CN201314738Y - A self-circulating defrosting refrigeration refrigerator - Google Patents

Abstract

The utility model discloses a self-circulation defrosting refrigerating refrigerator, which comprises a compressor, a refrigerating cycle system of a refrigerating chamber and a refrigerating cycle system of a freezing chamber, and the refrigerating cycle system of the refrigerating chamber includes a refrigerating chamber (1) and a cavity (3) where an evaporator is located. And the second air passage (5) connecting the refrigerating chamber (1) and the cavity (3) where the evaporator is located, the refrigeration cycle system of the freezing room includes the freezing room (2), the cavity (3) where the evaporator is located, and the connecting freezer ( 2) The first air passage (4) of the cavity (3) where the evaporator is located, and the refrigerating room and the freezing room share an evaporator. The utility model can effectively reduce the energy consumption of the refrigerator and prolong the preservation period of stored food.

Description

A self-circulating defrosting refrigeration refrigerator

technical field

The utility model relates to a self-circulation defrosting refrigeration refrigerator, in particular to a refrigerator system for refrigerating a refrigerating room by utilizing the cold energy released during the defrosting process of an evaporator.

technical background

Air-cooled refrigerators, also known as frost-free refrigerators (or indirect-cooled refrigerators), use fans to force the cold air to circulate and indirectly refrigerate and freeze food. , the food is getting drier, and compared with the direct-cooling refrigerator, the fresh-keeping ability is getting worse and worse.

In addition, the water taken away by the air-cooled refrigerator freezes on the surface of the evaporator to form a frost layer when passing through the evaporator. The existence of the frost layer will affect the cooling performance and even block the circulation of the air. There are generally four defrosting methods commonly used in frost-free refrigerators: ① Start defrosting by using the temperature value of the circulating air at the inlet and outlet of the evaporator; ② Set a frosting sensor at a specific measurement point; The thickness of the frost layer is used to defrost; ④Application of fuzzy reasoning, when the temperature of the refrigerator is the most stable, even if the thickness of the frost layer is not large, the defrosting is performed quickly; ⑤According to the accumulated running time of the compressor reaches a certain value, defrost at a fixed time.

All the above-mentioned defrosting methods have additional power consumption of defrosting electric heating wires, and this power consumption accounts for 5% of the total power consumption of refrigerators. According to the current power consumption level and production capacity estimates, China will produce During the expected service life of refrigerators, 601 billion kilowatt-hours of electricity will be consumed, and 5,700 megawatts of power generation capacity will need to be added. Based on this calculation, the power consumed by defrosting will exceed 285 megawatts. For a population of 1.3 billion, energy is becoming increasingly tense For a big country like China, this is indeed a not small number. Therefore, the energy saving of refrigerators has far-reaching significance not only to economy but also to environmental protection.

Utility model content

The purpose of this utility model is to solve the deficiencies of the existing technology and abandon the traditional electric heating defrosting mode. A self-circulating defrosting refrigeration refrigerator whose cooling capacity cools the refrigerator compartment. At the same time, the water vapor released by the evaporator during the defrosting process humidifies the refrigerator compartment.

In order to achieve the above purpose, the technical solution of the present utility model is: a self-circulating defrosting refrigeration refrigerator, including a compressor, a refrigerating cycle system in a refrigerating chamber and a refrigerating cycle system in a freezing chamber, and the second air duct of the cavity where the evaporator is located, The refrigerating cycle system of the freezer compartment includes a freezer compartment, a cavity where the evaporator is located, and a first air duct connecting the freezer compartment and the cavity where the evaporator is located, and the refrigerated compartment and the freezer compartment share an evaporator.

The refrigerating chamber is located at the top, and the freezing chamber is located below, separated by a partition in the middle, and an evaporator is placed directly below the partition.

The first air duct is provided with a first fan, the second air duct is provided with a second fan, the connection between the first air duct and the cavity where the evaporator is located is provided with a first electric damper, the air return port of the refrigerating room and the return air of the freezing room The tuyere is equipped with a second electric damper;

When the compressor starts, the first fan starts, the second fan stops working, the first electric damper opens, and the second electric damper closes the refrigerator compartment, the cavity where the evaporator is located, the first air duct and the freezer compartment constitute a freezer refrigeration cycle system ;When the compressor stops, the first fan stops working, and the second fan starts, the first electric damper is fully closed, the second electric damper closes the freezer, and the cavity where the evaporator is located, the second air duct and the freezer constitute a refrigeration cycle for the freezer system.

The second fan is located at the top of the back of the refrigerating chamber, and the angle between the second fan and the back is 45°-60°.

The return air vent of the refrigerating room is located on the partition between the refrigerating room and the freezing room, and is close to the panel.

The first and second electric dampers both include a door frame, a door, a hinge shaft and a stepper motor, and the door is opened or closed by the stepper motor.

Compared with the prior art, the utility model utilizes a refrigerating room, a freezing room, a refrigerating cycle system of the refrigerating room and a refrigerating cycle system of the freezing room, and the refrigerating room and the freezing room share an evaporator. Since the utility model adopts the self-circulation control mode to cool the refrigerator and defrost the evaporator, the electric heating wire only plays the role of auxiliary defrosting, thereby reducing energy consumption and prolonging the preservation period of food.

Description of drawings

Fig. 1 is a structural schematic diagram of a self-circulating defrosting refrigeration refrigerator of the present invention;

Fig. 2a is the front structural schematic view of the electric damper of the present utility model;

Fig. 2b is a schematic diagram of the side structure of the electric damper of the present invention.

Detailed ways

As shown in Figure 1, a self-circulating defrosting refrigeration refrigerator includes a compressor, a refrigerating cycle system for a refrigerating chamber, and a refrigerating cycle system for a freezing chamber. The chamber 1 and the second air duct 5 of the cavity 3 where the evaporator is located, the refrigeration cycle system of the freezer compartment includes the freezer room 2, the cavity 3 where the evaporator is located, and the first air duct 4 connecting the freezer room 2 and the cavity 3 where the evaporator is located , and the refrigerator and freezer share an evaporator.

When the compressor starts to work, the refrigeration system of the freezer starts to work, and the evaporator in cavity 3 where the evaporator is located is frosted; when the refrigeration system of the freezer works to the specified threshold, the compressor stops working, the refrigeration system of the refrigerator starts, Refrigeration, the frost on the surface of the evaporator begins to melt, and when the specified threshold is reached, the compressor starts to work again, and the freezer system starts again, thus completing a cycle.

The refrigerating chamber is located at the top, and the freezing chamber is located below, separated by a partition in the middle, and an evaporator is placed directly below the partition.

The first air duct 4 is provided with a first fan M1, the second air duct 5 is provided with a second fan M2, and the connection between the first air duct 4 and the cavity 3 where the evaporator is located is provided with a first electric damper K1 , the return air outlet of the refrigerating room and the air return opening of the freezing room are provided with a second electric damper K2;

When the compressor starts, the first fan starts, the second fan stops working, the first electric damper opens, and the second electric damper closes the refrigerator compartment, the cavity where the evaporator is located, the first air duct and the freezer compartment constitute a freezer refrigeration cycle system ;When the compressor stops, the first fan stops working, and the second fan starts, the first electric damper is fully closed, the second electric damper closes the freezer, and the cavity where the evaporator is located, the second air duct and the freezer constitute a refrigeration cycle for the freezer system.

The second fan M2 is located at the top of the back of the inner cavity of the refrigerating chamber 1, and the angle between the second fan M2 and the back is 45°-60°.

The return air vent of the refrigerating room is located on the partition between the refrigerating room and the freezing room, and is close to the panel.

As shown in Figures 2a and 2b, the first and second electric dampers are composed of a door 6, a door frame 7, a hinge shaft 8 and a stepping motor, and the door is opened or closed by the stepping motor.

Claims (6)

1, a kind of self-loopa defrost refrigerator, comprise compressor, refrigerating chamber cooling cycle system and refrigerating chamber cooling cycle system, it is characterized in that: the refrigerating chamber cooling cycle system comprises refrigerating chamber (1), evaporimeter place cavity (3) and connects second air channel (5) of refrigerating chamber (1) and evaporimeter place cavity (3), the refrigerating chamber cooling cycle system comprises refrigerating chamber (2), evaporimeter place cavity (3), connects first air channel (4) of refrigerating chamber (2) and evaporimeter place cavity (3), and refrigerating chamber and the shared evaporimeter of refrigerating chamber.

2, self-loopa defrost refrigerator according to claim 1 is characterized in that: this refrigerating chamber is positioned at the top, and refrigerating chamber is positioned at the below, and the centre separates with dividing plate, places evaporimeter under dividing plate.

3, self-loopa defrost refrigerator according to claim 2, it is characterized in that: this first air channel (4) is provided with first blower fan (M1), second air channel (5) is provided with second blower fan (M2), first air channel (4) is provided with first MOD (K1) with the connector place of evaporimeter place cavity (3), and refrigerating chamber return air inlet and refrigerating chamber return air inlet are provided with second MOD (K2);

When compressor start, first fan starting, second blower fan quit work, first MOD is opened, during the second MOD closing cold room, evaporimeter place cavity, first air channel and refrigerating chamber constitute the refrigerating chamber cooling cycle system; When compressor shutdown, first blower fan quit work, second fan starting, first MOD closes entirely, second MOD is closed refrigerating chamber, and evaporimeter place cavity, second air channel and refrigerating chamber constitute the refrigerating chamber cooling cycle system.

4, self-loopa defrost refrigerator according to claim 3 is characterized in that: second blower fan (M2) is positioned at refrigerating chamber (1) inner chamber back top, and second blower fan (M2) is 45 °～60 ° with the back angle.

5, self-loopa defrost refrigerator according to claim 4 is characterized in that: the refrigerating chamber return air inlet is on the dividing plate between refrigerating chamber and the refrigerating chamber, and close panel.

6, according to each described self-loopa defrost refrigerator of claim 3 to 5, it is characterized in that: described first and second MOD includes doorframe (6), door (7), hinge axis (8) and dynamo-electric machine of step, and door is opened by step motor control or be closed.

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