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Temperature detecting circuit and air conditioner

A temperature detection circuit and temperature sensor technology, applied in thermometers, instruments, measuring devices, etc., can solve problems such as temperature inaccuracy, reduce interference, improve anti-interference, and solve inaccurate temperature effects

Inactive Publication Date: 2015-05-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a temperature detection circuit and an air conditioner to solve the problem of inaccurate temperature detected by the temperature detection circuit in the prior art

Method used

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  • Temperature detecting circuit and air conditioner
  • Temperature detecting circuit and air conditioner
  • Temperature detecting circuit and air conditioner

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the terms "fir...

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Abstract

The invention discloses a temperature detecting circuit and an air conditioner. The temperature detecting circuit comprises a temperature sensor, a constant current source circuit which is connected with the temperature sensor to provide constant current power to the temperature sensor, an amplifying circuit which is connected with the output end of the constant current source circuit to amplify a signal output by the constant current source circuit and synchronously removing common doe interface at two ends of the temperature sensor, and a filter circuit which is connected with the amplifying circuit. With the adoption of the temperature detecting circuit, the problem that the inaccurate temperature detected by the temperature detecting circuit in the prior art can be solved, and the effect of improving the accuracy of temperature detected by the temperature detection circuit can be achieved.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a temperature detection circuit and an air conditioner. Background technique [0002] At present, the temperature detection of the motor winding of large central air-conditioning compressors uses a PT100 temperature sensor, which uses a signal acquisition and conversion circuit designed by a dedicated integrated chip inside, and finally outputs a voltage or current measurement signal. This kind of PT100 temperature sensor has high acquisition accuracy and good effect. However, when the PT100 temperature sensor is arranged inside the motor of a large central air-conditioning compressor, since the operating current of the compressor is several hundred amperes, there is extremely strong electromagnetic interference, which makes the temperature detection circuit Effective detection cannot be realized, resulting in inaccurate detected temperature. [0003] For the problem of inaccurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/20F24F11/02
Inventor 陈万兴王驰孙亚丽程建军
Owner GREE ELECTRIC APPLIANCES INC
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