CN214276193U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, include: the refrigerator comprises a box body, a first storage chamber and a second storage chamber are defined in the box body; a vapor compression refrigeration system including an evaporator; a Stirling refrigeration system configured to provide cold to the second storage compartment; and the air supply duct is configured to enable two ends of the air supply duct to be respectively connected with the first storage chamber and the second storage chamber, so that air flow after heat exchange of the evaporator can be conveyed to the second storage chamber through the air supply duct, and cold supply of the vapor compression refrigeration system to the second storage chamber is realized. The utility model discloses a refrigerator second storage room storage temperature broadens; the air supply duct with two ends respectively connected with the first storage chamber and the second storage chamber is used for realizing that the vapor compression refrigeration system provides cold energy for the second storage chamber, and the air supply duct is ingenious in structure and easy to set.

Description

Refrigerator with a door

Technical Field

The utility model relates to a refrigeration field especially relates to a 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 cryogenic compartment of the existing household refrigerator adopting Stirling refrigeration is only cooled by a Stirling refrigeration system, so that the preservation temperature of the compartment is generally between-14 ℃ and-80 ℃, and the compartment can only be used as frozen food materials.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can widen the refrigerator of the temperature of preserving of second storing compartment.

A further object of the utility model is to provide a refrigerator that usable stirling refrigerating system of second storing compartment and vapor compression refrigerating system refrigerate jointly and the structure is ingenious, set up easily.

Particularly, the utility model provides a refrigerator, include:

the refrigerator comprises a box body, a first storage chamber and a second storage chamber are defined in the box body;

the vapor compression refrigeration system comprises an evaporator, wherein the evaporator is arranged in the first storage room;

a Stirling refrigeration system configured to provide cold to the second storage compartment; and

and the air supply duct is configured to enable two ends of the air supply duct to be respectively connected with the first storage chamber and the second storage chamber, so that air flow subjected to heat exchange of the evaporator can be conveyed into the second storage chamber through the air supply duct, and cold supply to the second storage chamber by utilizing the vapor compression refrigeration system is realized.

Optionally, the stirling refrigeration system comprises a stirling cooler and a heat exchanger, the heat exchanger being thermally connected to the cold end of the stirling cooler; a first air duct cover plate is arranged on the inner side of the inner container of the first storage compartment, a first accommodating cavity is defined between the first air duct cover plate and the inner container of the first storage compartment, and the evaporator is arranged in the first accommodating cavity;

a second air duct cover plate is arranged on the inner side of the inner container of the second storage compartment, a second accommodating cavity is defined between the second air duct cover plate and the inner container of the second storage compartment, and the heat exchanger is arranged in the second accommodating cavity;

one end of the air supply duct is communicated with the first accommodating cavity, and the other end of the air supply duct is communicated with the second accommodating cavity.

Optionally, the first storage compartment and the second storage compartment are arranged in parallel along the transverse direction;

a first accommodating cavity is defined between the first air duct cover plate and the rear wall of the inner container of the first storage compartment;

a second containing cavity is defined between the second air duct cover plate and the rear wall of the inner container of the second storage compartment.

Optionally, a first air supply outlet is formed in the first air duct cover plate, and a first air supply fan is arranged at the first air supply outlet;

and a second air supply outlet is formed in the second air duct cover plate, and a second air supply fan is arranged at the second air supply outlet.

Optionally, the refrigerator further comprises: and the two ends of the return air duct are respectively communicated with the storage area and the first accommodating cavity of the second storage chamber, so that the airflow in the storage area of the second storage chamber flows back to the first accommodating cavity through the return air duct.

Optionally, the stirling cooler comprises a casing, a cylinder, a piston and a driving mechanism, the casing comprises a main body part and a cylindrical part, the piston is configured to reciprocate in the cylindrical part, so that a cold end of the stirling cooler is formed at the tail end of the cylindrical part, and a hot end of the stirling cooler is formed at the joint of the cylindrical part and the main body part; an opening is formed in the side wall of the main body portion, a heat radiation fan is arranged at the opening, and a fin radiator is further arranged on one side of the main body portion, where the cylindrical portion is arranged.

Optionally, the stirling refrigeration system further comprises a cold guide device, the cold guide device comprises a cold end adapter and a cold guide heat pipe, the cold end adapter is thermally connected with the cold end of the stirling refrigerator, one end of the cold guide heat pipe is thermally connected with the cold end adapter, and the other end of the cold guide heat pipe is thermally connected with the heat exchanger.

Optionally, a device chamber is defined at the bottom of the rear side of the box body;

the Stirling refrigerator, a compressor of the vapor compression refrigeration system and the condenser are sequentially arranged in the device chamber in the transverse direction, wherein the Stirling refrigerator is arranged corresponding to the second storage chamber;

the left side and the right side of the device chamber are provided with ventilation openings, and the heat dissipation fan is arranged right opposite to the ventilation openings adjacent to the heat dissipation fan.

Optionally, an air door is arranged in the air supply duct and used for controlling the flow of the air flow entering the second storage compartment and subjected to heat exchange through the evaporator.

Optionally, a double-layer door is arranged at the front side of the second storage chamber, the double-layer door comprises an outer door body and an inner door body which are arranged independently, and the inner door body is arranged at the front side of the second storage chamber;

a door frame is arranged at the front part of the box body of the second storage chamber, one end of the inner door body is connected with the box body, and the other end of the inner door body is separably connected with the door frame through a mechanical locking mechanism; wherein

The front end surface of the door frame is provided with a clamping groove; the mechanical locking mechanism comprises a first structural member, a second structural member, a third structural member and a rotary rod, a clamping joint is formed on a side end plate of the first structural member, and the first structural member is rotatably connected with the side end surface of the inner door body through the third structural member and the rotary rod; the second structural member is connected with the door frame and is provided with a protruding part extending to the clamping groove; the clamping head is moved into the clamping groove and matched with the protruding portion to realize the sealing fixation of the inner door body and the door frame, and the clamping head is moved out of the clamping groove to realize the separation of the inner door body and the door frame.

The refrigerator of the utility model can supply cold to the second storage chamber by arranging the Stirling refrigeration system and the vapor compression refrigeration system, so that the preservation temperature of the second storage chamber is widened, and the refrigerator can be used for refrigerating, freezing or freezing food materials at ultra-low temperature; the air supply duct with two ends respectively connected with the first storage chamber and the second storage chamber is used for realizing that the vapor compression refrigeration system provides cold energy for the second storage chamber, and the air supply duct is ingenious in structure and easy to set.

Further, the utility model discloses a refrigerator is through setting up side by side first storing compartment and second storing compartment and all setting up in wall department and holding the chamber behind being close to the inner bag for the setting in air supply wind channel is more convenient, can shorten the length in air supply wind channel simultaneously, and then can shorten the distance of first storing compartment to second storing compartment air supply, makes cold volume transmit to second storing compartment high-efficiently.

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 part of components of a refrigerator according to an embodiment of the present invention.

Fig. 2 is another perspective view of a part of components of the refrigerator shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of a portion of the components of the refrigerator shown in fig. 1.

Fig. 4 is another cross-sectional view of a part of components of the refrigerator along the line a-a in fig. 3.

Fig. 5 is a partially exploded view of a double door and a door frame of the refrigerator shown in fig. 1.

Fig. 6 is a partially enlarged schematic view of fig. 5.

Fig. 7 is a block diagram of a controller of the refrigerator shown in fig. 1.

Fig. 8 is a flowchart illustrating a control method of the refrigerator shown in fig. 1.

Fig. 9 is a flowchart illustrating a control method of the refrigerator shown in fig. 1.

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, and "left", "right" are directions as indicated in fig. 1.

Fig. 1 is a schematic perspective view of a part of components of a refrigerator 100 according to an embodiment of the present invention. Fig. 2 is another perspective view of a part of the components of the refrigerator 100 shown in fig. 1. Fig. 3 is a schematic cross-sectional view of a portion of the components of the refrigerator 100 shown in fig. 1. Fig. 4 is another schematic cross-sectional view of a portion of the components of the refrigerator 100 taken along line a-a of fig. 3. Fig. 5 is a partially exploded schematic view of the double door and the door frame of the refrigerator 100 shown in fig. 1. Fig. 6 is a partially enlarged schematic view of fig. 5. Fig. 7 is a block diagram of the controller of the refrigerator 100 shown in fig. 1. Fig. 8 is a flowchart illustrating a control method of the refrigerator 100 shown in fig. 1. Fig. 9 is a flowchart illustrating a control method of the refrigerator 100 shown in fig. 1.

The refrigerator 100 of the embodiment of the present invention may generally include: a cabinet 101, a vapor compression refrigeration system, a stirling refrigeration system, and a supply air duct 120. The cabinet 101 defines a first storage compartment 111 and a second storage compartment 112 therein. The vapor compression refrigeration system includes an evaporator 201, and the evaporator 201 is disposed in the first storage compartment 111. The stirling refrigeration system is configured to provide cooling to the second storage compartment 112. The two ends of the air supply duct 120 are respectively connected to the first storage compartment 111 and the second storage compartment 112, so that the air flow after heat exchange by the evaporator 201 can be conveyed into the second storage compartment 112 through the air supply duct 120, and cooling of the second storage compartment 112 by using the vapor compression refrigeration system is realized. Through setting up air supply duct 120, make the second storing compartment 112 of refrigerator 100 of the embodiment of the present invention can be cooled by one or two of stirling refrigerating system, vapor compression refrigerating system. That is to say, the second storage compartment 112 of the refrigerator 100 of the embodiment of the present invention has three refrigeration modes, the first mode is to refrigerate only by using the stirling refrigeration system, the second mode is to refrigerate only by using the vapor compression refrigeration system, the third mode is to refrigerate by using the stirling refrigeration system and the vapor compression refrigeration system at the same time, and the two refrigeration systems can complement each other. Therefore, the preservation temperature range of the second storage chamber 112 can be further widened, so that the preservation temperature of the second storage chamber 112 can be changed in a wide temperature range from 4 ℃ to-80 ℃, and three functions of refrigeration, freezing and ultralow temperature freezing can be realized.

The refrigerator 100 of the embodiment of the present invention can supply cold to the second storage compartment 112 by setting the stirling refrigeration system and the vapor compression refrigeration system, so that the preservation temperature of the second storage compartment 112 is widened, and the refrigerator can be used for refrigerating, freezing or ultra-low temperature freezing food materials; the air supply duct 120 with two ends respectively connected with the first storage chamber 111 and the second storage chamber 112 is used for realizing that the vapor compression refrigeration system provides cold energy for the second storage chamber 112, the structure is ingenious, the arrangement is easy, and meanwhile, because the evaporator 201 of the vapor compression refrigeration system is not arranged in the second storage chamber 112, the problem that the refrigerant of the vapor compression refrigeration system accumulates the evaporating pipe under the ultralow temperature environment is solved.

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 limits a storage chamber. The first storage compartment 111 may be one or more, and the second storage compartment 112 may be one or more. It will be appreciated that the first and second storage compartments 111, 112 are relative terms, and that the storage compartment in which the evaporator 201 is provided and in which refrigeration is provided by the vapour compression refrigeration system alone is referred to herein as the first storage compartment 111, and the storage compartment in which the evaporator 201 is not provided but in which refrigeration is provided by the vapour compression refrigeration system and the stirling refrigeration system is referred to herein as the second storage compartment 112, also referred to as the cryogenic compartment. One or more third storage compartments 113, which are defined as storage compartments not provided with the evaporator 201 and separately using the vapor compression refrigeration system to provide cold, may be further defined in the box body 101. As shown in fig. 1, the refrigerator 100 is a cross-door refrigerator, wherein the upper left side of the lower portion is a deep cooling compartment for the second storage compartment 112, the lower left side of the lower portion is a variable temperature compartment for the third storage compartment 113, and the right side of the lower portion is a freezing compartment for the first storage compartment 111. A second air supply duct 161 is arranged between the third storage compartment 113 and the first storage compartment 111 to supply cold energy to the third storage compartment 113 by using a vapor compression refrigeration system.

In some embodiments, a damper 123 is disposed in the air supply duct 120 to control the flow rate of the air flow entering the second storage compartment 112 after heat exchange by the evaporator 201. The damper 123 can be used for simply and effectively controlling the on-off of the refrigeration of the second storage compartment 112 by the vapor compression refrigeration system.

The stirling refrigerating system comprises a stirling refrigerating machine 300 and a heat exchanger 305, wherein the stirling refrigerating machine 300 is arranged outside the second storage chamber 112 and is thermally connected with the heat exchanger 305 arranged in the second storage chamber 112, so that the stirling refrigerating system is utilized to supply cold to the second storage chamber 112. As shown in fig. 3 and 4, in some embodiments, a first air duct cover plate 131 is disposed inside the inner container of the first storage compartment 111, a first accommodating cavity 141 is defined between the first air duct cover plate 131 and the inner container of the first storage compartment 111, and the evaporator 201 is disposed in the first accommodating cavity 141. A second air duct cover 132 is arranged on the inner side of the inner container of the second storage compartment 112, a second accommodating cavity 142 is defined between the second air duct cover 132 and the inner container of the second storage compartment 112, and the heat exchanger 305 is arranged in the second accommodating cavity 142. One end of the air supply duct 120 communicates with the first accommodating chamber 141, and the other end communicates with the second accommodating chamber 142. The inlet 121 and outlet 122 of the supply air duct 120 are shown in fig. 3 and 4. The two ends of the air supply duct 120 are respectively connected with the first accommodating cavity 141 and the second accommodating cavity 142, so that the vapor compression refrigeration system and the Stirling refrigeration system can supply cold to the second storage chamber 112 by sharing one set of air supply outlet 170, the structure is simplified, meanwhile, the cold air subjected to heat exchange by the vapor compression refrigeration system is premixed with the cold air subjected to heat exchange by the Stirling refrigeration system, and then flows out of the air supply outlet 170 of the second storage chamber 112, the temperature of the air flow flowing out of the air supply outlet 170 is kept basically stable, and the control of the temperature of the second storage chamber 112 and the storage of articles are facilitated.

In some preferred embodiments, the first storage compartment 111 and the second storage compartment 112 are juxtaposed in the transverse direction; a first accommodating cavity 141 is defined between the first air duct cover plate 131 and the inner container rear wall of the first storage compartment 111; a second accommodating cavity 142 is defined between the second air duct cover plate 132 and the rear wall of the inner container of the second storage compartment 112. The first storage chamber 111 and the second storage chamber 112 are arranged in parallel and are provided with accommodating cavities at the positions close to the rear wall of the inner container, so that the air supply duct 120 is more convenient to set, the length of the air supply duct 120 can be shortened, the distance of air supply from the first storage chamber 111 to the second storage chamber 112 can be shortened, and cold energy is efficiently transmitted to the second storage chamber 112. As shown in fig. 4, the inlet 121 of the air supply duct 120 is higher than the outlet 122, so that the air supply duct 120 is inclined as a whole, and the flow of cool air is facilitated. Meanwhile, as shown in fig. 2, a device chamber 102 is defined at the bottom of the rear side of the case 101. The Stirling refrigerator 300, the compressor 202 and the condenser 203 of the vapor compression refrigeration system are sequentially arranged in the device chamber 102 in the transverse direction, wherein the Stirling refrigerator 300 is arranged corresponding to the second storage compartment 112, the distance between the heat exchanger 305 and the Stirling refrigerator 300 and the distance between the evaporator 201 and the compressor 202 can be further shortened by arranging the first accommodating cavity 141 and the second accommodating cavity 142 close to the rear wall of the liner, and the cold transfer efficiency is further improved. In addition, a heat dissipation fan 204 may be disposed between the compressor 202 and the condenser 203 to facilitate airflow within the device compartment 102 to facilitate heat dissipation.

In some embodiments, the first air duct cover plate 131 is provided with a first air supply outlet, and the first air supply outlet is provided with a first air supply fan 151; a second air supply outlet is formed in the second air duct cover plate 132, and a second air supply fan 152 is arranged at the second air supply outlet. The first supply fan 151 may promote the flow of the air in the first accommodation chamber 141 to the outside, and the second supply fan 152 may promote the flow of the air in the second accommodation chamber 142 to the outside.

The embodiment of the utility model provides a refrigerator 100 still includes: and a return air duct 160 having both ends respectively communicating with the storage region of the second storage compartment 112 and the first receiving cavity 141, so that the air in the storage region of the second storage compartment 112 flows back into the first receiving cavity 141 through the return air duct 160. As shown in fig. 2 to 4, a second air return opening 172 is opened on a side wall of the second storage compartment 112 close to the first storage compartment 111, one end of the air return duct 160 is connected to the second air return opening 172, and the other end is connected to the first accommodating cavity 141. The return air duct 160 is also connected to the return air inlet of the third storage compartment 113, so that the air in the storage area of the third storage compartment 113 flows back into the first accommodating chamber 141 through the return air duct 160.

In some embodiments, the stirling cooler 300 of embodiments of the present invention comprises a housing 301, a cylinder, a piston and a driving mechanism, the housing 301 comprising a main portion 311 and a cylindrical portion 312, the piston being configured to reciprocate within the cylindrical portion 312 such that a cold end of the stirling cooler 300 is formed at the end of the cylindrical portion 312 and a hot end of the stirling cooler 300 is formed at the interface of the cylindrical portion 312 and the main portion 311; an opening is opened in a side wall of the main body portion 311, a heat radiation fan 313 is provided at the opening, and a fin heat sink 314 is further provided on the side of the main body portion 311 where the cylindrical portion 312 is provided. As shown in fig. 2, the device chamber 102 is provided with ventilation openings 103 on the left and right sides thereof, and the heat dissipation fan 313 is disposed to face the ventilation opening 103 adjacent thereto. The side wall of the main body part 311 is provided with the opening and the heat dissipation fan 313 is arranged, so that heat dissipation of the main body part 311 can be facilitated, the heat dissipation fan 313 is arranged right opposite to the ventilation opening 103 adjacent to the heat dissipation fan 313, the flowing of air flow can be promoted, and the heat dissipation efficiency is further improved; the fin radiator 314 is arranged at the joint of the main body part 311 and the cylindrical part 312, so that heat dissipation of the hot end of the Stirling refrigerator 300 can be facilitated, and meanwhile, the Stirling refrigerator is simple in structure and convenient to assemble. With continued reference to fig. 2, the disposition of the cold end of the stirling cooler 300 facing upward may shorten the distance between the stirling cooler 300 and the heat exchanger 305. The stirling cooler 300 may be secured within the device chamber 102 by springs, shock mounts, or the like.

The utility model discloses stirling refrigerating system still includes cold guiding device 303, and cold guiding device 303 includes cold junction adapter 331 and leads cold heat pipe 332, cold junction adapter 331 and stirling refrigerator 300's cold junction hot junction, leads cold heat pipe 332's one end and cold junction adapter 331 hot junction, the other end and heat exchanger 305 hot junction. In addition, a heat insulating member 307 is further provided at the cold end of the stirling cooler 300 and the cold conducting device 303 portion. As shown in fig. 3 and 4, the lower portion of the cold-end adapter 331 wraps the cold end of the stirling cooler 300. One end of the plurality of cold-guiding heat pipes 332 is inserted into the pipe hole of cold-end adapter 331, and the other end is inserted into heat exchanger 305. With continued reference to fig. 3 and 4, the heat exchanger 305 includes a cold plate 351 and a plurality of spaced apart cold guide fins 352, the plurality of cold guide fins 352 extending forwardly from a front surface of the cold plate 351, adjacent cold guide fins 352 defining air flow passages therebetween. The other end of one part of the heat conduction pipe 332 is inserted into the cold conduction plate 351, and the other end of the other part of the heat conduction pipe 332 is inserted into one or more cold conduction fins 352. The utility model discloses refrigerator 100 can realize the large tracts of land heat transfer through setting heat exchanger 305 to including leading cold drawing 351 and the cold fin 352 of leading that a plurality of intervals set up, improves heat exchange efficiency. As shown in fig. 3, the second duct cover 132 has an air supply opening 170 at an upper portion thereof, a first air return opening 171 at a lower portion thereof, and an air flow passage of the heat exchanger 305 extends substantially in the vertical direction, and an air flow flowing into the second accommodating chamber 142 from the first air return opening 171 passes through the heat exchanger 305 from the bottom to the top, thereby forming a structure of air flowing from the bottom to the top in the second storage compartment 112.

As shown in fig. 5 and 6, in some embodiments, a double door 400 is provided at a front side of the second storage compartment 112 of the refrigerator 100 to enhance a heat preservation 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 second storage compartment 112, and is used for opening and closing the second storage compartment 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. As shown in fig. 1 and 5, when the second storage compartment 112 and the third storage compartment 113 share the same outer door body 401, the double-layer door 400 is configured 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 third storage compartment 113 is opened and closed by the outer door body 401, so that when a user takes and places an article from and into the third storage compartment 113, the inner door body 402 can be kept in a closed state in a state where the outer door body 401 is opened, that is, the second storage 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 second storage compartment 112, a pressure balance hole may be further formed on the door seal of the inner door 402 to ensure that the inner door 402 can be smoothly opened.

The embodiment of the utility model provides a refrigerator 100 still includes: a door frame 430 and a mechanical locking mechanism. The door frame 430 is disposed at the front of the cabinet 101 of the second storage 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. The inner door 402 can be embedded in the box 101 by providing the separate door frame 430 at the front of the box 101 of the second storage compartment 112. 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 sealing strip may be disposed between the inner door 402 and the third storage compartment 113. 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. 5, 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. 6, 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. 6, 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.

The utility model discloses refrigerator can adopt the control method of current refrigerator to control. Referring to fig. 7 to 9, a preferred control method portion of the refrigerator 100 according to an embodiment of the present invention will be described in detail. As shown in fig. 7, the controller 600 of the refrigerator 100 according to an embodiment of the present invention may include a processor 601 and a memory 602. Wherein the memory 602 stores a computer program 620, and the computer program 620 is used for implementing the control method of the refrigerator 100 according to the embodiment of the present invention when being executed by the processor 601.

In some embodiments, the refrigerator 100 of the present invention is further configured to: when the compartment temperature of the second storage compartment 112 is greater than or equal to the first preset temperature threshold, the damper 123 is opened, and the stirling refrigerator 300 stops operating, so that the vapor compression refrigeration system is independently utilized to supply cold to the second storage compartment 112; when the compartment temperature of the second storage compartment 112 is less than the first preset temperature threshold, the damper 123 is closed, and the stirling refrigerator 300 operates, so that the stirling refrigeration system is independently utilized to supply cold to the second storage compartment 112. The utility model discloses refrigerator 100 is through being provided with air door 123 in air supply duct 120, and configure into vapor compression refrigerating system when room temperature more than or equal to first predetermined temperature threshold value between second storing room 112 and supply cold to second storing room 112 alone, switch over to stirling refrigerating system when room temperature between second storing room 112 is less than first predetermined temperature threshold value and supply cold to second storing room 112 alone, not only improved the refrigeration efficiency to second storing room 112 on the whole, refrigerator 100's energy consumption has still been reduced, the life of stirling refrigerator 300 has been prolonged. The first predetermined temperature threshold may be greater than a minimum refrigeration temperature of the vapor compression refrigeration system, for example, the minimum refrigeration temperature of the vapor compression refrigeration system is-40 deg.c and the first predetermined temperature threshold may be-25 deg.c.

Referring to fig. 8, a control method of a refrigerator 100 according to an embodiment of the present invention includes the following steps:

s102: acquiring the compartment temperature of the second storage compartment 112;

s104: judging whether the compartment temperature of the second storage compartment 112 is greater than or equal to a first preset temperature threshold value;

s106: if the judgment result in the step S104 is yes, the damper 123 is controlled to be opened, the stirling refrigerator 300 stops operating, and the vapor compression refrigeration system is solely utilized to supply cold to the second storage compartment 112;

s108: if the judgment result in the step S104 is negative, the damper 123 is controlled to be closed, and the stirling cooler 300 is controlled to operate, so that the stirling cooling system is solely utilized to supply cold to the second storage compartment 112.

The utility model discloses refrigerator 100 can obtain the room temperature of a plurality of second storing rooms 112 by the interval to carry out the judgement of step S104 respectively, select the refrigeration mode according to the newest judged result after the judgement at every turn, realize the matching of refrigerating system and room temperature, and then effectively reduce the energy consumption.

In some embodiments, the refrigerator 100 of the present invention is further configured to: when the operation quick-freezing mode is satisfied, the damper 123 is opened, and the stirling cooler 300 is operated to simultaneously cool the second storage compartment 112 using the vapor compression cooling system and the stirling cooling system. The utility model discloses refrigerator 100 makes vapor compression refrigerating system and stirling refrigerating system be second storing compartment 112 cold supply simultaneously through setting to when satisfying operation quick-freeze mode, and refrigeration efficiency is high, can freeze the edible material in second storing compartment 112 fast to user's desired target temperature, has improved user experience.

The conditions for operating the quick-freeze mode include: receiving a quick-freezing mode opening instruction; and/or when the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold and the compartment temperature of the second storage compartment 112 is still greater than the target temperature of the second storage compartment 112 after the preset cooling time period.

The user may enter the quick-freeze mode by inputting a command to turn on the quick-freeze mode through a touch input or a voice input.

Because the utility model discloses refrigerator 100's second storing compartment 112 can carry out the temperature setting of preserving of broad width, and the mode of just refrigerating usually adopts vapor compression refrigerating system to supply cold or adopt stirling refrigerating system to second storing compartment 112 cooling alone to second storing compartment 112 alone, has the problem that second storing compartment 112 cooling rate is too slow. It may be the case that the compartment temperature of the second storage compartment 112 is still greater than the target temperature of the second storage compartment 112 after a period of refrigeration. Therefore, the embodiment of the present invention provides a refrigerator 100, which is configured to forcibly operate the quick-freezing mode under the situation that the temperature of the second storage chamber 112 is still greater than the target temperature of the second storage chamber 112 after the target temperature of the second storage chamber 112 is less than or equal to the second preset temperature threshold and the preset cooling time period, thereby effectively increasing the cooling speed of the second storage chamber 112. The target temperature of the second storage compartment 112 may be a preservation temperature entered by a user or an appropriate preservation temperature for the item currently stored by default in the system.

In particular, when the vapor compression refrigeration system is solely used to supply cold to the second storage compartment 112, it is determined whether the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold and whether the compartment temperature of the second storage compartment 112 is still greater than the target temperature of the second storage compartment 112 after a preset time period of refrigeration. This is because, compared to the case where the vapor compression refrigeration system alone is used to supply cold to the second storage compartment 112, the cooling rate is more likely to be too slow in the case where the vapor compression refrigeration system alone is used to supply cold to the second storage compartment 112, that is, the control of the forced quick-freeze mode is added to the cooling mode operation in which the vapor compression refrigeration system alone is used to supply cold to the second storage compartment 112. The second predetermined temperature threshold is generally greater than the first predetermined temperature threshold. As exemplified above, the first predetermined temperature threshold may be-25 deg.C and the second predetermined temperature threshold may be-20 deg.C. The preset time period is preferably a period of time, but not too long, for cooling the second storage compartment 112 by using the current cooling mode, and may be 20min to 2h, for example, 20min, 35min, 1.5h, and the like.

Referring to fig. 9, a control method of a refrigerator 100 according to an embodiment of the present invention includes the following steps:

s202: the refrigerator 100 is in a refrigeration mode in which the vapor compression refrigeration system alone supplies cold to the second storage compartment 112;

s204: judging whether the target temperature of the second storage compartment 112 is less than or equal to a second preset temperature threshold value;

if the determination result in step S204 is negative, step S202 is performed, and refrigerator 100 maintains the current cooling mode.

S206: if the judgment result in the step S204 is yes, continuing to operate the current refrigeration mode for a preset time period;

s208: after step S206 is completed, determining whether the compartment temperature of the second storage compartment 112 is greater than the target temperature of the second storage compartment 112;

if the determination result in step S208 is negative, step S202 is performed, and refrigerator 100 maintains the current cooling mode.

S210: if the determination result in the step S208 is yes, the quick-freezing mode is operated, the damper 123 is controlled to be opened, the stirling refrigerator 300 is controlled to operate, and the vapor compression refrigeration system and the stirling refrigeration system are used for supplying cold to the second storage compartment 112.

Furthermore, the control method of the refrigerator 100 according to the embodiment of the present invention further includes: s212: receiving a quick-freezing mode opening instruction; step S210 is then executed.

For example, assume that the target temperature of the second storage compartment 112 is-35 ℃, the first preset temperature threshold is-25 ℃, the second preset temperature threshold is-20 ℃, and the preset time period is 1 hour. Assuming that the initially acquired compartment temperature of the second storage compartment 112 (referred to as the first compartment temperature for short) is-10 ℃, since the first compartment temperature of-10 ℃ is greater than a first preset temperature threshold of-25 ℃, the control damper 123 is opened, the stirling refrigerator 300 stops operating, and the vapor compression refrigeration system is solely utilized to cool the second storage compartment 112. The target temperature-35 ℃ of the second storage compartment 112 is less than the second preset temperature threshold-20 ℃. Assuming that after the refrigeration is continued for 1 hour, the room temperature of the second storage room 112 (referred to as the second room temperature for short) obtained again is-22 ℃, the second room temperature of-22 ℃ is higher than the target temperature of-35 ℃ of the second storage room 112, at this time, the quick-freezing mode is forcibly operated, the air door 123 is controlled to be opened, the stirling refrigerator 300 is controlled to operate, and meanwhile, the vapor compression refrigeration system and the stirling refrigeration system are used for supplying cold to the second storage room 112 until the room temperature of the second storage room 112 is less than or equal to-35 ℃.

In some embodiments, the refrigerator 100 of the present invention is further configured to: in the quick-freezing mode, the duty ratio (i.e., the ratio of the operating speed to the rated speed) of the first supply fan 151 is 100%, and the duty ratio of the second supply fan 152 is 100%. By controlling the first air supply fan 151 and the second air supply fan 152 to work at a duty ratio of 100%, the overall refrigeration efficiency can be further improved, and the reduction of the service life of the first air supply fan 151 and the second air supply fan 152 due to too concentrated cold energy can be avoided.

In some embodiments, the refrigerator 100 of the present invention, when operating in the quick-freeze mode, is further configured to: when the target temperature of the second storage compartment 112 is greater than or equal to the first preset temperature threshold, the operating power of the stirling cooler 300 is 50% of the rated power; when the target temperature of the second storage compartment 112 is less than the first preset temperature threshold, the operating power of the stirling cooler 300 is 100% of the rated power. By controlling the operating power of the stirling cooler 300 in the quick-freeze mode in different situations, the refrigeration efficiency is ensured, and at the same time, the energy consumption is reduced as much as possible, and the energy is saved.

In some embodiments, the refrigerator 100 of the present invention, when operating in the quick-freeze mode, is further configured to: when the target temperature of the second storage compartment 112 is less than the first preset temperature threshold and the compartment temperature of the second storage compartment 112 is greater than the compartment temperature of the first storage compartment 111, the operating speed of the compressor 202 of the vapor compression refrigeration system is the highest speed until the compartment temperature of the second storage compartment 112 is less than or equal to the compartment temperature of the first storage compartment 111. By controlling the compressor 202 to operate at the highest rotation speed under the condition that the target temperature of the second storage compartment 112 is less than the first preset temperature threshold and the compartment temperature of the second storage compartment 112 is greater than the compartment temperature of the first storage compartment 111, the overall refrigeration efficiency of the refrigerator 100 can be improved, and meanwhile, after the compartment temperature of the second storage compartment 112 is less than or equal to the compartment temperature of the first storage compartment 111, the compressor 202 is controlled not to maintain the highest rotation speed any more, so that the problem that the service life of the compressor 202 is reduced due to the fact that the heat dissipation pressure is large due to the fact that the highest rotation speed is maintained can be avoided.

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 refrigerator characterized by comprising:

the refrigerator comprises a box body, a first storage chamber and a second storage chamber are defined in the box body;

the vapor compression refrigeration system comprises an evaporator, and the evaporator is arranged in the first storage room;

a Stirling refrigeration system configured to provide cold to the second storage compartment; and

and the two ends of the air supply duct are respectively connected with the first storage chamber and the second storage chamber, so that air flow after heat exchange of the evaporator can be conveyed to the second storage chamber through the air supply duct, and the cooling of the second storage chamber by the vapor compression refrigeration system is realized.

2. The refrigerator according to claim 1,

the Stirling refrigeration system comprises a Stirling refrigerator and a heat exchanger, and the heat exchanger is thermally connected with the cold end of the Stirling refrigerator; and is

A first air duct cover plate is arranged on the inner side of the inner container of the first storage compartment, a first accommodating cavity is defined between the first air duct cover plate and the inner container of the first storage compartment, and the evaporator is arranged in the first accommodating cavity;

a second air duct cover plate is arranged on the inner side of the inner container of the second storage room, a second accommodating cavity is defined between the second air duct cover plate and the inner container of the second storage room, and the heat exchanger is arranged in the second accommodating cavity;

one end of the air supply duct is communicated with the first accommodating cavity, and the other end of the air supply duct is communicated with the second accommodating cavity.

3. The refrigerator according to claim 2,

the first storage chamber and the second storage chamber are arranged in parallel along the transverse direction;

a first accommodating cavity is defined between the first air duct cover plate and the rear wall of the inner container of the first storage compartment;

and a second accommodating cavity is defined between the second air duct cover plate and the rear wall of the inner container of the second storage compartment.

4. The refrigerator according to claim 2,

a first air supply outlet is formed in the first air duct cover plate, and a first air supply fan is arranged at the first air supply outlet;

and a second air supply outlet is formed in the second air duct cover plate, and a second air supply fan is arranged at the second air supply outlet.

5. The refrigerator of claim 2, further comprising:

and the two ends of the return air duct are respectively communicated with the storage area of the second storage compartment and the first accommodating cavity, so that the airflow in the storage area of the second storage compartment flows back into the first accommodating cavity through the return air duct.

6. The refrigerator according to claim 2,

the Stirling refrigerator comprises a casing, a cylinder, a piston and a driving mechanism, wherein the casing comprises a main body part and a cylindrical part, the piston is configured to reciprocate in the cylindrical part, so that a cold end of the Stirling refrigerator is formed at the tail end of the cylindrical part, and a hot end of the Stirling refrigerator is formed at the joint of the cylindrical part and the main body part; an opening is formed in the side wall of the main body portion, a heat radiation fan is arranged at the opening, and a fin radiator is further arranged on the side, provided with the cylindrical portion, of the main body portion.

7. The refrigerator according to claim 6,

the Stirling refrigerating system further comprises a cold guide device, wherein the cold guide device comprises a cold end adapter and a cold guide heat pipe, the cold end adapter is thermally connected with the cold end of the Stirling refrigerating machine, one end of the cold guide heat pipe is thermally connected with the cold end adapter, and the other end of the cold guide heat pipe is thermally connected with the heat exchanger.

8. The refrigerator according to claim 6,

a device chamber is defined at the bottom of the rear side of the box body;

the Stirling refrigerator, the compressor of the vapor compression refrigeration system and the condenser are sequentially arranged in the device chamber in the transverse direction, wherein the Stirling refrigerator is arranged corresponding to the second storage chamber;

the left side and the right side of the device chamber are provided with ventilation openings, and the heat dissipation fan is over against the ventilation openings adjacent to the heat dissipation fan.

9. The refrigerator according to claim 1,

and an air door is arranged in the air supply duct and used for controlling the flow of the air flow entering the second storage chamber and subjected to heat exchange through the evaporator.

10. The refrigerator according to claim 1,

a double-layer door is arranged on the front side of the second storage chamber and comprises an outer door body and an inner door body which are arranged independently, wherein the inner door body is arranged on the front side of the second storage chamber;

a door frame is arranged at the front part of the box body of the second storage compartment, one end of the inner door body is connected with the box body, and the other end of the inner door body is detachably connected with the door frame through a mechanical locking mechanism; wherein

The front end face of the door frame is provided with a clamping groove; the mechanical locking mechanism comprises a first structural member, a second structural member, a third structural member and a rotary rod, wherein a clamping joint is formed on a side end plate of the first structural member, and the first structural member is rotatably connected with the side end surface of the inner door body through the third structural member and the rotary rod; the second structural part is connected with the door frame and is provided with a protruding part extending to the clamping groove; the clamping head is moved into the clamping groove and matched with the protruding portion to achieve sealing and fixing of the inner door body and the door frame, and the clamping head is moved out of the clamping groove to achieve separation of the inner door body and the door frame.

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