CN216522586U - A kind of refrigerator - Google Patents

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises a refrigerator body, a refrigerant pipe and an ice making unit, wherein the refrigerator body is provided with a refrigerating chamber and a refrigerating chamber; an ice making chamber is limited in the box body, a pipe section of the refrigerant pipe inserted into the ice making chamber is an inward extending section, and the inward extending section is in contact with the bottom of the ice making grid and directly transmits cold energy to the ice making grid, so that the ice making efficiency is effectively improved. The ice making unit comprises a base, a fan assembly, an ice making grid and a drainage tray, the drainage tray is connected with the fan assembly and/or the ice making grid and is positioned below the ice making grid and used for receiving water dripping of the ice making grid, and the drainage tray is provided with a heating element which can evaporate the received water, so that the water is effectively prevented from directly dripping into an ice storage box, and ice cakes are adhered.

Description

A kind of refrigerator

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a refrigerator.

Background

The existing ice making technology in the refrigerator cold storage box usually adopts an air-cooled type ice making technology, a fan is used for extracting cold energy in a refrigeration source, the cold energy is transmitted to an ice making machine through a special conveying pipeline or a special path, and water in an ice making grid of the ice making machine is cooled so as to achieve the purpose of making ice.

In the air-cooled ice making process, because the cold energy needs to circulate in a long and narrow pipeline, the pipeline has large wind resistance and low fan efficiency, and in addition, heat exchange can occur in the conveying process, the heat loss is often large, and the ice making efficiency is poor.

And, the ice-making check may overflow, or because there is the temperature difference in the ice-making room and condensed water drips, if water drips in the ice-storing box directly, can lead to the ice-cube adhesion.

Thus, improvements in the prior art are needed.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the refrigerator is provided to solve the technical problems that the ice making efficiency is poor in an air-cooled ice making mode adopted by the refrigerator in the prior art, an ice making grid is likely to overflow, condensed water drips due to temperature difference in an ice making chamber, and ice blocks are adhered if water directly drips into an ice storage box.

In order to achieve the above object, the present invention provides a refrigerator including:

a case defining a refrigerating chamber therein, the refrigerating chamber defining an ice making chamber therein;

a refrigerant pipe, the pipe section inserted into the ice making chamber is limited as an inward extending section, and is used for supplying cold energy to the ice making chamber;

the ice making machine further comprises an ice making unit, wherein the ice making unit comprises a base, a fan assembly, an ice making grid and a drainage tray;

the base is detachably arranged in the ice making chamber, and the fan assembly is arranged at the bottom of the base;

the ice cube tray is connected with the fan assembly, and the inward extending section is in contact with the bottom of the ice cube tray;

the drainage tray is connected with the fan component and/or the ice making grid and is positioned below the ice making grid, and a heating element is arranged on the drainage tray.

In some embodiments of the present application, a drainage channel is provided on a wall of the ice making chamber, and the drainage tray is communicated with the drainage channel.

In some embodiments of the present application, the drain pan is inclined downwardly toward the drain passage by a first predetermined angle.

In some embodiments of the present application, a limiting hole block is disposed on a rear cavity wall of the ice making chamber;

the refrigerant pipe is limited in a limiting block, the limiting block is used for being inserted into the limiting hole block, the refrigerant pipe is located in the ice making cavity and is the inward extending section, and the refrigerant pipe is located outside the ice making cavity and is the outward extending section.

In some embodiments of the present application, the drainage channel is disposed on a rear wall of the ice making chamber and below the limiting hole block.

In some embodiments of the present application, the front end of the drain pan forms a detachable connection with the fan assembly through a first connection assembly; the rear end of the drainage tray is detachably connected with the rear end of the ice making grid through a second connecting assembly.

In some embodiments of the present application, the first connection assembly includes a card slot and a clip; any one of the clamping groove and the clamping buckle is arranged at the front end of the drainage disc, and the other clamping groove is arranged on the rear side face of the fan assembly.

In some embodiments of the present application, the second connection assembly includes a hook and a rotating shaft;

the hook is arranged at the rear end of the drainage tray, and the rotating shaft is arranged at the rear end of the ice cube tray;

when the drain pan is located at a first predetermined angle, the hook may be hooked on the rotation shaft, and when the drain pan is rotated downward by a second predetermined angle around the rotation shaft after the first coupling assembly is released from the engagement, the hook may be disengaged from the rotation shaft.

In some embodiments of the present application, the drainage channel is a water receiving bucket, the water receiving bucket is located below the inward extending section, and the bottom of the water receiving bucket is inclined downward and forms a drainage pipe penetrating through the rear cavity wall of the ice making chamber.

In some embodiments of the present application, the drain pan is connected to the drain passage through an extension section located below the inwardly extending section.

Compared with the prior art, the refrigerator provided by the embodiment of the utility model has the beneficial effects that:

according to the refrigerator provided by the embodiment of the utility model, the pipe section of the refrigerant pipe inserted into the ice making chamber is directly contacted with the ice making grids, so that the cold energy is directly transmitted to the ice making grids, and the ice making efficiency is effectively improved. And, the below of system ice tray has set up the drain pan, can be used to accept the dripping of system ice tray, and the drain pan is equipped with the heating member and can evaporates the water that receives, effectively avoids water directly to drip to the ice-storage box in, causes the ice-cube adhesion.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic front view of a refrigerator according to an embodiment of the present invention;

fig. 2 is a schematic sectional structure view of a refrigerator according to an embodiment of the present invention;

FIG. 3 is a schematic rear view of the inner container of the refrigerator according to the embodiment of the present invention;

fig. 4 is a schematic sectional structure view of the ice making compartment;

FIG. 5 is an assembled structural schematic view of the ice-making unit;

FIG. 6 is an exploded view of the ice-making unit of FIG. 5;

fig. 7 is a schematic side view of the ice-making unit of fig. 5;

FIG. 8 is a schematic bottom view of the ice-making unit and the refrigerant tube of FIG. 5;

fig. 9 is an assembly structure view of an ice making unit of another embodiment;

fig. 10 is an exploded view of the ice-making unit of fig. 9;

FIG. 11 is an exploded view of a fan assembly;

FIG. 12 is a side view schematic diagram of the ice-making unit of FIG. 9;

FIG. 13 is a cross-sectional view A-A of FIG. 12;

fig. 14 is a structural schematic view of a refrigerant pipe and an ice making chamber;

FIG. 15 is a schematic view of the air circulation within the ice-making chamber;

FIG. 16 is a schematic view of the structure of the fixing plate;

FIG. 17 is a schematic view showing an exploded structure at a fixed disk in another embodiment;

FIG. 18 is a schematic view of the holding pan of FIG. 17 in an inverted configuration;

FIG. 19 is a schematic view showing the mounting and dismounting of the drain pan;

110. a refrigeration chamber; 120. a freezing chamber; 130. an ice making chamber; 131. a limiting hole block; 132. a limiting block; 210. a refrigerating chamber door; 220. a freezing chamber door; 310. a refrigerant pipe; 311. An inward extending section; 312. an extension section; 133. reinforcing buckles; 134. a drainage channel; 320. a compressor; 330. a condenser; 340. a valve; 350. an evaporator;

400. an ice making unit; 410. a base; 411. a water injection port; 420. a fan assembly; 421. an outer housing; 4211. an air suction hole; 4212. an air outlet; 422. a circulation fan; 423. a control unit; 425. buckling; 426. a first engaging portion; 430. an ice making grid; 431. heat conducting fins; 432. A first locking member; 433. a rotating shaft; 434. a first shaft member; 441. air return holes; 440. fixing the disc; 442. a support assembly; 4421. a tightening part; 4422. an elastic portion; 4423. supporting a groove; 443. A second locking member; 444. a second shaft member; 445. a second engaging portion; 450. a drain pan; 451. A card slot; 452. hooking; 460. an ice turning rod; 470. an upper cover plate; 471. a wind hole; 480. heating a tube; 500. an ice storage container; 600. a dispenser.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1 to 3, which are front views of a refrigerator according to a preferred embodiment of the present invention, mainly include a cabinet, a door, a refrigeration cycle system, an ice making unit 400, an ice storage container 500, and a dispenser 600.

Referring to fig. 1, the interior of the case defines a refrigerating chamber 110 above and a freezing chamber 120 below, wherein an ice making chamber 130 is defined at one side of the top inside the refrigerating chamber 110 by an insulating case. The door includes a pair of refrigerating chamber door 210 and freezing chamber door 220 which are left and right split around an axis. In the following embodiments, the side of the door is forward.

Referring to fig. 2, the refrigeration cycle system includes a refrigerant pipe 310, and a compressor 320, a condenser 330, a valve 340, and an evaporator 350 connected to the refrigerant pipe 310, wherein the evaporator 350 is provided in the freezing chamber 120. The refrigerant flowing through the refrigerant pipe 310 is sent out through the compressor 320, passes through the condenser 330, is controlled to be on and off by the valve 340, and thus selectively flows through the evaporator 350 or the refrigerant pipe 310, and then flows through the evaporator 350 to perform heat exchange through expansion to cool a corresponding reached space.

Referring to fig. 1 and 4, the ice making unit 400, the ice storage container 500, and the dispenser 600 together constitute an ice making system. The ice making unit 400 is provided at the top of the ice making chamber 130 to make and turn ice. The ice storage container 500 is provided below the ice-making unit 400 to store ice pieces falling from the ice-making unit 400. The dispenser 600 is provided on the refrigerating chamber door 210 and communicates with the ice storage container 500 through a duct (not shown), and a user can take ice from the dispenser 600.

Referring to fig. 5 to 13, the ice making unit 400 includes a base 410, a fan assembly 420, an ice making housing 430, a fixing tray 440, a drain tray 450, an ice turning lever 460, an upper cover 470, and a heating duct 480.

Referring to fig. 5, the base 410 may be detachably mounted at the inner top of the ice making chamber 130 by a snap or screw structure, and a water filling port 411 is provided on the base 410 for an external water filling pipe to fill water into the ice making tray 430.

Referring to fig. 5 and 6, the fan assembly 420 is disposed at the bottom of the base 410, and the rear direction thereof is a suction side, and the front direction thereof is a downward direction thereof or the lateral direction thereof is an air outlet side. For example, in the embodiment shown in fig. 5-8, the forward direction is the air outlet side, and in the embodiment shown in fig. 9-13, the downward direction is the air outlet side. The lateral direction is the air outlet side. Referring to fig. 6, the blower assembly 420 includes an outer case 421, a circulation fan 422, and a control unit 423. The outer housing 421 is connected to the bottom of the front end of the base 410, and the outer housing 421 may be formed by two half housings that are fastened to each other. The outer shell 421 has a suction hole 4211 at the rear, as shown in fig. 11, and a blowing hole 4212 at the front, downward or lateral, as shown in fig. 7 and 9. The circulation fan 422 is provided in the outer case 421, and the rear direction of the outer case 421 is a suction side. The control unit 423 is electrically connected to the circulating fan 422, and the control unit 423 includes a control for controlling the on/off of the circulating fan 422, so as to control the operation of the circulating fan 422.

Referring to fig. 4, a pipe section of the refrigerant pipe 310 inserted into the ice making chamber 130 is defined as an inward extending section 311, and an outward extending section 312 is located outside the ice making chamber 130, and the outward extending section 312 is communicated with other structures of the refrigeration cycle system. Specifically, referring to fig. 14, the rear cavity wall of the ice making chamber 130 is provided with a limiting hole block 131, the refrigerant pipe 310 is limited in a limiting block 132, and the limiting block 132 is inserted into the limiting hole block 131 to form a fixed fit, and the fixing effect can be more stable through a reinforcing buckle 133.

Referring to fig. 5 and 9, the ice making housing 430 is connected to a rear side of the outer case 421, i.e., on a suction side of the circulation fan 422. The ice cube tray 430 is made of a high thermal conductive metal material. Referring to fig. 7, the bottom of the ice making tray 430 may be further provided with a heat conductive rib 431 to improve heat exchange efficiency.

Referring to fig. 7, the inward extending section 311 contacts the bottom of the ice cube tray 430, and when ice is made, the cold energy is directly transferred to the ice cube tray 430, so that the water in the ice cube tray 430 is frozen into ice cubes. Specifically, referring to fig. 13, the inwardly extending section 311 is U-shaped, and the bottom of the ice cube tray 430 is provided with a U-shaped groove for receiving the inwardly extending section 311.

Referring to fig. 10, 12 and 13, a heating pipe 480 is disposed at the bottom of the ice making tray 430, the heating pipe 480 may be electrically connected to the control unit 423, and the control unit 423 includes a control element for controlling the opening and closing of the heating pipe 480, so that after ice making is completed, the heating pipe 480 is controlled to heat the ice making tray 430, so that the bottom of ice cubes is slightly melted, and subsequent ice removing is facilitated. The heating tube 480 may be U-shaped, the heating tube 480 is large U-shaped, the inner extension 311 is small U-shaped, the inner extension 311 is located inside the heating tube 480, and the heating tube 480 and the inner extension 311 are located at different height layers, as shown in the figure, the heating tube 480 is higher than the inner extension 311.

Referring to fig. 7, the fixed tray 440 is detachably connected to the bottom of the ice cube tray 430, so that the inward extending section 311 is closely attached to the bottom of the ice cube tray 430, an air passage is formed between the bottom surface of the fixed tray 440 and the bottom of the ice cube tray 430, and the air suction hole 4211 corresponds to the air passage.

Referring to fig. 7 and 16, the fixing plate 440 may be detachably coupled to the ice cube tray 430 by screws. Specifically, a first locking member 432 is provided at the bottom of the ice cube tray 430, and a second locking member 443 is provided at a corresponding position on the bottom surface of the fixed tray 440. Wherein the first locking member 432 can be a stud and the second locking member 443 can be a screw, and the stud and the screw cooperate to form a detachable connection.

Referring to fig. 17 and 18, the fixing tray 440 may be detachably coupled to the ice cube tray 430 by a rotation shaft structure. Specifically, a first shaft 434 is disposed at one end of the ice cube tray 430 away from the fan assembly 420, and a second shaft 444 is correspondingly disposed at one side of the fixed tray 440 away from the fan assembly 420. The first shaft 434 may be a shaft hole, and the second shaft 444 may be a rotating shaft, which are engaged with each other so that the fixing plate 440 may be turned downward relative to the ice cube tray 430 along the rotating shaft, as shown in fig. 18. Meanwhile, one end of the outer housing 421 of the fan assembly 420 facing the ice cube tray 430 is provided with a first locking portion 426, and the other end of the fixed tray 440 opposite to the second shaft 444 is provided with a second locking portion 445. The first locking part 426 is a locking groove, the second locking part 445 is a locking hook, and after the fixing tray 440 rotates in place, the locking hook is locked in the locking groove to form a locking connection, so that the fixing tray 440 is fixed at the bottom of the ice cube tray 430. In addition, a second locking member 443 may be further provided on the bottom surface of the fixed platter 440, and the second locking member 443 may be provided at a corresponding position on the bottom surface of the fixed platter 440, to form a further reinforcing connection. When the fixed tray 440 is mounted at the bottom of the ice cube tray 430, one end of the fixed tray 440 is rotatably connected with the ice cube tray 430, which is equivalent to pre-connection, and the pre-connection does not need to be positioned on site by workers, so that the mounting operation of the workers can be effectively facilitated, the mounting difficulty is reduced, the mounting efficiency is improved, and the mounting and dismounting are more convenient.

Referring to fig. 16, a supporting member 442 is disposed on the bottom surface of the fixing plate 440 for supporting the inner extension 311. The support assembly 442 includes a tightening portion 4421 and an elastic portion 4422. The bottom of the tightening part 4421 is disposed on the bottom surface of the fixed plate 440, and the top thereof is provided with an elastic part 4422 for contacting with the inward extending section 311. Specifically, one side of the elastic part 4422 is connected with the tightening part 4421 through a screw, and the other side is provided with a bracket 4423, wherein the bracket 4423 is semicircular and is used for supporting the inward extending section 311. The fixing plate 440 and the tightening portion 4421 are made of a metal material with high thermal conductivity, and the elastic portion 4422 is made of a rubber material, which prevents damage to the inwardly extending section 311 when tightened. When the second locking member 443 is connected and locked with the first locking member 432, the support assembly 442 presses the inwardly extending section 311 against the bottom of the ice making compartment 430 to ensure that the inwardly extending section 311 is in close contact with the ice making compartment 430. The bottom surface of the fixed tray 440 is further provided with a plurality of air return holes 441.

Referring to fig. 5, the drain pan 450 is connected to the outer case 421 and positioned below the fixed pan 440 to form a return air duct with the fixed pan 440. The drain pan 450 may serve to receive overflow or condensed water of the ice making compartments 430, thereby preventing water from dropping onto the ice storage container 500 to freeze and stick ice pieces. The drain pan 450 is provided with a heating element to accelerate the evaporation of water from the drain pan 450.

Referring to fig. 4, the rear cavity wall of the ice making chamber 130 is provided with a drainage channel 134 below the stopper 131, and a drainage tray 450 is communicated with the drainage channel 134. Also, the drain pan 450 may be inclined downward toward the drain passage 134 to facilitate faster draining of the drip water.

Referring to fig. 6, the front end of the drain pan 450 is detachably connected to the fan assembly 420 by a first connection assembly, and the rear end of the drain pan 450 is detachably connected to the rear end of the ice cube tray 430 by a second connection assembly. Specifically, the first connection assembly includes a locking groove 451 provided at the front end of the drain pan 450 and a locking buckle 425 provided at the rear side of the outer housing 421. The second coupling assembly includes a hook 452 provided at a rear end of the drain pan 450 and a rotation shaft 433 provided at a rear end of the ice making housing 430. Referring to fig. 19, when the drain pan 450 is positioned at a first predetermined angle, the hook 452 may be hooked on the rotation shaft 433, and when the drain pan 450 is rotated downward by a second predetermined angle about the rotation shaft 433 after the first coupling assembly is disengaged, the hook 452 may be disengaged from the rotation shaft 433, thereby completely removing the drain pan 450 and facilitating the installation of the inward extending section 311.

Referring to fig. 4, the drain passage 134 is a water receiving funnel located below the inward extending section 311, the bottom of which is inclined downward and forms a drain pipe penetrating the rear cavity wall of the ice making chamber 130. The drain pan 450 is connected to the drain channel 134 via an extension 453, and the extension 453 is located below the inward-extending section 311, and is used to receive the condensed water from the inward-extending section 311, so as to prevent the condensed water from dripping on the surface of the ice making chamber 130, which may cause the problem of frosting at the bottom of the ice making chamber 130.

Referring to fig. 6 and 10, the ice turning bar 460 is located above the ice making compartment 430, and a rotation driving unit 424 is further disposed in the outer case 421, as shown in fig. 11. One end of the ice-turning bar 460 penetrates into the outer case 421 to be connected to the rotational driving unit 424, and the rotational driving unit 424 is used to drive the ice-turning bar 460 to rotate in a predetermined direction to make the ice cubes in the ice-making compartment 430 to be released. Specifically, the ice turning bar 460 specifically includes a rotating shaft and a cross bar disposed on the rotating shaft and corresponding to the number and position of the ice cells of the ice making cells 430, and when the ice turning bar 460 rotates, the cross bar turns out the ice cubes in the ice cells, so that the ice cubes are separated from the ice making cells 430 and fall into the ice storage container 500.

Referring to fig. 6 and 10, an upper cover plate 470 is erected at the top of the side of the ice making compartment 430, and is provided with an escape groove for receiving the ice-turning bar 460. The outer side of the upper cover plate 470 extends downward to form a side wing, and the side wing is provided with a plurality of wind holes 471.

Referring to fig. 15, when the fan assembly 420 is operated, the circulation fan 422 draws air from the suction side, that is, draws cool air from the air duct between the fixed tray 440 and the ice cube tray 430, and blows air to the air outlet side, or blows air forward if the air outlet side is forward in fig. 15. The cool air moves forward and downward, passes through the forward corner position of the ice making chamber 130 and the ice storage container 500 therebelow, continues to pass through the backward corner position of the ice making chamber 130 and the return duct between the drain pan 450 and the stationary pan 440, and is again sucked by the circulation fan 422 through the return hole in the bottom of the stationary pan 440. The air in the ice making chamber 130 exchanges heat in the above-described wind circulation, so that the regions of the ice making unit 400 and the ice storage container 500 in the entire ice making chamber 130 are in a state of uniform temperature.

The present application provides a refrigerator with an ice making function, in which a pipe section of a refrigerant pipe 310 inserted into an ice making chamber 130 is in direct contact with an ice making tray 430, and cold energy is directly transmitted to the ice making tray 430, thereby effectively improving ice making efficiency. In addition, the fan assembly 420 for driving the air circulation in the ice making chamber 130 is integrated with other parts of the ice making unit, the ice making grid 430 is positioned at the suction side of the fan assembly 420, and the fan assembly 420 can directly suck cold air at the refrigerant pipe 310 to blow out the cold air into the ice making chamber 130, so that the air circulation is improved while the structure is simplified, the temperature balance state in the ice making chamber 130 is facilitated, and the problems of frosting, ice block adhesion or melting and the like caused by temperature difference are effectively solved.

In some embodiments of the present disclosure, a fixing plate 440 for tightly fixing the refrigerant pipe 310 to the bottom of the ice making tray 430 is disposed at the bottom of the ice making tray 430, so as to ensure effective contact between the refrigerant pipe 310 and the ice making tray 430, thereby ensuring sufficient heat transfer area between the refrigerant pipe 310 and the ice making tray 430, and enabling the cold energy generated by the refrigerant pipe 310 to be transferred to the ice making tray 430 most efficiently. And, an air duct is formed between the fixed tray 440 and the ice cube tray 430, and the fan assembly 420 may directly suck cold air in the air duct.

In some embodiments of the present application, a drain pan 450 is provided under the fixed tray 440 to receive overflow water or condensed water of the ice making compartments 430 to prevent water from dropping on the ice storage container 500 to freeze and stick ice cubes. And, an air return passage is formed between the drain pan 450 and the fixed pan 440, and air may flow back from the ice storage container 500 to the air return passage to be re-sucked by the blower assembly 420.

In some embodiments of the present application, the bottom of the fixed tray 440 is provided with a return hole 441, and air in the return duct can enter the ventilation duct through the return hole 441 and then be sucked by the fan assembly 420.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. A refrigerator, comprising:

a case defining a refrigerating chamber therein, the refrigerating chamber defining an ice making chamber therein;

a refrigerant pipe, the pipe section inserted into the ice making chamber is limited as an inward extending section, and is used for supplying cold energy to the ice making chamber;

the ice making machine is characterized by further comprising an ice making unit, wherein the ice making unit comprises a base, a fan assembly, an ice making grid and a drainage tray;

the base is detachably arranged in the ice making chamber, and the fan assembly is arranged at the bottom of the base;

the ice cube tray is connected with the fan assembly, and the inward extending section is in contact with the bottom of the ice cube tray;

the drainage tray is connected with the fan assembly and/or the ice cube tray and is positioned below the ice cube tray, and a heating element is arranged on the drainage tray.

2. The refrigerator of claim 1, wherein a wall of the ice making chamber is provided with a drain passage, and the drain pan is in communication with the drain passage.

3. The refrigerator of claim 2, wherein the drain pan is inclined downward toward the drain passage by a first predetermined angle.

4. The refrigerator of claim 3, wherein a stopper hole block is provided on a rear cavity wall of the ice making chamber;

the refrigerant pipe is limited in a limiting block, the limiting block is used for being inserted into the limiting hole block, the refrigerant pipe is located in the ice making cavity and is the inward extending section, and the refrigerant pipe is located outside the ice making cavity and is the outward extending section.

5. The refrigerator of claim 4, wherein the water drain passage is provided at a rear wall of the ice making chamber and below the stopper hole block.

6. The refrigerator of claim 1, wherein the front end of the drain pan is detachably connected to the blower fan assembly by a first connection assembly; the rear end of the drainage tray is detachably connected with the rear end of the ice making grid through a second connecting assembly.

7. The refrigerator according to claim 6, wherein the first connection assembly includes a card slot and a clip; any one of the clamping groove and the clamping buckle is arranged at the front end of the drainage disc, and the other clamping groove is arranged on the rear side face of the fan assembly.

8. The refrigerator of claim 7, wherein the second connecting assembly includes a hook and a rotating shaft;

the hook is arranged at the rear end of the drainage tray, and the rotating shaft is arranged at the rear end of the ice cube tray;

when the drain pan is located at a first predetermined angle, the hook may be hooked on the rotation shaft, and when the drain pan is rotated downward by a second predetermined angle around the rotation shaft after the first coupling assembly is released from the engagement, the hook may be disengaged from the rotation shaft.

9. The refrigerator of claim 2, wherein the drain channel is a water receiving funnel positioned below the inwardly extending section, the bottom of which slopes downward and forms a drain through a rear cavity wall of the ice making chamber.

10. The refrigerator of claim 9 wherein the drain pan is connected to the drain passage by an extension below the inwardly extending section.

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