Device for recording and monitoring the operating status of the refrigerator / freezer motor and element

Abstract

The device, which has a temperature sensor and a flow sensor, stores the temperatures of the refrigerator and freezer and the currents consumed by the motor and element, and monitors the operation of the refrigerator and freezer over a specified period of time.

Description

Description of the invention Title of the invention Device for recording and monitoring the operating status of the refrigerator motor and element Technical background of the relevant invention This invention relates to the field of refrigerator repair and testing and can monitor and store the performance of the motor and element and the temperature of the refrigerator. Technical problem and stating the objectives of the invention After manufacturing or repairing a refrigerator, it is necessary to test its performance to see if the motor and element are working properly and the temperature range in which the refrigerator operates. This requires spending time and money to have someone stand by the refrigerator and check the items. This device stores all the on and offs of the motor and element by recording the number and current consumption, time and date, and also stores the temperature of the refrigerator with the minimum and maximum. This is done during the time the device is connected, and the user receives the desired information accurately by referring to the device after the desired time has passed. A description of the state of the prior art and the history of developments related to the claimed invention. Previous inventions and devices available on the market related to refrigerator performance testers are mainly capable of displaying the temperature instantaneously or only storing the temperature, or are used only for the motor in terms of current and only for the refrigerator in terms of temperature, or are made to test the lamp or hinge of the refrigerator door, but this invention, in addition to displaying the temperature instantaneously and storing its minimum and maximum, displays the temperature during defrosting, the instantaneous current consumption of the motor and element, and stores its minimum and maximum. It also stores the number of times each is turned on and off, plus its time and date, in memory so that the user can monitor the correct operation of the refrigerator in all aspects. Providing a solution to an existing technical problem along with an accurate, sufficient, and integrated description of the invention The device's appearance includes a 16*2 character display, 6 push buttons, and an LED. The user enters their settings with the buttons and can use the buttons to search the device pages and view the desired information. Each of the buttons is connected to a micro socket and is in the default pull-up mode. Also, the LED on the device panel is constantly on when the compressor is on and flashes when the element is on so that the user can see the status from a greater distance. The device consists of two clamp current transformers (CT) that are connected to the main board via 3.5mm sockets and then fed into the amplifier IC to convert the 0 to 1 volt voltage to 0 to 5 volts. Two 10kΩ NTC temperature sensors are also connected to the main board via the HX 2pin socket, and their values ​​are read and the temperature is calculated using the microcontroller's analog-to-digital interface. Each sensor is connected to the microcontroller after being connected to a pull-up resistor and capacitor. The temperature sensors are placed inside the refrigerator and freezer to monitor their temperature, and the current sensors are locked to the motor and element wires to monitor the time and number of on-off cycles and the current consumption. The device inputs are a 12V adapter input, two current sensors in the form of a 3.5mm socket, and two temperature sensors in the form of an HX socket. The device also has a 12V output adapter socket, which is located next to the device for the availability of 12V voltage and testing 12V components such as fans. This device is programmed using an AVR microcontroller as the main processor. The device board includes a power supply circuit that consists of capacitors and a 7805 regulator, an lm358 amplifier IC to amplify the voltage of the current transformers, each of which provides a voltage between 0 and 1V, and a 1307 clock IC with a backup battery and a clock crystal next to it. Explanation of shapes, maps and diagrams The simulated image of the circuit with Proteus software is loaded in the map section, which is explained as follows: (1) Clock IC and its accessories, including crystal, battery, and pull-up resistors (2) Control keys (3)Temperature sensors (4)Microcontroller (5)LED on the panel (6) Bazaar (7) Character display (8)Flow sensors A clear and precise statement of the advantages of the claimed invention over prior inventions. - Separate storage of minimum and maximum refrigerator and freezer temperatures -Display the number of defrost cycles -Display the number of times the engine has been started -Displaying the maximum current consumed by the motor at the moment of starting and afterwards separately -Display the maximum current consumption of the element -Storage of refrigerator temperature during defrosting -Display of motor and element status by LED on the panel - Has a 12-volt power outlet for testing the refrigerator fan or lamp -Easy user interface without the need for special training -Preserving information in the event of a power outage and continuing work after it is reconnected Description of at least one implementation method for implementing the invention The device is attached to the body of the refrigerator by a magnet. The temperature sensors enter the refrigerator and freezer through the door, and the current sensors are locked to the motor and element wires. Then, the device is started by the user's command and the process of measuring and storing values ​​begins. Explicit mention of the industrial application of the invention This invention is for testing the performance of the motor, defrost element, and temperature sensors of a refrigerator after production or repair.

Claims

Claim What is claimed: Claim 1) What is claimed is a device that tests the correct operation of the refrigerator and freezer, which can check and store the correct operation of the motor and defrosting element in terms of the number of times it is turned on and off, the current consumption, and the internal temperature of the refrigerator and freezer without the presence of a person, which reduces human error and reduces time and cost. It consists of a main electronic board, body, temperature sensors, electric current measurement sensors, and a display. The device includes the following: - Adapter for powering the device - Two temperature resistance sensors - Two clamp-on electric current measurement sensors - A display for displaying information - One LED to display the status of the refrigerator and freezer motor and element - Main board - Device box or body - 12-volt power outlet Claim 2) According to claim number 1, two 10k ohm waterproof wired resistance temperature sensors with a two-pin HX socket are connected to the bottom of the main board, one of which is for receiving the refrigerator temperature and the other for receiving the freezer temperature. The device can store the minimum and maximum temperatures of both environments and display the current temperature. Claim 3) According to claim number 1, two wired clamp electric current measuring sensors that open and close in a clamp are connected to the bottom of the main board using a 3.5 mm socket, one of which is for measuring the motor current and the other for measuring the element current. By measuring the current, the device calculates and stores the number of on-offs, the time and date of the current, and the amount of current consumed. Claim 4) According to claim number 1, there is an LED on the front frame of the device that stays on if the motor is detected to be on and blinks if the element is detected to be on. Claim 5) According to claim number 1, the box is in the shape of a rectangular cube and includes outputs at the bottom and a magnet at the back, six buttons at the bottom front and a display location at the top front, and a 12-volt output on the left side. Claim 6) According to claim number 1, the main board is placed inside the box and under the display, which includes the following main items: - AVR processor as the main processor - LM358 amplifier IC to amplify the voltage of the current sensors - DS1307 IC to calculate the time and date - 6 push buttons - Backup battery for the clock IC - Sensor and adapter input sockets