CN115179984B - Air conditioner control device, method and circuit system - Google Patents
Air conditioner control device, method and circuit system Download PDFInfo
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- CN115179984B CN115179984B CN202210931149.6A CN202210931149A CN115179984B CN 115179984 B CN115179984 B CN 115179984B CN 202210931149 A CN202210931149 A CN 202210931149A CN 115179984 B CN115179984 B CN 115179984B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 99
- 230000009471 action Effects 0.000 claims description 20
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 description 12
- 238000009423 ventilation Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
Abstract
The application relates to an air conditioner control device, an air conditioner control method and a circuit system, wherein the air conditioner control device comprises the following components: the detection circuit is used for detecting whether the main power supply loses power or not; the control circuit is used for entering a working state when the detection circuit detects that the main power supply is in power failure so as to drive the driving circuit of the air conditioner and control the air conditioner to switch the air door; and the power supply switching circuit is used for switching the power supply of the air conditioner into an emergency power supply after the control circuit enters a working state, and controlling the inverter circuit between the emergency power supply and the air conditioner to enter into work so as to enable the air conditioner to work. According to the technical scheme, the potential control failure defect of the software controller can be avoided, so that the control reliability is improved, and the life safety of passengers is guaranteed.
Description
Technical Field
The invention relates to the technical field of air conditioner control in rail transit, in particular to an air conditioner control device, an air conditioner control method and an air conditioner control circuit system.
Background
The rail transit air conditioning system is a mechanical-electrical integrated system combining software and hardware. In rail transit air conditioning systems, an emergency ventilation system is critical and is the last barrier to ensure ventilation in the passenger compartment. In some scenarios, the main power supply (ac power supply) fails and the emergency ventilation system will be enabled.
The inventors of the present application have found in research that prior art control of emergency ventilation system activation is based on a controller. The controller is usually switched to enable the emergency ventilation system in the form of a software program, however, the controller can cause unreliable control and even lose control capability due to unstable factors, especially program loopholes and the like, and seriously affects the life health of passengers.
Disclosure of Invention
The embodiment of the invention provides an air conditioner control device, an air conditioner control method and an air conditioner control circuit system, which adopt a hardware circuit mode to detect faults of a main power supply and control switching actions of a ventilation device, so that potential control failure defects of a software controller can be avoided, the control reliability is improved, and the life safety of passengers is ensured.
In a first aspect, the present application provides an air conditioner control device, including:
the detection circuit is used for detecting whether the main power supply loses power or not;
the control circuit is used for entering a working state when the detection circuit detects that the main power supply is in power failure so as to drive the driving circuit of the air conditioner and control the air conditioner to switch the air door;
and the power supply switching circuit is used for switching the power supply of the air conditioner into an emergency power supply after the control circuit enters a working state, and controlling the inverter circuit between the emergency power supply and the air conditioner to enter into work so as to enable the air conditioner to work.
With reference to the first aspect, in a possible implementation manner, the detection circuit detects whether the main power supply is powered down through a three-phase detection relay;
the detection coil of the three-phase detection relay is connected to the power signal line of the main power supply, and the normally closed switch of the three-phase detection relay is arranged in the control circuit.
With reference to the first aspect, in a possible implementation manner, the control circuit includes a primary control circuit and a secondary control circuit;
the normally closed switch of the three-phase detection relay is arranged in the primary control circuit;
the primary control circuit is also connected in series with a detection coil of a first intermediate relay, and a normally open switch of the first intermediate relay is arranged in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works;
the secondary control circuit is also connected with a detection coil of at least one second intermediate relay, and the normally open and normally closed switches corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open and normally closed switches are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of the air door.
With reference to the first aspect, in a possible implementation manner, the normally open switch of the first intermediate relay is further disposed in the power switching circuit, and after the primary control circuit works, the power switching circuit is electrified to work;
the power supply switching circuit is also connected with a detection coil of a first time relay, and after the detection coil of the first time relay is electrified, the contactor between the emergency power supply and the at least one group of air conditioners is controlled to work in an electrified mode;
the power supply switching circuit is also connected with a detection coil of a second time relay, a normally open switch of the second time relay is arranged in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified.
With reference to the first aspect, in a possible implementation manner, the time delay of the second time relay is greater than the time delay of the first time relay.
With reference to the first aspect, in a possible implementation manner, the detection circuit further detects, through a third intermediate relay, a control instruction of the controller to start the air conditioner;
the detection coil of the third intermediate relay is connected to the control signal line of the controller, and the normally open switch of the third intermediate relay is connected in series in the primary control circuit.
In a second aspect, the present application provides an air conditioner control method, including:
the detection circuit detects whether the main power supply is powered off;
when the main power supply is detected to be powered off, the control circuit is enabled to enter a working state, the driving circuit of the air conditioner is driven, and the air conditioner is controlled to switch the air door;
and enabling a power supply switching circuit to work, switching a power supply of the air conditioner into an emergency power supply, and controlling an inverter circuit between the emergency power supply and the air conditioner to work so as to enable the air conditioner to work.
With reference to the second aspect, in a possible implementation manner, the detecting circuit detects whether the main power supply is powered down, including: and detecting whether the main power supply loses power or not through a three-phase detection relay.
With reference to the second aspect, in a possible implementation manner, the control circuit includes a primary control circuit and a secondary control circuit;
the normally closed switch of the three-phase detection relay is arranged in the primary control circuit;
the primary control circuit is also connected in series with a detection coil of a first intermediate relay, and a normally open switch of the first intermediate relay is arranged in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works;
the secondary control circuit is also connected with a detection coil of at least one second intermediate relay, and the normally open and normally closed switches corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open and normally closed switches are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of the air door.
With reference to the second aspect, in a possible implementation manner, the normally open switch of the first intermediate relay is further disposed in the power switching circuit, and after the primary control circuit works, the power switching circuit is electrified to work;
the power supply switching circuit is also connected with a detection coil of a first time relay, and after the detection coil of the first time relay is electrified, the contactor between the emergency power supply and the at least one group of air conditioners is controlled to work in an electrified mode;
the power supply switching circuit is also connected with a detection coil of a second time relay, a normally open switch of the second time relay is arranged in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified.
With reference to the second aspect, in a possible implementation manner, the time delay of the second time relay is greater than the time delay of the first time relay.
In a third aspect, the present application provides a circuit system comprising: the system comprises a main power supply, an emergency power supply, an inverter circuit, at least one group of air conditioners and corresponding driving circuits, a software controller and a hardware circuit control circuit; the hardware circuit control circuit is the air conditioner control device according to the first aspect;
the main power supply is used for supplying power to the at least one group of air conditioners under normal conditions;
the emergency power supply is used for supplying power to the driving circuit, the software controller and the hardware circuit control circuit through the inverter circuit under emergency;
the software controller is used for sending a starting control instruction to the at least one group of air conditioners; the hardware circuit control circuit is also used for detecting the starting control instruction.
The utility model provides an air conditioner controlling means, detect whether the power failure of main power supply through detection circuit, when the main power supply loses power, control circuit gets into operating condition, drive air conditioner's drive circuit, control air conditioner carries out the switching action of air door, power supply switching circuit is the emergency power supply with the power supply of air conditioner after control circuit carries out work, and control inverter circuit between emergency power supply and the air conditioner carries out work, thereby control air conditioner work, each partial circuit in this air conditioner controlling means is mutually independent, and be independent of traditional software controller, adopt the form of hardware circuit to detect the trouble of main power supply, and control ventilation unit's switching action, can avoid the potential control failure defect of software controller, thereby improve the reliability of control, guarantee passenger's life safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a block diagram of circuitry in one embodiment of the present application;
fig. 2 is a functional block diagram of an air conditioner control device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a part of a circuit structure of a detection circuit according to an embodiment of the present application;
FIG. 4a is a schematic diagram of a primary control circuit of the control circuit in an embodiment of the present application;
FIG. 4b is a schematic diagram of a secondary control circuit of the control circuit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a part of the structure of a driving circuit in an embodiment of the present application;
FIG. 6 is a schematic diagram of a power switching circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of the structure of an inverter circuit in an embodiment of the present application;
fig. 8 is a flowchart of an air conditioner control method according to an embodiment of the present application.
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe the terminals in the embodiments of the present invention, these terminals should not be limited to these terms. These terms are only used to distinguish terminals from one another. For example, a first terminal may also be referred to as a second terminal, and similarly, a second terminal may also be referred to as a first terminal, without departing from the scope of embodiments of the present invention.
Depending on the context, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to detection". Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
Referring to fig. 1, a circuit system according to an embodiment of the present application is shown.
In this embodiment, the circuitry includes: a main power supply 101, an emergency power supply 102, an inverter circuit 103, at least one set of air conditioners 104 and corresponding driving circuits 105, a software controller 106 and a hardware circuit control circuit 107.
Specifically, the main power source 101 may be an ac power source, for example, the main power source 101 may be a 380V ac power source, which is used to supply power to at least one group of air conditioners 104 under normal conditions (that is, the condition when the main power source 101 is working normally), so that the motor in the air conditioner unit can operate effectively.
The emergency power supply 102 may be a dc power supply, for example, the emergency power supply 102 may be a 110V dc battery, and is configured to supply power to the driving circuit 105, the software controller 106, and the hardware circuit control circuit 107 through the inverter circuit 103 in an emergency (i.e., an abnormal situation of the main power supply 101). Further, the inverter circuit 103 may be connected to a voltage divider circuit, and the voltage divider circuit may be used to obtain a voltage division, for example, 24V dc, to supply power to the driving circuit 105, the software controller 106, and the hardware circuit control circuit 107. In other embodiments, the emergency power source 102 may be an ac power source, and the principles of the emergency power source 102 may be referred to as the principles of the dc power source, which will not be described in detail herein.
The software controller 106 may be, for example, various control chips having program storage and operation functions, such as CPU, DSP, FPGA, etc., and may control the air conditioner 104 and the driving circuit 105 in a normal case. The driving circuit 105 is configured to drive the damper to perform the switching operation of the damper. The general situation is especially that the main power supply 101 works normally, and the software controller 106 does not generate software program abnormality.
The software controller 106 may control the air conditioner 104 and the driving circuit 105 and may include, for example, but not limited to, starting the air conditioner, stopping the air conditioner, opening the damper, closing the new damper or opening the new damper, closing the damper, and the like.
In the conventional technology, the software controller 106 may also have a function of switching power, for example, when the main power 101 fails, the power is switched to the emergency power 102, and the inverter circuit 103 is started to operate, for example, the main power 101 adopts 380V ac power and the emergency power 102 adopts 110V dc battery, and the inverter circuit 103 is used for converting 110V dc power of the emergency power 102 into ac power to drive the motor of the air conditioner to operate. As discussed in the background, because software controller 106 tends to have unstable factors such as software failures, there may be a potential risk of control failure.
As an improvement of the present application, a hardware circuit control circuit 107 is provided in the circuit system, and it is possible to detect a failure of the main power supply 101 and switch the emergency power supply 102 to operate when the failure is detected. Meanwhile, the hardware circuit control circuit 107 is a pure hardware circuit without a memory chip or a memory module, and does not need to store a computer program, and can perform independent detection and switching control independently of the software controller 106, so as to improve the reliability of control and ensure safety.
The hardware circuit control circuit 107 includes a detection circuit 1071, a control circuit 1072, and a power supply switching circuit 1073.
The detection circuit 1071 is configured to detect whether the main power supply 101 is powered down.
A control circuit 1072, configured to enter an operating state when the detection circuit 1071 detects that the main power supply 101 is powered off, so as to drive the driving circuit 105 of the air conditioner 104, and control the air conditioner 104 to perform a switching action of the damper;
the power switching circuit 1073 is configured to switch the power supply of the air conditioner 104 to the emergency power supply 102 after the control circuit 1072 enters an operating state, and control the inverter circuit 103 between the emergency power supply 102 and the air conditioner 104 to enter operation, so that the air conditioner 104 operates.
In a more detailed embodiment of the present application, the above-described hardware circuit control circuit is specifically described with respect to the air conditioner control device 200 in conjunction with fig. 2 to 7.
As shown in fig. 2, an air conditioner control device is provided in one embodiment of the present application.
The air conditioner control device 200 includes:
a detection circuit 201 for detecting whether the main power supply is powered off;
a control circuit 202, configured to enter a working state when the detection circuit 201 detects that the main power supply is powered off, so as to drive a driving circuit of the air conditioner, and control the air conditioner to perform a switching action of an air door;
the power switching circuit 203 is configured to switch the power supply of the air conditioner to an emergency power supply after the control circuit 202 enters an operating state, and control an inverter circuit between the emergency power supply and the air conditioner to enter operation, so that the air conditioner operates.
In one embodiment of the present application, the detection circuit 201 detects whether the main power supply is powered down through a three-phase detection relay. Specifically, the detection coil of the three-phase detection relay is connected to a power signal line of a main power supply (for example, 380V ac power supply), and the normally closed switch of the three-phase detection relay is arranged in the control circuit. Thus, as shown in fig. 4a, when no current passes through the power signal line of the main power supply, the normally closed switch of the three-phase detection relay is kept closed, and the control circuit 202 is in the energized state. In this embodiment, two sets of air conditioning units are taken as an example, and in fig. 4a, normally closed switches TCR1 and TCR2 are illustrated, wherein TCR1 corresponds to a first set of air conditioning units, TCR2 corresponds to a second set of air conditioning units, and TCR1 and TCR2 are connected in series. When current passes through the power signal line of the main power supply, the normally closed switch TCR1 or TCR2 will be opened, and the control circuit 202 is in a disabled state.
In one embodiment of the present application, the detection circuit 201 may further detect a control command for starting the air conditioner through an intermediate relay, as shown in fig. 3, where a detection coil KA11 of the intermediate relay is disposed in a control signal line, and as shown in fig. 4a, a corresponding normally open switch KA11 is disposed in the control circuit 202, that is, when the detection coil KA11 detects that the control signal line is in an active state, the switch KA11 is closed, and when no control signal is detected, the switch KA11 is kept open.
As shown in fig. 4a and 4b, the control circuit 202 includes a primary control circuit and a secondary control circuit.
Specifically, normally closed switches TCR1 and TCR2 of the three-phase detection relay are disposed in the primary control circuit, the primary control circuit is further connected in series with a detection coil, such as coil KA12, of the first intermediate relay, and a normally open switch, such as switch KA12, of the first intermediate relay is disposed in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works.
The secondary control circuit is also connected with a detection coil of at least one second intermediate relay. For example, two groups of air conditioning units are taken as an example, two second intermediate relays can be arranged, corresponding detection coils KA13 and KA14 are connected in parallel, and the two detection coils are connected into a secondary control circuit. And the normally open and normally closed switches corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open and normally closed switches are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of the air door.
As shown in fig. 5, a driving circuit is schematically shown. In this embodiment, two sets of air conditioning units are taken as an example, including a unit 1 and a unit 2, where each unit includes a return air door and a new air door. Normally closed switches KA13 and KA14 may be provided in the driving circuit of the return door, and normally open switches KA13 and KA14 may be provided in the driving circuit of the new door. Therefore, when the main power supply is abnormal, the normally open switches KA13 and KA14 are switched to be closed, and the normally closed switches KA13 and KA14 are switched to be opened, so that the return air door is closed, the fresh air door is opened, and an emergency ventilation function is provided for the train. And when the main power supply is normal, the air return door keeps working, and the fresh air door is closed.
As shown in fig. 6, the normally open switch KA12 of the first intermediate relay is further provided in the power switching circuit 203, and the power switching circuit is energized to operate after the primary control circuit is operated.
The power switching circuit 203 is further connected with a detection coil KT01 of a first time relay, after the detection coil KT01 of the first time relay is electrified, the contactor between the emergency power supply and the at least one group of air conditioners is controlled to be electrified, specifically, a normally open switch KT01 is closed, and contactors KME11 and KME12 are electrified to work, so that the power supply of the air conditioners is switched to be an emergency power supply.
As shown in fig. 6 and 7, the power switching circuit 203 is further connected with a detection coil KT02 of a second time relay, the normally open switch KT02 of the second time relay is disposed in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified.
In one embodiment of the present application, the time delay of the second time relay is greater than the time delay of the first time relay. For example, the time delay of the first time relay may be 30S, and the time delay of the second time relay may be 60S.
Taking 380V alternating current power supply as a main power supply and 110V direct current storage battery as an emergency power supply as an example, the principle of the air conditioner control device is as follows:
when the detection circuit detects a starting signal and the main power supply is in abnormal power failure, the primary control circuit is electrified to work.
When the primary control circuit is electrified to work, the secondary control circuit is further controlled to be electrified to work. And after the secondary control circuit is electrified to work, the actions of the normally open switch and the normally closed switch of the control driving circuit are switched, so that the switching of the air door is controlled.
Meanwhile, when the primary control circuit is electrified, the control power supply control circuit is electrified, and after the primary control circuit is electrified, the control contactor is conducted after a short time delay, so that the power supply is switched into an emergency power supply. After a longer time delay, the inverter in the control inverter circuit is conducted, so that the emergency power supply can be inverted into an alternating current power supply to drive the motor of the air conditioner to operate.
When the detection circuit detects that the main power supply is powered on, the control circuit is in a failure state, the driving circuit drives the air door to switch again, and the power supply of the air conditioner switches back to the main power supply again.
Above-mentioned air conditioner controlling means that this application provided, detect whether the main power supply loses electricity through detection circuit, when the main power supply loses electricity, control circuit gets into operating condition, drive air conditioner's drive circuit, control air conditioner carries out the switching action of air door, power supply switching circuit is the emergency power supply with the power supply of air conditioner after control circuit carries out work, and control inverter circuit between emergency power supply and the air conditioner carries out work, thereby control air conditioner work, each partial circuit in this air conditioner controlling means is mutually independent, and be independent of traditional software controller, adopt the form of hardware circuit to detect the trouble of main power supply, and control ventilation unit's switching action, can avoid the potential control failure defect of software controller, thereby improve the reliability of control, guarantee passenger's life safety.
Referring to fig. 8, in one embodiment of the present application, there is provided an air conditioner control method, which is applicable to the control device in the above embodiment.
The air conditioner control method in this embodiment includes:
s81, detecting whether the main power supply is powered off or not by a detection circuit;
specifically, the detection circuit 201 detects whether the main power supply is powered down by a three-phase detection relay. Specifically, the detection coil of the three-phase detection relay is connected to a power signal line of a main power supply (for example, 380V ac power supply), and the normally closed switch of the three-phase detection relay is arranged in the control circuit. Thus, as shown in fig. 4a, when no current passes through the power signal line of the main power supply, the normally closed switch of the three-phase detection relay is kept closed, and the control circuit 202 is in the energized state. In this embodiment, two sets of air conditioning units are taken as an example, and in fig. 4a, normally closed switches TCR1 and TCR2 are illustrated, wherein TCR1 corresponds to a first set of air conditioning units, TCR2 corresponds to a second set of air conditioning units, and TCR1 and TCR2 are connected in series. When current passes through the power signal line of the main power supply, the normally closed switch TCR1 or TCR2 will be opened, and the control circuit 202 is in a disabled state.
S82, when the main power supply is detected to be powered off, enabling the control circuit to enter a working state, driving the driving circuit of the air conditioner, and controlling the air conditioner to switch the air door;
specifically, as shown in fig. 4a and 4b, the control circuit 202 includes a primary control circuit and a secondary control circuit.
Specifically, normally closed switches TCR1 and TCR2 of the three-phase detection relay are disposed in the primary control circuit, the primary control circuit is further connected in series with a detection coil, such as coil KA12, of the first intermediate relay, and a normally open switch, such as switch KA12, of the first intermediate relay is disposed in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works.
The secondary control circuit is also connected with a detection coil of at least one second intermediate relay. For example, two groups of air conditioning units are taken as an example, two second intermediate relays can be arranged, corresponding detection coils KA13 and KA14 are connected in parallel, and the two detection coils are connected into a secondary control circuit. And the normally open and normally closed switches corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open and normally closed switches are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of the air door.
As shown in fig. 5, a driving circuit is schematically shown. In this embodiment, two sets of air conditioning units are taken as an example, including a unit 1 and a unit 2, where each unit includes a return air door and a new air door. Normally closed switches KA13 and KA14 may be provided in the driving circuit of the return door, and normally open switches KA13 and KA14 may be provided in the driving circuit of the new door. Therefore, when the main power supply is abnormal, the normally open switches KA13 and KA14 are switched to be closed, and the normally closed switches KA13 and KA14 are switched to be opened, so that the return air door is closed, the fresh air door is opened, and an emergency ventilation function is provided for the train. And when the main power supply is normal, the air return door keeps working, and the fresh air door is closed.
S83, enabling a power supply switching circuit to work, switching a power supply of an air conditioner into an emergency power supply, and controlling an inverter circuit between the emergency power supply and the air conditioner to work so as to enable the air conditioner to work.
Specifically, as shown in fig. 6, the normally open switch KA12 of the first intermediate relay is further disposed in the power switching circuit 203, and after the primary control circuit is operated, the power switching circuit is energized to operate.
The power switching circuit 203 is further connected with a detection coil KT01 of a first time relay, after the detection coil KT01 of the first time relay is electrified, the contactor between the emergency power supply and the at least one group of air conditioners is controlled to be electrified, specifically, a normally open switch KT01 is closed, and contactors KME11 and KME12 are electrified to work, so that the power supply of the air conditioners is switched to be an emergency power supply.
As shown in fig. 6 and 7, the power switching circuit 203 is further connected with a detection coil KT02 of a second time relay, the normally open switch KT02 of the second time relay is disposed in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified.
In one embodiment of the present application, the time delay of the second time relay is greater than the time delay of the first time relay. For example, the time delay of the first time relay may be 30S, and the time delay of the second time relay may be 60S.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the above elements is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. An air conditioner control device, comprising:
the detection circuit is used for detecting whether the main power supply loses power or not;
the control circuit is used for entering a working state when the detection circuit detects that the main power supply is in power failure so as to drive the driving circuit of the air conditioner and control the air conditioner to switch the air door;
the power supply switching circuit is used for switching the power supply of the air conditioner into an emergency power supply after the control circuit enters a working state, and controlling the inverter circuit between the emergency power supply and the air conditioner to enter into work so as to enable the air conditioner to work;
the control circuit comprises a primary control circuit and a secondary control circuit; the primary control circuit is connected in series with a detection coil of a first intermediate relay, and a normally open switch of the first intermediate relay is arranged in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works; the secondary control circuit is also connected with a detection coil of at least one second intermediate relay, and a normally open switch and a normally closed switch corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open switch and the normally closed switch are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of an air door;
the normally open switch of the first intermediate relay is further arranged in the power supply switching circuit, and after the primary control circuit works, the power supply switching circuit is electrified to work.
2. The air conditioner control device according to claim 1, wherein the detection circuit detects whether the main power supply is powered off through a three-phase detection relay;
the detection coil of the three-phase detection relay is connected to the power signal line of the main power supply, and the normally closed switch of the three-phase detection relay is arranged in the control circuit.
3. The air conditioner control device according to claim 2, wherein a normally closed switch of the three-phase detection relay is provided in the one-stage control circuit.
4. The air conditioner control device according to claim 3, wherein the power supply switching circuit is further connected to a detection coil of a first time relay, and controls a contactor between the emergency power supply and the at least one group of air conditioners to be energized after the detection coil of the first time relay is energized;
the power supply switching circuit is also connected with a detection coil of a second time relay, a normally open switch of the second time relay is arranged in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified;
the time delay of the second time relay is greater than the time delay of the first time relay.
5. The air conditioner control device according to claim 3, wherein the detection circuit further detects a control instruction for the controller to start the air conditioner through a third intermediate relay;
the detection coil of the third intermediate relay is connected to the control signal line of the controller, and the normally open switch of the third intermediate relay is connected in series in the primary control circuit.
6. An air conditioner control method, comprising:
the detection circuit detects whether the main power supply is powered off;
when the main power supply is detected to be powered off, the control circuit is enabled to enter a working state, the driving circuit of the air conditioner is driven, and the air conditioner is controlled to switch the air door;
the power supply switching circuit is enabled to work, the power supply of the air conditioner is switched into an emergency power supply, and the inverter circuit between the emergency power supply and the air conditioner is controlled to work so that the air conditioner works;
the control circuit comprises a primary control circuit and a secondary control circuit; the primary control circuit is connected in series with a detection coil of a first intermediate relay, and a normally open switch of the first intermediate relay is arranged in the secondary control circuit, so that the secondary control circuit is electrified after the primary control circuit works; the secondary control circuit is also connected with a detection coil of at least one second intermediate relay, and a normally open switch and a normally closed switch corresponding to the at least one second intermediate relay are arranged in the driving circuit, so that after the secondary control circuit works, the switching actions of the normally open switch and the normally closed switch are controlled, and at least one group of air conditioners corresponding to the at least one second intermediate relay perform the switching actions of an air door;
the normally open switch of the first intermediate relay is further arranged in the power supply switching circuit, and after the primary control circuit works, the power supply switching circuit is electrified to work.
7. The air conditioner control method according to claim 6, wherein the detecting circuit detects whether the main power supply is powered off, comprising: and detecting whether the main power supply loses power or not through a three-phase detection relay.
8. The air conditioner control method according to claim 7, wherein a normally closed switch of the three-phase detection relay is provided in the one-stage control circuit.
9. The air conditioner control method according to claim 8, wherein the power supply switching circuit is further connected to a detection coil of a first time relay, and after the detection coil of the first time relay is energized, the contactor between the emergency power supply and the at least one group of air conditioners is controlled to be energized;
the power supply switching circuit is also connected with a detection coil of a second time relay, a normally open switch of the second time relay is arranged in the inverter circuit, and the inverter circuit is enabled to work after the detection coil of the second time relay is electrified;
the time delay of the second time relay is greater than the time delay of the first time relay.
10. A circuit system, comprising: the system comprises a main power supply, an emergency power supply, an inverter circuit, at least one group of air conditioners and corresponding driving circuits, a software controller and a hardware circuit control circuit; the hardware circuit control circuit is the air conditioner control device according to any one of claims 1 to 5;
the main power supply is used for supplying power to the at least one group of air conditioners under the normal condition, and the normal condition is the condition when the main power supply works normally;
the emergency power supply is used for supplying power to the driving circuit, the software controller and the hardware circuit control circuit through the inverter circuit under the emergency condition, wherein the emergency condition is the condition that the main power supply is abnormal;
the software controller is used for sending a starting control instruction to the at least one group of air conditioners; the hardware circuit control circuit is also used for detecting the starting control instruction.
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| CN202210931149.6A CN115179984B (en) | 2022-08-04 | 2022-08-04 | Air conditioner control device, method and circuit system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210931149.6A CN115179984B (en) | 2022-08-04 | 2022-08-04 | Air conditioner control device, method and circuit system |
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| CN115179984B true CN115179984B (en) | 2024-03-12 |
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| CN115179984A (en) | 2022-10-14 |
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