冷媒の過熱度

US9068766(JP, Mitsubishi)
"1. An air-conditioning and hot water supply combination system comprising:
one or a plurality of use units each equipped with at least a use side heat exchanger;
少なくとも利用側熱交換器が搭載された１台又は複数台の利用ユニットと、

one or a plurality of hot water supply units each equipped with at least a hot water supply side heat exchanger;
少なくとも給湯側熱交換器が搭載された１台又は複数台の給湯ユニットと、

one or a plurality of heat source units connected to the use units and the hot water supply units, each heat source unit being equipped with a compressor, a heat source side heat exchanger, a heat source side pressure reducing mechanism, a bypass that bypasses a liquid refrigerant on a high-pressure side to a low-pressure side, a low-pressure bypass pressure reducing mechanism disposed in the bypass, an accumulator, and a subcooling heat exchanger that exchanges heat between the liquid refrigerant on the high-pressure side and the refrigerant on the low-pressure side flowing through the bypass;
前記利用ユニットと前記給湯ユニットに接続され、圧縮機、熱源側熱交換器、熱源側減圧機構、高圧側の液冷媒を低圧側へとバイパスするバイパス回路、前記バイパス回路に設けられた低圧バイパス減圧機構、アキュムレーター、及び、高圧側の液冷媒と前記バイパス回路を流れる低圧側の冷媒とを熱交換させる過冷却熱交換器が搭載された１台又は複数台の熱源ユニットと、

and
one or a plurality of branch units connected to the use units, the hot water supply units, and the heat source units, each branch unit including a use side pressure reducing mechanism that controls the flow of the refrigerant flowing into the use unit in accordance with an operation state in the use unit, and a hot water supply pressure reducing mechanism that controls the flow of the refrigerant flowing into the hot water supply unit in accordance with an operation state in the hot water supply unit,
前記利用ユニット及び前記給湯ユニットと前記熱源ユニットに接続され、前記利用ユニットの運転状態に応じて前記利用ユニットに流入させる冷媒の流れを制御する利用側減圧機構、及び、前記給湯ユニットの運転状態に応じて前記給湯ユニットに流入させる冷媒の流れを制御する給湯減圧機構が搭載された１台又は複数台の分岐ユニットと、を有し、

wherein when an evaporating pressure or an evaporating temperature calculated from the evaporating pressure reaches a first predetermined value or higher, the degree of superheat of the refrigerant on the low-pressure gas side of the subcooling heat exchanger or the degree of subcooling of the refrigerant on the high-pressure liquid side of the subcooling heat exchanger is controlled by the opening degree of the low-pressure bypass pressure reducing mechanism, such that the evaporating pressure or the evaporating temperature calculated from the evaporating pressure is less than or equal to the first predetermined value."

蒸発圧力又は該蒸発圧力から演算される蒸発温度が予め定められている第１所定値以上となったとき、前記低圧バイパス減圧機構の開度によって、前記過冷却熱交換器の低圧ガス側における冷媒の過熱度又は前記過冷却熱交換器の高圧液側における冷媒の過冷却度を制御し、蒸発圧力又は該蒸発圧力から演算される蒸発温度が前記第１所定値以下となるようにしている

  ことを特徴とする空調給湯複合システム。

US9581365(JP, Daikin)
"1. A refrigerating apparatus including a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, an expansion valve, and a utilization-side heat exchanger are connected together and which is configured to perform a refrigeration cycle,
圧縮機（31）、熱源側熱交換器（40）、膨張弁（33）、及び利用側熱交換器（32）が接続されて冷凍サイクルを行う冷媒回路（20）を備え、

in which the heat-source-side heat exchanger includes an upper main heat exchange part and a lower auxiliary heat exchange part arranged in a vertical direction,
上記熱源側熱交換器（40）は、上下に配置された上側の主熱交換部（50）と下側の補助熱交換部（55）とを備え、

the main heat exchange part and the auxiliary heat exchange part each include
上記主熱交換部（50）及び補助熱交換部（55）は、

a standing first header and a standing second header,
それぞれ立設された第１ヘッダ（51,56）及び第２ヘッダ（52,57）と、

a plurality of flat heat transfer pipes which are arranged in the vertical direction and which are connected, at one end thereof, to the first header and connected, at the other end thereof, to the second header, and
側面が対向するように上下に配列され、各々の一端が上記第１ヘッダ（51,56）に接続され他端が上記第２ヘッダ（52,57）に接続された複数の扁平な伝熱管（53,58）と、

a fin joined between adjacent ones of the heat transfer pipes, and
隣り合う上記伝熱管の間に接合されたフィン（54,59）とを有し、

a switching mechanism configured to switch the heat-source-side heat exchanger between an evaporation mode in which refrigerant is evaporated in the heat-source-side heat exchanger while flowing so as to branch into the main heat exchange part and the auxiliary heat exchange part and a condensation mode in which the refrigerant is condensed while passing through the main heat exchange part and the auxiliary heat exchange part in this order is provided,
上記熱源側熱交換器（40）において、冷媒が上記主熱交換部（50）と上記補助熱交換部（55）とに分流して通過する間に該冷媒を蒸発させる蒸発動作と、冷媒が上記主熱交換部（50）と上記補助熱交換部（55）を順に通過する間に該冷媒を凝縮させる凝縮動作とを切り換える切換機構（60）を備えた冷凍装置であって、

the refrigerating apparatus comprising:
a superheat degree controller configured to control, in the evaporation mode of the heat-source-side heat exchanger, an opening degree of the expansion valve such that a superheat degree of the refrigerant whose flows are joined together after passing through the main heat exchange part and the auxiliary heat exchange part reaches a predetermined superheat degree;
上記熱源側熱交換器（40）の蒸発動作時に、上記主熱交換部（50）及び上記補助熱交換部（55）を通過して合流した冷媒が所定の過熱度になるように、上記膨張弁（33）の開度を制御する過熱度制御部（71）と、

a flow ratio adjustment mechanism configured to adjust, in the evaporation mode of the heat-source-side heat exchanger, a flow ratio between the refrigerant flowing through the main heat exchange part and the refrigerant flowing through the auxiliary heat exchange part; and
上記熱源側熱交換器（40）の蒸発動作時に、上記主熱交換部（50）に流れる冷媒と上記補助熱交換部（55）に流れる冷媒の流量比を調整する流量比調整機構（66,67）と、

a flow ratio controller configured to control the flow ratio adjustment mechanism such that a temperature of the refrigerant having passed through the main heat exchange part and a temperature of the refrigerant having passed through the auxiliary heat exchange part are substantially equal to each other."

上記主熱交換部（50）を通過した冷媒と上記補助熱交換部（55）を通過した冷媒の温度が略同じになるように、上記流量比調整機構（66）を制御する流量比制御部（72）とを備えている

ことを特徴とする冷凍装置。