A mobile power supply for precision air conditioning component fault detection
By designing a portable power conversion circuit to convert 220V AC mains power to 26V AC power, the power mismatch problem in the testing of precision air conditioning components in computer rooms is solved, enabling fast and safe fault detection, simplifying operation and improving the convenience and safety of testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING ZHONGSHI REAL ESTATE MANAGEMENT CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-08-04
AI Technical Summary
When testing for faults in precision air conditioning components in computer rooms, the limited space and strict voltage requirements, coupled with the lack of a suitable portable 26V AC voltage source in current technology, make the testing operation inconvenient and dangerous.
Design a portable power supply including a power conversion circuit that can convert 220V AC mains power into stable 26V AC power, and equipped with overload, overcurrent and overvoltage protection to ensure that the power output is compatible with precision air conditioning components. The power supply includes input terminals, output terminals, a transformer module, a circuit protection module and a switch module.
It enables rapid and safe power supply to precision air conditioning components at the testing site, simplifies operation, avoids secondary failures, and improves the convenience and safety of testing.
Smart Images
Figure CN224596373U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mobile power technology, and in particular to a portable power supply for detecting faults in precision air conditioning components. Background Technology
[0002] Precision air conditioners for computer rooms are specialized air conditioners designed for modern electronic equipment rooms. Their operating precision and reliability are significantly higher than ordinary air conditioners. Precision air conditioners for computer rooms have constant temperature and humidity functions, controlling the temperature difference within ±1℃, thereby greatly improving the lifespan and reliability of electronic equipment within the room. Currently, precision air conditioners for computer rooms have a stable 26V AC voltage source, capable of powering components such as control boards, humidification controllers, humidification inlet solenoid valves, drain solenoid valves, or CW valve actuators. These components are generally installed inside the equipment chassis, in a confined space. When these components malfunction and require testing, the limited space and lack of on-site testing conditions restrict the use of repair tools, increasing the risk of accidental contact with other electronic components and causing damage.
[0003] A more reasonable approach is to disassemble the faulty module and take it to a suitable testing facility for further fault detection. However, the aforementioned components have strict requirements for power supply voltage. During testing, a compatible 26V AC voltage and overload / overcurrent protection devices must be used to prevent damage to components and secondary faults caused by incompatible voltage. Currently, suitable portable 26V AC voltage sources specifically for powering the precision air conditioning components under test are generally unavailable in testing facilities. This forces testing personnel to temporarily assemble and adjust the voltage source, which is prone to causing secondary faults in the air conditioning components due to operational errors. This process is inconvenient and carries certain risks. Utility Model Content
[0004] The purpose of this invention is to provide a portable power supply for fault detection of precision air conditioning components. After being connected to a 220V mains power supply, it can stably output 26V AC power, thereby enabling rapid power supply to the precision air conditioning components to be tested in locations with testing conditions.
[0005] To achieve the above objectives, this utility model provides a portable power supply for fault detection of precision air conditioning components, including a housing and a power conversion circuit disposed within the housing; the power conversion circuit includes an input terminal, an output terminal, a transformer module, a first circuit protection module, a second circuit protection module, and a switch module, wherein the first circuit protection module is connected in series in the input circuit formed by the input terminal and the input terminal of the transformer module, and the second circuit protection module is connected in series in the output circuit formed by the output terminal and the output terminal of the transformer module;
[0006] The switching module is configured to control the input terminal of the transformer module to switch between a conducting state and a disconnecting state.
[0007] The transformer module is configured to step down the 220V AC power input to the input terminal to a 26V AC power output.
[0008] Furthermore, the switching module includes a relay and a mechanical switch. The control circuit of the relay is connected in series with the mechanical switch and then connected to the input terminal. The load circuit of the relay is connected in series between the input terminal of the transformer module and the input terminal.
[0009] Furthermore, the mechanical switch is a push-button switch, which is embedded in the surface of the housing.
[0010] Furthermore, the push-button switch includes an indicator light, which is connected to the input terminal.
[0011] Furthermore, the transformer module includes a transformer.
[0012] Furthermore, an overpressure protection module is also connected to the output circuit.
[0013] Furthermore, the overpressure protection module includes a varistor, which is connected in parallel in the output circuit.
[0014] Furthermore, the surface of the enclosure is provided with a first socket and a second socket, the first socket being connected to the input terminal and the second socket being connected to the output terminal.
[0015] Furthermore, it also includes a grounding terminal, on which a grounding wire is connected.
[0016] Furthermore, the first circuit protection module and the second circuit protection module include circuit breakers.
[0017] The beneficial effects of this utility model are reflected in:
[0018] The portable power supply provided in this application for fault detection of precision air conditioning components can stably output 26V AC power after being connected to a 220V mains power supply. This allows for the rapid supply of power to the precision air conditioning components to be tested in locations with testing conditions, simplifying the operation steps, facilitating employee work, and improving the convenience of testing and experimentation.
[0019] The portable power supply outputs AC voltage that is consistent with the operating voltage level requirements of precision air conditioning components, preventing secondary component failures due to operational errors; it also features built-in load short-circuit protection, overload protection, and automatic overvoltage protection, ensuring high safety.
[0020] This portable power supply has a simple circuit structure and is easy to maintain. It is encapsulated in a box, making it compact and easy to move and carry. Attached Figure Description
[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.
[0023] Figure 1 A schematic diagram of the structure of a portable power supply for fault detection of precision air conditioning components provided in an embodiment of this utility model;
[0024] Figure 2 A circuit diagram of a power conversion circuit provided in an embodiment of this utility model.
[0025] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation
[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0027] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0029] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] like Figure 1 As shown in the figure, this utility model provides a portable power supply for fault detection of precision air conditioning components. After being connected to a 220V mains power supply, it can stably output 26V AC power, thereby enabling rapid power supply to the precision air conditioning components to be tested in locations with testing conditions.
[0033] Specifically, the portable power supply includes a housing 1 and a power conversion circuit disposed within the housing 1. The power conversion circuit includes an input terminal 2, an output terminal 3, a grounding terminal 4, a transformer module, a first circuit protection module, a second circuit protection module, and a switch module. The first circuit protection module is connected in series in the input circuit formed by the input terminal 2 and the input terminal of the transformer module, and the second circuit protection module is connected in series in the output circuit formed by the output terminal 3 and the output terminal of the transformer module. A grounding wire is connected to the grounding terminal 4, providing reliable grounding protection to the ground wire of the 220V single-phase three-wire power supply main line. In some embodiments, the input terminal 2, output terminal 3, grounding terminal 4, transformer module, first circuit protection module, second circuit protection module, and switch module can all be fixedly disposed within the housing 1.
[0034] The switching module is configured to control the switching between the input terminal of the transformer module and the input terminal 2 in a conducting or disconnected state. The transformer module is configured to step down the 220V AC power input to the input terminal 2 to a 26V AC power output.
[0035] In this embodiment, the first circuit protection module and the second circuit protection module have overload and overcurrent protection functions, used to disconnect the corresponding circuit when an overload and / or overcurrent occurs in the input or output circuit, ensuring circuit safety. Specifically, the first circuit protection module and the second circuit protection module include a circuit breaker, model AB 140M-C2E-B25.
[0036] Specifically, the switching module includes a relay and a mechanical switch. The control circuit of the relay is connected in series with the mechanical switch and then connected to the input terminal 2. The load circuit of the relay is connected in series between the input terminal of the transformer module and the input terminal 2. The mechanical switch is a push-button switch, which is embedded in the surface of the housing 1.
[0037] For example, the relay model is Schneider PXM4AB2P7. When the push-button switch is closed, the relay's control circuit is activated, the relay's load circuit is activated, thereby activating the input circuit, and the entire portable power supply can start working after being connected to mains power.
[0038] Furthermore, the push-button switch also includes an indicator light, which is connected to the input terminal 2 and illuminates when connected to AC power. The push-button switch with indicator light has a diameter of 16mm and is a waterproof, self-locking circular push-button switch with an LED power indicator, providing power switching and power indication functions.
[0039] In some embodiments, the transformer module includes a transformer. The transformer is a BLOCK B 9711110 model and provides a step-down function.
[0040] In this embodiment, an overvoltage protection module is also connected to the output circuit. Specifically, the overvoltage protection module includes a varistor connected in parallel in the output circuit. The varistor provides overvoltage protection through the transformer output voltage, and the varistor model is EPCOS S10 K30.
[0041] Furthermore, a first socket 5 and a second socket 6 are embedded in the surface of the housing 1. The first socket 5 is connected to the input terminal 2, and the second socket 6 is connected to the output terminal 3. For example, the first socket 5 provides AC 220V input by connecting to a three-prong figure-eight quick-connect power cord plug 7. The second socket 6 provides AC 26V output by connecting to a two-prong figure-eight quick-connect power cord plug 8. The inclusion of the first socket 5 and the second socket 6 facilitates both AC mains connection and AC step-down power output connection.
[0042] Please see Figure 2 As shown, Figure 2 An exemplary circuit diagram of a power conversion circuit is shown. This power conversion circuit includes an input terminal 2, an output terminal 3, a ground terminal 4, a transformer T, a first circuit breaker QF1, a second circuit breaker QF2, a relay KC, a varistor RV, a push-button switch SB, and an LED power indicator. The primary winding of the transformer T is connected in series with the load circuit of the relay KC and the first circuit breaker QF1 via a wire k, and then connected to the corresponding input terminal 2. The corresponding input terminal is connected to the live wire and neutral wire of a 220V single-phase three-wire power supply, thus forming an input circuit. The secondary winding of the transformer T is connected in series with the second circuit breaker QF2 via a wire k, and then connected to the corresponding output terminal 3, forming an output circuit. The transformer T steps down the 220V AC input to the input terminal 2 to a 26V AC output.
[0043] The control circuit of relay KC is connected in series with the push-button switch SB and then connected to the input terminal 2. When the input terminal 2 is connected to mains power, the LED power indicator light is turned on. Pressing the push-button switch SB energizes the control circuit of relay KC, thereby triggering the load circuit of relay KC to conduct, and the entire portable power supply can then start working. The varistor RV is connected in parallel in the output circuit to provide overvoltage protection for the transformer output terminal.
[0044] In summary, the portable power supply for fault detection of precision air conditioning components provided in this application can stably output 26V AC power after being connected to a 220V mains power supply. This enables the rapid supply of power to the precision air conditioning components to be tested in locations with testing conditions, simplifying the operation steps, facilitating employee work, and improving the convenience of testing.
[0045] The portable power supply outputs AC voltage that is consistent with the operating voltage level requirements of precision air conditioning components, preventing secondary component failures due to operational errors; it also features built-in load short-circuit protection, overload protection, and automatic overvoltage protection, ensuring high safety.
[0046] The portable power supply has a simple circuit structure and is easy to maintain. It is encapsulated within a housing 1, making it compact and easy to move and carry.
[0047] Finally, it should be noted that the technical features of the technical solution of this application can be combined arbitrarily. In order to simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.
[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A portable power supply for fault detection of precision air conditioning components, characterized in that, The device includes a housing and a power conversion circuit disposed within the housing. The power conversion circuit includes an input terminal, an output terminal, a transformer module, a first circuit protection module, a second circuit protection module, and a switch module. The first circuit protection module is connected in series in the input circuit formed by the input terminal and the input terminal of the transformer module, and the second circuit protection module is connected in series in the output circuit formed by the output terminal and the output terminal of the transformer module. The switching module is configured to control the input terminal of the transformer module to switch between a conducting state and a disconnecting state. The transformer module is configured to step down the 220V AC power input to the input terminal to a 26V AC power output.
2. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, The switching module includes a relay and a mechanical switch. The control circuit of the relay is connected in series with the mechanical switch and then connected to the input terminal. The load circuit of the relay is connected in series between the input terminal of the transformer module and the input terminal.
3. A portable power supply for fault detection of precision air conditioning components as described in claim 2, characterized in that, The mechanical switch is a push-button switch, which is embedded in the surface of the housing.
4. A portable power supply for fault detection of precision air conditioning components as described in claim 3, characterized in that, The push-button switch includes an indicator light, which is connected to the input terminal.
5. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, The transformer module includes a transformer.
6. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, An overpressure protection module is also connected to the output circuit.
7. A portable power supply for fault detection of precision air conditioning components as described in claim 6, characterized in that, The overpressure protection module includes a varistor, which is connected in parallel in the output circuit.
8. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, The surface of the enclosure is provided with a first socket and a second socket. The first socket is connected to the input terminal, and the second socket is connected to the output terminal.
9. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, It also includes a grounding terminal, on which a grounding wire is connected.
10. A portable power supply for fault detection of precision air conditioning components as described in claim 1, characterized in that, The first circuit protection module and the second circuit protection module include circuit breakers.