CN115540462A - Refrigerator with defrosting function - Google Patents

Abstract

The invention discloses a refrigerator with defrosting function, comprising: the refrigeration loop comprises a compressor, a condenser, a refrigeration pressure-reducing component and a refrigeration evaporator which are sequentially connected end to end so that a refrigerant sequentially flows through the compressor, the condenser, the refrigeration pressure-reducing component and the refrigeration evaporator; a defrost device including a heating path and a defrost path in parallel and fixed relative to each other, the heating path being connected in series into the refrigeration circuit, the heating path being located downstream of the compressor and upstream of the refrigerated pressure reducing member; the defrosting circuit comprises the compressor, the refrigeration evaporator, a defrosting pressure reducing component and the defrosting passage which are sequentially connected end to end so that a refrigerant sequentially flows through the compressor, the refrigeration evaporator, the defrosting pressure reducing component and the defrosting passage; a control valve block selectively circulating a refrigerant in the refrigeration circuit or the defrost circuit; an evaporation pan for holding condensed water or a frost-water mixture, the evaporation pan housing at least a portion of the defrosting device. The refrigerator provided by the invention improves the defrosting efficiency of the refrigeration evaporator.

Description

Refrigerator with defrosting function

Technical Field

The invention belongs to the field of refrigeration equipment, and particularly provides a refrigerator with a defrosting function.

Background

Existing refrigerators generally include a refrigerating compartment, a refrigerating evaporator for providing cooling energy to the refrigerating compartment, a freezing compartment, and a freezing evaporator for providing cooling energy to the freezing compartment. Due to the low temperatures required in the refrigeration compartment, the temperature of the freeze evaporator is also low, resulting in frequent occurrence of frost on the surface of the freeze evaporator. In addition, the refrigeration evaporator with frost is required to be defrosted because the heat absorption efficiency of the evaporator is reduced.

The frosting phenomenon is not easy to occur due to the higher temperature of the refrigeration evaporator; therefore, in the prior art, in order to remove frost on the freezing evaporator, during defrosting of the evaporator, a compressor, the freezing evaporator, a capillary tube (or other pressure reducing device for refrigerant), and a refrigerating evaporator are connected in series in order, and the freezing evaporator is temporarily used as a condenser. In the process, the refrigerant in the refrigeration evaporator can release heat to the refrigeration evaporator, and then the frost on the refrigeration evaporator is melted.

However, since the temperature inside the cooling chamber for placing the refrigerating evaporator and the freezing evaporator is relatively low, the temperature of the refrigerant in the circuit will not rise greatly, resulting in poor defrosting effect of the refrigerating and freezing device.

Disclosure of Invention

In order to overcome the above technical problems in the prior art, an object of the present invention is to provide a new refrigerator with a defrosting function to improve the efficiency of the refrigerator in defrosting a refrigeration evaporator.

Another object of the present invention is to achieve the purpose of quick defrosting by a defrosting device that effectively uses heat generated during the refrigeration process of a refrigerator to quickly heat a refrigeration evaporator during the defrosting process of the refrigerator.

In order to achieve the above object, the present invention provides a refrigerator having a defrosting function, comprising:

the refrigeration circuit comprises a compressor, a condenser, a refrigeration pressure reducing component and a refrigeration evaporator which are sequentially connected end to end so that a refrigerant sequentially flows through the compressor, the condenser, the refrigeration pressure reducing component and the refrigeration evaporator;

a defrosting device including a heating passage and a defrosting passage that are connected in parallel and fixed relative to each other, the heating passage being connected in series to the refrigerating circuit, the heating passage being located downstream of the compressor and upstream of the refrigerant depressurizing means;

a defrosting circuit including the compressor, the refrigeration evaporator, a defrosting depressurization member, and the defrosting passage, which are sequentially connected end to allow a refrigerant to sequentially flow through;

a control valve group for selectively circulating a refrigerant in the refrigeration circuit or the defrost circuit;

an evaporation pan for receiving condensed water or a frost-water mixture, said evaporation pan accommodating at least a portion of said defrosting device.

Alternatively, one of the heating passage and the defrosting passage is located inside the other so that an annular passage is formed between the heating passage and the defrosting passage.

Optionally, the defroster further comprises a tee member, the tee member comprising:

a fixing portion fixedly connected to or integrally formed with an end portion of an outer passage of the heating passage and the defrosting passage;

a first lead-in portion communicating with the annular passage;

and a second lead portion which is hermetically fitted to an inner one of the heating passage and the defrosting passage.

Optionally, the heating passage is partially located inside the defrosting passage in a direction perpendicular to a refrigerant flow, so that a C-shaped channel is formed in the defrosting passage; or, the defrosting passage is partially positioned at the inner side of the heating passage in the direction perpendicular to the flowing direction of the refrigerant, so that a C-shaped channel is formed in the heating passage.

Optionally, the heating passage and the defrosting passage are arranged side by side; the defrosting device further includes a coating pipe that coats the heating path and the defrosting path.

Optionally, a heat transfer medium is filled between the heating passage and the defrosting passage and between the cladding pipe to transfer heat of the heating passage to the defrosting passage.

Optionally, the outer circumferential surface and/or the inner circumferential surface of the heating passage is/are provided with heat dissipation ribs; and/or, the outer peripheral surface and/or the inner peripheral surface of the defrosting passage are/is provided with heat dissipation ribs.

Alternatively, the heating passage and the defrosting passage are respectively provided as a tubular structure; and/or the area of the cross section of the heating passage is larger than the area of the cross section of the defrosting passage.

Alternatively, the aforementioned heating passage and the aforementioned defrosting passage are parallel channels formed on the same member, and the aforementioned heating passage and the aforementioned defrosting passage are adjacent to each other.

Optionally, the heating channel and/or the inner circumferential wall is provided with heat dissipating ribs or heat dissipating grooves.

Based on the foregoing description, it can be understood by those skilled in the art that, in the foregoing technical solution of the present invention, by arranging the defrosting device having the heating path and the defrosting path in the evaporating pan, and connecting the compressor, the heating path, the condenser, the refrigeration pressure reducing member and the refrigeration evaporator end to end in sequence, and connecting the compressor, the refrigeration evaporator, the defrosting pressure reducing member and the defrosting path in series in sequence, when the refrigerant circulates in the defrosting circuit, the refrigeration evaporator can be used as the condenser to uniformly dissipate heat, remove frost on the surface of the evaporator, and the defrosting path is used as the evaporator to absorb heat of condensed water in the heating path and the evaporating pan. As will be further understood by those skilled in the art, since the heating path is connected in series between the compressor and the refrigeration pressure-reducing member, the condensed water in the evaporating dish can be heated in the refrigeration mode of the refrigerator, so that the temperature of the condensed water is higher than the ambient temperature, and a large amount of heat is stored; therefore, when the refrigeration evaporator is defrosted, the defrosting channel as the evaporator can absorb heat from the high-temperature heating channel and the high-temperature condensed water, so that the evaporator can absorb heat quickly, a refrigerant circulating in the defrosting loop can obtain a large amount of heat energy quickly, the refrigeration evaporator is heated with higher speed, the quick defrosting of the refrigeration evaporator is realized, and the defrosting efficiency of the refrigeration evaporator is improved.

In addition, because the defrosting loop of the invention does not relate to the refrigeration evaporator, the refrigerant in the invention can not affect the refrigeration evaporator in the process of circulating in the defrosting loop, thereby avoiding the situation of too low refrigeration room temperature.

Further, one of the heating channel and the defrosting channel is located on the inner side of the other, so that an annular channel can be formed between the heating channel and the defrosting channel, and the defrosting device can increase the heat exchange area between the refrigerant in the defrosting channel and the refrigerant in the heating channel through the annular channel, and the heat transfer efficiency between the heating channel and the defrosting channel is improved.

Furthermore, the heating channel and the defrosting channel which are sleeved together are fixedly connected in a sealing manner through the three-way component, so that the heat conduction area between the heating channel and the defrosting channel is ensured, and the respective connection between the heating channel and the defrosting channel and the outside is facilitated.

Still further, by providing the heating passage and the defrosting passage as parallel channels formed on the same member and making the heating passage and the defrosting passage adjacent to each other, the defrosting device can be integrally manufactured by a casting process.

Drawings

In order to more clearly explain the technical solution of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the invention are not necessarily to scale relative to each other.

In the drawings:

FIG. 1 is a schematic diagram of the distribution effect of compartments in a refrigerator according to some embodiments of the present invention;

FIG. 2 is a schematic diagram of a refrigerant circulation system of a refrigerator according to some embodiments of the present invention;

FIG. 3 is a schematic view illustrating the communication effect of the refrigerant cycle system shown in FIG. 2 during the refrigeration process of the refrigerator;

FIG. 4 is a schematic view illustrating the communication effect of the refrigerant circulating system shown in FIG. 2 during defrosting of the refrigerator;

FIG. 5 is a schematic illustration of the structural effectiveness of the defroster in some embodiments of the invention;

FIG. 6 isbase:Sub>A cross-sectional view taken along A-A of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a defroster of another embodiment of the present invention;

FIG. 8 is a schematic view showing the effect of the structure of the defrosting apparatus according to still another embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8;

FIG. 10 is a schematic view showing the structural effect of the defrosting apparatus according to still another embodiment of the present invention.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, not all of the embodiments of the present invention, and the part of the embodiments are intended to explain the technical principles of the present invention and not to limit the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, shall fall within the scope of protection of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 illustrates the compartment distribution of a refrigerator according to some embodiments of the present invention.

In the some embodiments, the refrigerator includes a cabinet 1, a refrigerating compartment 2, a freezing compartment 3, a refrigerating compartment 4, a press compartment 5, and an evaporating dish 6. The refrigerating chamber 2, the freezing chamber 3, the refrigerating chamber 4 and the press bin 5 are sequentially arranged in the box body 1 from top to bottom. Alternatively, the distribution of the refrigerating chamber 2, the freezing chamber 3, the refrigerating chamber 4 and the press cabin 5 in the box body 1 can be adjusted by those skilled in the art according to the needs, for example, the refrigerating chamber 2 is arranged below the freezing chamber 3, and the refrigerating chamber 4 and the press cabin 5 are arranged side by side at the lowest position of the box body 1; the refrigerating compartment 4 is provided at one side in the horizontal direction of the refrigerating compartment 2 and/or the freezing compartment 3. In addition, those skilled in the art can omit the refrigerating chamber 2 as necessary. The evaporation pan 6 is arranged in the press cabin 5, or the person skilled in the art can arrange the evaporation pan 6 in any other feasible position on the box 1, as desired, for example, a separate cabin is provided for the evaporation pan 6.

Fig. 2 to 4 are schematic views illustrating a refrigerant circulation system of a refrigerator according to some embodiments of the present invention.

As shown in fig. 2, in some embodiments, the refrigerator (specifically, the refrigerant circulation system of the refrigerator) further includes a compressor 7, a condenser 8, a dryer 9, a refrigeration pressure reducing component 10, a refrigeration evaporator 11, a gas-liquid separator 12, a bypass branch 13, a control valve set 14, a defrosting pressure reducing component 15, and a defrosting device 16. Wherein the compressor 7 and the condenser 8 are arranged in the press cabin 5 and the refrigeration evaporator 11 is arranged in the refrigeration compartment 4. A defrosting device 16 is arranged in the evaporating dish 6. The evaporating dish 6 is used for receiving and storing condensed water. The defrosting means 16 are also arranged to be at least partly flooded by the condensation water in the evaporating dish 6. Preferably, the defrosting device 16 can be totally flooded by the condensation water inside the evaporating dish 6. That is, as shown in fig. 2, the condensate water level 17 is located above the defroster 16. With continued reference to fig. 2, the defroster 16 includes a heating path 161 and a defrost path 162 that are parallel and fixed relative to each other, the heating path 161 and the defrost path 162 being configured to exchange heat such that the defrost path 162 can absorb heat from the heating path 161. The defroster 16 will be described in detail later with reference to the drawings.

With continued reference to fig. 2, the compressor 7, the heating path 161, the condenser 8, the dryer 9, the refrigeration pressure reducing member 10, the refrigeration evaporator 11, and the gas-liquid separator 12 are sequentially connected in series end to form a refrigeration circuit of the refrigerator. The dryer 9 may be configured to filter out foreign matters in the refrigerant and dry the refrigerant. Therefore, on the premise that the refrigerant meets the actual application requirements, a person skilled in the art can also omit the dryer 9 according to the actual needs; alternatively, the dryer 9 is placed in any other feasible location in the refrigeration circuit. For example, the dryer 9 is connected in series between the compressor 7 and the heating path 161.

As will be understood by those skilled in the art, since the heating path 161 is located below the surface 17 of the condensed water in the evaporation pan 6, and the heating path 161 is connected in series between the compressor 7 and the condenser 8, when the high-temperature refrigerant flowing out of the compressor 7 flows through the heating path 161, heat can be transferred to the condensed water in the evaporation pan 6, so as to heat the condensed water, and promote evaporation of the condensed water.

With continued reference to fig. 2, a bypass branch 13 is connected in parallel with the condenser 8 and the refrigerant pressure-reducing means 10 in series, and one end of the bypass branch 13 communicates with the compressor 7 and the other end of the bypass branch 13 communicates with the refrigerant evaporator 11.

With continued reference to fig. 2, the refrigeration evaporator 11 and the gas-liquid separator 12 are also connected in series by the defrosting pressure reducing member 15 and the defrosting passage 162 communicating with each other, wherein the series connection of the defrosting pressure reducing member 15 and the defrosting passage 162 constitutes a defrosting branch of the refrigerator.

With continued reference to fig. 2, the bypass branch 13, the refrigeration evaporator 10, the defrosting branch (the defrosting depressurization member 15 and the defrosting passage 162), the gas-liquid separator 12, and the compressor 7 are sequentially communicated end to end, and thus form a defrosting circuit.

In some embodiments shown in fig. 2, refrigerant is selectively circulated through the refrigeration circuit or the defrost circuit by control valve block 14. The method comprises the following specific steps:

as shown in fig. 2, the control valve group 14 includes a first control valve 141 and a second control valve 142. The first control valve 141 is communicated with an outlet of the compressor 7, an inlet of the heating passage 161, and an inlet of the bypass branch 13, respectively, so that the refrigerant flowing out of the compressor 7 selectively flows to the heating passage 161 or the bypass branch 13. The second control valve 142 communicates with the outlet of the refrigeration evaporator 11, the inlet of the defrosting pressure-reducing member 15, and the inlet of the gas-liquid separator 12, respectively, so that the refrigerant flowing out of the refrigeration evaporator 11 selectively flows toward the defrosting pressure-reducing member 15 or directly toward the gas-liquid separator 12.

Further, when the first control valve 141 controls the flow of the refrigerant from the compressor 7 to the heating passage 161, the second control valve 142 controls the flow of the refrigerant from the refrigeration evaporator 11 directly to the gas-liquid separator 12 to turn on the refrigeration circuit, thereby circulating the refrigerant in the refrigeration circuit. When the first control valve 141 controls the refrigerant to flow from the compressor 7 to the bypass branch 13, the second control valve 142 controls the refrigerant to flow from the refrigeration evaporator 11 to the defrosting pressure reducing member 15 to turn on the defrosting circuit, thereby circulating the refrigerant in the defrosting circuit. As shown in particular in fig. 3 and 4.

Fig. 3 is a schematic diagram illustrating a refrigerant circulating in a refrigeration circuit according to some embodiments of the present invention, and fig. 4 is a schematic diagram illustrating a refrigerant circulating in a defrost circuit according to some embodiments of the present invention. In fig. 3 and 4, the solid lines between the members connected in series indicate that the refrigerant is allowed or allowed to flow; the dashed lines between the components connected in series indicate that no or no refrigerant is allowed to flow.

As shown in fig. 3, in the refrigeration circuit, the first control valve 141 controls the flow of the refrigerant from the compressor 7 to the heating passage 161, and the second control valve 142 controls the flow of the refrigerant from the refrigeration evaporator 11 to the defrosting pressure reducing member 15. The refrigerant circulates in sequence through the compressor 7, the first control valve 141, the heating path 161, the condenser 8, the dryer 9, the cooling and depressurizing device 10, the cooling evaporator 11, the second control valve 142, and the gas-liquid separator 12.

As shown in fig. 4, in the defrost circuit, the first control valve 141 controls the flow of the refrigerant from the compressor 7 to the bypass branch 13, and the second control valve 142 controls the flow of the refrigerant from the refrigeration evaporator 11 to the defrost pressure reducing member 15.

The refrigerant circulates in sequence through the compressor 7, the bypass line 13, the refrigeration evaporator 10, the defrosting pressure-reducing member 15, the defrosting passage 162, and the gas-liquid separator 12.

It should be noted that, in addition to the three-way valve shown in fig. 2 to 4, the first control valve 141 and the second control valve 142 can be provided as the three-way valve, and the first control valve 141 and/or the second control valve 142 can be provided as any other valve element, such as two parallel stop valves, four-way valves, etc., as required by those skilled in the art.

As will be understood by those skilled in the art, during the circulation of the refrigerant in the refrigeration circuit shown in fig. 3, the heating path 161 serves as a heat dissipation member for the refrigerant, so that the refrigerant can dissipate heat into the condensed water in the evaporating dish 6 when flowing through the heating path 161, and heat the condensed water, so that the temperature of the condensed water is higher than the ambient temperature, and thus a large amount of heat energy is stored.

It will also be understood by those skilled in the art that the refrigeration evaporator 11 serves as a condenser for the refrigerant that is being cooled during its circulation in the defrost circuit shown in fig. 4. That is, since the refrigerant has a high temperature when flowing out of the compressor 7, the refrigerant can uniformly release a large amount of heat to the refrigeration evaporator 11 when flowing through the refrigeration evaporator 11, so that the frost on the outer surface of the refrigeration evaporator 11 can be rapidly and uniformly melted. The refrigerant is decompressed and expanded after passing through the defrosting decompression member 15, and the temperature of the refrigerant is lowered, so that the refrigerant absorbs heat from the heating path 161 and the condensed water when passing through the defrosting path 162, and the heat is supplemented to the defrosting circuit, and is intensively released at the refrigerating evaporator 11 to melt the frost. Since the condensed water in the defrosting passage 162 and the evaporation pan 6 stores a large amount of heat in the refrigeration circuit shown in fig. 3, the defrosting passage 162 rapidly absorbs a large amount of heat from the condensed water in the defrosting passage 162 and the evaporation pan 6 in the defrosting circuit shown in fig. 4, so that the temperature of the refrigerant is rapidly increased, and the refrigerant is rapidly released heat to the refrigeration evaporator 11 when flowing through the refrigeration evaporator 11, thereby rapidly melting the frost.

It can be seen that the refrigerator of the present invention enables the defrosting device 16 to fully utilize the residual heat of the condensed water in the evaporating dish 6 to defrost the refrigeration evaporator 11 by arranging the defrosting device 16 in the evaporating dish 6 and being immersed by the condensed water in the evaporating dish 6. The heat load of the defrosting loop is increased, the defrosting time of the refrigeration evaporator 11 is shortened, the air in the refrigeration chamber 4 is prevented from generating large temperature rise, and the temperature rise of the refrigerating chamber 2 and the freezing chamber 3 is effectively restrained; meanwhile, the energy consumption of the refrigeration evaporator 11 during defrosting is reduced.

It should be noted that the refrigeration pressure-reducing member 10 and/or the defrosting pressure-reducing member 15 of the present invention may be a member having an orifice or a pressure-reducing valve, in addition to the capillary tube shown in fig. 2 to 4.

Further, although not shown in the drawings, the refrigerator further includes an ambient temperature sensor for detecting the ambient temperature, a high temperature sensor for detecting the temperature of the heating path 161 or the condensed water, and a defrosting sensor for detecting the temperature of the refrigerating evaporator 11. When the refrigerator receives a defrosting instruction, the refrigerator is firstly controlled to pre-cool the refrigerating chamber 2 and/or the freezing chamber 3, and the condensing fan of the condenser 8 is stopped. The refrigerator is then operated according to the defrost circuit shown in fig. 4. When the high temperature sensor detects that the temperature is reduced to be equal to the ambient temperature, the condensing fan of the condenser 8 is operated; when the defrosting sensor detects that the refrigeration evaporator 11 reaches the defrosting temperature, the compressor 7 and the condensing fan are stopped and continued for a while. The refrigerator repeats the above-described operations described in this paragraph a number of times to achieve the goal of completing the defrost.

Fig. 5 and 6 are schematic views illustrating the structural effect of the defrosting device in some embodiments of the present invention.

As shown in fig. 5 and 6, in some embodiments, the heating path 161 and the defrosting path 162 are both pipe-shaped members, and the heating path 161 is disposed inside the defrosting path 162 such that an annular passage 163 is formed between the heating path 161 and the defrosting path 162. Further, the defroster 16 further includes a tee member 164 that relatively fixes the heating path 161 and the defroster path 162 together. Specifically, the three-way member 164 includes a fixed portion 1641, a first lead portion 1642, and a second lead portion 1643. Wherein the fixing portion 1641 is fixedly connected with or integrally formed with an end portion of the heating path 161, and preferably, the fixing portion 1641 is fixedly connected with an end portion of the heating path 161 in a sealing manner. The first lead portion 1642 communicates with the annular channel 163, so that the refrigerant flows into or out of the annular channel 163 through the first lead portion 1642. The second lead portion 1643 is sealingly sleeved with the defrost passage 162.

Preferably, the area of the cross section of the heating path 161 is larger than that of the defrosting path 162, so as to prevent a large resistance from being generated when the refrigerant flowing out of the compressor 7 flows through the heating path 161 again.

As will be understood by those skilled in the art, the existence of the annular passage 163 enables the refrigerant of the annular passage 163 to be in sufficient contact with the circumferential wall of the heating passage 161, so that the refrigerant in the defrosting passage 162 can rapidly absorb heat of the heating passage 161 through the sufficient contact.

It will also be understood by those skilled in the art that the heating path 161 is disposed outside the defrosting path 162 because the refrigerator does not defrost the refrigeration evaporator 11 very often and does not require the defrosting path 162 to absorb heat all the time, while the heating path 161 needs to heat the condensed water in the evaporating dish 6 all the time; the heating path 161 is disposed outside the defrost path 162 in order to avoid heat loss.

Of course, the defrosting passage 162 may be disposed outside the heating passage 161 according to actual needs by those skilled in the art.

Further, although not shown in the drawings, a person skilled in the art may also provide heat dissipation ribs on the outer circumferential surface and/or inner circumferential surface of the heating passage 161 as needed; and heat dissipation ribs are provided on the outer circumferential surface and/or the inner circumferential surface of the defrosting passage 162 as necessary. It can be understood by those skilled in the art that by providing the heat dissipating ribs on the heating path 161 and/or the defrosting path 162, the heat exchange speed between the refrigerant in the corresponding path and the outside can be increased, so as to increase the evaporation rate of the condensed water or the frost-water mixture in the evaporating dish 6 and increase the defrosting efficiency of the refrigeration evaporator 11.

FIG. 7 is a schematic cross-sectional view of a defroster in other embodiments.

In this other embodiment, the defrost passage 162 is partially positioned inside the heating passage 161 in a direction perpendicular to the flow of the refrigerant, and thus a C-shaped channel 165 is formed between the heating passage 161 and the defrost passage 162. Alternatively, one skilled in the art may position the heating passage 161 partially inside the defrosting passage 162 in a direction perpendicular to the refrigerant flow, if necessary.

Further, in the other embodiment, both ends of the heating path 161 and the defrosting path 162 may be directly connected to the external pipe, respectively, without the help of the tee member 164. Illustratively, a joint is provided at a portion where the end of the heating path 161 and/or the defrosting path 162 is exposed.

Further, although not shown in the drawings, a person skilled in the art may also provide heat dissipation ribs on the inner peripheral wall of the heating path 161 and/or the defrosting path 162 as needed. It can be understood by those skilled in the art that by providing the heat dissipating ribs on the heating path 161 and/or the defrosting path 162, the heat exchange speed between the refrigerant in the corresponding path and the outside can be increased, so as to increase the evaporation rate of the condensed water or the frost-water mixture in the evaporating dish 6 and increase the defrosting efficiency of the refrigeration evaporator 11.

Fig. 8 and 9 illustrate defrosting arrangements in still other embodiments of the invention.

As shown in fig. 8 and 9, in the further embodiments, the heating passage 161 and the defrosting passage 162 are both pipe-shaped members, and the heating passage 161 and the defrosting passage 162 are arranged side by side. Further, the defroster 16 further includes a cladding pipe 166 that wraps the outside of the heating path 161 and the defroster path 162 so that the heating path 161 and the defroster path 162 can be closely abutted to each other under the restriction of the cladding pipe 166.

Preferably, cladding tube 166 is a heat shrink tube made of a heat shrink material. Further, it is also possible for those skilled in the art to provide the clad pipe 166 in any other possible structure, such as a wire, an adhesive tape, or a plastic, which is wound outside the heating path 161 and the defrosting path 162, as needed.

Further, in order to improve the heat conduction performance between the heating path 161 and the defrosting path 162, a heat conductive medium 167 is filled between the heating path 161 and the defrosting path 162 and the cladding pipe 166.

Fig. 10 illustrates a defroster in still other embodiments of the present invention.

As shown in fig. 10, in this further embodiment, the heating path 161 and the defrost path 162 are parallel channels formed on the same member (i.e., the path carrier 168), and the heating path 161 and the defrost path 162 are adjacent to each other.

The via carrier 168 is a member made of a heat conductive material, such as a metal block.

So far, the technical solution of the present invention has been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without departing from the technical principle of the present invention, a person skilled in the art may split and combine the technical solutions in the above embodiments, and may make equivalent changes or substitutions for related technical features, and any changes, equivalents, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.

Claims (10)

1. A refrigerator having a defrosting function, comprising:

the refrigeration circuit comprises a compressor, a condenser, a refrigeration pressure reducing component and a refrigeration evaporator which are sequentially connected end to end so that a refrigerant sequentially flows through the compressor, the condenser, the refrigeration pressure reducing component and the refrigeration evaporator;

a defrost device including a heating path and a defrost path in parallel and fixed relative to each other, the heating path being connected in series into the refrigeration circuit, the heating path being located downstream of the compressor and upstream of the refrigerated pressure reducing member;

the defrosting circuit comprises the compressor, the refrigeration evaporator, a defrosting depressurization component and the defrosting passage which are sequentially connected end to end so that a refrigerant sequentially flows through the compressor, the refrigeration evaporator, the defrosting depressurization component and the defrosting passage;

a control valve block that selectively circulates a refrigerant in the refrigeration circuit or the defrost circuit;

an evaporation pan for holding condensed water or a frost-water mixture, the evaporation pan housing at least a portion of the defrosting device.

2. The refrigerator having a defrosting function according to claim 1,

one of the heating passage and the defrost passage is located inside the other so that an annular channel is formed between the heating passage and the defrost passage.

3. The refrigerator having a defrosting function according to claim 2, wherein,

the defrosting apparatus further includes a tee member including:

a fixing portion fixedly connected to or integrally formed with an end portion of a passage located on an outer side of the heating passage and the defrosting passage;

a first lead-in portion in communication with the annular channel;

a second lead portion that is fitted in a sealed manner to an inside passage of the heating passage and the defrosting passage.

4. The refrigerator having a defrosting function according to claim 1, wherein,

the heating channel is partially positioned on the inner side of the defrosting channel in the direction vertical to the flowing direction of the refrigerant, so that a C-shaped channel is formed in the defrosting channel; alternatively, the first and second liquid crystal display panels may be,

the defrosting passage is partially positioned on the inner side of the heating passage in the direction perpendicular to the flowing direction of the refrigerant, so that a C-shaped channel is formed in the heating passage.

5. The refrigerator having a defrosting function according to claim 1,

the heating passage and the defrosting passage are arranged side by side;

the defrosting device further includes a cladding pipe cladding the heating path and the defrosting path.

6. The refrigerator having a defrosting function of claim 5, wherein,

and heat-conducting media are filled between the heating channel and the defrosting channel and between the cladding pipes so as to transfer the heat of the heating channel to the defrosting channel.

7. The refrigerator having a defrosting function according to any one of claims 1 to 6,

the outer circumferential surface and/or the inner circumferential surface of the heating passage are/is provided with heat dissipation ribs; and/or the like, and/or,

and heat dissipation ribs are arranged on the outer peripheral surface and/or the inner peripheral surface of the defrosting passage.

8. The refrigerator having a defrosting function according to any one of claims 1 to 6, wherein,

the heating passage and the defrosting passage are respectively provided as a tubular structure; and/or the like, and/or,

the area of the heating path cross-section is larger than the area of the defrosting path cross-section.

9. The refrigerator having a defrosting function according to claim 1,

the heating passage and the defrosting passage are parallel channels formed on the same member, and the heating passage and the defrosting passage are adjacent to each other.

10. The refrigerator according to claim 9, wherein the heating path and/or the inner peripheral wall is provided with a heat dissipating rib or a heat dissipating groove.

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