Refrigeration equipment and control method thereof

Abstract

The invention discloses refrigeration equipment and a control method thereof.The refrigeration equipment comprises a compressor, a friction nanometer generator and a control panel, the friction nanometer generator comprises an electrode layer, a high polymer material layer and an external circuit, the electrode layer and the high polymer material layer are oppositely arranged in the vertical direction, and the external circuit is connected with the electrode layer and the high polymer material layer; when the compressor works, the refrigeration equipment vibrates, and electric signals generated by an external circuit change periodically. On one hand, due to the fact that the structure of the friction nanometer generator is good in flexibility, the friction nanometer generator is more convenient to assemble, on the other hand, the structure of the friction nanometer generator is relatively thin, the occupied space of the friction nanometer generator is relatively small, and through the combination of the two factors, the friction nanometer generator can be further conveniently assembled in a larger range; and therefore, the operation condition in the refrigeration equipment can be mastered more integrally.

Description

Technical Field

[0001] The invention relates to a refrigeration device, and in particular to a control method of the refrigeration device. Background Art

[0002] At present, the perception of changes in food ingredients and operating status in refrigeration equipment can be achieved through technologies such as infrared detection, image recognition, and weighing sensors. Infrared and image recognition both use optical detection methods, which have limited detection ranges and cannot be recognized when blocked. Weighing sensors are relatively expensive, and their layout is limited by the structure of the refrigeration equipment, so they occupy a relatively large space, limiting their application prospects in refrigeration equipment. Therefore, these existing technologies for sensing food ingredients have their own shortcomings and cannot meet the development needs of intelligent refrigeration equipment. Summary of the invention

[0003] In order to solve at least one of the various problems in the prior art regarding the perception of the inside of a refrigeration device, the present invention aims to provide a refrigeration device and a control method thereof that can perform detection economically and efficiently. 。

[0004] To achieve the above-mentioned object of the invention, an embodiment of the present invention provides a refrigeration device, including a compressor, and the refrigeration device also includes:

[0005] A friction nanogenerator, the friction nanogenerator comprising an electrode layer and a polymer material layer arranged opposite to each other up and down, and an external circuit connecting the electrode layer and the polymer material layer, a gas-sensitive material is arranged in the polymer material layer, when the compressor is working, the refrigeration device vibrates, and the electrical signal generated by the external circuit changes periodically;

[0006] A control board, wherein the control board is electrically connected to the external circuit, and the control board is used to monitor the electrical signal of the external circuit.

[0007] As a further improvement of the present invention, the refrigeration device further comprises a refrigeration chamber, and the friction nanogenerator is arranged in the refrigeration chamber.

[0008] As a further improvement of the present invention, the friction nanogenerators are arranged in a plurality of arrays, and different gas-sensitive materials are arranged in the polymer material layers in different friction nanogenerators.

[0009] As a further improvement of the present invention, the gas-sensitive material is configured as a gas-sensitive material for detecting alcohol and / or amine gases.

[0010] As a further improvement of the present invention, the gas-sensitive material includes polyaniline, polypyrrole, or semiconductor metal oxide.

[0011] As a further improvement of the present invention, the refrigeration chamber includes an inner wall, the friction nanogenerator is attached to the inner wall, the friction nanogenerator also includes a waterproof and breathable film, and the electrode layer and the polymer material layer are sealed between the waterproof and breathable film and the inner wall.

[0012] As a further improvement of the present invention, the gas-sensitive material is configured as a gas-sensitive material for detecting refrigerant leakage of the refrigeration equipment.

[0013] To achieve one of the above-mentioned purposes of the invention, an embodiment of the present invention provides a control method for a refrigeration device, the control method comprising the steps of:

[0014] When the compressor is working, continuously acquiring the periodically changing electrical signal generated by the external circuit;

[0015] According to the change of the mean value of the electrical signal obtained in the external circuit, the change of the corresponding gas in the refrigeration equipment is judged.

[0016] As a further improvement of the present invention, the step of:

[0017] The food materials put into the refrigeration equipment are judged according to the change of the corresponding gas in the refrigeration equipment.

[0018] As a further improvement of the present invention, the steps are also included:

[0019] The freshness and / or maturity of the food in the refrigeration equipment is judged according to the change of the corresponding gas in the refrigeration equipment.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the refrigeration equipment and its control method are detected through a friction nanogenerator. On the one hand, due to the good flexibility of the structure of the friction nanogenerator, it is easier to assemble. On the other hand, the structure of the friction nanogenerator is relatively thin, so the space it occupies is relatively small. The combination of these two factors can further facilitate the assembly of a wider range of friction nanogenerators, thereby making it easier to grasp the operating conditions in the refrigeration equipment from a larger overall perspective, which is conducive to the intelligent development of refrigeration equipment and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a refrigeration device according to an embodiment of the present invention;

[0022] Figure 2a It is a schematic structural diagram of a storage device according to one embodiment of the present invention;

[0023] Figure 2b is a schematic structural diagram of a storage device according to another embodiment of the present invention;

[0024] Figure 2c is a structural schematic diagram of a storage device according to another embodiment of the present invention;

[0025] Figure 3 is a structural schematic diagram of a state change of a friction nanogenerator according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of another state change of a friction nanogenerator according to an embodiment of the present invention;

[0027] Figure 5 is a flow chart of a control method according to an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of one state of current changing with time in one embodiment of the present invention;

[0029] Figure 7 is a schematic diagram of another state of current changing with time in one embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of another state of current changing with time in one embodiment of the present invention;

[0031] Among them, 100, refrigeration equipment; 101, refrigeration compartment; 10, storage piece; 20, friction nanogenerator; 21, electrode layer; 22, polymer material layer; 23, external circuit; 24, waterproof and breathable film; 30, drawer; 40, liner. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0033] It should be understood that the terms used herein, such as "upper", "above", "lower", "below", etc., indicating spatial relative positions, are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0034] An embodiment of the present invention provides a refrigeration device capable of economical and efficient detection and a control method thereof.

[0035] The refrigeration device 100 of this embodiment may be a refrigerator, a freezer, a vertical refrigerator, a wine cabinet, etc. The following embodiments may be described by taking a refrigerator as an example. Figure 1As shown, the refrigerator includes a box body, an inner tank 40 disposed in the box body, a refrigeration space with an opening surrounded by the inner tank 40, a door body covering the opening, and a refrigeration system. Some storage parts 10 can be arranged in the refrigeration space. The storage parts 10 of this embodiment can include shelves and drawers 30, both of which are used to place items. The refrigeration system may include a compressor, a condenser, a capillary tube, an evaporator, connecting pipes, etc. The compressor will generate certain vibrations when working, and the vibrations can become relatively subtle through the vibration reduction unit.

[0036] In order to clearly express the position and direction described in this embodiment, in this embodiment, the direction of reference gravity is defined as downward, and the reverse direction is upward. Multiple layers of shelves can be arranged from top to bottom in the refrigerator, and the door body is closed and open in front of the box body, and the reverse direction is rear. In addition, the forward and reverse directions hereinafter refer to different directions of current flow, and are not limited to specific directions. The forward and reverse directions can also be interchanged.

[0037] The refrigeration device 100 further includes a friction nanogenerator 20 and a control board. The friction nanogenerator 20 generates an electrical signal, and the control board receives and detects the electrical signal to detect the situation in the refrigerator or the operating situation.

[0038] Two embodiments are described below. In embodiment 1, the friction nanogenerator 20 is disposed in the refrigeration compartment 101 . In embodiment 2, although the friction nanogenerator 20 is disposed in the refrigerator, it is not necessarily disposed in the refrigeration compartment 101 .

[0039] Example 1

[0040] In Example 1, the refrigeration chamber 101 may include an inner wall, which may be a side wall, an upper wall, a bottom wall, etc. of the inner container 40 , or may be any structure that can form a wall surface, such as a wall surface of the storage element 10 .

[0041] Take the inner wall as the wall surface of the storage element 10 as an example. Figure 2a to 2c As shown, the friction nanogenerator 20 of this embodiment is installed close to the object 10, and the friction nanogenerator 20 includes an electrode layer 21 and a polymer material layer 22 arranged opposite to each other up and down, and an external circuit 23 connected to the electrode layer 21. The distance between the electrode layer 21 and the polymer material layer 22, or between two adjacent layers of the polymer material layer 22, can change relatively. Different polymer material layers 22 have different triboelectric properties, which will generate certain friction charges. The friction charges flow in the circuit to form current. Therefore, the friction nanogenerator 20 can use the coupling of triboelectric effect and electrostatic induction effect to convert tiny mechanical energy into electrical energy. The control board is electrically connected to the external circuit 23, and the control board is used to monitor the electrical signal of the external circuit 23.

[0042] exist Figure 2a and 2b In the embodiment, the electrode layer 21 and the polymer material layer 22 are each provided with one layer. At this time, one end of the external circuit 23 is grounded and the other end is connected to the electrode layer 21. At this time, the external circuit 23 can detect the relative change of the distance between the electrode layer 21 and the polymer material layer 22.

[0043] exist Figure 2c In the embodiment, the electrode layer 21 and the polymer material layer 22 are both provided with two layers, and the two ends of the external circuit 23 are respectively connected to one electrode layer 21. Generally, one polymer material layer 22 can be positively charged after friction, and one polymer material layer 22 can be negatively charged after friction. At this time, the external circuit 23 can detect the relative change of the distance between the two polymer material layers 22.

[0044] The friction nanogenerator 20 has the advantages of being light in texture and low in price. The relative change in position between the electrode layer 21 and the polymer material layer 22 or between two adjacent polymer material layers 22 can convert the mechanical energy into an electrical signal through the friction nanogenerator 20 and be captured and analyzed.

[0045] Furthermore, if Figure 1 As shown, the inner wall may also be a wall of the inner liner 40, such as a side wall, and the specific principle of the arrangement on the side wall is the same as that of the storage element 10 described above.

[0046] For example Figure 1 As shown, the storage device 10 includes a shelf, and the friction nanogenerator 20 is installed close to the upper surface of the shelf. This facilitates the routing of the friction nanogenerator 20 on the shelf and facilitates accurate detection of changes in objects on the shelf.

[0047] Or in other embodiments, continue as Figure 1 As shown, the storage device 10 includes a drawer 30, and the friction nanogenerator 20 is installed close to the lower surface of the drawer 30. When the drawer 30 is located in the refrigeration compartment 101, the drawer 30 abuts against the friction nanogenerator 20. This can facilitate the routing of the friction nanogenerator 20 on the drawer 30 and facilitate accurate detection of changes in the objects in the drawer 30.

[0048] like Figure 3 As shown, when the relative distance between the electrode layer 21 and the polymer material layer 22 or between two adjacent polymer material layers 22 decreases, a forward current is generated in the external circuit 23 .

[0049] like Figure 4 As shown, when the relative distance between the electrode layer 21 and the polymer material layer 22 or between two adjacent polymer material layers 22 increases, a reverse current is generated in the external circuit 23 .

[0050] A gas-sensitive material is provided in the polymer material layer 22. When the gas environment near the friction nanogenerator 20 changes, the triboelectric properties of the polymer material layer 22 change, and the electrical signal changes accordingly. Different gas-sensitive materials can sense changes in different gas concentrations. Some gases may cause the current to flow in the forward direction, while some gases may cause the current to flow in the reverse direction.

[0051] When the compressor is working, the refrigeration device 100 generates vibrations, and the electrical signal generated by the external circuit 23 changes periodically. On this basis, the changes in the gas environment are superimposed, which will change the periodically changing electrical signal.

[0052] The electrode layer 21 and the polymer material layer 22 of this embodiment can be set to one or more layers. The forward current and reverse current generated in the circuit can correspond to the increase and decrease of the relative distance between the electrode layer 21 and the polymer material layer 22, respectively. The following is an example of setting one layer of the electrode layer 21 and the polymer material layer 22. Others, such as setting two or more layers of the electrode layer 21 and the polymer material layer 22, can be adjusted accordingly according to the principles below. In addition, if the corresponding relationship is opposite, it can also be implemented according to the same principle.

[0053] Ginseng Figure 3 The upper part to Figure 3 In the lower half of the change process, according to the law of electrostatic induction and charge conservation, the reduction of the interlayer distance between the polymer material layer 22 and the electrode layer 21 will lead to an increase in the amount of positive charge (positive or negative charge may vary depending on the material of the polymer material layer 22) in the induction band of the electrode layer 21, and electrons flow from the upper electrode layer 21 to the lower polymer material layer 22 through the external circuit 23, thereby generating an instantaneous current in the external circuit 23. This charge transfer amount increases with the increase of the deformation distance until the deformation reaches the maximum.

[0054] Re-attend Figure 4 The upper part to Figure 4 In the lower half of the change process, the polymer material layer 22 moves upward, the charge balance is broken again, and the electrons flow in the opposite direction to generate an opposite instantaneous current. At this time, the change process of the current with time is similar to Figure 3 on the contrary.

[0055] Therefore, during the cycle of pressing and releasing the friction nanogenerator 20, due to the change in the distance between the polymer material layer 22 and the electrode layer 21 (if the Figure 2c In the embodiment, the distance between the polymer material layer 22 and the polymer material layer 22 changes, which will cause the charge to be redistributed through the external circuit 23, generating a pair of opposite instantaneous currents, thereby converting mechanical energy into electrical energy.

[0056] When the compressor is working, the reciprocating vibration will continue to cycle. Figure 3 and Figure 4 of changes, so it will produce Figure 6 , 7 , The current in the first half of 8 changes periodically with time.

[0057] After the polymer material layer 22 is doped with the gas-sensitive material, the change in the distance between the polymer material layer 22 and the electrode layer 21, or the change in the distance between adjacent polymer material layers 22, will cause the corresponding electrical properties to change, so the electrical signal will change accordingly. Through the change in the current in this process, it can be determined that the change in the current of the friction nanogenerator 20 caused by the vibration of the compressor is affected. Correspondingly, different judgments can be made in the following embodiments based on which gas-sensitive material is affected, that is, which gas is affected, such as whether new food is placed or the freshness or maturity of the food has changed.

[0058] Furthermore, the friction nanogenerators 20 are arranged in multiple arrays, and different gas-sensitive materials are arranged in the polymer material layers 22 in different friction nanogenerators 20, so that the friction nanogenerators 20 at different positions can sense the changes of objects at different positions, and different gas-sensitive materials can respond to different gases, which is convenient for judging the changes of food materials corresponding to various gases, and also convenient for mutual correction and precise control.

[0059] Further, the gas-sensitive material is configured as a gas-sensitive material for detecting alcohol and / or amine gases, and the gas-sensitive material includes polyaniline, polypyrrole, or semiconductor metal oxide.

[0060] Different gas-sensitive materials will cause different changes in the triboelectric properties of the polymer material layer 22, and the electrical signals will change accordingly. For example, for aquatic products, the gas-sensitive material doped in the polymer material layer 22 is polyaniline, tungsten trioxide or polypyrrole, which has an extremely sensitive response to amine gases. As the amine gases are emitted, the concentration gradually increases, and the current of the corresponding friction nanogenerator 20 will gradually increase. For another example, alcohols are characteristic gas molecules produced during the corruption of fruits. The detection of the concentration and proportion of alcohol gas substances can realize the detection of the degree of fruit corruption. As the freshness of the food decreases, the concentration of the characteristic corruption gas emitted gradually increases, and the current of the corresponding friction nanogenerator 20 will gradually increase. According to the corresponding increase ratio of the current of the friction nanogenerator 20 corresponding to different gas-sensitive materials, it can be determined whether it is a change in the type of food or a change in the freshness or maturity of the food.

[0061] In addition, if the electrode layer 21 and the polymer material layer 22 are both set as multiple layers, each polymer material layer 22 is connected to one electrode layer 21, and a set of external circuits 23 is connected between two adjacent electrode layers 21, and two adjacent external circuits 23 are set in series. This can avoid the problem that when only one layer is set, if the current generated is too small and the speed is too fast to be accurately detected, a larger current can be generated and accurately detected by setting multiple layers in series.

[0062] Furthermore, if Figure 2a to 2c As shown, the friction nanogenerator 20 further includes a waterproof and breathable film 24, and an electrode layer 21 and a polymer material layer 22 are sealed between the waterproof and breathable film 24 and the inner wall. The waterproof and breathable film 24 can isolate the influence of water vapor.

[0063] Correspondingly, the present invention provides an embodiment of a control method for a refrigeration device 100 , which may be a state where the compressor is working and the vibration energy transmitted to the friction nanogenerator 20 can be detected by the friction nanogenerator 20 .

[0064] like Figure 5 As shown, the control method comprises the steps of:

[0065] Step S10: The compressor works;

[0066] Step S20: continuously acquiring the periodically changing electrical signal generated in the external circuit 23 .

[0067] When the refrigerator compressor is working, slight vibration will naturally be generated inside, and the vibration will be sensed by the friction nanogenerator 20 to generate an electrical signal, such as Figure 6 , 7 , the beginning stage of 8.

[0068] Step S30: judging the change of the corresponding gas in the refrigeration device 100 according to the change of the mean value of the electrical signal;

[0069] Step S41: if the gas change corresponds to the characteristic gas of the food type, then execute step S42;

[0070] Step S42: determining the food to be put into the refrigeration device 100.

[0071] When food is placed in the refrigerator, some characteristic gases corresponding to the food will be released. Some of these gases can cause the electrical characteristics of the friction nanogenerator 20 to change slightly. The change state of the electrical signal is as follows: Figure 6 As shown; some can make the electrical characteristics of the friction nanogenerator 20 change greatly, and the change state of the electrical signal is as follows Figure 7As shown in the figure, through these changes, we can determine which gas components have changed. For example, fruits, vegetables and meat ingredients have their own characteristic odors, such as terpenes in mangoes, alcohols and aldehydes in grapes, and amines in aquatic products. Based on these changes, we can determine what kind of ingredients they are.

[0072] In addition, although the gases of some food ingredients may overlap, cross-verification can be achieved by detecting different gases through multiple arrays of friction nanogenerators 20.

[0073] Step S51: if the gas change corresponds to the characteristic gas of the change in the maturity of the food, then execute step S52;

[0074] Step S52: Determine the freshness and / or maturity of the food in the refrigeration device 100.

[0075] Taking ethylene-sensitive gas-sensitive materials for doping as an example, tin dioxide SnO2, zinc oxide ZnO, cobalt oxide Co3O4, etc. may be used. Changes in ethylene concentration correspond to changes in the triboelectric properties of the polymer material layer 22, corresponding to changes in the freshness and / or maturity of the food.

[0076] When food is stored for a long time, some gases are generated by the food, such as alcohol and ester gases generated by aquatic products, and amine gases generated by meat. When the gas environment changes, the gas-sensitive material causes the triboelectric properties of the polymer material layer 22 to change, and the electrical signal changes accordingly. Different concentrations of gas substances correspond to different states of change of the electrical signal. In other words, different states of change of the electrical signal reflect the state of gas release under different states of maturity and freshness of the food. Later changes such as Figure 8 The state in the second half of the refrigeration device 100 reflects an increase in gas concentration, that is, an increase in the amount of gas released by the food, as the generated current gradually increases. Therefore, the freshness and / or maturity of the food in the refrigeration device 100 can be judged based on the changes in the gas.

[0077] Example 2

[0078] In this embodiment, the gas-sensitive material is configured as a gas-sensitive material for detecting refrigerant leakage of the refrigeration device 100 .

[0079] When the refrigerator compressor is working, a slight vibration will naturally be generated inside, which will be sensed by the friction nanogenerator 20 and generate an electrical signal. On this basis, the gas-sensitive material that is sensitive to the gas volatilized by the refrigerant can change the triboelectric properties of the polymer material layer 22, and the electrical signal will change accordingly. By monitoring the changes in the electrical signal, it can be determined whether the refrigerant is leaking.

[0080] In Example 2, the friction nanogenerator 20 can be set in any area in the refrigerator where the refrigerant leaks, not only in the refrigeration compartment 101, but also in the compressor compartment, and can be set at the outlet of the refrigerator. These locations generate vibrations when the compressor compartment is working. Figure 8 The periodic current in the first half of the period changes. When the refrigerant evaporates, the increase in gas concentration causes Figure 8 The gradually increasing current in the second half of the test can indicate refrigerant leakage.

[0081] Compared with the commonly used technology, this embodiment has the following beneficial effects:

[0082] The refrigeration device 100 and the control method thereof are detected by means of the friction nanogenerator 20. On the one hand, due to the good flexibility of the structure of the friction nanogenerator 20, it is easier to assemble. On the other hand, the structure of the friction nanogenerator 20 is relatively thin, so the space it occupies is relatively small. The combination of these two factors can further facilitate the assembly of the friction nanogenerator 20 in a wider range, thereby making it easier to grasp the operating conditions in the refrigeration device 100 from a larger overall perspective, which is beneficial to the intelligent development of the refrigeration device 100 and improves the user experience.

[0083] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A refrigeration device, comprising a compressor, characterized in that: The refrigeration equipment also includes: A friction nanogenerator, the friction nanogenerator comprising an electrode layer and a polymer material layer arranged opposite to each other up and down, and an external circuit connecting the electrode layer and the polymer material layer, a gas-sensitive material is arranged in the polymer material layer, when the compressor is working, the refrigeration device vibrates, and the electrical signal generated by the external circuit changes periodically; A control board, wherein the control board is electrically connected to the external circuit, and the control board is used to monitor the electrical signal of the external circuit.

2. The refrigeration equipment according to claim 1, characterized in that: The refrigeration device further comprises a refrigeration chamber, and the friction nanogenerator is arranged in the refrigeration chamber.

3. The refrigeration equipment according to claim 2, characterized in that: The friction nanogenerators are arranged in a plurality of arrays, and different gas-sensitive materials are arranged in the polymer material layers in different friction nanogenerators.

4. The refrigeration equipment according to claim 2 or 3, characterized in that: The gas-sensitive material is configured to be a gas-sensitive material for detecting alcohol and / or amine gases.

5. The refrigeration equipment according to claim 2 or 3, characterized in that: The gas-sensitive material includes polyaniline, polypyrrole, or semiconductor metal oxide.

6. The refrigeration equipment according to claim 2, characterized in that: The refrigeration chamber comprises an inner wall, the friction nanogenerator is attached to the inner wall, the friction nanogenerator further comprises a waterproof and breathable film, and the electrode layer and the polymer material layer are sealed between the waterproof and breathable film and the inner wall.

7. The refrigeration device according to claim 1, characterized in that: The gas-sensitive material is configured as a gas-sensitive material for detecting refrigerant leakage of the refrigeration equipment.

8. A method for controlling a refrigeration device, characterized in that: The refrigeration device as claimed in any one of claims 1 to 6, wherein the control method comprises the steps of: When the compressor is working, continuously acquiring the periodically changing electrical signal generated by the external circuit; According to the change of the mean value of the electrical signal obtained in the external circuit, the change of the corresponding gas in the refrigeration equipment is judged.

9. The control method for refrigeration equipment according to claim 8, characterized in that: Also includes the steps: The food materials put into the refrigeration equipment are judged according to the change of the corresponding gas in the refrigeration equipment.

10. The control method of refrigeration equipment according to claim 8, characterized in that: Also includes the steps: The freshness and / or maturity of the food in the refrigeration equipment is judged according to the change of the corresponding gas in the refrigeration equipment.

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