CN213752391U - Detachable capacitor bank module and air conditioning system - Google Patents
Detachable capacitor bank module and air conditioning system Download PDFInfo
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- CN213752391U CN213752391U CN202022689459.0U CN202022689459U CN213752391U CN 213752391 U CN213752391 U CN 213752391U CN 202022689459 U CN202022689459 U CN 202022689459U CN 213752391 U CN213752391 U CN 213752391U
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Abstract
The utility model discloses a can dismantle electric capacity group module and air conditioning system, can dismantle electric capacity group module includes: the device comprises a carrier provided with a first pin group and a second pin group, and a capacitor group packaged on the carrier, wherein one end of the capacitor group is connected with the first pin group, the other end of the capacitor group is connected with the second pin group, at least one end of the capacitor group is connected with the corresponding pin group through a controllable switch, the on-off state of the controllable switch is switched by a control module, and the control module detects the working parameters of the capacitor group and turns off the controllable switch when the working parameters exceed a set value. The utility model discloses independently encapsulate electric capacity group and become and to dismantle the module, be connected through pin and external circuit, easily dismantle the change, reduce cost of maintenance to be equipped with controllable switch between electric capacity group and the pin, through controllable switch disconnection generating line electric capacity and external circuit when electric capacity group trouble, avoid generating line electric capacity to damage.
Description
Technical Field
The utility model relates to a can dismantle electric capacity group technical field, especially relate to take protect function's can dismantle electric capacity group module and air conditioning system.
Background
As shown in fig. 1, in the existing photovoltaic (storage) air conditioning system, the output voltage of the photovoltaic array is connected to the high-voltage DC bus through the first DC/DC converter, the energy storage battery is connected to the high-voltage DC bus through the second DC/DC converter, on one hand, the energy in the high-voltage DC bus can be connected to the grid or taken from the power grid through the first DC/AC converter, and on the other hand, the energy in the bus supplies power to the compressor load through the second DC/AC converter. In the system, all converters are connected to a direct-current bus capacitor, the bus capacitor is a decoupling unit of alternating-current and direct-current energy, and the bus capacitor is formed by connecting a plurality of electrolytic capacitors in series and in parallel under a common condition. When any one converter in the system has a short-circuit fault, the positive electrode and the negative electrode of the bus capacitor can be short-circuited, so that the bus capacitor is damaged. The first DC/DC converter, the first DC/AC converter and the bus capacitor are all installed in the variable current controller, and when the bus capacitor is damaged, the whole variable current controller needs to be disassembled and replaced, so that the disassembling difficulty is high, and the maintenance cost is high.
Therefore, how to design the detachable capacitor bank module and the air conditioning system is an urgent technical problem to be solved in the industry.
SUMMERY OF THE UTILITY MODEL
In order to solve the defect that exists among the prior art, the utility model provides a take protect function's detachable capacitor bank module and air conditioning system, this capacitor bank independently encapsulates into and to dismantle the module, is connected through pin and external circuit, and easily dismantles the change, reduces cost of maintenance. And be equipped with controllable switch between electric capacity group and the pin, break bus capacitor and external circuit through controllable switch when electric capacity group trouble, avoid bus capacitor to damage.
The utility model discloses a technical scheme be, the electric capacity group module can be dismantled in the design, include: the device comprises a carrier provided with a first pin group and a second pin group, and a capacitor group packaged on the carrier, wherein one end of the capacitor group is connected with the first pin group, the other end of the capacitor group is connected with the second pin group, and at least one end of the capacitor group is connected with the corresponding pin group through a controllable switch.
Preferably, the carrier is further provided with a third pin group for feeding back the on-off state of the controllable switch.
Preferably, the controllable switch adopts a relay or a contactor, and an auxiliary contact of the controllable switch is connected with the third pin group.
Preferably, the on-off state of the controllable switch is switched by the control module, and the control module detects the working parameter of the capacitor bank and turns off the controllable switch when the working parameter exceeds a set value.
Preferably, the control module includes:
the detection device detects working parameters of the capacitor bank;
a comparison circuit which compares the operating parameter with a set value and outputs a comparison signal;
the conversion circuit receives the comparison signal and converts the comparison signal into a control signal;
and the execution circuit switches the on-off state of the controllable switch according to the control signal.
Preferably, the set value includes a first threshold value and a second threshold value lower than the first threshold value; the comparison circuit includes: the output end of the first comparator is connected with a first comparator and a second comparator of the conversion circuit, the inverting end of the first comparator and the non-inverting end of the second comparator are both connected with the detection device, the non-inverting end of the first comparator is connected with a first input device for providing a first threshold value, and the inverting end of the second comparator is connected with a second input device for providing a second threshold value; the conversion circuit converts a low level signal output by the first comparator or the second comparator into a high level signal.
Preferably, the controllable switch adopts a normally closed relay or contactor, and the execution circuit comprises: the power supply circuit comprises a power supply branch circuit for supplying power to a coil of the controllable switch and a switching tube connected in the power supply branch circuit in series, wherein the control end of the switching tube is connected with a conversion circuit, and when the conversion circuit outputs a high-level signal, the coil of the controllable switch is electrified to disconnect a main contact of the controllable switch.
Preferably, the carrier is provided with a fourth pin group connected with the input end of the power supply branch and a fifth pin group connected with the output end of the power supply branch.
Preferably, the detection device adopts a current transformer for detecting the current of the capacitor bank.
The utility model also provides an air conditioning system, this air conditioning system plug in install the above-mentioned electric capacity group module of dismantling.
Preferably, the air conditioning system includes: the controller is provided with a first DC/AC converter, and an alternating current load connected with the controller through a second DC/AC converter, wherein the alternating current side of the first DC/AC converter is connected with an alternating current power supply, and the direct current side of the first DC/AC converter is connected with the second DC/AC converter. The detachable capacitor bank module is plugged on the controller, the first pin group comprises a first pin C, the second pin group comprises a second pin D, and the first pin C and the second pin D are connected to the direct current side of the first DC/AC converter.
Preferably, the controller is further provided with a first DC/DC converter, an input side of the first DC/DC converter is connected to the photovoltaic array, an output side of the first DC/DC converter is connected to the energy storage battery through a second DC/DC converter, the first pin group includes a first pin a, the second pin group includes a second pin B, and the first pin a and the second pin C are connected to an output side of the first DC/DC converter.
In a possible embodiment, one end of the capacitor bank is connected to the first pin a and the controllable switch K2 is connected to the first pin C through the controllable switch K1, respectively, and/or the other end of the capacitor bank is connected to the first pin B and the controllable switch K4 is connected to the second pin D through the controllable switch K3, respectively.
Compared with the prior art, the utility model discloses following technological effect has:
1. the capacitor bank is independently packaged into a detachable module which is connected with an external circuit through pins, so that the capacitor bank is easy to insert and replace, and the maintenance cost is reduced;
2. the capacitor bank is connected with an external circuit through the controllable switch, and the controllable switch is disconnected when the capacitor bank fails, so that the bus capacitor is prevented from being damaged;
3. the on-off state of the controllable switch is switched by the control module, the control module detects working parameters of the capacitor bank, judges whether the capacitor bank is abnormal or not according to the working parameters, and automatically switches off the controllable switch when the capacitor bank is abnormal, so that the safety and the reliability are improved;
4. the detachable module is provided with a third pin group for feeding back the on-off state of the controllable switch, the third pin group can be connected with an external controller, and the external controller gives an alarm when the controllable switch is disconnected so as to inform related personnel of checking.
Drawings
The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:
FIG. 1 is a schematic circuit connection diagram of a prior art photovoltaic air conditioning system;
fig. 2 is a schematic pin diagram of a detachable capacitor bank module according to the present invention;
fig. 3 is a schematic circuit diagram of the detachable capacitor bank module according to the present invention;
fig. 4 is a schematic circuit connection diagram of the photovoltaic air conditioning system of the present invention.
Detailed Description
The utility model provides a can dismantle electric capacity group module is independently encapsulated into with bus-bar electric capacity group and can dismantle the module, is applicable to air conditioning system to solve current air conditioner and appear that converter short circuit trouble arouses the positive negative pole short circuit of bus-bar electric capacity, make its explosion, and then lead to the paralytic major safety problem of system. Of course, the detachable capacitor bank module can also be used in other electric appliances and is plugged in the converter of the electric appliance.
Specifically, as shown in fig. 2 and 3, the detachable capacitor bank module includes a carrier 1 and a main circuit 2 packaged on the carrier 1, the carrier 1 is provided with a first pin group and a second pin group, the first pin group is provided with more than one first pin, the second pin group is provided with more than one second pin, the main circuit 2 includes a capacitor bank and a controllable switch connected with the capacitor bank, the capacitor bank is composed of at least one bus capacitor, in an embodiment of the present invention, the bus capacitor C1 is connected in parallel to the bus capacitor Cn to form the capacitor bank, and a plurality of bus capacitors can be connected in series and parallel, and the number and connection mode of the bus capacitors can be flexibly adjusted according to actual use requirements.
One end of the capacitor group is connected with the first pin group, the other end of the capacitor group is connected with the second pin group, and at least one end of the capacitor group is connected with the corresponding pin group through the controllable switch. It should be noted that the carrier 1 is not limited to a shape, and may be in the form of a circuit board, a package body, etc., and the pin group on the carrier is used for being connected with an external circuit in an inserting manner.
The capacitor group can be connected with the corresponding pin group through the controllable switch at only one end, or can be connected with the corresponding pin group through the controllable switch at both ends. The utility model provides an in one embodiment, first pin group contains two first pins, be first pin A and first pin C respectively, second pin group contains two second pins, be second pin B and second pin D respectively, use the one end of electric capacity group to pass through controllable switch and connect first pin group as the example, can establish ties a controllable switch of connecting all first pins in the one end of electric capacity group, by the on-off state of the unified all first pin place branch roads of control of this controllable switch, also can establish ties a controllable switch in the one end of every first pin, by the on-off state of this first pin place branch road of this controllable switch individual control.
Preferably, the on-off state of the controllable switch is switched by the control module 3 packaged on the carrier 1, the control module 3 detects working parameters of the capacitor bank, whether the capacitor bank is abnormal is judged according to whether the working parameters exceed the set values, when the working parameters exceed the set values, the capacitor bank is judged to be abnormal, the control module 3 automatically switches off the controllable switch, the damage of a bus capacitor is avoided, and the safety and the reliability are improved. Further, the carrier 1 is further provided with a third pin group E for feeding back the on-off state of the controllable switch, the third pin group E can be connected with an external controller, and the external controller gives an alarm when the controllable switch is disconnected so as to inform related personnel of checking in time. In a preferred embodiment, the controllable switch is a relay or a contactor, and the auxiliary contact of the controllable switch is connected with the third pin group E.
The specific circuit structure of the control module 3 includes: the detection device is used for detecting working parameters of the capacitor bank, the comparison circuit compares the working parameters with set values and outputs comparison signals, the conversion circuit receives the comparison signals and converts the comparison signals into control signals, and the execution circuit switches the on-off state of the controllable switch according to the control signals.
In a preferred embodiment, the detection device employs a current transformer J1 for detecting the current of the capacitor bank, and assuming that the charging current of the capacitor bank is positive and the discharging current is negative, the maximum value of the charging current of the capacitor bank may be set as the first threshold VREF1 and the minimum value of the discharging current of the capacitor bank may be set as the second threshold VREF2 according to the operating parameters of the system to which the capacitor bank module is applied. In practical applications, the current transformer J1 may convert the collected current into a voltage signal and output the voltage signal to the comparator, the first threshold and the second threshold are converted into corresponding voltage values, and the first input device and the second input device respectively provide the voltage values to the corresponding comparators.
As shown in fig. 3, the comparison circuit includes: the detection device comprises a first comparator U1_1 and a second comparator U1_2, wherein an inverting terminal of the first comparator U1_1 and a non-inverting terminal of the second comparator are connected with the detection device, a non-inverting terminal of the first comparator U1_1 is connected with a first input device providing a first threshold value, a non-inverting terminal of the second comparator U1_2 is connected with a second input device providing a second threshold value, output terminals of the first comparator U1_1 and the second comparator U1_2 are connected with a conversion circuit, the conversion circuit is an inverse driver, the inverse driver converts a low-level signal into a high-level signal when the first comparator U1_1 or the second comparator U1_2 outputs the low-level signal, and converts the high-level signal into a low-level signal when the first comparator U1_1 and the second comparator U1_2 output the high-level signal.
The controllable switch adopts normally closed relay or contactor, and the execution circuit includes: the power supply branch circuit supplies power to the coil of the controllable switch, the switch tube is connected in the power supply branch circuit in series, the switch tube can be selected from a triode and the like, the control end of the switch tube is connected with the conversion circuit, and when the conversion circuit outputs a high-level signal, the coil of the controllable switch is electrified to disconnect the main contact of the controllable switch. The carrier 1 is provided with a fourth pin group F connected with the input end of the power supply branch circuit and a fifth pin group G connected with the output end of the power supply branch circuit, after the detachable capacitor group module is spliced with an external circuit, the power supply branch circuit is supplied with power through the fourth pin group F, and a reference voltage is provided for the emitting electrode of the switching tube through the fifth pin group G.
It should be noted that, when there are more than two controllable switches, one execution circuit is designed for each controllable switch, and all the execution circuits are connected to the output end of the same conversion circuit, or one conversion circuit may be designed for each execution circuit, and all the conversion circuits are connected in parallel to the output ends of the first comparator U1_1 and the second comparator U1_ 2. The utility model provides an in the embodiment, first pin group contains two first pins, be first pin A and first pin C respectively, the one end of electric capacity group is connected first pin A and controllable switch K2 through controllable switch K1 respectively and is connected first pin C, controllable switch S1 'S executive circuit includes controllable switch K1' S coil S1, switch tube Q1 and current-limiting resistor R1, controllable switch S1 'S converting circuit is reverse driver U2_1, controllable switch' S executive circuit includes controllable switch K2 'S coil S2, switch tube Q2 and current-limiting resistor R2, controllable switch S1' S converting circuit is reverse driver U2_ 2.
The operation of the control module is as follows.
When the output signal VOUT of the detection device is between the first threshold VREF1 and the second threshold VREF2, the first comparator U1_1 and the second comparator U1_2 both output high level signals, the conversion circuit converts the high level signals into low level signals, the switch tube is opened, and the coil of the controllable switch is powered off to close the main contact of the controllable switch.
When the output signal VOUT of the detection device is higher than the first threshold VREF1, the first comparator U1_1 outputs a low level signal, the second comparator U1_2 outputs a high level signal, the first comparator U1_1 pulls down the input end of the conversion circuit to a low level signal, the conversion circuit converts the low level signal to a high level signal, the switch tube is turned on, the coil of the controllable switch is powered on to disconnect the main contact of the controllable switch, the connection between the capacitor bank and the external circuit is cut off, and meanwhile, the disconnected state of the controllable switch is uploaded to the external controller, a fault is reported to inform relevant personnel, and the situation that the capacitor bank is short-circuited with the positive electrode and the negative electrode is avoided, so that explosion and damage are caused is avoided.
When the output signal VOUT of the detection device is lower than the second threshold VREF2, the first comparator U1_1 outputs a high level signal, the second comparator U1_2 outputs a low level signal, the second comparator U1_2 pulls down the input end of the conversion circuit to a low level signal, the conversion circuit converts the low level signal to a high level signal, the switch tube is turned on, the coil of the controllable switch is powered on to disconnect the main contact of the controllable switch, the connection between the capacitor bank and the external circuit is cut off, and meanwhile, the disconnected state of the controllable switch is uploaded to the external controller to report a fault and inform related personnel.
The utility model also provides an air conditioning system, this air conditioning system plug in install the above-mentioned electric capacity group module of dismantling.
In one embodiment, an air conditioning system includes: the controller is provided with a first DC/AC converter, the AC load 5 is connected with the controller through a second DC/AC converter, the AC side of the first DC/AC converter is connected with an AC power supply, and the DC side of the first DC/AC converter is connected with the second DC/AC converter. The detachable capacitor bank module is plugged on the controller, the first pin group comprises a first pin C, the second pin group comprises a second pin D, and the first pin C and the second pin D are connected to the direct current side of the first DC/AC converter. One end of the capacitor bank is connected with the first pin C through the controllable switch, or the other end of the capacitor bank is connected with the second pin D through the controllable switch, and then the two ends of the capacitor bank are connected with the corresponding pins through the controllable switch.
In another embodiment, as shown in fig. 4, the air conditioning system is a photovoltaic air conditioning system, the photovoltaic air conditioning system includes a controller and an AC load in the previous embodiment, and is further connected with the photovoltaic array 6 and the energy storage battery, the controller is further provided with a first DC/DC converter in addition to the first DC/AC converter, the input side of the first DC/DC converter is connected with the photovoltaic array, and the output side of the first DC/DC converter is connected with the energy storage battery through a second DC/DC converter.
The detachable capacitor bank module is plugged on the controller, the first pin group comprises a first pin A and a first pin C, the second pin group comprises a second pin B and a second pin D, and the first pin A and the second pin C are connected to the output side of the first DC/DC converter. The connection mode of the capacitor bank and the controller comprises the following three modes, one end of the capacitor bank is connected with a first pin A and a controllable switch K2 through a controllable switch K1 respectively and is connected with a first pin C, or the other end of the capacitor bank is connected with a first pin B and a controllable switch K4 through a controllable switch K3 respectively and is connected with a second pin D, and then the two ends of the capacitor bank are connected with corresponding pins through controllable switches. When the capacitor bank is damaged and needs to be repaired and replaced, the capacitor bank module only needs to be taken out and replaced independently, a controller or other converters do not need to be replaced, replacement cost is reduced, and unit maintenance is easy.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (13)
1. A removable capacitor bank module comprising: the capacitor is characterized in that one end of the capacitor group is connected with the first pin group, the other end of the capacitor group is connected with the second pin group, and at least one end of the capacitor group is connected with the corresponding pin group through a controllable switch.
2. The removable capacitor bank module of claim 1, wherein the carrier is further provided with a third pin set for feeding back on/off states of the controllable switches.
3. The removable capacitor bank module of claim 2, wherein the controllable switch is a relay or a contactor, and the auxiliary contact of the controllable switch is connected to the third pin set.
4. A removable capacitor bank module according to any one of claims 1 to 3, wherein the on/off state of the controllable switch is switched by a control module, which detects an operating parameter of the capacitor bank and switches off the controllable switch when the operating parameter exceeds a set value.
5. The removable capacitor bank module of claim 4, wherein the control module comprises:
the detection device is used for detecting the working parameters of the capacitor bank;
a comparison circuit which compares the operating parameter with a set value and outputs a comparison signal;
the conversion circuit receives the comparison signal and converts the comparison signal into a control signal;
and the execution circuit switches the on-off state of the controllable switch according to the control signal.
6. The removable capacitance bank module of claim 5, wherein the set value comprises a first threshold and a second threshold lower than the first threshold;
the comparison circuit includes: the output end of the first comparator is connected with a first comparator and a second comparator of the conversion circuit, the inverting end of the first comparator and the non-inverting end of the second comparator are both connected with the detection device, the non-inverting end of the first comparator is connected with a first input device for providing the first threshold value, and the inverting end of the second comparator is connected with a second input device for providing the second threshold value;
the conversion circuit converts a low level signal output by the first comparator or the second comparator into a high level signal.
7. The removable capacitor bank module of claim 6, wherein the controllable switch is a normally closed relay or contactor, and the execution circuit comprises: the power supply branch circuit supplies power to a coil of the controllable switch, and the switching tube is connected in the power supply branch circuit in series; and the control end of the switch tube is connected with the switching circuit, and when the switching circuit outputs a high-level signal, the coil of the controllable switch is electrified to disconnect the main contact of the controllable switch.
8. The removable capacitor bank module of claim 7, wherein the carrier is provided with a fourth pin set connected to the supply branch input and a fifth pin set connected to the supply branch output.
9. The removable capacitor bank module of claim 5, wherein the detection device employs a current transformer that detects the capacitor bank current.
10. Air conditioning system, characterized in that the detachable capacitor bank module according to any one of claims 1 to 9 is plug-mounted in the air conditioning system.
11. The air conditioning system of claim 10, comprising: the controller is provided with a first DC/AC converter, and an alternating current load connected with the controller through a second DC/AC converter, wherein the alternating current side of the first DC/AC converter is connected with an alternating current power supply, and the direct current side of the first DC/AC converter is connected with the second DC/AC converter;
the detachable capacitor bank module is plugged on the controller, the first pin group comprises a first pin C, the second pin group comprises a second pin D, and the first pin C and the second pin D are connected to the direct current side of the first DC/AC converter.
12. The air conditioning system of claim 11, wherein the controller is further provided with a first DC/DC converter, the input side of the first DC/DC converter is connected with the photovoltaic array, and the output side of the first DC/DC converter is connected with the energy storage battery through a second DC/DC converter;
the first pin group comprises a first pin A, the second pin group comprises a second pin B, and the first pin A and the second pin C are connected to the output side of the first DC/DC converter.
13. Air conditioning system according to claim 12, wherein one end of the capacitor bank is connected to the first pin a and the controllable switch K2 is connected to the first pin C via the controllable switch K1, respectively, and/or the other end of the capacitor bank is connected to the first pin B and the controllable switch K4 is connected to the second pin D via the controllable switch K3, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022689459.0U CN213752391U (en) | 2020-11-19 | 2020-11-19 | Detachable capacitor bank module and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022689459.0U CN213752391U (en) | 2020-11-19 | 2020-11-19 | Detachable capacitor bank module and air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213752391U true CN213752391U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022689459.0U Active CN213752391U (en) | 2020-11-19 | 2020-11-19 | Detachable capacitor bank module and air conditioning system |
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| Country | Link |
|---|---|
| CN (1) | CN213752391U (en) |
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- 2020-11-19 CN CN202022689459.0U patent/CN213752391U/en active Active
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