Electricity utilization system and motor home

Abstract

The utility model relates to a power utilization system and a motor home, the power utilization system comprises alternating current power utilization equipment, the power utilization equipment is the alternating current power utilization equipment with a direct current conversion power supply module or a heating module, and the peak voltage of power frequency alternating current adaptive to the alternating current power utilization equipment is defined as a preset voltage value; a power source; the input end of the DC-to-DC module is connected with the output end of the power supply, and the output end of the DC-to-DC module is connected with the AC input port of the AC electric equipment; the DC-to-DC module is used for converting a first DC input by the power supply into a voltage value and a second DC to supply power to the AC electric equipment, and the voltage value of the second DC is basically consistent with a preset voltage value. The power utilization system has the advantages of being low in cost, small in size, light in weight, high in electric energy conversion efficiency and high in reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle charging, in particular to a power utilization system and a motor home. BACKGROUND

[0002] With the improvement of living standards, the motor home industry is developing rapidly and has become the first choice for people's leisure travel. The motor home is equipped with air conditioners, refrigerators, televisions, washing machines, induction cookers and other household electrical equipment. Since the backup power supply on the motor home usually provides 12V, 24V or 48V DC power, the electrical equipment on the motor home is either a 12V, 24V or 48V DC electrical equipment that uses DC power supply or an AC electrical equipment. The DC electrical equipment is different from the AC electrical equipment on the market, and its selectivity is smaller. Under the same specifications, the DC electrical equipment is more expensive than the AC electrical equipment, and due to the space limitation of the motor home, a specially customized DC electrical equipment of the corresponding shape and specifications is usually required, which undoubtedly increases the cost of the DC electrical equipment, thereby increasing the cost of the motor home.

[0003] For the motor home using AC electrical equipment, in order to use the backup power supply commonly provided by 12V, 24V or 48V DC power, an inverter module needs to be configured on the vehicle to convert the DC power output by the backup power supply into AC power through the inverter module. The AC electrical equipment is powered by the corresponding DC power converted by the rectifier module of the AC electrical equipment. Due to the characteristics of large conversion loss, poor reliability, high cost and large size of the inverter module, it will inevitably result in low power utilization rate, poor reliability, increased cost and poor space utilization of the motor home. CONTENT OF THE UTILITY MODEL

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a power utilization system to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purposes and other related purposes, the present application provides a power utilization system, comprising:

[0006] At least one AC electrical equipment, the AC electrical equipment is an AC electrical equipment with a DC conversion power supply module or a heating module, and the peak voltage of the power frequency AC power adapted to the AC electrical equipment is defined as a preset voltage value;

[0007] A power supply;

[0008] A DC-to-DC module, the input end of the DC-to-DC module is connected with the output end of the power supply, and the output end of the DC-to-DC module is connected with the AC input port of the AC electrical equipment;

[0009] The direct-current to direct-current module is used for converting the first direct current input by the power supply into a second direct current to directly power the alternating current electrical equipment, wherein the voltage value of the second direct current is substantially consistent with the preset voltage value.

[0010] In an optional embodiment of the present application, the direct-current conversion power supply module includes a frequency conversion power supply module, an inverter power supply module or a switching power supply module.

[0011] In an optional embodiment of the present application, the frequency of the power frequency alternating current is 50Hz or 60Hz.

[0012] In an optional embodiment of the present application, the voltage value of the preset voltage value is between 305V-315V.

[0013] In an optional embodiment of the present application, the voltage value of the preset voltage value is between 150V-160V.

[0014] In an optional embodiment of the present application, the voltage value of the preset voltage value is between 530V-540V. In an optional embodiment of the present application, the power of the direct-current to direct-current module is between 1KW-100KW.

[0015] In an optional embodiment of the present application, the power consumption system further includes a solar panel for charging the power supply.

[0016] In an optional embodiment of the present application, the alternating current electrical equipment includes one or more of an alternating current variable frequency air conditioner, an alternating current variable frequency washing machine, an alternating current variable frequency refrigerator, an electromagnetic oven, a television, a variable frequency fan, a variable frequency hair dryer, and an electric heater.

[0017] In an optional embodiment of the present application, the power consumption system further includes an inverter, an input end of the inverter is connected with the power supply, and an output end of the inverter is connected with an alternating current socket; wherein the power of the inverter is between 10W-100W.

[0018] In an optional embodiment of the present application, the power consumption system further includes an alternating current power supply plug hole and an alternating current and direct current selection module.

[0019] The alternating current input port of the alternating current electrical equipment is connected with the alternating current power supply plug hole, and the alternating current power supply plug hole is used for external alternating current.

[0020] When the alternating current power supply is connected to the alternating current power supply plug hole, the connection between the power supply and the direct-current to direct-current module is cut off, and the alternating current is selected to directly power the alternating current electrical equipment.

[0021] In an optional embodiment of the present application, the AC / DC selection module comprises a relay;

[0022] The coil of the relay is connected between the live wire and the zero wire between the AC input port and the AC power plug hole;

[0023] The switch of the relay is in a normally closed contact conduction state, and the normally closed contact of the relay is connected between the power supply and the DC / DC module. To achieve the above object and other related objects, the present application provides a recreational vehicle, comprising:

[0024] A vehicle body;

[0025] The power system of any one of the above.

[0026] The power system of the present application overcomes the technical bias. When the power supply is used to power the AC electrical equipment with a DC conversion power supply module or a heating module, it is not necessary to first use an inverter module to convert the DC power of the power supply into a power frequency AC power to power the AC electrical equipment with a DC conversion power supply module or a heating module. Instead, a DC / DC module is used to replace the existing inverter module to convert the DC power of the power supply into a peak DC power equivalent to the power frequency AC power to directly power the AC electrical equipment with a switching power supply module or a variable frequency power supply module. Thus, the same power DC / DC module has lower circuit complexity, higher conversion efficiency and reliability, smaller size and weight, and lower cost than the inverter module. The cost, size and weight of the entire power system are reduced, and the electrical energy conversion efficiency and reliability are improved. Moreover, the AC electrical equipment has more options and is cheaper than the customized DC electrical equipment, which further reduces the cost of the entire power system. The more AC electrical equipment the power system has, the more the cost is reduced.

[0027] When used in a recreational vehicle, the power system of the present application can also take advantage of the characteristics of the above power system to reduce the cost of the entire recreational vehicle, improve the space utilization, electrical energy utilization and reliability of the recreational vehicle, and make the recreational vehicle more competitive. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A schematic diagram of a conventional power system applied to a recreational vehicle is shown.

[0029] Figure 2 A schematic diagram of the power system of the present application applied to a recreational vehicle in a specific embodiment is shown.

[0030] Figure 3 A schematic diagram of the power system of the present application applied to a recreational vehicle in another specific embodiment is shown.

[0031] Figure 4A schematic diagram of the electrical system of the present application for a motorhome is shown in yet another specific embodiment. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0033] In existing RVs, when using a power source to supply AC electrical equipment, the following methods are employed: Figure 1 The power system shown includes an on-board battery (power source 10), an inverter module 20, and AC power devices 30. When supplying power, the inverter module 20 first converts the DC power output from the power source 10 into 220V or 110V AC power to supply the AC power devices 30. The AC power devices 30 refer to AC power devices equipped with a switching power supply module or a variable frequency power supply module. For example, the AC power devices 30 may be air conditioners, refrigerators, televisions, washing machines, induction cookers, hair dryers, fans, etc., all equipped with switching power supply modules or variable frequency power supply modules.

[0034] Now the common market has a direct current conversion power module or heating module AC power equipment 30, there are rectifiers and power modules (DC conversion power module or heating module) inside, which can include frequency conversion power module, inverter power module or switching power module. For example, an air conditioner, which can be a direct current frequency conversion air conditioner or an alternating current frequency conversion air conditioner. When the alternating current frequency conversion air conditioner is working, the internal rectifier module is used to convert the power frequency alternating current into direct current with a peak voltage roughly equal to the power frequency alternating current, and is sent to the frequency conversion power module. The frequency conversion power module is controlled by the driving signal of the microprocessor, and the output frequency of the alternating power source can be adjusted, so that the speed of the compressor (alternating current motor) changes with the change of the alternating power source, thereby changing the displacement of the compressor and adjusting the refrigerating capacity or heating capacity. The direct current frequency conversion air conditioner is first converted into direct current with a peak voltage roughly equal to the power frequency alternating current by using the internal rectifier module, and is sent to the switching power module. The switching power module is controlled by the driving signal of the microprocessor, so as to output direct current with variable voltage (without inverter link), and the compressor (brushless direct current motor) operates at different speeds under different voltages. As can be seen, whether it is a direct current frequency conversion air conditioner or an alternating current frequency conversion air conditioner, the power supply 10 output by the inverter module 20 is converted into power frequency alternating current to supply power. As an example, the output voltage of the power supply 10 is 12V, 24V or 48V.

[0035] The inventor found that when using the power supply 10 to supply power to the direct current frequency conversion air conditioner or the alternating current frequency conversion air conditioner, the direct current to direct current module 40 can be directly used instead of the inverter module 20, and the 12V, 24V or 48V direct current output by the power supply 10 can be directly converted into direct current with a peak voltage roughly equal to the power frequency alternating current to directly supply power to the direct current frequency conversion air conditioner or the alternating current frequency conversion air conditioner. Since the direct current is still a direct current with a voltage value basically unchanged after passing through the rectifier module, the direct current frequency conversion air conditioner or the alternating current frequency conversion air conditioner can still work normally without changing the existing internal circuit.

[0036] Figure 2 The application of the power supply system of the motor home is shown in the schematic diagram, and the power supply system is arranged on the vehicle body 100 of the motor home.

[0037] As Figure 2As shown, the power system includes an AC powered device 30, a power supply 10, and a DC-DC module 40. The power supply 10 is a vehicle-mounted battery, the AC powered device 30 is an AC powered device 30 with a switching power supply module or a variable frequency power supply module, the peak voltage of the power frequency AC defined for the AC powered device 30 is a preset voltage value, the input end of the DC-DC module 40 is connected to the output end of the power supply 10, the output end of the DC-DC module 40 is connected to the AC input port of the AC powered device 30, and the DC-DC module 40 is used to convert the first DC power input by the power supply 10 into second DC power to directly power the AC powered device 30. The voltage value of the second DC power is substantially consistent with the preset voltage value. Here, substantially consistent means that the voltage value of the second DC power is between the preset voltage value*(1-15%) and the preset voltage value*(1+15%). It should be noted that in other embodiments, the power supply 10 can also be replaced by a rectifier module, which can directly rectify the input AC power into DC power as the first DC power.

[0038] Specifically, the output end of the DC-DC module 40 includes a positive output end and a negative output end, the AC input port (i.e., the power supply port) of the AC powered device 30 includes a live input port and a neutral input port, the positive output end of the DC-DC module 40 is connected to one of the live input port and the neutral input port of the AC powered device 30, and the negative output end of the DC-DC module 40 is connected to the other of the live input port and the neutral input port of the AC powered device 30, to achieve the purpose of powering the AC powered device 30.

[0039] The present application uses the DC-DC module 40 to convert the first DC power of the power supply 10 into second DC power with a peak voltage substantially consistent with the peak voltage of the power frequency AC defined for the AC powered device 30, to directly power the AC powered device 30 with a switching power supply module or a variable frequency power supply module, thereby saving the inverter link and overcoming technical bias. Moreover, the same power DC-DC module 40 has lower circuit complexity, higher conversion efficiency and reliability, smaller size and weight, and lower cost than the inverter module 20, thereby reducing the cost, size, and weight of the entire power system, and improving the power conversion efficiency and reliability. At the same time, the AC powered device 30 has more market selection and lower price than the customized DC powered device, thereby further reducing the cost of the entire power system. Moreover, the more AC powered devices 30 used in the power system, the more the cost is reduced. At the same time, the house car using the power system of the present application can reduce the cost of the entire house car, improve the space utilization, power utilization, and reliability of the house car, and make the house car more competitive.

[0040] The power frequency alternating current can be 50Hz, 60Hz power frequency alternating current; the power frequency alternating current is 110V, 220V, 380V and various common power frequency alternating current.

[0041] In an optional embodiment, when the power frequency alternating current adapted to the alternating current electrical equipment 30 is 220V, the peak voltage is about 311V, that is, the preset voltage value is about 311V or so, for example, between 305V-315V.

[0042] When another optional embodiment, when the power frequency alternating current adapted to the alternating current electrical equipment 30 is 110V, the peak voltage is about 155V, that is, the preset voltage value is about 155V or so, for example, between 150V-160V.

[0043] When another optional embodiment, when the power frequency alternating current adapted to the alternating current electrical equipment 30 is 380V, the peak voltage is about 536V, for example, between 530V-540V. As Figure 2 As shown, in this embodiment, the alternating current electrical equipment 30 includes a plurality of, for example, the alternating current electrical equipment 1, the alternating current electrical equipment 2, …, the alternating current electrical equipment n, these alternating current electrical equipment 30 refers to the injection of air conditioner, refrigerator, television, washing machine, induction cooker, hair dryer, fan and other alternating current electrical equipment 30 with switching power supply module or frequency conversion power module, and the power is large, the alternating current electrical equipment 30 can be alternating current frequency conversion equipment or direct current frequency conversion equipment, details are described above, here not to make redundant.

[0044] It should be noted that, based on cost considerations, the alternating current electrical equipment 30, for example, can be all or most of the alternating current frequency conversion equipment, for example, alternating current frequency conversion air conditioner, alternating current frequency conversion washing machine, alternating current frequency conversion refrigerator, induction cooker, television, frequency conversion hair dryer, frequency conversion fan, alternating current heater and other alternating current frequency conversion equipment.

[0045] In this embodiment, since it is necessary to simultaneously power a plurality of alternating current electrical equipment 30, the DC-DC module 40 needs to use a high-power DC-DC power module, as an example, the power of the DC-DC module 40 is between 1KW-100KW, for example, 1KW, 5KW, 10KW, 15KW, 20KW, 25KW, 30KW, 35KW, 40KW, 45KW, 50KW, 60KW, 170KW, 80KW, 90KW, 100KW.

[0046] In the embodiment, the power supply 10 can be charged by solar panels as a part of the power system, which can be installed on the RV as a supplemental power source in addition to the AC charging.

[0047] In an alternative embodiment, in order to charge small power AC electrical equipment 30 such as shavers, cell phones, etc., the power system can further include a small power inverter, the input of which is connected to the power supply 10, and the output of which is connected to the AC outlet; wherein the power of the small power inverter is between 10W-100W.

[0048] As shown in Figure 3 In an alternative embodiment, in order to use AC electrical equipment 30 in the power system, the AC electrical equipment 30 can be powered by external AC power or the power supply 10, and the priority of the external AC power is higher, the power system further includes an AC power supply plug-in hole 50 and an AC / DC selection module; the AC input port of the AC electrical equipment 30 is connected to the AC power supply plug-in hole 50, and the AC power supply plug-in hole 50 is used for external AC power; when the AC power supply plug-in hole 50 is connected to the AC power supply, the circuit path between the power supply 10 and the DC / DC module 40 is cut off, and the external AC power is selected to directly power the AC electrical equipment 30.

[0049] As shown in Figure 3 In a specific embodiment, the AC / DC selection module includes a relay 60, the coil 61 of which is connected between the live wire and the zero wire between the AC input port and the AC power supply plug-in hole 50; the switch of the relay 60 is in the normally closed contact conduction state, and the normally closed contact of the relay 60 is connected between the power supply 10 and the DC / DC module 40. Thus, when no external AC power is connected, the circuit path between the power supply 10 and the DC / DC module 40 is connected through the normally closed contact of the relay 60, so that the DC / DC module 40 can convert the first DC input from the power supply 10 into the second DC to directly power the AC electrical equipment 30; when the AC power supply plug-in hole 50 is connected to the AC power supply, the coil 61 of the relay 60 is energized, driving the normally closed contact NC to act on the normally open contact NO, and the switch K is switched to cut off the power supply line from the power supply 10 to the DC / DC module 40 through the normally closed contact NC, and the external AC power supplies the AC electrical equipment 30. Of course, similar functions can also be achieved by controlling the communication state of the line between the AC input port of the AC electrical equipment 30 and the AC power supply plug-in hole 50 and the communication state of the line between the power supply 10 and the DC / DC module 40 through different switching elements respectively.

[0050] like Figure 4 As shown, in another specific embodiment, the normally closed contact of the relay 60 can also be connected between the DC-to-DC module 40 and the AC input port of the AC power device 30. Thus, when no external AC power is connected, since the circuit between the DC-to-DC module 40 and the AC input port of the AC power device 30 is connected through the normally closed contact of the relay 60, the DC-to-DC module 40 can convert the first DC power input from the power supply 10 into the second DC power to directly power the AC power device 30. When AC power is connected to the AC power supply plug 50, the coil 61 of the relay 60 is energized, causing the normally closed contact NC to move to the normally open contact NO, the switch K switches positions, and the line from the DC-to-DC module 40 to the AC power device 30 through the normally closed contact NC is cut off, and the external AC power supplies the AC power device 30. Of course, similar functions can also be achieved by controlling the connection status of the line between the AC input port of the AC power supply device 30 and the AC power supply socket 50, as well as the connection status of the line between the DC to DC module 40 and the AC power supply device 30, through different switching elements.

[0051] It should be noted that the power system of this application can be applied not only to RVs, but also to other scenarios that use power sources or to new energy vehicles that use power batteries (equivalent to power sources).

[0052] like Figure 3 and 4 As shown, in an optional embodiment, in order to replenish the power supply 10, which serves as the vehicle battery, the power system can also be equipped with a rectifier module. The rectifier module rectifies the external AC power to replenish the vehicle battery. It should be noted that the vehicle battery can also be replenished through an external solar panel or an engine.

[0053] It should be noted that, in one optional embodiment, in Figure 3 and Figure 4 Alternatively, the rectifier module can be directly used as a power source. The output terminal of the rectifier module can be directly connected to the input terminal of the DC-to-DC module 40, and the output of the rectifier module can be used as the first DC input to the input terminal of the DC-to-DC module 40.

[0054] In summary, the power system of the present application overcomes the technical prejudice, when the power supply 10 is used to supply power to the AC electrical equipment 30 with switching power supply module or frequency conversion power supply module, the DC power of the power supply 10 does not need to be converted into power frequency AC power by the inverter module 20 to supply power to the AC electrical equipment 30 with switching power supply module or frequency conversion power supply module, but the DC-to-DC module 40 is directly used to replace the existing inverter module 20, the DC power of the power supply 10 is converted into DC power with a peak value equivalent to the power frequency AC power to directly supply power to the AC electrical equipment 30 with switching power supply module or frequency conversion power supply module, so that the same power DC-to-DC module 40 has lower circuit complexity, higher conversion efficiency and reliability, smaller size and weight, and lower cost than the inverter module 20, thereby reducing the cost, size and weight of the entire power system, and improving the power conversion efficiency and reliability. Moreover, the AC electrical equipment 30 has more selection and lower price than the customized DC electrical equipment, so as to further reduce the cost of the entire power system, and the more the AC electrical equipment 30 in the power system, the more the cost is reduced.

[0055] The power system of the present application, when used in a motor home, can also take advantage of the characteristics of the above-mentioned power system to reduce the cost of the entire motor home, improve the space utilization, power utilization and reliability of the motor home, and make the motor home more competitive.

[0056] In the description herein, many specific details are provided, such as examples of components and / or methods, to provide a thorough understanding of embodiments of the present application. Those skilled in the art will recognize, however, that the application can be practiced without one or more of the specific details, or with other devices, systems, assemblies, methods, components, materials, parts, and / or the like.

[0057] It should also be understood that one or more of the elements illustrated in the drawings / figures can also be implemented in a more separated or integrated manner, or even removed in certain cases, as is useful in accordance with a particular application.

[0058] Additionally, any arrows in the drawings / figures should be considered only as exemplary, and not limiting, unless specifically noted. Furthermore, the term "or" as used herein is generally intended to mean "and / or" unless otherwise indicated. Combinations of components or steps will also be candidates for patent protection unless the context specifically indicates otherwise.

[0059] The above description of the illustrated embodiments of the application (including what is described in the abstract) is not intended to be exhaustive or to limit the application to the precise forms disclosed. While specific embodiments of, and examples for, the application are described herein for illustrative purposes, various equivalent modifications are possible within the spirit and scope of the application, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications can be made to the above described embodiments and

[0060] The systems and methods have been described generally herein as facilitating an understanding of the details of the application. Moreover, various specific details have been given for providing a thorough understanding of embodiments of the application. However, one skilled in the relevant art will recognize and appreciate that the application can be practiced without one or more of the specific details, or with other devices, systems, assemblies, methods, components, materials, parts, and the like. In other instances, well known structures, materials, and / or operations have not been shown or described in detail to avoid obscuring aspects of embodiments of the application.

[0061] Accordingly, although the application has been described herein in reference to its specific embodiments, it is not intended that the application be limited to these embodiments. Rather, it is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the application. As such, many modifications can be made in the particular environment or materials used in carrying out the application without departing from its scope and spirit. The application is not intended to be limited to the specific terms used in the following claims, and that various uses of the terms are intended to be encompassed by the application. Accordingly, the scope of the application is to be construed in accordance with the appended claims and their equivalents.

Claims

1. A power utilization system characterized by, The use electric system comprises: at least one AC electric device, the AC electric device is an AC electric device with a DC conversion power module or a heating module, a peak voltage of a power frequency AC power adapted to the AC electric device is defined as a preset voltage value; a power supply; a DC-DC module, an input end of the DC-DC module is connected with an output end of the power supply, and an output end of the DC-DC module is connected with an AC input port of the AC electric device; the DC-DC module is used for converting a first DC power input by the power supply into a second DC power to directly supply power to the AC electric device, wherein the voltage value of the second DC power is substantially consistent with the preset voltage value.

2. The power using system of claim 1, wherein, The DC conversion power module comprises a frequency conversion power module, an inverter power module or a switching power module.

3. The power using system of claim 1, wherein, The frequency of the power frequency AC power is 50Hz or 60Hz.

4. The power using system of claim 1, wherein, The power of the DC-DC module is between 1KW-100KW.

5. The power using system of claim 1, wherein, The use electric system further comprises a solar panel, the solar panel is used for charging the power supply.

6. The power using system of claim 1, wherein, The AC electric device comprises one or more of an AC frequency conversion air conditioner, an AC frequency conversion washing machine, an AC frequency conversion refrigerator, an electromagnetic oven, a television, a frequency conversion fan, a frequency conversion hair dryer and an electric heater.

7. The power using system of claim 1, wherein, The use electric system further comprises an inverter, an input end of the inverter is connected with the power supply, and an output end of the inverter is connected with an AC socket; wherein the power of the inverter is between 10W-100W.

8. The power using system of claim 1, wherein, The use electric system further comprises an AC power supply plug hole and an AC / DC selection module; the AC input port of the AC electric device is connected with the AC power supply plug hole, and the AC power supply plug hole is used for external AC power supply; when the AC power supply plug hole is connected with the AC power supply, the connection between the power supply and the DC-DC module is cut off, and the AC power is selected to directly supply power to the AC electric device.

9. The power using system of claim 8, wherein, The AC / DC selection module comprises a relay; the coil of the relay is connected between the live wire and the zero line between the AC input port and the AC power supply plug hole; the switch of the relay is in a normally closed contact conduction state, and the normally closed contact of the relay is connected between the power supply and the DC-DC module.

10. A recreational vehicle characterized by, The use electric system comprises: a vehicle body; the use electric system according to any one of claims 1-9.

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