CN114826336A

CN114826336A - Air conditioner outdoor unit and air conditioner

Info

Publication number: CN114826336A
Application number: CN202210498110.XA
Authority: CN
Inventors: 高岭; 贾昌磊; 王瑞佳
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-07-29
Anticipated expiration: 2042-05-09
Also published as: CN114826336B

Abstract

The invention discloses an air conditioner outdoor unit and an air conditioner, wherein the air conditioner outdoor unit comprises: the near field communication module is communicated with a main control substrate of the air conditioner outdoor unit and is provided with a storage space; the first data space is a part of the storage space, a protocol packet header A and a protocol packet header B of a first data protocol are stored in the first data space, the protocol packet header A comprises a request data format code, an outdoor unit address, an indoor unit address, a read-write effective data size, a CRC value, a power-down identifier of a near field communication module and at least one transceiving end authorization code, and the protocol packet header B is positioned in a data interaction area of the first data space; when the near field communication module is powered on and communicates with the APP near field of the receiving and transmitting terminal, if the APP can be matched with one of the authorization codes of the receiving and transmitting terminal, the APP adopts a first data protocol to perform read-write operation on the near field communication module. The invention can realize data transmission between the APP and the air conditioner outdoor unit by utilizing the first data protocol.

Description

Air conditioner outdoor unit and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner outdoor unit and an air conditioner.

Background

The market demand of the central air conditioner, which is an important component of office and home, is continuously expanding, and the installation of the central air conditioner is always a problem which is concerned by users.

When the central air conditioner is installed and debugged, service personnel are required to trigger physical keys of an air conditioner circuit board, such as a dial switch and the like, which wastes time and labor for the installation and debugging of the air conditioner. Meanwhile, when the central air conditioner has problems and needs to be supported after sale, the central air conditioner is generally externally connected with special diagnostic equipment to check the real-time running condition of the air conditioner, which is also inconvenient for the after sale of the air conditioner.

Therefore, the mobile phone APP communicating with the outdoor unit is adopted, the outdoor unit can be maintained or data can be read and written conveniently, the cost performance and competitiveness of the product are improved, but the protocol for the communication between the mobile phone APP and the outdoor unit and how to read and write data are a great technical challenge for people in related fields.

Disclosure of Invention

In order to solve the above technical problem, an object of the present invention is to provide an outdoor unit of an air conditioner, which can implement read/write operations on a near field communication module by using an APP and a first data protocol, so as to facilitate data acquisition.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the application provides an air condensing units, its characterized in that includes:

the near field communication module is communicated with a main control substrate of the air conditioner outdoor unit and is provided with a storage space;

the first data space is a part of the storage space, a protocol packet header A and a protocol packet header B of a first data protocol are stored in the first data space, the protocol packet header A comprises a request data format code, an outdoor unit address, an indoor unit address, a read-write effective data size, a CRC value, a power-down identifier of a near field communication module and at least one transceiving end authorization code, and the protocol packet header B is positioned in a data interaction area of the first data space;

when the near-field communication module is powered on and communicates with the APP near fields of the receiving and transmitting terminals, if the APP can be matched with one of the receiving and transmitting terminal authorization codes, the APP adopts a first data protocol to perform read-write operation on the near-field communication module;

after the near field communication module is powered on, a power failure identifier and at least one receiving and transmitting terminal authorization code are set, and a request data format code, an outdoor unit address, an indoor unit address, a read-write effective data size and a CRC value are cleared.

In some embodiments of the present application, the requested data format code, the address of the outdoor unit, the address of the indoor unit, and the size of the read-write valid data respectively occupy four bytes under a first address in the first data space; the CRC value occupies two bytes under a second address in the first data space; the power-down identifier of the near-field communication module occupies a byte under a second address in the first data space, and a transceiving end authorization code occupies a byte under a third address in the first data space.

In some embodiments of the present application, the number of the at least one transceiving end authorization codes is four.

In some embodiments of the present application, the APP performs a read operation on the near field communication module by using a first data protocol, which specifically includes the following steps:

the APP writes a request data format code, an outdoor unit address and an indoor unit address;

the near field communication module reads the format code of the request data, the address of the outdoor unit and the address of the indoor unit;

if the request data format code is valid and the size of the read-write valid data is 0, the near field communication module writes data to the data interaction area of the first data space and performs CRC calculation;

writing the calculated CRC value at a location in the first data space where the CRC value is stored;

the near field communication module writes in the size of the read-write effective data;

when reading that the size of the read-write effective data is not 0, the APP reads data from a data interaction area of a first data space and performs CRC calculation;

and performing CRC check on the calculated CRC value and the written CRC value, wherein if the CRC check is passed, the APP writing-reading valid data size is 0.

In some embodiments of the present application, the APP performs a write operation on the near field communication module by using a first data protocol, which specifically includes the following steps:

if the request data format code is valid and the size of the read-write valid data is not 0, the near field communication module reads the data in the data interaction area of the first data space, performs CRC calculation, and then the size of the read-write valid data is 0;

when the APP reads that the size of the read-write effective data is 0, the APP writes data to the data interaction area of the first data space, and CRC calculation is carried out;

writing the calculated CRC value in the first data space at the location where the CRC value is stored;

and performing CRC check on the CRC value calculated by the near field communication module and the written CRC value, and if the CRC check is passed, writing, reading and writing the effective data size by the APP.

In some embodiments of the present application, the outdoor unit of an air conditioner further includes:

a second data space which is a part of the storage space and is different from the first data space, wherein a protocol header A 'and a protocol packet body B' of a second data protocol are stored in the second data space, the protocol header A 'comprises a power-down modification identifier, and the protocol packet body B' is positioned in a data interaction area of the second data space;

when the near field communication module is powered off, the APP excites the near field communication module, the APP adopts a second data protocol to modify a data interaction area of a second data space, and a power-down modification identifier is collocated to be 1;

and when the near field communication module is powered on and reads that the power failure modification mark is 1, the near field communication module uploads the data of the data interaction area of the second data space to the main control substrate.

In some embodiments of the present application, the protocol header a' also includes a valid data size and a CRC value.

In some embodiments of the present application, after the APP modifies the data interaction area of the second data space by using the second data protocol, the APP performs CRC value calculation, and writes the calculated CRC value into a location in the second data space where the CRC value is stored.

In some embodiments of the present application, the storage space is an EEPROM.

Compared with the prior art, the air conditioner outdoor unit provided by the application has the following advantages and beneficial effects:

(1) the method comprises the steps that a first data protocol of near-field communication of a near-field communication module and a transceiving end APP is set, and the near-field communication module is communicated with an outdoor unit main control substrate, so that the APP can be adopted to carry out data read-write operation on the near-field communication module, and the problems of a plurality of air conditioners after installation and sale are solved, such as machine disassembly is avoided, external equipment is not needed, debugging is convenient, and parameters are convenient to set;

(2) through the first data protocol who sets for, realize passing through each other of data information between air condensing units and the APP, efficiency and real-time are high.

The application also relates to an air conditioner, including the air conditioner indoor set and as above the air conditioner outdoor set, the air conditioner outdoor set with the communication of air conditioner indoor set.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a structural view of an outdoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is a layout view of a storage space in an embodiment of an outdoor unit of an air conditioner according to the present invention;

fig. 3 is a layout diagram of a first data space in an embodiment of an outdoor unit of an air conditioner according to the present invention;

fig. 4 is a block diagram illustrating operations performed on data among the APP, the near field communication module, and the main control substrate during a read operation of the APP;

fig. 5 is a flowchart illustrating a read operation of the APP on the near field communication module in the embodiment of the outdoor unit of the air conditioner according to the present invention by using the first data protocol;

fig. 6 is a flowchart illustrating that an APP writes data to a near field communication module during a read operation of the near field communication module in the embodiment of the outdoor unit of the air conditioner according to the present invention by using a first data protocol;

fig. 7 is a block diagram illustrating operations performed on data among the APP, the near field communication module, and the main control substrate during a write operation of the APP;

FIG. 8 is a flowchart illustrating a write operation of an APP on a near field communication module in an embodiment of an outdoor unit of an air conditioner according to the present invention using a first data protocol

Fig. 9 is a flowchart illustrating that the APP reads data from the near field communication module when the APP uses the first data protocol to write the near field communication module in the embodiment of the outdoor unit of the air conditioner;

fig. 10 is a layout view of a second data space in an embodiment of an outdoor unit of an air conditioner according to the present invention;

FIG. 11 is a block diagram illustrating operations performed on data between an APP and a NFC module during a modification operation of the APP;

fig. 12 is a flowchart illustrating that the APP uses the second data protocol to modify data of the near field communication module in the embodiment of the outdoor unit of the air conditioner.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Basic operation principle of air conditioner

The air conditioner performs a cooling and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The cooling and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

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

The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigerating effect by heat exchange with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor, an outdoor heat exchanger, and an outdoor fan, the indoor unit of the air conditioner includes a portion of an indoor heat exchanger and an indoor fan, and a throttling device (e.g., a capillary tube or an electronic expansion valve) may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner performs a heating mode when the indoor heat exchanger serves as a condenser, and performs a cooling mode when the indoor heat exchanger serves as an evaporator.

The indoor heat exchanger and the outdoor heat exchanger are switched to be used as a condenser or an evaporator, a four-way valve is generally adopted, and specific reference is made to the arrangement of a conventional air conditioner, which is not described herein any more.

The refrigeration working principle of the air conditioner is as follows: the compressor works to enable the interior of the indoor heat exchanger (in the indoor unit, the evaporator at the moment) to be in an ultralow pressure state, liquid refrigerant in the indoor heat exchanger is rapidly evaporated to absorb heat, air blown out by the indoor fan is cooled by the coil pipe of the indoor heat exchanger to become cold air which is blown into a room, the evaporated and vaporized refrigerant is compressed by the compressor, is condensed into liquid in a high-pressure environment in the outdoor heat exchanger (in the outdoor unit, the condenser at the moment) to release heat, and the heat is dissipated into the atmosphere through the outdoor fan, so that the refrigeration effect is achieved by circulation.

The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor to become high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the indoor heat exchanger (the condenser at the moment), is condensed, liquefied and released heat to become liquid, and simultaneously heats indoor air, so that the aim of increasing the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (an evaporator at the moment), is evaporated, gasified and absorbs heat to form gas, absorbs the heat of outdoor air (the outdoor air becomes cooler) to form gaseous refrigerant, and enters the compressor again to start the next cycle.

The air conditioner comprises an air conditioner outdoor unit and an air conditioner indoor unit communicated with the air conditioner outdoor unit.

The application mainly relates to near field communication of an air conditioner and a transceiving end APP, and particularly enables the air conditioner outdoor unit and the transceiving end APP to achieve near field transceiving of data.

The transceiver has a near field communication function, which may be a mobile phone, a computer or a PAD with a near field communication function.

Near Field Communication (NFC) is a short-range, high-frequency radio technology that operates at a frequency of 13.56MHz over a distance of 20 cm. The transmission speed is 106 Kbit/s, 212 Kbit/s or 424 Kbit/s.

The NFC technology enables identification and data exchange with compatible devices over short distances.

Outdoor machine of air conditioner

Referring to fig. 1, a near field communication module is disposed on an outer casing of an outdoor unit of an air conditioner, and the near field communication module and a main control substrate of the outdoor unit of the air conditioner adopt half-duplex asynchronous communication, for example, communication through a UART serial port.

The baud rate between the near-field communication module and the main control substrate is 9600bps, communication data consists of 11 bits in total, namely a start bit, a data bit, a parity check bit and a stop bit, and the check mode adopts even check.

The application mainly relates to a data protocol and data transmission between a near field communication module of an air conditioner outdoor unit and APP near field communication of a receiving and transmitting terminal.

The near field communication module is provided with a storage space, and the size of the storage space can be selected according to requirements.

Referring to fig. 2, the first data space is a part of the storage space, the second data space is a part of the storage space, and the size of the first data space and the size of the second data space may also be selected according to requirements.

In order to establish a first data protocol between the nfc module and the transceiver APP, information of a first data space is specifically set.

The first data space is capable of storing a protocol header a and a protocol body B of a first data protocol.

The protocol header A comprises a request data format code, an outdoor unit address, an indoor unit address, a read-write effective data size, a Cyclic Redundancy Check (CRC) value, a power-down identifier of the near-field communication module and at least one transceiving terminal authorization code.

The protocol packet body B is positioned in a data interaction area of the first data space and is marked as a data interaction area C.

Referring to fig. 3, the contents of the first data protocol stored within the first data space are shown.

In some embodiments of the application, the memory space is an EEPROM, which is 4 kbytes in size.

With a 32-bit system, 256 bytes of the address range of 0x 00-0 x3F can be used as an SRAM (Static Random-Access Memory) address map as the first data space.

The register addresses 00H, 01H, and 02H are used to store the header a, which occupies 12 bytes.

The above-mentioned format code of the requested data, the address of the outdoor unit, the address of the indoor unit, the size of the read-write effective data, the power failure identifier of the near field communication module and the authorization code of each transceiving end occupy one byte respectively, and the CRC value occupies two bytes.

The BYTE0 at the address 00H stores a request data format code, where the request data format code is a format code indicating a type of the request data, for example, a format code requesting to read a parameter of an outdoor unit fan is a first data format code, a format code requesting to read outdoor unit dial switch information is a second data format code, and the like, where the first data format code and the second data format code are both preset.

BYTE1 at address 00H stores the outdoor machine address.

BYTE2 at address 00H stores the indoor machine address.

The BYTE3 at address 00H stores a read-write valid data size that represents the amount of valid data for the data interaction area in the first data space.

BYTE0 and BYTE1 at address 01H store CRC values, where the CRC values are 16 bits.

The BYTE2 under the address of 01H stores the power-down identification of the near-field communication module, and whether the near-field communication module is electrified or not can be identified through the power-down identification.

When the power failure identifier is set to be 1, the power failure represents that the near field communication module is powered down; it can also be considered that when the power-down identifier is clear 0, it indicates that the near-field communication module is powered down, and specifically, the power-down identifier can be selected according to requirements.

In this application, when the near field communication module is powered on, the power-down flag stored in BYTE2 at the address 01H is set to 1.

The BYTE3 at address 01H is temporarily unused and can be used as a reserved address.

The BYTE0, BYTE1, BYTE2 and BYTE3 under the 02H address respectively store four transmitting and receiving end authorization codes, and the four transmitting and receiving end authorization codes are different and aim to verify the safety of communication between the transmitting and receiving end APP and the outdoor unit of the air conditioner.

In the first data space, the remaining space after the 03H address is used as a data exchange area for storing the protocol packet body B, wherein the storage size of the data exchange area is 244 bytes.

After the near field communication module is powered on, the BYTE0, the BYTE1, the BYTE2, the BYTE3 and the BYTE0, the BYTE1 and the BYTE3 of the 00H address are cleared, the BYTE2 of the 01H address is set to be 1, and the BYTE0, the BYTE1, the BYTE2 and the BYTE3 of the 02H address are set to be corresponding authorization APP codes.

The following transceiver end is described by taking a mobile phone with NFC function as an example.

When the mobile phone is close to the near field communication module, the APP can read the authorization code of the receiving and transmitting end of the 02H address, if the APP can be matched with the authorization code of the mobile phone, the APP authorization is successful, and the operation can be performed through the APP at the moment.

After the APP is successfully authorized, the APP reads a power-down identifier stored in BYTE2 of the 01H address, and is used for judging whether the near field communication module is electrified or not, if the near field communication module is electrified, the APP adopts a first data protocol and the near field communication module to perform read-write operation, and the reference is made to fig. 4 to 6.

If the nfc module is not powered, the APP uses a second data protocol (as will be explained below) to modify data in a data interaction area (denoted as data interaction area C') in the second data space, which will be described in detail below.

After that, when the near field communication module is electrified again, the modified data are uploaded to the main control substrate, so that the mobile phone APP can set parameters under the condition that the air conditioning unit is powered off, and the parameters are updated after the air conditioning unit is electrified.

Referring to fig. 4 to 9, data transmission between the APP and the nfc module using the first data protocol is described.

Wherein fig. 4-6 relate to read operations of APP; fig. 7 to 9 relate to write operations of APP.

APP read operation

Fig. 4 illustrates operations of data among the APP, the near field communication module, and the main control substrate when the APP performs a read operation; FIG. 5 shows a flow diagram of a read operation at an APP; fig. 6 shows a flow chart of data writing by the near field communication module when the APP performs a read operation.

S1: APP writing request data format codes, outdoor unit addresses and indoor unit addresses.

As described above, the request data format code, the outdoor unit address, and the indoor unit address are stored in BYTE0, BYTE1, and BYTE2 of write 00H, respectively, and thus, APP writes BYTE0, BYTE1, and BYTE2 of 00H (see fig. 4).

The request data format code is as described above, and is not described herein.

The outdoor unit address and the indoor unit address are known when configuring the air conditioner, and the outdoor unit address and the indoor unit address can be configured by setting a dial switch, for example.

S2: and writing data by the near field communication module.

As described in S1, after the APP writes the BYTE0, the BYTE1, and the BYTE2 at the 00H address, the near field communication module needs to acquire corresponding data from the main control substrate, and write the corresponding data into the data interaction area of the first data space in the near field communication module, so as to facilitate the APP read operation.

Referring to fig. 6, a flowchart of writing data by the nfc module is specifically shown.

S21: the near field communication module reads the format code of the request data, the address of the outdoor unit and the address of the indoor unit.

Specifically, the near field communication module reads BYTE0, BYTE1, BYTE2 (see fig. 4) of 00H, facilitating communication with the master substrate to obtain corresponding data.

S22: the NFC module determines whether the requested data format code is valid, if so, proceeds to S23, otherwise, returns to S21.

As described above, since the requested data format code is preset, it is possible to determine whether the format code is valid through matching, and if the requested data format code exists in the preset data format code, it indicates that the requested data format code is valid, otherwise, it is regarded as invalid.

S23: the near field communication module judges whether the size of the read-write effective data is 0, if so, the process goes to S24, and if not, the process returns to S21.

As described above, BYTE3 at address 00H stores the read-write valid data size.

The near field communication module reads BYTE3 at the address 00H and determines whether the read BYTE is 0.

S24: and the near field communication module writes data to the data interaction area C.

When BYTE3 at the address 00H is 0, it indicates that no data is stored, and therefore, the main control board transmits communication data to the near field communication module by communication between the near field communication module and the main control board.

The near field communication module writes the communication data from the 03H address (see fig. 4), i.e. writes the data in the data interaction area C.

S25: CRC calculation is performed on the data written in the data exchange area C.

For verification of the transmission reliability of the communication data, when the near field communication module writes data, the CRC is calculated, and a CRC value is obtained (CRC 1 is recorded) so as to be used for CRC verification at a later stage.

The CRC calculation method may be an existing calculation method, and is not described herein.

S26: and the near field communication module writes the calculated CRC value into the position where the CRC value is stored in the first data space.

The near field communication module writes the CRC1 to the BYTE0, BYTE1 at the 01H address (see fig. 4).

Since the CRC1 is sixteen bits, the upper eight bits of the CRC1 may be written in BYTE0 and the lower eight bits of the CRC1 in BYTE1, or the upper eight bits of the CRC1 may be written in BYTE1 and the lower eight bits of the CRC1 in BYTE 0.

S27: the near field communication module writes in the size of the read-write effective data.

After the data is written by the near field communication module, the obtained read-write valid data size is written into BYTE3 (see fig. 4) at the 00H address, so that the APP can perform a read operation.

S3: the APP reads and writes the valid data size.

That is, the APP reads BYTE3 (see FIG. 4) at the 00H address.

S4: whether the read-write valid data size is 0 is judged, if yes, the process returns to S3, and if no, the process goes to S5.

In S2, after the nfc module finishes writing data to the data interaction area C, the BYTE3 at the 00H address is not zero.

If the BYTE3 of the APP reading the 00H address is zero, it indicates that the near field communication module is still in the process of writing data, and the APP needs to continuously read the BYTE3 of the 00H address until the BYTE3 reading the 00H address is not zero.

S5: the APP starts reading the data in the data interaction area C and performs CRC calculation (see fig. 4).

For the communication data transmission reliability verification, CRC calculation is also performed on the data in the data interaction area C read by the APP to obtain a CRC value (denoted as CRC 2).

The CRC calculation here is also implemented using existing calculation methods.

S6: and judging whether the CRC passes, if so, proceeding to S7, otherwise, returning to S4.

The CRC check means that the CRC1 written in the BYTE0 and the BYTE1 in S26 is compared with the CRC2 calculated in S5, and if they match, it indicates that the CRC check is passed, otherwise, it indicates that the CRC check is not passed.

S7: the APP writes and reads the valid data size to be 0.

BYTE3 for APP write 00H address is 0 (see FIG. 4), at which point the APP read operation is complete.

APP write operations

Fig. 7 illustrates operations of data among the APP, the near field communication module, and the main control substrate when the APP performs a write operation; FIG. 8 shows a flow chart of a write operation at an APP; fig. 9 shows a flow chart of reading data by the near field communication module when the APP performs a write operation.

S1': APP writing request data format codes, outdoor unit addresses and indoor unit addresses.

S2': and reading data by the near field communication module.

As described in S1', after the APP writes the BYTE0, BYTE1, and BYTE2 at the 00H address, the near field communication module needs to know corresponding data from the main control substrate.

Referring to fig. 9, a flowchart of reading data by the near field communication module is specifically shown.

S21': the near field communication module reads the format code of the request data, the address of the outdoor unit and the address of the indoor unit.

Specifically, the near field communication module reads BYTE0, BYTE1, BYTE2 of 00H (see fig. 7).

S22': the nfc module determines whether the requested data format code is valid, if so, proceeds to S23', otherwise, returns to S21'.

S23': the nfc module determines whether the size of the read-write valid data is 0, returns to S21 'if yes, and proceeds to S24' if no.

As described above, BYTE3 at address 00H stores the read-write valid data size.

S24': and the near field communication module reads data from the data interaction area C.

When BYTE3 at the address 00H is not 0, it indicates that data is stored, and therefore, the near field communication module reads data from the address 03H (see fig. 7).

S25': CRC calculation is performed on the read data.

For verification of the transmission reliability of the communication data, when the near field communication module reads the data, the CRC is calculated, and a CRC value is obtained (recorded CRC 1') so as to be used for CRC verification at a later time.

S26': the size of the write-in read-write effective data of the near field communication module is 0.

After the near field communication module finishes reading the data, the BYTE3 (see fig. 7) with the read-write valid data size of 0 and the 00H address is updated to facilitate the write operation of the APP.

S3': the APP reads and writes the valid data size.

That is, the APP reads BYTE3 at the 00H address (see FIG. 7).

S4': whether the read-write valid data size is 0 is judged, if yes, the process goes to S5', and if not, the process returns to S3'.

In S2', the BYTE3 at the 00H address is zero after the nfc module reads the data.

If the BYTE3 of the APP reading the 00H address is not zero, it indicates that the near field communication module is still in the process of reading data, and the APP needs to continuously read the BYTE3 of the 00H address until the BYTE3 reading the 00H address is zero.

S5': the APP starts writing data into the data interactive area C and performs CRC calculation (see fig. 7).

For the verification of the transmission reliability of the communication data, the APP also performs CRC calculation on the data written in the data interaction area C to obtain a CRC value (denoted as CRC 2').

S6': the APP writes the calculated CRC value in the first data space at the location where the CRC value is stored.

The APP writes the CRC2' to the BYTE0, BYTE1 at the 01H address (see fig. 7).

Since the CRC2' is sixteen bits, the upper eight bits of the CRC2' may be written in BYTE0 and the lower eight bits of the CRC2' may be written in BYTE1, or the upper eight bits of the CRC2' may be written in BYTE1 and the lower eight bits of the CRC2' may be written in BYTE 0.

S7': and judging whether the CRC passes, if so, proceeding to S8', otherwise, returning to S4'.

The CRC check means that the CRC1' calculated in S25' is compared with the CRCs 2' written in the BYTE0 and the BYTE1, and if the two are identical, the CRC check is passed, otherwise, the CRC check is not passed.

S8': the APP writes and reads the valid data size.

After the APP writes data into the data interaction area C as in S5', the read-write valid data size changes, so that the APP writes the updated read-write valid data case at BYTE3 (see fig. 7) of the 00H address, at which point the APP write operation is completed.

Through near field communication between APP and the near field communication module as above, realize data read-write operation, be convenient for read operation through APP or modify the parameter and write in the near field communication module through APP, be convenient for to the air conditioner after-sales maintenance.

APP modification data

When the outdoor unit of the air conditioner is powered off, the near field communication module is also powered off at the moment, and data in the data interaction area C' in the near field communication module can be modified through near field communication between the APP and the near field communication module at the moment.

In order to establish the second data protocol between the near field communication module and the transceiving end APP by modifying data through the APP when the near field communication module is not powered, specifically referring to fig. 10, information of the second data space is set.

The second data space is capable of storing a protocol header a 'and a protocol body B' of a second data protocol.

The protocol header A' comprises effective data size, CRC value and power-down modification identification.

The protocol packet body B 'is located in the data interaction area of the second data space and is marked as a data interaction area C'.

Referring to fig. 10, the contents of the second data protocol stored within the second data space are shown.

With a 32-bit system, 8 bytes of the 0x4F and 0x50 address ranges may be used as the protocol header a'.

The valid data size and the power down modification flag as described above occupy one byte respectively, while the CRC value occupies two bytes.

BYTE0 under the 4FH address stores the effective data size.

BYTE1 and BYTE2 for 4FH addresses store CRC values, where the CRC values are 16 bits.

The BYTE3 under the 4FH address stores a power-down modification identifier, if the power-down modification identifier is set to 1, the data in the data interaction area C 'is modified through the APP, and if the power-down modification identifier is 0, the data in the data interaction area C' is not modified by the APP.

The power-down modification identifier is set to 0, which indicates that the data in the data interaction region C 'is modified by the APP, and if the power-down modification identifier is set to 1, which indicates that the APP does not modify the data in the data interaction region C', the power-down modification identifier can be specifically selected according to the requirement.

In the application, data in the data interaction area C' is modified through APP, and a power-down modification identifier stored in BYTE3 at the 4FH address is set to be 1.

BYTE0, BYTE1, BYTE2 and BYTE3 under the 50H address are not used for the moment and can be used as reserved addresses.

The storage area starting at the address of 51H is used as the data exchange area C', and the specific size of the storage space can be selected according to the requirement.

Fig. 11 illustrates the operation of data between APP and near field communication modules; FIG. 12 shows a flow diagram of a modify data operation at the APP.

S1': the receiving and transmitting end is close to the near field communication module and generates a radio frequency electromagnetic field.

The generated radio frequency electromagnetic field can excite the near field communication module to be electrified.

S2': the APP reads the power-down identification.

As described above, referring to fig. 4, the power-down flag of the near field communication module is stored in BYTE2 at the address of 01H.

The APP reads BYTE2 at the 01H address (see FIG. 11).

S3': and judging whether the power-down identifier is 0, if so, performing S4'', and if not, performing the APP read operation of the figure 5 or the APP write operation of the figure 8.

When the power failure identifier is set to be 1, the near field communication module is powered on; when the power down flag is 0, it indicates that the near field communication module is powered down (see fig. 11).

S4': the APP modifies the data in the data interaction region C' and performs CRC calculation (see FIG. 11).

The data interactive area C' starts from the address of 51H, so the APP starts to write data from 51H.

For the verification of the transmission reliability of the communication data, the APP also performs CRC calculation on the modified data in the data interaction region C to obtain a CRC value (denoted as CRC 3).

S5': the APP writes the calculated CRC value in the second data space at the location where the CRC value is stored.

The APP writes the CRC3 to BYTE1, BYTE2 at 4FH addresses (see fig. 11).

Since the CRC3 is sixteen bits, the upper eight bits of the CRC3 may be written in the BYTE1 at the 4FH address, and the lower eight bits of the CRC3 may be written in the BYTE2 at the 4FH address, or the upper eight bits of the CRC3 may be written in the BYTE2 at the 4FH address, and the lower eight bits of the CRC3 may be written in the BYTE1 at the 4FH address.

The CRC3 is used for CRC check when the near field communication module reads data in the data exchange area C'.

S6': and the APP modifies the power-down modification identifier.

As described above, the power down modification flag is stored in BYTE3 at the 4FH address, and thus, the BYTE3 at the APP modification 4FH address is 1.

After the near field communication module is powered on, the BYTE3 of the 4FH address is read, and if the BYTE3 of the 4FH address is read to be 1, it indicates that the APP has modified the data in the data interaction area C ', so the data in the data interaction area C' needs to be uploaded to the main control substrate for data synchronization.

According to the communication mode, when the near field communication module is electrified again, modified data are uploaded to the main control substrate conveniently, parameters can be set through the mobile phone APP under the condition that the air conditioning unit is powered off, and the parameters are updated after the air conditioning unit is electrified.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. An outdoor unit for an air conditioner, comprising:

2. The outdoor unit of claim 1, wherein,

the request data format code, the outdoor unit address, the indoor unit address and the read-write effective data respectively occupy four bytes under a first address in a first data space; the CRC value occupies two bytes under a second address in the first data space; the power-down identifier of the near-field communication module occupies a byte under a second address in the first data space, and a transceiving end authorization code occupies a byte under a third address in the first data space.

3. The outdoor unit of claim 2, wherein the number of the at least one transceiving terminal authorization codes is four.

4. The outdoor unit of claim 1, wherein the APP reads the nfc module by using a first data protocol, and specifically includes:

5. The outdoor unit of claim 1, wherein the APP writes the near field communication module using a first data protocol, which specifically includes the following:

6. The outdoor unit of any one of claims 1 to 5, further comprising:

7. The outdoor unit of claim 6, wherein the protocol header a' further includes a valid data size and a CRC value.

8. The outdoor unit of claim 6, wherein the APP uses the second data protocol to modify the data interactive area of the second data space, and then performs CRC value calculation, and writes the calculated CRC value into the second data space at a location where the CRC value is stored.

9. The outdoor unit of claim 1, wherein the storage space is an EEPROM.

10. An air conditioner comprising an indoor unit of an air conditioner, characterized in that the air conditioner further comprises an outdoor unit of an air conditioner according to any one of claims 1 to 9, the outdoor unit being in communication with the indoor unit of the air conditioner.