A refrigerator
By designing a shared refrigeration air duct system and air duct structure in the refrigerator, the problem of cold distribution in the multi-temperature refrigerator is solved, and the effect of reducing costs and noise is achieved, while improving the temperature control accuracy.
Patent Information
- Application Number
- CN202010138448.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-03-03
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2040-03-03
AI Technical Summary
The existing multi-temperature large-volume refrigerators have a wide temperature adjustable range of the converter greenhouse, resulting in a wide range of cooling capacity requirements, making it difficult to achieve accurate temperature control in each temperature zone, and independent air duct systems increase noise and material costs.
Design a refrigerator, the freezer, the refrigerator and the greenhouse share a cooling air duct circulation system. By setting up a centrifugal fan and the main circulation air duct cavity in front of the evaporator chamber, four partitions are used to divide the air ducts into the freezer chamber and The cross-sectional area of the transformed greenhouse air duct is greater than that of the freezer air duct, and the air volume is adjusted in combination with the damper to achieve temperature control.
The three chambers share an evaporator and fan, which reduces material costs and noise, and improves the effective volume and temperature control accuracy of the refrigerator.
Smart Images
Figure CN111306865B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of refrigerators, and in particular to a large-volume air-cooled refrigerator with a variable temperature chamber. Background Art
[0002] At present, the typical large-volume multi-temperature zone refrigerator on the market has a freezer, a refrigerator and a variable temperature chamber. The temperature of the variable temperature chamber can be adjusted within a certain range. For example, it can be switched between the freezing temperature range and the refrigeration temperature range as needed, that is, it can be used as a freezer or refrigerator as needed. Alternatively, the temperature in the variable temperature chamber can be set at -3°C to 2°C (called the ice temperature zone), so that food can be better preserved and easily divided. Therefore, refrigerators with variable temperature chambers are increasingly favored by users. For large refrigerators with multiple temperature zones and multiple compartments, the control of the cold distribution of each temperature zone is a difficult point. For refrigerators with variable temperature chambers, it undoubtedly brings great challenges to refrigerator design. Since the temperature of the variable temperature chamber can be adjusted in a wide range, the range of its cooling demand is also wide. In order to achieve precise temperature control of both the variable temperature chamber and the cold storage chamber, existing multi-temperature zone large-volume refrigerators usually separate the refrigeration air duct system of the cold storage chamber from the air duct systems of the other two chambers to form two independently operated air duct systems, each equipped with two sets of evaporators and forced air fans. However, this increases the noise of the entire refrigerator, reduces the effective volume of the cold storage chamber, and at the same time, the material cost also rises. Summary of the invention
[0003] The object of the present invention is to provide a refrigerator in which a refrigerating chamber, a freezing chamber and a temperature-changing chamber share a set of refrigeration air duct circulation systems, thereby reducing the material cost of the product and increasing the effective volume of the refrigerator to overcome the shortcomings of the prior art.
[0004] The technical solution to the technical problem solved by the present invention is: a refrigerator, the refrigerator body is divided into a freezer compartment and a refrigerating compartment located at the top and arranged on the left and right, and a variable temperature chamber located at the bottom, an evaporator bin is arranged at the back of the freezer compartment, and a main circulation air duct cavity is arranged in front of the evaporator bin, characterized in that a centrifugal fan is arranged on the main circulation air duct cavity, an air duct sink cavity is arranged on one side of the top of the main circulation air duct cavity, an air outlet for supplying air to the refrigerating compartment is arranged on the side wall of the air duct sink cavity, the main circulation air duct cavity also includes a freezer compartment air duct and a variable temperature chamber air duct, and the cross-sectional area of the variable temperature chamber air duct is larger than the cross-sectional area of the freezer compartment air duct.
[0005] The main circulation air duct cavity includes a main circulation air duct plate, the top of the main circulation air duct plate is an air guide area, the air duct sink cavity is located in the air guide area, a fan hole is arranged in the air guide area corresponding to the installation position of the centrifugal fan, four partitions are arranged on the main circulation air duct plate to form a variable temperature chamber air duct in the middle, and left and right freezer air ducts on both sides of the variable temperature chamber air duct.
[0006] The upper end of the first partition plate among the four partition plates extends all the way to the top of the main circulation air duct plate, and the upper end of the first partition plate is provided with a protruding section bent toward the centrifugal fan. The upper ends of the remaining three partition plates extend toward the centrifugal fan and are spaced a distance from the outer circle of the centrifugal fan.
[0007] When the fourth plate extends vertically upward to approach the air duct sink cavity, the upper end of the fourth plate bends and extends toward the centrifugal fan until it approaches the outer circle of the centrifugal fan. When the third plate extends vertically upward to the air guide area, the upper end of the third plate bends and extends toward the center of the centrifugal fan until it approaches the outer circle of the centrifugal fan. The entrances of the freezer air duct and the variable temperature room air duct are distributed around the outer circle of the centrifugal fan.
[0008] The upper part of the main circulation air duct plate protrudes toward the evaporator bin, so that the depth of the air guide area of the main circulation air duct cavity is greater than the depth of other areas of the main circulation air duct cavity.
[0009] A refrigerating chamber air duct assembly is arranged on the top of the refrigerating chamber, a refrigerating chamber air duct cavity is arranged in the insulating foam layer between the refrigerating chamber and the freezing chamber, the refrigerating chamber air duct cavity connects the air duct sink cavity and the refrigerating chamber air duct assembly, and the refrigerating chamber air duct assembly includes a refrigerating chamber air duct plate and its cover plate, and a refrigerating chamber air duct liner.
[0010] A first air door is arranged in the air duct cavity of the refrigerating chamber.
[0011] An L-shaped air duct is arranged at the back of the refrigerating chamber air duct plate.
[0012] The beneficial effects of the present invention are:
[0013] The present invention sets up an evaporator bin at the back of the freezer, and transports the low-temperature air of the evaporator bin to three air ducts of freezing, refrigeration and variable temperature chambers through a centrifugal fan at the top, wherein the air duct system of the refrigeration chamber passes through the bubble layer between freezing and refrigeration, the air path is short, and the cold air can quickly reach the top of the refrigeration chamber, thereby ensuring the cold supply of the refrigeration chamber, the air supply duct of the variable temperature chamber extends vertically downward from the top of the freezer, and is located between the two freezing sub-ducts, the cross-sectional area of the variable temperature chamber duct is much larger than the refrigeration and freezing ducts, and the air volume per unit cross-sectional area is increased to ensure that the variable temperature chamber can meet the freezing requirements. At the same time, a damper is set on the variable temperature chamber duct, and the air volume is adjusted by the damper, so that the variable temperature chamber can adjust the temperature within a wider range. The three compartments of the refrigerator of the present invention share one evaporator and one centrifugal fan to achieve temperature control within the interval, and through reasonable air duct design, the product material cost is reduced, the effective volume of the refrigerator is increased, and the noise of the whole machine is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the box structure of the refrigerator of the present invention.
[0015] Figure 2 yes Figure 1 AA cross-sectional view of .
[0016] Figure 3 yes Figure 1 BB cross-section diagram.
[0017] Figure 4 It is a schematic diagram of the inner structure of the refrigerator of the present invention.
[0018] Figure 5 It is a structural schematic diagram of the air guide cavity at the top of the refrigerator body of the present invention.
[0019] Figure 6 It is a schematic diagram of the structure of the main circulation air duct plate of the refrigerator of the present invention.
[0020] Figure 7 It is a schematic diagram of the structure of the air duct plate of the refrigerator compartment of the refrigerator of the present invention (front view).
[0021] Figure 8 It is a schematic diagram of the structure of the air duct plate of the refrigerator compartment of the refrigerator of the present invention (back side).
[0022] Fig. 9 It is a schematic diagram of the structure of the upper air duct plate of the refrigerator of the present invention (front view).
[0023] Fig.10 It is a schematic diagram of the structure of the upper air duct plate of the refrigerator of the present invention (back side).
[0024] Fig.11 It is a schematic diagram of the structure of the downwind duct plate of the refrigerator of the present invention (front view).
[0025] Fig.12 It is a schematic diagram of the structure of the lower air duct plate of the refrigerator of the present invention (back side).
[0026] Fig.13 It is a schematic diagram of the air guide design principle of the refrigerator of the present invention.
[0027] Fig.14 yes Figure 3 Enlarged view of part E. DETAILED DESCRIPTION
[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. 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.
[0029] In the description of the present invention, it should be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.
[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection. It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0031] See also Figure 1-14 The present invention discloses a refrigerator, including a box body and a door body. The space in the box body is divided into a freezer compartment 1 and a refrigerator compartment 2 located at the top and arranged on the left and right, and a variable temperature chamber 3 located at the bottom. The door body includes a freezer compartment door, a refrigerator compartment door, and a variable temperature chamber drawer door. The freezer compartment door and the refrigerator compartment door are double-leaf doors, and the variable temperature chamber drawer door is a sliding door. The drawer door and the variable temperature chamber drawer are linked by a structural member. When the drawer door is opened, the variable temperature chamber drawer can be pulled out together. An evaporator bin 13 is arranged at the back of the freezer compartment, and an evaporator 4 is installed at the lower part of the evaporator bin 13. The evaporator bin is a cavity formed by the freezer compartment inner liner of the box body and the main circulation air duct plate. A main circulation air duct cover plate is arranged in front of the main circulation air duct plate. The main circulation air duct plate and the air duct cover plate surround a main circulation air duct cavity, and the main circulation air duct cavity can realize: 1. air supply to the refrigerator compartment; 2. air supply to the freezer compartment; 3. air supply to the variable temperature chamber. The main circulation air duct cavity is located in the interlayer between the evaporator bin and the inner cavity of the freezer compartment. In order to simplify the structure of the manufacturing mold and avoid the mold being too large, the main circulation air duct plate is divided into two parts, including an upper air duct plate 11 and a lower air duct plate 16, and the air duct cover plate is also divided into an upper air duct cover plate 12 and a lower air duct cover plate 17.
[0032] The evaporator bin 13 is arranged in the freezing chamber 1 and is located on the inner side of the rear wall of the freezing chamber box; the height and width of the evaporator bin 13 are roughly equal to the height and width of the freezing chamber box, and the evaporator 4 located in the evaporator bin 13 exchanges heat with the air to obtain cold air, and then transports the cold air to the freezing chamber 1, the cold storage chamber 2, and the variable temperature chamber 3 through the centrifugal fan. Since the refrigeration temperature of the freezing chamber 1 is relatively low, in order to ensure the refrigeration effect of the freezing chamber 1, the evaporator bin is arranged on the rear wall of the freezing chamber 1 close to the box, which can shorten the flow path of the cold air to the freezing chamber 1, thereby ensuring the refrigeration temperature of the freezing chamber 1.
[0033] The main circulation air duct plate is provided with a first heat insulation material layer 1101 in the area near the evaporator 4. The heat insulation material can be foam or sponge and other materials with the function of preventing heat transfer. The heat insulation material layer reduces the amount of cold transferred from the evaporator to the air duct cavity horizontally through the air duct plate, so as to avoid the low temperature of the evaporator from affecting the air supply temperature of the main circulation air duct cavity too much, so as to make the temperature control more accurate. Similarly, a second heat insulation material layer 121 is also provided on the partial back side (specifically the middle and lower part) of the upper air duct cover plate 12 and the back side of the lower air duct cover plate 17 to prevent the back wall temperature of the inner cavity of the freezer from being too low.
[0034] The top of the evaporator bin 13 is connected to the main circulation air duct cavity, and the cold air in the evaporator bin is sucked through the centrifugal fan 5. The bottom of the evaporator bin 13 is connected to the return air duct 8, and the return air duct 8 is connected to the inner cavity of the freezer compartment, the refrigerator compartment, and the variable temperature chamber, thereby realizing air circulation and heat exchange. The centrifugal fan 5 is fixedly installed on the back of the upper air duct cover plate through a bracket. A fan hole 119 is set at the upper part of the upper air duct plate 11 corresponding to the position of the centrifugal fan 5. The cold air in the evaporator bin 13 is sucked into the centrifugal fan 5 through the fan hole 119. The upper part of the upper air duct plate 11 is the air guide area, which needs to complete the task of distributing the cold air from the evaporator bin to the three compartments. Figure 2 , 310, the upper air duct plate 11 includes a fan assembly portion 110 and a vertical air duct portion 117. The fan assembly portion 110 and the vertical air duct portion 117 are not on the same plane. The air guide area (see the fan assembly portion 110) is sunken toward the evaporator bin than the lower air duct area (see the vertical air duct portion 117), so that the depth of the air guide area is greater than the air duct area. The back of the upper air duct plate 11 is provided with a mounting column 116 for its installation and positioning. There is a sunken sink 1 on the side of the freezer chamber near the refrigerator chamber. 4. The upper air duct plate 11 is provided with an air duct sinking cavity 15 on the upper side close to the refrigerating chamber. The air duct sinking cavity 15 is trapezoidal and consists of an opening, an inner end plane and four inclined side walls 115. The cross-sectional area of the sinking cavity opening is larger than the area of the inner end plane. A refrigerating chamber air duct opening 151 is provided on the side wall 115. A refrigerating chamber air duct cavity is provided in the insulating foam layer between the refrigerating chamber and the freezing chamber. The refrigerating chamber air duct cavity connects the air duct sinking cavity 15 and the refrigerating chamber air duct assembly, so that cold air enters the interior of the refrigerating chamber from the air guide area. The first panel 111, the second panel 112, the third panel 113, and the fourth panel 114 are vertically arranged on the upper duct plate 11 and the lower duct plate 16. The first panel 111 and the fourth panel 114 are respectively on the left and right sides. The free ends of the four panels directly contact the upper duct cover plate 12 or the lower duct cover plate 17, thereby dividing the duct cavity into the freezer duct 19 on the left and right sides and the variable temperature chamber duct 18 in the middle. The entrances of the three ducts are close to the outer circle of the centrifugal fan and are separated from the outer circle of the fan by a certain distance. To ensure that the variable temperature chamber has sufficient cooling capacity, the cross-sectional area of the variable temperature chamber duct 18 is greater than the sum of the cross-sectional areas of the left and right freezer ducts. The upper end of the first panel 111 extends all the way to the top of the upper duct plate and is provided with a protruding section 1111 that bends toward the centrifugal fan. The upper ends of the remaining three panels extend toward the direction of the centrifugal fan and maintain a certain distance from the outer circle of the centrifugal fan. Through the rotation of the centrifugal fan, the cold air flow is "thrown" out along the tangent of the outer circle of the centrifugal fan, see Fig.13, the fan airflow is "thrown" out along the tangent F direction, distributing the cold air to the freezer air duct 19 and the middle variable temperature air duct 18 and the air duct sink cavity 15. Moreover, in order to avoid the air duct sink cavity 15 and ensure that the freezer air duct has sufficient air volume, after the fourth panel 114 is vertically extended to the vicinity of the air duct sink cavity 15, its upper end 1141 bends and extends toward the center of the centrifugal fan until it approaches the outer circle of the centrifugal fan and keeps a distance. In order to avoid the upper end 1141 of the fourth panel, the upper end 1131 of the third panel 113 bends and extends toward the center of the centrifugal fan until it approaches the outer circle of the centrifugal fan and keeps a distance. That is, the inlets of the freezer air duct 19 and the middle variable temperature air duct 18 are distributed around the outer circle of the centrifugal fan. This matches the working characteristics of the centrifugal fan. When the wind of the centrifugal fan is thrown out along the tangent direction of its rotation, the air volume of the left and right air ducts of the freezer is basically the same. The above structure can better guide the cold air, which is beneficial to reducing fan noise and wind resistance, and secondly, it promotes more reasonable distribution of cooling capacity, which is beneficial to scientific temperature control and reducing the energy consumption of the whole machine.
[0035] A freezer chamber return air chamber 161 is arranged on the left and right sides below the lower air duct plate 16, and a variable temperature chamber air outlet 181 for sending cold air to the variable temperature chamber is arranged on the lower flange of the lower air duct plate 16, and a variable temperature chamber air duct cavity is arranged in the insulating bubble layer between the variable temperature chamber and the freezer chamber, and the variable temperature chamber air duct cavity connects the variable temperature chamber air outlet 181 and the variable temperature chamber air supply duct 31, so that cold air enters the variable temperature chamber from the air guide area through the variable temperature chamber air duct 18, the variable temperature chamber air outlet 181, the variable temperature chamber air duct cavity, the variable temperature chamber air supply duct 31, and the variable temperature chamber air outlet 32, and then returns to the evaporator bin 13 from the variable temperature chamber return air outlet 82.
[0036] The refrigerating chamber air duct assembly includes a refrigerating chamber air duct plate 22 and its cover plate, and a refrigerating chamber air duct 23 (made of lightweight foam material). A first damper 7 is arranged in the refrigerating chamber air duct cavity to adjust the air volume delivered to the refrigerating chamber. An L-shaped air duct 222 is arranged at the back of the refrigerating chamber air duct plate 22, so that the air supply direction is adjusted from horizontal to downward. The air inlet 221 of the L-shaped air duct 222 penetrates into the refrigerating chamber air duct cavity, and its air outlet 223 opens on the lower flange of the refrigerating chamber air duct plate 22.
[0037] The return air inlet of the refrigerating chamber is arranged near the freezing chamber, the return air inlet 81 of the freezing chamber is arranged at the lower bottom of the freezing chamber, and the return air inlet 82 of the variable temperature chamber is arranged near the lower part of the variable temperature chamber, and they are all connected with the return air duct 8.
[0038] The working process of the freezer compartment 1 is as follows: after the evaporator located in the evaporator compartment exchanges heat with the air, under the action of the centrifugal fan, the cold air flows along the air outlet of the evaporator compartment and into the two branch air ducts of the freezer compartment through the wind distribution area, and then enters the freezer compartment through the air outlet of each freezer compartment to cool each layer of the freezer compartment, and then returns to the evaporator compartment through the return air outlet of the freezer compartment.
[0039] The working process of the cold storage room 2 is as follows: after the evaporator located in the evaporator bin exchanges heat with the air, under the action of the centrifugal fan, the cold air flows along the air outlet of the evaporator bin and into the side air duct of the cold storage room through the wind distribution area, and then enters the cold storage air duct in the cold storage room, and then enters the cold storage room through the air outlet of each cold storage room to cool each layer of the cold storage room, and then returns to the evaporator bin through the return air outlet of the cold storage room.
[0040] The working process of the variable temperature chamber 3 is as follows: after the evaporator 4 located in the evaporator bin 13 exchanges heat with the air, under the action of the centrifugal fan, the cold air flows along the air outlet of the evaporator bin 13 and into the variable temperature chamber air duct 18 through the air guide area, and then enters the variable temperature chamber 3 through the variable temperature chamber air outlet 32 to cool the variable temperature chamber 3, and the air volume can be adjusted by the variable temperature chamber damper 6 to adjust the temperature in the variable temperature chamber 3, so as to switch the temperature of the variable temperature chamber 3 between the refrigeration temperature, the soft refrigeration temperature and the freezing temperature. The airflow after heat exchange in the variable temperature chamber 3 then passes through the variable temperature chamber return air outlet 82 and the return air duct 8 in turn into the bottom of the evaporator bin 13, and then exchanges heat through the evaporator 4.
[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents. Any improvements not made through creative work shall be included within the scope of protection of the present invention.
Claims
1. A refrigerator, wherein the refrigerator body is divided into a freezing chamber and a refrigerating chamber located at the top and arranged on the left and right, and a temperature-changing chamber located at the bottom, an evaporator bin is arranged at the back of the freezing chamber, and a main circulation air duct cavity is arranged in front of the evaporator bin, characterized in that: A centrifugal fan is arranged on the main circulation air duct cavity, a duct sink cavity is arranged on one side of the top of the main circulation air duct cavity, an air outlet for supplying air to the cold storage chamber is arranged on the side wall of the duct sink cavity, the main circulation air duct cavity also includes a freezer chamber air duct and a variable temperature chamber air duct, the cross-sectional area of the variable temperature chamber air duct is larger than the cross-sectional area of the freezer chamber air duct; the main circulation air duct cavity includes a main circulation air duct plate, the top of the main circulation air duct plate is an air guide area, the air duct sink cavity is located in the air guide area, a fan hole is arranged in the air guide area corresponding to the installation position of the centrifugal fan, four partitions are arranged on the main circulation air duct plate to form a variable temperature chamber air duct in the middle, and left and right partitions on both sides of the variable temperature chamber air duct , right freezer air duct; the upper end of the first partition plate among the four partition plates extends all the way to the top of the main circulation air duct plate, and the upper end of the first partition plate is provided with a protruding section bent toward the centrifugal fan, and the upper ends of the remaining three partition plates extend toward the centrifugal fan and are spaced a distance from the outer circle of the centrifugal fan; when the fourth partition plate extends vertically upward to approach the air duct sink cavity, the upper end of the fourth partition plate bends and extends toward the centrifugal fan until it approaches the outer circle of the centrifugal fan, and when the third partition plate extends vertically upward to the air guide area, the upper end of the third partition plate bends and extends toward the center of the centrifugal fan until it approaches the outer circle of the centrifugal fan, and the entrances of the freezer air duct and the variable temperature room air duct are distributed around the outer circle of the centrifugal fan.
2. The refrigerator according to claim 1, characterized in that: The upper part of the main circulation air duct plate protrudes toward the evaporator bin, so that the depth of the air guide area of the main circulation air duct cavity is greater than the depth of other areas of the main circulation air duct cavity.
3. The refrigerator according to claim 2, characterized in that: A refrigerating chamber air duct assembly is arranged on the top of the refrigerating chamber, a refrigerating chamber air duct cavity is arranged in the insulating foam layer between the refrigerating chamber and the freezing chamber, the refrigerating chamber air duct cavity connects the air duct sink cavity and the refrigerating chamber air duct assembly, and the refrigerating chamber air duct assembly includes a refrigerating chamber air duct plate and its cover plate, and a refrigerating chamber air duct liner.
4. The refrigerator according to claim 3, characterized in that: A first air door is arranged in the air duct cavity of the refrigerating chamber.
5. The refrigerator according to claim 4, characterized in that: An L-shaped air duct is arranged at the back of the refrigerating chamber air duct plate.