance sensor 605, also called a displacement sensor, is one of the sensors, and is used for sensing a distance between the door and an object to complete a predetermined function, and is widely applied. The distance sensor 605 may employ an optical distance sensor, an infrared distance sensor, an ultrasonic distance sensor, or the like. A distance sensor 605 is provided on the door 601, and the distance sensor 605 acquires the distance between the casing 600 and the user. The distance sensor 605 is electrically connected to the main control board 100, and after the main control board 100, the heat dissipation fan 200, the inner fan 300, the refrigeration sheet 400 and the rotation speed detection module 500 are turned on, the main control board 100 is configured to: if the distance is smaller than the preset distance threshold, adjusting the rotating speed of the inner fan 300 to a preset first rotating speed value; and if the distance is greater than or equal to the preset distance threshold, adjusting the rotating speed of the inner fan 300 to a preset second rotating speed value. The second rotation speed value is greater than the first rotation speed value, that is, when the distance between the user and the door 601 is a certain distance, the inner fan 300 may reduce the rotation speed. After the inner fan 300 is turned down, the generated noise is reduced, so that the noise heard by the user when the user approaches the door body 601 is reduced. After the user leaves the door 601, the inner fan 300 adjusts the rotation speed back to the normal rotation speed.

For example: when the rotation speed of the inner fan 300 is 1500 rpm, the first rotation speed value is 1500 rpm. The slower the speed, the less noise is generated, so the second rotation speed value should be smaller than the first rotation speed value, the second rotation speed value is set to 1300 rotations per minute, and the distance threshold is set to 1.5 meters. When the distance between the user and the door 601 is less than 1.5 m, the main control board 100 adjusts the rotation speed of the inner fan 300 to 1300 rpm, so as to reduce the noise generated by the inner fan 300. After the user gradually leaves the door 601, that is, when the distance between the user and the door 601 is greater than or equal to 1.5 m, the main control board 100 adjusts the rotation speed of the inner fan 300 back to 1500 rpm.

In some embodiments of the present application, referring to fig. 3, a refrigerator compartment 606 is provided in the cabinet 600. A temperature sensor 402 is disposed in the refrigerating compartment 606, and the temperature sensor 402 is used for detecting the refrigerating temperature of the refrigerating compartment 606. The temperature sensor 402 is electrically connected to the main control board 100 to transmit the cooling temperature to the main control board 100. In practical application, after the refrigerating temperature in the refrigerating chamber 606 reaches the target refrigerating temperature, the refrigerating sheet 400 can be stopped to continue refrigerating, and the target refrigerating temperature can be kept in the refrigerating chamber 606 for a certain time, so that power consumption can be saved. The main control board 100 is configured to: and if the refrigerating temperature is lower than the preset refrigerating temperature threshold value, closing the inner fan 300 and the refrigerating sheet 400. After the refrigerating temperature in the refrigerating chamber 606 gradually rises to be greater than the preset refrigerating temperature threshold value, the refrigerating sheet 400 and the inner fan 300 are restarted to refrigerate the refrigerating chamber 606.

For example: the target refrigerating temperature of the refrigerating chamber 606 is minus 3 degrees centigrade, and after the inner fan 300 and the refrigerating sheet 400 operate for a period of time, the temperature of the refrigerating chamber 606 has reached minus 3.1 degrees centigrade. At this time, the temperature in the refrigerating chamber 606 has already satisfied the target refrigerating temperature, and the main control board 100 turns off the inner fan 300 and the refrigerating sheet 400 to stop refrigerating without the inner fan 300 and the refrigerating sheet 400 to continue refrigerating. After the cooling is stopped for a certain period of time, the temperature of the refrigerating chamber 606 is gradually increased. When the temperature of the refrigerating chamber 606 is higher than minus 3 ℃, the main control board 100 restarts the inner fan 300 and the refrigerating sheet 400 to start refrigerating.

According to the technical scheme, the refrigerator cooling fan detection system is provided, through main control board 100 control on the box 600 cooling fan 200, interior fan 300 the refrigeration piece 400 with opening of rotational speed detection module 500 stops. After the cooling fan 200, the inner fan 300, the refrigeration sheet 400 and the rotation speed detection module 500 start to operate, the rotation speed detection module 500 detects the rotation speed of the cooling fan 200 and feeds a rotation speed signal back to the main control board 100. When the cooling fan 200 fails, the heat in the box body 600 cannot be dissipated in time, which may cause an over-high temperature and damage to the refrigeration sheet 400. Therefore, when the main control board 100 determines that the rotation speed is lower than the preset rotation speed threshold, it is proved that the cooling fan 200 has a fault, and the cooling fan 200, the inner fan 300 and the refrigeration sheet 400 are turned off, so that the refrigeration sheet 400 is prevented from being damaged, and the safety and the working efficiency of the refrigerator are improved.

The application provides a refrigerator cooling fan detecting system can monitor the heat dissipation condition in the refrigerator, can avoid refrigeration piece 400 because the high temperature takes place to damage, has the security height, advantage that work efficiency is high.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims

1. The utility model provides a refrigerator cooling fan detecting system which characterized in that includes: main control board (100), cooling fan (200), interior fan (300), refrigeration piece (400), rotational speed detection module (500) and box (600), wherein:

the main control board (100) is arranged on the box body (600), and the heat radiation fan (200), the inner fan (300), the refrigeration sheet (400) and the rotating speed detection module (500) are all arranged in the box body (600);

the heat radiation fan (200) is electrically connected with the main control board (100), the inner fan (300) is electrically connected with the main control board (100), the refrigeration piece (400) is electrically connected with the main control board (100), and the refrigeration piece (400) is a semiconductor refrigeration piece; the rotating speed detection module (500) is connected with the heat radiation fan (200), and the rotating speed detection module (500) is configured to detect the rotating speed of the heat radiation fan (200); the rotating speed detection module (500) is electrically connected with the main control board (100) so as to feed back a rotating speed signal of the cooling fan (200) to the main control board (100);

the master control board (100) is configured to:

generating a starting instruction, wherein the starting instruction is used for starting the heat radiation fan (200), the inner fan (300), the refrigeration sheet (400) and the rotating speed detection module (500);

receiving a rotating speed signal fed back by the rotating speed detection module (500);

and if the rotating speed is lower than a preset rotating speed threshold value, the heat radiation fan (200), the inner fan (300) and the refrigerating sheet (400) are closed.

2. The refrigerator cooling fan detection system according to claim 1, wherein the cooling fin (400) comprises a cooling fin (401), a temperature sensor (402) is disposed on the cooling fin (401), and the temperature sensor (402) is used for detecting the temperature of the cooling fin (401); the temperature sensor (402) is electrically connected with the main control board (100), the main control board (100) is configured to:

receiving a heat dissipation temperature signal of the heat sink (401);

if the heat dissipation temperature is higher than the preset heat dissipation temperature threshold value, the heat dissipation fan (200), the inner fan (300) and the refrigeration sheet (400) are closed.

3. The refrigerator cooling fan detection system according to claim 1, wherein in the step of generating the start instruction, the main control board (100) is configured to:

and generating a starting instruction, wherein the starting sequence instruction is used for starting the heat radiation fan (200), and after a preset time period, starting the inner fan (300), the refrigerating sheet (400) and the rotating speed detection module (500).

4. The refrigerator cooling fan detection system according to claim 1, wherein in the step of turning off the cooling fan (200), the inner fan (300) and the cooling fin (400), the main control board (100) is configured to:

turning off the inner fan (300) and the refrigeration sheet (400);

and after a preset time period, closing the heat radiation fan (200).

5. The refrigerator cooling fan detection system according to claim 1, wherein a door body (601) is provided on the box body (600), a hall sensor (602) and a magnet (603) are provided between the door body (601) and the box body (600), the hall sensor (602) is used for detecting an opening/closing state of the door body (601), the hall sensor (602) is electrically connected to the main control board (100), and after the main control board (100), the cooling fan (200), the inner fan (300), the cooling fins (400) and the rotation speed detection module (500) are opened, the main control board (100) is configured to:

when the door body (601) is in an open state, the refrigerating sheet (400) and the inner fan (300) are closed;

when the door body (601) is in a closed state, the refrigerating sheet (400) and the inner fan (300) are started.

6. The refrigerator cooling fan detecting system according to claim 5, wherein an illuminating lamp (604) is further disposed in the box body (600), and the main control board (100) is configured to:

when the door body (601) is in an open state, the illuminating lamp (604) is turned on;

and when the door body (601) is in a closed state, the illuminating lamp (604) is turned off.

7. The refrigerator cooling fan detection system according to claim 5, wherein a distance sensor (605) is arranged on the door body (601), and the distance sensor (605) is used for acquiring the distance between the refrigerator body (600) and a user; the distance sensor (605) is electrically connected with the main control board (100), and after the main control board (100), the heat radiation fan (200), the inner fan (300), the refrigeration sheet (400) and the rotating speed detection module (500) are started, the main control board (100) is configured to:

if the distance is smaller than a preset distance threshold value, adjusting the rotating speed of the inner fan (300) to a preset first rotating speed value;

and if the distance is greater than or equal to a preset distance threshold value, adjusting the rotating speed of the inner fan (300) to a preset second rotating speed value, wherein the second rotating speed value is greater than the first rotating speed value.

8. The refrigerator cooling fan detecting system according to claim 1, wherein a refrigerating chamber (606) is provided in the box body (600), a temperature sensor (402) is provided in the refrigerating chamber (606), and the temperature sensor (402) is used for detecting the refrigerating temperature of the refrigerating chamber (606); the temperature sensor (402) is electrically connected with the main control board (100), the main control board (100) is configured to:

and if the refrigerating temperature is lower than a preset refrigerating temperature threshold value, the inner fan (300) and the refrigerating sheet (400) are closed.

9. The refrigerator cooling fan detection system according to claim 1, wherein an alarm module (101) is further disposed in the main control board (100), and the main control board (100) is configured to:

and if the rotating speed is lower than a preset rotating speed threshold value, alarm information is generated through the alarm module (101).

10. The refrigerator cooling fan detecting system according to claim 9, wherein a communication module (102) is further disposed in the main control board (100), and the main control board (100) is configured to:

and if the rotating speed is lower than a preset rotating speed threshold value, the alarm information is sent to a client through the communication module (102).