A thin-wall air conditioner power supply system and thin-wall air conditioner unit
Patent Information
- Application Number
- CN202522006289.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-17
AI Technical Summary
转换效率低：交流三相380V供电，变频器驱动压缩机需经过AC/DC整流（效率85-90%）+ DC/AC逆变（效率90-95%），综合效率仅78-85%；风机采用AC-DC开关电源降压至直流48V供电，转换环节多，效率损失约15%-20%
薄墙空调供电系统包括：DC-DC开关电源、第一风机转接板和多个第一直流风机；所述DC-DC开关电源的输入端用于与高压直流电源的母线电连接；所述DC-DC开关电源的输出端和所述第一风机转接板的输入端电连接；所述第一风机转接板的输出端和所述多个第一直流风机电连接。本实用新型实施例通过高压直流电源供电，不存在无功功率、谐波电流，直流输电无集肤效应、电容电流和电感损耗，降低了能耗、线损和成本；风机采用DC-DC开关电源，转换环节少，提高了转换效率；DC-DC开关电源设计较简单；因此能够降低薄墙空调供电系统的能耗、线损和成本、提高转换效率、结构更简单。
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Figure CN224669457U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air conditioning unit technology, and in particular to a thin-walled air conditioning power supply system and a thin-walled air conditioning unit. Background Technology
[0002] Most existing thin-wall air conditioners use a three-phase 380V AC power supply, which drives the fan and compressor after multiple conversions. For example, the compressor is driven by an AC inverter, requiring two conversions: AC to DC and back to AC. The fan uses an AC-DC switching power supply to step down the voltage to 48V DC, resulting in multiple conversion steps.
[0003] In the process of realizing this invention, the inventors discovered at least the following technical problems in the prior art: Low conversion efficiency: AC three-phase 380V power supply, the inverter drives the compressor, which needs to go through AC / DC rectification (efficiency 85-90%) + DC / AC inverter (efficiency 90-95%), with a comprehensive efficiency of only 78-85%; the fan uses AC-DC switching power supply to step down to DC 48V power supply, with many conversion stages, resulting in an efficiency loss of about 15%-20%. Utility Model Content
[0004] In view of this, the present invention provides a thin-wall air conditioner power supply system and a thin-wall air conditioner unit, which can improve conversion efficiency.
[0005] In a first aspect, this utility model provides a thin-wall air conditioner power supply system, including: a DC-DC switching power supply, a first fan adapter board, and a plurality of first DC fans; The input terminal of the DC-DC switching power supply is used for electrical connection to the bus of the high-voltage DC power supply. The output terminal of the DC-DC switching power supply is electrically connected to the input terminal of the first fan adapter board; The output end of the first fan adapter plate is electrically connected to the plurality of first DC fans.
[0006] Optionally, the system further includes: a frequency converter and a compressor; The input terminal of the frequency converter is used for electrical connection with the bus of the high-voltage DC power supply; The output terminal of the frequency converter is electrically connected to the compressor.
[0007] Optionally, the system further includes: a first circuit breaker; one end of the first circuit breaker is electrically connected to the bus of the high-voltage DC power supply, and the other end is electrically connected to the input terminals of the frequency converter and the DC-DC switching power supply.
[0008] Optionally, the system further includes: a second circuit breaker; one end of the second circuit breaker is electrically connected to the other end of the first circuit breaker, and the other end is electrically connected to the input terminal of the frequency converter.
[0009] Optionally, the system further includes: a third circuit breaker; one end of the third circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the first fan adapter plate.
[0010] Optionally, the system further includes: a second fan adapter plate and a plurality of second DC fans; The output terminal of the DC-DC switching power supply is also electrically connected to the input terminal of the second fan adapter board; The output end of the second fan adapter plate is electrically connected to the plurality of second DC fans.
[0011] Optionally, the system further includes: a fourth circuit breaker; one end of the fourth circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the second fan adapter plate.
[0012] Optionally, the system further includes: a third fan adapter board and multiple third DC fans; The output terminal of the DC-DC switching power supply is also electrically connected to the input terminal of the third fan adapter board; The output end of the third fan adapter board is electrically connected to the plurality of third DC fans.
[0013] Optionally, the system further includes: a fifth circuit breaker; one end of the fifth circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the third fan adapter board.
[0014] On the other hand, this utility model embodiment provides a thin-walled air conditioning unit, including the aforementioned thin-walled air conditioning power supply system.
[0015] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: The thin-wall air conditioner power supply system includes: a DC-DC switching power supply, a first fan adapter board, and multiple first DC fans; the input terminal of the DC-DC switching power supply is electrically connected to the bus of a high-voltage DC power supply; the output terminal of the DC-DC switching power supply is electrically connected to the input terminal of the first fan adapter board; the output terminal of the first fan adapter board is electrically connected to the multiple first DC fans. This embodiment of the invention uses a high-voltage DC power supply, eliminating reactive power and harmonic current. DC transmission avoids skin effect, capacitive current, and inductor losses, thus reducing energy consumption, line loss, and cost. The fans utilize a DC-DC switching power supply, reducing conversion stages and improving conversion efficiency. The DC-DC switching power supply design is relatively simple. Therefore, it can reduce the energy consumption, line loss, and cost of the thin-wall air conditioner power supply system, improve conversion efficiency, and simplify the structure. Attached Figure Description
[0016] Figure 1 A schematic diagram of a thin-walled air conditioner power supply system provided for an embodiment of this utility model; Figure 2 A schematic diagram of another thin-walled air conditioner power supply system provided for an embodiment of this utility model; Figure 3 A schematic diagram of another thin-walled air conditioner power supply system provided for an embodiment of this utility model; Figure 4 A schematic diagram of another thin-walled air conditioner power supply system provided for an embodiment of this utility model; Figure 5 This is a structural schematic diagram of a thin-walled air conditioning unit provided for an embodiment of the present utility model. Detailed Implementation
[0017] To better understand the technical solution of this utility model, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0018] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0019] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0020] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0021] Figure 1 A schematic diagram of a thin-walled air conditioner power supply system provided for an embodiment of this utility model is shown below. Figure 1 As shown, the thin-wall air conditioner power supply system includes: a DC-DC switching power supply 1, a first fan adapter board 2, and multiple first DC fans 3; the input terminal of the DC-DC switching power supply 1 is used for electrical connection with the bus of the high-voltage DC power supply; the output terminal of the DC-DC switching power supply 1 is electrically connected to the input terminal of the first fan adapter board 2; the output terminal of the first fan adapter board 2 is electrically connected to the multiple first DC fans 3.
[0022] For example, the high-voltage DC power supply is a 540V DC power supply.
[0023] For example, DC-DC switching power supply 1 is a 540VDC to 48VDC switching power supply with an output of 48V / 100A.
[0024] For example, all of the first DC fans 3 are 48V DC fans.
[0025] For example, the first fan adapter board 2 supports the connection of 8 DC fans for power supply and control of the fans.
[0026] For example, such as Figure 1 As shown, the multiple first DC fans 3 can include 6 DC fans, namely fans 1 to 6.
[0027] For example, the power of a single DC fan is 200W.
[0028] The thin-wall air conditioner power supply system provided in this embodiment of the utility model has at least the following beneficial effects: 1) Powered by a high-voltage DC power supply, the DC system has no reactive power and the power factor is approximately 1, eliminating the need for power factor correction equipment and reducing energy consumption; 2) DC power transmission has no skin effect, capacitive current and inductive loss. Under the same power, the line resistance loss is reduced by about 20%-30% compared with the AC system. Compared with three-phase AC 380V, under the same power, the cross-sectional area of the DC 540V bus can be reduced by more than 30% when transmitting large current, so the line loss is lower. 3) DC systems do not have frequency synchronization issues, avoid harmonic interference from AC power grids, and do not require the addition of reactors, filters, and other components, thus reducing costs; 4) The fan uses a DC-DC switching power supply 1 to step down the DC 540V to DC 48V, reducing the number of conversion stages and improving conversion efficiency; 5) The DC-DC switching power supply 1 has no EMI filter, rectifier bridge, high voltage filter capacitor and other modules at the front end, which makes the circuit design simpler, reduces the number of components and reduces the failure rate. 6) Photovoltaic and energy storage batteries naturally output DC power, which can be directly connected to the equipment, eliminating the need for an inverter (efficiency improvement of 5-8%), thus making them compatible with renewable energy sources.
[0029] Therefore, the thin-wall air conditioner power supply system provided by this utility model embodiment can at least reduce the energy consumption, line loss and cost of the thin-wall air conditioner power supply system, improve the conversion efficiency and simplify the structure.
[0030] Furthermore, Figure 2 This is a schematic diagram of another thin-walled air conditioner power supply system provided in an embodiment of the present utility model, compared to Figure 1 The thin-walled air conditioning power supply system shown is as follows: Figure 2 As shown, the power supply system for the thin-walled air conditioner also includes: inverter 4 and compressor 5; The input terminal of inverter 4 is used for electrical connection to the bus of high-voltage DC power supply; the output terminal of inverter 4 is electrically connected to compressor 5.
[0031] For example, inverter 4 is a compressor inverter that supports DC 540V input, has a rated power of 15kW, and is capable of converting DC 540V to AC.
[0032] For example, compressor 5 is a variable frequency compressor with a maximum power of 15kW.
[0033] The thin-wall air conditioner power supply system provided in this embodiment of the utility model also has the following beneficial effects: 1) The high-voltage DC power supply is directly connected to the DC input port 4 of the frequency converter, eliminating the AC / DC rectification stage and only requiring DC / AC inversion, which further improves the conversion efficiency; 2) The compressor frequency converter can eliminate the need for the rectifier module. Since there is no need for harmonic mitigation, harmonic mitigation devices such as reactors and active filters can be eliminated, further reducing costs and simplifying the structure.
[0034] Furthermore, Figure 3 This is a schematic diagram of another thin-walled air conditioner power supply system provided in an embodiment of the present utility model, compared to Figure 2 The thin-walled air conditioning power supply system shown is as follows: Figure 3 As shown, the thin-wall air conditioner power supply system also includes: a first circuit breaker QF1; one end of the first circuit breaker QF1 is used to be electrically connected to the bus of the high-voltage DC power supply, and the other end is electrically connected to the input terminal of the frequency converter 4 and the DC-DC switching power supply 1.
[0035] Circuit breakers are crucial protection and control devices in power systems, enabling them to safely connect, carry, and disconnect current under both normal and abnormal conditions. The core working principle of a circuit breaker is its ability to automatically cut off current when a line experiences an overload or short circuit.
[0036] Among them, the first circuit breaker QF1 is the main circuit breaker, which can automatically cut off the current when the main line experiences overload or short circuit faults, thus protecting the circuit.
[0037] For example, the first circuit breaker QF1 is a DC circuit breaker with a rated voltage greater than or equal to 540V and a rated current of 40A.
[0038] Furthermore, such as Figure 3 As shown, the thin-wall air conditioner power supply system also includes: a second circuit breaker QF2; one end of the second circuit breaker QF2 is electrically connected to the other end of the first circuit breaker QF1, and the other end is electrically connected to the input terminal of the frequency converter 4.
[0039] Among them, the second circuit breaker QF2 is a compressor circuit breaker, which can automatically cut off the current when an overload or short circuit occurs in the branch where the compressor is located, thus protecting the circuit.
[0040] For example, the second circuit breaker QF2 is a DC circuit breaker with a rated voltage greater than or equal to 540V and a rated current of 32A.
[0041] Furthermore, such as Figure 3 As shown, the thin-wall air conditioner power supply system also includes: a third circuit breaker QF3; one end of the third circuit breaker QF3 is electrically connected to the output end of the DC-DC switching power supply 1, and the other end is electrically connected to the input end of the first fan adapter plate 2.
[0042] Among them, the third circuit breaker QF3 is the first wind turbine circuit breaker, which can automatically cut off the current when overload or short circuit faults occur in the branch where multiple first wind turbines 3 are located, thus playing the role of protecting the circuit.
[0043] For example, the third circuit breaker QF3 is a DC circuit breaker with a rated voltage greater than or equal to 48V and a rated current of 32A.
[0044] Furthermore, Figure 4 This is a schematic diagram of another thin-walled air conditioner power supply system provided in an embodiment of the present utility model, compared to Figure 3 The thin-walled air conditioning power supply system shown is as follows: Figure 4 As shown, the thin-wall air conditioner power supply system also includes: a second fan adapter board 6 and multiple second DC fans 7; the output terminal of the DC-DC switching power supply 1 is also electrically connected to the input terminal of the second fan adapter board 6; the output terminal of the second fan adapter board 6 is electrically connected to the multiple second DC fans 7.
[0045] For example, all of the multiple second DC fans 7 are 48V DC fans.
[0046] For example, the second fan adapter board 6 supports the connection of 8 DC fans for power supply and control of the fans.
[0047] For example, such as Figure 4 As shown, the multiple second DC fans 7 can include 6 DC fans, namely fans 7 to 12.
[0048] The thin-wall air conditioner power supply system provided in this embodiment can support two fans, namely, the branch where multiple first fans 3 are located and the branch where multiple second DC fans 7 are located.
[0049] Furthermore, such as Figure 4 As shown, the thin-wall air conditioner power supply system also includes: a fourth circuit breaker QF4; one end of the fourth circuit breaker QF4 is electrically connected to the output end of the DC-DC switching power supply 1, and the other end is electrically connected to the input end of the second fan adapter plate 6.
[0050] Among them, the fourth circuit breaker QF4 is the second fan circuit breaker, which can automatically cut off the current when overload or short circuit faults occur in the branches where multiple second fans 7 are located, thus playing the role of protecting the circuit.
[0051] For example, the fourth circuit breaker QF4 is a DC circuit breaker with a rated voltage greater than or equal to 48V and a rated current of 32A.
[0052] Furthermore, such as Figure 4 As shown, the thin-wall air conditioner power supply system also includes: a third fan adapter board 8 and multiple third DC fans 9; the output terminal of the DC-DC switching power supply 1 is also electrically connected to the input terminal of the third fan adapter board 8; the output terminal of the third fan adapter board 8 is electrically connected to multiple third DC fans 9.
[0053] For example, all of the third DC fans 9 are 48V DC fans.
[0054] For example, the third fan adapter board 8 supports the connection of 8 DC fans for power supply and control of the fans.
[0055] For example, such as Figure 4 As shown, multiple third DC fans 9 can include 6 DC fans, namely fans 13 to 18.
[0056] The thin-wall air conditioner power supply system provided in this embodiment can support three fans, namely, multiple first fans 3 in the branch, multiple second DC fans 7 in the branch, and multiple third DC fans 9.
[0057] Similarly, the thin-wall air conditioner power supply system provided in this embodiment can support multiple fan branches, each fan branch containing multiple DC fans. For example, such as... Figure 3 As shown, when the thin-wall air conditioning power supply system includes 3 fan branches, and each fan branch includes 6 DC fans, the thin-wall air conditioning power supply system can control 18 DC fans.
[0058] Furthermore, such as Figure 4 As shown, the thin-wall air conditioner power supply system also includes: a fifth circuit breaker QF5; one end of the fifth circuit breaker QF5 is electrically connected to the output end of the DC-DC switching power supply 1, and the other end is electrically connected to the input end of the third fan adapter plate 8.
[0059] Among them, the fifth circuit breaker QF5 is the third wind turbine circuit breaker, which can automatically cut off the current when overload or short circuit faults occur in the branch where multiple third DC wind turbines 9 are located, thus playing the role of protecting the circuit.
[0060] For example, the fifth circuit breaker QF5 is a DC circuit breaker with a rated voltage greater than or equal to 48V and a rated current of 32A.
[0061] In this embodiment of the utility model, Figures 1-4 Each fan adapter plate is located near the DC fan.
[0062] In this embodiment of the invention, the high-voltage DC input is divided into a compressor branch and a fan branch. In the compressor branch, the high-voltage DC input is directly connected to the DC port of the frequency converter, and the inverter output drives the compressor. In the fan branch, the high-voltage DC input is output to 48V through a 540VDC→48VDC switching power supply, and then output in parallel to the fan adapter board to power and control multiple DC fans.
[0063] To demonstrate the beneficial effects of the thin-wall air conditioning power supply system provided in this embodiment, this embodiment was compared with a traditional solution using measured data. The comparison results are as follows: 1) Overall system efficiency: The traditional solution is 85%, while the embodiment of this utility model is 95%, representing a 10% increase in efficiency; 2) Power factor: 0.85 in the traditional scheme, and in embodiment 1 of this utility model; 3) Harmonic current: 30% in the traditional solution, no harmonics in this embodiment; 4) System complexity: Traditional solutions require the configuration of harmonic processing, EMC (Electromagnetic Compatibility) filters and other devices, while this embodiment of the invention does not require such configuration.
[0064] This utility model relates to the field of electrical design of air conditioning units and is applicable to thin-wall air conditioning power supply systems in scenarios such as data centers and high-density computer rooms. It improves energy efficiency and reliability through DC 540V high-voltage power supply and multi-voltage level coordinated control.
[0065] This utility model embodiment directly connects the high-voltage DC power bus to both the frequency converter and the DC-DC switching power supply. The frequency converter output drives the compressor, and the output of the DC-DC switching power supply drives multiple DC fans in parallel. Its advantages are that by simplifying the energy conversion path, reducing transmission losses, and enhancing system stability, it is significantly superior to the 380V AC system in terms of energy efficiency (≥7%), cost (20-30% reduction in equipment and wiring), and future compatibility (direct connection to new energy sources). It is especially suitable for high-density loads (such as data center air conditioning) and green energy scenarios.
[0066] The technical solution of the thin-wall air conditioner power supply system provided in this embodiment includes: a DC-DC switching power supply, a first fan adapter board, and multiple first DC fans; the input terminal of the DC-DC switching power supply is electrically connected to the bus of the high-voltage DC power supply; the output terminal of the DC-DC switching power supply is electrically connected to the input terminal of the first fan adapter board; the output terminal of the first fan adapter board is electrically connected to the multiple first DC fans. This embodiment uses a high-voltage DC power supply, eliminating reactive power and harmonic current. DC transmission has no skin effect, capacitive current, or inductor loss, reducing energy consumption, line loss, and cost. The fans use a DC-DC switching power supply, reducing conversion stages and improving conversion efficiency. The DC-DC switching power supply design is relatively simple. Therefore, it can reduce the energy consumption, line loss, and cost of the thin-wall air conditioner power supply system, improve conversion efficiency, and simplify the structure.
[0067] Figure 5 A structural schematic diagram of a thin-walled air conditioning unit provided for an embodiment of this utility model is shown below. Figure 5 As shown, the thin-walled air conditioning unit includes: the thin-walled air conditioning power supply system in the above system embodiment and... Figures 1-4 The thin-walled air conditioning power supply system shown is included in this diagram. Since the thin-walled air conditioning unit includes the aforementioned thin-walled air conditioning power supply system, it also has the same technical effects as the aforementioned thin-walled air conditioning power supply system.
[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A thin-walled air conditioner power supply system, characterized in that, The system includes: a DC-DC switching power supply, a first fan adapter board, and multiple first DC fans; The input terminal of the DC-DC switching power supply is used for electrical connection to the bus of the high-voltage DC power supply. The output terminal of the DC-DC switching power supply is electrically connected to the input terminal of the first fan adapter board; The output end of the first fan adapter plate is electrically connected to the plurality of first DC fans.
2. The system according to claim 1, characterized in that, The system also includes: a frequency converter and a compressor; The input terminal of the frequency converter is used for electrical connection with the bus of the high-voltage DC power supply; The output terminal of the frequency converter is electrically connected to the compressor.
3. The system according to claim 2, characterized in that, The system further includes: a first circuit breaker; one end of the first circuit breaker is electrically connected to the bus of the high-voltage DC power supply, and the other end is electrically connected to the input terminals of the frequency converter and the DC-DC switching power supply.
4. The system according to claim 3, characterized in that, The system further includes: a second circuit breaker; one end of the second circuit breaker is electrically connected to the other end of the first circuit breaker, and the other end is electrically connected to the input terminal of the frequency converter.
5. The system according to claim 1, characterized in that, The system further includes a third circuit breaker; one end of the third circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the first fan adapter plate.
6. The system according to claim 1, characterized in that, The system also includes: a second fan adapter plate and multiple second DC fans; The output terminal of the DC-DC switching power supply is also electrically connected to the input terminal of the second fan adapter board; The output end of the second fan adapter plate is electrically connected to the plurality of second DC fans.
7. The system according to claim 6, characterized in that, The system also includes: a fourth circuit breaker; one end of the fourth circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the second fan adapter plate.
8. The system according to claim 1, characterized in that, The system also includes: a third fan adapter plate and multiple third DC fans; The output terminal of the DC-DC switching power supply is also electrically connected to the input terminal of the third fan adapter board; The output end of the third fan adapter board is electrically connected to the plurality of third DC fans.
9. The system according to claim 8, characterized in that, The system also includes: a fifth circuit breaker; one end of the fifth circuit breaker is electrically connected to the output terminal of the DC-DC switching power supply, and the other end is electrically connected to the input terminal of the third fan adapter board.
10. A thin-walled air conditioning unit, characterized in that, include: The thin-wall air conditioning power supply system according to any one of claims 1 to 9.