KR100946136B1

KR100946136B1 - Dual Centrifugal Chiller

Info

Publication number: KR100946136B1
Application number: KR1020080038698A
Authority: KR
Inventors: 김길영; 김진성; 유원일; 정진희
Original assignee: 엘에스엠트론 주식회사
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2010-03-10
Also published as: CN102016443B; WO2009131300A1; JP2011518308A; CN102016443A; US20110036114A1; KR20090112914A

Abstract

The present invention relates to a dual freezer, which aims to provide a dual freezer which lowers the head of the compressor among the components of two independent freezers, and the compressors are configured to operate in the same head.

The dual compressor of the present invention for achieving the above object is a first compressor in which the cold water passes the second evaporator after the first evaporator, the coolant passes the second condenser after the first condenser, accommodating the refrigerant It is characterized in that the first evaporator and the second condenser, the second compressor containing the refrigerant is connected to the second evaporator and the first condenser.

Dual chillers, evaporators, compressors, condensers, refrigerants, cold water, coolant

Description

Dual Freezer {Dual Centrifugal Chiller}

The present invention relates to a dual refrigerator, in particular to lower the head of the compressor among the components of two independent refrigerators, the compressor is configured to operate in the same head.

A typical refrigerator includes a compressor, an evaporator, a condenser, and an expansion valve, and moves heat from the evaporator to the condenser through heat exchange while circulating the refrigerant.

In order to increase the capacity of the refrigerator configured as described above, the capacity of each component may be increased to increase the capacity of the refrigerator itself. Alternatively, the capacity of the refrigerator may be increased by connecting two refrigerators. Thus, the refrigerator which connects two refrigerators is called a "dual freezer."

Conventional dual refrigerators are connected in series.

1 is a schematic view showing a typical dual chiller in series.

As shown in FIG. 1, the dual chiller 10 in parallel includes two evaporators 11 and 12, two condensers 21 and 22, and two compressors 31 and 32. After passing through the first evaporator 11 and passing through the second evaporator 12, it passes through the second evaporator 12 and flows through the path passing through the first evaporator 11. In addition, the cooling water of the condenser passes through the first condenser 21, passes through the second condenser 22, and then passes through the second condenser 22 and passes the first condenser 21.

Meanwhile, the first compressor 31 through which the refrigerant circulates connects the first evaporator 11 and the first condenser 21, and the second compressor 32 through which the refrigerant circulates is the second evaporator 12 and the second. Connect the condenser 22.

Taking the KS standard as an example, the temperature of the cold water introduced into the first evaporator 11 is 12 ° C, and the temperature of the cold water discharged from the first evaporator 11 is 7 ° C. The temperature of the cooling water flowing into the first condenser 21 is 32 ° C, and the temperature of the cooling water discharged from the first condenser 21 is 37 ° C.

At this time, the head of the 1st compressor 31 is 32 degreeC (38 degreeC-6 degreeC), and the head of the 2nd compressor 32 is 29.5 degreeC (36.75 degreeC-7.25 degreeC). The temperature shown in FIG. 1 is the temperature of the cooling water, with the evaporator LTD at 1 ° C. and the condenser LTD at 1 ° C. FIG. Therefore, when the temperature of the cooling water discharged from the first evaporator 11 is 7 ° C, the refrigerant temperature of the first compressor 31 is 6 ° C, and the temperature of the cooling water discharged from the first condenser 21 is 37 ° C. The refrigerant temperature of the first compressor 31 is 38 ° C.

As such, the head of the first compressor 31 is relatively high than the amount of information of the second compressor 32.

Therefore, in using two independent refrigerators of the same structure, the compressor of one of the refrigerators has a relatively high aspect, and thus, an independent compressor must be designed and produced. The same compressor has the advantage of easy design, mass production, and post-management, but it is difficult to take advantage of such advantages in a conventional arrangement.

The present invention has been invented to solve the problems of the prior art as described above, in the turbo-refrigerator having two compressors, two evaporators and two condensers lowered the heads of the compressors configured to operate in the same head The purpose is to provide.

According to a preferred embodiment of the present invention, the first evaporator and the second evaporator are connected in parallel, and the first condenser and the second condenser are connected in series.

According to a preferred embodiment of the present invention, the first evaporator and the second evaporator are connected in series, and the first condenser and the second condenser are connected in parallel.

According to a preferred embodiment of the present invention, the first evaporator and the second evaporator are connected in parallel, and the first condenser and the second condenser are connected in parallel.

As described above, the dual freezer of the present invention is provided with two evaporators, two compressors and two condensers can maintain the same while lowering the head of each compressor can implement the optimum performance of the compressor.

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

2 is a schematic view showing a structure in which two evaporators are connected in parallel and two condensers are connected in series as a dual refrigerator according to the first embodiment of the present invention, and FIG. 3 is a second embodiment of the present invention. 4 is a schematic view showing a structure in which two evaporators are connected in series and two condensers are connected in parallel, and FIG. 4 is a dual freezer according to a third embodiment of the present invention. It is a schematic diagram which shows the structure arrange | positioned in parallel in all. 5 is a schematic view showing a comparative example of the dual refrigerator shown in FIG.

[First Embodiment]

As shown in FIG. 2, in the dual refrigerator 101 according to the first embodiment, the first evaporator 111 and the second evaporator 112 are connected in parallel and parallel, and the first evaporator 111 connected in parallel. After the cold water flows into one end of the first evaporator 111 and is discharged to the other end of the first evaporator 111, the discharged cold water flows into one end of the second evaporator 112 and then passes through the second evaporator 112 to the second evaporator 112. Discharged to the other end of).

In addition, the first condenser 121 and the second condenser 122 are connected in series, and after the coolant flows into the second condenser 122 after passing through the first condenser 121, the second condenser 122 passes out. Discharged.

Meanwhile, the first compressor 131 is connected to the first evaporator 111 and the second condenser 122, and the refrigerant of the first compressor 131 is cold water of the first evaporator 111 and the second condenser 122. The heat of the coolant is transferred to each other and circulates. The second compressor 132 is connected to the second evaporator 112 and the first condenser 121, and the refrigerant of the second compressor 132 is connected to the cold water of the second evaporator 112 and the first condenser 121. Circulates and transfers the heat of cooling water to each other.

In this case, the temperature of the cooling water flowing into the first evaporator 111 is 12 ° C, the temperature of the cooling water discharged from the second evaporator 112 is 7 ° C, and the temperature of the cooling water flowing into the first condenser 121 is 32 ° C. And the temperature of the cooling water discharged from the second condenser 122 is 37 ° C.

Accordingly, when the evaporator LTD 1 ° C and the condenser LTD 1 ° C are considered, the head of the first compressor 131 is 29.5 ° C (38 ° C-8.5 ° C), and the head of the second compressor 132 is 29.5 ° C (35.5 ° C- 6 ° C.).

Second Embodiment

As shown in FIG. 3, in the dual refrigerator 102 according to the second embodiment, a first evaporator 211 and a second evaporator 212 are connected in series, and cold water passes through the first evaporator 211. 2 is introduced into the evaporator 212 and then discharged out through the second evaporator 212.

In addition, the first condenser 221 and the second condenser 222 are connected in parallel in parallel, and the cooling water flows into one end of the first condenser 221 connected in parallel and is discharged to the other end of the first condenser 221. After that, the discharged cooling water flows into one end of the second condenser 222 and then passes through the second condenser 222 and is discharged to the other end of the second condenser 222.

Meanwhile, the first compressor 231 is connected to the first evaporator 211 and the second condenser 222, and the refrigerant of the first compressor 231 is cold water of the first evaporator 211 and the second condenser 222. The heat of the coolant is transferred to each other and circulates. The second compressor 232 is connected to the second evaporator 212 and the first condenser 221, and the refrigerant of the second compressor 232 is connected to the cold water of the second evaporator 212 and the first condenser 221. Circulates and transfers the heat of cooling water to each other.

In this case, the temperature of the cold water flowing into the first evaporator 211 is 12 ° C, the temperature of the cold water discharged from the second evaporator 212 is 7 ° C, and the temperature of the cooling water flowing into the first condenser 221 is 32 ° C. And the temperature of the cooling water discharged from the second condenser 222 is 37 ° C.

Therefore, when the evaporator LTD 1 ° C and the condenser LTD 1 ° C are considered, the head of the first compressor 231 is 29.5 ° C (35.5 ° C-6 ° C), and the head of the second compressor 232 is 29.5 ° C (38 ° C- 8.5 ° C.).

Third Embodiment

As shown in FIG. 4, in the dual refrigerator 103 according to the third embodiment, the first evaporator 311 and the second evaporator 312 are connected in parallel and parallel, and the first evaporator 311 connected in parallel. After the cold water flows into one end of the first evaporator 311 and is discharged to the other end of the first evaporator 311, the discharged cold water flows into one end of the second evaporator 312 and then passes through the second evaporator 312 to the second evaporator 312. Discharged to the other end of).

In addition, the first condenser 321 and the second condenser 322 are connected in parallel in parallel, and the coolant flows into one end of the first condenser 321 connected in parallel and is discharged to the other end of the first condenser 321. Afterwards, the discharged cooling water is introduced into one end of the second condenser 322 and then discharged through the second condenser 322 to the other end of the second condenser 322.

Meanwhile, the first compressor 331 is connected to the first evaporator 311 and the second condenser 322, and the refrigerant of the first compressor 331 is cold water of the first evaporator 311 and the second condenser 322. The heat of the coolant is transferred to each other and circulates. The second compressor 332 is connected to the second evaporator 312 and the first condenser 321, and the refrigerant of the second compressor 332 is connected to the cold water of the second evaporator 312 and the first condenser 321. Circulates and transfers the heat of cooling water to each other.

At this time, the temperature of the cold water flowing into the first evaporator 311 is 12 ℃, the temperature of the cold water discharged from the second evaporator 312 is 7 ℃, the temperature of the cooling water flowing into the first condenser 321 is 32 ℃. And the temperature of the cooling water discharged from the second condenser 322 is 37 ° C.

Therefore, when considering the evaporator LTD 1 ℃ and the condenser LTD 1 ℃, the head of the first compressor 331 is 29.5 ° C (38 ° C-8.5 ° C), the head of the second compressor 332 is 29.5 ° C (35.5 ° C- 6 ° C.).

[Comparative Example]

Meanwhile, in the dual chiller 104 illustrated in FIG. 5, the cold water of the evaporator passes through the first evaporator 411 and the second evaporator 412, and the cooling water of the condenser is the first condenser 421 and the second condenser 422. Goes through. The first compressor 431 connects the first evaporator 411 and the first condenser 421, and the second compressor 432 connects the second evaporator 412 and the second condenser 422.

In this case, the temperature of the cold water flowing into the first evaporator 411 is 12 ° C, the temperature of the cold water discharged from the second evaporator 412 is 7 ° C, and the temperature of the cooling water flowing into the first condenser 421 is 32 ° C. And the temperature of the cooling water discharged from the second condenser 422 is 37 ° C.

Therefore, when the evaporator LTD 1 ° C and the condenser LTD 1 ° C are considered, the head of the first compressor 431 is 27 ° C (35.5 ° C-8.5 ° C), and the head of the second compressor 432 is 32 ° C (38 ° C- 6 ° C.).

As described above, the first and second compressors 131, 132, 231, 232, 331, and 332 according to the first to third embodiments have a head of 29.5 ° C., but the comparison shown in FIG. 5 described as a comparative example is performed. The first compressor 431 of the dual refrigerator 104 has a head of 27 ° C, and the head of the second compressor 432 is 32 ° C.

As such, in a dual refrigerator having two evaporators, two condensers, and two compressors, the head of the compressor may be different according to each arrangement.

According to the present invention, although not shown in the drawings, in a state in which the first evaporator and the second evaporator are connected in series and the first condenser and the second condenser are connected in series, the first compressor is configured to supply the first evaporator and the second condenser. And a second compressor may connect the second evaporator and the first condenser. In such a case, the length of the first compressor connecting the first evaporator and the second condenser and the second compressor connecting the second evaporator and the first condenser may be connected in an elongated state.

1 is a schematic view showing a typical dual chiller in series.

2 is a schematic view showing a structure in which two evaporators are connected in parallel and two condensers are connected in series as a dual refrigerator according to the first embodiment of the present invention.

3 is a schematic view showing a structure in which two evaporators are connected in series and two condensers are connected in parallel as a dual refrigerator according to a second embodiment of the present invention.

4 is a schematic view showing a structure in which both the evaporator and the two condensers are arranged in parallel as the dual refrigerator according to the third embodiment of the present invention.

5 is a schematic view showing a comparative example of the dual refrigerator shown in FIG.

Explanation of symbols on the main parts of the drawings

111, 211, 311: first evaporator

112, 212, 312: second evaporator

121, 221, 321: first condenser

122, 222, 322: second condenser

131, 231, 331: first compressor

132, 232, 332: second compressor

Claims

After the cold water passes through the first evaporators 111, 211, and 311, passes through the second evaporators 112, 212, and 312, and after the coolant passes the first condensers 121, 221, and 321, the second condenser 122, 222. , 322, the first compressor (131, 231, 331) containing the refrigerant connects the first evaporator (111, 211, 311) and the second condenser (122, 222, 322), the refrigerant And a second compressor (132, 232, 332) is accommodated is connected to the second evaporator (112, 212, 312) and the first condenser (121, 221, 321).
The method of claim 1,

The first evaporator 111 and the second evaporator 112 are connected in parallel,

Dual chiller, characterized in that the first condenser (121) and the second condenser (122) is connected in series.
The method of claim 1,

The first evaporator 211 and the second evaporator 212 are connected in series,

Dual chiller, characterized in that the first condenser (221) and the second condenser (222) is connected in parallel.
The method of claim 1,

The first evaporator 311 and the second evaporator 312 are connected in parallel,

Dual chiller, characterized in that the first condenser (321) and the second condenser (322) is connected in parallel.