Refrigerator and refrigerator door opening detection method

Abstract

The application discloses a refrigerator and a refrigerator door opening detection method. The refrigerator comprises a refrigerating chamber (10) and a freezing chamber (20) arranged in an up-down mode, and a gas pressure detection device (30) is arranged at the connection position of the refrigerating chamber (10) and the freezing chamber (20). The gas pressure detection device (30) can be used for detecting the gas pressure in the refrigerating chamber (10) and the freezing chamber (20), and judging the closing condition of the cabinet door of the refrigerating chamber (10) and the freezing chamber (20) according to the detection result. Compared with the prior art, the application can judge whether the cabinet door of the refrigerator is closed well through the gas pressure detection device (30), and can avoid the problem that the food is spoiled due to the temperature rise of the refrigerator storage environment caused by the fact that the cabinet door of the refrigerator is not closed tightly.

Description

Technical Field

[0001] This invention relates to the field of refrigeration, and in particular to a refrigerator and a method for detecting the opening and closing of a refrigerator door. Background Technology

[0002] Refrigerators are a common food storage tool. In our daily use, we take out and put in food. However, when closing the door, we usually just close it casually or forget to close it after taking things out, which damages the refrigerator's sealing structure, causing air to circulate between the refrigerator and the outside, resulting in the loss of cold air, damaging the food preservation environment, and causing a great waste of electricity.

[0003] Additionally, if the cabinet door is not closed tightly, a large amount of condensation will accumulate at the refrigerator door, affecting the preservation of food inside the refrigerator.

[0004] Furthermore, when the refrigerator door is opened and closed, the airflow from the door causes a large amount of hot gas to enter the refrigerator compartment. If this gas is not cooled to a normal temperature, it will take a very long time to cool down, during which time food spoilage will be accelerated.

[0005] At this time, the refrigerator's air extraction system can effectively remove most of the high-temperature air that has just entered, and then re-inject low-temperature gas, thereby ensuring the freshness of food inside the refrigerator and preventing temperature fluctuations.

[0006] Therefore, designing a refrigerator and a refrigerator door opening and closing detection method that can prevent the refrigerator door from being unable to open and close properly, thus affecting the normal internal temperature preservation environment and accelerating food spoilage, is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0007] In response to the problem in existing technologies that refrigerator doors that do not open and close properly can affect the normal temperature preservation environment inside the refrigerator and accelerate food spoilage, this invention proposes a refrigerator and a method for detecting refrigerator door opening and closing.

[0008] The technical solution of the present invention is to propose a refrigerator, including a refrigerator compartment (10) and a freezer compartment (20) arranged vertically, and a pressure detection device (30) is provided at the connection between the refrigerator compartment (10) and the freezer compartment (20);

[0009] The air pressure detection device (30) can be used to detect the air pressure in the refrigerator compartment (10) and the freezer compartment (20), and determine the closing status of the cabinet doors of the refrigerator compartment (10) and the freezer compartment (20) based on the detection results.

[0010] Furthermore, a refrigeration exhaust device (101) is provided in the refrigeration compartment (10), and a first contact switch (102) is provided at the cabinet door of the refrigeration compartment (10).

[0011] When the cabinet door of the refrigerator compartment (10) is closed, the first contact switch (102) is triggered to activate the refrigerator exhaust device (101).

[0012] Furthermore, a refrigeration extraction device (201) is provided in the freezer compartment (20), and a second contact switch (202) is provided at the cabinet door of the freezer compartment (20);

[0013] When the door of the freezer compartment (20) is closed, the second contact switch (202) is triggered to activate the freezer vacuum device (201).

[0014] Furthermore, a refrigeration air inlet (103) is provided on the refrigeration compartment (10), and the refrigeration air inlet (103) is connected to the outside to obtain outside air into the refrigeration compartment (10);

[0015] A freezing air inlet (203) is provided on the freezing chamber (20), and the freezing air inlet (203) is connected to the outside to obtain outside air into the freezing chamber (20).

[0016] Furthermore, the air pressure detection device (30) has three output signals;

[0017] When the air pressure in the refrigerator compartment (10) is the same as the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a first signal;

[0018] When the air pressure in the refrigerator compartment (10) is lower than the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a second signal;

[0019] When the air pressure in the refrigerator compartment (10) is higher than the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a third signal.

[0020] The present invention also proposes a refrigerator door opening and closing detection method using the above-mentioned refrigerator, which includes:

[0021] When the refrigerator door is closed, the corresponding air extraction device is triggered by the first contact switch (102) or the second contact switch (202);

[0022] Acquire the signal output by the air pressure detection device (30);

[0023] Based on the signal output by the air pressure detection device (30) and the opening status of the refrigerator door, determine whether the refrigerator door is closed normally.

[0024] Furthermore, based on the signal output by the air pressure detection device (30) and the opening status of the refrigerator door, it is determined whether the refrigerator door is properly closed, including:

[0025] When the refrigerator door is open in the case of the refrigerator compartment (10) door being open,

[0026] Determine whether the signal output by the air pressure detection device (30) is the second signal;

[0027] If so, then the refrigerator door is determined to be closed normally.

[0028] Furthermore, based on the signal output by the air pressure detection device (30) and the opening status of the refrigerator door, it is determined whether the refrigerator door is properly closed, including:

[0029] When the refrigerator door is open in the manner that the freezer compartment (20) door is open,

[0030] Determine whether the signal output by the air pressure detection device (30) is a third signal;

[0031] If so, then the refrigerator door is determined to be closed normally.

[0032] Furthermore, when the refrigerator doors are both open in the refrigerator compartment (10) and the freezer compartment (20), the refrigerator door opening / closing detection method further includes:

[0033] First, close the cabinet door of the refrigerator compartment (10), and determine whether the cabinet door of the refrigerator compartment (10) is closed normally according to the signal output by the air pressure detection device (30);

[0034] After determining that the refrigerator compartment (10) door is closed normally, close the freezer compartment (20) door;

[0035] Based on the signal output by the air pressure detection device (30), determine whether the cabinet door of the freezer compartment (20) is closed properly.

[0036] Furthermore, in the process of detecting whether the refrigerator door is properly closed, the refrigerator door opening and closing detection method also includes:

[0037] Detect the indoor air pressure in the refrigerator compartment (10) and / or the freezer compartment (20);

[0038] Determine whether the indoor air pressure is less than the threshold air pressure;

[0039] If so, when there is a need to open the cabinet door in the refrigerator compartment (10) and / or the freezer compartment (20), the refrigerator air inlet (103) and / or the freezer air inlet (203) shall be opened.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] This invention can detect whether the refrigerator door is properly closed by using an air pressure detection device (30) after the refrigerator door is closed. At the same time, it reminds users that hot air can enter the refrigerator compartment due to the refrigerator door not being closed tightly, which can cause food spoilage and shorten the shelf life, thus improving the user experience. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overall structure of the refrigerator proposed in this invention;

[0044] Figure 2 This is a schematic diagram of the first signal emitted by the air pressure detection device in this invention;

[0045] Figure 3 This is a schematic diagram of the second signal emitted by the air pressure detection device in this invention;

[0046] Figure 4 This is a schematic diagram of the third signal emitted by the air pressure detection device in this invention;

[0047] Figure 5 This is a flowchart illustrating the overall detection process in this invention.

[0048] Of these, 10 is the refrigerator compartment;

[0049] 20 is the freezer compartment;

[0050] 30 is a barometric pressure detection device;

[0051] 40 is for compressors;

[0052] 101 is a refrigeration exhaust device;

[0053] 102 is the first contact switch;

[0054] 103 is the air inlet for the refrigerator.

[0055] 202 is a refrigeration vacuum device;

[0056] 202 is the second contact switch;

[0057] 203 is the refrigeration air inlet. Detailed Implementation

[0058] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0059] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0060] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0061] As a commonly used food storage device, refrigerators can cause problems if the door is not properly closed when opening and closing. This can allow hot air from outside to enter the refrigerator's interior, resulting in the loss of cold air and disrupting the food preservation environment.

[0062] To address the above problems, this invention proposes a refrigerator, such as... Figure 1 As shown, the refrigerator has a refrigerator compartment 10 and a freezer compartment 20, and the refrigerator compartment 10 and the freezer compartment 20 are arranged vertically, with the refrigerator compartment 10 located above the freezer compartment 20;

[0063] A pressure detection device 30 is installed at the connection between the refrigerator compartment 10 and the freezer compartment 20;

[0064] The air pressure detection device 30 can detect the air pressure in the refrigerator compartment 10 and the freezer compartment 20, and determine whether the cabinet doors of the refrigerator compartment 10 and the freezer compartment 20 are closed based on the detection results.

[0065] Since the air pressure inside the refrigerator is different when the refrigerator door is not closed properly versus when the refrigerator door is properly closed, the air pressure detection device 30 can detect the air pressure in the refrigerator compartment 10 and the freezer compartment 20 respectively. Based on the detection results, it can be determined whether the refrigerator door is closed properly, and then the user can be reminded to close the refrigerator door, thus avoiding problems caused by the refrigerator door not being closed properly.

[0066] The present invention has the following advantages over the prior art:

[0067] This invention can detect whether the refrigerator door is properly closed after it is closed by using an air pressure detection device 30. It also reminds users to avoid hot air entering the refrigerator compartment due to an improperly closed door, which could cause food spoilage and shorten its shelf life, thus improving the user experience.

[0068] In addition, the existing technology also has the following problems:

[0069] When the refrigerator door is opened or closed, air is drawn into the refrigerator compartment through the door, resulting in a large influx of hot air. It takes a long time for this air to cool down to a normal, insulated temperature, during which time food spoils more quickly.

[0070] To address this problem, the present invention provides a refrigeration degassing device 101 and a freezer degassing device 102 in the refrigerator compartment 10 and the freezer compartment 20, respectively.

[0071] The refrigeration air extraction device 101 can extract air from the refrigeration compartment 10 when the cabinet door of the refrigeration compartment 10 is closed, thereby expelling the high-temperature air from the refrigeration compartment 10, and then using the compressor 40 to provide low-temperature air to the refrigeration compartment 10 to maintain the temperature inside the refrigeration compartment 10 and ensure the food storage environment.

[0072] Please see Figure 1 The specific settings for this part are as follows:

[0073] A refrigeration exhaust device 101 is installed in the refrigeration compartment 10, and a first contact switch 102 is installed at the cabinet door of the refrigeration compartment 10.

[0074] When the cabinet door of the refrigerator compartment 10 is closed, the first contact switch 102 is triggered to activate the refrigerator exhaust device 101.

[0075] Here, the first contact switch 102 can be a traditional contact induction switch and is located at the cabinet door of the refrigerator compartment 10. When the cabinet door of the refrigerator compartment 10 is closed, the first contact switch 102 will be triggered, thereby activating the refrigerator air extraction device 101 to extract the high-temperature air in the refrigerator compartment 10.

[0076] The present invention has two main features: firstly, it can quickly remove the high-temperature air brought in when the refrigerator door of the refrigerator 10 is opened and closed; secondly, by extracting the air in the refrigerator 10 and re-injecting low-temperature air, it can quickly reduce the temperature inside the refrigerator 10, thereby meeting the storage requirements of food.

[0077] Furthermore, the refrigeration air extraction device 201 can extract air from the freezer compartment 20 when the freezer compartment door is closed, thereby expelling the high-temperature air from the freezer compartment 20, and then using the compressor 40 to provide low-temperature air to the freezer compartment 20 again, maintaining the temperature inside the freezer compartment 20 and ensuring the food storage environment.

[0078] Please see Figure 1 The specific settings for this part are as follows:

[0079] A refrigeration extraction device 201 is installed in the freezer compartment 20, and a second contact switch 202 is installed at the door of the freezer compartment 20.

[0080] When the freezer door of the freezer compartment 20 is closed, the second contact switch 202 is triggered to activate the freezer vacuum device 201.

[0081] Here, the second contact switch 202 can be a traditional contact induction switch and is located at the door of the freezer compartment 20. When the door of the freezer compartment 20 is closed, the second contact switch 202 will be triggered, thereby activating the freezer extraction device 201 to extract the high-temperature air in the freezer compartment 20.

[0082] The present invention has two main features: firstly, it can quickly remove the high-temperature air brought in when the freezer door of the freezer 20 is opened and closed; secondly, by extracting the air from the freezer 20 and re-injecting low-temperature air, it can rapidly reduce the temperature inside the freezer 20, thereby meeting the food storage requirements.

[0083] Furthermore, since the present invention is equipped with a refrigeration air extraction device 101 and a freezer air extraction device 102, during the process of detecting whether the refrigerator door is closed properly, the air pressure in the refrigeration compartment 10 or the freezer compartment 20 may be too low. If the user happens to need to open the door at this time, the door of the refrigeration compartment 10 or the freezer compartment 20 may not be able to be opened due to the pressure difference.

[0084] Therefore, to address the above-mentioned problems, the present invention also includes a refrigeration air inlet 103 and a freezing air inlet 203. Please refer to [link / reference needed]. Figure 1 Its specific settings are as follows:

[0085] A refrigeration air inlet 103 is provided on the refrigeration compartment 10, and the refrigeration air inlet 103 is connected to the outside to obtain outside air into the refrigeration compartment 10.

[0086] A refrigeration air inlet 203 is provided on the freezer compartment 20, which is connected to the outside to obtain outside air into the freezer compartment 20.

[0087] The aforementioned refrigerator air inlet 103 and freezer air inlet 203 are mainly used to open when the air pressure in the refrigerator compartment 10 or freezer compartment 20 is too low during the process of checking whether the refrigerator door is closed, and the user happens to need to open the door. They are used to replenish a large amount of air into the refrigerator compartment 10 or freezer compartment 20, thereby balancing the air pressure inside the refrigerator compartment 10 or freezer compartment 20 with the outside air pressure, so as to facilitate the normal opening of the refrigerator compartment 10 or freezer compartment 20 door.

[0088] Please see Figures 2 to 4 The air pressure detection device 30 proposed in this invention has three output signals;

[0089] When the air pressure in the refrigerator compartment 10 is the same as the air pressure in the freezer compartment 20, the air pressure detection device 30 outputs the first signal;

[0090] When the air pressure in the refrigerator compartment 10 is lower than the air pressure in the freezer compartment 20, the air pressure detection device 30 outputs a second signal;

[0091] When the air pressure in the refrigerator compartment 10 is higher than the air pressure in the freezer compartment 20, the air pressure detection device 30 outputs a third signal.

[0092] like Figure 2 As shown, this is a schematic diagram of the first signal, which is a smooth straight line;

[0093] like Figure 3 As shown, this is a schematic diagram of the second signal, which is an upward-convex curve;

[0094] like Figure 4 As shown, this is a schematic diagram of the third signal, which is a downward-convex curve.

[0095] Therefore, the different signals output by the air pressure detection device 30 can obtain the air pressure in the refrigerator compartment 10 and the freezer compartment 20, so as to determine whether the refrigerator door is closed properly.

[0096] It should be noted that the air pressure detection device 30 in this invention can be a traditional air pressure detection device without any specific modifications. It is set between the refrigerator compartment 10 and the freezer compartment 20. Based on the air pressure relationship between the refrigerator compartment 10 and the freezer compartment 20, it will naturally output the above three signals. Rather, this invention does not involve any modification to the air pressure detection device 30 to achieve the above effects.

[0097] Based on the above-mentioned refrigerator, the present invention proposes a refrigerator door opening and closing detection method, which includes the following:

[0098] When the refrigerator door is closed, the corresponding air extraction device is triggered by the first contact switch 102 or the second contact switch 202.

[0099] Acquire the signal output by the air pressure detection device 30;

[0100] Based on the signal output by the air pressure detection device 30 and the opening status of the refrigerator door, determine whether the refrigerator door is closed properly.

[0101] The overall detection approach is as follows:

[0102] When the refrigerator door is closed, the corresponding air extraction device is triggered. If the refrigerator compartment 10 door is open, the refrigerator air extraction device 101 is triggered when the refrigerator compartment 10 door is closed.

[0103] If the freezer door 20 is opened, the freezer extraction device 201 will be triggered when the freezer door 20 is closed.

[0104] After the corresponding air extraction device is triggered, the signal output by the air pressure detection device 30 can be obtained;

[0105] Then, based on the signal output by the air pressure detection device 30 and the opening status of the refrigerator door, it is determined whether the refrigerator door is closed normally.

[0106] The detection principle here is that when the refrigerator door is opened, the corresponding air extraction device will extract air when it is closed, thereby reducing the air pressure in the corresponding compartment.

[0107] If the opened cabinet door is the refrigerator compartment 10 door, when the refrigerator compartment 10 door is closed, the air pressure inside the refrigerator compartment 10 will be lower than the air pressure inside the freezer compartment 20. If the refrigerator compartment 10 door is properly closed at this time, the signal output by the air pressure detection device 30 should be the second signal. Therefore, this invention can determine whether the refrigerator compartment 10 door is properly closed based on whether the signal output by the air pressure detection device 30 is the second signal. If it is not the second signal, it indicates that the refrigerator compartment 10 door is not properly closed.

[0108] The detection principle of the freezer compartment 20 is the same as that of the refrigerator compartment 10, and will not be repeated here.

[0109] Therefore, based on the above principle, the "determining whether the refrigerator door is properly closed based on the signal output by the air pressure detection device 30 and the opening status of the refrigerator door" mentioned in this invention includes:

[0110] When the refrigerator door is open in the case of refrigerator compartment 10,

[0111] Determine whether the signal output by the air pressure detection device 30 is the second signal;

[0112] If so, then the refrigerator door is determined to be closed normally.

[0113] "And judging whether the refrigerator door is properly closed based on the signal output by the air pressure detection device 30 and the opening status of the refrigerator door" also includes:

[0114] When the refrigerator door is open in the freezer compartment 20,

[0115] Determine whether the signal output by the air pressure detection device 30 is a third signal;

[0116] If so, then the refrigerator door is determined to be closed normally.

[0117] In summary, the present invention, through the above-described solution, can detect whether the refrigerator door is properly closed, and at the same time remind users that it can prevent hot air from entering the refrigerator compartment due to the refrigerator door not being closed tightly, which can cause food spoilage and shorten the shelf life, thus improving the user experience.

[0118] Furthermore, in other embodiments of the refrigerator, there are cases where the refrigerator compartment 10 and the freezer compartment 20 are opened simultaneously. In this case, the refrigerator door opening and closing detection method also includes:

[0119] First, close the door of the refrigerator compartment 10, and determine whether the door of the refrigerator compartment 10 is closed properly based on the signal output by the air pressure detection device 30.

[0120] After confirming that the refrigerator compartment 10 door is closed properly, close the freezer compartment 20 door;

[0121] Based on the signal output by the air pressure detection device 30, determine whether the freezer door of the freezer compartment 20 is closed properly.

[0122] In this case, the detection approach of the present invention is to first detect whether the door of the refrigerator compartment 10 is closed properly. Only after the refrigerator compartment 10 door is detected and determined to be closed properly will the detection of whether the freezer compartment 20 door is closed properly be started. Only when both detections determine that the door is closed properly will the refrigerator door be considered to be closed properly.

[0123] Furthermore, as mentioned above, since the present invention is equipped with a refrigeration air extraction device 101 and a freezer air extraction device 102, during the process of detecting whether the refrigerator door is closed properly, the air pressure in the refrigeration compartment 10 or the freezer compartment 20 may be too low. If the user happens to need to open the door at this time, the door of the refrigeration compartment 10 or the freezer compartment 20 may not be able to be opened due to the pressure difference.

[0124] To address this issue, the refrigerator door opening and closing detection method of this invention further includes the following steps in the detection process of whether the refrigerator door is properly closed:

[0125] Detect the air pressure inside the refrigerator compartment 10 and / or the freezer compartment 20;

[0126] Determine if the indoor air pressure is lower than the threshold air pressure;

[0127] If so, when there is a need to open the cabinet doors of the refrigerator compartment 10 and / or the freezer compartment 20, the refrigerator air inlet 103 and / or the freezer air inlet 203 shall be opened.

[0128] With the above solution, the refrigerator air inlet 103 and the freezer air inlet 203 are mainly used to open when the air pressure in the refrigerator compartment 10 or freezer compartment 20 is too low during the process of checking whether the refrigerator door is closed, and the user happens to need to open the door. This is to replenish a large amount of air into the refrigerator compartment 10 or freezer compartment 20, thereby balancing the air pressure inside the refrigerator compartment 10 or freezer compartment 20 with the outside air pressure, so as to facilitate the normal opening of the refrigerator compartment 10 or freezer compartment 20 door.

[0129] It should be noted that the threshold pressure mentioned in the above scheme is designed based on the actual situation of the refrigerator. Under this threshold voltage, the pressure difference between the air pressure inside the refrigerator and the outside air pressure is large, which makes it difficult for users to open the refrigerator door.

[0130] Please see Figure 5 This is the overall control flowchart of the present invention, which includes the following steps:

[0131] When the refrigerator door is opened, all air extraction devices are turned off (this is because the air extraction devices are controlled by a contact switch, which cannot be triggered when the refrigerator door is opened, thus turning off the air extraction devices).

[0132] Then, when the refrigerator door is closed, the corresponding compartment's air extraction device is turned on. When the closed door is the refrigerator compartment 10, the corresponding first contact switch 101 is triggered, and the refrigerator air extraction device 101 is started.

[0133] When the closed cabinet door is the freezer compartment 20, the corresponding second contact switch 201 is triggered, and the freezer extraction device 201 is started.

[0134] Then, the corresponding signal is fed back through the air pressure detection device 30;

[0135] The system determines whether the refrigerator door is closed properly based on the signal fed back by the air pressure detection device 30. The specific detection process is as follows:

[0136] When the closed cabinet door is the refrigerator compartment 10, determine whether the signal sent by the air pressure detection device 30 is the second signal. If it is, it indicates that the refrigerator door is closed normally. Otherwise, it indicates that the refrigerator door is not closed properly.

[0137] When the closed cabinet door is the freezer compartment 20, determine whether the signal emitted by the air pressure detection device 30 is the third signal. If it is, it indicates that the refrigerator door is closed normally. Otherwise, it indicates that the refrigerator door is not closed properly.

[0138] If the refrigerator door is determined to be not closed properly, an alarm will be triggered to alert the user to close the door. This is to prevent hot air from entering the refrigerator compartment, which could cause food spoilage and shorten its shelf life.

[0139] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0140] This invention can detect whether the refrigerator door is properly closed after it is closed by using an air pressure detection device 30. It also reminds users to avoid hot air entering the refrigerator cavity due to an improperly closed door, which could cause food spoilage and shorten its shelf life, thus improving the user experience.

[0141] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for detecting the opening and closing of a refrigerator door, the refrigerator comprising a refrigerator compartment (10) and a freezer compartment (20) arranged vertically, characterized in that, A pressure detection device (30) is provided at the connection between the refrigerator compartment (10) and the freezer compartment (20); The air pressure detection device (30) can be used to detect the air pressure in the refrigerator compartment (10) and the freezer compartment (20), and determine the closing status of the cabinet doors of the refrigerator compartment (10) and the freezer compartment (20) based on the detection results; A refrigeration exhaust device (101) is provided in the refrigeration compartment (10), and a first contact switch (102) is provided at the cabinet door of the refrigeration compartment (10). When the cabinet door of the refrigerator compartment (10) is closed, the first contact switch (102) is triggered to activate the refrigerator exhaust device (101); The freezer compartment (20) is equipped with a freezer extraction device (201), and a second contact switch (202) is installed at the cabinet door of the freezer compartment (20). When the door of the freezer compartment (20) is closed, the second contact switch (202) is triggered to activate the freezer vacuum device (201); The air pressure detection device (30) has three output signals; When the air pressure in the refrigerator compartment (10) is the same as the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a first signal; When the air pressure in the refrigerator compartment (10) is lower than the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a second signal; When the air pressure in the refrigerator compartment (10) is higher than the air pressure in the freezer compartment (20), the air pressure detection device (30) outputs a third signal; When the refrigerator door is closed, the corresponding air extraction device is triggered by the first contact switch (102) or the second contact switch (202); The refrigerator door opening / closing detection method includes: Acquire the signal output by the air pressure detection device (30); When the refrigerator door is open, the door of the refrigerator compartment (10) is open, and it is determined whether the signal output by the air pressure detection device (30) is the second signal. If so, then the refrigerator door is determined to be closed normally; When the refrigerator door is open, the door of the freezer compartment (20) is open. Determine whether the signal output by the air pressure detection device (30) is a third signal. If so, then the refrigerator door is determined to be closed normally.

2. The refrigerator door opening / closing detection method according to claim 1, characterized in that, A refrigeration air inlet (103) is provided on the refrigeration compartment (10), and the refrigeration air inlet (103) is connected to the outside to obtain outside air into the refrigeration compartment (10). A freezing air inlet (203) is provided on the freezing chamber (20), and the freezing air inlet (203) is connected to the outside to obtain outside air into the freezing chamber (20).

3. The refrigerator door opening / closing detection method according to claim 1, characterized in that, When the refrigerator door is open in such a way that both the refrigerator compartment (10) door and the freezer compartment (20) door are open, the refrigerator door opening / closing detection method further includes: First, close the cabinet door of the refrigerator compartment (10), and determine whether the cabinet door of the refrigerator compartment (10) is closed normally according to the signal output by the air pressure detection device (30); After determining that the refrigerator compartment (10) door is closed normally, close the freezer compartment (20) door; Based on the signal output by the air pressure detection device (30), determine whether the door of the freezer compartment (20) is closed properly.

4. The refrigerator door opening / closing detection method according to claim 1, characterized in that, In the process of detecting whether the refrigerator door is properly closed, the refrigerator door opening and closing detection method further includes: Detect the indoor air pressure in the refrigerator compartment (10) and / or the freezer compartment (20); Determine whether the indoor air pressure is less than the threshold air pressure; If so, when there is a need to open the cabinet door in the refrigerator compartment (10) and / or the freezer compartment (20), the refrigerator air inlet (103) and / or the freezer air inlet (203) shall be opened.

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