Cool even in rooms over 30°C! Compact and easy-to-carry Shiroka portable cooler “SY-D151”

A portable cooler that is useful in areas such as kitchens where it is difficult to keep cool even when the air conditioner is turned on, and sanitary rooms where hot air tends to build up. To see how cool it can be, I tried it with the SY-D151 Siroca, which has a compact size that makes it easy to carry around and a stylish design that is not embarrassing to put in a visible place.
A small portable cooler that can cool air, dehumidify, and blow air
The portable air conditioner has a structure in which the indoor and outdoor units of the air conditioner are integrated, so there is no need for a contractor to install it, and it can be used simply by plugging it into an outlet. Although they are basically portable, there are various sizes depending on the product, from those that can be easily held with one hand to those that can be moved using casters equipped on the main unit. The SY-D151 introduced this time is characterized by its light weight of about 6.5 kg and its small size, even though it is equipped with a compressor. However, the cooling capacity of the SY-D151 is not very high at 0.350kw, as the body size and cooling capacity are generally proportional. It is said that cold wind of about -7 ℃ comes out from room temperature when cold wind is operated, but I am wondering how cool it actually feels.
Compressor-type SY-D151 not only blows cold air, but can also dehumidify in the same way as a compressor-type dehumidifier. Equipped with 3 modes of “cold air”, “dehumidification” and “ventilation”, it can be used all year round. In addition, by adopting a DC compressor, it also features reduced power consumption. The power consumption in cold air mode is 160W, so the electricity bill when used for 8 hours is about 35 yen (calculated at 27 yen per kWh).
One thing to keep in mind is the exhaust heat in cold air mode. If the air conditioner is in cooling operation, heat is released from the outdoor unit to the outside, but the portable cooler also releases cold air and exhaust heat from the back (or side) at the same time. Therefore, if you continue to use it normally, the temperature of the room may rise due to exhaust heat. This is unavoidable due to the structure of portable coolers, so many products come with ducts that allow exhaust heat to escape to the outside. The SY-D151 also comes with a duct, so if you want to cool down efficiently, you should install a duct (details will be described later).
Let’s measure the temperature of cold air and exhaust heat when using cold air mode. The room temperature to be verified is 31°C and the humidity is 61%. Doors and windows are closed and no air conditioning is used. The cool air mode of SY-D151 can be used in an environment where the room temperature is 17 to 38 ° C and the humidity is 90% or less, so it can be used without problems.

By the way, you can check the air volume and operating sound in the video below. I switched the air volume in order of “1”, “2”, and “3”, but the impression that the cold air that is released does not reach very far. Then, when I placed a decibel meter 1m away from the SY-D151 and checked the operating noise, it was about 50dB, a level that is almost unnoticeable in daily life at an air volume of “1.” It was about 54 to 55 dB at air volume “2” and about 60 dB at air volume “3”, so if you use it at air volume “3” while watching TV or talking to people, you may be worried about the driving sound. I can’t.
I’m a little worried about how to use it with a heat exhaust duct attached
As mentioned above, in order to cool efficiently with a portable cooler that emits cold air and exhaust heat at the same time, it is effective to install a duct that releases exhaust heat to the outside. So, I attached the duct that came with the SY-D151.
The influence of waste heat can be suppressed by placing the tip of the duct in a different room from the one in which it is used. But here’s the problem! I was thinking of inserting the duct attached to the portable cooler through the gap between the window and exhausting the heat outside, but there was a gap above the duct.
Even if you can prevent insects from entering to some extent with a screen door, warm outside air will enter, so you need a panel to fill the gap. Unfortunately the SY-D151 doesn’t come with such a panel, so you’ll have to make your own or buy one that fits. However, in the case of such usage, it is a neck that the window cannot be locked. The same is true for products that come with a dedicated panel, and you need to remove the panel each time you lock the window. Also, since there is a risk of failure due to intrusion of rain or wind, the instruction manual states.
In this test, cold air was emitted even in a room with a temperature of over 30°C, and I was impressed with its performance, which exceeded my expectations. However, it seems difficult to make multiple people comfortable because only those who are hit by the cold wind are cool. However, if you can’t use the air conditioner, for example, if you use the duct outside the tent in a narrow space such as a tent (you need to use the front room to avoid the effects of rain and wind), you can’t cool it down. Even without it, I feel like the heat that was filled will be reduced.

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