CN111174391A - Emergency power supply protection device for indoor unit of multi-split system - Google Patents
Emergency power supply protection device for indoor unit of multi-split system Download PDFInfo
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- CN111174391A CN111174391A CN202010169701.3A CN202010169701A CN111174391A CN 111174391 A CN111174391 A CN 111174391A CN 202010169701 A CN202010169701 A CN 202010169701A CN 111174391 A CN111174391 A CN 111174391A
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- 238000001514 detection method Methods 0.000 claims abstract description 62
- 230000005856 abnormality Effects 0.000 claims abstract description 48
- 230000008878 coupling Effects 0.000 claims description 61
- 238000010168 coupling process Methods 0.000 claims description 61
- 238000005859 coupling reaction Methods 0.000 claims description 61
- 230000003287 optical effect Effects 0.000 claims description 37
- 238000005070 sampling Methods 0.000 claims description 32
- 238000002955 isolation Methods 0.000 claims description 31
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 7
- 230000008034 disappearance Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Biomedical Technology (AREA)
- Protection Of Static Devices (AREA)
Abstract
The application provides a many online system indoor set emergency power supply protection device includes: a power supply switching circuit and an abnormality detection circuit. The first end of the power supply switching circuit is used for being electrically connected with a first power supply. And the second end of the power supply switching circuit is electrically connected with a second power supply. And the third end of the power supply switching circuit is used for electrically connecting a load. The power supply switching circuit is used for switching the first power supply or the second power supply to supply power to the load. The abnormality detection circuit is electrically connected with the fourth end of the power supply switching circuit. The abnormity detection circuit is used for detecting whether the power supply of the first power supply is normal or not so as to determine whether a power supply normal signal is output to the controller or not. This application passes through power supply switching circuit with unusual detection circuitry cooperation not only can guarantee the normal operating of load, avoids data loss, can also avoid many online systems to appear interior machine disappearance trouble, improves the reliability of many online systems operation.
Description
Technical Field
The application relates to the technical field of multi-online systems, in particular to an emergency power supply protection device for an indoor unit of a multi-online system.
Background
With the application of the multi-split air conditioning unit becoming more and more extensive, the number of the internal machines which can be connected by the multi-split system used in many public places becomes more and more (namely, the network nodes of the multi-split system become more and more), the assembly environment becomes more and more complex, and particularly, in the air conditioner assembled in an office building, because the power supply of each internal machine is independently controlled by each business owner, the situation that part of the internal machines are independently powered off frequently occurs. Once power failure or abnormal power supply occurs, air conditioners (namely, VIP units) in important places with strict requirements on environment temperature and humidity cannot work, and unpredictable economic loss can be caused.
At present, when a multi-split system is used, a VIP unit cannot normally operate due to power failure or abnormal power supply, and the problem of data loss is caused.
Disclosure of Invention
Therefore, it is necessary to provide an emergency power supply protection device for an indoor unit of a multi-split air conditioning system, aiming at the problem that when the existing multi-split air conditioning system is in use, a VIP unit in the multi-split air conditioning system cannot normally operate due to power failure or abnormal power supply, and data loss is caused.
An emergency power supply protection device for an indoor unit of a multi-split system comprises:
the first end of the power supply switching circuit is used for being electrically connected with a first power supply, the second end of the power supply switching circuit is electrically connected with a second power supply, and the third end of the power supply switching circuit is used for being electrically connected with a load and switching the first power supply or the second power supply to supply power to the load; and
and the abnormity detection circuit is electrically connected with the fourth end of the power supply switching circuit and is used for detecting whether the power supply of the first power supply is normal or not so as to determine whether a power supply normal signal is output to the controller or not.
In one embodiment, if the abnormality detection circuit detects that the first power supply is abnormal or powered down, the abnormality detection circuit does not output the power supply normal signal to the controller;
if the abnormality detection circuit detects that the first power supply is normal in power supply, the abnormality detection circuit outputs the power supply normal signal to the controller.
In one embodiment, the power switching circuit includes:
a first end of the relay switch is used for being electrically connected with a first end of the first power supply, a second end of the relay switch is electrically connected with the second power supply, a third end and a fourth end of the relay switch are both electrically connected with the load, a first end of the relay coil is connected with a second end of the first power supply and a first end of the abnormality detection circuit in a common mode, and a second end of the relay coil is electrically connected with a second end of the abnormality detection circuit;
the relay is used for switching the first power supply or the second power supply to supply power to the load.
In one embodiment, the abnormality detection circuit includes:
a first end of the sampling circuit is electrically connected with a first end of the relay coil, and a second end of the sampling circuit is electrically connected with a second end of the relay coil; and
the optical coupling isolation circuit comprises an optical coupling isolation circuit, wherein a first end of the optical coupling isolation circuit is electrically connected with a first end of the sampling circuit, a second end of the optical coupling isolation circuit is electrically connected with a second end of the sampling circuit, a third end of the optical coupling isolation circuit is used for electrically connecting a third power supply, a fourth end of the optical coupling isolation circuit is electrically connected with the controller and used for determining whether to output a power supply normal signal to the controller according to whether the power supply of the first power supply is normal or not.
In one embodiment, the abnormality detection circuit further includes:
and the first end of the voltage division circuit is connected with the first end of the sampling circuit and the first end of the optical coupling isolation circuit in a common mode, and the second end of the voltage division circuit is electrically connected with the second end of the relay coil.
In one embodiment, the abnormality detection circuit further includes:
and the first end of the current limiting circuit is electrically connected with the fourth end of the optical coupling isolation circuit, and the second end of the current limiting circuit is grounded.
In one embodiment, the abnormality detection circuit includes:
the first end of the transformer coupling circuit is used for being electrically connected with the first power supply, the second end of the transformer coupling circuit is electrically connected with the second end of the relay coil, the third end of the transformer coupling circuit is used for being electrically connected with a third power supply, and the fourth end of the transformer coupling circuit is electrically connected with the controller and used for determining whether to output the power supply normal signal to the controller according to whether the power supply of the first power supply is normal or not.
In one embodiment, the abnormality detection circuit further includes:
and the voltage division circuit is connected between the second end of the relay coil and the second end of the transformer coupling circuit in series.
In one embodiment, the abnormality detection circuit further includes:
and the first end of the sampling circuit is connected with the first end of the relay coil and the first end of the transformer coupling circuit in a sharing mode, and the second end of the sampling circuit is connected with the second end of the relay coil and the second end of the transformer coupling circuit in a sharing mode.
In one embodiment, the sampling circuit comprises:
and a first end of the first resistor is electrically connected with the first end of the relay coil, and a second end of the first resistor is electrically connected with the second end of the relay coil.
In one embodiment, the voltage divider circuit includes:
and the first end of the second resistor is electrically connected with the first end of the optical coupling isolation circuit or the second end of the transformer coupling circuit, and the second end of the second resistor is electrically connected with the second end of the relay coil.
Compared with the prior art, the emergency power supply protection device for the indoor unit of the multi-split system has the advantages that when the first power supply is powered off or abnormal power supply occurs, the power supply switching circuit can automatically switch the power supply mode of the load from the first power supply to the second power supply. Meanwhile, the abnormality detection circuit can detect whether the power supply of the first power supply is normal in real time so as to determine whether a power supply normal signal is output to the controller, and therefore the current running mode of the load is reported to the multi-split system through the controller. This application passes through power supply switching circuit with unusual detection circuitry cooperation not only can guarantee the normal operating of load, avoids data loss, can also avoid many online systems to appear interior machine disappearance trouble, improves the reliability of many online systems operation.
Drawings
Fig. 1 is a schematic circuit diagram of an emergency power supply protection device 10 for an indoor unit of a multi-split system according to an embodiment of the present application;
fig. 2 is a partial circuit diagram of a load according to an embodiment of the present application;
fig. 3 is a circuit diagram of an application scenario of an emergency power supply protection device 10 for an indoor unit of a multi-split system according to an embodiment of the present application;
fig. 4 is a circuit diagram of an application scenario of an emergency power supply protection device 10 for an indoor unit of a multi-split system according to another embodiment of the present application;
fig. 5 is a circuit diagram of an application scenario of an emergency power supply protection device 10 for an indoor unit of a multi-split system according to another embodiment of the present application.
10 multi-split system indoor unit emergency power supply protection device
100 power supply switching circuit
101 load
110 first power supply
120 second power supply
130 Relay
200 abnormality detection circuit
201 controller
210 sampling circuit
211 first resistance
220 optical coupling isolation circuit
221 third power supply
230 voltage division circuit
231 second resistance
240 current limiting circuit
250 transformer coupling circuit
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present application provides an emergency power supply protection device 10 for an indoor unit of a multi-split system, including: a power supply switching circuit 100 and an abnormality detection circuit 200. The first terminal of the power switching circuit 100 is electrically connected to a first power source 110. The second terminal of the power switching circuit 100 is electrically connected to the second power source 120. The third terminal of the power switching circuit 100 is electrically connected to a load 101. The power switching circuit 100 is configured to switch the first power source 110 or the second power source 120 to supply power to the load 101. The abnormality detection circuit 200 is electrically connected to the fourth terminal of the power supply switching circuit 100. The abnormality detection circuit 200 is configured to detect whether the power supply of the first power source 110 is normal, so as to determine whether to output a power supply normal signal to the controller 201.
It is understood that the specific circuit structure of the power switching circuit 100 is not limited as long as the power switching circuit has the function of switching the first power source 110 or the second power source 120 to supply power to the load 101. The specific circuit structure of the power switching circuit 100 can be selected according to actual requirements. In one embodiment, the power switching circuit 100 may be a single pole double throw relay switch. In one embodiment, the power switching circuit 100 may also be an intelligent switch. The power switching circuit 100 can switch the power supply mode of the load 101 from the first power source 110 to the second power source 120.
In one embodiment, the first power source 110 may be a system power source of a multi-split system. Specifically, the first power source 110 may be mains power. The first power source 110 may be a large-sized battery. In one embodiment, the second power source 120 may be a backup power source for a multi-split system. Specifically, the second power source 120 may be a battery backup power source. In one embodiment, the load 101 is a VIP unit of a multi-split system. Namely, when the emergency power supply protection device 10 of the indoor unit of the multi-split air conditioning system is used, the normal operation of the VIP unit is always ensured.
Specifically, when the emergency power supply protection device 10 of the indoor unit of the multi-split air conditioning system is in use, and when the first power supply 110 is powered off or is abnormally powered on, the power supply switching circuit 100 may automatically switch the power supply mode of the load 101 from the first power supply 110 to the second power supply 120 for supplying power, so as to ensure normal operation of the load 101. In one embodiment, as shown in fig. 2, the load 101 comprises a rectifying unit. The rectifying unit can ensure that the power supply voltage provided by the first power supply 110 or the second power supply 120 can stably and reliably supply power to the load 101, and ensure the normal operation of the load 101.
It is to be understood that the specific circuit structure of the abnormality detection circuit 200 is not limited as long as it has a function of detecting whether the power supply of the first power supply 110 is normal to determine whether to output a power supply normal signal to the controller 201. In one embodiment, the anomaly detection circuit 200 may include a sampling resistor, an opto-isolator, and a voltage divider resistor. In one embodiment, the abnormality detection circuit 200 may also include a zero-crossing detection circuit, an optical coupler isolator, and a voltage dividing resistor. Specifically, the zero-crossing detection circuit may adopt a conventional zero-crossing detection circuit.
When the emergency power supply protection device 10 of the indoor unit of the multi-split system is in use, whether the power supply mode of the power switching circuit 100 changes or not can be detected in real time through the abnormality detection circuit 200. That is, whether the power supplied by the first power source 110 is normal can be detected in real time by the abnormality detection circuit 200. If the abnormality detection circuit 200 detects that the power supply of the first power source 110 is normal, the abnormality detection circuit 200 outputs a power supply normal signal to the controller 201. If the abnormality detection circuit 200 detects that the power supply of the first power supply 110 is abnormal (such as under-voltage) or power-off, the abnormality detection circuit 200 does not output a power supply normal signal to the controller 201.
Specifically, when the power supply of the first power supply 110 is abnormal or is powered off, the front end of the abnormality detection circuit 200 (i.e., the end electrically connected to the fourth end of the power switching circuit 100) cannot detect a voltage input, and the power supply normal signal output by the abnormality detection circuit 200 is interrupted. Meanwhile, if the controller 201 cannot receive the power supply normal signal, the controller 201 sends a current operation instruction of the load 101 to the multi-split system to report the current operation mode of the load 101, so that the multi-split system is prevented from having an internal machine missing fault, and the operation reliability of the multi-split system is improved.
In one embodiment, the electronic expansion valves of the multiple on-line system node unit set are all provided with an automatic power-off function. When the first power source 110 is powered off, the electronic expansion valves corresponding to the non-VIP units may automatically rebound to close, thereby avoiding affecting the refrigeration requirements of the VIP units or causing water condensation in the condensers of the non-VIP units.
In this embodiment, when the first power supply 110 is powered off or power supply abnormality occurs, the power switching circuit 100 can automatically switch the power supply mode of the load from the first power supply 110 to the second power supply 120. Meanwhile, the abnormality detection circuit 200 may detect whether the power supplied by the first power source 110 is normal in real time to determine whether a power supply normal signal is output to the controller 201, so as to report the current operation mode of the load 101 to the multi-split system through the controller 201. In this embodiment, the power switching circuit 100 is matched with the abnormality detection circuit 200, so that not only can the normal operation of the load 101 be ensured, and data loss be avoided, but also an internal machine missing fault of the multi-online system can be avoided, and the reliability of the operation of the multi-online system can be improved.
Referring to fig. 3, in one embodiment, the power switching circuit 100 includes: and a relay 130. The first terminal of the switch of the relay 130 is used to electrically connect the first terminal of the first power source 110. A second terminal of the relay 130 switch is electrically connected to the second power source 120. The third terminal and the fourth terminal of the relay 130 switch are electrically connected to the load 101. A first terminal of the coil of the relay 130 is commonly connected to a second terminal of the first power source 110 and a first terminal of the abnormality detection circuit 200. A second end of the coil of the relay 130 is electrically connected to a second end of the abnormality detection circuit 200. The relay 130 is used for switching the first power source 110 or the second power source 120 to supply power to the load 101.
When the first power supply 110 supplies power normally, the relay 130 is attracted to the normally open contact due to the action of the coil of the relay 130. At this time, the first power source 110, the relay 130 switch and the load 101 form a loop, that is, the first power source 110 supplies power to the load 101. When the first power supply 110 is powered abnormally or is powered off, the coil of the relay 130 does not control the switch of the relay 130 to be attracted to the normally open contact, and at the moment, the switch of the relay 130 is automatically switched to the normally closed contact. That is, the second power source 120, the relay 130 switch and the load 101 form a loop, and the second power source 120 supplies power to the load 101. In this embodiment, the relay 130 can implement seamless switching between the first power source 110 and the second power source 120, so as to ensure normal operation of the load 101.
In one embodiment, the anomaly detection circuit 200 includes: a sampling circuit 210 and an opto-isolator circuit 220. A first terminal of the sampling circuit 210 is electrically connected to a first terminal of the coil of the relay 130. A second terminal of the sampling circuit 210 is electrically connected to a second terminal of the coil of the relay 130. A first end of the optical coupler isolation circuit 220 is electrically connected to a first end of the sampling circuit 210. A second end of the optical coupler isolation circuit 220 is electrically connected to a second end of the sampling circuit 210. The third end of the optical coupler isolation circuit 220 is used for being electrically connected with a third power supply 221. The fourth end of the optical coupling isolation circuit 220 is electrically connected with the controller 201. The optical coupler isolation circuit 220 is configured to determine whether to output the power supply normal signal to the controller 201 according to whether the power supply of the first power source 110 is normal.
In one embodiment, the sampling circuit 210 may be a sampling resistor. In one embodiment, the optical coupling isolation circuit 220 may be an optical coupling isolator. When the first power source 110 supplies power normally, the optical coupler isolator may be turned on according to a set frequency (e.g., 50Hz), and a secondary of the optical coupler isolator may output a high level signal of 50Hz to the controller 201. Namely, the power supply normal signal received by the controller 201 is a high level signal of 50Hz at this time. In one embodiment, the third power supply 221 is a trigger power supply of the optical coupler isolation circuit 220.
When the first power supply 110 is powered abnormally or is powered off, the two ends of the sampling circuit 210 cannot be divided into voltages, and at the moment, a 50Hz high-level signal output by the secondary side of the optical coupler isolator is interrupted. That is, at this time, the controller 201 cannot receive the power supply normal signal, the controller 201 sends the current operation instruction of the load 101 to the multi-split system, so as to report the current operation mode of the load 101, thereby avoiding an internal machine missing fault of the multi-split system, and improving the reliability of the operation of the multi-split system.
In one embodiment, the anomaly detection circuit 200 further comprises: a voltage divider circuit 230. The first end of the voltage dividing circuit 230 is connected to the first end of the sampling circuit 210 and the first end of the optical coupler isolation circuit 220. A second terminal of the voltage dividing circuit 230 is electrically connected to a second terminal of the coil of the relay 130. In one embodiment, the voltage divider circuit 230 may be a voltage divider resistor. The optical coupling isolation circuit 220 is protected by the voltage division circuit 230, and the optical coupling isolation circuit 220 is prevented from being damaged.
In one embodiment, the anomaly detection circuit 200 further comprises: a current limiting circuit 240. A first end of the current limiting circuit 240 is electrically connected to a fourth end of the optical coupler isolation circuit 220. A second terminal of the current limiting circuit 240 is connected to ground. In one embodiment, the current limiting circuit 240 may be a current limiting resistor. The current limiting resistor can prevent the signal output by the optical coupling isolation circuit 220 from damaging the controller 201.
Referring to fig. 4, in one embodiment, the anomaly detection circuit 200 includes: transformer coupling circuit 250. The first terminal of the transformer coupling circuit 250 is used to electrically connect the first power source 110. A second terminal of the transformer coupling circuit 250 is electrically connected to a second terminal of the coil of the relay 130. The third terminal of the transformer coupling circuit 250 is used for electrically connecting to the third power supply 221. The fourth terminal of the transformer coupling circuit 250 is electrically connected to the controller 201. The transformer coupling circuit 250 is configured to determine whether to output the power supply normal signal to the controller 201 according to whether the power supply of the first power source 110 is normal.
In one embodiment, the specific circuit structure of the transformer coupling circuit 250 is not limited as long as it has a function of determining whether to output the power supply normal signal to the controller 201 according to whether the power supply of the first power source 110 is normal. In one embodiment, the transformer coupling circuit 250 may be a coupling transformer. In one embodiment, the transformer coupling circuit 250 may also be other coupling circuits having a function of determining whether to output the power supply normal signal according to whether the power supply of the first power source 110 is normal.
When the first power source 110 supplies power normally, the transformer coupling circuit 250 may obtain the voltage across the coil of the relay 130, that is, at this time, the transformer coupling circuit 250 may output the power supply normal signal to the controller 201 normally. When the first power source 110 is powered abnormally or is powered off, the transformer coupling circuit 250 does not obtain the voltage across the coil of the relay 130, and at this time, the power supply normal signal is not output to the controller 201.
Referring to fig. 5, in one embodiment, the anomaly detection circuit 200 further includes: a voltage divider circuit 230. The voltage divider circuit 230 is connected in series between the second terminal of the coil of the relay 130 and the second terminal of the transformer coupling circuit 250. In one embodiment, the voltage divider circuit 230 may be a voltage divider resistor. The voltage dividing circuit 230 protects the transformer coupling circuit 250 and prevents the transformer coupling circuit 250 from being damaged.
In one embodiment, the anomaly detection circuit 200 further comprises: a sampling circuit 210. A first terminal of the sampling circuit 210 is coupled to a first terminal of the coil of the relay 130 and a first terminal of the transformer coupling circuit 250. A second terminal of the sampling circuit 210 is connected to a second terminal of the coil of the relay 130 and a second terminal of the transformer coupling circuit 250. In an embodiment, the sampling circuit 210 may adopt the circuit topology described in the above embodiments, and is not described herein again.
In one embodiment, the sampling circuit 210 includes: the first resistor 211. A first end of the first resistor 211 is electrically connected to a first end of the coil of the relay 130. A second terminal of the first resistor 211 is electrically connected to a second terminal of the coil of the relay 130. The voltage across the coil of the relay 130 is collected through the first resistor 211 to determine whether the power supply of the first power source 110 is normal.
In one embodiment, the voltage divider circuit 230 includes: and a second resistor 231. A first end of the second resistor 231 is electrically connected to a first end of the optical coupler and isolator circuit 220 or a second end of the transformer coupling circuit 250. A second end of the second resistor 231 is electrically connected to a second end of the coil of the relay 130. The optical coupler isolation circuit 220 or the transformer coupling circuit 250 is protected by the second resistor 231, and the two are prevented from being damaged due to overlarge voltage.
In summary, in the present application, when the first power supply 110 is powered off or power supply abnormality occurs, the power switching circuit 100 can automatically switch the power supply mode of the load from the first power supply 110 to the second power supply 120. Meanwhile, the abnormality detection circuit 200 may detect whether the power supplied by the first power source 110 is normal in real time to determine whether a power supply normal signal is output to the controller 201, so as to report the current operation mode of the load 101 to the multi-split system through the controller 201. This application passes through power supply switching circuit 100 with unusual detection circuitry 200 cooperation not only can guarantee load 101's normal operating, avoids data loss, can also avoid the many online systems to appear the interior machine disappearance trouble, improves the reliability of many online systems operation.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a multi-split system indoor set emergency power supply protection device which characterized in that includes:
the first end of the power supply switching circuit is used for being electrically connected with a first power supply, the second end of the power supply switching circuit is electrically connected with a second power supply, and the third end of the power supply switching circuit is used for being electrically connected with a load and switching the first power supply or the second power supply to supply power to the load; and
and the abnormity detection circuit is electrically connected with the fourth end of the power supply switching circuit and is used for detecting whether the power supply of the first power supply is normal or not so as to determine whether a power supply normal signal is output to the controller or not.
2. The emergency power supply protection device for the indoor unit of the multi-split system as claimed in claim 1, wherein if the abnormality detection circuit detects that the power supply of the first power supply is abnormal or fails, the abnormality detection circuit does not output the power supply normal signal to the controller;
if the abnormality detection circuit detects that the first power supply is normal in power supply, the abnormality detection circuit outputs the power supply normal signal to the controller.
3. The emergency power supply protection device for the indoor unit of a multi-split air conditioning system as claimed in claim 1, wherein the power switching circuit comprises:
a first end of the relay switch is used for being electrically connected with a first end of the first power supply, a second end of the relay switch is electrically connected with the second power supply, a third end and a fourth end of the relay switch are both electrically connected with the load, a first end of the relay coil is connected with a second end of the first power supply and a first end of the abnormality detection circuit in a common mode, and a second end of the relay coil is electrically connected with a second end of the abnormality detection circuit;
the relay is used for switching the first power supply or the second power supply to supply power to the load.
4. The emergency power supply protection device of the indoor unit of a multi-split system as claimed in claim 3, wherein the abnormality detection circuit comprises:
a first end of the sampling circuit is electrically connected with a first end of the relay coil, and a second end of the sampling circuit is electrically connected with a second end of the relay coil; and
the optical coupling isolation circuit comprises an optical coupling isolation circuit, wherein a first end of the optical coupling isolation circuit is electrically connected with a first end of the sampling circuit, a second end of the optical coupling isolation circuit is electrically connected with a second end of the sampling circuit, a third end of the optical coupling isolation circuit is used for electrically connecting a third power supply, a fourth end of the optical coupling isolation circuit is electrically connected with the controller and used for determining whether to output a power supply normal signal to the controller according to whether the power supply of the first power supply is normal or not.
5. The emergency power supply protection device for the indoor unit of a multi-split system as claimed in claim 4, wherein the abnormality detection circuit further comprises:
and the first end of the voltage division circuit is connected with the first end of the sampling circuit and the first end of the optical coupling isolation circuit in a common mode, and the second end of the voltage division circuit is electrically connected with the second end of the relay coil.
6. The emergency power supply protection device for the indoor unit of a multi-split system as claimed in claim 4, wherein the abnormality detection circuit further comprises:
and the first end of the current limiting circuit is electrically connected with the fourth end of the optical coupling isolation circuit, and the second end of the current limiting circuit is grounded.
7. The emergency power supply protection device of an indoor unit of a multi-split system as claimed in claim 3, wherein the abnormality detection circuit comprises:
the first end of the transformer coupling circuit is used for being electrically connected with the first power supply, the second end of the transformer coupling circuit is electrically connected with the second end of the relay coil, the third end of the transformer coupling circuit is used for being electrically connected with a third power supply, and the fourth end of the transformer coupling circuit is electrically connected with the controller and used for determining whether to output the power supply normal signal to the controller according to whether the power supply of the first power supply is normal or not.
8. The emergency power supply protection device of an indoor unit of a multi-split system as claimed in claim 7, wherein the abnormality detection circuit further comprises:
and the voltage division circuit is connected between the second end of the relay coil and the second end of the transformer coupling circuit in series.
9. The emergency power supply protection device of an indoor unit of a multi-split system as claimed in claim 7, wherein the abnormality detection circuit further comprises:
and the first end of the sampling circuit is connected with the first end of the relay coil and the first end of the transformer coupling circuit in a sharing mode, and the second end of the sampling circuit is connected with the second end of the relay coil and the second end of the transformer coupling circuit in a sharing mode.
10. The emergency power supply protection device for the indoor unit of a multi-split system as claimed in claim 4 or 9, wherein the sampling circuit comprises:
and a first end of the first resistor is electrically connected with the first end of the relay coil, and a second end of the first resistor is electrically connected with the second end of the relay coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169701.3A CN111174391A (en) | 2020-03-12 | 2020-03-12 | Emergency power supply protection device for indoor unit of multi-split system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169701.3A CN111174391A (en) | 2020-03-12 | 2020-03-12 | Emergency power supply protection device for indoor unit of multi-split system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111174391A true CN111174391A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010169701.3A Pending CN111174391A (en) | 2020-03-12 | 2020-03-12 | Emergency power supply protection device for indoor unit of multi-split system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112290545A (en) * | 2020-10-21 | 2021-01-29 | 珠海格力电器股份有限公司 | Power supply control device and method and multi-split air conditioning system |
| CN113091220A (en) * | 2021-03-08 | 2021-07-09 | 珠海格力电器股份有限公司 | Multi-split system and power consumption determination method and device thereof, storage medium and processor |
| CN113241841A (en) * | 2021-05-25 | 2021-08-10 | 郑州海王实业有限公司 | Power distribution circuit |
| CN113531790A (en) * | 2021-06-09 | 2021-10-22 | 青岛海信日立空调系统有限公司 | Communication control circuit, multi-connected air conditioner and control method |
| CN113574335A (en) * | 2019-03-19 | 2021-10-29 | 大金工业株式会社 | Refrigerant cycle system |
| CN115179984A (en) * | 2022-08-04 | 2022-10-14 | 上海科泰运输制冷设备有限公司 | Air conditioner control device, method and circuit system |
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2020
- 2020-03-12 CN CN202010169701.3A patent/CN111174391A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113574335A (en) * | 2019-03-19 | 2021-10-29 | 大金工业株式会社 | Refrigerant cycle system |
| CN113574335B (en) * | 2019-03-19 | 2023-07-07 | 大金工业株式会社 | Refrigerant circulation system |
| CN112290545A (en) * | 2020-10-21 | 2021-01-29 | 珠海格力电器股份有限公司 | Power supply control device and method and multi-split air conditioning system |
| CN113091220A (en) * | 2021-03-08 | 2021-07-09 | 珠海格力电器股份有限公司 | Multi-split system and power consumption determination method and device thereof, storage medium and processor |
| CN113241841A (en) * | 2021-05-25 | 2021-08-10 | 郑州海王实业有限公司 | Power distribution circuit |
| CN113241841B (en) * | 2021-05-25 | 2023-04-07 | 郑州海王实业有限公司 | Power distribution circuit |
| CN113531790A (en) * | 2021-06-09 | 2021-10-22 | 青岛海信日立空调系统有限公司 | Communication control circuit, multi-connected air conditioner and control method |
| CN115179984A (en) * | 2022-08-04 | 2022-10-14 | 上海科泰运输制冷设备有限公司 | Air conditioner control device, method and circuit system |
| CN115179984B (en) * | 2022-08-04 | 2024-03-12 | 上海科泰运输制冷设备有限公司 | Air conditioner control device, method and circuit system |
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