Refrigerator

Abstract

The present invention provides a refrigerator. The refrigerator includes a box body having a first compartment and a second compartment formed therein, a first evaporator disposed around the first compartment and configured to supply cooling to the first compartment, a second evaporator disposed around the second compartment and configured to supply cooling to the second compartment, a defrosting device disposed at the second evaporator and configured to heat and defrost the second evaporator, and a cold conduction structure disposed between the first evaporator and the second compartment. When the second evaporator is in a defrosting state, the cold conduction structure is configured to transfer a part of the cold quantity generated by the first evaporator to the second compartment. With such an arrangement, the temperature fluctuation of the storage compartments of the refrigerator can be reduced.

Description

Technical Field

[0001] The present invention relates to a refrigerator, and more particularly to a refrigerator for storing articles. Background Art

[0002] As the main carrier for storing household food, the refrigerator is a necessary equipment to ensure the nutritional health of food. In order to achieve the refrigeration and freshness preservation effect of the refrigerator, a refrigeration system needs to be provided inside the refrigerator. Generally, an evaporator is provided in the refrigeration system, and the temperature of the storage compartment is reduced through the heat absorption function of the evaporator. However, since the temperature of the evaporator surface is much lower than the ambient temperature of the evaporator, water vapor in the air will condense on the evaporator surface. Over time, a thick frost layer will form on the evaporator surface. If not removed in time, it will greatly affect the heat exchange effect of the evaporator.

[0003] In order to remove the frost layer on the evaporator surface, the prior art generally sets a heating device at the bottom of the evaporator to defrost the evaporator regularly by heating the heating device. However, this design has the following defects: since the evaporator cannot refrigerate during the defrosting process, the heat generated by the heating device may also flow into the storage compartment, which will cause the temperature of the storage compartment to rise, resulting in excessive temperature fluctuations in the storage compartment and affecting the storage effect of the storage compartment. Summary of the Invention

[0004] The purpose of the present invention is to provide a refrigerator that can reduce the temperature fluctuation of the storage compartment.

[0005] To achieve the purpose of the above invention, the present invention provides a refrigerator, including a box body, a first compartment and a second compartment are formed inside the box body, and the refrigerator further includes

[0006] A first evaporator, arranged around the first compartment and used for supplying cold to the first compartment;

[0007] A second evaporator, arranged around the second compartment and used for supplying cold to the second compartment;

[0008] A defrosting device, arranged at the second evaporator and used for heating and defrosting the second evaporator;

[0009] A cold conduction structure, arranged between the first evaporator and the second compartment, when the second evaporator is in a defrosting state, the cold conduction structure is used for transferring part of the cold quantity generated by the first evaporator to the second compartment.

[0010] As a further improvement of the present invention, the cold conduction structure includes a cold conduction air duct arranged between the first evaporator and the second compartment and a cold conduction fan arranged in the cold conduction air duct.

[0011] As a further improvement of the present invention, the refrigeration temperature of the second compartment is lower than that of the first compartment.

[0012] As a further improvement of the present invention, the refrigerator further includes a compressor, a condenser connected to the compressor, a first capillary tube disposed between the condenser and the first evaporator, and a second capillary tube disposed between the condenser and the second evaporator. When the second evaporator is in a defrost state, the first evaporator is in communication with the second capillary tube.

[0013] As a further improvement of the present invention, a first valve is provided at one end of the condenser away from the compressor. The first capillary tube and the second capillary tube are simultaneously connected to the first valve, and the first valve is used to control the communication state between the first capillary tube and the second capillary tube and the condenser.

[0014] As a further improvement of the present invention, a second valve is provided at one end of the second capillary tube away from the condenser. The second valve is simultaneously connected to a first branch and a second branch. The first branch is connected to the first evaporator, and the second branch is connected to the second evaporator. The second valve is used to control the communication state between the first branch and the second branch and the second capillary tube.

[0015] As a further improvement of the present invention, a third valve is provided at one end of the first evaporator away from the condenser. The third valve is simultaneously connected to a third branch and a fourth branch. The second evaporator is disposed on the third branch, and one end of the second branch away from the second valve is connected to the third branch. The third valve is used to control the communication state between the third branch and the fourth branch and the first evaporator.

[0016] As a further improvement of the present invention, a fourth valve is provided at one end of the compressor close to the first evaporator. One ends of the third branch and the fourth branch away from the third valve are simultaneously connected to the fourth valve, and the fourth valve is used to control the communication state between the third branch and the fourth branch and the compressor.

[0017] As a further improvement of the present invention, the first valve, the second valve, the third valve, and the fourth valve are reversing valves.

[0018] As a further improvement of the present invention, the first evaporator and the second evaporator are finned evaporators.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: it can reduce the temperature fluctuation of the storage compartments of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further describes in detail the specific embodiments of the present invention with reference to the drawings, wherein:

[0021] Figure 1 is a schematic structural view of a preferred specific embodiment of the refrigerator of the present invention;

[0022] Figure 2 is a schematic structural view of another preferred specific embodiment of the refrigerator of the present invention;

[0023] Figure 3 is a schematic view of a preferred specific embodiment of the refrigeration system of the refrigerator of the present invention. Specific Embodiment

[0024] The present invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present invention, and structural, method, or functional transformations made by those of ordinary skill in the art based on these embodiments are all included within the protection scope of the present invention.

[0025] Figure 1 is a schematic structural view of a preferred specific embodiment of the refrigerator of the present invention.

[0026] As Figure 1 shown, the refrigerator includes a box body 1, a first compartment 2 and a second compartment 3 are formed inside the box body 1, and the refrigerator further includes

[0027] a first evaporator 4, which is arranged around the first compartment 2 and is used for supplying cold to the first compartment 2;

[0028] a second evaporator 5, which is arranged around the second compartment 3 and is used for supplying cold to the second compartment 3;

[0029] a defrosting device 6, which is arranged at the second evaporator 5 and is used for heating and defrosting the second evaporator 5;

[0030] a cold conduction structure 7, which is arranged between the first evaporator 4 and the second compartment 3. When the second evaporator 5 is in a defrosting state, the cold conduction structure 7 is used for transmitting part of the cold generated by the first evaporator 4 to the second compartment 3.

[0031] Both the first compartment 2 and the second compartment 3 are storage compartments. Through the cold conduction structure 7, the cold generated by the evaporator that is still operating is transported to the compartment refrigerated by the evaporator that is not operating and is in a defrosting state, so as to supplement sufficient cold to the compartment refrigerated by the evaporator that is not operating and is in a defrosting state, and prevent the temperature of the storage compartment from fluctuating too much due to reasons such as the defrosting time of the evaporator being too long, the heat generated by the defrosting device 6 for heating the evaporator flowing into the compartment, and the cold loss of the storage compartment being too fast due to the relatively high environmental temperature of the storage compartment, resulting in poor storage effect in the storage compartment.

[0032] Meanwhile, by setting up the cold conduction structure 7, the cold generated by the evaporator still in operation is conveyed to the storage compartment refrigerated by the evaporator that is not in operation and is in the defrosting state. The structure is simple, does not occupy too much space in the refrigerator, and does not require major modifications to the original structure of the refrigerator. It has good effects, low cost and is easy to implement.

[0033] In summary, adopting this structural design can effectively supplement cold to the storage compartment, reduce the temperature fluctuation in the storage compartment, improve the storage and freshness preservation effect of the storage compartment. At the same time, the structure is simple, the modification to the original structure of the refrigerator is small, it does not occupy storage space, the cost is relatively low and it is easy to implement.

[0034] Preferably, the cold conduction structure 7 includes a cold conduction air duct 71 arranged between the first evaporator 4 and the second compartment 3 and a cold conduction fan 72 arranged in the cold conduction air duct 71.

[0035] The cold conduction air duct 71 is connected between the evaporator and the storage compartment, and can guide the cold generated by the evaporator into the storage compartment. Due to its own structural characteristics, the cold conduction fan 72 can accelerate the flow of cold, greatly improving the cold transfer efficiency from the evaporator to the storage compartment.

[0036] Adopting this structural design can effectively supplement cold to the storage compartment, reduce the temperature fluctuation in the storage compartment, improve the storage and freshness preservation effect of the storage compartment. At the same time, the structure is simple, the modification to the original structure of the refrigerator is small, it does not occupy storage space, the cost is relatively low and it is easy to implement.

[0037] As Figure 1 shown, a heat preservation layer 8 capable of reducing the cold loss of the storage compartment is arranged around the storage compartment. The heat preservation layer 8 can be formed by foaming a foaming material. The cold conduction air duct 71 can be arranged in the heat preservation layer 8 on the back of the refrigerator and passes through the heat preservation layer 8 on the back of the refrigerator to communicate with the first evaporator 4 and the second compartment 3.

[0038] With such a setting, the structure is simple, the modification to the original structure of the refrigerator is small, it does not occupy storage space, the cost is relatively low and it is easy to implement. And it is arranged in the back heat preservation layer 8 of the refrigerator, which can realize the interconnection of multiple storage compartments and multiple evaporators, and has low requirements for the relative positions of the storage compartment and the evaporator.

[0039] Figure 2 It is a schematic structural diagram of another preferred specific embodiment of the refrigerator of the present invention.

[0040] As Figure 2 shown, the first compartment 2 and the second compartment 3 are arranged adjacent to each other, and the cold conduction air duct 71 can be arranged in the foaming layer between the first compartment 2 and the second compartment 3.

[0041] With such a setting, the cold air duct 71 is small in size, simple, compact in structure, makes small changes to the original structure of the refrigerator, does not occupy storage space, has a low cost, and is easy to implement.

[0042] Of course, the cold conduction structure 7 can also adopt other design schemes, as long as it can achieve guiding and transmitting the cold quantity of the evaporator to the corresponding storage compartment.

[0043] The cold conduction structure 7 can be one or more. The cold conduction structure 7 can be to guide the cold quantity of the first evaporator 4 to the second compartment 3, or to guide the cold quantity of the second evaporator 5 to the first compartment 2, or it can be to achieve guiding the cold quantity of the first evaporator 4 to the first compartment 2 while also being able to guide the cold quantity of the second evaporator 5 to the first compartment 2.

[0044] The refrigerator is not limited to two storage compartments either, and can also be a refrigerator with more than two compartments.

[0045] Preferably, the refrigeration temperature of the second compartment 3 is lower than that of the first compartment 2.

[0046] The first compartment 2 can be a refrigerating compartment, and the second compartment 3 can be a freezing compartment. In actual use, the storage temperature of the refrigerating compartment is not much different from the ambient temperature, and the degree of frosting of the evaporator supplying cold to the refrigerating compartment is also relatively low. Therefore, during the defrosting period of the evaporator in the refrigerating compartment, the loss of cold quantity in the refrigerating compartment is less, and the heat inflow brought by the defrosting device 6 of this evaporator is also less, and the defrosting time required for this evaporator is also relatively short. So generally, the temperature fluctuation in the refrigerating compartment is not too large. On the contrary, due to the above factors, the temperature in the freezing compartment may fluctuate too much. Therefore, the cold conduction structure 7 is preferably arranged between the refrigerating evaporator and the freezing compartment to reduce the temperature fluctuation in the freezing compartment.

[0047] With such a setting, it can effectively supplement cold quantity to the storage compartment that may have a large temperature fluctuation in a timely manner, reduce the temperature fluctuation of this storage compartment, improve the storage and freshness preservation effect of this storage compartment, and at the same time, it has a simple structure, makes small changes to the original structure of the refrigerator, does not occupy storage space, has a low cost, and is easy to implement.

[0048] Figure 3 It is a schematic diagram of a preferred specific embodiment of the refrigeration system of the refrigerator of the present invention.

[0049] Such as Figure 3As shown, the refrigerator further includes a compressor 11, a condenser 12 connected to the compressor 11, a first capillary tube 13 disposed between the condenser 12 and the first evaporator 4, and a second capillary tube 14 disposed between the condenser 12 and the second evaporator 5. When the second evaporator 5 is in the defrosting state, the first evaporator 4 is in communication with the second capillary tube 14.

[0050] The throttling effect of the second capillary tube 14 is stronger than that of the first capillary tube 13. The first evaporator 4 and the second evaporator 5 share a refrigeration system.

[0051] When only the temperature in the second compartment 3 is lower than the set temperature, the compressor 11 is in the working state, and the refrigerant flows through the condenser 12, the second capillary tube 14, and the second evaporator 5, and the second evaporator 5 cools the second compartment 3.

[0052] When only the temperature in the first compartment 2 is lower than the set temperature, the compressor 11 is in the working state, and the refrigerant flows through the condenser 12, the first capillary tube 13, and the first evaporator 4, and the first evaporator 4 cools the first compartment 2.

[0053] When the temperatures in both the first compartment 2 and the second compartment 3 are lower than the set temperature, the compressor 11 is in the working state, and the refrigerant flows through the condenser 12, the second capillary tube 14, the first evaporator 4, and the second evaporator 5. The first evaporator 4 and the second evaporator 5 simultaneously cool the first compartment 2 and the second compartment 3 respectively.

[0054] Since the throttling effect of the first capillary tube 13 is lower than that of the second capillary tube 14, in order to ensure that the first evaporator 4 has sufficient cooling capacity to supply both the first compartment 2 and the second compartment 3, it is necessary to improve the refrigeration effect of the first evaporator 4. When the second evaporator 5 is defrosting, the first evaporator 4 is connected to the second capillary tube 14, and the stronger throttling effect of the second capillary tube 14 is used to improve the refrigeration effect of the first evaporator 4.

[0055] The first compartment 2 can be a refrigerating compartment, and the second compartment 3 can be a freezing compartment. The first evaporator 4 can be a refrigerating evaporator, and the second evaporator 5 can be a freezing evaporator. The first capillary tube 13 can be a refrigerating capillary tube, and the second capillary tube 14 can be a freezing capillary tube.

[0056] With such a setting, it is possible to effectively supplement cold energy to the storage compartment that may generate large temperature fluctuations in a timely manner, reduce the temperature fluctuations in the storage compartment, improve the storage and freshness preservation effect of the storage compartment. At the same time, the structure of the refrigeration system is simple, the utilization rate of components in the refrigeration system is high, the structural modification of the original refrigeration system of the refrigerator is small, the occupied space is small, the structure is compact, the cost is low and it is easy to implement.

[0057] Preferably, a first valve 21 is provided at one end of the condenser 12 away from the compressor 11. The first capillary tube 13 and the second capillary tube 14 are simultaneously connected to the first valve 21. The first valve 21 is used to control the communication state between the first capillary tube 13 and the second capillary tube 14 and the condenser 12.

[0058] With this structural setting, the communication mode between the evaporator and different capillary tubes can be switched only by controlling the first valve 21, which can make the structure of the refrigeration system simpler, improve the utilization rate of components in the refrigeration system, make small structural modifications to the original refrigeration system of the refrigerator, occupy less space, have a compact structure, low cost and be easy to implement.

[0059] Preferably, a second valve 22 is provided at one end of the second capillary tube 14 away from the condenser 12. The second valve 22 is simultaneously connected to a first branch 31 and a second branch 32. The first branch 31 is connected to the first evaporator 4, and the second branch 32 is connected to the second evaporator 5. The second valve 22 is used to control the communication state between the first branch 31 and the second branch 32 and the second capillary tube 14.

[0060] With this structural setting, the communication mode between the capillary tube and different evaporators can be switched only by controlling the second valve 22, which can make the structure of the refrigeration system simpler, improve the utilization rate of components in the refrigeration system, make small structural modifications to the original refrigeration system of the refrigerator, occupy less space, have a compact structure, low cost and be easy to implement.

[0061] A third valve 23 is provided at one end of the first evaporator 4 away from the condenser 12. The third valve 23 is simultaneously connected to a third branch 33 and a fourth branch 34. The second evaporator 5 is arranged on the third branch 33. One end of the second branch 32 away from the second valve 22 is connected to the third branch 33. The third valve 23 is used to control the communication state between the third branch 33 and the fourth branch 34 and the first evaporator 4.

[0062] With this structural setting, the communication between different branches and the evaporator can be controlled only by controlling the third valve 23, which can make the structure of the refrigeration system simpler, improve the utilization rate of components in the refrigeration system, make small structural modifications to the original refrigeration system of the refrigerator, occupy less space, have a compact structure, low cost and be easy to implement.

[0063] A fourth valve 24 is provided at one end of the compressor 11 close to the first evaporator 4. One ends of the third branch 33 and the fourth branch 34 remote from the third valve 23 are simultaneously connected to the fourth valve 24. The fourth valve 24 is configured to control the communication state between the third branch 33 and the fourth branch 34 and the compressor 11.

[0064] With this structural arrangement, the communication mode between the compressor 11 and different evaporators can be switched only by controlling the fourth valve 24, which can make the structure of the refrigeration system simpler, improve the utilization rate of the components of the refrigeration system, result in small structural modifications to the original refrigeration system of the refrigerator, occupy a small space, have a compact structure, low cost and be easy to implement.

[0065] Furthermore, in order to better control the flow direction of the refrigerant in the refrigeration system, a fifth valve 25 can also be provided at the intersection of the branch where the first evaporator 4 is connected to the first capillary tube 13 and the branch where the first evaporator 4 is connected to the second capillary tube 14, which is beneficial to the switching of the refrigerant flow direction.

[0066] Furthermore, in order to better control the flow direction of the refrigerant in the refrigeration system, a sixth valve 26 can also be provided at the intersection of the branch where the second capillary tube 14 is connected to the second evaporator 5 and the branch where the second evaporator 5 is connected to the third valve 23, which is beneficial to the switching of the refrigerant flow direction.

[0067] In actual operation, when only the temperature in the second compartment 3 is lower than the set temperature, the compressor 11 is in a working state, and the refrigerant flows from the compressor 11 to the condenser 12, the first valve 21 in sequence, flows to the second capillary tube 14 under the control of the first valve 21, the second valve 22, the sixth valve 26, the second evaporator 5, the fourth valve 24, and then flows back to the compressor 11, and the second evaporator 5 cools the second compartment 3.

[0068] When only the temperature in the first compartment 2 is lower than the set temperature, the compressor 11 is in a working state, and the refrigerant flows from the compressor 11 through the condenser 12, the first valve 21, the first capillary tube 13, the fifth valve 25, the first evaporator 4, the third valve 23, the fourth valve 24, and then flows back to the compressor 11, and the first evaporator 4 cools the first compartment 2.

[0069] When the temperatures of the first chamber 2 and the second chamber 3 are both lower than the set temperature, the compressor 11 is in a working state, and the refrigerant flows through the condenser 12, the second capillary tube 14, the second valve 22, the fifth valve 25, the first evaporator 4, the third valve 23, the sixth valve 26, the second evaporator 5, the fourth valve 24, and then flows back to the compressor 11. The first evaporator 4 and the second evaporator 5 supply cold to the first chamber 2 and the second chamber 3 simultaneously.

[0070] When the second evaporator 5 is defrosting, the compressor 11 is in a working state, and the refrigerant flows through the condenser 12, the first valve 21, the second capillary tube 14, the second valve 22, the fifth valve 25, the first evaporator 4, the third valve 23, the fourth valve 24, and then flows back to the compressor 11. The first evaporator 4 supplies cold to the first chamber 2 and the second chamber 3 simultaneously.

[0071] Preferably, the first valve 21, the second valve 22, the third valve 23, the fourth valve 24, and the sixth valve 26 are reversing valves. With such a setting, the structure is simple, the cost is relatively low, and it is easy to control.

[0072] The first evaporator 4 and the second evaporator 5 are finned evaporators. With such a setting, the refrigeration effect is better.

[0073] In summary, the refrigerator in the present invention can solve the problem of excessive temperature fluctuations in the storage compartment. By adopting the technical solution in this application document, it can effectively supplement cold to the storage compartment, reduce the temperature fluctuations in the storage compartment, improve the storage and freshness preservation effect of the storage compartment. At the same time, the structure is simple, the modification to the original structure of the refrigerator is small, it does not occupy storage space, the structure is compact, it is easy to control, the cost is relatively low, and it is easy to implement.

[0074] It should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0075] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigerator, comprising a box body, wherein a first compartment and a second compartment are formed inside the box body, and is characterized in that, The refrigerator further comprises a first evaporator, which is arranged around the first compartment and used for cooling the first compartment; a second evaporator, which is arranged around the second compartment and used for cooling the second compartment; a defrosting device, which is arranged at the second evaporator and used for heating and defrosting the second evaporator; a cold conduction structure, which is arranged between the first evaporator and the second compartment. When the second evaporator is in a defrosting state, the cold conduction structure is used for transferring part of the cold quantity generated by the first evaporator to the second compartment. The refrigerator further comprises a compressor, a condenser connected to the compressor, a first capillary tube arranged between the condenser and the first evaporator, and a second capillary tube arranged between the condenser and the second evaporator. When the second evaporator is in a defrosting state, the first evaporator is communicated with the second capillary tube, and the throttling effect of the second capillary tube is stronger than that of the first capillary tube.

2. The refrigerator according to claim 1, characterized in that, The cold conduction structure comprises a cold conduction air duct arranged between the first evaporator and the second compartment and a cold conduction fan arranged in the cold conduction air duct.

3. The refrigerator according to claim 1, characterized in that, The refrigeration temperature of the second compartment is lower than that of the first compartment.

4. The refrigerator according to claim 3, characterized in that, A first valve is arranged at one end of the condenser far from the compressor. The first capillary tube and the second capillary tube are simultaneously connected to the first valve. The first valve is used for controlling the communication state between the first capillary tube and the second capillary tube and the condenser.

5. The refrigerator according to claim 4, wherein, A second valve is arranged at one end of the second capillary tube far from the condenser. The second valve is simultaneously connected with a first branch and a second branch. The first branch is connected to the first evaporator, and the second branch is connected to the second evaporator. The second valve is used for controlling the communication state between the first branch and the second branch and the second capillary tube.

6. The refrigerator according to claim 5, wherein, A third valve is arranged at one end of the first evaporator far from the condenser. The third valve is simultaneously connected with a third branch and a fourth branch. The second evaporator is arranged on the third branch. One end of the second branch far from the second valve is connected to the third branch. The third valve is used for controlling the communication state between the third branch and the fourth branch and the first evaporator.

7. The refrigerator according to claim 6, characterized in that, A fourth valve is arranged at one end of the compressor close to the first evaporator. One ends of the third branch and the fourth branch far from the third valve are simultaneously connected to the fourth valve. The fourth valve is used for controlling the communication state between the third branch and the fourth branch and the compressor.

8. The refrigerator according to claim 7, characterized in that, The first valve, the second valve, the third valve and the fourth valve are reversing valves.

9. The refrigerator according to claim 1, wherein, The first evaporator and the second evaporator are finned evaporators.

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