A refrigerator with a single-system multi-loop air duct and its working method

Abstract

The present invention discloses a refrigerator with a single-system multi-cycle air duct and its working method. The system includes: a refrigerator cabinet body, which includes a refrigerating compartment and a freezing compartment; a multi-cycle air duct, including an air-cooled circulation air duct for the refrigerating compartment and a circulation air duct for the freezing compartment; a fan is provided on each of the two circulation air ducts; an evaporator divided into two regions by a partition, and each region is communicated with the circulation air duct of each compartment; a compressor; air doors installed on the air supply duct of the refrigerating compartment, on the air return duct of the freezing compartment, and between the air supply duct of the refrigerating compartment and the air supply duct of the freezing compartment; by controlling the actions of the fans, air doors and compressors, the air flow separation of the circulation air duct of the refrigerating compartment and the circulation air duct of the freezing compartment is realized; the refrigerator with a single-system multi-cycle air duct proposed by the present invention can realize the refrigeration of multiple compartment temperature zones with only one evaporator, ensuring that the compartments do not have cross-taste. Compared with the existing refrigerators with a double-evaporator system, it has the advantages of compact structure, easy production and installation, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly relates to a refrigerator with a single - system multi - cycle air duct and its working method. Background Art

[0002] Under the existing refrigerator refrigeration technology conditions, there are mainly two technologies to achieve multi - compartment multi - temperature - zone refrigeration: The first is to adopt a dual - evaporator cycle refrigeration system, which includes multiple evaporators and a compressor, and has a relatively high temperature control accuracy, as shown in patent CN202411168970.2. However, the refrigerator using this technology usually has a more complex structure, and the connection structure between the evaporators needs to be welded during installation. The welding process is difficult, which may lead to installation difficulties and affect the operation efficiency of the refrigerator. At the same time, the structure of the dual - cycle system refrigerator is not as compact as that of the single - evaporator system, which may reduce the effective volume of the refrigerator. The second technology is to design an independent air duct system for each compartment and add a cold - storage compartment, and use the cold - conducting plate of the cold - storage compartment to realize the heat exchange of the air flow in each compartment and the separated refrigeration of the air flow in each compartment, as shown in patent CN202410966772.4. This technology can effectively separate the supply and return air flows of each compartment, but the heat transfer efficiency of the heat insulation plate is relatively low.

[0003] Therefore, it is necessary to propose a refrigerator solution that can meet the requirements of air flow separation in each compartment and prevent odor cross - contamination on a single - evaporator system. Summary of the Invention

[0004] In view of the deficiencies of the above - mentioned prior art, the purpose of the present invention is to provide a refrigerator with a single - system multi - cycle air duct and its working method, aiming to solve the problems of difficult installation of dual evaporators in the existing dual - cycle refrigerators and easy odor cross - contamination of single - evaporator refrigerators.

[0005] The technical solution adopted by the present invention to solve the technical problems is as follows:

[0006] A refrigerator with a single - system multi - cycle air duct, comprising:

[0007] A refrigerator cabinet 1, the refrigerator cabinet 1 includes a refrigerating compartment 101 and a freezing compartment 102;

[0008] An evaporator 2, the evaporator 2 is arranged on the back side of the refrigerator cabinet 1 and is separated into an evaporator refrigerating area 201 and an evaporator freezing refrigerating area 202 by a partition 3;

[0009] A compressor 4, the compressor 4 is arranged at the bottom of the back side of the refrigerator cabinet 1;

[0010] The refrigerating compartment air duct 5 is arranged at the back side of the refrigerator cabinet body 1 and includes a refrigerating compartment air supply duct 501, a refrigerating compartment air return duct 502, a refrigerating compartment fan 503 and a refrigerating compartment air supply duct air door 504;

[0011] The refrigerating compartment air duct 5 is communicated with the refrigerating compartment 101 to form a refrigerating compartment air-cooling circulation loop. The refrigerating compartment air-cooling circulation loop circulates for refrigeration according to the temperature control rule of the refrigerating compartment 101. When the temperature of the refrigerating compartment 101 is higher than the upper limit of the specified temperature control range, the refrigerating compartment air-cooling circulation loop starts to circulate for refrigeration. When the temperature of the refrigerating compartment 101 is lower than the lower limit of the specified temperature control range, the refrigerating compartment air-cooling circulation loop stops circulating for refrigeration;

[0012] The freezing compartment air duct 6 is arranged at the back side of the refrigerator cabinet body 1 and includes a freezing compartment air supply duct 601, a freezing compartment air return duct 602, a freezing compartment fan 603, a freezing compartment air return duct air door 604 and an air door 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct;

[0013] The freezing compartment air duct 6 is communicated with the freezing compartment 102 to form a freezing compartment air-cooling circulation loop. The freezing compartment air-cooling circulation loop circulates for refrigeration according to the temperature control rule of the freezing compartment 102. When the temperature of the freezing compartment 102 is higher than the upper limit of the specified temperature control range, the freezing compartment air-cooling circulation loop starts to circulate for refrigeration. When the temperature of the freezing compartment 102 is lower than the lower limit of the specified temperature control range, the freezing compartment air-cooling circulation loop stops circulating for refrigeration.

[0014] The partition 3 is made of aluminum plate or copper plate and is tightly connected to the back plate of the freezing compartment air duct and the inner liner of the box body, playing a role in isolating the return air flow of the evaporator refrigerating area 201 and the evaporator freezing area 202.

[0015] The calculation method for the areas of the evaporator refrigerating area 201 and the evaporator freezing area 202 is as follows: Wherein, A is the area of the region, v is the volume factor of the compartment, the subscript 1 represents the evaporator refrigerating area, the subscript 2 represents the evaporator freezing area, v takes 0.2 when the compartment volume V < 100L, v takes 0.3 when 100L < V < 200L, and v takes 0.5 when V > 200L.

[0016] The compressor 4 adopts a fixed-frequency compressor or a variable-frequency compressor. When a variable-frequency compressor is selected, the compressor is provided with a first gear with the highest speed, a second gear with a relatively high speed and a third gear with the lowest speed.

[0017] The air damper 504 of the air supply duct in the refrigerating compartment, the air damper 604 of the return air duct in the freezing compartment, and the air damper 605 between the air supply duct in the refrigerating compartment and the air supply duct in the freezing compartment are of the electric type and can achieve opening adjustment of 0% or 100%.

[0018] For the working method of the refrigerator with a single-system multi-cycle air path, when the air-cooled circulation circuits in the refrigerating compartment and the freezing compartment are circulating and refrigerating simultaneously, the fan 503 in the refrigerating compartment is turned on, the air damper 504 of the air supply duct in the refrigerating compartment is opened, the fan 603 in the freezing compartment is turned on, the air damper 604 of the return air duct in the freezing compartment is closed, and the air damper 605 between the air supply duct in the refrigerating compartment and the air supply duct in the freezing compartment is closed. When the compressor 4 is a fixed-frequency compressor, the compressor starts to operate. When the compressor 4 is a variable-frequency compressor, the compressor starts to operate at the first gear.

[0019] When only the air-cooled circulation circuit in the refrigerating compartment is circulating and refrigerating, the fan 503 in the refrigerating compartment is turned on, the air damper 504 of the air supply duct in the refrigerating compartment is opened, the fan 603 in the freezing compartment is turned off, the air damper 604 of the return air duct in the freezing compartment is closed, and the air damper 605 between the air supply duct in the refrigerating compartment and the air supply duct in the freezing compartment is closed. When the compressor 4 is a fixed-frequency compressor, the compressor starts to operate. When the compressor 4 is a variable-frequency compressor, the compressor starts to operate at the third gear.

[0020] When only the air-cooled circulation circuit in the freezing compartment is circulating and refrigerating, the fan 503 in the refrigerating compartment is turned off, the air damper 504 of the air supply duct in the refrigerating compartment is closed, the fan 603 in the freezing compartment is turned on, the air damper 604 of the return air duct in the freezing compartment is opened, and the air damper 605 between the air supply duct in the refrigerating compartment and the air supply duct in the freezing compartment is opened. When the compressor 4 is a fixed-frequency compressor, the compressor starts to operate. When the compressor 4 is a variable-frequency compressor, the compressor starts to operate at the second gear.

[0021] When both the air-cooled circulation circuits in the refrigerating compartment and the freezing compartment stop circulating and refrigerating, the fan 503 in the refrigerating compartment is turned off, the fan 603 in the freezing compartment is turned off, and the compressor 4 stops operating.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The refrigerator with a single-system multi-cycle air path proposed by the present invention can achieve independent refrigeration of multiple compartments with only one evaporator. The refrigerating airflows of each compartment are independent of each other, effectively preventing the phenomenon of food flavor mixing, and thus enabling a better food storage effect.

[0024] (2) The refrigerator with a single - system multi - cycle air duct proposed by the present invention only designs one evaporator, which has the advantages of better airtightness, easier installation, and lower production cost compared with the multi - evaporator system that can currently achieve separated - chamber air - flow refrigeration. In addition, due to its more compact structure, it can increase the effective volume of the refrigerator.

[0025] (3) The working method of the refrigerator with a single - system multi - cycle air duct proposed by the present invention has multiple working modes. By controlling the opening and closing of the air dampers and the compressor frequency according to the circulation state of the separated air flow, precise control of the chamber temperature can be achieved, and at the same time, waste of the cooling capacity of the evaporator can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cabinet structure of the refrigerator with a single - system multi - cycle air duct provided by the present invention.

[0027] Figure 2 It is a schematic diagram of the back - side air - duct structure of the refrigerator with a single - system multi - cycle air duct provided by the present invention.

[0028] Figure 3 It is a schematic diagram of the damper structure and evaporator partition between the refrigerating - chamber air - supply air duct and the freezing - chamber air - supply air duct of the refrigerator with a single - system multi - cycle air duct provided by the present invention.

[0029] In the figure: 1. Refrigerator cabinet; 101. Refrigerating chamber; 102. Freezing chamber; 2. Evaporator; 201. Evaporator refrigerating area; 202. Evaporator freezing area; 3. Partition; 4. Compressor; 5. Refrigerating - chamber air duct; 501. Refrigerating - chamber air - supply air duct; 502. Refrigerating - chamber return air duct; 503. Refrigerating - chamber fan; 504. Damper of refrigerating - chamber air - supply air duct; 6. Freezing - chamber air duct; 601. Freezing - chamber air - supply air duct; 602. Freezing - chamber return air duct; 603. Freezing - chamber fan; 604. Damper of freezing - chamber return air duct; 605. Damper between refrigerating - chamber air - supply air duct and freezing - chamber air - supply air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more concise, the present invention will be further described in detail below with reference to the accompanying drawings and an embodiment. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Embodiment

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be construed as limiting the present invention.

[0033] AsFigures 1 - 3 As shown in the figure, a refrigerator with a single - system multi - cycle air duct includes: a refrigerator cabinet body 1, and the refrigerator cabinet body 1 includes a refrigerating compartment 101 and a freezing compartment 102. An evaporator 2, the evaporator 2 is arranged on the back side of the refrigerator cabinet body 1 and is separated by a partition 3 into an evaporator refrigerating area 201 for the refrigerator and an evaporator freezing area 202. A compressor 4, the compressor 4 is arranged at the bottom of the back side of the refrigerator cabinet body 1, and a fixed - frequency compressor or a variable - frequency compressor can be selected. A refrigerating compartment air duct 5, the refrigerating compartment air duct 5 is arranged on the back side of the refrigerator cabinet body 1, and includes a refrigerating compartment air - supply duct 501, a refrigerating compartment air - return duct 502, a refrigerating compartment fan 503 and a refrigerating compartment air - supply duct air damper 504. The freezing compartment air duct 6 is arranged on the back side of the refrigerator cabinet body 1, and includes a freezing compartment air - supply duct 601, a freezing compartment air - return duct 602, a freezing compartment fan 603, a freezing compartment air - return duct air damper 604 and an air damper 605 between the refrigerating compartment air - supply duct and the freezing compartment air - supply duct.

[0034] For a refrigerator with a single - system multi - cycle air duct, the evaporator 2 is arranged on the back side of the cabinet body 1 and is separated by a partition 3 into an evaporator refrigerating area 201 for the refrigerator and an evaporator freezing area 202. The partition 3 is made of an aluminum plate or a copper plate and is tightly connected to the back plate of the freezing compartment air duct and the inner liner of the box body, playing a role in isolating the return air flows of the evaporator refrigerating area 201 and the evaporator freezing area 202.

[0035] For a refrigerator with a single - system multi - cycle air duct, if the volume of the refrigerating compartment 101 is 300L and the volume of the freezing compartment 102 is 150L, then the area ratio of the evaporator refrigerating area 201 and the freezing area 202 is: Where A is the area of the region, v is the volume factor of the compartment, the subscript 1 represents the refrigerating area, the subscript 2 represents the freezing area. When the volume of the compartment V < 100L, v takes 0.2; when 100L < V < 200L, v takes 0.3; when V > 200L, v takes 0.5. Therefore,

[0036] For a refrigerator with a single - system multi - cycle air duct, the compressor 4 is arranged at the bottom of the back side of the refrigerator cabinet body 1, and a fixed - frequency compressor or a variable - frequency compressor can be selected. When a variable - frequency compressor is selected, the compressor has a first gear (4000 rpm) with the highest speed, a second gear (2500 rpm) with a relatively high speed and a third gear (1400 rpm) with the lowest speed.

[0037] A single-system multi-cycle air duct refrigerator, wherein the refrigerating compartment air duct 5 is communicated with the refrigerating compartment 101 to form a refrigerating compartment air-cooling circulation loop. The refrigerating compartment air-cooling circulation loop circulates for refrigeration according to the temperature control rule of the refrigerating compartment 101. The temperature of the refrigerating compartment 101 is set to 5°C, and the temperature control deviation is ±2°C. When the temperature of the refrigerating compartment 101 is higher than 7°C, the refrigerating compartment air-cooling circulation loop starts to circulate for refrigeration. When the temperature of the refrigerating compartment 101 is lower than 3°C, the refrigerating compartment air-cooling circulation loop stops circulating for refrigeration.

[0038] A single-system multi-cycle air duct refrigerator, wherein the freezing compartment air duct 6 is communicated with the freezing compartment 102 to form a freezing compartment air-cooling circulation loop. The freezing compartment air-cooling circulation loop circulates for refrigeration according to the temperature control rule of the freezing compartment 102. The temperature of the freezing compartment 102 is set to -18°C, and the temperature control deviation is ±2°C. When the temperature of the freezing compartment 102 is higher than -16°C, the freezing compartment air-cooling circulation loop starts to circulate for refrigeration. When the temperature of the freezing compartment 102 is lower than -20°C, the freezing compartment air-cooling circulation loop stops circulating for refrigeration.

[0039] A single-system multi-cycle air duct refrigerator, wherein the damper 504 of the refrigerating compartment air supply duct, the damper 604 of the freezing compartment return air duct, and the damper 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct are of the electric type and can achieve an opening adjustment of 0% or 100%.

[0040] A working method of a single-system multi-cycle air duct refrigerator. When the refrigerating compartment air-cooling circulation loop and the freezing compartment air-cooling circulation loop circulate for refrigeration simultaneously, the refrigerating compartment fan 503 is turned on, the damper 504 of the refrigerating compartment air supply duct is turned on, the freezing compartment fan 603 is turned on, the damper 604 of the freezing compartment return air duct is closed, and the damper 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct is closed. When the compressor 4 is a fixed-frequency compressor, the compressor starts to run. When the compressor 4 is a variable-frequency compressor, the compressor starts to run at the first gear (4000 rpm).

[0041] A working method of a single-system multi-cycle air duct refrigerator. When only the refrigerating compartment air-cooling circulation loop circulates for refrigeration, the refrigerating compartment fan 503 is turned on, the damper 504 of the refrigerating compartment air supply duct is turned on, the freezing compartment fan 603 is turned off, the damper 604 of the freezing compartment return air duct is closed, and the damper 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct is closed. When the compressor 4 is a fixed-frequency compressor, the compressor starts to run. When the compressor 4 is a variable-frequency compressor, the compressor starts to run at the third gear (1400 rpm).

[0042] A working method of a refrigerator with a single-system multi-circulation air duct. When only the air-cooled circulation loop of the freezer compartment circulates for refrigeration, the fan 503 of the refrigerating compartment is closed, the air supply duct damper 504 of the refrigerating compartment is closed, the fan 603 of the freezer compartment is turned on, the return air duct damper 604 of the freezer compartment is opened, and the damper 605 between the air supply duct of the refrigerating compartment and the air supply duct of the freezer compartment is opened. When the compressor 4 is a fixed-frequency compressor, the compressor starts to operate. When the compressor 4 is a variable-frequency compressor, the compressor starts to operate at the second gear (2500 rpm).

[0043] A working method of a refrigerator with a single-system multi-circulation air duct. When both the air-cooled circulation loops of the refrigerating compartment and the freezer compartment stop circulating for refrigeration, the fan 503 of the refrigerating compartment is closed, the fan 603 of the freezer compartment is closed, and the compressor 4 stops operating.

[0044] For a refrigerator with a single-system multi-circulation air duct and its working method according to the present invention, the refrigerator cabinet body includes two or more compartments using the above-mentioned circulation air duct design, which all fall within the scope protected by the present invention.

Claims

1. A refrigerator with a single-system multi-loop air duct, characterized in that, Comprising: A refrigerator cabinet (1), the refrigerator cabinet (1) including a refrigerating compartment (101) and a freezing compartment (102); An evaporator (2), the evaporator (2) being disposed on the back side of the refrigerator cabinet (1) and being separated by a partition (3) into an evaporator refrigerating area for the refrigerating compartment (201) and an evaporator refrigerating area for the freezing compartment (202); A compressor (4), the compressor (4) being disposed at the bottom of the back side of the refrigerator cabinet (1); A refrigerating compartment air duct (5), the refrigerating compartment air duct (5) being disposed on the back side of the refrigerator cabinet (1) and including a refrigerating compartment air supply duct (501), a refrigerating compartment air return duct (502), a refrigerating compartment fan (503), and a refrigerating compartment air supply duct air door (504); The refrigerating compartment air duct (5) communicates with the refrigerating compartment (101) to form a refrigerating compartment air-cooled circulation loop, and the refrigerating compartment air-cooled circulation loop circulates for refrigeration according to the temperature control rule of the refrigerating compartment (101). When the temperature of the refrigerating compartment (101) is higher than the upper limit of the specified temperature control range, the refrigerating compartment air-cooled circulation loop starts to circulate for refrigeration. When the temperature of the refrigerating compartment (101) is lower than the lower limit of the specified temperature control range, the refrigerating compartment air-cooled circulation loop stops circulating for refrigeration; A freezing compartment air duct (6), the freezing compartment air duct (6) being disposed on the back side of the refrigerator cabinet (1) and including a freezing compartment air supply duct (601), a freezing compartment air return duct (602), a freezing compartment fan (603), a freezing compartment air return duct air door (604), and an air door (605) between the refrigerating compartment air supply duct and the freezing compartment air supply duct; The freezing compartment air duct (6) communicates with the freezing compartment (102) to form a freezing compartment air-cooled circulation loop, and the freezing compartment air-cooled circulation loop circulates for refrigeration according to the temperature control rule of the freezing compartment (102). When the temperature of the freezing compartment (102) is higher than the upper limit of the specified temperature control range, the freezing compartment air-cooled circulation loop starts to circulate for refrigeration. When the temperature of the freezing compartment (102) is lower than the lower limit of the specified temperature control range, the freezing compartment air-cooled circulation loop stops circulating for refrigeration; The calculation method for the areas of the evaporator's refrigerated refrigeration area (201) and the evaporator's frozen refrigeration area (202) is as follows: Among them, A is the area of the region, v is the volume factor of the compartment. The subscript 1 represents the evaporator's refrigerated refrigeration area, and the subscript 2 represents the evaporator's frozen refrigeration area. When the compartment volume V < 100L, v takes 0.2; when 100L < V < 200L, v takes 0.3; when V > 200L, v takes 0.

5.

2. The refrigerator with a single-system multi-circulation air duct according to claim 1, wherein The partition (3) is made of an aluminum plate or a copper plate and is tightly connected to the back plate of the freezing compartment air duct and the inner liner of the box body, and functions to isolate the return air flows of the evaporator refrigerating area for the refrigerating compartment (201) and the evaporator refrigerating area for the freezing compartment (202).

3. The refrigerator with a single-system multi-loop air duct according to claim 1, characterized in that, The compressor (4) is a fixed-frequency compressor or a variable-frequency compressor. When a variable-frequency compressor is selected, the compressor is provided with a first gear at the highest speed, a second gear at a relatively high speed, and a third gear at the lowest speed.

4. The refrigerator with a single-system multi-circulation air duct according to claim 1, characterized in that, The refrigerating compartment air supply duct air door (504), the freezing compartment air return duct air door (604), and the air door (605) between the refrigerating compartment air supply duct and the freezing compartment air supply duct are of the electric type and can achieve an opening adjustment of 0% or 100%.

5. The working method of a refrigerator with a single-system multi-cycle air duct according to any one of claims 1 to 4, characterized in that, When the air-cooled circulation circuits of both the refrigerated compartment and the frozen compartment are circulating for refrigeration simultaneously, the fan (503) of the refrigerated compartment is turned on, the air supply duct damper (504) of the refrigerated compartment is opened, the fan (603) of the frozen compartment is turned on, the return air duct damper (604) of the frozen compartment is closed, and the damper (605) between the air supply duct of the refrigerated compartment and the air supply duct of the frozen compartment is closed. When the compressor (4) is a fixed-frequency compressor, the compressor starts to operate. When the compressor (4) is a variable-frequency compressor, the compressor starts to operate at the first gear; When only the air-cooled circulation circuit of the refrigerated compartment is circulating for refrigeration, the fan (503) of the refrigerated compartment is turned on, the air supply duct damper (504) of the refrigerated compartment is opened, the fan (603) of the frozen compartment is turned off, the return air duct damper (604) of the frozen compartment is closed, and the damper (605) between the air supply duct of the refrigerated compartment and the air supply duct of the frozen compartment is closed. When the compressor (4) is a fixed-frequency compressor, the compressor starts to operate. When the compressor (4) is a variable-frequency compressor, the compressor starts to operate at the third gear; When only the air-cooled circulation circuit of the frozen compartment is circulating for refrigeration, the fan (503) of the refrigerated compartment is turned off, the air supply duct damper (504) of the refrigerated compartment is closed, the fan (603) of the frozen compartment is turned on, the return air duct damper (604) of the frozen compartment is opened, and the damper (605) between the air supply duct of the refrigerated compartment and the air supply duct of the frozen compartment is opened. When the compressor (4) is a fixed-frequency compressor, the compressor starts to operate. When the compressor (4) is a variable-frequency compressor, the compressor starts to operate at the second gear; When the air-cooled circulation circuits of both the refrigerated compartment and the frozen compartment stop circulating for refrigeration, the fan (503) of the refrigerated compartment is turned off, the fan (603) of the frozen compartment is turned off, and the compressor (4) stops operating.

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