Anti-impact circuit, direct-current refrigerator and electrical equipment

Abstract

The utility model relates to the technical field of circuit anti-impact processing, and provides an anti-impact circuit, a direct current refrigerator and electrical equipment, the anti-impact circuit comprises a first power supply connecting module and a second power supply connecting module, the input end of the first power supply connecting module is connected with the input end of the second power supply connecting module; the first power supply connecting module and the second power supply connecting module are respectively used for connecting different loads; and the delay conduction module is connected with the output end of the second power supply connection module. The time-delay conduction module is connected with the second power supply connection module, so that the second power supply connection module is conducted after the first power supply connection module and outputs electric energy, and then first instantaneous current impact generated by the first power supply connection module and second instantaneous current impact generated by the second power supply connection module are separated in a time-delay mode. And therefore, larger instantaneous current impact caused by superposition of the two is avoided, and the effect of preventing the instantaneous current impact from being too large is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit impact prevention processing, in particular to an impact prevention circuit, a DC refrigerator and an electrical appliance device. Background Art

[0002] The DC refrigerator is powered by direct current and is often used in scenarios such as vehicle use and outdoor camping. With the development of refrigerator technology, in order to independently control the refrigerating chamber and the freezing chamber without mutual influence, a dual-system DC refrigerator has emerged, that is, two power supply circuits are provided for the load devices corresponding to the refrigerating chamber and the freezing chamber to work. For a dual-system DC refrigerator, due to the existence of two power supply circuits, when power is turned on, the instantaneous current impacts generated by the two power supply circuits are superimposed, resulting in the magnitude of the instantaneous current impact being approximately twice that of the original, and there is a problem of excessive instantaneous current impact.

[0003] In the prior art, for the instantaneous current impact, a thermistor structure is generally adopted. By virtue of the characteristic that the resistance value of the thermistor is relatively large at normal temperature, excessive instantaneous current impact is avoided when power is turned on. As current flows through the thermistor and causes heating, the resistance of the thermistor becomes smaller, reducing the influence on the subsequent current. However, in a dual-system DC refrigerator, due to the existence of two power supply circuits, in order to reduce the instantaneous current impact to an acceptable range, it is necessary to correspondingly increase the resistance value of the thermistor, resulting in increased power consumption and heating of the thermistor during stable operation.

[0004] Therefore, how to avoid excessive instantaneous current impact when power is turned on caused by the dual power supply circuit is an urgent problem to be solved. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the related art. For this purpose, the utility model provides an impact prevention circuit, achieving the effect of preventing excessive instantaneous current impact.

[0006] The utility model also provides a DC refrigerator and an electrical appliance device.

[0007] An impact prevention circuit according to an embodiment of the first aspect of the utility model includes: a first power supply connection module and a second power supply connection module, the input end of the first power supply connection module is connected to the input end of the second power supply connection module, and the first power supply connection module and the second power supply connection module are respectively used for connecting different loads; a delay conduction module, connected to the output end of the second power supply connection module, and the delay conduction module is used to make the second power supply connection module delay in outputting electric energy compared with the first power supply connection module.

[0008] According to an embodiment of the present utility model, the delay conduction module includes a delay unit and a first switching tube. The input end of the delay unit is connected to the output end of the second power supply connection module. The output end of the delay unit is connected to the controlled end of the first switching tube. The output end of the second power supply connection module is connected to the load through the first switching tube.

[0009] According to an embodiment of the present utility model, the delay unit includes at least one delay resistor and at least one delay capacitor. One end of the delay resistor is connected to the positive output end of the second power supply connection module. The other end of the delay resistor is respectively connected to the controlled end of the first switching tube and one end of the delay capacitor. The other end of the delay capacitor is connected to the negative output end of the second power supply connection module or grounded.

[0010] According to an embodiment of the present utility model, it further includes: a first voltage stabilizing tube and a first voltage dividing resistor. The cathode of the first voltage stabilizing tube is respectively connected to one end of the first voltage dividing resistor, the other end of the delay resistor, the controlled end of the first switching tube, and one end of the delay capacitor. The anode of the first voltage stabilizing tube and the other end of the first voltage dividing resistor are both connected to the negative output end of the second power supply connection module or both grounded.

[0011] According to an embodiment of the present utility model, it further includes: an anti-reverse connection module connected to the output end of the first power supply connection module.

[0012] According to an embodiment of the present utility model, the anti-reverse connection module includes a voltage dividing unit and a second switching tube. The input end of the voltage dividing unit is connected to the output end of the first power supply connection module. The output end of the voltage dividing unit is connected to the controlled end of the second switching tube. The first power supply connection module is connected to the load through the second switching tube.

[0013] According to an embodiment of the present utility model, the voltage dividing unit includes a second voltage dividing resistor, a third voltage dividing resistor, and a second voltage stabilizing tube. One end of the second voltage dividing resistor is connected to the positive output end of the first power supply connection module. The other end of the second voltage dividing resistor is respectively connected to one end of the third voltage dividing resistor, the cathode of the second voltage stabilizing tube, and the controlled end of the second switching tube. The other end of the third voltage dividing resistor and the anode of the second voltage stabilizing tube are both connected to the negative output end of the first power supply connection module or both grounded.

[0014] According to an embodiment of the present utility model, the first power connection module includes a first fuse, a first thermistor, and a first filter capacitor. One end of the first fuse is connected to the positive pole of the power supply, the other end of the first fuse is connected to one end of the first thermistor, the other end of the first thermistor is respectively connected to one end of the first filter capacitor and the load, and the other end of the first filter capacitor is connected to the negative pole of the power supply or grounded;

[0015] And / or, the second power connection module includes a second fuse, a second thermistor, and a second filter capacitor. One end of the second fuse is connected to the positive pole of the power supply, the other end of the second fuse is connected to one end of the second thermistor, the other end of the second thermistor is respectively connected to one end of the first filter capacitor and the delay conduction module, and the other end of the second filter capacitor is connected to the negative pole of the power supply or grounded.

[0016] A DC refrigerator according to an embodiment of the second aspect of the present utility model includes: a body, the body is provided with the above-mentioned anti-shock circuit, the body is further provided with a first load module and a second load module, the output end of the first power connection module is connected to the first load module, and the second power connection module is connected to the second load module.

[0017] According to an embodiment of the third aspect of the present utility model, an electrical device includes: a device body, and the device body is provided with the above-mentioned anti-shock circuit.

[0018] One or more of the above technical solutions in the embodiments of the present utility model have at least the following technical effects:

[0019] The input ends of the first power connection module and the second power connection module are connected to the power supply to obtain electric energy. The delay conduction module is connected to the second power connection module. When power is applied, the first power connection module is normally conducted to supply power to the load. At this time, the second power connection module is not yet conducted. The first power connection module alone generates a first instantaneous current impact. After the delay time of the delay conduction module, the second power connection module is conducted to supply power to the load. At this time, the first instantaneous current impact generated by the first power connection module has ended, and the second power connection module alone generates a second instantaneous current impact. In this way, by connecting the delay conduction module to the second power connection module, the second power connection module is conducted to output electric energy after the first power connection module, thereby delaying and separating the first instantaneous current impact generated by the first power connection module from the second instantaneous current impact generated by the second power connection module, avoiding the two from superimposing to form a larger instantaneous current impact, and achieving the effect of preventing the instantaneous current impact from being too large.

[0020] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or in the related art, the drawings required for use in the description of the embodiments or the related art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a circuit diagram of one embodiment of the anti-shock circuit provided by the present utility model.

[0023] Figure 2 is a schematic diagram of the instantaneous current impact generated when the anti-shock circuit provided by the present utility model is powered on.

[0024] Reference Signs:

[0025] 100, First Power Supply Connection Module; 110, First Fuse; 120, First Thermistor; 130, First Filter Capacitor; 200, Second Power Supply Connection Module; 210, Second Fuse; 220, Second Thermistor; 230, Second Filter Capacitor; 300, Delay Conduction Module; 310, Delay Unit; 320, First Switching Transistor; 311, Delay Resistor; 312, Delay Capacitor; 400, First Zener Diode; 500, First Voltage Dividing Resistor; 600, Reverse Connection Prevention Module; 610, Voltage Dividing Unit; 611, Second Voltage Dividing Resistor; 612, Third Voltage Dividing Resistor; 613, Second Zener Diode; 620, Second Switching Transistor. Detailed Embodiments

[0026] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0027] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0029] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0030] Reference Figure 1 and Figure 2 As shown in [reference] and [reference], the present utility model provides a shock-proof circuit, including: a first power connection module 100 and a second power connection module 200. The input end of the first power connection module 100 is connected to the input end of the second power connection module 200. The first power connection module 100 and the second power connection module 200 are respectively used to connect different loads; a delay conduction module 300, which is connected to the output end of the second power connection module 200. The delay conduction module 300 is used to make the second power connection module 200 delay in outputting electric energy compared with the first power connection module 100.

[0031] The input ends of the first power connection module 100 and the second power connection module 200 are connected to a power supply to obtain electrical energy. The delay conduction module 300 is connected to the second power connection module 200. When powering on, the first power connection module 100 conducts normally to supply power to the load. At this time, the second power connection module 200 has not conducted yet, and the first power connection module 100 generates a first instantaneous current impact alone. After the delay time of the delay conduction module 300, the second power connection module 200 conducts to supply power to the load. At this time, the first instantaneous current impact generated by the first power connection module 100 has ended, and the second power connection module 200 generates a second instantaneous current impact alone. In this way, by connecting the delay conduction module 300 to the second power connection module 200, the second power connection module 200 conducts to output electrical energy after the first power connection module 100, and further separates the first instantaneous current impact generated by the first power connection module 100 and the second instantaneous current impact generated by the second power connection module 200 with a time delay, as Figure 2 shown, to avoid the superposition of the two to form a larger instantaneous current impact, achieving the effect of preventing the instantaneous current impact from being too large.

[0032] The first power connection module 100 and the second power connection module 200 are respectively connected to the corresponding loads to form two independent loops. In some embodiments of the present invention, when applied to a dual-system DC refrigerator, it can meet the power supply requirements of the dual system.

[0033] Refer to Figure 1 , in some embodiments of the impact prevention circuit of the present invention, the delay conduction module 300 includes a delay unit 310 and a first switch tube 320. The input end of the delay unit 310 is connected to the output end of the second power connection module 200, the output end of the delay unit 310 is connected to the controlled end of the first switch tube 320, and the output end of the second power connection module 200 is connected to the load through the first switch tube 320.

[0034] When powering on, the delay unit 310 obtains electrical energy from the second power connection module 200 and starts to work. At this time, the first switch tube 320 is cut off, so that the loop between the second power connection module 200 and the load has not conducted yet. After the delay time, the delay unit 310 controls the controlled end of the first switch tube 320 to make the first switch tube 320 conduct, and then a loop is formed between the second power connection module 200 and the load to work. In this way, by controlling the conduction state of the first switch tube 320 through the delay unit 310, the effect of delayed conduction is achieved.

[0035] In some embodiments of the present utility model, the delay conduction module 300 may also be an embodiment including a relay and a timer. The timer controls the relay to close after a preset delay time when powered on, and then enables conduction between the second power connection module 200 and the load to form a loop, realizing the function of delay conduction.

[0036] In some embodiments of the present utility model, the first switching tube 320 may specifically be an embodiment of a device having conduction and cut-off functions such as a field effect transistor, a triode, etc.

[0037] Reference Figure 1 , in some embodiments of the impact protection circuit of the present utility model, the delay unit 310 includes at least one delay resistor 311 and at least one delay capacitor 312. One end of the delay resistor 311 is connected to the positive output terminal of the second power connection module 200, and the other end of the delay resistor 311 is respectively connected to the controlled terminal of the first switching tube 320 and one end of the delay capacitor 312. The other end of the delay capacitor 312 is connected to the negative output terminal of the second power connection module 200 or grounded.

[0038] The delay resistor 311 and the delay capacitor 312 form an RC charging delay circuit. When powered on, the positive output terminal of the second power connection module 200 outputs a voltage, and the voltage forms a charging current through the delay resistor 311 and flows to the delay capacitor 312. As the charging voltage of the delay capacitor 312 gradually rises, when the voltage of the delay capacitor 312 is greater than the conduction voltage threshold of the first switching tube 320, the first switching tube conducts. In this way, through the structure of the RC charging delay circuit formed by the delay resistor 311 and the delay capacitor 312, the function of delay control is realized, and the structure is simple and easy to implement.

[0039] It can be understood that the delay time can be adjusted by setting the resistance value of the delay resistor 311 and the capacitance value of the delay capacitor 312. The specific delay time can be calculated by the following formula:

[0040]

[0041] Wherein, t is the delay time; E is the output voltage of the second power connection module 200, Uc is the conduction voltage threshold of the first switching tube 320; R is the resistance value of the delay resistor 311; C is the capacitance value of the delay capacitor 312.

[0042] In actual application, multiple delay resistors 311 can be selected for series connection, parallel connection or series-parallel connection according to requirements to adjust the equivalent resistance value of the delay resistor 311, and multiple capacitors can be selected for parallel connection according to requirements to adjust the equivalent capacitance value of the delay capacitor 312.

[0043] In some embodiments of the present utility model, the delay unit 310 may also be an embodiment including a timing circuit. The timing circuit generates a trigger signal to control the conduction of the first switching tube 320 after a delay time when powered on, achieving the effect of delayed conduction; the delay unit 310 may also be an embodiment including devices or circuits such as a timer.

[0044] Referring to Figure 1 , in some embodiments of the anti-shock circuit of the present utility model, it further includes: a first voltage regulator tube 400 and a first voltage dividing resistor 500. The cathode of the first voltage regulator tube 400 is respectively connected to one end of the first voltage dividing resistor 500, the other end of the delay resistor 311, the controlled end of the first switching tube 320, and one end of the delay capacitor 312. The anode of the first voltage regulator tube 400 and the other end of the first voltage dividing resistor 500 are both connected to the negative output terminal of the second power supply connection module 200 or both grounded.

[0045] By connecting the first voltage regulator tube 400 and the first voltage dividing resistor 500 to the controlled end of the first switching tube 320, the voltage regulator tube can clamp the voltage at the controlled end of the first switching tube 320, that is, make the voltage at the controlled end of the first switching tube 320 more stable. The first voltage dividing resistor 500 protects the first voltage regulator tube 400 from being damaged by excessive current, improving stability.

[0046] It should be noted that the first switching tube 320, the delay resistor 311, and the first voltage dividing resistor 500 form an anti-reverse connection circuit. When the positive and negative poles at the input end of the second power supply connection module 200 are reversed, the delay resistor 311 is connected to the negative pole, and the delay resistor 311 and the first voltage dividing resistor 500 cannot form a voltage that makes the first switching tube 320 conduct, avoiding the hidden danger of reverse current flowing to the load and causing damage to the load when reverse-connected, which is beneficial to improving the safety and reliability of the circuit.

[0047] In other words, it can also be understood that the anti-reverse connection circuit and the delay conduction module 300 share the first switching tube 320 and the delay resistor 311. The first switching tube 320 simultaneously functions as delayed conduction and anti-reverse connection, which is beneficial to simplifying the circuit structure and saving device costs.

[0048] Referring to Figure 1 , in some embodiments of the anti-shock circuit of the present utility model, it further includes: an anti-reverse connection module 600 connected to the output terminal of the first power supply connection module 100.

[0049] The output terminal of the first power connection module 100 is connected to an anti-reverse connection module 600. When the power supply is reversely connected, that is, the positive and negative poles at the output terminal of the first power connection module 100 are reversed, the anti-reverse connection module 600 makes the connection between the first power connection module 100 and the load non-conductive, avoiding the reverse current flowing to the load due to the reverse connection of the power supply and causing damage to the load during operation, which is beneficial to improving the safety and reliability of the circuit.

[0050] Reference Figure 1 , in some embodiments of the anti-shock circuit of the present invention, the anti-reverse connection module 600 includes a voltage dividing unit 610 and a second switching tube 620. The input end of the voltage dividing unit 610 is connected to the output end of the first power connection module 100, the output end of the voltage dividing unit 610 is connected to the controlled end of the second switching tube 620, and the first power connection module 100 is connected to the load through the second switching tube 620.

[0051] When the first power connection module 100 is normally connected to the power supply, the voltage dividing unit 610 divides the output voltage of the first power connection module 100 to form a voltage of appropriate magnitude at the controlled end of the second switching tube 620 to drive the second switching tube 620 to conduct, and a loop is formed between the first power connection module 100 and the load to operate normally. When the first power connection module 100 is reversely connected to the power supply, the voltage dividing unit 610 is equivalent to being connected to the negative pole, generally grounded, and the voltage dividing unit 610 cannot form a voltage to drive the second switching tube 620 to conduct. The second switching tube 620 makes the connection between the first power connection module 100 and the load cut off, and a loop cannot be formed, thereby avoiding the formation of a reverse current flowing to the load. In this way, the anti-reverse connection function is realized through the structure of the voltage dividing unit 610 and the second switching tube 620, and the structure is simple and easy to implement.

[0052] In some embodiments of the present invention, the anti-reverse connection module 600 can also be an embodiment including a relay and a voltage dividing unit 610. The voltage dividing unit 610 controls the closing and opening of the relay to control the conduction state between the first power connection module 100 and the load, thereby realizing the anti-reverse connection function.

[0053] In some embodiments of the present invention, the second switching tube 620 can specifically be an embodiment of a device having conduction and cut-off functions such as a field effect transistor or a triode.

[0054] Reference Figure 1, in some embodiments of the anti-shock circuit of the present utility model, the voltage dividing unit 610 includes a second voltage dividing resistor 611, a third voltage dividing resistor 612, and a second voltage stabilizing diode 613. One end of the second voltage dividing resistor 611 is connected to the positive output terminal of the first power supply connection module 100, and the other end of the second voltage dividing resistor 611 is respectively connected to one end of the third voltage dividing resistor 612, the cathode of the second voltage stabilizing diode 613, and the controlled terminal of the second switching tube 620. The other end of the third voltage dividing resistor 612 and the anode of the second voltage stabilizing diode 613 are both connected to the negative output terminal of the first power supply connection module 100 or both grounded.

[0055] The second voltage dividing resistor 611 and the third voltage dividing resistor 612 form a voltage dividing circuit to divide the voltage output by the first power supply connection module 100. At the same time, by utilizing the characteristics of the second voltage stabilizing diode 613, the voltage at the controlled terminal of the second switching tube 620 is clamped, making the voltage at the controlled terminal of the second switching tube 620 more stable, which is beneficial to improving stability. At the same time, the third voltage dividing resistor 612 also has the effect of protecting the second voltage stabilizing diode 613 from being damaged by excessive current, improving reliability.

[0056] In some embodiments of the present utility model, the voltage dividing unit 610 can also be an embodiment including a resistor and a capacitor forming a voltage dividing circuit.

[0057] Reference Figure 1 , in some embodiments of the anti-shock circuit of the present utility model, the first power supply connection module 100 includes a first fuse 110, a first thermistor 120, and a first filter capacitor 130. One end of the first fuse 110 is connected to the positive pole of the power supply, the other end of the first fuse 110 is connected to one end of the first thermistor 120, the other end of the first thermistor 120 is respectively connected to one end of the first filter capacitor 130 and the load, and the other end of the first filter capacitor 130 is connected to the negative pole of the power supply or grounded.

[0058] The first fuse 110 melts when the current input from the power supply is too large, preventing excessive current from flowing to the backend load and causing damage to the load, which is beneficial to improving the safety of the circuit. When power is applied, the first thermistor 120 can reduce the impact of instantaneous voltage surges, avoiding excessive instantaneous voltage surges and improving the reliability of the circuit. The first filter capacitor 130 can filter out the voltage fluctuations output by the power supply, making the voltage transmitted to the backend load more stable, which is beneficial to improving the stability of the circuit.

[0059] Reference Figure 1, in some embodiments of the anti - shock circuit of the present utility model, the second power connection module 200 includes a second fuse 210, a second thermistor 220, and a second filter capacitor 230. One end of the second fuse 210 is connected to the positive pole of the power supply, the other end of the second fuse 210 is connected to one end of the second thermistor 220, the other end of the second thermistor 220 is respectively connected to one end of the first filter capacitor 130 and the delay - conduction module 300, and the other end of the second filter capacitor 230 is connected to the negative pole of the power supply or grounded.

[0060] The structure of the second power connection module 200 is substantially the same as that of the above - mentioned first power connection module 100. Similarly, it can also avoid excessive current flowing to the rear - end load and causing damage to the load, which is beneficial to improving the safety of the circuit; avoid excessive instantaneous voltage impact and improve the reliability of the circuit; make the voltage transmitted to the rear - end load more stable, which is beneficial to improving the stability of the circuit.

[0061] It can be understood that in the case where the delay - conduction module 300 is provided, there is no need to additionally increase the resistance values of the first thermistor 120 and the second thermistor 220, which is beneficial to reducing the power consumption and heat generation of the first thermistor 120 and the second thermistor 220 when in a stable state in a dual - loop scenario.

[0062] The present utility model also provides a DC refrigerator, including: a body. The body is provided with the above - mentioned anti - shock circuit. The body is also provided with a first load module and a second load module. The output end of the first power connection module 100 is connected to the first load module, and the second power connection module 200 is connected to the second load module.

[0063] The output terminal of the first power connection module 100 is connected to the first load module, and the output terminal of the second power connection module 200 is connected to the second load module. When power is applied, the first power connection module 100 conducts normally to supply power to the first load module. At this time, the second power connection module 200 has not conducted yet, and the first power connection module 100 alone generates a first instantaneous current impact; after the delay time of the delay conduction module 300, the second power connection module 200 conducts to supply power to the second load module. At this time, the first instantaneous current impact generated by the first power connection module 100 has ended, and the second power connection module 200 alone generates a second instantaneous current impact. In this way, by connecting the delay conduction module 300 to the second power connection module 200, the second power connection module 200 conducts to output electric energy after the first power connection module 100, thereby delaying and separating the first instantaneous current impact generated by the first power connection module 100 from the second instantaneous current impact generated by the second power connection module 200, avoiding the superposition of the two to form a larger instantaneous current impact, achieving the effect of preventing the instantaneous current impact from being too large, and being beneficial to making the refrigerator with a dual-system operate more stably and reliably.

[0064] The first load module and the second load module can be implementation manners of load devices or load circuits in common refrigerators including compressors and control circuits, etc.

[0065] The DC refrigerator provided by the present utility model can be applied to scenarios such as in-vehicle use and outdoor camping use.

[0066] The present utility model also provides an electrical equipment, including: an equipment body, and the equipment body is provided with the above-mentioned anti-impact circuit.

[0067] By providing the above-mentioned anti-impact circuit in the electrical equipment, and connecting the delay conduction module 300 to the second power connection module 200, the second power connection module 200 conducts to output electric energy after the first power connection module 100, thereby delaying and separating the first instantaneous current impact generated by the first power connection module 100 from the second instantaneous current impact generated by the second power connection module 200, avoiding the superposition of the two to form a larger instantaneous current impact, achieving the effect of preventing the instantaneous current impact from being too large, and making the operation of the electrical equipment more stable and reliable.

[0068] The electrical equipment can specifically be implementation manners of electrical equipment such as air conditioners and washing machines.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present utility model do not depart from the spirit and scope of the technical solutions of the present utility model and should all be covered within the scope of the claims of the present utility model.

Claims

1. An anti-shock circuit, characterized in that: include: A first power connection module and a second power connection module, wherein an input end of the first power connection module is connected to an input end of the second power connection module, and the first power connection module and the second power connection module are respectively used to connect different loads; The time-delay conduction module is connected to the output end of the second power connection module, and the time-delay conduction module is used to delay the second power connection module from outputting electric energy compared with the first power connection module.

2. The anti-shock circuit according to claim 1, characterized in that: The delayed conduction module includes a delay unit and a first switch tube, the input end of the delay unit is connected to the output end of the second power connection module, the output end of the delay unit is connected to the controlled end of the first switch tube, and the output end of the second power connection module is connected to the load through the first switch tube.

3. The anti-shock circuit according to claim 2, characterized in that: The delay unit includes at least one delay resistor and at least one delay capacitor, one end of the delay resistor is connected to the positive output end of the second power connection module, the other end of the delay resistor is respectively connected to the controlled end of the first switch tube and one end of the delay capacitor, and the other end of the delay capacitor is connected to the negative output end of the second power connection module or is grounded.

4. The anti-shock circuit according to claim 3, characterized in that: Also includes: A first voltage-stabilizing diode and a first voltage-dividing resistor, wherein the cathode of the first voltage-stabilizing diode is respectively connected to one end of the first voltage-dividing resistor, the other end of the delay resistor, the controlled end of the first switching tube and one end of the delay capacitor, and the prototype of the first voltage-stabilizing diode and the other end of the first voltage-dividing resistor are both connected to the negative output end of the second power connection module or are both grounded.

5. The anti-shock circuit according to claim 1, characterized in that: Also includes: An anti-reverse connection module connected to the output end of the first power connection module.

6. The anti-shock circuit according to claim 5, characterized in that: The anti-reverse connection module includes a voltage divider unit and a second switch tube, the input end of the voltage divider unit is connected to the output end of the first power connection module, the output end of the voltage divider unit is connected to the controlled end of the second switch tube, and the first power connection module is connected to the load through the second switch tube.

7. The anti-shock circuit according to claim 6, characterized in that: The voltage-dividing unit includes a second voltage-dividing resistor, a third voltage-dividing resistor and a second voltage-regulating tube. One end of the second voltage-dividing resistor is connected to the positive output end of the first power connection module, the other end of the second voltage-dividing resistor is respectively connected to one end of the third voltage-dividing resistor, the cathode of the second voltage-regulating tube and the controlled end of the second switching tube, and the other end of the third voltage-dividing resistor and the anode of the second voltage-regulating tube are both connected to the negative output end of the first power connection module or are both grounded.

8. The anti-shock circuit according to claim 1, characterized in that: The first power connection module includes a first fuse, a first thermistor and a first filter capacitor, one end of the first fuse is connected to the positive electrode of the power supply, the other end of the first fuse is connected to one end of the first thermistor, the other end of the first thermistor is respectively connected to one end of the first filter capacitor and the load, and the other end of the first filter capacitor is connected to the negative electrode of the power supply or is grounded; And / or, the second power connection module includes a second fuse, a second thermistor and a second filter capacitor, one end of the second fuse is connected to the positive pole of the power supply, the other end of the second fuse is connected to one end of the second thermistor, the other end of the second thermistor is respectively connected to one end of the first filter capacitor and the delay conduction module, and the other end of the second filter capacitor is connected to the negative pole of the power supply or is grounded.

9. A DC refrigerator, characterized in that: It includes: a body, the body is provided with the anti-shock circuit according to any one of claims 1 to 8, the body is also provided with a first load module and a second load module, the output end of the first power connection module is connected to the first load module, and the second power connection module is connected to the second load module.

10. An electrical device, characterized in that: include: The device body is provided with the anti-shock circuit according to any one of claims 1 to 8.

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