WO2022039703A1 - Cooling operation control method - Google Patents

Cooling operation control method Download PDF

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Publication number
WO2022039703A1
WO2022039703A1 PCT/TR2021/050818 TR2021050818W WO2022039703A1 WO 2022039703 A1 WO2022039703 A1 WO 2022039703A1 TR 2021050818 W TR2021050818 W TR 2021050818W WO 2022039703 A1 WO2022039703 A1 WO 2022039703A1
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WO
WIPO (PCT)
Prior art keywords
temperature
control member
coolant fluid
primary
ambience
Prior art date
Application number
PCT/TR2021/050818
Other languages
French (fr)
Inventor
Ayberk NUREL
Muharrem ÖZER
Original Assignee
Ottonom Mühendi̇sli̇k Çözümleri̇ Tasarim Otomasyon Danişmanlik Anoni̇m Şi̇rketi̇
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Ottonom Mühendi̇sli̇k Çözümleri̇ Tasarim Otomasyon Danişmanlik Anoni̇m Şi̇rketi̇ filed Critical Ottonom Mühendi̇sli̇k Çözümleri̇ Tasarim Otomasyon Danişmanlik Anoni̇m Şi̇rketi̇
Priority to EP21858734.3A priority Critical patent/EP4196730A1/en
Publication of WO2022039703A1 publication Critical patent/WO2022039703A1/en

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Classifications

    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
    • 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
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • 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
    • F25B2600/2519—On-off valves
    • 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
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/002—Test chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • Invention relates to a cooling operation control method providing broadening change range of temperature values in cooling systems, reduction in fluctuation in temperature during cooling operation or waiting, realization of temperature change at sensitive intervals.
  • climatic cabins or acclimatization cabins used in several industrial fields such as automotive, defence, aviation, space, food and white goods or used for testing reactions displayed by products under various physical conditions must have high temperature range between the highest and the lowest values.
  • fluctuations in ambience temperature value and non-sensitive, broad range temperature changes may occur due to stop of system operation and restarting during heating, cooling or keeping temperature constant made at such and similar systems.
  • Such case prevents accurate and sensitive performance of test procedures and also causes damage or failure of the tested product.
  • Patent document numbered DE3630886C1 in the related art discloses a climatic test chamber with a cooling unit.
  • Said system comprises load chamber convenient for placement of product to be tested, a heat exchanger providing heating or cooling of load chamber and an air circulation fan and heat able water chamber used as humidity source and a second heat exchanger dehumidifying the air.
  • Both said system uses heating and cooling of ambience inside load chamber and also humidification and dehumidification is provided by using more than one heat exchanger and a humidity source.
  • it does not disclose changing the highest and the lowest temperature limits of ambience and extending temperature range.
  • said system and operation method of the system do not provide decrease in fluctuations in temperature values and change of temperature sensitive ranges during change of ambience temperature and keeping it constant.
  • An another patent document numbered US20030172751 A1 of the related art discloses climatic test system comprising cooling unit and an operation method for such system.
  • Said system comprises more than one test chamber insulated from each other and providing testing of the products and a cooling unit providing cooling of each test chamber.
  • Said cooling unit comprises compressor, condenser, expansion valve and evaporator.
  • the system comprises circulation pump providing transmission of fluid in cold form, temperature control unit, transmission pipes providing transmission of fluid, control valve providing determination of transmission direction, resistive heating members located in each test chamber and providing heating of test chambers, fans and heat converters providing heat transfer.
  • said cooling unit and circulation pump provide transmission of fluid in cold form to each test chamber and provide cooling thereof, each test chamber temperature is measured by temperature control unit.
  • Resistive heating members provide increase of ambience temperature of test chambers by help of fans and heat converters. Thus different test samples are tested under different temperature values in close ambience wherein test samples are insulated from one another.
  • said document does not disclose a process step providing decreasing fluctuations in temperature values or sensitive adjustment of temperature changes during change of ambience temperature of test chambers or keeping it constant.
  • the present invention relates to a cooling operation control method meeting the needs mentioned above, eliminating potential disadvantages and providing some additional advantages.
  • Primary purpose of cooling operation control method of the invention is to achieve a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures and performance of temperature change operation in a sensitive way in systems providing cooling.
  • Another purpose of the invention is to achieve a cooling operation control system providing decrease of undesired changes in temperature value by means of providing prevention of fluctuations in temperature value during operations of cooling or keeping it constant performed in systems providing cooling.
  • a further purpose of the invention is to achieve a cooling operation control method providing performance of temperature change operation in a sensitive and efficient way and maintaining the changed temperature effectively.
  • the invention is a cooling system providing cooling of an ambience or an object and comprising at least a compressor, at least a condensing member, at least an evaporation member, at least a heat exchanging member, at least a temperature measuring member, more than one transmission member, at least a primary flow control member and at least a secondary flow control member, at least a primary expansion control member and at least a secondary expansion control member, and a cooling operation control method convenient for use comprising process steps of increasing primary temperature value and pressure value by compressing coolant fluid in gas form by means of compressor and transmission to condensing member by help of transmission members, bringing coolant fluid in gas form by means of condensing member through keeping pressure value constant and by help of heat transfer process to a secondary temperature value lower than primary temperature value, upon transmission to heat exchanging member by help of coolant fluid in liquid form, decreasing pressure value of coolant fluid and prevention of flow of fluid into compressor by means of heat exchange member.
  • it also comprises process steps of transmission of coolant fluid in liquid form with decreased pressure by means of bringing primary flow control member in close status and primary expansion control member to open status, to evaporation member, performance of cooling operation by means of absorbing heat energy inside ambience by evaporation member and transmission into coolant fluid and thus conversion of coolant fluid in liquid form into gas at primary temperature value and decreasing ambience temperature to primary cooling temperature, decrease of cooling operation rate to primary rate value by means of measurement of ambience temperature by temperature measurement member and bringing secondary flow control member and secondary expansion control member in close position to open position together with primary flow control member and primary expansion control member in open position, or increasing cooling operation rate to secondary speed value higher than primary speed value by means of bringing secondary flow control member and secondary expansion control member in open position into close position.
  • Said method also comprises steps of bringing secondary flow control member and secondary expansion control member into close position in case ambience temperature is measured higher than primary cooling temperature by means of temperature measurement member after completion of cooling operation, or bringing secondary flow control member and secondary expansion control member to open position in case ambience temperature is measured lower than primary cooling temperature and thus protection of ambience temperature constant without displaying instant changes, transmission of coolant fluid in gas form and at primary temperature value obtained from evaporation member to compressor for re-compression by help of transmission member, and repeating of above steps.
  • Figure 1 shows schematic view of cooling system convenient for use of cooling operation control method of the invention.
  • a cooling operation control method convenient for use with a cooling system providing cooling of an environment or an object and developed under this invention comprising at least a compressor (1) providing compression of coolant fluid, preferably R404a in gas form and transmission thereof into a different position, at least a condensing member (2), preferably a condenser, providing conversion of coolant fluid in gas form sent from compressor into liquid and decrease of temperature, at least an evaporation member (3) preferably an evaporator, providing conversion of liquid in liquid form received from condensing member (2) upon absorbing heat energy in ambience to be cooled, into gas form and decrease of ambience temperature, at least a heat exchange member (4), preferably an exchanger providing heat transfer between coolant fluid and a different fluid and providing change in temperature of coolant fluid, at least a temperature measurement member (5) providing measurement of temperature in ambience, more than one transmission member (6) having structure convenient for passing coolant fluid through it and helping transfer of members of coolant fluid belonging to the system, preferably in pipe structure, at least a primary flow control member (7a), preferably
  • Coolant fluid of a primary temperature value and in gas form is compressed by means of said compressor (1) pressure value is increased and thus it is provided to become in hot vapour. Then it is transmitted to condensing member (2) by help of transmission members (6) and therein bringing coolant fluid in gas form into a liquid form by keeping the pressure value constant and bringing it to a secondary temperature value that is lower than the primary temperature value using the heat transfer process.
  • cooling fluid in liquid form to heat exchanging member (4) by help of transmission members (6)
  • decreasing pressure value of coolant fluid after heat transfer is provided by means of heat exchange member (4).
  • Pressure value of coolant fluid in liquid form is adjusted for transmission into evaporation member (3) bringing primary flow control member (7a) in close status and primary expansion control member (8a) to open status is provided.
  • evaporation member (3) absorption of heat energy in the ambience and transmission thereof to coolant fluid is provided thus conversion of coolant fluid in liquid form into gas form at primary temperature value is provided.
  • cooling process is realized by decreasing ambience temperature to primary cooling temperature.
  • decrease of cooling operation rate to primary rate value by means of measurement of ambience temperature by temperature measurement member (5) and bringing secondary flow control member (7b) and secondary expansion control member (8b) in close position to open position together with primary flow control member (7a) and primary expansion control member (8a) in open position is provided.
  • Increase of cooling operation rate to secondary rate value higher than said primary rate value is provided by bringing secondary flow control member (7b) and secondary expansion control member (8b) in close position to open position.
  • ambience temperature is measured by temperature measurement member (5) and in case ambience temperature is bigger than primary cooling temperature, secondary flow control member (7b) and secondary expansion control member (8b) are brought into close position and thus ambience temperature is decreased again.
  • ambience temperature is lower than primary cooling temperature, secondary flow control member (7b) and secondary expansion control member (8b) are brought into open position and cooling rate is decreased.
  • coolant fluid in gas form and at primary temperature value obtained from said evaporation member (3) is transmitted to compressor (1) for re-compression by help of transmission member (6), and ambience coming is provided by repeating above steps in order.
  • said cooling operation control method convenient for use with a cooling system comprising at least a third flow control member (7c) connected to said transmission members (6), providing start of said coolant fluid transmission in open position and stopping thereof in close position, preferably a solenoid valve capable to be controlled by electric current and at least a third expansion control member (8c), preferably a thermostatic controlled expansion valve, providing start of transmission of said coolant fluid in open position and stopping thereof in close position, controlling quantity of coolant fluid passing through evaporation member (3) and controlling coolant fluid pressure value and comprises process steps of
  • an effective cooling operation control method providing decrease in fluctuations encountered in temperature value during processes of increasing temperature value change range efficiently, changing and maintaining ambience temperature and changing temperature at sensitive intervals, particularly in ambience conditioning and/or cooling providing systems such as climatic cabins or acclimatization cabins.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Temperature (AREA)
  • Control Of Heat Treatment Processes (AREA)

Abstract

The invention relates to a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures, reducing fluctuations in temperature value during change of ambience temperature and keeping it fixed operations and change of temperature at sensitive intervals at ambiences to be cooled.

Description

COOLING OPERATION CONTROL METHOD
TECHNICAL FIELD
Invention relates to a cooling operation control method providing broadening change range of temperature values in cooling systems, reduction in fluctuation in temperature during cooling operation or waiting, realization of temperature change at sensitive intervals.
The invention particularly relates to a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures, reducing fluctuations in temperature value during change of ambience temperature and keeping it fixed operations and change of temperature at sensitive intervals at ambience conditioning and/or cooling systems such as climatic cabins or acclimatization cabins.
PRESENT STATE OF THE ART
Various cooling systems are used to reduce temperature of an ambience and/or object. Particularly, house, vehicle, trade or industrial acclimatization systems are used to control temperature of close areas and to bring them to desired value. In addition, ambience conditioning and/or cooling systems are used for changing temperature value and keep it under control during material production or performance of chemical operations. Said cooling systems generally comprise compressor providing increase in gas pressure upon compressing gas, condenser providing decrease of temperature by means of conversion of gas into liquid form and evaporator absorbing heat in the ambience and providing evaporation of liquid in cold form and decrease in ambience temperature during that operation. In addition, most heating and cooling systems comprise heat exchanger providing heat transfer between two or more liquids. Change may occur in system cooling temperature subject to different system components used in the cooling systems and properties of coolant fluid.
Systems such as climatic cabins or acclimatization cabins used in several industrial fields such as automotive, defence, aviation, space, food and white goods or used for testing reactions displayed by products under various physical conditions must have high temperature range between the highest and the lowest values. However, fluctuations in ambience temperature value and non-sensitive, broad range temperature changes may occur due to stop of system operation and restarting during heating, cooling or keeping temperature constant made at such and similar systems. Such case prevents accurate and sensitive performance of test procedures and also causes damage or failure of the tested product. Patent document numbered DE3630886C1 in the related art discloses a climatic test chamber with a cooling unit. Said system comprises load chamber convenient for placement of product to be tested, a heat exchanger providing heating or cooling of load chamber and an air circulation fan and heat able water chamber used as humidity source and a second heat exchanger dehumidifying the air. Both said system uses heating and cooling of ambience inside load chamber and also humidification and dehumidification is provided by using more than one heat exchanger and a humidity source. However, it does not disclose changing the highest and the lowest temperature limits of ambience and extending temperature range. In addition, said system and operation method of the system do not provide decrease in fluctuations in temperature values and change of temperature sensitive ranges during change of ambience temperature and keeping it constant.
An another patent document numbered US20030172751 A1 of the related art discloses climatic test system comprising cooling unit and an operation method for such system. Said system comprises more than one test chamber insulated from each other and providing testing of the products and a cooling unit providing cooling of each test chamber. Said cooling unit comprises compressor, condenser, expansion valve and evaporator. In addition, the system comprises circulation pump providing transmission of fluid in cold form, temperature control unit, transmission pipes providing transmission of fluid, control valve providing determination of transmission direction, resistive heating members located in each test chamber and providing heating of test chambers, fans and heat converters providing heat transfer. In the operation method of said system, said cooling unit and circulation pump provide transmission of fluid in cold form to each test chamber and provide cooling thereof, each test chamber temperature is measured by temperature control unit. Resistive heating members provide increase of ambience temperature of test chambers by help of fans and heat converters. Thus different test samples are tested under different temperature values in close ambience wherein test samples are insulated from one another. However, said document does not disclose a process step providing decreasing fluctuations in temperature values or sensitive adjustment of temperature changes during change of ambience temperature of test chambers or keeping it constant.
As a result, there is a need for development of a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures and performance of temperature change operation in a sensitive way, providing prevention of fluctuations in temperature value during change of ambience temperature and keeping it fixed operations and providing decrease of undesired changes in temperature values. BRIEF DESCRIPTION OF THE INVENTION
The present invention relates to a cooling operation control method meeting the needs mentioned above, eliminating potential disadvantages and providing some additional advantages.
Primary purpose of cooling operation control method of the invention is to achieve a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures and performance of temperature change operation in a sensitive way in systems providing cooling.
Another purpose of the invention is to achieve a cooling operation control system providing decrease of undesired changes in temperature value by means of providing prevention of fluctuations in temperature value during operations of cooling or keeping it constant performed in systems providing cooling.
A further purpose of the invention is to achieve a cooling operation control method providing performance of temperature change operation in a sensitive and efficient way and maintaining the changed temperature effectively.
In order to achieve above mentioned purposes and likely to be inferred from detailed description, the invention is a cooling system providing cooling of an ambience or an object and comprising at least a compressor, at least a condensing member, at least an evaporation member, at least a heat exchanging member, at least a temperature measuring member, more than one transmission member, at least a primary flow control member and at least a secondary flow control member, at least a primary expansion control member and at least a secondary expansion control member, and a cooling operation control method convenient for use comprising process steps of increasing primary temperature value and pressure value by compressing coolant fluid in gas form by means of compressor and transmission to condensing member by help of transmission members, bringing coolant fluid in gas form by means of condensing member through keeping pressure value constant and by help of heat transfer process to a secondary temperature value lower than primary temperature value, upon transmission to heat exchanging member by help of coolant fluid in liquid form, decreasing pressure value of coolant fluid and prevention of flow of fluid into compressor by means of heat exchange member. In addition, it also comprises process steps of transmission of coolant fluid in liquid form with decreased pressure by means of bringing primary flow control member in close status and primary expansion control member to open status, to evaporation member, performance of cooling operation by means of absorbing heat energy inside ambience by evaporation member and transmission into coolant fluid and thus conversion of coolant fluid in liquid form into gas at primary temperature value and decreasing ambience temperature to primary cooling temperature, decrease of cooling operation rate to primary rate value by means of measurement of ambience temperature by temperature measurement member and bringing secondary flow control member and secondary expansion control member in close position to open position together with primary flow control member and primary expansion control member in open position, or increasing cooling operation rate to secondary speed value higher than primary speed value by means of bringing secondary flow control member and secondary expansion control member in open position into close position. Said method also comprises steps of bringing secondary flow control member and secondary expansion control member into close position in case ambience temperature is measured higher than primary cooling temperature by means of temperature measurement member after completion of cooling operation, or bringing secondary flow control member and secondary expansion control member to open position in case ambience temperature is measured lower than primary cooling temperature and thus protection of ambience temperature constant without displaying instant changes, transmission of coolant fluid in gas form and at primary temperature value obtained from evaporation member to compressor for re-compression by help of transmission member, and repeating of above steps.
BRIEF DESCRIPTION OF FIGURES
Figure 1 shows schematic view of cooling system convenient for use of cooling operation control method of the invention.
REFERENCE NUMBERS
1 . Compressor
2. Condensing member
3. Evaporation member
4. Heat exchange member
5. Temperature measurement member
6. Transmission member
7a. Primary flow control member
7b. Secondary flow control member
7c. Third flow control member
8a. Primary expansion control member
8b. Secondary expansion control member 8c. Third expansion control member
DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, novelty being subject of this invention has been disclosed solely for the purpose of better understanding of the subject and with samples described in a manner not causing any restrictive effect.
A cooling operation control method convenient for use with a cooling system providing cooling of an environment or an object and developed under this invention comprising at least a compressor (1) providing compression of coolant fluid, preferably R404a in gas form and transmission thereof into a different position, at least a condensing member (2), preferably a condenser, providing conversion of coolant fluid in gas form sent from compressor into liquid and decrease of temperature, at least an evaporation member (3) preferably an evaporator, providing conversion of liquid in liquid form received from condensing member (2) upon absorbing heat energy in ambience to be cooled, into gas form and decrease of ambience temperature, at least a heat exchange member (4), preferably an exchanger providing heat transfer between coolant fluid and a different fluid and providing change in temperature of coolant fluid, at least a temperature measurement member (5) providing measurement of temperature in ambience, more than one transmission member (6) having structure convenient for passing coolant fluid through it and helping transfer of members of coolant fluid belonging to the system, preferably in pipe structure, at least a primary flow control member (7a), preferably a solenoid valve controlled by electric current, having connection with transmission members (6), providing start of transmission of coolant fluid in open position and providing stop in a close position and at least a secondary control member (7b), at least a primary expansion control member (8a), preferably a thermostatic controlled expansion valve, providing start of coolant fluid transmission in open position and stop in close position, providing control of quantity of coolant fluid passing through evaporation member (3) and pressure value of coolant fluid, and at least a secondary expansion control member (8b), and comprising process steps of
- Increasing primary temperature value and pressure value by compressing coolant fluid in gas form by means of said compressor (1 ) and transmission to condensing member (2) by help of transmission members (6),
- bringing coolant fluid in gas form by means of said condensing member (2) through keeping pressure value constant and by help of heat transfer process to a secondary temperature value lower than primary temperature value,
- upon transmission of coolant fluid in liquid form to heat exchanging member (4) by help of transmission members (6), decreasing pressure value of coolant fluid and prevention of flow of fluid into compressor (1 ) by means of heat exchange member (4).
- transmission of coolant fluid in liquid form with decreased pressure by means of bringing primary flow control member (7a) in close status and primary expansion control member (8a) to open status, to evaporation member (3),
- performance of cooling operation by means of absorbing heat energy inside ambience by said evaporation member (3) and transmission into coolant fluid and thus conversion of coolant fluid in liquid form into gas at primary temperature value and decreasing ambience temperature to primary cooling temperature,
- decrease of cooling operation rate to primary rate value by means of measurement of ambience temperature by said temperature measurement member (5) and bringing secondary flow control member (7b) and secondary expansion control member (8b) in close position to open position together with primary flow control member (7a) and primary expansion control member (8a) in open position, or increasing cooling operation rate to secondary speed value higher than primary speed value by means of bringing secondary flow control member (7b)and secondary expansion control member (8b) in open position into close position,
- bringing secondary flow control member (7b) and secondary expansion control member (8b) into close position in case ambience temperature is measured higher than primary cooling temperature by means of temperature measurement member (5) after completion of cooling operation, or bringing secondary flow control member (7b) and secondary expansion control member (8b) to open position in case ambience temperature is measured lower than primary cooling temperature and thus protection of ambience temperature constant without displaying instant changes,
- transmission of coolant fluid in gas form and at primary temperature value obtained from said evaporation member (3) to compressor (1 ) for re-compression by help of transmission member (6), and repeating of above steps.
Working principle of invention is as follows:
Coolant fluid of a primary temperature value and in gas form is compressed by means of said compressor (1) pressure value is increased and thus it is provided to become in hot vapour. Then it is transmitted to condensing member (2) by help of transmission members (6) and therein bringing coolant fluid in gas form into a liquid form by keeping the pressure value constant and bringing it to a secondary temperature value that is lower than the primary temperature value using the heat transfer process. Upon transmission of coolant fluid in liquid form to heat exchanging member (4) by help of transmission members (6), decreasing pressure value of coolant fluid after heat transfer is provided by means of heat exchange member (4). During that period flow of excessive fluid into compressor (1 ) from evaporation member (3) is prevented and system protection is provided. Pressure value of coolant fluid in liquid form is adjusted for transmission into evaporation member (3) bringing primary flow control member (7a) in close status and primary expansion control member (8a) to open status is provided. By means of evaporation member (3) absorption of heat energy in the ambience and transmission thereof to coolant fluid is provided thus conversion of coolant fluid in liquid form into gas form at primary temperature value is provided. Thus cooling process is realized by decreasing ambience temperature to primary cooling temperature. In addition, decrease of cooling operation rate to primary rate value by means of measurement of ambience temperature by temperature measurement member (5) and bringing secondary flow control member (7b) and secondary expansion control member (8b) in close position to open position together with primary flow control member (7a) and primary expansion control member (8a) in open position is provided. Increase of cooling operation rate to secondary rate value higher than said primary rate value is provided by bringing secondary flow control member (7b) and secondary expansion control member (8b) in close position to open position. After completion of cooling operation, ambience temperature is measured by temperature measurement member (5) and in case ambience temperature is bigger than primary cooling temperature, secondary flow control member (7b) and secondary expansion control member (8b) are brought into close position and thus ambience temperature is decreased again. In case ambience temperature is lower than primary cooling temperature, secondary flow control member (7b) and secondary expansion control member (8b) are brought into open position and cooling rate is decreased. Thus instant ambience temperature value changes and changes in high differences is prevented and ambience cooling is maintained. Lastly, coolant fluid in gas form and at primary temperature value obtained from said evaporation member (3) is transmitted to compressor (1) for re-compression by help of transmission member (6), and ambience coming is provided by repeating above steps in order.
In a preferred application of the invention, said cooling operation control method convenient for use with a cooling system comprising at least a third flow control member (7c) connected to said transmission members (6), providing start of said coolant fluid transmission in open position and stopping thereof in close position, preferably a solenoid valve capable to be controlled by electric current and at least a third expansion control member (8c), preferably a thermostatic controlled expansion valve, providing start of transmission of said coolant fluid in open position and stopping thereof in close position, controlling quantity of coolant fluid passing through evaporation member (3) and controlling coolant fluid pressure value and comprises process steps of
- transmission of coolant fluid in liquid form with decreased pressure by means of bringing said secondary flow control member (7b) in close status and said secondary expansion control member (8b) to open status, to said evaporation member (3),
- performance of cooling operation by means of absorbing heat energy inside said ambience by said evaporation member (3) and transmission into said coolant fluid thus conversion of coolant fluid in liquid form into gas at primary temperature value and decreasing said ambience temperature to a secondary cooling temperature higher than said primary cooling temperature,
- decrease of cooling operation rate to a third rate value by means of measurement of ambience temperature by said temperature measurement member (5) and bringing secondary flow control member (7b) and secondary expansion control member (8b) in open position to close position together with secondary flow control member (7b) and said secondary expansion control member (8b) in open position and thus decreasing cooling operation rate to a third rate value lower than said primary rate value by means of bringing said third expansion control member (8c) to open position or maintaining temperature value by means of bringing said third flow control member (7c) and said third expansion control member (8c) in open position to close position, bringing said third flow control member (7c) and said third expansion control member (8c) in open position in case ambience temperature is measured higher than said primary cooling temperature measured by means of said temperature measurement member (5) after completion of cooling operation or maintaining ambience temperature without allowing any prompt changes by bringing said third flow control member (7c) and said third expansion control member (8c) into close position in case ambience temperature is measured lower than said primary cooling temperature.
By help of cooling operation control method developed under present invention, an effective cooling operation control method providing decrease in fluctuations encountered in temperature value during processes of increasing temperature value change range efficiently, changing and maintaining ambience temperature and changing temperature at sensitive intervals, particularly in ambience conditioning and/or cooling providing systems such as climatic cabins or acclimatization cabins.

Claims

9
CLAIMS A cooling operation control method convenient for use with a cooling system providing cooling of an environment or an object and developed under this invention comprising at least a compressor (1) providing compression of coolant fluid in gas form and transmission thereof from said compressor into a different position, at least a condensing member (2), providing conversion of coolant fluid in gas form sent from compressor into liquid and decrease of temperature, at least an evaporation member (3) , providing conversion of liquid in liquid form received from condensing member
(2) upon absorbing heat energy in ambience to be cooled, into gas form and decrease of ambience temperature, at least a heat exchange member (4), providing heat transfer between said coolant fluid and a different fluid and providing change in temperature of said coolant fluid, at least a temperature measurement member (5) providing measurement of temperature in ambience, more than one transmission member (6) having structure convenient for passing said coolant fluid through it and helping transfer of members of said coolant fluid belonging to the system, at least a primary flow control member (7a), having connection with transmission members (6), providing start of transmission of coolant fluid in open position and providing stop in a close position and at least a secondary control member (7b), at least a primary expansion control member (8a), providing start of coolant fluid transmission in open position and stop in close position, providing control of quantity of coolant fluid passing through evaporation member
(3) and pressure value of coolant fluid, and at least a secondary expansion control member (8b), and characterized by comprising process steps of
- Increasing primary temperature value and pressure value by compressing coolant fluid in gas form by means of said compressor (1) and transmission to said condensing member (2) by help of said transmission members (6),
- bringing coolant fluid in gas form into liquid form by means of said condensing member (2) through keeping pressure value constant and by help of heat transfer process to a secondary temperature value lower than said primary temperature value,
- upon transmission of coolant fluid in liquid form to heat exchanging member (4) by help of said transmission members (6), decreasing pressure value of coolant fluid and prevention of flow of fluid into said compressor (1) by means of said heat exchange member
(4). - transmission of coolant fluid in liquid form with decreased pressure by means of bringing said primary flow control member (7a) in close status and said primary expansion control member (8a) to open status, to said evaporation member (3),
- performance of cooling operation by means of absorbing heat energy inside ambience by said evaporation member (3) and transmission into coolant fluid thus conversion of coolant fluid in liquid form into gas at said primary temperature value and decreasing said ambience temperature to said primary cooling temperature,
- decrease of cooling operation rate to said primary rate value by means of measurement of ambience temperature change by said temperature measurement member (5) and bringing said secondary flow control member (7b) and said secondary expansion control member (8b) in close position to open position together with said primary flow control member (7a) and said primary expansion control member (8a) in open position, or increasing cooling operation rate to said secondary speed value higher than primary speed value by means of bringing said secondary flow control member (7b)and said secondary expansion control member (8b) in open position into close position,
- bringing said secondary flow control member (7b) and said secondary expansion control member (8b) into close position in case said ambience temperature is measured higher than said primary cooling temperature by means of said temperature measurement member (5) after completion of cooling operation, or bringing said secondary flow control member (7b) and said secondary expansion control member (8b)to open position in case said ambience temperature is measured lower than said primary cooling temperature thus protection of ambience temperature constant without displaying instant changes,
- transmission of coolant fluid in gas form and at said primary temperature value obtained from said evaporation member (3) to said compressor (1) for re-compression by help of said transmission member (6) and repeating of above steps. A cooling operation control method according to claim 1 and characterized by said cooling fluid being R404 type coolant fluid. A cooling operation control method according to claim 1 and characterized by said condensing member (2) being a condenser.
A cooling operation control method according to claim 1 and characterized by said evaporation member (3) being an evaporator.
5. A cooling operation control method according to claim 1 and characterized by said heat exchanging member (4) being an exchanger.
A cooling operation control method according to claim 1 and characterized by said transmission members (6) being of pipe structure.
A cooling operation control method according to claim 1 and characterized by said primary flow control member (7a) being a solenoid valve controlled by electric current.
8. A cooling operation control method according to claim 1 and characterized by said primary expansion control member (8a) being an expansion valve of thermostatic control feature.
9. A cooling operation control method according to claim 1 and characterized by said secondary flow control member (7b) being a solenoid valve controlled by electric current.
10. A cooling operation control method according to claim 1 and characterized by said secondary expansion control member (8b) being an expansion valve of thermostatic control feature.
11. A cooling operation control method according to any one of above claims and convenient for use with a cooling system comprising at least a third flow control member (7c) connected to said transmission members (6), providing start of said coolant fluid transmission in open position and stopping thereof in close position, preferably a solenoid valve capable to be controlled by electric current and at least a third expansion control member (8c), preferably a thermostatic controlled expansion valve, providing start of transmission of said coolant fluid in open position and stopping thereof in close position, controlling quantity of coolant fluid passing through evaporation member (3) and controlling coolant fluid pressure value and characterized by comprising process steps of :
- transmission of coolant fluid in liquid form with decreased pressure by means of bringing said secondary flow control member (7b) in close status and said secondary expansion control member (8b) to open status, to said evaporation member (3), 12
- performance of cooling operation by means of absorbing heat energy inside said ambience by said evaporation member (3) and transmission into said coolant fluid thus conversion of coolant fluid in liquid form into gas at primary temperature value and decreasing said ambience temperature to a secondary cooling temperature higher than said primary cooling temperature,
- decrease of cooling operation rate to a third rate value lower than said primary rate by means of measurement of ambience temperature change by said temperature measurement member (5) and bringing secondary flow control member (7b) and secondary expansion control member (8b) in open position to close position together with bringing said third flow control member (7c) and said third expansion control member (8c) in close position to open position or maintaining temperature value by means of bringing said third flow control member (7c) and said third expansion control member (8c) in open position to close position, bringing said third flow control member (7c) and said third expansion control member (8c) in close position in case ambience temperature is measured higher than said primary cooling temperature measured by means of said temperature measurement member (5) after completion of cooling operation or maintaining ambience temperature without allowing any prompt changes by bringing said third flow control member (7c) and said third expansion control member (8c) into open position in case ambience temperature is measured lower than said primary cooling temperature.
PCT/TR2021/050818 2020-08-21 2021-08-16 Cooling operation control method WO2022039703A1 (en)

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TR2020/13273A TR202013273A2 (en) 2020-08-21 2020-08-21 COOLING PROCESS CONTROL METHOD

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226472A (en) * 1991-11-15 1993-07-13 Lab-Line Instruments, Inc. Modulated temperature control for environmental chamber
WO2003085334A1 (en) * 2002-02-28 2003-10-16 Kefang You Improvement for multi-coupled heat pump system
CN105972849A (en) * 2016-03-25 2016-09-28 合肥天鹅制冷科技有限公司 Wide temperature range cooling liquid supply system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226472A (en) * 1991-11-15 1993-07-13 Lab-Line Instruments, Inc. Modulated temperature control for environmental chamber
WO2003085334A1 (en) * 2002-02-28 2003-10-16 Kefang You Improvement for multi-coupled heat pump system
CN105972849A (en) * 2016-03-25 2016-09-28 合肥天鹅制冷科技有限公司 Wide temperature range cooling liquid supply system

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