CN212205242U - Refrigerating and freezing device - Google Patents
Refrigerating and freezing device Download PDFInfo
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- CN212205242U CN212205242U CN202020376261.4U CN202020376261U CN212205242U CN 212205242 U CN212205242 U CN 212205242U CN 202020376261 U CN202020376261 U CN 202020376261U CN 212205242 U CN212205242 U CN 212205242U
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Abstract
The utility model provides a refrigerating and freezing device, which comprises a box body and a refrigerating system, wherein a storage chamber is arranged in the box body; the refrigerating system is a cascade compression refrigerating system and comprises a high-temperature-level refrigerating circulation loop for circulating a first refrigerant and a low-temperature-level refrigerating circulation loop for circulating a second refrigerant; the high-temperature-stage refrigeration circulation loop comprises an evaporation part, and the low-temperature-stage refrigeration circulation loop comprises a low-temperature-stage compressor, a condensation part and a low-temperature-stage evaporator; the evaporation part is thermally connected with the condensation part so as to enable the first refrigerant to absorb heat released by the second refrigerant when flowing through the condensation part when flowing through the evaporation part; the low-temperature evaporator is configured to provide cold energy to the storage chamber; the semiconductor device comprises a semiconductor refrigeration piece, the hot end of the semiconductor refrigeration piece is thermally connected with the low-temperature-level evaporator, and the cold end of the semiconductor refrigeration piece is configured to provide cold energy for the storage compartment when the hot end heats the low-temperature-level evaporator.
Description
Technical Field
The utility model relates to a refrigeration field especially relates to a cold-stored refrigeration device.
Background
At present, the temperature range of the temperature-changing chamber of the refrigerator on the market is adjusted between 8 ℃ and 18 ℃ below zero, and the overall design is more conventional. Along with the gradual promotion of people's standard of living, this kind of warm area refrigerator can not satisfy everybody's demand well, need design the temperature range wider, and the function is more complete, can satisfy the high-end refrigerator of more demands of user, to the save of special precious edible material, exists the demand to the ultra-low temperature compartment in the high-end user market, -60 ℃ basically covers daily meat and melon and fruit vegetables glass state optimum save temperature, provides probably for eating the material to keep fresh for a long time and store.
SUMMERY OF THE UTILITY MODEL
The inventors have proposed a refrigeration and freezing apparatus based on at least a two-stage cascade system in order to meet the market demand.
The utility model provides a refrigerating and freezing device, which comprises a box body and a refrigerating system, wherein a storage chamber is arranged in the box body, and the refrigerating and freezing device also comprises a semiconductor device;
the refrigerating system is a cascade compression refrigerating system and comprises a high-temperature-level refrigerating circulation loop for circulating a first refrigerant and a low-temperature-level refrigerating circulation loop for circulating a second refrigerant;
the high-temperature-stage refrigeration circulation loop comprises an evaporation part, and the low-temperature-stage refrigeration circulation loop comprises a low-temperature-stage compressor, a condensation part and a low-temperature-stage evaporator;
the evaporation part is thermally connected with the condensation part, so that the first refrigerant absorbs heat released by the second refrigerant when flowing through the condensation part when flowing through the evaporation part;
the low-temperature-stage evaporator is configured to provide cold energy to the storage compartment;
the semiconductor device comprises a semiconductor refrigeration piece, the hot end of the semiconductor refrigeration piece is thermally connected with the low-temperature-level evaporator, and the cold end of the semiconductor refrigeration piece is configured to provide cold energy for the storage compartment when the hot end heats the low-temperature-level evaporator.
Optionally, the storage compartment comprises a first storage compartment and a second storage compartment;
the evaporation part is configured to provide cold for the first storage chamber and/or provide cold for the second storage chamber;
the low-temperature-level evaporator is configured to provide cold energy for the second storage chamber, and the cold end of the semiconductor refrigeration piece is configured to provide cold energy for the second storage chamber when the hot end heats the low-temperature-level evaporator.
Optionally, the evaporation part is configured to provide cold energy to the storage compartment, when a target temperature of the storage compartment is lower than a preset temperature, the high-temperature-stage refrigeration cycle is firstly opened, the evaporation part provides cold energy to the storage compartment, so that the temperature of the storage compartment reaches the preset temperature, and then both the high-temperature-stage refrigeration cycle and the low-temperature-stage refrigeration cycle are opened, so that the low-temperature-stage evaporator provides cold energy to the storage compartment, so that the temperature of the storage compartment reaches the target temperature.
Optionally, another storage compartment is further disposed in the box, the high-temperature refrigeration cycle loop further includes a high-temperature evaporator, and the high-temperature evaporator is configured to provide cold energy into the other storage compartment.
Optionally, the low-temperature evaporator is provided at the rear part of the storage chamber, an air duct cover plate is provided between the low-temperature evaporator and the storage chamber, the semiconductor device is provided between the low-temperature evaporator and the air duct cover plate, the cold end is thermally connected to the air duct cover plate, and the hot end is thermally connected to the low-temperature evaporator.
Optionally, a convex heat transfer fin is disposed on the hot end.
Optionally, the low temperature stage refrigeration cycle loop further comprises an expansion device comprising a throttling device and an expansion vessel; the inlet of the throttling device is arranged on a pipeline between the outlet of the low-temperature-stage evaporator and the suction inlet of the low-temperature-stage compressor, the inlet of the expansion container is communicated with the outlet of the throttling device, and the outlet of the expansion container is arranged on a pipeline between the discharge outlet of the low-temperature-stage compressor and the inlet of the condensing part.
Optionally, the evaporation part and the condensation part are integrally formed into a condensation evaporator;
the evaporation part comprises evaporation tubes, the condensation part comprises condensation tubes, the condensation evaporator further comprises fins, and the evaporation tubes and the condensation tubes are mounted on the fins;
the evaporation part is arranged on the lower side of the condensation part, and the refrigerant volume of the evaporation part is larger than that of the condensation part.
Optionally, the condensing evaporator is arranged at the bottom of the first storage compartment, and the low-temperature-level evaporator is arranged at the rear of the second storage compartment; the first storage chamber is arranged at the bottom of the box body.
Optionally, an air duct and an air duct control device are further arranged in the box body, so that the evaporation portion can provide cold energy to the storage compartment in a controlled manner, or the low-temperature-level evaporator can provide cold energy to the storage compartment.
The utility model discloses an among the cold-stored refrigerating plant, because have overlapping formula compression refrigerating system, and through high-temperature refrigeration cycle's evaporation portion, low-temperature stage refrigeration cycle return circuit's low-temperature stage evaporimeter refrigerates to corresponding storing compartment, can reach extremely low temperature, satisfies user diversified demand. The inventor discovers that because the temperature is low, it is big to change the frost temperature rise, and is higher to heater strip power and room temperature fluctuation requirement, influences indoor food quality between, the utility model discloses a set up semiconductor device, the hot-end heating evaporimeter behind the circular telegram transmits cold volume to storing room between cold junction cooling duct apron etc to reduce room temperature rise when changing the frost. Alternatively, the semiconductor devices can be individually opened to provide different storage temperatures for the storage compartments.
Further, the utility model discloses an among the cold-stored refrigeration device, expansion device has, and expansion vessel can prevent that low temperature compressor pressure differential is too big when starting, damages the compressor, and pressure differential when can guaranteeing to shut down simultaneously sets up the relief pressure valve and can maintain pressure differential.
Further, the utility model discloses an among the cold-stored refrigerating plant, adopt independent refrigerating system to give the alternating temperature compartment refrigeration, realize that the alternating temperature compartment can reach ultralow temperature, also can set to conventional warm area when not needing the ultralow temperature warm area simultaneously, satisfy the diversified demand of user.
Further, the utility model discloses an among the cold-stored refrigerating plant, when setting up to the ultra-low temperature, need through high temperature level refrigerating system with alternating temperature room precooling to-18 ℃ after for reducing the energy consumption, close the alternating temperature air door, open low temperature level refrigerating system again, refrigerate alternating temperature room alone.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view of a refrigeration and freezing apparatus according to an embodiment of the present invention;
figure 2 is a schematic view of a refrigeration and freezing apparatus according to an embodiment of the present invention;
figure 3 is a schematic diagram of a cascade compression refrigeration system in a refrigeration chiller according to one embodiment of the present invention;
figure 4 is a schematic diagram of a cascade compression refrigeration system in a refrigeration chiller according to one embodiment of the present invention;
figure 5 is a schematic diagram of a condensing evaporator in the cascade compression refrigeration system of figure 4.
Detailed Description
Fig. 1 is a schematic view of a refrigeration and freezing apparatus according to an embodiment of the present invention. As shown in fig. 1, the embodiment of the present invention further provides a refrigerating and freezing device, which may be a small household refrigerating and freezing device for storing food materials, medicines, or other objects, for example, a refrigerator or an ice chest.
The refrigerating and freezing device comprises a box body 50 and a refrigerating system, wherein a storage chamber is arranged in the box body 50, and the number of the storage chambers can be two, such as a first storage chamber 51 and a second storage chamber 52. Of course, one storage compartment, such as second storage compartment 52, may be provided.
The refrigeration system may be a cascade compression refrigeration system including a high temperature stage refrigeration cycle for circulating a first refrigerant and a low temperature stage refrigeration cycle for circulating a second refrigerant. The high-temperature-stage refrigeration cycle includes an evaporation unit 31, and the low-temperature-stage refrigeration cycle includes a low-temperature-stage compressor 41, a condensation unit 32, and a low-temperature-stage evaporator 43. The evaporation portion 31 is thermally connected to the condensation portion 32 such that the first refrigerant absorbs heat released by the second refrigerant when flowing through the condensation portion 32 when flowing through the evaporation portion 31. That is, the second refrigerant of the low-temperature stage refrigeration cycle circuit is condensed using the cold energy generated from the high-temperature stage refrigeration cycle circuit to make the low-temperature stage evaporator 43 at an ultra-low temperature. The low-temperature stage evaporator 43 is configured to provide cooling energy to the storage compartment.
Further, in some embodiments, the evaporation portion 31 is also configured to provide cooling to the storage compartment. That is, the cold energy may be supplied to the storage compartment only by the low-temperature-stage evaporator 43, or the cold energy may be supplied to the storage compartment by the evaporation portion 31 and the low-temperature-stage evaporator 43 as needed.
When the evaporation part 31 and the low-temperature-stage evaporator 43 are used for supplying cold to the storage chamber: for example, when one storage compartment is provided, such as the second storage compartment 52, the evaporator portion 31 and the low temperature stage evaporator 43 are configured to provide cooling energy to the storage compartment. The box 50 is also provided with an air duct and an air duct control device, and the air duct control device can include an air door to controllably enable the evaporation part 31 to provide cold energy for the storage chamber or enable the low-temperature evaporator 43 to provide cold energy for the storage chamber. Specifically, when the target temperature of the storage compartment is lower than the preset temperature, the high-temperature-stage refrigeration cycle circuit is firstly opened, the evaporation portion 31 supplies cold to the storage compartment, so that the temperature of the storage compartment reaches the preset temperature, and then, when the high-temperature-stage refrigeration cycle circuit and the low-temperature-stage refrigeration cycle circuit are both opened, the low-temperature-stage evaporator 43 supplies cold to the storage compartment, so that the temperature of the storage compartment reaches the target temperature. That is to say, the utility model discloses an among the cold-stored refrigerating plant, when setting up to the ultra-low temperature, need through high temperature level refrigerating system with alternating temperature room precooling to-18 ℃ after for reducing the energy consumption, close the alternating temperature air door, open low temperature level refrigerating system again, refrigerate alternating temperature room alone. The preset temperature can be-18 ℃, and the corresponding preset temperature can also be set according to the capacity of the high-temperature-stage refrigeration cycle loop. When the storage chamber is set to be at the conventional temperature, the high-temperature refrigeration circulation loop is adopted to refrigerate the storage chamber through the conventional air duct. When the condenser-evaporator 30 is defrosted, the low-temperature stage compressor 41 may be stopped, and when the temperature of the condenser-evaporator 30 reaches the start-up temperature, the low-temperature stage compressor 41 may be restarted.
When the evaporation part 31 and the low-temperature-stage evaporator 43 are used for supplying cold to the storage chamber, as shown in fig. 1 and fig. 2, the storage chamber may be at least two, such as a first storage chamber 51 and a second storage chamber 52. The evaporation portion 31 is configured to provide cold to the first storage compartment 51 and/or cold to the second storage compartment 52. The low-temperature stage evaporator 43 is configured to provide cooling energy to the second storage compartment 52. That is, the evaporator 31 can separately provide cold to the first storage compartment 51 and the low-temperature stage evaporator 43 can provide cold to the second storage compartment 52. Alternatively, the evaporation portion 31 may provide cooling energy to the first storage compartment 51, or may provide cooling energy to the second storage compartment 52 by using the air duct and the air duct control device according to the requirement. The ultra-low temperature control of the second storage compartment 52 may be performed by the low-temperature refrigeration cycle, or by the high-temperature refrigeration cycle, which is pre-cooled to a predetermined temperature, and then the low-temperature refrigeration cycle is turned on. The first storage compartment 51 may be a freezing compartment and the second storage compartment 52 may be a temperature-variable compartment. An independent refrigerating system is adopted to refrigerate the variable-temperature chamber, the variable-temperature chamber can reach the ultralow temperature, and the variable-temperature chamber can be set into a conventional temperature zone when the ultralow temperature zone is not needed, so that the diversified requirements of users are met.
As shown in fig. 2, the refrigerating and freezing apparatus further includes a semiconductor device 60. The semiconductor device 60 comprises a semiconductor refrigeration sheet, the hot end of which is thermally connected to the low-temperature-level evaporator 43, and the cold end of which is configured to provide cold to the storage compartment when the hot end heats the low-temperature-level evaporator. The inventor discovers that because the temperature is low, it is big to change the frost temperature rise, and is higher to heater strip power and room temperature fluctuation requirement, influences the indoor food quality between, the utility model discloses a set up semiconductor device 60, the hot-end heating evaporimeter 43 behind the circular telegram transmits cold volume to storing room between the cold junction to reduce room temperature rise when changing the frost. Alternatively, the semiconductor devices 60 may be individually opened to provide different storage temperatures for the storage compartments. When the low-temperature-stage evaporator 43 is configured to provide cooling energy to the second storage compartment 52, the cold end of the semiconductor chilling plate is configured to provide cooling energy to the second storage compartment 52 when the hot end heats the low-temperature-stage evaporator 43. In this embodiment, the box body 50 may have only the second storage compartment 52, may provide cooling energy to the second storage compartment 52 only by the low-temperature-stage evaporator 43, and may also provide cooling energy to the second storage compartment 52 by the evaporation portion 31 and the low-temperature-stage evaporator 43. Optionally, the cabinet may have a first storage compartment 51 and a second storage compartment 52.
The utility model discloses an in some embodiments, low temperature level evaporimeter 43 is provided with the rear portion of room between the storing, is provided with wind channel apron 54 between low temperature level evaporimeter 43 and the storing room, and semiconductor device 60 sets up between low temperature level evaporimeter 43 and wind channel apron 54, cold junction and wind channel apron 54 thermal connection, hot junction and low temperature level evaporimeter 43 thermal connection. The heat end is provided with the convex heat transfer fin, so that the heat dissipation efficiency of the heat end can be improved.
In some embodiments of the present invention, as shown in fig. 3, the high-temperature stage refrigeration cycle further includes a high-temperature stage compressor 21, a condenser 22, a high-temperature stage evaporator 25, and a high-temperature stage throttling device. The outlet of the evaporation unit 31 communicates with the suction port of the high-temperature-stage compressor 21, and the outlet of the high-temperature-stage evaporator 25 communicates with the inlet of the evaporation unit 31. The high-temperature stage throttling device may be disposed on the inlet side of the high-temperature stage evaporator 25. Further, the high-temperature stage throttling means may be two, a first throttling means provided on the inlet side of the high-temperature stage evaporator 25, and a second throttling means provided on the inlet side of the evaporation portion 31. The outlet of the high-temperature stage evaporator 25 communicates with the inlet of the evaporation portion 31 through a second throttling device.
In other embodiments, as shown in fig. 3, the outlet of the evaporation section 31 communicates with the suction port of the high-temperature-stage compressor 21, and the outlet of the high-temperature-stage evaporator 25 communicates with the inlet of the evaporation section 31. The high-temperature stage throttling devices are two, and each is a first throttling device 24 provided on the inlet side of the high-temperature stage evaporator 25 and a second throttling device 26 provided on the inlet side of the evaporation portion 31. And the outlet of the high-temperature stage evaporator 25 and the outlet of the second throttling device 26 are both communicated with the inlet of the evaporation portion 31. The inlets of the first and second throttling devices 24, 26 are connected to the outlet of the condenser 22 through a control valve 23. The control valve 23 may alternatively direct the first refrigerant to the first throttling device 24, or the second throttling device 26, or direct the first refrigerant to both the first throttling device 24 and the second throttling device 26.
In still other embodiments, the outlet of the high temperature stage evaporator 25 and the outlet of the evaporator section 31 are both in communication with the suction inlet of the high temperature stage compressor 21. The high-temperature stage throttling devices are two, and are respectively a first throttling device arranged on the inlet side of the high-temperature stage evaporator 25 and a second throttling device arranged on the inlet side of the evaporation part 31, and inlets of the first throttling device and the second throttling device are connected to an outlet of the condenser 22 through control valves. The control valve may alternatively direct the first refrigerant to the first throttling device, or to the second throttling device, or to direct the first refrigerant to both the first throttling device and the second throttling device.
Further, as shown in fig. 4, the first throttling device 24 and the second throttling device 26 are both capillary tubes. A dew-removing pipe 27 is also provided between the condenser 22 and the control valve 23. The low-temperature-stage refrigeration cycle further includes a low-temperature-stage throttling device 42 provided between the condensing portion 32 and the low-temperature-stage evaporator 43.
Another storage compartment, such as a third storage compartment 53, is disposed in the box 50, and the high-temperature-stage evaporator 25 of the cascade compression refrigeration system is configured to provide cold energy into the third storage compartment 53. The third storage compartment 53 may be a refrigerator compartment.
In some embodiments of the present invention, the low temperature stage refrigeration cycle further includes a heat emitting portion and a heat absorbing portion. The heat radiating portion is disposed between the discharge port of the low-temperature stage compressor 41 and the condensing portion 32, the heat absorbing portion is disposed between the low-temperature stage evaporator 43 and the suction port of the low-temperature stage compressor 41, and the heat radiating portion is thermally connected to the heat absorbing portion so that the second refrigerant entering the heat absorbing portion absorbs heat released from the second refrigerant entering the heat radiating portion when the second refrigerant flows. The heat radiating part and the heat absorbing part enable the second refrigerant in the low-temperature stage refrigeration cycle loop to be heated before flowing into the suction inlet of the compressor, and enable the second refrigerant to enter the space between the condensing parts 32 to be properly cooled, so that the suction temperature of the low-temperature stage compressor 41 can be improved, the load of the evaporation part 31 can be reduced, the low-temperature stage compressor 41 is protected, and the system efficiency is improved. Further, the low-temperature stage refrigeration cycle circuit further includes a plate heat exchanger 44 having a heat absorbing portion and a heat radiating portion. That is, the plate heat exchanger 44 is provided in the low-temperature-stage refrigeration cycle circuit so as to facilitate heat transfer between the heat absorbing portion and the heat radiating portion. In some alternative embodiments of the present invention, the heat transfer can be performed in a winding manner, and the heat absorbing portion and the heat releasing portion are both refrigerant tubes, so that the heat absorbing portion can be wound on the heat releasing portion.
In some embodiments of the present invention, the low temperature stage refrigeration cycle further comprises an expansion device. The expansion means comprise a throttle means 45 and an expansion vessel 46. An inlet of the throttling device 45 is disposed on a pipeline between an outlet of the low-temperature-stage evaporator 43 and a suction inlet of the low-temperature-stage compressor 41, an inlet of the expansion container 46 is communicated with an outlet of the throttling device 45, and an outlet of the expansion container 46 is disposed on a pipeline between a discharge outlet of the low-temperature-stage compressor 41 and an inlet of the condensing portion 42. For example, the throttling device 45 is provided between the outlet of the low-temperature stage evaporator 43 and the expansion vessel 46, or the throttling device 45 is provided between the outlet of the heat absorbing portion and the expansion vessel 46. The expansion tank 46 is provided between the throttle device 45 and the heat radiating portion, or the expansion tank 46 is provided between the throttle device 45 and the inlet of the condensing portion 32. The throttling means 45 is preferably a pressure reducing valve, alternatively the throttling means 45 may be another type of throttling means. The expansion vessel 46 prevents excessive pressure differential during start-up of the low temperature stage compressor 41, which could damage the compressor, while at the same time, ensures a pressure differential during shutdown, and the pressure relief valve maintains the pressure differential.
In some embodiments of the present invention, as shown in fig. 4 and 5, the evaporation portion 31 and the condensation portion 32 are integrally formed as a condensation evaporator 30. The evaporation part 31 includes an evaporation tube, the condensation part 32 includes a condensation tube, the condensation evaporator 30 further includes a fin 33, and the evaporation tube and the condensation tube are mounted on the fin 33. Further, the evaporation portion 31 is disposed below the condensation portion 32, and a refrigerant volume of the evaporation portion 31 is larger than a refrigerant volume of the condensation portion 32. Specifically, the condenser-evaporator 30 is arranged to have 3 rows of tubes in the vertical direction, and two tubes are arranged in and out of the condenser-evaporator, the upper row of tubes is a condensation portion 32, and a second refrigerant of the low-temperature-stage refrigeration cycle loop flows inside the upper row of tubes; the lower two rows of tubes are the evaporator 31 and carry the first refrigerant of the high-temperature stage refrigeration cycle. When the deep cooling mode is started, the lower two rows of evaporation parts 31 cool the upper row of condensation parts 32, so that the condensation temperature of the low-temperature-stage refrigeration cycle loop is reduced, and the refrigeration capacity of the low-temperature-stage evaporator 43 is improved.
The condenser-evaporator 30 can be disposed at the bottom of the box 50, that is, the bottom of the condenser-evaporator 30 is disposed at the lower portion of the first storage compartment 51. The low-temperature stage evaporator 43 and the high-temperature stage evaporator 25 may be respectively disposed at the rear portions of the respective storage compartments. Alternatively, the condensing evaporator 30, the low-temperature stage evaporator 43, and the high-temperature stage evaporator 25 may be respectively disposed at the rear of the corresponding storage compartments.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A refrigerating and freezing device comprises a box body and a refrigerating system, wherein a storage chamber is arranged in the box body;
the refrigerating system is a cascade compression refrigerating system and comprises a high-temperature-level refrigerating circulation loop for circulating a first refrigerant and a low-temperature-level refrigerating circulation loop for circulating a second refrigerant;
the high-temperature-stage refrigeration circulation loop comprises an evaporation part, and the low-temperature-stage refrigeration circulation loop comprises a low-temperature-stage compressor, a condensation part and a low-temperature-stage evaporator;
the evaporation part is thermally connected with the condensation part, so that the first refrigerant absorbs heat released by the second refrigerant when flowing through the condensation part when flowing through the evaporation part;
the low-temperature-stage evaporator is configured to provide cold energy to the storage compartment;
the semiconductor device comprises a semiconductor refrigeration piece, the hot end of the semiconductor refrigeration piece is thermally connected with the low-temperature-level evaporator, and the cold end of the semiconductor refrigeration piece is configured to provide cold energy for the storage compartment when the hot end heats the low-temperature-level evaporator.
2. A refrigerator-freezer according to claim 1,
the storage chamber comprises a first storage chamber and a second storage chamber;
the evaporation part is configured to provide cold for the first storage chamber and/or provide cold for the second storage chamber;
the low-temperature-level evaporator is configured to provide cold energy for the second storage chamber, and the cold end of the semiconductor refrigeration piece is configured to provide cold energy for the second storage chamber when the hot end heats the low-temperature-level evaporator.
3. A refrigerator-freezer according to claim 1,
the evaporation part is configured to provide cold energy for the storage chamber, when the target temperature of the storage chamber is lower than a preset temperature, the high-temperature refrigeration cycle loop is firstly opened, the evaporation part provides the cold energy for the storage chamber, so that the temperature of the storage chamber reaches the preset temperature, then the high-temperature refrigeration cycle loop and the low-temperature refrigeration cycle loop are both opened, and the low-temperature evaporator provides the cold energy for the storage chamber, so that the temperature of the storage chamber reaches the target temperature.
4. A refrigerator-freezer according to claim 1,
the refrigerator is characterized in that the refrigerator body is also internally provided with another storage room, the high-temperature refrigeration cycle loop further comprises a high-temperature evaporator, and the high-temperature evaporator is configured to provide cold energy into the other storage room.
5. A refrigerator-freezer according to claim 1,
the low-temperature-level evaporator is provided with the rear part of the storage chamber, an air duct cover plate is arranged between the low-temperature-level evaporator and the storage chamber, the semiconductor device is arranged between the low-temperature-level evaporator and the air duct cover plate, the cold end is thermally connected with the air duct cover plate, and the hot end is thermally connected with the low-temperature-level evaporator.
6. A refrigerator-freezer according to claim 5,
and the heat end is provided with a convex heat transfer fin.
7. A refrigerator-freezer according to claim 1,
the low temperature stage refrigeration cycle loop further comprises an expansion device, the expansion device comprising a throttling device and an expansion vessel; the inlet of the throttling device is arranged on a pipeline between the outlet of the low-temperature-stage evaporator and the suction inlet of the low-temperature-stage compressor, the inlet of the expansion container is communicated with the outlet of the throttling device, and the outlet of the expansion container is arranged on a pipeline between the discharge outlet of the low-temperature-stage compressor and the inlet of the condensing part.
8. A refrigerator-freezer according to claim 2,
the evaporation part and the condensation part are integrally formed into a condensation evaporator;
the evaporation part comprises evaporation tubes, the condensation part comprises condensation tubes, the condensation evaporator further comprises fins, and the evaporation tubes and the condensation tubes are mounted on the fins;
the evaporation part is arranged on the lower side of the condensation part, and the refrigerant volume of the evaporation part is larger than that of the condensation part.
9. A refrigerator-freezer according to claim 8,
the condensation evaporator is arranged at the bottom of the first storage chamber, and the low-temperature-level evaporator is arranged at the rear part of the second storage chamber; the first storage chamber is arranged at the bottom of the box body.
10. A refrigerator-freezer according to claim 3,
and an air duct control device are further arranged in the box body so as to controllably enable the evaporation part to provide cold energy for the storage chamber or enable the low-temperature-level evaporator to provide cold energy for the storage chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020376261.4U CN212205242U (en) | 2020-03-23 | 2020-03-23 | Refrigerating and freezing device |
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| CN202020376261.4U CN212205242U (en) | 2020-03-23 | 2020-03-23 | Refrigerating and freezing device |
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| CN212205242U true CN212205242U (en) | 2020-12-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503672A (en) * | 2021-06-30 | 2021-10-15 | 澳柯玛股份有限公司 | Ultra-low temperature refrigerating system for refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503672A (en) * | 2021-06-30 | 2021-10-15 | 澳柯玛股份有限公司 | Ultra-low temperature refrigerating system for refrigerator |
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