CN222363945U - Air conditioner and power supply assembly thereof - Google Patents

Abstract

The utility model provides an air conditioner and a power supply component thereof. The air conditioner power supply component includes: an indoor unit control board, including a first power component group, the first power component group includes an indoor unit communication circuit; and an outdoor unit control board, including an outdoor unit communication circuit, which is connected to the indoor unit communication circuit by means of a power line carrier, and obtains working power from the outdoor unit control board through the power line when the first power component group is powered off. The utility model has the advantages that when the indoor unit is abnormally powered off, the energy consumption of non-essential loads can be reduced, the overall power consumption of the indoor unit can be reduced, and the power supply stability of the outdoor unit can be guaranteed.

Description

Air conditioner and power supply assembly thereof

Technical Field

The utility model relates to the field of air conditioners, in particular to an air conditioner and a power supply assembly thereof.

Background

An air conditioner generally includes an indoor unit and an outdoor unit, which communicate through an indoor and outdoor unit communication circuit. Under the normal working condition, the commercial power is respectively input into the indoor unit and the indoor unit, so that the normal operation of the indoor unit and the outdoor unit is maintained.

However, when the power supply of the indoor unit is lost, for example, when a user turns off the power supply of the indoor unit indoors or trips indoors, the power supply of the indoor unit does not flow in, and communication with the outdoor unit cannot be maintained, so that communication faults of the indoor unit and the outdoor unit are caused.

For this reason, in the related art, it is proposed to perform communication between an indoor unit and an outdoor unit by means of a power line carrier system, and to supply power to the indoor unit from the outdoor unit through the power line when the indoor unit is powered off.

However, when the power consumption load of the indoor unit is large, the consumption current on the communication line is overlarge, the external switch power supply is in a heavy-load working state, and especially when the multi-connected external unit is used for one-to-many internal units, the consumption current is larger, the voltage of the switch power supply is unstable, and even the problem that the switch power supply is protected and has no weak current output can be caused.

Disclosure of utility model

An object of the first aspect of the present utility model is to enable the first electric component group to acquire the operating power from the outdoor unit control board through the power line in the event of abnormal power failure, thereby reducing the energy consumption of unnecessary loads and thus reducing the overall power consumption of the indoor unit.

Another object of the first aspect of the present utility model is to utilize a power control switch to reasonably control the power on and off of the second power consuming component.

A further object of the second aspect of the present utility model is to realize real-time monitoring of the external power state of the indoor unit and precise control of the power supply of the second power consumption component group by using the commercial power detection circuit, the main controller and the power control switch to cooperate.

In particular, according to a first aspect of the present utility model, there is provided an air conditioner power supply assembly comprising:

An indoor unit control board comprising a first electric component group, wherein the first electric component group comprises an indoor unit communication circuit, and

The outdoor unit control board comprises an outdoor unit communication circuit, the outdoor unit communication circuit is in communication connection with the indoor unit communication circuit through a power line carrier mode, and the first electric component group acquires a working power supply from the outdoor unit control board through the power line under the condition of abnormal power failure.

Optionally, the indoor unit control board further comprises a second electricity-using component group and a power supply control switch, the first electricity-using component group and the power supply control switch are respectively connected with an external power supply of the indoor unit, the second electricity-using component group is connected with the power supply control switch, and the power supply control switch is used for controlling the power supply on-off of the second electricity-using component group in a controlled manner.

Optionally, the indoor unit control board further includes a mains supply detection circuit and a main controller, the main controller is connected with the mains supply detection circuit and the power control switch respectively, and when the mains supply detection circuit detects that the external power supply is abnormal, the first electric component group provides working power for the main controller and the power control switch, and the main controller controls the power control switch to be disconnected.

Optionally, the mains supply detection circuit includes a first isolation device, where the first isolation device is connected to an external power supply of the indoor unit and the main controller, and the first isolation device is turned on under a condition that mains supply input of the external power supply is normal, and turned off under a condition that mains supply input is abnormal.

Optionally, the indoor unit control board further comprises an indoor unit power supply circuit and an indoor unit switch power supply, wherein the input end of the indoor unit power supply circuit is connected with an external power supply of the indoor unit, the output end of the indoor unit power supply circuit is connected with the input end of the indoor unit switch power supply, and the indoor unit control board is configured to convert commercial power input by the external power supply into direct current;

And the output end of the indoor unit switching power supply is respectively connected with the first electric component group and the power supply control switch and is configured to convert the input direct current into multiple paths of voltages.

Optionally, the commercial power detection circuit includes a second isolation device, where the second isolation device is connected to the indoor unit switching power supply and the main controller respectively, and the second isolation device is turned on under a condition that weak current output of the indoor unit switching power supply is normal, and turned off under a condition that weak current output is abnormal.

Optionally, the commercial power detection circuit is a voltage detection circuit or a current detection circuit.

Optionally, the first electric component group further includes a dc converter, and the indoor unit communication circuit provides working power to the main controller and the power control switch through the dc converter when the commercial power detection circuit detects that the external power is abnormal.

Optionally, the second power-consuming component group includes, but is not limited to, a display panel control unit, a panel control unit, and a fan control unit.

Optionally, the power control switch is a triode, a MOS tube, a relay or a photoelectric isolator.

Optionally, the outdoor unit control board further comprises an outdoor unit power supply circuit and an outdoor unit switch power supply, wherein the input end of the outdoor unit power supply circuit is connected with an external power supply of the outdoor unit, the output end of the outdoor unit power supply circuit is connected with the input end of the outdoor unit switch power supply, and the outdoor unit control board is configured to convert commercial power input by the external power supply into direct current;

The output end of the outdoor unit switching power supply is connected with the indoor unit communication circuit and is configured to convert the input direct current into multiple paths of voltages.

According to a second aspect of the present utility model, there is provided an air conditioner comprising an air conditioner power supply assembly as defined in any one of the above.

The first electric component group of the indoor unit control board comprises the indoor unit communication circuit, the indoor unit communication circuit is in communication connection with the outdoor unit communication circuit of the outdoor unit control board in a power line carrier mode, and under the condition of abnormal power failure, the first electric component group can acquire a working power supply from the outdoor unit control board through a power line, so that necessary components of the indoor unit can still work, the energy consumption of unnecessary loads is reduced, the overall power consumption of the indoor unit is reduced, and the power stability of the outdoor unit is ensured.

Further, in the air conditioner power supply assembly, the first power component group and the power control switch of the indoor unit control board are respectively connected with an external power supply of the indoor unit, the second power component group is connected with the power control switch, and the power on-off of the second power component group is controlled through the power control switch. In this way, in the event of abnormal power outage of the indoor unit, by turning off the power control switch, it is possible to prevent the operating power acquired from the indoor unit control board by the first electric component group from being supplied to the second electric component group.

Further, in the air conditioner power supply assembly, the main controller is respectively connected with the mains supply detection circuit and the power supply control switch, and when the mains supply detection circuit detects that the external power supply is abnormal, the first electric component group can provide working power supply for the main controller and the power supply control switch, so that the main controller controls the power supply control switch to be disconnected. Through the collaborative work of the commercial power detection circuit, the main controller and the power control switch, the real-time monitoring of the external power state of the indoor unit and the accurate control of the power supply of the second power utilization component group can be realized.

The above, as well as additional objectives, advantages, and features of the present utility model will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present utility model when read in conjunction with the accompanying drawings.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

Fig. 1 is a schematic block diagram of an air conditioner power supply assembly according to one embodiment of the present utility model;

Fig. 2 is a schematic structural view of an air conditioner power supply assembly according to another embodiment of the present utility model;

Fig. 3 is a schematic structural view of an air conditioner according to an embodiment of the present utility model.

Reference numerals:

1. The indoor unit comprises an air conditioner, 10, an indoor unit, 100, an indoor unit control board, 110, an indoor unit power supply circuit, 120, an indoor unit switching power supply, 130, a main controller, 140, a first electric component group, 141, an indoor unit communication circuit, 142, a direct current converter, 143, a nonvolatile memory, 144, an electronic expansion valve, 150, a second electric component group, 151, a display panel control unit, 152, a stepping motor control unit, 153, a direct current fan control unit, 154, a panel control unit, 160, a mains supply detection circuit, 170, a power supply control switch, 20, an outdoor unit, 200, an outdoor unit control board, 210, an outdoor unit power supply circuit, 220, an outdoor unit switching power supply, 230, an outdoor unit communication circuit, 300 and a power line.

Detailed Description

Reference now will be made in detail to embodiments of the utility model, one or more examples of which are illustrated in the drawings. The various embodiments are provided to illustrate the utility model and not to limit the utility model. Indeed, various modifications and variations of the present utility model will be apparent to those of ordinary skill in the art without departing from the scope or spirit of the present utility model. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield still further embodiments. Accordingly, it is intended that the present utility model cover such modifications and variations as come within the scope of the appended claims and their equivalents.

An air conditioner 1 and a power supply assembly thereof according to an embodiment of the present utility model will be described below with reference to fig. 1 to 3. Where the positional or positional relationship indicated by "inner", "outer", "upper", "lower", etc. is based on the positional or positional relationship shown in the drawings, this is for convenience of description and simplification of the description only, and is not an indication or suggestion that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. To facilitate the construction of the illustrative device, some of the figures of the present utility model are illustrated in perspective.

In the description of the present embodiment, it is to be understood that the term "plurality" means at least two, for example, two, three, etc. Unless explicitly specified otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

In the description of the present embodiment, the descriptions of the terms "one embodiment," "some embodiments," "some examples," "one example," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present utility model provides a power supply assembly of an air conditioner 1, fig. 1 is a schematic structural diagram of the power supply assembly of the air conditioner 1 according to one embodiment of the present utility model, which shows an operating state of the power supply assembly when an indoor unit 10 is normally powered on, and fig. 2 is a schematic structural diagram of the power supply assembly of the air conditioner 1 according to another embodiment of the present utility model, which shows an operating state of the power supply assembly when the indoor unit 10 is abnormally powered off, wherein solid arrows represent current transmission directions, and hollow arrows represent signal transmission directions, as shown in fig. 1 and 2, the power supply assembly of the air conditioner 1 at least comprises an indoor unit control board 100 and an outdoor unit control board 200.

The indoor unit control board 100 is applied to the indoor unit 10 of the air conditioner 1, the indoor unit control board 100 includes a first electric component group 140, each component in the first electric component group 140 is a necessary functional load of the indoor unit 10, and needs to keep working when the indoor unit 10 is abnormally powered off, and the first electric component group 140 includes at least an indoor unit communication circuit 141.

The outdoor unit control board 200 is applied to the indoor unit 10 of the air conditioner 1, the outdoor unit control board 200 at least comprises an outdoor unit communication circuit 230, the outdoor unit communication circuit 230 and the indoor unit communication circuit 141 are in communication connection through a power line 300 carrier mode, and the first electric component group 140 acquires an operating power supply from the outdoor unit control board 200 through the power line 300 in the event of abnormal power failure.

In the normal operation state of the air conditioner 1, the indoor unit 10 and the outdoor unit 20 are independently powered by respective external power sources, and the first electric component group 140 of the indoor unit 10, including the key indoor unit communication circuit 141, is directly powered by the external power source of the indoor unit 10, so as to ensure the normal operation thereof. At this time, the power line 300 between the indoor unit communication circuit 141 and the outdoor unit communication circuit 230 mainly performs a communication function, so as to ensure that the information transmission between the indoor unit and the outdoor unit is smooth.

However, when the indoor unit 10 is abnormally powered off, for example, the user actively turns off the external power supply of the indoor unit 10 or suddenly trips the external power supply of the indoor unit 10 for some reason, the external power supply of the indoor unit 10 cannot supply the electric power required for normal operation to the first electric component group 140. In such an emergency, the power line 300 between the indoor unit communication circuit 141 and the outdoor unit communication circuit 230 not only continues to take on the communication function, but also takes on an important role of power transmission.

The first electric component group 140 can obtain a required operation power from the outdoor unit control board 200 through the power line 300 carrier technology. This design allows the first electrical component set 140, and in particular the indoor unit communication circuit 141, to maintain its normal operation in the event of an abnormal power outage of the indoor unit 10, ensuring smooth communication between the indoor and outdoor units, thereby allowing the indoor unit 10 to perform some critical operations, such as closing valves, etc., to prevent damage to the system or risk.

In some embodiments, the indoor unit control board 100 further includes a second power consumption component set 150 and a power control switch 170, the first power consumption component set 140 and the power control switch 170 are respectively connected to an external power source of the indoor unit 10, the second power consumption component set 150 is connected to the power control switch 170, and the power control switch 170 controllably controls the power on/off of the second power consumption component set 150.

In the normal operation state of the air conditioner 1, the external power source of the indoor unit 10 may directly supply power to the first power component group, and indirectly supply power to the second power component group 150 through the power control switch 170.

In the normal operation state of the air conditioner 1, the external power supply of the indoor unit 10 can directly supply power to the first electric component group 140, ensure the normal operation of the necessary loads such as the indoor unit communication circuit 141, and indirectly supply the required electric energy to the second electric component group 150 through the power control switch 170. In this way, the second electricity-consuming component group 150 can also be provided with stable power supply when necessary as an unnecessary functional load of the indoor unit 10.

However, when the indoor unit 10 is abnormally powered off, the power control switch 170 may be automatically turned off, preventing the operating power acquired from the outdoor unit control board 200 by the first power component group 140 from being supplied to the second power component group 150 by mistake. In this way, it is possible to ensure that the normal operation of the first electric component group 140 is preferentially ensured in the case of limited operating power, while avoiding unnecessary energy consumption and potential safety risks.

Specifically, when the indoor unit 10 is abnormally powered off, the first electric component group 140 obtains an operating power from the outdoor unit control board 200 through the power line 300 to maintain normal operation of basic functions such as communication. The second power consumption component set 150, as an unnecessary functional load, is cut off by the power control switch 170 to stop the operation. This not only reduces the power consumption of unnecessary loads and the overall power consumption of the indoor unit 10, but also ensures the power stability of the outdoor unit 20 and prevents the normal operation of the outdoor unit 20 from being affected by the continued operation of the second power consumption component group 150.

In some embodiments, the indoor unit control board 100 further includes a mains detection circuit 160 and a main controller 130, the main controller 130 is connected to the mains detection circuit 160 and the power control switch 170, respectively, and in case that the mains detection circuit 160 detects an abnormality of the external power supply, the first electric component group 140 provides an operating power to the main controller 130 and the power control switch 170, and the main controller 130 controls the power control switch 170 to be turned off.

The mains supply detection circuit 160 is mainly used for detecting the external power supply state of the indoor unit 10, and monitoring whether the external power supply of the indoor unit 10 is normally powered or not in real time. Upon detecting an abnormality in the external power source, such as a power failure or voltage instability, the mains detection circuit 160 immediately sends a corresponding signal to the main controller 130.

The main controller 130 is a core component of the indoor unit control board 100, and is responsible for receiving and processing signals from various components or modules, and issuing corresponding control instructions. Upon receiving the anomaly signal from the mains detection circuit 160, the main controller 130 reacts quickly. Since the first power unit 140 has already acquired the operating power from the outdoor unit control board 200 through the power line 300 at this time, the main controller 130 continues to operate using the power.

Mainly, the main controller 130 will issue an off command to the power control switch 170. The power control switch 170 immediately disconnects the second power consuming component group 150 upon receiving the instruction, thereby cutting off the power supply thereof. In this way, even in the event of an abnormality in the external power supply, it is ensured that the second power consuming component group 150 does not continue to operate, thereby avoiding unnecessary energy consumption and potential safety risks.

Through the cooperation of the commercial power detection circuit 160, the main controller 130 and the power control switch 170, the indoor unit control board 100 can realize real-time monitoring of the external power state of the indoor unit 10 and precise control of the power supply of the second power utilization component group 150. The safety and the stability of the air conditioner 1 are improved, the energy consumption control is further optimized, and more reliable and efficient use experience is provided for users.

In a specific example, the mains detection circuit 160 may include a first isolation device, such as an optocoupler isolator, which is connected to the external power source of the indoor unit 10 and the main controller 130, respectively, and is turned on when the mains input of the external power source is normal, and turned off when the mains input is abnormal.

The first isolation device is used as a key component in the mains detection circuit 160 and is responsible for monitoring the mains input state of the external power supply. Specifically, one end of the first isolation device is connected to an external power source of the indoor unit 10, and the other end is connected to the main controller 130. When the mains input of the external power supply is normal, the first isolation device is in a conductive state, allowing current to pass, thereby transmitting a "power normal" signal to the main controller 130.

However, when an abnormality occurs in the mains input of the external power source, such as a power failure, unstable voltage, or an out of safety range, the first isolation device is rapidly turned off, cuts off the connection with the external power source, and transmits a signal of "power abnormality" to the main controller 130.

After receiving the abnormal signal, the main controller 130 will quickly respond according to the preset logic judgment and processing flow. Since the first electricity consumption component set 140 has already acquired the working power from the outdoor unit control board 200 through the power line 300 at this time, the main controller 130 can continue to work by using the part of the power and issue a command to the power control switch 170 to control the disconnection thereof, thereby ensuring that the second electricity consumption component set 150 does not continue to work due to the abnormality of the external power.

The introduction of the first isolation device can accurately monitor the mains supply input state of the external power supply in real time and quickly respond when abnormality is found, so that the safety and stability of the air conditioner 1 are ensured. Meanwhile, due to the use of the first isolation device, the whole detection process is safer and more reliable, and the safety risk possibly brought by directly detecting an external power supply is avoided.

In some embodiments, the indoor unit control board 100 further includes an indoor unit power supply circuit 110 and an indoor unit switching power supply 120, wherein an input end of the indoor unit power supply circuit 110 is connected to an external power supply of the indoor unit 10, and an output end is connected to an input end of the indoor unit switching power supply 120, and is configured to convert commercial power input by the external power supply into direct current. The output terminals of the indoor unit switching power supply 120 are respectively connected to the first electric component group 140 and the power control switch 170, and configured to convert the input direct current into multiple voltages.

Specifically, the indoor unit power supply circuit 110 is a key component for connecting an external power supply and the indoor unit switching power supply 120, and an input end of the key component is directly connected to the external power supply of the indoor unit 10 and is responsible for receiving the commercial power input by the external power supply. After receiving the mains supply, the indoor power supply circuit 110 converts the unstable ac mains supply into a stable and reliable dc power through a series of conversion and processing, and provides a stable power supply for the subsequent circuits.

The converted dc power is supplied to the input terminal of the indoor unit switching power supply 120. The indoor unit switching power supply 120 is a power module with multiple outputs, and is mainly used for further converting the input direct current into multiple outputs with different voltages. These different voltage outputs may meet the power requirements of the different components on the indoor unit control board 100.

The output terminal of the indoor unit switching power supply 120 is connected to the first electric component group 140 and the power control switch 170, respectively. This means that both the first electrical component group 140 and the power control switch 170 can obtain the required power from the indoor unit switching power supply 120. Since the indoor unit switching power supply 120 can provide stable and multi-path voltage output, it is ensured that the first power component group 140, the power control switch 170 and the second power component group 150 can be stably and reliably supplied with power.

In addition, the cooperation of the indoor unit power supply circuit 110 and the indoor unit switching power supply 120 further improves the efficiency of power supply management. The indoor unit power supply circuit 110 is responsible for converting the mains supply into direct current, and the indoor unit switching power supply 120 is responsible for converting the direct current into multiple voltage outputs. This division of labor makes the overall power management system more efficient and stable.

In another specific example, the utility power detection circuit 160 may include a second isolation device, such as an optocoupler isolator, which is different from the first isolation device in that the second isolation device connects the indoor unit switching power supply 120 and the main controller 130, respectively, and is turned on in case of normal weak current output of the indoor unit switching power supply 120 and turned off in case of abnormal weak current output.

The second isolation device is used as a key component in the commercial power detection circuit 160, one end of the second isolation device is connected with the indoor unit switching power supply 120, and the other end of the second isolation device is connected with the main controller 130. The indoor unit switching power supply 120 is responsible for converting direct current into multiple voltage outputs, including weak current outputs. These weak electrical outputs are used to power portions of the circuits or components on the indoor unit control board 100.

When the weak current output of the indoor unit switching power supply 120 is normal, the second isolation device is in a conductive state. This means that the normal state signal of the weak current output can be smoothly transferred to the main controller 130 through the second isolation device, so that the main controller 130 can confirm that the power state is good and continue to execute the corresponding control logic.

However, when an abnormality occurs in the weak current output of the indoor unit switching power supply 120, such as an unstable voltage, an out-of-range condition, or a complete failure, the second isolation device is rapidly turned off. This operation cuts off the connection to the indoor unit switching power supply 120 and transmits a weak current output abnormality signal to the main controller 130.

After receiving the abnormal signal, the main controller 130 reacts according to a preset logic judgment and processing flow. Since the first electric component group 140 has already acquired the operation power from the outdoor unit control board 200 through the power line 300 at this time, the main controller 130 can continue to operate using this portion of the power. The main controller 130 sends a command to the power control switch 170 to control the power control switch to be turned off, so as to ensure that the second power utilization component set 150 does not continue to operate due to the weak current output abnormality.

The introduction of the second isolation device can realize real-time monitoring and accurate judgment of the weak current output state of the indoor unit switching power supply 120, and can quickly respond when the weak current output is abnormal, and potential safety risks are prevented by switching off the power supply control switch 170, so that stable operation of the air conditioner 1 and safe use of users are ensured.

Of course, the first isolation device and the second isolation device may be used in combination in the mains detection circuit 160, so that the accuracy and reliability of detection are improved, and the main controller 130 can comprehensively and accurately know the external power state of the indoor unit 10. Once any abnormality is detected, the main controller 130 will react quickly, and the power control switch 170 is controlled to turn off the power of the second power unit set 150, thereby greatly reducing the risk of the air conditioner 1 failing and improving the user experience.

In some embodiments, the mains detection circuit 160 may be replaced entirely with a voltage detection circuit or a current detection circuit.

The voltage detection circuit is mainly used for detecting voltage signals in the circuit and judging the working state of the power supply. Such circuits are typically implemented using comparators that compare a voltage signal to be detected with a reference voltage and output a corresponding signal when the voltage signal exceeds or falls below the reference voltage. The voltage detection circuit can directly reflect the working state of the power supply, and is very applicable to application scenes in which accurate voltage control is required.

The current detection circuit is mainly used for detecting the current in the circuit and judging the working state or the load condition of the circuit. Such a circuit may be implemented by measuring the voltage drop in the circuit or using a dedicated current sensing element. The current detection circuit can provide more direct load information, and is very useful for application scenes in which load change needs to be monitored or the circuit needs to be protected from overcurrent damage.

The commercial power detection circuit 160 is replaced by a voltage detection circuit or a current detection circuit, and can be selected according to specific application requirements. The voltage detection circuit may be selected if the operating state of the power supply is of primary concern, and the current detection circuit may be selected if it is desired to monitor the load conditions or to protect the circuit from over-current damage. Of course, in the replacement process, factors such as design, cost, compatibility with other circuits, and the like of the circuit are also considered, which is not limited in this embodiment.

In a specific example, the first electric component set 140 may include an indoor unit communication circuit 141, a dc converter 142, a nonvolatile memory 143 (e.g., eeprom+flash) and an electronic expansion valve 144, and the second electric component set may include a display panel control unit 151, a stepping motor control unit 152, a dc fan control unit 153, a panel control unit 154 and other functional loads. Wherein,

The indoor unit communication circuit 141 is responsible for communication connection between the indoor unit 10 and the outdoor unit 20, and realizes transmission of control signals and data information. It ensures the cooperative work between the indoor unit 10 and the outdoor unit 20 to achieve the overall control of the air conditioner 1.

The dc converter 142 is responsible for converting the input dc power to a voltage level suitable for use by the various electrical components. The device can provide a stable working power supply and ensure the normal operation of all parts.

The nonvolatile memory 143 is used for storing control programs, parameter settings and other important data of the air conditioner 1, and has the characteristics of high-speed reading and writing, long data retention time and the like, so that the control logic and parameter settings of the air conditioner 1 can be kept unchanged after power failure.

The electronic expansion valve 144 is used for controlling the flow of the refrigerant, and the flow of the refrigerant is controlled by adjusting the opening of the valve, so that the accurate adjustment of the refrigerating or heating effect of the air conditioner 1 is realized. Accurate control of the electronic expansion valve 144 helps to improve the energy efficiency and comfort of the air conditioner 1.

The display panel control unit 151 is responsible for controlling and managing the operation of the display panel, receiving signals from the main controller 130 or other control units, and displaying corresponding information on the display panel, such as temperature setting, operation mode, timing setting, etc. In this way, the user can intuitively understand the operation state and the setting of the air conditioner 1.

The stepper motor control unit 152 is mainly used for controlling the operation of the stepper motor. Stepper motors are commonly used in air conditioners 1 to precisely adjust the position of dampers, air deflectors, etc. to achieve directional air supply or to optimize air flow. The stepper motor control unit 152 ensures that it can be rotated precisely by a predetermined number of steps and speed to meet the regulation requirements of the air conditioner 1 for wind direction and speed.

The dc fan control unit 153 is mainly responsible for controlling the operation of the dc fan. The direct current fan is an important component in the air conditioner 1 for generating an air flow to achieve a cooling or heating effect. The direct current fan control unit 153 adjusts the rotation speed and power of the fan according to the operation state of the air conditioner 1 and the user's demand, thereby optimizing the air circulation and temperature adjustment effect.

The panel control unit 154 is a panel input device, such as a key, a touch screen, etc., for managing the air conditioner 1, receives an operation instruction of a user, and transmits the operation instruction to the main controller 130 or other control units to realize various operation demands of the user on the air conditioner 1.

Other functional loads may include other components or devices in the air conditioner 1 that require a power supply to perform a particular function. The specific functional load depends on the design and functional requirements of the air conditioner 1 and may include sensors, lighting equipment, dehumidification devices, etc.

It should be noted that, when the external power source of the indoor unit 10 can normally supply power, the indoor unit switching power supply 120 plays a core role to provide the required working power to the first power unit group 140, the second power unit group 150, the main controller 130 and the power control switch 170, respectively. This means that all critical components can be stably supplied with power under normal operation conditions, thereby ensuring normal operation of the air conditioner 1.

However, when the indoor unit 10 is abnormally powered off, the indoor unit communication circuit 141 obtains the operating power from the outdoor unit control board 200 and supplies the operating power to the dc converter 142. The dc converter 142, upon receiving power, converts it to a voltage level suitable for each component, and supplies power to the nonvolatile memory 143, the electronic expansion valve 144, the main controller 130, and the power control switch 170, respectively. Thereby ensuring that the critical components can continue to operate even in the event of abnormal power failure of the indoor unit 10 to maintain the basic functions and safety of the air conditioner 1.

The power control switch 170 may be a triode, a MOS transistor, a relay, a photo-isolator, or the like. The choice of power control switch 170 depends on the specific application requirements and system requirements. In practical applications, the most suitable type of power control switch 170 may be selected according to comprehensive consideration of factors such as performance, cost, reliability, etc. of the system. Meanwhile, attention is paid to parameters such as a driving mode, power consumption, response speed and the like of the power control switch 170 so as to ensure that the power control switch can meet the overall requirements of the system.

In one specific example, the outdoor unit control board 200 includes an outdoor unit power supply circuit 210, an outdoor unit switching power supply 220, an outdoor unit communication circuit 230, and other functional loads, wherein,

The outdoor unit power supply circuit 210 has an input terminal connected to an external power supply of the outdoor unit 20, and an output terminal connected to an input terminal of the outdoor unit switching power supply 220, and is configured to convert commercial power input from the external power supply into direct current.

The output terminal of the outdoor switching power supply 220 is connected to the indoor unit communication circuit 141 and other functional loads, and is configured to convert the input dc power into a multi-path voltage.

Because the power supply circuits of the internal and external units and the switching power supply function approximately the same, the description is omitted here.

The utility model also provides the air conditioner 1, which comprises the power supply assembly of the air conditioner 1.

Fig. 3 is a schematic structural view of an air conditioner 1 according to an embodiment of the present utility model, and as shown in fig. 3, specifically, an outdoor unit 20 and at least one indoor unit 10, the outdoor unit 20 is provided with an outdoor unit control board 200 as described above, each indoor unit 10 is provided with an indoor unit control board 100 as described above, and an indoor unit communication circuit 141 in the outdoor unit control board 200 is communicatively connected with a communication circuit in each indoor unit control board 100 by way of a power line 300 carrier wave.

In the prior art, when a plurality of indoor units 10 are suddenly powered down, the electronic expansion valve 144 of the indoor unit 10 cannot be completely closed. This may result in a series of chain reactions, such as incapacity of evaporating the refrigerant, accumulation of the liquid refrigerant, entry of the liquid refrigerant into the compressor, etc., and may eventually cause serious problems such as damage to the compressor and water leakage of the indoor unit 10. In addition, when the system needs oil return or defrosting, if the electronic expansion valve 144 of the indoor unit 10 that is powered down is in a closed state, and the number of the indoor units 10 that are powered down is large, the oil return and defrosting effects will be directly affected, so that the reliability and safety of the whole system are affected.

However, with the power supply assembly of the air conditioner 1 of the present application, it is possible to ensure stable operation power supply of key components such as the electronic expansion valve 144 in the case where the indoor unit 10 is abnormally powered off. Specifically, when the external power supply of the indoor unit 10 is abnormal, the indoor unit communication circuit 141 obtains the operating power supply from the outdoor unit control board 200, and supplies power to the electronic expansion valve 144 and other components through the dc converter 142. Thus, even if the indoor unit 10 is powered down, the electronic expansion valve 144 can work normally, and the problem that it cannot be completely shut down is avoided.

In addition, the power supply assembly can optimize the oil return and defrosting process. When oil return or defrosting is required, the key components of the indoor unit 10 can still be supplied with power, so that the electronic expansion valve 144 can be ensured to be normally opened and closed, and smooth oil return and defrosting can be ensured. This not only improves the reliability of the system, but also extends the life of the critical components such as the compressor.

From the energy consumption perspective, the indoor unit 10 only operates necessary functional loads, such as the electronic expansion valve 144 and the indoor unit communication circuit 141, when power is abnormally cut off, which means that most of non-critical components are in a closed state, thereby greatly reducing energy consumption. The energy-saving design is beneficial to reducing energy waste and realizing more economic and efficient air conditioner use.

Second, from the power line 300 load perspective, the reduction in the functional load of the indoor unit 10 also reduces the current pressure on the power line 300. This optimization is particularly important in the case of one outdoor unit 20 with a plurality of indoor units 10. By avoiding the outdoor switching power supply 220 from being in a heavy duty operation state, stable power supply of the power line 300 can be ensured, and the possibility of current fluctuation and voltage instability can be reduced. This helps to ensure stable operation of the air conditioning system and also to extend the service lives of the power line 300 and the outdoor switching power supply 220.

In addition, a stable voltage supply is critical to ensure the normal operation of the outdoor switching power supply 220. The outdoor switching power supply 220 is easily failed or has a reduced performance under the condition of unstable voltage, thereby affecting the normal operation of the entire air conditioning system. By optimizing the power supply assembly design, the voltage can be kept stable when the indoor unit 10 is abnormally powered off, thereby ensuring the reliability and stability of the outdoor unit switching power supply 220.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been shown and described herein in detail, many other variations or modifications of the utility model consistent with the principles of the utility model may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the utility model. Accordingly, the scope of the present utility model should be understood and deemed to cover all such other variations or modifications.

Claims (12)

1. An air conditioner power supply assembly, comprising:

An indoor unit control board comprising a first electric component group, wherein the first electric component group comprises an indoor unit communication circuit, and

The outdoor unit control board comprises an outdoor unit communication circuit, the outdoor unit communication circuit is in communication connection with the indoor unit communication circuit through a power line carrier mode, and the first electric component group acquires a working power supply from the outdoor unit control board through the power line under the condition of abnormal power failure.

2. The air conditioner power supply assembly of claim 1 wherein,

The indoor unit control panel also comprises a second electricity utilization component group and a power supply control switch, wherein the first electricity utilization component group and the power supply control switch are respectively connected with an external power supply of the indoor unit, the second electricity utilization component group is connected with the power supply control switch, and the power supply control switch is used for controlling the power supply on-off of the second electricity utilization component group in a controlled manner.

3. The air conditioner power supply assembly of claim 2 wherein,

The indoor unit control panel also comprises a mains supply detection circuit and a main controller, wherein the main controller is respectively connected with the mains supply detection circuit and the power control switch, and when the mains supply detection circuit detects that the external power supply is abnormal, the first electric component group provides working power for the main controller and the power control switch, and the main controller controls the power control switch to be disconnected.

4. The air conditioner power supply assembly of claim 3 wherein,

The commercial power detection circuit comprises a first isolation device, wherein the first isolation device is respectively connected with an external power supply of the indoor unit and the main controller, and is connected under the condition that the commercial power input of the external power supply is normal, and disconnected under the condition that the commercial power input is abnormal.

5. The air conditioner power supply assembly of claim 3 wherein,

The indoor unit control panel also comprises an indoor unit power supply circuit and an indoor unit switch power supply, wherein the input end of the indoor unit power supply circuit is connected with an external power supply of the indoor unit, the output end of the indoor unit power supply circuit is connected with the input end of the indoor unit switch power supply, and the indoor unit control panel is configured to convert commercial power input by the external power supply into direct current;

And the output end of the indoor unit switching power supply is respectively connected with the first electric component group and the power supply control switch and is configured to convert the input direct current into multiple paths of voltages.

6. The air conditioner power supply assembly of claim 5 wherein,

The commercial power detection circuit comprises a second isolation device, the second isolation device is respectively connected with the indoor unit switching power supply and the main controller, and is connected under the condition that the weak current output of the indoor unit switching power supply is normal, and disconnected under the condition that the weak current output is abnormal.

7. The air conditioner power supply assembly of claim 3 wherein,

The commercial power detection circuit is a voltage detection circuit or a current detection circuit.

8. The air conditioner power supply assembly of claim 3 wherein,

The first electric component group further comprises a direct current converter, and the indoor unit communication circuit respectively provides working power supply for the main controller and the power supply control switch through the direct current converter under the condition that the commercial power detection circuit detects that the external power supply is abnormal.

9. The air conditioner power supply assembly of claim 2 wherein,

The second electricity-using component group includes, but is not limited to, a display panel control unit, a panel control unit, and a fan control unit.

10. The air conditioner power supply assembly of claim 2 wherein,

The power control switch is a triode, a MOS tube, a relay or a photoelectric isolator.

11. The air conditioner power supply assembly of claim 1 wherein,

The outdoor unit control board also comprises an outdoor unit power supply circuit and an outdoor unit switch power supply, wherein the input end of the outdoor unit power supply circuit is connected with an external power supply of the outdoor unit, the output end of the outdoor unit power supply circuit is connected with the input end of the outdoor unit switch power supply, and the outdoor unit control board is configured to convert commercial power input by the external power supply into direct current;

The output end of the outdoor unit switching power supply is connected with the indoor unit communication circuit and is configured to convert the input direct current into multiple paths of voltages.

12. An air conditioner comprising the air conditioner power supply assembly according to any one of claims 1-11.