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Vehicle air conditioning apparatus

A technology for air-conditioning devices and vehicles, which can be used in vehicle components, applications, household heating, etc., and can solve problems such as the inability to filter and the decline in the collection capacity

Active Publication Date: 2019-09-03
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the vehicle air conditioner described in Patent Document 1, there is a possibility that the decrease in the collection capacity of the filter cannot be detected from the pressure detected by the pressure sensor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0025] First, a first embodiment of the vehicle air conditioner will be described.

[0026] Such as figure 1 As shown, the vehicle air conditioner 1 of the present embodiment includes an air conditioning duct 10 and an air conditioning unit 20 . The vehicle air conditioner 1 is installed inside the dashboard of the vehicle.

[0027] An air passage 11 is formed inside the air-conditioning duct 10 , and the air passage 11 guides air-conditioning air for air-conditioning the interior of the vehicle into the interior of the vehicle. In the air passage 11, air flows in the direction indicated by the arrow A in the figure. An outside air inlet 12 and an inside air inlet 13 are formed in an upstream portion of the air conditioning duct 10 in the air flow direction A as a portion for taking in air from the outside of the air conditioning duct 10 into the air passage 11 . The outside air inlet 12 is a portion that takes in outside air, which is air outside the vehicle, into the air ...

no. 2 approach ＞

[0086] Next, a second embodiment of the vehicle air conditioner 1 will be described. Hereinafter, the description will focus on differences from the first embodiment.

[0087] The ECU 80 of this embodiment replaces image 3 The filter capacity determination process shown in the figure is executed when the vehicular air conditioner 1 starts to operate. Figure 8 Shown is the filter capability determination process. That is, first, as the process of step S30 , ECU 80 detects first dust concentration CD20 based on detection signal VD of dust sensor 70 . The first dust concentration CD20 is the dust concentration detected by the dust sensor 70 when the vehicle air conditioner 1 starts to operate. Thereafter, the ECU 80 starts measurement of the elapsed time Ta as processing in step S31. That is, the ECU 80 starts measuring the elapsed time Ta from the time when the first dust concentration CD20 is detected. Next, as the process of step S32, the ECU 80 determines whether or no...

no. 3 approach ＞

[0099] Next, a third embodiment of the vehicle air conditioner 1 will be described. Hereinafter, the description will focus on differences from the first embodiment.

[0100] The ECU 80 of this embodiment replaces image 3 The filter capacity determination process shown in the figure is executed when the operation of the vehicle air conditioner 1 is started. Figure 10 Shown is the filter capability determination process. That is, first, ECU 80 starts detection of dust concentration CD40 based on detection signal VD of dust sensor 70 as processing in step S40 , and starts measurement of elapsed time Ta as processing in step S41 .

[0101]Thereafter, the ECU 80 determines whether or not the elapsed time Ta has exceeded a predetermined time Tth31 as a process of step S42. If affirmative determination is made in the process of step S42, that is, if the elapsed time Ta exceeds the predetermined time Tth31, as the process of step S43, the ECU 80 judges that the dust sensor has r...

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Abstract

The purpose of the present disclosure is to provide a vehicle air conditioning apparatus capable of detecting decrease of collection capability of a filter with high accuracy. A vehicle air conditioning apparatus (1) performs air conditioning for a vehicle cabin by blowing out air flowing in an air conditioning duct (10) into the vehicle cabin. The vehicle air conditioning apparatus is provided with a filter (17), a dust sensor (70), and a determination unit (80). The filter collects dust included in the air flowing in the air conditioning duct. The dust sensor detects the dust concentration of the air flowing in the air conditioning duct. The determination unit determines whether or not the collection capability of the filter decreases, on the basis of the dust concentration detected by the dust sensor.

Description

[0001] Cross-references to related applications [0002] This application is based on and claims the benefit of priority of Japanese Patent Application No. 2017-008781 for which it applied on January 20, 2017, The content of this patent application is incorporated in this specification by reference. technical field [0003] The present invention relates to a vehicle air conditioner. Background technique [0004] Conventionally, there is a vehicle air conditioner described in Patent Document 1. The vehicle air conditioner described in Patent Document 1 includes a filter disposed between the blower and the air inlet, and a pressure sensor disposed in the space between the blower and the filter. The pressure sensor detects the pressure in the space between the blower and the filter. In addition, the vehicle air conditioner described in Patent Document 1 includes a detection device that detects the clogging degree of the filter based on the pressure detected by the pressure se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H3/06B01D46/42F24F11/62
CPCB01D46/44B01D2279/50B60H3/0616B60H2003/0683F24F11/63F24F11/39F24F2110/64Y02B30/70Y02A50/2351
Inventor 福永博之石山尚敬
Owner DENSO CORP
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