Method and apparatus for checking a pressure monitoring device of a compression refrigerating plant
View Patent ↗A pressure monitoring device of a compression refrigerating plant having a compressor, a condenser and an energy discharge device cooperating with the latter, is tested by an automatically proceeding self-test program. In this case, the energy discharge device is at least throttled back and the compressor is operated up to a response point of the pressure monitoring device.
1. A method of checking a pressure monitoring device of a compression refrigerating plant, the compression refrigerating plant having a compressor, a condenser and an energy discharge device cooperating with the condenser, the pressure monitoring device disposed in a high-pressure part of the compression refrigerating plant between the compressor and the condenser, which comprises the steps of:
performing an automatically proceeding self-test program, which includes the steps of:
throttling back the energy discharge device; and
operating the compressor up to a response point of the pressure monitoring device.
2. The method according to claim 1 , which further comprises starting the self-test program if an operator of the compression refrigerating plant triggers a single starting command performed by actuating a switch.
3. The method according to claim 1 , which further comprises storing process proceedings of the self-test program automatically in a control and regulating device.
4. The method according to claim 1 , which further comprises automatically interrupting a supply of energy to the compressor when a maximum number of triggerings of the pressure monitoring device per unit time is exceeded.
5. An apparatus for performing a self-test in a compression refrigerating plant, the compression refrigerating plant having a compressor, a condenser, and an energy discharge device cooperating with the condenser, the apparatus comprising:
a self-test module; and
a pressure monitoring device connected and cooperating with said self-test module, said pressure monitoring device disposed in a high-pressure part of the compression refrigerating plant between the compressor and the condenser;
said self-test module programmed to perform an automatically proceeding self-test program, the self-test module programmed to:
throttle back the energy discharge device; and
operate the compressor up to a response point of said pressure monitoring device.
6. The apparatus according to claim 5 , wherein the energy discharge device is a fan controlled by said self-test module.
7. The apparatus according to claim 5 , further comprising a pressure indicator device functioning independent of the self-test program.
8. The apparatus according to claim 5 , further comprising a key switch connected to said self-test module for initiating a start of the self-test program.
9. A compression refrigerating plant, comprising:
a compressor;
a condenser;
an energy discharge device cooperating with said condenser;
a self-test module connected to and controlling said condenser; and
a pressure monitoring device connected and cooperating with said self-test module, said pressure monitoring device disposed in a high-pressure part of the compression refrigerating plant between said compressor and said condenser;
said self-test module programmed to perform an automatically proceeding self-test program, said self-test module programmed to:
throttle back said energy discharge device; and
operate said compressor up to a response point of said pressure monitoring device.
10. The compression refrigerating plant according to claim 9 , wherein said energy discharge device is a fan.
11. The compression refrigerating plant according to claim 9 , further comprising a pressure indicator device functioning independent of the self-test program.
12. The compression refrigerating plant according to claim 9 , further comprising a key switch connected to said self-test module for initiating a start of the self-test program.