Dual-power switching device and air conditioning equipment

Abstract

The utility model provides a dual power supply switching device and air conditioning equipment, the dual power supply switching device comprises a first socket, a second socket and a double-pole double-throw relay, the first socket receives a first alternating current, the second socket receives a second alternating current, and when a first power supply normally outputs the first alternating current, the double-pole double-throw relay outputs the second alternating current. The double-pole-double-throw relay switches on an access between the first socket and the air-conditioning load and switches off an access between the second socket and the load, and the first power supply supplies power to the air-conditioning load; when the first power supply outputs the first alternating current abnormally, the double-pole-double-throw relay conducts the access between the second socket and the air conditioner load, and the second power supply supplies power to the air conditioner load. Compared with a dual-power interlocking contactor comprising a contactor, an electromagnetic relay, a fuse terminal and the like, the dual-power switching device comprising the two sockets and the double-pole double-throw relay provided by the utility model is small in size, can be applied to small-sized air conditioning equipment, and is wide in application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning equipment technical field, especially double power supply switching device and air conditioning equipment. BACKGROUND

[0002] In order to ensure that air conditioning equipment can normally run in the case of power failure or power outage, avoid unnecessary losses such as server downtime caused by too high temperature in the computer room, air conditioning equipment usually adopts double power supply switching scheme, and double power supply switching can make air conditioning equipment run uninterruptedly.

[0003] In the prior art, the air conditioning equipment used in the data computer room usually adopts double power supply interlocking contactor to realize double power supply switching, and the double power supply interlocking contactor includes contactor, electromagnetic relay and fuse terminal and other devices, can switch to standby power supply at millisecond level speed in the case of power failure or power outage, and the double power supply interlocking contactor is large in size and occupies large space, not suitable for small air conditioning equipment.

[0004] In summary, the double power supply switching scheme in the prior art has the problems of large size and small application range. UTILITY MODEL CONTENTS

[0005] The utility model provides double power supply switching device and air conditioning equipment to solve the problem of large size and small application range of the prior art double power supply switching device.

[0006] In the first aspect, the utility model provides a double power supply switching device, which comprises: a first socket, a second socket and a double-pole double-throw relay.

[0007] The first socket is electrically connected with the first power supply and the double-pole double-throw relay, and is used for receiving the first alternating current output by the first power supply.

[0008] The second socket is electrically connected with the second power supply and the double-pole double-throw relay, and is used for receiving the second alternating current output by the second power supply.

[0009] The double-pole double-throw relay is also electrically connected with the air conditioning load, and is used for conducting the path between the first socket and the air conditioning load and disconnecting the path between the second socket and the air conditioning load in the case that the first alternating current output by the first power supply is normal, and conducting the path between the second socket and the air conditioning load and disconnecting the path between the first socket and the air conditioning load in the case that the first alternating current output by the first power supply is abnormal.

[0010] In the technical scheme, the double power supply switching device comprises a first socket, a second socket and a double-pole double-throw relay, wherein the first socket is electrically connected with the first power supply and the double-pole double-throw relay, receives the first alternating current, the second socket is electrically connected with the second power supply and the double-pole double-throw relay, receives the second alternating current, and the double-pole double-throw relay is further electrically connected with the air conditioner load; when the first power supply normally outputs the first alternating current, the path between the first socket and the air conditioner load is turned on, and the path between the second socket and the air conditioner load is turned off, so that the first power supply supplies power to the air conditioner load; when the first power supply abnormally outputs the first alternating current, the path between the second socket and the air conditioner load is turned on, and the path between the first socket and the air conditioner load is turned off, so that the second power supply supplies power to the air conditioner load. The double power supply switching device disclosed by the utility model comprises two sockets and a double-pole double-throw relay, compared with the double power supply interlocking contactor comprising a contactor, an electromagnetic relay and an insurance terminal and the like, the size is small, and the double power supply switching device can be applied to small air conditioner equipment, and the application range is large.

[0011] In a possible implementation manner, a first output end of the first socket is electrically connected with a first end of a coil of the double-pole double-throw relay and a first normally-open contact of the double-pole double-throw relay, a second output end of the first socket is electrically connected with a second end of the coil of the double-pole double-throw relay and a second normally-open contact of the double-pole double-throw relay, and a third output end of the first socket is electrically connected with a grounding end;

[0012] A first output end of the second socket is electrically connected with a first normally-closed contact of the double-pole double-throw relay, a second output end of the second socket is electrically connected with a second normally-closed contact of the double-pole double-throw relay, and a third output end of the second socket is electrically connected with the grounding end;

[0013] The first common end of the double-pole double-throw relay and the second common end of the double-pole double-throw relay are electrically connected with a power input end of the air conditioner load.

[0014] In the technical scheme, the specific connection relationship of the first socket and the double-pole double-throw relay and the specific connection relationship of the second socket and the double-pole double-throw relay are disclosed, when the first alternating current output by the first power supply is normal, the coil of the double-pole double-throw relay is powered, the first normally-open contact and the second normally-open contact are closed, and the path between the first socket and the air conditioner load is turned on; when the first alternating current output by the first power supply is abnormal, the coil of the double-pole double-throw relay is not powered, the first normally-closed contact and the second normally-closed contact are closed, the path between the second socket and the air conditioner load is turned on, and the second power supply is used to supply power to the air conditioner load, so that the air conditioner load can continuously operate when the first power supply is abnormal.

[0015] In a possible implementation manner, the device further comprises a power supply module;

[0016] The power module is electrically connected with the first socket and the double-pole double-throw relay, and is configured to convert the first alternating current into direct current.

[0017] The double-pole double-throw relay is configured to, in the case that the direct current is normal, turn on a path between the first socket and the air conditioner load and turn off a path between the second socket and the air conditioner load, and in the case that the direct current is abnormal, turn on the path between the second socket and the air conditioner load and turn off the path between the first socket and the air conditioner load.

[0018] In the above technical solution, the power module is electrically connected with the first socket and the double-pole double-throw switch, the power module converts alternating current into direct current, and the double-pole double-throw relay is controlled by the converted direct current, so that the double-pole double-throw relay in the dual-power switching device is a double-pole double-throw relay controlled by direct current, and the flexibility of the dual-power switching device is improved.

[0019] In a possible implementation, a first output end of the first socket is electrically connected with a first input end of the power module and a first normally-open contact of the double-pole double-throw relay, a second output end of the first socket is electrically connected with a second input end of the power module and a second normally-open contact of the double-pole double-throw relay, and a third output end of the first socket is electrically connected with a ground end.

[0020] A first output end of the second socket is electrically connected with a first normally-closed contact of the double-pole double-throw relay, a second output end of the second socket is electrically connected with a second normally-closed contact of the double-pole double-throw relay, and a third output end of the second socket is electrically connected with the ground end.

[0021] A first end of a coil of the double-pole double-throw relay is electrically connected with a first output end of the power module, a second end of the coil of the double-pole double-throw relay is electrically connected with a second output end of the power module, and a first common end of the double-pole double-throw relay and a second common end of the double-pole double-throw relay are electrically connected with a power input end of the air conditioner load.

[0022] In the technical scheme, the specific connection relationship among the first socket, the power module and the double-pole double-throw relay, and the specific connection relationship between the second socket and the double-pole double-throw relay are disclosed, when the first alternating current output by the first power supply is normal, the current module converts the first alternating current into direct current, so that the coil of the double-pole double-throw relay is electrified, the first normally open contact and the second normally open contact are closed, the path between the first socket and the air conditioner load is turned on, so as to use the first power supply to supply power to the air conditioner load; when the first alternating current output by the first power supply is abnormal, the power module does not output direct current, so that the coil of the double-pole double-throw relay is not electrified, the first normally closed contact and the second normally closed contact are closed, the path between the second socket and the air conditioner load is turned on, so as to use the second power supply to supply power to the air conditioner load, so that the air conditioner load can run uninterruptedly when the first power supply is abnormal.

[0023] In a possible implementation manner, the first socket comprises a first fuse;

[0024] A first end of the first fuse is electrically connected with a first input end of the first socket, and a second end of the first fuse is electrically connected with a first output end of the first socket.

[0025] In a possible implementation manner, the second socket comprises a second fuse;

[0026] A first end of the second fuse is electrically connected with a first input end of the second socket, and a second end of the second fuse is electrically connected with a first output end of the second socket.

[0027] In the technical scheme, by selecting the socket comprising the fuse, the safety of the dual-power switching device can be improved, and space can be effectively saved.

[0028] In a possible implementation manner, the first socket is an IEC C14 socket module;

[0029] The second socket is an IEC C14 socket module.

[0030] In the technical scheme, the first socket and the second socket are IEC C14 socket modules, which saves space and facilitates maintenance of the fuse.

[0031] In a second aspect, the utility model also provides a kind of air conditioning equipment, comprising the dual-power switching device as any one of the first aspect.

[0032] In a possible implementation manner, the first socket and the second socket in the dual-power switching device are installed on the air conditioner panel.

[0033] In a possible implementation manner, the power module is installed on the side plate of the air conditioning equipment.

[0034] In the technical scheme, the first socket and the second socket are installed on the air conditioner panel, and the power module is installed on the side plate of the air conditioner device, so that the occupied space of the dual power switching device can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 A structural schematic diagram of a dual power switching device provided by the embodiment of the present application is shown in the figure.

[0037] Figure 2 A working schematic diagram of a dual power switching device provided by the embodiment of the present application is shown in the figure.

[0038] Figure 3 A structural schematic diagram of another dual power switching device provided by the embodiment of the present application is shown in the figure.

[0039] Figure 4 A working schematic diagram of another dual power switching device provided by the embodiment of the present application is shown in the figure.

[0040] Figure 5 A schematic diagram of a power module provided by the embodiment of the present application is shown in the figure.

[0041] Figure 6 A structural schematic diagram of another dual power switching device provided by the embodiment of the present application is shown in the figure.

[0042] Figure 7 A schematic diagram of an IEC C14 socket module provided by the embodiment of the present application is shown in the figure.

[0043] Figure 8 A partial structural schematic diagram of an air conditioner device provided by the embodiment of the present application is shown in the figure.

[0044] Figure 9 A partial structural schematic diagram of another air conditioner device provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0045] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following will combine the drawings to make the utility model further detailed description, obviously, the described embodiment is only the utility model part embodiment, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the scope of the utility model protection.

[0046] As Figure 1 The utility model provides a kind of double power supply switching device's structure schematic diagram provided by the embodiment of the utility model, including first socket 11, second socket 12 and double pole double throw relay 13;

[0047] First socket 11 is electrically connected with first power supply and double pole double throw relay 13, for receiving the first alternating current output by first power supply;

[0048] Second socket 12 is electrically connected with second power supply and double pole double throw relay 13, for receiving the second alternating current output by second power supply;

[0049] Double pole double throw relay 13 is also electrically connected with air conditioner load, for in the case where the first alternating current output by first power supply is normal, the passage between first socket 11 and air conditioner load is turned on, the passage between second socket 12 and air conditioner load is disconnected, to use first power supply to power the air conditioner load, in the case where the first alternating current output by first power supply is abnormal, the passage between second socket 12 and air conditioner load is turned on, the passage between first socket and air conditioner load is disconnected, to use second power supply to power the air conditioner load.

[0050] The double power supply switching device provided by the utility model includes first socket, second socket and double pole double throw relay, wherein, first socket is electrically connected with first power supply and double pole double throw relay, receives first alternating current, second socket is electrically connected with second power supply and double pole double throw relay, receives second alternating current, double pole double throw relay is also electrically connected with air conditioner load;When first power supply normally outputs first alternating current, the passage between first socket and air conditioner load is turned on, the passage between second socket and air conditioner load is disconnected, to make first power supply power the air conditioner load;When first power supply abnormally outputs first alternating current, the passage between second socket and air conditioner load is turned on, the passage between first socket and air conditioner load is disconnected, to make second power supply power the air conditioner load.The double power supply switching device including two sockets and a double pole double throw relay disclosed in the utility model embodiment, compared with double power supply interlock contactor including contactor, electromagnetic relay and fuse terminal etc. Device, size is small, can be applied in small air conditioning equipment, and the scope of application is larger.

[0051] It should be noted that the utility model includes but is not limited to that the first power supply is commercial power, and the second power supply is an uninterruptible power supply (UPS), and the utility model is not limited to this.

[0052] In the embodiment of the utility model, the first power supply can be used as a default power supply, and the second power supply can be used as a backup power supply, that is, when the alternating current output by the first power supply is normal, the alternating current output by the first power supply is used to supply power to the air conditioner load, and when the alternating current output by the first power supply is abnormal, the alternating current output by the second power supply is used to supply power to the air conditioner load.

[0053] In one embodiment, as shown in Figure 1 The first output end of the first socket 11 is electrically connected with the first end of the coil K of the double-pole double-throw relay and the first normally open contact NO1 of the double-pole double-throw relay 13, the second output end of the first socket 11 is electrically connected with the second end of the coil K of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13, and the third output end of the first socket 11 is electrically connected with the ground end.

[0054] The first output end of the second socket 12 is electrically connected with the first normally closed contact NC1 of the double-pole double-throw relay 13, the second output end of the second socket 12 is electrically connected with the second normally closed contact NC2 of the double-pole double-throw relay 13, and the third output end of the second socket 12 is electrically connected with the ground end.

[0055] The first common end COM1 of the double-pole double-throw relay 13 and the second common end COM2 of the double-pole double-throw relay 13 are electrically connected with the power input end of the air conditioner load.

[0056] Specifically, as shown in Figure 2 When the first alternating current output by the first power supply is normal, the coil K of the double-pole double-throw relay 13 is powered, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are closed, the path between the air conditioner load and the first output end of the first socket 11 and the second output end of the first socket 11 is conducted, and the path between the second socket 12 and the air conditioner load is disconnected, so that the first power supply 11 is used to supply power to the air conditioner load at this time.

[0057] As shown in Figure 1As shown in the figure, when the first alternating current output by the first power supply is abnormal, the coil K of the double-pole double-throw relay 13 is not powered, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are disconnected, the first normally closed contact NC1 of the double-pole double-throw relay 13 and the second normally closed contact NC2 of the double-pole double-throw relay 13 are closed, the path between the air conditioner load and the first output end of the second socket 12 and the second output end of the second socket 12 is turned on, and the path between the first socket 11 and the air conditioner load is disconnected, at this time, the second power supply 12 is used to supply power to the air conditioner load.

[0058] When the first alternating current output by the first power supply is normal, as shown in the figure, Figure 2 the coil K of the double-pole double-throw relay 13 is powered again, the first normally closed contact NC1 of the double-pole double-throw relay 13 and the second normally closed contact NC2 of the double-pole double-throw relay 13 are disconnected, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are closed again, the path between the air conditioner load and the first output end of the first socket 11 and the second output end of the first socket 11 is turned on, and the path between the second socket 12 and the air conditioner load is disconnected, at this time, the first power supply 11 is used to supply power to the air conditioner load.

[0059] Figure 1 and Figure 2 The double-pole double-throw relay shown in the figure is a relay controlled by alternating current, and the double-pole double-throw relay in the dual-power switching device provided in the embodiments of the present application can also be a relay controlled by direct current, and the double-pole double-throw relay in the dual-power switching device will be described below as a relay controlled by direct current. Figure 3 and Figure 4 The double-pole double-throw relay in the dual-power switching device is a relay controlled by direct current.

[0060] In another embodiment, the dual-power switching device further comprises a power supply module 14, as shown in the figure, Figure 3 which is a structural schematic diagram of another dual-power switching device provided in the embodiments of the present application,

[0061] The power supply module 14 is electrically connected with the first socket 11 and the double-pole double-throw relay 13, and is used to convert the first alternating current into direct current;

[0062] The double-pole double-throw relay 13 is used to turn on the path between the first socket 11 and the air conditioner load when the direct current is normal, and disconnect the path between the second socket 12 and the air conditioner load, and turn on the path between the second socket 12 and the air conditioner load when the direct current is abnormal, and disconnect the path between the first socket 11 and the air conditioner load.

[0063] In the embodiment of the utility model, the double-pole double-throw relay is a relay controlled by direct current, and the power module 14 converts the alternating current output by the first power supply into direct current, and provides stable constant voltage for the double-pole double-throw relay 13 through the direct current, so as to ensure long-term stable operation of the double-pole double-throw relay 13.

[0064] Specifically, as shown in Figure 3 The first output end of the first socket 11 is electrically connected with the first input end of the power module 14 and the first normally open contact NO1 of the double-pole double-throw relay 13, the second output end of the first socket 11 is electrically connected with the second input end of the power module 14 and the second normally open contact NO2 of the double-pole double-throw relay 13, and the third output end of the first socket 11 is electrically connected with the ground end.

[0065] The first output end of the second socket 12 is electrically connected with the first normally closed contact NC1 of the double-pole double-throw relay 13, the second output end of the second socket 12 is electrically connected with the second normally closed contact NC2 of the double-pole double-throw relay 13, and the third output end of the second socket 12 is electrically connected with the ground end.

[0066] The first end of the coil K of the double-pole double-throw relay 13 is electrically connected with the first output end of the power module 14, the second end of the coil K of the double-pole double-throw relay 13 is electrically connected with the second output end of the power module 14, and the first common end COM1 of the double-pole double-throw relay 13 and the second common end COM2 of the double-pole double-throw relay 13 are electrically connected with the power input end of the air conditioner load.

[0067] As shown in Figure 4 When the first alternating current output by the first power supply is normal, the power module 14 receives the first alternating current and outputs direct current, so that the coil K of the double-pole double-throw relay 13 is electrified, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are closed, the path between the air conditioner load and the first output end of the first socket 11 and the second output end of the first socket 11 is conducted, and the path between the second socket 12 and the air conditioner load is disconnected, so as to use the first power supply 11 to supply power to the air conditioner load.

[0068] As shown in Figure 3As shown in FIG. 1, when the first AC power output by the first power supply is abnormal, the power module 14 does not output DC power, the coil K of the double-pole double-throw relay 13 is not powered, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are disconnected, the first normally closed contact NC1 of the double-pole double-throw relay 13 and the second normally closed contact NC2 of the double-pole double-throw relay 13 are closed, the path between the air conditioner load and the first output end of the second socket 12 and the second output end of the second socket 12 is turned on, and the path between the first socket 11 and the air conditioner load is disconnected, so that the air conditioner load is powered by the second power supply 12.

[0069] As shown in FIG. 2, when the first AC power output by the first power supply is normal, the power module 14 receives the first AC power, outputs DC power, the coil K of the double-pole double-throw relay 13 is powered, the first normally closed contact NC1 of the double-pole double-throw relay 13 and the second normally closed contact NC2 of the double-pole double-throw relay 13 are disconnected, and the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are closed, so that the path between the air conditioner load and the first output end of the first socket 11 and the second output end of the first socket 11 is turned on, and the path between the second socket 12 and the air conditioner load is disconnected, so that the air conditioner load is powered by the first power supply 11. Figure 4 As shown in FIG. 3, when the first AC power output by the first power supply is abnormal, the power module 14 does not output DC power, the coil K of the double-pole double-throw relay 13 is not powered, the first normally open contact NO1 of the double-pole double-throw relay 13 and the second normally open contact NO2 of the double-pole double-throw relay 13 are disconnected, the first normally closed contact NC1 of the double-pole double-throw relay 13 and the second normally closed contact NC2 of the double-pole double-throw relay 13 are closed, the path between the air conditioner load and the first output end of the second socket 12 and the second output end of the second socket 12 is turned on, and the path between the first socket 11 and the air conditioner load is disconnected, so that the air conditioner load is powered by the second power supply 12.

[0070] In a specific implementation, the power module 14 can be an APV-8 series power module, which is an 8W AC-to-DC constant voltage single-group output power module, the input voltage is 90-264VAC, and the factory-fixed output is 24VDC, as shown in FIG. 4, which is a structure diagram of a power module provided in the embodiment of the present application, including an electromagnetic filtering circuit 61, a correction circuit 62, a switching circuit 63, a rectification / filtering circuit 64, a pulse width modulation control circuit 65, a bridge rectifier 66, and a detection circuit 67. Figure 5

[0071] The electromagnetic filtering circuit 61, the correction circuit 62, the switching circuit 63, and the rectification / filtering circuit 64 are electrically connected in sequence, the input end of the electromagnetic filtering circuit 61 is used for inputting the first AC power, the positive voltage output end of the rectification / filtering circuit 64 (i.e., the first output end of the power module 14) is electrically connected with the first end of the coil K of the double-pole double-throw relay 13, and the negative voltage output end of the rectification / filtering circuit 64 (i.e., the second output end of the power module 14) is electrically connected with the second end of the coil K of the double-pole double-throw relay 13;

[0072] ​The pulse width modulation control circuit 65, the bridge rectifier 66 and the detection circuit 67 are electrically connected in sequence, the output end of the pulse width modulation control circuit 65 is electrically connected with the input end of the switching circuit 63, and the input end of the detection circuit 67 is electrically connected with the positive voltage output end of the rectification / filtering circuit 64.

[0073] The electromagnetic filtering loop 61 filters out high-frequency interference noise (such as surges, peak voltage) in the first alternating current, while preventing the noise generated by the power supply itself from being fed back to the power grid, ensuring the purity of the input power; the correction loop 62 adjusts the waveform of the input current to be consistent with the phase of the first alternating current, improves the power factor, reduces harmonic distortion, improves energy efficiency and meets the electromagnetic compatibility standard; the corrected first alternating current passes through the switching circuit 63, and under the driving of the PWM control signal of the pulse width modulation control circuit 65, the corrected first alternating current is converted into a high-frequency alternating current pulse; the rectification / filtering circuit 64 rectifies and filters the high-frequency alternating current pulse and outputs direct current (24VDC).

[0074] Among them, the bridge rectifier 66 and the detection circuit 67 monitor the output direct current voltage and current in real time, and feed the sampling signal to the pulse width modulation control circuit 65. If the output deviates from the set value (such as 24VDC), the feedback signal triggers the pulse width modulation control circuit 65 to adjust.

[0075] The power module 14 has a self-protection function, which can avoid high-voltage impact to cause equipment downtime. For example, when the air conditioner load is greater than 105% of the rated output power or a short circuit occurs, the power module 14 can be self-protected through the hiccup mode, and can automatically recover when the abnormal condition is removed; when the output voltage of the power module 14 is greater than 27.6V, the output voltage can be automatically turned off, and the diode is clamped to avoid damaging the electrical components in the system.

[0076] When the dual power supply switching device needs to be compatible with the power supply system of both North America and Europe, the dual power supply switching device includes the power module 14; when the dual power supply switching device needs to be compatible with the power supply system in a single region, the power module 14 can be cancelled, and the double-pole double-throw relay 13 controlled by alternating current can be used.

[0077] For example, when only the power supply system in Europe needs to be compatible, the coil K voltage of the double-pole double-throw relay 13 is 230V; when only the power supply system in North America needs to be compatible, the coil K voltage of the double-pole double-throw relay 13 is 120V.

[0078] In the specific embodiment of the utility model, the double-pole double-throw relay 13 has two independent blades and two common terminals, and can switch two different circuits at the same time, for example, in the actual application of the utility model, the power consumption of the selected double-pole double-throw relay 13 is 0.9w, the rated current is 36.9mA, the coil voltage is 24VDC, and the maximum switching voltage is 250VAC, and the utility model has the advantages of small size, light weight, and easier overseas transportation requirements.

[0079] The air conditioner controller generally restarts when the power-off time exceeds 70-80ms, and the pull-in and release time of the double-pole double-throw relay 13 is at most 25ms, so that the power supply of the equipment during switching can be ensured uninterrupted.

[0080] In one embodiment, as shown in Figure 6 The first socket 11 can include a first fuse F1.

[0081] The first end of the first fuse F1 is electrically connected to the first input end of the first socket 11, and the second end of the first fuse F1 is electrically connected to the first output end of the first socket 11.

[0082] The second socket 12 includes a second fuse F2.

[0083] The first end of the second fuse F2 is electrically connected to the first input end of the second socket 12, and the second end of the second fuse F2 is electrically connected to the first output end of the second socket 12.

[0084] In the embodiment of the utility model, the first end of the first fuse F1 is electrically connected to the first input end (i.e. the live wire L input end) of the first socket 11, and the second end of the first fuse F1 is electrically connected to the first output end of the first socket 11.

[0085] The second input end (i.e. the zero line input end) of the first socket 11 is electrically connected to the second output end of the first socket 11, and the third input end (i.e. the ground line input end) of the first socket 11 is electrically connected to the third output end of the first socket 11.

[0086] The first end of the second fuse F2 is electrically connected to the first input end (i.e. the live wire L input end) of the second socket 12, and the second end of the second fuse F2 is electrically connected to the first output end of the second socket 12.

[0087] The second input end (i.e. the zero line input end) of the second socket 12 is electrically connected to the second output end of the second socket 12, and the third input end (i.e. the ground line input end) of the second socket 12 is electrically connected to the third output end of the second socket 12.

[0088] It should be noted that the capacity of the first fuse and the second fuse is not specifically limited, and can be changed according to actual requirements.

[0089] In an embodiment, the first socket 11 can be an IEC C14 socket module, and the second socket 12 is also an IEC C14 socket module. Figure 7 As shown in the schematic diagram of the IEC C14 socket module provided by the embodiment of the utility model, the IEC C14 socket module has small size and is convenient to take power, the electrical parameters of the IEC C14 socket module are 250V&10A, the specification of the internal support installation fuse is 5*20mm, and the two power supply systems of North America and Europe are compatible, that is, 5A (T) @ 230V and 10A (T) @ 115V.

[0090] Based on the same concept, the embodiment of the utility model also provides an air conditioning equipment, which comprises the double power supply switching device described above, the principle of solving the technical problems of the air conditioning equipment and the principle of solving the technical problems of the double power supply switching device are similar, and the implementation of the air conditioning equipment can refer to the implementation of the double power supply switching device, and the repeated parts will not be described here.

[0091] As shown in the partial structure schematic diagram of the air conditioning equipment provided by the embodiment of the utility model, the first socket 11 and the second socket 12 in the double power supply switching device are installed on the air conditioning panel, and the double-pole double-throw relay 13 in the double power supply switching device is installed on the side plate of the air conditioning equipment. Figure 8

[0092] In the embodiment of the utility model, the first socket 11 and the second socket 12 are installed on the air conditioning panel, which not only saves space but also facilitates maintenance of the fuse, compared with the circuit breaker, the specification size is small and the power is convenient and fast, and the fuse has the characteristics of sensitive protection, accuracy and the like.

[0093] As shown in the partial structure schematic diagram of another air conditioning equipment provided by the embodiment of the utility model, when the double power supply switching device in the air conditioning equipment comprises a power supply module 14, the power supply module 14 is installed on the side plate of the air conditioning equipment. Figure 9

[0094] It should be noted that the type of the power supply module 14, the specification type of the first socket 11 and the specification type of the second socket are not specifically limited.

[0095] ​​The double power supply switching device and air conditioning equipment, the double power supply switching device comprises a first socket, a second socket and a double-pole double-throw relay, wherein the first socket is electrically connected with the first power supply and the double-pole double-throw relay, receives the first alternating current, the second socket is electrically connected with the second power supply and the double-pole double-throw relay, receives the second alternating current, and the double-pole double-throw relay is further electrically connected with the air conditioning load; when the first power supply normally outputs the first alternating current, the path between the first socket and the air conditioning load is turned on, the path between the second socket and the air conditioning load is turned off, so that the first power supply supplies power to the air conditioning load; when the first power supply abnormally outputs the first alternating current, the path between the second socket and the air conditioning load is turned on, the path between the first socket and the air conditioning load is turned off, so that the second power supply supplies power to the air conditioning load.

[0096] Those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the utility model claims and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A dual power switching device, characterized by, The device comprises: a first socket, a second socket and a double-pole double-throw relay; the first socket is electrically connected with a first power supply and the double-pole double-throw relay, and is used for receiving first alternating current output by the first power supply; the second socket is electrically connected with a second power supply and the double-pole double-throw relay, and is used for receiving second alternating current output by the second power supply; the double-pole double-throw relay is further electrically connected with an air conditioner load, and is used for, in the case that the first alternating current output by the first power supply is normal, conducting a path between the first socket and the air conditioner load and breaking a path between the second socket and the air conditioner load, and in the case that the first alternating current output by the first power supply is abnormal, conducting the path between the second socket and the air conditioner load and breaking the path between the first socket and the air conditioner load.

2. The apparatus of claim 1, wherein, a first output end of the first socket is electrically connected with a first end of a coil of the double-pole double-throw relay and a first normally-open contact of the double-pole double-throw relay, a second output end of the first socket is electrically connected with a second end of the coil of the double-pole double-throw relay and a second normally-open contact of the double-pole double-throw relay, and a third output end of the first socket is electrically connected with a grounding end; a first output end of the second socket is electrically connected with a first normally-closed contact of the double-pole double-throw relay, a second output end of the second socket is electrically connected with a second normally-closed contact of the double-pole double-throw relay, and a third output end of the second socket is electrically connected with the grounding end; a first common end of the double-pole double-throw relay and a second common end of the double-pole double-throw relay are electrically connected with a power input end of the air conditioner load.

3. The apparatus of claim 1, wherein, The device further comprises a power module; the power module is electrically connected with the first socket and the double-pole double-throw relay, and is used for converting the first alternating current into direct current; the double-pole double-throw relay is used for, in the case that the direct current is normal, conducting the path between the first socket and the air conditioner load and breaking the path between the second socket and the air conditioner load, and in the case that the direct current is abnormal, conducting the path between the second socket and the air conditioner load and breaking the path between the first socket and the air conditioner load.

4. The apparatus of claim 3, wherein, a first output end of the first socket is electrically connected with a first input end of the power module and the first normally-open contact of the double-pole double-throw relay, a second output end of the first socket is electrically connected with a second input end of the power module and the second normally-open contact of the double-pole double-throw relay, and a third output end of the first socket is electrically connected with the grounding end; a first output end of the second socket is electrically connected with the first normally-closed contact of the double-pole double-throw relay, a second output end of the second socket is electrically connected with the second normally-closed contact of the double-pole double-throw relay, and a third output end of the second socket is electrically connected with the grounding end; A first end of a coil of the double-pole double-throw relay is electrically connected to a first output end of the power supply module, a second end of the coil of the double-pole double-throw relay is electrically connected to a second output end of the power supply module, and a first common end of the double-pole double-throw relay and a second common end of the double-pole double-throw relay are electrically connected to a power input end of the air conditioner load.

5. The apparatus of any one of claims 1-4, wherein, The first socket comprises a first fuse; A first end of the first fuse is electrically connected to a first input end of the first socket, and a second end of the first fuse is electrically connected to a first output end of the first socket.

6. The apparatus of claim 5, wherein, The second socket comprises a second fuse; A first end of the second fuse is electrically connected to a first input end of the second socket, and a second end of the second fuse is electrically connected to a first output end of the second socket.

7. The apparatus of claim 6, wherein, The first socket is an IEC C14 socket module. The second socket is an IEC C14 socket module.

8. An air conditioning apparatus characterized by comprising: The dual power supply switching device comprises the double-pole double-throw relay.

9. The air conditioning apparatus according to claim 8, wherein The first socket and the second socket in the dual power supply switching device are installed on an air conditioner panel.

10. The air conditioning apparatus according to claim 9, wherein The power supply module in the dual power supply switching device is installed on a side plate of the air conditioner.

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