Driving device and air energy heat pump system

Abstract

The utility model belongs to the technical field of electric appliances, and particularly relates to a driving device and an air energy heat pump system, the driving device comprises a rectifying circuit, a fan driving circuit and a heat pump driving circuit; the rectifying circuit comprises a diode rectifying circuit, a switching tube power conversion circuit and an output circuit, the alternating current side of the diode rectifying circuit is connected with the alternating current side of the switching tube power conversion circuit, and the alternating current side of the diode rectifying circuit and the alternating current side of the switching tube power conversion circuit receive three-phase power; the direct current side of the diode rectification current and the neutral end of the switching tube power conversion circuit are connected with the output circuit. The output circuit is also connected with the fan driving circuit and the heat pump driving circuit; the driving end of the fan driving circuit is used for being connected with the electrical end of a fan, and the driving end of the heat pump driving circuit is used for being connected with the electrical end of a heat pump. According to the structure, the energy conversion efficiency, the operation efficiency and the stability of the driving device are improved.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, specifically relating to a drive device and an air source heat pump system. Background Technology

[0002] Air source heat pump systems, with their high efficiency, energy saving, and environmental friendliness, are widely used in various fields such as homes, commerce, agriculture, and industry. In homes, they serve as the mainstay of heating and cooling, creating a comfortable environment for residents year-round. In commercial settings, whether it's heating in large shopping malls or hot water supply in hotels and schools, air source heat pumps demonstrate stable and reliable performance. In agriculture, they support greenhouse cultivation and livestock breeding, improving agricultural production efficiency. In industrial applications, air source heat pumps become a crucial support for processes such as drying and constant-temperature storage, contributing to industrial upgrading and green development.

[0003] In existing technologies, the drive unit of an air source heat pump system starts from a three-phase AC input terminal. A three-phase diode rectifier bridge circuit efficiently converts the three-phase AC power supplied by the power grid into DC power. This DC power is then distributed to the fan drive circuit and the heat pump drive circuit, respectively driving the fan and compressor. The fan in the air source heat pump system circulates air to accelerate the heat exchange process, while the compressor, the core of the system, compresses the refrigerant to improve its heat exchange efficiency. The entire air source heat pump system, through intelligent control, ensures that all components work collaboratively to achieve efficient and environmentally friendly heating, cooling, and hot water supply functions.

[0004] However, although the drive unit of the air source heat pump system can convert three-phase AC power into DC power, there are problems such as low energy conversion efficiency, low operating efficiency and poor stability of the drive unit. Utility Model Content

[0005] This application provides a drive device and an air source heat pump system to solve the problems of low energy conversion efficiency, low operating efficiency and poor stability of the drive device.

[0006] In a first aspect, this application provides a driving device, which includes: a rectifier circuit, a fan driving circuit, and a heat pump driving circuit;

[0007] The rectifier circuit includes a diode rectifier circuit, a switching transistor power conversion circuit, and an output circuit. The AC side of the diode rectifier circuit and the AC side of the switching transistor power conversion circuit are connected. Both the AC side of the diode rectifier circuit and the AC side of the switching transistor power conversion circuit receive three-phase power. The DC side of the diode rectifier current and the neutral terminal of the switching transistor power conversion circuit are both connected to the output circuit.

[0008] The output circuit is also connected to the fan drive circuit and the heat pump drive circuit; the drive end of the fan drive circuit is used to connect to the electrical end of the fan, and the drive end of the heat pump drive circuit is used to connect to the electrical end of the heat pump.

[0009] Optionally, the rectifier circuit further includes a filter circuit, the output terminal of which is connected to the input terminal of the diode rectifier circuit, and the input terminal of the filter circuit receives three-phase power.

[0010] Optionally, the rectifier circuit further includes a pre-charge resistor and a pre-charge relay;

[0011] The pre-charge resistor and the pre-charge relay are connected in series between the three-phase AC input terminal and the input terminal of the filter circuit, and the three-phase AC input terminal receives three-phase power.

[0012] Optionally, the rectifier circuit further includes a main relay, which is connected between the three-phase AC input terminal and the input terminal of the filter circuit.

[0013] Optionally, the rectifier circuit further includes an AC current sensor, which is connected in series between the output terminal of the filter circuit and the AC side of the diode rectifier circuit.

[0014] Optionally, the output circuit includes a first supporting capacitor and a second supporting capacitor;

[0015] The first supporting capacitor is connected between the positive terminal of the DC side of the diode rectifier circuit and the neutral terminal of the switching transistor power conversion circuit, and the second supporting capacitor is located between the neutral terminal of the switching transistor power conversion circuit and the negative terminal of the DC side of the diode rectifier circuit.

[0016] Optionally, the output circuit includes a first voltage equalizing resistor and a second voltage equalizing resistor;

[0017] The first voltage equalizing resistor is connected between the positive DC terminal of the diode rectifier circuit and the neutral terminal of the switching transistor power conversion circuit, and the second voltage equalizing resistor is located between the neutral terminal of the switching transistor power conversion circuit and the negative DC terminal of the diode rectifier circuit.

[0018] Optionally, the driving device further includes: a first DSP controller and a second DSP controller;

[0019] The first DSP controller is connected to the rectifier circuit, and the first DSP controller is also connected to the heat pump drive circuit;

[0020] The second DSP controller is connected to the rectifier circuit and the second DSP controller is connected to the fan drive circuit.

[0021] Secondly, this application provides an air source heat pump system, including: a drive unit, a fan, and a heat pump;

[0022] The DC side of the drive device is connected to the electrical terminal of the fan, and the DC side of the drive device is connected to the electrical terminal of the heat pump.

[0023] This application provides a driving device and an air source heat pump system, including: a rectifier circuit, a fan drive circuit, and a heat pump drive circuit; the rectifier circuit includes a diode rectifier circuit, a switching transistor power conversion circuit, and an output circuit. The AC side of the diode rectifier circuit and the AC side of the switching transistor power conversion circuit are connected, and both the AC side of the diode rectifier circuit and the AC side of the switching transistor power conversion circuit receive three-phase power. The DC side of the diode rectified current and the neutral terminal of the switching transistor power conversion circuit are both connected to the output circuit; the output circuit is also connected to the fan drive circuit and the heat pump drive circuit; the drive terminal of the fan drive circuit is used to connect to the electrical terminal of the fan, and the drive terminal of the heat pump drive circuit is used to connect to the electrical terminal of the heat pump; this structure improves the energy conversion efficiency, operating efficiency, and stability of the driving device. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a schematic diagram of the structure of a driving device according to this application;

[0026] Figure 2 This is a schematic diagram of the rectifier circuit topology in a driving device according to this application;

[0027] Figure 3 This is a circuit control schematic diagram of a driving device according to this application;

[0028] Figure 4 This is a schematic diagram of an air source heat pump system according to this application.

[0029] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0030] Reference numerals: A, Drive unit; 1, Rectifier circuit; 2, Fan drive circuit; 3, Heat pump drive circuit; 4, Three-phase power; 5, First DSP controller; 6, Second DSP controller; 7, Fan; 8, Heat pump; 101, Diode rectifier circuit; 102, Switching transistor power conversion circuit; 103, Filter circuit; 104, Pre-charge resistor; 105, Pre-charge relay; 106, Main relay; 107, AC current sensor; 108, Capacitor absorption plate; 109, First supporting capacitor; 110, Second supporting capacitor; 111, First equalizing resistor; 112, Second equalizing resistor. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0033] In existing technologies, the drive unit of an air source heat pump system demonstrates highly efficient power conversion capabilities. Starting from the three-phase AC input, a three-phase diode rectifier bridge circuit converts the three-phase AC power from the power grid into DC power. This DC power is then precisely distributed to the fan drive circuit and the heat pump drive circuit, driving the fan and compressor respectively. The fan circulates air to promote heat exchange, while the compressor, as the core of the heat pump system, enhances heat exchange efficiency by compressing the refrigerant. The entire system relies on intelligent control to ensure coordinated operation of all components, providing users with efficient and environmentally friendly heating, cooling, and hot water services.

[0034] However, despite the excellent performance of air source heat pump systems in terms of energy conversion, several significant technical challenges remain. First, energy conversion efficiency needs further improvement to reduce energy loss during the conversion process. Second, the operating efficiency of air source heat pump systems also needs optimization to ensure high efficiency and stability during long-term operation. Finally, the stability of air source heat pump systems cannot be ignored; failure of any component can affect overall performance.

[0035] To address the aforementioned problems, this application provides a driving device and an air-source heat pump system. This device integrates a rectifier circuit 1, a fan drive circuit 2, and a heat pump drive circuit 3. By integrating a diode rectifier circuit 101 and a switching transistor power conversion circuit 102 into the rectifier section, it achieves efficient conversion of three-phase electricity 4. This not only retains the directness of traditional rectification methods but also further improves energy conversion efficiency through switching transistor power conversion. The driving device A flexibly distributes the converted DC power to the drive circuits of the fan 7 and the heat pump 8, ensuring efficient operation of each component and improving the energy conversion efficiency, operating efficiency, and stability of the driving device A.

[0036] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. The specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of a driving device according to this application. Figure 1 As shown, the driving device A in this embodiment is used in an air source heat pump system and includes: a rectifier circuit 1, a fan drive circuit 2, and a heat pump drive circuit 3.

[0038] The rectifier circuit 1 includes a diode rectifier circuit 101, a switching transistor power conversion circuit 102, and an output circuit. The AC side of the diode rectifier circuit 101 and the AC side of the switching transistor power conversion circuit 102 are connected. Both the AC side of the diode rectifier circuit 101 and the AC side of the switching transistor power conversion circuit 102 receive three-phase power 4. The DC side of the diode rectifier circuit 101 and the neutral terminal of the switching transistor power conversion circuit 102 are connected to the output circuit.

[0039] The output circuit is also connected to the fan drive circuit 2 and the heat pump drive circuit 3; the drive end of the fan drive circuit 2 is used to connect to the electrical end of the fan 7, and the drive end of the heat pump drive circuit 3 is used to connect to the electrical end of the heat pump 8.

[0040] The rectifier circuit 1 converts the input alternating current (AC) into direct current (DC) for use by the fan drive circuit 2 and the heat pump drive circuit 3. The rectifier circuit 1 consists of a diode rectifier circuit 101, a switching transistor power conversion circuit 102, and an output circuit. The rectifier circuit 1 can be a Vienna rectifier circuit.

[0041] The diode rectifier circuit 101 uses multiple diodes to flip the negative half-cycle of the alternating current to the positive half-cycle, making the output waveform a unidirectional pulsating direct current. The AC side of this circuit receives three-phase power 4.

[0042] The switching transistor power conversion circuit 102 is connected in parallel with the diode rectifier circuit 101. Through the rapid switching action of the switching transistor, the pulsating DC power is further processed, such as filtered, regulated, or boosted, to improve the quality of the DC power and generate an intermediate voltage output (i.e., the neutral terminal of the DC terminal). This increases the flexibility and efficiency of the drive circuit.

[0043] The output circuit is also connected to the fan drive circuit 2 and the heat pump drive circuit 3. The drive end of the fan drive circuit 2 is connected to the electrical end of the fan 7. By receiving the DC power output from the rectifier circuit 1, the electrical energy is converted into mechanical energy to drive the fan 7 to operate, thereby realizing air circulation or heat dissipation in the air source heat pump system.

[0044] The drive end of the heat pump drive circuit 3 is connected to the electrical end of the heat pump 8. By connecting the output circuit, it drives the compressor and other components to work and complete the heat exchange process in the heat pump 8 system.

[0045] Understandably, when the three-phase power 4 is input to the AC side of the rectifier circuit 1, it is processed by the diode rectifier circuit 101 and the switching transistor power conversion circuit 102 to generate stable DC power. This DC power is supplied to the fan drive circuit 2 and the heat pump drive circuit 3 through the output circuit. The fan drive circuit 2 controls the operation of the fan 7 to maintain airflow in the heat pump 8 system; the heat pump drive circuit 3 controls the compressor of the heat pump 8 main unit to complete the processes of heat absorption, compression, condensation and release, thereby realizing the heating or cooling function of the heat pump 8 system.

[0046] This embodiment provides a driving device, including: a rectifier circuit 1, a fan drive circuit 2, and a heat pump drive circuit 3; the rectifier circuit 1 includes a diode rectifier circuit 101, a switching transistor power conversion circuit 102, and an output circuit. The AC side of the diode rectifier circuit 101 and the AC side of the switching transistor power conversion circuit 102 are connected. Both the AC side of the diode rectifier circuit 101 and the AC side of the switching transistor power conversion circuit 102 receive three-phase power 4. The DC side of the diode rectifier circuit 101 and the neutral terminal of the switching transistor power conversion circuit 102 are connected to the output circuit; the output circuit is also connected to the fan drive circuit 2 and the heat pump drive circuit 3; the drive terminal of the fan drive circuit 2 is used to connect to the electrical terminal of the fan 7, and the drive terminal of the heat pump drive circuit 3 is used to connect to the electrical terminal of the heat pump 8; this structure improves the energy conversion efficiency, operating efficiency, and stability of the driving device A.

[0047] Figure 2 This is a schematic diagram of the topology of the rectifier circuit 1 in a driving device according to this application. Figure 2 As shown, in this embodiment... Figure 1Based on the embodiments, the rectifier circuit 1 will be described in detail. The rectifier circuit 1 in the driving device shown in this embodiment includes: a fan driving circuit 2 and a heat pump driving circuit 3.

[0048] The rectifier circuit 1 also includes a filter circuit 103. The output terminal of the filter circuit 103 is connected to the input terminal of the diode rectifier circuit 101, and the input terminal of the filter circuit 103 receives three-phase power 4.

[0049] Among them, the filter circuit 103 filters out the AC component in the unidirectional pulsating DC output of the rectifier circuit 1, making the output voltage smoother and more stable.

[0050] The filter circuit 103 consists of a filter reactor L1, a boost reactor L2, and a filter capacitor CL1. These components can selectively pass or block current of a specific frequency, thereby achieving filtering of the output voltage.

[0051] Optionally, the rectifier circuit 1 may also include a pre-charge resistor 104 and a pre-charge relay 105;

[0052] The pre-charge resistor 104 and the pre-charge relay 105 are connected in series between the AC three-phase input terminal and the input terminal of the filter circuit 103. The AC three-phase input terminal receives three-phase power 4.

[0053] Among them, the pre-charge resistor 104 is a resistor used for pre-charging the capacitor in the control circuit.

[0054] The pre-charge resistor 104 works by limiting the current of the rectifier circuit 1 during the initial charging phase. When the power supply first starts working, the voltage of the rectifier circuit 1 is zero. Without the pre-charge resistor 104, the charging current of the rectifier circuit 1 would be very large, potentially causing electromagnetic interference or damaging the power switch. By limiting the charging current, the pre-charge resistor 104 allows the rectifier circuit 1 to charge smoothly, preventing any impact on the rectifier circuit 1.

[0055] The working principle of the precharge relay 105 is relatively simple but very effective. When the rectifier circuit 1 is energized, the precharge relay 105 first controls the low-voltage part of the circuit to be energized and stabilizes the voltage through a precharge resistor 104. Subsequently, when the battery voltage is sufficient, the rectifier circuit 1 will precharge through the precharge resistor 104.

[0056] Understandably, the pre-charge resistor 104 and pre-charge relay 105 included in the rectifier circuit 1 are connected in series between the AC three-phase input terminal and the input terminal of the filter circuit 103, in order to limit the surge current when the rectifier circuit 1 is energized and protect the components in the circuit from damage.

[0057] Optionally, the rectifier circuit 1 also includes a main relay 106, which is connected between the three-phase AC input terminal and the input terminal of the filter circuit 103.

[0058] The main function of the main relay 106 is to control the on / off state of the circuit in a high-voltage, high-current circuit. The main relay 106 is typically composed of an electromagnet and a contact system. The operation of the electromagnet controls the closing or opening of the contacts, thereby controlling the rectifier circuit 1.

[0059] Understandably, when the rectifier circuit 1 is energized, the main relay 106 remains closed; when the rectifier circuit 1 is de-energized or malfunctions, the contacts of the main relay 106 will open, thereby cutting off the rectifier circuit 1 and preventing the current from continuing to flow.

[0060] Optionally, the rectifier circuit 1 also includes an AC current sensor 107, which is connected in series between the output terminal of the filter circuit 103 and the AC side of the diode rectifier circuit 101.

[0061] Among them, the AC current sensor 107 can detect the current change on the AC side of the rectifier circuit 1 in real time, ensuring that the current fluctuates within a safe range.

[0062] Understandably, when the current in rectifier circuit 1 exceeds the set threshold, the sensor can quickly detect it and trigger a protection mechanism, such as cutting off the circuit or issuing an alarm, to prevent damage to the circuit and equipment due to overload. The sensor can also respond promptly to abnormal conditions such as short circuits in rectifier circuit 1, protecting the circuit from damage.

[0063] Optionally, the rectifier circuit 1 may also include a capacitor absorption plate 108, which is connected to the input terminal of the filter circuit 103.

[0064] The capacitor absorption plate 108 is used to smooth the pulsating DC voltage after rectification, reduce voltage fluctuations, and improve the stability of the output voltage. In the rectifier circuit 1, due to the nonlinear characteristics of the diodes, the output voltage may contain spikes or noise. The capacitor absorption plate 108 can absorb these voltage spikes, preventing them from interfering with or damaging the rectifier circuit 1. The capacitor absorption plate has the ability to store and release energy. The capacitor absorption plate 108 can store energy when the voltage rises and release energy when the voltage falls, thereby stabilizing the output voltage to a certain extent.

[0065] Optionally, the output circuit includes a first supporting capacitor 109 and a second supporting capacitor 110.

[0066] The first supporting capacitor 109 is connected between the positive terminal of the DC side of the diode rectifier circuit 101 and the neutral terminal of the switching power conversion circuit 102, and the second supporting capacitor 110 is located between the neutral terminal of the switching power conversion circuit 102 and the negative terminal of the DC side of the diode rectifier circuit 101.

[0067] The first supporting capacitor 109 absorbs the voltage peak after rectification during the positive half-cycle and releases energy during the negative half-cycle to smooth the output voltage pulsation. By storing and releasing energy, the first supporting capacitor 109 helps stabilize the positive half-cycle of the DC voltage in the output circuit.

[0068] The second supporting capacitor 110 is similar to the first supporting capacitor 109. The second supporting capacitor 110 mainly absorbs the voltage peak after rectification during the negative half-cycle and releases energy during the positive half-cycle to further smooth the output voltage pulsation. It helps to stabilize the negative half-part of the DC voltage of the output current.

[0069] Optionally, the output circuit includes a first voltage equalization resistor 111 and a second voltage equalization resistor 112;

[0070] The first equalizing resistor 111 is connected between the positive DC terminal of the diode rectifier circuit 101 and the neutral terminal of the switching transistor power conversion circuit 102, and the second equalizing resistor 112 is located between the neutral terminal of the switching transistor power conversion circuit 102 and the negative DC terminal of the diode rectifier circuit 101.

[0071] The first voltage equalizing resistor 111 is connected between the positive terminal of the DC side of the diode rectifier circuit 101 and the neutral terminal of the switching transistor power conversion circuit 102. Due to differences in the characteristics of the rectifier diode or other components, the rectified DC voltage may be unbalanced between the positive and neutral terminals. The first voltage equalizing resistor 111 helps to reduce this imbalance by providing a current path, making the voltage distribution more uniform.

[0072] The second equalizing resistor 112 is located between the neutral terminal of the switching power conversion circuit 102 and the negative terminal of the DC side of the diode rectifier circuit 101. Similar to the first equalizing resistor 111, the second equalizing resistor 112 is also used to balance or distribute the imbalance of the rectified DC voltage between the neutral and negative terminals. This helps to ensure a uniform voltage distribution across the entire DC terminal.

[0073] Understandably, the first voltage equalizing resistor 111 and the second voltage equalizing resistor 112 in the output circuit are mainly used to balance or distribute the imbalance of the rectified DC voltage at different points, while also providing a certain degree of protection and voltage waveform adjustment.

[0074] In this embodiment, the rectifier circuit 1 is a key component of the drive device A. This rectifier circuit 1 integrates the power conversion requirements of the fan drive circuit 2 and the heat pump drive circuit 3, and is equipped with multiple protection and optimization components. First, the filter circuit 103 is placed before the input of the diode rectifier circuit 101, effectively filtering out noise and interference in the three-phase AC power and improving the rectification effect. The series connection of the pre-charge resistor 104 and the pre-charge relay 105 provides a soft-start function for the filter capacitor when the drive device A starts, preventing current surges. The addition of the main relay 106 enables main path control of the three-phase AC power 4, enhancing the safety and controllability of the drive device A. The AC current sensor 107 detects current changes in real time during the rectification process, providing a basis for fault detection and protection of the drive device A. The introduction of the capacitor absorption plate 108 improves the filtering effect and protects the rectifier circuit 1 from voltage fluctuations. In addition, rectifier circuit 1 is equipped with a first supporting capacitor 109 and a second supporting capacitor 110, as well as a first voltage equalizing resistor 111 and a second voltage equalizing resistor 112. These components work together on the DC side of rectifier circuit 1 to effectively balance the voltage distribution, reduce voltage fluctuations, and provide a more stable and smooth DC power supply for the fan drive circuit 2 and the heat pump drive circuit 3. This rectifier circuit 1 embodies the principles of high efficiency, safety, and reliability, providing a strong guarantee for the stable operation of drive device A.

[0075] Figure 3 This is a circuit control schematic diagram of a driving device according to this application. This embodiment... Figure 1 Based on the embodiments, the circuit control of the driving device is described in detail. The circuit control of the driving device shown in this embodiment includes: driving device A, first DSP controller 5 and second DSP controller 6;

[0076] The first DSP controller 5 is connected to the rectifier circuit 1, and the first DSP controller 5 is connected to the heat pump drive circuit 3;

[0077] The second DSP controller 6 is connected to the rectifier circuit 1, and the second DSP controller 6 is connected to the fan drive circuit 2.

[0078] The first DSP controller 5 can control the output of the rectifier circuit 1 and adjust the working state of the heat pump drive circuit 3.

[0079] The second DSP controller 6 is used to control the fan drive circuit 2 and adjust parameters such as the fan speed and air volume of the fan 7.

[0080] Understandably, according to the instructions of the first DSP controller 5, the heat pump drive circuit 3 operates to control the operation of the motor, compressor and other components of the heat pump 8 system to achieve cooling and heating functions; according to the instructions of the second DSP controller 6, the fan drive circuit 2 operates to control the speed and start / stop of the fan 7 to achieve ventilation or heat dissipation.

[0081] The drive device circuit control in this embodiment specifically includes a drive device A, a first DSP controller 5, and a second DSP controller 6. The first DSP controller 5 is directly connected to the rectifier circuit 1, responsible for receiving and processing the rectified DC power, and simultaneously sending precise control signals to the heat pump drive circuit 3 to adjust the operating state of the heat pump 8. The second DSP controller 6 is used to control the fan drive circuit 2, and is also connected to the rectifier circuit 1, adjusting the speed and airflow of the fan 7 through precise control signals. The dual DSP control architecture not only improves the response speed and stability of the drive device A, but also achieves independent and precise control of the heat pump 8 and the fan 7, thereby optimizing the overall operating efficiency and performance of the drive device A.

[0082] Figure 4 This is a schematic diagram of an air source heat pump system according to this application. Figure 1 As shown, the air source heat pump system of this embodiment includes: a drive unit A, a fan 7, and a heat pump 8;

[0083] The DC side of drive unit A is electrically connected to the fan 7, and the DC side of drive unit A is electrically connected to the heat pump 8.

[0084] The air source heat pump system in this embodiment consists of three main components: a drive unit A, a fan 7, and a heat pump 8. The drive unit A, serving as the system's power hub, is cleverly and directly connected on its DC side to the electrical terminals of the fan 7 and the heat pump 8. This ensures that the drive unit A can accurately and efficiently provide the necessary electrical energy to the fan 7 and the heat pump 8, thereby driving the fan 7 to rotate to optimize airflow and simultaneously driving the heat pump 8 to convert and utilize heat energy. Through this tight and orderly electrical connection, the entire air source heat pump system achieves efficient energy transmission and utilization, providing users with a stable and reliable air source heat pump system.

[0085] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0086] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0087] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0088] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A driving device, characterized in that, For use in air source heat pump systems, the driving device includes: a rectifier circuit (1), a fan drive circuit (2), and a heat pump drive circuit (3). The rectifier circuit (1) includes a diode rectifier circuit (101), a switching transistor power conversion circuit (102), and an output circuit. The AC side of the diode rectifier circuit (101) and the AC side of the switching transistor power conversion circuit (102) are connected. Both the AC side of the diode rectifier circuit (101) and the AC side of the switching transistor power conversion circuit (102) receive three-phase power (4). The DC side of the diode rectifier circuit (101) and the neutral terminal of the switching transistor power conversion circuit (102) are connected to the output circuit. The output circuit is also connected to the fan drive circuit (2) and the heat pump drive circuit (3); the drive end of the fan drive circuit (2) is used to connect to the electrical end of the fan (7), and the drive end of the heat pump drive circuit (3) is used to connect to the electrical end of the heat pump (8).

2. The driving device according to claim 1, characterized in that, The rectifier circuit (1) further includes a filter circuit (103), the output terminal of which is connected to the input terminal of the diode rectifier circuit (101), and the input terminal of the filter circuit (103) receives three-phase electricity (4).

3. The driving device according to claim 2, characterized in that, The rectifier circuit (1) also includes a pre-charge resistor (104) and a pre-charge relay (105). The pre-charge resistor (104) and the pre-charge relay (105) are connected in series between the AC three-phase input terminal and the input terminal of the filter circuit (103), and the AC three-phase input terminal receives three-phase electricity (4).

4. The driving device according to claim 3, characterized in that, The rectifier circuit (1) also includes a main relay (106), which is connected between the three-phase AC input terminal and the input terminal of the filter circuit (103).

5. The driving device according to claim 2, characterized in that, The rectifier circuit (1) further includes an AC current sensor (107), which is connected in series between the output terminal of the filter circuit (103) and the AC side of the diode rectifier circuit (101).

6. The driving device according to claim 2, characterized in that, The rectifier circuit (1) further includes a capacitor absorption plate (108), which is connected to the input terminal of the filter circuit (103).

7. The driving device according to any one of claims 1 to 6, characterized in that, The output circuit also includes a first supporting capacitor (109) and a second supporting capacitor (110). The first supporting capacitor (109) is connected between the positive DC terminal of the diode rectifier circuit (101) and the neutral terminal of the switching power conversion circuit (102), and the second supporting capacitor (110) is located between the neutral terminal of the switching power conversion circuit (102) and the negative DC terminal of the diode rectifier circuit (101).

8. The driving device according to any one of claims 1 to 6, characterized in that, The output circuit also includes a first voltage equalizing resistor (111) and a second voltage equalizing resistor (112). The first equalizing resistor (111) is connected between the positive DC terminal of the diode rectifier circuit (101) and the neutral terminal of the switching power conversion circuit (102), and the second equalizing resistor (112) is located between the neutral terminal of the switching power conversion circuit (102) and the negative DC terminal of the diode rectifier circuit (101).

9. The driving device according to any one of claims 1 to 6, characterized in that, The driving device further includes: a first DSP controller (5) and a second DSP controller (6). The first DSP controller (5) is connected to the rectifier circuit (1), and the first DSP controller (5) is connected to the heat pump drive circuit (3); The second DSP controller (6) is connected to the rectifier circuit (1) and the second DSP controller (6) is connected to the fan drive circuit (2).

10. An air-source heat pump system, characterized in that, The air source heat pump system includes: the drive device (A) as described in claim 1, the fan (7), and the heat pump (8); The DC side of the drive device (A) is connected to the electrical terminal of the fan (7), and the DC side of the drive device (A) is connected to the electrical terminal of the heat pump (8).

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