00:00:00.000 --> 00:00:03.190 Have you ever wondered how your refrigerator works? 00:00:03.620 --> 00:00:07.720 Refrigerators use simple and interesting scientific principles 00:00:07.720 --> 00:00:10.900 Became an integral part of the home 00:00:12.080 --> 00:00:15.095 With a basic refrigerator model 00:00:15.095 --> 00:00:17.815 Explain in detail the operation of modern refrigerators 00:00:17.815 --> 00:00:20.885 Demystifying the good energy conversion efficiency behind refrigerators 00:00:22.715 --> 00:00:25.495 The basic refrigerator principle is simple 00:00:25.495 --> 00:00:29.600 Cooling by continuously passing cooler refrigerant in the object 00:00:32.000 --> 00:00:36.300 Let's see how the refrigerant in the refrigerator flows 00:00:37.060 --> 00:00:39.540 A simple device called a refrigerant controller 00:00:39.540 --> 00:00:41.900 Is the most important component of a refrigerator 00:00:41.980 --> 00:00:45.240 Capillaries are used as channels in the refrigerant controller 00:00:45.240 --> 00:00:48.420 Refrigerant flows by generating capillary phenomenon 00:00:48.420 --> 00:00:50.960 To ensure more efficient flow 00:00:50.965 --> 00:00:53.775 Refrigerators must ensure that the refrigerant at the inlet is under high pressure 00:00:55.880 --> 00:00:58.540 Refrigerant is injected into the pipe 00:00:58.540 --> 00:01:01.900 Pressure drops when refrigerant flows 00:01:01.900 --> 00:01:07.200 When the pressure drops, the boiling point of the refrigerant also decreases. 00:01:07.200 --> 00:01:12.115 Decrease of boiling point has enough energy for evaporation of refrigerant 00:01:12.115 --> 00:01:14.235 So evaporation causes the temperature to drop 00:01:15.615 --> 00:01:18.305 If you observe the temperature of the refrigerant controller, 00:01:18.305 --> 00:01:19.855 You will find this phenomenon 00:01:23.020 --> 00:01:26.480 Please note that only in this part of the refrigerant will evaporate 00:01:26.480 --> 00:01:29.700 This is an important part of refrigerant flow 00:01:29.700 --> 00:01:34.720 It should be able to change the pressure of the refrigerant at this stage at room temperature 00:01:36.620 --> 00:01:38.840 The next stage is simple 00:01:38.840 --> 00:01:41.920 Just let the refrigerant pass through to cool the inside of the refrigerator 00:01:45.140 --> 00:01:46.880 When absorbing heat 00:01:46.880 --> 00:01:50.800 Refrigerant further evaporates and converts into more pure vapor 00:01:51.960 --> 00:01:55.040 Heat exchange at this stage 00:01:55.040 --> 00:01:57.220 Did not increase the temperature of the refrigerant 00:01:57.220 --> 00:01:59.980 This heat exchange is called evaporation 00:02:03.820 --> 00:02:06.635 Thanks to using the evaporator fan in the refrigerator 00:02:06.635 --> 00:02:08.635 Manufacturing air circulation 00:02:08.640 --> 00:02:11.540 Ability to maintain different levels of temperature 00:02:13.180 --> 00:02:16.180 So we produce the desired cooling effect 00:02:16.180 --> 00:02:19.640 If we can change the low-pressure refrigerant back to its original state 00:02:19.640 --> 00:02:22.140 Which is changed back to high pressure liquid 00:02:22.140 --> 00:02:23.820 We will repeat this process 00:02:24.195 --> 00:02:26.985 So the first step is to increase stress 00:02:27.085 --> 00:02:29.615 The compressor is used for this purpose 00:02:31.585 --> 00:02:35.035 The compressor will increase the pressure to its initial pressure value 00:02:35.325 --> 00:02:38.795 You can see here using a reciprocating compressor 00:02:39.165 --> 00:02:42.155 However, while compression is in progress 00:02:42.155 --> 00:02:44.705 Temperature rises with pressure 00:02:44.705 --> 00:02:46.275 Is not allowed to happen 00:02:47.165 --> 00:02:50.135 The state of the refrigerant is high-pressure gas. 00:02:50.140 --> 00:02:52.520 To transform it into a liquid 00:02:52.540 --> 00:02:54.600 We will introduce another heat exchange device 00:02:54.860 --> 00:02:57.740 This device is set outside the refrigerator 00:02:57.740 --> 00:03:00.660 Thus releasing heat around it 00:03:00.740 --> 00:03:03.140 Refrigerant will change from gaseous to liquid 00:03:03.180 --> 00:03:04.960 The temperature will also reach normal levels 00:03:04.980 --> 00:03:06.700 This device is called a condenser 00:03:07.185 --> 00:03:09.655 Now the refrigerant has returned to its original state 00:03:09.655 --> 00:03:12.615 So it can provide refrigerant controller at one time 00:03:15.405 --> 00:03:17.565 Just keep repeating this cycle 00:03:17.785 --> 00:03:20.615 We will be able to achieve a continuous cooling effect 00:03:20.615 --> 00:03:24.700 Furthermore, this cycle is called a vapor compression cycle 00:03:25.300 --> 00:03:28.275 The performance of a refrigerator can be determined by a method called 00:03:28.280 --> 00:03:30.380 Find the formula for "performance coefficient" 00:03:30.500 --> 00:03:34.375 The formula is from output (heat absorption) ÷ input (power used) 00:03:34.375 --> 00:03:37.505 As shown in the figure, the representation number can be easily obtained from the definition 00:03:40.225 --> 00:03:43.235 This may have been the most basic refrigerator 00:03:43.235 --> 00:03:46.225 This refrigerator can theoretically run smoothly 00:03:46.225 --> 00:03:48.825 But in practice it encounters many problems 00:03:48.825 --> 00:03:51.985 Let's take a look at the problem and how to overcome it 00:03:53.785 --> 00:03:57.600 The main problem is frost in the freezer 00:03:59.515 --> 00:04:02.555 Water molecules in the air in the freezer 00:04:02.555 --> 00:04:05.595 So when air comes in contact with the evaporator tray 00:04:05.595 --> 00:04:09.800 They will condense and frost around the evaporator dish 00:04:10.595 --> 00:04:13.715 The surface of the frost can cause heat to not be transmitted 00:04:13.715 --> 00:04:16.175 And the performance of the refrigerator decreases over time 00:04:16.835 --> 00:04:19.765 The smartest way is with the help of a heating tube 00:04:19.765 --> 00:04:21.595 Remove frost at regular intervals 00:04:23.435 --> 00:04:26.365 That's why the bottom of your refrigerator 00:04:26.365 --> 00:04:27.985 There will be a basin 00:04:32.665 --> 00:04:35.615 Also, in modern refrigerators 00:04:35.615 --> 00:04:38.625 You will not see the condenser tray behind your refrigerator 00:04:38.625 --> 00:04:41.565 Replaced by a more compact design 00:04:44.005 --> 00:04:46.875 The ability to achieve a compact design is entirely aided by a cooling fan 00:04:46.935 --> 00:04:49.835 The effect of insulating hot air is also achieved here. 00:04:49.835 --> 00:04:52.795 And hot air can also be used during defrosting 00:04:52.795 --> 00:04:55.975 Used to evaporate the water that flows down after defrosting 00:04:58.595 --> 00:05:01.305 The refrigerator looks like this after improvement 00:05:02.395 --> 00:05:07.300 The temperature distribution of various parts of the refrigerator is shown in the figure, which is interesting 00:05:07.655 --> 00:05:12.100 The schematic diagram of the temperature through the capillary is also more detailed here 00:05:12.835 --> 00:05:15.725 You can see there are two refrigerant tubes outside the refrigerator 00:05:15.725 --> 00:05:18.725 A strip of liquid refrigerant from the capillary to the evaporation pan (capillary) 00:05:18.725 --> 00:05:23.800 The other one takes the gaseous refrigerant away from the evaporator (return pipe) 00:05:26.645 --> 00:05:31.500 When you look at your refrigerator, you can only see that there is only one line on the outside 00:05:32.045 --> 00:05:33.795 Why is this so? 00:05:34.385 --> 00:05:37.095 The most important part of a refrigerator is the capillary 00:05:37.095 --> 00:05:40.265 Capillaries require a device that does not look like a spring 00:05:40.265 --> 00:05:43.705 It can become a slender pipeline as shown 00:05:44.695 --> 00:05:49.400 Temperature chart of the new capillary is here 00:05:50.905 --> 00:05:58.000 You only see one line because it's all integrated into the backpipe 00:05:59.585 --> 00:06:02.595 This simple device makes a big difference 00:06:03.655 --> 00:06:06.615 We know that when the refrigerant absorbs heat, 00:06:06.615 --> 00:06:09.285 The temperature itself has not increased 00:06:09.285 --> 00:06:11.195 Only when the temperature increases 00:06:13.080 --> 00:06:18.020 Means if we put the capillary in the return tube 00:06:18.020 --> 00:06:22.260 Will reduce the temperature of the refrigerant in the capillary 00:06:24.680 --> 00:06:28.600 This effectively reduces the temperature inside the capillary 00:06:28.600 --> 00:06:31.700 Created a further improvement in refrigerant efficiency 00:06:32.575 --> 00:06:35.165 On the other hand, the heat absorbed by the return trachea 00:06:35.165 --> 00:06:41.300 Will ensure a successful vaporization of the refrigerant in the return pipe 00:06:41.360 --> 00:06:45.400 This is beneficial for compressors designed to compress only gaseous refrigerants 00:06:47.280 --> 00:06:53.400 The dew tube is designed to remove moisture that affects the operation of the compressor 00:06:55.060 --> 00:07:00.140 Now let ’s take a look at what innovations have changed the refrigerator. 00:07:00.900 --> 00:07:03.220 "Digital Inverter Compressor" 00:07:03.875 --> 00:07:06.705 The compressor is the heart of all refrigerators 00:07:06.705 --> 00:07:09.380 It also brings life to the entire refrigerator system 00:07:10.400 --> 00:07:12.720 You may notice the compressor in the old refrigerator 00:07:12.740 --> 00:07:15.220 Turn it on and off 00:07:15.220 --> 00:07:16.920 This is called "single speed operation" 00:07:16.920 --> 00:07:20.500 When the internal temperature reaches its optimal state 00:07:20.500 --> 00:07:22.280 The compressor will shut itself down 00:07:22.280 --> 00:07:24.300 When the temperature exceeds a certain limit 00:07:24.340 --> 00:07:26.340 The compressor will start on its own 00:07:27.440 --> 00:07:31.760 So you will find that the internal temperature control is not very stable 00:07:31.760 --> 00:07:34.540 Also, sudden speed changes 00:07:34.540 --> 00:07:37.480 Can adversely affect the durability of compressor components 00:07:39.400 --> 00:07:41.580 With digital inverter compressor 00:07:41.680 --> 00:07:45.415 The speed of the compressor can be changed 00:07:45.415 --> 00:07:48.675 Thus achieving smooth and efficient temperature control of the evaporator 00:07:49.180 --> 00:07:53.060 Here the controller converts AC power to DC power 00:07:53.060 --> 00:07:55.180 The controller uses the power and frequency 00:07:55.180 --> 00:07:58.460 Accurately controls the speed of the motor 00:07:59.600 --> 00:08:02.580 Generally most motors using this technology 00:08:02.580 --> 00:08:04.375 Called "DC Brushless Motor" 00:08:04.380 --> 00:08:07.080 Digital inverter compressors than single speed compressors 00:08:07.080 --> 00:08:09.380 Reduced consumption by at least 40% 00:08:10.780 --> 00:08:15.340 We hope the video gives you a better understanding of how refrigerators work 00:08:15.340 --> 00:08:17.860 You can fund us at patreon.com 00:08:17.860 --> 00:08:19.440 Make sure our service works 00:08:19.440 --> 00:08:20.500 Thank you!!!!!!!!
Office location
Engineering company LOTUS®
Russia, Ekaterinburg, Lunacharskogo street, 240/12