CN1868378A - Method for air blowing to air-cooled freezer and freezer using the method - Google Patents

Abstract

The invention discloses an air supply method for an air-cooled refrigerator and an air-cooled refrigerator adopting the air supply method. The air supply method of the air-cooled freezer adopts the way of opposite air supply with double side walls, and the air supply and return air outlets are relatively arranged on the upper and bottom of the two opposite side walls, so that the cold air is sent out from the top of the two opposite side walls. Return from the bottom air return ports of the two side walls. The freezer using this air supply method includes a forced air circulation cooling system, which is characterized in that the air supply port and the return air port are arranged oppositely on both sides, the air supply port is relatively arranged on the top of the two opposite side walls, and the return air port is relatively arranged on the two opposite sides. bottom of the side wall. The invention makes the cold air sent out from the opposite side wall of the freezer, the cold air has strong penetrating ability, and the cooling speed is fast. At the same time, the return air duct can be used to form a hanger on the inner container of the freezer, which kills two birds with one stone and is simple and convenient.

Description

Air supply method for air-cooled freezer and air-cooled freezer using the method

technical field

The invention relates to an air supply method for an air-cooled refrigerator and an air-cooled refrigerator applying the method.

Background technique

Today, most of the freezers that use vapor compression refrigeration are direct cooling. The cold air cools the food by natural convection. The evaporator is generally installed in the side wall or/and bottom wall of the freezer. The refrigeration system mainly includes compressors, condensers The working process is: the refrigerant liquid in the evaporator absorbs the heat in the freezer at low pressure and low temperature and boils, and the low-pressure and low-temperature refrigerant vapor generated is compressed Inhaled by the machine, after being compressed, it becomes a high-pressure and high-temperature gas and enters the condenser. Due to the cooling effect of the outdoor air, the refrigerant releases heat in the condenser and condenses into a liquid for the outdoor air. Then it returns to the evaporator, and thus continues the cycle of evaporation, compression, condensation, and throttling. At the same time, the refrigerant periodically changes its state from liquid to vapor and from vapor to liquid. , continuously transfer the heat inside the freezer to the outside of the freezer, so as to achieve the purpose of cooling.

Due to the cooling effect of the evaporator, the temperature of the air near the inner liner of the freezer is very low, the saturated humidity of the air is small, and the content of water vapor contained in a unit volume of air is very low. Under the effect of low temperature, the water vapor in the air It will condense into small liquid droplets, and when the temperature of the inner wall is lower than 0 degrees, these small water droplets will further condense into frost. These frosts adhere to the inner wall, which not only reduces the cooling efficiency of the evaporator, but also increases the power consumption, lowers the COP, and increases the work of manual defrosting.

EP0769262A2 discloses an air-cooled freezer, which includes a side wall, a bottom wall, a top cover, a cold room and a forced ventilation circulation cooling system. The upper end of the side wall, the two side walls and the bottom wall are respectively provided with a section of air duct, and the three sections of air duct form a channel connected between the air supply and return air outlets, and the evaporator and fan are arranged in the air duct of the bottom wall of the freezer. When working, the fan sends the cold air produced by the evaporator into the cold room from the air supply port on the side wall, and the cold air with a slightly higher temperature after absorbing the heat of the food is led back to the evaporator from the return air port on the side wall opposite to the air supply port for cooling. , cooled and then sent to the cold room, thus performing a continuous cycle cooling process. However, in this way, since the air supply and return air outlets are arranged relatively on the top of the two side walls, the cooling effect of the cold air on the food at the bottom of the freezer is poor, so the refrigeration system needs to run for more time to fully absorb the food at the bottom. Refrigeration, the energy efficiency ratio of freezer reduces; Although this invention is in order to improve the refrigerating effect of cold room, the top cover is made a top cover that has a large concave space on the side of cold room, but still have following two problems: 1, because The airflow is sent in from the upper side and returned from the upper side, the cooling effect of the food at the bottom of the freezer is still poor, and the cooling rate is still low; 2, because the top cover takes up a lot of space, compared with a freezer with the same capacity, it takes up a lot of space.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a method of sending cold air from two opposite side walls of the freezer, which has strong penetration ability of cold wind and fast cooling speed, and a freezer using the method.

The air-supply method of the air-cooled freezer of the present invention is: adopt the mode of double-side-wall relative air-supply, it arranges the air-supply and the return air outlet relatively on the upper part and the bottom of two opposite side walls, makes the cold wind flow from two opposite sides After the tops of the walls are sent out relative to each other, they are returned by the bottom air return ports of the two side walls.

As an air-cooled freezer using the above-mentioned air supply method, it includes a cabinet body, a refrigeration system, and a forced air circulation cooling system, wherein: the cabinet body includes a side wall, a top cover, a bottom wall, and a cold room surrounded by the three, and the side wall The wall is divided into front side wall, rear side wall, left side wall and right side wall; the forced air circulation cooling system includes air supply port, return air port, air channel structure connecting the air supply port and return air port, and the The fan in the structure is characterized in that: the air supply port and the air return port are arranged oppositely on both sides, the air supply port is relatively arranged on the top of the two opposite side walls, and the air return port is relatively arranged on the bottom of the two opposite side walls.

As a further improvement of the air supply method of the air-cooled freezer, the relative distance between the air supply and return air outlets is between 400mm-700mm, and the air supply speed is not lower than 1000L/min. As a further improvement of the air supply method of the air-cooled freezer, the cold air is sent laterally or slightly upward by the air supply port, and the inclination angle thereof is not greater than 5°. Due to the influence of the return air, the direction of the cold air flow will gradually deflect downward from the air supply port, making it difficult to effectively cool the food on the upper part of the freezer opposite to the air supply port, and this position is often some newly placed food. Rapid cooling cannot be obtained. The slightly upward blowing of the cold air enhances the cooling of this area.

As a further improvement of the above-mentioned air-cooled freezer, the vertical relative distance between the air supply port and the air return port is between 400 mm and 700 mm, and the air supply speed of the air supply port is greater than 1000 L/min. Our experiments have proved that if the spacing is too small or the air supply speed is too small, it is easy to cause a part of the cold air to come out from the air supply port and be led back from the return air port within a short distance, resulting in unnecessary energy consumption of the fan. consumption.

As a further improvement of the previous air-cooled freezer, the air supply outlet and the air return outlet are strip-shaped outlets, and are arranged transversely along the side wall. The strip arrangement is beneficial to the better diffusion and return of cold air in the cold room.

As a further improvement of the previous air-cooled freezer, the relative distance between the air supply port and the air return port is between 400 mm and 700 mm. Our experiments have proved that if the distance is too small or too large, it will not be conducive to the better diffusion and return of cold air in the cold room. At the same time, part of the cold air will be led back from the air return port within a short distance after coming out of the air supply port, thereby causing unnecessary consumption of fan energy.

As a further improvement of the previous air-cooled freezer, the air supply duct where the air supply outlet is located is on the same plane as the side wall; the return air duct where the air return outlet is located protrudes toward the cold room, and a chute structure is formed on the convex hull. In this way, the return air duct can be used to form a hanger on the inner tank of the freezer, which kills two birds with one stone, simple and convenient!

As a further improvement of the previous air-cooled freezer, the length of the air supply port is between 10mm and 30mm, the width is between 10mm and 30mm, and each side wall can have multiple air supply ports; the length of the air return port is 10mm ~30mm, width between 10mm~30mm, each side wall can have multiple return air outlets. The optimized parameters of the return air outlet provided by the present invention will make the air supply effect of the present invention better

The present invention utilizes the upper and lower arrangement of the air supply port and the air return port on the same side wall, so that the cold air is sent out from the relative air supply ports arranged at the upper ends of the two opposite side walls and returned by the relative return air ports located at the bottom of the same two side walls. In this way, since the cold air enters the cold room, the cooling speed of the food in the cold room is accelerated. At the same time, the convex air return duct structure makes the inner tank of the freezer form a chute, killing two birds with one stone, and the process is simple and convenient.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the working schematic diagram of the forced air circulating cooling system of the present invention;

Fig. 2 is a three-dimensional schematic diagram of an embodiment of the present invention;

Fig. 3 is a longitudinal sectional view of an embodiment of the present invention;

Fig. 4 is a transverse sectional view of an embodiment of the present invention;

Detailed ways

The air-supply method of the air-cooled freezer of the present invention is: adopt the mode of double-side-wall relative air-supply, it arranges the air-supply and the return air outlet relatively on the upper part and the bottom of two opposite side walls, makes the cold wind flow from two opposite sides After the tops of the walls are sent out relative to each other, they are returned by the bottom air return ports of the two side walls.

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, an air-cooled freezer includes a cabinet body 1, a refrigeration system, and a forced air circulation cooling system.

Wherein: cabinet body 1 comprises side wall 11, top cover 13, bottom wall 12 and the cold room 14 that is surrounded by three, and side wall is divided into front side wall 111, back side wall 112, left side wall 113, right side wall again. side wall 114;

The forced air circulation cooling system includes an air supply port 28 , an air return port 29 , an air channel structure 213 connecting the air supply port 28 and the air return port 29 , and a fan 22 arranged in the air channel structure 213 . The air supply port 28 and the air return port 29 are arranged oppositely on the front and rear side walls 111, 112 on both sides, wherein the air supply port 28 is relatively arranged on the top of the two opposite side walls 112, 111, and the air return port 29 is relatively arranged on the two opposite side walls 112, 111 bottom.

Both the air supply port 28 and the air return port 29 are strip-shaped air ports, and are arranged transversely along the side wall. The length of the air supply port 28 is between 10 mm and 30 mm, and the width is between 10 mm and 30 mm; the length of the return air port 29 is between 10 mm and 30 mm, and the width is between 10 mm and 30 mm. As a further improvement, the front and rear relative spacing between the air supply port 28 and the air return port 29 is between 10 mm and 30 mm, and the air supply speed of the air supply port is greater than 1000 L/min. As a further improvement of the air supply method of the air-cooled freezer, the relative distance between the air supply and return air outlets is between 400mm and 700mm, and the air supply speed is not lower than 1000L/min.

As a further improvement of the air-cooled freezer, the air supply channel 27 where the air supply outlet is located is on the same plane as the side wall. The air return channel 210 where the air return port is located protrudes toward the cold room, and a chute structure 6 is formed on the convex hull. With the structure, the upper flange of the air return channel can be used to realize the function of the hanger!

The present invention utilizes the upper and lower arrangement of the air supply port and the air return port on the same side wall, so that the cold air is sent out from the relative air supply ports arranged at the upper ends of the two opposite side walls and returned by the relative return air ports located at the bottom of the same two side walls. In this way, since the cold air enters the cold room, the cooling speed of the food in the cold room is accelerated. At the same time, the convex return air duct structure makes the inner tank of the freezer form a chute, killing two birds with one stone, and the process is simple and convenient.

Of course, the return air outlets can also be arranged on the left and right side walls on the same side!

Claims (9)

1. An air supply method for an air-cooled freezer, which uses a forced air circulation cooling system to force the cold air to flow to cool food, and is characterized in that: the mode of opposite air supply with double side walls is adopted, and the air supply and return air ports are relatively arranged on two sides. The top and bottom of the two opposite side walls, so that the cold air is sent from the tops of the two opposite side walls and then returned by the bottom air return ports of the two side walls. 2. The air supply method according to claim 1, characterized in that: the relative distance between the air supply and return air outlets is between 400mm-700mm, and the air supply speed is not lower than 1000L/min. 3. The air supply method according to claim 2, characterized in that: the cold air is sent laterally or slightly upwards from the air supply outlet, and the inclination angle thereof is not greater than 5°. 4. An air-cooled freezer, including a cabinet body, a refrigeration system, and a forced air circulation cooling system, wherein: the cabinet body includes a side wall, a top cover, a bottom wall and a cold room surrounded by the three, and the side wall is divided into two parts: It is the front side wall, the rear side wall, the left side wall and the right side wall; the forced air circulation cooling system includes the air supply port, the return air port, the air channel structure connecting the air supply port and the air return port, and the air channel structure The fan is characterized in that: the air supply port and the air return port are oppositely arranged on both sides, the air supply port is relatively arranged on the top of the two opposite side walls, and the air return port is relatively arranged on the bottom of the two opposite side walls. 5. The air-cooled refrigerator according to claim 4, characterized in that: the relative distance between the air supply port and the air return port is between 400mm-700mm. 6 . The air-cooled freezer according to claim 5 , wherein the air supply outlet and the air return outlet are strip-shaped outlets, and are arranged transversely along the side wall. 7 . 7. The air-cooled freezer according to claim 6, characterized in that: the air supply duct where the air supply outlet is located is on the same plane as the side wall, and the air return duct where the air return outlet is located protrudes toward the outside of the cold room, and its convex hull A chute structure is formed above. 8. The air-cooled freezer according to claim 7, characterized in that: the length of the air outlet is between 10mm-30mm, the width is between 10mm-30mm, and each side wall can have multiple air outlets; The length of the return air outlet is between 10mm-30mm, the width is between 10mm-30mm, and each side wall can have multiple air outlets. 9. The air-cooled freezer according to any one of claims 4 to 8, characterized in that: the air duct structure forms an air chamber on the side wall perpendicular to the wall where the air supply and return air outlets are located, and the air chamber passes through The air supply channel communicates with the air supply port, and communicates with the return air port through the return air channel.

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