CN213454356U - Ultralow temperature cascade refrigeration system of constant temperature bath - Google Patents
Ultralow temperature cascade refrigeration system of constant temperature bath Download PDFInfo
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- CN213454356U CN213454356U CN202021897262.XU CN202021897262U CN213454356U CN 213454356 U CN213454356 U CN 213454356U CN 202021897262 U CN202021897262 U CN 202021897262U CN 213454356 U CN213454356 U CN 213454356U
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Abstract
The utility model discloses embodiment provides an ultra-low temperature cascade refrigerating system of constant temperature tank belongs to refrigeration technology field. The refrigeration system includes: the low-pressure-level refrigeration module, the high-pressure-level refrigeration module and the tubular heat exchanger are connected with the low-pressure-level refrigeration module and the high-pressure-level refrigeration module. The utility model provides an ultra-low temperature overlapping formula refrigerating system of constant temperature tank constitutes refrigerating system through the structure that adopts low pressure level refrigeration module, high-pressure machine refrigeration module and tubular heat exchanger, has reduced the volume of equipment, has solved the huge technical problem of equipment volume that overlapping formula refrigerating system leads to because of the structure is complicated among the prior art, has realized reducing the purpose of refrigerating system volume.
Description
Technical Field
The utility model relates to a cryogenic refrigeration field specifically relates to an ultra-low temperature cascade refrigerating system of constant temperature tank.
Background
The thermostatic bath is one of the apparatuses commonly used in the research field. In order to achieve the purpose of refrigeration at a normal low temperature, a cascade structure is often adopted as a refrigeration system of a thermostatic bath in the prior art. However, the conventional cascade structure is complicated and large in volume, which results in the thermostat occupying a large area of the laboratory.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultra-low temperature cascade refrigerating system of constant temperature tank, this refrigerating system simple structure can realize the cryogenic purpose of ultra-low temperature with little volume equipment.
In order to achieve the above object, an embodiment of the present invention provides an ultra-low temperature cascade refrigeration system of a thermostatic bath, the refrigeration system includes:
a low-pressure stage refrigeration module,
high pressure stage refrigeration module, and
and the tubular heat exchanger is connected with the low-pressure-level refrigeration module and the high-pressure-level refrigeration module.
Optionally, the low pressure stage refrigeration module comprises:
one end of the low-pressure stage steam type compressor is connected with the first end of the tubular heat exchanger;
one end of the low-pressure stage plate type heat exchanger is connected with the other end of the low-pressure stage steam type compressor; and
and one end of the low-pressure stage expansion valve is connected with the other end of the low-pressure stage plate type heat exchanger, and the other end of the low-pressure stage expansion valve is connected with the second end of the tubular heat exchanger.
Optionally, the high pressure stage refrigeration module comprises:
one end of the high-pressure stage steam type compressor is connected with the third end of the tubular heat exchanger;
the tubular evaporator is arranged on site, and one end of the tubular evaporator is connected with the other end of the high-pressure stage steam compressor; and
and one end of the high-pressure-stage capillary tube is connected with the other end of the tubular evaporator, and the other end of the high-pressure-stage capillary tube is connected with the fourth end of the tubular heat exchanger.
Optionally, the low pressure stage vapor compressor comprises at least one of a fully hermetic compressor, a semi-hermetic compressor, a vertical compressor, and a horizontal compressor.
Optionally, the low-pressure stage expansion valve comprises an expansion valve equivalent throttling device or a plurality of groups of throttling devices.
Optionally, the low pressure stage refrigeration module employs R507A refrigerant.
Optionally, the high pressure stage steam compressor comprises at least one of a fully hermetic compressor, a semi-hermetic compressor, a vertical compressor, and a horizontal compressor.
Optionally, the high-pressure stage expansion valve includes an expansion valve equivalent throttling device or multiple sets of throttling devices.
Optionally, the high pressure stage refrigeration module employs R508B refrigerant.
Through the technical scheme, the utility model provides an ultra-low temperature cascade refrigeration system of constant temperature tank constitutes refrigerating system through the structure that adopts low pressure level refrigeration module, high-pressure machine refrigeration module and tubular heat exchanger, has reduced the volume of equipment, has solved among the prior art cascade refrigeration system because of the structure complicated huge technical problem of equipment volume that leads to, has realized reducing the purpose of refrigerating system volume.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
fig. 1 is a block diagram of a construction of an ultra-low-temperature cascade refrigeration system of a thermostatic bath according to an embodiment of the present invention;
fig. 2 is a block diagram of the ultra-low-temperature cascade refrigeration system of the thermostatic bath according to an embodiment of the present invention.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is merely for purposes of illustration and explanation and is not intended to limit the embodiments of the present invention.
In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, and bottom" is generally used with respect to the orientation shown in the drawings or the positional relationship between the components in the vertical, or gravitational direction.
In addition, if there is a description in the embodiments of the present invention referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments can be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a schematic structural view of an ultra-low temperature cascade refrigeration system of a thermostatic bath according to an embodiment of the present invention. In fig. 1, the refrigeration system may include a low pressure stage refrigeration module 10, a high pressure stage refrigeration module 20, and a tubular heat exchanger 30. The tubular heat exchanger 30 may be connected to the low-pressure stage refrigeration module 10 and the high-pressure stage refrigeration module 20, respectively.
In one embodiment of the present invention, various configurations known to those skilled in the art are possible for the low pressure stage refrigeration module 10. In a preferred example of the present invention, as shown in fig. 2, the low pressure stage refrigeration module 10 may include a low pressure stage steam compressor 11, a low pressure stage plate heat exchanger 12, and a low pressure stage expansion valve 13. Wherein, one end of the low-pressure stage steam type compressor 11 can be connected with the first end of the tubular heat exchanger 30; the other end of the low-pressure stage steam type compressor 11 can be connected with one end of the low-pressure stage plate type heat exchanger 12; the other end of the low-pressure stage plate heat exchanger 12 may be connected to one end of a low-pressure stage expansion valve 13; the other end of the low pressure stage expansion valve 13 may be connected to a second end of the tube heat exchanger 30.
In one embodiment of the present invention, various configurations known to those skilled in the art are possible for the high pressure stage refrigeration module 20. In a preferred example of the present invention, as shown in fig. 2, the high-pressure stage refrigeration module 20 may include a high-pressure stage vapor compressor 21, a tube evaporator 22, and a high-pressure stage capillary tube 23. Wherein, one end of the high-pressure stage steam compressor 21 can be connected with the third end of the tubular heat exchanger 30; the other end of the high-pressure stage steam compressor 21 may be connected to one end of the tube evaporator 22; the other end of the tube evaporator 22 may be connected to one end of a high pressure stage capillary 23; the other end of the high-pressure stage capillary tube 23 may be connected to a fourth end of the tube heat exchanger 30.
During operation of the refrigeration system as shown in fig. 2, the low-pressure stage refrigeration module 10 is first activated to cool the tubular heat exchanger 30. However, since the low-pressure stage refrigeration module 10 has a limited refrigeration capacity (typically, a limit temperature of-40 ℃), and the low-pressure stage refrigeration module 10 has a low refrigeration efficiency even at an ultra-low temperature. Thus, the high pressure stage refrigeration module 20 can be started up in the event that the temperature of the tubular heat exchanger 30 drops to-5 ℃. In this case, the tube heat exchanger 30 serves as a condenser in the high-pressure stage refrigeration module 20, while the tube evaporator 22 serves as a heat exchanger. The purpose of ultra-low temperature refrigeration is achieved by the simple structure composed of the high-pressure stage refrigeration module 20, the low-pressure stage refrigeration module 10 and the tubular heat exchanger 30.
In one embodiment of the present invention, the low pressure stage steam compressor 11 and the high pressure stage steam compressor 21 may be at least one of a fully enclosed type compressor, a semi enclosed type compressor, a vertical type compressor and a horizontal type compressor, which are known to those skilled in the art.
In one embodiment of the present invention, the low-pressure stage expansion valve 13 and the high-pressure stage expansion valve 23 may be equivalent expansion devices or multiple sets of expansion devices known to those skilled in the art.
In addition, considering that the conventional R22 refrigerant has satisfactory levels of cooling effect and heating energy efficiency ratio, the use of R22 with high greenhouse effect index GWP of 1760 leads to an increase in greenhouse effect. Thus, in one embodiment of the present invention, the low pressure stage refrigeration module 10 may employ R507A refrigerant. Similarly, the high pressure stage refrigeration module 20 may also employ R508B refrigerant.
Through the technical scheme, the utility model provides an ultra-low temperature cascade refrigeration system of constant temperature tank constitutes refrigerating system through the structure that adopts low pressure level refrigeration module, high-pressure machine refrigeration module and tubular heat exchanger, has reduced the volume of equipment, has solved among the prior art cascade refrigeration system because of the structure complicated huge technical problem of equipment volume that leads to, has realized reducing the purpose of refrigerating system volume.
The above describes in detail optional embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details of the above embodiments, and the technical concept of the embodiments of the present invention can be within the scope of the present invention, and can be modified in a variety of ways, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different embodiments of the present invention can be combined arbitrarily, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the embodiments do not depart from the spirit of the embodiments of the present invention.
Claims (9)
1. An ultra-low temperature cascade refrigeration system of a thermostatic bath, characterized in that the refrigeration system comprises:
a low-pressure stage refrigeration module,
high pressure stage refrigeration module, and
and the tubular heat exchanger is connected with the low-pressure-level refrigeration module and the high-pressure-level refrigeration module.
2. The refrigeration system of claim 1 wherein the low pressure stage refrigeration module comprises:
one end of the low-pressure stage steam type compressor is connected with the first end of the tubular heat exchanger;
one end of the low-pressure stage plate type heat exchanger is connected with the other end of the low-pressure stage steam type compressor; and
and one end of the low-pressure stage expansion valve is connected with the other end of the low-pressure stage plate type heat exchanger, and the other end of the low-pressure stage expansion valve is connected with the second end of the tubular heat exchanger.
3. The refrigeration system of claim 1, wherein the high pressure stage refrigeration module comprises:
one end of the high-pressure stage steam type compressor is connected with the third end of the tubular heat exchanger;
the tubular evaporator is arranged on site, and one end of the tubular evaporator is connected with the other end of the high-pressure stage steam compressor; and
and one end of the high-pressure-stage capillary tube is connected with the other end of the tubular evaporator, and the other end of the high-pressure-stage capillary tube is connected with the fourth end of the tubular heat exchanger.
4. The refrigeration system of claim 2, wherein the low pressure stage vapor compressor comprises at least one of a fully hermetic compressor, a semi-hermetic compressor, a vertical compressor, and a horizontal compressor.
5. The refrigerant system as set forth in claim 2, wherein said low pressure stage expansion valve includes an expansion valve equivalent throttling device or a plurality of sets of throttling devices.
6. The refrigerant system as set forth in claim 1, wherein said low pressure stage refrigerant module utilizes R507A refrigerant.
7. The refrigeration system of claim 3, wherein the high pressure stage vapor compressor comprises at least one of a fully hermetic compressor, a semi-hermetic compressor, a vertical compressor, and a horizontal compressor.
8. The refrigerant system as set forth in claim 3, wherein said high pressure stage expansion valve includes an expansion valve equivalent throttling device or multiple sets of throttling devices.
9. The refrigerant system as set forth in claim 1, wherein said high pressure stage refrigerant module utilizes R508B refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021897262.XU CN213454356U (en) | 2020-09-02 | 2020-09-02 | Ultralow temperature cascade refrigeration system of constant temperature bath |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021897262.XU CN213454356U (en) | 2020-09-02 | 2020-09-02 | Ultralow temperature cascade refrigeration system of constant temperature bath |
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| CN213454356U true CN213454356U (en) | 2021-06-15 |
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| CN202021897262.XU Active CN213454356U (en) | 2020-09-02 | 2020-09-02 | Ultralow temperature cascade refrigeration system of constant temperature bath |
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