Refrigeration system for refrigeration and freezing equipment and refrigeration and freezing equipment

Abstract

The present invention provides a refrigeration system for a refrigeration and freezing device and a refrigeration and freezing device. The refrigeration system includes a first compressor, a second compressor, a condenser, an evaporator, an intercooler, a first throttling device, and a second throttling device; the inlet of the condenser is connected to the exhaust port of the first compressor, the outlet of the first throttling device is connected to the inlet of the evaporator, and the outlet of the evaporator is connected to the air intake port of the second compressor; the intercooler includes a first heat exchange part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are thermally connected; the first heat exchange part has a first inlet, a second inlet and a first outlet, the first inlet is connected to the outlet of the second throttling device, the second inlet is connected to the exhaust port of the second compressor, and the first outlet is connected to the air intake port of the first compressor; the second heat exchange part has a third inlet and a second outlet, the second outlet is connected to the inlet of the first throttling device; the third inlet and the inlet of the second throttling device are both connected to the outlet of the condenser.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and in particular to a refrigeration system for a refrigeration and freezing device and a refrigeration and freezing device. Background Art

[0002] At present, the temperature range of the freezer compartment of refrigerators on the market is mostly adjusted between -16 and -24℃, and the overall design is relatively conventional. With the gradual improvement of people's living standards, this type of temperature zone refrigerator can no longer meet everyone's needs well. It is necessary to design high-end refrigerators with a wider temperature range and more complete functions to meet more needs of users. For the preservation of special and precious ingredients, there is a demand for ultra-low temperature compartments in the high-end user market. -60℃ basically covers the most suitable storage temperature for daily meat and fruits and vegetables in the glass state, providing the possibility for long-term preservation of ingredients. Summary of the invention

[0003] In order to meet the market demand, the inventor proposed a refrigeration system for a refrigeration and freezing device and a refrigeration and freezing device, so that the storage compartment can reach an extremely low temperature.

[0004] In one aspect, the present invention provides a refrigeration system for a refrigeration and freezing device, comprising a first compressor, a second compressor, a condenser, an evaporator, an intercooler, a first throttling device, and a second throttling device;

[0005] The inlet of the condenser is communicated with the exhaust port of the first compressor, the outlet of the first throttling device is communicated with the inlet of the evaporator, and the outlet of the evaporator is communicated with the suction port of the second compressor;

[0006] The intercooler includes a first heat exchange portion and a second heat exchange portion, the first heat exchange portion and the second heat exchange portion are thermally connected; and

[0007] The first heat exchange part has a first inlet, a second inlet and a first outlet, the first inlet is communicated with the outlet of the second throttling device, the second inlet is communicated with the exhaust port of the second compressor, and the first outlet is communicated with the suction port of the first compressor;

[0008] The second heat exchange portion has a third inlet and a second outlet, and the second outlet is connected to the inlet of the first throttling device;

[0009] The third inlet and the inlet of the second throttling device are both communicated with the outlet of the condenser.

[0010] Optionally, the refrigeration system further comprises:

[0011] a first bypass line connecting the inlet of the first throttling device and the outlet of the condenser; and

[0012] A valve device is configured to controllably open or close the third inlet and the outlet of the condenser, and controllably open or close the first bypass line.

[0013] Optionally, the refrigeration system further includes a second bypass pipeline connecting the outlet of the evaporator with the suction port of the first compressor.

[0014] Optionally, the intercooler is a shell-and-tube heat exchanger, and the first heat exchange part is arranged on the outside of the second heat exchange part.

[0015] Optionally, the first inlet and the second inlet are configured as the same communication port.

[0016] Optionally, the second throttling device is further used to disconnect the first inlet and the outlet of the condenser; or, the valve device is further configured to controllably open or disconnect the first inlet and the outlet of the condenser.

[0017] Optionally, the valve device comprises a first valve and a second valve, wherein the first valve is installed on a pipeline between the third inlet and an outlet of the condenser, and the second valve is installed on the first bypass pipeline.

[0018] Optionally, cooling fins are arranged outside the first heat exchange part.

[0019] On the other hand, the present invention provides a refrigeration and freezing device, comprising a box body, in which a first storage compartment is arranged, and also comprising any of the above-mentioned refrigeration systems, wherein the evaporator is configured to provide cold energy to the first storage compartment.

[0020] Optionally, a second storage compartment is further provided in the box body, and the first heat exchange part is configured to provide cold air to the second storage compartment.

[0021] In the refrigeration system and the refrigeration and freezing device of the present invention, because the intercooler and the second compressor are provided, the storage compartment can be made to reach an extremely low temperature, thus meeting the market demand for ultra-low temperature compartments.

[0022] Furthermore, in the refrigeration system and the refrigeration and freezing device of the present invention, because they have the first bypass pipeline, the second bypass pipeline and the valve device, when the ultra-low temperature zone is not needed, it can also be set to a conventional temperature zone to meet the diverse needs of users.

[0023] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0025] Figure 1 is a schematic diagram of a refrigeration system in a refrigeration and freezing device according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of an intercooler in the refrigeration system shown;

[0027] Figure 3 is a schematic diagram of a refrigeration and freezing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Figure 1 FIG. 1 is a schematic diagram of a refrigeration system in a refrigeration and freezing device according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a refrigeration system for a refrigeration and freezing device, which includes a first compressor 11, a second compressor 12, a condenser 13, an evaporator 14, an intercooler 20, a first throttling device 15, and a second throttling device 16. The inlet of the condenser 13 is connected to the exhaust port of the first compressor 11, the outlet of the first throttling device 15 is connected to the inlet of the evaporator 14, and the outlet of the evaporator 14 is connected to the air intake port of the second compressor 12. The intercooler 20 includes a first heat exchange part 21 and a second heat exchange part 22, and the first heat exchange part 21 and the second heat exchange part 22 are thermally connected. And the first heat exchange part 21 has a first inlet, a second inlet and a first outlet, the first inlet is connected to the outlet of the second throttling device 16, the second inlet is connected to the exhaust port of the second compressor 12, and the first outlet is connected to the air intake port of the first compressor 11. The second heat exchange part 22 has a third inlet and a second outlet, and the second outlet is connected to the inlet of the first throttling device 15. The third inlet and the inlet of the second throttling device 16 are both connected to the outlet of the condenser 13. The first compressor 11 may also be referred to as a high temperature stage compressor, and the second compressor 12 may also be referred to as a low temperature stage compressor.

[0029] When the refrigeration and freezing device of the embodiment of the present invention is in operation, the first compressor 11 and the second compressor 12 are both turned on, and the refrigerant throttled by the second throttling device 16 and the refrigerant discharged from the second compressor 12 enter the first heat exchange part 21, which can cool the refrigerant in the second heat exchange part 22. The refrigerant in the second heat exchange part 22 enters the first throttling device 15, and then vaporizes in the evaporator 14 to obtain ultra-low temperature, which can achieve extremely low temperature in the storage room and meet the market demand for ultra-low temperature rooms. Although the second compressor 12 can heat the refrigerant, the temperature of the refrigerant formed by mixing it with the refrigerant throttled by the second throttling device 16 is also sufficient to cool the refrigerant in the second heat exchange part 22.

[0030] In some embodiments of the present invention, the refrigeration system further includes a first bypass line 17 and a valve device. The first bypass line 17 connects the inlet of the first throttling device 15 with the outlet of the condenser 13. The valve device is configured to controllably open or close the third inlet and the outlet of the condenser 13, and controllably open or close the first bypass line 17. By providing the first bypass line 17, the refrigeration system can selectively allow the refrigerant entering the evaporator 14 to not pass through the second heat exchange part 22, so that the corresponding storage room can obtain different temperature ranges. The first compressor 11 and the second compressor 12 are started synchronously, which can reduce the overall load of the compressor.

[0031] In some embodiments of the present invention, the refrigeration system further includes a second bypass line 18, which connects the outlet of the evaporator 14 with the air intake of the first compressor 11. Because of the first bypass line 17, the second bypass line 18 and the valve device, when the ultra-low temperature zone is not needed, it can also be set to a conventional temperature zone to meet the diverse needs of users. The second bypass line 18 is set so that the second compressor 12 can be turned on or off according to demand. Further, the second throttling device 16 is also used to disconnect the first inlet and the outlet of the condenser 13. Or, the valve device is also configured to controllably open or disconnect the first inlet and the outlet of the condenser 13. The valve device includes a first valve 31 and a second valve 32, the first valve 31 is installed in the pipeline between the third inlet and the outlet of the condenser 13, and the second valve 32 is installed on the first bypass line 17.

[0032] In some embodiments of the present invention, Figure 2 As shown, the first heat exchange part 21 and the second heat exchange part 22 can be integrally formed. For example, the intercooler 20 is a shell-and-tube heat exchanger, and the first heat exchange part 21 is arranged outside the second heat exchange part 22. The first inlet and the second inlet are arranged as the same connecting port. The first heat exchange part 21 is provided with cooling fins 23 outside.

[0033] Figure 3 Schematic diagram of a refrigeration and freezing device according to an embodiment of the present invention. Figure 3As shown, the present invention also provides a refrigeration and freezing device, which can be a small household refrigeration and freezing device for storing food, medicines, or other items, for example, it can be a refrigerator or a freezer.

[0034] The refrigerator-freezer comprises a housing 40 and a refrigeration system in any of the above-mentioned embodiments. A first storage compartment 41 is provided in the housing 40, and the evaporator 14 is configured to provide cold energy to the first storage compartment 41. The evaporator 14 may be provided at the bottom or rear of the first storage compartment 41. In some further embodiments of the present invention, a second storage compartment 42 is further provided in the housing, and the first heat exchange unit 21 is configured to provide cold energy to the second storage compartment 42. The intercooler 20 may be provided at the rear of the second storage compartment 42.

[0035] The refrigeration and freezing device may be an air-cooled refrigerator, and an air duct and an air duct control device are further provided in the box body 40. The air duct control device may include a damper to control the cold supply to the first storage compartment 41 and the second storage compartment 42 according to demand. The first storage compartment 41 is a freezer / deep freezer, and the second storage compartment 42 is a refrigerator.

[0036] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A refrigeration system for a refrigeration and freezing device, characterized in that: It includes a first compressor, a second compressor, a condenser, an evaporator, an intercooler, a first throttling device and a second throttling device; The inlet of the condenser is communicated with the exhaust port of the first compressor, the outlet of the first throttling device is communicated with the inlet of the evaporator, and the outlet of the evaporator is communicated with the suction port of the second compressor; The intercooler includes a first heat exchange portion and a second heat exchange portion, the first heat exchange portion and the second heat exchange portion are thermally connected; and The first heat exchange part has a first inlet, a second inlet and a first outlet, the first inlet is communicated with the outlet of the second throttling device, the second inlet is communicated with the exhaust port of the second compressor, and the first outlet is communicated with the suction port of the first compressor; The second heat exchange portion has a third inlet and a second outlet, and the second outlet is connected to the inlet of the first throttling device; The third inlet and the inlet of the second throttling device are both communicated with the outlet of the condenser.

2. The refrigeration system according to claim 1, characterized in that: Also includes: a first bypass pipeline connecting the inlet of the first throttling device and the outlet of the condenser; and A valve device is configured to controllably open or close the third inlet and the outlet of the condenser, and controllably open or close the first bypass line.

3. The refrigeration system according to claim 1, characterized in that: Also includes: The second bypass pipeline is connected with the outlet of the evaporator and the suction port of the first compressor.

4. The refrigeration system according to claim 1, characterized in that: The intercooler is a shell-and-tube heat exchanger, and the first heat exchange part is arranged outside the second heat exchange part.

5. The refrigeration system according to claim 1 or 4, characterized in that: The first inlet and the second inlet are configured as the same communication port.

6. The refrigeration system according to claim 2, characterized in that: The second throttling device is further used to disconnect the first inlet and the outlet of the condenser; or, the valve device is further configured to controllably open or disconnect the first inlet and the outlet of the condenser.

7. The refrigeration system according to claim 2, characterized in that: The valve device includes a first valve and a second valve, wherein the first valve is installed on a pipeline between the third inlet and the outlet of the condenser, and the second valve is installed on the first bypass pipeline.

8. The refrigeration system according to claim 1, characterized in that: The first heat exchange part is provided with cooling fins outside.

9. A refrigerator-freezer, comprising a box, wherein a first storage compartment is provided in the box, characterized in that: The refrigeration system according to any one of claims 1 to 8 is further included, wherein the evaporator is configured to provide cooling to the first storage compartment.

10. The refrigerator-freezer according to claim 9, characterized in that: A second storage compartment is further disposed in the box body, and the first heat exchange portion is configured to provide cold air to the second storage compartment.

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