CN108016240B - DC-AC power supply circuit for new energy electric bus air conditioner - Google Patents
DC-AC power supply circuit for new energy electric bus air conditioner Download PDFInfo
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- CN108016240B CN108016240B CN201711445936.5A CN201711445936A CN108016240B CN 108016240 B CN108016240 B CN 108016240B CN 201711445936 A CN201711445936 A CN 201711445936A CN 108016240 B CN108016240 B CN 108016240B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a DC-AC power supply circuit for an air conditioner of a new energy electric bus, which comprises: one end of the first resistor is connected with the power-on voltage of the new energy electric bus; the sliding piece of the sliding rheostat is connected to a node between the first end of the resistance wire of the sliding rheostat and the first resistor; the sliding piece of the sliding rheostat is connected with the node of the first resistor to be connected with the high-voltage input end of the frequency converter, and the three-phase voltage output end of the frequency converter is used for being connected to an air conditioner electric compressor of the new energy electric bus air conditioner; and a monitoring module including a voltage sensor and a control circuit. The DC-AC power supply circuit for the air conditioner of the new energy electric bus solves the problem that the specified voltage value can not be output according to the voltage value adjustment provided by the electric compressor of the air conditioner by the vehicle in the prior art.
Description
Technical Field
The invention relates to a circuit for an air conditioner of a new energy electric motor coach, in particular to a DC-AC power supply circuit for the air conditioner of the new energy electric motor coach.
Background
The utility model discloses an industry variable frequency air conditioner electric compressor energy-saving control and long-range wireless management system of application number 201220677873.2, including air conditioner electric compressor, a control circuit, first wireless communication module, second wireless communication module and remote control supervisor, air conditioner electric compressor connection control circuit, control circuit connects first wireless communication module, remote control supervisor is connected with second wireless communication module, first wireless communication module passes through wireless network connection with second wireless communication module, control circuit is including master control circuit, the transformer, switching power supply, the touch-sensitive screen, data acquisition sensor, converter and contactor, air conditioner electric compressor is connected to the converter electricity, master control circuit is connected with switching power supply respectively, the touch-sensitive screen, data acquisition sensor and converter, master control circuit is connected with first wireless communication module, bypass at converter bypass and air conditioner electric compressor bypass all are equipped with the contactor. Although the agenda realizes whether the remote monitoring air conditioner electric compressor is damaged or not, the energy-saving control and the remote wireless management system of the industrial variable frequency air conditioner electric compressor still have the following defects:
1) Because the battery in the general new energy electric bus provides direct current and the air conditioner electric compressor is required to work under alternating current, the energy-saving control and remote wireless management system of the industrial variable frequency air conditioner electric compressor cannot realize the conversion from direct current to alternating current;
2) Because of different vehicle models, different direct currents are provided for the air conditioner electric compressor, and because the transformer only changes the voltage under the appointed proportion, the constant direct current voltage output can not be obtained according to the adjustment of different sizes.
Disclosure of Invention
The invention provides a DC-AC power supply circuit for an air conditioner of a new energy electric bus, which solves the problem that the prior art cannot output a specified voltage value according to the voltage value adjustment provided by a vehicle for an air conditioner electric compressor.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a DC-AC power supply circuit for a new energy electric bus air conditioner, comprising:
one end of the first resistor is connected with the power-on voltage of the new energy electric bus;
the sliding piece of the sliding rheostat is connected to a node between the first end of the resistance wire of the sliding rheostat and the first resistor;
the sliding piece of the sliding rheostat is connected with the high-voltage input end of the frequency converter, the low-voltage input end of the frequency converter is grounded, and the three-phase voltage output end of the frequency converter is used for being connected to an air conditioner electric compressor of a new energy electric bus air conditioner;
the voltage stabilizing circuit comprises a filter reactor and a capacitor, wherein the negative electrode of the filter reactor is grounded, the positive electrode of the filter reactor is connected to the negative electrode of the capacitor, and the positive electrode of the capacitor is connected with the high-voltage input end of the frequency converter; and
the monitoring module comprises a voltage sensor and a control circuit, wherein the input end of the voltage sensor is connected with a node of the first resistor and the power supply, the output end of the voltage sensor is connected with the control circuit, and the output end of the control circuit is connected with the control end of the sliding rheostat so as to adjust the accessed resistance value of the sliding rheostat according to the detected output voltage of the power supply.
Preferably, the sliding resistor includes:
a housing having a first cavity formed therein;
the two mounting seats are arranged in the first cavity and are mounted on the inner bottom wall of the first cavity at intervals;
one end of the porcelain tube is fixed with one mounting seat, and the other end of the porcelain tube is fixed with the other mounting seat;
the resistor wire is wound on the porcelain cylinder, one end of the resistor wire is a first end of the resistor wire of the sliding rheostat, and the other end of the resistor wire is a second end of the resistor wire of the sliding rheostat;
the two mounting frames are respectively erected at the tops of the two mounting seats;
one end of the sliding rod is fixed with one mounting frame, the other end of the sliding rod is fixed with the other mounting frame, and the sliding rod is parallel to the porcelain cylinder;
a slider slidably mounted on the slide bar;
one end of the sliding piece is arranged on the sliding body, the other end of the sliding piece can be clung to the resistance wire, and the sliding piece is a sliding end of the sliding rheostat; and
the driving assembly is arranged on the shell and used for driving the sliding body to move on the sliding rod, and the power end of the driving assembly is the control end of the sliding rheostat.
Preferably, the sliding resistor further comprises: one end of the limiting block is fixed with one mounting frame, the other end of the limiting block is fixed with the other mounting frame, the limiting block is parallel to the sliding rod, and at least four limiting teeth are arranged on the limiting block;
the drive assembly includes: the cylinder is of a cone structure, a piston rod of the cylinder penetrates into the first cavity and is fixed to one end of the extrusion rod, the other end of the extrusion rod is connected to the large end of the cone head, the small end of the cone head extends in a direction away from the cylinder, the diameter of the end face of the large end of the cone head is equal to the diameter of the extrusion rod, the power end of the cylinder is a control end of the sliding rheostat, and the telescopic direction of the cylinder is parallel to the sliding rod; first mounting hole is formed in the recess of conical head tip lateral wall, and first chucking portion installs in first mounting hole, and first chucking portion includes: the clamping device comprises a clamping house, a guide rod and a first spring, wherein one end of the guide rod is fixed with the inner wall of a first mounting hole, the other end of the guide rod extends to the first mounting hole and extends outwards, the guide rod is perpendicular to the extending direction of a cylinder, the guide hole is formed in the clamping house, one end of the clamping house extends into the first mounting hole and is sleeved outside the guide rod, the other end of the clamping house extends outwards, the guide rod penetrates through the first spring, one end of the first spring is fixed with the inner wall of the first mounting hole, the other end of the first spring is fixed with the clamping house, a section of the clamping house, which is close to the first spring, is a strip-shaped section, the strip-shaped section is of a hollow cuboid structure, a section of the clamping house, which is far away from the first spring, is of a triangle-shaped section, is of a triangle-shaped block structure, the face of the triangle-shaped section, which is close to the extruding rod, is of a clamping face parallel to the guide rod, the face of the triangle-shaped section, the face, and the clamping face are of the clamp angle between the extruding cone head, and the triangle-shaped section are of the clamping face are acute angles;
the sliding body includes: the sliding shell is used for allowing the sliding rod and the limiting block to pass through, the sliding shell can only slide under the guide of the sliding rod, the limiting block and the limiting teeth are in non-contact with the sliding shell, and a second cavity is formed in the sliding shell; the installation department is installed on the slip casing, and the installation department includes: the rotary arm is arc-shaped, the rotary arm is positioned in a second cavity and can rotate in the second cavity, the bottom end of the rotary arm is fixed to the outer wall of the rotary arm, a rotary hole which is used for communicating the first cavity with the second cavity is formed in the sliding shell, the rotary arm rotates at the communicating position of the first cavity, the rotary hole and the second cavity, the center column parallel to the sliding rod is fixed on the inner wall of the rotary hole, the rotary arm rotates around the center line of the center column, the coil spring is convoluted between the rotary arm and the center column, one end of the coil spring is fixed with the center column, the other end of the coil spring is fixed with the inner wall of the rotary arm, the top end of the sliding piece is fixed to the outer wall of the rotary arm, a mounting block which is fixed with the inner wall of the second cavity is mounted on one side of the mounting part far away from the cylinder, a through hole for penetrating the conical head is formed in the mounting block, and a stop block which is positioned on one side of the mounting part far away from the mounting part is mounted on the inner wall of the second cavity so as to stop the conical head from penetrating through the through hole; there is the electro-magnet fixed with the second cavity inner wall in the installation piece below, installs second chucking portion on the installation piece, and second chucking portion includes: the moving rod, the mounting ring, the second spring and the permanent magnet, the top end of the moving rod stretches into the through hole, the bottom end of the moving rod penetrates out of the bottom of the mounting block, the top end of the moving rod penetrates through and is fixedly provided with the mounting ring, the moving rod penetrates through the second spring, one end of the second spring is fixedly connected with the inner wall of the through hole, the other end of the second spring is fixedly connected with the mounting ring, and the bottom end of the moving rod penetrates through and is fixedly provided with an electromagnet right above the electromagnet;
when the conical head stretches into the perforation, the extruding rod or the extruding rotating arm makes the bottom end of the sliding sheet have a distance from the bottom end of the sliding sheet to the resistance wire; when the electromagnet is not electrified and the conical head stretches into the through hole, the moving rod is tightly attached to the clamping surface of the clamping house so as to limit the conical head to move towards the direction of the mounting part, and the small end of the conical head is tightly attached to the stop block; when the electromagnet is electrified and the conical head stretches into the through hole, the electromagnet attracts the permanent magnet, a distance exists between the moving rod and the clamping house, and at the moment, the moving rod is clamped between two adjacent limiting teeth.
Preferably, a guide ring tightly attached to the inner wall of the rotary cylinder is fixed on the inner wall of the rotary hole, the guide ring is positioned between the rotary cylinder and the central column, and the height of the guide ring is smaller than that of the central column.
Preferably, a separation cylinder fixed with the inner wall of the rotary hole is arranged between the guide ring and the central column, an outlet is formed in the separation cylinder, and the coil spring is fixed with the inner wall of the rotary cylinder after penetrating out of the outlet.
Preferably, the monitoring module further comprises a displacement sensor, the displacement sensor is arranged on a mounting frame to detect the distance between the sliding body and the mounting frame, and the displacement sensor is connected with the control circuit.
Compared with the prior art, the invention has the following beneficial effects:
1) The frequency converter has the function of an inverter, can convert direct current provided by the power-on voltage of the new energy electric bus into alternating current operated by the air conditioner compressor, and meanwhile, the control circuit detects the change of the environmental temperature of the air conditioner through the environmental temperature sensor and controls the frequency converter to change the frequency of the output voltage, so that the air conditioner compressor can realize frequency conversion work according to the change of the environmental temperature, and the energy saving effect is achieved;
2) When the power-on voltage of the new energy electric bus provides voltage: firstly, a voltage sensor detects a voltage value of a power supply; then, the control circuit calculates the access resistance value of the slide rheostat for reaching the specified voltage value according to the resistance value of the first resistor, and at the moment, a computer program is simply known; and then, the control circuit controls the operation of the sliding rheostat according to the access resistance value of the sliding rheostat, so that the access resistance value of the sliding rheostat is the same as the required value. When the power supply works, the supply voltage of the unknown power supply can be changed into a specified value through the action of the sliding rheostat and is input to the transformer; the power-on voltage of the new energy electric bus is generally 200 v-820 v, the power-on voltage of different buses is different from the power-on voltage of different buses, and the working voltage of the air-conditioning electric compressor is 0-100 ac, so that the power-on voltage of the new energy electric bus needs to reach a specified value of 100v, and the specified value is a direct current input by a frequency converter, and therefore, a sliding rheostat needs to be used for achieving the effect;
3) The input of the frequency converter is constant voltage through the voltage stabilizing circuit, so that the frequency converter is convenient to process, the maximum value and the maximum value of alternating voltage output by the frequency converter are constant, and then the air conditioner electric compressor works more stably.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a circuit diagram of a DC-AC power supply circuit for a new energy electric bus air conditioner;
fig. 2 is a sectional view of the slide rheostat;
FIG. 3 is a cross-sectional view of the sliding housing of FIG. 2;
FIG. 4 is an enlarged view of the rotating drum of FIG. 3;
fig. 5 is an enlarged view of the first and second clamping portions of fig. 3.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention more clear and easy to understand, the present invention is further described below with reference to the accompanying drawings and the detailed description:
as shown in fig. 1, the present invention proposes a DC-AC power supply circuit for an air conditioner of a new energy electric bus, comprising:
one end of the first resistor is connected with the power-on voltage of the new energy electric bus;
the sliding piece of the sliding rheostat is connected to a node between the first end of the resistance wire of the sliding rheostat and the first resistor;
the sliding piece of the sliding rheostat is connected with the high-voltage input end of the frequency converter, the low-voltage input end of the frequency converter is grounded, and the three-phase voltage output end of the frequency converter is used for being connected to an air conditioner electric compressor of a new energy electric bus air conditioner;
the voltage stabilizing circuit comprises a filter reactor and a capacitor, wherein the negative electrode of the filter reactor is grounded, the positive electrode of the filter reactor is connected to the negative electrode of the capacitor, and the positive electrode of the capacitor is connected with the high-voltage input end of the frequency converter; and
the monitoring module comprises a voltage sensor and a control circuit, wherein the input end of the voltage sensor is connected with a node of the first resistor and the power supply, the output end of the voltage sensor is connected with the control circuit, and the output end of the control circuit is connected with the control end of the sliding rheostat so as to adjust the accessed resistance value of the sliding rheostat according to the detected output voltage of the power supply. The frequency converter has the function of an inverter, can convert direct current provided by the power-on voltage of the new energy electric bus into alternating current operated by the air conditioner compressor, and meanwhile, the control circuit detects the change of the ambient temperature of the air conditioner through the ambient temperature sensor and controls the frequency converter to change the frequency of the output voltage, so that the air conditioner compressor can realize variable frequency operation according to the change of the ambient temperature, and the energy-saving effect is achieved.
When the power-on voltage of the new energy electric bus provides voltage: firstly, a voltage sensor detects a voltage value of a power supply; then, the control circuit calculates the access resistance value of the slide rheostat for reaching the specified voltage value according to the resistance value of the first resistor, and at the moment, a computer program is simply known; and then, the control circuit controls the operation of the sliding rheostat according to the access resistance value of the sliding rheostat, so that the access resistance value of the sliding rheostat is the same as the required value. When the power supply works, the supply voltage of the unknown power supply can be changed into a specified value through the action of the sliding rheostat and is input to the transformer; the power-on voltage of the new energy electric bus is generally 200 v-820 v, the power-on voltage of different buses is different from the power-on voltage of different buses, and the working voltage of the air-conditioning electric compressor is 0-100 ac, so that the power-on voltage of the new energy electric bus needs to reach a specified value of 100v, and the specified value is used for inputting direct current to a frequency converter, and therefore, a sliding rheostat needs to be used for achieving the effect.
As shown in fig. 2, in order to design a slide varistor having a simple structure and capable of automatically switching an access resistance value, the slide varistor includes:
a housing 1 in which a first cavity is formed;
the two mounting seats 2 are arranged in the first cavity and are mounted on the bottom wall in the first cavity at intervals;
one end of the porcelain tube 3 is fixed with one mounting seat 2, and the other end of the porcelain tube is fixed with the other mounting seat 2;
the resistor wire 4 is wound on the porcelain tube 3, one end of the resistor wire 4 is a first end of the resistor wire 4 of the slide rheostat, and the other end of the resistor wire 4 is a second end of the resistor wire 4 of the slide rheostat;
the two mounting frames 5 are respectively erected on the tops of the two mounting seats 2;
one end of the sliding rod 6 is fixed with one mounting frame 5, the other end of the sliding rod is fixed with the other mounting frame 5, and the sliding rod 6 is parallel to the porcelain barrel 3;
a slider 7 slidably mounted on the slide rod 6;
a sliding piece 8, one end of which is arranged on the sliding body 7, and the other end of which can be clung to the resistance wire 4, wherein the sliding piece 8 is the sliding end of the sliding rheostat; and
the driving assembly 9 is mounted on the shell 1, the driving assembly 9 is used for driving the sliding body 7 to move on the sliding rod 6, and the power end of the driving assembly 9 is the control end of the sliding rheostat.
As shown in fig. 2 to 4, in order to avoid damage to both the wiper 8 and the resistance wire 4 caused by contact between the wiper 8 and the resistance wire 4, in order to reduce the use of a power source, and to realize that the positioning of the sliding housing can be realized only by energizing the electromagnet, the electromagnet can be powered off after the positioning, and the use of energy is reduced, the sliding varistor further comprises: the limiting block 10, one end of the limiting block 10 is fixed with one mounting frame 5, the other end of the limiting block 10 is fixed with the other mounting frame 5, the limiting block 10 is parallel to the sliding rod 6, and at least four limiting teeth 11 are arranged on the limiting block 10;
the drive assembly 9 includes: the cylinder 90, the extrusion rod 91, the conical head 92 and the first clamping part 93, the conical head 92 is of a cone structure, the cylinder 90 is arranged on the shell 1, a piston rod of the cylinder 90 penetrates into the first cavity and is fixed to one end of the extrusion rod 91, the other end of the extrusion rod 91 is connected to the large end of the conical head 92, the small end of the conical head 92 extends towards the direction away from the cylinder 90, the diameter of the end face of the large end of the conical head 92 is equal to the diameter of the extrusion rod 91, the power end of the cylinder 90 is the control end of the slide rheostat, and the extension direction of the cylinder 90 is parallel to the slide rod 6; first mounting hole is formed in the recess of conical head 92 tip lateral wall, and first chucking portion 93 is installed in first mounting hole, and first chucking portion 93 includes: the clamping device comprises a clamping house 931, a guide rod 932 and a first spring 933, wherein one end of the guide rod 932 is fixed with the inner wall of a first mounting hole, the other end of the guide rod 932 extends to the first mounting hole and extends outwards, the guide rod 932 is perpendicular to the extending direction of the air cylinder 90, the clamping house 931 is provided with a guide hole, one end of the clamping house 931 extends into the first mounting hole and is sleeved outside the guide rod 932, the other end of the clamping house 931 extends outwards, the guide rod 932 passes through the first spring 933, one end of the first spring 933 is fixed with the inner wall of the first mounting hole, the other end of the first spring 933 is fixed with the clamping house 931, a section of the clamping house 931, which is close to the first spring 933, is a strip-shaped section 100, the strip-shaped section 100 is of a hollow cuboid structure, a section 101, which is far away from the first spring 933, is of a triangle-shaped section 101 is of a triangle-shaped block structure, the face of the triangle-shaped section 101 is a clamping face parallel to the guide rod 932, the triangle-shaped section 101 is far away from the extruding face of the extruding rod 91, the triangle-shaped section 101 is of the triangle-shaped, the face is of the triangle-shaped section is a sliding face, the triangle-shaped section is far away from the extruding face of the extruding face 931, the triangle section 101, the triangle-shaped section 92 is a angle between the triangle-shaped and the triangle-shaped section is a cone-shaped, and the triangle-shaped section 92 under the action of the clamping effect of the clamping device.
The slider 7 includes: the sliding housing 70, the mounting part 71 for mounting the sliding sheet 8, the mounting block 72, the stop block 73, the electromagnet 74 and the second clamping part 75, the sliding housing 70 is provided for the sliding rod 6 and the limiting block 10 to pass through, the sliding housing 70 can only slide under the guidance of the sliding rod 6, the limiting block 10 and the limiting teeth 11 are not contacted with the sliding housing 70, and a second cavity is formed in the sliding housing 70; the mounting portion 71 is mounted on the slide housing 70, and the mounting portion 71 includes: the rotary arm 711, the rotary cylinder 712, the central column 713 and the coil spring 714, the rotary arm 711 is arc, the rotary arm 711 is located in the second cavity and can rotate in the second cavity, the bottom end of the rotary arm 711 is fixed to the outer wall of the rotary cylinder 712, a rotary hole which communicates the first cavity with the second cavity is formed in the sliding housing 70, the rotary cylinder 712 rotates at the communication position of the first cavity, the rotary hole and the second cavity, the central column 713 parallel to the sliding rod 6 is fixed on the inner wall of the rotary hole, the rotary cylinder 712 rotates around the central line of the central column 713, the coil spring 714 is convoluted between the rotary cylinder 712 and the central column 713, one end of the coil spring 714 is fixed with the central column 713, the other end of the coil spring 714 is fixed with the inner wall of the rotary cylinder 712, the top end of the sliding sheet 8 is fixed to the outer wall of the rotary cylinder 712, a mounting block 72 which is fixed with the inner wall of the second cavity is tightly attached to the bottom end of the sliding sheet 8 under the action of the coil spring 714, a through hole for the conical head 92 is formed on the side of the mounting block 72, which is far away from the air cylinder 90, and a stop block 92 is mounted on the inner wall of the second cavity, which is far from the mounting block 71, and penetrates through the conical head 92; an electromagnet 74 fixed to the inner wall of the second cavity is provided below the mounting block 72, and a second clamping portion 75 is mounted on the mounting block 72, and the second clamping portion 75 includes: the top end of the moving rod 751 extends into the through hole, the bottom end of the moving rod 751 penetrates out of the bottom of the mounting block 72, the top end of the moving rod 751 penetrates through and is fixedly provided with a mounting ring 752, the moving rod 751 penetrates through the second spring 753, one end of the second spring 753 is fixedly connected with the inner wall of the through hole, the other end of the second spring 753 is fixedly connected with the mounting ring 752, and the bottom end of the moving rod 751 penetrates through and is fixedly provided with an electromagnet 74 right above the electromagnet 74;
wherein, when the conical head 92 is inserted into the perforation, the pressing rod 91 or the pressing rotating arm 711 presses the bottom end of the sliding sheet 8 to the resistance wire 4; when the electromagnet 74 is not electrified and the conical head 92 stretches into the through hole, the moving rod 751 is tightly attached to the clamping surface of the clamping house 931 so as to limit the conical head 92 to move towards the direction of the mounting part 71, and the small end of the conical head 92 is tightly attached to the stop block 73; when the electromagnet 74 is energized and the conical head 92 extends into the aperture, the electromagnet 74 attracts the permanent magnet 754 and a distance is provided between the moving bar 751 and the lock 931, at which time the moving bar 751 is locked between two adjacent lock teeth 11. In order to realize the movement of the whole sliding body 7 on the sliding rod 6 and the rotation of the rotating arm 711, only one driving device is needed for forcing the conductive sheet to be far away from the resistance wire 4 by the cylinder 90, the extruding rod 91 and the conical head 92 are arranged, when the cylinder 90 stretches out to be short, the small end of the conical head 92 acts on the rotating arm 711, under the elasticity of the coil spring 714, the rotating arm 711 is close to the small end of the conical head 92, and meanwhile, the sliding sheet 8 is tightly attached to the resistance wire 4, and at the moment, the sliding rheostat is in a state of normally providing an access resistance value; when the cylinder 90 is extended, the electromagnet 74 is in the power-off state, firstly the conical head 92 of the cylinder 90 stretches into the through hole, when the electromagnet is penetrated, the sliding surface is in contact with the moving rod 751, the moving rod 751 presses the clamping slot 931, so that the first spring 933 is compressed, the triangular section 101 of the clamping slot 931 is slowly pressed into the conical head 92, the clamping slot 931 is prevented from being blocked by the moving rod 751, finally the clamping slot 931 passes over the moving rod 751, the clamping surface of the clamping slot 931 is tightly attached to the moving rod 751, the moving rod 751 can prevent the clamping slot 931 from moving towards the direction of the mounting part 71, meanwhile, the stop 73 can prevent the conical head 92 from continuously moving towards the direction away from the cylinder 90 relative to the sliding shell 70, the electromagnet 74 is not electrified, the state can be kept, under the state, the cylinder 90 can retract or extend, the whole sliding body 7 is driven to move, the action of the first clamping part 93 and the second clamping part 75 avoids that the cylinder 90 drives the pressing rod 91 and the conical head 92 to move relatively to the rotating arm 90, and then the whole sliding body 7 can not move towards the direction of the cylinder 90, and the stop block 73 can avoid the sliding body 7 from moving towards the direction of the cylinder 90 relative to the direction of the sliding body 90. When the sliding body 7 is pushed into place, the rotary cylinder 712 can only rotate relative to the sliding housing 70, the power end of the electromagnet 74 is also the control end of the slide rheostat, the power end of the electromagnet 74 is also connected with a control circuit (the control circuit comprises a controller, a first switch circuit (such as a switch three-level tube) for opening and closing the air cylinder 90 and a second switch circuit (such as a switch three-level tube) for opening and closing the electromagnetic valve), the first switch circuit and the switch circuit of the second switch are connected with the controller), the control circuit controls the electromagnet 74 to electrify, the electromagnet 74 attracts the permanent magnet 754 to move downwards, the moving rod 751 moves downwards along with the electromagnet, so that the moving rod 751 is separated from the card house 931, and simultaneously, the limit block 10 which is clamped under the sliding rod 6 after the moving rod 751 is positioned between two adjacent limit teeth 11 is used for accurately positioning the whole sliding body 7 relative to the sliding rod 6, the sliding body 7 is prevented from continuously moving on the sliding rod 6 when acting on the sliding rod 6, the conical head 92 and the pressing rod 91 are relatively displaced with the sliding housing 70, and finally, the conical head 92 and the rotating arm 74 are in contact with the small end of the rotating arm 74 and the electromagnet 714 are only stops at the small position of the coil spring wire 4, and the time is saved when the rotating wire of the electromagnet 74 is stopped.
In order to make the center around which the rotary cylinder 712 rotates be the center line of the center column 713, a guide ring 715 closely attached to the inner wall of the rotary cylinder 712 is fixed to the inner wall of the rotary hole, the guide ring 715 is located between the rotary cylinder 712 and the center column 713, and the height of the guide ring 715 is smaller than the height of the center column 713. The centerline of guide ring 715 is aligned with the centerline of center post 713.
In order to avoid knotting caused by the fact that the coil spring 714 is pulled out, a separation cylinder 716 fixed with the inner wall of the rotary hole is arranged between the guide ring 715 and the central column 713, an outlet is formed in the separation cylinder 716, and the coil spring 714 penetrates through the outlet and is fixed with the inner wall of the rotary cylinder 712.
In order to make the resistance value of the sliding rheostat connected to the circuit where the first resistor is located be the control value, the design is as follows: the monitoring module further comprises a displacement sensor, wherein the displacement sensor is arranged on a mounting frame 5 to detect the distance from the sliding body 7 to the mounting frame 5, and the displacement sensor is connected with the control circuit. By monitoring the position of the slide body 7 to the mounting frame 5, the position of the real-time slide sheet 8 can be monitored, and the situation that the access resistance value of the slide rheostat is not needed due to the fact that the slide rheostat is not moved in place is avoided, so that the monitoring precision is improved.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (4)
1. A DC-AC power supply circuit for a new energy electric bus air conditioner, comprising:
one end of the first resistor is connected with the power-on voltage of the new energy electric bus;
the sliding piece of the sliding rheostat is connected to a node between the first end of the resistance wire of the sliding rheostat and the first resistor;
wherein, slide rheostat includes:
a housing having a first cavity formed therein;
the two mounting seats are arranged in the first cavity and are mounted on the inner bottom wall of the first cavity at intervals;
one end of the porcelain tube is fixed with one mounting seat, and the other end of the porcelain tube is fixed with the other mounting seat;
the resistor wire is wound on the porcelain cylinder, one end of the resistor wire is a first end of the resistor wire of the sliding rheostat, and the other end of the resistor wire is a second end of the resistor wire of the sliding rheostat;
the two mounting frames are respectively erected at the tops of the two mounting seats;
one end of the sliding rod is fixed with one mounting frame, the other end of the sliding rod is fixed with the other mounting frame, and the sliding rod is parallel to the porcelain cylinder;
a slider slidably mounted on the slide bar;
one end of the sliding piece is arranged on the sliding body, the other end of the sliding piece can be clung to the resistance wire, and the sliding piece is a sliding end of the sliding rheostat; and
the driving assembly is arranged on the shell and used for driving the sliding body to move on the sliding rod, and the power end of the driving assembly is the control end of the sliding rheostat;
the slide rheostat further includes: one end of the limiting block is fixed with one mounting frame, the other end of the limiting block is fixed with the other mounting frame, the limiting block is parallel to the sliding rod, and at least four limiting teeth are arranged on the limiting block;
the drive assembly includes: the cylinder is of a cone structure, a piston rod of the cylinder penetrates into the first cavity and is fixed to one end of the extrusion rod, the other end of the extrusion rod is connected to the large end of the cone head, the small end of the cone head extends in a direction away from the cylinder, the diameter of the end face of the large end of the cone head is equal to the diameter of the extrusion rod, the power end of the cylinder is a control end of the sliding rheostat, and the telescopic direction of the cylinder is parallel to the sliding rod; first mounting hole is formed in the recess of conical head tip lateral wall, and first chucking portion installs in first mounting hole, and first chucking portion includes: the clamping device comprises a clamping house, a guide rod and a first spring, wherein one end of the guide rod is fixed with the inner wall of a first mounting hole, the other end of the guide rod extends to the first mounting hole and extends outwards, the guide rod is perpendicular to the extending direction of a cylinder, the guide hole is formed in the clamping house, one end of the clamping house extends into the first mounting hole and is sleeved outside the guide rod, the other end of the clamping house extends outwards, the guide rod penetrates through the first spring, one end of the first spring is fixed with the inner wall of the first mounting hole, the other end of the first spring is fixed with the clamping house, a section of the clamping house, which is close to the first spring, is a strip-shaped section, the strip-shaped section is of a hollow cuboid structure, a section of the clamping house, which is far away from the first spring, is of a triangle-shaped section, is of a triangle-shaped block structure, the face of the triangle-shaped section, which is close to the extruding rod, is of a clamping face parallel to the guide rod, the face of the triangle-shaped section, the face, and the clamping face are of the clamp angle between the extruding cone head, and the triangle-shaped section are of the clamping face are acute angles;
the sliding body includes: the sliding shell is used for allowing the sliding rod and the limiting block to pass through, the sliding shell can only slide under the guide of the sliding rod, the limiting block and the limiting teeth are in non-contact with the sliding shell, and a second cavity is formed in the sliding shell; the installation department is installed on the slip casing, and the installation department includes: the rotary arm is arc-shaped, the rotary arm is positioned in a second cavity and can rotate in the second cavity, the bottom end of the rotary arm is fixed to the outer wall of the rotary arm, a rotary hole which is used for communicating the first cavity with the second cavity is formed in the sliding shell, the rotary arm rotates at the communicating position of the first cavity, the rotary hole and the second cavity, the center column parallel to the sliding rod is fixed on the inner wall of the rotary hole, the rotary arm rotates around the center line of the center column, the coil spring is convoluted between the rotary arm and the center column, one end of the coil spring is fixed with the center column, the other end of the coil spring is fixed with the inner wall of the rotary arm, the top end of the sliding piece is fixed to the outer wall of the rotary arm, a mounting block which is fixed with the inner wall of the second cavity is mounted on one side of the mounting part far away from the cylinder, a through hole for penetrating the conical head is formed in the mounting block, and a stop block which is positioned on one side of the mounting part far away from the mounting part is mounted on the inner wall of the second cavity so as to stop the conical head from penetrating through the through hole; there is the electro-magnet fixed with the second cavity inner wall in the installation piece below, installs second chucking portion on the installation piece, and second chucking portion includes: the moving rod, the mounting ring, the second spring and the permanent magnet, the top end of the moving rod stretches into the through hole, the bottom end of the moving rod penetrates out of the bottom of the mounting block, the top end of the moving rod penetrates through and is fixedly provided with the mounting ring, the moving rod penetrates through the second spring, one end of the second spring is fixedly connected with the inner wall of the through hole, the other end of the second spring is fixedly connected with the mounting ring, and the bottom end of the moving rod penetrates through and is fixedly provided with an electromagnet right above the electromagnet;
when the conical head stretches into the perforation, the extruding rod or the extruding rotating arm makes the bottom end of the sliding sheet have a distance from the bottom end of the sliding sheet to the resistance wire; when the electromagnet is not electrified and the conical head stretches into the through hole, the moving rod is tightly attached to the clamping surface of the clamping house so as to limit the conical head to move towards the direction of the mounting part, and the small end of the conical head is tightly attached to the stop block; when the electromagnet is electrified and the conical head stretches into the through hole, the electromagnet attracts the permanent magnet, a distance is reserved between the moving rod and the clamping house, and at the moment, the moving rod is clamped between two adjacent limiting teeth;
the sliding piece of the sliding rheostat is connected with the node of the first resistor to be connected with the high voltage input end of the frequency converter,
the low-voltage input end of the frequency converter is grounded, and the three-phase voltage output end of the frequency converter is used for being connected to an air conditioner electric compressor of the new energy electric bus air conditioner;
the voltage stabilizing circuit comprises a filter reactor and a capacitor, wherein the negative electrode of the filter reactor is grounded, the positive electrode of the filter reactor is connected to the negative electrode of the capacitor, and the positive electrode of the capacitor is connected with the high-voltage input end of the frequency converter; and
the monitoring module comprises a voltage sensor and a control circuit, wherein the input end of the voltage sensor is connected with a node of the first resistor and the power supply, the output end of the voltage sensor is connected with the control circuit, and the output end of the control circuit is connected with the control end of the sliding rheostat so as to adjust the accessed resistance value of the sliding rheostat according to the detected output voltage of the power supply;
the control circuit is also connected with an ambient temperature sensor, and the ambient temperature sensor is used for detecting the ambient temperature of the air conditioner; the control circuit controls the frequency of the output voltage of the frequency converter according to the ambient temperature so as to enable the air conditioner electric compressor to perform frequency conversion work.
2. The DC-AC power supply circuit for an air conditioner of a new energy electric bus according to claim 1, wherein a guide ring is fixed on the inner wall of the rotation hole and closely attached to the inner wall of the rotation cylinder, the guide ring is located between the rotation cylinder and the center column, and the height of the guide ring is smaller than the height of the center column.
3. The DC-AC power supply circuit for an air conditioner of a new energy electric bus according to claim 1 or 2, wherein a separation cylinder fixed to the inner wall of the rotary hole is provided between the guide ring and the center post, an outlet is provided on the separation cylinder, and the coil spring is fixed to the inner wall of the rotary cylinder after passing through the outlet.
4. The DC-AC power supply circuit for a new energy electric bus air conditioner of claim 3 wherein the monitoring module further comprises a displacement sensor disposed on a mounting frame to detect a distance between the slider and the mounting frame, the displacement sensor being connected to the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445936.5A CN108016240B (en) | 2017-12-27 | 2017-12-27 | DC-AC power supply circuit for new energy electric bus air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445936.5A CN108016240B (en) | 2017-12-27 | 2017-12-27 | DC-AC power supply circuit for new energy electric bus air conditioner |
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| CN108016240A CN108016240A (en) | 2018-05-11 |
| CN108016240B true CN108016240B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711445936.5A Active CN108016240B (en) | 2017-12-27 | 2017-12-27 | DC-AC power supply circuit for new energy electric bus air conditioner |
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| CN117937255A (en) * | 2023-12-11 | 2024-04-26 | 苏州淡旭能源科技有限公司 | Electromagnetic balance self-adjusting intelligent power saving device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2414758A1 (en) * | 1974-03-27 | 1975-10-23 | Varta Batterie | PROCESS FOR DRAINING THE HEAT DEVELOPED IN THE INDIVIDUAL CELLS OF AN ACCUMULATOR |
| WO2016039502A1 (en) * | 2014-09-11 | 2016-03-17 | 한국전기연구원 | Voltage sensing and control circuit |
| CN106143051A (en) * | 2016-07-08 | 2016-11-23 | 荆州市楚泰新能源科技有限公司 | Energy-saving and frequency-variable Electronic Control Assembly for New energy electric passenger vehicle AC/DC air-conditioner system |
-
2017
- 2017-12-27 CN CN201711445936.5A patent/CN108016240B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2414758A1 (en) * | 1974-03-27 | 1975-10-23 | Varta Batterie | PROCESS FOR DRAINING THE HEAT DEVELOPED IN THE INDIVIDUAL CELLS OF AN ACCUMULATOR |
| WO2016039502A1 (en) * | 2014-09-11 | 2016-03-17 | 한국전기연구원 | Voltage sensing and control circuit |
| CN106143051A (en) * | 2016-07-08 | 2016-11-23 | 荆州市楚泰新能源科技有限公司 | Energy-saving and frequency-variable Electronic Control Assembly for New energy electric passenger vehicle AC/DC air-conditioner system |
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| CN108016240A (en) | 2018-05-11 |
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Address after: 434000 No. 155 South Jiangjin East Road, Jingzhou City, Hubei Province Applicant after: JINGZHOU CHUTAI NEW ENERGY TECHNOLOGY CO.,LTD. Address before: 434000 Jingzhou Chengnan Development Zone, Jingzhou City, Hubei Province, No. 3, Unit 2, Unit 3, 218 Building, Auspicious Phoenix City, Quyuan South Road Applicant before: JINGZHOU CHUTAI NEW ENERGY TECHNOLOGY CO.,LTD. |
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