Refrigerator with single system and multiple circulating air paths and working method of refrigerator

Abstract

The invention discloses a single-system multi-circulation-air-path refrigerator and a working method thereof, the system comprises a refrigerator cabinet body, and the refrigerator cabinet body comprises a refrigeration chamber and a freezing chamber; the multi-circulation air path comprises a refrigeration chamber air cooling circulation air path and a freezing chamber circulation air path; a fan is arranged on each of the two circulating air paths; the evaporator is divided into two areas by a partition plate, and each area is communicated with the circulating air path of each chamber; a compressor; the air doors are mounted on the refrigerating chamber air supply duct, the freezing chamber air return duct and between the refrigerating chamber air supply duct and the freezing chamber air supply duct; airflow separation of the refrigerating chamber circulating air path and the freezing chamber circulating air path is realized by controlling actions of the fan, the air door and the compressor; according to the refrigerator with the single system and the multiple circulation air paths, refrigeration of multiple room temperature areas can be achieved only through one evaporator, and it is guaranteed that all the rooms are not tainted by other odor. Compared with an existing refrigerator with a double-evaporator system, the refrigerator has the advantages of being compact in structure, easy to produce and install and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a refrigerator with a single system and multiple circulation air paths and a working method thereof. Technical Background

[0002] Under the existing refrigerator refrigeration technology conditions, there are two main technologies for achieving multi-compartment multi-temperature zone refrigeration: the first is to use a dual evaporator circulation refrigeration system, which includes multiple evaporators and compressors and has a high temperature control accuracy, as shown in patent CN202411168970.2. However, the structure of the refrigerator using this technology is usually more complicated, and the connection structure between the evaporators needs to be welded during installation. The welding process is difficult, which may cause installation difficulties and affect the operating efficiency of the refrigerator. At the same time, the refrigerator structure of the dual circulation system is not as compact as 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, add a cold storage compartment, and use the cold conduction plate of the cold storage compartment to realize the heat exchange of the airflow of each compartment and the airflow separation refrigeration of each compartment, as shown in patent CN202410966772.4. This technology can effectively separate the return airflow of each compartment, but the heat transfer efficiency of the insulation board is low.

[0003] Therefore, it is necessary to propose a refrigerator solution that can separate the airflow of each compartment and prevent odor contamination on a single evaporator system. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a single-system multi-circulation air path refrigerator and a working method thereof, aiming to solve the problems of difficult installation of dual evaporators in dual-circulation refrigerators and easy odor contamination of single evaporators in the prior art.

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

[0006] A refrigerator with a single system and multiple circulation air paths, comprising:

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

[0008] The evaporator 2 is arranged on the back side of the refrigerator cabinet 1 and is divided into an evaporator refrigeration area 201 and an evaporator freezing area 202 by a partition 3;

[0009] A compressor 4, wherein 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 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 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 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 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 plate 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 damper 504 of the refrigerating compartment air supply duct, the damper 604 of the freezing compartment air return duct, and the damper 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct are electrically operated and can realize 0% or 100% opening adjustment.

[0018] The working method of the refrigerator with a single system and multiple circulation air paths is as follows: when the refrigerating compartment air cooling circulation loop and the freezing compartment air cooling circulation loop circulate and refrigerate at the same time, the refrigerating compartment fan 503 is turned on, the refrigerating compartment air supply duct damper 504 is turned on, the freezing compartment fan 603 is turned on, the freezing compartment return air duct damper 604 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;

[0019] When only the refrigerating compartment air cooling loop circulates and refrigerates, the refrigerating compartment fan 503 is turned on, the refrigerating compartment air supply duct damper 504 is turned on, the freezing compartment fan 603 is turned off, the freezing compartment return air duct damper 604 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.

[0020] When only the air-cooling circulation loop of the freezer compartment circulates for refrigeration, the refrigerating compartment fan 503 is turned off, the damper 504 of the refrigerating compartment air supply duct is closed, the refrigerating compartment fan 603 is turned on, the damper 604 of the refrigerating compartment return air duct is turned on, and the damper 605 between the refrigerating compartment air supply duct and the refrigerating compartment air supply duct is turned on. 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 second gear.

[0021] When the refrigerating compartment air cooling circulation circuit and the freezing compartment air cooling circulation circuit both stop circulating and cooling, the refrigerating compartment fan 403 is turned off, the freezing compartment fan 503 is turned off, and the compressor 4 stops running.

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

[0023] (1) The single-system multi-circulation air path refrigerator proposed by the present invention can realize independent refrigeration of multiple compartments with only one evaporator. The refrigeration airflow of each compartment is independent of each other, which effectively prevents the phenomenon of food odor mixing, thereby achieving a better food storage effect.

[0024] (2) The single-system multi-circulation air path refrigerator proposed by the present invention is designed with only one evaporator, which has the advantages of better sealing, easier installation and lower production cost than the current multi-evaporator system that can achieve multi-compartment airflow separation refrigeration. In addition, due to its more compact structure, the effective volume of the refrigerator can be increased.

[0025] (3) The working method of a single-system multi-circulation air path refrigerator proposed by the present invention has multiple working modes. The damper opening and closing and the compressor frequency are controlled according to the circulation state of the separated airflow, so as to achieve precise control of the compartment temperature and avoid the waste of cooling capacity of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a refrigerator cabinet with a single system and multiple circulation air paths provided by the present invention.

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

[0028] Figure 3 A schematic diagram of the damper structure and evaporator partitioning between the refrigerating compartment air supply duct and the freezing compartment air supply duct of a single-system multi-circulation air path refrigerator provided by the present invention.

[0029] In the figure: 1. refrigerator cabinet; 101. cold storage compartment; 102. freezer compartment; 2. evaporator; 201. evaporator cold storage and refrigeration area; 202. evaporator cold storage and refrigeration area; 3. partition; 4. compressor; 5. cold storage compartment air duct; 501. cold storage compartment supply air duct; 502. cold storage compartment return air duct; 503. cold storage compartment fan; 504. cold storage compartment supply air duct damper; 6. freezer compartment air duct; 601. freezer compartment supply air duct; 602. freezer compartment return air duct; 603. freezer compartment fan; 604. freezer compartment return air duct damper; 605. damper between cold storage compartment supply air duct and freezer compartment supply air duct. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer and more concise, the present invention is further described in detail below in conjunction with 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] Example

[0032] The embodiments of the present invention are described in detail below, and 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 understood as limiting the present invention.

[0033] like Figure 1-Figure 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, which is arranged on the back side of the refrigerator cabinet body 1 and is separated into an evaporator refrigerating area 201 for the refrigerating compartment and an evaporator refrigerating area 202 for the freezing compartment by a partition plate 3. A compressor 4, which is arranged at the bottom of the back side of the refrigerator cabinet body 1 and can be a fixed - frequency compressor or a variable - frequency compressor. A refrigerating compartment air duct 5, which 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 door 504. A freezing compartment air duct 6, which 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 door 604, and an air door 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 into an evaporator refrigerating area 201 for the refrigerating compartment and an evaporator refrigerating area 202 for the freezing compartment by a partition plate 3. The partition plate 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 for the refrigerating compartment and the evaporator refrigerating area 202 for the freezing compartment.

[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 for the refrigerating compartment and the evaporator refrigerating area 202 for the freezing compartment is: Where A is the area of the region, v is the volume factor of the compartment, the subscript 1 represents the refrigerating area, and 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 can be a fixed - frequency compressor or a variable - frequency compressor. 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-circulation air path refrigerator, wherein the refrigerating compartment air duct 5 is connected to the refrigerating compartment 101 to form a refrigerating compartment air cooling circulation loop, wherein the refrigerating compartment air cooling circulation loop circulates and flows 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 circulating and flowing refrigeration, and when the temperature of the refrigerating compartment 101 is lower than 3°C, the refrigerating compartment air cooling circulation loop stops circulating and flowing refrigeration.

[0038] A refrigerator with a single system and multiple circulation air paths, wherein the freezer compartment air duct 6 is connected to the freezer compartment 102 to form a freezer compartment air cooling circulation loop, wherein the freezer compartment air cooling circulation loop performs circulation flow refrigeration according to a temperature control rule of the freezer compartment 102, wherein the temperature of the freezer compartment 102 is set to -18°C, and the temperature control deviation is ±2°C, wherein when the temperature of the freezer compartment 102 is higher than -16°C, the freezer compartment air cooling circulation loop starts circulation flow refrigeration, and when the temperature of the freezer compartment 102 is lower than -20°C, the freezer compartment air cooling circulation loop stops circulation flow refrigeration.

[0039] A refrigerator with a single system and multiple circulation air paths, wherein the damper 504 of the refrigerating compartment air supply duct, the damper 604 of the freezing compartment air return duct, and the damper 605 between the refrigerating compartment air supply duct and the freezing compartment air supply duct are electrically operated and can realize 0% or 100% opening adjustment.

[0040] A working method of a refrigerator with a single system and multiple circulation air paths, when the refrigerating compartment air cooling circulation loop and the freezing compartment air cooling circulation loop circulate and refrigerate at the same time, the refrigerating compartment fan 503 is turned on, the refrigerating compartment air supply duct damper 504 is turned on, the freezing compartment fan 603 is turned on, the freezing compartment return air duct damper 604 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 (4000rpm).

[0041] A working method of a refrigerator with a single system and multiple circulation air paths, when only the refrigerating compartment air cooling circulation loop circulates and refrigerates, the refrigerating compartment fan 503 is turned on, the refrigerating compartment air supply duct damper 504 is turned on, the freezing compartment fan 603 is turned off, the freezing compartment return air duct damper 604 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 and multiple circulation air paths, when only the air cooling circulation loop of the freezer compartment circulates for refrigeration, the refrigerating compartment fan 503 is turned off, the damper 504 of the refrigerating compartment air supply duct is closed, the freezing compartment fan 603 is turned on, the damper 604 of the freezer compartment return air duct is turned on, and the damper 605 between the refrigerating compartment air supply duct and the freezer compartment air supply duct is turned on; 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 second gear (2500 rpm).

[0043] A working method of a refrigerator with a single system and multiple circulation air paths, when the refrigerating compartment air cooling circulation circuit and the freezing compartment air cooling circulation circuit both stop circulating and cooling, the refrigerating compartment fan 403 is turned off, the freezing compartment fan 503 is turned off, and the compressor 4 stops running.

[0044] The present invention provides a single-system multi-circulation air path refrigerator and a working method thereof. The refrigerator cabinet includes two or more compartments and adopts the above-mentioned circulation air path design, which all fall within the scope of protection of the present invention.

Claims

1. A refrigerator with a single system and multiple circulation air paths, characterized in that: include: A refrigerator cabinet (1), the refrigerator cabinet (1) comprising a refrigerating compartment (101) and a freezing compartment (102); An evaporator (2), the evaporator (2) being arranged on the back side of the refrigerator cabinet (1) and being divided into an evaporator refrigeration area (201) and an evaporator freezing area (202) by a partition (3); A compressor (4), the compressor (4) being arranged 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 arranged on the back side of the refrigerator cabinet (1), comprising 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 damper (504); The refrigerated compartment air duct (5) is connected to the refrigerated compartment (101) to form an air cooling circulation loop for the refrigerated compartment. The air cooling circulation loop for the refrigerated compartment circulates and cools according to a temperature control rule of the refrigerated compartment (101). When the temperature of the refrigerated compartment (101) is higher than an upper limit of a specified temperature control interval, the air cooling circulation loop for the refrigerated compartment starts circulating and cooling. When the temperature of the refrigerated compartment (101) is lower than a lower limit of the specified temperature control interval, the air cooling circulation loop for the refrigerated compartment stops circulating and cooling. A freezer compartment air duct (6), the freezer compartment air duct (6) being arranged on the back side of the refrigerator cabinet (1), comprising a freezer compartment air supply duct (601), a freezer compartment return air duct (602), a freezer compartment fan (603), a freezer compartment return air duct damper (604), and a damper (605) between the refrigeration compartment air supply duct and the freezer compartment air supply duct; The freezer compartment air duct (6) is in communication with the freezer compartment (102) to form a freezer compartment air cooling circulation loop. The freezer compartment air cooling circulation loop performs circulating flow cooling according to a temperature control rule of the freezer compartment (102). When the temperature of the freezer compartment (102) is higher than an upper limit of a specified temperature control interval, the freezer compartment air cooling circulation loop starts circulating flow cooling. When the temperature of the freezer compartment (102) is lower than a lower limit of the specified temperature control interval, the freezer compartment air cooling circulation loop stops circulating flow cooling.

2. A single-system multi-circulation air path refrigerator according to claim 1, characterized in that: The partition plate (3) is made of an aluminum plate or a copper plate and is tightly connected to the rear plate of the freezing compartment air duct and the box body, so as to isolate the return air flow of the evaporator cold storage and refrigeration area (201) and the evaporator freezing and refrigeration area (202).

3. The refrigerator with a single system and multiple circulation air paths according to claim 1, characterized in that: The calculation method for the areas of the evaporator's refrigerated cooling area (201) and the evaporator's frozen cooling area (202) is as follows: Where A is the area of the region, v is the volume factor of the compartment, the subscript 1 represents the evaporator's refrigerated cooling area, and the subscript 2 represents the evaporator's frozen cooling 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.

4. The refrigerator with a single system and multiple circulation air paths 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 with the highest speed, a second gear with a relatively high speed, and a third gear with the lowest speed.

5. The refrigerator with a single system and multiple circulation air paths according to claim 1, characterized in that: The damper (504) of the refrigerating compartment air supply duct, the damper (604) of the freezing compartment air return duct, and the damper (605) between the refrigerating compartment air supply duct and the freezing compartment air supply duct are electrically operated and can realize 0% or 100% opening adjustment.

6. The operating method of a refrigerator with a single system and multiple circulation air paths according to any one of claims 1 to 5, characterized in that: When the refrigerating compartment air cooling circulation circuit and the freezing compartment air cooling circulation circuit circulate and refrigerate at the same time, the refrigerating compartment fan (503) is turned on, the refrigerating compartment air supply duct damper (504) is turned on, the freezing compartment fan (603) is turned on, the freezing compartment return air duct damper (604) 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; When only the refrigerating compartment air cooling circuit circulates for refrigeration, the refrigerating compartment fan (503) is turned on, the refrigerating compartment air supply duct damper (504) is turned on, the freezing compartment fan (603) is turned off, the freezing compartment return air duct damper (604) is turned off, and the damper (605) between the refrigerating compartment air supply duct and the freezing compartment air supply duct is turned off; 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; When only the air cooling circuit of the freezing compartment circulates for refrigeration, the refrigerating compartment fan (503) is turned off, the damper (504) of the refrigerating compartment air supply duct is closed, the refrigerating compartment fan (603) is turned on, the damper (604) of the refrigerating compartment return air duct is turned on, and the damper (605) between the refrigerating compartment air supply duct and the freezing compartment air supply duct is turned on; 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 second gear; When the refrigerating compartment air cooling circulation circuit and the freezing compartment air cooling circulation circuit both stop circulating and cooling, the refrigerating compartment fan (403) is turned off, the freezing compartment fan (503) is turned off, and the compressor (4) stops running.

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