A regulation apparatus for a refrigeration plant, wherein at least one refrigerating fluid path is defined in the refrigeration plant and at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan, are arranged along said refrigerating fluid path, wherein said regulation apparatus includes
- a first sensor configured to be arranged in a first point (P1) along the refrigerating fluid path of the refrigeration plant to detect a first value of a quantity in said first point (P1),
- a second sensor configured to be arranged in a second point (P3) along the fluid path of the refrigeration plant to detect a second value of said quantity in said second point (P3),
- and
- an actuator configured to actuate said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan of the refrigeration plant,
- wherein said regulation apparatus is configured to store reference values or set points of said quantity in said first point (P1) and of said quantity in said second point (P3),
- wherein said regulation apparatus is further configured to store the reference value or set point for the quantity measured by the first sensor, and the reference value or set point for the quantity measured by the second sensor and said regulation apparatus being further configured to store a first neutral zone, wherein the first neutral zone is a range of values including the first reference value and said regulation apparatus being further configured to store a second neutral zone, wherein the second neutral zone is a range of values including the second reference value,
- wherein a constant regulation of said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan is provided in said first neutral zone and second neutral zone and a regulation request is stopped or is blocked at a value such as to satisfy specific operating conditions in the refrigeration plant,
- wherein said constant regulation determines no regulation request and no need of modifying operating parameters of said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan, and wherein a regulation request is a request of modifying the operating parameters of said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan in feedback if the value of said quantity deviates from the respective reference value;
- wherein said regulation apparatus is further configured to set a zone of reduction or decrease of the regulation and a zone of growth or increase of the regulation,
- said regulation apparatus being further configured to control a first real value detected by said first sensor and check if said first detected value is inside the first neutral zone, in the growth zone or in the zone of reduction or decrease for said first sensor, and calculate a first regulation request (Req_p1) of the operating parameters of said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan of the refrigeration plant,
- said regulation apparatus being further configured to control a value detected by said second sensor for said second point (P3), and said regulation apparatus being further configured to check whether said value detected by the second sensor for said second point (P3) is located within the respective neutral zone, growth zone or zone of reduction or decrease for said second sensor or for said second point (P3), and
- said regulation apparatus being further configured to derive a second regulation request (Req_p3) of the operating parameters of said at least one compressor, at least one capacitor, at least one valve or ejector, or at least one fan of the refrigeration plant, and
- wherein said regulation apparatus is further configured to compare the first regulation request (Req_p1) on said first sensor with the second regulation request (Req_p3) on said second sensor, said regulation apparatus is further configured to establish which regulation request improves safety greater for said refrigeration plant, and
- wherein said regulation apparatus controls the actuator configured to actuate said improved safety regulation request for said refrigeration plant.