NAVIGATION DEVICE

To provide a navigation device that suggests parking lots enabling reduction in energy consumption to be used in passenger-compartment air conditioning.SOLUTION: A navigation device 1 comprises: a location detection device 3 that detects a current location of an own vehicle; and a computation device 2 that has route guidance means guiding a recommendation route from the detected current location to a set destination. The computation device has: parking lot retrieval means that retrieves parking lots around the destination; and heat-reception amount estimation means that estimates a heat-reception amount that a passenger compartment receives while parking. The heat-reception amount means is configured to: estimate a heat-reception amount which is received in the passenger compartment while parking from energy to be accumulated in the passenger compartment by a solar radiation load the passenger compartment receives, and energy entering into/outgoing from the passenger compartment by a temperature difference between an environment temperature of the parking lot and a set passenger compartment temperature; and output the estimated heat-reception amount for each parking lot retrieved by the parking lot retrieval means. Therefore, there can be provided the navigation device that suggests the parking lots enabling reduction in energy consumption to be used in passenger-compartment air conditioning.SELECTED DRAWING: Figure 1 【課題】車内空調に使用する消費エネルギーを低減できる駐車場を提示するナビゲーション装置を提供する。【解決手段】ナビゲーション装置１は、自車の現在地を検出する位置検出装置３と、検出された現在位置から設定された目的地までの推奨経路を案内する経路案内手段を有する演算装置２と、を備える。そして、演算装置が、目的地周辺の駐車場を検索する駐車場検索手段と、駐車中に車室が受ける受熱量を推定する受熱量推定手段と、を有し、受熱量推定手段が、車室が受ける日射負荷により車室に蓄積されるエネルギーと、駐車場の環境温度と設定された車内温度との温度差による車室に出入りするエネルギーとから、駐車中に車室が受ける受熱量を推定し、駐車場検索手段が検索した各駐車場について、推定した受熱量を出力することとしたため、車内空調に使用する消費エネルギーを低減可能な駐車場を提示するナビゲーション装置を提供できる。【選択図】図１