Air conditioner

Abstract

The invention discloses an air conditioner which comprises an indoor unit and an outdoor unit. The outdoor unit comprises a frequency converter circuit, the frequency converter circuit comprises a rectifying circuit, a PFC circuit and a driving unit, and an alternating current power supply supplies power to an outdoor master control side through a switching power supply; the first relay is used for connecting / disconnecting a power supply line of a strong current component connected with the strong current port; the second relay is used for supplying power to the outdoor driving side, and the second relay is connected with the outdoor main control side; a third relay connected in parallel with the second relay and the capacitor connected in series and connected to an outdoor driving side; the processing unit configures the outdoor unit to be in a first standby mode, in the first standby mode, the first relay, the second relay and the third relay are all powered off, and when the indoor unit operates to wake up the outdoor unit in the first standby mode, the first relay and the second relay are both powered on, and the third relay is powered on after a period of time delay. The standby control of the outdoor unit is realized by controlling the on-off of the relay.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0002] Air conditioners are one of the most commonly used household appliances in modern life, and are widely used in homes, shopping malls or office areas. Especially for shopping malls and office areas, variable frequency air conditioners are the most commonly used. The variable frequency air conditioner controller is divided into an indoor unit circuit and an outdoor unit circuit, and both the indoor unit circuit and the outdoor unit circuit have a power supply.

[0003] At present, some technical solutions use energy storage modules to power the outdoor unit in standby mode. One is to place the energy storage module on the outdoor substrate side. When the outdoor unit enters standby mode, the energy storage module directly powers the main control unit of the outdoor unit to ensure that it can be reawakened; the other is to place the energy storage module on the indoor substrate side, and the indoor unit is powered and awakened. However, the use of energy storage modules will undoubtedly increase the cost of the substrate and the whole machine, which is not conducive to the miniaturization and integration of the substrate. Summary of the invention

[0004] In response to the problems pointed out in the background technology, some embodiments of the present application provide an air conditioner, which directly draws power from an AC power supply and supplies power to an outdoor main control unit through a switching power supply, and controls the power supply of the high-power port and the outdoor driving main control unit through the on-off control of a relay, thereby achieving low-power standby of the outdoor unit and being able to be awakened by the indoor unit, avoiding the addition of an additional energy storage module and without changing the hardware circuit and software of the indoor unit.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: Some embodiments of the present application relate to an air conditioner, comprising: An indoor unit, which is used to condition the indoor air; An outdoor unit, which is connected to the indoor unit and comprises: An outdoor drive side, which includes a frequency converter circuit, wherein the frequency converter circuit includes a rectifier circuit, a PFC circuit and a drive unit connected in sequence, and is used to receive an AC power supply and drive a load of the frequency converter circuit, wherein the AC power supply supplies power to the outdoor main control side through a switching power supply; A first relay, which is connected to the outdoor main control side and is used to connect / disconnect the power supply line of the high-power component connected to the high-power port; A second relay, which is connected in series with a capacitor on a power supply line between the AC power supply and an input end of the rectifier circuit, and is used to supply power to the outdoor drive side, and the second relay is connected to the outdoor master control side; a third relay connected in parallel with the second relay and the capacitor connected in series, and connected to the outdoor drive side; A processing unit configures the outdoor unit to be in a first standby mode. In the first standby mode, the first relay, the second relay and the third relay are all powered off. When the indoor unit operates to wake up the outdoor unit in the first standby mode, the first relay and the second relay are powered on at the same time and the third relay is powered on after a delay period.

[0006] This technical solution has the following beneficial effects or advantages: The outdoor main control side is directly powered by the AC power supply, and there is no need to set up a separate energy storage module. By setting a first relay between the high-voltage port and the AC power supply and setting a second relay and a third relay in parallel at the front end of the rectifier, the on-off state of each component of the outdoor main control drive integrated substrate can be controlled by controlling the on-off state of the first relay, the second relay and the third relay, thereby realizing low-power standby of the outdoor unit and wake-up of the outdoor unit. This control process is embedded in the outdoor unit program, and does not require the addition of energy storage modules and other wiring, nor does it require changes to the hardware circuit and software of the indoor unit, and is easy to implement.

[0007] In some embodiments of the present application, the air conditioner further comprises: An Internet of Things smart module, whose power supply end is connected to the strong power port, and the processing unit is configured to select the Internet of Things smart module, and the selection of the Internet of Things smart module includes the outdoor unit and the indoor unit are actually connected to the Internet of Things smart module, and the outdoor unit and the indoor unit are not actually connected to the Internet of Things smart module; When the outdoor unit and the indoor unit are not actually connected to the IoT smart module, the outdoor unit is configured to be in a first standby mode. When the outdoor unit and the indoor unit are actually connected to the IoT smart module, the outdoor unit is configured to be in a second standby mode; In the second standby mode, the first relay is powered on, and the second and third relays are powered off. When the indoor unit operates to wake up the outdoor unit in the second standby mode, the first relay and the second relay are powered on at the same time and the third relay is powered on after a delay.

[0008] This technical solution has the following beneficial effects or advantages: By selecting the IoT smart module, different standby modes of the outdoor unit can be realized, which can not only meet the low standby power consumption of the outdoor unit, but also flexibly meet the different scenario requirements of users.

[0009] In some embodiments of the present application, in a scenario where the outdoor unit and the indoor unit are not actually connected to the IoT smart module, when the outdoor unit is powered on and there is no compressor operation signal, the first relay and the second relay are powered on, and the third relay is powered off; When there is a compressor operation signal, the first relay, the second relay and the third relay are all powered on; When the indoor unit is turned off, the first relay and the second relay remain powered on, and the third relay is powered off; When the condition for entering the first standby mode is met, the first relay, the second relay and the third relay are all de-energized.

[0010] This technical solution has the following beneficial effects or advantages: In the scenario where the user does not set up the IoT smart module, when the outdoor unit is powered on and there is no demand for compressor operation, there is a demand for compressor operation, the indoor unit is turned off, and there is a standby demand, the on-off control of the first relay, the second relay and the third relay is used to ensure the normal operation of the air conditioner and the low-power standby when not working.

[0011] In some embodiments of the present application, the condition for entering the first standby mode is that the air conditioner is shut down for more than a period of time and there is no need to preheat the compressor.

[0012] This technical solution has the following beneficial effects or advantages: When the air conditioner meets the conditions for entering the first standby mode, 1W low power consumption standby can be achieved.

[0013] In some embodiments of the present application, in a scenario where the outdoor unit and the indoor unit are actually connected to the IoT smart module, when the outdoor unit is powered on and there is no compressor operation signal, the first relay and the second relay are powered on, and the third relay is powered off; When there is a compressor operation signal, the first relay, the second relay and the third relay are all powered on; When the indoor unit is turned off, the first relay and the second relay remain powered on, and the third relay is powered off; When the condition for entering the second standby mode is met, the first relay remains powered on, and the second relay and the third relay are both powered off.

[0014] This technical solution has the following beneficial effects or advantages: When the user sets the IoT smart module and meets the requirements of the outdoor unit being powered on without the compressor running, with the compressor running, the indoor unit being turned off, and being in standby mode, the on-off control of the first relay, the second relay, and the third relay is used to consider whether the IoT smart module can work in the standby state of the outdoor unit, thereby ensuring the low power standby mode of the air conditioner when not working and the reliable operation of the IoT smart module.

[0015] In some embodiments of the present application, the outdoor unit further includes: A filter circuit is used to receive the AC power supply and has output ends respectively connected to a power supply line where the first relay is located, a power supply line where the third relay is located, and a power supply line where the second relay is located.

[0016] This technical solution has the following beneficial effects or advantages: By setting up a filter circuit, the noise on the AC power supply can be filtered out to ensure power supply reliability.

[0017] In some embodiments of the present application, the processing unit is further configured to: When the outdoor unit is powered on for the first time, when the outdoor unit does not receive the handshake message of the IoT smart module, the initial standby mode selects the first standby mode; when the outdoor unit receives the handshake message and the two do not establish normal communication subsequently, the initial standby mode selects the first standby mode; when the outdoor unit receives the handshake message and the two establish normal communication subsequently, the initial standby mode selects the second standby mode; When the outdoor unit remains powered on, whether to switch to the standby mode is selected according to whether a breathing message from the IoT smart module is received.

[0018] This technical solution has the following beneficial effects or advantages: When the outdoor unit is powered on for the first time, the initial standby mode is selected by judging whether the IoT smart module is actually connected, ensuring that different initial standby modes can be selected in different scenarios of whether the IoT smart module is actually connected to meet different low power consumption conditions when the outdoor unit is in standby mode.

[0019] In some embodiments of the present application, when the standby mode is the first standby mode, when the outdoor unit does not receive the breathing telegram, the standby mode still selects the first standby mode, and when the outdoor unit continues to receive the breathing telegram, the standby mode switches to the second standby mode; When the standby mode is the second standby mode, when the outdoor unit does not receive the breathing telegram, the standby mode switches to the first standby mode, and when the outdoor unit continues to receive the breathing telegram, the standby mode still selects the second standby mode.

[0020] This technical solution has the following beneficial effects or advantages: When the outdoor unit is powered on, the standby mode is switched by judging in real time whether the IoT smart module is actually connected, ensuring that different standby modes can be switched in different scenarios of whether the IoT smart module is actually connected, so as to meet different low-power standby conditions during the power-on process of the outdoor unit.

[0021] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is the principle block diagram of the air conditioner; Figure 2 The circuit structure of the inverter circuit in the outdoor drive side; Figure 3 A power supply and communication schematic diagram of the outdoor unit in the air conditioner embodiment proposed in this application; Figure 4 The structure for controlling the first relay in the air conditioner embodiment proposed in this application Figure 1 ; Figure 5 The structure for controlling the first relay in the air conditioner embodiment proposed in this application Figure 2 ; Figure 6 for Figure 3 The on-off timing diagram of the first relay, the second relay and the third relay in the outdoor unit of the air conditioner embodiment shown; Figure 7 This is a power supply and communication schematic diagram of the outdoor unit and the IoT smart module in the air conditioner embodiment proposed in this application; Figure 8 for Figure 7 The on-off timing diagram of the first relay, the second relay and the third relay in the outdoor unit of the air conditioner embodiment shown; Fig. 9 A flow chart of the initial standby mode selection when the outdoor unit is initially powered on in the air conditioner embodiment proposed in this application; Fig.10 A flow chart of switching to standby mode when the outdoor unit remains powered on in the air conditioner embodiment proposed in this application; Reference numerals: 100, outdoor unit; 110, outdoor drive side; 111, rectifier circuit; 112, PFC circuit; 113, IPM; 120, outdoor main control side; 121, outdoor main control unit; 130, AC power supply; 130A, filter circuit; 140, first relay; 150, second relay; 150A, capacitor; 160, third relay; 170, switching power supply; 200. Indoor unit; 300. IoT smart module. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0030] See also Figure 1 , the air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, condenser, expansion valve and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0031] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0032] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0033] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0034] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0035] The outdoor unit of the air conditioner is also commonly referred to as the outdoor unit, and the indoor unit of the air conditioner is also commonly referred to as the indoor unit.

[0036] The outdoor unit 100 includes an outdoor drive side 110 and an outdoor main control side 120 , wherein the outdoor drive side 110 includes an outdoor drive main control unit and an inverter circuit.

[0037] See also Figure 2, which shows the circuit structure of the inverter circuit, the inverter circuit includes a rectifier circuit 111, a PFC circuit 112 and a drive unit.

[0038] The drive unit is used to drive the load of the inverter circuit and includes an IPM113 (Intelligent Power Module) and a driver (not shown) for driving each switch tube in the IPM113. The IPM113 is used to receive the bus voltage output by the PFC circuit 112 to drive the load (for example, a compressor, an outdoor fan).

[0039] An input end of the rectifier circuit 111 is connected to a (single-phase or three-phase) AC power source 130 , and the rectifier circuit 111 is used to rectify the AC power provided by the AC power source 130 to obtain a rectified pulsating wave.

[0040] The rectifier circuit 111 is a single-phase bridge rectifier composed of four diodes, or a three-phase bridge rectifier composed of six diodes.

[0041] Continue to see Figure 2 The PFC circuit 112 is connected between the output end of the rectifier circuit 111 and the electrolytic capacitor E1 / E2, and the PFC circuit 112 is used to perform power factor correction on the power supply.

[0042] In some embodiments of the present application, see Figure 3 , where a solid line with an arrow represents power supply and a dotted line with an arrow represents communication.

[0043] The AC power supply 130 directly supplies power to the outdoor main control side 120 (including the outdoor unit main control circuit and the outdoor main control unit) through the switching power supply 170 , that is, the outdoor unit 100 is powered on as long as it is connected to the AC power supply 130 .

[0044] In some embodiments of the present application, the outdoor unit 100 further includes a first relay RY1 140 , a second relay RY2 150 , and a third relay RY3 160 .

[0045] In some embodiments of the present application, the first relay RY1 140 is used to connect / disconnect the power supply line of the high-voltage component (eg, a four-way valve, a high-voltage and low-voltage switch) connected to the high-voltage port.

[0046] The second relay RY2 150 and the capacitor 150A are connected in series on the power supply line between the AC power supply 130 and the input end of the rectifier circuit 111 for supplying power to the outdoor drive side 110, and the third relay RY3 160 is connected in parallel with the second relay RY2 150 and the capacitor 150A connected in series.

[0047] In some embodiments of the present application, both the first relay RY1 140 and the second relay RY2 150 are directly controlled by the outdoor master control side 120 .

[0048] The third relay RY3 160 is directly controlled by the outdoor driving side 110 , and because the outdoor master control side 120 and the outdoor driving side 110 communicate with each other, the third relay RY3 160 is indirectly controlled by the outdoor master control side 120 .

[0049] In some embodiments of the present application, the first relay RY1 140, the second relay RY2 150 and the third relay RY3 160 are all switched on and off by pin levels.

[0050] For example, the coils of the first relay RY1 140 and the second relay RY2 150 are both directly controlled by the outdoor main control unit 121 to control power on / off, and the normally open switch of the first relay RY1 140 is connected to the power supply line of the high-power component connected to the high-power port, the normally open switch of the second relay RY2 150 is connected to the power supply line between the AC power supply 130 and the input end of the rectifier circuit 111, and the normally open switch of the third relay RY3 160 is connected to the power supply line between the AC power supply 130 and the input end of the rectifier circuit 111.

[0051] When the outdoor main control unit 121 sends a control signal to energize the coil of the first relay RY1 140, the normally open switch of the first relay RY1 140 is closed, so that the power supply line of the AC power supply 130 and the high-current component connected to the high-current port is connected, so that the AC power supply 130 can supply power to the high-current component connected to the high-current port.

[0052] See also Figure 4 and Figure 5 , which is explained by taking the outdoor main control unit 121 controlling the on and off of the first relay RY1 140 as an example.

[0053] See also Figure 4 A control port of the outdoor main control unit 121 controls the on and off of the first relay RY1 140 through the high-level switch control element NMOS tube Q1.

[0054] The gate of the NMOS tube Q1 is connected to a control port of the outdoor main control unit 121 through a current limiting resistor R2', the source is grounded, the drain is connected to one end of the coil of the first relay RY1 140, and the other end of the coil is connected to the power supply Vcc through a current limiting resistor R6.

[0055] A high level signal is outputted at a control port of the outdoor main control unit 121, and the NMOS tube Q1 is turned on. At this time, the power supply Vcc supplies power to the coil, and its normally open switch is closed.

[0056] A control port of the outdoor main control unit 121 outputs a low-level signal, and the NMOS tube Q1 is turned off. At this time, the power supply Vcc does not supply power to the coil, and its normally open switch is disconnected.

[0057] See also Figure 5 A control port of the outdoor main control unit 121 controls the on and off of the first relay RY1 140 through the low-level switch control element PMOS tube Q2.

[0058] The gate of the PMOS tube Q2 is connected to a control port of the outdoor main control unit 121 through a current limiting resistor R5', the source is connected to the power supply Vcc, the drain is connected to one end of the coil, and the other end of the coil is grounded through a current limiting resistor R7.

[0059] A low level signal is outputted at a control port of the outdoor main control unit 121, and the PMOS tube Q2 is turned on. At this time, the power supply Vcc supplies power to the coil, and its normally open switch is closed.

[0060] A high level signal is outputted at a control port of the outdoor main control unit 121, and the PMOS tube Q2 is disconnected. At this time, the power supply Vcc does not supply power to the coil, and its normally open switch is disconnected.

[0061] In some embodiments of the present application, when the outdoor unit 100 is powered on and there is no demand for compressor operation, the outdoor main control unit 121 sends a control signal to energize the coil of the second relay RY2 150, and the normally open switch of the second relay RY2 150 is closed, so that the AC power supply 130 is connected to the rectifier circuit 111 through the normally open switch of the second relay RY2 150, so that the AC power supply 130 supplies power to the outdoor drive side 110.

[0062] When the indoor unit 200 has an operation demand, the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor main control side 120 informs the outdoor drive side 110 that there is currently a compressor operation demand. At this time, the driving main control unit sends a control signal to make the coil of the third relay RY3 160, and the normally open switch of the third relay RY3 160 is closed, short-circuiting the normally open switch of the second relay RY2 150. At this time, the AC power supply 130 is connected to the rectifier circuit 111 through the normally open switch of the third relay RY3 160, so that the AC power supply 130 supplies power to the outdoor drive side 110.

[0063] As described above, when the third relay RY3 160 is energized, the second relay RY2 150 may be de-energized. However, considering that the second relay RY2 150 needs to be energized after the compressor stops from running, frequent switching of the second relay RY2 150 is avoided. The second relay RY2 150 may be energized while the third relay RY3 160 is energized.

[0064] In some embodiments of the present application, in order to facilitate the standby of the outdoor unit 100 and reduce the standby power consumption, the outdoor unit 100 is placed in the first standby mode by controlling the on and off states of the first relay RY1 140, the second relay RY2 150 and the third relay RY3 160.

[0065] See also Figure 6 , the compressor must be in a stopped state before entering the first standby mode, and the third relay RY3160 is de-energized at this time.

[0066] Since the outdoor drive side 110 has no power supply demand (the compressor has no operation demand and the drive main control unit has no communication demand), the outdoor unit 100 can enter a power-off sleep state, and therefore, the second relay RY2 150 is switched from on to off.

[0067] Since the air conditioner unit is in the shutdown state, the indoor unit 200 has no frequency demand, the compressor and fan are all stopped, and the four-way valve, high and low voltage switches and other high-voltage components have no high-voltage power supply demand and can also enter a long-term power-off state. Therefore, the first relay RY1 140 is also switched from on to off.

[0068] Therefore, when entering the first standby mode, refer to Figure 6 , the first relay RY1 140, the second relay RY2 150 and the third relay RY3 160 are all powered off, and the outdoor drive side 110 (rectifier circuit 111, PFC circuit 112, IPM 113, etc.), four-way valve and other strong current components are all in a power-off state.

[0069] In some embodiments of the present application, for example, devices such as the outdoor electronic expansion valve EVO, an integrated temperature sensor (for example, for detecting outdoor temperature, evaporation temperature, exhaust temperature, compressor suction port temperature, etc.) are powered by the AC power supply 130 through the switching power supply 170, so these devices can work normally.

[0070] Furthermore, since the outdoor drive side 110 loses power, the communication between the outdoor drive side 110 and the outdoor main control side 120 is disconnected, while the communication between the indoor unit 200 and the outdoor unit 100 is still working normally, so that the outdoor unit 100 can be woken up by turning on the indoor unit 200 later.

[0071] In some embodiments of the present application, before the outdoor unit 100 enters the first standby mode, when the outdoor unit 100 is not powered on, the first relay RY1 140, the second relay RY2 150 and the third relay RY3 160 are all de-energized.

[0072] See also Figure 6When the outdoor unit 100 is powered on, the first relay RY1 140 is powered on, the second relay RY2 150 is powered on, the four-way valve, high and low voltage switches and other strong electrical components can work normally, and the outdoor drive side 110 can work normally.

[0073] After the outdoor unit 100 is powered on, if there is no demand for the compressor to operate (that is, the indoor unit 200 is not operating), the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor drive side 110 receives the communication command from the outdoor main control side 120, controls the third relay RY3 160 to cut off power, and the compressor remains not operating.

[0074] If there is a demand for compressor operation (ie, the indoor unit 200 operates), the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication command from the outdoor main control side 120, controls the third relay RY3 160 to be powered on, and the compressor starts to operate.

[0075] When the indoor unit 200 needs to stop after running, the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication command from the outdoor main control side 120, controls the third relay RY3 160 to cut off the power, and the compressor stops running.

[0076] Afterwards, when the condition for entering the first standby mode is met, the first standby mode is entered.

[0077] In some embodiments of the present application, the conditions for entering the first standby mode can be set by the user, for example, the air conditioner is stopped for more than a period of time and no compressor preheating is required, or the air conditioner is stopped for more than a period of time and the outdoor ambient temperature is within a preset temperature range.

[0078] When the outdoor unit 100 is turned on again, the wake-up condition of the first standby mode is met, the first relay RY1 140 and the second relay RY2 150 are powered on, the four-way valve, high and low voltage switches and other strong electrical components can work normally, and the outdoor drive side 110 can work normally.

[0079] Since the compressor has a demand for operation, the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication instruction from the outdoor main control side 120, controls the third relay RY3 160 to be powered on, and the compressor starts to operate.

[0080] In some embodiments of the present application, after the second relay RY2 150 is powered on for a period of time (eg, 10 seconds), the third relay RY3 160 is controlled to be powered on.

[0081] Since the second relay RY2 150 is connected in series with the capacitor 150A, and both are connected in parallel with the third relay RY3 160, the second relay RY2 150 is powered on first, and the large current generated at the beginning of the compressor operation can flow to the capacitor 150A through the second relay RY2 150, playing the role of buffering the large current and preventing the large current from directly impacting the rear-end devices and damaging the devices.

[0082] In some embodiments of the present application, see Figure 7 In order to realize the Internet of Things function of the air conditioner, an Internet of Things smart module 300 is generally set up to connect other home appliances, and it is necessary to consider whether the outdoor unit 100 can work normally when it is in standby mode.

[0083] The IoT smart module 300 can be optional, for example, it can be switched by the user to be connected to an air conditioner.

[0084] The optional connected IoT smart module 300 includes a actually connected IoT smart module 300 and an unconnected IoT smart module 300.

[0085] Wherein, the case where the IoT smart module 300 is not actually connected is as shown in Figure 3 The situation shown is consistent and will not be repeated here.

[0086] As follows, see Figure 7 , describing the situation of actually connecting the IoT smart module 300, wherein, Figure 7 A solid line with an arrow in it represents power supply and a dotted line with an arrow in it represents communication.

[0087] The IoT smart module 300 is a high-voltage component, which is connected to the high-voltage port of the outdoor substrate. If the IoT smart module 300 is to work in standby mode, power supply and communication of the IoT smart module 300 are involved.

[0088] In some embodiments of the present application, the IoT smart module 300 needs to be powered, and cannot be powered as in the first standby mode. Figure 7 , the first relay RY1 140 is powered off, and the first relay RY1 140 should be powered on in the standby mode, so that the AC power supply 130 supplies power to the IoT smart module 300 through the high-power port.

[0089] The communication line of the Internet of Things smart module 300 is directly plugged into the communication port of the outdoor substrate, and is connected to the communication bus with the help of the outdoor substrate. Since the outdoor main control side 120 remains powered on in standby mode, when connecting the Internet of Things smart module 300, there is no need to perform special processing on the control logic. The Internet of Things smart module 300 can communicate normally with the indoor unit 200 and the outdoor unit 100 respectively.

[0090] As described above, when the IoT smart module 300 is connected, the outdoor unit 100 is configured to be in the second standby mode.

[0091] In some embodiments of the present application, when the outdoor unit 100 is not powered on, the first relay RY1 140, the second relay RY2 150 and the third relay RY3 160 are all de-energized.

[0092] See also Figure 8 , when the outdoor unit 100 is powered on, the first relay RY1 140 is powered on, the second relay RY2 150 is powered on, the strong electrical components such as the four-way valve, the high and low voltage switches, the IoT smart module 300 can work normally, and the outdoor drive side 110 can work normally.

[0093] After the outdoor unit 100 is powered on, if there is no demand for the compressor to operate (that is, the indoor unit 200 is not operating), the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor drive side 110 receives the communication command from the outdoor main control side 120, controls the third relay RY3 160 to cut off power, and the compressor remains not operating.

[0094] If there is a demand for compressor operation (ie, the indoor unit 200 operates), the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication command from the outdoor main control side 120, controls the third relay RY3 160 to be powered on, and the compressor starts to operate.

[0095] When the indoor unit 200 needs to stop after running, the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication command from the outdoor main control side 120, and then controls the third relay RY3 160 to cut off the power, and the compressor stops running.

[0096] Afterwards, when the conditions for entering the second standby mode are met, the second standby mode is entered, at which time the first relay RY1 140 is powered on (i.e., the high-voltage port remains powered on to ensure that the IoT smart module 300 can work normally), and the second relay RY2 150 and the third relay RY3 160 are both powered off.

[0097] In some embodiments of the present application, the condition for entering the second standby mode can be set by the user.

[0098] When the outdoor unit 100 is turned on again, the wake-up condition of the second standby mode is met, the second relay RY2150 is controlled to be powered on, and the outdoor drive side 110 can work normally.

[0099] Since the compressor has a demand for operation, the indoor unit 200 communicates with the outdoor main control side 120, and the outdoor driving side 110 receives the communication instruction from the outdoor main control side 120, controls the third relay RY3 160 to be powered on, and the compressor starts to operate.

[0100] In some embodiments of the present application, the third relay RY3 160 is controlled to be powered on after a delay of a period of time (for example, 10 seconds) after the second relay RY2 150 is powered on, so as to prevent the large current generated at the initial stage of the compressor from directly impacting the rear-end components and damaging the components.

[0101] See also Figure 7 ,compared to Figure 3 When the IoT smart module 300 is actually connected, as long as the outdoor main control side 120 is powered on, the IoT smart module 300 is powered on, that is, the first relay RY1 140 is powered on.

[0102] In some embodiments of the present application, since the second standby mode needs to power on the first relay RY1 140 compared to the first standby mode, the first standby mode consumes less power than the second standby mode.

[0103] In some embodiments of the present application, as described below, switching between the first standby mode and the second standby mode is implemented according to whether the IoT smart module 300 is actually connected.

[0104] See also Fig. 9 When the outdoor unit 100 is powered on for the first time, the initial standby mode is selected by judging whether the handshake message of the IoT smart module 300 is received and whether a normal communication state is established with the IoT smart module 300 .

[0105] When the handshake message is not received, it indicates that the IoT smart module 300 is not actually connected. At this time, the initial standby mode is selected as the first standby mode.

[0106] When the handshake message is received but the normal communication state is not established subsequently, it means that the IoT smart module 300 is actually connected but the IoT smart module 300 is in a faulty or offline state. At this time, the initial standby mode is selected as the first standby mode.

[0107] When the handshake message is received and a normal communication state is subsequently established, it indicates that the IoT smart module 300 is actually connected and the communication is normal. At this time, the initial standby mode selects the second standby mode.

[0108] See also Fig.10 When the outdoor unit 100 remains powered on, it determines whether to receive the breathing message from the IoT smart module 300 and chooses whether to switch to the standby mode.

[0109] When the initial standby mode is the first standby mode, when the breathing message of the Internet of Things smart module 300 is not received, it means that the Internet of Things smart module 300 is not actually connected, or even if the Internet of Things smart module 300 is actually connected, the Internet of Things smart module 300 is in a faulty or offline state. Therefore, it is selected to maintain the first standby mode.

[0110] When the initial standby mode is the first standby mode, when the breathing telegrams of the Internet of Things smart module 300 are continuously received, it means that the Internet of Things smart module 300 is actually connected and the communication is normal. At this time, the standby mode is switched to the second standby mode.

[0111] When the initial standby mode is the second standby mode, when the breathing message of the IoT smart module 300 is not received, it means that the IoT smart module 300 is actually connected but the IoT smart module 300 is in a faulty or offline state, so it is selected to switch to the first standby mode.

[0112] When the initial standby mode is the second standby mode, when the breathing telegrams of the IoT smart module 300 are continuously received, it indicates that the IoT smart module 300 is actually connected and the communication is normal. At this time, the standby mode remains in the second standby mode.

[0113] In this way, the switching of the standby mode can be controlled by whether or not a telegram is sent and received, thereby realizing the on-off switching of the first relay RY1140, the second relay RY2 150 and the third relay RY3 160, without adding or changing the hardware circuit, and is compatible with different online solutions without being affected by the actual installation environment.

[0114] And according to the optional IoT smart module 300, real-time switching and flexible adaptation of the standby mode can be achieved to meet the needs of various scenarios and reduce power consumption at the same time.

[0115] Since the outdoor unit 100 is respectively connected to the indoor unit 200 and the IoT smart module 300 for communication, it is convenient to wake up the outdoor unit 100 by turning on the indoor unit 200 without changing the hardware circuit and software of the indoor unit 200, thereby solving the problem of being unable to wake up the outdoor unit 100.

[0116] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0117] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner, characterized in that: include: An indoor unit, which is used to condition the indoor air; An outdoor unit, which is connected to the indoor unit and comprises: An outdoor drive side, which includes a frequency converter circuit, wherein the frequency converter circuit includes a rectifier circuit, a PFC circuit and a drive unit connected in sequence, and is used to receive an AC power supply and drive a load of the frequency converter circuit, wherein the AC power supply supplies power to the outdoor main control side through a switching power supply; A first relay, which is connected to the outdoor main control side and is used to connect / disconnect the power supply line of the high-power component connected to the high-power port; A second relay, which is connected in series with a capacitor on a power supply line between the AC power supply and an input end of the rectifier circuit, and is used to supply power to the outdoor drive side, and the second relay is connected to the outdoor main control side; a third relay connected in parallel with the second relay and the capacitor connected in series, and connected to the outdoor drive side; A processing unit configures the outdoor unit to be in a first standby mode. In the first standby mode, the first relay, the second relay and the third relay are all powered off. When the indoor unit operates to wake up the outdoor unit in the first standby mode, the first relay and the second relay are both powered on and the third relay is powered on after a delay period.

2. The air conditioner according to claim 1, characterized in that: The air conditioner also includes: An Internet of Things smart module, whose power supply end is connected to the strong power port, and the processing unit is configured to select the Internet of Things smart module, and the selection of the Internet of Things smart module includes the outdoor unit and the indoor unit are actually connected to the Internet of Things smart module, and the outdoor unit and the indoor unit are not actually connected to the Internet of Things smart module; When the outdoor unit and the indoor unit are not actually connected to the IoT smart module, the outdoor unit is configured to be in a first standby mode; When the outdoor unit and the indoor unit are actually connected to the IoT smart module and normal communication is established, the outdoor unit is configured to be in a second standby mode; In the second standby mode, the first relay is powered on, and the second and third relays are powered off. When the indoor unit operates to wake up the outdoor unit in the second standby mode, the first relay and the second relay are powered on at the same time and the third relay is powered on after a delay.

3. The air conditioner according to claim 2, characterized in that: In a scenario where the outdoor unit and the indoor unit are not actually connected to the IoT smart module, when the outdoor unit is powered on and there is no compressor operation signal, the first relay and the second relay are powered on, and the third relay is powered off; When there is a compressor operation signal, the first relay, the second relay and the third relay are all powered on; When the indoor unit is turned off, the first relay and the second relay remain powered on, and the third relay is powered off; When the condition for entering the first standby mode is met, the first relay, the second relay and the third relay are all de-energized.

4. The air conditioner according to claim 1 or 3, characterized in that: The condition for entering the first standby mode is that the air conditioner is stopped for more than a period of time and there is no need to preheat the compressor.

5. The air conditioner according to claim 2, characterized in that: The outdoor unit and the indoor unit are actually connected to the IoT smart module, and when the outdoor unit is powered on and there is no compressor operation signal, the first relay and the second relay are powered on, and the third relay is powered off; When there is a compressor operation signal, the first relay, the second relay and the third relay are all powered on; When the indoor unit is turned off, the first relay and the second relay remain powered on, and the third relay is powered off; When the condition for entering the second standby mode is met, the first relay remains powered on, and the second relay and the third relay are both powered off.

6. The air conditioner according to claim 1, characterized in that: The outdoor unit further comprises: A filter circuit is used to receive the AC power supply and has output ends respectively connected to a power supply line where the first relay is located, a power supply line where the third relay is located, and a power supply line where the second relay is located.

7. The air conditioner according to claim 2, characterized in that: The processing unit is further configured to: When the outdoor unit is powered on for the first time, when the outdoor unit does not receive the handshake message of the IoT smart module, the initial standby mode selects the first standby mode; when the outdoor unit receives the handshake message and the two do not establish normal communication subsequently, the initial standby mode selects the first standby mode; when the outdoor unit receives the handshake message and the two establish normal communication subsequently, the initial standby mode selects the second standby mode; When the outdoor unit remains powered on, whether to switch to the standby mode is selected according to whether a breathing message from the IoT smart module is received.

8. The air conditioner according to claim 7, characterized in that: When the standby mode is the first standby mode, when the outdoor unit does not receive the breathing telegram, the standby mode still selects the first standby mode, and when the outdoor unit continues to receive the breathing telegram, the standby mode switches to the second standby mode; When the standby mode is the second standby mode, when the outdoor unit does not receive the breathing telegram, the standby mode switches to the first standby mode, and when the outdoor unit continues to receive the breathing telegram, the standby mode still selects the second standby mode.

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