HEAT SOURCE SYSTEM SETTING TEMPERATURE CONTROL DEVICE, HEAT SOURCE SYSTEM WITH CONTROL DEVICE AND HEAT SOURCE SYSTEM SETTING TEMPERATURE CONTROL METHOD

• Main Authors: NIKAIDO SATOSHI, SAKAI MASANOBU, HAZUI YUSUKE, TAKENAKA YUTAKA, TATEISHI HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

PROBLEM TO BE SOLVED: To prevent a stopping under a light load as much as possible without forcing any excessive operation.SOLUTION: This invention relates to an upper level control device 20 for a heat source system comprising an evaporator for evaporating refrigerant and heat exchanging between the refrigerant and heat source medium; a compressor for compressing the refrigerant; and a condenser for condensing the compressed refrigerant by heat medium, and there is provided a heat source machine for heating the heat medium by the condenser to a prescribed outlet set temperature and supply it to an external load. There are provided a load calculation part 23 for calculating a difference between a first load factor of the heat source machine during its operation and a second load factor in which the heat source machine becomes a minimum heating power transferring to a light load stopping; and a set temperature changing part 24 for decreasing the outlet set temperature of the heat source machine at the first prescribed rate lower than the initial value when the difference calculated by the load calculation part 23 becomes less than the first prescribed value.SELECTED DRAWING: Figure 4 【課題】過剰な運転を強いることなく、軽負荷停止を可及的に防ぐこと。【解決手段】冷媒を蒸発させるとともに冷媒と熱源媒体とを熱交換する蒸発器と、冷媒を圧縮する圧縮機と、圧縮された冷媒を熱媒によって凝縮させる凝縮器とを有し、凝縮器によって熱媒を所定の出口設定温度に加熱して外部負荷に供給する熱源機を備える熱源システムの上位制御装置２０であって、運転中の熱源機の第１負荷率と、熱源機が軽負荷停止に移行する最小加熱能力となる第２負荷率の差を算出する負荷演算部２３と、負荷演算部２３によって算出された該差が第１所定値以下となる場合に、第１所定割合で熱源機の出口設定温度を初期値よりも下降させる設定温度変更部２４とを具備する。【選択図】図４