KR-20260067443-A - ULTRA COLD FREEZER

KR20260067443AKR 20260067443 AKR20260067443 AKR 20260067443AKR-20260067443-A

Abstract

The present invention relates to an ultra-low temperature refrigeration device, and provides an ultra-low temperature refrigeration device comprising: a cooling storage tank for cooling and refrigeration; an ultra-low temperature cooling unit that forms an ultra-low temperature cooling cycle for cooling the cooling storage tank to an ultra-low temperature; a composite heat exchanger that exchanges heat with the ultra-low temperature cooling cycle for operating the ultra-low temperature cooling unit; a high temperature cooling unit that forms a high temperature cooling cycle to cool the cooling storage tank to a high temperature; and a vibration damping unit provided in the composite heat exchanger to reduce vibration according to the flow rate of the refrigerant.

Inventors

이순석
홍현진
김상대

Assignees

주식회사 현진금속

Dates

Publication Date: 20260513
Application Date: 20241104

Claims (9)

Cooling storage for cooling and freezing; A cryogenic cooling unit forming a cryogenic cooling cycle for cooling the above-mentioned cooling reservoir to an ultra-low temperature; A high-temperature cooling unit having a composite heat exchanger that exchanges heat with the ultra-low temperature cooling cycle for the operation of the ultra-low temperature cooling unit, and forming a high-temperature cooling cycle to cool the cooling reservoir to a high temperature; and A cryogenic refrigeration device characterized by including a vibration damping unit provided in the above-mentioned composite heat exchanger to reduce vibration according to the flow rate of the refrigerant.
In Article 1, The above composite heat exchanger comprises: a first heat exchanger tube formed in the high-temperature cooling section; and It includes a second heat exchange tube provided inside the first heat exchange tube and formed in the ultra-low temperature cooling section, The ultra-low temperature refrigeration device is characterized by the above-mentioned vibration damping part including a contact portion where the inner diameter of the first heat exchange tube and the outer diameter of the second heat exchange tube come into contact with each other.
In Paragraph 2, The ultra-low temperature refrigeration device is characterized in that the above-mentioned contact portion is formed by a compression process of the first heat exchange tube while the second heat exchange tube is inserted into the first heat exchange tube.
In Paragraph 3, The above-mentioned contact portion is characterized by the mutually opposing surfaces of the first heat exchange tube being pressed toward the second heat exchange tube so that the inner diameter of the first heat exchange tube is in close contact with the outer diameter of the second heat exchange tube.
In Paragraph 3, The above-mentioned contact portion is characterized by a plurality of radial surfaces of the first heat exchange tube being compressed toward the second heat exchange tube so that the inner diameter of the first heat exchange tube is in close contact with the outer diameter of the second heat exchange tube.
In Paragraph 3, The ultra-low temperature refrigeration device is characterized by the above-mentioned contact portions being formed in a plurality of portions spaced apart along the longitudinal direction of the first heat exchange tube.
In Article 1, The above-described composite heat exchanger is provided on the bottom surface of the cooling storage tank and is characterized by being insulated by foaming, forming an ultra-low temperature refrigeration device.
In Article 1, The above-described composite heat exchanger is arranged parallel to the bottom surface of the cooling storage tank and is formed by being wound in a spiral shape, characterized by being an ultra-low temperature refrigeration device.
In Article 1, The above-described composite heat exchanger is arranged parallel to the bottom surface of the cooling storage tank, formed by being wound in a spiral shape, and formed to slope downward toward the center, characterized by being an ultra-low temperature refrigeration device.

Description

Ultra Cold Freezer The present invention relates to an ultra-low temperature refrigeration device, and more specifically, to an ultra-low temperature refrigeration device capable of optimizing refrigeration efficiency by optimizing a composite heat exchanger. Generally, a refrigerator is equipped with a compressor, a condenser, an expander, and an evaporator. As the refrigerant circulates through the compressor, condenser, expander, and evaporator, it implements a cooling cycle by undergoing compression, condensation, expansion, and evaporation, thereby cooling the storage compartment. Recently, the use of low-temperature freezers for freezing various types of products, such as pharmaceuticals, is becoming increasingly common. Low-temperature freezers are designed for temperatures of -80°C or lower and are used to store not only food but also bioreagents such as DNA, RNA, and proteins to prevent performance and quality degradation or to maintain their freshness. Furthermore, low-temperature freezing can be implemented using various freezing methods. However, the conventional low-temperature freezer described above is capable only of ultra-low temperature cooling and cannot be used for general low-temperature refrigeration and freezing, and has the problem that the heat exchange efficiency of the high-temperature cooling section is reduced due to the limited installation space. Therefore, there is a need to improve this. Meanwhile, Korean registered patent No. 10-0574864 (registration date: April 21, 2006) discloses a "method for controlling the operation of a two-stage refrigeration cycle." FIG. 1 is a block diagram illustrating an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 2 is a diagram showing an ultra-low temperature cooling cycle of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 3 is a diagram showing a high-temperature cooling cycle of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 4 is a perspective view for explaining an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 6 is a diagram showing the arrangement of a high-temperature evaporator and a low-temperature evaporator of a low-temperature refrigeration device according to one embodiment of the present invention. FIG. 7 is a drawing showing the arrangement of a composite heat exchanger of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 8 is a plan view of a composite heat exchanger according to one embodiment of the present invention. FIG. 9 is a cross-sectional view of a composite heat exchanger of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 10 is a drawing showing a first modified example of a composite heat exchanger of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 11 is a drawing showing a second modified example of a composite heat exchanger of an ultra-low temperature refrigeration device according to one embodiment of the present invention. FIG. 12 is a drawing showing a third modified example of a composite heat exchanger of an ultra-low temperature refrigeration device according to one embodiment of the present invention. Hereinafter, a preferred embodiment of an ultra-low temperature refrigeration device according to an embodiment of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined in consideration of their functions in the present invention, and these may vary depending on the intent or practice of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is a block diagram for explaining an ultra-low temperature refrigeration device according to an embodiment of the present invention, FIG. 2 is a diagram showing an ultra-low temperature cooling cycle of an ultra-low temperature refrigeration device according to an embodiment of the present invention, FIG. 3 is a diagram showing a high temperature cooling cycle of an ultra-low temperature refrigeration device according to an embodiment of the present invention, FIG. 4 is a perspective view for explaining an ultra-low temperature refrigeration device according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view for explaining an ultra-low temperature refrigeration device according to an embodiment of the present inv