CN114636271A - Refrigerator with a door - Google Patents

Abstract

The present invention provides a refrigerator, including: the refrigerator comprises a box body, a door and a refrigerator body, wherein at least one storage chamber is defined in the box body, and the at least one storage chamber comprises a deep cooling chamber; the vapor compression refrigeration system is configured to provide cold energy for at least one storage compartment and is provided with a first evaporation pipe; and the Stirling refrigerating system is configured to provide cold for the cryogenic chamber and comprises a Stirling refrigerating machine, wherein the hot end of the Stirling refrigerating machine is configured to be thermally connected with the first evaporation pipe so as to realize cooling and heat dissipation by utilizing the cold of the first evaporation pipe. The refrigerator can utilize the cold energy of the first evaporation tube to cool and radiate the hot end, thereby improving the heat radiation effect of the Stirling refrigerator, reducing the failure rate of the Stirling refrigerator and prolonging the service life of the Stirling refrigerator.

Description

Refrigerator

Technical Field

The invention relates to the field of refrigeration, in particular 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 existing household refrigerator adopting Stirling refrigeration has the defects that the Stirling refrigerator has poor heat dissipation, so that the Stirling refrigerator has high failure rate and the service life is influenced.

Disclosure of Invention

The invention aims to provide a refrigerator with a good heat dissipation effect of a Stirling refrigerator.

A further object of the present invention is to provide a refrigerator which is less energy consuming and more energy efficient.

In particular, the present invention provides a refrigerator including:

the refrigerator comprises a box body, a door and a refrigerator body, wherein at least one storage chamber is defined in the box body, and the at least one storage chamber comprises a deep cooling chamber;

the vapor compression refrigeration system is configured to provide cold energy for at least one storage chamber and is provided with a first evaporation pipe; and

the Stirling refrigerating system is configured to provide cold for the deep cooling chamber and comprises a Stirling refrigerating machine, wherein the hot end of the Stirling refrigerating machine is configured to be in thermal connection with the first evaporation pipe, so that cooling and heat dissipation are achieved by using the cold of the first evaporation pipe.

Optionally, the stirling refrigeration system further comprises: the first adapter is sleeved outside the hot end and is fixedly and thermally connected with the hot end, wherein a plurality of fixing holes are formed in the first adapter, and the first evaporation tube bends and extends in the fixing holes in a roundabout mode.

Optionally, a device chamber is formed 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 transversely arranged in the device chamber at intervals, the stirling refrigerator is positioned behind the cryogenic chamber, and the cold end of the stirling refrigerator is arranged upwards;

a plurality of fixing holes along the left and right direction are formed in the first adapter, the inlet side and the outlet side of the first evaporation pipe are located on one side, close to the compressor, of the first adapter, and heat preservation pieces are arranged outside the first adapter and outside a section, located in the device chamber, of the first evaporation pipe.

Optionally, the refrigerant temperature of the first evaporation tube is-10 ℃ to 0 ℃.

Optionally, the vapor compression refrigeration system comprises a compressor, a condenser, a drying filter, an electromagnetic valve, a first evaporation tube and an air return tube which are connected in series in sequence; or

The vapor compression refrigeration system comprises a compressor, a condenser, a drying filter, an electromagnetic valve, a second evaporation pipe, a refrigeration evaporator and an air return pipe which are sequentially connected in series; the at least one storage chamber also comprises a freezing chamber, and the freezing evaporator is arranged in the freezing chamber to provide cold energy for the freezing chamber; the inlet side of the first evaporating pipe is connected with the electromagnetic valve, and the outlet side of the first evaporating pipe is connected with the inlet side of the refrigeration evaporator.

Optionally, the solenoid valve is configured to: when the Stirling refrigerator operates, the first evaporation tube is conducted so as to dissipate heat from the hot end.

Optionally, the inlet side of the first evaporation pipe is connected with the electromagnetic valve, and the outlet side of the first evaporation pipe is connected with the inlet side of the refrigeration evaporator;

the solenoid valve is configured to: when the Stirling refrigerator operates, the first evaporation tube is conducted, and the second evaporation tube is disconnected, so that heat is dissipated to the hot end, and cooling is assisted to the freezing chamber.

Optionally, a first capillary tube is arranged between the first evaporation tube and the electromagnetic valve;

a second capillary tube is arranged between the first evaporation tube and the freezing evaporator.

Optionally, the vapor compression refrigeration system further comprises a third evaporation pipe arranged in the cryogenic compartment to realize that the vapor compression refrigeration system is used for providing cold energy for the cryogenic compartment; wherein

The refrigerator is further configured to: when the temperature of the compartment of the cryogenic compartment is greater than or equal to a preset temperature threshold value, the third evaporation tube and the Stirling refrigerator are conducted to be out of operation, so that the vapor compression refrigeration system is independently utilized to supply cold for the cryogenic compartment; and when the temperature of the compartment of the cryogenic compartment is less than the preset temperature threshold, the third evaporation pipe and the Stirling refrigerator are disconnected to operate, so that the Stirling refrigeration system is independently utilized to supply cold for the cryogenic compartment.

Optionally, the refrigerator is further configured to: the first working rotating speed of the compressor of the vapor compression refrigeration system is not lower than the second working rotating speed of the compressor when the Stirling refrigerator does not operate, and the higher the power when the Stirling refrigerator operates is, the larger the value of the first working rotating speed which is adjusted up relative to the second working rotating speed is.

The vapor compression refrigeration system of the refrigerator is provided with the first evaporation pipe, and the hot end of the Stirling refrigerator of the Stirling refrigeration system is thermally connected with the first evaporation pipe, so that the cold energy of the first evaporation pipe can be utilized to cool and radiate the hot end of the Stirling refrigerator, the heat radiation effect of the Stirling refrigerator is improved, the failure rate of the Stirling refrigerator is reduced, and the service life of the Stirling refrigerator can be prolonged.

Furthermore, the Stirling refrigerating system of the refrigerator further comprises a first adapter, the first adapter is sleeved outside the hot end of the Stirling refrigerator to achieve sufficient and stable thermal connection between the first adapter and the hot end of the Stirling refrigerator, and the first evaporation tube is bent and extended to penetrate through the fixing holes by forming the fixing holes in the first adapter, so that the length of the first evaporation tube at the first adapter is as long as possible, the heat dissipation efficiency is further improved, and the heat dissipation effect is enhanced.

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 invention will be described in detail hereinafter, by way of illustration and not 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 to scale. In the drawings:

fig. 1 is a perspective view of a part of components of a refrigerator according to one embodiment of the present invention.

Fig. 2 is a rear view schematically showing part of components of the refrigerator shown in fig. 1.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a perspective view of the stirling refrigerating system and the first evaporating tube of the refrigerator shown in fig. 1.

Fig. 5 is a block diagram of the components of an embodiment of the vapor compression refrigeration system of the refrigerator shown in fig. 1.

Fig. 6 is a block diagram of another embodiment of a vapor compression refrigeration system of the refrigerator shown in fig. 1.

Fig. 7 is an exploded schematic view of a double door and a door frame of the refrigerator shown in fig. 1.

Fig. 8 is a partially enlarged schematic view of fig. 7.

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. 1.

Fig. 1 is a perspective view of a portion of components of a refrigerator 100 according to an embodiment of the present invention. Fig. 2 is a rear view of a portion of the components of the refrigerator 100 shown in fig. 1. Fig. 3 is a partially enlarged schematic view of fig. 2. Fig. 4 is a perspective view of the stirling refrigerating system and the first evaporation pipe 251 of the refrigerator 100 shown in fig. 1. Fig. 5 is a block diagram of the components of an embodiment of the vapor compression refrigeration system of the refrigerator 100 shown in fig. 1. Fig. 6 is a block diagram of another embodiment of the vapor compression refrigeration system 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, 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 vapor compression refrigeration system is configured to provide refrigeration to at least one storage compartment and has a first evaporator tube 251. The stirling refrigeration system is configured to provide refrigeration to cryogenic compartment 112. The stirling refrigeration system includes a stirling cooler 300. The hot end of the stirling cooler 300 is configured to be thermally connected to the first evaporation tube 251 so as to use the cold energy of the first evaporation tube 251 to achieve cooling and heat dissipation. Because the efficiency of the vapor compression refrigeration system is far higher than that of the Stirling refrigeration system when the evaporation temperature is not too low (> -40 ℃), the vapor compression refrigeration system is considered to be adopted to radiate heat to the hot end of the Stirling refrigerator 300, so that the comprehensive radiating efficiency (particularly when the ambient temperature is high) can be obviously higher than that of the conventional Stirling refrigerator 300 by adopting a wind circulation radiating mode. According to the refrigerator 100 provided by the embodiment of the invention, the vapor compression refrigeration system is provided with the first evaporation pipe 251, and the hot end of the Stirling refrigerator 300 of the Stirling refrigeration system is thermally connected with the first evaporation pipe 251, so that the cold energy of the first evaporation pipe 251 can be utilized to cool and radiate the hot end of the Stirling refrigerator 300, the heat radiation effect of the Stirling refrigerator 300 is improved, the failure rate of the Stirling refrigerator 300 is reduced, and the service life of the Stirling refrigerator 300 can be prolonged.

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 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-ultra-low temperature compartments, which do not use the stirling refrigeration system for cooling, except for the deep cooling compartment 112, and cannot realize ultra-low temperatures, such as the refrigerating compartment 122, the freezing compartment 111, and the variable temperature compartment 123, which are respectively defined by the refrigerating liner, the freezing liner, and the variable temperature liner. The storage temperature of the cold storage chamber 122 can be generally 2 ℃ to 9 ℃, and the storage temperature of the freezing chamber 111 can be generally-20 ℃ to-16 ℃. The variable temperature chamber 123 can be used as the refrigerating chamber 122 or the freezing chamber 111 by adjusting according to the demand. Cryogenic compartment 112 refers to a compartment that is cooled using at least a stirling refrigeration system. In the embodiment shown in fig. 1, the refrigerator 100 is a cross-door refrigerator, and the storage compartments include a refrigerating compartment 122 located at the upper portion, a freezing compartment 111 located at the right side of the lower portion, a temperature-changing compartment 123 located above the left side of the lower portion, and a deep-cooling compartment 112 located below the left side of the lower portion.

Referring to fig. 2 to 4, the stirling cooler 300 may include a casing, a cylinder (not shown), a piston (not shown), and a driving mechanism (not shown) for driving the piston to move. The housing may be composed of a main body 301 and a cylindrical portion 302. The drive 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 an end of the cylindrical portion 302 remote from the main body portion 301 and a hot end of the stirling cooler 300 at an end of the cylindrical portion 302 adjacent the main body portion 301.

The vapor compression refrigeration system generally further includes a compressor 201, a condenser 202, and the like. As shown in fig. 2 and 3, the device chamber 102 is formed at the bottom of the rear side of the casing 101, the stirling cooler 300, the compressor 201, and the condenser 202 are laterally disposed in the device chamber 102 at intervals, and the stirling cooler 300 is disposed behind the cryogenic chamber 112 with its cold end disposed upward. 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 parts of the two side walls of the device chamber 102 are respectively provided with ventilation openings to facilitate airflow circulation. A heat radiation fan 203 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.

In some embodiments, the stirling refrigeration system of the refrigerator 100 of embodiments of the present invention further comprises: the first adapter 341 is sleeved outside the hot end of the stirling cooler 300 and is fixedly and thermally connected with the hot end, wherein a plurality of fixing holes are formed in the first adapter 341, and the first evaporation tube 251 is bent and extended to penetrate through the plurality of fixing holes. The stirling refrigerating system of the refrigerator 100 according to the embodiment of the present invention further includes the first adapter 341, the first adapter 341 is sleeved outside the hot end of the stirling refrigerator 300, so that the first adapter 341 and the hot end can be sufficiently and stably thermally connected, and as shown in fig. 4, the first evaporation tube 251 is bent and extended to pass through the plurality of fixing holes by forming the plurality of fixing holes on the first adapter 341, so that the first evaporation tube 251 at the first adapter 341 is as long as possible, the heat dissipation efficiency is improved, and the heat dissipation effect is further enhanced.

In some embodiments, the first adapter 341 is opened with a plurality of fixing holes along the left-right direction, the inlet side and the outlet side of the first evaporation tube 251 are both at one side of the first adapter 341 close to the compressor 201, and the exterior of the first adapter 341, the exterior of the section of the first evaporation tube 251 located in the device chamber 102 are both provided with heat insulation members. By arranging the inlet side and the outlet side of the first evaporation pipe 251 at one side of the first adapter 341 close to the compressor 201, the distance between the first evaporation pipe 251 and the compressor 201 and the distance between the first evaporation pipe 251 and the condenser 202 can be shortened, the cold transfer distance is shortened, and the heat dissipation effect is further enhanced; by providing the thermal insulator outside the first adapter 341 and outside the section of the first evaporating tube 251 located in the device chamber 102, the loss of cooling energy can be reduced. As shown in fig. 4, a first insulating member 361 having a square shape is provided outside the first adapter 341, and second insulating members 362 having a cylindrical shape are provided outside the two sections of the first evaporating pipe 251 located in the device chamber 102, respectively. The first insulating member 361 and the second insulating member 362 may be insulating cotton having a thickness of not less than 20 mm.

In some embodiments, the refrigerant temperature of the first evaporation tube 251 is-10 deg.C to 0 deg.C. Controlling the refrigerant temperature of the first evaporation tube 251 to-10 deg.c to 0 deg.c makes the heat insulating requirement of the heat insulating part not high, and makes the heat insulating part easy to configure and low in cost, and the vapor compression refrigerating system has high efficiency.

The vapor compression refrigeration system may provide cooling to only the common compartment or to both the common compartment and the cryogenic compartment 112. In the refrigerator 100 of the embodiment of the present invention, the vapor compression refrigeration system supplies cold to the normal compartment and the deep cooling compartment 112. Taking the refrigerator 100 shown in fig. 1 as an example, the vapor compression refrigeration system mainly includes: compressor 201, condenser 202, dry filter 209, electromagnetic valve 208, freezing evaporator 204, refrigerating evaporator 205, first evaporating pipe 251, second evaporating pipe 252, third evaporating pipe 253, air return pipe 210, and the like. The solenoid valve 208 has a one-in-four-out configuration. The connection of the components of the vapor compression refrigeration system is shown in fig. 5 and 6.

The first evaporating tubes 251 are arranged in two ways. In the embodiment shown in fig. 5, the inlet side of the first evaporation tube 251 is connected to the first outlet of the solenoid valve 208, and the outlet side is connected to the inlet side of the muffler 210; in the embodiment shown in fig. 6, the inlet side of the first evaporating pipe 251 is connected to the first outlet of the solenoid valve 208, and the outlet side is connected to the inlet side of the freezing evaporator 204. The freezing evaporator 204 is disposed in the freezing compartment 111 to provide cooling energy to the freezing compartment 111, wherein an inlet side of the freezing evaporator 204 is connected to a second outlet of the electromagnetic valve 208 via a second evaporation pipe 252, and an outlet side is connected to an inlet side of the air return pipe 210. A refrigerating evaporator 205 is arranged in the refrigerating compartment 122 to provide refrigerating capacity to the refrigerating compartment 122, wherein the inlet side of the refrigerating evaporator 205 is connected to the third outlet of the solenoid valve 208 and the outlet side is connected to the inlet side of the freezing evaporator 204. Referring to fig. 2, the variable temperature compartment 123 may be cooled by providing a supply air duct 261 and a return air duct 262 with respect to the freezing compartment 111. Third evaporation pipe 253 is arranged in deep cooling compartment 112 to supply cold energy to deep cooling compartment 112 by using a vapor compression refrigeration system, and the inlet side of third evaporation pipe 253 is connected with the fourth outlet of solenoid valve 208, and the outlet side is connected with the inlet side of freezing evaporator 204.

The outlet side of the first evaporation tube 251 is directly connected with the return air tube 210, so that a better heat dissipation effect can be provided, and the heat-dissipating device is suitable for the situation that the heat generated by the hot end of the Stirling refrigerator 300 is large. And it is preferable to connect the outlet side of the first evaporating pipe 251 with the inlet side of the freezing evaporator 204 from the viewpoint of the cooperation with the vapor compression refrigeration system conventionally provided in the refrigerator 100. Meanwhile, a first capillary tube 271 is arranged between the first evaporation tube 251 and the electromagnetic valve 208, and a second capillary tube 272 is arranged between the first evaporation tube 251 and the freezing evaporator 204, so as to continue throttling to meet the evaporation temperature requirement (-30 ℃ or so) of the freezing chamber 111.

In some embodiments, the solenoid valve 208 is configured to: when the stirling cooler 300 is operated, the first evaporation tube 251 is conducted so as to dissipate heat from the hot end of the stirling cooler 300. That is, the first evaporation pipe 251 is conducted only when the stirling cooler 300 is in operation, so that the loss of cooling capacity can be reduced and energy can be saved.

In some embodiments, when the outlet side of the first evaporation pipe 251 is connected to the inlet side of the freezing evaporator 204, the solenoid valve 208 is configured to: when the stirling cooler 300 is operating, the first evaporation tube 251 is turned on, and the second evaporation tube 252 is turned off, so that heat is dissipated from the hot end of the stirling cooler 300 while cooling of the freezing compartment 111 is assisted. That is to say, the cold energy of the first evaporation tube 251 can be used for realizing heat dissipation of the hot end of the stirling cooler 300 and auxiliary cold supply of the refrigeration compartment 111, so that the overall utilization rate of the cold energy is improved, and the influence of the heat dissipation of the stirling cooler 300 on the refrigeration efficiency of the refrigeration compartment 111 is reduced. Meanwhile, in order to avoid supercooling of the freezing compartment 111, the refrigerator 100 of the embodiment of the present invention is further configured to: when the compartment temperature of the freezing compartment 111 is lower than the target temperature, the blower fan of the freezing compartment 111 is controlled to be turned off, and at this time, the refrigerant of the first evaporation tube 251 flows into the freezing evaporator 204 but is not blown into the freezing compartment 111. For example, the target temperature of the freezing chamber 111 is-18 ℃, and when the stirling cooler 300 is operated, the chamber temperature of the freezing chamber 111 is detected to be-15 ℃, and at this time, the blower fan of the freezing chamber 111 is controlled to continue to operate, and the freezing chamber 111 is cooled by the refrigerant of the first evaporation pipe 251. For another example, the target temperature of the freezing chamber 111 is-18 ℃, and when the stirling cooler 300 is operating, the chamber temperature of the freezing chamber 111 is detected to be-20 ℃, and the blower fan of the freezing chamber 111 is controlled to be turned off.

In some embodiments, the refrigerator 100 of embodiments of the present invention is further configured to: when the compartment temperature of the subzero compartment 112 is greater than or equal to the preset temperature threshold, the third evaporation tube 253 and the stirling refrigerator 300 are conducted out of operation, so that the vapor compression refrigeration system is independently utilized to supply cold for the subzero compartment 112; when the temperature of the cryogenic compartment 112 is lower than the preset temperature threshold, the third evaporation pipe 253 and the stirling cooler 300 are disconnected to operate, so that the stirling cooling system is independently utilized to supply cold for the cryogenic compartment 112. The refrigerator 100 of the embodiment of the invention is configured to utilize the vapor compression refrigeration system to independently supply cold to the cryogenic compartment 112 when the compartment temperature of the cryogenic compartment 112 is greater than or equal to the preset temperature threshold value, and switch to the stirling refrigeration system to independently supply cold to the cryogenic compartment 112 when the compartment temperature of the cryogenic compartment 112 is less than the preset temperature threshold value, so that the refrigeration efficiency of the cryogenic compartment 112 is integrally improved, the energy consumption of the refrigerator 100 is reduced, and the service life of the stirling refrigerator 300 is prolonged. The 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 predetermined temperature threshold may be-25 deg.c. The refrigerator 100 according to the embodiment of the present invention may intermittently obtain the compartment temperatures of the plurality of deep cooling compartments 112, and perform the aforementioned determination respectively, and after each determination, select the cooling mode according to the latest determination result, thereby implementing the matching between the cooling system and the compartment temperatures, and further effectively reducing the energy consumption.

In some embodiments, the refrigerator 100 of embodiments of the present invention is further configured to: the first operating rotational speed of the compressor 201 of the vapor compression refrigeration system when the stirling cooler 300 is operating is not lower than the second operating rotational speed of the compressor 201 when the stirling cooler 300 is not operating, and the higher the power when the stirling cooler 300 is operating, the greater the value of the first operating rotational speed that is up-regulated with respect to the second operating rotational speed. Since the first evaporation pipe 251 is conducted when the stirling cooler 300 is operated, which increases the thermal load of the vapor compression refrigeration system, the operating speed of the compressor 201 should be maintained or adjusted upward, that is, the second operating speed is not lower than the first operating speed. The higher the power of the stirling cooler 300 during operation is, the more heat is generated at the hot end, and the more the cold energy of the first evaporation tube 251 needs to be to ensure the heat dissipation effect, so that the higher the power of the stirling cooler 300 during operation is, the larger the value of the first operating speed which is adjusted up relative to the second operating speed is.

For example, the Stirling cooler 300 may have a power range of 0-80W. The compressor 201 is an inverter compressor, the maximum operating speed is 4800rpm, and the operating speed corresponding to the gear of the compressor 201 is shown in the following table 1, and is divided into R1-R9 from low to high.

TABLE 1 working speed corresponding to the compressor gear

Gear position	Working speed (rpm)
		R1	1200
R2	1600
		R3	2000
R4	2400
		R5	2700
R6	3000
		R7	3600
R8	4000
		R9	4500

TABLE 2 power and compressor gear mapping relationship for Stirling cryocoolers

The relationship between the gear of the compressor 201 and the power of the stirling cooler 300, both when the stirling cooler 300 is operating and when it is not operating, is shown in table 2. When the Stirling cooler 300 is not operating, the gear of the compressor 201 may be adjusted as desired in R1-R9.

When the stirling cooler 300 is operating and the power is in the range of 0 to 30W, i.e., the stirling cooler 300 has a low power, the compressor 201 is now in the same gear as the compressor 201 when the stirling cooler 300 is not operating. This is because although the operation of the stirling cooler 300 increases the heat load of the vapor compression refrigeration system, the stirling cooler 300 has low power and generates little heat at the hot end, and the compressor 201 may be controlled to operate in the original gear from the viewpoint of easy control and energy saving. For example, when the Stirling cooler 300 is not operating, the gear of the compressor 201 is R3, the Stirling cooler 300 starts to operate and the power is 20W, and the gear of the compressor 201 is still R3.

When the stirling cooler 300 is operating and the power is 30-60W, i.e., the power of the stirling cooler 300 is at a medium level, the gear of the compressor 201 at this time is shifted up by one from the gear of the compressor 201 when the stirling cooler 300 is not operating. Specifically, if the shift position of the compressor 201 is already R9 when the stirling cooler 300 is not operating, the shift position of the compressor 201 at this time is still R9. For example, when the gear of the compressor 201 is R3 when the Stirling refrigerator 300 is not operating, the Stirling refrigerator 300 starts to operate and has power of 40W, and the gear of the compressor 201 is adjusted up to R4. For another example, when the Stirling refrigerator 300 is not operated, the gear of the compressor 201 is R9, and when the Stirling refrigerator 300 starts to operate and the power is 40W, the gear of the compressor 201 is still R9.

When the stirling cooler 300 is operating and the power is in the range of 60-80W, i.e., the power of the stirling cooler 300 is high, the gear of the compressor 201 at this time is shifted up by two steps from the gear of the compressor 201 when the stirling cooler 300 is not operating. Specifically, if the gear of the compressor 201 is already R9 when the stirling cooler 300 is not operating then the compressor 201 is operating at 4800rpm, the maximum speed at this time. When the stirling cooler 300 is high in power, the hot side must ensure good heat dissipation, so that although the gear of the compressor 201 is already R9 when the stirling cooler 300 is not operating, it is still necessary to continue to increase the speed of the compressor 201 to its maximum speed. For example, when the gear of the compressor 201 is R3 when the Stirling refrigerator 300 is not operating, the Stirling refrigerator 300 starts to operate and the power is 70W, and the gear of the compressor 201 is adjusted up to R5. As another example, when the Stirling refrigerator 300 is not operating, the gear of the compressor 201 is R9, the Stirling refrigerator 300 is operating and the power is 70W, and the compressor 201 is operating at 4800 rpm.

A part of the heat of the stirling cooler 300 is derived from the heat generated by the drive mechanism of the main body portion 301. Accordingly, the stirling refrigeration system may further comprise: a second adapter (not shown), a heat-conducting heat pipe 342, and a heat-radiating fin 343, wherein the second adapter is thermally connected to the main body portion 301 of the stirling cooler 300 where the driving mechanism is disposed, one end of the heat-conducting heat pipe 342 is thermally connected to the second adapter, and the other end is inserted through the heat-radiating fin 343. In fig. 2, 3 and 4, the main body 301 providing the drive mechanism is enclosed within the housing, so that the second adapter is disposed within the housing and outside the main body 301, with 301 being substantially directed towards the housing to facilitate the indication of the relative positions of the main body 301 and cylindrical 302 portions. The heat of the hot end is dissipated by the first evaporation tube 251, and the main body 301 is dissipated by the heat conduction heat tube 342 and the heat dissipation fins 343, so that the overall heat dissipation effect of the stirling cooler 300 is better.

The stirling refrigeration system further includes a heat exchanger 305 and a cold conducting device 303, where the heat exchanger 305 may be disposed in the cryogenic compartment 112 to achieve that the stirling refrigeration system provides cold to the cryogenic compartment 112. Referring to fig. 4, the heat exchanger 305 may include 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 cold conducting plate 351 is provided with a plurality of fixing holes along the vertical direction, and the third evaporation tube 253 is bent and inserted into the fixing holes to be integrated with the heat exchanger 305, so that the third evaporation tube 253 can be conveniently arranged in the deep cooling chamber 112. The cold guide device 303 includes a cold end adapter 331 and a cold guide heat pipe 332, the cold end adapter 331 is fixed to the cold end of the stirling cooler 300, one end of the cold guide heat pipe 332 is thermally connected to the cold end adapter 331, and the other end is thermally connected to the rear surface of the cold guide plate 351. A third thermal insulation member 363 may be further disposed outside the cold guiding device 303. According to the refrigerator 100 provided by the embodiment of the invention, the heat exchanger 305 is arranged to include the cold guiding plate 351 and the plurality of cold guiding fins 352 arranged at intervals, so that large-area heat exchange can be realized, and the heat exchange efficiency can be improved. In the refrigerator 100 shown in fig. 1, 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.

Fig. 7 is an exploded schematic view of the double door 400 and the door frame 430 of the refrigerator 100 shown in fig. 1. Fig. 8 is a partially enlarged schematic view of fig. 7. 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. In some embodiments, 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 when 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 a common compartment (in fig. 1, the variable temperature compartment 123) share the same outer door body 401, the double-layer door 400 is set 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 is opened and closed by the outer door body 401, so that when a user takes and places articles from the common compartment, the inner door body 402 can be kept in a closed state under the condition that the outer door body 401 is opened, that is, 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 may be further disposed inside the inner door body 402, so that the temperature of the outer surface of the inner door body 402 is greater 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 refrigerator 100 of the embodiment of the present invention further 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 sealing strip may be disposed between the upper portion of the inner door body 402 and the general compartment.

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. 7, 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 sealing fixation of the inner door body 402 and the door frame 430 is realized by moving the clamping head 5121 into the clamping groove 431 and matching with the bulge 521, and the separation of the inner door body 402 and the door frame 430 is realized 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. 8, the first structure 501 includes a front end plate 511 and a side end plate 512, and a through hole matching with a 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. 8, 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 face 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 illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the 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 door and a refrigerator body, wherein at least one storage chamber is defined in the box body, and the at least one storage chamber comprises a deep cooling chamber;

the vapor compression refrigeration system is configured to provide cold energy for at least one storage compartment and is provided with a first evaporation pipe; and

and the Stirling refrigerating system is configured to provide cold for the cryogenic chamber and comprises a Stirling refrigerating machine, wherein the hot end of the Stirling refrigerating machine is configured to be thermally connected with the first evaporation pipe so as to realize cooling and heat dissipation by utilizing the cold of the first evaporation pipe.

2. The refrigerator according to claim 1,

the stirling refrigeration system further comprising: the first adapter is sleeved outside the hot end and is fixedly and thermally connected with the hot end, a plurality of fixing holes are formed in the first adapter, and the first evaporation tube bends and extends in the fixing holes in a circuitous mode.

3. The refrigerator according to claim 2,

a device chamber is formed 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 transversely arranged in the device chamber at intervals, the Stirling refrigerator is positioned behind the cryogenic chamber, and the cold end of the Stirling refrigerator is arranged upwards;

the first adapter is provided with a plurality of fixing holes along the left-right direction, the inlet side and the outlet side of the first evaporation tube are both positioned on one side, close to the compressor, of the first adapter, and heat preservation pieces are arranged outside the first adapter and outside a section, located in the device chamber, of the first evaporation tube.

4. The refrigerator according to claim 1,

the temperature of the refrigerant of the first evaporation tube is-10 ℃ to 0 ℃.

5. The refrigerator according to claim 1,

the vapor compression refrigeration system comprises a compressor, a condenser, a drying filter, an electromagnetic valve, the first evaporation pipe and an air return pipe which are sequentially connected in series; or

The vapor compression refrigeration system comprises a compressor, a condenser, a drying filter, an electromagnetic valve, a second evaporation pipe, a refrigeration evaporator and an air return pipe which are sequentially connected in series; the at least one storage chamber further comprises a freezing chamber, and the freezing evaporator is arranged in the freezing chamber to provide cold for the freezing chamber; the inlet side of the first evaporation pipe is connected with the electromagnetic valve, and the outlet side of the first evaporation pipe is connected with the inlet side of the refrigeration evaporator.

6. The refrigerator according to claim 5,

the solenoid valve is configured to: and when the Stirling refrigerator operates, the first evaporation tube is conducted so as to radiate heat to the hot end.

7. The refrigerator according to claim 5,

the inlet side of the first evaporation pipe is connected with the electromagnetic valve, and the outlet side of the first evaporation pipe is connected with the inlet side of the refrigeration evaporator;

the solenoid valve is configured to: when the Stirling refrigerator operates, the first evaporation tube is conducted, and the second evaporation tube is disconnected, so that heat dissipation is conducted on the hot end, and cooling is assisted for the freezing chamber.

8. The refrigerator according to claim 7,

a first capillary tube is arranged between the first evaporation tube and the electromagnetic valve;

and a second capillary tube is arranged between the first evaporation tube and the freezing evaporator.

9. The refrigerator according to claim 1,

the vapor compression refrigeration system also comprises a third evaporation pipe which is arranged in the deep cooling chamber so as to realize that the vapor compression refrigeration system is utilized to provide cold energy for the deep cooling chamber; wherein

The refrigerator is further configured to: when the temperature of the compartment of the cryogenic compartment is greater than or equal to a preset temperature threshold value, the third evaporation pipe and the Stirling refrigerator are conducted to be out of operation, so that the vapor compression refrigeration system is independently utilized to supply cold for the cryogenic compartment; when the room temperature of cryrogenic compartment is less than predetermine the temperature threshold, the disconnection the third evaporating pipe the stirling refrigerator operation, with the exclusive use stirling refrigerating system does the cryrogenic compartment cooling.

10. The refrigerator according to claim 1,

the refrigerator is further configured to: when the Stirling refrigerator operates, the first working rotating speed of a compressor of the vapor compression refrigeration system is not lower than the second working rotating speed of the compressor when the Stirling refrigerator does not operate, and the higher the power when the Stirling refrigerator operates is, the larger the value of the first working rotating speed which is adjusted up relative to the second working rotating speed is.

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