KR102411307B1 - A dual refrigeration device for low-temperature storage of pharmaceuticals. - Google Patents

Abstract

The present invention relates to a binary refrigeration device for storing medicines at a low temperature, and more particularly, the refrigerant of the low-temperature side refrigeration unit is cooled while continuously passing through the condenser and the cascade condenser of the high-temperature side refrigeration unit, so that the amount of heat of condensation is higher than that of the existing binary refrigeration system. As it is increased to enable efficient low-temperature freezing, it is easy to use for frozen storage of medicines and pharmaceutical samples at minus 70 degrees Celsius. It relates to a dual refrigeration device for low-temperature storage of pharmaceuticals.

Description

A dual refrigeration device for low-temperature storage of pharmaceuticals.

In the present invention, in using a binary refrigeration system, the refrigerant of the low-temperature side refrigeration unit is sequentially passed through the condenser and the cascade condenser of the high-temperature side refrigeration unit to increase the amount of condensation heat, so that medicines and pharmaceutical samples can be stored in a preset low temperature range. It relates to a dual refrigeration device for storing medicines at a low temperature, which enables easy implementation of low-temperature freezing.

A refrigerator for storing general food generally includes a refrigerator compartment and a freezer compartment. The temperature of such a general freezer compartment and refrigerating compartment is lowered to a temperature required for frozen storage of food.

However, it is not a general food, but in hospitals or research institutes, there are objects that must be stored at a very low low temperature (ultra-low temperature or deep temperature), so the temperature inside the refrigerator is -60 ~ -70℃ or lower The need for a freezer is being raised.

According to this need, a deep-temperature freezing system capable of maintaining the internal temperature of a refrigerator at a very low temperature by using a two-way freezing cycle composed of a high-temperature cycle part and a low-temperature cycle part has been proposed.

The binary refrigeration cycle is generally composed of a high-temperature cycle part and a low-temperature cycle part. The high-temperature cycle part includes a compressor that compresses a gaseous refrigerant, a condenser that radiates heat from the refrigerant compressed in the compressor to condense it, an expansion valve that lowers the pressure of the liquid refrigerant condensed in the condenser, and the components It includes an evaporator that generates cold air by evaporating the low-temperature and low-pressure refrigerant through the inside. In addition, the high-temperature cycle part has a temperature characteristic of the refrigerant almost similar to that of a general refrigeration cycle, and the evaporator maintains a low-temperature state, but has a relatively high temperature compared to the evaporator of the low-temperature cycle part to be described later.

And the low-temperature cycle part includes a compressor for compressing a gaseous refrigerant, a condenser for condensing the compressed refrigerant, an expansion valve for reducing the pressure of the condensed refrigerant, and an evaporator for performing heat exchange using the refrigerant of low temperature and low pressure, have. Here, the evaporator of the low-temperature cycle part must be maintained at a lower temperature than that to form an ultra-low temperature (for example, a low temperature of -60 to -70°C or lower) required in the refrigeration space.

In a deep-temperature refrigeration system using such a dual cycle, it is important to what extent the evaporator of the low-temperature cycle part can lower the temperature.

There is an urgent need for a configuration of a refrigeration system capable of lowering the temperature more efficiently.

Korean Patent Publication No. 10-2004-0053696 (published on June 24, 2004)

The present invention has been devised to solve the above problems, and an object of the present invention is to configure the refrigerant of the low-temperature side refrigeration unit to sequentially pass through the condenser and the cascade condenser of the high-temperature side refrigeration unit in a binary refrigeration system, The low-temperature pressure is reduced as the amount of heat of condensation becomes larger than that of the system, so that the low-temperature freezing of the preset low-temperature range desired by the user can be easily and easily achieved.

Even during the hot gas defrosting operation, a circulation line capable of transferring heat from the high temperature side to the low temperature side is further provided to prevent the liquid phase from being contained in the refrigerant flowing into the second compressor of the low temperature side refrigeration unit, thereby prolonging the life of the second compressor. An object of the present invention is to provide a dual refrigeration device for low-temperature storage of pharmaceuticals, which can be extended and used for a long time in hot gas defrosting operation.

Other objects and advantages of the present invention will be set forth below and will be learned by way of example of the present invention. Further, the objects and advantages of the present invention may be realized by means and combinations indicated in the claims.

The present invention is a means for solving the above problems,

The first compressor 10 for compressing the refrigerant, the condenser 11 for condensing the compressed refrigerant, the first expansion valve 12 for making the condensed refrigerant into a low pressure state, and the first expansion valve 12 to evaporate the refrigerant a high-temperature side refrigeration unit 100 comprising a cascade condenser 13;

A refrigerant different from that of the high-temperature side refrigeration unit 100 is used, and the second compressor 20 compresses the refrigerant, and the refrigerant compressed through the second compressor 20 is used in the condenser of the high-temperature side refrigerating unit 100 . (11) and the cascade condenser 13 are condensed and then flowed in, and the refrigerant that has passed through the second expansion valve 21 and the second expansion valve 21, which are in a low pressure form, is evaporated to obtain medicines and pharmaceutical samples. a low-temperature-side refrigeration unit 200 comprising a unit cooler 22 serving as an evaporator to refrigerate up to a preset low-temperature range; consists of,

The refrigerant of the low-temperature side refrigeration unit 200 is condensed while continuously passing through the condenser 11 and the cascade condenser 13 of the high-temperature side refrigeration unit 100 to increase the amount of condensed heat. It is characterized in that it facilitates this.

As described above, in the present invention, the amount of heat of condensation is increased compared to the existing binary refrigeration system, and thus, there is an effect of enabling more efficient low-temperature freezing (such as minus 70 degrees Celsius) of medicines and pharmaceutical samples.

In addition, the present invention has the effect of increasing the life of the compressor of the low-temperature side refrigeration unit even during the hot gas defrosting operation, so that the hot gas defrosting operation is possible for a long time.

1 is a refrigerant flow chart of an embodiment showing a refrigeration operation of a dual refrigeration device for storing low-temperature medicines according to the present invention.
Figure 2 is a refrigerant flow chart of a temporary embodiment showing the hot gas defrosting operation of the dual refrigeration device for low temperature storage of medicines according to the present invention.

Before describing various embodiments of the present invention in detail, it is to be understood that the application is not limited to the details of the construction and arrangement of components described in the following detailed description or shown in the drawings. The invention is capable of being embodied and practiced in other embodiments and of being carried out in various ways. Also, device or element orientation (eg "front", "back", "up", "down", "top", "bottom") The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are used merely to simplify the description of the invention, and the associated apparatus Or it will be appreciated that it does not simply indicate or imply that an element must have a particular orientation. Also, terms such as “first” and “second” are used in this application and the appended claims for the purpose of description and are not intended to indicate or imply relative importance or spirit.

In order to achieve the above object, the present invention has the following features.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

Hereinafter, with reference to FIGS. 1 and 2, a dual refrigeration device for low temperature storage of medicines according to a preferred embodiment of the present invention will be described in detail.

The dual refrigeration apparatus for storing medicines at a low temperature according to the present invention includes a high-temperature side refrigeration unit 100 and a low-temperature side refrigeration unit 200 .

The high-temperature side refrigeration unit 100 includes a first compressor 10 that compresses a gaseous refrigerant (first refrigerant) into a high-temperature and high-pressure gas, and a condenser 11 that condenses the compressed high-temperature and high-pressure gaseous refrigerant into a liquid refrigerant. , the first expansion valve 12 for making the condensed refrigerant into a low pressure state, and a cascade condenser 13 that evaporates the refrigerant that has passed through the first expansion valve 12 to produce a low-temperature and low-pressure gaseous refrigerant. has a circulating form. (The first compressor 10 -> the condenser 11 -> the first expansion valve 12 -> the cascade condenser (evaporator) 13. The refrigerant circulates in the order, and the line through which the refrigerant is circulated is refrigerated on the high temperature side. It is called the sub line (L1).)

In the case of the low-temperature side refrigeration unit 200, a refrigerant (second refrigerant) different from that of the high-temperature side refrigeration unit 100 is used, and a second compressor 20 for compressing the refrigerant and the second compressor 20 are used. The refrigerant compressed through the condenser 11 and the cascade condenser 13 of the high-temperature side refrigeration unit 100 is condensed and then introduced into the second expansion valve 21 and the second expansion valve to become a low pressure type. By evaporating the refrigerant that has passed through (21), it consists of a unit cooler 22 that serves as an evaporator so that medicines and pharmaceutical samples can be frozen to a preset low temperature range. (second compressor 20 -> condenser (11) -> cascade condenser (13) -> second expansion valve (21) -> unit cooler (evaporator) 22, the refrigerant circulates in the order It is called L2).)

That is, in the case of the low-temperature side refrigeration unit 200, the unit cooler 22 part freezes and stores medicines and medicine samples in a preset low temperature range (ex: movie 70 degrees), and in the existing binary refrigeration system, a cascade condenser Contrary to the common use of only (13), in the present invention, the refrigerant of the low-temperature side refrigeration unit 200 passes through the condenser 11 and the cascade condenser 13 of the high-temperature side refrigeration unit 100 successively to the secondary is condensed over the, compared to the existing binary refrigeration system, the amount of heat of condensation is increased and the condensing pressure is reduced, thereby relieving the load of the first compressor 10 of the high-temperature side refrigeration unit 100, and at the same time, the low temperature in the binary refrigeration cycle This is to make freezing easier and easier than before.

In addition, the hot gas defrost operation (Hot gas defrost operation is a widely known term as one of the types of defrost operation such as electricity, hot gas, and stop) in the present invention as described above is shown in FIG. ,

The cascade condenser 13 of the high-temperature side refrigerating unit 100 while the respective refrigerants of the first compressor 10 of the high-temperature side refrigerating unit 100 and the second compressor 20 of the low-temperature side refrigerating unit 200 are circulated, respectively. and the unit cooler 22 of the low-temperature side refrigeration unit 200 are each defrosted.

At this time, in the present invention, in the case of the accumulator 30 installed in the conduit between the evaporator and the second compressor 20 in the low-temperature side refrigeration unit 200 , the first compressor 10 of the high-temperature side refrigeration unit 100 and A circulation line (L3) is provided so that a portion of the refrigerant branched between the cascade condensers 13 is circulated and heat exchanged with the refrigerant of the low-temperature side refrigeration unit 200,

By evaporating the liquid refrigerant that is a part of the refrigerant flowing into the second compressor 20 of the low-temperature side refrigeration unit 200 and making it into a gaseous refrigerant, the refrigerant flows into the second compressor 20 in a complete gaseous state. Damage to the second compressor 20 that is caused by the inflow of the refrigerant in a liquid form rather than a gaseous phase into the existing second compressor 20 is prevented in advance, and as such damage to the second compressor 20 is prevented, The duration and lifespan of the hot gas defrost operation can be increased (the long continuation of the hot gas defrost operation is more required because the amount of heat of condensed heat is increased and the low-temperature freezing efficiency is increased, so frost can be generated more by that much.) it was made to

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and changes are possible within the scope of equivalents of the claims to be described.

10: first compressor 11: condenser
12: first expansion valve 13: cascade condenser
20: second compressor 21: second expansion valve
22: evaporator 30: accumulator
100: high-temperature side refrigeration unit 200: low-temperature side refrigeration unit
L1: High-temperature side refrigeration line L2: Low-temperature side refrigeration line
L3: circulation line

Claims (2)

The first compressor 10 for compressing the refrigerant, the condenser 11 for condensing the compressed refrigerant, the first expansion valve 12 for making the condensed refrigerant into a low pressure state, and the first expansion valve 12 to evaporate the refrigerant a high-temperature side refrigeration unit 100 comprising a cascade condenser 13;
A refrigerant different from that of the high-temperature side refrigeration unit 100 is used, and a second compressor 20 that compresses the refrigerant, and the refrigerant compressed through the second compressor 20 is a condenser of the high-temperature side refrigerating unit 100 . (11) and the cascade condenser 13, condensed and then introduced, and evaporates the refrigerant passing through the second expansion valve 21 and the second expansion valve 21, which are in a low-pressure form, to obtain medicines and pharmaceutical samples. a low-temperature-side refrigeration unit 200 comprising a unit cooler 22 serving as an evaporator to refrigerate up to a preset low-temperature range; consists of,
By continuously passing through the condenser 11 and the cascade condenser 13 of the high-temperature side refrigeration unit 100, the refrigerant of the low-temperature side refrigeration unit 200 is condensed to increase the amount of condensed heat. A dual refrigeration device for low-temperature storage of pharmaceuticals, characterized in that it facilitates this.
The method of claim 1,
When hot gas defrost operation is in progress,
Each refrigerant of the first compressor 10 of the high-temperature side refrigeration unit 100 and the second compressor 20 of the low-temperature side refrigeration unit 200 circulates, respectively, while the cascade condenser 13 and the unit cooler 22 each defrosted,
In the case of the accumulator 30 installed in the conduit between the evaporator and the second compressor 20 in the low-temperature side refrigeration unit 200 , the first compressor 10 and the cascade condenser 13 of the high-temperature side refrigeration unit 100 ) A circulation line (L3) is provided so that a portion of the refrigerant branched therebetween is circulated and heat exchanged with the refrigerant of the low-temperature side refrigeration unit 200,
The liquid refrigerant in the refrigerant phase flowing into the second compressor 20 of the low-temperature side refrigeration unit 200 evaporates as a gaseous refrigerant and flows into the second compressor 20 to prevent damage to the second compressor 20 and , A dual refrigeration device for low temperature storage of pharmaceuticals, characterized in that the duration of the hot gas defrost operation can be increased.

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