CN109579421B

CN109579421B - Refrigerator with quick ice making function

Info

Publication number: CN109579421B
Application number: CN201811313429.0A
Authority: CN
Inventors: 姜峰; 陈霄
Original assignee: Qingdao Haier Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2018-11-06
Filing date: 2018-11-06
Publication date: 2020-09-29
Anticipated expiration: 2038-11-06
Also published as: CN109579421A

Abstract

The invention discloses a refrigerator with a rapid ice making function, which comprises a freezing chamber, a freezing evaporator, an air channel for arranging the freezing evaporator and providing cold air for the freezing chamber, and an ice making box which is positioned in the freezing chamber and is provided with an ice making space, wherein the refrigerator is also provided with a cold guide component which is connected with the evaporator and the ice making box when the ice making box makes ice so as to transmit the cold energy of the evaporator to the ice making box; based on the structure of the refrigerator, the cold energy of the evaporator can be directly transmitted to the ice making box through the cold guide assembly in the ice making process, the traditional mode of making ice through air cooling is changed, and the ice making efficiency of the refrigerator can be greatly improved; and based on the ice making mode, the ice making space of the ice making box can be kept in a sealed state in the actual ice making process, so that the made ice blocks are clean and sanitary.

Description

Refrigerator with quick ice making function

Technical Field

The invention relates to the field of household appliances, in particular to a refrigerator with a rapid ice making function.

Background

The refrigerator becomes one of the conventional household appliances in daily life, the refrigerator ice making is more and more popular in application besides the functions of fresh keeping and freezing, and the ice making process of the existing air-cooled refrigerator mainly makes ice by directly blowing cold air on an ice making box. The cold air used in the method is circulating air of the whole refrigerating system, but the following problems exist in the method for making ice by adopting the circulating air of the system: after the cold air passes through the system for multiple cycles, peculiar smell of food is easily carried, even certain bacteria can be carried, so that the ice blocks prepared by the method have peculiar smell, the taste is influenced, and even the ice blocks are unsafe to eat; secondly, because the existing air-cooled refrigerator mainly carries out cold volume transmission through the air so as to realize ice making, the ice making speed is slow, and the ice making speed can be formed within five to six hours under normal conditions, and even if the ice making box is placed at the air outlet position close to the freezing chamber with larger air outlet volume, the ice forming speed is difficult to be greatly improved.

In view of the above, there is a need for an improved refrigerator structure to solve the above problems.

Disclosure of Invention

The present invention is designed to solve at least one of the technical problems of the prior art, and to achieve the above object, the present invention provides a refrigerator having a rapid ice making function, which is specifically designed as follows.

A refrigerator with a quick ice making function comprises a freezing chamber, a freezing evaporator, an air duct for arranging the freezing evaporator and providing cold air for the freezing chamber, and an ice making box which is positioned in the freezing chamber and provided with an ice making space, wherein the refrigerator is also provided with an air duct cover plate for separating the air duct and the freezing chamber, and a cold guide assembly for connecting the evaporator and the ice making box when the ice making box makes ice so as to transmit the cold energy of the evaporator to the ice making box; the refrigerator is characterized in that the refrigerator is also provided with a position retaining assembly for retaining the position of the ice making box during ice making, the position retaining assembly comprises a fixed seat and an elastic piece for connecting the fixed seat and the ice making box, a matching part which is matched with the fixed seat during ice making to lock the relative position of the fixed seat and the freezing chamber is formed in the freezing chamber, and when the fixed seat is matched with the matching part, the elastic piece retains elastic deformation which drives the ice making box to move towards the direction of the air duct cover plate.

Further, the cold guide assembly comprises a heat pipe fixedly connected to the ice making box and abutted to the evaporator during ice making, the refrigerator is provided with an air duct cover plate for separating the air duct from the freezing chamber, and an insertion hole for the heat pipe to penetrate through is formed in the air duct cover plate.

Further, the air duct cover plate is also provided with a sealing element which automatically seals the jack when the heat pipe is separated from the jack.

Furthermore, the heat pipe is provided with a plurality of rod-shaped insertion parts which extend out from one side of the ice making box and penetrate through the plurality of corresponding insertion holes when ice is made, and a plurality of matching holes for the insertion and matching of the rod-shaped insertion parts are formed on the refrigerant flow pipe of the evaporator.

Furthermore, the heat pipe is provided with an insertion part which extends out from one side of the ice making box and penetrates through the insertion hole when ice is made, the front end of the insertion part in the extending direction is planar, and a planar matching part which is attached to the planar front end of the insertion part when ice is made is formed on the refrigerant flow pipe of the evaporator.

Further, the refrigerator has the wall the wind channel with the wind channel apron of freezer, lead cold subassembly and include first heat pipe and second heat pipe, first heat pipe have the butt to the front end of evaporimeter with extend to the wind channel apron in the rear end of freezer one side, second heat pipe fixed connection to on the ice-making box and butt when making ice extremely the rear end of first heat pipe.

Further, an end cover made of a heat insulating material is arranged on the air duct cover plate, and the end cover is provided with a first position allowing the second heat pipe to abut against the rear end of the first heat pipe when ice is made and a second position separating the rear end of the first heat pipe from the freezing chamber when ice is not made.

Furthermore, the rear end of the first heat pipe is bent upwards from the lower side edge of the air duct cover plate to be formed so as to extend to the air duct cover plate on one side of the freezing chamber, the rear end is in a strip shape, and the second heat pipe is provided with a strip-shaped end face matched with the strip-shaped rear end of the first heat pipe during ice making.

Furthermore, the first heat pipe penetrates through the through hole in the air duct cover plate to extend to the air duct cover plate on one side of the freezing chamber, the rear end of the first heat pipe protrudes out of the surface of the air duct cover plate, and a groove for embedding the rear end of the first heat pipe is formed in the second heat pipe when ice is made.

The invention has the beneficial effects that: based on the structure of the refrigerator, the cold energy of the evaporator can be directly transmitted to the ice making box through the cold guide assembly in the ice making process, the traditional mode of making ice through air cooling is changed, and the ice making efficiency of the refrigerator can be greatly improved; and based on the ice making mode, the ice making space of the ice making box can be kept in a sealed state in the actual ice making process, so that the made ice blocks are clean and sanitary.

Drawings

FIG. 1 illustrates a schematic cross-sectional view of a freezer compartment portion of a refrigerator of the present invention;

FIG. 2 shows a first embodiment of the evaporator;

FIG. 3 is a schematic diagram showing the structure of the heat pipe fitting section in the refrigerant flow pipe in FIG. 2;

FIG. 4 is a schematic plan view of a first embodiment of a duct cover;

FIG. 5 shows a schematic cross-sectional view in the direction A-A' of FIG. 4;

fig. 6 shows an ice-making housing structure mated with the duct cover shown in fig. 4;

FIG. 7 shows a second embodiment of the evaporator;

FIG. 8 is a schematic diagram showing the structure of the heat pipe fitting section in the refrigerant flow pipe in FIG. 7;

FIG. 9 is a schematic plan view of a second embodiment of a duct cover;

fig. 10 illustrates an ice-making housing structure mated with the duct cover shown in fig. 9;

FIG. 11 is a schematic plan view of a third embodiment of a duct cover;

FIG. 12 shows a schematic cross-sectional view in the direction B-B' of FIG. 11;

fig. 13 illustrates an ice-making housing structure mated with the duct cover of fig. 11;

FIG. 14 is a schematic plan view of a fourth embodiment of a duct cover;

FIG. 15 shows a schematic cross-sectional view in the direction C-C' of FIG. 14;

fig. 16 illustrates an ice-making housing arrangement that cooperates with the duct cover of fig. 14;

FIG. 17 is a schematic view of a first embodiment of a position maintaining assembly in an unlocked position;

FIG. 18 is a schematic view of a first embodiment of a position maintaining assembly in a locked condition;

FIG. 19 is a schematic view of a second embodiment of a position maintaining assembly shown in an unlocked position;

FIG. 20 is a schematic view of a second embodiment of a position maintaining assembly in a locked state.

Detailed Description

The present invention will be described in detail with reference to various embodiments shown in the drawings, and reference is made to fig. 1 to 20, which are some preferred embodiments of the present invention.

Referring to fig. 1, the refrigerator having a rapid ice making function according to the present invention includes a freezing chamber 10, a freezing evaporator 2, an air duct 30 for seating the freezing evaporator 2 and supplying cool air to the freezing chamber 10, and an ice making housing 4 having an ice making space 40 in the freezing chamber 10. In the practical implementation process, the refrigerator is also provided with a shell 1 enclosing to form a freezing chamber 10, and a heat-preservation foaming layer is usually filled in the shell 1; specifically, in the present embodiment, the air duct 30 is formed in a cavity between the air duct cover plate 3 inside the casing 1 and the rear wall of the casing 1, and the air duct 30 has an air outlet (not shown) for providing cold air to the freezing chamber 10.

As shown in fig. 2 to 16, the refrigerator according to the present invention further includes a cold guide assembly 5 connecting the evaporator 2 and the ice making housing 4 to transmit the cold of the evaporator 2 to the ice making housing 4 when the ice making housing 4 makes ice.

Based on the structure of the refrigerator, the cold energy of the evaporator 2 can be directly transmitted to the ice making box 4 through the cold guide assembly 5 in the ice making process, so that the traditional mode of making ice through air cooling is changed, and the ice making efficiency of the refrigerator can be greatly improved; also, based on such an ice making mode, the ice making space 40 of the ice making housing 4 may be maintained in a sealed state during actual ice making, thereby making the made ice cubes sanitary and clean.

In the specific structure of the ice making box 4 shown in fig. 6, 10, 13 and 16, the ice making space 4 is composed of a plurality of groove arrays, and in the specific implementation process, in order to ensure the cleanness and sanitation of the prepared ice cubes and prevent impurities, bacteria and the like from entering the refrigerating space from the air of the freezing chamber, a cover body (not shown in the figure) is further arranged on the groove body, so that the ice making space 40 is a closed chamber isolated from the freezing chamber.

In some embodiments of the present invention, the cold guide assembly 5 includes a heat pipe fixedly connected to the ice making housing 4 and abutting against the evaporator 2 when making ice, and the air duct cover 3 partitions the air duct 30 from the freezing chamber 10 and is formed with an insertion hole 30 through which the heat supply pipe passes.

Referring to fig. 2, 3, 4, 5 and 6, in the present embodiment, the heat pipes forming the cold conducting assembly 5 have rod-shaped insertion portions 51 extending from one side of the ice making box 4, and the air duct cover plate 3 is formed with a plurality of insertion holes 30 arranged in the same manner as the rod-shaped insertion portions 51; when ice is made, the plurality of rod-shaped insertion portions 51 pass through the plurality of corresponding insertion holes 30 to abut against the evaporator 2, so that rapid transfer of cold can be realized, and ice making efficiency can be effectively improved.

More specifically, referring to fig. 2 and 3, in the present embodiment, in order to make the rod-shaped insertion portion 51 and the evaporator 2 contact well, a plurality of matching holes 210 for inserting and matching the rod-shaped insertion portion 51 are formed on the refrigerant flow tube of the evaporator 2. In addition, in order to avoid influencing the normal flow of the refrigerant in the refrigerant flow pipe and enhance the cold quantity transmission between the refrigerant and the heat pipe rod-shaped insertion portion 51, a heat pipe matching section 21 is formed on the refrigerant flow pipe, wherein the pipe diameter of the heat pipe matching section 21 is larger than the pipe diameters of other positions of the refrigerant flow pipe, and a plurality of matching holes 210 are distributed on the heat pipe matching section 21 and are consistent with the arrangement mode of the insertion holes 30 on the air duct cover plate 3.

Specifically, in the present embodiment, the cross-sectional shape of the rod-like insertion portion 51, the shape of the insertion hole 30, and the shape of the fitting hole 210 are all circular.

In order to make the cold energy transferred to the heat pipes by the evaporator 2 quickly and uniformly transferred to the water in the ice making box 4, as shown in fig. 6, the heat pipes constituting the cold guiding assembly 5 further have pipe bodies (not shown) extending toward the inner side of the ice making box 4 and distributed around the ice making space 40.

In this embodiment, referring to fig. 4 and 5, the duct cover 3 is further provided with a sealing member 300 for automatically sealing the insertion hole 30 when the heat pipe is detached from the insertion hole 30, and the sealing member 300 may be made of an insulating elastic material. When ice making is required, the rod-like insertion portion 51 of the heat pipe pushes the sealing member 300 open and passes through the insertion hole 30 to abut to the evaporator 2; when ice making is not needed, the sealing member 300 made of an elastic material automatically seals the insertion hole 30 to prevent air from forming convection at the insertion hole position, so that influence on air circulation inside the freezing chamber 10 can be reduced, and the heat insulation property of the heat insulation material can also prevent the phenomenon that water vapor in the refrigerator room is condensed to frost at the position due to too low temperature at the insertion hole 30 position.

Referring to fig. 10, in the present embodiment, the heat pipe constituting the cooling conduction assembly 5 has an insertion portion 52 protruding from one side of the ice making box 4 to pass through the insertion hole 30 when making ice, and unlike the embodiment shown in fig. 6, the insertion portion 52 in the present embodiment has a flat shape at the front end in the protruding direction.

As shown in fig. 7, 8 and 10, in the present embodiment, the refrigerant flow tube of the evaporator 2 is formed with a flat surface engaging portion 211 which abuts on the flat surface tip of the insertion portion 52 at the time of ice making. More specifically, a flat fitting portion 211 is formed at a side of the heat pipe fitting section 21 of the evaporator 2 facing the freezing chamber 10 of the refrigerator. Because the heat pipe is abutted against the refrigerant flow pipe of the evaporator 2 in a plane form, the cold quantity transfer can be effectively and quickly realized in a large-area contact mode.

As further shown in fig. 9, the insertion hole 30 of the duct cover 3 according to the present embodiment is elongated for the insertion portion 52 to be inserted smoothly.

In other embodiments of the present invention, the heat pipe constituting the cold guiding assembly 5 may be provided in a two-stage structure. Referring to fig. 11, 12 and 13, the cold guiding assembly 5 of the present embodiment includes a first heat pipe 53 and a second heat pipe 54, wherein the first heat pipe 53 has a front end 531 abutting against the evaporator 2 and a rear end 532 extending to the side of the air duct cover plate 3 of the freezing compartment 10, and the second heat pipe 54 is fixedly connected to the ice making box 4 and abuts against the rear end 532 of the first heat pipe 53 during ice making.

More specifically, referring to fig. 11 and 12, the rear end 532 of the first heat pipe 53 is bent upward from the lower edge of the air duct cover plate 3 to extend to one side of the air duct cover plate 3 facing the freezing chamber 10, and usually the lower edge of the air duct cover plate 3 is an air inlet of the freezing chamber 10, and the cold energy of the evaporator 2 can be transferred to the front side of the air duct cover plate 3 (i.e., the side facing the freezing chamber 10) by bending and extending the first heat pipe 53, and the second heat pipe 54 on the ice making box 4 is matched with the rear end 532 of the first heat pipe 53 at the front side of the air duct cover plate 3, so that the cold energy can be transferred to the ice making box 4, and the implementation process is simple and.

In the embodiment shown in fig. 11 and 12, the rear end 532 of the first heat pipe 53 is elongated, and accordingly, as shown in fig. 13, the second heat pipe 54 has an elongated end surface 541 which is engaged with the elongated rear end 532 of the first heat pipe 53 when ice is made. The matching mode can ensure that the first heat pipe 53 has enough cold energy transfer area after being contacted with the second heat pipe 54. In the implementation, referring to fig. 11 and 13, the heat pipes constituting the cold guiding assembly 5 may include a plurality of sets of first heat pipes 53 and second heat pipes 54 that are matched with each other.

Furthermore, it is understood that in the present embodiment, the manner of fitting between the front end 531 of the first heat pipe 53 and the evaporator 2 may refer to the manner of fitting between the heat pipe and the evaporator 2 in the embodiment shown in fig. 2 to 10.

Referring to fig. 14 and 15, unlike the implementation structure shown in fig. 12, the first heat pipe 53 in this embodiment passes through the through hole of the air duct cover plate 3 to extend to one side of the air duct cover plate 3 of the freezing chamber 10, and in the specific implementation process, the first heat pipe 53 may be cast on the air duct cover plate 3. The rear ends 532 of the first heat pipes 53 protrude out of the surface of the duct cover 3, and as further shown in fig. 16, the second heat pipes 54 are formed with grooves 542 into which the rear ends 532 of the first heat pipes 53 are fitted when making ice. The protruding rear end 532 and the groove 542 can ensure that a tight fit is formed between the first heat pipe 53 and the second heat pipe 54, thereby facilitating the transfer of cold.

As further shown in fig. 15, the air duct cover 6 of the present embodiment is provided with an end cover 6 made of a heat insulating material, and the end cover 6 has a first position allowing the second heat pipe 54 to abut against the rear end 532 of the first heat pipe 53 when ice is made and a second position blocking the rear end 532 of the first heat pipe 53 from the freezing chamber 10 when ice is not made. Specifically, the end cover 6 in the present embodiment is rotatably disposed on the duct cover 3 via a rotating shaft 60. Based on the arrangement, when ice making is not needed, the end cover 6 covers the rear end 532 of the first heat pipe 53, so that the first heat pipe 53 can be prevented from directly contacting the inner space of the freezing chamber 10, and the heat preservation characteristic of the end cover 6 can prevent air in the freezing chamber 10 from being condensed into frost at the position of the rear end 532 of the first heat pipe 53, so that the performance of the refrigerator is influenced.

In the embodiment of the present invention shown in fig. 11 and 12, the front side of the cover plate 3 may also be provided with an end cap 6, which is not further shown.

On the basis of the implementation of the above embodiment, the refrigerator of the present invention further includes a position maintaining assembly for maintaining the position of the ice making box 4 during ice making, the position maintaining assembly includes a fixing seat 71 and an elastic member 72 for connecting the fixing seat 71 and the ice making box 4, a matching portion (not shown in the drawings) which is matched with the fixing seat 71 during ice making to lock the relative position of the fixing seat 71 and the freezing chamber 10 is formed in the freezing chamber 10, and when the fixing seat 71 is matched with the matching portion, the elastic member 72 maintains elastic deformation which drives the ice making box 4 to move towards the air duct cover plate 3.

Referring to fig. 17 and 18, in this embodiment, the fixing seat 71 is located on a side of the ice making housing 4 away from the air duct cover plate 3, and a plurality of springs constituting the elastic member 72 are uniformly distributed and connected between the fixing seat 71 and the ice making housing 4. The fixing base 71 has a pair of extension bars 711 extending towards two sides respectively, the engaging portions in this embodiment are a pair of grooves (not shown) formed on the inner walls of the two opposite sides of the freezing chamber 10, when the two extension bars 711 extend from the two sides of the fixing base 71 respectively, two ends of the two extension bars 711 relatively far away are respectively clamped into the two grooves to prevent the fixing base 71 from further moving. In the specific implementation process, when the telescopic link 711 is fixed to the groove, the springs located between the fixing seat 71 and the ice making box 4 are in a compressed state, and at this time, the springs can drive the ice making box 4 to be tightly pushed towards one side of the air duct cover plate 3 and keep the state that the ice making box 4 is connected with the evaporator 2 through the cold guide assembly 5, so that the cold energy of the evaporator 2 is stably transferred to the ice making box 4.

More specifically, referring to fig. 17 and 18, in the embodiment, the fixing seat 71 of the position maintaining assembly further has a compression spring 713 disposed between the two telescopic rods 711, and the two telescopic rods 711 respectively abut against two ends of the compression spring 713 and compress the compression spring 713 when the two telescopic rods 711 are not ejected; the holder 71 is further provided with a restricting member 712 for holding the compression spring 713 in a compressed state. Specifically, referring to fig. 17, the restriction member 712 engages with two hook engagement portions 7110 of the two extension rods 711 via two hooks 7120, respectively, to hold the compression spring 713 in a compressed state; referring to fig. 18, when the engagement between the hook 7120 of the limiting member 712 and the hook engaging portion 7110 of the telescopic link 711 is released, the telescopic links 711 are ejected to both sides by the compression spring 713, and the ejected telescopic links 711 can engage with the grooves on the inner wall of the freezing chamber 10 to lock the position of the fixing base 71 relative to the freezing chamber 10 during ice making.

Referring to fig. 19 and 20, in another detailed structure of the position maintaining assembly of the present invention, in this embodiment, the fixing base 71 has at least one connecting rod 714 extending toward the air duct cover plate 3, one end of the connecting rod 714 near the air duct cover plate 3 is provided with a magnet 7140, and the air duct cover plate 3 is correspondingly provided with a magnet attaching area (not shown) for attaching the magnet 7140 to lock the position of the fixing base 71 relative to the freezing chamber 10. In this embodiment, one end of the spring constituting the elastic member 72 is fixed on the fixing seat 71 facing the air duct cover plate 3, and the other end is fixed on the ice making box 4, and one end fixed on the ice making box 4 is closer to the air duct cover plate 3. When the magnet 7140 at the end of the connecting rod 714 is adsorbed on the magnet adsorption area of the air duct cover plate 3, the spring of the elastic element 72 is in a compression state, so that the ice making box 4 is driven to be tightly pushed towards one side of the air duct cover plate 3 and the state that the ice making box 4 is connected with the evaporator 2 through the cold guide assembly 5 is maintained, and the cold energy of the evaporator 2 is stably transferred to the ice making box 4.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A refrigerator with quick ice making function comprises a freezing chamber, a freezing evaporator, an air duct for arranging the freezing evaporator and providing cold air for the freezing chamber, and an ice making box which is positioned in the freezing chamber and provided with an ice making space, and is characterized by also comprising an air duct cover plate for separating the air duct and the freezing chamber, and a cold guide component for connecting the evaporator and the ice making box when the ice making box makes ice so as to transmit the cold energy of the evaporator to the ice making box; the refrigerator is characterized in that the refrigerator is also provided with a position retaining assembly for retaining the position of the ice making box during ice making, the position retaining assembly comprises a fixed seat and an elastic piece for connecting the fixed seat and the ice making box, a matching part which is matched with the fixed seat during ice making to lock the relative position of the fixed seat and the freezing chamber is formed in the freezing chamber, and when the fixed seat is matched with the matching part, the elastic piece retains elastic deformation which drives the ice making box to move towards the direction of the air duct cover plate.

2. The refrigerator with the rapid ice making function according to claim 1, wherein the cold guide assembly includes a heat pipe fixedly connected to the ice making housing and abutting against the evaporator when making ice, and the air duct cover plate is formed with an insertion hole through which the heat pipe passes.

3. The refrigerator with a quick ice making function according to claim 2, wherein a sealing member for automatically sealing the insertion hole when the heat pipe is separated from the insertion hole is further provided on the air duct cover plate.

4. A refrigerator as claimed in claim 2 or 3, wherein the heat pipe has a plurality of rod-shaped insertion portions protruding from one side of the ice making housing to pass through the plurality of corresponding insertion holes when making ice, and the refrigerant flow pipe of the evaporator has a plurality of engagement holes formed therein for the rod-shaped insertion portions to be inserted and engaged.

5. The refrigerator as claimed in claim 2 or 3, wherein the heat pipe has an insertion part protruding from one side of the ice making housing to pass through the insertion hole when making ice, the insertion part has a plane shape at a front end in a protruding direction, and a plane engagement part attached to the plane shape front end of the insertion part when making ice is formed on the refrigerant flow pipe of the evaporator.

6. The refrigerator of claim 1, wherein the cold guide assembly includes a first heat pipe having a front end abutting against the evaporator and a rear end extending to one side of the air duct cover plate of the freezing compartment, and a second heat pipe fixedly connected to the ice-making box and abutting against the rear end of the first heat pipe when making ice.

7. The refrigerator with the rapid ice making function according to claim 6, wherein an end cover made of a heat insulating material is provided on the air duct cover plate, and the end cover has a first position allowing the second heat pipe to abut against the rear end of the first heat pipe when ice is made and a second position separating the rear end of the first heat pipe from the freezing chamber when ice is not made.

8. The refrigerator as claimed in claim 6 or 7, wherein the rear end of the first heat pipe is bent upward from the lower edge of the air duct cover to extend to the side of the freezer compartment, and has a long bar shape, and the second heat pipe has a long bar-shaped end surface to engage with the long bar-shaped rear end of the first heat pipe when ice is made.

9. The refrigerator as claimed in claim 6 or 7, wherein the first heat pipe passes through the through hole of the air duct cover to extend to the air duct cover at one side of the freezing chamber, a rear end of the first heat pipe protrudes out of a surface of the air duct cover, and the second heat pipe is formed with a groove into which the rear end of the first heat pipe is inserted when ice is made.