Peltier module to cool below 0 degree Celsius


#1

Hello,

I’m looking for a Peltier cooling module and controller for my 3D printer.

I have not used Peltier devices before, So I need help choosing a proper module for my application.

Room temperature : 20 - 34 Degree Celsius

Peltier cooling: Below -10 Degree Celsius

Application: Cooling down a syringe containing liquid

I also have some doubts

Q1. Can the same module be used to heat the surface if I reverse the polarity of supply( I want the same end to be cold sometimes and Hot some other times)

Thanks


#2

Hello,

Thank you for your inquiry. What voltage and current are you going to be working with? If your operating temperature is going to be 20 -34 degree C we would only have one module that fits that. It is made by CUI Inc, and their part number is CPM-2F. Here is a link. https://www.digikey.com/short/p8p33z For a peltier you will have a set hot and cold side. If you reverse polarity the original cold side becomes the hot side and vice versa.

Thanks, Bobby


#3

Like I said I have not used Peltier devices before. For the completion of one of my projects, I need to cool down a syringe(55 CC) below -10 degree Celsius. The power supply used for 3D printer is 12V 20A. I think I can step down voltage if Peltier needs a low voltage. But the cold side should reach -10 Degree Celsius when machine is used in a room having temperature 20-35 degree Celsius.


#4

You may need to step down the voltage and current depending on the specific module. The temperature that you need for your application was only met by the one option I gave above. I looked through our options, but we do not have many options for the temperature you need.


#5

Okay
SO this Module can reach -10 Degree Celsius.

How to find the maximum lowest temperature it can reach
Is there any controller for this module?


#6

There is no controller for this module. The cold point can be found on the datasheet here. https://www.cui.com/product/resource/cpm-2f.pdf


#7

There are a couple of good application notes on the use of peltier devices here and here that I would suggest, and having a good handle on the basics of thermal analysis is also a key ingredient in being successful on purpose in this area.

The “Delta Tmax @ Th” parameter describes the maximum temperature difference a device can produce when it’s not pumping any heat. The quoted figure applies at the hot-side temperature (Th) indicated, and doesn’t change all that terribly much if the actual Th differs slightly. The 30 to 45°C temperature difference being asked for is well under the 60 to 70 that most single-stage devices are capable of, so in principle just about any such device could be used at room temperature to make -10°C.

In practice, the quality of one’s physical implementation makes a huge difference in what’s achievable or not, and understanding the concepts in the references above references is really quite important; the solutions to common problems here can be the exact opposite of what might expect.