Drawer-type refrigerator capable of intelligent defrosting

Abstract

Disclosed in the present invention is a drawer-type refrigerator capable of intelligent defrosting, comprising a refrigerating chamber provided inside a vehicle-mounted refrigerator. A drawer-type storage compartment which can extend from the front end is provided at the lower part of the inner side of the refrigerating chamber, a cooling chamber is provided at the rear part of the refrigerating chamber, an evaporator is mounted inside the cooling chamber, a cooling fan is mounted on the side of the upper end of the cooling chamber facing the refrigerating chamber, an infrared position detection unit is mounted at the top of the refrigerating chamber close to the front end, a plurality of partition plates are mounted in the drawer-type storage compartment, a dehumidification unit is mounted at the top of the refrigerating chamber, the vehicle-mounted refrigerator further comprises a compressor, the compressor is connected to the evaporator, and a defrosting heating tube is mounted on the evaporator. The opening time and the opening degree of the drawer-type storage compartment can be detected, so that the accumulated refrigeration time of the refrigerator can be calculated relatively accurately, and the calculated time is compared with a set threshold, so that a defrosting program can be initiated according to actual usage conditions.

Description

A smart defrosting drawer refrigerator Technical Field

[0001] This invention relates to the field of vehicle refrigerator technology, specifically to an intelligent defrosting drawer-type refrigerator and its defrosting control method. Background Technology

[0002] Car refrigerators are common household appliances. Currently, drawer-type car refrigerators are often installed in the front armrest of cars, typically using air cooling. Because drawer-type car refrigerators are opened frequently, humid air from outside gradually enters the refrigerator compartment. This humid air, under the forced circulation of the fan, quickly adheres to the cool surface of the evaporator, causing it to frost rapidly. Therefore, defrosting is necessary. Currently, intelligent defrosting drawer-type refrigerators generally use a timed defrosting method. After the compressor runs for a fixed period, the defrosting heating element activates, heating the evaporator to achieve defrosting. This method does not take into account the various situations in actual use of the refrigerator. In actual use, the usage scenarios and conditions of car refrigerators are very complex and diverse. For example, if the user opens the door many times in a certain period of time, defrosting is required immediately. If the refrigerator's running time has not yet reached the threshold of the defrosting heating rod's working time set in the software, and the defrosting heating rod still does not start after a period of time, the refrigerator's cooling performance will drop rapidly due to severe frost buildup on the evaporator. In severe cases, the refrigerator may stop cooling altogether, causing food or medicine in the storage space to expire or be damaged, seriously affecting the user experience. Summary of the Invention

[0003] This invention provides an intelligent defrosting drawer-type refrigerator, which can effectively solve the problem that the refrigerator's running time and the degree of frost on the evaporator are mismatched due to various usage scenarios in actual applications, resulting in irregular frost on the evaporator and thus affecting the refrigerator's cooling performance. To achieve the above objectives, in a first aspect, the present invention provides the following technical solution: an intelligent defrosting drawer-type refrigerator, comprising a refrigeration chamber disposed inside a vehicle refrigerator, a drawer-type storage compartment extending from the front end disposed on the lower inner side of the refrigeration chamber, a cooling chamber disposed at the rear of the refrigeration chamber, an evaporator installed inside the cooling chamber, a cold air fan installed on the upper end of the cooling chamber facing the refrigeration chamber, an air inlet disposed at the lower part of the cooling chamber, an infrared position detection unit installed at the top of the refrigeration chamber near the front end, multiple partition plates installed in the drawer-type storage compartment, the infrared position detection unit sensing the position of the partition plates when the drawer-type storage compartment is pulled out and moved, a dehumidification unit installed at the top of the refrigeration chamber, the vehicle refrigerator further comprising a compressor connected to the evaporator, a defrosting heating element installed on the evaporator, a Hall sensor installed on the drawer-type storage compartment or the refrigeration chamber, and a controller installed on the vehicle refrigerator, the controller being connected to the compressor, the infrared position detection unit, the cold air fan, and... The Hall sensor is electrically connected to the defrost heating element.

[0004] Preferably, the dehumidification unit is enclosed in an installation compartment outside the refrigerator compartment, and a dehumidification pack and a humidity sensor are installed inside the dehumidification unit. Preferably, a panel is provided at the front end of the drawer-type storage compartment, and a sealing strip is provided between the panel and the front end of the refrigerator compartment. Secondly, the present invention also provides a defrosting control method for a drawer-type refrigerator with intelligent defrosting according to the first aspect, comprising the following steps:

[0005] The controller integrates a timing module to monitor the operation of the vehicle refrigerator. The timing module continuously times the cumulative running time t3 of the compressor. When the drawer-type storage compartment is opened, the Hall sensor receives the signal and transmits it to the controller. The timing module times the time t1 when the drawer-type storage compartment is opened. At the same time as the drawer-type storage compartment is opened, the infrared position detection unit detects the position of the partition plate inside the drawer-type storage compartment to determine the distance the drawer-type storage compartment is pulled out and to judge the degree of opening of the drawer-type storage compartment.

[0006] If a cumulative cooling time threshold t is set, the cumulative cooling time t2 of the refrigerator is calculated using the following formula: t2 = K × door opening time t1 + compressor cumulative running time t3. In this formula, K is a constant, a multiple of the door opening time, selected based on the position of the partition plates detected by the infrared position detection unit. The more partition plates detected, the larger the value of K. During refrigerator operation, if the drawer-type storage compartment is not opened, the cumulative cooling time t2 is equal to the compressor cumulative running time t3, as shown in the above formula. When the compressor cumulative running time t3 reaches the cooling time threshold t, the controller activates the defrost heating element to heat the evaporator, thus defrosting.

[0007] During refrigerator operation, if the drawer-type storage compartment is opened, the total time the door is open during refrigerator operation is calculated according to the above formula to obtain the cumulative cooling time of the refrigerator. After the refrigerator door is closed, the cumulative cooling time is compared with the cumulative cooling time threshold t set in the software. If t2 ≥ t, the defrosting process control program is started; if t2 < t, the refrigerator continues to run. Preferably, when the Hall sensor detects that the drawer-type storage compartment is opened, the controller controls the cooling fan to increase the output airflow by 50%-100%. The more the drawer-type storage compartment is opened, the greater the airflow output of the cooling fan. Preferably, the value of K is in the range of 80 to 240. Compared with the prior art, the beneficial effects of the present invention are:

[0008] It can detect the time and degree to which the drawer-type storage compartment is opened, thereby accurately calculating the refrigerator's cumulative cooling time. By comparing the calculated time with a set threshold, the defrosting program can be activated according to actual usage conditions. This effectively solves the problem of mismatch between refrigerator running time and evaporator frost levels caused by various usage scenarios, resulting in irregular evaporator frost formation and affecting the refrigerator's cooling performance. Attached Figure Description

[0009] Figure 1 is a front sectional view of the present invention;

[0010] Figure 2 is a front sectional view of the drawer-type storage compartment of the present invention in the extended state;

[0011] Figure 3 is a schematic flowchart of the defrosting control method of the present invention. Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. As shown in Figures 1-3, this invention provides an intelligent defrosting drawer-type refrigerator, including a refrigeration chamber 1 located inside a vehicle refrigerator. A drawer-type storage compartment 2, extending from the front end, is located on the lower inner side of the refrigeration chamber 1. A cooling chamber 7 is located at the rear of the refrigeration chamber 1, and an evaporator 8 is installed inside the cooling chamber 7. A cooling fan 6 is installed on the upper end of the cooling chamber 7 facing the refrigeration chamber 1. An air inlet 10 is located at the lower part of the cooling chamber 7. An infrared position detection unit 3 is installed at the top of the refrigeration chamber 1 near the front end. Multiple partition plates 11 are installed inside the drawer-type storage compartment 2. When the drawer-type storage compartment 2 is pulled out and moved, the infrared position detection unit 3 senses the position of the partition plates 11. A dehumidification unit 5 is installed at the top of the refrigeration chamber 1. The vehicle refrigerator also includes a compressor 9, which is connected to the evaporator 8. A defrosting heating element is installed on the evaporator 8. The drawer-type storage compartment 2 or the refrigeration chamber 1... A Hall sensor is installed on the refrigerator, and a controller is also installed on the refrigerator. The controller is electrically connected to the compressor 9, infrared position detection unit 3, cold air fan 6, Hall sensor, and defrost heating tube. Specifically, the extension and retraction of the drawer-type storage compartment 2 can be operated manually or electrically. After the drawer-type storage compartment 2 is opened, the humid air outside will enter the refrigerator cavity 1. Therefore, the larger the drawer-type storage compartment 2 is opened, the more humid air enters the refrigerator cavity 1. Therefore, the amount of humid air entering is very important for when the evaporator 8 starts defrosting. Sometimes, users only need to check the items in the drawer-type storage compartment 2, so there's no need to pull out the entire compartment. The divider 11 can categorize and separate the items inside. The divider 11 is detected by the infrared position detection unit 3 as the drawer-type storage compartment 2 is pulled out. The more dividers 11 detected by the infrared position detection unit 3, the greater the distance the drawer-type storage compartment 2 is pulled out. The cooling fan 6 is located at the top of the refrigerator compartment 1, blowing air cooled by the evaporator 8 into the refrigerator compartment 1, working in conjunction with the air inlet 10 to achieve cold air circulation within the refrigerator compartment 1. The dehumidification unit 5 dehumidifies the air inside the refrigerator compartment 1, reducing the rate of frost formation on the evaporator 8 and decreasing the frequency of defrosting.In this embodiment, as shown in Figures 1-2, the infrared position detection unit 3 includes an inclined convex compartment installed outside the refrigerator cavity 1 and an infrared sensor installed inside the inclined convex compartment. A transparent bottom cover is installed at the bottom of the inclined convex compartment to protect the infrared sensor. Simultaneously, as shown in Figures 1-2, the dehumidification unit 5 encloses an installation compartment installed outside the refrigerator cavity 1. The dehumidification unit 5 contains a dehumidification pack and a humidity sensor. The humidity sensor monitors the humidity inside the refrigerator cavity 1 and transmits the data to the controller. The dehumidification pack can be a desiccant, desiccant, carbon pack, or sponge, etc., capable of quickly absorbing moisture inside the refrigerator cavity 1. To improve the sealing of the refrigerator cavity 1 and prevent external humid air from entering, a panel is provided at the front end of the drawer-type storage compartment 2, and a sealing strip 4 is provided between the panel and the front end of the refrigerator cavity 1.This embodiment also provides the defrosting control method for the above-mentioned intelligent defrosting drawer refrigerator, including the following steps: The controller is integrated with a timing module to monitor the operation of the vehicle refrigerator. The timing module always times the cumulative running time t3 of the compressor 9. When the drawer storage compartment 2 is opened, the Hall sensor receives the signal and transmits it to the controller. The timing module times the opening time t1 of the drawer storage compartment 2. At the same time as the drawer storage compartment 2 is opened, the infrared position detection unit 3 detects the position of the partition plate 11 inside the drawer storage compartment 2 to determine the distance the drawer storage compartment 2 is pulled out and to judge the degree of opening of the drawer storage compartment 2. A cumulative cooling time threshold t is set, and the cumulative cooling time t2 of the refrigerator is calculated according to the following formula: t2 = K × door opening time t1 + compressor cumulative running time t3 Where K is a constant, a multiple of the door opening time, and is selected according to the position of the partition plate 11 detected by the infrared position detection unit 3. The more partition plates 11 are detected, the higher K is. The larger the value selected, the greater the value of K, where the range of K is 80 to 240. For example, if there are two partition plates 11, when the infrared position detection unit 3 does not detect partition plates 11, the value of K is 80; if one partition plate 11 is detected, the value of K is 160; when two partition plates 11 are detected, the value of K is 240. During the operation of the refrigerator, if the drawer-type storage compartment 2 is not opened, the cumulative cooling time t2 of the refrigerator can be calculated according to the above formula and is equal to the cumulative running time t3 of the compressor 9. When the cumulative running time t3 of the compressor 9 reaches the cooling time setting threshold t, the controller controls the defrosting heating tube to start, heating the evaporator 8 to achieve defrosting. During the operation of the refrigerator, if the drawer-type storage compartment 2 is opened, the calculation is performed according to the above formula, and the total time the refrigerator is open during operation is accumulated to obtain the cumulative cooling time of the refrigerator. After the refrigerator door is closed, the cumulative cooling time of the refrigerator is compared with the cumulative cooling time setting threshold t in the software. If t2 ≥ t, The defrosting process control program is then initiated. If t2 < t, the refrigerator continues to run. When the Hall sensor detects that the drawer-type storage compartment 2 is opened, the controller controls the cooling fan 6 to increase its output airflow by 50%-100%. The more the drawer-type storage compartment 2 is opened, the greater the airflow output of the cooling fan 6. Increasing the output airflow of the cooling fan 6 when the drawer-type storage compartment 2 is open can largely prevent external humid air from entering the refrigerator compartment 1, thus extending the interval between defrosting program initiation.It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, in the present invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the present invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in this invention can be understood according to the specific circumstances. Furthermore, the technical solutions of the various embodiments of this invention can be combined with each other, but only on the basis that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A drawer-type refrigerator with intelligent defrosting function, characterized in that, The refrigerator includes a refrigeration chamber (1) located inside the vehicle refrigerator. A drawer-type storage compartment (2) extending from the front end is located on the lower inner side of the refrigeration chamber (1). A cooling chamber (7) is located at the rear of the refrigeration chamber (1). An evaporator (8) is installed inside the cooling chamber (7). A cooling fan (6) is installed on the upper end of the cooling chamber (7) facing the refrigeration chamber (1). An air inlet (10) is located at the lower part of the cooling chamber (7). An infrared position detection unit (3) is installed at the top of the refrigeration chamber (1) near the front end. Multiple partition plates (11) are installed inside the drawer-type storage compartment (2). When the drawer-type storage compartment (2) is pulled out and moved, the infrared position detection unit (3) senses the position of the partition plates (11). A dehumidification unit (5) is installed at the top of the refrigeration chamber (1). The vehicle refrigerator also includes a compressor (9), which is connected to an evaporator (8). A defrosting heating tube is installed on the evaporator (8). A Hall sensor is installed on the drawer-type storage compartment (2) or the refrigeration chamber (1). The vehicle refrigerator is also equipped with a controller, which is electrically connected to the compressor (9), the infrared position detection unit (3), the cold air fan (6), the Hall sensor, and the defrosting heating tube.

2. The intelligent defrosting drawer refrigerator according to claim 1, characterized in that: The infrared position detection unit (3) includes an inclined convex compartment installed outside the refrigeration chamber (1) and an infrared sensor installed inside the inclined convex compartment. A transparent bottom cover is installed at the bottom of the inclined convex compartment.

3. The intelligent defrosting drawer refrigerator according to claim 1, characterized in that: The dehumidification unit (5) is enclosed in the installation compartment outside the refrigeration chamber (1), and a dehumidification bag and a humidity sensor are installed inside the dehumidification unit (5).

4. The intelligent defrosting drawer refrigerator according to claim 1, characterized in that: The front end of the drawer-type storage compartment (2) is provided with a panel, and a sealing strip (4) is provided between the panel and the front end of the refrigeration chamber (1).

5. A defrosting control method for a drawer-type refrigerator with intelligent defrosting according to any one of claims 1-4, characterized in that, The process includes the following steps: The controller is equipped with a timing module to monitor the operation of the vehicle refrigerator. The timing module always times the cumulative running time t3 of the compressor (9). When the drawer-type storage compartment (2) is opened, the Hall sensor receives the signal and transmits it to the controller. The timing module times the time t1 when the drawer-type storage compartment (2) is opened. At the same time as the drawer-type storage compartment (2) is opened, the infrared position detection unit (3) detects the position of the partition plate (11) in the drawer-type storage compartment (2) to determine the distance the drawer-type storage compartment (2) is pulled out and to judge the degree of opening of the drawer-type storage compartment (2). The cumulative cooling time threshold t is set, and the cumulative cooling time t2 of the refrigerator is calculated according to the following formula: t2=K×door opening time t1 + compressor cumulative running time t3 Where K is a constant, a multiple of the door opening time, and is selected according to the position of the partition plate (11) detected by the infrared position detection unit (3). The more partition plates (11) detected, the larger the value of K is selected. During refrigerator operation, if the drawer-type storage compartment (2) is not opened, the cumulative cooling time t2 of the refrigerator can be calculated according to the above formula and is equal to the cumulative running time t3 of the compressor (9). When the cumulative running time t3 of the compressor (9) reaches the set threshold t of the cooling time, the controller controls the defrosting heating tube to start and heat the evaporator (8) to achieve defrosting. During refrigerator operation, if the drawer-type storage compartment (2) is opened, the calculation is performed according to the above formula, and the total time the refrigerator is open during operation is accumulated to obtain the cumulative cooling time of the refrigerator. After the refrigerator is closed, the cumulative cooling time of the refrigerator is compared with the set threshold t of the cumulative cooling time of the refrigerator in the software. If t2≥t, the defrosting process control program is started. If t2<t, the refrigerator continues to run.

6. The defrosting control method for a drawer-type refrigerator with intelligent defrosting according to claim 5, characterized in that: When the Hall sensor detects that the drawer-type storage compartment (2) is opened, the controller controls the cooling fan (6) to increase the output air force by 50%-100%. The more the drawer-type storage compartment (2) is opened, the greater the output air force of the cooling fan (6).

7. The defrosting control method for an intelligent defrosting drawer-type refrigerator according to claim 5, characterized in that: The value of K ranges from 80 to 240.

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