CN107560128A - Air-conditioner control box and air conditioner - Google Patents

Abstract

The present invention proposes an air conditioner control box and the air conditioner, the air conditioner control box includes a filter, and an integrated drive module for driving the operation of the compressor motor and the fan motor of the outdoor unit of the air conditioner, the filter The input end of the filter is connected to the output end of the grid AC power supply, the output end of the filter is connected to the input end of the integrated drive module, and the output end of the integrated drive module is respectively connected to the input of the compressor motor and the fan motor end connection; the air conditioner is provided with the aforementioned air conditioner control box. The air conditioner control box and the air conditioner of the present invention have fewer electrical components and simple wiring, which is beneficial to improve work efficiency and aesthetics.

Description

Air conditioner control box and air conditioner

technical field

The invention belongs to the field of air conditioning, in particular to an air conditioner control box and an air conditioner.

Background technique

The air conditioner control box is installed on the outdoor unit of the air conditioner, and is used to drive the compressor motor and fan motor of the outdoor unit, including compressor motor frequency converter, compressor motor variable frequency drive, fan motor frequency converter and fan motor variable frequency drive, etc. electrical components. There are many electrical components inside the air conditioner control box, and the wiring between the various electrical components is complex. During the production and assembly process, the air conditioner control box requires many production processes, which not only leads to low production efficiency, but also affects the quality of the air conditioner control box. aesthetics.

Chinese patent CN 101109554B discloses a one-to-multi-type air conditioner, including a plurality of indoor units and an outdoor unit connected to each indoor unit respectively; the outdoor unit is provided with a control box; the control box includes: drive compression A compressor control module for the motor; a fan drive module for controlling the fan of the outdoor unit; a noise filter module for filtering the noise of the three-phase AC power supply; and a main control module for controlling the communication with each indoor unit and controlling the modules; The compressor control module described above includes an intelligent function module. The present invention only modularizes the control components of the compressor, does not improve the setting and wiring of other electrical components in the air conditioner control box, cannot effectively reduce the production process and materials of the air conditioner control box, and furthermore cannot improve the control of the air conditioner. Box productivity and aesthetics.

Therefore, it is very necessary for those skilled in the art to design an air conditioner control box that has fewer electrical components and simple wiring, has higher work efficiency during production and assembly, and has higher aesthetics.

Contents of the invention

Aiming at the technical problems of low production efficiency and poor aesthetics of the air conditioner control box, the present invention proposes an air conditioner control box and an air conditioner, which have fewer electrical components and simple wiring, which is conducive to improving work efficiency and aesthetics.

In order to achieve said purpose, the technical scheme adopted in the present invention is:

An air conditioner control box, which is arranged on the outdoor unit of the air conditioner, includes a filter for filtering the noise of the three-phase AC power supply, the input end of the filter is connected to the output end of the grid AC power supply, and the air conditioner The control box includes an integrated drive module for driving the compressor motor and the fan motor of the outdoor unit, the output end of the filter is connected to the input end of the integrated drive module, and the output ends of the integrated drive module are respectively It is connected with the input ends of the compressor motor and the fan motor; the integrated drive module includes a rectification circuit for converting alternating current into direct current, and is used for inverting direct current into frequency-adjustable alternating current to drive the compressor motor The compressor motor frequency converter that is running, and the fan motor frequency converter used to invert the direct current into frequency-adjustable alternating current to drive the fan motor, the input end of the rectification circuit is connected to the output end of the filter, so The output ends of the rectification circuit are respectively connected to the input ends of the compressor motor frequency converter and the fan motor frequency converter, the output ends of the compressor motor frequency converter are connected to the input ends of the compressor motor, and the fan motor The output end of the frequency converter is connected with the input end of the fan motor.

Preferably, the integrated drive module includes a compressor motor variable frequency drive for adjusting the inverter frequency of the compressor motor frequency converter, and the compressor motor variable frequency drive is electrically connected to the compressor motor frequency converter.

Preferably, the integrated drive module includes a fan motor variable frequency drive for adjusting the inverter frequency of the fan motor frequency converter, and the fan motor variable frequency drive is electrically connected to the fan motor frequency converter.

Preferably, the integrated drive module includes a smoothing capacitor for filtering the rectified DC ripple voltage, the smoothing capacitor is connected in parallel to the output end of the rectification circuit, and there are multiple smoothing capacitors in series, each of the smoothing capacitors Capacitors are connected in parallel with balancing resistors.

Preferably, the integrated drive module includes an electromagnetic switch for preventing inrush current from occurring in the smoothing capacitor, the input end of the electromagnetic switch is connected to the output end of the rectification circuit, the output end of the electromagnetic switch is connected to the smoothing capacitor The negative terminal of the capacitor is connected.

Preferably, it includes a PFC inductance that can improve the power factor of the air conditioner, and the PFC inductance is connected in parallel between the smoothing capacitor and the frequency converter of the compressor motor and the frequency converter of the fan motor.

Preferably, the integrated drive module includes protection circuits for respectively monitoring the states of the variable frequency drive for the compressor motor and the variable frequency drive for the fan motor, and controls for respectively controlling the actions of the variable frequency drive for the compressor motor and the variable frequency drive for the fan motor The input end of the protection circuit is connected to the output end of the compressor motor variable frequency drive and the fan motor variable frequency drive respectively, the output end of the protection circuit is connected to the input end of the controller, and the controller outputs The terminals are respectively connected to the input terminals of the compressor motor variable frequency drive and the fan motor variable frequency drive.

Preferably, the integrated drive module includes a power supply for providing driving voltage, and the output terminals of the power supply are respectively connected to the compressor motor frequency converter, fan motor frequency converter, compressor motor variable frequency drive, fan motor variable frequency drive and control Connector input terminal.

Preferably, the air conditioner control box includes a main control module for collecting and analyzing the working state information of the air conditioner and sending control instructions, and the main control module is electrically connected with the controller to transmit control instructions to the air conditioner. Describe compressor motor frequency converter, fan motor frequency converter.

An air conditioner, comprising an outdoor unit, the outdoor unit is provided with a compressor motor and a fan motor, the outdoor unit is provided with the aforementioned air conditioner control box, and the air conditioner control box is connected to the compressor motor and the fan motor respectively Motor electrical connection.

Compared with prior art, advantage and positive effect of the present invention are:

1. The air conditioner control box of the present invention integrates the rectifier circuit, the compressor motor frequency converter and the fan motor frequency converter into an integrated drive module capable of driving the compressor motor and the fan motor respectively. The drive module is a complete circuit board and is independent from other electrical components in the air conditioner control box, which greatly reduces the electrical components and wiring in the air conditioner control box, which not only helps to shorten the production process and improve production efficiency, but also Has a high degree of aesthetics.

2. In the air conditioner of the present invention, the air conditioner control box of the outdoor unit is provided with an integrated drive module, and the rectification circuit, the compressor motor frequency converter and the fan motor frequency converter are integrated on one module, which greatly reduces the air conditioner The electrical components in the air conditioner control box and the wiring between the various electrical components not only improve the production efficiency, but also improve the aesthetics of the air conditioner control box.

Description of drawings

Fig. 1 is the structural representation of air conditioner control box of the present invention;

Fig. 2 is the circuit schematic diagram of the air conditioner control box of the present invention;

Fig. 3 is the structural representation of integrated control module of the present invention;

Fig. 4 is a schematic circuit diagram of the integrated control module of the present invention.

In the above figures: 1. Filter; 2. Compressor motor; 3. Fan motor; 4. Integrated drive module; 41. Rectifier circuit; 42. Compressor motor inverter; 43. Fan motor inverter; 44. Compression 45. Variable frequency drive for fan motor; 46. Smoothing capacitor; 47. Balance resistor; 48. Electromagnetic switch; 481. Switch element; 482. Current limiting resistor; 49. Protection circuit; 410. Controller; 411. Power supply; 5. PFC inductor; 6. Main control module.

detailed description

In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "front", "rear" etc. are based on the The positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

As shown in Figure 1 and Figure 2, the present invention proposes an air conditioner control box, which is arranged on the outdoor unit of the air conditioner, the outdoor unit is provided with a compressor and a fan, and the compressor is installed with a The frequency drives the compressor motor 2 of the compressor to run, and the fan motor 3 capable of driving the fan to run according to the command frequency is installed in the fan, and the air conditioner control box is used to drive the compressor motor 2 and the fan motor 3 Operate and adjust the running frequency of the compressor motor 2 and the fan motor 3 . The control box of the air conditioner of the present invention includes a filter 1 and an integrated drive module 4 connected in sequence, that is, the output end of the filter 1 is connected to the input end of the integrated drive module 4; the input end of the filter 1 is connected to the external The power grid is connected and can filter the noise of the three-phase alternating current of the external power grid, that is, the noise frequency other than the specific frequency of the three-phase alternating current is effectively filtered to provide the integrated drive module 4 with a power signal of a specific frequency; the integrated drive module 4 is used for respectively drive the compressor motor 2 and the fan motor 3 of the outdoor unit to operate and adjust the operating frequency of the compressor motor 2 and the fan motor 3, and the output terminals of the integrated drive module 4 are connected to the compressor motor 2 and the fan motor 3 respectively. Fan motor 3 connection.

Specifically, referring to Fig. 3 and Fig. 4, the integrated drive module 4 includes a rectifier circuit 41, a compressor motor inverter 42 and a fan motor inverter 43, and the input end of the rectifier circuit 41 is connected to the output of the filter 1 terminal connection, thereby rectifying the alternating current outputted by the output end of the filter 1 into direct current; the input ends of the compressor motor frequency converter 42 and the fan motor frequency converter 43 are respectively connected with the output ends of the rectification circuit 41, thereby the The direct current at the output end of the rectifier circuit 41 is inverted into an alternating current with adjustable frequency; the output end of the compressor motor inverter 42 is connected to the compressor motor 2, so that the specific frequency of the compressor motor inverter 42 is inverted The alternating current is input to the compressor motor 2 to drive the compressor motor 2 to run; the output end of the fan motor frequency converter 43 is connected to the fan motor 3, so that the fan motor frequency converter 43 is inverter-specific Frequency alternating current is input to the fan motor 3 to drive the fan motor 2 to run.

The air conditioner control box of the present invention integrates the rectification circuit 41, the compressor motor frequency converter 42 and the fan motor frequency converter 43 into an integrated drive module 4 capable of driving the compressor motor 2 and the fan motor 3 respectively. , the integrated drive module 4 is a complete circuit board and is independent of other electrical components in the air conditioner control box, greatly reducing the electrical components and wiring in the air conditioner control box, not only helping to shorten the production process Thereby, the production efficiency is improved, and it has high aesthetics.

Continue referring to FIG. 3 and FIG. 4, the integrated drive module 4 further includes a compressor motor variable frequency driver 44, and the compressor motor variable frequency driver 44 is used to adjust and control the inverter frequency of the compressor motor frequency converter 42, so The compressor motor variable frequency drive 44 and the compressor motor frequency converter 42 are electrically connected and communicate with each other, that is, the compressor motor variable frequency drive 44 can send instructions to the compressor motor frequency converter 42 to control the compressor The inverter frequency of the motor inverter 42, the compressor motor inverter 42 can feed back the actual inverter frequency of the compressor motor inverter 42 to the compressor motor variable frequency driver 44, and the compressor motor variable frequency driver 44 The inverter frequency command is adjusted according to the feedback signal so that the inverter frequency of the compressor motor inverter 42 meets the preset requirements, thereby further improving the precise control performance of the air conditioner control box of the present invention.

Further, the integrated drive module 4 further includes a fan motor variable frequency driver 45, the fan motor variable frequency driver 45 is used to adjust and control the inverter frequency of the fan motor frequency converter 43, the fan motor variable frequency driver 45 and the fan motor The motor frequency converter 43 is electrically connected and communicates with each other, that is, the fan motor variable frequency driver 45 can send instructions to the fan motor frequency converter 43 to control the inverter frequency of the fan motor frequency converter 43, and the fan motor frequency converter 43 can feed back the actual inverter frequency of the fan motor frequency converter 43 to the fan motor frequency conversion controller 45, and the fan motor frequency conversion controller 45 adjusts the inverter frequency command according to the feedback signal, so that the fan motor The inverter frequency of the frequency converter 43 meets the preset requirements, thereby further improving the precise control performance of the air conditioner control box of the present invention.

As a preference, continue to refer to FIG. 3 and FIG. 4 , the integrated drive module 4 further includes a smoothing capacitor 46, and the smoothing capacitor 46 is connected in parallel to the output end of the rectification circuit 41, thereby reducing the DC current at the output end of the rectification circuit 41. The AC pulsation ripple coefficient, thereby making the DC voltage at the output end of the rectifier circuit 41 stable, and reducing the influence of the AC pulsation ripple on the compressor motor inverter 42 and the fan motor inverter 43. Preferably, there are multiple smoothing capacitors 46 , and the multiple smoothing capacitors 46 are connected in series, and in order to improve the stability of the smoothing capacitors 46 , each of the smoothing capacitors 46 is connected in parallel with a balancing resistor 47 .

Further, in order to prevent the danger caused by excessive current when the smoothing capacitor 46 starts to work, an electromagnetic switch 48 is provided between the rectification circuit 41 and the smoothing capacitor 46 to prevent the smoothing capacitor 46 from inrush. The electromagnetic switch 48 includes at least one switch element 481, and a current-limiting resistor 482 connected in parallel with the switch element 481, and the input terminals of the switch element 481 and the current-limiting resistor 482 are connected to the switching element 481 and the current-limiting resistor 482. The output terminal is connected, and the output terminal of the electromagnetic switch 48 is connected to the negative pole of the smoothing capacitor 46; when the air conditioner control box of the present invention is just connected to the external power supply, the switching element 481 is in an off state, and the rectifier circuit 41 The direct current at the output end is applied to the smoothing capacitor 46 through the current-limiting resistor 482, so that the smoothing capacitor 46 is charged slowly. After the smoothing capacitor 46 is fully charged, the switch The element 481 is closed, thereby preventing the smoothing capacitor 46 from inrush.

Continue referring to Fig. 1, Fig. 2, the control box of the air conditioner of the present invention further comprises the PFC inductance 5 that can improve the power factor of the air conditioner, and the PFC inductance 5 is connected in parallel to the smoothing capacitor 46 and the compressor motor frequency converter 42, Between the fan motor inverter 43, thereby improving the power utilization rate of the air conditioner.

Continue referring to FIG. 3 and FIG. 4, the integrated drive module 4 further includes a protection circuit 49 and a controller 410, and the protection circuit 49 can monitor the working states of the compressor motor variable frequency drive 44 and the fan motor variable frequency drive 45 respectively ( Including whether signals such as voltage, current, temperature deviate from the safe range), when the working state of the compressor motor variable frequency drive 44 or the fan motor variable frequency drive 45 deviates from the safe range, the controller 410 can send an alarm signal and send control instructions to The compressor motor variable frequency driver 44 or the fan motor variable frequency driver 45, so that the compressor motor variable frequency driver 44 or the fan motor variable frequency driver 45 is shut down; the input end of the protection circuit 49 is connected with the compressor motor variable frequency driver respectively 44 and the output end of the fan motor variable frequency driver 45 are connected to collect the working state signals of the compressor motor variable frequency driver 44 and the fan motor variable frequency driver 45 in real time, the output end of the protection circuit 49 is connected with the input end of the controller 410 Connect to send the working status signal of the compressor motor variable frequency driver 44 and the fan motor variable frequency driver 45 to the controller 410; the output terminal of the controller 410 is connected with the compressor motor variable frequency driver 44 and the fan motor The input end of the variable frequency driver 45 is connected to send control commands to the compressor motor variable frequency driver 44 and the fan motor variable frequency driver 45 respectively, so as to control the compressor motor variable frequency driver 44 and the fan motor variable frequency driver 45 respectively.

Further, the integrated drive module 4 further includes a power supply 411 that can provide driving voltage for each electrical component inside the integrated drive module 4, and the output end of the power supply 411 is connected to the compressor motor frequency converter 42 and the fan motor respectively. The frequency converter 43 , the compressor motor variable frequency driver 44 , the fan motor variable frequency driver 45 are connected to the input end of the controller 410 .

It should be noted that the air conditioner control box of the present invention further includes a main control module 6, which can collect and analyze user instructions (including cooling, heating, dehumidification, etc.) received by the air conditioner indoor unit, The working status signal of the air conditioner (including the return air temperature of the indoor unit, the outlet air temperature, the indoor temperature, the opening of the valve body, the refrigerant pipeline pressure, etc.), the main control module 6 collects and analyzes the user instruction and After the working state signal forms a control command, and sends the control command to the controller 410 in the integrated drive module 4, the controller 410 receives the control command and transmits it to the compressor motor variable frequency drive 44 respectively and the fan motor variable frequency driver 45; the compressor motor variable frequency driver 44 receives the control command and calculates the inverter frequency signal of the compressor motor frequency converter 42, and sends it to the compressor motor frequency converter 42, the The fan motor variable frequency driver 45 calculates the inverter frequency signal of the fan motor inverter 43 after receiving the control command, and sends it to the fan motor inverter 43; the compressor motor inverter 42 calculates the inverter frequency signal according to the inverter frequency The signal applies AC power of a specific frequency to the compressor motor 2, and the fan motor frequency converter 43 applies AC power of a specific frequency to the fan motor 3 according to the inverter signal, thereby realizing , the working state of the outdoor unit and user instructions to adjust the running frequency of the compressor motor 2 and the fan motor 3 respectively, so that the air conditioner has higher comfort.

The present invention further proposes an air conditioner, including an outdoor unit, the outdoor unit is provided with a compressor motor 2 and a fan motor 3, and the aforementioned air conditioner control box is arranged in the outdoor unit, and the air conditioner control box is connected with the air conditioner control box respectively. The compressor motor 2 is electrically connected to the fan motor 3, which will not be described in detail here.

In the air conditioner of the present invention, the air conditioner control box of its outdoor unit is provided with an integrated drive module 4, thereby integrating the rectification circuit 41, the compressor motor frequency converter 42 and the fan motor frequency converter 43 into independent modules, greatly reducing the The electrical components in the air conditioner control box and the wiring between the various electrical components not only improve the production efficiency, but also improve the aesthetics of the air conditioner control box.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solution formed by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (10)

1. a kind of air-conditioner control box, it is arranged on the outdoor unit of the air conditioner, including made an uproar for filtering three-phase alternating-current supply The wave filter (1) of sound, the input of the wave filter (1) are connected with the output end of power network AC power, it is characterised in that：It is described Air-conditioner control box includes the integrated driving for being used for compressor electric motor (2) and fan electromotor (3) operating for driving the outdoor unit Module (4), the output end of the wave filter (1) are connected with the input of the Integrate Design (4), the integrated driving mould Input of the output end of block (4) respectively with the compressor electric motor (2), fan electromotor (3) is connected；

The Integrate Design (4) includes being used to convert alternating current to the commutating circuit (41) of direct current, for by direct current Electric inversion for frequency-adjustable alternating current with drive the compressor electric motor (2) operate compressor electric motor frequency converter (42), with And the fan electromotor frequency converter for DC inverter to be operated for the alternating current of frequency-adjustable with driving fan motor (3) (43), the input of the commutating circuit (41) is connected with the output end of the wave filter (1), the commutating circuit (41) it is defeated Go out input of the end respectively with the compressor electric motor frequency converter (42) and fan electromotor frequency converter (43) to be connected, the compressor The output end of motor inverter (42) is connected with the input of the compressor electric motor (2), the fan electromotor frequency converter (43) Output end be connected with the input of the fan electromotor (3).

2. air-conditioner control box according to claim 1, it is characterised in that：The Integrate Design (4) includes being used for Adjust the compressor electric motor variable frequency drives (44) of compressor electric motor frequency converter (42) reverse frequency, the compressor electric motor Variable frequency drives (44) are electrically connected with the compressor electric motor frequency converter (42).

3. air-conditioner control box according to claim 1, it is characterised in that：The Integrate Design (4) includes being used for The fan electromotor variable frequency drives (45) of fan electromotor frequency converter (43) reverse frequency are adjusted, the fan electromotor frequency conversion is driven Dynamic device (45) is electrically connected with the fan electromotor frequency converter (43).

4. air-conditioner control box according to claim 1, it is characterised in that：The Integrate Design (4) includes being used for The smoothing capacity (46) of the direct current ripple voltage after rectification is filtered, the smoothing capacity (46) is parallel to the commutating circuit (41) output end, the smoothing capacity (46) are in series with multiple, and each smoothing capacity (46) is parallel with balance resistance (47)。

5. air-conditioner control box according to claim 4, it is characterised in that：The Integrate Design (4) includes being used for Prevent the electromagnetic switch (48) that the smoothing capacity (46) shoves, input and the rectification of the electromagnetic switch (48) The output end connection in loop (41), the output end of the electromagnetic switch (48) are connected with the negative pole of the smoothing capacity (46).

6. air-conditioner control box according to claim 4, it is characterised in that：Including the air conditioner power factor can be improved PFC inductance (5), the PFC inductance (5) be connected in parallel in the smoothing capacity (46) and compressor electric motor frequency converter (42), Between fan electromotor frequency converter (43).

7. according to the air-conditioner control box described in claim any one of 1-6, it is characterised in that：The Integrate Design (4) Including the guarantor for monitoring the compressor electric motor variable frequency drives (44) and fan electromotor variable frequency drives (45) state respectively Protect loop (49), and for controlling the compressor electric motor variable frequency drives (44) and fan electromotor variable frequency drives respectively (45) controller (410) of action, the input of the protective loop (49) respectively with the compressor electric motor variable frequency drives (44) output end with fan electromotor variable frequency drives (45) connects, output end and the controller of the protective loop (49) (410) input connection, controller (410) output end respectively with the compressor electric motor variable frequency drives (44) and wind Fan the input connection of motor variable-frequency driver (45).

8. air-conditioner control box according to claim 7, it is characterised in that：The Integrate Design (4) includes being used for The power supply (411) of driving voltage is provided, the output end of the power supply (411) respectively with the compressor electric motor frequency converter (42), Fan electromotor frequency converter (43), compressor electric motor variable frequency drives (44), fan electromotor variable frequency drives (45) and controller (410) input connects.

9. air-conditioner control box according to claim 7, it is characterised in that：Including for gathering and analyzing the air conditioner Work state information and send the main control module (6) of control instruction, institute's main control module (6) and the controller (410) It is electrically connected with to transmit control instruction to the compressor electric motor frequency converter (42), fan electromotor frequency converter (43).

10. a kind of air conditioner, including outdoor unit, the outdoor unit is provided with compressor electric motor (2) and fan electromotor (3), and it is special Sign is：The outdoor unit sets the air-conditioner control box described in just like claim any one of 1-9, the air-conditioner control box It is electrically connected with respectively with the compressor electric motor (2) and fan electromotor (3).