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.