CN105605874B - The detection method of refrigerator and its internal temperature - Google Patents

Abstract

The invention provides a refrigerator and a method for detecting the internal temperature thereof. Wherein the refrigerator includes: a box body, which defines a storage compartment inside; a door body, which is pivotally arranged on the front part of the box body; a door opening detection device, configured to detect the opening and closing state of the door body; a shelf assembly arranged inside the storage compartment to divide the storage compartment into multiple storage spaces; and the infrared sensing component is arranged on the inner wall of the box and configured to detect multiple storage spaces when the door opening detection device detects that the door is in a closed state. The infrared rays emitted by the items placed in each storage space are respectively sensed to determine the surface temperature of the items. With the solution of the present invention, the interference caused by the external heat source to the infrared sensing component after the door is opened is avoided, and the sensing deviation caused by the user’s arm extending into the storage space of the infrared sensing component is prevented, thereby ensuring the smooth operation of the refrigerator .

Description

Refrigerator and its internal temperature detection method

technical field

The invention relates to refrigerating and freezing equipment, in particular to a refrigerator and a detection method for its internal temperature.

Background technique

Traditional refrigerators usually use a temperature sensor arranged inside the storage compartment to sense the temperature around the location where it is arranged, and use the temperature as a basis for refrigeration control.

However, when using this control method to control the refrigerator, when the temperature measured by the temperature sensor is higher than the preset value, the refrigerator starts cooling. During the actual use of the refrigerator, the user will often access the items stored in the compartment. The temperature of the items just placed is generally high, and it takes a certain amount of time for the temperature of the items to be transmitted to the storage space through thermal radiation. The temperature sensed by the temperature sensor will rise only after the temperature of the item is transmitted to the room environment, and the cold source device such as the compressor is started to cool the storage room. During this process, the temperature of the item may be transmitted to other items in contact with it, resulting in a change in the temperature of the food already stored in the refrigerator, resulting in loss of nutrition and reduced storage effect.

Based on the above problems, in the prior art, there is a technical solution that uses infrared sensors to scan the temperature of the items, and senses the infrared rays released by the items in the storage room to determine the surface temperature of the items. The temperature detection speed is faster and the improvement of cooling efficiency. However, the sensing sensitivity of the infrared sensor is relatively high, and the sensing result is prone to be interfered by external heat radiation, which may lead to false start-up of the refrigeration of the refrigerator and affect the reliability of the refrigerator.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a refrigerator and a method for detecting the internal temperature of the refrigerator which overcomes the above problems or at least partly solves the above problems.

An object of the present invention is to provide a method for detecting the internal temperature of a refrigerator that avoids interference from external heat sources.

A further object of the present invention is to improve the operational reliability of the refrigerator.

In particular, the present invention provides a refrigerator. The refrigerator includes: a box body defining a storage compartment inside; a door body pivotally arranged on the front part of the box body; a door opening detection device configured to detect the opening and closing state of the door body; a shelf assembly arranged inside the storage compartment to divide the storage compartment into multiple storage spaces; and the infrared sensing component is arranged on the inner wall of the box and configured to detect multiple storage spaces when the door opening detection device detects that the door is in a closed state. The infrared rays emitted by the items placed in each storage space are respectively sensed to determine the surface temperature of the items.

Optionally, the infrared sensing assembly is arranged in the middle of the inside of the rear wall of the storage space, its infrared sensing direction is set towards the interior of the storage compartment, and the infrared sensing range is limited to the front side of the shelf assembly edge.

Optionally, the infrared sensing assembly includes: a plurality of infrared sensors arranged at intervals along a vertical line on the rear wall of the cabinet, and one infrared sensor is arranged in each storage space.

Optionally, the infrared sensing assembly includes: a vertical transmission part, which is arranged on the rear wall of the box, and has a movable part capable of vertical translational movement; an infrared sensor, fixed on the movable part, driven by the movable part to move within the storage space, so as to sense the multiple storage spaces respectively.

Optionally, the infrared sensing component is further configured to: when it is determined that the door body is in the closed state, sequentially sense multiple storage spaces at predetermined intervals; When ascending, the storage space is repeatedly sensed to confirm the sensing result.

Optionally, the above-mentioned refrigerator further includes: an article scanning device configured to scan the articles in the plurality of storage spaces when the door opening detection device detects that the door is closed, so as to confirm the articles operated before the door is closed; The sensing assembly is also configured to sense the storage space where the item was handled before the door was closed.

According to another aspect of the present invention, a method for detecting the internal temperature of a refrigerator is also provided. The method includes: detecting the opening and closing state of the door body of the refrigerator; when the door body is in the open state, controlling an infrared sensing component used for sensing infrared rays released from items placed in multiple storage spaces of the refrigerator to stop working In order to avoid external interference to the sensing results; when the door is closed, control the infrared sensing component to return to the working state to determine the surface temperature of the item.

Optionally, after the step of controlling the infrared sensing component to return to the working state, it further includes: when it is determined that the door body is in the closed state, sequentially sensing a plurality of storage spaces at predetermined intervals; When the temperature of the items in the storage space rises rapidly, the storage space is repeatedly sensed to confirm the sensing results.

Optionally, the step of sequentially sensing the multiple storage spaces includes: driving the movable part of the infrared sensor carrying the infrared sensor assembly to move vertically between the multiple storage spaces, so that the infrared sensor senses the multiple storage spaces Storage spaces are sensed separately.

Optionally, after the step of detecting the opening and closing state of the door body of the refrigerator, it further includes: after determining that the door body is closed, scanning the items in multiple storage spaces to confirm the items operated before the door is closed; Sensing the storage space where the item being manipulated is located before closing the door.

In the refrigerator and its internal temperature detection method of the present invention, the infrared sensing component is used to sense the infrared rays emitted by the items placed in the storage space, so as to accurately determine the position and temperature of the heat source in the refrigerator, and the infrared sensing component Sensing is only performed when the door is determined to be closed, avoiding the interference caused by external heat sources to the sensing of the infrared sensing component after the door is opened, and preventing the sensing of the infrared sensing component caused by the user’s arm extending into the storage space deviation, so as to ensure the smooth operation of the refrigerator, and avoid the shortened service life and energy waste caused by frequent false starts.

Furthermore, the refrigerator and its internal temperature detection method of the present invention also optimize the layout structure and sensing range of the infrared sensing components, which not only ensures that the infrared sensing area of the infrared sensor can cover the storage space, but also reduces the The influence of external disturbances.

Furthermore, the refrigerator and its internal temperature detection method of the present invention can also scan the items in multiple storage spaces when the door opening detection device detects that the door is closed, so as to confirm the items operated before the door is closed and the infrared sensing component is also configured to sense the storage space where the item operated before the door is closed, so that the refrigerator can cool the newly placed item and avoid affecting other items.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural block diagram of a refrigerator according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

Fig. 3 is a side sectional view of the refrigerator shown in Fig. 2;

Fig. 4 is a schematic structural diagram of a refrigerator according to another embodiment of the present invention;

Fig. 5 is a side sectional view of the refrigerator shown in Fig. 4; and

Fig. 6 is a schematic diagram of a method for detecting the internal temperature of a refrigerator according to an embodiment of the present invention.

Detailed ways

Fig. 1 is a schematic structural block diagram of a refrigerator 100 according to an embodiment of the present invention. The refrigerator 100 may generally include: a box body 110 , a door body 130 , a door opening detection device 140 , a shelf assembly 120 , and an infrared sensor assembly 150 .

Among the above components, a storage compartment is defined inside the box body 110, and the shelf assembly 120 is arranged inside the storage compartment to divide the storage compartment into a plurality of storage spaces. The box body 110 may be surrounded by a top wall, a bottom wall, a rear wall and two left and right side walls. The shelf assembly 120 may include at least one horizontal partition to vertically divide the storage compartment into a plurality of storage spaces. The storage space above each shelf can be used to place different items to make full use of the storage space.

The door body 130 is pivotally disposed at the front of the box body 110 to close and open the storage space. The door body 130 may be connected to the front end of a side wall of the box body 110 through a hinge.

The door opening detection device 140 is configured to detect the opening and closing state of the door body 130 . In the refrigerator 100 of this embodiment, the door opening detection device 140 can use various methods such as a fan switch, a magnetic sensitive switch, and a Hall switch to detect, and when the door body 130 is completely closed or opened, different electrical signals are generated respectively to indicate The state of the door body 130 .

The infrared sensing component 150 is arranged on the inner wall of the box body 110, and is configured to sense the infrared rays released by the items placed in the multiple storage spaces when the door opening detection device 140 detects that the door body 130 is in a closed state, so as to determine The surface temperature of the item.

Compared with the temperature detection method in the prior art, in this embodiment, the infrared sensing component 150 performs temperature scanning only when the door body 130 is completely closed, which avoids the influence of the external heat source on the infrared detection caused by the opening of the door body 130. interference. The infrared sensing component 150 does not emit infrared rays, but passively receives the infrared rays and background infrared rays emitted by the objects in the sensed space, directly senses the temperature change area and temperature of the objects in the refrigerator 100, and converts them into corresponding electrical signals. It has the characteristics of fast sensing and high sensitivity, and overcomes the problem of its susceptibility to interference.

When the infrared sensing component 150 determines that the door body 130 is in the closed state, it can sequentially sense multiple storage spaces at predetermined intervals; The storage space is repeatedly sensed to confirm the sensing result. For example, when there is no switch operation on the door body 130, according to general storage conditions, there should not be large temperature fluctuations in the storage space. If there is a large temperature fluctuation, the storage space can be continuously scanned for confirmation. If it is determined that the storage space does have a high temperature, corresponding cooling measures will be implemented, such as supplying cold air to the storage space, or turning on the Cooling source for the storage space.

The refrigerator 100 of this embodiment may further be provided with an item scanning device 160 . The item scanning device 160 can scan the items in multiple storage spaces when the door opening detection device 140 detects that the door body 130 is closed, so as to confirm the items operated before the door is closed; the item scanning device 160 can use image recognition, Determine the storage space where the operated item is located by means of weight detection. The infrared sensing component 150 can quickly sense the storage space where the items operated before closing the door are located after the door is closed, so as to determine the temperature of the storage space, so as to facilitate corresponding temperature control.

2 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, and FIG. 3 is a side sectional view of the refrigerator 100 shown in FIG. The second partition 132 and the third partition 123, wherein the first storage space is formed above the first partition 121, the second storage space and the second partition are formed between the first partition 121 and the second partition 122. A third storage space is formed between 122 and the third partition 133 . In other embodiments of the present invention, the number of partitions and the number of storage spaces in the shelf assembly 120 can be pre-configured according to the volume and use requirements of the refrigerator 100 .

The infrared sensing assembly 150 is arranged in the middle of the inner side of the rear wall of the box body 110 of the storage space, and its infrared sensing direction is set towards the interior of the storage compartment, and the infrared sensing range is limited to the front side edge of the shelf assembly 120 , the dotted line in FIG. 3 shows the sensing range of the infrared sensing component 150 . Compared with the infrared sensor whose sensing direction is set to point directly to the front, the sensing result can better reflect the temperature of the items placed on the shelf. Moreover, by detecting the opening and closing state of the door body 130 , it is also possible to avoid the influence of external scattered infrared rays on the sensing when the door is opened.

The infrared sensor assembly 150 may include a plurality of infrared sensors arranged at intervals along a vertical line on the rear wall of the box body 110, and one infrared sensor is arranged in each storage space. That is, each infrared sensor is disposed on the rear wall of the box body 110 of a storage space, and is configured to sense infrared rays emitted by items placed in the storage space to determine the surface temperature of the items. In the embodiment shown in FIG. 3 , a first infrared sensor 151 is set in the first storage space, a second infrared sensor 152 is set in the second storage space, and a second infrared sensor 152 is set in the third storage space. Three infrared sensors 153, the number of infrared sensors is set according to the number of storage spaces.

When the door body 130 is in the closed state, a plurality of infrared sensors (such as 151, 152, 153) can scan the temperature once at predetermined intervals. If there is a large temperature fluctuation in the space, the storage space can be continuously scanned for confirmation. In addition, after the door is closed, it is determined that a certain storage space is put in or taken out, and the storage space can be sensed to determine the temperature of the storage space, so as to facilitate corresponding temperature control.

FIG. 4 is a schematic structural view of a refrigerator 100 according to another embodiment of the present invention, and FIG. 5 is a side sectional view of the refrigerator 100 shown in FIG. 4 .

In this embodiment, the shelf assembly 120 is unchanged. The infrared sensing component 150 utilizes one infrared sensor 157 to sense multiple storage spaces, thereby saving hardware costs. For example, the infrared sensor assembly 150 is provided with a vertical transmission part 155, and the vertical transmission part 155 is used to drive the infrared sensor 157 to shuttle between a plurality of partitions, so as to perform circular sensing on the storage space.

The vertical transmission part 155 can be arranged on the rear wall of the box body 110, and it has a movable part capable of vertical translation movement; the infrared sensor 157 is fixed on the movable part 156, and is driven by the movable part 156 to move in a plurality of storage spaces, To sense a plurality of storage spaces respectively.

An optional transmission mode of the vertical transmission part is screw transmission, the screw is vertically arranged and runs through multiple storage spaces, the nut engages with the screw through the thread, and the limiter is used to limit the rotation angle of the nut relative to the refrigerator compartment , to drive the nut to move vertically when the screw rod rotates around its axial direction. The screw can be driven by the transmission motor to rotate around the axis of the screw, and the nut can move up and down during the rotation of the screw because the limit piece limits the angle of the nut. The screw and nut can be driven by a sliding screw or a rolling screw to change the rotary motion into a linear motion and drive the nut to move up and down in the vertical direction. The nut is used as a movable part on which the infrared sensor 157 is fixed. The orientation of the infrared sensor 157 is fixed.

Another optional transmission mode of the vertical transmission component is to use a synchronous belt for transmission. The synchronous belt is in a vertical plane and includes a vertical section that is vertically arranged and runs through a plurality of storage spaces. The synchronous belt transmission is composed of an endless belt with equidistant teeth on the inner surface and matching wheels. It combines the advantages of belt drive, chain drive and gear drive. When turning, the power is transmitted by meshing the teeth with the tooth grooves of the wheel. The slider, as the movable part 156, is fixedly arranged on the above vertical section of the synchronous belt to move vertically under the drive of the synchronous belt transmission assembly; the infrared sensor 157 is fixedly arranged on the slider.

In addition, the refrigerator 100 of this embodiment can also use other transmission methods to drive the infrared sensor 157 to move in the storage room, so as to sense the temperature of items in multiple storage spaces. In addition, the infrared sensor 157 is preset with a sensing position at a predetermined height in each storage space, so that the infrared sensor 157 can sense the temperature of the items in the storage space after the infrared sensor 157 moves to the sensing position. The sensing position can be preset according to the internal space of the refrigerator 100, and the sensing position of each refrigerating chamber is determined through the control of the transmission motor and the locking mechanism. Moreover, the infrared sensor area of the infrared sensor 157 at the sensing position of each storage space is defined as the front side edge of the shelf assembly 120, to avoid being affected by the external heat source of the external refrigerator 100, and the infrared sensor assembly 150 is located at the door. When the body 130 is in the open state, it stops working. If it is determined that a large temperature fluctuation occurs in a certain storage space, the storage space can be continuously scanned for confirmation. When the door body 130 is closed, the transmission component can drive the infrared sensor to the storage space operated by the user, and the storage space is preferentially temperature-sensed.

The embodiment of the present invention also provides a method for detecting the temperature inside the refrigerator, which can be implemented by the refrigerator in any of the above embodiments to detect the temperature of the items inside it. Fig. 6 is a schematic diagram of a method for detecting the internal temperature of a refrigerator according to an embodiment of the present invention, the method for detecting the internal temperature of the refrigerator includes:

Step S602, detecting the opening and closing state of the door of the refrigerator;

Step S604, when the door body is in the open state, control the infrared sensing component used for sensing the infrared rays released by the items placed in the multiple storage spaces of the refrigerator to stop working, so as to avoid external interference to the sensing results;

Step S606, when the door body is in the closed state, control the infrared sensing component to resume the working state, so as to determine the surface temperature of the item.

In step S606, an optional execution process for determining the surface temperature of the item when the infrared sensing component is in the working state is: when it is determined that the door body is in the closed state, sequentially sense multiple storage spaces at predetermined intervals; and When it is detected that the temperature of the items in a certain storage space rises rapidly, the storage space is repeatedly sensed to confirm the sensing result.

In addition, after it is determined that the door is closed, the infrared sensing component can also be driven to scan the items in multiple storage spaces to confirm the items that were operated before the door was closed; space sensing.

In the case that the infrared sensing component is provided with multiple infrared sensors, the multiple infrared sensors can be controlled sequentially for temperature sensing, or one of the infrared sensors can be controlled to work independently. When the transmission assembly is used to drive an infrared sensor for temperature sensing, the movable part of the infrared sensor carrying the infrared sensing assembly can be driven to move vertically between multiple storage spaces, so that the infrared sensor can control the multiple storage spaces Sensing is performed separately.

The refrigerator in this embodiment can be an air-cooled refrigerator, and can controlly distribute the cooling airflow from the cold source to multiple storage spaces according to the surface temperature of the items. Therefore, the position and temperature of the heat source in the refrigerator can be accurately determined, and it is convenient to control according to the situation of the heat source. Air can be supplied to a certain storage space separately, greatly reducing the impact on other items, and providing the best food for the refrigerator. storage environment to reduce food nutrient loss.

In the refrigerator and its internal temperature detection method of this embodiment, the infrared sensing component is used to sense the infrared rays emitted by the items placed in the storage space, so as to accurately determine the position and temperature of the heat source in the refrigerator, and the infrared sensor The component only senses when the door is determined to be closed, which avoids the interference caused by external heat sources on the sensing of the infrared sensor component after the door is opened, and prevents the infrared sensor component from being affected by the user’s arm extending into the storage space. Deviation can be measured, so as to ensure the smooth operation of the refrigerator, and avoid shortened service life and energy waste caused by frequent false starts.

Furthermore, the refrigerator and its internal temperature detection method in this embodiment also optimize the arrangement structure and sensing range of the infrared sensing components, so as to ensure that the infrared sensing area of the infrared sensor can cover the storage space, and it is possible to Reduce the impact of external disturbances.

Furthermore, the detection method of the refrigerator and its internal temperature in this embodiment can also scan the items in multiple storage spaces when the door opening detection device detects that the door is closed, so as to confirm the items operated before the door is closed. article; and the infrared sensing component is also configured to sense the storage space where the article being operated before the door is closed, so that the refrigerator can cool the newly put article and avoid affecting other articles.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (8)

1. A refrigerator, comprising: The box body defines a storage compartment inside; a door body, pivotally arranged at the front part of the box body; A door opening detection device configured to detect the opening and closing state of the door body; a shelf assembly arranged inside the storage compartment to divide the storage compartment into a plurality of storage spaces; and An infrared sensing component is arranged on the inner wall of the box, and is configured to separately detect the infrared rays released by the items placed in the plurality of storage spaces when the door opening detection device detects that the door is in a closed state. sensing to determine the surface temperature of the item; The article scanning device is configured to scan the articles in the plurality of storage spaces when the door opening detection device detects that the door is closed, so as to confirm the articles operated before the doors are closed, and the article scanning device adopts Determine the storage space where the operated item is located by means of image recognition or weight detection; The infrared sensing component is also configured to sense the storage space where the item operated before the door is closed. 2. The refrigerator according to claim 1, wherein: The infrared sensing assembly is arranged in the middle of the inner side of the box rear wall of the storage space, its infrared sensing direction is set towards the interior of the storage compartment, and the infrared sensing range is limited to the shelf The front edge of the shelf assembly. 3. The refrigerator according to claim 2, wherein the infrared sensing assembly comprises: A plurality of infrared sensors are arranged at intervals along a vertical line on the rear wall of the box body, and one infrared sensor is arranged in each storage space. 4. The refrigerator according to claim 2, wherein the infrared sensing assembly comprises: The vertical transmission part is arranged on the rear wall of the box, and has a movable part capable of vertical translation movement; The infrared sensor is fixed on the movable part and driven by the movable part to move in the plurality of storage spaces, so as to sense the plurality of storage spaces respectively. 5. The refrigerator according to any one of claims 1 to 4, wherein the infrared sensing component is further configured to: When it is determined that the door body is in the closed state, sequentially sensing the plurality of storage spaces at predetermined intervals; and When it is detected that the temperature of the items in a certain storage space rises rapidly, the storage space is repeatedly sensed to confirm the sensing result. 6. A detection method for the internal temperature of a refrigerator, the refrigerator being the refrigerator according to any one of claims 1 to 5, and the detection method comprising: detecting the opening and closing state of the door body of the refrigerator; After determining that the door is closed, scan the items in the plurality of storage spaces by means of image recognition or weight detection, so as to confirm the items that were operated before closing the door and determine the storage space where the operated items are located; Sensing the storage space where the item operated before the door is closed; When the door body is in the open state, control the infrared sensing component used for sensing the infrared rays released by the items placed in the multiple storage spaces of the refrigerator to stop working, so as to avoid external interference to the sensing results ; When the door body is in the closed state, the infrared sensing component is controlled to return to the working state, so as to determine the surface temperature of the item. 7. The method according to claim 6, wherein, after the step of controlling the infrared sensing component to return to the working state, it further comprises: When it is determined that the door body is in the closed state, sequentially sensing the plurality of storage spaces at predetermined intervals; and When it is detected that the temperature of the items in a certain storage space rises rapidly, the storage space is repeatedly sensed to confirm the sensing result. 8. The method according to claim 7, wherein the step of sequentially sensing the plurality of storage spaces comprises: The movable part of the infrared sensor carrying the infrared sensing assembly is driven to move vertically between the plurality of storage spaces, so that the infrared sensor senses the plurality of storage spaces respectively.