CN108344230A - Anti-condensation refrigerator and its operation method - Google Patents

Abstract

The invention discloses an anti-condensation refrigerator and an operation method thereof. The refrigerator includes a refrigerator, a freezer, a refrigerator air channel for supplying cold air to the refrigerator room, a freeze air channel for supplying cold air to the freezer room, The communication duct for the cold air to flow from the refrigerating air duct or the freezing chamber to the refrigerating air duct, the first return air duct for the cold air to flow back from the refrigerating chamber to the refrigerating air duct, and the first return air duct arranged in the refrigerating air duct A fan for driving cold air. The refrigerator also has a first air door for opening and closing the communication duct and a second air door for opening and closing the first return air duct. When the refrigerator compartment is in a heat preservation state, the first air door and the second Both dampers are closed, so that the refrigerator room forms an independent closed space. At this time, even if the fan continues to run, it cannot cause negative pressure inside the refrigerator room, which can effectively prevent external hot air from entering the refrigerator room and inside the tank top. Condensation problem.

Description

Anti-condensation refrigerator and method of operation thereof

technical field

The invention relates to the field of household appliances, in particular to an anti-condensation refrigerator and an operating method thereof.

Background technique

Condensation is a phenomenon in which a high-temperature, high-humidity gas liquefies into a liquid on the surface of an object when it encounters a low-temperature object. The places where the refrigerator is prone to condensation are mainly concentrated on the tank roof, vertical beams, door seals and other positions.

The refrigerator compartment of a single-system air-cooled refrigerator has a damper to control the inflow of cold air and a return air duct for the return of internal cold air; when the refrigerator is cooling, the fan runs to drive the cold air to flow in the air duct to achieve internal cooling of the refrigerator and freezer. During this process, if the internal temperature of the refrigerating chamber reaches the preset temperature, the damper of the refrigerating chamber is automatically closed to prevent cold air from continuing to enter; while the fan continues to run and only cools down the freezing chamber. However, due to the existence of the return air duct, the running fan will create a certain negative pressure in the refrigerator. Due to the negative pressure, the hot air outside the refrigerator will enter the interior through the gap in the door body and form condensation on the top of the inner tank.

The current solution to this problem is to strengthen the airtightness of the door body and the box body, such as improving the door seal effect; however, in the process of mass production of refrigerators, this method cannot completely eliminate the cracks on the top of the refrigerator liner due to the existence of gaps. condensation phenomenon.

In view of this, it is necessary to provide a reliable anti-condensation refrigerator to solve the above problems.

Contents of the invention

The present invention aims to solve at least one of the technical problems in the prior art. In order to achieve the above-mentioned purpose of the invention, the present invention provides an anti-condensation refrigerator, the specific design of which is as follows.

An anti-condensation refrigerator, comprising a refrigerating room, a freezing room, a refrigerating air channel for providing cold air to the refrigerating room, a freezing air channel for providing cold air to the freezing room, and a cooling air channel for flowing from the refrigerating air channel or the freezing room to The communication pipe of the refrigerating air duct, the first return air duct for the cold air to return from the refrigerating chamber to the freezing air duct, and the fan arranged in the freezing air duct to drive the cold air to flow; the refrigerator also has a starter Close the first damper of the communication pipe and open and close the second damper of the first return air duct, the refrigerating room has a cooling state and a heat preservation state, and is configured such that when the refrigerating room is in a cooling state, the Both the first damper and the second damper are opened, the cold air in the freezing air passage or the freezing chamber flows to the refrigeration air passage through the communication pipe, and the cold air in the refrigeration chamber flows through the first return air return to the freezing air duct; when the refrigerating chamber is in a heat preservation state, both the first damper and the second damper are closed to stop cold air from flowing through the communication duct and the first return air duct.

Further, the refrigerating air channel is divided into two connected first refrigerating air channel and second refrigerating air channel, and cold air flows from the first refrigerating air channel to the second refrigerating air channel, and the first return air The air passage communicates the refrigerating chamber with the first freezing air passage, the communication pipe communicates the refrigerating air passage with the second freezing air passage, and the second freezing air passage communicates with the freezing chamber to The freezer compartment provides cold air.

Further, the first refrigerating air channel communicates with the second refrigerating air channel through a communication port, and the fan is installed at or close to the communication port to drive cold air from the first refrigerating air channel compartment flows to the second freezer compartment.

Further, an evaporator for cooling the cold air inside is provided in the first refrigeration air duct.

Further, the refrigerator also has a second return air duct for returning cold air from the freezing chamber to the first freezing air duct.

Further, both the first damper and the second damper are electric dampers.

Further, the first damper and the second damper are respectively arranged at the cold air inlet ends of the communication duct and the first return air duct.

The present invention also provides a method for operating the above-mentioned anti-condensation refrigerator, which includes the following steps:

The refrigerating room enters the cooling state, the first damper and the second damper are opened, the refrigerating air channel provides cold air to the refrigerating room, and continuously detects and judges whether the temperature inside the refrigerating room is higher than the user's setting. fixed refrigeration temperature,

If so, the first air door and the second air door are kept open, and the cold air in the freezing air channel or the freezing room flows to the refrigerating air channel through the communication pipe to cool down the inside of the refrigerating room. The cold air in the refrigerating chamber flows back to the freezing air duct through the first return air duct;

If not, the first damper and the second damper are closed, and the refrigerating chamber enters a heat preservation state to stop the circulation of cold air through the communication duct and the first return air duct.

The beneficial effect of the present invention is: the refrigerator based on the present invention has the first air door for opening and closing the communication pipe and the second air door for opening and closing the first return air duct. Both are closed, so that the refrigerator forms an independent closed space. At this time, even if the fan continues to run, it cannot cause negative pressure inside the refrigerator, which can effectively prevent external hot air from entering the refrigerator and forming condensation inside the tank top. Dew's problem.

Description of drawings

Fig. 1 is a schematic diagram of the first angle after removing the shell of the refrigerator of the present invention;

Fig. 2 shows the schematic diagram of the section at A-A' position in Fig. 1;

Figure 3 is an enlarged schematic diagram of area a in Figure 2;

Fig. 4 is a schematic diagram of the state when the second damper is closed in Fig. 2;

Fig. 5 shows the schematic diagram of the section at the B-B' position in Fig. 1;

Figure 6 is an enlarged schematic view of region b in Figure 5;

Fig. 7 is a schematic diagram of the state when the first damper is closed in Fig. 6;

Fig. 8 is a schematic diagram of the second angle after removing the shell of the refrigerator of the present invention

Detailed ways

The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. Please refer to FIG. 1 to FIG. 8 , which are a preferred embodiment of the present invention.

Referring to FIG. 1 and FIG. 8 , the anti-condensation refrigerator of the present invention includes a refrigerator compartment 11 and a freezer compartment 12 . As shown in FIGS. 2-7 , in the specific implementation process, in order to realize the normal refrigeration operation of the refrigerator, the refrigerator of the present invention also has a refrigerating air duct 21 for providing cold air to the refrigerating chamber 11, and a freezing air duct for providing cold air to the freezing chamber 12. Road 22, the connecting pipe 23 for cooling air to flow from the freezing air duct 22 to the refrigeration air duct 21, and the first return air duct 24 for the cooling air to flow back from the refrigerator compartment 11 to the freezing air duct 22, in order to realize the cooling of the cold air to the refrigerator compartment 11 and For the cooling of the freezing chamber 12, the refrigerator involved in the present invention also has a fan 3 arranged in the freezing air duct 2 to drive cold air to flow.

Specifically, during the operation of the refrigerator, the fan 3 starts to drive the cold air in the freezing air duct 22 to flow. As shown in Figures 5 and 6, most of the cold air flows directly to the freezing chamber 12 to cool down the inside of the freezing chamber 12. Part of the cold air enters the refrigerating air duct 21 through the communication pipe 23 , and flows from the air outlet 210 of the refrigerating air duct 21 to the refrigerating room 11 to cool down the inside of the refrigerating room 11 . As shown in FIG. 2 and FIG. 3 , for the refrigerating room 11 , in order to ensure the air pressure balance inside, part of the cold air inside enters the first return air duct 24 and returns to the inside of the freezing air duct 22 .

During the specific implementation of the present invention, the refrigerator also has a second return air duct 25 for returning the cold air from the freezing chamber 12 to the freezing air duct 22 . For the freezer compartment 12 , during the working process of the fan 3 , in order to ensure the air pressure balance inside the freezer compartment 12 , part of the cold air inside the freezer compartment 12 also returns to the inside of the freezer duct 22 through the second return air duct 25 .

In other embodiments of the present invention, the communication pipe 23 may also be set to communicate with the freezing chamber 12 and the refrigerating air duct 21, so that cold air enters the refrigerating air duct 21 from the freezing chamber 12, which is not shown in the specific figure.

During the specific operation of the refrigerator, since the set temperature of the freezer compartment 12 is lower than that of the refrigerated compartment 11, for example, the refrigerated temperature is 5°C, and the freezing temperature is -18°C. In this way, during the operation of the refrigerator, the cooling time of the freezing room 12 is often longer than that of the refrigerating room 11, that is, after the refrigerating room 11 reaches the target temperature set by the user, there is no need to continue to provide cold air to the inside of the refrigerating room 11. It is also necessary to continue to provide cold air to the inside of the freezer compartment 12 .

Based on this, the present invention is provided with a first damper 51 for opening and closing the communication duct 23, as shown in Fig. 6 and Fig. end 230; of course it can be understood that, in other embodiments of the present invention, the first damper 51 can also be disposed inside the communication duct 23 or at the air outlet end. When the first damper 51 is opened, the cold air in the freezing air duct 22 flows to the freezing air duct 22 through the connecting pipe 23; when the first damper 51 is closed, the refrigeration air duct 21 and the freezing air duct 22 are cut off, so that the refrigeration air duct 21 no longer provides cold air to the refrigerator compartment 11.

In a specific implementation process, after the first damper 51 is closed, the freezing air duct 22 needs to continue to provide cool air to the inside of the freezing chamber 12 to continue cooling down the inside of the freezing chamber 12 . At this time, if the first return air duct 24 is connected between the refrigerating room 11 and the freezing air duct 22, there will be the following problems: the running fan 3 will cause a certain negative pressure inside the refrigerating room 11, and due to the negative pressure The hot air outside the refrigerator compartment 11 will enter the interior through the gap in the door body and form condensation on the top of the refrigerator compartment 11, and due to the hot air entering, the temperature in the refrigerator compartment 11 will also rise rapidly.

In view of this, the present invention also has the following design in the specific implementation process: the refrigerator also has a second damper 52 for opening and closing the first return air duct 24, as shown in Figure 3 and Figure 4, in this specific embodiment, the second The damper 52 is disposed at one end of the first return air duct 24 close to the refrigerator compartment 11 , that is, at the position of the second cold air inlet port 240 shown in the figure. Referring to the design of the first damper 51 , the second damper 52 may also be located inside or at the outlet of the first return air duct 24 (specifically not shown in the figure).

Based on the above, the refrigerating chamber involved in the refrigerator of the present invention has a cooling state and a heat preservation state. When the refrigerating room 11 is in the cooling state, both the first air door 51 and the second air door 52 are opened, the cold air in the freezing air duct 22 flows to the refrigerating air duct 21 through the communication pipe 23, and the cold air in the refrigerating room 11 passes through the first return air. The channel 24 returns to the freezing air channel 22; when the refrigerating chamber 11 is in the heat preservation state, the first damper 51 and the second damper 52 are closed to stop the flow of cold air through the communicating duct 23 and the first return air duct 24.

Since the first damper 51 and the second damper 52 are provided at the same time in the present invention, it is possible to effectively solve the problem of condensation on the top of the refrigerator compartment 11 while ensuring that the refrigerator compartment 11 and the freezer compartment 12 are normally refrigerated; The recovery speed of the temperature inside the refrigerator compartment 11 reduces the energy consumption of the refrigerator.

As shown in FIG. 2 to FIG. 7 , the refrigerating air duct 22 in this embodiment is divided into two communicating first refrigerating air ducts 221 and second refrigerating air ducts 222 . During the operation of the fan 3 of the refrigerator, the cold air flows from the first refrigerating air duct 221 to the second refrigerating air duct 222 , the first return air duct 24 communicates with the refrigerating room 11 and the first refrigerating air duct 221 , and the communicating duct 23 communicates with the refrigerating air duct 221 . The duct 21 is connected to the second freezing air duct 222 . The second freezing air duct 222 is connected to the freezing compartment 12 to provide cold air to the freezing compartment 12 . The second return air duct 25 is connected to the freezing compartment 12 and the first freezing air duct 221 .

Based on this setting method, the first refrigerating air duct 221 is equivalent to the return air collection area of the refrigerating room 11 and the freezing room 12, that is, the cold air inside the refrigerating room 11 and the freezing room 12 all flows back to the first refrigerating air duct 221, and passes through the second air duct. A refrigerating air duct 221 flows to the second refrigerating air duct 222 , and then enters the freezing compartment 12 or enters the refrigerating compartment 11 through the refrigerating air duct 21 .

In this specific embodiment, as shown in Fig. 5, Fig. 6, and Fig. 7, the first refrigerating air passage 221 and the second refrigerating air passage 222 are communicated through a communication port (not marked in the figure), and the fan 3 is at the position of the communication port It is arranged to drive cold air from the first freezing chamber 221 to the second freezing chamber 222 . During the circulation of cold air, the fan 3 is used to drive the flow of cold air. In other embodiments of the present invention, the blower 3 is not limited to be disposed at the communication port, and may also be disposed near the communication port or other positions that can drive the flow of cold air.

The refrigerator involved in the present invention is also provided with an evaporator 4 for cooling the cold air. In this specific embodiment, the evaporator 4 is arranged in the first refrigerating air duct 221 . Specifically, when both the first damper 51 and the second damper 52 are open, the cold air returned from the refrigerating chamber 11 and the freezing chamber 12 to the first freezing air passage 221 is cooled by the evaporator 4 and then blown to the refrigerator by the fan 3 again. chamber 11 and freezing chamber 12 to cool down; when the first damper 51 and the second damper 52 are closed, only the cold air inside the freezing chamber 12 flows back into the first freezing air duct 221, and passes through the fan after being cooled by the evaporator 4. 3 Blow to the freezer compartment 12 to cool down.

To facilitate automatic control, the first damper 51 and the second damper 52 involved in the present invention are both electric dampers. Specifically, the control of the first air door 51 and the second air door 52 is automatically controlled by the electrical signal during the operation of the refrigerator, mainly through the signal of "whether refrigeration is required" in the refrigerator room 11. For the specific control method, please refer to the following The text describes the content. In addition, the electric damper shown in this embodiment is not limited to the rotary opening and closing method shown in the figure, and it can also be designed in other ways that can realize pipeline conduction or closure. For details, please refer to some existing dampers The design structure is not expanded here.

Based on the above design structure of the anti-condensation refrigerator, the present invention also provides a method for operating the refrigerator, which includes the following steps:

The refrigerating room enters the cooling state, the first damper 51 and the second damper 52 are opened, the refrigerating air channel 21 provides cold air to the refrigerating room 12, and continuously detects and judges whether the temperature inside the refrigerating room 11 is higher than the refrigerating temperature set by the user. Specifically, during implementation, a temperature sensor (not shown in the figure) for sensing the current temperature is provided inside the refrigerator compartment 11 .

If the temperature inside the refrigerating chamber 11 is higher than the refrigerating temperature set by the user, and it is necessary to continue cooling the refrigerating chamber 11, the first damper 51 and the second damper 52 remain open, and the freezing air duct 22 or the freezing chamber 12 will The cold air flows to the refrigerating air duct 21 through the communication pipe 23 to cool down the inside of the refrigerating room 12, and the cold air in the refrigerating room 12 flows back to the refrigerating air duct 22 through the first return air duct 24;

If the temperature inside the refrigerating chamber 11 is not higher than the refrigerating temperature set by the user, and there is no need to further cool down the refrigerating chamber 11, then the first damper 51 and the second damper 52 are closed, and the refrigerating chamber 11 enters a heat preservation state to terminate the passage of cold air. The pipeline 23 and the first return air duct 24 communicate. During this process, the cold air inside the freezing air duct 22 only flows to the inside of the freezer compartment 12; certainly, in some cases, for example, after the temperatures in the freezer compartment 11 and the freezer compartment 12 all reach the target temperature, the fan 3 will stop running to avoid Unnecessary energy consumption.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in 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 for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims (8)

1. An anti-condensation refrigerator, comprising a refrigerating chamber, a freezing chamber, a refrigerating air duct providing cold air to the refrigerating chamber, a refrigerating air duct providing cold air to the freezing chamber, and supplying cold air from the refrigerating air duct or freezing The connecting pipe from the room to the refrigerating air channel, the first return air channel for the cold air to return from the refrigerating room to the freezing air channel, and the fan installed in the freezing air channel to drive the cold air to flow; it is characterized in that, The refrigerator also has a first damper for opening and closing the communication duct and a second damper for opening and closing the first return air duct, the refrigerator compartment has a cooling state and a heat preservation state, and is configured as follows: the refrigerator compartment When in the cooling state, both the first damper and the second damper are opened, the cold air in the freezing air passage or the freezing chamber flows to the refrigeration air passage through the communication pipe, and the cold air in the refrigeration chamber flows through the refrigerating air passage. The first return air duct returns to the freezing air duct; when the refrigerating room is in a heat preservation state, both the first air door and the second air door are closed to stop cold air from passing through the communicating duct and the first air duct. Return air duct circulation. 2. The anti-condensation refrigerator according to claim 1, wherein the refrigerating air duct is divided into two connected first refrigerating air ducts and second refrigerating air ducts, and the cold air is blown by the first refrigerating air duct. The air passage flows to the second refrigeration air passage, the first return air passage communicates with the refrigerator compartment and the first refrigeration air passage, and the communication pipe communicates the refrigeration air passage with the second refrigeration air passage , the second refrigerating air duct is connected to the freezing compartment to provide cold air to the freezing compartment. 3. The anti-condensation refrigerator according to claim 2, wherein the first refrigerating air duct communicates with the second refrigerating air duct through a communication port, and the fan is located at or near the communication port. The position of the communicating port is set to drive cold air from the first freezing chamber to the second freezing chamber. 4. The anti-condensation refrigerator according to claim 3, characterized in that, an evaporator for cooling the cold air inside is provided in the first freezing air duct. 5. The anti-condensation refrigerator according to any one of claims 2-4, characterized in that, the refrigerator also has a second return air flow for the cold air to flow back from the freezing chamber to the first freezing air duct road. 6 . The anti-condensation refrigerator according to claim 1 , wherein both the first damper and the second damper are electric dampers. 7 . The anti-condensation refrigerator according to claim 6 , wherein the first damper and the second damper are respectively provided at the cold air inlet ends of the communicating duct and the first return air duct. 8 . 8. A method for operating the anti-condensation refrigerator according to any one of claims 1-7, characterized in that it comprises the following steps: The refrigerating room enters the cooling state, the first damper and the second damper are opened, the refrigerating air channel provides cold air to the refrigerating room, and continuously detects and judges whether the temperature inside the refrigerating room is higher than the user's setting. fixed refrigeration temperature, If so, the first air door and the second air door are kept open, and the cold air in the freezing air channel or the freezing room flows to the refrigerating air channel through the communication pipe to cool down the inside of the refrigerating room. The cold air in the refrigerating chamber flows back to the freezing air duct through the first return air duct; If not, the first damper and the second damper are closed, and the refrigerating chamber enters a heat preservation state to stop the circulation of cold air through the communication duct and the first return air duct.