Defrosting circuit system of refrigerator
The refrigerator controller detects the door status and controls the defrost water box to heat the defrost, which solves the problem of water accumulation in the defrost water box when the refrigerator door is opened, and achieves the accuracy of defrost and the service life of the refrigerator.
Patent Information
- Application Number
- CN202422084640.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing refrigerator has accelerated the water accumulation rate of the defrost water box when the door is open, causing water to overflow and erode the internal structure of the refrigerator, shortening its service life.
The door status is detected by the refrigerator controller unit, the heating and defrost process of the defrost water box is controlled, and the wind speed is adjusted in combination with the refrigeration fan to achieve accurate defrost of the defrost water box.
Avoid overflow of water from defrosting water box, protect the internal structure of the refrigerator, and extend the service life of the refrigerator.
Smart Images
Figure CN223138193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigerator systems, in particular to a defrosting circuit system for a refrigerator. Background Art
[0002] At present, for refrigerators on the market, in the design process of the defrosting circuit, it is generally focused on the defrosting treatment of the defrosting water box when the refrigerator door is closed, and it operates automatically according to the refrigeration and defrosting cycles preset at the factory. However, when the refrigerator door is in the open state, a large amount of water vapor in the external environment will enter the inner cavity of the refrigerator, which exacerbates the water accumulation speed of the defrosting water box of the refrigerator. This will not only cause the water in the defrosting water box to overflow when it is full, but may also erode the metal components and structures inside the refrigerator, shortening the service life of the refrigerator. Summary of the Utility Model
[0003] The utility model provides a defrosting circuit system for a refrigerator to at least solve problems such as how to accurately defrost the water in the water box of the refrigerator in the related art. The technical solution of the utility model is as follows:
[0004] According to the first aspect of the embodiment of the utility model, a defrosting circuit system for a refrigerator is provided, including a refrigerator controller unit, a first voltage branch, a second voltage branch, and a heating defrosting branch;
[0005] The input end of the first voltage branch is connected to the door magnetic switch of the refrigerator door; the output end of the first voltage branch is connected to the refrigerator controller unit; the first voltage branch is used to obtain the refrigerator door driving voltage and send it to the refrigerator controller unit;
[0006] The refrigerator controller unit is used to receive the refrigerator door driving voltage, convert it into refrigerator door pressure information, and send the refrigerator door pressure information to the second voltage branch when the refrigerator door pressure information indicates that the refrigerator door is in the open state;
[0007] The second voltage branch is used to feedback the defrosting water box driving voltage to the refrigerator controller unit when receiving the refrigerator door pressure information;
[0008] The refrigerator controller unit is further used to receive the defrosting water box driving voltage, convert the defrosting water box driving voltage into defrosting water box pressure information, and send the heating temperature information corresponding to the defrosting water box pressure information to the heating defrosting branch; the defrosting water box pressure information is used to represent the defrosting water box liquid level information; the heating temperature information is positively correlated with the defrosting water box pressure information;
[0009] The heating defrosting branch is used to receive the heating temperature information and heat and defrost the water in the defrosting water box.
[0010] In a possible implementation, the defrost circuit system of the refrigerator further includes a freezing fan branch, on which a freezing fan is provided, and the freezing fan branch is connected to the refrigerator controller unit; the refrigerator controller unit is further configured to send a wind speed adjustment message to the freezing fan when the refrigerator is in an open state; the freezing fan is configured to receive the wind speed modulation message and adjust the wind speed.
[0011] In a possible implementation, the first voltage branch includes a resistor-capacitor filtering circuit, a first pressure sensor, a left door magnetic switch of the refrigerator, and a right door magnetic switch of the refrigerator; the resistor-capacitor filtering circuit includes a first resistor-capacitor filtering circuit, a second resistor-capacitor filtering circuit, and a third resistor-capacitor filtering circuit; the resistor-capacitor filtering circuit is configured to filter the first voltage branch; the first resistor-capacitor filtering circuit includes a first resistor and a third capacitor, and the first resistor is respectively connected to the first pressure sensor and the third capacitor; the third capacitor is further connected to the ground terminal;
[0012] The second resistor-capacitor filtering circuit includes a second resistor and a second capacitor, the second resistor is respectively connected to the left door magnetic switch of the refrigerator and the second capacitor, and the second capacitor is further connected to the ground terminal; the third resistor-capacitor filtering circuit includes a third capacitor and a first capacitor, the third resistor is respectively connected to the right door magnetic switch of the refrigerator and the first capacitor, and the first capacitor is further connected to the ground terminal.
[0013] In a possible implementation, the first voltage branch further includes a first connector and a fourth resistor; the first pressure sensor is connected to the first connector, and the first pressure sensor and the fourth resistor are connected to obtain the voltage information of the refrigerator door flip beam and send it to the refrigerator controller unit; the refrigerator controller unit is further configured to receive the voltage information of the refrigerator door flip beam and convert it into the pressure information of the refrigerator door.
[0014] In a possible implementation, the first voltage branch further includes a fifth resistor and a sixth resistor; the left door magnetic switch of the refrigerator is connected to the first connector, and the left door magnetic switch of the refrigerator is further connected to the fifth resistor, and is configured to obtain the driving voltage of the left door of the refrigerator and transmit it to the refrigerator controller unit; the right door magnetic switch of the refrigerator is connected to the first connector, and the right door magnetic switch of the refrigerator is further connected to the sixth resistor, and is configured to obtain the driving voltage of the right door of the refrigerator and transmit it to the refrigerator controller unit; the driving voltage of the refrigerator door includes the driving voltage of the left door of the refrigerator and the driving voltage of the right door of the refrigerator; the refrigerator controller unit is further configured to receive the driving voltage of the left door of the refrigerator and convert it into the pressure information of the left door of the refrigerator; receive the driving voltage of the right door of the refrigerator and convert it into the pressure information of the right door of the refrigerator; the pressure information of the refrigerator door includes the pressure information of the left door of the refrigerator and the pressure information of the right door of the refrigerator.
[0015] In a possible implementation, the second voltage branch includes a water box RC filtering circuit; the water box RC filtering circuit includes a fourth RC filtering circuit and a fifth RC filtering circuit; the water box RC filtering circuit is configured to filter the second voltage branch; the fourth RC filtering circuit includes a seventh resistor and a fifth capacitor; the fifth RC filtering circuit includes an eighth resistor and a fourth capacitor.
[0016] In a possible implementation, the second voltage branch further includes a ninth resistor; the pressure sensor of the defrost water box is connected to the ninth resistor, and is configured to obtain the driving voltage of the defrost water box and send the driving voltage of the defrost water box to the refrigerator controller unit; the refrigerator controller unit is further configured to receive the driving voltage of the defrost water box and convert it into the pressure information of the defrost water box.
[0017] In a possible implementation, the refrigerator defrost circuit system further includes an evaporator branch; the evaporator branch includes a freezing defrost sensor and a tenth resistor; the tenth resistor is connected to the freezing defrost sensor and is configured to obtain the driving voltage of the refrigerator evaporator and send it to the refrigerator controller unit; the refrigerator controller unit is configured to receive the driving voltage of the refrigerator evaporator and convert it into the evaporator temperature information.
[0018] In a possible implementation, the refrigeration fan branch includes a refrigeration fan speed control circuit and a refrigeration fan feedback circuit; the refrigeration fan speed control circuit includes an eleventh resistor, a twelfth resistor, a first pull-down resistor, a first triode, a second triode, an inductor, an electrolytic capacitor, a first clamping diode, and a second clamping diode; the eleventh resistor is connected to the first triode, and the second triode is respectively connected to the first pull-down resistor and the twelfth resistor; the electrolytic capacitor is connected to the inductor for filtering the refrigeration fan speed control module; the inductor is respectively connected to the first clamping diode and the second clamping diode;
[0019] The refrigeration fan feedback circuit includes a fifth capacitor, a pull-up resistor, a thirteenth resistor, and a refrigeration fan feedback unit; the refrigeration fan feedback circuit is used to obtain the working state of the refrigeration fan; the pull-up resistor is connected to the power supply; the thirteenth resistor is connected to the refrigeration fan feedback unit.
[0020] In a possible implementation, the heating and defrosting branch includes a refrigeration defrosting heater, a fourteenth resistor, a third triode, a second pull-down resistor, a relay, and a third diode; the fourteenth resistor is connected to the third triode, and the second pull-down resistor is connected between the third triode and the ground terminal; the relay is respectively connected to the power supply and the third triode, and the third diode is connected across the relay.
[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present invention.
[0022] The technical solutions provided by the embodiments of the present invention at least bring the following beneficial effects:
[0023] The refrigerator controller unit is respectively connected to the first voltage branch, the second voltage branch, and the heating and defrosting branch, which can improve the reliability and accuracy of information transmission;
[0024] The second voltage branch is used to feedback the defrost water box drive voltage to the refrigerator controller unit when receiving the refrigerator door pressure information; the refrigerator controller unit receives the defrost water box drive voltage, converts it into defrost water box pressure information, and sends the heating information corresponding to the defrost water box pressure information to the heating and defrosting branch; the heating and defrosting branch is used to receive the heating temperature information and heat the water in the defrost water box, which can achieve precise defrosting of the defrost water box, avoid water overflow in the defrost water box, and improve the service life of the refrigerator.
[0025] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] To more clearly illustrate the technical solutions and advantages in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0027] Figure 1 It is a structural diagram of a refrigerator defrosting circuit system shown according to an exemplary embodiment.
[0028] Figure 2 It is a circuit diagram of a first voltage branch shown according to an exemplary embodiment.
[0029] Figure 3 It is a circuit diagram of a second voltage branch and a freezing fan branch shown according to an exemplary embodiment.
[0030] Figure 4 It is a circuit diagram of a heating defrosting branch shown according to an exemplary embodiment. Detailed implementation manners
[0031] To enable those of ordinary skill in the art to better understand the technical solutions of this utility model, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only some embodiments of the specification, rather than all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this utility model.
[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of this utility model and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0033] Various exemplary embodiments, features, and aspects of the present utility model will be described in detail below with reference to the accompanying drawings. Like reference numerals in the drawings denote functionally identical or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.
[0034] As used herein, the term "exemplary" means "serving as an example, embodiment, or illustration". Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. As used herein, the term "and / or" merely describes an associative relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A alone, both A and B present, or B alone. In addition, as used herein, the term "at least one" means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.
[0035] Unless otherwise specified, the directions in this document should be understood as follows: the direction close to the user is the front, and the direction away from the user is the back.
[0036] In addition, for a better description of the present utility model, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present utility model can also be implemented without some specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present utility model.
[0037] It should be noted that the following shows a possible order of steps, but in fact, it is not necessarily required to strictly follow this order. Some steps can be executed in parallel without dependence. The user information (including but not limited to user device information, user personal information, user behavior information, etc.) and data (including but not limited to data for display, training data, etc.) involved in the present utility model are all information and data authorized by the user or fully authorized by all parties.
[0038] Figure 1 is a structural diagram of a refrigerator defrosting circuit system shown according to an exemplary embodiment. As Figure 1 shown, the refrigerator circuit system includes a refrigerator controller unit, a first voltage branch, a second voltage branch, and a heating defrosting branch.
[0039] The refrigerator controller unit establishes communication connections with the first voltage branch, the second voltage branch, and the heating and defrosting branch respectively. Specifically, the communication connection methods can include wired communication and wireless communication. Among them, the wired communication methods can include wire connection, cable connection, etc., and the wireless communication methods can include wireless network communication, Bluetooth communication, etc. The present utility model does not limit this. The refrigerator controller unit can be a refrigerator microcontroller unit (MCU), which is a chip-level computer integrating functions such as a CPU (central processing unit), a memory (RAM, ROM, etc.), an input / output (I / O) interface, a timer / counter, and an interrupt system.
[0040] Figure 2 It is a circuit diagram of a first voltage branch shown according to an exemplary embodiment. As Figure 2 shown, the first voltage branch includes a resistor-capacitor filter circuit, and the resistor-capacitor filter circuit includes a first resistor-capacitor filter circuit, a second resistor-capacitor filter circuit, and a third resistor-capacitor filter circuit. The first resistor R1 and the third capacitor C3 form the first resistor-capacitor filter circuit, the second resistor R2 and the second capacitor C2 form the second resistor-capacitor filter circuit, and the third resistor R3 and the first capacitor C1 form the third resistor-capacitor filter circuit. The first resistor-capacitor filter circuit, the second resistor-capacitor filter circuit, and the third resistor-capacitor filter circuit are all used to filter the high-frequency noise or clutter of the signal in the first voltage branch, reduce the interference of the power supply, and maintain the DC or low-frequency components of the signal.
[0041] In the first voltage branch, the first resistor R1 is respectively connected to the first pressure sensor and the third capacitor C3, and one end of the third capacitor C3 is also connected to the ground terminal; the second resistor R2 is respectively connected to the left door magnetic switch of the refrigerator and the second capacitor C2, and one end of the second capacitor C2 is also connected to the ground terminal; the third resistor R3 is respectively connected to the right door magnetic switch of the refrigerator and the first capacitor C1, and the first capacitor is also connected to the ground terminal. Among them, the first resistor R1, the second resistor R2, and the third resistor R3 can adopt resistors with a resistance value of 4.7 kΩ, and the first capacitor C1, the second capacitor C2, and the third capacitor C3 can adopt capacitors with a capacitance value of 104 pF. Sampling resistors with the above resistance values and capacitors with the above capacitance values is mainly to filter the 5V power supply and reduce the interference of the first voltage branch to the 5V power supply.
[0042] The first voltage branch further includes a door magnetic switch of the refrigerator door, a first pressure sensor, and a first connector CN1. In the present invention, the refrigerator may refer to a single-door refrigerator or a double-door refrigerator. In the case of a double-door refrigerator, the door magnetic switch of the refrigerator door includes a left-door magnetic switch of the refrigerator and a right-door magnetic switch of the refrigerator. The first pressure sensor is disposed on the flip beam of the left door of the refrigerator. A plurality of pins are provided on the first connector CN1. The first pressure sensor is connected to the first pin and the second pin of the first connector CN1. The first pressure sensor is further connected to a fourth resistor R4 to form a voltage division circuit. When the left door of the refrigerator is opened or closed, the resistance value of the first pressure sensor changes. At the same time, the voltage of the fourth resistor R4 changes, that is, it is detected that the voltage information of the flip beam of the refrigerator door changes, and the voltage information of the flip beam of the refrigerator door is sent to the refrigerator control unit. The refrigerator control unit receives the voltage information of the flip beam of the refrigerator door and converts the voltage information of the flip beam of the refrigerator door into the pressure information of the refrigerator door.
[0043] The left-door magnetic switch of the refrigerator is connected to the third pin and the fourth pin of the first connector CN1, and the right-door magnetic switch of the refrigerator is connected to the fifth pin and the sixth pin of the first connector CN1; wherein the fourth pin and the sixth pin are connected to the ground terminal. The left-door magnetic switch of the refrigerator is further connected to a fifth resistor R5, and the right-door magnetic switch of the refrigerator is further connected to a sixth resistor R6. The fifth resistor and the sixth resistor are respectively connected to a +5V power supply. During the opening and closing process of the left door of the refrigerator, the resistance of the left-door magnetic switch of the refrigerator changes. At the same time, the voltage of the fifth resistor R5 also changes. At this time, the corresponding driving voltage of the left door of the refrigerator can be obtained and sent to the refrigerator control unit. The refrigerator control unit receives the driving voltage of the left door of the refrigerator and converts it into the pressure information of the left door of the refrigerator. The refrigerator control unit will judge the pressure information of the left door of the refrigerator, that is, judge the driving voltage of the left door of the refrigerator. If it is detected that the driving voltage of the left door of the refrigerator is at a high level, the left door of the refrigerator is in an open state; if it is detected that the left door of the refrigerator is at a low level, the left door of the refrigerator is in a closed state. Both the driving voltage of the left door of the refrigerator and the voltage information of the flip beam of the refrigerator door are used to judge the opening and closing state of the left door of the refrigerator. In the case where the driving voltage of the left door of the refrigerator and the voltage information of the flip beam of the refrigerator door are inconsistent, the refrigerator control unit can display the corresponding abnormal situation on the visual screen of the refrigerator door.
[0044] Similarly, during the opening and closing process of the right door of the refrigerator, the resistance of the magnetic switch of the right door of the refrigerator changes, and the voltage of the corresponding sixth resistor R6 also changes. At this time, the driving voltage of the right door of the refrigerator can be obtained and transmitted to the refrigerator controller unit. After receiving the driving voltage of the right door of the refrigerator, the refrigerator controller unit converts the driving voltage of the right door of the refrigerator into the corresponding pressure information of the right door of the refrigerator. In the present utility model, the first voltage branch can be packaged using 0805. 0805 is a commonly used electronic component packaging size, with a length and width of 8 mm and 5 mm respectively. Using 0805 for packaging can improve the anti-static property of the first voltage branch.
[0045] Figure 3 is a circuit diagram of a second voltage branch and a freezing fan branch shown according to an exemplary embodiment. As Figure 3 shown, Figure 3 it includes a freezing fan branch, and the freezing fan branch includes a freezing fan speed regulation circuit and a freezing fan feedback circuit. The freezing fan speed regulation circuit includes an eleventh resistor R11, a twelfth resistor R12, a first pull-down resistor R15, a first triode Q1, a second triode Q2, an inductor L1, an electrolytic capacitor EC1, a first clamping diode D1, and a second clamping diode D2. When the pressure information of the refrigerator door indicates that the refrigerator door is in the open state, the refrigerator controller unit sends a wind speed modulation information to the freezing fan branch. After receiving the wind speed modulation information in the freezing fan speed regulation circuit, the freezing fan speed regulation port outputs a high level. At this time, the second triode Q2 turns on, and correspondingly, the first triode Q1 also turns on, so that the freezing fan is powered by the +12V power supply. One end of the twelfth resistor R12 is connected to the freezing fan speed regulation port, and the other end is connected to the base of the second triode Q2. When the power supply provides current to the second triode Q2, the twelfth resistor R12 is used to limit the current to protect the second triode Q2 from being damaged due to overcurrent.
[0046] One end of the first pull-down resistor R15 is connected to the base of the second triode Q2, and the other end is connected to the ground terminal. When the second triode Q2 is not working, the first pull-down resistor R15 can ensure that the potential of the base of the second triode Q2 is pulled down to near the ground potential, which can prevent the charge accumulation on the base of the second triode and avoid accidental conduction caused by factors such as parasitic capacitance. The second triode Q2 may form a parasitic capacitance with other components through the printed circuit board PCB (Printed Circuit Board). When the circuit state switches, this parasitic capacitance may store charges, resulting in circuit instability. For example, the adjustment of the freezing fan wind speed or the switching of the freezing fan on / off state is not limited in the present utility model. Setting the first pull-down resistor R15 can provide a low-impedance path, allowing the charges on the parasitic capacitance to discharge quickly, maintaining the stability and reliability of the circuit.
[0047] The speed control circuit of the refrigeration fan further includes a sixteenth resistor R16 and a seventeenth resistor R17. Both the sixteenth resistor R16 and the seventeenth resistor R17 are connected to the first triode Q1. When the second triode Q2 is in the open state, the sixteenth resistor R16 and the seventeenth resistor R17 are also used to limit the current of the first triode Q1, thereby protecting the stability of the first triode Q1. The eleventh resistor R11 is connected to the first triode Q1. The eleventh resistor R11 is provided to discharge the parasitic capacitance of the first triode Q1. Exemplarily, when the second triode Q2 is turned off, the eleventh resistor R11 can provide a discharge path, enabling the parasitic capacitance of the first triode Q1 to gradually discharge through this path, thereby accelerating the turn-off speed of the first triode Q1 and improving the stability of the refrigeration fan speed control circuit at the same time.
[0048] The inductor L1 in the refrigeration fan speed control circuit is respectively connected to a first clamping diode D1 and a second clamping diode D2, and the inductor L1 is also connected to an electrolytic capacitor EC1. When the current in the inductor L1 suddenly interrupts, for example, when the refrigeration fan is turned off, at this time, the inductor L1 will generate a reverse electromotive force to maintain the current unchanged. However, this reverse electromotive force is relatively large and may damage other components in the circuit. Furthermore, the first clamping diode D1 and the second clamping diode D2 will conduct at this time, clamping the voltage across the inductor within a safe range, thereby protecting the circuit. The inductor L1 and the electrolytic capacitor EC1 form a filter circuit. When the inductor L1 blocks the passage of alternating current, the electrolytic capacitor EC1 can provide the path required for this alternating current, thereby further smoothing the output voltage. The refrigeration fan speed control circuit is also connected to the first pin and the second pin of the second connector CN2, and the first pin is also connected to the ground terminal.
[0049] The refrigeration fan feedback circuit includes a fifth capacitor C5, a pull-up resistor R18, a thirteenth resistor R13, and a refrigeration fan feedback unit. The refrigeration fan feedback circuit is connected between the third pin and the fourth pin of the second connector CN2. The refrigeration fan feedback unit is used to obtain the working state of the refrigeration fan in the refrigeration fan speed control circuit and send the working state to the refrigerator controller unit. The refrigerator controller unit is used to receive the working state of the refrigeration fan and judge the fault condition of the refrigeration fan. In the case where the refrigerator controller unit indicates that the refrigeration fan has a fault, it is displayed on the refrigerator visualization screen, thereby reminding the user to perform timely maintenance.
[0050] One end of the sixth capacitor C6 is connected to the refrigeration fan feedback unit, and the other end is connected to the ground terminal, which is used to filter out high-frequency noise and impurities in the refrigeration fan feedback circuit. The thirteenth resistor R13 is connected to the refrigeration fan feedback unit to prevent the current in the refrigeration fan feedback circuit from being too large and damaging the components in the circuit. The pull-up resistor R18 is connected to the power supply to pull an uncertain input signal to a definite high level, avoiding misjudgment when the refrigeration fan feedback unit feeds back the working state of the refrigeration fan.
[0051] Figure 3 It also includes a second voltage branch, and the second voltage branch includes a water box RC filtering circuit and a pressure sensor of the defrost water box. The water box RC filtering circuit includes a fourth RC filtering circuit and a fifth RC filtering circuit. Among them, the seventh resistor R7 and the fifth capacitor C5 form the fourth RC filtering circuit, which is used to filter the circuit of the pressure sensor of the defrost water box. The eighth resistor R8 and the fourth capacitor C4 form the fifth RC filtering circuit, which is used to filter the evaporator branch. The second voltage branch is also connected to the seventh and eighth pins of the second connector CN2, and the evaporator branch is connected to the ninth and tenth pins of the second connector CN2.
[0052] The refrigerator controller unit is also used to send the refrigerator door pressure information to the second voltage branch. When the second voltage branch receives the refrigerator door pressure information, that is, when the refrigerator door is in the open state, it detects the defrost water box drive voltage. Specifically, when the pressure sensor of the defrost water box is under pressure, its resistance value will also change. At the same time, the voltage of the ninth resistor R9 connected to the pressure sensor of the defrost water box will also change, that is, the corresponding defrost water box drive voltage can be obtained and fed back to the refrigerator controller unit. After receiving the defrost water box drive voltage, the refrigerator controller unit converts the defrost water box drive voltage into defrost water box pressure information, and then sends the heating temperature corresponding to the defrost water box pressure information to the heating defrost branch. Among them, the defrost water box pressure information is used to represent the defrost water box liquid level information.
[0053] During the defrosting process, the refrigerator defrost circuit system also includes an evaporator branch. The evaporator branch includes a freezing defrost sensor and a tenth resistor R10. When the refrigerator evaporator changes, the resistance value of the freezing defrost sensor will change. At the same time, the voltage of the corresponding tenth resistor R10 will also change, that is, the corresponding refrigerator evaporator drive voltage can be obtained and sent to the refrigerator controller unit. The refrigerator controller unit receives the refrigerator evaporator drive voltage and converts it into evaporator temperature information, that is, the temperature corresponding to the evaporator can be determined in real time. When the refrigerator controller unit obtains that the evaporator temperature information is greater than the preset temperature, for example, zero degrees Celsius, which is not limited in this utility model, at this time, a stop heating information is sent to the heating defrost branch.
[0054] Figure 4 is a circuit diagram of a heating defrosting branch shown according to an exemplary embodiment. As Figure 4 shown, the refrigerator defrosting circuit system further includes a heating defrosting branch, and the heating defrosting branch includes a freezing defrosting heater, a fourteenth resistor R14, a third triode Q3, a second pull-down resistor R19, a relay REY1, and a third diode D3. The freezing defrosting heater is connected to the first pin and the fourth pin of the third connector CN3 and is connected with a 220V power supply. The fourteenth resistor R14 is used to limit the current of the heating defrosting branch, thereby protecting the stable conduction of the third triode Q3. The second pull-down resistor R19 is connected to the third triode Q3 and is used to release the parasitic capacitance of the third triode Q3, so that the circuit can return to the stable state more quickly when it is turned off. The refrigerator controller unit is connected to the heating defrosting branch. After the heating defrosting branch receives the heating temperature information sent by the refrigerator controller unit, wherein the heating temperature information may include the heating temperature and the heating time. Specifically, the freezing defrosting heater is set to a high level. At this time, the third triode Q3 is turned on, the relay REY1 is attracted, and the freezing defrosting heater heats the water in the defrosting water box according to the heating temperature information. The third diode D3 is connected across the relay REY1 and is used to provide a current to consume the energy stored in the second inductor L2 and absorb the spike voltage when the relay REY1 is powered off, preventing the back electromotive force generated when the relay REY1 coil is powered off from damaging other components in the heating defrosting branch. Setting multiple components of the heating defrosting branch can improve the accuracy of information transmission and the precision of refrigerator defrosting, and realize the safe and reliable operation of the circuit during heating defrosting.
[0055] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.
[0056] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.
Claims
1. A defrosting circuit system for a refrigerator, characterized in that, It includes a refrigerator controller unit, a first voltage branch, a second voltage branch, and a heating and defrosting branch; The input end of the first voltage branch is connected to the door magnetic switch of the refrigerator door; the output end of the first voltage branch is connected to the refrigerator controller unit; the first voltage branch is used to obtain the refrigerator door drive voltage and send it to the refrigerator controller unit; The refrigerator controller unit is used to receive the refrigerator door drive voltage, convert it into refrigerator door pressure information, and send the refrigerator door pressure information to the second voltage branch when the refrigerator door pressure information indicates that the refrigerator door is in the open state; The second voltage branch is used to feedback the defrost water box drive voltage to the refrigerator controller unit when receiving the refrigerator door pressure information; The refrigerator controller unit is also used to receive the defrost water box drive voltage, convert the defrost water box drive voltage into defrost water box pressure information, and send the heating temperature information corresponding to the defrost water box pressure information to the heating and defrosting branch; the defrost water box pressure information is used to represent the defrost water box liquid level information; the heating temperature information is positively correlated with the defrost water box pressure information; The heating and defrosting branch is used to receive the heating temperature information and heat and defrost the water in the defrost water box.
2. The defrosting circuit system of the refrigerator according to claim 1, wherein The refrigerator defrost circuit system further includes a freezing fan branch, on which a freezing fan is provided, and the freezing fan branch is connected to the refrigerator controller unit; The refrigerator controller unit is also used to send wind speed modulation information to the freezing fan when the refrigerator is in the open state; the freezing fan is used to receive the wind speed modulation information and adjust the wind speed.
3. The defrosting circuit system of the refrigerator according to claim 1, characterized in that, The first voltage branch includes a resistor-capacitor filter circuit, a first pressure sensor, a refrigerator left door magnetic switch, and a refrigerator right door magnetic switch; The resistor-capacitor filter circuit includes a first resistor-capacitor filter circuit, a second resistor-capacitor filter circuit, and a third resistor-capacitor filter circuit; the resistor-capacitor filter circuit is used to filter the first voltage branch; the first resistor-capacitor filter circuit includes a first resistor and a third capacitor, and the first resistor is respectively connected to the first pressure sensor and the third capacitor; the third capacitor is also connected to the ground terminal; The second resistor-capacitor filter circuit includes a second resistor and a second capacitor, the second resistor is respectively connected to the refrigerator left door magnetic switch and the second capacitor, and the second capacitor is also connected to the ground terminal; the third resistor-capacitor filter circuit includes a third resistor and a first capacitor, the third resistor is respectively connected to the refrigerator right door magnetic switch and the first capacitor, and the first capacitor is also connected to the ground terminal.
4. The defrosting circuit system of the refrigerator according to claim 3, characterized in that, The first voltage branch further includes a first connector and a fourth resistor; The first pressure sensor is connected to the first connector, and the first pressure sensor is connected to the fourth resistor, and is used to obtain the refrigerator door flip beam voltage information and send it to the refrigerator controller unit; the refrigerator controller unit is also used to receive the refrigerator door flip beam voltage information and convert it into refrigerator door pressure information.
5. The defrost circuit system of the refrigerator according to claim 4, characterized in that, The first voltage branch further includes a fifth resistor and a sixth resistor; The left door magnetic switch of the refrigerator is connected to the first connector, and the left door magnetic switch of the refrigerator is also connected to the fifth resistor, for obtaining the driving voltage of the left door of the refrigerator and transmitting it to the refrigerator controller unit; the right door magnetic switch of the refrigerator is connected to the first connector, and the right door magnetic switch of the refrigerator is also connected to the sixth resistor, for obtaining the driving voltage of the right door of the refrigerator and transmitting it to the refrigerator controller unit; the driving voltage of the refrigerator door includes the driving voltage of the left door of the refrigerator and the driving voltage of the right door of the refrigerator. The refrigerator controller unit is further configured to receive the driving voltage of the left door of the refrigerator and convert it into the pressure information of the left door of the refrigerator; receive the driving voltage of the right door of the refrigerator and convert it into the pressure information of the right door of the refrigerator; the pressure information of the refrigerator door includes the pressure information of the left door of the refrigerator and the pressure information of the right door of the refrigerator.
6. The defrosting circuit system of the refrigerator according to claim 1, wherein, The second voltage branch includes a water box RC filtering circuit. The water box RC filtering circuit includes a fourth RC filtering circuit and a fifth RC filtering circuit; the water box RC filtering circuit is used for filtering the second voltage branch; the fourth RC filtering circuit includes a seventh resistor and a fifth capacitor; the fifth RC filtering circuit includes an eighth resistor and a fourth capacitor.
7. The defrosting circuit system of the refrigerator according to claim 6, wherein The second voltage branch further includes a ninth resistor. The pressure sensor of the defrost water box is connected to the ninth resistor, for obtaining the driving voltage of the defrost water box and sending the driving voltage of the defrost water box to the refrigerator controller unit; the refrigerator controller unit is further configured to receive the driving voltage of the defrost water box and convert it into the pressure information of the defrost water box.
8. The defrosting circuit system of the refrigerator according to claim 1, wherein The refrigerator defrost circuit system further includes an evaporator branch. The evaporator branch includes a freezing defrost sensor and a tenth resistor; the tenth resistor is connected to the freezing defrost sensor, for obtaining the driving voltage of the refrigerator evaporator and sending it to the refrigerator controller unit; the refrigerator controller unit is configured to receive the driving voltage of the refrigerator evaporator and convert it into the evaporator temperature information.
9. The defrosting circuit system of the refrigerator according to claim 2, characterized in that The freezing fan branch includes a freezing fan speed regulation circuit and a freezing fan feedback circuit. The freezing fan speed regulation circuit includes an eleventh resistor, a twelfth resistor, a first pull-down resistor, a first triode, a second triode, an inductor, an electrolytic capacitor, a first clamping diode, and a second clamping diode; the eleventh resistor is connected to the first triode, and the second triode is respectively connected to the first pull-down resistor and the twelfth resistor; the electrolytic capacitor is connected to the inductor for filtering the freezing fan speed regulation module; the inductor is respectively connected to the first clamping diode and the second clamping diode. The freezing fan feedback circuit includes a fifth capacitor, a pull-up resistor, a thirteenth resistor, and a freezing fan feedback unit; the freezing fan feedback circuit is used for obtaining the working state of the freezing fan; the pull-up resistor is connected to the power supply; the thirteenth resistor is connected to the freezing fan feedback unit.
10. The defrosting circuit system of the refrigerator according to claim 2, characterized in that, The heating defrost branch includes a freezing defrost heater, a fourteenth resistor, a third triode, a second pull-down resistor, a relay, and a third diode. The fourteenth resistor is connected to the third triode, and the second pull-down resistor is connected between the third triode and the ground terminal; the relay is respectively connected to the power supply and the third triode, and the third diode is connected across the relay.