Variable frequency air conditioner detector

Abstract

The utility model discloses a frequency conversion air conditioner detector, include: control module, with control module electric nature connection selection module, selection module at least includes analog indoor unit interface or analog outdoor unit interface, control module electric nature connection display module, analog indoor unit interface or analog outdoor unit interface receives and sends communication signal, and control module identifies the communication content of the air conditioner of being detected, reads the operating parameter of the air conditioner of being detected through analog indoor unit interface or analog outdoor unit interface, and shows through display module. The utility model simple structure has increased analog indoor and outdoor unit communication signal function, can judge whether the function of indoor and outdoor unit circuit board is normal quickly, the utility model's detector structure is small and exquisite, and the operation is simple, can position the air conditioner trouble reason quickly, provides the maintenance efficiency of after-sales, is convenient to carry, the utility model can adopt LCD liquid crystal screen, compares traditional LED nixie tube display, and the display is clearer.

Description

Technical Field

[0001] This utility model belongs to the field of detection device technology, specifically relating to a variable frequency air conditioner detector. Background Technology

[0002] An air conditioner tester is an instrument used to detect whether an air conditioner is malfunctioning. Currently, most testers on the market have limited functionality, limited display capabilities, and are cumbersome to operate. This makes it difficult for after-sales engineers to accurately locate the fault when repairing inverter air conditioners. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model provides a variable frequency air conditioner tester, comprising: a control module and a selection module electrically connected to the control module, the selection module including at least a simulated indoor unit interface or a simulated outdoor unit interface, the control module being electrically connected to a display module, the simulated indoor unit interface or the simulated outdoor unit interface receiving and sending communication signals, the control module identifying the communication content of the air conditioner being tested, reading the operating parameters of the air conditioner being tested through the simulated indoor unit interface or the simulated outdoor unit interface, and displaying them through the display module.

[0004] The control module includes a control chip and performs the following functions: receiving and sending communication signals, identifying the air conditioner's communication content, reading the air conditioner's operating parameters, and then sending them to the display module to display the corresponding data content; and identifying key signals.

[0005] The selection module also includes a data reading interface and several button control circuits. The level of the control chip of the control module is controlled by the buttons to select different selection circuits.

[0006] This invention employs four buttons. When a button is pressed, the pin of the control chip changes from a high level to a low level. The control chip detects the change in the electrical frequency of the corresponding pin and executes the corresponding function.

[0007] It also includes a communication circuit, which is connected to a selection circuit. The communication circuit includes a first optocoupler, which is connected to the transmitter port of the control chip. The communication circuit also includes a second optocoupler, which is connected to the receiver port of the control chip.

[0008] The fourth pin of the second optocoupler is connected to the second pin of the first optocoupler, the second pin of the second optocoupler is connected to the collector of the first transistor, the base of the first transistor is connected to the receiving port of the control chip, and the first pin of the first optocoupler and the third pin of the second optocoupler respectively form the data transmission port and the data receiving port of the data reading interface.

[0009] Data transmission and reception: When the control chip sends a signal, its IN-TX pin outputs a high level, the first transistor is turned on, the second optocoupler is turned on, and the air conditioner under test receives the communication signal and simultaneously sends a corresponding communication signal; when the first optocoupler is turned on, the control chip receives the communication signal sent by the air conditioner, processes the signal content, and reads out various data of the air conditioner's operation.

[0010] It also includes a power conversion circuit, comprising a live wire, a neutral wire, and a transformer, which converts AC power into DC power via a rectifier bridge for use. 220V AC power is converted to 12VAC by transformer T1, then to 12VDC by the rectifier bridge, and finally to 5VDC by the battery management chip to power the aforementioned components.

[0011] It also includes a housing, on which a light-transmitting portion or a first through-hole is provided for the display output of the display module. The housing also has a second through-hole for the communication cable of the communication circuit to be routed through. Finally, the housing has a second through-hole for mounting several buttons.

[0012] This utility model connects the air conditioner's circuit board via a communication cable.

[0013] Compared with the prior art, the advantages of this utility model are as follows: This utility model has a simple structure and adds the function of simulating communication signals between indoor and outdoor units, which can quickly determine whether the circuit boards of indoor and outdoor units are functioning normally; the detector of this utility model has a compact structure, is easy to operate, can quickly locate the cause of air conditioner failure, improve after-sales repair efficiency, and is easy to carry; this utility model can use an LCD screen, which is clearer than the traditional LED digital tube display. Attached Figure Description

[0014] Figure 1 This is a block diagram of the control part of this utility model;

[0015] Figure 2 This is a circuit diagram of the power conversion circuit of this utility model;

[0016] Figure 3 This is a circuit diagram of the communication circuit of this utility model;

[0017] Figure 4 This is the circuit diagram for the control chip section;

[0018] Figure 5 This is a perspective view of the present utility model;

[0019] Figure label:

[0020] 1. Button control circuit; 2. Display module; 3. Power conversion circuit; U1 control chip; 4. Communication circuit; 5. Simulated indoor unit interface; 6. Data reading interface; 7. Simulated outdoor unit interface; 8. First perforation; 9. Second perforation; 10. Housing. Detailed Implementation

[0021] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model concept, and are only a part of the embodiments of this utility model. The specific and direct description of related structures is only for the convenience of understanding this utility model, and the specific features do not necessarily or directly limit the scope of implementation of this utility model.

[0022] Referring to the accompanying drawings, the present invention adopts the following technical solution: a variable frequency air conditioner tester, comprising: a control module and a selection module electrically connected to the control module, the selection module including at least a simulated indoor unit interface 5 or a simulated outdoor unit interface 7, the control module being electrically connected to a display module 2, the simulated indoor unit interface 5 or the simulated outdoor unit interface 7 receiving and sending communication signals, the control module identifying the communication content of the air conditioner being tested, reading the operating parameters of the air conditioner being tested through the simulated indoor unit interface 5 or the simulated outdoor unit interface 7, and displaying them through the display module 2.

[0023] The control module includes a control chip U1, which performs the following functions: receiving and sending communication signals, identifying the air conditioner communication content, reading the air conditioner operating parameters, and then sending them to the display module 2 to display the corresponding data content; and identifying key signals.

[0024] The selection module also includes a data reading interface 6 and several key control circuits 1. The control chip U1 of the control module is controlled by the keys to select different selection circuits.

[0025] This utility model uses four buttons. When a button is pressed, the pin of the control chip U1 changes from high level to low level. The control chip U1 detects the change in the electrical frequency of the corresponding pin and executes the corresponding function.

[0026] It also includes a communication circuit 4, which is connected to the selection circuit. The communication circuit 4 includes a first optocoupler IC1, which is connected to the transmitter port of the control chip U1. The communication circuit 4 also includes a second optocoupler IC2, which is connected to the receiver port of the control chip U1.

[0027] Pin 4 of the second optocoupler IC2 is connected to pin 2 of the first optocoupler IC1. Pin 2 of the second optocoupler IC2 is connected to the collector of the first transistor Q1. The base of the first transistor Q1 is connected to the receiving port of the control chip U1. Pin 1 of the first optocoupler IC1 and pin 3 of the second optocoupler IC2 form the data sending port and data receiving port of the data reading interface 6, respectively.

[0028] Data transmission and reception: When the control chip U1 sends a signal, its IN-TX pin outputs a high level, the first transistor is turned on, the second optocoupler is turned on, and the air conditioner under test receives the communication signal and simultaneously sends a corresponding communication signal; when the first optocoupler is turned on, the control chip U1 receives the communication signal sent by the air conditioner, processes the signal content, and reads out various data of the air conditioner's operation.

[0029] It also includes a power conversion circuit 3, comprising a live wire, a neutral wire, and a transformer, which converts AC power into DC power via a rectifier bridge for use. 220V AC power is converted to 12VAC via transformer T1, then to 12VDC via a rectifier bridge, and finally to 5VDC via battery management chip IC0 to power the aforementioned components.

[0030] like Figure 2 The P1 port is connected to the live wire; the P2 port is connected to the neutral wire.

[0031] It also includes a housing 10, on which a light-transmitting portion or a first through-hole 8 is provided for the display output of the display screen of the display module 2. The housing 10 also has a second through-hole 9 for the communication line of the communication circuit 4 to be routed through. Furthermore, the housing 10 has second through-holes 9 for mounting several buttons.

[0032] This utility model connects the air conditioner's circuit board via a communication cable.

[0033] When putting it into use: connect the live wire, neutral wire, and communication line of the detector to the circuit of the air conditioner being tested, that is, connect it to the power supply terminals of the circuit boards of the indoor and outdoor units. Select the module by pressing the button and switch the interface of the control chip U1.

[0034] 1. Use data reading interface 6 to read data; read the overall operating data of the air conditioner, such as the overall current, voltage, power, compressor operating frequency, electronic expansion valve opening, fan speed, ambient temperature, fault codes, etc.

[0035] 2. Using the simulated indoor unit interface 5: This simulates normal indoor unit communication signals. When it's impossible to determine if the outdoor unit circuit board is faulty, this function can send correct data to the outdoor unit circuit board, such as set temperature, indoor fan speed, ambient temperature, and other indoor unit data. This allows you to check if the outdoor unit is operating normally, thus determining if the outdoor unit circuit board is functioning correctly.

[0036] 3. Using the simulated outdoor unit interface 7: This simulates normal outdoor unit communication signals. When it's impossible to determine if the indoor unit circuit board is faulty, this function can send correct data to the indoor unit circuit board, such as compressor operating frequency, outdoor fan speed, exhaust temperature, and other outdoor unit data. This allows you to check if the indoor unit is operating normally, thus determining if the indoor unit circuit board is functioning correctly.

[0037] Move the button down; switch to the next item. If there is a lot of information, you may need to flip through pages to find it.

[0038] Move the button up; switch to the previous item.

[0039] Press the back button; return to the initial screen.

[0040] Compared with the prior art, the advantages of this utility model are as follows: This utility model has a simple structure and adds the function of simulating communication signals between indoor and outdoor units, which can quickly determine whether the circuit boards of indoor and outdoor units are functioning normally; the detector of this utility model has a compact structure, is easy to operate, can quickly locate the cause of air conditioner failure, improve after-sales repair efficiency, and is easy to carry; this utility model can use an LCD screen, which is clearer than the traditional LED digital tube display.

[0041] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A variable frequency air conditioner tester, characterized in that: include: The control module and the selection module electrically connected to the control module include at least a simulated indoor unit interface (5) or a simulated outdoor unit interface (7). The control module is electrically connected to the display module (2). The simulated indoor unit interface (5) or the simulated outdoor unit interface (7) receives and sends communication signals. The control module identifies the communication content of the air conditioner being tested, reads the operating parameters of the air conditioner being tested through the simulated indoor unit interface (5) or the simulated outdoor unit interface (7), and displays them through the display module (2).

2. The variable frequency air conditioner tester according to claim 1, characterized in that: The selection module also includes a data reading interface (6), and the selection module includes several key control circuits (1), which control the level of the control chip (U1) of the control module through the keys to select different selection circuits.

3. The variable frequency air conditioner tester according to claim 1, characterized in that: It also includes a communication circuit (4), which is connected to the selection circuit. The communication circuit (4) includes a first optocoupler, which is connected to the transmitter port of the control chip (U1). The communication circuit (4) also includes a second optocoupler, which is connected to the receiver port of the control chip (U1).

4. The variable frequency air conditioner tester according to claim 3, characterized in that: The fourth pin of the second optocoupler is connected to the second pin of the first optocoupler, the second pin of the second optocoupler is connected to the collector of the first transistor, the base of the first transistor is connected to the receiving port of the control chip (U1), and the first pin of the first optocoupler and the third pin of the second optocoupler respectively form the data sending port and the data receiving port of the data reading interface (6).

5. The variable frequency air conditioner tester according to claim 1, characterized in that: It also includes a power conversion circuit (3), which includes a live wire, a neutral wire, and a transformer, to convert AC power into DC power through a rectifier bridge for use.

6. The variable frequency air conditioner tester according to claim 1, characterized in that: It also includes a housing (10), on which a light-transmitting part or a first perforation (8) is provided for the display output of the display module (2).

7. The variable frequency air conditioner tester according to claim 6, characterized in that: The outer casing (10) has a second through hole (9) for the communication line of the communication circuit (4) to be connected.

8. The variable frequency air conditioner tester according to claim 6, characterized in that: The outer casing (10) has a second through hole (9) for mounting a number of buttons.

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