Defrosting detection assembly, refrigeration device and defrosting method

Abstract

The embodiment of the present application provides a defrosting detection assembly, a refrigeration equipment and a defrosting method, wherein the defrosting detection assembly is used for the refrigeration equipment and comprises: a film pressure sensor comprising a detection part and a connecting part connected with each other, the detection part is attached to the outer wall of the heat exchange pipe of the heat exchanger, and the film pressure sensor is used for determining the frost pressure on the side of the detection part away from the heat exchange pipe; and a controller which is electrically connected with the connecting part, and is used for controlling the refrigeration equipment to enter a defrosting mode when the frost pressure is not less than a first pressure value, and / or controlling the refrigeration equipment to exit the defrosting mode when the frost pressure is not greater than a second pressure value. In the technical scheme of the present application, the frost pressure resistance value change of the sensor is utilized, so that the pressure signal is converted into an electric signal and transmitted to the controller for judgment, and the defrosting on demand is realized.

Description

Technical Field

[0001] This invention relates to the field of defrosting technology, and more specifically, to a defrosting detection component, a refrigeration device, and a defrosting method. Background Technology

[0002] Currently, during the operation of refrigeration equipment such as refrigerators, frost gradually forms on the surface of the evaporator. Related technologies use sensors to detect the frost thickness as the basis for automatic defrosting. However, the sensors currently used are relatively large, and in the limited space of the evaporator, they can easily alter the airflow distribution, leading to a decrease in cooling performance. Summary of the Invention

[0003] The present invention aims to at least solve the technical problem of large sensor size affecting cooling performance in the prior art.

[0004] In view of this, an embodiment of the first aspect of the present invention provides a defrosting detection component.

[0005] A second aspect of the present invention provides a refrigeration device.

[0006] An embodiment of the third aspect of the present invention provides a defrosting method.

[0007] To achieve the above objectives, an embodiment of the first aspect of the present invention provides a defrosting detection component for a refrigeration device. The refrigeration device includes a heat exchanger, and the defrosting detection component includes: a thin-film pressure sensor, including a detection part and a connecting part connected together, the detection part being in contact with the outer wall of the heat exchange tube of the heat exchanger, the thin-film pressure sensor being used to determine the frosting pressure on the side of the detection part away from the heat exchange tube; and a controller, electrically connected to the connecting part, the controller being used to control the refrigeration device to enter the defrosting mode when the frosting pressure is not less than a first pressure value, and / or to control the refrigeration device to exit the defrosting mode when the frosting pressure is not greater than a second pressure value.

[0008] The defrosting detection component proposed in this invention is mainly used to control the entry and exit of the defrosting mode of refrigeration equipment, thereby accurately monitoring the frost pressure. It can automatically start the defrosting process when the frost layer reaches a certain thickness and promptly exit the defrosting mode after the frost layer is removed. The defrosting detection component includes a thin-film pressure sensor and a controller. This solution utilizes the structural characteristics of the thin-film pressure sensor to reduce the space occupied in the heat exchanger chamber, ensuring the cooling airflow. Furthermore, the detection part of the thin-film pressure sensor is attached to the outer wall of the heat exchanger tube. Under the action of the detection part, the weight pressure of the frost layer can be sensed. Because of its close proximity to the heat exchanger tube, the frost accumulation can be detected in real time and accurately, thus determining the frost pressure outside the detection part.

[0009] Generally, the detection section is closely attached to the outer wall of the heat exchange tube. When frosting occurs, the frost layer will gradually accumulate on the outside of the detection section, and the frosting pressure will change accordingly. Thus, the defrosting mode can be precisely controlled according to the different frosting pressures.

[0010] Specifically, a thin-film pressure sensor is mainly used to convert pressure signals into electrical signals. It includes a detection unit and a connecting unit. The detection unit senses the pressure acting on its surface when frost forms, correlates the pressure signal with an electrical signal, and thus converts the pressure signal into a transmittable electrical signal. It can be understood that different frost pressures acting on the detection unit will produce different corresponding electrical signals. The connecting unit is connected to the detection unit and transmits the converted electrical signal through it. The connecting unit can be considered as a link between the detection unit and the controller, primarily used for electrical signal transmission. In short, the combined action of the detection unit and the connecting unit realizes the conversion and transmission of pressure signals into electrical signals, making it a crucial component of the pressure sensor.

[0011] It should be added that the detection unit needs to be in close contact with the outer wall of the heat exchanger tubes to increase the contact area between them. This facilitates the fixation of the detection unit on the outer wall of the heat exchanger tubes, improves the stability of the pressure sensor during installation, and prevents the sensor from falling off the heat exchanger tubes, thus reducing the accuracy of the detection signal and preventing equipment damage caused by drops or impacts. Functionally, it can better collect the frost signal on the outer wall of the heat exchanger tubes, determine the frost pressure on the side of the detection unit away from the heat exchanger tubes, and serve as the basis for entering and exiting defrosting. This provides a reliable signal for subsequent control decisions by the controller, indirectly improving the accuracy and reliability of defrosting detection.

[0012] The controller is mainly used to control electrical signals. By judging the electrical signals, it issues different action commands. The controller is electrically connected to the connection unit to receive the electrical signals converted by the detection unit and compare them with the pressure threshold (or a set range) preset inside the controller. This determines whether the refrigeration equipment should enter or end the defrosting process. For example, when the frosting pressure received by the controller is greater than or equal to the first pressure value, it indicates that the frost thickness inside the cabinet is too large, affecting heat exchange performance and increasing air resistance. The refrigeration equipment then enters the defrosting mode. Similarly, when the frosting pressure is less than or equal to the second pressure value, it indicates that the temperature inside the cabinet is too high, which is not conducive to food storage and causes energy waste. The refrigeration equipment then exits the defrosting mode and completes the defrosting operation.

[0013] It should be noted that there are no restrictions on the way the detection section is attached to the outer wall of the heat exchange tube. It can be attached by adhesive, by adsorption, or by other fixing methods, as long as the installation is reasonable.

[0014] Furthermore, the present invention does not limit the shape, size, or thickness of the detection part and the connecting part in the pressure sensor. For example, a rectangle, a circle, or other shapes are all acceptable, as long as the design is reasonable and meets its own set conditions.

[0015] Through the above design, this solution effectively solves the problems of inaccurate defrosting cycles and imperfect defrosting effects in refrigeration equipment, achieving on-demand defrosting. Specifically, by using a thin-film pressure sensor instead of a piezoelectric device, the problem of altered airflow distribution within the evaporator chamber due to excessive sensor size is reduced, maintaining the original refrigeration performance of the equipment. Simultaneously, the influence of the environment on defrosting signal acquisition is eliminated, improving defrosting reliability and achieving lower costs and greater stability. Through the invention and design of sensors, coupled with controller commands, an automated, multi-level defrosting control system is provided for the defrosting detection component. This system measures frost thickness in real time, significantly improving the intelligent defrosting capability of refrigeration equipment. When the frost pressure is greater than or equal to the first pressure value, defrosting mode is entered; when the frost pressure is less than or equal to the second pressure value, defrosting mode is exited, repeating the cycle continuously. This truly achieves automated intelligent control, freeing up human intervention and avoiding energy loss and reduced efficiency caused by scheduled defrosting. This greatly improves the accuracy and reliability of the defrosting cycle, thereby ensuring the working efficiency of the refrigeration equipment and enabling it to operate stably and safely in humid and extreme high and low temperature environments. This is a crucial design consideration for refrigeration equipment requiring heated defrosting, effectively extending equipment lifespan, reducing energy consumption, and improving user safety.

[0016] In some technical solutions, optionally, the heat exchanger includes multiple heat exchange fins arranged in parallel, heat exchange tubes pass through the heat exchange fins, the heat exchange tubes include multiple heat exchange sections arranged along the direction of gravity, and a thin-film pressure sensor is disposed on the outer wall of the lowest of the multiple heat exchange sections; wherein, the thin-film pressure sensor is disposed on the side of the heat exchange section away from the ground.

[0017] In this technical solution, the heat exchanger includes multiple parallel heat exchange fins through which heat exchange tubes pass. This design can increase the heat transfer area. By increasing the number and area of ​​fins, the surface area of ​​the heat exchanger is significantly expanded, the thermal resistance is reduced, and the gas flow is enhanced, thereby improving the heat exchange efficiency.

[0018] In addition, the heat exchanger includes multiple heat exchange sections arranged along the direction of gravity. The design of multiple heat exchange sections allows for heat exchange over a larger area, improving heat transfer efficiency. Among them, the thin-film pressure sensor is installed on the outer wall of the lowest heat exchange section. By limiting the installation position of the sensor, frost is most likely to accumulate at the bottom under the influence of gravity. By placing the thin-film pressure sensor at the bottom, the detection accuracy is improved.

[0019] It is important to note that the membrane pressure sensor is located on the side of the heat exchange section away from the ground, so that the pressure changes caused by the accumulation of frost during natural operation can directly affect the membrane pressure sensor, further improving the accuracy of detection.

[0020] In some technical solutions, optionally, the heat exchange tube includes a first tube segment and a second tube segment connected in the direction of gravity, with the first tube segment located above the second tube segment, and at least part of the detection part attached to the outer wall of the first tube segment.

[0021] In this technical solution, the heat exchange tube includes a first tube section and a second tube section, which are connected in the direction of gravity. The first tube section is located above the second tube section. By defining the relative positions of the first tube section and the second tube section, the installation position of the sensor is further clarified. The detection part of the sensor must be fully or at least partially attached to the outer wall of the first tube section, so that the detected frost pressure can more accurately reflect the actual weight of the frost layer, thereby improving the accuracy and reliability of signal acquisition.

[0022] It should be added that there are no restrictions on the shape design of the heat exchange tubes here. For example, round tubes, square tubes, or other shapes are all acceptable.

[0023] In some technical solutions, optionally, the heat exchange tube is in the shape of a circular tube, and the first tube section and the second tube section are separated by the axial section of the heat exchange tube through the axis of the heat exchange tube.

[0024] In this technical solution, the heat exchange tube is limited to a circular tube shape. This design satisfies the heat exchange effect while also being aesthetically pleasing. It not only enhances the heat exchange capacity of the heat exchange tube but also improves the anti-fouling performance. Furthermore, the first tube section and the second tube section are separated along the axial cross section. This limitation allows for a better understanding of the external structure of the heat exchange tube and clarifies the relative positional relationship between the first and second tube sections, thereby determining the contact position of the detection unit.

[0025] It is understandable that the detection unit is attached to the first pipe section and located above the gravity direction of the second pipe section. When the frosting pressure acts on the detection unit, the pressure signal is converted into an electrical signal to the maximum extent and then transmitted to the controller, ensuring the reliability and accuracy of the defrosting detection system.

[0026] In some technical solutions, optionally, the tangent of the outer wall of at least a portion of the heat exchange tube that is in contact with the detection unit is perpendicular to the direction of gravity.

[0027] In this technical solution, the detection unit is attached to the outer wall of the heat exchange tube, and the tangent of the outer wall of the heat exchange tube at at least part of the attachment point is perpendicular to the direction of gravity. This condition is actually to further ensure the accuracy of the pressure signal collected by the detection unit. It can be understood that the more perpendicular the tangent of the outer wall of the detection unit to the direction of gravity is, the less the pressure exerted by frost on the detection unit is offset by other forces (such as gravity), and the more accurate the pressure signal collected will be, thus improving the reliability of signal acquisition.

[0028] It's understandable that placing the detection unit on the heat exchange tubes, through its thin-film design, allows for real-time measurement of the frost thickness. This not only satisfies signal acquisition and transmission requirements but also effectively reduces the volume of the occupied chamber, without altering the airflow distribution within the chamber and thus affecting the original cooling performance. This enables the refrigeration equipment to determine whether to enter defrost mode based on the actual frost condition of the heat exchange tubes, achieving on-demand defrosting and more precise defrost control.

[0029] In some technical solutions, the heat exchange tube may optionally include a plurality of heat exchange sections spaced apart along a first direction perpendicular to the direction of gravity, and a thin-film pressure sensor is disposed on the outer wall of at least one of the plurality of heat exchange sections except for the heat exchange sections located at both ends of the first direction.

[0030] In this technical solution, the direction perpendicular to the direction of gravity is defined as the first direction. The heat exchange tube is provided with multiple heat exchange sections at intervals in the first direction. By limiting the structure of the heat exchange tube, the composition and arrangement of the heat exchange tube can be more intuitively understood. The design of multiple heat exchange sections in the first direction can improve the heat exchange efficiency of the heat exchanger, increase the heat exchange capacity, and improve the cooling effect.

[0031] In addition, the thin-film pressure sensor is set on the outer wall of the heat exchange tube. Specifically, it is set on the outer wall of one or more heat exchange sections in the first direction, excluding the two ends. It can be understood that this part is the middle part of the heat exchange tube and not located at the end. By further defining the installation position of the sensor, the relative positional relationship between the sensor and the heat exchange tube can be more clearly defined. Its middle arrangement can improve the accuracy by detecting the frost pressure in this part when frost forms.

[0032] In addition, the design of the thin-film pressure sensor being located in the middle can protect it to a certain extent. When an external object impacts the heat exchange tube along the first direction, it will first act on the heat exchange sections at both ends, thereby ensuring that the thin-film pressure sensor is not affected and that the sensor can work stably.

[0033] Furthermore, this application does not limit the installation location and number of heat exchange sections of the sensor in the first direction. The thin-film pressure sensor can be installed on any heat exchange section other than the two ends in the first direction, or one or more can be installed on this basis.

[0034] In some technical solutions, optionally, the detection unit specifically includes: a microstructure layer, a conductive layer, an electrode layer, and a substrate layer stacked together. The microstructure layer is used to deform under pressure, thereby causing the conductive layer to deform. The contact area between the conductive layer and the electrode layer changes, thereby changing the resistance of the conductive layer. The conductive layer is connected to the connecting part. A first encapsulation layer and a second encapsulation layer are also included. The first encapsulation layer is located on the side of the microstructure layer away from the substrate layer, and the second encapsulation layer is located on the side of the substrate layer away from the microstructure layer.

[0035] In this technical solution, the detection unit includes a microstructure layer, a conductive layer, an electrode layer, and a substrate layer, arranged in a stacked configuration. Specifically, the microstructure layer is designed to deform under pressure. This can be understood as follows: based on its structural characteristics, when the refrigeration equipment generates pressure during frost formation on the surface of the detection unit, the microstructure layer, being closer to the pressure surface, preferentially absorbs the pressure, causing it to deform. Because the microstructure layer and the conductive layer are in overlapping contact, the conductive layer deforms along with it, thus changing the contact area between the conductive layer and the electrode layer. This alters the resistance of the conductive layer, which is then connected to the connector via the conductive layer to transmit electrical signals to the controller, thereby converting the pressure signal into an electrical signal.

[0036] In simple terms, thin-film pressure sensors operate on the piezoresistive response principle. Materials with surface microstructures deform under pressure, altering the contact area and contact resistance between the conductive and electrode layers. This, in turn, correlates pressure with electrical signals, converting the pressure acting on the surface during frost formation into an electrical signal for transmission, thus enabling pressure measurement. The frost layer accumulates on the sensor, forming pressure. By measuring the frost weight pressure, the thickness of the frost layer on the heat exchanger is reflected, allowing for real-time measurement of the amount of frost on the heat exchanger.

[0037] It should be added that the detection unit also includes a first encapsulation layer and a second encapsulation layer. The function of the encapsulation layer is to support and protect the other components between them. Specifically, the first encapsulation layer is located on the side of the microstructure layer away from the substrate layer. It is used to support the frost layer and mainly plays a role in protecting the microstructure layer and other structures. When the refrigeration equipment begins to frost, the frost layer will accumulate on the surface of the first encapsulation layer, and the frost pressure will directly act on the first encapsulation layer, playing a role in isolation and protection, which can improve the service life of the sensor.

[0038] Similarly, the second encapsulation layer is located on the side of the base layer away from the microstructure layer, and mainly plays a supporting and protective role. By setting the second encapsulation layer in the detection part, it not only protects the microstructure layer and other structures, but also has the effect of bearing and supporting, so that the detection part has a certain degree of stability.

[0039] It should be added that the encapsulation layer is bonded to the microstructure layer, the encapsulation layer to the substrate layer, and the conductive layer to the electrode layer via adhesive layers. This connection method helps to fix the two in the proper position and ensures that they will not fall off during transportation or use.

[0040] In summary, the structural design of the detection unit gives the thin-film pressure sensor advantages such as small size and thinness, effectively reducing the space occupied by the sensor, lowering product costs, and improving defrosting reliability. In addition, its close contact with the heat exchanger wall will not affect the original cooling performance of the heat exchanger. Furthermore, since it directly measures the weight of the frost layer on the sensing area to reflect the frost layer thickness, it does not need to be used with other devices to eliminate the influence of environmental conditions, resulting in higher stability.

[0041] In some technical solutions, the detection unit is attached to the outer wall of the heat exchange tube.

[0042] In this technical solution, by limiting the way the detection part is attached to the outer wall of the heat exchange tube, the detection part can be firmly fixed to the outer wall of the heat exchange tube, which improves the contact stability between the two. At the same time, this fixing method does not require drilling holes or using screws on the object, resulting in a neat appearance and avoiding damage to the original structure.

[0043] An embodiment of the second aspect of this application provides a refrigeration device, including: a heat exchanger and a defrost detection component; a defrost device disposed opposite to the heat exchanger, the defrost device being used to operate when the refrigeration device enters a defrost mode and to stop operating when the refrigeration device exits the defrost mode.

[0044] The refrigeration equipment provided in this application includes: a heat exchanger, a defrost detection component, and a defrost device. The heat exchanger functions to transfer heat energy and facilitate heat exchange between hot and cold media within the refrigeration equipment. The defrost detection component is used to detect the thickness of the frost layer within the refrigeration equipment, thereby converting the pressure signal generated by the frost thickness into an electrical signal and transmitting it to the controller.

[0045] A defrosting device is used to defrost refrigeration equipment, maintaining the refrigerator's cooling efficiency by melting the frost layer. Specifically, it is positioned opposite the heat exchanger. When the refrigeration equipment enters defrosting mode, the defrosting device starts working to defrost; when the refrigeration equipment exits defrosting mode, the defrosting device stops operating.

[0046] The defrosting device can be understood as the executor of the entire defrosting system. It does not have the ability to judge instructions, but only the ability to receive signals. When the controller gives an instruction to require the refrigeration equipment to enter the defrosting state, the defrosting device starts to work. Conversely, when the refrigeration equipment exits the defrosting state, the defrosting device stops working. The defrosting device must have the ability to quickly switch operating modes.

[0047] In some technical solutions, the defrosting device includes a heater, and the controller of the defrosting detection component is used to control the heater to heat the heat exchanger when the refrigeration equipment enters the defrosting mode.

[0048] In this technical solution, the defrosting device includes a heater. The refrigeration equipment uses the heater to defrost the frost layer. Specifically, in the defrosting mode, the controller of the defrosting detection component acts on the refrigeration equipment, issues a defrosting command, and controls the heater to heat the heat exchanger. Under the action of the fins on the surface of the heat exchange tube and multiple heat exchange sections, the frost layer on the surface of the heat exchanger melts, thereby achieving the purpose of defrosting and maintaining the refrigeration efficiency of the refrigeration equipment.

[0049] An embodiment of the third aspect of this application provides a defrosting method for a refrigeration device, comprising: determining a frosting pressure using a thin-film pressure sensor of the refrigeration device; obtaining a preset defrosting pressure range corresponding to the refrigeration device; and controlling the refrigeration device to enter or exit a defrosting mode based on the frosting pressure and the preset defrosting pressure range.

[0050] In this technical solution, a thin-film pressure sensor on the refrigeration equipment is used to measure the frost pressure on the surface of the evaporator or heat exchanger in real time. The degree of frost is determined by directly measuring the weight of the frost layer, providing accurate data to determine whether defrosting is necessary.

[0051] The defrost pressure range, including defrost start pressure and defrost exit pressure, is obtained from the refrigeration equipment's control system to match the equipment's operating characteristics. The real-time measured frosting pressure is compared with the preset defrost pressure range. If the frosting pressure reaches or exceeds the defrost start pressure, the control system triggers the defrost mode. If the frosting pressure drops to or falls below the defrost exit pressure, the control system terminates the defrost mode, achieving on-demand defrosting and avoiding unnecessary energy consumption and impact on equipment performance.

[0052] By utilizing the precise measurement capabilities of thin-film pressure sensors and the rational setting of preset defrost pressure ranges, the defrosting process of refrigeration equipment is made intelligent and efficient. In essence, the refrigeration equipment collects signals of frost pressure through sensors and transmits them to relevant control devices. The collected pressure signals are compared with a pre-set pressure range to determine whether the refrigeration equipment should enter defrost mode.

[0053] In some technical solutions, optionally, the endpoints of the preset defrost pressure range include a first pressure value and a second pressure value, where the first pressure value is greater than the second pressure value. Based on the frosting pressure and the preset defrost pressure range, the refrigeration equipment is controlled to enter or exit the defrost mode. Specifically, this includes: controlling the refrigeration equipment to enter the defrost mode when the frosting pressure is not less than the first pressure value; and controlling the refrigeration equipment to exit the defrost mode when the refrigeration equipment is in the defrost mode and the frosting pressure is not greater than the second pressure value.

[0054] In this technical solution, the preset defrosting pressure range endpoints include a first pressure value and a second pressure value, with the first pressure value being greater than the second pressure value. By defining the relationship between the two, the different limiting effects produced by different pressure values ​​are clarified, providing a comparative reference for the collected frosting pressure. Based on the frosting pressure and the preset defrosting pressure range, the system controls whether the refrigeration equipment enters or exits the defrosting mode.

[0055] Specifically, when the frosting pressure is greater than or equal to the first pressure value, the refrigeration equipment is controlled to enter the defrosting mode and begin defrosting. As the defrosting mode continues, the frost layer melts continuously under the action of the defrosting device, and the pressure acting on the sensor decreases accordingly. When the collected frosting pressure is less than or equal to the second pressure value, the controller issues a command to exit the defrosting mode, thereby completing the defrosting process.

[0056] The defrosting method provided by this invention replaces the original timed defrosting method, and makes up for the problem that the traditional defrosting sensor can only control the exit from defrosting and is not accurate enough. The new thin-film pressure defrosting sensor can control the entry and exit points of defrosting at the same time, achieving more accurate on-demand defrosting, which can bring a good positive effect on the energy saving and preservation of the refrigerator.

[0057] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0058] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0059] Figure 1 A structural block diagram of a refrigeration device according to one embodiment of the present invention is shown;

[0060] Figure 2 A schematic diagram of the detection unit in one embodiment of the present invention is shown;

[0061] Figure 3 A schematic diagram of the deformation of the detection unit under force is shown in one embodiment of the present invention;

[0062] Figure 4 A schematic diagram of the defrosting detection component in one embodiment of the present invention is shown;

[0063] Figure 5 A schematic diagram of the defrosting detection component in one embodiment of the present invention is shown;

[0064] Figure 6 A schematic flowchart of a defrosting method in one embodiment of the present invention is shown;

[0065] Figure 7 A schematic flowchart of a defrosting method in one embodiment of the present invention is shown;

[0066] Figure 8 A schematic diagram of the heat exchange tube in one embodiment of the present invention is shown.

[0067] in, Figures 1 to 5 and Figure 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0068] 100: Defrosting detection component; 102: Thin-film pressure sensor; 1022: Detection section; 1024: Connector section; 1026: Microstructure layer; 1028: Conductive layer; 1032: Electrode layer; 1034: Substrate layer; 1036: Adhesive layer; 1038: First encapsulation layer; 1039: Second encapsulation layer; 104: Controller.

[0069] 200: Refrigeration equipment; 202: Heat exchanger; 2022: Heat exchange tube; 2024: First tube section; 2026: Second tube section; 203: Heat exchange section; 204: Defrosting device; 2042: Heater; 206: Heat exchange fins. Detailed Implementation

[0070] To better understand the above-described objectives, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0071] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0072] The following reference Figures 1 to 8 Some embodiments of the present invention are described.

[0073] like Figure 1 and Figure 2As shown, the defrosting detection component 100 proposed in this embodiment includes a thin-film pressure sensor 102 and a controller 104. The thin-film pressure sensor 102 is mainly used to convert pressure signals into electrical signals, including a detection part 1022 and a connection part 1024. The detection part 1022 is used to sense the pressure acting on its surface when frost forms, and associates the pressure signal with the electrical signal, thereby converting the pressure signal into a transmittable electrical signal. It can be understood that when the frost pressure acting on the detection part 1022 is different, the corresponding electrical signal will also be different.

[0074] It is important to note that the thin-film pressure sensor 102, due to its small size and thinness, maintains the original cooling performance of the equipment while collecting frost pressure. Its large size does not alter the airflow distribution within the chamber, and it eliminates the influence of the environment on defrosting signal acquisition. The thin-film pressure sensor 102 senses the frost pressure, converts the pressure signal into an electrical signal, and transmits it to the controller 104 to perform on-demand defrosting.

[0075] The connecting part 1024 is connected to the detection part 1022 and is used to transmit the electrical signal converted by the detection part 1022 through the connecting part 1024. The connecting part 1024 can be regarded as the connecting link between the detection part 1022 and the controller 104, and is mainly used for the transmission of electrical signals. Simply put, with the cooperation of the detection part 1022 and the connecting part 1024, the conversion and transmission of pressure signals and electrical signals are realized, which is an important component of the pressure sensor.

[0076] The present invention provides a defrosting detection component 100, such as... Figure 1 As shown, it is used for refrigeration equipment 200, mainly for defrosting detection of refrigeration equipment 200, which includes heat exchanger 202.

[0077] It should be added that the detection unit 1022 needs to be in close contact with the outer wall of the heat exchange tube 2022 of the heat exchanger 202. From a structural perspective, this design can increase the contact area between the two, making it easier to fix the detection unit 1022 on the outer wall of the heat exchange tube 2022. This improves the stability of the pressure sensor during installation and prevents the sensor from falling off the heat exchange tube 2022, thereby reducing the accuracy of the detection signal and preventing equipment damage caused by drop impacts. From a functional perspective, it can better collect the frost signal on the outer wall of the heat exchange tube 2022, determine the frost pressure on the side of the detection unit 1022 away from the heat exchange tube 2022, and can also serve as the basis for entering and exiting defrosting. This provides a reliable signal for the subsequent control judgment of the controller 104, indirectly improving the accuracy and reliability of defrosting detection.

[0078] The controller 104 is mainly used to control electrical signals. By judging the electrical signals, it issues different action commands. The controller 104 is electrically connected to the connection part 1024 to receive the electrical signals converted by the detection part 1022 and compare them with the pressure threshold (or a set range) preset inside the controller 104 to determine whether the refrigeration equipment 200 enters or exits defrosting mode. For example, when the frost pressure received by the controller 104 is greater than or equal to the first pressure value, it indicates that the frost thickness inside the cabinet is too large, affecting heat exchange performance and increasing air resistance. The refrigeration equipment 200 enters the defrosting mode. Similarly, when the frost pressure is less than or equal to the second pressure value, it indicates that the temperature inside the cabinet is too high, which is not conducive to food storage and causes energy waste. The refrigeration equipment 200 exits the defrosting mode and completes the defrosting operation.

[0079] It should be noted that the method of bonding between the detection unit 1022 and the outer wall of the heat exchange tube 2022 is not limited here. It can be bonded by adhesive, adsorption, or other fixing methods, as long as the installation is reasonable.

[0080] Furthermore, the present invention does not limit the shape, size, or thickness of the detection part 1022 and the connecting part 1024 in the pressure sensor. For example, a rectangle, a circle, or other shapes are all acceptable, as long as the design is reasonable and meets its own set conditions.

[0081] Through the above design, this solution effectively solves the problems of inaccurate defrosting cycles and imperfect defrosting effects in the refrigeration equipment 200, achieving on-demand defrosting. Specifically, by using a thin-film pressure sensor 102 instead of a piezoelectric device, the problem of altering the airflow distribution within the evaporator chamber due to excessive sensor size is reduced, maintaining the original refrigeration performance of the equipment. Simultaneously, the influence of the environment on defrosting signal acquisition is eliminated, improving defrosting reliability. Through the invention and design of the sensor, coupled with the instructions of the controller 104, an automated, multi-level control defrosting system is provided for the defrosting detection component 100. This system measures the frost thickness in real time, significantly improving the intelligent defrosting capability of the refrigeration equipment 200. When the frost pressure is greater than or equal to the first pressure value, the system enters defrosting mode; when the frost pressure is less than or equal to the second pressure value, it exits defrosting mode, repeating this cycle continuously. This truly achieves automated intelligent control, freeing up human intervention and avoiding energy loss and reduced energy efficiency caused by on-time defrosting. This greatly improves the accuracy and reliability of the defrosting cycle, thereby ensuring the working efficiency of the refrigeration equipment 200. In addition, by using a thin-film pressure sensor 102 instead of a piezoelectric device, the problem of altering the airflow distribution in the evaporator chamber due to the excessive size of the sensor is reduced, thus maintaining the original cooling performance of the equipment. At the same time, the influence of the environment on defrost signal acquisition is eliminated, improving the reliability of defrosting. This results in lower costs and greater stability.

[0082] In some embodiments, the heat exchanger 202 may optionally include a plurality of parallel heat exchange fins through which the heat exchange tube 2022 passes. Such a design can increase the heat transfer area. By increasing the number and area of ​​the fins, the surface area of ​​the heat exchanger 202 is significantly expanded, the thermal resistance is reduced, and the gas flow is enhanced, thereby improving the heat exchange efficiency.

[0083] In addition, such as Figure 8 As shown, the heat exchanger 202 also includes multiple heat exchange sections 203 arranged along the direction of gravity. The design of multiple heat exchange sections 203 allows for heat exchange over a larger area, improving heat transfer efficiency. The thin-film pressure sensor 102 is mounted on the outer wall of the lowest heat exchange section 203. By defining the sensor's installation position, the relative positional relationship between the sensor and the heat exchanger 202 can be clearly defined, thereby eliminating the influence of other environmental factors on the sensor's frost signal and improving the reliability of signal acquisition. Furthermore, the lowest position design in the heat exchange section provides a certain degree of structural protection, preventing foreign objects from falling or impacting the sensor.

[0084] It is important to note that the thin-film pressure sensor 102 is located on the side of the heat exchange section 203 away from the ground, ensuring that the pressure sensing surface is perpendicular to the direction of gravity. This ensures that the pressure from the frost acts entirely on the sensor and is not diverted by forces from other directions, making the pressure signal collected by the sensor more convincing and thus improving the accuracy of the sensor signal acquisition.

[0085] like Figure 5 As shown, the heat exchange tube 2022 includes a first tube section 2024 and a second tube section 2026, which are connected in the direction of gravity. The first tube section 2024 is above the second tube section 2026. By defining the relative positions of the first tube section 2024 and the second tube section 2026, the installation position of the sensor is further clarified. The detection part 1022 of the sensor must be fully or at least partially attached to the outer wall of the first tube section 2024 to prevent the pressure generated during frost from being diverted by other forces. For example, when the sensor is installed upside down, gravity will offset part of the pressure, thereby improving the accuracy and reliability of signal acquisition.

[0086] It should be added that there are no restrictions on the shape design of the heat exchange tube 2022. For example, it can be round, square, or other shapes.

[0087] In some embodiments, optionally, such as Figure 5As shown, the heat exchange tube 2022 is defined as a circular tube. This design satisfies the heat exchange effect while also being aesthetically pleasing. It not only enhances the heat exchange capacity of the heat exchange tube 2022 but also improves its anti-fouling performance. Furthermore, the first tube segment 2024 and the second tube segment 2026 are separated along the axial interface. This limitation allows for a better understanding of the external structure of the heat exchange tube 2022 and clarifies the relative positional relationship between the first tube segment 2024 and the second tube segment 2026, thereby determining the contact position of the detection unit 1022.

[0088] It is understood that the detection unit 1022 is attached to the first pipe section 2024 and located above the second pipe section 2026 in the direction of gravity. When the frosting pressure acts on the detection unit 1022, the pressure signal is collected to the maximum extent and converted into an electrical signal, which is then transmitted to the controller 104 to ensure the reliability and accuracy of the defrosting detection system.

[0089] In some embodiments, optionally, such as Figure 4 As shown, the detection unit 1022 is attached to the outer wall of the heat exchange tube 2022, and at least part of the tangent of the outer wall of the heat exchange tube 2022 is perpendicular to the direction of gravity. This condition is actually to further ensure the accuracy of the pressure signal collected by the detection unit 1022. It can be understood that the more perpendicular the tangent of the outer wall of the detection unit 1022 where it is attached to the heat exchange tube 2022 is to the direction of gravity, the less the pressure of frost acting on the detection unit 1022 is offset by other forces (such as gravity), and the more accurate the pressure signal collected will be, thus improving the reliability of signal acquisition.

[0090] It is understandable that placing the detection unit 1022 on the heat exchange tube 2022, through its thin-film design, allows for real-time measurement of the frost thickness on the heat exchange tube 2022. This not only satisfies signal acquisition and transmission requirements but also effectively reduces the volume occupied in the chamber, without altering the airflow distribution within the chamber and thus affecting the original cooling performance. This enables the refrigeration equipment 200 to determine whether to enter defrost mode based on the actual frost condition of the heat exchange tube, achieving on-demand defrosting and more precise defrost control.

[0091] In some embodiments, the direction perpendicular to the direction of gravity is defined as the first direction. The heat exchange tube 2022 is provided with multiple heat exchange sections at intervals in the first direction. By defining the structure of the heat exchange tube 2022, the composition and arrangement of the heat exchange tube 2022 can be more intuitively understood. The design of multiple heat exchange sections in the first direction can improve the heat exchange efficiency of the heat exchanger 202 and increase the heat exchange with the air.

[0092] In addition, the thin-film pressure sensor 102 is set on the outer wall of one or more heat exchange sections other than the two ends in the first direction of the heat exchange tube 2022. By further defining the installation position of the sensor, the relative positional relationship between the sensor and the heat exchange tube 2022 can be more clearly defined. Its arrangement in the middle plays a certain degree of protection in terms of structure, and at the same time, it eliminates the influence of other environmental factors on the sensor signal acquisition, thereby improving the accuracy and reliability of defrosting detection.

[0093] It is understandable that the design mode of the thin film pressure sensor 102 being located in the middle can protect it to a certain extent. When an external object impacts the heat exchange tube 2022 along the first direction, it will first act on the heat exchange sections at both ends, thereby ensuring that the thin film pressure sensor 102 is not affected and that the sensor can work stably. Here, there is no limitation on the installation position and number of heat exchange sections of the sensor in the first direction. The thin film pressure sensor 102 can be installed on any heat exchange section other than the two ends in the first direction, or one or more can be installed on this basis.

[0094] In one embodiment, such as Figure 2 As shown, the detection unit 1022 includes a microstructure layer 1026, a conductive layer 1028, an electrode layer 1032, and a substrate layer 1034, which are arranged in a stacked configuration. Specifically, the microstructure layer 1026 is designed to deform under pressure, which can be understood as... Figure 3 As shown, based on its own structural characteristics, when the pressure F generated by the frost of the refrigeration device 200 acts on the surface of the detection unit 1022, the microstructure layer 1026 is closer to the pressure surface, and the pressure will preferentially act on the microstructure layer 1026, causing it to deform. Since the microstructure layer 1026 and the conductive layer 1028 are in overlapping contact, the conductive layer 1028 will also deform, thereby changing the contact area between the conductive layer 1028 and the electrode layer 1032, resulting in a change in the resistance of the conductive layer 1028. The conductive layer 1028 is connected to the connection unit 1024 to transmit the electrical signal to the controller 104, realizing the conversion of the pressure signal into an electrical signal.

[0095] In simple terms, the thin-film pressure sensor 102 operates on the piezoresistive response principle. When the material with surface microstructure is subjected to pressure, it deforms, changing the contact area and contact resistance between the conductive layer 1028 and the electrode layer 1032. This, in turn, correlates the pressure with the electrical signal, converting the pressure acting on the surface during frost formation into an electrical signal for transmission, thus achieving the pressure measurement function. The frost layer accumulates on the sensor to form pressure, and by measuring the frost weight pressure, the thickness of the frost layer on the heat exchanger 202 is reflected, enabling real-time measurement of the amount of frost on the heat exchanger 202.

[0096] In one specific embodiment, the detection unit 1022 further includes a first encapsulation layer 1038 and a second encapsulation layer 1039. The function of the encapsulation layers is to support and protect the other components between them. Specifically, the first encapsulation layer 1038 is located on the side of the microstructure layer 1026 away from the base layer 1034. It is used to support the frost layer and mainly plays a role in protecting the microstructure layer 1026 and other structures. When the cooling device 200 starts to frost, the frost layer will accumulate on the surface of the first encapsulation layer 1038, and the frost pressure will directly act on the first encapsulation layer 1038, playing a role in isolation and protection, which can improve the service life of the sensor.

[0097] In another specific embodiment, similarly, the second encapsulation layer 1039 is disposed on the side of the base layer 1034 away from the microstructure layer 1026, mainly playing a supporting and protective role. By providing the second encapsulation layer 1039 in the detection section 1022, it not only protects the structure such as the microstructure layer 1026, but also has the effect of bearing and supporting, so that the detection section 1022 has a certain degree of stability.

[0098] It should be added that the encapsulation layer and the microstructure layer 1026, the encapsulation layer and the substrate layer 1034, and the conductive layer 1028 and the electrode layer 1032 are bonded together by an adhesive layer 1036. This connection method helps to fix the two in the proper position and ensures that they will not fall off during transportation or use.

[0099] In summary, due to the structural design of the detection unit 1022, the thin-film pressure sensor 102 has advantages such as small size and thin thickness, which effectively reduces the space occupied by the sensor, reduces product cost, and improves defrosting reliability. In addition, its close contact with the wall of the heat exchanger 202 will not affect the original cooling performance of the heat exchanger 202. At the same time, since it directly measures the weight of the frost layer on the sensing area to reflect the frost layer thickness, it does not need to be used with other devices to eliminate the influence of environmental conditions, thus achieving higher stability.

[0100] In one specific embodiment, by limiting the way the detection part 1022 is attached to the outer wall of the heat exchange tube 2022, the detection part 1022 can be firmly fixed to the outer wall of the heat exchange tube 2022, which improves the contact stability between the two. At the same time, this fixing method does not require drilling holes or using screws on the object, resulting in a neat appearance and avoiding damage to the original structure.

[0101] A second aspect of the present invention provides a refrigeration device 200, including: a heat exchanger 202, a defrosting detection component 100 and a defrosting device 204, wherein the heat exchanger 202 plays the role of transferring heat energy and realizing heat exchange between cold and hot media in the refrigeration device 200.

[0102] The defrosting detection component 100 is used to detect the thickness of the frost layer in the refrigeration equipment 200, thereby converting the pressure signal generated by the frost layer thickness into an electrical signal and transmitting it to the controller 104.

[0103] The defrosting device 204 is used to defrost the refrigeration equipment 200, maintaining the refrigerator's cooling efficiency by melting the frost layer. Specifically, it is positioned opposite the heat exchanger 202. When the refrigeration equipment 200 enters defrosting mode, the defrosting device 204 starts working to defrost; when the refrigeration equipment 200 exits defrosting mode, the defrosting device 204 stops operating.

[0104] It can be understood that the defrosting device 204 is the executor of the entire defrosting system. It does not have the ability to judge instructions, but only the ability to receive signals. When the controller 104 gives an instruction to require the refrigeration equipment 200 to enter the defrosting state, the defrosting device starts to work. Conversely, when the refrigeration equipment 200 exits the defrosting state, the defrosting device stops working. The defrosting device must have the ability to quickly switch operating modes.

[0105] In some embodiments, the defrosting device 204 may optionally include a heater 2042. The refrigeration equipment 200 performs the defrosting operation of the frost layer through the heater 2042. Specifically, in the defrosting mode, the controller 104 of the defrosting detection component 100 acts on the refrigeration equipment 200, issues a defrosting command, and controls the heater 2042 to heat the heat exchanger 202. Under the action of the fins on the surface of the heat exchange tube 2022 and multiple heat exchange sections, the frost layer on the surface of the heat exchanger 202 is melted, thereby achieving the purpose of defrosting and maintaining the refrigeration efficiency of the refrigeration equipment 200.

[0106] A third aspect of the present invention provides a defrosting method, such as... Figure 7 As shown, this defrosting method includes: step S102: determining the frosting pressure through the thin-film pressure sensor of the refrigeration equipment; step S104: obtaining the preset defrosting pressure range corresponding to the refrigeration equipment; step S106: controlling the refrigeration equipment to enter or exit the defrosting mode according to the frosting pressure and the preset defrosting pressure range.

[0107] Understandably, the refrigeration equipment collects the frost pressure signal through sensors and transmits it to the relevant control equipment. Then, it compares the collected pressure signal with a pre-set pressure range to determine whether the refrigeration equipment should enter defrosting mode.

[0108] In one embodiment, the preset defrost pressure range endpoints include a first pressure value and a second pressure value, with the first pressure value being greater than the second pressure value. By defining the relationship between the two, the different limiting effects produced by different pressure values ​​are clarified, providing a comparative reference for the collected frosting pressure. Based on the frosting pressure and the preset defrost pressure range, the system controls whether the refrigeration equipment enters or exits the defrost mode.

[0109] Specifically, when the frosting pressure is greater than or equal to the first pressure value, the refrigeration equipment is controlled to enter the defrosting mode and begin defrosting. As the defrosting mode continues, the frost layer melts continuously under the action of the defrosting device, and the pressure acting on the sensor decreases accordingly. When the collected frosting pressure is less than or equal to the second pressure value, the controller issues a command to exit the defrosting mode, thereby completing the defrosting process.

[0110] The defrosting method provided by this invention replaces the original timed defrosting method, and makes up for the problem that the traditional defrosting sensor can only control the exit from defrosting and is not accurate enough. The new thin-film pressure defrosting sensor can control the entry and exit points of defrosting at the same time, achieving more accurate on-demand defrosting, which can bring a good positive effect on the energy saving and preservation of the refrigerator.

[0111] In one embodiment, prolonged refrigerator operation and user door opening and closing can cause frost to form on the evaporator surface. Accumulated frost can affect the heat exchanger's performance and increase gas flow resistance. Therefore, defrosting the refrigerator evaporator is necessary. Typically, refrigerator defrosting control uses a fixed-cycle defrosting (timed defrosting). Inaccurate defrosting cycle control can lead to two extreme outcomes: defrosting only when there is too little frost or defrosting only when there is too much frost. Over-defrosting wastes energy and increases the refrigerator compartment temperature, which is detrimental to food storage. Failure to defrost in time results in excessive frost buildup on the evaporator, reducing heat exchange efficiency, extending compressor operating time, and lowering the refrigerator's energy efficiency. Currently, there are defrosting sensors that use piezoelectric devices. Frost buildup on the piezoelectric element affects the vibration frequency to obtain a frost signal. However, because piezoelectric elements are affected by ambient temperature, humidity, and wind speed, two piezoelectric elements need to be measured simultaneously (one with frost and one without) to eliminate environmental influences. Using two elements together can lead to reliability issues; if one element fails, it significantly affects the output frost thickness signal, impacting defrosting accuracy. Meanwhile, the existing piezoelectric defrosting sensors are too large, which can easily change the airflow distribution in the evaporator cavity and affect the original cooling performance of the evaporator.

[0112] To address the above issues, this invention provides a defrost sensor, which is a small-sized thin-film pressure sensor arranged on the evaporator tube. It measures the frost thickness on the evaporator in real time, allowing the refrigerator to determine whether to enter defrost mode based on the actual frost condition, enabling on-demand defrosting and more precise defrost control. Prolonged refrigerator operation and user door opening and closing cause frost to form on the evaporator surface. Accumulated frost affects the heat exchanger's performance and increases gas flow resistance. Therefore, periodic defrosting is necessary. However, defrosting allows hot air to enter the compartment, which is detrimental to food storage. Thus, a more efficient defrosting method is needed. This defrost sensor, positioned on the evaporator tube wall, serves as both the basis for initiating and exiting defrost. When frost begins to accumulate on the evaporator, the sensor experiences pressure and outputs a pressure signal, which is then converted into a frost thickness reading for judgment. When the frost thickness reaches its maximum value, defrosting is initiated. Similarly, as the defrosting process progresses, the pressure on the thin-film pressure sensor decreases continuously. When the pressure decreases to the target level, it is considered that the defrosting is complete, and the defrosting process can be terminated.

[0113] In summary, this specific embodiment can solve the problem of insufficient precision in the defrosting cycle control of refrigerators, which can only defrost on time instead of on demand. It can also solve the problems of large size and low reliability of existing piezoelectric sensors.

[0114] In one specific embodiment, a defrosting sensor (i.e., a thin-film pressure sensor 102) is provided, which is a thin-film pressure sensor installed in close contact with the tube wall of the evaporator (i.e., heat exchanger 202). The thin-film pressure sensor 102 is as follows... Figure 2 As shown, it mainly consists of a microstructure substrate (i.e., microstructure layer 1026), a conductive coating (i.e., conductive layer 1028), a data acquisition electrode (i.e., electrode layer 1032), and an encapsulation layer (i.e., first encapsulation layer 1038 and second encapsulation layer 1039). The thin-film pressure sensor 102 operates on the piezoresistive response principle. The material with surface microstructures deforms under pressure, changing the contact area and contact resistance between the conductive layer 1028 and the electrode. Figure 3 As shown, pressure-electrical signals are then correlated to achieve pressure measurement. Frost accumulates on the sensor, creating pressure. By measuring the frost weight pressure, the thickness of the frost layer on the evaporator is reflected, enabling real-time measurement of the amount of frost on the evaporator.

[0115] The pressure sensing area (i.e., detection unit 1022) of the thin-film pressure sensor 102 is adhered to the middle wall of the lowest row of tubes in the evaporator using thermally conductive adhesive. The installation direction of the sensing area should ensure that the pressure sensing surface is perpendicular to the direction of gravity. During the refrigeration cycle, frost continuously accumulates on the pressure sensing area. The pressure sensing area receives the pressure signal and transmits it through the wiring terminal (i.e., connection unit 1024). After the system calculates the frost layer thickness, it determines whether the critical frost level has been reached to enter defrost mode. The defrost exit principle is the same. During the defrost heating stage, the frost layer on the pressure sensing area continuously thins and drips, and the pressure signal gradually decreases. When the target pressure value is reached, the defrost mode exits. The new thin-film pressure defrost sensor can simultaneously control the entry and exit points of defrost, avoiding the previous experience-based timed defrost mode and achieving more precise on-demand defrosting, which is beneficial for optimizing the refrigerator's energy saving and preservation effects.

[0116] Specific implementation such as Figure 6 As shown, when the refrigerator is powered on, step S302: the membrane pressure sensor collects the pressure Pf of the frost weight on the evaporator tube; step S304: determine if Pf ≥ Pon; if yes, then step S306: the refrigeration equipment enters defrosting mode; if no, repeat step S304; the membrane pressure sensor continues to collect the pressure Pf of the frost weight on the evaporator tube; step S308: determine if Pf ≤ Poff; if yes, then step S310: the refrigeration equipment exits defrosting mode; otherwise, repeat step S308.

[0117] Wherein, Pon is the preset pressure value to start the defrosting mode, i.e., the first pressure value, and Poff is the preset pressure value to exit the defrosting mode, i.e., the second pressure value.

[0118] The thin-film pressure sensor 102 has advantages such as small size and thinness, and its close contact with the evaporator wall will not affect the original cooling performance of the evaporator. At the same time, since it directly measures the weight of the frost layer on the sensing area to reflect the frost layer thickness, it does not need to be used with other devices to eliminate the influence of environmental conditions, thus achieving higher stability.

[0119] Traditional defrost sensors can only control the exit from defrost mode, and this control is not precise enough. The control during the defrost entry phase is still based on a timed defrost cycle. The new thin-film pressure defrost sensor can simultaneously control both the entry and exit points of defrost, avoiding the previous experience-based timed defrost mode and achieving more precise on-demand defrosting. This results in a significant positive effect on the refrigerator's energy efficiency and food preservation.

[0120] Existing piezoelectric sensors are bulky and have low reliability. Adopting a new thin-film pressure defrosting sensor can effectively reduce the sensor's footprint, lower product costs, and improve defrosting reliability.

[0121] According to the defrosting detection component, refrigeration equipment and defrosting method provided by the present invention, the use of a thin-film pressure sensor can effectively reduce the space occupied by the heat exchanger chamber, ensure the cooling air volume, and at the same time take into account the accurate entry and exit of the defrosting mode of the refrigeration equipment.

[0122] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0123] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0124] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A defrosting detection component, characterized in that, For use in refrigeration equipment, the refrigeration equipment including a heat exchanger, the defrosting detection component including: A thin-film pressure sensor includes a detection part and a connecting part connected together. The detection part is in contact with the outer wall of the heat exchange tube of the heat exchanger. The thin-film pressure sensor is used to determine the frosting pressure on the side of the detection part away from the heat exchange tube. A controller, electrically connected to the connection part, is used to control the refrigeration equipment to enter the defrosting mode when the frosting pressure is not less than a first pressure value, and / or to control the refrigeration equipment to exit the defrosting mode when the frosting pressure is not greater than a second pressure value.

2. The defrosting detection component according to claim 1, characterized in that, The heat exchanger includes multiple parallel heat exchange fins, the heat exchange tube passes through the heat exchange fins, the heat exchange tube includes multiple heat exchange sections arranged along the direction of gravity, and the thin-film pressure sensor is disposed on the outer wall of the lowest one of the multiple heat exchange sections. The thin-film pressure sensor is located on the side of the heat exchange section away from the ground.

3. The defrosting detection component according to claim 1, characterized in that, The heat exchange tube includes a first tube segment and a second tube segment connected in the direction of gravity. The first tube segment is located above the second tube segment, and at least part of the detection part is attached to the outer wall of the first tube segment.

4. The defrosting detection component according to claim 3, characterized in that, The heat exchange tube is circular, and the first tube segment and the second tube segment are separated by the axial section of the heat exchange tube through the axis of the heat exchange tube.

5. The defrosting detection component according to claim 2, characterized in that, The heat exchange tube includes a plurality of heat exchange sections spaced apart along a first direction perpendicular to the direction of gravity, and the thin-film pressure sensor is disposed on the outer wall of at least one of the plurality of heat exchange sections except for the heat exchange sections located at both ends of the first direction.

6. The defrosting detection component according to any one of claims 1 to 5, characterized in that, The detection unit specifically includes: The microstructure layer, conductive layer, electrode layer, and substrate layer are stacked together. The microstructure layer is used to deform under pressure, thereby causing the conductive layer to deform. The contact area between the conductive layer and the electrode layer changes, thereby changing the resistance of the conductive layer. The conductive layer is connected to the connecting portion. A first encapsulation layer and a second encapsulation layer, wherein the first encapsulation layer is disposed on the side of the microstructure layer away from the substrate layer, and the second encapsulation layer is disposed on the side of the substrate layer away from the microstructure layer.

7. The defrosting detection component according to any one of claims 1 to 5, characterized in that, At least a portion of the outer wall of the heat exchange tube that is in contact with the detection unit has a tangent perpendicular to the direction of gravity; and / or The detection unit is attached to the outer wall of the heat exchange tube.

8. A refrigeration device, characterized in that, include: Heat exchanger; Defrost detection component as described in any one of claims 1 to 7; A defrosting device is disposed opposite to the heat exchanger. The defrosting device is used to operate when the refrigeration equipment enters the defrosting mode and to stop operating when the refrigeration equipment exits the defrosting mode. The defrosting device includes a heater, and the controller of the defrosting detection component is used to control the heater to heat the heat exchanger when the refrigeration equipment enters the defrosting mode.

9. A defrosting method, characterized in that, The defrosting method for the refrigeration equipment of claim 8 includes: The frosting pressure is determined by the thin-film pressure sensor of the refrigeration equipment. Obtain the preset defrosting pressure range corresponding to the refrigeration equipment; Based on the frosting pressure and the preset defrosting pressure range, the refrigeration equipment is controlled to enter or exit the defrosting mode.

10. The defrosting method according to claim 9, characterized in that, The endpoints of the preset defrost pressure range include a first pressure value and a second pressure value, where the first pressure value is greater than the second pressure value. Based on the frosting pressure and the preset defrost pressure range, the refrigeration equipment is controlled to enter or exit defrost mode, specifically including: When the frosting pressure is not less than the first pressure value, the refrigeration equipment is controlled to enter the defrosting mode. When the refrigeration equipment is in the defrosting mode and the frosting pressure is not greater than the second pressure value, the refrigeration equipment is controlled to exit the defrosting mode.

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