GHP-based data level converter

Abstract

The utility model discloses a data level converter based on a GHP, and belongs to the field of GHP gas heat pump control. According to the technical scheme, a data analysis circuit used for analyzing an OPT data logic level into a TTL logic level is connected with a level conversion circuit used for converting the analyzed TTL logic level into a three-wire system RS-232 bus interface; the power supply unit is used for supplying power to the data analysis circuit and the level conversion circuit; the power supply unit is respectively connected with the data analysis circuit and the level conversion circuit; and the RS-232 level output module is connected with the level conversion circuit. The GHP-based data level converter has the beneficial effects that the GHP can be connected with external equipment, the flexible expansion capability of the GHP function is greatly improved, interconnection and intercommunication between the GHP and various equipment are realized, and a bridge foundation is provided for expanding more abundant functions of the GHP in the future.

Description

Technical Field

[0001] The utility model belongs to the field of data level converter in GHP gas heat pump control, relates to RS-232 bus interface expansion of GHP gas heat pump, and particularly relates to a data level converter based on GHP. Background Art

[0002] With the introduction of low-level logic, it is difficult to establish a connection between GHP and peripheral devices in GHP applications. The input and output logic of the OPT interface is inconsistent with the peripheral devices, which increases the complexity of GHP system expansion and design. The RS-232 bus interface establishes a reliable communication channel between GHP and external devices, realizing bidirectional data transmission. It allows GHP to connect with various peripheral devices, such as PLC, sensors, etc. Through the RS-232 bus interface, GHP can send instructions and receive responses from external devices to achieve device control and data exchange. This makes the RS-232 bus interface the key to data transmission between many systems and devices. Compared with traditional user GHP, GHP cannot communicate with external devices. By connecting GHP with external devices through a data level converter, flexible expansion of GHP functions can be achieved. After GHP converts the RS-232 bus interface, it can be interconnected with controllers that support the RS-232 bus interface, such as commonly used PLC, touch screen, inverter and other devices, increasing the expansion capability of GHP and providing a technical foundation for GHP to expand peripheral devices, IoT data collection and other functions in the future.

[0003] In summary, it is very necessary to develop a data level converter based on GHP. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a data level converter based on GHP, which can establish a connection between GHP and external devices, greatly improving the flexible expansion capability of GHP functions.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A GHP-based data level converter, comprising:

[0007] A data parsing circuit for parsing the OPT data logic level into a TTL logic level, connected to a level conversion circuit for converting the parsed TTL logic level into a 3-wire RS-232 bus interface;

[0008] A power supply unit for supplying power to the data parsing circuit and the level conversion circuit, wherein the power supply unit is connected to the data parsing circuit and the level conversion circuit respectively;

[0009] The RS-232 level output module is connected to the level conversion circuit.

[0010] Furthermore, the data analysis circuit includes an OPT terminal interface for connecting to an OPT terminal of the GHP main control substrate.

[0011] Furthermore, the data analysis circuit includes a TXD interface and a RXD interface for connecting to a controller.

[0012] Furthermore, the level conversion circuit adopts a MAX3232 chip.

[0013] Furthermore, the power supply unit adopts the MC34063AD voltage conversion chip.

[0014] Beneficial effects of the utility model:

[0015] Compared with the prior art, the GHP-based data level converter described in the utility model converts the parsed TTL level into a 3-wire RS-232 bus interface through a level conversion circuit through a MAX232 chip and peripheral circuits; converts the difficult-to-identify OPT data logic level into a more easily recognizable TTL logic level through a data parsing circuit; the power supply unit supplies power to the data parsing circuit and the level conversion circuit, thereby enabling the GHP to establish a connection with external devices, greatly improving the flexible expansion capability of the GHP function, realizing the interconnection between the GHP and a variety of devices, and providing a bridge foundation for the future expansion of GHP with more abundant functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a logic flow chart of connecting the GHP substrate of the utility model to peripheral devices through a level converter. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Figure 1-2 The GHP-based data level converter is further described.

[0020] Example 1

[0021] In the application of GHP, the main devices include the GHP gas heat pump main control substrate and the data level converter. The OPT circuit interface on the GHP main substrate is an expansion interface for connecting GHP external devices (dedicated substrate). This interface is a special interface that can only be connected to specific devices, and the communication data logic level is special and cannot be compatible with the connection of other devices.

[0022] like Figure 1 and Figure 2 As shown, this embodiment 1 provides a data level converter based on GHP, including a power supply unit, a data analysis circuit, and a level conversion circuit. The entire GHP control system establishes an extended connection with an external device through the data level converter and completes information exchange with the external device through an RS-232 bus interface.

[0023] The GHP data level converter analyzes the OPT communication interface of the GHP main control substrate through a data analysis circuit. The OPT communication interface is analyzed into TTL level. The voltage range of 2V to 5V is called high level, and 0V to 0.8V is called low level. High level is equivalent to logic "1", and low level is equivalent to logic "0".

[0024] The data level converter of the GHP converts the logic level of the OPT interface in the GHP into the TTL level through an analysis circuit, and then converts the TTL level into the RS-232 bus interface.

[0025] The GHP data level converter, the OPT interface in the GHP is a half-duplex communication with two signal lines, and data transmission can only be carried out alternately between two directions, that is, at the same time, data can only be transmitted in one direction. The data level is 0 to 13V, the level signal is special and requires the GHP main control substrate to cooperate with the control to distinguish between logic "1" and logic "0", and common devices are difficult to be compatible with this interface.

[0026] The data level converter of the GHP and the RS-232 bus interface can realize full-duplex communication. In general applications, a simple full-duplex communication process can be realized by using three signal lines (receiving line, transmitting line and signal line).

[0027] The power supply unit provides power support for the data analysis circuit and level conversion, converting the OPT interface with a level of 0-13V to an RS-232 bus interface.

[0028] Convert the special two-wire OPT interface used on GHP to a more common three-wire RS-232 bus interface.

[0029] Through the data level converter, the OPT circuit interface on the GHP main substrate is converted to a universal RS-232 bus interface. Compared with the traditional GHP control system, the GHP expansion capability is greatly improved, and the connection between GHP and controllers supporting RS-232 bus interface can be realized, and the interconnection between GHP and various devices can be realized, which provides a bridge foundation for the future expansion of GHP with more rich functions.

[0030] Example 2

[0031] This embodiment is a new embodiment or a supplement to Embodiment 1.

[0032] This embodiment provides a data level converter based on GHP, including a power supply unit, a data analysis circuit, and a level conversion circuit. The data analysis circuit is connected to the level conversion circuit; the power supply unit is respectively connected to the data analysis circuit and the level conversion circuit; and an RS-232 level output module is connected to the level conversion circuit.

[0033] The data level converter of the GHP parses the OPT interface data in the GHP into TTL level, and then converts the TTL level into the RS-232 bus interface.

[0034] The GHP data level converter, the OPT interface in the GHP is a half-duplex communication with two signal lines, and data transmission can only be carried out alternately between two directions, that is, at the same time, data can only be transmitted in one direction. The data level is 0 to 13V, the level signal is special and requires the GHP main control substrate to cooperate with the control to distinguish between logic "1" and logic "0", and common devices are difficult to be compatible with this interface.

[0035] The data level converter of the GHP and the RS-232 bus interface can realize full-duplex communication. In general applications, a simple full-duplex communication process can be realized by using three signal lines (receiving line, transmitting line and signal line).

[0036] 1. The power supply unit is the power supply for the data analysis circuit and the level conversion circuit. The power input of the data level converter is 24V DC. Through the MC34063AD voltage conversion chip and peripheral circuits, the 24V DC is converted into 5V DC to drive the data analysis circuit and the level conversion circuit.

[0037] 2. The level conversion circuit converts the parsed TTL level into a 3-wire RS-232 bus interface through the MAX232 chip and peripheral circuits.

[0038] 1) In TTL level, the voltage of 2V to 5V is called high level, and 0V to 0.8V is called low level.

[0039] A high level is equivalent to a logic "1" and a low level is equivalent to a logic "0".

[0040] 2) The RS-232 bus interface high level voltage range is +3 to +15V, and the low level voltage range is -3 to -15V.

[0041] A high level is equivalent to a logic "1" and a low level is equivalent to a logic "0".

[0042] 3) After the RXD of the RS-232 bus interface receives the logic "1" or "0", it is converted into TTL level and sent to the data analysis circuit logic "1" or "0" through the TXD pin.

[0043] 4) After the data analysis circuit receives the logic "1" or "0", it performs level conversion through the level conversion circuit, and the TXD pin of the RS-23 bus sends the logic "1" or "0".

[0044] 3. The data analysis circuit converts the difficult-to-recognize OPT data logic level into the easier-to-recognize TTL logic level.

[0045] 1) The OPT port of the GHP control board sends data logic "1" or "0", and the analysis circuit interprets the received data as TTL level logic "1" or "0"

[0046] 2) When the OPT port of the GHP control board receives data, the analysis circuit converts the logic "1" or "0" into the logic "1" or "0" that the OPT port can recognize.

[0047] 3) The OPT port data analysis of the GHP control substrate requires the cooperation between the GHP substrate and the data level converter. The data level converter is a dedicated level analysis of the GHP.

[0048] 4) When the OPT port of the GHP control substrate sends data, the internal receiving data pin is forced to a high level. At this time, the OPT port and the data analysis circuit form a receiving and analyzing data loop. At this time, the data analysis loop only receives data.

[0049] 5) When the OPT port of the GHP control substrate receives data, the internal data transmission pin is forced to a high level. At this time, the OPT port and the data analysis circuit form a data transmission and analysis loop. At this time, the data analysis loop only sends data.

[0050] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and utility model concept of the utility model within the technical scope disclosed by the utility model. Without departing from the concept of the utility model, simple deductions and substitutions can also be made, which should be covered by the protection scope of the utility model.

Claims

1. A data level converter based on GHP, characterized in that: include: A data parsing circuit for parsing the OPT data logic level into a TTL logic level, connected to a level conversion circuit for converting the parsed TTL logic level into a 3-wire RS-232 bus interface; A power supply unit for supplying power to the data parsing circuit and the level conversion circuit, wherein the power supply unit is connected to the data parsing circuit and the level conversion circuit respectively; The RS-232 level output module is connected to the level conversion circuit.

2. The GHP-based data level converter according to claim 1, wherein: The data analysis circuit includes an OPT terminal interface for connecting to an OPT terminal of a GHP main control substrate.

3. The GHP-based data level converter according to claim 1, wherein: The data analysis circuit includes a TXD interface and a RXD interface for connecting to a controller.

4. The GHP-based data level converter according to claim 1, wherein: The level conversion circuit adopts the MAX3232 chip.

5. The GHP-based data level converter according to claim 1, wherein: The power supply unit adopts MC34063AD voltage conversion chip.

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