KR101859944B1 - Precisely coolant temperature controllable cooling system - Google Patents

Abstract

The present invention relates to a compressor for compressing a refrigerant in a vapor phase; A condenser for heat-exchanging the refrigerant cooled in the compressor with outside air to condense the refrigerant; An expansion valve connected to a rear end of the receiver for temporarily storing the refrigerant and reducing the pressure of the refrigerant to a low pressure before the refrigerant is sent to the evaporator and controlling the flow rate of the refrigerant; A heat exchanger supplied with the refrigerant depressurized by the expansion valve and varying the cooling water flowing into the cooling or heating load to a set temperature; A first temperature sensor installed in a supply pipe connected to the heat exchanger and sensing a supply temperature of cooling water flowing from the cooling or heating load side to control the operation of the heat exchanger to change the cooling water to a set temperature; And a flow-over type coolant circulation member that maintains a temperature lower than a set temperature through the supply conduit and maintains the supplied coolant at a coolant set temperature while overflowing the coolant in multiple stages.
According to this, the cooling water supplied to the cooling water tank below the set temperature through the heat exchanger flows over the first to fourth dilution tanks of the overflow type cooling water circulating member in multi-stepwise manner, and the cooling water of the first and third dilution tanks Selectively circulating the cooling water through the circulation pump to precisely control the temperature of the final cooling water supplied to the cooling or heating load side within ± 0.05 ° C to 0.1 ° C so as to supply the cooling water to the cooling or heating load side.

Description

TECHNICAL FIELD [0001] The present invention relates to a cooling system,

The present invention relates to a cooling system capable of precisely controlling the temperature of a cooling water, which is capable of precisely controlling a cooling water temperature by using a multi-stage dilution method of overflowing a cooling water temperature circulating through a heat exchanger and a cooling or heating load region.

BACKGROUND ART [0002] In general, in a cooling and heating system applied to manufacture a laboratory or printed circuit board, a cooling system is required to precisely control the temperature of cooling water circulated through a heat exchanger.

Such a general cooling system is a system in which cooling water is stored in a cooling water tank and circulated by a convection action for a predetermined time.

That is, the cooling water temperature supplied to the set temperature or less through the heat exchanger of the cooling system stays for a long time and is maintained at the set temperature, and then supplied to the cooling or heating load side through the pump.

However, in the conventional cooling system, since the water tank for storing the cooling water is formed in the form of a single water tank storing a large amount of cooling water, it took a long time to precisely control the set temperature of the cooling water stored in the interior, There has been a problem that the set temperature deviation of the cooling water is extremely severe due to the continuously flowing cooling water.

Accordingly, there has been a limit in accurately controlling the temperature of the cooling water supplied to the cooling / heating system or the heating load side of the cooling / heating system applied to manufacture the laboratory or printed circuit board to a temperature of ± 0.05 ° C to 0.1 ° C.

Korean Patent No. 10-0759036 Korea Utility Model Registration No. 20-0377788

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide an apparatus and a method for reducing the temperature of cooling water supplied to a cooling water tank below a set temperature through a heat exchanger, The present invention relates to a cooling system capable of precisely controlling the temperature of a cooling water, which can precisely control and supply the final cooling water temperature, which is supplied to the cooling or heating load side, through the overflow type cooling water circulation member.

According to a preferred embodiment of the present invention, a cooling system capable of precisely controlling the temperature of the cooling water comprises: a compressor for compressing gaseous refrigerant; A condenser for heat-exchanging the refrigerant cooled in the compressor with outside air to condense the refrigerant; An expansion valve connected to a rear end of the receiver for temporarily storing the refrigerant and reducing the pressure of the refrigerant to a low pressure before the refrigerant is sent to the evaporator and controlling the flow rate of the refrigerant; A heat exchanger supplied with the refrigerant depressurized by the expansion valve and varying the cooling water flowing into the cooling or heating load to a set temperature; A first temperature sensor installed in a supply pipe connected to the heat exchanger and controlling the operation of the heat exchanger to change the cooling water to a set temperature after sensing the supply temperature of the cooling water flowing from the cooling or heating load side; And a flow-over type coolant circulation member that maintains a coolant set temperature while maintaining a temperature lower than a set temperature through the supply conduit and multi-stepping over the supplied coolant water, wherein the overflow type coolant circulation member has a rectangular parallelepiped shape A water tank main body having an inlet port for allowing the cooling water supplied from the heat exchanger to flow into the uppermost water level; A first partition wall and a second partition wall are provided on one side of the water tank main body in a 'T' shape, and an upper end of the first partition wall is the same as a position of the inlet, A first diluting tank formed inside the first partition toward the inlet while being formed lower than the top; A second diluter located outside the first partition to face the first diluter; A third partition wall having an upper end formed to be higher than an upper end of the second partition and spaced apart from the second partition in parallel to the second partition and having a plurality of through holes extending from a central portion of the surface to a lower portion, A third diluting tank disposed at one side of the third partition wall facing the two partition walls; A fourth diluting tank located on the other side of the third partition to face the third dilution tank; And a main pump connected to a lower portion of the fourth dilution tank through a discharge pipe to supply cooling water to the cooling or heating load side, wherein the third dilution tank and the first dilution tank are connected to the circulation pump by a suction pipe and a discharge pipe, The cooling water of the third dilution tank and the cooling water of the first dilution tank are forcibly circulated, the input port is located at an intermediate portion or an upper end portion of the first dilution tank, the output port is located at a central portion of the third dilution tank, Wherein a discharge pipe of the circulation pump is connected to the input port, the suction pipe of the circulation pump is connected to the output port, and the temperature of the cooling water supplied to the cooling or heating load side is checked on the inner bottom of the fourth dilution tank, And a second temperature sensor is provided so as to be displayed on the display window.

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According to the present invention, the discharge pipe may be formed at a position corresponding to the through-hole so that the suction pipe of the main pump is connected.

According to the present invention, cooling water transfer passages are formed at both sides of the lower part of the first partition and the lower part of the third partition and a drain port may be formed in the lower part of the side wall of the first dilution tank and the fourth dilution tank.

According to the present invention, the cooling water supplied to the cooling water tank through the heat exchanger at a temperature lower than the set temperature is allowed to flow over the first to fourth dilution vessels of the overflow type cooling water circulation member in multiple stages, and the cooling water of the first and third dilution baths The temperature of the final cooling water supplied to the cooling or heating load side can be precisely controlled within a range of 占 .05 占 폚 to 0.1 占 폚 and supplied to the cooling or heating load side by selectively circulating the cooling water selectively through the circulation pump.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow diagram of a cooling system capable of precisely controlling the temperature of a cooling water of the present invention, Fig.
2 and 3 are a perspective view and a cross-sectional view showing the construction of a flow-through type cooling water circulating member according to an embodiment of the cooling water precise temperature controllable cooling system of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator And the definitions of these terms should be based on the contents throughout this specification.

1 and 2, a cooling system capable of controlling the cooling water precise temperature according to an embodiment of the present invention includes a compressor 10, a condenser 20, an expansion valve 30, a heat exchanger 40, 1 temperature sensor S1 and a flow type cooling water circulation member 50. [

The compressor 10 is connected to the heat exchanger 40 through a pipe and compresses the refrigerant in the heat exchanged with the heat exchange water supplied from a cooling load side (e.g., a laboratory) connected to the heat exchanger 40.

The condenser 20 is connected to the compressor 10 and serves to heat the refrigerant cooled in the compressor 10 by heat exchange with the outside air to condense the refrigerant.

The expansion valve 30 is connected to the downstream end of a receiver (receiver tank) 21 connected to the condenser 20 to temporarily store the refrigerant. The expansion valve 30 reduces the pressure of the refrigerant to a low pressure and controls the refrigerant flow rate before sending the refrigerant to the evaporator.

At this time, a filter driver 22 is connected between the expansion valve 30 and the receiver 21 to absorb the refrigerant water, so that the refrigerant is frozen in the capillary of the expansion valve 30 and the condenser 20 Do not disturb the flow of refrigerant.

The heat exchanger (40) serves to vary the cooling water flowing into the cooling or heating load to the set temperature by receiving the refrigerant depressurized by the expansion valve (30).

A hot gas bypass control valve 23 is provided between the refrigerant supply pipe of the expansion valve 30 and the refrigerant supply pipe of the heat exchanger 40 and the refrigerant return pipe connecting the compressor 10 and the condenser 20, And to control the load between the condensing section and the compression section.

The supply pipe path P1 connected to the heat exchanger 40 and the water tank main body 55 described later is connected to the heat exchanger 40 for sensing the supply temperature of the cooling water flowing from the cooling or heating load side, A first temperature sensor S1 is provided to vary the cooling water to a set temperature.

The circulating-type cooling water circulating member 50 is configured to circulate the cooling water temperature supplied to the cooling water tank below the set temperature through the heat exchanger 40 stepwise as an overflowing multi-step dilution system, To within a range of 占 0.05 占 폚 to 0.1 占 폚.

That is, the cooling water is kept at a temperature lower than the set temperature through the supply pipe (P1), and the supplied cooling water is kept at the cooling water set temperature while overflowing in many stages.

The circulation type cooling water circulation member 50 may be constructed as follows.

First, a water tank body 55 having a rectangular parallelepiped shape and provided with an inlet port 55b through which the cooling water is supplied from the heat exchanger 40 to the uppermost water level is provided.

Preferably, a heat insulating material (not shown) is provided on the entire outer surface of the water tank main body 55 so as to minimize the temperature change of the cooling water due to the external temperature.

One side of the inner space of the water tub main body 55 is partitioned by a first partition wall 56 and a second partition wall 57 which are installed in a crossing manner in the form of a 'T' And a second dilution tank 52 are provided.

The height of the first partition 56 is equal to the height of the inlet 55b and the height of the second partition 57 is lower than the height of the first partition 56 so that the inlet 55b ) Is provided with the first diluting tank (51) in which cooling water is supplied and stays so as to maintain the temperature below the set temperature through the heat exchanger (40) and the supply pipe path (P1).

The second diluting tank 52 is formed adjacent to the first diluting tank 51 and the cooling water flowing into the first diluting tank 51 is filled in the first diluting tank 51, Becomes a space overflowing over the first partition 56 and staying therein.

The first dilution tank 51 and the second dilution tank 52 are formed at the center of the water tank main body 55 by a third partition wall 58 spaced in parallel to the second partition wall 57, And a third dilution tank 53 arranged in parallel.

The cooling water in the upper portion of the first dilution tank 51 and the cooling water flowing in the second dilution tank 52 flow over the third partition wall 58 and stay in the third dilution tank 53.

The third dilutation tank 53 is disposed adjacently to the third dilutation tank 53 with respect to the third partition 58 so that the third dilutation tank 53 can be divided into the third dilutation tank 53, And a fourth dilution tank 54 in which the upper portion is closed, which allows the cooling water flowing over the dilution tank 53 to flow and stay therein downward, is provided.

And a main pump 70 connected to the discharge pipe 55a provided at a lower portion of the fourth dilution tank 54 to supply cooling water maintained at a set temperature to the cooling or heating load side.

According to the flow-through type cooling water circulating member 50 having such a configuration, as described above, cooling water cooled to a set temperature or less through the heat exchanger 40 is first supplied to the first dilution tank 51 through the inlet.

The cooling water filled in the first dilution tank (51) flows over the first dilution tank (52) beyond the first partition (56).

After the cooling water is filled in the first dilution tank 51 and the second dilution tank 52 and filled up to the upper end of the second partition 57, the cooling water is filled and filled in the third dilution tank 53.

At this time, the cooling water filled in the third dilution tank 53 starts to be filled in the fourth dilution tank 54 through the throughflow hole 59. Since the fourth dilution tank 54 has a closed top shape, So that the temperature is constantly maintained after being completely filled up to the inlet line.

 In this state, the cooling water is sequentially supplied to the first diluting tank 51, the second diluting tank 52, the third diluting tank 53, and the fourth diluting tank 54 so as to be sequentially supplied, The temperature of the cooling water can be stored in the water tub main body 55 without rapidly changing to the set temperature.

If the water tank body is composed of a single water tank body, the cooling water supplied below the set temperature is diluted with the cooling water already stored by the convection action inside the single water tank body, so that the set temperature of the cooling water discharged to the main pump It is virtually impossible to precisely control the cooling water temperature because of the large deviation

On the contrary, in the present invention, the cooling water which is to be retained in each dilution tank is circulated by the convection action in each dilution tank space, and the cooling water of each diluting tank is separated from the first partition 56 to the third partition 58 It goes beyond the next dilution tank.

In particular, when the cooling water is retained in each dilution tank, the temperature of the cooling water in the upper layer is slightly higher than the temperature of the cooling water in the lower layer due to the convection action. At this time, the cooling water continuously flows through the inlet 55b The cooling water of the upper layer which is circulated by the convection action while gradually staying below the dilution tank and is to be gradually raised to the set temperature above the set temperature is introduced into the second dilution tank 52 through the first partition 56, .

This overflow action gradually rises from the first dilution tank 51 to the third dilution tank 53 while gradually exceeding the first and second diaphragms 56 to 57,

In the step of passing to the fourth dilution tank 54, a fourth dilution (not shown) flows through the plurality of through-holes 59 formed from the middle to the bottom of the third partition 58 without overflowing to the upper side of the third partition 58, As the coolant is pushed downward in the tank 54, the coolant is overflowed, and the coolant is swirled while abrupt movement is restricted.

Therefore, since the discharge pipe 55a of the water tank body 55 connected to the main pump 70 is adjacent to the lower side of the fourth dilution tank 54, the first dilution tank 51 to the third dilution tank 53 The cooling water flowing down to the lower portion of the fourth dilution tank 54 maintains the set temperature at all times.

As a result, the cooling water that maintains the preset temperature stored in the fourth dilution tank 54 is supplied to the cooling or heating load side through the discharge pipe 55a connected to the main pump 70 while the cooling water is maintained, And can be stably maintained.

According to another embodiment of the present invention, the circulation pump 80 for forcibly circulating the cooling water of the first diluting tank 51 and the third diluting tank 53 for maintaining a more precise temperature of the cooling water may be further included have.

According to the present invention, the inlet port 60 for the cooling water circulation can be located at the middle or upper end of the first dilutation tank 51 and the outlet port 61 can be located at the upper end of the third dilutation tank 53 The discharge pipe 82 of the circulation pump 80 may be connected to the input port and the suction pipe 81 of the circulation pump 80 may be connected to the output port 61 .

That is, since the cooling water is connected to the inlet 55b in the first diluting tank 51, the cooling water is maintained at the set temperature or lower, and the cooling water staying in the third diluting tank 53 is supplied to the first diluting tank and the second diluting tank The temperature near the set temperature can be precisely controlled through the process of overflowing through the heat exchanger 52.

In addition, the cooling water of the third dilution tank 53 is supplied to the first dilution tank 51 through the circulation pump 80 for circulation, whereby the circulation cycle is more activated than the action of the cooling water naturally overflowing It is possible to control the temperature of the cooling water which is staying in the third dilution tank 53 to be controlled so as to be controlled to be higher than that of the cooling water temperature maintenance method described above.

And a second temperature sensor (S2) for checking the temperature of cooling water supplied to the cooling or heating load side and displaying the cooling water temperature on an external set temperature display window on the inner bottom of the fourth dilution tank (54).

The discharge pipe 55a of the fourth dilution tank 54 may be formed at a position corresponding to the through hole 59 and connected to the suction pipe 81 of the main pump 70.

According to the present invention, a cooling water passage (not shown) is formed at both lower corners of the second partition 57 and the third partition 58 so as to uniformly flow over the cooling water. Lt; / RTI >

According to this cooling water transfer passage, the cooling water of the first diluting tank 51 and the second diluting tank 52 flows into a portion of the lower cooling water toward the third diluting tank 53 on the basis of the second partition 57 A uniform overflow action can be achieved corresponding to the flow of the cooling water flowing over the second partition 57.

A first drain port 63 for discharging cooling water and a second drain port 63 for discharging cooling water are provided under the sidewalls of the first diluting tank 51 and the fourth diluting tank 54 for cleaning and managing the inside of the water tank main body 55, (64) may be respectively formed. At this time, cooling water or washing water remaining on the bottom of the third dilution tank through the cooling water transfer passage is completely discharged through the first drain port 63 and the second drain port 64.

According to the present invention, the cooling water temperature obtained by the first temperature sensor S1 and the second temperature sensor S2 is compared with each other. Then, the supply speed of the cooling water of the main pump 70 is controlled, And a cooling water precise temperature control unit (not shown) for controlling the operation of the cooling water.

That is, according to the cooling water precise temperature control section, the cooling water temperature value supplied to the temperature lower than the set temperature in the heat exchanger 40 is compared with the cooling water temperature close to the set temperature value staying in the fourth dilution tank 54, It is possible to precisely control the set temperature of the cooling water of the fourth dilution tank 54 by selectively operating the circulation pump 80 with respect to the cooling water of the first dilution tank 51 and the third dilution tank 53.

Although not shown in the drawing, a temperature sensor is additionally provided in each of the first diluting tank 51, the second diluting tank 52 and the third diluting tank 53, And the cooling water temperature value of the second temperature sensor S2 is compared with the cooling water temperature value sensed in each of the dilution baths to compare the overflow flow rate of the cooling water with the operation time of the circulation pump 80 or the operation time interval So that the desired cooling water temperature can be precisely controlled.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

10: compressor 20: condenser
21: receiver (receiver tank) 22: filter driver
30: expansion valve 40: heat exchanger
50: overflow type cooling water circulation member 51: first dilution tank
52: second diluting tank 53: third diluting tank
54: fourth dilution tank 55: water tank main body
56: first partition 57: second partition
58: third partition wall 59:
60: input port 61: output port
63: first drain port 64: second drain port
70: main pump 71: suction pipe
80: circulation pump 81: suction pipe
82: discharge pipe
S1: first temperature sensor S2: second temperature sensor

Claims (7)

A compressor for compressing the gaseous refrigerant;
A condenser for heat-exchanging the refrigerant cooled in the compressor with outside air to condense the refrigerant;
An expansion valve connected to a rear end of the receiver for temporarily storing the refrigerant and reducing the pressure of the refrigerant to a low pressure before the refrigerant is sent to the evaporator and controlling the flow rate of the refrigerant;
A heat exchanger supplied with the refrigerant depressurized by the expansion valve and varying the cooling water flowing into the cooling or heating load to a set temperature;
A first temperature sensor installed in a supply pipe connected to the heat exchanger and controlling the operation of the heat exchanger to change the cooling water to a set temperature after sensing the supply temperature of the cooling water flowing from the cooling or heating load side;
And a flow-over type coolant circulation member that maintains a coolant set temperature while maintaining a temperature lower than a set temperature through the supply conduit and multi-stepping over the coolant to be supplied,
The circulation type cooling water circulation member
A water tub main body having a rectangular parallelepiped shape and having an inlet port for allowing the cooling water supplied from the heat exchanger to flow into the uppermost water level;
A first partition wall and a second partition wall are provided on one side of the water tank main body in a 'T' shape, and an upper end of the first partition wall is the same as a position of the inlet, A first diluting tank formed inside the first partition toward the inlet while being formed lower than the top;
A second diluter located outside the first partition to face the first diluter;
A third partition wall having an upper end formed to be higher than an upper end of the second partition and spaced apart from the second partition in parallel to the second partition and having a plurality of through holes extending from a central portion of the surface to a lower portion, A third diluting tank disposed at one side of the third partition wall facing the two partition walls;
A fourth diluting tank located on the other side of the third partition to face the third dilution tank; And
And a main pump connected to a lower portion of the fourth dilution tank through a discharge pipe to supply cooling water to the cooling or heating load side,
The third dilution tank and the first dilution tank are connected to the circulation pump by the suction pipe and the discharge pipe so that the cooling water of the third dilution tank and the cooling water of the first dilution tank are forcedly circulated, And the outlet port of the circulating pump is connected to the input port and the inlet port of the circulating pump is connected to the output port,
And a second temperature sensor is installed on the inner bottom of the fourth dilution tank so that the temperature of the cooling water supplied to the cooling or heating load side is checked and displayed on an external set temperature display window. delete delete delete delete The method according to claim 1,
Wherein the discharge pipe is formed at a position corresponding to the through hole so that the suction pipe of the main pump is connected. The method according to claim 1,
Wherein cooling water transfer passages are formed at both sides of the lower part of the first bank and the lower part of the third bank and a first drain port and a second drain port are formed under the side walls of the first dilution tank and the fourth dilution tank, Controllable cooling system.

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