CN215343930U - Electric energy conversion device of intelligent photovoltaic variable frequency heat pump - Google Patents
Electric energy conversion device of intelligent photovoltaic variable frequency heat pump Download PDFInfo
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- CN215343930U CN215343930U CN202121805224.1U CN202121805224U CN215343930U CN 215343930 U CN215343930 U CN 215343930U CN 202121805224 U CN202121805224 U CN 202121805224U CN 215343930 U CN215343930 U CN 215343930U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model provides an electric energy conversion device of an intelligent photovoltaic variable frequency heat pump, which comprises: the three-phase rectification and BOOST circuit booster comprises a three-phase rectification and BOOST circuit booster, a three-phase variable frequency driver, a direct current variable frequency fan driver, a main control board and a manual operator, wherein the main control board is electrically connected with the manual operator, the direct current variable frequency fan driver and the three-phase variable frequency driver respectively, the three-phase rectification and BOOST circuit booster is electrically connected with the three-phase variable frequency driver, a three-phase variable frequency driving circuit is installed in the three-phase variable frequency driver, and a photovoltaic inverter three-phase power supply rectification BOOST circuit is installed in the three-phase rectification and BOOST circuit booster. This electric energy conversion device of intelligence photovoltaic frequency conversion heat pump, intelligent, the degree of integrating is high, can be according to the preferred photovoltaic power that uses of in-service use condition, when photovoltaic power's voltage is unstable or when descending a lot, then by automatic replenishment behind the commercial power voltage rectification, the security is high, stability is good.
Description
Technical Field
The utility model relates to an electric energy conversion device, in particular to an electric energy conversion device of an intelligent photovoltaic variable frequency heat pump.
Background
The traditional variable frequency heat pump unit utilizes 220V or 380V AC power supply to a main control panel and a variable frequency driving module to control the operation of a compressor and an outdoor fan, and achieves the heating or refrigerating effect through the Carnot cycle principle, but the whole energy consumption is high. With PV/T (photovoltaic/photothermal) integrated systems getting more and more attention from scholars due to their higher integrated solar energy utilization efficiency. Since the simple water-cooled PV/T cannot secure the heating water temperature, a solar heat pump system is born. The solar heat pump hot water system is divided into a direct expansion type and an indirect type. The photovoltaic solar heat pump is characterized in that a photovoltaic component is added on a solar heat collecting plate on the basis of a direct expansion type solar heat pump. However, how to realize intelligent switching between the photovoltaic power supply and the mains supply to provide a stable low-energy-consumption power supply for the system is a technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump, which has high intelligent and integrated degrees, can preferentially use a photovoltaic power supply according to the actual use condition, is automatically supplemented after the voltage of the photovoltaic power supply is rectified by mains supply when the voltage of the photovoltaic power supply is unstable or drops a lot, and has high safety and good stability.
In order to realize the technical scheme, the utility model provides an electric energy conversion device of an intelligent photovoltaic variable frequency heat pump, which comprises: the three-phase rectification and BOOST circuit booster is electrically connected with the manual operator, the direct-current variable-frequency fan driver and the three-phase variable-frequency driver respectively, the three-phase rectification and BOOST circuit booster is electrically connected with the three-phase variable-frequency driver, a three-phase variable-frequency driving circuit is installed in the three-phase variable-frequency driver and comprises diodes D1, D2, D3, D4, D5, D6, a reactor L1, capacitors C1, C2, C3 and IPM, wherein the diodes D1 and D4, D3 and D6, D5 and D368 are connected in series and then are connected in parallel to form a three-phase bridge rectifier stack, an R, S, T phase of a commercial three-phase alternating-current power supply is connected with the three-phase bridge rectifier stack at a phase difference of 120 degrees, and the capacitors C1, C2 and C3 are connected in parallel to the rear end of the three-phase bridge rectifier stack and are connected with 686, the reactor L1 is connected in series between the positive output line of the three-phase bridge rectifier stack and the positive electrode of the capacitor C1; a photovoltaic inverter three-phase power supply rectification BOOST circuit is installed in the three-phase rectification and BOOST circuit booster and comprises a photovoltaic inverter, diodes D7, D11, D12, D13, D14, D15, D16, an energy storage inductor L, a capacitor C4, an insulated gate bipolar transistor IGBT and an IC chip, wherein the diodes D11 and D14, D13 and D16, and D15 and D12 are connected in series and then connected in parallel to form a three-phase bridge rectification stack, the R, S, T phase of a photovoltaic inverter three-phase alternating current power supply is connected with the three-phase bridge rectification stack at a phase difference of 120 degrees, the energy storage inductor L and a power diode are connected in series on a positive electrode output line of the three-phase bridge rectification stack, the insulated gate bipolar transistor IGBT and the capacitor C4 are connected in parallel to the rear end of the three-phase bridge rectification stack, the IC chip is connected with the insulated gate bipolar transistor IGBT, and a positive electrode output end and a negative electrode output end of the three-phase IPM in a frequency conversion driver of the three-phase rectification stack of the photovoltaic inverter three-phase power supply three-phase rectification BOOST circuit are respectively connected with a positive electrode IPM output end and a negative electrode of the three-phase inverter three-phase power supply rectification stack The poles are connected.
Preferably, every two diodes in the bridge rectifier stack in the three-phase variable frequency driving circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, and the difference between the common anode diode and the common cathode diode is 60 degrees.
Preferably, each diode in the three-phase variable frequency drive circuit has a forward voltage of 537V, and the rectified dc voltage is 537V.
Preferably, every two diodes in a bridge rectifier stack in the photovoltaic inverter three-phase power supply rectification BOOST circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, the difference between a common anode diode and a common cathode diode is 60 degrees, the forward voltage of each diode is 537V, and the rectified direct current voltage is 537V.
Preferably, the IPM is electrically connected to the dc inverter compressor and the dc fan.
Preferably, the main control board is provided with a temperature protection switch and a temperature sensor, and is also electrically connected with the electric heater, the four-way valve and the water pump respectively.
The electric energy conversion device of the intelligent photovoltaic variable frequency heat pump has the beneficial effects that: this electric energy conversion device of intelligence photovoltaic frequency conversion heat pump simple structure through the structural design to three-phase frequency conversion drive circuit and photovoltaic inverter three-phase power supply rectification BOOST circuit, can be according to the prior photovoltaic power that uses of in-service use condition, when photovoltaic power's voltage is unstable or descend when a lot, then by automatic replenishment behind the commercial power voltage rectification, intelligent, the degree of integrating is high, and the security is high, and stability is good.
Drawings
Fig. 1 is a circuit diagram of the present invention.
FIG. 2 is a diagram of a hardware system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example (b): an electric energy conversion device of an intelligent photovoltaic variable frequency heat pump.
Referring to fig. 1 and 2, an electric energy conversion device of an intelligent photovoltaic variable frequency heat pump includes: the direct current frequency conversion fan booster comprises a three-phase rectification and BOOST circuit booster 4, a three-phase frequency conversion driver 3, a direct current frequency conversion fan driver 5, a main control board 1 and a manual operator 2, wherein the main control board 1 is electrically connected with the manual operator 2, the direct current frequency conversion fan driver 5 and the three-phase frequency conversion driver 3 respectively, the three-phase rectification and BOOST circuit booster 4 is electrically connected with the three-phase frequency conversion driver 3, the three-phase frequency conversion driver 3 is electrically connected with a direct current frequency conversion compressor, the direct current frequency conversion fan driver 5 is electrically connected with a direct current fan, a temperature protection switch 6 and a temperature sensor 7 are installed on the main control board 1, and meanwhile, the main control board 1 is also electrically connected with an electric heater 8, a four-way valve 9 and a water pump 10 respectively.
Referring to fig. 1, a three-phase variable frequency drive circuit is installed in the three-phase variable frequency driver 3, and the three-phase variable frequency drive circuit includes diodes D1, D2, D3, D4, D5, D6, an inductor L1, capacitors C1, C2, C3 and IPM, wherein the diodes D1, D4, D3, D6, and D5, D2 are connected in series and then connected in parallel to form a three-phase bridge rectifier stack, R, S, T phases of a three-phase mains supply are connected to the three-phase bridge rectifier stack with a phase difference of 120 degrees, the capacitors C1, C2, and C3 are connected in parallel to a rear end of the three-phase bridge rectifier stack and connected to the IPM, the IPM is electrically connected to the dc variable frequency compressor and the dc fan, and the inductor L1 is connected in series between an anode output line of the three-phase bridge rectifier stack and an anode of the capacitor C1; every two diodes in a bridge rectifier stack in the three-phase variable frequency driving circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, the difference between a common anode diode and a common cathode diode is 60 degrees, the forward voltage of each diode in the three-phase variable frequency driving circuit is 537V, and the rectified direct current voltage is 537V; in actual work, the three-phase variable frequency driving circuit is used for stably outputting commercial power of AC380V, the bridge rectifier stack of the three-phase variable frequency driver stably outputs DC537V, and stable 537V direct current is continuously supplied to the IPM after passing through harmonic filtering of a reactor L1 and electrolysis of a capacitor C1-C3 so as to drive a direct current variable frequency compressor and a direct current fan.
A photovoltaic inverter three-phase power supply rectification BOOST circuit is installed in the three-phase rectification and BOOST circuit booster and comprises a photovoltaic inverter, diodes D7, D11, D12, D13, D14, D15, D16, an energy storage inductor L, a capacitor C4, an insulated gate bipolar transistor IGBT and an IC chip, wherein the diodes D11 and D14, D13 and D16, and D15 and D12 are connected in series and then connected in parallel to form a three-phase bridge rectification stack, the R, S, T phase of a photovoltaic inverter three-phase alternating current power supply is connected with the three-phase bridge rectification stack at a phase difference of 120 degrees, the energy storage inductor L and a power diode are connected in series on a positive electrode output line of the three-phase bridge rectification stack, the insulated gate bipolar transistor IGBT and the capacitor C4 are connected in parallel to the rear end of the three-phase bridge rectification stack, the IC chip is connected with the insulated gate bipolar transistor IGBT, and a positive electrode output end and a negative electrode output end of the three-phase IPM in a frequency conversion driver of the three-phase rectification stack of the photovoltaic inverter three-phase power supply three-phase rectification BOOST circuit are respectively connected with a positive electrode IPM output end and a negative electrode of the three-phase inverter three-phase power supply rectification stack The two diodes in a bridge rectifier stack in a photovoltaic inverter three-phase power supply rectification BOOST circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, the difference between a common anode diode and a common cathode diode is 60 degrees, the forward voltage of each diode is 537V, and the rectified direct current voltage is 537V; when the IGBT is disconnected, the energy storage inductor L discharges electricity to a load through a power diode D7, and meanwhile the rectified direct current also discharges electricity to the load, and the two are superposed to realize boosting, wherein the discharging time dt is (1-duty ratio) and the switching period dt is (1-D) by the superposition of the energy storage inductor L and the load. During the two times of opening and closing of the IGBT switch, the charging and discharging of the energy storage inductor L are substantially the same, and then (Vin × D)/L { (Vout-Vin) × (1-D) × T }/L, after simplification: vout is Vin/(1-D), so the boosted dc voltage value depends on the duty cycle D of the IGBT switch. Vin is rectified dc voltage, Vout is boosted dc voltage, L is energy storage inductance, D is duty cycle, and T is switching period. The duty ratio D and the switching period T are regulated by the master control IC. If the alternating-current three-phase voltage of the photovoltaic inverter is unstable or drops a lot, and the output direct-current voltage exceeds the duty ratio limit value of the BOOST voltage, the alternating-current three-phase voltage is automatically supplemented after being rectified by the mains supply voltage.
This electric energy conversion device of intelligence photovoltaic frequency conversion heat pump simple structure through the structural design to three-phase frequency conversion drive circuit and photovoltaic inverter three-phase power supply rectification BOOST circuit, can be according to the prior photovoltaic power that uses of in-service use condition, when photovoltaic power's voltage is unstable or descend when a lot, then by automatic replenishment behind the commercial power voltage rectification, intelligent, the degree of integrating is high, and the security is high, and stability is good.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (6)
1. An electric energy conversion device of an intelligent photovoltaic variable frequency heat pump comprises: the three-phase rectification and BOOST circuit booster is characterized in that a three-phase frequency conversion driving circuit is installed in the three-phase frequency conversion driver and comprises diodes D1, D2, D3, D4, D5, D6, a reactor L1, a capacitor C1, C2, C3 and IPM, wherein the diodes D1 and D4, D3 and D6, D5 and D2 are connected in series and then connected in parallel to form a three-phase bridge rectifier stack, the R, S, T phase of a commercial three-phase AC power supply is connected with the three-phase bridge rectifier stack at a phase difference of 120 degrees, and the capacitors C1, C2 and C3 are connected in parallel at the rear end of the three-phase bridge rectifier stack and connected with the three-phase bridge rectifier stack, the reactor L1 is connected in series between the positive output line of the three-phase bridge rectifier stack and the positive electrode of the capacitor C1; a photovoltaic inverter three-phase power supply rectification BOOST circuit is installed in the three-phase rectification and BOOST circuit booster and comprises a photovoltaic inverter, diodes D7, D11, D12, D13, D14, D15, D16, an energy storage inductor L, a capacitor C4, an insulated gate bipolar transistor IGBT and an IC chip, wherein the diodes D11 and D14, D13 and D16, and D15 and D12 are connected in series and then connected in parallel to form a three-phase bridge rectification stack, the R, S, T phase of a photovoltaic inverter three-phase alternating current power supply is connected with the three-phase bridge rectification stack at a phase difference of 120 degrees, the energy storage inductor L and a power diode are connected in series on a positive electrode output line of the three-phase bridge rectification stack, the insulated gate bipolar transistor IGBT and the capacitor C4 are connected in parallel to the rear end of the three-phase bridge rectification stack, the IC chip is connected with the insulated gate bipolar transistor IGBT, and a positive electrode output end and a negative electrode output end of the three-phase IPM in a frequency conversion driver of the three-phase rectification stack of the photovoltaic inverter three-phase power supply three-phase rectification BOOST circuit are respectively connected with a positive electrode IPM output end and a negative electrode of the three-phase inverter three-phase power supply rectification stack The poles are connected.
2. The electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump as claimed in claim 1, wherein: every two diodes in a bridge rectifier stack in the three-phase variable frequency driving circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, and the difference between a common anode diode and a common cathode diode is 60 degrees.
3. The electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump as claimed in claim 2, wherein: the forward voltage of each diode in the three-phase variable frequency driving circuit is 537V, and the rectified direct current voltage is 537V.
4. The electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump as claimed in claim 1, wherein: every two diodes in a bridge rectifier stack in the photovoltaic inverter three-phase power supply rectification BOOST circuit are pulse switches in the same group, the pulse difference between the diodes in the same group is 120 degrees, the difference between a common anode diode and a common cathode diode is 60 degrees, the forward voltage of each diode is 537V, and the rectified direct current voltage is 537V.
5. The electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump as claimed in claim 1, wherein: the IPM is electrically connected with the direct current variable frequency compressor and the direct current fan.
6. The electric energy conversion device of the intelligent photovoltaic variable-frequency heat pump as claimed in claim 1, wherein: the main control board is provided with a temperature protection switch and a temperature sensor, and is also electrically connected with the electric heater, the four-way valve and the water pump respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121805224.1U CN215343930U (en) | 2021-08-04 | 2021-08-04 | Electric energy conversion device of intelligent photovoltaic variable frequency heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121805224.1U CN215343930U (en) | 2021-08-04 | 2021-08-04 | Electric energy conversion device of intelligent photovoltaic variable frequency heat pump |
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| CN215343930U true CN215343930U (en) | 2021-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646108A (en) * | 2022-03-26 | 2022-06-21 | 常州世博恩新能源科技有限公司 | Solar air conditioner control system |
| US11404991B2 (en) * | 2020-01-10 | 2022-08-02 | Yaskawa America, Inc. | Variable frequency drive DC bus capacitor configuration to limit DC bus short circuit current |
-
2021
- 2021-08-04 CN CN202121805224.1U patent/CN215343930U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11404991B2 (en) * | 2020-01-10 | 2022-08-02 | Yaskawa America, Inc. | Variable frequency drive DC bus capacitor configuration to limit DC bus short circuit current |
| CN114646108A (en) * | 2022-03-26 | 2022-06-21 | 常州世博恩新能源科技有限公司 | Solar air conditioner control system |
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