if your home has updated wiring and you aren't living in a house where the wiring is from the turn of the last century and your compressor runs on 110 to 120 not 220-240 then changing to a twenty amp fuze to solve your issue is ok.
But you might want to figure out what else is on that circuit and why the compressor is blowing the 15 amp fuze. It will likely be rated to run at much lower than that, but for some reason when it starts up there is a spike in the amps it draws, thus blowing the fuze. It's a common issue with electric motors.
If the line you are running it on also has the fridge on it, for instance, the combined amps might be too high when both are starting at the same time or one is running and the other starts.
If nothing else is running on the circuit the motor on the compressor may be bad.
Put an amp probe on it when it starts up and see what it is trying to pull. If it is really high you may need a new compressor motor.
But most likely it is a matter of too much on one circuit. I recommend looking in to the following: First find out what is on the circuit. Check what amperage the manufacturer recommends you run it on. Call them if need be, Check the amperage it tries to draw on start up. if below 20 amps switch to a twenty amp fuze or breaker. If above I would start worrying about the motor.
But I would not switch to a thirty amp fuze unless that is what the manufacturer recommends, which is doubtful.