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Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment

A fault detection circuit and circuit technology, applied in the direction of measuring electricity, measuring electrical variables, lighting and heating equipment, etc., can solve the problem of high cost, and achieve the effect of improving accuracy, simple circuit structure and reducing cost

Pending Publication Date: 2019-12-20
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiments of the present invention provide a fault detection circuit with a simplified structure, a fault judgment method, and air-conditioning equipment to solve the problem in the prior art that the detection elements such as the temperature sensor and the pressure sensor are independently connected to the main board and the cost is relatively high

Method used

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  • Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment
  • Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment
  • Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment

Examples

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Effect test

Embodiment 1

[0060] figure 1 It is a structural diagram of a fault detection circuit according to an embodiment of the present invention, such as figure 1 As shown, the circuit includes:

[0061] The pressure switch element K is connected in series with the first resistor R1 to form the first branch circuit, wherein the pressure switch element K is used to disconnect when the air conditioner has a pressure failure; the temperature limiting element 10 is connected in series with the second resistor R2 to form the second branch circuit. A branch circuit, wherein the temperature limiting element 10 is used to disconnect when the air conditioner has a temperature failure; the second branch circuit is connected to both ends of the air conditioner main board 20 in parallel with the first branch circuit.

[0062] In specific implementation, the temperature limiting element 10 and the pressure switch element K are installed on the exhaust pipeline or on the high temperature side of the compressor...

Embodiment 2

[0065] image 3 It is a structural diagram of a fault detection circuit according to another embodiment of the present invention, such as image 3 As shown, the circuit includes all elements in the specific embodiment 1, and in addition, the inside of the air-conditioning main board 20 is also provided with:

[0066] The resistance detection unit 201 is connected to the first branch and the second branch, and is used to obtain the resistance detection value of the fault detection circuit and transmit it to the judgment unit; the timing unit 202 is connected to the first branch and the second branch, used to calculate the fault duration of the pressure fault or temperature fault, and transmit it to the judging unit; the judging unit 203, used to judge the fault according to the resistance detection value and the fault duration Type and location of failure. Assuming that the resistance value of the first resistor R1 is n1, and the resistance value of the second resistor R2 is ...

Embodiment 3

[0069] Figure 4 It is a structural diagram of a fault detection circuit according to another embodiment of the present invention, such as Figure 4 As shown, the circuit includes all the components in the specific embodiment 2, and also includes: a temperature sensor 30, one end of which is connected to the line drawn after the first branch is connected in parallel with the second branch, and the other end is connected to the main board of the air conditioner for Check the temperature of the air conditioning system.

[0070] A temperature sensor 30 is set on the main road after the first branch and the second branch are connected in parallel, and the temperature sensor 30 is set on the outlet pipeline of the condenser, so as to obtain the temperature value at the outlet of the condenser. When the temperature value is lower than the set value, the air conditioner is controlled to enter the defrosting mode. Although the temperature limiting element 10 is set in Embodiment 1 a...

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Abstract

The invention discloses a fault detection circuit with a simplified structure, a fault judgment method and air conditioning equipment. The fault detection circuit comprises a first branch circuit anda second branch circuit, wherein the first branch circuit is formed by connecting a pressure switch element and a first resistor in series, and the pressure switch element is used for switching off when an air conditioner has a pressure fault; the second branch circuit is formed by connecting a temperature limiting element and a second resistor in series, and the temperature limiting element is used for switching off when the air conditioner has a temperature fault; and the second branch circuit and the first branch circuit are connected in parallel to both ends of an air conditioning mainboard. By adopting the fault detection circuit, the temperature limiting element and the pressure switch element are respectively utilized to switch off the circuit timely when the temperature or pressureof an air conditioning system is abnormal, the air conditioning mainboard judges whether a fault occurs or not and a specific type of the fault by detecting the total resistance value of the circuit,the circuit structure is simple, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a fault detection circuit with a simplified structure, a fault judgment method and an air conditioner. Background technique [0002] In order to ensure the reliable operation of the air conditioning system, the air conditioning system will increase the exhaust high temperature protection and the pressure protection judgment control of the air conditioning system. At present, the following problems exist: [0003] 1. There is a hysteresis in detecting the exhaust gas temperature by the temperature sensor, so that the temperature abnormality in the air conditioner cannot be processed in time, which affects the life of the air conditioner system; 2. Generally, the detection components such as the temperature sensor and the pressure sensor are connected to the main board independently, so multiple The detection circuit realizes the control, and the cost is relatively high. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02F24F11/88F24F11/38
CPCF24F11/38F24F11/88
Inventor 张铭钊陈泽波江标王宁张凤梅植雄智张奕强郑贵金
Owner GREE ELECTRIC APPLIANCES INC