Dual-control hot backup system of air conditioning equipment

Abstract

The utility model discloses a hot backup system for double control systems of air conditioning equipment, which comprises a sensor system, a signal distributor, a control system I, a control system II, a human-computer interface, a control optimization device, an intermediate relay, an alternating current contactor, a load, an indicator lamp and an emergency starting strong control device, information of the sensor system is provided for the first control system and the second control system through the signal distributor at the same time, the first control system and the second control system work at the same time, communicate with each other and jointly output control signals to the control optimization device, and the control optimization device controls a coil of the intermediate relay to work after selecting input signals. An intermediate relay contact controls an AC contactor and an indicating lamp to act, and the AC contactor controls loads such as a compressor fan to work. The first control system and the second control system work at the same time, under the condition that any control system breaks down, the air conditioner equipment completes control system switching without shutdown, and the equipment can continuously work under the condition that a single control system breaks down.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning equipment control systems, and particularly to a dual-control hot backup system for air-conditioning equipment. Background Art

[0002] With the research and development of various equipment such as radars and lasers, more and more requirements are imposed on air-conditioning equipment, and the reliability requirements for air conditioners are also increasing. The control system of air-conditioning equipment directly affects the reliability of air conditioners. Conventional air conditioners generally have only one set of control equipment without backup, or have a dual-control system that switches to the backup control system when one control system fails. The problem with a single control system is that the air-conditioning equipment cannot operate normally when the control system fails, resulting in the shutdown of the customer's equipment. The problems with ordinary dual-control systems are that a series of operations such as stopping the customer's equipment, stopping the air-conditioning equipment, switching the control system, restarting the air-conditioning equipment, and restarting the customer's equipment are inevitably required during the switching process. Therefore, the existing dual-control systems have the problem that the air-conditioning equipment will stop during the switching process. Content of the Utility Model

[0003] The utility model provides a dual-control hot backup system for air-conditioning equipment to solve the problem that the air conditioner will stop during the switching of the control system in the air-conditioning equipment with the existing dual-control system.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A dual-control hot backup system for air-conditioning equipment includes a control system one, a control system two, and an air-conditioning control device for controlling the operation of loads in the air conditioner. The control system one and the control system two work simultaneously, and also include a control optimizer. The control system one and the control system two are both connected to the control optimizer. The control system one and the control system two simultaneously output the normal working state signal and the output signal of the control system to the control optimizer. The control optimizer preferentially selects the signal of the control system one and automatically switches to the signal of the control system two when the control system one fails, and then controls the loads in the air conditioner to operate through the air-conditioning control device.

[0006] Further, the control system one and the control system two are connected to the sensors in the air conditioner through the same signal distributor, and the signal distributor simultaneously distributes the signals of the sensors in the air conditioner to the control system one and the control system two.

[0007] Further, it also includes a human-machine interface. The human-machine interface is respectively connected to the control system one and the control system two, and the instructions generated by the human-machine interface are simultaneously transmitted to the control system one and the control system two.

[0008] Further, the control system one and the control system two communicate with each other.

[0009] Further, it further includes an emergency start-up forced control device, which is connected to the control selector. The signal of the emergency start-up forced control device has a high priority.

[0010] Further, the control system one, the control system two and the emergency start-up forced control device output status signals.

[0011] Compared with the prior art, the advantages of the present utility model are as follows:

[0012] 1. The two control systems work simultaneously and output the working status signals of the control systems at the same time. The control signals (such as the control signals for each load) are output through the control selector. Since the power of the control systems is relatively low, the overall power consumption of the machine increases slightly and the reliability of the whole machine is greatly improved.

[0013] 2. The two control systems work simultaneously. The control signals are selected through the control selector. When a single control system fails, it automatically switches to the standby control system, and the whole machine does not need to stop, avoiding the problem that other types of backup systems need the unit to stop and restart.

[0014] 3. The two control systems share the sensor system, signal distributor, human-machine interface, control selector, intermediate relay, AC contactor, each load such as compressor fan, indicator light, etc., which can greatly reduce the cost.

[0015] 4. In the case where both control systems fail simultaneously, it can be switched to the emergency start-up forced control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 is the connection diagram of the control system one, the control system two, the emergency start-up forced control device and the control selector in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0019] Refer to Figure 1 , the electrical principle block diagram of a dual-control system hot backup system for an air-conditioning device, which includes a sensor system 1, a signal distributor 2, a control system one 3, a control system two 4, a human-machine interface 5, a control selector 6, an intermediate relay 8, an AC contactor 10, each load such as a compressor fan 11, an indicator light 9, an emergency start-up forced control device 7, etc.

[0020] In this utility model, the sensor system 1 is distributed at various positions of the air-conditioning equipment to collect sensor signals from all paths and connect them to the signal distributor 2. The signal distributor 2 is simultaneously connected to the control system 3 and the control system 4. The control system 3 and the control system 4 are connected to each other, work simultaneously, and communicate with each other. At the same time, they output control signals to the control optimizer 6. To prevent accidents, an emergency start-up forced control device 7 is also connected to the control optimizer 6. After the control optimizer 6 selects the input signal, it controls the operation of the coil of the intermediate relay 8. The contacts of the intermediate relay 8 control the actions of the AC contactor 10 and the indicator light 9. The AC contactor 8 controls the operation of loads such as the compressor and the fan 11.

[0021] The sensor system 1, the signal distributor 2, the control system 3, the human-machine interface 5, the control optimizer 6, the intermediate relay 8, the AC contactor 10, all loads such as the compressor and the fan 11 in each path, and the indicator light 9 form a control loop.

[0022] The sensor system 1, the signal distributor 2, the control system 4, the human-machine interface 5, the control optimizer 6, the intermediate relay 8, the AC contactor 10, all loads such as the compressor and the fan 11 in each path, and the indicator light 9 form a control loop.

[0023] The emergency start-up forced control device 7, the control optimizer 8, the intermediate relay 8, the AC contactor 10, all loads such as the compressor and the fan 11 in each path, and the indicator light 9 form a control loop.

[0024] The control system 3, the control system 4, and the emergency start-up forced control device 7 can each independently form a control system.

[0025] See Figure 2 , the simplified connection diagram of the control system 1, the control system 2, the emergency start-up forced control device, and the control optimizer. The control system 1, the control system 2, and the emergency start-up forced control device simultaneously output working state signals and output signals to the control optimizer. When working normally, they output normal working state signals. When there is a fault, they stop outputting working state signals. The control optimizer selects the control signals of the three control systems according to the working state signals of the control system 1, the control system 2, and the emergency start-up forced control device.

[0026] The following further describes the present utility model in conjunction with the accompanying drawings:

[0027] When the control system of the air-conditioning equipment is normal, the control system 1 and the control system 2 work simultaneously and communicate with each other, and output control signals to the control optimizer 6 at the same time. In the case of a failure of the control system 1, the control system 2 continues to work, enabling the air-conditioning equipment to complete the control system switching without shutting down, so that the equipment can continue to work in the case of a single control system failure. In the case of simultaneous failures of the two control systems, it can be switched to the emergency start-up forced control device 7, and the emergency start-up forced control device 7 outputs a control signal to the control optimizer 6, and the control optimizer 6 controls the operation of the intermediate relay 8, the AC contactor 10, etc.

[0028] The sensor system 1 is distributed at various positions of the air-conditioning equipment, collects sensor signals from all channels, and is connected to the signal distributor 2. The signal distributor 2 is simultaneously connected to the control system 1 and the control system 2. The control system 1 and the control system 2 are interconnected, work simultaneously and communicate with each other. The control system 1 and the control system 2 are data-interconnected with the human-machine interface 5. The human-machine interface 5 displays system parameters and working status and can perform human-machine interaction operations. After program judgment, the control system 1 and the control system 2 output control signals to the control optimizer 6. Since the two receive the same sensor information and have the same control status, the output signals are also the same. When a single control system fails and loses power, because the other control system outputs normally, the control system of the entire air-conditioning system does not need to shut down and continues to operate. The control optimizer 6 screens the control signals to control the energization of the coil of the intermediate relay 8. The intermediate relay 8 controls the energization of the indicator light 9 and the coil of the AC contactor 10. After the coil of the AC contactor 10 is energized, various loads 11 such as the compressor and the fan are energized and work.

[0029] To prevent accidents, an emergency start-up forced control device 7 is also connected to the control optimizer 6. After the control optimizer 6 selects the input signal, it controls the operation of the coil of the intermediate relay 8. The contacts of the intermediate relay 8 control the actions of the AC contactor 10 and the indicator light 9. The AC contactor 8 controls the operation of loads 11 such as the compressor and the fan.

[0030] See Figure 2, Simplified connection diagram of Control System 1, Control System 2, Emergency Start Forced Control Device and Control Optimizer. Control System 1, Control System 2, and Emergency Start Forced Control Device simultaneously output working status signals and output signals to the Control Optimizer. When working normally, it outputs a normal working status signal, and stops outputting the working status signal in case of a fault. The normal signal of Control System 1 is input to the K1 coil in the Control Optimizer, and the output signal n of Control System 1 is input to the normally open contact of K1. The normal signal of Control System 2 is input to the K2 coil of the Control Optimizer through the normally closed contact of K1, and the output signal n of Control System 1 is input to the normally open contact of K2. When Control System 1 is working normally, the K1 relay is energized, and at the same time, the power supply to the coil of the K2 relay is disconnected. The normally open contact of K1 closes, and the normally open contact of K2 opens. The Control Optimizer selects and outputs the output signal of Control System 1. When Control System 1 fails and cannot output the normal signal of Control System 1, the coil of the K1 relay is de-energized, the normally closed contact of K1 closes, the coil of the K2 relay is energized, the normally open contact of K2 closes, and the Control Optimizer selects and outputs the output signal of Control System 2. Similarly, the emergency start forced control working signal is output to the relay Kn1. The normal signal of Control System 1 and the normal signal of Control System 2 are connected in parallel through the normally open contact of K1 and the normally open contact of K2, and are input to the Kn2 relay as the normal signal of the control system through the normally closed contact of Kn1. The emergency start forced control output signal n is input to the normally open contact of the Kn1 relay, and the optimized output signals selected by Control System 1 and Control System 2 are input to the normally open contact of Kn2. When the emergency start forced control working signal is started, the Kn1 relay is energized, the coil of the Kn2 relay is disconnected, the normally open contact of Kn1 closes, and the Control Optimizer selects and outputs the emergency start forced control output signal. When the emergency start forced control device does not output the emergency start signal, the coil of the Kn1 relay is de-energized, the normally closed contact of the Kn1 relay closes, the coil of the Kn2 relay is energized and closes, and the Control Optimizer outputs the optimized output signals selected by Control System 1 and Control System 2.

[0031] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. The embodiments described in the present invention are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. In the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. As long as such a combination does not violate the idea of the present invention, it should also be regarded as the content disclosed in the present disclosure. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0032] The present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model and without departing from the design concept of the present utility model, various modifications and improvements made by those skilled in the art to the technical solution of the present utility model shall fall within the protection scope of the present utility model. The technical content claimed by the present utility model has been fully recorded in the claims.

Claims

1. A dual-control hot standby system for an air-conditioning device, comprising a control system one, a control system two, and an air-conditioning control device for controlling the operation of a load in the air conditioner, characterized in that, The control system one and the control system two work simultaneously, and further include a control selector. Both the control system one and the control system two are connected to the control selector. The control system one and the control system two simultaneously output the normal working state signal and the output signal of the control system to the control selector. The control selector preferentially selects the signal of the control system one and automatically switches to the signal of the control system two when the control system one fails, and then controls the load in the air conditioner to work through the air conditioner control device.

2. The dual-control hot backup system for an air-conditioning device according to claim 1, wherein, The control system one and the control system two are connected to the sensors in the air conditioner through the same signal distributor, and the signal distributor distributes the signals of the sensors in the air conditioner to the control system one and the control system two simultaneously.

3. The dual-control hot standby system for an air conditioning device according to claim 1, wherein It further includes a human-machine interface. The human-machine interface is respectively connected to the control system one and the control system two, and the instructions generated by the human-machine interface are simultaneously transmitted to the control system one and the control system two.

4. A dual-control hot standby system for an air conditioning device according to claim 1, wherein The control system one and the control system two communicate with each other.

5. The dual-control hot standby system for an air-conditioning device according to claim 1, characterized in that It further includes an emergency start-up forced control device. The emergency start-up forced control device is connected to the control selector, and the signal of the emergency start-up forced control device has a high priority.

6. The dual-control hot backup system for an air-conditioning device according to claim 5, characterized in that The control system one, the control system two and the emergency start-up forced control device output status signals.

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