Voltage circuit

Abstract

Voltage switching circuit (1) for supplying a predetermined output voltage (11) to a load (5), comprising • a voltage input (6) configured to receive a first input voltage (2) or a second input voltage (3), wherein the first input voltage (2) has a different voltage level than the second input voltage (3); • a voltage detection device (7) configured to determine whether the first input voltage (2) or the second input voltage (3) is received by the voltage input (6); and • a switching device (8) configured to supply the first input voltage (2) to a voltage output (12) or the second input voltage (3) to a voltage converter (9) depending on whether the first input voltage (2) or the second input voltage (3) is received by the voltage input (6) • wherein the voltage converter (9) is configured to transform the second input voltage (3) into a transformed voltage (13) and supply the transformed voltage (13) to the voltage output (12); • wherein the voltage output (12) is configured to output the first input voltage (2) as the output voltage (11) or to output the transformed voltage (13) as the output voltage (11).

Description

[0001] The present invention relates to a voltage switching circuit for supplying a predetermined output voltage to a load and a voltage switching board. The present invention further relates to an air conditioner.

[0002] Mains electricity is an alternating current (AC) power supply that supplies electrical energy to homes and businesses via a power grid. The power grid is available almost worldwide. The voltage and frequency of the electricity supplied by the grid vary from region to region. In Europe, for example, the voltage is 240 V and the frequency is 50 Hz. In North America, the voltage is 120 V and the frequency is 60 Hz.

[0003] Electrical devices connected to the power grid and used worldwide must be configured to operate at the various voltages and / or frequencies provided by the power grid. Therefore, the electrical devices must be adapted for each voltage and frequency. This increases the development effort and complexity of the electrical devices.

[0004] The object of the present invention is to provide a voltage switching circuit and a method for supplying a predetermined output voltage to a load. Another object is to provide a voltage switching panel and an air conditioning unit.

[0005] The problem is solved by a suitably configured voltage switching circuit for supplying a predetermined output voltage to a load according to claim 1. The voltage switching circuit comprises a voltage input configured to receive a first input voltage or a second input voltage, wherein the first input voltage has a different voltage level than the second input voltage, and wherein the voltage switching circuit further comprises a voltage sensing device configured to determine whether the first input voltage or the second input voltage is received by the voltage input. Preferably, the voltage sensing device comprises a voltage sensor.The voltage circuit further comprises a switching device configured to supply the first input voltage to a voltage output or to supply the second input voltage to a voltage converter, depending on whether the first input voltage or the second input voltage is present at the voltage input. The voltage converter is configured to convert the second input voltage into a transformed voltage and supply the transformed voltage to the voltage output. The voltage output is configured to output the first input voltage as an output voltage or to output the transformed voltage as an output voltage.

[0006] In other words, if, for example, the first input voltage is applied to the voltage input, the first input voltage is preferably fed directly to the voltage output, which outputs the first input voltage as the output voltage. If, on the other hand, for example, the second input voltage is received at the voltage input, the second input voltage is converted by the transformer into the transformed voltage, which is preferably fed directly to the voltage output and output as the output voltage. The voltage switching circuit can therefore supply the specified output voltage to the load, particularly independently of the input voltage applied to the voltage input. In particular, the load can be supplied with a voltage required by the load, regardless of the area in which the voltage switching circuit is used. Preferably, the load does not have to be adapted to different voltages and / or frequencies provided by the electrical grid.This allows a standardized load to be used, reducing complexity and development effort.

[0007] In one embodiment, the voltage input and / or the voltage measuring device and / or the switching device and / or the voltage converter and / or the voltage output are individual components that form the voltage circuit. Additionally or alternatively, some components can be combined as a single device. For example, the voltage input and the voltage sensor can be designed as a single, preferably integrated, device. Additionally or alternatively, the voltage sensing device and the switching device can be designed as one, preferably integrated, component. In particular, the voltage input and the voltage sensing device and the switching device can be designed as one, preferably integrated, device.

[0008] In one embodiment, the voltage input, the voltage sensor, the switching device, the voltage converter and the voltage output are housed in a single unit, e.g., a voltage switchboard.

[0009] Providing the specified output voltage means, in particular, that the voltage level of the output voltage delivered to the load corresponds to the required voltage level of the load. In particular, the output voltage is supplied directly to the load. Preferably, the desired voltage level of the load corresponds to the voltage level of the first input voltage and / or the transformed voltage level. For example, the specified output voltage or the desired voltage level of the load is between 220 and 240 V.

[0010] The switching device is preferably a relay switch. Thus, the switching device can preferably be switched with a power-saving control signal.

[0011] In one embodiment, the voltage switching circuit is preferably configured to switch the switching device to supply the second input voltage to the voltage converter when the voltage detection device detects that the second input voltage is present at the voltage input. This means, in particular, that the switching device is configured to supply the first input voltage to the voltage output without switching the switching device.

[0012] According to a further embodiment, the switching device is a normally closed switch for supplying the first input voltage to the voltage output, and / or the switching device is a normally open switch for supplying the second input voltage to the voltage converter. In particular, a normally closed switch is a switch type in which the default state is closed, meaning that the input voltage is applied to the voltage output. For example, when the normally closed switching device is activated, the switching device is opened and the flow of input voltage to the voltage output is stopped. A normally open switch is preferably a switch type in which the default state is open, meaning that the input voltage is not supplied to the voltage converter.For example, when the normally open switching device is activated, it closes the circuit so that the input voltage can flow to the voltage converter. In other words, in a standard configuration, the switching device preferably connects the voltage measuring device to the voltage output so that the input voltage is applied to the voltage output. In particular, when the switching device switches, the input voltage is supplied to the voltage converter. Preferably, the switching device has two switching positions. The first, preferably preset, switching position connects the voltage sensor to the voltage output, and the second switching position connects the voltage sensor to the voltage converter.

[0013] The switching device is preferably controlled by the voltage measuring circuit.

[0014] Preferably, the first input voltage and / or the second input voltage are supplied to the voltage circuit from the power grid and / or an electrical network.

[0015] In a preferred embodiment, the first input voltage has a higher voltage level than the second input voltage or the second input voltage has a higher voltage level than the first input voltage.

[0016] In a further preferred embodiment, the first input voltage and / or the second input voltage is an alternating voltage.

[0017] Preferably, the first input voltage has a level between 220-240 V, and / or the second input voltage has a level between 100-130 V. The voltage switching unit can thus be used, for example, in Europe and / or North America.

[0018] The load can, in particular, be a fan. The fan is preferably used in an air conditioning unit, for example, to cool a control cabinet.

[0019] In one embodiment, the voltage level of the first input voltage and / or the voltage level of the transformed voltage corresponds to the voltage level of the predetermined output voltage. Thus, the first input voltage and / or the transformed voltage can be output as an output voltage via the voltage output without further transformation.

[0020] The problem is further solved by a voltage switching board that includes the voltage circuit. In particular, the voltage input and / or the voltage detection device and / or the switching device and / or the voltage converter and / or the voltage output are arranged, particularly integrally, on the voltage switching board. Thus, the entire function of the voltage circuit is preferably combined on the voltage switching board as a single device. This makes the voltage circuit easier to use and / or handle.

[0021] The problem is further solved by a climate control unit that includes the load and the voltage circuit or voltage switching board. Specifically, the climate control unit adjusts the temperature and / or humidity in a control cabinet and / or enclosure so that the temperature and / or humidity remain within a specified range. This ensures that electronic devices in the control cabinet and / or enclosure can function properly. The load is, in particular, a fan.

[0022] The problem is further solved by a method for supplying the predetermined output voltage to the load, the method comprising the following steps: • Receiving the first input voltage or the second input voltage via the voltage input; • Determination by the voltage detection device as to whether the first input voltage or the second input voltage is present at the voltage input; • Depending on whether the first input voltage or the second input voltage is applied to the voltage input, supply the first input voltage via the switching device to the voltage output or the second input voltage via the switching device to the voltage converter • Transforming the second input voltage into the transformed voltage by the voltage converter and supplying the transformed voltage to the voltage output; and • to supply the first input voltage as output voltage or the transformed voltage as output voltage to the load via the voltage output.

[0023] Although the method is not claimed and does not fall within the scope of protection, it is part of the present disclosure.

[0024] Preferably, the level of the first input voltage and / or the level of the transformed voltage corresponds to the level of the output voltage. According to the method, the first input voltage can be supplied directly to the voltage output. Alternatively, when the second input voltage is received at the voltage input, the second input voltage can be transformed into the transformed voltage, which is supplied to the voltage output. The voltage output preferably outputs either the first input voltage or the transformed voltage as the output voltage. Thus, the predetermined output voltage can be supplied to the load regardless of the voltage level of the input voltage.

[0025] Preferably, the method uses the voltage switching circuit or voltage switching card. Thus, the method can utilize the technical functions and effects provided by the circuit or voltage switching card as described above.

[0026] In particular, the load is a fan used in a control cabinet air conditioning unit as described above. Preferably, the required voltage level of the load corresponds to the voltage level of the first input voltage and / or the transformed voltage and / or the output voltage.

[0027] In one embodiment, the method further comprises switching the switching device to supply the second input voltage to the voltage converter when the voltage sensing device detects that the second input voltage is received at the voltage input. This means, in particular, that the switching device is configured to supply the first input voltage to the voltage output without switching the switching device.

[0028] According to a further embodiment, the first input voltage and / or the second input voltage is supplied to the voltage input unit via the power grid and / or an electrical network.

[0029] The above and other features and advantages of the invention will become apparent from the following detailed description of preferred embodiments of the invention with reference to the accompanying drawings, in which like reference numerals denote like features, and in which Fig. 1 is a schematic diagram of a voltage circuit; Fig. 2 is a schematic diagram of a voltage switchboard; and Fig. 3 is a flowchart for a method for supplying a load with a predetermined output voltage.

[0030] Fig. Figure 1 shows a schematic representation of a voltage switching circuit 1 according to an embodiment of the invention. A first input voltage 2 or a second input voltage 3 is supplied to the voltage switching circuit 1 from the network 10 and / or an electrical network. The voltage switching circuit 1 outputs a predetermined output voltage 11, which is supplied to a load 5. The predetermined output voltage 11 has a predetermined voltage level corresponding to the voltage level required by the load 5.

[0031] The first input voltage 2 and / or the second input voltage 3 is an alternating voltage. According to the present embodiment, the first input voltage 2 has a higher voltage level than the second input voltage 3. In particular, the first input voltage 2 has a voltage level between 220-240 V, and the second input voltage 3 has a voltage level between 100-130 V. Alternatively, the first input voltage 2 may have a lower voltage level than the second input voltage 3.

[0032] The voltage circuit 1 comprises a voltage input 6 for receiving the first input voltage 2 or the second input voltage 3 and a voltage output 12 for outputting the output voltage 11. The voltage circuit 1 further comprises a voltage detection device 7, a switching device 8 and a voltage converter 9.

[0033] The switching device 8 has two switching positions. In a first switching position, the switching device 8 electrically connects the voltage sensing device 7 to the voltage output 12. Preferably, the first switching position of the switching device is a standard switching position. The switching device 8 is therefore a normally closed switch for electrically connecting the voltage sensing device 7 to the voltage output 12. If the switching device 8 is switched to a second switching position, the voltage sensor 7 is electrically connected to the voltage converter 9. The switching device 8 is therefore a normally open switch for electrically connecting the voltage sensor 7 to the voltage converter.

[0034] According to the Fig. In the embodiment of the voltage circuit 1 shown in Figure 1, the voltage input 6, the voltage detection device 7, the switching device 8, the voltage converter 9, and the voltage output 12 are individual components that form the voltage circuit 1. In an alternative embodiment, the voltage input 6 and the voltage measuring device 7 can be combined into a single component. Alternatively, the voltage input 6 and the voltage measuring device 7 can be combined into a single component of the voltage circuit 1, or the voltage measuring device 7 and the switching device 8 can be combined into a single component of the voltage circuit 1. Therefore, it is possible for some components of the voltage circuit 1 to be combined and form a single component.

[0035] As in Fig. As shown in Figure 2, the voltage circuit 1 can be arranged on a voltage switching board 20. In this case, the components of the voltage circuit 1, i.e., the voltage input 6, the voltage measuring device 7, the switching device 8, the voltage converter 9, and the voltage output 12, are all arranged on the voltage switching board 20. This improves the handling of the voltage circuit 1.

[0036] According to Fig. 2, the power grid 10 and / or an electrical network supplies the first input voltage 2 or the second input voltage 3 to the voltage circuit 1 located on the voltage switching board 20. The voltage circuit 1 then supplies the output voltage 11 to the load 5. The voltage switching board 20 thus contains all the functions of the voltage circuit 1.

[0037] Fig. Fig. 3 shows a flowchart of a method for supplying the predetermined output voltage 11 to the load 5 using the voltage switching circuit 1 according to Fig. 1 or the voltage switching card 20 with the voltage circuit 1 according to Fig. 2.

[0038] In a first step, the first input voltage 2 or the second input voltage 3 is received 101 by the voltage input 6. After reception 101, the first input voltage 2 or the second input voltage 3 is supplied to the voltage detection circuit 7.

[0039] The voltage detection circuit 7 determines whether the first input voltage 2 or the second input voltage 3 was received from the voltage input 6. Preferably, the voltage detection circuit 7 comprises a voltage sensor for determining the voltage level of the first input voltage 2 or the second input voltage 3.

[0040] Depending on whether the first input voltage 2 or the second input voltage 3 is applied to the voltage input 6, the voltage detection circuit 7 controls the switching device 8.

[0041] If the first input voltage 2 is received by the voltage input 6, the first input voltage 2 is supplied 103 directly to the voltage output 12 without switching the switching device 8. The first input voltage 2 is then output 107 to the load 5 as output voltage 11.

[0042] When the voltage detection circuit 7 detects that the second input voltage 3 is received from the voltage input 6, the voltage detection circuit 7 controls the switching device 8 so that the switching device 8 switches 104 to electrically connect the voltage detection circuit 7 to the voltage converter 9. The second input voltage 3 is then supplied to the voltage converter 9.

[0043] The voltage converter 9 transforms 105 the second input voltage 3 into a transformed voltage 13. The transformed voltage 13 is 106 supplied to the voltage output 12 and 107 output as output voltage 11 to the load 5.

[0044] The voltage level of the first input voltage 2 and the voltage level of the transformed voltage 13 correspond to the voltage level of the output voltage 11. Therefore, the first input voltage 2 and the transformed voltage 13 do not need to be transformed or processed before they are output as output voltage 11.

[0045] The invention causes the voltage switching circuit 1 to output a predetermined output voltage 11 regardless of the voltage level of the input voltage 2, 3. In particular, the load 5 may require a voltage level of 220-240 V. The voltage switching circuit 1 can be designed such that it receives the first input voltage 2 with a voltage level of 220-240 V, e.g. when used in Europe, and the second input voltage 3 with a voltage level of 100-130 V, e.g. when used in North America. According to the invention, the voltage switching circuit 1 can supply the first input voltage 2 as output voltage 11 to the load 5. If the second input voltage 3 is supplied to the voltage switching card 1, the second input voltage 3 is transformed such that the voltage level is increased to 220-240 V. The transformed voltage 13 is then supplied to the load 5 as output voltage 13. The output voltage 11 therefore has a voltage level of 220-240 V.

[0046] In one embodiment, load 5 is, for example, a fan used in an air conditioning unit to cool a control cabinet. The fan is connected to voltage circuit 1. Thus, the air conditioning fan can be used in Europe or North America, since the required voltage is supplied to the fan independently of the input voltage 2, 3. For different geographical regions that have power grids with different voltages and / or frequencies, no adaptation of the fan's power circuit is necessary. Therefore, the voltage circuit ensures that load 5, e.g., the fan, can be used in different regions. List of reference symbols 1 voltage circuit 2 first input voltage 3 second input voltage 5 load 6 Voltage input 7 Voltmeter 8 Voltage switching device 9 voltage converters 10 Network 11 Output voltage 12 Voltage output 13 transformed voltage 20 Voltage switchboard 100 Method 101 Reception 102 Investigation 103 Delivery 104 Mediation Convert 105 106 Provision of 107 edition of

Claims

[1] Voltage switching circuit (1) for supplying a predetermined output voltage (11) to a load (5), comprising • a voltage input (6) configured to receive a first input voltage (2) or a second input voltage (3), wherein the first input voltage (2) has a different voltage level than the second input voltage (3); • a voltage detection device (7) configured to determine whether the first input voltage (2) or the second input voltage (3) is received by the voltage input (6); and • a switching device (8) configured to supply the first input voltage (2) to a voltage output (12) or the second input voltage (3) to a voltage converter (9) depending on whether the first input voltage (2) or the second input voltage (3) is received by the voltage input (6) • wherein the voltage converter (9) is configured to transform the second input voltage (3) into a transformed voltage (13) and supply the transformed voltage (13) to the voltage output (12); • wherein the voltage output (12) is configured to output the first input voltage (2) as the output voltage (11) or to output the transformed voltage (13) as the output voltage (11). [2] Voltage switching circuit (1) according to claim 1, wherein the switching device (8) is a relay switch. [3] Voltage switching circuit (1) according to one of the preceding claims, wherein the voltage switching circuit (1) is configured to switch the switching device (8) for supplying the second input voltage (3) to the voltage converter (9) when the voltage detection device (7) detects that the second input voltage (3) is received by the voltage input (6). [4] Voltage switching circuit (1) according to one of the preceding claims, wherein the switching device (8) is a normally closed switch for supplying the first voltage (2) to the voltage output (12) and / or the switching device (8) is a normally open switch for supplying the second voltage (3) to the voltage converter (9). [5] Voltage switching circuit (1) according to one of the preceding claims, wherein the first input voltage (2) and / or the second input voltage (3) are supplied from the mains (10) to the voltage switching circuit (1). [6] Voltage switching circuit (1) according to one of the preceding claims, wherein the first input voltage (2) has a higher level than the second input voltage (3) or the second input voltage (3) has a higher level than the first input voltage (2). [7] Voltage switching circuit (1) according to one of the preceding claims, wherein the first input voltage (2) and / or the second input voltage (3) is an alternating voltage. [8] Voltage switching circuit (1) according to one of the preceding claims, wherein the first input voltage (2) has a level between 220-240 V and / or the second input voltage (3) has a level between 100-130 V. [9] Voltage switching circuit (1) according to one of the preceding claims, wherein the load (5) is a fan. [10] Voltage switching circuit (1) according to one of the preceding claims, wherein the voltage level of the first input voltage (2) and / or the voltage level of the transformed voltage (13) corresponds to the voltage level of the predetermined output voltage (11). [11] Voltage switching board (20) with a voltage switching circuit (1) according to one of the preceding claims. [12] Air conditioning unit comprehensive a load (5), in particular a fan, and a voltage switching circuit (1) according to any one of the preceding claims or a voltage switching board (20) according to claim 11 for supplying a predetermined output voltage (11) to the load (5).

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