Return air dehumidification system and refrigerator

Abstract

The invention provides a return air dehumidification system and a refrigerator, the return air dehumidification system comprises an evaporator, a compressor, a condenser and a capillary tube which are connected in sequence, the capillary tube is connected to the evaporator to form a closed loop, the return air dehumidification system further comprises a condensation pipe and a heating pipe, the condensation pipe and the evaporator are arranged in parallel, and the condensation pipe is arranged at the front end of the evaporator; the heating pipe and the condenser are arranged in parallel, and the heating pipe and the condensing pipe are arranged in parallel. By arranging the condensation pipe, water vapor in air is condensed on the frosting device in front of the evaporator, and the frosting amount on the evaporator is reduced, so that attenuation of the heat exchange efficiency of the evaporator is slowed down, the defrosting period of the evaporator is prolonged, the heat exchange effect of the refrigerator is improved, and the overall power consumption of the refrigerator is reduced. By arranging the heating pipe, heat of exhaust of the compressor is used for removing frost on the condensation pipe, a defrosting heat source is not newly added, and the cost of energy consumption is saved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and particularly to a return air dehumidification system and a refrigerator. Background Art

[0002] With the development of the times, the functions of refrigerators have been gradually improved. The emergence of air-cooled refrigerators has solved the disadvantage of non-automatic defrosting of direct-cooled refrigerators. However, the frosting and defrosting problems of the evaporator of air-cooled refrigerators have also followed, attracting wide attention from refrigerator manufacturers and scholars.

[0003] The high-humidity air in the cold storage compartment of the air-cooled refrigerator will return to the surface of the evaporator through the return air duct. The moisture in the air will condense on the surface of the evaporator. Since the temperature of the evaporator is too low, it will condense into frost, resulting in a reduction in the heat transfer efficiency of the evaporator. The higher the return air humidity, the greater the amount of condensed frost. If continuous frosting is to be prevented, an additional heating device is required for defrosting at regular intervals. However, a large amount of frost requires an extended defrosting time or a high-power heating device, which will cause a large temperature drift during the defrosting process and is not conducive to the heat preservation of the refrigerator.

[0004] Most of the humid air in the refrigerator enters from the outside when the user opens the refrigerator door, or is brought in by fruits and vegetables placed in the refrigerator. The most important is the humid air that enters from the outside when the user opens the refrigerator door. When this part of the humid air encounters the evaporator with a low temperature, it will adhere to the surface of the evaporator in the form of frost, deteriorating the heat exchange effect of the evaporator. Summary of the Invention

[0005] The present application provides a return air dehumidification system and a refrigerator, which can reduce the amount of frost on the evaporator and improve the heat exchange effect of the refrigerator.

[0006] Specifically, the present invention is realized through the following technical solutions:

[0007] A return air dehumidification system includes an evaporator, a compressor, a condenser, and a capillary tube connected in sequence. The capillary tube is connected to the evaporator to form a closed loop. The return air dehumidification system further includes: a condensation tube and a heating tube. Among them, the condensation tube is arranged in parallel with the evaporator, and the condensation tube is arranged at the front end of the evaporator; the heating tube is arranged in parallel with the condenser, and the heating tube and the condensation tube are arranged in parallel.

[0008] Further, the condensation tube and the heating tube are arranged in parallel and have a first distance.

[0009] Further, a blower is arranged on one side of the evaporator. The blower and the evaporator form a blowing module to blow air to the outside. The condensation tube and the heating tube form a return air module. The outside air first passes through the return air module and then reaches the blowing module.

[0010] Further, the return air module has a return air flow channel, the condensation pipe is arranged in the return air flow channel, an electric air damper is arranged at one end of the return air flow channel, and the electric air damper controls whether the air flow in the return air flow channel directly passes through the condensation pipe.

[0011] Further, a first return air inlet and a second return air inlet are formed at the air inlet end of the return air flow channel, a return air outlet is formed at the air outlet end of the return air flow channel, the flow channel formed between the first return air inlet and the return air outlet directly passes through the condensation pipe, the flow channel formed between the second return air inlet and the return air outlet does not directly pass through the condensation pipe, and the electric air damper blocks one of the first return air inlet and the second return air inlet.

[0012] Further, the condensation pipe is bent upward to form a first convex portion and a second convex portion, the second convex portion is higher than the first convex portion, the first convex portion is directly opposite to the first return air inlet, and the second convex portion is located below the return air outlet.

[0013] Further, the second return air inlet is arranged above the first return air inlet, the heating pipe is arranged below the condensation pipe, and a drain port is opened below the heating pipe.

[0014] Further, the outlet end of the compressor is connected to the inlet end of a one-inlet two-outlet valve, and the two outlet ends of the one-inlet two-outlet valve are respectively connected to the heating pipe and the condenser.

[0015] Further, a freezing defrosting pipe and a drying filter are further included, and the freezing defrosting pipe and the drying filter are sequentially connected between the condenser and the capillary tube.

[0016] A refrigerator includes the above-mentioned return air dehumidification system.

[0017] In the present invention, by arranging the condensation pipe, the water vapor in the air is condensed on the frosting device in front of the evaporator, reducing the frosting amount on the evaporator, thereby slowing down the attenuation of the heat exchange efficiency of the evaporator, prolonging the defrosting cycle of the evaporator, improving the heat exchange effect of the refrigerator, and reducing the overall power consumption of the refrigerator.

[0018] In the present invention, by arranging the heating pipe, the heat of the compressor exhaust is used to remove the frost on the condensation pipe, without adding a new defrosting heat source and saving the cost of energy consumption. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the return air dehumidification system of the present invention.

[0020] Figure 2 is a schematic diagram of the first state of the return air flow channel of the present invention.

[0021] Figure 3 It is a schematic diagram of the second state of the return air flow path of the present invention.

[0022] Explanation of the reference numerals in the attached drawings: 1. Evaporator; 2. Compressor; 3. Condenser; 4. Capillary tube; 5. Condensation tube; 6. Heating tube; 7. Fan; 8. Air supply module; 9. Return air module; 10. One-in-two-out valve; 11. Refrigeration defrosting tube; 12. Drier filter; 901. First return air inlet; 902. Second return air inlet; 903. Return air outlet; 904. Drain outlet. Specific embodiments

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0024] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meaning understood by those of ordinary skill in the field to which the present application belongs. The terms "first", "second" and similar words used in the specification and claims of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not indicate a quantity limitation, but mean that there is at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, words such as "front part", "rear part", "lower part" and / or "upper part" are only for convenience of description and are not limited to one position or a spatial orientation. The words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "the" and "said" used in the specification and appended claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term " / and" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0025] As Figure 1As shown in the figure, a return air dehumidification system includes an evaporator 1, a compressor 2, a condenser 3, and a capillary tube 4 connected in sequence. The capillary tube 4 is connected to the evaporator 1 to form a closed loop. The system also includes a condensation tube 5 and a heating tube 6. The condensation tube 5 is arranged in parallel with the evaporator 1, so that the condensation tube 5 can still work independently while the evaporator 1 is refrigerating. The heating tube 6 is arranged in parallel with the condenser 3, and the heating tube 6 and the condensation tube 5 are arranged in parallel.

[0026] The evaporator 1, the compressor 2, the condenser 3, and the capillary tube 4 are connected in sequence. The capillary tube 4 is connected to the evaporator 1 to form a closed loop. The condensation tube 5 is arranged in parallel with the evaporator 1, and the heating tube 6 is arranged in parallel with the condenser 3. This is a refrigeration system. A refrigerant circulates in the formed loop to achieve the refrigeration process.

[0027] The condensation tube 5 is arranged at the front end of the evaporator 1. Here, the front end refers to a more forward position in the return air path. Specifically, the compressor 2 cools the air and discharges it to the external space. The air in the external space first passes through the condensation tube 5 and then reaches the evaporator 1. The process of discharging the external air from the compressor 2 to the external space is the air supply process. The process of the external air returning from the external space through the condensation tube 5 to the compressor 2 is the return air process. During the return air process, the path through which the air in the external space flows is the return air path, and the condensation tube 5 is more forward than the compressor 2 in the return air path.

[0028] Specifically, the condensation tube 5 can be a fin-tube heat exchanger, a parallel flow heat exchanger, or other types of heat exchangers. Its characteristic is that it is easy to frost. The function of the condensation tube 5 is to be arranged at the front end of the evaporator 1 to replace the evaporator 1 in frosting, so that the moisture in the air after passing through the condensation tube 5 is reduced, thereby reducing the frosting amount on the evaporator 1. The frost amount on the surface of the evaporator 1 is reduced. From a design perspective, a defrosting heating component with a lower power can be replaced or the defrosting time can be reduced, which is beneficial to eliminating the temperature drift after defrosting, reducing the temperature fluctuation in the freezing compartment, reducing the repeated freezing of food, and improving the user experience.

[0029] Furthermore, the heating tube 6 is arranged outside the condensation tube 5. The condensation tube 5 and the heating tube 6 are arranged in parallel and have a first distance. The heating tube 6 radiates heat to the condensation tube from the outside to achieve defrosting, so that the refrigerator will not melt from the inside out and cause ice to fall, resulting in ice blockage. And the heat of the exhaust gas of the compressor 2 is used to remove the frost on the condensation tube 5, without adding a new defrosting heat source, saving the cost of energy consumption, and achieving the effect of reducing the power consumption of the whole machine.

[0030] On one side of the evaporator 1, there is a blower 7. The blower 7 and the evaporator 1 form a air supply module 8 to supply air to the outside. The condensation pipe 5 and the heating pipe 6 form a return air module 9. The outside air first passes through the return air module 9 and then reaches the air supply module 8. The outlet end of the compressor 2 is connected to the inlet end of a one-inlet-two-outlet valve 10. The two outlet ends of the one-inlet-two-outlet valve 10 are respectively connected to the heating pipe 6 and the condenser 3. The one-inlet-two-outlet valve 10 controls the refrigerant flow direction.

[0031] Further, the return air dehumidification system further includes: a freezing defrosting pipe 11 and a drying filter 12. The freezing defrosting pipe 11 and the drying filter 12 are sequentially connected between the condenser 3 and the capillary tube 4. One end of the heating pipe 6 is connected to one outlet end of the one-inlet-two-outlet valve 10, and the other end of the heating pipe 6 is connected between the condenser 3 and the freezing defrosting pipe 11.

[0032] As Figures 2-3 shown, there is a return air flow channel in the return air module 9. The condensation pipe 5 is arranged in the return air flow channel. An electric air damper is arranged at one end of the return air flow channel. The electric air damper controls whether the air flow in the return air flow channel directly passes through the condensation pipe 5.

[0033] A first return air inlet 901 and a second return air inlet 902 are formed at the air inlet end of the return air flow channel. A return air outlet 903 is formed at the air outlet end of the return air flow channel. The flow channel formed between the first return air inlet 901 and the return air outlet 903 directly passes through the condensation pipe. When the first return air inlet 901 is opened and the second return air inlet 902 is closed, it is in the dehumidification state. The return air bypasses the condensation pipe and water vapor condenses on the condensation pipe. In this state, the one-inlet-two-outlet valve 10 controls the heating pipe 6 not to work, that is, disconnects the heating pipe 6 and the compressor 2.

[0034] The flow channel formed between the second return air inlet 902 and the return air outlet 903 does not directly pass through the condensation pipe. When the second return air inlet 902 is opened and the first return air inlet 901 is closed, it is in the drainage state. The return air does not bypass the condensation pipe. In this state, the one-inlet-two-outlet valve 10 controls the heating pipe 6 to work, that is, connects the heating pipe 6 and the compressor 2. The heating pipe 6 heats the condensation pipe for defrosting; at the same time, the return air also bypasses from the upper part of the heating pipe 6 and the condensation pipe to avoid hot air entering the freezing space.

[0035] The dehumidification state and the drainage state operate alternately and cannot appear simultaneously. Therefore, an electric air damper is set to block one of the first return air inlet 901 and the second return air inlet 902, thus achieving the effect of the electric air damper controlling whether the air flow in the return air flow channel directly passes through the condensation pipe 5; it should be noted that the so-called "directly" mentioned above is due to the instability of the wind, which may refract or reflect or contact the condensation pipe in other ways, but this will not affect the operation of the system.

[0036] The condensate pipe bends upward to form a first convex portion and a second convex portion. The second convex portion is higher than the first convex portion. The first convex portion faces the first return air inlet 901 directly, and the second convex portion is located below the return air outlet 903. Preferably, the condensate pipe can be arbitrarily coiled in the return air flow path, and it is only necessary that the return air passes through the condensate pipe in the dehumidification state. In the dehumidification return air duct, the cold and hot pipes are bent and coiled, with a large heat exchange area, and the defrost effectiveness of the condensate pipe is stronger. The electric air damper switches according to different working conditions to achieve the largest condensation surface during defrosting and the least heat entering the freezing space during defrost drainage.

[0037] The second return air inlet 902 is arranged above the first return air inlet 901. The heating pipe 6 is arranged below the condensate pipe, and the condensate pipe blocks in front of the heating pipe 6 to isolate a large amount of return air from contacting the heating pipe 6. A drain pan is provided below the heating pipe 6, and a drain port 904 is provided on the drain pan to drain to the outside.

[0038] Correspondingly, an embodiment of the present application further provides a refrigerator, and the refrigerator includes the above-mentioned return air dehumidification system.

[0039] After considering the specification and practicing the invention described herein, those skilled in the art will readily conceive of other embodiments of the specification. The specification is intended to cover any variations, uses, or adaptations of the specification, which follow the general principles of the specification and include the common general knowledge or conventional technical means in the technical field not claimed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the specification are pointed out by the following claims.

[0040] The above is only a preferred embodiment of the present specification and is not intended to limit the present specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present specification shall be included within the scope protected by the present specification.

Claims

1. A return air dehumidification system, comprising an evaporator, a compressor, a condenser, and a capillary tube connected in sequence, and the capillary tube is connected to the evaporator to form a closed loop. Characterized in that: It further comprises: A condensation tube, which is arranged in parallel with the evaporator and is arranged at the front end of the evaporator; A heating tube, which is arranged in parallel with the condenser, and the heating tube and the condensation tube are arranged in parallel.

2. The return air dehumidification system according to any one of claims 1, Characterized in that: The condensation tube and the heating tube are arranged in parallel and have a first distance therebetween.

3. The return air dehumidification system according to claim 1, Characterized in that: A blower is arranged on one side of the evaporator, and the blower and the evaporator form a air supply module to supply air to the outside, and the condensation tube and the heating tube form a return air module, and the outside air first passes through the return air module and then reaches the air supply module.

4. The return air dehumidification system according to claim 3, Characterized in that: The return air module has a return air flow channel, the condensation tube is arranged in the return air flow channel, and an electric air door is arranged at one end of the return air flow channel, and the electric air door controls whether the air flow in the return air flow channel directly passes through the condensation tube.

5. The return air dehumidification system according to claim 4, Characterized in that: A first return air inlet and a second return air inlet are formed at the air inlet end of the return air flow channel, a return air outlet is formed at the air outlet end of the return air flow channel, the flow channel formed between the first return air inlet and the return air outlet directly passes through the condensation tube, and the flow channel formed between the second return air inlet and the return air outlet does not directly pass through the condensation tube, and the electric air door blocks one of the first return air inlet and the second return air inlet.

6. The return air dehumidification system according to claim 5, Characterized in that: The condensation tube is bent upward to form a first convex portion and a second convex portion, the second convex portion is higher than the first convex portion, the first convex portion is opposite to the first return air inlet, and the second convex portion is located below the return air outlet.

7. The return air dehumidification system according to claim 6, Characterized in that: The second return air inlet is arranged above the first return air inlet, the heating tube is arranged below the condensation tube, and a drain port is opened below the heating tube.

8. The return air dehumidification system according to claim 1, Characterized in that: The outlet end of the compressor is connected to the inlet end of a one-in-two-out valve, and the two outlet ends of the one-in-two-out valve are respectively connected to the heating tube and the condenser.

9. The return air dehumidification system according to claim 1, Characterized in that: It further comprises a refrigeration defrosting tube and a drying filter, and the refrigeration defrosting tube and the drying filter are sequentially connected between the condenser and the capillary tube.

10. A refrigerator, Characterized in that: It comprises the return air dehumidification system according to any one of claims 1 to 9.

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