Heat source unit and refrigeration system

Abstract

To provide a heat source unit that suppresses deterioration of efficiency of a refrigeration device.SOLUTION: A heat source unit includes a compressor (22) and a radiator (23) constituting a refrigerant circuit (R) that executes a refrigeration cycle and connected to the refrigerant circuit (R). The refrigerant circuit (R) has an evaporator (33) connected thereto and includes a control section (100) that varies a frequency of the compressor (22) so that when pressure loss of suction piping (12) connecting the evaporator (33) and the compressor (22) during execution of the refrigeration cycle is defined as ΔP1, suction pressure of the compressor (22) becomes a value obtained by subtracting ΔP1 from preset suction pressure. ΔP1 is calculated on the basis of pressure loss ΔP0 of the suction piping (12) calculated beforehand and rotational frequency of the compressor (22).SELECTED DRAWING: Figure 3

Claims

1. A heat source unit comprising a refrigerant circuit (R) that executes a refrigeration cycle, and a compressor (22) and a heat exchanger (23) connected to the refrigerant circuit (R), An evaporator (33) is connected to the refrigerant circuit (R). During the operation of the refrigeration cycle, the pressure loss in the suction pipe (12) connecting the evaporator (33) and the compressor (22) is ΔP 1 When that happens, The suction pressure of the compressor (22) is set to ΔP from a preset suction pressure. 1 The system includes a control unit (100) that varies the frequency of the compressor (22) so that it is a value obtained by subtracting from the specified value. Said ΔP 1 The pressure loss ΔP of the suction pipe (12) is calculated in advance. ０ And, calculated based on the ratio of the current rotational speed of the compressor (22) to the maximum rotational speed of the compressor (22), The aforementioned ΔP0 is the pressure loss when the rotational speed of the compressor (22) is at its maximum. Heat source unit.

2. A refrigeration system having a heat source unit (20) and a utilization unit (30) comprising the evaporator (33) described in claim 1.

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