Outdoor unit structure and light storage air conditioner

Abstract

The invention provides an outdoor unit structure and a light storage air conditioner. The outdoor unit structure comprises an outdoor unit body; the current transformation module is arranged in the outdoor unit body; the current transformation module is provided with a photovoltaic wiring terminal, an AC wiring terminal, an energy storage wiring terminal and a DC wiring terminal. The photovoltaic wiring terminal is used for connecting a photovoltaic module so as to receive electric energy transmitted by the photovoltaic module; the energy storage wiring terminal is used for connecting a battery to receive electric energy transmitted by the battery; the alternating current wiring terminal is used for receiving alternating current; and the direct-current wiring terminal is used for receiving direct current, so that the technical problem of high cost of the air conditioner in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an external unit structure and a solar-storage air conditioner. Background Art

[0002] The power supply method of traditional household air conditioners is that AC power is used to power the indoor unit, and then the indoor unit powers the outdoor unit. In the process of solar energy storage, the power supply method of household air conditioners has changed. AC power is used to power the outdoor unit, and the outdoor unit then supplies DC power to the indoor unit. Based on this change, the design of the outdoor and indoor units of household air conditioners has changed greatly, and targeted development is required according to the needs of each model. In addition, there is also the problem that some key components inside the air-conditioning system cannot be powered by DC for the time being, which results in high investment costs and a long cycle.

[0003] Therefore, the prior art needs to be further developed. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide an external unit structure and a solar storage air conditioner to solve the technical problem of high cost of solar storage air conditioners in the related art.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: an external machine structure is provided, including: an external machine body; a converter module, the converter module is arranged on the external machine body; the converter module is provided with photovoltaic terminals, AC terminals, energy storage terminals and DC terminals; the photovoltaic terminals are used to connect photovoltaic components to receive the electric energy transmitted by the photovoltaic components; the energy storage terminals are used to connect batteries to receive the electric energy transmitted by the batteries; the AC terminals are used to receive AC power; and the DC terminals are used to receive DC power.

[0006] Furthermore, the converter module includes a converter body; the external body includes a casing, the converter module is arranged in the casing, and the photovoltaic terminals, AC terminals, energy storage terminals and DC bus are located on the outer surface of the converter body; the external body has a casing, the converter body is arranged in the casing, and the photovoltaic terminals, AC terminals, energy storage terminals and DC terminals pass through the casing and are located outside the casing.

[0007] Furthermore, the converter module includes an AC circuit, an AC / DC converter is provided on the AC circuit, and the AC / DC converter is connected to the AC wiring terminal to convert the received AC power into DC power, or convert the DC power into AC power for output.

[0008] Furthermore, the inverter module includes a photovoltaic circuit, a first DC / DC converter is provided on the photovoltaic circuit, and the first DC / DC converter is connected to the photovoltaic terminal.

[0009] Furthermore, the converter module includes an energy storage circuit, a second DC / DC converter is provided on the energy storage circuit, and the second DC / DC converter is connected to the photovoltaic terminal.

[0010] Furthermore, the external machine structure includes a first DC circuit and a second DC circuit; the DC terminals include a first DC terminal arranged on the first DC circuit and a second DC terminal arranged on the second DC circuit; the first DC terminal and the second DC terminal are respectively used to receive DC power of different voltages.

[0011] Furthermore, the external machine structure includes: a third DC / DC converter, the third DC / DC converter is arranged on the first DC circuit, and the third DC / DC converter is connected to the first DC wiring terminal.

[0012] Furthermore, the converter module includes: a knob switch, and the knob switch is used to control the connection and closing of the photovoltaic terminal, the AC terminal, the energy storage terminal and the DC terminal.

[0013] An air conditioner comprises an external unit structure, wherein the external unit structure is the external unit structure mentioned above.

[0014] Furthermore, the air conditioner includes: an internal unit structure, and the internal unit structure is connected to a DC wiring terminal or an AC wiring terminal.

[0015] Furthermore, the air conditioner includes: a photovoltaic component, which is used for photovoltaic power generation and is connected to the energy storage terminal; and a battery module, which is used for storing electrical energy and is connected to the energy storage terminal.

[0016] Beneficial effects:

[0017] The external unit structure of the present invention includes: an external unit body; a converter module, which is arranged inside the external unit body; the converter module is provided with photovoltaic terminals, AC terminals, energy storage terminals and DC terminals; the photovoltaic terminals are used to connect photovoltaic modules to receive electric energy transmitted by the photovoltaic modules; the energy storage terminals are used to connect batteries to receive electric energy transmitted by the batteries; the AC terminals are used to receive AC power; and the DC terminals are used to receive DC power, which solves the technical problem of high cost of air conditioners in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an external unit structure adopted in an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of a converter module of an internal machine structure adopted in an embodiment of the present invention;

[0020] Figure 3 1 is a schematic diagram of an embodiment of the structure of an internal unit of an air conditioner used in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of another embodiment of the internal unit structure of the air conditioner adopted in the embodiment of the present invention;

[0022] Figure 5 is a circuit structure diagram of a converter module of an internal machine structure provided by an embodiment of the present invention;

[0023] Figure 6 1 is a simplified structural diagram of an air conditioner provided in an embodiment of the present invention.

[0024] The above drawings include the following reference numerals:

[0025] 1. External machine body; 11. Casing; 2. Converter module; 21. Photovoltaic terminal; 22. AC terminal; 23. Energy storage terminal; 24. DC terminal; 25. Photovoltaic module; 26. Knob switch; 201. Converter body; 3. AC circuit; 31. AC / DC converter; 4. Photovoltaic circuit; 41. First DC / DC converter; 5. Energy storage circuit; 51. Second DC / DC converter; 6. First DC circuit; 61. Third DC / DC converter; 7. Second DC circuit;

[0026] 10. Internal unit structure; 30. Battery module; 40. External unit structure. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] See also Figures 1 to 6According to an embodiment of the present invention, an external unit structure is provided, including: an external unit body 1; an inverter module 2, the inverter module 2 is arranged inside the external unit body 1; the inverter module 2 is provided with a photovoltaic terminal 21, an AC terminal 22, an energy storage terminal 23 and a DC terminal 24; the photovoltaic terminal 21 is used to connect the photovoltaic component 25 to receive the electric energy transmitted by the photovoltaic component 25; the energy storage terminal 23 is used to connect the battery to receive the electric energy transmitted by the battery; the AC terminal 22 is used to receive AC power; the DC terminal 24 is used to receive DC power, which solves the technical problem of high cost of the air conditioner in the related technology.

[0029] With the above settings, the converter module 2 is designed independently and has multiple external ports. According to the application scenario, you can choose to match it with an AC indoor unit or a DC indoor unit, or you can configure a safe power area according to the design ideas of high and low voltage DC busbars. Based on the current power supply mode of household air-conditioning systems, an extensible and universal design is made. Based on the platform and modular ideas, a variety of system combination solutions are formed, such as conventional household air-conditioning systems, photovoltaic air-conditioning systems plus AC indoor units, photovoltaic air-conditioning systems plus DC indoor units, and photovoltaic storage air-conditioning systems plus AC indoor units. According to the different application scenarios of customers, corresponding solutions are provided, which are simple and convenient and can reduce cost investment, solving the technical problem of high cost of photovoltaic storage air conditioners in the prior art.

[0030] See also Figure 2 In the external machine structure of this embodiment, see Figure 1 The inverter module 2 includes an inverter body 201; the external machine body 1 includes a casing 11, the inverter module 2 is arranged in the casing 11, and the photovoltaic terminal 21, the AC terminal 22, the energy storage terminal 23 and the DC bus are located on the outer surface of the inverter body 201; the external machine body 1 has a casing 11, the inverter body 201 is arranged in the casing 11, and the photovoltaic terminal 21, the AC terminal 22, the energy storage terminal 23 and the DC terminal 24 pass through the casing 11 and are located outside the casing 11.

[0031] With the above arrangement, the converter module 2 is embedded in the outdoor unit of the household air conditioner, and the terminals are arranged outside the outdoor unit, so as to facilitate the connection of different terminals of the outdoor unit structure with external devices.

[0032] See also Figure 5 In the external machine structure of this embodiment, the converter module includes an AC circuit 3, on which an AC / DC converter 31 is provided. The AC / DC converter 31 is connected to the AC terminal 22 to convert the received AC power into DC power, or to convert the DC power into AC power output.

[0033] By adopting the above configuration, an AC / DC converter 31 connected to the AC is provided to realize bidirectional energy flow. On the one hand, DC to AC is converted and photovoltaic power generation is fed into the grid; on the other hand, AC to DC is converted and the air conditioner draws power from the AC.

[0034] In the external machine structure of this embodiment, see Figure 5 The conversion module includes a photovoltaic circuit 4, on which a first DC / DC converter 41 is provided, and the first DC / DC converter 41 is connected to the photovoltaic terminal.

[0035] With the above arrangement, the first DC / DC converter 41 can realize photovoltaic power generation boosting and maximum power point tracking functions.

[0036] In the external machine structure of this embodiment, see Figure 5 The conversion module includes a storage circuit 5, on which a second DC / DC converter 51 is disposed, and the second DC / DC converter 51 is connected to the photovoltaic terminal.

[0037] With the above arrangement, the second DC / DC converter 51 can realize the charging and discharging control of energy storage.

[0038] Specifically, the DC / DC converter connected to photovoltaic and energy storage can be implemented with the same topology structure, which is universal.

[0039] In the external machine structure of this embodiment, see Figure 5 The external machine structure includes a first DC circuit 6 and a second DC circuit 7; the DC terminal 24 includes a first DC terminal arranged on the first DC circuit 6 and a second DC terminal arranged on the second DC circuit 7; the first DC terminal and the second DC terminal are respectively used to receive DC power of different voltages.

[0040] By adopting the above arrangement, currents of different voltages can be introduced according to different requirements.

[0041] In the external machine structure of this embodiment, see Figure 5 The external machine structure includes: a third DC / DC converter 61, the third DC / DC converter 61 is arranged on the first DC circuit 6, and the third DC / DC converter 61 is connected to the first DC terminal.

[0042] By adopting the above arrangement, it is possible to realize the conversion of high-voltage busbar to low-voltage busbar.

[0043] Specifically, the external unit structure of this embodiment further includes a DC / AC converter connected to the compressor, so that the compressor can be driven by converting direct current into alternating current.

[0044] In the external machine structure of this embodiment, see Figure 5The converter module 2 includes a rotary switch 26 , which is used to control the connection and closing of the photovoltaic terminal 21 , the AC terminal 22 , the energy storage terminal 23 and the DC terminal 24 .

[0045] The above arrangement is adopted to realize the conversion of high voltage busbar to low voltage busbar.

[0046] See also Figures 1 to 6 The air conditioner of this embodiment includes an external unit structure 40, and the external unit structure 40 is the external unit structure mentioned above.

[0047] With the above settings, we make an extensible and universal design based on the current power supply mode of household air conditioning system, and form various system solutions such as conventional household air conditioning system, photovoltaic air conditioning system with AC indoor unit, photovoltaic air conditioning system with DC indoor unit, and solar storage air conditioning system with AC indoor unit based on the platform and modularization ideas. According to different application scenarios of customers, we provide corresponding solutions, which are simple and convenient and can reduce cost investment.

[0048] In the air conditioner of this embodiment, see Figure 2 , Figure 3 The air conditioner includes: an internal unit structure 10, and the internal unit structure 10 is connected to a DC terminal 24 or an AC terminal 22.

[0049] By adopting the above arrangement, the external unit structure can be connected to the internal unit of AC or DC, thereby improving the versatility of the structure.

[0050] In the air conditioner of this embodiment, the air conditioner includes: a photovoltaic component 25, the photovoltaic component 25 is used for photovoltaic power generation, and the photovoltaic component 25 is connected to the energy storage terminal 23; a battery module 30, the battery module 30 is used to store electrical energy, and the battery module 30 is connected to the energy storage terminal 23.

[0051] Specifically, see Figure 5 The working process of the air conditioner of this embodiment is as follows:

[0052] When AC power is connected normally:

[0053] If there is energy storage, the high-voltage DC bus will be controlled by the energy storage. When the photovoltaic power generation is sufficient, the power generation will be used to power the air-conditioning compressor first. If there is excess power, it can be used to charge the energy storage or fed into the grid. When the photovoltaic power generation is insufficient or non-existent, the air-conditioning compressor can be powered by the energy storage or by the AC grid.

[0054] If there is no energy storage, the high-voltage DC bus is stabilized by connecting to the DC / AC of the AC power. When the photovoltaic power generation is sufficient, the photovoltaic power generation will give priority to powering the air-conditioning compressor, and the excess power will be fed into the grid; when the photovoltaic power generation is insufficient or non-existent, the grid will power the air-conditioning compressor.

[0055] When the AC power is abnormal:

[0056] If there is energy storage, the energy storage will control and stabilize the DC bus. When the photovoltaic power generation is sufficient, the photovoltaic power generation will give priority to powering the air conditioning compressor, and the excess power will be used to charge the energy storage; when the photovoltaic power generation is insufficient or there is no photovoltaic power generation, the energy storage will power the air conditioning compressor;

[0057] If there is no energy storage, the PV will be used to stabilize the DC bus. When the PV power generation is sufficient, the PV will be used to operate the air conditioning compressor, and when there is surplus PV power, the power will be limited. When the PV power generation is insufficient, the operating frequency of the air conditioning compressor will be adjusted to achieve the same amount of power used by the air conditioning as the PV power generation.

[0058] Based on the existing problems, on the one hand, in order to realize the rapid promotion and application of photovoltaic household air conditioners; on the other hand, in order to improve versatility, this proposal proposes a set of system solutions suitable for multiple application scenarios, which can be designed to be scalable and universal based on the current power supply mode of household air conditioning systems. Based on the platform and modular ideas, it forms a variety of system solutions such as conventional household air conditioning systems, photovoltaic air conditioning systems with AC indoor units, photovoltaic air conditioning systems with DC indoor units, and solar storage air conditioning systems with AC indoor units. According to the different application scenarios of customers, corresponding solutions are provided, which is simple and convenient and can reduce cost investment.

[0059] The external unit structure of this embodiment proposes a system solution suitable for multiple application scenarios. Based on the modular design concept, the converter module is designed separately and embedded in the external unit of the household air conditioner. The converter module can be equipped with an AC interface, a photovoltaic interface, an energy storage interface, and a DC interface. The knob switch has four gears: gear 0 means no DC bus voltage output; gear 1 means high-voltage DC bus voltage output; gear 2 means low-voltage safety DC bus voltage output; gear 3 means high and low voltage DC bus voltages are output at the same time. The specific schematic diagram is as follows Figure 1 shown.

[0060] The internal principle block diagram of the converter module is as follows: Figure 4As shown, based on the modular and detachable design concept, it contains a bidirectional AC / DC converter 31 inside, with the AC end connected to the power grid and the DC end connected to the high-voltage DC bus to realize the functions of AC rectification and DC inversion; the first DC / DC converter, one end is connected to the high-voltage DC bus, and the other end can be connected to photovoltaic or energy storage. Here, the photovoltaic DC and energy storage DC are designed universally, and can also be developed specifically according to external photovoltaic or energy storage, and two independent DC converters are designed; the second DC / DC converter, one end is connected to the high-voltage DC bus, and the other end is connected to the low-voltage DC bus to realize DC voltage conversion and establish low-voltage bus voltage; the high-voltage bus interface board collects the high-voltage bus end of the converter and outputs the high-voltage bus voltage to the outside; the bus voltage output selection switch can select the output DC voltage according to the application scenario or user needs. Each converter inside the conversion module can be selected according to the application scenario.

[0061] The details are as follows.

[0062] Example 1: Conventional household air conditioning system

[0063] In this solution, the outdoor unit of the air conditioner is matched with the indoor unit of the AC air conditioner. The AC power supplies the indoor unit, and then the indoor unit supplies power to the outdoor unit. The knob switch on the outdoor unit of the household air conditioner is in the 0 position, which is compatible with the existing household air conditioner application scenarios; the first DC / DC converter and the second DC / DC converter in the converter module can be installed optionally.

[0064] Example 2: Photovoltaic air conditioning system with AC indoor unit

[0065] In this solution, the outdoor unit of the air conditioner is matched with the indoor unit of the AC air conditioner. The indoor unit is powered by AC power, and then the outdoor unit is powered by the indoor unit. The outdoor unit of the air conditioner is powered by photovoltaic power. At this time, the knob switch has various gear options. When there is no external DC load, the gear can be selected to 0, and the DC bus voltage is not output to the outside; when the external DC load needs to be connected, select gear 1, gear 2 or gear 3 according to the load power supply voltage range. The first DC / DC converter connected to the energy storage in the conversion module can be removed, and the second DC / DC converter can be selectively installed according to whether low-voltage DC output is required.

[0066] Application scenario three: photovoltaic air conditioning system with DC indoor unit

[0067] In this solution, the outdoor air conditioner is equipped with a DC indoor air conditioner. The outdoor air conditioner is powered by AC power, and then the outdoor air conditioner supplies DC power to the indoor air conditioner. The outdoor air conditioner is powered by photovoltaic power, and the knob switch position is selected as 1 or 3. When the knob switch is selected as 1, the DC bus outputs a high-voltage DC bus to supply power to the DC indoor air conditioner or high-voltage DC load; when the knob switch is selected as 3, in addition to the high-voltage DC bus output, the low-voltage safety DC bus is also output to the outside, which can supply power to the DC load with a safe power supply voltage.

[0068] In the above-mentioned application scenarios, the energy storage power supply can be connected according to user needs, thus forming a solar energy storage air-conditioning system with a variety of indoor units. The position of the knob switch can be selected according to whether the external DC load is connected and the DC load power supply voltage range.

[0069] This design idea can be embedded in the air conditioner outdoor unit under a power level inverter module platform, and then meet the diverse needs of users by matching a variety of indoor units and DC loads. The range of options is wide, and the time cost, personnel cost, and material cost of development are low.

[0070] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0071] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0072] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0073] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0074] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An external machine structure, characterized in that: include: External unit body (1); A converter module (2), the converter module (2) being arranged inside the external machine body (1); the converter module (2) being provided with a photovoltaic terminal (21), an AC terminal (22), an energy storage terminal (23) and a DC terminal (24); the photovoltaic terminal (21) being used to connect to a photovoltaic module (25) so as to receive electric energy transmitted by the photovoltaic module (25); the energy storage terminal (23) being used to connect to a battery so as to receive electric energy transmitted by the battery; the AC terminal (22) being used to receive AC power; and the DC terminal (24) being used to receive DC power.

2. The external machine structure according to claim 1, characterized in that: The converter module (2) comprises a converter body (201); the external machine body (1) comprises a casing (11), the converter module (2) is arranged in the casing (11), and the photovoltaic terminals (21), the AC terminals (22), the energy storage terminals (23) and the DC bus are located on the outer surface of the converter body (201); the external machine body (1) has a casing (11), the converter body (201) is arranged in the casing (11), and the photovoltaic terminals (21), the AC terminals (22), the energy storage terminals (23) and the DC terminals (24) pass through the casing (11) and are located outside the casing (11).

3. The external machine structure according to claim 1, characterized in that: The current conversion module comprises an AC circuit (3), an AC / DC converter (31) is provided on the AC circuit (3), and the AC / DC converter (31) is connected to the AC wiring terminal (22) to convert the received AC power into DC power, or to convert the DC power into AC power for output.

4. The external machine structure according to claim 1, characterized in that: The current conversion module comprises a photovoltaic circuit (4), on which a first DC / DC converter (41) is provided, and the first DC / DC converter (41) is connected to the photovoltaic connection terminal.

5. The external machine structure according to claim 1, characterized in that: The current conversion module comprises an energy storage circuit (5), a second DC / DC converter (51) is provided on the energy storage circuit (5), and the second DC / DC converter (51) is connected to the photovoltaic connection terminal.

6. The external machine structure according to claim 1, characterized in that: The external machine structure comprises a first DC circuit (6) and a second DC circuit (7); the DC wiring terminal (24) comprises a first DC wiring terminal arranged on the first DC circuit (6) and a second DC wiring terminal arranged on the second DC circuit (7); the first DC wiring terminal and the second DC wiring terminal are respectively used to receive DC power of different voltages.

7. The external machine structure according to claim 6, characterized in that: The external machine structure comprises: A third DC / DC converter (61), the third DC / DC converter (61) being arranged on the first DC circuit (6), the third DC / DC converter (61) being connected to the first DC wiring terminal.

8. The external machine structure according to claim 6, characterized in that: The current conversion module (2) comprises: A rotary switch (26), the rotary switch (26) being used to control the connection and disconnection of the photovoltaic connection terminal (21), the AC connection terminal (22), the energy storage connection terminal (23) and the DC connection terminal (24).

9. An air conditioner, comprising an external unit structure (40), characterized in that: The external machine structure (40) is the external machine structure according to any one of claims 1 to 8.

10. The air conditioner according to claim 9, characterized in that: The air conditioner comprises: An internal machine structure (10), wherein the internal machine structure (10) is connected to a DC connection terminal (24) or an AC connection terminal (22).

11. The air conditioner according to claim 9, characterized in that: The air conditioner comprises: A photovoltaic assembly (25), the photovoltaic assembly (25) being used for photovoltaic power generation, the photovoltaic assembly (25) being connected to the energy storage terminal (23); A battery module (30), the battery module (30) is used to store electric energy, and the battery module (30) is connected to the energy storage terminal (23).

Images