CN214039048U - Heat exchanger and refrigerator - Google Patents

Abstract

The utility model provides a heat exchanger, include: a cold conducting plate; the cooling guide plates are arranged on the front surface and/or the rear surface of the cooling guide plate at intervals, and an airflow channel is defined between the adjacent cooling guide fins positioned on the same side of the cooling guide plate; and the heating rod is configured to be fixedly inserted with the cold guide plate and/or the cold guide fins and used for providing heat required by defrosting of the heat exchanger. The heat exchanger of the utility model has simple structure and easy manufacture, and can realize large-area heat exchange and improve the heat exchange efficiency; through configuring the heating rod into and leading cold drawing and/or leading cold fin grafting fixed for this heat exchanger's defrosting structure disposes very easily, and assembly efficiency improves, and processing cost reduces.

Description

Heat exchanger and refrigerator

Technical Field

The utility model relates to a refrigeration field especially relates to a heat exchanger and refrigerator.

Background

With the health emphasis of people, the household stock of high-end food materials is also increasing. According to the research, the storage temperature of the food material is lower than the glass transition temperature, the property of the food material is relatively stable, and the quality guarantee period is greatly prolonged. Wherein the glass transition temperature of the food material is mostly concentrated at-80 ℃ to-30 ℃. The existing household refrigerator adopting Stirling refrigeration has the problems that the structure of a heat exchanger of a Stirling refrigeration system is complex, and a defrosting part is not easy to configure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, the heat exchanger that the part of changing frost disposes easily.

A further object of the present invention is to provide a heat exchanger with good defrosting effect.

In particular, the present invention provides a heat exchanger comprising:

a cold conducting plate;

the cooling guide plates are arranged on the front surface and/or the rear surface of the cooling guide plate at intervals, and an airflow channel is defined between the adjacent cooling guide fins positioned on the same side of the cooling guide plate; and

and the heating rod is configured to be fixedly inserted with the cold guide plate and/or the cold guide fin and used for providing heat required by defrosting of the heat exchanger.

Optionally, the heating rod is configured to be fixedly inserted into the cold guide plate.

Optionally, the cold guide plate is provided with a fixing groove along the front-back direction;

the heating rod is configured to be inserted into the fixing groove to realize the insertion and fixing with the cold guide plate.

Optionally, the number of the fixing grooves is at least four, and the fixing grooves are evenly distributed on the cold guide plate;

the number of the heating rods is at least four, and the heating rods correspond to one fixing groove respectively.

Optionally, the cooling guide fins are formed by extending forwards from the front surface of the cooling guide plate;

the front end of each heating rod is respectively connected with a lead, and a plurality of leads are gathered at the front side of the cold guide fins.

Optionally, the heating rod is of cylindrical configuration;

the fixed slot is the cylinder structure, and the external diameter of heating rod slightly is greater than the internal diameter of fixed slot.

Optionally, the heating rod is a steel tube with a diameter of 5-10 mm.

Optionally, the surface of the heating rod is coated with a thermally conductive grease.

The utility model also provides a refrigerator has aforementioned heat exchanger.

Optionally, the refrigerator comprises:

the refrigerator comprises a refrigerator body, a storage compartment and a storage box, wherein the refrigerator body is internally limited with the storage compartment;

the heat exchanger is arranged in the at least one storage room, the cold guide fins extend forwards from the front surface of the cold guide plate, and the rear surface of the cold guide plate is provided with a first adapter;

the cold guide device comprises a second adapter and a cold guide heat pipe; and

the Stirling refrigerator, the cold junction fixed thermal connection of second adapter and Stirling refrigerator, the one end and the second adapter fixed thermal connection of leading cold heat pipe, the other end and first adapter fixed thermal connection to the realization utilizes the Stirling refrigerator to the room cooling between the storing.

The heat exchanger comprises the cold guide plate and the cold guide fins, the cold guide fins are arranged on the front surface and/or the rear surface of the cold guide plate at intervals, and an airflow channel is defined between the adjacent cold guide fins positioned on the same side of the cold guide plate, so that the heat exchanger has a simple structure and is easy to manufacture, large-area heat exchange can be realized, and the heat exchange efficiency is improved; through configuring the heating rod into and leading cold drawing and/or leading cold fin grafting fixed for this heat exchanger's defrosting structure disposes very easily, and assembly efficiency improves, and processing cost reduces.

Further, the utility model discloses a heat exchanger is through offering the fixed slot along the fore-and-aft direction on leading the cold plate, configures the heating rod to realize in inserting the fixed slot and lead the cold plate grafting fixed, can realize improving the defrosting efficiency to leading the cold plate from inside to outside complete heating.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic perspective view of a heat exchanger according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of the heat exchanger shown in fig. 1.

Fig. 3 is a front view of a portion of the components of a refrigerator having the heat exchanger shown in fig. 1.

Fig. 4 is a perspective view of a part of components of the refrigerator shown in fig. 3.

Fig. 5 is a perspective view of the stirling refrigeration system of the refrigerator shown in fig. 3.

Fig. 6 is an exploded schematic view of a double door and a door frame of the refrigerator shown in fig. 3.

Fig. 7 is a partially enlarged schematic view of fig. 6.

Detailed Description

In the following description, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "left", "right", etc. is an orientation based on the refrigerator 100 itself as a reference, as shown in fig. 4.

Fig. 1 is a perspective view of a heat exchanger 305 according to an embodiment of the present invention. Fig. 2 is an exploded schematic view of the heat exchanger 305 shown in fig. 1. Fig. 3 is a front schematic view of a portion of the components of the refrigerator 100 having the heat exchanger 305 shown in fig. 1. Fig. 4 is a schematic perspective view of a part of the components of the refrigerator 100 shown in fig. 3. Fig. 5 is a perspective view of the stirling refrigeration system of the refrigerator 100 shown in fig. 3.

The heat exchanger 305 of embodiments of the present invention may generally include: a cold conduction plate 351, a plurality of cold conduction fins 352, and a heating rod 353. A plurality of cooling guide fins 352 are spaced apart from the front and/or rear surface of the cooling guide plate 351, and air flow passages are defined between adjacent cooling guide fins 352 on the same side of the cooling guide plate 351. The heating rods 353 are configured to be inserted into the cooling guide plate 351 and/or the cooling guide fins 352 for providing heat required for defrosting of the heat exchanger 305. The heat exchanger 305 according to the embodiment of the present invention includes the cold guiding plate 351 and the cold guiding fins 352, the cold guiding fins 352 are configured to be disposed at intervals on the front surface and/or the rear surface of the cold guiding plate 351, and an airflow channel is defined between the adjacent cold guiding fins 352 on the same side of the cold guiding plate 351, so that the heat exchanger 305 has a simple structure and is easy to manufacture; when the heat exchanger 305 is applied to a refrigeration system of the refrigerator 100, for example, large-area heat exchange can be realized, and the heat exchange efficiency is improved; by arranging the heating rod 353 to be fixedly inserted with the cold guide plate 351 and/or the cold guide fins 352, the defrosting structure of the heat exchanger 305 is very easy to arrange, the assembly efficiency is improved, and the processing cost is reduced.

The plurality of cooling guide fins 352 may be disposed at intervals on the front surface and/or the rear surface of the cooling guide plate 351, that is, the plurality of cooling guide fins 352 may be disposed only at intervals on the front surface of the cooling guide plate 351, may be disposed only at intervals on the rear surface of the cooling guide plate 351, or may be disposed with the cooling guide fins 352 on both the front surface and the rear surface of the cooling guide plate 351. When there are more than two cooling guide fins 352 on the same side of the cooling guide plate 351, an air flow passage is defined between the adjacent cooling guide fins 352. In consideration of the practical application of the heat exchanger 305, a plurality of cooling guide fins 352 are spaced apart from the front surface of the cooling guide plate 351. Taking the refrigerator 100 shown in fig. 3 to 5 as an example, the heat exchanger 305 of the embodiment of the present invention can be used as a part of the stirling refrigerating system of the refrigerator 100. As shown in fig. 5, the heat exchanger 305 is disposed to be inclined in a vertical direction, a front surface of the cold guide plate 351 is a side of the cold guide plate away from the stirling cooler 300 of the stirling cooling system, and a rear surface of the cold guide plate is a side close to the stirling cooler 300, and a plurality of cold guide fins 352 are disposed at intervals on the front surface of the cold guide plate 351, so that the first adapter 360 can be disposed on the rear surface of the cold guide plate 351 at the same time, thereby facilitating the heat exchanger 305 to be stably and thermally connected to the stirling cooler 300.

In some embodiments, heater bars 353 of heat exchanger 305 of embodiments of the present invention are configured to be secured to cold guide plate 351 in a bayonet-type manner. Because a plurality of cold fin 352 of leading all are connected with cold plate 351, with heating rod 353 and lead cold plate 351 grafting fixed with heating rod 353 and lead cold fin 352 grafting fixed compare, can make heating rod 353's heat transfer effect better, and then improve the defrosting efficiency.

In some embodiments, the cold conducting plate 351 of the heat exchanger 305 of the embodiment of the present invention is provided with a fixing groove 350 along the front-back direction; the heating rod 353 is configured to be inserted into the fixing groove 350 to be fixedly inserted into the cold guide plate 351. The utility model discloses heat exchanger 305 is through offering the fixed slot 350 along the fore-and-aft direction on leading cold plate 351, configure heating rod 353 to insert in fixed slot 350 to realize with leading cold plate 351 grafting fixed, can realize leading cold plate 351 from inside to outside complete heating, further improve and change frost efficiency, such frosting mode of from inside to outside complete heating makes this heat exchanger 305 more can adapt to stirling refrigerating system's ultra-low temperature environment, this heat exchanger 305 especially can be applied to among the stirling refrigerating system.

The specific number of the heating rods 353 can be calculated according to the heating amount required for defrosting. Referring to fig. 1 and 2, the number of the fixing grooves 350 is at least four, and is evenly distributed on the cold guide plate 351; the number of the heating rods 353 is at least four, and each corresponds to one fixing groove 350. The heat of the heating rods 353 can be further promoted to be uniformly and rapidly transferred on the cold guide plate 351 by evenly distributing at least four fixing grooves 350 and the heating rods 353 on the cold guide plate 351. In theory, one or more heating rods 353 may be disposed in each fixing groove 350, and it is preferable to dispose one heating rod 353 in each fixing groove 350 in view of easy assembly, subsequent maintenance, and full use of heat of each heating rod 353.

With continued reference to fig. 1 and 2, the cooling fins 352 extend forwardly from the front surface of the cooling plate 351; the leading end of each heating rod 353 is connected to a lead wire 354, and the lead wires 354 are collected on the front side of the cooling guide fin 352. By respectively connecting each heating rod 353 with the conducting wire 354, each heating rod 353 can be independently controlled, and further more precise defrosting control such as local defrosting, different heating rods 353 with different heating powers and the like can be realized; by collecting the plurality of conducting wires 354 at the front side of the cooling guide fin 352, the conducting wires 354 occupy the airflow channel as little as possible, so that the airflow channel is kept smooth, and the heat exchange efficiency is not affected. The insulating material of the conductive line 354 may be teflon, which is resistant to low temperature.

As shown in fig. 2, the heating rod 353 has a cylindrical structure; the fixing groove 350 has a cylindrical structure, and the outer diameter of the heating rod 353 is slightly larger than the inner diameter of the fixing groove 350. Through setting heating rod 353 to cylindrical, supporting internal diameter slightly is less than the cylinder fixed slot 350 of its external diameter, can make heating rod 353 and fixed slot 350 realize firmly conveniently promptly very firmly assembling, and heating rod 353 and fixed slot 350 simple structure, processing is changeed. The heating rod 353 may be a steel pipe having a diameter of 5-10 mm. The heating rod 353 of the steel pipe has good thermal conductivity and proper strength, and is conveniently assembled in the fixing groove 350. The diameter of the heating rod 353 is 5-10mm, so that the cold guide fins 352 are arranged on the cold guide plate 351 due to the fact that the heating rod 353 is too thick can be avoided, and the problem that heating efficiency is low due to the fact that the heating rod 353 is too thin can be solved. The length of the heater bar 353 is generally slightly less than the thickness of the cold plate 351. In order to further enhance the heat transfer between the heating rod 353 and the cold guide plate 351, the surface of the heating rod 353 may be coated with a heat conductive grease.

As previously mentioned, the heat exchanger 305 of the present embodiment is particularly suitable for use in a stirling refrigeration system. Referring to fig. 3 to 7, the refrigerator 100 having the heat exchanger 305 according to the embodiment of the present invention will be described in detail. The refrigerator 100 of the embodiment of the present invention may generally include: a cabinet 101 and a stirling refrigeration system. The box body 101 is internally provided with storage chambers, and at least one storage chamber is a deep cooling chamber 112. The stirling refrigeration system is configured to provide refrigeration to cryogenic compartment 112. The stirling refrigeration system includes a stirling cooler 300, a heat exchanger 305 and a cold sink 303. Wherein, heat exchanger 305 is disposed in deep cooling compartment 112, cooling guide fins 352 are formed by extending forward from the front surface of cooling guide plate 351, and the rear surface of cooling guide plate 351 is disposed with first adapter 360. The cold guiding device 303 includes a second adapter 331 and a cold guiding heat pipe 332. The second adapter 331 is fixedly and thermally connected with the cold end of the Stirling refrigerator 300, one end of the cold conduction heat pipe 332 is fixedly and thermally connected with the second adapter 331, and the other end of the cold conduction heat pipe 332 is fixedly and thermally connected with the first adapter 360, so that the Stirling refrigerator 300 is utilized to supply cold to the storage room. A heat insulating member 306 may be provided outside the cooling guide 303. By thermally connecting the heat exchanger 305 and the stirling cooler 300 by the cold conduction device 303 including the second adapter 331 and the cold conduction heat pipe 332, the cold transfer can be efficiently achieved while several components can be stably connected.

The box 101 may include a casing, an inner container disposed in the casing, and a heat insulation layer disposed between the casing and the inner container. The inner container defines a storage compartment, and the refrigerator 100 may include at least one common inner container defining a common compartment 111 and at least one cryogenic inner container defining a cryogenic compartment 112. Herein, the "normal liner" refers to other liners except for the cryogenic liner, such as a refrigerating liner, a freezing liner, and a temperature-changing liner. Correspondingly, the "ordinary compartment" refers to other non-ultralow temperature compartments, such as a refrigerating compartment, a freezing compartment and a temperature-changing compartment, which are not cooled by the stirling refrigerating system and cannot realize ultralow temperature, except the cryogenic compartment 112, and are respectively defined by a refrigerating liner, a freezing liner and a temperature-changing liner. The preservation temperature of the cold storage chamber can be 4-7 ℃ generally, and the preservation temperature of the freezing chamber can be-20-16 ℃ generally. The temperature-changing chamber can be adjusted according to requirements and used as a refrigerating chamber or a freezing chamber. Cryogenic compartment 112 refers to a compartment that is cooled using at least a stirling refrigeration system. In the embodiment shown in fig. 3, the refrigerator 100 is a cross-door refrigerator, and the storage compartments include a refrigerating compartment (not shown) located at the upper portion, a freezing compartment located at the right side of the lower portion, a temperature-changing compartment located above the left side of the lower portion, and a deep-cooling compartment 112 located below the left side of the lower portion.

In the refrigerator 100 shown in fig. 3, an air duct cover (not shown) is disposed inside the rear wall of the deep cooling compartment 112, an air supply opening is disposed at the upper portion of the air duct cover, an air return opening is disposed at the lower portion of the air duct cover, an accommodating space is defined between the air duct cover and the inner container of the deep cooling compartment 112, the heat exchanger 305 is disposed in the accommodating space, and the air flow channel extends substantially in the vertical direction, and the air flow flowing into the accommodating space from the air return opening passes through the heat exchanger 305 from bottom to top, so that a structure of air return from bottom to top is formed in the deep cooling compartment 112.

Referring to fig. 4 to 5, the stirling cooler 300 may include a casing, a cylinder, a piston, and a driving mechanism for driving the piston to move. The housing may be composed of a main body 301 and a cylindrical portion 302. The driving mechanism may be disposed within the body portion 301. The piston may be arranged to reciprocate within the cylindrical portion 302 to form a cold end of the stirling cooler 300 at the end of the cylindrical portion 302 and a hot end of the stirling cooler 300 at the junction of the cylindrical portion 302 and the body portion 301. With continued reference to fig. 4, a device chamber 102 is formed at the bottom of the rear side of the case 101. The embodiment of the utility model provides a refrigerator 100 still includes: the vapor compression refrigeration system is used for providing cold energy for at least one storage compartment and comprises a compressor 201, a condenser 202, an evaporator (not shown in the figure) and the like. The vapor compression refrigeration system may supply cooling only to the normal compartment 111, or may supply cooling to the normal compartment 111 and the cryogenic compartment 112. The Stirling refrigerator 300, the compressor 201 of the vapor compression refrigeration system and the condenser 202 are transversely arranged in the device chamber 102 at intervals, the Stirling refrigerator 300 is positioned behind the deep cooling chamber 112, and the cold end of the Stirling refrigerator is arranged upwards. By arranging the stirling cooler 300, the compressor 201, and the condenser 202 in the device chamber 102, the refrigerator 100 can be made reasonable and compact in component layout, and convenient to install and maintain. The lower portions of the two sidewalls of the device chamber 102 are respectively provided with ventilation openings 121 to facilitate airflow circulation. A heat radiation fan 204 may be further provided between the compressor 201 and the condenser 202 to further enhance heat radiation. The stirling cooler 300 may be secured within the device chamber 102 by springs, shock mounts, or the like.

The cold guide plate 351 of the heat exchanger 305 may be an integral structure itself, or may be a split structure such as that shown in fig. 2. The cold conducting plate 351 includes a first plate 3511 and a second plate 3512. The first adapter 360 includes a first holder 361 and a second holder 362. The front surface of the first plate 3511 extends forward to form a plurality of cooling fins 352, and the rear surface is provided with a first fixed seat 361. The second plate 3512 is provided with a preformed hole 355 at a position corresponding to the first fixing seat 361, so that the first fixing seat 361 passes through the preformed hole 355 and out of the cold guiding plate 351. The rear surface of the first fixing seat 361 is provided with a plurality of first pipe grooves 3610, and the front surface of the second fixing seat 362 is provided with a plurality of second pipe grooves 3620 corresponding to the plurality of first pipe grooves 3610. The ends of the cold-conducting heat pipes 332 are inserted into the holes defined by the first pipe groove 3610 and the second pipe groove 3620, and then the first fixing seat 361 and the second fixing seat 362 are fixed by the fixing member 363. The fixation 363 may be, for example, a screw. Meanwhile, a plurality of vertical pipe grooves (not numbered) are respectively formed on the rear surface of the first plate 3511 and the front surface of the second plate 3512. The vapor compression refrigeration system may also include evaporator tubes (not shown) that may be introduced into the tube slots of first plate 3511 and second plate 3512 to provide cooling to cryogenic compartment 112.

The stirling refrigeration system of refrigerator 100 of the embodiment of the present invention may further include a heat sink 304, wherein the heat sink 304 is thermally connected to the hot end of the stirling cooler 300. As shown in fig. 3 and 4, the heat sink 304 includes a hot side adapter 341, a heat conducting heat pipe 342, and heat dissipating fins 343. The hot end adapter 341 is fixedly thermally connected to the hot end of the stirling cooler 300. The first end of the heat conducting heat pipe 342 is fixedly and thermally connected to the hot end adapter 341, and the second end is fixedly and thermally connected to the heat dissipating fins 343. The embodiment of the utility model provides a refrigerator 100's heat abstractor 304 assembles easily, and the radiating effect is good, and the structure is firm.

Fig. 6 is an exploded schematic view of the double door 400 and the door frame 430 of the refrigerator 100 shown in fig. 3. Fig. 7 is a partially enlarged schematic view of fig. 6. In some embodiments, a double door 400 is provided at a front side of the deep cooling compartment 112 of the refrigerator 100 to enhance a heat-insulating effect of the refrigerator 100. The double door 400 includes an outer door body 401 and an inner door body 402; the inner door body 402 is positioned on the inner side of the outer door body 401, is arranged on the front side of the deep cooling chamber 112 and is used for opening and closing the deep cooling chamber 112; and the outer door body 401 and the inner door body 402 are provided independently of each other so that the inner door body 402 remains closed while the outer door body 401 is opened outward. The preservation temperature of the cryogenic compartment 112 is relatively low, when the cryogenic compartment 112 and the common compartment 111 share the same outer door body 401, the double-layer door 400 is arranged to include the outer door body 401 and the inner door body 402 which are independent of each other, the size of the outer door body 401 is larger than that of the inner door body 402, and the common compartment 111 is opened and closed by the outer door body 401, so that when a user takes and places articles from and in the common compartment 111, the inner door body 402 can be kept in a closed state under the condition that the outer door body 401 is opened, namely, the cryogenic compartment 112 is still sealed, and cold leakage can be effectively reduced. The distance between the inner door body 402 and the outer door body 401 is not more than 5 mm. The distance is too large, and the frosting risk is large. In addition, the outer surface of the inner door 402 may be provided with a heating wire, which may be intermittently turned on or turned on depending on conditions. Meanwhile, in order to ensure that the outer side of the inner door body 402 does not frost, a vacuum heat insulation board can be further arranged inside the inner door body 402, so that the temperature of the outer surface of the inner door body 402 is higher than 0 ℃. In order to overcome the negative pressure problem of the deep cooling compartment 112, a pressure balance hole may be further formed on the door seal of the inner door body 402 to ensure that the inner door body 402 can be opened smoothly.

The embodiment of the utility model provides a refrigerator 100 still includes: a door frame 430 and a mechanical locking mechanism. Door frame 430 is disposed at the front of tank 101 of deep cooling compartment 112. One end of the inner door 402 is connected to the cabinet 101, and the other end is detachably connected to the door frame 430 by a mechanical locking mechanism. By providing a separate door frame 430 in front of the tank 101 of the cryogenic compartment 112, the inner door 402 can be embedded within the tank 101. A seal strip is provided between the inner door body 402 and the door frame 430. Specifically, in order to ensure the sealing performance of the inner door body 402, a sealing strip is provided at the mating surface of the inner door body 402 and the door frame 430, and a sealing strip is also provided at the convex portion of the inner door body 402, i.e., a double door seal, which reduces the gap between the inner door body 402 and the door frame 430. Meanwhile, in order to prevent cold leakage, a seal may be provided between the upper portion of the inner door 402 and the general compartment 111.

In some embodiments, the inner door 402 and the chest 101 may be connected by at least two hinges 450. By connecting the inner door 402 to the box 101 with the hinge 450, the angle of the inner door 402 when opened can be ensured to reach 90 °. In the embodiment shown in FIG. 6, the inner door 402 is attached to the cabinet 101 by two hinges 450.

In some embodiments, the front end surface of the door frame 430 is formed with a locking groove 431. The mechanical locking mechanism comprises a first structural member 501, a second structural member 502, a third structural member 503 and a rotating rod 504, wherein a clamping joint 5121 is formed on a side end plate 512 of the first structural member 501, and the first structural member 501 is rotatably connected with the side end surface of the inner door body 402 through the third structural member 503 and the rotating rod 504; the second structural member 502 is connected to the door frame 430 and has a protrusion 521 extending to the slot 431. The inner door body 402 and the door frame 430 are hermetically fixed by moving the clamping head 5121 into the clamping groove 431 and fitting the bulge 521, and the inner door body 402 and the door frame 430 are separated by moving the clamping head 5121 out of the clamping groove 431. Through set up draw-in groove 431 on door frame 430, utilize the joint 5121 of mechanical locking mechanism to realize the fixed and separation of interior door body 402 and door frame 430, also realize closing and opening of interior door body 402, the structure is ingenious, conveniently controls. Referring to fig. 7, the first structure 501 includes a front end plate 511 and a side end plate 512, and a through hole matching with the first rod (not shown) of the rotating rod 504 is formed on the side end plate 512. The third structural member 503 includes a front end plate and a side end plate, the side end plate is fixed to the inner door 402 by two mounting holes and a fixing member 530, a through hole for the rotating rod 504 to pass through is also formed between the two mounting holes corresponding to the through hole of the first structural member 501, and the through hole of the third structural member 503 is matched with the second rod portion (not shown in the figure) of the rotating rod 504. And the outer diameter of the first rod part of the rotating rod 504 is larger than that of the second rod part, that is, the outer diameter of the contact area of the rotating rod 504 and the first structural member 501 is larger than that of the contact area of the rotating rod 504 and the third structural member 503, so that the first structural member 501 can be connected with the inner door body 402 and can rotate at the same time. In addition, in order to make the installation of the third structural member 503 and the inner door 402 more stable, a gasket may be provided under the side end plate of the third structural member 503. In the embodiment shown in fig. 7, the first structural member 501 rotates in the front-rear direction, the latch 5121 is formed to extend downward and rearward, and the second structural member 502 has a flat plate portion provided with a mounting hole and a protrusion 521 extending upward from the flat plate portion. It is understood that the first structural member 501 may also be rotated in the up-down direction, in which case the locking groove 431 may be opened in the left-right direction, and the protrusion 521 may extend leftwards or rightwards. In some embodiments, the front end surface of the inner door body 402 is formed with a recess 421; the front end plate 511 of the first structural member 501 extends into the recess 421, and the front side is provided with an indication plate 422. The front end plate 511 of the first structural member 501 is located in the concave portion 421, and can be used as a handle, so that the operation of a user is facilitated, the operation direction of the user can be reminded by arranging the indicating plate 422, and the use experience of the user is improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A heat exchanger, characterized by comprising:

a cold conducting plate;

the cooling guide plates are arranged on the front surface and/or the rear surface of the cooling guide plate at intervals, and an airflow channel is defined between the adjacent cooling guide fins positioned on the same side of the cooling guide plate; and

and the heating rod is configured to be fixedly inserted with the cold guide plate and/or the cold guide fins and used for providing heat required by defrosting of the heat exchanger.

2. The heat exchanger of claim 1,

the heating rod is configured to be fixedly inserted with the cold guide plate.

3. The heat exchanger of claim 2,

the cold guide plate is provided with fixing grooves along the front and back directions;

the heating rod is configured to be inserted into the fixing groove to realize the insertion and fixing with the cold guide plate.

4. The heat exchanger of claim 3,

the number of the fixed grooves is at least four, and the fixed grooves are evenly distributed on the cold guide plate;

the number of the heating rods is at least four, and the heating rods correspond to one fixing groove respectively.

5. The heat exchanger of claim 4,

the cold guide fins are formed by extending forwards from the front surface of the cold guide plate;

the front end of each heating rod is connected with a lead respectively, and the leads are gathered at the front side of the cold guide fins.

6. The heat exchanger of claim 3,

the heating rod is of a cylindrical structure;

the fixing groove is of a cylindrical structure, and the outer diameter of the heating rod is slightly larger than the inner diameter of the fixing groove.

7. The heat exchanger of claim 6,

the heating rod is a steel pipe, and the diameter of the heating rod is 5-10 mm.

8. The heat exchanger of claim 1,

the surface of the heating rod is coated with heat conducting grease.

9. A refrigerator having a heat exchanger according to any one of claims 1 to 8.

10. The refrigerator according to claim 9, comprising:

the refrigerator comprises a refrigerator body, a storage compartment and a storage box, wherein the refrigerator body is internally limited with the storage compartment;

the heat exchanger is arranged in at least one storage room, the cold guide fins extend forwards from the front surface of the cold guide plate, and the rear surface of the cold guide plate is provided with a first adapter;

the cold guide device comprises a second adapter and a cold guide heat pipe; and

and the second adapter is fixedly and thermally connected with the cold end of the Stirling refrigerator, one end of the cold guide heat pipe is fixedly and thermally connected with the second adapter, and the other end of the cold guide heat pipe is fixedly and thermally connected with the first adapter, so that the Stirling refrigerator is utilized to supply cold to the storage chamber.

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