CN2141881Y

CN2141881Y - Deep cooling treatment tank

Info

Publication number: CN2141881Y
Application number: CN 92243315
Authority: CN
Inventors: 吴一平
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 1992-12-04
Filing date: 1992-12-04
Publication date: 1993-09-08
Anticipated expiration: 2002-12-04

Abstract

The utility model belongs to a deep cooling device, which is a tank type structure that an inner layer tank and an outer layer tank are embedded; an open cover is arranged on the upper part, wherein, the inner layer tank is cooling treatment tank and is cooled by liquid nitrogen, and the outer layer tank is a refrigerator. The utility model can completely satisfy the requirement of the treatment of the small capacity and deep cooling from-80 DEG C to-180 DEG C; the temperature range of the cooling treatment is wide; the control precision is high; the equipment investment is low; the utility model can be used for cooling treatment and can also be used as the refrigerator.

Description

Deep cooling treatment tank

The utility model belongs to deep freeze refrigeration plant

The domestic past adopts the check ring of method cold treatment precipitation-hardening stainless steel manufacturing of dry ice refrigeration and fluorine Lyons two stages of compression refrigeration and other precision components to adapt to the oil bit industrial expansion, and its cold treatment process requires at-80 ℃--and subzero treatment is 8 hours under 150 ℃ of low temperature environments.But because the more original and dry ice of dry ice refrigeration equipment source is few, and the cold minimum temperature of two stages of compression be-80 ℃, and the equipment complexity is invested greatly, heavy, is difficult to keep in repair, and also needs cooling circulating water.If pure employing liquid nitrogen refrigerating also is difficult for greatly promoting the use of because of the liquid nitrogen consumption.

According to the shortcoming that above-mentioned prior art exists, the utility model provides a kind of nested type body structure subzero treatment case.

The utility model is implemented by following technical proposals, it is internal layer case and two-layer nested, the last open type case structure of outer case, described internal layer case is the cold treatment case, box inside is furnished with coil heat exchanger, on the coiled pipe end entrance with get nitrogen liquid pipe and be communicated with, the other end of getting liquid nitrogen pipe is communicated with liquid nitrogen storage.Described outer case is a refrigerator through repacking, uncaps in top, and bottom and side are respectively equipped with refrigeration machine, digital instrument and refrigeration piping.

The utility model has the advantages that: (one) can satisfy the requirement of subzero treatment fully, and easy to operate, the utilization rate height, and noiselessness, pollution-free.Because mechanical refrigeration adds the liquid nitrogen deep cooling, reduces the liquid nitrogen consumption greatly.(2) cold treatment temperature range is wide, the control accuracy height, and temperature homogeneity is good.(3) owing to outer case is reequiped by the commodity refrigerator, so good looking appearance.(4) not only can do cold treatment with but also can make refrigerating box and use.

Fig. 1 is a nested type subzero treatment box structure schematic diagram.

That the utility model is described in further detail is as follows below in conjunction with accompanying drawing:

Insert the liquid nitrogen heater 2 that has lead 4 in the liquid nitrogen storage 1, an end of getting liquid nitrogen pipe 3 is sealed in the liquid nitrogen storage 1, the other end is communicated with liquid flowing tube, the other end of liquid flowing tube is communicated with coil heat exchanger 11, the outside of liquid flowing tube is with heat-preserving

hose

5,7 is outer case lid, and 8 is the internal layer case lid, and internal layer case 12 is nested in the outer case (refrigerator) 9.The below of internal layer case 12 is that the refrigeration compressor 13 and the numeral of refrigerator shows control instrument 14.10 is RTD, and 6 is nitrogen exhaust pipe.

The novel empty stove cooling test result of this reality is as shown in table 1.Result of the test shows that the liquid nitrogen consumption is: during the cooling of empty stove, one bottle of 35 liters of liquid nitrogen can be controlled at temperature-80 ℃ of times and reach more than 20 hours, load 80 kilograms of check rings and only use half bottle of liquid nitrogen in 8 hours-80 ℃ of following cold treatments.

Table 1

Control temperature (℃)

－18

－40

－60

－80

－100

－120

－140

－160

To the temperature time (branch)

0

60

135

165

200

230

275

320

Temperature error (℃)

±2

±1

Claims

1, a kind of subzero treatment case, constitute by refrigerator and liquid nitrogen storage, it is two-layer nested with outer case (9) by internal layer case (12) to it is characterized by described treatment box, top is provided with the case structure of (7) (8) of uncapping, described internal layer case (12) is the cold treatment case, box inside is provided with coil heat exchanger (11), porch, coiled pipe (11) upper end with get liquid nitrogen pipe and be communicated with, the other end of getting liquid nitrogen pipe is communicated with liquid nitrogen storage (1), described outer case (9) is a refrigerator, on establish uncap (7), bottom and side are respectively equipped with refrigeration compressor (13), digital instrument (14) and refrigerator pipes.