How to Make a Capsule Heat Pump for Heating Up to +60 °C and an Air Conditioner for Cooling Down to -50 °C. Significant Money Savings.

Today, I have prepared an exciting project and a detailed guide on how to create a small prototype of a mini heat pump at home with your own hands.

Some of the required materials include:

1. High-pressure valve
2. Adapter coupling
3. Copper tubes of three different diameters: capillary tube, evaporator tube, and transition sleeves
4. High-pressure hoses
5. Fan
6. Power supply
7. High-pressure elbow fittings
8. 20 g dryer filter
9. Three 10 g dryer filters.

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To start, you need to cut the dryer filter into two parts, leaving a 1 cm margin from the edge. Then, remove the mesh, empty all the contents, and drill three holes in it.

Next, use PTFE tape to tightly seal the thread on the valve adapter coupling and then attach the cut part of the dryer filter to it.

Create the evaporator from a copper tube. To do this, find a suitable part, pipe, or container with a diameter of about 10 cm and wind approximately 10 coils around it. Note that the diameter of the evaporator should not exceed the number of coils and should not be less than two coils.

Wrap the capillary tube around the 10 g copper dryer filter. For more details on the number of coils required for each dryer filter, you can check out the video.

Assemble all the high-pressure flexible components. Connect the adapters to the flexible hoses.

Preliminarily, use soldering paste or flux to thoroughly coat all connections, then carefully solder them to ensure that all components are sealed tightly and there are no leaks under high pressure.

Install the high-pressure compressor, fan, and connector for the power supply. Note that the compressor must be specifically designed for high-pressure operation, preferably a piston-type and metal compressor. Membrane and water-based compressors are unsuitable, as they cannot provide the necessary seal and performance for high pressure, which is required to convert the gas from liquid to gaseous state.

After completing the assembly, it is essential to perform vacuuming of the system. First, vacuuming will help identify any potential leaks. Secondly, along with the air, we evacuate any moisture, and also create more space to inject a larger amount of refrigerant, which helps it transition from gaseous to liquid form. This process will cool one part of the system and heat another part during pressure fluctuations.

Now we can perform the first test, which showed quite good results. After about 10 minutes, you can notice a small frost forming on the evaporator, then in some places it starts to melt and then cools again. This happens because the pipeline of this refrigerator needs to be at least 3 meters long to allow the liquid to transition properly from liquid to gaseous phase. In our case, sometimes reverse pressure occurs, which may slightly heat up the cooling part, but in principle, we managed to achieve around +60°C on the capsule condenser and about -50°C on the evaporator. For more details on building this heat pump, you can watch my video on the romanursuhack channel. There, you will find more videos and information on this topic. Please subscribe and rate my channel. Also, don't forget about the discounts on the JLCMC website, and that you can get a nice bonus through my link. Thank you very much!