CN215864122U - Compound refrigeration device with defrosting function - Google Patents
Compound refrigeration device with defrosting function Download PDFInfo
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- CN215864122U CN215864122U CN202122237536.3U CN202122237536U CN215864122U CN 215864122 U CN215864122 U CN 215864122U CN 202122237536 U CN202122237536 U CN 202122237536U CN 215864122 U CN215864122 U CN 215864122U
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Abstract
The utility model discloses a composite refrigerating device with a defrosting function, which comprises a precooling unit and a refrigerating unit, wherein the precooling unit is used for cooling the refrigerating unit; the refrigeration unit comprises a second compressor, the second compressor is connected with the oil component through a fourth connecting pipe, the oil component is connected with a second condenser through a fifth connecting pipe, the second condenser is connected with the plate heat exchanger through a sixth connecting pipe, the plate heat exchanger is connected with the cold trap through a seventh connecting pipe, and the cold trap is connected with the second compressor through a eighth connecting pipe; and a branch pipe is arranged on the fifth connecting pipe, an electromagnetic valve is arranged on the branch pipe, one end of the branch pipe is positioned between the second condenser and the oil component, the other end of the branch pipe is arranged on the seventh connecting pipe, and the diameter of the branch pipe is larger than that of the fifth connecting pipe. According to the composite refrigerating device with the defrosting function, after refrigeration is finished, the cold trap is directly heated and defrosted by using the high-temperature refrigerant of the compressor, an electric heating structure is not required to be added, the structure is simplified, and the defrosting cost is reduced.
Description
Technical Field
The utility model relates to the technical field of refrigerating devices, in particular to a composite refrigerating device with a defrosting function.
Background
A freeze dryer is a method of freezing a water-containing substance into a solid state and then sublimating water from the solid state into a gaseous state to remove water and preserve the substance. The freeze dryer is dried at low temperature, does not deform protein, but can lose biological activity of microorganisms and the like, and is particularly suitable for bioactive products, biochemical products, genetic engineering products, blood products and the like with poor thermal stability.
The freeze dryer is provided with a cold trap, and the cold trap absorbs water vapor in the freeze drying bin by physical adsorption through refrigeration, so that the water vapor in the freeze dryer is trapped. After the freeze dryer finishes the freeze-drying work, a layer of thick frost is formed on the surface of the cold trap, and the cold trap needs to be defrosted. The existing cold trap defrosting adopts an electric heating mode to heat a cold trap, thereby achieving the aim of defrosting. The electric heating defrosting is adopted, so that the structural complexity of the freeze dryer is increased, and the defrosting cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a composite refrigerating device with a defrosting function, after refrigeration is finished, a cold trap is directly heated and defrosted by using a high-temperature refrigerant of a compressor, an electric heating structure is not required to be added, the structure is simplified, and the defrosting cost is reduced.
In order to achieve the purpose, the utility model provides a composite refrigerating device with a defrosting function, which comprises a precooling unit and a refrigerating unit, wherein the precooling unit precools the refrigerating unit through a plate-type heat exchanger; the refrigeration unit comprises a compressor II, the compressor II is connected with oil content through a connecting pipe IV, the oil content is connected with a condenser II through a connecting pipe V, the condenser II is connected with the plate heat exchanger through a connecting pipe VI, the plate heat exchanger is connected with the cold trap through a connecting pipe VII, and the cold trap is connected with the compressor II through a connecting pipe VIII; and a branch pipe is arranged on the fifth connecting pipe, an electromagnetic valve is arranged on the branch pipe, one end of the branch pipe is positioned between the second condenser and the oil component, the other end of the branch pipe is arranged on the seventh connecting pipe, and the diameter of the branch pipe is larger than that of the fifth connecting pipe.
Preferably, the oil is connected to the second compressor through a connecting pipe.
Preferably, the fifth connecting pipe is provided with a high-pressure control.
Preferably, the second filter and the second capillary tube are arranged on the seventh connecting tube, and the other end of the branch tube is positioned between the second capillary tube and the cold trap.
Preferably, the precooling unit comprises a first compressor, the first compressor is connected with a first condenser through a first connecting pipe, the first condenser is connected with a first filter through a second connecting pipe, the first filter is connected with a plate heat exchanger through a third connecting pipe, and the plate heat exchanger is connected with the first compressor through a ninth connecting pipe.
Preferably, the connecting pipe III is provided with a capillary tube I.
According to the overlapping refrigerating device with the defrosting function, the precooling unit with the refrigerant with a higher boiling point exchanges heat with the refrigerating unit through the plate heat exchanger, so that the refrigerating capacity of the refrigerant in the refrigerating unit is improved, and the refrigerating effect is improved. The branch pipe arranged on the fifth connecting pipe is provided with the electromagnetic valve, the electromagnetic valve is closed during refrigeration, the electromagnetic valve is opened during defrosting, the high-temperature refrigerant compressed by the second compressor is used for directly heating the cold trap for defrosting, an electric heating structure is not required to be added, the structure is simplified, and the defrosting cost is reduced.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a multiple refrigeration apparatus with a defrosting function according to the present invention.
Reference numerals
1. A first connecting pipe; 2. a second connecting pipe; 3. a third connecting pipe; 4. a fourth connecting pipe; 5. connecting a pipe V; 6. a sixth connecting pipe; 7. a seventh connecting pipe; 8. a eighth connecting pipe; 9. a branch pipe; 10. and a ninth connecting pipe.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Examples
Fig. 1 is a schematic structural diagram of an embodiment of a multiple refrigeration apparatus with a defrosting function according to the present invention. As shown in the figure, the overlapping refrigerating device with the defrosting function comprises a pre-cooling unit and a refrigerating unit, wherein the pre-cooling unit pre-cools the refrigerating unit through a plate heat exchanger. The precooling unit comprises a first compressor, and the first compressor is connected with a first condenser through a first connecting pipe 1. The first condenser is connected with the first filter through a second connecting pipe 2, the first filter is connected with the plate heat exchanger through a third connecting pipe 3, and the plate heat exchanger is connected with the first compressor through a ninth connecting pipe 10. The connecting pipe III 3 is provided with a capillary tube I.
During precooling, the first compressor compresses a low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant, and the compressed high-pressure gaseous refrigerant is sent into the first condenser through the first connecting pipe 1; the first condenser condenses the high-pressure gas refrigerant into a medium-temperature high-pressure liquid refrigerant; the liquid refrigerant with medium temperature and high pressure is filtered by the first filter and then is throttled by the first capillary tube to become the liquid refrigerant with low temperature and low pressure; the refrigerant in the pre-cooling unit has a higher boiling point and is evaporated and absorbed in the plate heat exchanger, so that the refrigerant in the refrigerating unit is pre-cooled; the liquid refrigerant absorbs heat in the plate heat exchanger and becomes a low-pressure gaseous refrigerator, and the low-pressure gaseous refrigerator returns to the first compressor through the connecting pipe nine 10 and is sequentially circulated, so that the cold quantity of the refrigerant in the refrigerating unit is improved, and the refrigerating effect is improved.
The refrigerating unit comprises a second compressor, the second compressor is connected with the oil content through a fourth connecting pipe 4, the oil content is connected with a second condenser through a fifth connecting pipe 5, and the oil content is connected with the second compressor through a second connecting pipe. The oil content is present oil and gas separator, collects the petrol that carries in the gaseous state refrigerator, then sends back compressor two in through the connecting pipe and carries out recycle, reduces the oil consumption. And the connecting pipe five 5 is provided with a high-pressure control device which controls the pressure of the gas sprayed out of the compressor two. The condenser II is connected with the plate heat exchanger through a connecting pipe six 6. And refrigerants in the first condenser and the second condenser are respectively connected with two pipelines inside the plate heat exchanger to exchange heat in the plate heat exchanger. The plate heat exchanger is connected with the cold trap through a connecting pipe seven 7, and a filter II and a capillary II are arranged on the connecting pipe seven 7. The cold trap is connected with the second compressor through a connecting pipe eight 8, and the refrigerant is sent back to the second compressor.
And a branch pipe 9 is arranged on the connecting pipe five 5, and an electromagnetic valve is arranged on the branch pipe 9. One end of the branch pipe 9 is positioned between the second condenser and the oil component, and the other end of the branch pipe 9 is positioned between the second capillary and the cold trap. The diameter of the branch pipe 9 is larger than that of the connection pipe five 5.
During refrigeration, the compressor II compresses the low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant, the compressed high-pressure gaseous refrigerant is sent into the oil component through the connecting pipe five 5, and then the compressed high-pressure gaseous refrigerant is sent into the condenser II through the connecting pipe six 6; the second condenser condenses the high-pressure gas refrigerant into a medium-temperature high-pressure liquid refrigerant; the medium-temperature high-pressure liquid refrigerant enters the plate heat exchanger through a connecting pipe six 6, and is precooled in the plate heat exchanger to become the low-temperature high-pressure liquid refrigerant; then the refrigerant is filtered by a second filter, throttled by a second capillary tube and changed into a low-temperature and low-pressure liquid refrigerant, and enters the cold trap through a seventh connecting pipe 7 to refrigerate the cold trap; the refrigerant after heat exchange in the cold trap returns to the compressor II through a connecting pipe eight 8; and the steps are sequentially and circularly carried out.
When defrosting the cold trap after refrigeration, the electromagnetic valve is opened, and because the diameter ratio of branch pipe 9 is thick, the high-temperature high-pressure gaseous refrigerant compressed by compressor two mainly enters branch pipe 9 through connecting pipe five 5, then enters the cold trap through connecting pipe seven 7, and the high-temperature high-pressure gaseous refrigerant heats the cold trap, thereby achieving the purpose of defrosting rapidly. The refrigerant after heating and defrosting the cold trap returns to the compressor II through the connecting pipe eight 8 for next compression; the complete defrosting of the cold trap is completed by the circulation.
Therefore, the utility model adopts the composite refrigerating device with the defrosting function, after the refrigeration is finished, the high-temperature refrigerant of the compressor is used for directly heating the cold trap for defrosting, the electric heating structure is not required to be added, the structure is simplified, and the defrosting cost is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the utility model without departing from the spirit and scope of the utility model.
Claims (6)
1. A compound refrigeration device with defrosting function, which is characterized in that: the system comprises a precooling unit and a refrigerating unit, wherein the precooling unit precools the refrigerating unit through a plate-type heat exchanger; the refrigeration unit comprises a compressor II, the compressor II is connected with oil content through a connecting pipe IV, the oil content is connected with a condenser II through a connecting pipe V, the condenser II is connected with the plate heat exchanger through a connecting pipe VI, the plate heat exchanger is connected with the cold trap through a connecting pipe VII, and the cold trap is connected with the compressor II through a connecting pipe VIII; and a branch pipe is arranged on the fifth connecting pipe, an electromagnetic valve is arranged on the branch pipe, one end of the branch pipe is positioned between the second condenser and the oil component, the other end of the branch pipe is arranged on the seventh connecting pipe, and the diameter of the branch pipe is larger than that of the fifth connecting pipe.
2. The multi-folding refrigerating device with defrosting function according to claim 1, characterized in that: and the oil content is connected with the second compressor through a connecting pipe.
3. The multi-folding refrigerating device with defrosting function according to claim 1, characterized in that: and the fifth connecting pipe is provided with a high-pressure control.
4. The multi-folding refrigerating device with defrosting function according to claim 1, characterized in that: and a second filter and a second capillary tube are arranged on the seventh connecting tube, and the other end of the branch tube is positioned between the second capillary tube and the cold trap.
5. The multi-folding refrigerating device with defrosting function according to claim 1, characterized in that: the precooling unit comprises a first compressor, the first compressor is connected with a first condenser through a first connecting pipe, the first condenser is connected with a first filter through a second connecting pipe, the first filter is connected with a plate heat exchanger through a third connecting pipe, and the plate heat exchanger is connected with the first compressor through a ninth connecting pipe.
6. The multi-folding refrigerating device with defrosting function according to claim 5, characterized in that: and a first capillary tube is arranged on the third connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122237536.3U CN215864122U (en) | 2021-09-15 | 2021-09-15 | Compound refrigeration device with defrosting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122237536.3U CN215864122U (en) | 2021-09-15 | 2021-09-15 | Compound refrigeration device with defrosting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215864122U true CN215864122U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122237536.3U Active CN215864122U (en) | 2021-09-15 | 2021-09-15 | Compound refrigeration device with defrosting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215864122U (en) |
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2021
- 2021-09-15 CN CN202122237536.3U patent/CN215864122U/en active Active
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