WO2019207619A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2019207619A1 WO2019207619A1 PCT/JP2018/016420 JP2018016420W WO2019207619A1 WO 2019207619 A1 WO2019207619 A1 WO 2019207619A1 JP 2018016420 W JP2018016420 W JP 2018016420W WO 2019207619 A1 WO2019207619 A1 WO 2019207619A1
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- WIPO (PCT)
- Prior art keywords
- expansion valve
- range
- refrigerant
- opening
- evaporator
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/18—Optimization, e.g. high integration of refrigeration components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/197—Pressures of the evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator
Definitions
- the present invention relates to a refrigeration cycle apparatus including an expansion valve control unit that adjusts the opening of an expansion valve.
- controllable opening range includes the use ranges of a plurality of types of refrigerants (see, for example, Patent Document 1).
- type of refrigerant is automatically determined based on the discharge superheat degree and the suction superheat degree during the trial operation.
- the refrigeration capacity of the evaporator to which the expansion valve is applied is changed even with one type of refrigerant.
- the opening degree of the expansion valve outside the proper use range of the capacity of the evaporator is output. If an expansion valve opening that exceeds the capacity range of the evaporator is output, a liquid back operation occurs, which may cause a compressor failure. Moreover, if the opening degree of the expansion valve less than the capacity of the evaporator is output, the compressor inlet temperature rises, overheating operation may occur, and the compressor may break down.
- the present invention is for solving the above-mentioned problem, and an appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the type of refrigerant used and the refrigeration capacity of the evaporator to which the expansion valve is applied.
- An object of the present invention is to provide a refrigeration cycle apparatus in which a liquid back operation or an overheating operation does not occur, and a compressor failure can be suppressed.
- a refrigeration cycle apparatus includes a refrigerant circuit in which refrigerant piping is connected in the order of a compressor, a condenser, an expansion valve, and an evaporator, and an expansion valve control unit that adjusts an opening degree of the expansion valve,
- the expansion valve control unit stores a first table defining a relationship between the refrigeration capacity obtained by quantifying the evaporator capacity range and a plurality of types of refrigerants and the expansion valve opening, and the refrigerant used is determined based on the first table. The appropriate use range from the upper limit to the lower limit of the corresponding expansion valve opening is determined.
- the expansion valve control unit stores the first table that defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between the plurality of types of refrigerant and the expansion valve opening, Based on the first table, an appropriate use range from the upper limit to the lower limit of the expansion valve opening degree according to the refrigerant to be used is determined. Therefore, an appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the type of refrigerant used and the refrigerating capacity of the evaporator to which the expansion valve is applied can be determined, and liquid back operation or overheating operation is prevented. , Compressor failure can be suppressed.
- FIG. 1 is a refrigerant circuit diagram showing a refrigeration cycle apparatus 100 according to Embodiment 1 of the present invention.
- the refrigeration cycle apparatus 100 includes a compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4.
- the compressor 1, the condenser 2, the expansion valve 3, and the evaporator 4 are connected in order through a refrigerant pipe to form a refrigerant circuit.
- coolant which flowed out from the evaporator 4 is suck
- the high-temperature and high-pressure refrigerant is condensed in the condenser 2 to become a liquid.
- the refrigerant that has become liquid is decompressed and expanded by the expansion valve 3 to become a low-temperature and low-pressure gas-liquid two-phase, and the gas-liquid two-phase refrigerant is heat-exchanged in the evaporator 4.
- examples of the refrigeration cycle apparatus 100 include an air conditioner, a refrigeration apparatus, and a water heater.
- the expansion valve 3 is a flow control valve, and expands the refrigerant by depressurizing it.
- the expansion valve 3 is configured as an electronic expansion valve.
- the expansion valve 3 includes an expansion valve control unit 5 integrally.
- the expansion valve 3 can communicate with the expansion valve control unit 5 via a wired or wireless communication line 6 and can adjust the opening degree based on an instruction from the expansion valve control unit 5.
- FIG. 2 is a block diagram showing a configuration of the expansion valve control unit according to Embodiment 1 of the present invention.
- FIG. 3 is a functional block diagram showing functions of the expansion valve control unit 5 according to Embodiment 1 of the present invention.
- the expansion valve control unit 5 can appropriately control the opening degree of the expansion valve 3 during the operation of the refrigeration cycle apparatus 100 according to the operation state.
- the expansion valve control unit 5 is a processing circuit having a microcomputer including a CPU, a memory such as a ROM and a RAM, and an input / output device such as an I / O port.
- the expansion valve control unit 5 is configured as a processing circuit having an input unit 5a, a storage unit 5b, a range determination unit 5c, an opening determination unit 5d, and a control unit 5e. Yes.
- the setter inputs the usage, horsepower, and refrigerant of the refrigeration cycle apparatus 100 used as usage information.
- usage information may be input by a switch included in the input unit 5a, or may be input by a communication line or a connected storage medium.
- the storage unit 5b is configured by a storage medium such as a ROM, a RAM, and a flash memory.
- the storage unit 5b stores a first table and a second table.
- FIG. 4 is an explanatory diagram showing a first table according to Embodiment 1 of the present invention.
- the first table defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between a plurality of types of refrigerants and the expansion valve opening. That is, the appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the refrigerant to be used can be determined by comparing the refrigerant to be used and the refrigerating capacity in the first table.
- FIG. 5 is an explanatory diagram showing the second table according to Embodiment 1 of the present invention.
- the second table defines the application and the relationship between horsepower and evaporator capacity range. That is, the usage and horsepower input by the setter are collated in the second table, so that the evaporator capacity range corresponding to the usage and horsepower to be used can be determined.
- the range determination unit 5c performs a process of determining an evaporator capacity range according to the input and horsepower input by collating the application and horsepower input to the input unit 5a with the second table. As shown in FIG. 5, it is assumed that the input use is for refrigeration among refrigeration and freezing, and horsepower is 10. In this case, the range determination unit 5c substitutes these pieces of information for each value in the second table.
- the second table has a field of use on the vertical axis and a field of horsepower on the horizontal axis. Therefore, when an application and horsepower are input, the upper limit of the capacity of the evaporator capacity is determined to be 25.0, and the lower limit of the capacity is determined to be 10.0 as in the shaded intersection.
- the opening degree determination unit 5d compares the evaporator capacity range determined by the range determination unit 5c and the refrigerant input to the input unit 5a against the first table from the upper limit to the lower limit of the expansion valve opening degree according to the refrigerant to be used. Implement a process to determine the appropriate range of use.
- FIG. 6 is an explanatory diagram showing a state in which an appropriate usage range is determined using the first table according to Embodiment 1 of the present invention.
- the opening degree determination unit 5d includes an upper capacity limit of 25.0 and a lower capacity limit of 10.0, which are evaporator capacity ranges determined by the range determination unit 5c, and R410A as a refrigerant to be used.
- the first table has a scale of refrigeration capacity in which the evaporator capacity range is digitized on the vertical axis, and a scale of the expansion valve opening on the horizontal axis.
- coolant is mounted on the 1st table.
- the evaporator capacity range with respect to the characteristic line of R410A as in the shaded portion is obtained. Determined.
- an appropriate use range from the upper limit to the lower limit of the expansion valve opening is determined.
- the proper usage range of R410A is determined to be 800 MAX opening and 450 MIN opening as shown in FIG.
- the control unit 5e performs a process of controlling the opening of the expansion valve 3 within the proper use range of the expansion valve opening determined by the opening determining unit 5d. That is, the control unit 5e controls the opening of the expansion valve 3 within an appropriate usage range from the upper limit to the lower limit of the expansion valve opening determined by the opening determination unit 5d. Control so as not to
- FIG. 7 is an explanatory diagram showing an appropriate usage range after being determined by the opening degree determination unit 5d according to Embodiment 1 of the present invention.
- the proper use range of R410A is determined by the MAX opening of 800 and the MIN opening of 450 by the opening determining unit 5d.
- These values in FIG. 7 are stored in the storage unit 5b.
- the control part 5e controls the opening degree of the expansion valve 3 between the MAX opening degree of 800 and the MIN opening degree of 450. Details of the control of the expansion valve opening of the control unit 5e according to the operating state of the refrigeration cycle apparatus 100 are omitted.
- the control unit 5e uses the table of FIG. 7 which has been previously stored in the storage unit 5b in the normal operation of the refrigeration cycle apparatus 100 and previously stores the maximum opening of 800 and the MIN opening of 450. In between, the opening degree of the expansion valve 3 is controlled.
- FIG. 8 is a flowchart showing an expansion valve opening determination control routine by the expansion valve control unit 5 according to Embodiment 1 of the present invention. The routine shown in FIG. 8 is performed when the refrigeration cycle apparatus 100 is initially operated or reset.
- This routine starts when the refrigeration cycle apparatus 100 is first operated or reset.
- step S101 the input unit 5a of the expansion valve control unit 5 determines whether or not a use, a horsepower, and a refrigerant have been input. If it is determined in step S101 that the application, horsepower, and refrigerant have been input, the process proceeds to step S102. In step S101, when the application, horsepower, and refrigerant are not input, this routine is temporarily terminated.
- step S102 the range determination unit 5c of the expansion valve control unit 5 determines the evaporator capacity range using the second table stored in the storage unit 5b from the application and horsepower. Details are as described in the above-described range determination unit 5c.
- step S102 ends, the process proceeds to step S103.
- step S103 the opening degree determination unit 5d of the expansion valve control unit 5 uses the first table stored in the storage unit 5b from the refrigerant to be used and the evaporator capacity range as the refrigeration capacity determined in step S102. Determine the appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the refrigerant used. Details are as described for the opening degree determination unit 5d.
- step S104 the process proceeds to step S104.
- step S104 the control unit 5e of the expansion valve control unit 5 controls the opening of the expansion valve 3 within an appropriate usage range from the upper limit to the lower limit of the expansion valve opening corresponding to the refrigerant to be used.
- the details are as described for the control unit 5e.
- the control unit 5e of the expansion valve control unit 5 previously executes this routine and stores the same as in step S104.
- the opening degree of the expansion valve 3 is controlled within an appropriate use range from the upper limit to the lower limit of the expansion valve opening degree corresponding to the refrigerant to be used stored in the part 5b.
- the refrigeration cycle apparatus 100 includes a pressure sensor and a temperature sensor between the evaporator outlet and the compressor 1.
- the pressure sensor may be replaced with an evaporator inlet temperature sensor.
- the control unit 5e of the expansion valve control unit 5 may correct the expansion valve opening range. good. Specifically, the control unit 5e of the expansion valve control unit 5 adjusts the value of the MIN opening by 1.05 when the value of the refrigerant superheat degree at the outlet of the evaporator is larger than a predetermined range. .
- control unit 5e of the expansion valve control unit 5 performs adjustment to increase the value of the MAX opening degree by 0.95 when the value of the refrigerant superheat degree at the outlet of the evaporator is smaller than a predetermined range.
- the controller 5e of the expansion valve controller 5 repeats these adjustments until the value of the refrigerant superheat degree at the evaporator outlet falls within a predetermined range.
- the refrigeration cycle apparatus 100 includes a refrigerant circuit in which refrigerant piping is connected in the order of the compressor 1, the condenser 2, the expansion valve 3, and the evaporator 4.
- the refrigeration cycle apparatus 100 includes an expansion valve control unit 5 that adjusts the opening degree of the expansion valve 3.
- the expansion valve control unit 5 stores a first table that defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between a plurality of types of refrigerants and the expansion valve opening, and the refrigerant used is determined based on the first table. The appropriate use range from the upper limit to the lower limit of the corresponding expansion valve opening is determined.
- the first table defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between the plurality of types of refrigerants and the expansion valve opening.
- the expansion valve control unit 5 stores a second table that defines the application and the relationship between the horsepower and the evaporator capacity range, and based on the input application and the horsepower based on the second table. Configured to determine the evaporator capacity range.
- the second table defines the application and the relationship between horsepower and evaporator capacity range.
- the expansion valve control unit 5 is configured to control the opening degree of the expansion valve 3 within the proper use range of the determined expansion valve opening degree.
- the opening degree of the expansion valve 3 is controlled within an appropriate use range from the upper limit to the lower limit of the expansion valve opening degree determined by the expansion valve control unit 5. For this reason, the expansion valve opening degree is not controlled outside the proper use range from the upper limit to the lower limit. Thereby, even when an abnormality occurs in the detection of the temperature sensor at the outlet of the evaporator, the opening degree of the expansion valve outside the proper use range of the ability of the evaporator 4 is not output. Therefore, the liquid back operation or the overheating operation is prevented, and the failure of the compressor 1 can be suppressed.
- the expansion valve control unit 5 uses the input unit 5a for inputting usage information, the storage unit 5b for storing the first table, and the usage information input to the input unit 5a in the first table.
- An opening determining unit 5d that collates and determines an appropriate use range of the expansion valve opening; and a control unit 5e that controls the opening of the expansion valve 3 within the determined appropriate use range of the expansion valve opening. Includes processing circuitry.
- the first table defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between the plurality of types of refrigerants and the expansion valve opening.
- the opening degree of the expansion valve outside the proper use range of the ability of the evaporator 4 is not output.
- an appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the type of refrigerant used and the refrigeration capacity of the evaporator 4 to which the expansion valve 3 is applied can be determined, and liquid back operation or overheating can be determined. Operation is prevented and the failure of the compressor 1 can be suppressed.
- the storage unit 5b stores the second table.
- the expansion valve control unit 5 has a range determination unit 5c that determines the evaporator capacity range by comparing the usage information input to the input unit 5a with the second table in the processing circuit.
- the second table defines the application and the relationship between horsepower and evaporator capacity range.
- the use and horsepower input by the setter as use information are collated in the second table, whereby the evaporator capacity range corresponding to the use and horsepower used can be determined. Therefore, the setter can determine the evaporator capacity range from the application to be used and the horsepower without knowing the refrigeration capacity obtained by quantifying the evaporator capacity range.
- the usage information is a use, a horsepower, and a refrigerant used for the refrigeration cycle apparatus 100.
- the appropriate usage range from the upper limit to the lower limit of the expansion valve opening according to the usage, horsepower and refrigerant is determined. It can. Therefore, even when an abnormality occurs in the detection of the temperature sensor at the outlet of the evaporator, the opening degree of the expansion valve outside the proper use range of the ability of the evaporator 4 is not output. Therefore, the liquid back operation or the overheating operation is prevented, and the failure of the compressor 1 can be suppressed.
- the expansion valve control unit 5 includes an application unit to be used, an input unit 5a for inputting horsepower and a refrigerant, a refrigerating capacity in which an evaporator capacity range is quantified, and a plurality of types of refrigerants and an expansion valve opening degree.
- a storage table 5b storing a first table that defines a relationship between the first table and a second table that defines a relationship between the application and horsepower and the evaporator capacity range;
- the range determination unit 5c that determines the evaporator capacity range according to the application and horsepower input in comparison with the above, the evaporator capacity range determined by the range determination unit 5c, and the refrigerant that is input to the input unit 5a are the first.
- An opening degree determination unit 5d that determines an appropriate use range from the upper limit to the lower limit of the expansion valve opening degree according to the refrigerant to be used in comparison with the table, and the expansion valve 3 within the determined appropriate use range of the expansion valve opening degree.
- the second table defines the application and the relationship between horsepower and evaporator capacity range. By comparing the use and horsepower input by the setter in the second table, the evaporator capacity range corresponding to the use and horsepower used can be determined.
- the first table defines the refrigeration capacity obtained by quantifying the evaporator capacity range and the relationship between a plurality of types of refrigerant and the expansion valve opening. By collating the refrigerant to be used and the refrigerating capacity in the first table, an appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the refrigerant to be used can be determined.
- the opening degree of the expansion valve 3 is controlled within an appropriate use range from the upper limit to the lower limit of the expansion valve opening degree determined by the expansion valve control unit 5. For this reason, the expansion valve opening degree is not controlled outside the proper use range from the upper limit to the lower limit. Thereby, even when an abnormality occurs in the detection of the temperature sensor at the outlet of the evaporator, the opening degree of the expansion valve outside the proper use range of the ability of the evaporator 4 is not output. In this way, an appropriate use range from the upper limit to the lower limit of the expansion valve opening according to the type of refrigerant used and the refrigeration capacity of the evaporator 4 to which the expansion valve 3 is applied can be determined, and liquid back operation or overheating can be determined. Operation is prevented and the failure of the compressor 1 can be suppressed.
- the expansion valve 3 is an electronic expansion valve in which the expansion valve control unit 5 is integrated.
- the expansion valve 3 is an electronic expansion valve in which the expansion valve control unit 5 is integrated, there are no extra parts in the refrigeration cycle apparatus 100, and the number of parts does not increase. Note that the expansion valve 3 and the expansion valve control unit 5 are not necessarily integrated.
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
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- Air Conditioning Control Device (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
<冷凍サイクル装置100>
図1は、本発明の実施の形態1に係る冷凍サイクル装置100を示す冷媒回路図である。
図2は、本発明の実施の形態1に係る膨張弁制御部の構成を示すブロック図である。図3は、本発明の実施の形態1に係る膨張弁制御部5の機能を示す機能ブロック図である。なお、ここでは、膨張弁制御部5の機能のうち、後述する実施の形態1の特徴である膨張弁3の開度を適正使用範囲に決定する機能を説明する。膨張弁制御部5は、その他の機能として、冷凍サイクル装置100の運転時の膨張弁3の開度などを運転状況に応じて適宜制御できる。
図8は、本発明の実施の形態1に係る膨張弁制御部5による膨張弁開度決定制御ルーチンを示すフローチャートである。図8に示すルーチンは、冷凍サイクル装置100の初運転時又はリセット時などに実施される。
冷凍サイクル装置100は、蒸発器出口から圧縮機1までの間に、圧力センサ及び温度センサを備える。なお、圧力センサは、蒸発器入口温度センサで代用しても良い。そして、蒸発器出口の冷媒過熱度の値が所定の範囲外となる状態が継続して発生した場合に、膨張弁制御部5の制御部5eは、膨張弁開度範囲の補正を行っても良い。具体的には、膨張弁制御部5の制御部5eは、蒸発器出口の冷媒過熱度の値が所定の範囲よりも大きい場合には、MIN開度の値を1.05倍する調整を行う。また、膨張弁制御部5の制御部5eは、蒸発器出口の冷媒過熱度の値が所定の範囲よりも小さい場合には、MAX開度の値を0.95倍する調整を行う。膨張弁制御部5の制御部5eは、これらの調整を蒸発器出口の冷媒過熱度の値が所定の範囲に収まるまで繰り返し行う。
実施の形態1によれば、冷凍サイクル装置100は、圧縮機1、凝縮器2、膨張弁3及び蒸発器4の順に冷媒配管を接続した冷媒回路を備える。冷凍サイクル装置100は、膨張弁3の開度を調節する膨張弁制御部5を備える。膨張弁制御部5は、蒸発器能力範囲を数値化した冷凍能力及び複数種類の冷媒と膨張弁開度との関係を定義した第1テーブルを記憶し、第1テーブルに基づき、使用する冷媒に応じた膨張弁開度の上限から下限までの適正使用範囲を決定するように構成されている。
Claims (8)
- 圧縮機、凝縮器、膨張弁及び蒸発器の順に冷媒配管を接続した冷媒回路と、
前記膨張弁の開度を調節する膨張弁制御部と、
を備え、
前記膨張弁制御部は、蒸発器能力範囲を数値化した冷凍能力及び複数種類の冷媒と膨張弁開度との関係を定義した第1テーブルを記憶し、前記第1テーブルに基づき、使用する冷媒に応じた前記膨張弁開度の上限から下限までの適正使用範囲を決定するように構成された冷凍サイクル装置。 - 前記膨張弁制御部は、用途及び馬力と前記蒸発器能力範囲との関係を定義した第2テーブルを記憶し、前記第2テーブルに基づき、入力された用途及び馬力に応じた前記蒸発器能力範囲を決定するように構成された請求項1に記載の冷凍サイクル装置。
- 前記膨張弁制御部は、決定された前記膨張弁開度の前記適正使用範囲内で前記膨張弁の開度を制御するように構成された請求項1又は2に記載の冷凍サイクル装置。
- 前記膨張弁制御部は、
使用情報を入力する入力部と、
前記第1テーブルを記憶した記憶部と、
前記入力部に入力された前記使用情報を前記第1テーブルに照合して前記膨張弁開度の前記適正使用範囲を決定する開度決定部と、
決定された前記膨張弁開度の前記適正使用範囲内で前記膨張弁の開度を制御する制御部と、
を有する処理回路を含む請求項1~3のいずれか1項に記載の冷凍サイクル装置。 - 前記記憶部は、前記第2テーブルを記憶し、
前記膨張弁制御部は、前記処理回路に、前記入力部に入力された前記使用情報を前記第2テーブルに照合して前記蒸発器能力範囲を決定する範囲決定部を有する請求項4に記載の冷凍サイクル装置。 - 前記使用情報は、冷凍サイクル装置に使用する用途、馬力及び冷媒である請求項4又は5に記載の冷凍サイクル装置。
- 前記膨張弁制御部は、
使用する用途、馬力及び冷媒を入力する入力部と、
前記蒸発器能力範囲を数値化した冷凍能力及び複数種類の冷媒と膨張弁開度との関係を定義した第1テーブル、並びに用途及び馬力と前記蒸発器能力範囲との関係を定義した第2テーブルを記憶した記憶部と、
前記入力部に入力された用途及び馬力を前記第2テーブルに照合して入力された用途及び馬力に応じた前記蒸発器能力範囲を決定する範囲決定部と、
前記範囲決定部が決定した蒸発器能力範囲と前記入力部に入力された冷媒とを前記第1テーブルに照合して使用する冷媒に応じた前記膨張弁開度の上限から下限までの前記適正使用範囲を決定する開度決定部と、
決定された前記膨張弁開度の前記適正使用範囲内で前記膨張弁の開度を制御する制御部と、
を有する処理回路を含む請求項1に記載の冷凍サイクル装置。 - 前記膨張弁は、前記膨張弁制御部を一体化した電子式膨張弁である請求項1~7のいずれか1項に記載の冷凍サイクル装置。
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Citations (6)
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JPH07190535A (ja) * | 1993-12-27 | 1995-07-28 | Toshiba Corp | 冷凍サイクル制御装置 |
JPH09229495A (ja) * | 1996-02-26 | 1997-09-05 | Saginomiya Seisakusho Inc | 電動膨張弁の制御装置及び制御方法 |
JP2015117853A (ja) * | 2013-12-17 | 2015-06-25 | 株式会社富士通ゼネラル | 空気調和装置 |
JP2015132434A (ja) * | 2014-01-15 | 2015-07-23 | 日立アプライアンス株式会社 | 冷凍サイクル装置 |
JP2017141998A (ja) * | 2016-02-08 | 2017-08-17 | 日立ジョンソンコントロールズ空調株式会社 | 空気調和機用のユニット機構、及びこれを備えた空気調和機 |
JP2017161128A (ja) * | 2016-03-08 | 2017-09-14 | パナソニックIpマネジメント株式会社 | 複数の冷凍・冷蔵機器の管理装置 |
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JPH07190535A (ja) * | 1993-12-27 | 1995-07-28 | Toshiba Corp | 冷凍サイクル制御装置 |
JPH09229495A (ja) * | 1996-02-26 | 1997-09-05 | Saginomiya Seisakusho Inc | 電動膨張弁の制御装置及び制御方法 |
JP2015117853A (ja) * | 2013-12-17 | 2015-06-25 | 株式会社富士通ゼネラル | 空気調和装置 |
JP2015132434A (ja) * | 2014-01-15 | 2015-07-23 | 日立アプライアンス株式会社 | 冷凍サイクル装置 |
JP2017141998A (ja) * | 2016-02-08 | 2017-08-17 | 日立ジョンソンコントロールズ空調株式会社 | 空気調和機用のユニット機構、及びこれを備えた空気調和機 |
JP2017161128A (ja) * | 2016-03-08 | 2017-09-14 | パナソニックIpマネジメント株式会社 | 複数の冷凍・冷蔵機器の管理装置 |
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