CN212378324U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, which comprises a refrigerator body, wherein a first storage chamber and a second storage chamber are formed inside the refrigerator body, and the refrigerator also comprises a high-temperature refrigeration circulation loop and a low-temperature refrigeration circulation loop; the high-temperature refrigeration circulation loop comprises a control valve, a first evaporator, a second evaporator and an evaporation part, wherein the first evaporator is used for supplying cold to the first storage chamber, and the second evaporator is used for supplying cold to the second storage chamber; the control valve is provided with a first outlet and a second outlet, and the inlet of the first evaporator is communicated with the first outlet; the inlet of the second evaporator is communicated with the second outlet; the outlet of the second evaporator is communicated with the inlet of the evaporation part, and the inlet of the evaporation part is communicated with the inlet of the first evaporator; the low-temperature-level refrigeration cycle loop comprises a condensation part and a third evaporator, the condensation part is thermally connected with the evaporation part, and the third evaporator is used for supplying cold for the second storage compartment. The refrigerator can supply cold to a plurality of storage compartments of the refrigerator, and the refrigerator has a multi-temperature-zone multifunctional storage compartment with deep cooling and conventional refrigeration.

Description

Refrigerator with a door

Technical Field

The utility model relates to a refrigeration storing field especially relates to a refrigerator.

Background

At present, the temperature range of the temperature-changing chamber of the refrigerator on the market is mostly adjusted between 8 ℃ and 18 ℃, and the overall design is more conventional. With the gradual improvement of living standard of people, the refrigerator with the temperature zone can not well meet the requirements of people, a high-end refrigerator which has a wider temperature range and more complete functions and can meet more requirements of users needs to be designed, the food is stored at a glass state below-40 ℃, the food nutritive value can be stored to the maximum extent, the market of the high-end user has the requirement on an ultralow temperature compartment (minus 40 ℃ to minus 60 ℃), and the user experience is grasped tightly for improving the satisfaction degree of the user. For this reason, the conventional cascade compression refrigeration system is generally composed of two separate refrigeration cycles, which are called a high-temperature stage refrigeration cycle (referred to as a high-temperature portion) and a low-temperature stage refrigeration cycle (referred to as a low-temperature portion), respectively. The high temperature portion uses a first refrigerant having a relatively high evaporation temperature, and the low temperature portion uses a second refrigerant having a relatively low evaporation temperature. And a condensing evaporator is adopted, which utilizes the cold energy produced by the first refrigerant in the high-temperature part to condense the second refrigerant vapor discharged by the compressor in the low-temperature part, thereby realizing the low temperature below minus 60 ℃. However, in the partial overlapping type compression refrigeration system in the prior art, the high-temperature stage refrigeration cycle loop is only used for supplying cold to the condenser of the low-temperature stage refrigeration cycle loop, so that the refrigeration efficiency of the overlapping type compression refrigeration system is low, and the conventional deep cooling refrigerator only has a single temperature function, so that the system efficiency is low.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a refrigerator that at least partially solves the above mentioned problems.

The utility model discloses a further purpose improves overlapping formula compression refrigerating system refrigeration efficiency in the refrigerator, makes it can be for the room cooling between a plurality of storing.

The utility model discloses a further purpose makes same storing compartment in the refrigerator obtain different refrigeration effect.

The utility model provides a refrigerator, which comprises a refrigerator body, wherein a first storage chamber and a second storage chamber are formed inside the refrigerator body, and the refrigerator also comprises a high-temperature refrigeration circulation loop and a low-temperature refrigeration circulation loop;

the high-temperature refrigeration circulation loop comprises a control valve, a first evaporator, a second evaporator and an evaporation part, wherein the first evaporator is used for absorbing heat, the first evaporator is used for supplying cold to the first storage compartment, and the second evaporator is used for supplying cold to the second storage compartment;

the control valve has a first outlet and a second outlet, the inlet of the first evaporator being in communication with the first outlet; the inlet of the second evaporator is communicated with the second outlet; and is

The outlet of the second evaporator is communicated with the inlet of the first evaporator, and the inlet of the evaporation part is communicated with the outlet of the first evaporator; or the outlet of the second evaporator is communicated with the inlet of the evaporation part, and the inlet of the evaporation part is communicated with the inlet of the first evaporator;

the low-temperature-level refrigeration cycle loop comprises a condensation part and a third evaporator used for absorbing heat, the condensation part is thermally connected with the evaporation part, and the third evaporator is used for supplying cold to the second storage compartment.

Optionally, the control valve has a third outlet communicating with the inlet of the evaporation portion.

Optionally, a third storage compartment is formed inside the box body, the high-temperature refrigeration cycle loop further comprises a fourth evaporator, the fourth evaporator is arranged between the third outlet and the evaporation part, and the fourth evaporator is used for supplying cold to the third storage compartment.

Optionally, a first throttling device is arranged between the inlet of the first evaporator and the first outlet;

a second throttling device is arranged between the inlet of the second evaporator and the second outlet;

a third throttling device is arranged between the inlet of the fourth evaporator and the third outlet;

the first storage compartment and the second storage compartment are arranged in parallel along the transverse extension direction of the refrigerator, and the third storage compartment is arranged on the upper sides of the first storage compartment and the second storage compartment.

Optionally, a valve is arranged on the outlet pipe of the second evaporator for only allowing the refrigerant from the second evaporator to flow out in one direction.

Optionally, the refrigerator further comprises an air supply device for promoting airflow to flow through the second evaporator and/or the third evaporator and promoting airflow to enter the second storage compartment.

Optionally, the second evaporator includes a first cooling evaporation tube, the third evaporator includes a second cooling evaporation tube, and the first cooling evaporation tube and the second cooling evaporation tube are arranged on the same fin group in a penetrating manner.

Optionally, the second evaporator is arranged on the upper side of the third evaporator, a first refrigerating chamber used for arranging the second evaporator and the third evaporator is further formed at a position, corresponding to the rear side of the second storage compartment, of the box body, and the first refrigerating chamber is communicated with the second storage compartment through a first air supply structure so as to provide refrigerating airflow for the second storage compartment through the first air supply structure.

Optionally, the first air supply structure is arranged between the first refrigeration chamber and the second storage chamber; the air supply device is characterized in that an air inlet is formed in the rear side face of the first air supply structure, a plurality of air supply outlets are formed in the front side face of the first air supply structure, and an air supply air duct is formed in the first air supply structure.

Optionally, a second refrigeration chamber for arranging the first evaporator is further formed in the box body at a position corresponding to the rear side of the first storage compartment, and the second refrigeration chamber is communicated with the first storage compartment through a second air supply structure so as to provide refrigeration air flow to the first storage compartment through the second air supply structure; the evaporation part and the condensation part are arranged in the second refrigerating chamber.

The utility model discloses a refrigerator, be provided with first evaporimeter and second evaporimeter in its high temperature level refrigeration cycle return circuit. The first evaporator and the second evaporator are respectively used for cooling the first storage chamber and the second storage chamber, and a third evaporator is arranged in the low-temperature refrigeration cycle loop and used for cooling the second storage chamber. The energy utilization efficiency in the high-temperature refrigeration cycle loop is improved, and the refrigerator can simultaneously supply cold to a plurality of storage compartments, so that the refrigeration efficiency of the refrigerator is improved. The second evaporator and the third evaporator can both supply cold to the second storage chamber, so that a single storage chamber of the refrigerator has a multi-temperature-zone function, and even if the second storage chamber can obtain different refrigeration effects to meet different refrigeration demands and storage demands, the temperature zone range of the second storage chamber can be enlarged, namely, the refrigerator can have a deep cooling function and meet the energy-saving demand of daily refrigeration.

Further, adopt the mode of forced air cooling to the room cooling of second storing room, can prevent that indoor portion frosting between the second storing, guarantee heat exchange efficiency, and can not bring inconvenience for the user, the forced air cooling does not have the frost promptly, does not have the hidden danger of frosting, improves product result of use and user experience.

Furthermore, the second evaporator and the third evaporator are of an integral structure, can share fins, such as a two-inlet two-outlet double-channel evaporator, and are of an up-and-down structure, when the refrigerator is set to normally operate, the high-temperature refrigeration circulation loop operates, the upper second evaporator refrigerates, and at the moment, the evaporators share the fins of the lower evaporator, so that the heat exchange area is large, and the heat exchange efficiency is high; when the refrigerator is set to operate at the deep cooling mode, the lower third evaporator is connected, the deep cooling system works, the lower evaporator cools, and meanwhile the fins of the upper evaporator are shared, so that the heat exchange area is large, and the heat exchange efficiency is high. The evaporator structure is arranged up and down, so that the heat exchange is uniform. The heat exchange area utilization rate of the evaporator can be ensured, the size of the double-flow evaporator is reduced, the heat exchange is uniform, the pipeline distribution is uniform, and the air duct system and the refrigeration fan are matched, so that two functions of normal-temperature refrigeration and deep-cooling refrigeration are realized, and the energy saving purpose in the conventional refrigeration process can be ensured.

Furthermore, the arrangement positions of each evaporator and the evaporation part in the high-temperature refrigeration circulation loop can ensure the refrigeration efficiency of each evaporator during normal-temperature refrigeration, improve the energy efficiency of the refrigerator and have obvious energy-saving effect.

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 refrigerator according to an embodiment of the present invention;

fig. 2 is a schematic view of a cascade compression refrigeration system in a refrigerator according to an embodiment of the present invention;

fig. 3 is a schematic view of a cascade compression refrigeration system in a refrigerator according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of a refrigerator according to an embodiment of the present invention;

fig. 5 is a partially-sectioned schematic view of a refrigerator according to an embodiment of the present invention;

fig. 6 is a schematic view of a partial structure of a refrigerator according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention. As shown in fig. 1, and referring to fig. 2 to 6, an embodiment of the present invention provides a refrigerator, which may include a cabinet 20 and a refrigeration system. A plurality of storage compartments are formed in the box body 20, and each storage compartment may include a first storage compartment 21, a second storage compartment 22, and a third storage compartment 23. In the refrigerator of the present embodiment, two storage compartments or three storage compartments may be formed in the refrigerator body 20. A refrigeration system, which may also be referred to as a cascade compression refrigeration system, may be disposed within the cabinet 20 and include a high temperature stage refrigeration cycle 30 and a low temperature stage refrigeration cycle 40.

The high-temperature-stage refrigeration cycle circuit 30 is for circulating a first refrigerant, and is provided therein with a control valve 33, and a first evaporator 35, a second evaporator 36, and an evaporation portion 37 for absorbing heat. The first evaporator 35 and the second evaporator 36 serve to cause the first refrigerant flowing therethrough to absorb heat, and to supply cold to the first storage compartment 21 and the second storage compartment 22, respectively. The high temperature stage refrigeration cycle loop 30 also includes a high temperature stage compressor 31 and a high temperature stage condensing unit 32. The low-temperature-stage refrigeration cycle circuit 40 is for circulating the second refrigerant, and is provided therein with a condensing portion 42 and a third evaporator 44. The third evaporator 44 is used for promoting the second refrigerant flowing through the third evaporator to absorb heat and supplying cold to the second storage compartment 22. The low-temperature stage refrigeration cycle circuit 40 also includes a low-temperature stage compressor 41. That is, the high-temperature stage refrigeration cycle circuit 30 may include: a high-temperature stage compressor 31, a high-temperature stage condensing device 32, a control valve 33, an evaporation portion 37, a first evaporator 35, and a second evaporator 36. The low temperature stage refrigeration cycle circuit 40 may include: a low-temperature stage compressor 41, a condenser 42, and a third evaporator 44. The evaporation portion 37 functions to cause the first refrigerant flowing therethrough to absorb heat of the second refrigerant flowing through the condensation portion 42 in the low-temperature-stage refrigeration cycle circuit 40. The first refrigerant and the second refrigerant may be the same refrigerant, such as R600a, or different refrigerants.

The refrigerant, also called refrigerant, usually completes energy conversion by phase change, is a working substance that circulates in a refrigeration system of a refrigeration device, and its working principle is: the refrigerant absorbs heat of a substance to be cooled in the evaporator to evaporate, transfers the absorbed heat to ambient air or water in the condenser to be cooled into liquid, and circulates back and forth to achieve the refrigeration effect by means of state change. The "high temperature" and the "low temperature" in the "high temperature stage refrigeration cycle circuit 30" and the "low temperature stage refrigeration cycle circuit 40" are relative, and the evaporation temperature of the first refrigerant flowing through the high temperature stage refrigeration cycle circuit 30 is higher than the evaporation temperature of the second refrigerant flowing through the low temperature stage refrigeration cycle circuit 40.

The embodiment of the utility model provides a refrigerator, be provided with first evaporimeter 35 and second evaporimeter 36 in its high temperature level refrigeration cycle circuit 30. The first evaporator 35 and the second evaporator 36 are respectively used for cooling the first storage compartment 21 and the second storage compartment 22, and a third evaporator 44 is arranged in the low-temperature refrigeration cycle loop 40 and used for cooling the second storage compartment 22. The energy utilization efficiency in the high-temperature refrigeration cycle loop 30 is improved, and the refrigerator can simultaneously supply cold to a plurality of storage compartments, so that the refrigeration efficiency of the refrigerator is improved. The second evaporator 36 and the third evaporator 44 can both supply cold to the second storage compartment 22, so that a single storage compartment of the refrigerator has a multi-temperature-zone function, even if the second storage compartment 22 can obtain different refrigeration effects to meet different refrigeration requirements, the temperature zone range of the second storage compartment 22 can be expanded, that is, the refrigerator can have a deep cooling function and can meet energy-saving requirements of daily refrigeration.

Preferably, in the embodiment of the present invention, the inlet of the control valve 33 may communicate with the inlet of the high temperature stage condensing device 32. The control valve 33 has a first outlet and a second outlet, the inlet of the first evaporator 35 being in communication with the first outlet; the inlet of the second evaporator 36 communicates with the second outlet. The outlet of the second evaporator 36 communicates with the inlet of the first evaporator 35, and the inlet of the evaporation portion 37 communicates with the outlet of the first evaporator 35. In other embodiments, the outlet of the second evaporator 36 communicates with the inlet of the evaporation portion 37, and the inlet of the evaporation portion 37 communicates with the inlet of the first evaporator 35. The control valve 33 can be a switching valve, and the arrangement positions of each evaporator and the evaporation part 37 in the high-temperature refrigeration cycle loop 30 can ensure the refrigeration efficiency of each evaporator during normal-temperature refrigeration, improve the energy efficiency of the refrigerator and have obvious energy-saving effect.

In some embodiments of the present invention, the control valve 33 has a third outlet, which communicates with the inlet of the evaporation portion 37. The evaporation portion 37 may be operated alone or the evaporation portion 37 and the first evaporator 35 may be operated while the second evaporator 36 is not operated, improving the cryogenic efficiency. Further, the high-temperature-stage refrigeration cycle circuit 30 further includes a fourth evaporator 38, the fourth evaporator 38 is disposed between the third outlet and the evaporation portion 37, and the fourth evaporator 38 is used for the third storage compartment 23. When the evaporation part 37 works, the third storage chamber 23 can be refrigerated at the same time, the working efficiency of the high-temperature refrigeration cycle loop 30 is improved, and the energy-saving effect is obvious.

A first throttling device 341 is arranged between the inlet and the first outlet of the first evaporator 35; a second throttling device 342 is arranged between the inlet and the second outlet of the second evaporator 36; a third throttling means 343 is provided between the inlet and the third outlet of the fourth evaporator 38. In alternative embodiments, a total restriction may be provided at the inlet of the control valve 33. Further, the first, second and third throttling means may each be a capillary tube. Optionally, the first throttling device, the second throttling device and the third throttling device may be electromagnetic expansion valves. The control valve 33 may now be selected as a one-in-many flow divider valve.

In some embodiments of the present invention, the first storage compartment 21 and the second storage compartment 22 are disposed in parallel along the lateral extension direction of the refrigerator, and the third storage compartment 23 is disposed on the upper side of the first storage compartment 21 and the second storage compartment 22. The first storage compartment 21 may be a freezing compartment, the second storage compartment 22 may be a multi-functional compartment having multiple temperature zones, and the third storage compartment 23 may be a refrigerating compartment. The arrangement can ensure that the compartment layout is more reasonable and the corresponding articles can be more conveniently stored and taken.

In some embodiments of the present invention, as shown in fig. 2, 4 and 5, the refrigerator further comprises an air supply device 50 for promoting airflow through the second evaporator 36 and/or the third evaporator 44 and into the second storage compartment 22. In some preferred embodiments, the second evaporator 36 includes a first cooling evaporating tube, and the third evaporator 44 includes a second cooling evaporating tube, and the first cooling evaporating tube and the second cooling evaporating tube are disposed through the same fin group. The second evaporator 36 may form a double tube evaporator with the third evaporator 44 and the fin set through which they pass. That is, the dual tube evaporator has two sets of evaporator tubes, the second evaporator 36 and the third evaporator 44. The second evaporator 36 is disposed on an upper side of the third evaporator 44.

Further, the cabinet 20 is further formed with a first refrigerating compartment 24 for arranging the second evaporator 36 and the third evaporator 44 at a position corresponding to a rear side of the second storage compartment 22, and the first refrigerating compartment 24 is communicated with the second storage compartment 22 through the first air supply structure to provide a refrigerating air flow to the second storage compartment 22 through the first air supply structure.

As shown in fig. 2, 4 and 5, the second evaporator 36 and the third evaporator 44 are of an integral structure, and can share fins, such as two-inlet and two-outlet double-channel evaporators, and the structure is an up-down structure, when the refrigerator is set to operate normally, the high-temperature stage refrigeration cycle 30 operates, the upper second evaporator 36 refrigerates, and at this time, the evaporators share the lower evaporator fins, so that the heat exchange area is large, and the heat exchange efficiency is high; when the refrigerator is set to operate at the deep cooling mode, the lower third evaporator 44 is connected, the deep cooling system works, the lower evaporator cools, and meanwhile the fins of the upper evaporator are shared, so that the heat exchange area is large, and the heat exchange efficiency is high. The evaporator structure is arranged up and down, so that the heat exchange is uniform. The heat exchange area utilization rate of the evaporator can be ensured, the size of the double-flow evaporator is reduced, the heat exchange is uniform, the pipeline distribution is uniform, and the air duct system and the refrigeration fan are matched, so that two functions of normal-temperature refrigeration and deep-cooling refrigeration are realized, and the energy saving purpose in the conventional refrigeration process can be ensured.

In some embodiments of the present invention, as shown in fig. 1 and fig. 6, the box body 20 is further formed with a second refrigerating chamber for arranging the first evaporator 35 at a position corresponding to the rear side of the first storage compartment 21, and the second refrigerating chamber is communicated with the first storage compartment 21 through the second air supply structure 52 so as to provide a refrigerating airflow to the first storage compartment 21 through the second air supply structure 52. The box body 20 is further formed with a third refrigerating chamber for arranging a fourth evaporator 38 at a position corresponding to the rear side of the third storage compartment 23, and the third refrigerating chamber is communicated with the third storage compartment 23 through a third air supply structure so as to provide refrigerating air flow to the third storage compartment 23 through the third air supply structure.

The first air supply structure is arranged between the first refrigerating chamber 24 and the second storage compartment 22; an air inlet is arranged on the rear side surface of the first air supply structure, and an air supply device 50 is arranged at the air inlet. A plurality of air supply ports 54 are provided on the front side surface of the first air supply structure, and an air supply duct 55 is provided in the first air supply structure 51. The lower side of the first air supply structure can be provided with an air return duct 56, so that the evaporator can supply air from the bottom and discharge air from the upper part. The second air blowing structure and the third air blowing structure are similar to the first air blowing structure 51.

As shown in fig. 2 and 3, the outlet pipe of the second evaporator 36 is provided with a valve that allows only the refrigerant from the second evaporator 36 to flow out in one direction. The valve may be a check valve 39, the check valve 39 functioning to prevent reverse passage of the first refrigerant downstream of the check valve 39. When the low temperature stage compressor 41 is operated, the temperature of the third evaporator 44 is low. Due to the close distance between the second evaporator 36 and the third evaporator 44, the temperature of the pipeline of the second evaporator 36 is also low, even significantly lower than the temperature of other evaporators in the high temperature stage refrigeration cycle 30 which are located downstream of the second evaporator 36. The valve can prevent the first refrigerant in other cooling evaporators positioned at the downstream of the second evaporator 36 from flowing into the second evaporator 36 from the discharge port of the second evaporator 36, so that the reverse flow of the first refrigerant in the high-temperature stage refrigeration cycle circuit 30 can be avoided, the effective circulation amount of the first refrigerant is ensured, and the overall refrigeration efficiency is improved.

Taking the example of R600a, when the refrigerant temperature is-50 ℃, the pressure is about 0.017Mpa, the compressor suction pressure of R600a is about 0.06Mpa, and the pressure on the second evaporator 36 side is lower than the suction pressure of the high temperature stage compressor 31, so that the high temperature stage refrigeration cycle circuit is gradually gathered in the second evaporator 36, the refrigerant of the high temperature stage refrigeration cycle circuit is gradually reduced, and the refrigeration is poor. The refrigerant is prevented from reversely flowing and accumulating in the second evaporator 36 by the check valve 39 to cause a poor cooling. The check valve 39 can solve the problem of refrigerant aggregation caused by low temperature without controlling the operation of the program regulating valve body, and has simple structure and strong operability.

The high temperature stage condensing unit 32 may include a condenser and a dew condensation preventing pipe. The low temperature stage refrigeration cycle circuit 40 further includes a low temperature stage condensing device 45 and a low temperature stage throttling device 43. The inlet of the high-temperature stage condensing device 32 is communicated with the outlet of the high-temperature stage compressor 31, the outlet of the evaporation part 37 is communicated with the inlet of the first evaporator 35, and the outlet of the first evaporator 35 is communicated with the inlet of the high-temperature stage compressor 31. An outlet of the low-temperature stage compressor 41 is communicated with an inlet of a low-temperature stage condensing device 45, an outlet of the low-temperature stage condensing device 45 is communicated with an inlet of a condensing part 42, an outlet of the condensing part 42 is communicated with a low-temperature stage throttling device 43, an outlet of the low-temperature stage throttling device 43 is communicated with an inlet of a third evaporator 44, and an outlet of the third evaporator 44 is communicated with an inlet of the low-temperature stage compressor 41.

In some alternative embodiments, the condensing portion 42 and the evaporating portion 37 may form a condensing evaporator. The condensing evaporator can be a double-pipe heat exchanger, the double-pipe heat exchanger is a concentric sleeve formed by mutually sleeving and connecting two standard pipes with different sizes, the channel outside is called a shell pass, and the channel inside is called a pipe pass. The two different media can flow in the shell side and the tube side in the opposite directions (or in the same direction) to achieve the effect of heat exchange. The evaporation section 37 may be a tube side and the condensation section 42 may be a shell side. In other alternative embodiments, the condensation section 42 and the evaporation section 37 can also be two copper tubes abutting each other. The two copper pipes are arranged in a mutual attaching mode. The contact part between the two copper pipes can be fixed by tin soldering to strengthen the heat transfer. The two copper pipes can be wrapped with aluminum foils. In other alternative embodiments, the condensing portion 42 and the evaporating portion 37 may share heat exchange fins. The evaporation unit 37 and the condensation unit 42 are provided in the second refrigeration chamber. Of course, the evaporation part 37 and the condensation part 42 may be provided at other positions of the refrigerator.

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 refrigerator comprises a refrigerator body, wherein a first storage chamber and a second storage chamber are formed in the refrigerator body, and the refrigerator is characterized by further comprising a high-temperature refrigeration circulation loop and a low-temperature refrigeration circulation loop;

the high-temperature refrigeration circulation loop comprises a control valve, a first evaporator, a second evaporator and an evaporation part, wherein the first evaporator is used for absorbing heat, the first evaporator is used for supplying cold to the first storage compartment, and the second evaporator is used for supplying cold to the second storage compartment;

the control valve has a first outlet and a second outlet, the inlet of the first evaporator being in communication with the first outlet; the inlet of the second evaporator is communicated with the second outlet; and is

The outlet of the second evaporator is communicated with the inlet of the first evaporator, and the inlet of the evaporation part is communicated with the outlet of the first evaporator; or the outlet of the second evaporator is communicated with the inlet of the evaporation part, and the inlet of the evaporation part is communicated with the inlet of the first evaporator;

the low-temperature-level refrigeration cycle loop comprises a condensation part and a third evaporator used for absorbing heat, the condensation part is thermally connected with the evaporation part, and the third evaporator is used for supplying cold to the second storage compartment.

2. The refrigerator according to claim 1,

the control valve has a third outlet which communicates with the inlet of the evaporation portion.

3. The refrigerator according to claim 2,

the inside third storing compartment that is formed with of box, high temperature level refrigeration cycle return circuit still includes the fourth evaporimeter, the fourth evaporimeter set up in the third export with between the evaporation department, the fourth evaporimeter is used for doing the room cooling is in the third storing compartment.

4. The refrigerator according to claim 3,

a first throttling device is arranged between the inlet of the first evaporator and the first outlet;

a second throttling device is arranged between the inlet of the second evaporator and the second outlet;

a third throttling device is arranged between the inlet of the fourth evaporator and the third outlet;

the first storage compartment and the second storage compartment are arranged in parallel along the transverse extension direction of the refrigerator, and the third storage compartment is arranged on the upper sides of the first storage compartment and the second storage compartment.

5. The refrigerator according to claim 1,

and a valve which only allows the refrigerant from the second evaporator to flow out in one direction is arranged on the outlet pipe of the second evaporator.

6. The refrigerator according to claim 1, further comprising:

and the air supply device is used for promoting airflow to flow through the second evaporator and/or the third evaporator and promoting the airflow to enter the second storage compartment.

7. The refrigerator according to claim 1,

the second evaporator comprises a first cooling evaporation pipe, the third evaporator comprises a second cooling evaporation pipe, and the first cooling evaporation pipe and the second cooling evaporation pipe penetrate through the same fin group.

8. The refrigerator according to claim 7,

the second evaporator is arranged on the upper side of the third evaporator, a first refrigerating chamber used for arranging the second evaporator and the third evaporator is further formed at the position, corresponding to the rear side of the second storage chamber, of the box body, the first refrigerating chamber is communicated with the second storage chamber through a first air supply structure, and refrigerating airflow is provided for the second storage chamber through the first air supply structure.

9. The refrigerator according to claim 8,

the first air supply structure is arranged between the first refrigerating chamber and the second storage chamber;

the air supply device is characterized in that an air inlet is formed in the rear side face of the first air supply structure, a plurality of air supply outlets are formed in the front side face of the first air supply structure, and an air supply air duct is formed in the first air supply structure.

10. The refrigerator according to claim 1,

a second refrigerating chamber used for arranging the first evaporator is formed in the position, corresponding to the rear side of the first storage compartment, of the box body, and the second refrigerating chamber is communicated with the first storage compartment through a second air supply structure so as to provide refrigerating airflow for the first storage compartment through the second air supply structure;

the evaporation part and the condensation part are arranged in the second refrigerating chamber.

Images