CN212431446U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator. The refrigerator comprises a refrigerator body, a door body and a refrigerating system, wherein the door body is arranged on the refrigerator body; the side part of the door body is arranged on the door body, and the side part of the door body is provided with a first throttling device, a first evaporator and a side gas return pipe of the door body; the first throttling device comprises a capillary tube, an inlet of the first evaporator is communicated with an outlet of the first throttling device, and an outlet of the first evaporator is communicated with an inlet of the gas return pipe on the door side; the air return pipe on the door body side is thermally connected with the capillary; one end of the first connection pipe and one end of the second connection pipe are respectively communicated with the tank-side portion at two locations of the tank-side portion. The capillary carries out the heat exchange with door side muffler, and the heat when make full use of capillary throttle can carry the temperature of second hose refrigerant, prevents the lower condensation of second hose temperature, also can improve the efficiency of refrigerator.

Description

Refrigerator with a door

Technical Field

The utility model relates to a cold-stored storing technical field of freezing especially relates to a refrigerator.

Background

At present, the market demand for realizing the ice making function on the door body is stronger. The inventor finds that in order to realize refrigeration in the space of the refrigerator door body, cold air is sent from the refrigerator box body to enter the refrigerator door body, but the defect of the mode is that the space in the refrigerator door body and the space in the refrigerator body have tainted with odor, and great trouble is brought to users. The refrigerator also has a mode of delivering cold air to the door body for making ice space from the refrigerator body, ice made by the door body can have the taste of food materials in the refrigerator, cold air is often required to be delivered from a freezing chamber evaporator through a long air duct to enter the door body (particularly a refrigeration door body), air supply resistance and cold loss are large (the air duct is often buried in a heat insulation layer of the refrigerator body), and therefore refrigeration efficiency is low. For example, when ice making or cold water making is performed on a door body of a refrigerating chamber, or an independent cooling chamber is arranged on the door body, in the prior art (such as LG), cold is provided for the door body through an air duct which is provided with a certain evaporator in a communicated box body, but the air duct is long, the heat insulation effect of the box body is influenced by the arrangement in a heat insulation layer of the box body, and meanwhile, the air duct resistance is large, so that the refrigerating efficiency is low. There is another technology (such as korean universe) that the low-temperature refrigerant of the evaporator in the refrigerator body is directly led to the door body through a hose, but the corresponding pipeline needs to be insulated before being led out from the refrigerator body and entering the door body, so that the pipeline is thick and occupies space, the appearance is greatly impaired, and meanwhile, the consistency of the insulation effect of the pipeline of different refrigerators is difficult to ensure. There is still another technology (such as beauty), draw the coolant to enter the door body from the container body with the flexible capillary, but on the refrigerator, in order to play the throttling action of the capillary, the capillary internal diameter should be less than or equal to 0.8mm, and the flexible capillary of this kind of internal diameter, the pipe diameter is apt to deform while opening and closing the door, and some changes of the capillary internal diameter, will cause the refrigeration performance to appear the deviation, the conformance is bad; in addition, the tolerance of the inner diameter and the outer diameter of the flexible pipe within 5mm (outer diameter) is usually +/-0.1 mm, the capillary pipe plays a throttling role on a refrigerator and is an important part in four large parts of a refrigerating system, the requirement on flow precision is extremely high, and the error of +/-0.1 mm inner diameter can cause great difference in flow or performance, so that mass production is difficult to realize, and the control consistency is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome at least one defect of current refrigerator door body ice-making, a novel refrigerator is provided.

In particular to a refrigerator, which comprises a refrigerator body, a door body and a refrigerating system, wherein the door body is arranged on the refrigerator body,

the refrigeration system comprises a box body side part, a door body side part, a first connecting pipe and a second connecting pipe, wherein the box body side part is arranged on the box body and is provided with a compressor; the side part of the door body is arranged on the door body, and the side part of the door body is provided with a first throttling device, a first evaporator and a side gas return pipe of the door body;

the first throttling device comprises a capillary tube, an inlet of the first evaporator is communicated with an outlet of the first throttling device, and an outlet of the first evaporator is communicated with an inlet of the return pipe on the door body side; the door body side air return pipe is thermally connected with the capillary;

one end of the first connecting pipe and one end of the second connecting pipe are respectively communicated with the side part of the box body at two positions of the side part of the box body, the other end of the first connecting pipe is communicated with an inlet of the first throttling device, and the other end of the second connecting pipe is communicated with an outlet of the door body side air return pipe, so that the refrigerant at the side part of the box body enters the first evaporator through the first connecting pipe and the first throttling device to absorb heat and vaporize, and then returns to the side part of the box body through the door body side air return pipe and the second connecting pipe.

Optionally, the refrigerator further comprises an ice making device mounted to the door body; the first evaporator is disposed in the door or in the ice making device and configured to provide cooling energy to the ice making device.

Optionally, an insulating layer is arranged in the door body, and the capillary tube is arranged in the insulating layer;

the capillary is a plurality of, a plurality of the capillary sets up in parallel, or the capillary is one.

Optionally, the first throttling means further comprises a throttling valve in series with the capillary tube, the throttling valve being disposed on a downstream side of the capillary tube.

Optionally, the capillary tube is arranged in the door body side air return pipe, or the capillary tube is in contact with the door body side air return pipe.

Optionally, the side part of the tank body further comprises a condensing device, and an inlet of the condensing device is communicated with an exhaust port of the compressor;

the first connecting pipe is communicated with a pipeline between the compressor and the condensing device; or the like, or, alternatively,

the first connecting pipe is communicated with a pipeline between an inlet and an outlet of the condensing device; or the like, or, alternatively,

the first connecting pipe is communicated with an outlet of the condensing device.

Optionally, the first connecting pipe includes a first hose, the second connecting pipe includes a second hose, and the first hose and the second hose are disposed between the box body and the door body;

the door body is rotatably arranged on the box body through a hinge, the hinge comprises a hinge hole and a hinge shaft inserted into the hinge hole, one of the hinge shaft and the hinge hole is arranged on the box body, and the other one of the hinge shaft and the hinge hole is arranged on the door body; the hinge shaft is provided with a communication hole which penetrates along the axial direction of the hinge shaft; the first hose and the second hose both pass through the communication hole.

Optionally, the refrigerator further comprises a heating device;

the heating device is configured to heat the first connection pipe;

the first hose is a pressure-resistant hose; the first hose is made of nylon or Teflon; the outer diameter of the first hose is less than or equal to 8mm, and the inner diameter of the first hose is less than or equal to 6 mm.

Optionally, the tank side part further comprises a second throttling device and a refrigeration and evaporation device, and an inlet of the first connecting pipe and an inlet of the second throttling device are in controlled communication with an outlet of the condensing device through a valve device;

and the outlet of the second connecting pipe and the outlet of the refrigeration and evaporation device are communicated with the air inlet of the compressor.

Optionally, a first storage compartment and a second storage compartment are arranged in the refrigerator body, the door body is configured to open and close the first storage compartment, and the refrigerator further comprises a second storage compartment door body for opening and closing the second storage compartment;

the condensing device comprises a condenser and a dew removing pipe which are connected in series;

the valve device comprises an electromagnetic valve and a switching valve, an inlet of the electromagnetic valve and an inlet of the switching valve are both communicated with an outlet of the dew removing pipe, and an outlet of the electromagnetic valve is communicated with the first connecting pipe;

the second throttling device comprises a first throttling structure and a second throttling structure, and an inlet of the first throttling structure and an inlet of the second throttling structure are respectively communicated with two outlets of the switching valve;

the refrigeration and evaporation device comprises a second evaporator and a third evaporator, the second evaporator is used for supplying cold to the first storage compartment, the third evaporator is used for supplying cold to the second storage compartment, an inlet of the second evaporator is communicated with an outlet of the first throttling structure, an outlet of the second evaporator and an outlet of the second throttling structure are both communicated with an inlet of the third evaporator, and an outlet of the third evaporator is communicated with an air inlet of the compressor;

a pipe section of the second connecting pipe, which is positioned on the box body, is provided with a first control valve for blocking the refrigerant from flowing to the first evaporator;

and a second control valve which obstructs the refrigerant in the refrigeration and evaporation device from flowing to the compressor when the first evaporator works alone is arranged on a pipeline between the outlet of the refrigeration and evaporation device and the air inlet of the compressor.

The utility model discloses an in the refrigerator because having first throttling arrangement, first throttling arrangement sets up on the door body, and first throttling arrangement has the capillary, can not appear in the flexible capillary scheme, probably has cooled down when the flexible capillary gets into the door body, easily leads to the condensation and loses the condition of cold volume to take place. The most common copper capillary can be adopted as the ice making capillary, the precision is high, and the realization is easy. The first throttling device is located in the door body, the ice making capillary tube is not stressed or deformed when the door is opened and closed, and the refrigerating performance is not affected. The flow rate or the performance of the capillary tube does not have great difference, the mass production is easy to realize, and the control consistency is good. And the capillary tube exchanges heat with the return air pipe on the door body side, so that the temperature of a refrigerant of the second connecting pipe can be increased by fully utilizing the heat generated when the capillary tube is throttled, the low-temperature condensation of a pipe section of the second connecting pipe between the refrigerator body and the door body is prevented, and the energy efficiency of the refrigerator can be improved.

Furthermore, the capillary tube of the first throttling device can be arranged in the heat-insulating layer of the door body, and the heat-insulating and fixing performance of the heat-insulating layer can be fully utilized, so that the refrigerator has a good door body refrigerating and ice-making function.

Furthermore, the first throttling device is arranged in the door body, the first hose can be a pressure-resistant hose, heat preservation of a pipeline is not needed, the thick occupied space of the pipe can be prevented, and no cold loss exists. The pipeline is thin, and the pipeline installation of being convenient for, for example can directly get into the door body through the hinge pin of door body from the box top, and is pleasing to the eye, and the uniformity is good, that is to say, first hose can make full use of hinge structure, and the installation of being convenient for does not influence the door body and rotates, can not influence the whole outward appearance of refrigerator, and first connecting pipe especially first hose department self structural variation is less, can not arouse situations such as pipeline jam, sudden change, has almost no influence to the performance of refrigerator.

Further, the utility model discloses an among the refrigerator, can directly utilize first evaporimeter to make ice, refrigeration water or to door body space cooling on the door body. Compare and draw cold wind through longer wind channel and give the door body cooling, the utility model discloses the box keeps warm better (the air supply wind channel of no system ice), also does not have wind channel resistance loss, and refrigeration efficiency is high. Compared with the method of guiding low-temperature refrigerant to supply cold to the door body, the method does not need to keep the temperature of a pipeline (the pipeline occupies a large space after heat preservation and is difficult to pass through a door shaft), does not have cold loss, has thin pipeline, can directly enter the door body from the top of the box body through the hinge shaft of the door body, and is attractive and good in consistency.

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 structural view of a refrigerator according to an embodiment of the present invention;

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

fig. 3 is a schematic partial structural view of a refrigerator according to an embodiment of the present invention;

fig. 4 is a schematic partial structural view of a refrigerator according to an embodiment of the present invention;

fig. 5 is a schematic partial structural view of a refrigerator according to an embodiment of the present invention;

fig. 6 to 13 are schematic views of a refrigeration system of a refrigerator according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention. As shown in fig. 1 and with reference to fig. 2 to 13, an embodiment of the present invention provides a refrigerator. The refrigerator includes a cabinet 10, a door 20, and a refrigerating system.

Storage compartments, such as a first storage compartment, a second storage compartment and a third storage compartment, are provided in the box body 10. The first storage compartment may be a cold storage compartment, the storage temperature being generally between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. The second storage compartment may be a freezer compartment, typically at a temperature in the range of-14 ℃ to-22 ℃. The third storage chamber can be a temperature-changing chamber, and the temperature in the third storage chamber can be adjusted according to requirements so as to store proper food. The door 20 is configured to open and close the first storage compartment, and the refrigerator further has a second storage compartment door that opens and closes the second storage compartment, and a third storage compartment door that opens and closes the third storage compartment. The second storage compartment door body and the third storage compartment door body can be drawer covers of the drawers.

The refrigeration system includes a cabinet-side portion, a door-side portion, a first connection pipe 41, and a second connection pipe 46. The tank-side portion is attached to the tank 10, and the tank-side portion includes a compressor 31. The door-side portion is attached to the door 20, and includes a first throttle device 42 and a first evaporator 43. The inlet of the first evaporator 43 communicates with the outlet of the first throttle device 42. One end of the first connection pipe 41 and one end of the second connection pipe 46 are respectively communicated with the tank-side portion at two locations of the tank-side portion, the other end of the first connection pipe 41 is communicated with an inlet of the first throttling means 42, and the other end of the second connection pipe 46 is communicated with an outlet of the first evaporator 43, so that the refrigerant at the tank-side portion enters the first evaporator 43 through the first connection pipe 41 and the first throttling means 42 to absorb heat and vaporize, and then returns to the tank-side portion through the second connection pipe 46. That is, when the compressor 31 of the refrigeration system is operated, the refrigerant can be made to flow to the door-side portion at two locations of the cabinet-side portion, a location connected to the first connection pipe 41, and the refrigerant can be made to flow back to the cabinet-side portion from the door-side portion at a location connected to the second connection pipe 46. For example, in some embodiments, the refrigeration system is used only for the refrigeration of the first evaporator 43, and the tank-side portion, the door-side portion, the first connection pipe 41, and the second connection pipe 46 constitute a complete compression refrigeration system. If the interior of the cabinet 10 is refrigerated, another set of refrigeration system is provided. For another example, in other embodiments, the refrigeration system may be used for refrigeration within the cabinet 10, the cabinet-side portion may be a cabinet-side refrigeration system, and the door-side portion may be connected to two locations of the cabinet-side refrigeration system to share at least the compressor 31.

The utility model discloses in the refrigerator, can directly utilize first evaporimeter 43 to make ice, refrigeration water or to door body 20 space cooling on door body 20. Compare and draw cold wind through longer wind channel and give the body 20 cooling, the utility model discloses box 10 keeps warm better (the air supply wind channel of no system ice), also does not have wind channel resistance loss, and refrigeration efficiency is high. Compared with the method of guiding low-temperature refrigerant to cool the door body 20, the method does not need to keep the temperature of the pipeline (the pipe occupies a large space after heat preservation), the pipeline is thin, and the installation is convenient. The first throttling device 42 is arranged on the door body 20, so that the situation that in a flexible capillary tube scheme, the temperature of the flexible capillary tube is possibly reduced when the flexible capillary tube enters the door body 20, condensation is easily caused, and cold energy is lost is avoided. The most common copper capillary can be adopted as the ice making capillary, the precision is high, and the realization is easy. The first throttling device 42 is positioned in the door body 20, the ice making capillary tube is not stressed or deformed when the door is opened and closed, and the refrigeration performance is not influenced. The flow rate or the performance of the capillary tube does not have great difference, the mass production is easy to realize, and the control consistency is good.

In some embodiments of the present invention, the refrigerator further includes an ice making device 50, and the ice making device 50 is installed on the door body 20. The first evaporator 43 is provided in the door 20 or in the ice making device 50, and is configured to supply coldness to the ice making device 50. In some alternative embodiments, the ice making device 50 may be replaced with an ice making water device. In other alternative embodiments, the ice-making device 50 may be replaced by the storage space of the door 20 provided on the door 20, that is, the first evaporator 43 is used to provide cold energy to the storage space of the door 20. Of course, two or three of the ice making device 50, the ice making water device and the storage space of the door body 20 may be simultaneously disposed on the door body 20.

In some embodiments of the present invention, the first throttling device 42 comprises a capillary tube, and in some optional embodiments, the first throttling device 42 further comprises a throttling valve connected in series with the capillary tube, the throttling valve being disposed on a downstream side of the capillary tube. The capillary tube of the first throttling means 42 of the present embodiment may also be referred to as an ice making capillary tube. Further, a heat insulation layer is arranged in the door body 20, and the capillary tube is arranged in the heat insulation layer. The capillary tube of the first throttling device 42 can be arranged in the heat-insulating layer of the door body 20, and the heat-insulating and fixing performance of the heat-insulating layer can be fully utilized, so that the refrigerator has a good refrigerating and ice-making function of the door body 20. The inner diameter of the capillary is less than or equal to 0.8 mm. For example, the inner diameter of the capillary is between 0.65mm and 0.75 mm. Preferably, the inner diameter of the capillary tube can be about 0.66mm and 0.70mm, which can ensure the consistency of mass production and can prevent the bend from easily collapsing.

In some embodiments of the present invention, a door-side air return pipe 45 is disposed between the second connecting pipe 46 and the first evaporator 43. The door-side muffler 45 is thermally connected to the capillary tube. The capillary tube exchanges heat with the door body side air return pipe 45, heat generated when the capillary tube is throttled is fully utilized, the temperature of the door body side air return pipe 45 can be increased, lower condensation of the temperature of a pipe section, located between the refrigerator body 10 and the door body 20, of the second connecting pipe 46 is prevented, and the energy efficiency of the refrigerator can also be improved. Furthermore, the capillary tube and the gas return pipe on the side of the patient are both made of metal materials. The capillary tube is provided in the door-body-side muffler 45, or the capillary tube is in contact with the door-body-side muffler 45. The capillary tube is copper and the door-side muffler 45 is aluminum or copper, preferably copper. Further, the number of the capillary tubes in the first throttling device 42 may be at least two, at least two capillary tubes are arranged in parallel, and are both thermally connected with the door side air return pipe 45. Two paths of heat exchange with the door body side air return pipe 45 simultaneously can reduce the heat exchange length of the door body side air return pipe 45.

In the embodiment of the utility model provides an in, can not appear in the flexible capillary scheme: the flexible capillary tube may have been cooled when entering the door body 20, which easily causes condensation and loss of cooling capacity, and the temperature when the second connecting tube 46 comes out from the door body 20 is also low due to the low temperature when the flexible capillary tube enters the door body 20, which may cause condensation and loss of cooling capacity. The utility model discloses well first connecting pipe 41 is higher than ring temperature, and the part that exposes between door body 20 and box 10 can not the condensation also does not have cold volume loss, because the abundant heat transfer of door body side muffler 45 and capillary, the refrigerant of second connecting pipe 46 is very close ring temperature and is even higher than ring temperature, and the part that exposes between door body 20 and box 10 can not the condensation also does not have cold volume loss.

The capillary tube and the door body side air return pipe 45 exchange heat in the door body 20, the heat exchange efficiency is high, the heat exchange of the length of about 1.5 meters (1-2 meters) can ensure sufficient heat exchange, and the second connecting pipe 46 is very close to the ring temperature or even higher than the ring temperature. However, in the scheme of the flexible capillary tube, the flexible capillary tube is made of a non-metal material (the metal material is flexible, the door is opened and closed for many times and is easy to break, the refrigerator generally requires 10 ten thousand times of door opening and closing), the heat exchange efficiency with the air return pipe is extremely low, the length is very long (20-100 meters estimated), sufficient heat exchange can be guaranteed, and the flexible capillary tube does not have a heat exchange function basically because the heat exchange is carried out only at the position of a door shaft in the scheme of the flexible capillary tube. In the existing door body 20 with the ice making function, the thickness of the heat insulation layer of the main body part (middle area) is very thin (30-35 mm), and only two local sides (two sides viewed from top, within 10cm of each local size) are slightly thick (the heat insulation layer is about 80 mm). To put it back, even in the scheme of the flexible capillary tube, the flexible capillary tube part can extend into the door body 20 from the door shaft, but the heat exchange between non-metal materials is close to the ring temperature when the air return pipe is output, the heat exchange length can be far more than 2 meters, even 20 meters, the heat exchange part of the flexible capillary tube and the air return pipe needs to be arranged in a thick heat insulation layer (arranged in a thin position, so that the shell of the door body 20 can be condensed and secondary leakage can be caused), the space is limited, the heat exchange length is difficult to achieve more than 2 meters, and the refrigerator is too large in size unless the door is thick, so that the refrigerator is too white to increase the size, and the door is too bulky and is difficult to accept. When the door is opened and closed, the contact between the flexible capillary tube and the flexible suction tube before and after entering the door shaft and the hinge can be loosened, so that the heat exchange effect and the refrigeration performance are influenced. The embodiment of the utility model provides a heat transfer and the switch door of capillary are irrelevant.

In some embodiments of the present invention, the case side portion further includes a condensing unit 32, and an inlet of the condensing unit 32 communicates with an exhaust port of the compressor 31. Further, the first connection pipe 41 communicates with a pipe between the compressor 31 and the condensing device 32. In some other embodiments, the first connection pipe 41 is in communication with a pipeline between an inlet and an outlet of the condensing device 32, for example, the condensing device 32 includes a condenser and a dew condensation removing pipe, the first connection pipe 41 is connected between the condenser 321 and the dew condensation removing pipe 322, and optionally, the first connection pipe 41 can also be disposed on the pipeline in the condenser 321. In some other embodiments, the first connection pipe 41 communicates with an outlet of the condensing device 32.

The tank-side part is also used for cooling the space in the tank 10, for example, the tank-side part further comprises a second throttling device 33 and a cooling and evaporating device 34, and the inlet of the first connecting pipe 41 and the inlet of the second throttling device 33 are in controlled communication with the outlet of the condensing device 32 through a valve device. The outlet of the second connection pipe 46 and the outlet of the refrigeration evaporation device 34 are both communicated with the air inlet of the compressor 31, for example, the outlet of the refrigeration evaporation device 34 is communicated with the air inlet of the compressor 31 through the tank-side return air pipe 38; the outlet of the second connection pipe 46 is connected to the tank-side return gas pipe 38. The refrigerator also includes a defrosting device for heating the refrigeration evaporating device 34.

Further, the second throttling device 33 comprises a first throttling structure 331 and a second throttling structure 332, and an inlet of the first throttling structure 331 and an inlet of the second throttling structure 332 are respectively communicated with two outlets of the valve device 36. The refrigeration and evaporation device 34 includes a second evaporator 341 for supplying cold to the first storage compartment and a third evaporator 342 for supplying cold to the second storage compartment, an inlet of the second evaporator 341 is communicated with an outlet of the first throttling structure 331, an outlet of the second evaporator 341 and an outlet of the second throttling structure 332 are both communicated with an inlet of the third evaporator 342, and an outlet of the third evaporator 342 is communicated with an air inlet of the compressor 31. The first throttling structure 331 and the second throttling structure 332 are both capillary tubes, the outlet of the third evaporator 342 communicates with the inlet of the compressor 31 through the tank-side return gas pipe 38, and the tank-side return gas pipe 38 can exchange heat with the first throttling structure 331 and/or the second throttling structure 332. The defrosting device serves to heat the third evaporator 342 for defrosting of the third evaporator 342.

The valve device 36 includes a solenoid valve and a switching valve, an inlet of the solenoid valve and an inlet of the switching valve are both communicated with an outlet of the dew condensation removing pipe 322, and an outlet of the solenoid valve is communicated with the first connecting pipe 41. The switching valve may be a one-in two-out electric switching valve, and an inlet of the first throttling structure 331 and an inlet of the second throttling structure 332 are respectively communicated with two outlets of the switching valve. In some alternative embodiments, valve device 36 is a one-in-three-out electrically operated switching valve.

In some embodiments of the present invention, the door 20 is rotatably installed on the cabinet 10 by a hinge, and the hinge can be disposed at the upper end of the door 20. The lower end of the door 20 may be mounted to the cabinet 10 by another hinge. The hinge includes a hinge hole and a hinge shaft 11 inserted into the hinge hole, one of the hinge shaft 11 and the hinge hole is mounted to the case 10, and the other is mounted to the door 20. The hinge shaft 11 has a communication hole penetrating along an axial direction thereof. For example, the hinge shaft 11 is provided on the cabinet 10 through a horizontal mounting plate, and the door 20 is provided with a hinge hole. The first connection pipe 41 has a first hose 411, and the first hose 411 passes through the communication hole. For example, the first connection pipe 41 is a hose as a whole. For another example, the first connection pipe 41 further includes a first hard pipe 412 disposed at one end or both ends of the first hose 411. The second connection pipe 46 includes a second hose 461, and the second hose 461 passes through the communication hole. For example, the second connection pipe 46 is integrally a hose. For another example, the second connection pipe 46 further includes a second hard pipe 462 disposed at one end or both ends of the second flexible pipe 461. The first hose may be referred to as a high-pressure hose, a pressure-resistant hose, and the second hose may be referred to as a low-pressure hose. The pipeline does not need to be insulated (the pipe occupies a large space after insulation and is difficult to pass through a door shaft), the cold loss is avoided, the pipeline is thin, and the pipeline can directly enter the door body 20 from the top of the box body 10 through the hinge shaft 11 of the door body 20, so that the appearance is attractive, and the consistency is good. The first hose 411 and the second hose 461 are mounted without affecting the rotation of the door 20, and the overall appearance of the refrigerator is not affected, the structural change of the first connecting pipe 41, especially the first hose 411, is small, the situations of pipeline blockage, sudden change and the like are not caused, and the performance of the refrigerator is hardly affected.

In some embodiments of the present invention, the first flexible tube 411 is made of nylon, teflon, PTFE or PFA, preferably teflon. The outer diameter of the first hose 411 is less than or equal to 8mm, and the inner diameter of the first hose 411 is less than or equal to 6 mm. Preferably, the outer diameter of the first hose 411 is less than or equal to 6mm and the inner diameter of the first hose 411 is less than or equal to 4 mm. For example, the outer diameter of the first hose 411 is less than or equal to 4.5mm, and the inner diameter of the first hose 411 is less than or equal to 2.5 mm. Preferably, the outer diameter of the first hose 411 is 4mm and the inner diameter of the first hose 411 is 2 mm. It should be noted that the diameters do not include the portions of the first hose 411 where the two ends are connected to the joint, and the joint may need to be flared. The temperature of the refrigerant flowing through the first hose 411 is substantially kept unchanged, and the first hose 411 does not need to exchange heat with the second hose 461, so that the installation and the manufacture are convenient. The first tube 411 has a proper inner diameter to ensure smooth flow of the refrigerant, and has high cooling efficiency. The first hose 411 has an appropriate outer diameter, and the first hose 411 may have an appropriate wall thickness to have an appropriate deformability and deformation restorability, and may have a sufficient and appropriate pressure resistance.

In some embodiments of the present invention, the inventor has found that, after the first evaporator 43 is disposed on the door 20, the pipe section of the second connection pipe 46 exposed between the door 20 and the box 10 is prone to condensation, especially when the compressor 31 is started again after the third evaporator 342 for the freezing chamber is defrosted. The reason for this is that when the third evaporator 342 is defrosted, the pressure and temperature of the refrigerant in the third evaporator 342 are gradually increased due to the electric heating of the defrosting compartment, so that the refrigerant migrates into the second connection pipe 46 and the first evaporator 43, and the refrigerant stored in the second connection pipe 46 and the first evaporator 43 is increased, and when the defrosting compressor 31 is turned on again, the temperature of the portion (in contact with the ambient air) of the low-pressure connection hose at the hinge shaft 11 and the top of the box 10 is low, so that the refrigerant is condensed. In this regard, the second connection pipe 46 is provided with a first control valve 48 that blocks the flow of the refrigerant to the first evaporator 43. The first control valve 48 is preferably a one-way valve. Further, a portion of the second connection pipe 46 is located on the tank 10, and the first control valve 48 is disposed on the portion of the second connection pipe 46 located on the tank 10, that is, the first control valve 48 is disposed on the pipe between the second hose 461 and the inlet of the compressor 31, that is, the second hard pipe 462 adjacent to the tank side portion of the second connection pipe 46 is disposed with a check valve for blocking the flow of the refrigerant to the first evaporator 43. The refrigerant in the side of the cabinet is prevented from migrating to the first evaporator 43, the refrigerant stored in the second connection pipe 46 and the first evaporator 43 is prevented from increasing, and the temperature of the second connection pipe 46 at the hinge shaft 11 and the top of the cabinet 10 (which may contact the ambient air) is prevented from being lowered to cause condensation when the compressor 31 is turned on again. The control valve can prevent the second connection pipe 46 from being low in temperature and prone to dewing or frosting when the refrigerator is started, and particularly prevent the second hose 461 from being dewed or frosted when the refrigerator is started.

In some embodiments of the present invention, the condensing unit 32 is thermally connected to the first connection pipe 41 to heat a portion of the pipe section of the first connection pipe 41. For example, the condensation device 32 has a heating section 323, the heating section 323 being thermally connected to the first connection pipe 41. The condensing unit 32 includes a condenser 321, a dew-removing pipe 322, and a heating pipe section 323 disposed between the dew-removing pipe 322 and the condenser 321. Preferably, a part of the first connection pipe 41 is located on the tank 10, and the condensing unit 32 heats the pipe section of the first connection pipe 41 located on the tank 10, that is, the heating pipe section 323 heats the first hard pipe 412 of the first connection pipe 41 adjacent to the side portion of the tank.

The utility model discloses in the refrigerator, because utilize condensing equipment 32 to heat first connecting pipe 41, under each operating mode, all promoted high/low pressure coupling hose slightly and exposed the temperature in the environment part, further reduced the condensation risk. Particularly, when the inlet of the first connection pipe 41 is suddenly cut off and the compressor 31 continues to operate, the refrigerant in the first connection pipe 41 continues to enter the first evaporator 43, the pipe section between the tank 10 and the door 20 of the first connection pipe 41 is lower than the ring temperature by several degrees celsius (about 5 ℃), the risk of condensation still exists in a high-temperature and high-humidity environment, and the risk of condensation on the first connection pipe 41 can be reduced. After heating by means of the condensation device 32, the temperature of the first connection 41, in particular of the first hose 411, is very close to the ring temperature (at least approximately 1 ℃ below the ring temperature), with little risk of condensation. When the door 20 is operated for cooling, for example, when the ice is made, there is no risk of condensation if the first connecting pipe 41 is heated by the condensing unit 32.

The embodiment of the utility model provides an in, ice making system during operation, the first connecting pipe 41 of condensing equipment 32 heating, condensing equipment 32 conducts heat to first connecting pipe 41, because first connecting pipe 41 entry refrigerant has the subcooling, about 2 ~ 5 ℃ lower than the temperature of condensing equipment 32 heating part, thereby make first connecting pipe 41 temperature promote, so first hose 411 temperature promotes, second hose 461 temperature also promotes slightly like this (lower than first hose 411 temperature slightly, because the ice-making capillary is to the heat transfer of ice-making muffler, ice-making muffler exit temperature is less than ice-making capillary entry temperature), low pressure connecting hose condensation risk greatly reduced. Or because the temperature of the first connecting pipe 41 is increased, the heat exchange length between the ice making capillary tube and the ice making air return pipe can be properly reduced, the second connecting pipe 46, especially the second hose 461, is still not condensed, the ice making capillary tube and the ice making air return pipe are easy to be arranged in the door body 20 after the heat exchange length between the ice making capillary tube and the ice making air return pipe is reduced, and because the thickness of the heat-insulating layer of the door body 20 is limited, the heat exchange place between the ice making capillary tube and the ice making air return pipe is. The door-side air return pipe 45 is the ice-making air return pipe described above.

In some other embodiments, the electric heating device 39 may also be used to heat the first connection pipe 41. Both the electric heating device 39 and the condensing device 32 may be referred to as heating devices or heat sources. The heating means or heat source may be turned on when the inlet of the first connection pipe 41 is cut off, preferably at a preset time before the inlet of the first connection pipe 41 is cut off, such as 30s to 60s before the cut off.

In some embodiments of the present invention, a second control valve 40 is disposed on the pipeline between the outlet of the refrigeration evaporation device 34 and the air inlet of the compressor 31, and blocks the refrigerant in the refrigeration evaporation device 34 from flowing to the compressor 31 when the first evaporator 43 works alone. That is, the tank-side return line 38 is provided with a second control valve 40 that blocks the flow of the refrigerant in the refrigeration and evaporation apparatus 34 to the compressor 31. The second control valve 40 may be a stop valve, a solenoid valve, or a flow regulating valve. The second control valve 40 may be arranged on the upstream or downstream side, preferably the downstream side, of the heat exchange line section of the tank-side return gas line 38. Further, the second control valve 40 may be disposed in the compressor 31 chamber of the case 10. A first reservoir 351 may also be provided at the outlet of the refrigeration-evaporation device 34, i.e. the outlet of the third evaporator 342 is provided with the first reservoir 351. The first reservoir 351 is located between the tank-side return air line 38 and the third evaporator 342.

In the embodiment of the present invention, the inventor finds that refrigeration is not needed when the refrigeration/freezing temperature reaches a proper temperature, and the ice-making circuit needs to refrigerate, because the compressor 31 still works, the refrigerant in the refrigeration/freezing evaporator (i.e. the second evaporator 341 and the third evaporator 342) can still be sucked into the compressor 31, and enters the ice-making circulation circuit (i.e. the door side portion), resulting in more and more refrigerant in the ice-making circulation circuit, and resulting in the deviation of the operation of the refrigeration system from the normal condition: such as condensation/frost formation of the second hose 461 and even suction of entrained liquids by the compressor 31. Although it can be improved by adding the second reservoir 44 at the outlet of the ice-making evaporator (i.e. the first evaporator 43), however: the second reservoir 44 needs to have a large size and a large volume to accommodate the surplus refrigerant (compared to a refrigeration evaporator, especially a freezing evaporator, an ice-making evaporator is small), and the space in the door 20 is very limited, so that it is difficult to accommodate the second reservoir 44 having a sufficient size. When the ice-making loop is used for refrigerating again in cold storage or freezing, if the ice-making loop works at the same time, the redundant refrigerant stored in the second liquid storage bag 44 at the outlet of the ice-making evaporator is difficult to come out again, so that the refrigerant of the cold-storage or freezing circulation loop is deficient, the refrigerating efficiency is obviously reduced, and the cold-storage or freezing temperature reduction is slow. When the refrigeration or freezing circuit refrigerates again, if the ice-making circuit does not work, the redundant refrigerant stored in the second liquid storage bag 44 at the outlet of the ice-making evaporator can slowly enter the refrigeration or freezing circulation circuit again, but the refrigeration or freezing temperature reduction is slow, and the refrigerant repeatedly moves back and forth, so that much power consumption is increased, and energy is not saved.

However, in the present application, by providing the second control valve 40 on the tank-side air return line 38, such as a solenoid valve, during cold storage or freezing refrigeration, the solenoid valve is always in an open state, and the operation of the cold storage circulation loop or the freezing circulation loop is not affected; the refrigeration or freezing is not used for refrigerating, and when the ice-making circulation loop runs, the electromagnetic valve is in a closed state, so that the refrigerant in the refrigeration or freezing evaporator is prevented from migrating to the ice-making circulation loop; when the compressor 31 is stopped, the solenoid valve is in the on state. Compared with the addition of the second liquid storage bag 44 at the outlet of the ice-making evaporator: the size/volume of the second liquid storage bag 44 can be reduced, and the second liquid storage bag is easy to place in the door body 20; or the second liquid storage bag 44 can be eliminated, and how to place the second liquid storage bag 44 in the limited space of the door body 20 is not considered; when the refrigeration or freezing is carried out again, if the ice-making loop also works at the same time, the refrigeration efficiency can be improved, and the refrigeration or freezing cooling speed is increased; when the refrigerating or freezing circuit refrigerates again, if the ice-making circuit does not work, the refrigerating or freezing temperature-reducing speed can be increased; the whole process almost does not need the refrigerant to repeatedly move back and forth, and the energy is saved.

In some embodiments of the present invention, the first evaporator 43 may include an ice making unit and a temperature maintaining unit, the ice making unit may be in contact with the ice box for making ice, the temperature maintaining unit may have fins, and the fan may be forced to circulate the ice making chamber to cool the ice making chamber, thereby maintaining the temperature of the ice making chamber. For example, two copper tubes at the upper part of the first evaporator 43 are in contact with an ice box for making ice; two copper pipes at the lower part of the first evaporator 43 are provided with fins, and the cooling needs to be supplied to the ice making chamber by forced circulation of an ice making chamber fan of the ice making chamber, so as to maintain the temperature of the ice making chamber.

In some embodiments of the present invention, the first throttling device 42 comprises a capillary tube and a throttling valve. The throttle valve may be a short pipe throttle, without a shut-off function, and a second reservoir 44 may be provided at the outlet of the first evaporator 43. If the throttle valve has a shut-off function, the second reservoir 44 may or may not be provided at the outlet of the first evaporator 43. If the throttle valve has a shut-off function, the first connecting pipe 41 and the tank-side portion may not be connected by the valve device, and the throttle valve may be shut off at the end of ice making, and the first connecting pipe 41 may not be heated, and of course, the first connecting pipe 41 may be heated. In some embodiments of the present invention, a third liquid storage pack 352 may be disposed between condenser 321 and dew removing pipe 322 of condensing unit 32, first liquid storage pack 351 and second liquid storage pack 44 may be referred to as low pressure liquid storage packs, and third liquid storage pack 352 may be referred to as high pressure liquid storage pack. In some embodiments of the present invention, the condensing unit 32 comprises an air-cooled condenser 321, a built-in condenser and a dew-removing pipe 322 connected in series. The air-cooled condenser 321 may be disposed in the cabin of the compressor 31, the built-in condenser may be disposed inside the casing to dissipate heat using the casing, and the high-pressure liquid storage pack 352 may be disposed between the air-cooled condenser 321 and the built-in condenser. In some embodiments of the present invention, a first filter-drier 37 is disposed on the outlet pipe of the condensing device 32, and a second filter-drier 47 may be disposed between the first connecting pipe 41 and the first throttling device 42.

In the present application, the term "hose" is used to indicate a flexible tube having a certain deformation and recovery capacity when subjected to an external force, so as to ensure that the door body can be elastically deformed (e.g. twisted) in an overall adaptive manner when rotated, without substantially changing the cross-sectional area of the fluid flow in the tube. The first hose 411 is a pressure-resistant hose capable of withstanding a pressure greater than or equal to a first predetermined pressure value provided by the fluid inside the hose, and the second hose 461 is a hose capable of withstanding a pressure greater than or equal to a second predetermined pressure value provided by the fluid inside the hose. The first predetermined pressure value may be greater than the second predetermined pressure value. Aiming at different refrigerants adopted by a refrigeration system, the first preset pressure values corresponding to the different refrigerants can be different, and the second preset pressure values corresponding to the different refrigerants can also be different; for example, for the R600a refrigerant, the first predetermined pressure value may be 2MPa, and the second predetermined pressure value may be 1.5 MPa. Since the pressure of the refrigerant generated in the first hose 411 is greater than the pressure generated in the second hose 461, the first hose 411 may also be referred to as a high-pressure hose, and the second hose 461 may also be referred to as a low-pressure hose. The term "rigid tube" is used in relation to "hose" without substantial deformation of the "rigid tube" and without visible, noticeable deformation which has an effect on the functioning.

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 comprises a refrigerator body, a door body and a refrigerating system, wherein the door body is arranged on the refrigerator body,

the refrigeration system comprises a box body side part, a door body side part, a first connecting pipe and a second connecting pipe, wherein the box body side part is arranged on the box body and is provided with a compressor; the side part of the door body is arranged on the door body, and the side part of the door body is provided with a first throttling device, a first evaporator and a side gas return pipe of the door body;

the first throttling device comprises a capillary tube, an inlet of the first evaporator is communicated with an outlet of the first throttling device, and an outlet of the first evaporator is communicated with an inlet of the return pipe on the door body side; the door body side air return pipe is thermally connected with the capillary;

one end of the first connecting pipe and one end of the second connecting pipe are respectively communicated with the side part of the box body at two positions of the side part of the box body, the other end of the first connecting pipe is communicated with an inlet of the first throttling device, and the other end of the second connecting pipe is communicated with an outlet of the door body side air return pipe, so that the refrigerant at the side part of the box body enters the first evaporator through the first connecting pipe and the first throttling device to absorb heat and vaporize, and then returns to the side part of the box body through the door body side air return pipe and the second connecting pipe.

2. The refrigerator according to claim 1, further comprising an ice making device,

the ice making device is mounted on the door body; the first evaporator is disposed in the door or in the ice making device and configured to provide cooling energy to the ice making device.

3. The refrigerator according to claim 1,

the door body is internally provided with a heat insulation layer, and the capillary tube is arranged in the heat insulation layer;

the capillary is a plurality of, a plurality of the capillary sets up in parallel, or the capillary is one.

4. The refrigerator according to claim 1,

the first throttling device further comprises a throttling valve connected with the capillary tube in series, and the throttling valve is arranged on the downstream side of the capillary tube.

5. The refrigerator according to claim 1,

the capillary tube is arranged in the air return pipe on the door body side, or the capillary tube is contacted with the air return pipe on the door body side.

6. The refrigerator according to claim 1,

the side part of the box body also comprises a condensing device, and an inlet of the condensing device is communicated with an exhaust port of the compressor;

the first connecting pipe is communicated with a pipeline between the compressor and the condensing device; or the like, or, alternatively,

the first connecting pipe is communicated with a pipeline between an inlet and an outlet of the condensing device; or the like, or, alternatively,

the first connecting pipe is communicated with an outlet of the condensing device.

7. The refrigerator according to claim 1,

the first connecting pipe comprises a first hose, the second connecting pipe comprises a second hose, and the first hose and the second hose are arranged between the box body and the door body;

the door body is rotatably arranged on the box body through a hinge, the hinge comprises a hinge hole and a hinge shaft inserted into the hinge hole, one of the hinge shaft and the hinge hole is arranged on the box body, and the other one of the hinge shaft and the hinge hole is arranged on the door body; the hinge shaft has a communication hole penetrating along an axial direction thereof; the first hose and the second hose both pass through the communication hole.

8. The refrigerator according to claim 7, further comprising a heating device;

the heating device is configured to heat the first connection pipe;

the first hose is a pressure-resistant hose; the first hose is made of nylon or Teflon; the outer diameter of the first hose is less than or equal to 8mm, and the inner diameter of the first hose is less than or equal to 6 mm.

9. The refrigerator according to claim 6,

the side part of the tank body also comprises a second throttling device and a refrigeration and evaporation device, and an inlet of the first connecting pipe and an inlet of the second throttling device are communicated with an outlet of the condensing device in a controlled manner through a valve device;

and the outlet of the second connecting pipe and the outlet of the refrigeration and evaporation device are communicated with the air inlet of the compressor.

10. The refrigerator according to claim 9,

the refrigerator is characterized in that a first storage compartment and a second storage compartment are arranged in the refrigerator body, the door body is configured to open and close the first storage compartment, and the refrigerator is also provided with a second storage compartment door body for opening and closing the second storage compartment;

the second throttling device comprises a first throttling structure and a second throttling structure, and an inlet of the first throttling structure and an inlet of the second throttling structure are respectively communicated with two outlets of the valve device;

the refrigeration and evaporation device comprises a second evaporator and a third evaporator, the second evaporator is used for supplying cold to the first storage compartment, the third evaporator is used for supplying cold to the second storage compartment, an inlet of the second evaporator is communicated with an outlet of the first throttling structure, an outlet of the second evaporator and an outlet of the second throttling structure are both communicated with an inlet of the third evaporator, and an outlet of the third evaporator is communicated with an air inlet of the compressor;

a pipe section of the second connecting pipe, which is positioned on the box body, is provided with a first control valve for blocking the refrigerant from flowing to the first evaporator;

and a second control valve which obstructs the refrigerant in the refrigeration and evaporation device from flowing to the compressor when the first evaporator works alone is arranged on a pipeline between the outlet of the refrigeration and evaporation device and the air inlet of the compressor.

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