KR102096594B1 - Air cooling system to constant temperature - Google Patents

Abstract

The present invention provides a system for cooling air at a constant temperature which rapidly and correctly corrects the temperature of a coolant in real time to flexibly cope with a work environment, in which an air usage amount is irregular, such that air with high quality maintained at a constant temperature without temperature variation can be provided. The system for cooling air at a constant temperature comprises: a rapid cooling heat exchange unit (10) provided to cool air by using a coolant circulation cycle using a compressor (1); a constant temperature heat exchange unit (20) provided to maintain the air at a constant temperature by using a low temperature and low pressure gas coolant having passed through the rapid cooling heat exchange unit (10) in a state of storing and retaining the air cooled by the first heat exchange unit (10); a rapid cooling controller (30) provided to control the temperature of a low temperature and low pressure liquid coolant which moves to the rapid cooling heat exchange unit (10); and a constant temperature controller (40) provided to control the temperature of the low temperature and low pressure gas coolant supplied to the constant temperature heat exchange unit (20). The system for cooling air at the constant temperature, if used, rapidly and correctly corrects the temperature of the coolant in real time, which is supplied to the rapid cooling heat exchange unit and the constant temperature heat exchange unit by using a high temperature coolant output from the compressor, thereby flexibly coping with the work environment, in which the air usage amount is irregular, to supply the air with high quality maintained at the constant temperature without temperature variation.

Description

Air cooling system to constant temperature}

The present invention relates to an air constant temperature cooling system, which is described in more detail, wherein the coolant temperature is quickly and accurately corrected in real time to provide high quality air maintained at constant temperature (constant temperature).

Normally, high pressure and low temperature air is widely used for driving or controlling equipment, etc. in various factory facilities or production facilities such as plasma display panels, but the defect rate in the manufacturing process is high due to moisture contained in high pressure and low temperature air, and various facilities It is the situation that causes the failure of.

Accordingly, in the patent registration number 10-1774862 disclosed in the related art, the first and second selection inflow valves are opened and closed to control the regeneration operation in the second or first tank while the dehumidification operation is performed in the first or second tank. ; A heating step of heating the compressed air having undergone dehumidification through the heating means (22) and introducing the heated compressed air into a tank where regeneration is performed; A cooling step of turning off the heating means after the heating step and turning off compressed air to cool the compressed air that has been heated while passing through the heating means to flow into the tank; The first and second selective inlet valves are opened at the same time, and both the first tank-side discharge valve and the second tank-side discharge valve are closed at the same time to prevent the compressed air from being discharged from the entire system to the atmosphere. A second pressure increasing step of increasing the pressure in the second tank; After the second step of increasing the pressure, the operation of switching the operation of the first tank and the second tank has been pre-registered, but this is to keep the pressure of the dry air supplied to the use continuously constant, It cannot be applied to a precision product manufacturing line that requires constant temperature constant temperature air.

In addition, in another prior art registration patent No. 10-1193663, a check mechanism is provided on the downstream side of the mist separator to prevent backflow of high-pressure dry air to the mist separator, and this tank is provided between the mist separator and the tank. When the high-pressure dry air pressure downstream of the check mechanism is detected while the on-off valve for switching the supply and stop of the high-pressure air to the mist separator is detected, and when the high-pressure dry air pressure exceeds a set value, Although a technology having a pressure switch that suppresses a drop in the internal pressure of the tank by closing the on-off valve has been pre-registered, it is a technology for providing high-pressure air, and maintains the temperature when applied to a site that uses low-temperature air intermittently. The impossible was followed.

On the other hand, the precision product production line including the semiconductor manufacturing line requires low temperature of 3 ° C or less and high pressure air of 8.5 bar, but it is expensive to upgrade the entire air line built with the existing 4.5 bar. The helium gas or nitrogen gas is injected into the air line to meet the requirements of the place of use, but the production cost rises and irregular air consumption (time), for example, air is supplied in a working environment where 10 seconds are waited after 7 seconds of injection of air. In fact, it is difficult to maintain and supply the correct temperature.

KR 10-1774862 B1 (2017.08.30.) KR 10-1193663 B1 (2012. 10. 16.)

In the present invention, a new technology was devised to solve the above-mentioned problems in the prior art, and the present invention provides an air constant temperature cooling system configured to allow air cooled by passing through a rapid cooling heat exchange unit to be transferred to a constant temperature heat exchange unit and pre-cooled at a set temperature. Let's solve the problem.

In addition, since the refrigerant temperature supplied to the quenched heat exchanger and the constant temperature heat exchanger is quickly and accurately corrected in real time by using the high temperature refrigerant output from the compressor, the air usage is flexibly responded to irregular working environments, maintaining a constant temperature without temperature deviation. Another object is to provide an air constant temperature cooling system in which air is provided.

In addition, although not separately described, other objects within a range that can be inferred in consideration of specific contents and claims for carrying out the following invention are also included in the overall subject matter of the present invention.

As a specific means for solving the problems of the present invention, the present invention constitutes an air constant temperature cooling system, but uses a refrigerant circulation cycle using a compressor (1), a condenser (2), an expansion valve (3), and an evaporative heat exchanger (12). Quenched heat exchange unit 10 is provided to cool the; A constant temperature heat exchange unit (20) provided to store and retain air cooled by the first heat exchange unit (10), using low temperature low pressure gas refrigerant having passed through the quench heat exchange unit (10) to maintain air at a constant temperature; A quenching controller unit 30 provided to control the temperature of the low temperature and low pressure liquid refrigerant moving to the quenching heat exchange unit 10 by using the high temperature and high pressure gas refrigerant output from the compressor 1; And a constant temperature controller unit 40 provided to control the low temperature low pressure gas refrigerant temperature supplied to the constant temperature heat exchange unit 20 by using the high temperature low pressure gas refrigerant output from the compressor 1 through the bypass expansion valve 41. It characterized in that it comprises a.

At this time, the quench heat exchange unit 10, the evaporation heat exchanger 12 and evaporation heat exchanger configured to contact the refrigerant line (12a) and the air line (12b) to exchange heat while vaporizing the low temperature and low pressure liquid refrigerant as a gas, evaporation heat exchanger It is installed on the output side of the air line 12b of (12) and is composed of a first temperature sensor 14 that detects an air cooling temperature, and detects the first temperature sensor 14 value and the control unit 50 set temperature value. It is characterized in that it is provided so that the mixing ratio of the high-temperature high-pressure gas refrigerant through the rapid cooling controller unit 30 is calculated.

In addition, the constant temperature heat exchange unit 20, a pre-cooling tank 22 for storing the air cooled by the quench heat exchange unit 10, and a low-temperature low-pressure gas that has passed through the quench heat exchange unit 10 into the pre-cooling tank 22. A refrigerant line (20a) provided to circulate the refrigerant, a pressure sensor (23) for detecting the air pressure output to the pre-cooling tank (22), and a second temperature sensor (24) for detecting the internal temperature of the pre-cooling tank (22) It is characterized in that it is provided to control the mixing ratio of the high-temperature low-pressure gas refrigerant through the constant temperature controller unit 30 by calculating the detection value of the second temperature sensor 24 and the set temperature value of the control unit 50.

In addition, the quench controller unit 30 includes a first bypass line 32 and a first bypass connecting the refrigerant output line 1a of the compressor 1 and the refrigerant output line 3a having passed through the expansion valve 3. It consists of a first bypass valve (34) for controlling the amount of high-temperature, high-pressure gas refrigerant movement through the pass line (32), and the first bypass valve (34) is the first temperature sensor (14) compared to the set value of the controller (50) ) When the detection value is small, the mixing ratio of the high-temperature low-pressure gas refrigerant is increased, and when the detection value of the first temperature sensor 14 is larger than the control unit set value, the mixing ratio of the high-temperature low-pressure gas refrigerant is controlled to be reduced.

In addition, the constant temperature controller unit 40, a second bypass line 42 and a second bypass connecting the refrigerant output line (1a) of the compressor (1) and the refrigerant input line (22a) of the pre-cooled tank (22). It is composed of a second bypass valve (44) that controls the amount of refrigerant movement through the pass line, and a bypass expansion valve (41) that is installed on the second bypass line (42) and outputs a high pressure gas refrigerant as a high temperature and low pressure gas refrigerant. The second bypass valve 44 increases the mixing ratio of the high temperature and low pressure gas refrigerant when the detection value of the second temperature sensor 24 is small compared to the set value of the control unit 50, and decreases the control value of the second bypass valve 44 compared to the set value of the control unit 50. 2 When the detection value of the temperature sensor 24 is large, it is characterized in that the mixing ratio of the high-temperature low-pressure gas refrigerant is reduced.

In addition, a booster compressor 60 connected to the input side of the air line 12b of the evaporative heat exchanger 12 to control the pressure of the air supplied through the main air line 100 is provided.

According to a specific means for solving the above-described problem, the present invention is a precision component manufacturing line such as a semiconductor, since the air cooled through the quench heat exchanger is moved to a constant temperature heat exchanger and pre-cooled at a set temperature to supply the air at the correct temperature. The utility is great.

In addition, since the refrigerant temperature supplied to the quenched heat exchanger and the constant temperature heat exchanger is quickly and accurately corrected in real time by using the high temperature refrigerant output from the compressor, the air usage is flexibly responded to irregular working environments, maintaining a constant temperature without temperature deviation. There is an effect that air is provided.

1 is a block diagram showing the overall air constant temperature cooling system according to an embodiment of the present invention.
2 is a block diagram showing an enlarged quench heat exchange unit and a quench controller unit of an air constant temperature cooling system according to an embodiment of the present invention.
3 is an enlarged configuration diagram showing a constant temperature heat exchange unit and a constant temperature controller of the air constant temperature cooling system according to an embodiment of the present invention.

Hereinafter, specific contents for carrying out the present invention will be described with reference to the accompanying drawings. In addition, when it is determined that the subject matter of the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention relates to an air constant temperature cooling system, which is configured such that air cooled through a rapid heat exchange unit is moved to a constant temperature heat exchange unit and pre-cooled at a set temperature, so that air usage is maintained at constant temperature without temperature deviation even in an irregular working environment. In order to provide air, the main structure includes a quench heat exchange unit 10, a constant temperature heat exchange unit 20, a quench controller unit 30, and a constant temperature controller unit 40.

First, the quench heat exchange unit 10 according to the present invention is provided to cool air using a refrigerant circulation cycle using a compressor 1, a condenser 2, an expansion valve 3, and an evaporative heat exchanger 12.

Referring to FIG. 1, the quench heat exchange unit 10 includes a compressor 1 for compressing a low-temperature, low-pressure gas refrigerant into a high-temperature and high-pressure gas refrigerant, and a refrigerant pipe through which the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows. A condenser (2) that changes the gas refrigerant of high temperature and high pressure into a liquid refrigerant of low temperature and high pressure by contacting the heat absorbing medium with an expansion valve (3) and an expansion valve (3) that reduces the pressure of the liquid refrigerant discharged from the condenser (2). ) Is composed of an evaporative heat exchanger (12) that lowers the temperature of air by contacting air, which is an exothermic fluid, to the low-temperature, low-pressure liquid refrigerant, and phase-changes the low-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gas refrigerant.

And the quench heat exchange unit 10, the evaporation heat exchanger 12 and evaporation heat exchanger (12) is configured such that the refrigerant line (12a) and the air line (12b) are in contact with each other so that the heat exchange is made while vaporizing the low-temperature and low-pressure liquid refrigerant as a gas. It is installed on the output side of the air line 12b of 12) and consists of a first temperature sensor 14 that detects the air cooling temperature. In FIG. 1, the evaporative heat exchanger 12 arranges two evaporative heat exchangers 12 in parallel to increase the cooling efficiency of air, and branches the refrigerant output line 3a through the expansion valve 3 into each refrigerant line 12a. It shows an example of the connection configuration, but is not limited thereto, and the number of evaporative heat exchangers 12 may be adjusted as necessary.

On the other hand, the first temperature sensor 14 is provided to control the mixing ratio of the high temperature and high pressure gas refrigerant through the rapid cooling controller unit 30 by calculating the detected value and the control unit 50 set temperature value. This will be described in detail below with reference to FIG. 2.

The constant temperature heat exchange unit 20 according to the present invention stores and retains the air cooled by the first heat exchange unit 10, and maintains the air at a constant temperature using a low temperature low pressure gas refrigerant that has passed through the rapid cooling heat exchange unit 10. It is provided to.

More specifically, the constant temperature heat exchange unit 20 includes a precooling tank 22 for storing air cooled by the quench heat exchange unit 10 and a low temperature low pressure that has passed through the quench heat exchange unit 10 into the precooling tank 22. A refrigerant line (20a) provided to circulate the gas refrigerant, a pressure sensor (23) for detecting the air pressure output to the pre-cooling tank (22), and a second temperature sensor (24) for detecting the internal temperature of the pre-cooling tank (22) ). Here, the refrigerant line (20a) is configured in the form of a coil tube inside the pre-cooling tank (22), is provided to exchange heat with the air stored in the pre-cooling tank (22), air input and output ports are arranged at both ends of the pre-cooling tank (22) , A drain line for discharging internal condensate is provided.

And, the second temperature sensor 24 is provided to control the mixing ratio of the high-temperature low-pressure gas refrigerant through the constant temperature controller unit 40 by calculating the detected value and the control unit 50 set temperature value. See the description for 3.

2 is an enlarged view of a quench heat exchange unit and a quench controller unit of the air constant temperature cooling system of the present invention, wherein the quench controller unit 30 is a quench heat exchange unit using a high temperature and high pressure gas refrigerant output from the compressor 1 ( 10) is provided to control the low temperature and low pressure liquid refrigerant temperature to be moved.

Here, the quench controller unit 30 includes a first bypass line 32 and a first bypass connecting the refrigerant output line 1a of the compressor 1 and the refrigerant output line 3a that has passed through the expansion valve 3. It consists of a first bypass valve (34) for controlling the amount of high-temperature, high-pressure gas refrigerant movement through the pass line (32).

Accordingly, the first bypass valve 34 increases the mixing ratio of the high-temperature low-pressure gas refrigerant when the first temperature sensor 14 detection value is small compared to the set value of the control unit 50, and the first temperature sensor compared to the set value of the control unit ( 14) When the detection value is large, the mixing ratio of the high-temperature low-pressure gas refrigerant is adjusted so that the temperature of the refrigerant cooled through the evaporative heat exchanger 12 is controlled in real time by controlling the refrigerant temperature supplied to the quench heat exchanger 10 in real time. It can be set to the set value.

FIG. 3 is an enlarged view of a constant temperature heat exchange unit and a constant temperature controller unit of the air constant temperature cooling system, and the controller unit 40 uses constant temperature heat exchange using a high-temperature low-pressure gas refrigerant output through the bypass expansion valve 41 from the compressor 1. It is provided to control the low-temperature low-pressure gas refrigerant temperature to be moved to the unit 20.

The constant temperature controller unit 40 includes a second bypass line 42 and a second bypass line connecting the refrigerant output line 1a of the compressor 1 and the refrigerant input line 22a of the precooling tank 22. It consists of a second bypass valve (44) for controlling the amount of refrigerant movement through, and a bypass expansion valve (41) that is installed on the second bypass line (42) and outputs a high pressure gas refrigerant as a high temperature and low pressure gas refrigerant.

Accordingly, when the detection value of the second temperature sensor 24 is small compared to the set value of the control unit 50, the second bypass valve 44 increases the mixing ratio of the high-temperature and low-pressure gas refrigerant, and the second value of the control unit 50 When the detection value of the temperature sensor 24 is large, the mixing ratio of the high-temperature low-pressure gas refrigerant is adjusted so that the refrigerant temperature transferred to the constant temperature heat exchange unit 20 is quickly and accurately corrected in real time, and in the pre-cooling tank 22. Always keep the temperature of compressed air to match the set temperature.

As such, by further configuring the constant temperature heat exchange unit 20 at the rear end of the quench heat exchange unit 10, air cooled through the quench heat exchange unit 10 is moved to the constant temperature heat exchange unit 20 to be accurately pre-cooled and stored at a set temperature. Can be supplied to the process line.

Also, as illustrated in FIGS. 2 to 3, the refrigerant temperature supplied to the quench heat exchanger 30 and the constant temperature heat exchanger 40 using the high temperature refrigerant output from the compressor 1 is quickly and accurately corrected in real time, respectively, and thus There is an advantage in that high-quality air is maintained at a constant temperature without temperature deviation by flexibly responding to an irregular environment in which an amount of use is irregular, for example, waiting for 10 seconds after spraying air for 7 seconds.

On the other hand, a booster compressor 60 is provided that is connected to the input side of the air line 12b of the evaporative heat exchanger 12 to increase and control the air pressure supplied through the main air line 100. As an example, when a high pressure air of 8.5 bar is required for some lines on the site where the existing air main pressure is 4.5 bar, the existing main air is boosted and supplied from the booster compressor 60 to 8.5 bar, so that the existing main air It is possible to supply air at a pressure required for each use without upgrading the entire line, and supply this high-pressure air at a set temperature by passing through a constant temperature heat exchange unit 20 capable of controlling the temperature of the refrigerant by the constant temperature controller unit 40. It can be.

As described above, in the detailed description of the present invention, the most preferred embodiments of the present invention have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the above-described embodiments, but the protection scope should be recognized from the technologies of the claims to be described later and the technical means equivalent to these technologies.

1: Compressor 1a: Refrigerant output line
2: Condenser 3: Expansion valve
3a: refrigerant output line
10: quench heat exchanger
12: evaporative heat exchanger 12a: refrigerant line
12b: Air line 14: 1st temperature sensor
20: constant temperature heat exchange unit 22: pre-cooling tank
22a: refrigerant input line 23: pressure sensor
24: second temperature sensor
30: quenching controller unit
32: first bypass line 34: first bypass valve
40: constant temperature controller unit 41: bypass expansion valve
42: 2nd bypass line 44: 2nd bypass valve
50: control unit 60: booster compressor

Claims (6)

A quench heat exchange unit 10 provided to cool the air using a refrigerant circulation cycle using a compressor 1, a condenser 2, an expansion valve 3, and an evaporative heat exchanger 12;
A constant temperature heat exchanger (20) provided to store and retain the air cooled by the quench heat exchanger (10), using low temperature low pressure gas refrigerant having passed through the quench heat exchanger (10) to maintain air at a constant temperature;
A quenching controller unit 30 provided to control the temperature of the low temperature and low pressure liquid refrigerant moving to the quenching heat exchange unit 10 by using the high temperature and high pressure gas refrigerant output from the compressor 1; And
A constant temperature controller 40 provided to control the low temperature low pressure gas refrigerant temperature supplied to the constant temperature heat exchange unit 20 by using the high temperature low pressure gas refrigerant output from the compressor 1 via the bypass expansion valve 41; Includes,
The constant temperature heat exchange unit 20 includes a pre-cooling tank 22 for storing air cooled by the quench heat-exchanging unit 10, and a low-temperature low-pressure gas refrigerant having passed through the quench heat-exchanging unit 10 into the pre-cooling tank 22. A refrigerant line (20a) provided to be circulated, a pressure sensor (23) for detecting the air pressure output to the pre-cooling tank (22), and a pre-cooling tank (22) comprising a second temperature sensor (24) for detecting the temperature inside. The air constant temperature cooling system, characterized in that the mixing ratio of the high temperature low pressure gas refrigerant through the constant temperature controller unit 40 is controlled by calculating the detection value of the second temperature sensor 24 and the set temperature value of the control unit 50.
According to claim 1,
The quench heat exchanger (10) includes an evaporative heat exchanger (12) and an evaporative heat exchanger (12) configured so that the refrigerant line (12a) and the air line (12b) come into contact with each other so that heat exchange occurs while vaporizing the low-temperature, low-pressure liquid refrigerant into gas. ) Is installed on the output side of the air line (12b) and consists of a first temperature sensor (14) that detects the air cooling temperature, and calculates the first temperature sensor (14) detection value and the control unit (50) set temperature value. Air constant temperature cooling system, characterized in that provided to control the mixing ratio of the high temperature and high pressure gas refrigerant through the quench controller unit 30.
delete According to claim 2,
The quench controller unit 30 includes a first bypass line 32 and a first bypass line connecting the refrigerant output line 1a of the compressor 1 and the refrigerant output line 3a having passed through the expansion valve 3. It consists of a first bypass valve (34) for controlling the amount of high temperature and high pressure gas refrigerant flow through (32), the first bypass valve (34) detects the first temperature sensor (14) compared to the set value of the control unit (50) When the value is small, the mixing ratio of the high-temperature low-pressure gas refrigerant is increased, and when the detection value of the first temperature sensor 14 is larger than the control value, the constant temperature cooling of the air is characterized in that the mixing ratio of the high-temperature low pressure gas refrigerant is reduced. system.
According to claim 1,
The constant temperature controller unit 40 includes a second bypass line 42 and a second bypass line connecting the refrigerant output line 1a of the compressor 1 and the refrigerant input line 22a of the precooling tank 22. It is composed of a second bypass valve (44) for controlling the amount of refrigerant movement through, and a bypass expansion valve (41) that is installed on the second bypass line (42) and outputs a high pressure gas refrigerant to a high temperature and low pressure gas refrigerant. The second bypass valve 44 increases the mixing ratio of the high-temperature and low-pressure gas refrigerant when the detection value of the second temperature sensor 24 is small compared to the set value of the control unit 50, and the second temperature of the set value of the control unit 50 When the detection value of the sensor 24 is large, an air constant temperature cooling system characterized in that the mixing ratio of the high-temperature low-pressure gas refrigerant is reduced.
The method according to any one of claims 1 to 5,
Air booster cooling system characterized in that it is connected to the input side of the air line (12b) of the evaporative heat exchanger (12) is provided with a booster compressor (60) for boosting and controlling the air pressure supplied through the main air line (100).

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