CN108413685A - Wind cooling refrigerator and its defrosting control method - Google Patents

Abstract

The invention discloses an air-cooled refrigerator, which comprises a refrigerating chamber, a freezing chamber and an evaporator chamber. An evaporator and a heating pipe are arranged in the evaporator chamber. Freezing air passes between the freezing chamber and the evaporator chamber. The first air door that can be opened and closed is arranged in the freezing air channel, and it is characterized in that the refrigerator compartment includes a first air inlet and a first air outlet, and the evaporator chamber includes a second air inlet, a second air Two air outlets and a fan arranged near the second air outlet; the air-cooled refrigerator also includes a refrigerating air duct communicating with the first air inlet and the second air outlet and communicating with the first air outlet and the second air inlet The return air duct of the tuyere, wherein the second damper is arranged in the refrigerating air duct; the heating tube can be preheated by returning the high-temperature return air in the refrigerating room to the evaporator chamber through the return air duct, so that the heating tube can Heating to the defrosting temperature in a shorter time saves the energy consumption of the heating tube during heating and is more energy-saving and environmentally friendly.

Description

Air-cooled refrigerator and its defrosting control method

technical field

The invention belongs to the field of household appliances, in particular to an air-cooled refrigerator and a defrosting control method thereof.

Background technique

Existing air-cooled refrigerators usually use defrosting heating wires on the evaporator to defrost the evaporator. In the existing defrosting control mode, the defrosting heating wire works to generate heat to increase the temperature of the evaporator, and then turn the frost condensed on the evaporator into water, and then discharge it through the drain pipe to achieve the effect of defrosting; The shortcomings of the method are also obvious: in the process of changing the defrosting temperature from low to high, all energy consumption is the heat generated by the heating tube, and because the heating tube is heated to the target temperature in a low-temperature environment, the power generated is very high. As a result, a large amount of energy is consumed, which is not conducive to the product concept of environmental protection and energy saving.

Contents of the invention

In order to solve the above problems, the present invention proposes an air-cooled refrigerator, comprising a refrigerating chamber, a freezing chamber and an evaporator chamber, an evaporator and a heating pipe are arranged in the evaporator chamber, and the freezing chamber and the evaporator chamber They are connected by a refrigerating air channel, the refrigerating air channel is provided with a first air door that can be opened and closed, the refrigerating chamber includes a first air inlet and a first air outlet, and the evaporator chamber includes a second air inlet, The second air outlet and a fan arranged near the second air outlet; the air-cooled refrigerator also includes a refrigerating air duct communicating with the first air inlet and the second air outlet and communicating with the first air outlet and the second air outlet. The return air duct of the air inlet, wherein a second damper is arranged in the refrigerating air duct.

As a further improvement of the present invention, the installation height of the first air outlet is higher than that of the first air inlet, and the installation height of the second air outlet is higher than that of the second air inlet.

As a further improvement of the present invention, the evaporator is arranged close to the second air outlet, and the heating pipe is arranged close to the second air inlet.

As a further improvement of the present invention, one end of the refrigerating air duct connected to the evaporator chamber forms a third air outlet adjacent to the fan, and the height of the third air outlet corresponds to the height of the fan.

The present invention also proposes a defrosting control method for an air-cooled refrigerator as described in any one of the above, said method comprising steps:

Determine whether the evaporator needs defrosting;

If so, close the second damper;

Detecting the temperatures of the freezing chamber and the refrigerating chamber, and controlling the evaporator to stop cooling when the temperature of the freezing chamber is lower than a first threshold temperature;

Close the first air door, open the second air door, control the operation of the fan to blow the air in the evaporator chamber to the refrigerator through the refrigeration air channel, and then make the return air generated in the refrigerator come from the The return air duct enters the evaporator chamber;

detecting the temperature of the refrigerating chamber, and closing the second damper when the temperature of the refrigerating chamber reaches a second threshold temperature;

Control the heating tube to work until the defrosting is completed.

As a further improvement of the present invention, the step "detecting the temperature of the freezer and refrigerator" specifically includes:

If the temperature of the freezer compartment is higher than the first threshold temperature, open the first damper to cool the freezer compartment, and at the same time detect whether the temperature of the freezer compartment is greater than the third threshold temperature, and if so, open the second damper The damper cools the refrigerating chamber, and closes the second damper when the temperature of the refrigerating chamber is less than or equal to a third threshold temperature and greater than or equal to a fourth threshold temperature; wherein, the third threshold temperature is lower than the second threshold temperature threshold temperature.

Beneficial effects of the present invention: the heating pipe can be heated to the defrosting temperature in a shorter time by returning the high-temperature return air in the refrigerating room to the evaporator chamber through the return air duct to preheat the heating pipe, which saves The energy consumption of the heating tube during heating is more energy-saving and environmentally friendly.

Description of drawings

Fig. 1 is the structural representation of air-cooled refrigerator of the present invention;

Fig. 2 is a flow chart of the defrosting control method of the present invention.

Detailed ways

Text: In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

Furthermore, repeated reference numerals or designations may be used in different embodiments. These repetitions are only for the sake of simple and clear description of the present invention, and do not represent any relationship between the different embodiments or structures discussed.

The specific implementation manner in an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The present invention proposes an air-cooled refrigerator 10, comprising a refrigerating chamber 100, a freezing chamber 200 and an evaporator chamber 300, wherein the evaporator chamber 300 is provided with an evaporator 340 and a heating device for defrosting the evaporator 340 Tube 350.

As shown in FIG. 1, the freezing chamber 200 and the evaporator chamber 300 are connected by a freezing air duct 600 and a first damper 610 that can be opened and closed is arranged in the freezing air duct 600. Specifically, the first damper 610 in this embodiment The damper 610 is set as an electronic damper.

Further, the refrigerating room 100 includes a first air inlet 110 and a first air outlet 120, and the evaporator chamber 300 includes a second air inlet 310, a second air outlet 320, and a fan 330 disposed near the second air outlet 320, At the same time, the air-cooled refrigerator 10 also includes a refrigerating air duct 400 connected to the first air inlet 110 and the second air outlet 320, and a return air duct 500 connected to the first air outlet 120 and the second air inlet 310, wherein the refrigerating air A second damper 410 is also set in the duct 400, specifically, the second damper 410 in this embodiment is also set as an electronic damper.

Specifically, when the cooling capacity needs to be supplemented in the refrigerator compartment 100, the second damper 410 is opened, and the cold air generated by the cooling of the evaporator 340 in the evaporator chamber 300 is blown into the refrigerator compartment 100 by the fan 330 through the refrigeration air duct 400. To control the temperature in the refrigerating chamber 100; when the freezing chamber 200 needs supplementary cold capacity, the first damper 610 is opened, and the cold air produced by the evaporator 340 in the evaporator chamber 300 is passed through the refrigerating air duct 600 by the fan 330 Blow into the freezer 200 to control the temperature in the freezer 200 .

Further, in this embodiment, the setting height of the first air outlet 120 is higher than that of the first air inlet 110, and the setting height of the second air outlet 320 is higher than that of the second air inlet 310. Meanwhile, in this embodiment The first air inlet 110 and the first air outlet 120 are set on different walls of the refrigerator compartment 100 respectively, the first air inlet 110 is opened on the bottom wall of the refrigerator compartment 100, and the first air outlet 120 is opened on the rear of the refrigerator compartment 100. wall; at the same time, the second air inlet 310 and the second air outlet 320 are respectively opened on different walls of the evaporator chamber 300, the second air inlet 310 is opened at the bottom end of the rear wall of the evaporator chamber 300, and the second The air outlet 320 is opened on the top wall of the evaporator chamber 300 .

Through the above design, the present invention can make the wind in the evaporator chamber 300 form from the second air outlet 320—the refrigeration air duct 400—the first air inlet 110—the first air outlet 120—the return air duct 500—the second air inlet. The tuyere 310—the closed-loop circulation of the evaporator chamber 300 makes the air circulation between the evaporator chamber 300 and the refrigerator compartment 100 have an optimal path.

Further, the evaporator 340 in this embodiment is arranged close to the second air outlet 320 to improve the efficiency of sending cold air to the refrigerator compartment 100 and/or the freezer compartment 200, and the heating pipe 350 is arranged close to the second air inlet 310 so that The temperature of the heating pipe 350 is maintained by the high-temperature return air returned from the refrigerating room 100 through the return air duct 500 , which avoids a large amount of energy loss caused by the heating pipe 350 being too low in temperature when heating is required.

Further, a partition 220 is provided between the evaporator chamber 300 and the freezing chamber 200 , which not only increases the stability, but also reduces the loss of cooling capacity in the freezing chamber 200 , thereby improving the energy-saving efficiency.

At the same time, the end of the refrigeration air duct 600 connected to the evaporator chamber 300 is formed with a third air outlet 210 disposed adjacent to the fan 330, and the height of the third air outlet 210 corresponds to the height of the fan 330. Specifically, in this embodiment The third air outlet 210 is arranged on the front wall of the evaporator chamber 300, so that the fan 330 can supply air to the refrigerator compartment 100 and the freezer compartment 200 at the same time, which saves the production cost.

Further, in combination with what is shown in FIG. 2 , the present invention also proposes a defrosting control method for the air-cooled refrigerator 10. The specific control method includes the following steps:

Determine whether the evaporator 340 needs defrosting; specifically, the air-cooled refrigerator 10 in this embodiment enters the defrosting mode including automatic selection and manual selection by the user, wherein the automatic selection can be based on the cumulative working time of the air-cooled refrigerator 10 and the evaporator The cumulative working time of 340 is used for judgment, and the manual selection can control the air-cooled refrigerator 10 to enter the defrosting mode at any time according to the user's own needs;

If so, close the second damper 410;

Detecting the temperatures of the freezer compartment 200 and the refrigerator compartment 100, and controlling the evaporator 340 to stop cooling when the temperature of the freezer compartment 200 is lower than a first threshold temperature;

Specifically, if the temperature of the freezer compartment 200 is higher than the first threshold temperature, the first damper 610 is opened to cool the freezer compartment 200, and at the same time, it is detected whether the temperature of the refrigerator compartment 100 is greater than the third threshold temperature, and if so, the second damper 410 is opened for cooling. The refrigerating room 100 is refrigerated, and when the temperature of the refrigerating room 100 is less than or equal to the third threshold temperature and greater than or equal to the fourth threshold temperature, the second damper 410 is closed to ensure that the storage in the refrigerating room 100 can be within the effective refrigerating temperature range. Refrigerate inside.

Close the first damper 610, open the second damper 410, and control the operation of the fan 330 to blow the air in the evaporator chamber 300 to the refrigerating room 100 through the refrigerating air duct 400, so that the return air generated in the refrigerating room 100 will return to itself. The air duct 500 enters the evaporator chamber 300; since the evaporator 340 stops cooling, the temperature of the return air generated in the refrigerator compartment 100 rises, and since the heating pipe 350 is set close to the second air inlet 310, the second air inlet The high-temperature return air entering the evaporator chamber 300 from the tuyere 310 continues to preheat the heating pipe 350;

Detect the temperature of the refrigerating room 100, and when the temperature of the refrigerating room 100 reaches a second threshold temperature, close the second damper 410, wherein the second threshold temperature is greater than the third threshold temperature, so as to reserve an appropriate space for the refrigerating room 100 to heat up, thereby ensuring high temperature The return air preheats the heating pipe 350 sufficiently, and at the same time, the second threshold temperature is the maximum refrigeration temperature of the refrigerator compartment 100. If the temperature in the refrigerator compartment 100 is higher than the second threshold temperature, the second damper 410 is still kept open, which will cause the refrigerator compartment to The temperature inside 100 continues to rise, thereby affecting the effective refrigeration of the storage in the refrigerator 100;

The heating tube 350 is controlled to start working until the defrosting of the evaporator 340 is completed. Because the heating pipe 350 is continuously preheated by the high-temperature return air, the heating pipe 350 can be heated to the temperature required for defrosting in a shorter time, which saves the energy consumption of the heating pipe 350 during heating, and is more energy-saving and environmentally friendly.

The defrosting method proposed by the present invention preheats the heating pipe 350 by returning the high-temperature return air in the refrigerator compartment 100 to the evaporator chamber 300 through the return air duct 500, so that the heating pipe 350 can be heated in a shorter time. The internal heating reaches the defrosting temperature, which saves the energy consumption of the heating tube 350 during heating, and is more energy-saving and environment-friendly.

It should be understood that although the description is described according to the embodiments, not each embodiment only includes an independent technical solution, and this description of the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes made without departing from the technical spirit of the present invention All should be included within the protection scope of the present invention.

Claims (6)

1. An air-cooled refrigerator, comprising a refrigerating chamber, a freezing chamber and an evaporator chamber, an evaporator and a heating pipe are arranged in the evaporator chamber, and the freezing chamber and the evaporator chamber are connected by a freezing air duct , the first air door that can be opened and closed is arranged in the freezing air duct, and it is characterized in that the refrigerator compartment includes a first air inlet and a first air outlet, and the evaporator chamber includes a second air inlet, a second outlet An air outlet and a fan arranged near the second air outlet; the air-cooled refrigerator also includes a refrigerating air duct communicating with the first air inlet and the second air outlet and a cooling air channel communicating with the first air outlet and the second air inlet A return air duct, wherein a second damper is arranged in the refrigerating air duct. 2. The air-cooled refrigerator according to claim 1, characterized in that, the installation height of the first air outlet is higher than the installation height of the first air inlet, and the installation height of the second air outlet is higher than the installation height of the first air inlet. Describe the setting height of the second air inlet. 3. The air-cooled refrigerator according to claim 1, wherein the evaporator is arranged close to the second air outlet, and the heating pipe is arranged close to the second air inlet. 4. The air-cooled refrigerator according to claim 1, wherein one end of the refrigerating air duct connected to the evaporator chamber forms a third air outlet adjacent to the fan, and the height of the third air outlet is the same as that of the fan. The positions of the fans correspond to the heights. 5. A method for controlling defrosting of an air-cooled refrigerator according to any one of claims 1 to 4, wherein said method comprises the steps of: Determine whether the evaporator needs defrosting; If so, close the second damper; Detecting the temperatures of the freezing chamber and the refrigerating chamber, and controlling the evaporator to stop cooling when the temperature of the freezing chamber is lower than a first threshold temperature; Close the first air door, open the second air door, control the operation of the fan to blow the air in the evaporator chamber to the refrigerator through the refrigeration air channel, and then make the return air generated in the refrigerator come from the The return air duct enters the evaporator chamber; detecting the temperature of the refrigerating chamber, and closing the second damper when the temperature of the refrigerating chamber reaches a second threshold temperature; Control the heating tube to work until the defrosting is completed. 6. The defrosting control method according to claim 5, wherein the step "detecting the temperature of the freezing chamber and the refrigerating chamber" specifically comprises: If the temperature of the freezer compartment is higher than the first threshold temperature, open the first damper to cool the freezer compartment, and at the same time detect whether the temperature of the freezer compartment is greater than the third threshold temperature, and if so, open the second damper The damper cools the refrigerating chamber, and closes the second damper when the temperature of the refrigerating chamber is less than or equal to a third threshold temperature and greater than or equal to a fourth threshold temperature; wherein, the third threshold temperature is lower than the second threshold temperature threshold temperature.