Refrigerator cold air duct device

Abstract

The application discloses a refrigerator refrigeration air duct device, which comprises a fan cover, an air duct foam installed in the fan cover, an air duct formed in the air duct foam, an air inlet formed at the bottom of the air duct foam, air outlet channels formed at both sides of the top of the air duct foam, a plurality of first air resistance parts vertically and separately arranged at the air outlet channels on the air duct foam, gaps between the first air resistance parts forming air outlets, the first air resistance parts at the top extending laterally to the inside, the end of the laterally extending first air resistance part being in a round angle shape, the bottom end and the top end of the laterally extending first air resistance part being arc-shaped, a fan arranged between the two air outlet channels, second air resistance parts symmetrically protruding on both sides of the fan on the air duct foam, a gap formed between the two second air resistance parts being communicated with the air duct, and the air discharged by the fan forming a Coanda effect with the air in the air duct through the second air resistance parts and the first air resistance parts.

Description

Technical Field

[0001] This invention relates to the field of refrigerator manufacturing technology, and specifically to a refrigerator refrigeration air duct device. Background Technology

[0002] The refrigerator's cooling air duct refers to the channel through which cold air circulates into the refrigerator compartment. Located between the freezer and refrigerator compartments, the cooling air duct uses a fan and air duct system to deliver cold air to the refrigerator compartment, maintaining the temperature inside the refrigerator compartment below room temperature. The cooling air duct is typically made of plastic or metal and has a certain degree of insulation to prevent cold air leakage or temperature loss.

[0003] The existing refrigerator cooling air duct structure is shown in the authorized patent: Air Duct Device and Refrigerator (Application No.: 2018220170009). This air duct device blows cold air from the freezer compartment into the refrigerator compartment. However, the long air intake path in the refrigerator compartment results in significant cold air loss, which can lead to insufficient cold air at the end of the air duct, causing the upper part of the refrigerator compartment to overheat and spoil food. Furthermore, the front air outlet of this device is easily blocked by food, preventing effective cooling of the refrigerator compartment. The inconsistent number and size of the front air outlets also significantly affect the product's appearance.

[0004] The existing refrigerator cooling air duct structure is described in the patent application: A dual-air duct cooling device and refrigerator with an electric damper (application number: 202211298107X). This air duct device blows cold air from the freezer compartment into the refrigerator compartment through the damper. However, the long airflow path in the refrigerator compartment results in significant cold air loss, easily leading to insufficient cold air at the end of the duct, causing excessively high temperatures in the upper part of the refrigerator compartment and spoilage of food. Furthermore, the damper is located at the bottom of the refrigerator air hood assembly, resulting in poor sealing reliability with the cabinet during assembly, easily leading to air leakage and significant quality problems such as damper icing and malfunction. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned above in the background art, and to propose a refrigerator refrigeration air duct device.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A refrigerator cooling air duct device, comprising:

[0008] Windproof cover;

[0009] A duct foam is installed inside the hood, forming a duct inside the duct foam. An air inlet is formed at the bottom of the duct foam, and air outlet channels are opened on both sides of the top of the duct foam. Multiple first wind-blocking parts are vertically spaced and protruding on the duct foam at the air outlet channels. The gaps between the multiple first wind-blocking parts form air outlets, and the first wind-blocking parts at the top extend laterally inward.

[0010] The first wind-blocking part, which extends laterally, has rounded corners at its ends, with both its bottom and top ends being arc-shaped.

[0011] A fan is disposed between the two air outlet channels. The air duct foam has symmetrically protruding second air-blocking parts on both sides of the fan. The gap formed between the two second air-blocking parts is connected to the air duct.

[0012] The air discharged from the fan interacts with the air in the duct through the second and first air chokes to form a Coanda effect.

[0013] As a further aspect of the present invention, the air duct is V-shaped.

[0014] As a further aspect of the present invention: the air outlet includes a first air outlet, a second air outlet and a third air outlet, wherein the first air outlet, the second air outlet and the third air outlet are arranged vertically from top to bottom in sequence.

[0015] As a further aspect of the present invention: the fan is located below the first air outlet.

[0016] As a further aspect of the present invention: the air inlet at the bottom of the air duct foam and the air outlet channels on both sides of the top of the air duct foam are both connected to the air duct.

[0017] As a further aspect of the present invention: the air inlet of the air duct foam is provided with an air duct foam cover, the air inlet includes a first air inlet and a second air inlet, and the air duct foam cover is also provided with a first opening and a second opening that cooperate with the first air inlet and the second air inlet.

[0018] As a further aspect of the present invention: a fourth air outlet is provided on the back of the fan cover, and the fourth air outlet is connected to the second air inlet.

[0019] As a further aspect of the present invention, a temperature sensing element is also provided on the wind shield.

[0020] The beneficial effects of this invention are:

[0021] This invention solves the problem of high temperature at the top of the existing cold storage compartment by adding a centrifugal fan and a flow guide channel at the top;

[0022] This invention addresses the risk of air outlets becoming clogged in existing structures by designing the air outlet on the side, while also resolving the appearance defects of existing structures, thereby enhancing product competitiveness.

[0023] This invention solves the major defect of existing air duct devices that cause icing due to poor sealing after assembly by placing the double air doors inside the foam layer of the refrigerator body.

[0024] The air duct device of the present invention utilizes the Coanda effect principle to increase the air intake from freezing to refrigeration, thereby achieving rapid cooling of the refrigeration compartment, reducing compressor start-up and shutdown time, reducing product power consumption, and enhancing product competitiveness. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the disassembled structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the air duct foam and air cover of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the air duct foam of the present invention;

[0029] Figure 4 This is a rear view structural diagram of the wind shield of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the air duct foam of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the air duct foam cover of the present invention;

[0032] Figure 7 This is a schematic diagram of the airflow direction of the present invention;

[0033] Figure 8 The arrows in the text indicate high-speed airflow;

[0034] Figure 9 The middle arrow indicates supplemental airflow.

[0035] In the diagram: 1. Fan cover; 11. Front cover; 12. Rear cover; 2. Air duct foam; 201. Air duct; 2011. First air inlet; 2012. Second air inlet; 2013. First air outlet; 2014. Second air outlet; 2015. Third air outlet; 3. Air duct foam cover; 31. First opening; 32. Second opening; 5. Fan; 6. Return air inlet; 7. Fourth air outlet; 8. Temperature sensing element. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1, please refer to Figure 1-2As shown, the present invention provides a refrigerating air duct device for a refrigerator, comprising:

[0038] a wind cover 1;

[0039] an air duct foam 2 installed in the wind cover 1, wherein a gap between the edge of the air duct foam 2 and the wind cover 1 is filled with a sealing sponge. The sealing sponge is a sealing material made of sponge material, which is generally used for filling or sealing gaps between objects to prevent the penetration or leakage of gas, liquid or impurities.

[0040] an air duct 201 is formed in the air duct foam 2, an air inlet is formed at the bottom of the air duct foam 2, and air outlet channels are provided at both sides of the top of the air duct foam 2. A plurality of first air blocking portions are protrudingly arranged at intervals vertically on the air duct foam 2 at the positions of the air outlet channels, and gaps between the plurality of first air blocking portions form air outlets. The first air blocking portion at the top extends transversely inward, the number of the first air blocking portions is at least two, and the number of the air outlets formed by the two first air blocking portions and the air duct foam 2 is three;

[0041] the end portion of the transversely extending first air blocking portion is rounded, and both the bottom end and the top end thereof are arc-shaped;

[0042] a fan 5 arranged between the two air outlet channels, the fan 5 may be a centrifugal fan, wherein second air blocking portions are symmetrically protruded on the air duct foam 2 at two sides of the fan 5, a gap formed between the two second air blocking portions communicates with the air duct 201, and the gap between the two second air blocking portions is in a shape of a Chinese character "tian";

[0043] the air discharged from the fan 5 and the air in the air duct 201 form the Coandă effect through the second air blocking portions and the first air blocking portions.

[0044] Embodiment 2, please refer to Figure 1-3 As shown, the present invention provides a refrigerating air duct device for a refrigerator, comprising:

[0045] a wind cover 1;

[0046] an air duct foam 2 installed in the wind cover 1, wherein a gap between the edge of the air duct foam 2 and the wind cover 1 is filled with a sealing sponge. The sealing sponge is a sealing material made of sponge material, which is generally used for filling or sealing gaps between objects to prevent the penetration or leakage of gas, liquid or impurities.

[0047] An air duct 201 is formed in the air duct foam 2, the air duct 201 is V-shaped, an air inlet is formed at the bottom of the air duct foam 2, and air outlet channels are provided on both sides of the top of the air duct foam 2. A plurality of first air blocking portions are protruded and vertically spaced apart on the air duct foam 2 at the position of the air outlet channels, gaps between the plurality of first air blocking portions form air outlets, the top first air blocking portion extends laterally inward, the number of the first air blocking portions is at least two, and the number of the air outlets formed by the two first air blocking portions and the air duct foam 2 is three. The air outlets include a first air outlet 2013, a second air outlet 2014 and a third air outlet 2015, and the first air outlet 2013, the second air outlet 2014 and the third air outlet 2015 are vertically arranged in sequence from top to bottom;

[0048] The end of the laterally extending first air blocking portion is rounded, and both the bottom end and the top end thereof are arc-shaped;

[0049] A fan 5 is arranged between the two air outlet channels, the fan 5 is located below the first air outlet 2013, and the fan 5 may be a centrifugal fan. Second air blocking portions are symmetrically protruded on the air duct foam 2 at two sides of the fan 5, a gap formed between the two second air blocking portions communicates with the air duct 201, and the gap between the two second air blocking portions is shaped like a Chinese character "tian";

[0050] The air discharged by the fan 5, the second air blocking portions, the first air blocking portions and the air in the air duct 201 form the Coanda effect.

[0051] For the third embodiment, please refer to Figure 1-6 as shown, the present invention provides a refrigerating air duct device for a refrigerator, comprising:

[0052] a wind shield 1;

[0053] the air duct foam 2 is installed in the wind shield 1, a sealing sponge is filled in a gap between the air duct foam 2 and an edge of the wind shield 1, and the sealing sponge is a sealing material made of a sponge material, which is generally used for filling or sealing gaps between objects to prevent the penetration or leakage of gas, liquid or impurities.

[0054] An air duct 201 is formed in the air duct foam 2, the shape of the air duct 201 is V-shaped, an air inlet is formed at the bottom of the air duct foam 2, air outlet channels are provided on both sides of the top of the air duct foam 2, a plurality of first wind blocking parts are protruded and arranged vertically at intervals at the position of the air outlet channels on the air duct foam 2, gaps between the plurality of first wind blocking parts form air outlets, the first wind blocking part at the top extends laterally inward, the number of the first wind blocking parts is at least two, the number of the air outlets formed by the two first wind blocking parts and the air duct foam 2 is three, the air outlets comprise a first air outlet 2013, a second air outlet 2014 and a third air outlet 2015, the first air outlet 2013, the second air outlet 2014 and the third air outlet 2015 are arranged vertically in sequence from top to bottom;

[0055] Both the air inlet at the bottom of the air duct foam 2 and the air outlet channels on both sides of the top of the air duct foam 2 are in communication with the air duct 201. An air duct foam cover 3 is provided at the air inlet of the air duct foam 2, the air inlet comprises a first air inlet 2011 and a second air inlet 2012, and the air duct foam cover 3 is also provided with a first opening 31 and a second opening 32 that cooperate with the first air inlet 2011 and the second air inlet 2012. A fourth air outlet 7 is provided at the back of the wind shield 1, and the fourth air outlet 7 is in communication with the second air inlet 2012.

[0056] The end of the laterally extending first wind blocking part is rounded, and both the bottom end and the top end thereof are arc-shaped;

[0057] A blower 5 is arranged between the two air outlet channels, the blower 5 is located below the first air outlet 2013, the blower 5 can be a centrifugal blower, second wind blocking parts are symmetrically protruded on the air duct foam 2 at two sides of the blower 5, a gap formed between the two second wind blocking parts is in communication with the air duct 201, and the gap between the two second wind blocking parts is in a shape of a Chinese character 'tian';

[0058] The air discharged by the blower 5, the air in the air duct 201, the second wind blocking parts and the first wind blocking parts form the Coanda effect.

[0059] Example four, based on example one, example two or example three, a temperature-sensitive member 8 is further provided on the wind shield 1. A temperature-sensitive member refers to a component that can perceive temperature changes and respond to them. In a refrigerator, the temperature-sensitive member generally refers to a temperature sensor, which is used for monitoring the temperature inside the refrigerating compartment or the freezing compartment. Temperature sensors can adopt different working principles, such as thermocouples, thermistors or semiconductor temperature sensors.

[0060] The temperature sensor converts the sensed temperature into a corresponding electrical signal, which is then transmitted to the control system via circuitry to control the refrigerator's cooling or heating operation. The control system adjusts parameters such as refrigerant flow rate and compressor operating time in the refrigerator or freezer compartment based on the temperature sensor signal to maintain the set temperature range.

[0061] It is important to note that:

[0062] Sealing foam is typically made of polymer foam materials, such as polyurethane foam and polyethylene foam. These materials have good elasticity and softness, and can be easily cut and formed into the required shapes and sizes. Sealing foam has the following characteristics and applications: Sealing performance: Sealing foam can fill the gaps between objects, effectively preventing the penetration or leakage of gases, liquids, and impurities. Cushioning and shock absorption: Due to its softness and elasticity, sealing foam can cushion and absorb shocks, protecting objects from external impacts and vibrations. Sound absorption and sound insulation: The porous structure of sealing foam can effectively absorb sound and isolate sound wave propagation, playing a role in sound absorption and sound insulation. Insulation performance: Some sealing foam materials have good insulation properties and can be used in fields such as electronics, electrical appliances, and communication equipment, playing a role in insulation and protection. Application areas: Sealing foam is widely used in automobiles, electronics, electrical appliances, construction, aerospace, medical equipment, and other fields to meet the needs of sealing, shock absorption, sound insulation, and insulation, thereby improving product performance and reliability.

[0063] Duct foam 2, also known as duct insulation foam, is an insulating material used in air conditioning and ventilation systems. It is typically made of closed-cell polymer foam, such as polyurethane foam and polyethylene foam.

[0064] Duct foam 2 has the following characteristics and applications: Insulation performance: Duct foam 2 has excellent insulation properties, effectively isolating temperature differences and sound transmission between the inside and outside of the duct, reducing energy loss and noise impact. Lightweight and flexible: Duct foam 2 is lightweight and flexible, allowing for easy cutting and installation into various duct shapes, providing excellent sealing and insulation. Heat and cold resistance: Duct foam 2 typically possesses certain heat and cold resistance properties, adapting to different working environments and temperature requirements. Flame retardant properties: Some duct foam 2 materials exhibit good flame retardant properties, reducing the risk of fire. Environmentally friendly and healthy: Duct foam 2 materials generally meet environmental standards and do not release harmful gases, posing no harm to human health. Application areas: Duct foam 2 is widely used in air conditioning and ventilation systems in fields such as construction, aerospace, automotive, electronics, and electrical appliances for heat insulation, sound insulation, and protection of ducts. It can reduce energy consumption, improve system efficiency, and provide a comfortable indoor environment.

[0065] The principle of heat exchange in the cold storage compartment: Hot air from the return air vent of the cold storage compartment is delivered to the lower part of the evaporator in the freezer compartment through the high and low pressure principle - heat exchange with the evaporator - drawn in by the refrigeration fan and output to the air inlet of this embodiment of the invention - cold air is divided into left and right channels through the guide protrusion and the inner wall of the channel - cold air is blown out from the air outlet of each layer - the hot air generated after heat exchange with the food on each layer is then drawn into the bottom of the freezer compartment through the return air vent, and so on to complete the complete heat exchange, thereby achieving the purpose of refrigeration in the cold storage compartment.

[0066] To address the issue of persistently high or uneven temperatures at the top of the refrigerator compartment, this air duct system incorporates a centrifugal fan and multiple narrow air ducts at the top. Utilizing the Coanda effect, it increases the amount of cold air supplied from the freezer compartment to the refrigerator compartment, particularly from the top of the air duct system, thereby achieving rapid cooling of the refrigerator compartment and saving power consumption.

[0067] The refrigerator compartment temperature is automatically controlled by temperature sensors in the air damper and air duct device within the refrigerator's foam layer. When the temperature sensor detects a high temperature in the refrigerator compartment, it transmits an electrical signal to the control board to open the air damper and deliver cooling. When the temperature sensor detects a low temperature in the refrigerator compartment, it transmits an electrical signal to the control board to close the air damper and stop delivering cooling.

[0068] By applying the results of this invention, the air intake volume from freezing to refrigeration can be effectively increased, enabling rapid cooling of the refrigeration compartment, reducing compressor start-up and shutdown time, and lowering product power consumption.

[0069] By applying the results of this invention, the major quality problem of ice formation on the bottom damper of existing air duct components can be solved;

[0070] By applying the results of this invention, the defect of the front air outlet of the existing air duct assembly affecting the appearance can be solved;

[0071] By applying the results of this invention, the problem of increased maintenance costs for damaged air duct components in existing structures can be solved.

[0072] The present invention has a simple production process. The air duct device adopts a top-down extrusion assembly, which can ensure the sealing effectiveness between the air duct device and the box, while reducing the labor intensity of workers and improving the production efficiency of the assembly line.

[0073] It is also important to note that:

[0074] Figure 8 The arrows in the image represent high-speed airflow that is directed out from the first-layer vent along the top arc surface under the influence of the Coanda effect.

[0075] Figure 9 The middle arrow indicates supplementary airflow, which replenishes the low-pressure area formed by the high-speed airflow. Similarly, due to the Coanda effect, the air is directed along the lower arc surface of the first-layer air outlet, thereby increasing the air intake from freezing to refrigeration and achieving rapid cooling of the refrigeration compartment.

[0076] Based on the cooling requirements of each floor, the size of the air outlets for each floor is different. Following the upward airflow direction, the air outlets gradually increase in size. By utilizing the Coanda effect, as much cooling as possible is directed vertically to the top floor. Then, through the natural principle that cooling air sinks and hot air rises, the cooling temperature of the top floor is guaranteed.

[0077] The change in cooling air pressure is achieved by varying the width of the air duct passage.

[0078] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the scope of the claims.

Claims

1. A refrigerator cooling air duct device, characterized in that, include: Wind shield (1); A duct foam (2) is installed inside the hood (1). A duct (201) is formed inside the duct foam (2). An air inlet is formed at the bottom of the duct foam (2). An air outlet is provided on both sides of the top of the duct foam (2). Multiple first wind-blocking parts are vertically spaced and protruding on the duct foam (2) at the air outlet. The gap between the multiple first wind-blocking parts forms an air outlet. The first wind-blocking parts at the top extend laterally inward. The first wind-blocking part, which extends laterally, has rounded corners at its ends, with both its bottom and top ends being arc-shaped. A fan (5) is set between the two air outlet channels. The air duct foam (2) has symmetrical second wind-blocking parts protruding on both sides of the fan (5). The gap formed between the two second wind-blocking parts is connected to the air duct (201). The air discharged by the fan (5) forms a Coanda effect with the air in the air duct (201) through the second windbreak and the first windbreak; The air outlet includes a first air outlet (2013), a second air outlet (2014), and a third air outlet (2015), which are arranged vertically from top to bottom in sequence. The air inlet at the bottom of the air duct foam (2) and the air outlets on both sides of the top of the air duct foam (2) are both connected to the air duct (201); The fan (5) is located below the first air outlet (2013).

2. A refrigerator refrigeration air duct device according to claim 1, characterized in that, The air duct (201) is V-shaped.

3. A refrigerator refrigeration air duct device according to claim 1, characterized in that, The air inlet of the air duct foam (2) is provided with an air duct foam cover (3). The air inlet includes a first air inlet (2011) and a second air inlet (2012). The air duct foam cover (3) also has a first opening (31) and a second opening (32) that cooperate with the first air inlet (2011) and the second air inlet (2012).

4. A refrigerator refrigeration air duct device according to claim 3, characterized in that, The back of the hood (1) is provided with a fourth air outlet (7), which is connected to the second air inlet (2012).

5. A refrigerator refrigeration air duct device according to any one of claims 1 to 4, characterized in that, The fan cover (1) is also equipped with a temperature sensing element (8).

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