Air return system and refrigerator

Abstract

The invention belongs to the technical field of refrigerator equipment, and particularly relates to an air return system and a refrigerator. The air return system comprises a refrigeration chamber provided with a refrigeration cavity, a refrigeration air return hole is further formed in the refrigeration chamber, and the refrigeration air return hole communicates with the external space and the refrigeration cavity; the ice-making chamber is located in the refrigeration cavity, and the refrigeration air return hole is adjacent to the ice-making chamber; one end of the refrigeration air return pipe communicates with the refrigeration cavity at the refrigeration air return hole; and the negative pressure generator is located at the other end of the refrigeration air return pipe and used for generating negative pressure in the refrigeration air return pipe, so that cold energy flowing from the ice making chamber to the refrigeration cavity flows into the refrigeration air return pipe through the refrigeration air return hole. Cold can be sucked into the refrigeration air return pipe through the refrigeration air return hole, then the refrigeration air return pipe is discharged out of the refrigeration cavity, and interference of the cold in the ice making chamber on the temperature of the refrigeration chamber is reduced. Food freezing caused by too low temperature or even negative temperature of the refrigeration cavity is avoided, and the stability of the temperature in the refrigeration cavity is maintained.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigerator equipment, and particularly relates to a return air system and a refrigerator. BACKGROUND

[0002] To solve the ice taking demand at the upper part of the refrigerator, an ice making chamber is arranged at the upper left part of the refrigerating chamber, and the cold quantity of the ice making chamber is transported to the ice making chamber of the refrigerating chamber through a refrigerating chamber ice making return air pipe, so that the ice making of the ice making chamber is achieved. Since the L frame of the ice making chamber is embedded into the refrigerating chamber, and the ice making chamber completes refrigeration through the return air, due to the effect of air pressure and assembly gap, the cold air (-23 DEG C or so) of the ice making chamber can easily penetrate into the refrigerating chamber. In addition, to improve the effective volume of the product, the bubble layer thickness of the L frame of the ice making chamber is only 17 mm, the left side and the back are assembled inside the refrigerating chamber, and there is no heat preservation surface, so the overall heat preservation effect of the ice making chamber is relatively poor.

[0003] The cold quantity in the ice making chamber can be transmitted to the refrigerating chamber through the foaming layer of the L frame, so that the temperature of the refrigerating chamber is out of control. In winter or other low ambient temperature conditions, the refrigerating chamber needs less cold quantity, and under the condition that the refrigerating air door is continuously closed, the cold quantity of the ice making chamber is too much, and when the heat load of the refrigerating chamber cannot be consumed, the refrigerating negative temperature problem occurs, which causes the freezing problem of the food and water pipes in the refrigerating chamber.

[0004] The current common improvement scheme is to increase the sealing and heat preservation of the L frame, or to increase a compensation heating wire in the refrigerating chamber. The former sealing depends on the assembly level of the workshop, and it is difficult to ensure absolute air leakage, and it is also impossible to prevent the refrigeration of the ice making chamber from being delivered to the refrigerating chamber through heat transfer. The biggest problem of the latter is that a set of temperature compensation system is added, which is high in cost, and the compensation heating wire is attached to the inside of the refrigerating chamber, which can easily cause the color change of the long-term baking of the tank and even the electrical safety problem. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a return air system and a refrigerator, which aims to solve the problem of how to effectively reduce the influence of the cold quantity of the ice making chamber on the temperature of the refrigerating chamber.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0007] In a first aspect, a return air system is provided, comprising:

[0008] a refrigerating chamber having a refrigerating cavity, and a refrigerating return air hole being arranged on the refrigerating chamber and communicating an external space with the refrigerating cavity;

[0009] an ice making chamber located in the refrigerating cavity, and the refrigerating return air hole being adjacent to the ice making chamber;

[0010] a refrigerating return air pipe having one end communicating with the refrigerating cavity at the refrigerating return air hole.

[0011] A negative pressure generator is located at the other end of the refrigeration return air duct, and is used to generate negative pressure in the refrigeration return air duct, so that cold energy flowing from the ice making chamber to the refrigeration cavity flows into the refrigeration return air duct through the refrigeration return air hole.

[0012] In some embodiments, the return air system further comprises a supporting baffle located at the refrigeration cavity, which is arranged along the circumference of the ice making chamber and cooperates with the side surface of the ice making chamber to form an air cavity, cold energy of the ice making chamber flows into the air cavity, and the refrigeration return air hole communicates with the air cavity.

[0013] In some embodiments, the supporting baffle comprises a first baffle and a second baffle connected to the first baffle, the plate surface of the first baffle is parallel to a first direction, the plate surface of the second baffle is parallel to a second direction, and the first direction and the second direction are arranged staggered.

[0014] In some embodiments, a plurality of refrigeration return air holes are arranged spaced apart along the first direction, and at least one refrigeration return air hole communicates with the air cavity, and / or a plurality of refrigeration return air holes are arranged spaced apart along the second direction, and at least one refrigeration return air hole communicates with the air cavity.

[0015] In some embodiments, the refrigeration return air duct comprises a duct body and a return air box cover connected to one end of the duct body, the other end of the duct body extends to the negative pressure generator, the return air box cover is provided with a first return air groove arranged along the first direction and communicating with the duct body, and at least one refrigeration return air hole communicates with the first return air groove and the air cavity.

[0016] In some embodiments, the return air box cover is further provided with a second return air groove arranged along the second direction and communicating with the duct body, and at least one refrigeration return air hole communicates with the air cavity and the second return air groove.

[0017] In some embodiments, the refrigeration return air duct further comprises a sealing flange connected to the return air box cover and fitted to the refrigeration compartment, the sealing flange is arranged extending along the first direction and / or the second direction.

[0018] In a second aspect, a refrigerator is provided, which comprises the return air system, and further comprises a freezing compartment connected to the refrigeration compartment, the negative pressure generator is located in the freezing compartment, the freezing compartment is provided with a positioning hole, and one end of the refrigeration return air duct is inserted into the positioning hole and extends to the negative pressure generator.

[0019] In some embodiments, the refrigeration return air duct is further provided with a positioning flange, which abuts the hole edge of the positioning hole.

[0020] In some embodiments, the refrigerator further comprises an ice-making air supply pipe for delivering cold air in the freezing compartment to the ice-making compartment, and an ice-making air return pipe for returning cold energy in the ice-making compartment to the freezing compartment, the ice-making air supply pipe being communicated to the air outlet of the negative pressure generator, and the ice-making air return pipe being communicated to the air inlet of the negative pressure generator.

[0021] The application has the advantages that: by arranging the refrigeration air return hole, the refrigeration air return pipe and the negative pressure generator, the negative pressure generator generates negative pressure in the refrigeration air return pipe, so that when the cold energy in the ice-making compartment flows out and flows into the refrigeration cavity, the negative pressure acts on the cold energy, the cold energy is sucked into the refrigeration air return pipe through the refrigeration air return hole, and the refrigeration air return pipe is discharged from the refrigeration cavity, thereby reducing the interference of the cold energy in the ice-making compartment on the temperature of the refrigeration compartment. The temperature of the refrigeration cavity is prevented from being too low or even negative, the freezing of food is avoided, the stability of the temperature in the refrigeration cavity is maintained, and the structure is simple and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0023] Figure 1 is a schematic diagram of the refrigeration air return pipe of the air return system of

[0024] Figure 2 is a schematic diagram of the refrigeration air return pipe of the air return system of Figure 1

[0025] Figure 3 is a schematic diagram of the refrigeration air return pipe of the air return system of Figure 1

[0026] Figure 4 is a schematic diagram of the refrigeration air return pipe of the air return system of Figure 3

[0027] Figure 5 is a schematic diagram of the refrigeration air return pipe of the air return system of Figure 4

[0028] Figure 6 is a schematic diagram of the refrigeration air return pipe of the air return system of Figure 5

[0029] In the drawings, various reference signs represent:

[0030] ​​​​​100, return air system; 10, refrigeration compartment; 11, refrigeration cavity; 40, freezing compartment; 20, ice making compartment; 21, air cavity; 22, supporting baffle; 111, refrigeration return air hole; 30, refrigeration return air pipe; 23, ice making air supply pipe; 24, ice making return air pipe; 221, first baffle; 222, second baffle; 43, centrifugal fan; 31, return air box cover; 32, pipe body; 33, positioning flange; 34, sealing flange; 311, first return air groove; 312, second return air groove; DETAILED DESCRIPTION

[0031] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0032] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0033] In order to solve the problem in the prior art that the cold energy of the ice making compartment 20 is leaked and flows out to the refrigeration compartment 10, thereby affecting the temperature of the refrigeration compartment 10, the present application provides a return air system 100 and a refrigerator having the same.

[0034] Please refer to Figures 1 to 3 The return air system 100 comprises a refrigeration compartment 10, an ice making compartment 20, a refrigeration return air pipe 30 and a negative pressure generator.

[0035] Please refer to Figures 1 to 3 The refrigeration compartment 10 has a refrigeration cavity 11 for refrigerating food or articles, and the refrigeration compartment 10 is further provided with a refrigeration return air hole 111, which communicates the outside space with the refrigeration cavity 11, i.e. the cold air in the refrigeration cavity 11 can flow out of the refrigeration cavity 11 through the refrigeration return air hole 111.

[0036] The ice-making chamber 20 is located in the refrigeration cavity 11. It can be understood that the ice-making chamber 20 can be arranged at any position of the refrigeration cavity 11, such as the top, bottom, left side or right side of the refrigeration cavity 11. In the embodiment, the refrigeration cavity 11 is in the shape of a cuboid, the ice-making chamber 20 is located at the upper left corner of the refrigeration cavity 11, and the left side, upper side and rear surface of the ice-making chamber 20 are all connected to the inner wall of the refrigeration cavity 11, so that the outflow of cold energy in the ice-making chamber 20 is not easy to occur. The refrigeration return air hole 111 is adjacent to the ice-making chamber 20, so that the cold energy flowing out of the other surfaces of the ice-making chamber 20 can flow out of the refrigeration cavity 11 from the refrigeration return air hole 111.

[0037] Please refer to Figures 1 to 3 One end of the refrigeration return air pipe 30 communicates with the refrigeration cavity 11 at the refrigeration return air hole 111; that is, the upper end of the refrigeration return air pipe 30 is connected to the refrigeration compartment 10 at the refrigeration return air hole 111, and the lower end of the refrigeration return air pipe 30 extends downward to the negative pressure generator.

[0038] Please refer to Figures 1 to 3 The negative pressure generator is located at the other end of the refrigeration return air pipe 30, that is, the lower end of the refrigeration return air pipe 30. The negative pressure generator is used to generate negative pressure in the refrigeration return air pipe 30. It can be understood that the negative pressure generator generates negative pressure at the lower end of the refrigeration return air pipe 30, and negative pressure is also generated at the upper end of the refrigeration return air pipe 30 through the conduction of negative pressure. In this way, the cold energy flowing from the ice-making chamber 20 to the refrigeration cavity 11 is also within the range of action of the negative pressure of the refrigeration return air pipe 30, and then the cold energy flows into the refrigeration return air pipe 30 through the refrigeration return air hole 111, and flows out of the refrigeration cavity 11, so that the temperature in the refrigeration cavity 11 is not affected.

[0039] Please refer to Figures 1 to 3 The refrigeration return air system 100 provided in the embodiment of the application generates negative pressure in the refrigeration return air pipe 30 through the arrangement of the refrigeration return air hole 111, the refrigeration return air pipe 30 and the negative pressure generator. When the cold energy in the ice-making chamber 20 flows out and flows into the refrigeration cavity 11, the negative pressure acts on the cold energy, so that the cold energy is sucked into the refrigeration return air pipe 30 through the refrigeration return air hole 111, and then the refrigeration return air pipe 30 discharges the cold energy out of the refrigeration cavity 11, thereby reducing the interference of the cold energy in the ice-making chamber 20 on the temperature of the refrigeration compartment 10. The temperature of the refrigeration cavity 11 is prevented from being too low or even negative, which causes the freezing of food, the stability of the temperature in the refrigeration cavity 11 is maintained, and the structure is simple and the cost is low.

[0040] Please refer to Figures 1 to 3It can be understood that the negative pressure generator can be a centrifugal fan 43, and the lower end of the refrigeration return air pipe 30 extends to the air inlet of the centrifugal fan 43, and the air inlet of the centrifugal fan 43 is a negative pressure environment. By using the positive negative pressure of the centrifugal fan 43, the low-temperature air flowing out of the ice making chamber 20 in the refrigeration cavity 11 can be sucked to other places, such as being recycled to the freezing compartment 40, thereby avoiding air leakage and heat conduction of the ice making chamber 20, and causing the refrigeration cavity 11 to be in a negative temperature due to the transfer of cold energy from the ice making chamber 20 to the refrigeration cavity 11.

[0041] And the redundant cold energy of the outer surface of the ice making chamber 20 is transported to the freezing compartment 40, which improves the utilization rate of cold energy and prevents the refrigeration cavity 11 from being in a negative temperature due to the redundancy of cold energy in the refrigeration cavity 11, thereby preventing the risk of freezing of food and water pipes in the refrigeration chamber.

[0042] Please refer to Figures 1 to 3 It can also be understood that the refrigeration return air hole 111 is arranged close to the top of the refrigeration cavity 11, so that the hot air in the refrigeration cavity 11 will float to the top of the refrigeration cavity 11 due to its low density, and then be absorbed by the refrigeration return air pipe 30 together with the cold energy flowing out of the ice making chamber 20 and discharged from the refrigeration cavity 11, which is conducive to controlling the temperature of the refrigeration cavity 11 within a reasonable range.

[0043] Please refer to Figures 4 to 6 In some embodiments, the return air system 100 further comprises a supporting baffle 22 located in the refrigeration cavity 11, the supporting baffle 22 is arranged along the circumference of the ice making chamber 20 and cooperates with the side surface of the ice making chamber 20 to form an air cavity 21, the cold energy of the ice making chamber 20 flows into the air cavity 21, and the refrigeration return air hole 111 communicates with the air cavity 21.

[0044] Please refer to Figures 4 to 6 It can be understood that the supporting baffle 22 is at least partially located below the ice making chamber 20 and surrounds the ice making chamber 20 along the circumferential portion of the ice making chamber 20. Since the cold energy flowing out of the ice making chamber 20 has a lower temperature than the air in the refrigeration cavity 11, the cold energy flowing out of the ice making chamber 20 can be concentrated and accommodated in the air cavity 21, and then discharged from the air cavity 21 through the refrigeration return air hole 111, thereby improving the efficiency of discharging cold energy from the refrigeration cavity 11.

[0045] Please refer to Figures 4 to 6It can also be understood that the cold energy flowing out of the ice making chamber 20 can also be avoided from diffusing disorderly in the refrigeration cavity 11 and being difficult to be effectively collected by supporting the baffle 22, and the air cavity 21 can concentrate and guide the cold energy to the refrigeration return air duct 30, reducing the diffusion and residence of the cold energy in the refrigeration cavity 11. In combination with the suction effect of the negative pressure generator, the recovery efficiency of the cold energy is effectively improved, the temperature in the refrigeration compartment 10 is avoided from being too low, and the temperature control capability of the refrigerator under different ambient temperatures is enhanced.

[0046] Please refer to Figures 4 to 6 In some embodiments, the supporting baffle 22 comprises a first baffle 221 and a second baffle 222 connected to the first baffle 221, the plate surface of the first baffle 221 is parallel to the first direction, the plate surface of the second baffle 222 is parallel to the second direction, and the first direction and the second direction are arranged staggered.

[0047] Please refer to Figures 4 to 6 Optionally, in the embodiment, the first direction is along the horizontal direction, and the second direction is along the vertical direction, so that the first baffle 221 is a horizontal plate arranged along the horizontal direction, and the second baffle 222 is a vertical plate arranged along the vertical direction. The area of the first baffle 221 is significantly larger than the area of the second baffle 222, so that the cold energy can be concentrated and stored, and the cold energy is avoided from diffusing randomly. The staggered arrangement of the first baffle 221 and the second baffle 222 enables the air cavity 21 to form a more comprehensive surrounding around the ice making chamber 20, covering the cold energy leakage paths in multiple directions, ensuring that the cold energy is effectively collected to the air cavity 21 and discharged through the refrigeration return air holes 111, improving the integrity and efficiency of the cold energy recovery, and improving the precision of the temperature control in the refrigeration cavity 11.

[0048] Please refer to Figures 4 to 6 In some embodiments, a plurality of refrigeration return air holes 111 are arranged along the first direction, and at least one refrigeration return air hole 111 is in communication with the air cavity 21,

[0049] Please refer to Figures 4 to 6 Optionally, a plurality of refrigeration return air holes 111 are arranged horizontally along the first direction, and the plurality of refrigeration return air holes 111 are located on the same horizontal plane. The air cavity 21 is in communication with the refrigeration return air duct 30 through the plurality of refrigeration return air holes 111, enhancing the flexibility and efficiency of the cold energy recovery in the air cavity 21. The spaced arrangement of the plurality of refrigeration return air holes 111 expands the coverage range of the cold energy collection, so that the cold air in the air cavity 21 can quickly enter the refrigeration return air duct 30 through the plurality of refrigeration return air holes 111, avoiding the problems of cold energy residence or cold energy discharge not in time, improving the uniformity and efficiency of the cold energy recovery, and reducing the risk of negative temperature in the refrigeration cavity 11.

[0050] It can be understood that, among the refrigeration return air holes 111 arranged along the first direction, at least one refrigeration return air hole 111 directly communicates the refrigeration cavity 11 and the refrigeration return air pipe 30, so that the cold energy or hot air in the refrigeration cavity 11 directly flows into the refrigeration return air pipe 30.

[0051] Please refer to Figures 4 to 6 In some embodiments, a plurality of refrigeration return air holes 111 are arranged along the second direction at intervals, and at least one refrigeration return air hole 111 communicates the air cavity 21.

[0052] Optionally, a plurality of refrigeration return air holes 111 are vertically arranged along the second direction, and the plurality of refrigeration return air holes 111 are located in the same vertical plane. The air cavity 21 is communicated to the refrigeration return air pipe 30 through the plurality of refrigeration return air holes 111, which enhances the flexibility and efficiency of the cold energy recovery in the air cavity 21. The interval arrangement of the plurality of refrigeration return air holes 111 expands the coverage of the cold energy collection, so that the cold air in the air cavity 21 can quickly enter the refrigeration return air pipe 30 through the plurality of refrigeration return air holes 111, avoiding the problems of cold energy retention or cold energy emission not in time, improving the uniformity and efficiency of the cold energy recovery, and reducing the risk of negative temperature of the refrigeration cavity 11.

[0053] It can be understood that, among the refrigeration return air holes 111 arranged along the second direction, at least one refrigeration return air hole 111 directly communicates the refrigeration cavity 11 and the refrigeration return air pipe 30, so that the cold energy or hot air in the refrigeration cavity 11 directly flows into the refrigeration return air pipe 30.

[0054] Please refer to Figures 4 to 6 In some embodiments, the refrigeration return air pipe 30 includes a pipe body 32 and a return air box cover 31 connected to one end of the pipe body 32. The other end of the pipe body 32 extends to the negative pressure generator. The return air box cover 31 is provided with a first return air groove 311 arranged along the first direction and communicating with the pipe body 32. At least one refrigeration return air hole 111 communicates the first return air groove 311 and the air cavity 21.

[0055] Optionally, the refrigeration return air duct 30 is located at the back of the refrigeration compartment 10, the upper end of the duct body 32 extends to the ice making chamber 20, the lower end of the duct body 32 extends downward to the negative pressure generator, the return air box cover 31 is connected to the upper end of the duct body 32, and the return air box cover 31 covers at least one refrigeration return air hole 111, so that the first return air groove 311 communicates with at least one refrigeration return air hole 111, and the cold air in the air cavity 21 can be transmitted to the first return air groove 311 through the refrigeration return air hole 111, and then flows into the duct body 32 through the first return air groove 311. Of course, the first return air groove 311 can also communicate with two refrigeration return air holes 111, one of which communicates the air cavity 21 and the first return air groove 311, and the other of which communicates the refrigeration cavity 11 and the first return air groove, so that the cold air in the air cavity 21 and the hot air in the refrigeration cavity can both enter the first return air groove 311, and then flow into the duct body 32 through the first return air groove 311.

[0056] Please refer to Figures 4 to 6 In some embodiments, the return air box cover 31 is also provided with a second return air groove 312 arranged in the second direction and communicating with the duct body 32, and at least one refrigeration return air hole 111 communicates the air cavity 21 and the second return air groove 312.

[0057] Please refer to Figures 4 to 6 It can be understood that the return air box cover 31 covers at least one refrigeration return air hole 111, so that the second return air groove 312 communicates with at least one refrigeration return air hole 111, and the cold air in the air cavity 21 can be transmitted to the second return air groove 312 through the refrigeration return air hole 111, and then flows into the duct body 32 through the second return air groove 312. Of course, the second return air groove 312 can also communicate with two refrigeration return air holes 111, one of which communicates the air cavity 21 and the second return air groove 312, and the other of which communicates the refrigeration cavity 11 and the second return air groove, so that the cold air in the air cavity 21 and the hot air in the refrigeration cavity can both enter the second return air groove 312, and then flow into the duct body 32 through the second return air groove 312.

[0058] Please refer to Figures 4 to 6 Optionally, the first return air groove 311 and the second return air groove 312 are integrally arranged in an L shape, the first return air groove 311 is in a horizontal direction, the second return air groove 312 is in a vertical direction, and the first return air groove 311 communicates with the second return air groove 312, so that the cold air flowing out of the ice making chamber 20 can be fully absorbed by the refrigeration return air duct 30.

[0059] Please refer to Figures 4 to 6Optionally, the shape of the refrigeration return air holes 111 can be circular, oval or polygonal, and in the embodiment, the shape of each refrigeration return air hole 111 is rectangular, and the length of the refrigeration return air hole 111 arranged along the first direction is less than the length of the refrigeration return air hole 111 arranged along the second direction, so that the cold energy can be fully absorbed into the refrigeration return air pipe 30.

[0060] In some embodiments, the refrigeration return air pipe 30 further comprises a sealing flange 34 connected to the return air box cover 31 and fitted on the refrigeration compartment 10, and the sealing flange 34 is arranged along the first direction and / or the second direction.

[0061] Please refer to Figures 4 to 6 Optionally, the first return air groove 311 is arranged with a sealing flange 34 along the extension direction thereof, and the second return air groove 312 is also arranged with a sealing flange 34 along the extension direction thereof, and the sealing flange 34 can increase the contact area between the return air box cover 31 and the refrigeration compartment 10, and also improve the sealing of the first return air groove 311 and the second return air groove 312, so as to prevent the foaming material from entering the first return air groove 311 or the second return air groove 312 through the gap between the return air box cover 31 and the refrigeration compartment 10 in the subsequent foaming process.

[0062] Moreover, the sealing flange 34 can improve the sealing of the connection between the return air box cover 31 and the refrigeration compartment 10, so that the cold energy entering the first return air groove 311 and the second return air groove 312 is not easy to leak at the gap or external air to infiltrate, thereby improving the recycling rate of the cold energy.

[0063] The application also provides a refrigerator comprising the return air system 100, and the specific structure of the return air system 100 is referred to the above embodiments, and since the refrigerator adopts all the technical solutions of the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0064] Please refer to Figures 1 to 3 In some embodiments, the refrigerator further comprises a freezing compartment 40 connected to the refrigeration compartment 10, and the negative pressure generator is located in the freezing compartment 40, and the freezing compartment 40 is provided with a positioning hole, and one end of the refrigeration return air pipe 30 is inserted into the positioning hole and extends to the negative pressure generator.

[0065] Please refer to Figures 4 to 6Optionally, the freezing chamber 40 is located below the refrigerating chamber 10, and the negative pressure generator can be a centrifugal fan 43 connected to the freezing chamber 40, and the refrigerating return air pipe 30 extends to the air inlet of the front face of the centrifugal fan 43 through the positioning hole. When the centrifugal fan 43 is running, the front face of the centrifugal fan 43 has a negative pressure, and the centrifugal force generated by the rotation of the blades throws the air radially. The application integrates the refrigerating return air pipe 30 and the negative pressure generator by using the low-temperature environment of the freezing chamber 40 and the precise connection of the positioning hole, thereby reducing the loss in the transmission of cold energy.

[0066] Referring to Figures 4 to 6 In some embodiments, the refrigerating return air pipe 30 is further provided with a positioning flange 33 abutting the hole edge of the positioning hole.

[0067] It can be understood that the positioning flange 33 is protruded on the circumferential side of the pipe body 32, and the positioning flange 33 is annular. The positioning flange 33 can prevent the pipe body 32 from being excessively inserted into the positioning hole and seal the positioning hole after the pipe body 32 is inserted, and after the pipe body 32 is inserted in place, one end of the pipe body 32 abuts the air inlet of the negative pressure generator.

[0068] Referring to Figures 4 to 6 In some embodiments, the refrigerator further comprises an ice-making air supply pipe 23 and an ice-making return air pipe 24, the ice-making air supply pipe 23 is used to transport cold air in the freezing chamber 40 to the ice-making chamber 20, the ice-making return air pipe 24 is used to transmit cold energy in the ice-making chamber 20 back to the freezing chamber 40, the ice-making air supply pipe 23 is connected to the air outlet of the negative pressure generator, and the refrigerating return air pipe 30 is connected to the air inlet of the negative pressure generator.

[0069] Referring to Figures 4 to 6 It can be understood that, through the ice-making air supply pipe 23 and the ice-making return air pipe 24, the cold air in the freezing chamber 40 can be transported to the ice-making chamber 20 and the cold energy in the ice-making chamber 20 can be transmitted back to the freezing chamber 40, the ice-making air supply pipe 23 is connected to the air outlet of the negative pressure generator, and the refrigerating return air pipe 30 is connected to the air inlet, thereby realizing efficient recycling of cold energy and control of the temperature of the refrigerating chamber 10.

[0070] It can be understood that, through the ice-making air supply pipe 23 and the ice-making return air pipe 24, the cold energy of the freezing evaporator in the freezing chamber 40 can be transmitted to the ice-making chamber 20 through air circulation, and the power of the air circulation comes from the centrifugal fan 43.

[0071] Referring to Figures 4 to 6In the ice-making process, in order to increase the ice-making amount, the temperature of the ice-making air supply pipe 23 should be as low as possible, and the air supply speed should be as high as possible, so as to reduce the temperature in the ice-making chamber 20. However, with the increase of the air supply speed, the air pressure in the ice-making chamber 20 increases, the low-temperature air permeating into the refrigeration cavity 11 increases, and the low-temperature air permeates into the refrigeration cavity 11 along the assembly surface of the ice-making chamber 20.

[0072] Due to the negative pressure effect of the centrifugal fan 43, the pressure in the refrigeration air return pipe 30 at the top of the refrigeration compartment 10 is lower than that in the refrigeration cavity 11. The low-temperature cold energy permeating from the ice-making chamber 20 mixes with the hot air in the upper part of the refrigeration cavity 11 and flows into the refrigeration air return pipe 30 through the refrigeration air return hole 111, and then enters the ice-making air supply pipe 23 through the centrifugal fan 43, thereby completing the recycling of the redundant cold energy of the ice-making chamber 20.

[0073] That is, the cold energy permeating from the ice-making chamber 20 can also be recycled and delivered back to the ice-making chamber 20. The problem of the low-temperature air permeating from the ice-making chamber 20 sinking in the refrigeration cavity 11 and causing the temperature of the refrigeration cavity 11 to lose control and even become negative is solved, which is beneficial to maintaining the discharge of the hot air in the upper part of the refrigeration cavity 11, improving the temperature difference between the upper and lower parts of the refrigeration cavity 11, and improving the uniformity of the temperature in the refrigeration cavity 11.

[0074] The above is only an optional embodiment of the present application and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A return air system, characterized in that: include: A refrigeration compartment has a refrigeration cavity, and a refrigeration return air hole is opened on the refrigeration compartment, and the refrigeration return air hole connects the external space with the refrigeration cavity; an ice-making chamber, located in the refrigeration cavity, and the refrigeration return air hole is adjacent to the ice-making chamber; a refrigerated air return duct, one end of which is connected to the refrigerated cavity at the refrigerated air return hole; as well as A negative pressure generator is located at the other end of the refrigerated return air duct, and is used to generate negative pressure in the refrigerated return air duct so that the cold air flowing from the ice making chamber to the refrigerated cavity flows into the refrigerated return air duct through the refrigerated return air hole.

2. The return air system according to claim 1, wherein: The return air system also includes a supporting baffle located in the refrigeration cavity. The supporting baffle is arranged along the circumference of the ice-making chamber and forms an air cavity together with the side surface of the ice-making chamber. The cold air in the ice-making chamber flows into the air cavity, and the refrigeration return air hole is connected to the air cavity.

3. The return air system according to claim 2, wherein: The supporting baffle includes a first baffle and a second baffle connected to the first baffle, the plate surface of the first baffle is parallel to a first direction, the plate surface of the second baffle is parallel to a second direction, and the first direction and the second direction are arranged alternately.

4. The return air system according to claim 3, wherein: A plurality of the refrigerated return air holes are arranged at intervals along the first direction, and at least one of the refrigerated return air holes is connected to the air cavity, and / or a plurality of the refrigerated return air holes are arranged at intervals along the second direction, and at least one of the refrigerated return air holes is connected to the air cavity.

5. The return air system according to any one of claims 3-4, characterized in that: The refrigerated return air duct includes a tube body and a return air box cover connected to one end of the tube body, the other end of the tube body extends to the negative pressure generator, the return air box cover is provided with a first return air slot arranged along the first direction and connected to the tube body, and at least one refrigerated return air hole is connected to the first return air slot and the air cavity.

6. The air return system according to claim 5, wherein: The return air box cover is further provided with a second return air slot arranged along the second direction and connected to the tube body, and at least one refrigeration return air hole is connected to the air cavity and the second return air slot.

7. The air return system according to claim 5, wherein: The refrigeration return air duct further includes a sealing flange connected to the return air box cover and attached to the refrigeration compartment, and the sealing flange is extended along the first direction and / or the second direction.

8. A refrigerator, characterized in that: The refrigerator comprises the return air system according to any one of claims 1 to 7, wherein the refrigerator further comprises a freezer compartment connected to the refrigeration compartment, the negative pressure generator is located in the freezer compartment, a positioning hole is provided in the freezer compartment, and one end of the refrigeration return air duct is inserted into the positioning hole and extends to the negative pressure generator.

9. The refrigerator according to claim 8, wherein: The refrigeration return air duct is further provided with a positioning flange, and the positioning flange abuts against the edge of the positioning hole.

10. The refrigerator according to claim 8, wherein: The refrigerator further includes an ice-making air supply duct and an ice-making air return duct, wherein the ice-making air supply duct is used to transport the cold air in the freezer compartment to the ice-making compartment, and the ice-making air return duct is used to transfer the cold air in the ice-making compartment back to the freezer compartment, the ice-making air supply duct is connected to the air outlet of the negative pressure generator, and the refrigeration return duct is connected to the air inlet of the negative pressure generator.

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