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JP7561556B2 - Vehicle heating device - Google Patents
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JP7561556B2 - Vehicle heating device - Google Patents

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JP7561556B2
JP7561556B2 JP2020161563A JP2020161563A JP7561556B2 JP 7561556 B2 JP7561556 B2 JP 7561556B2 JP 2020161563 A JP2020161563 A JP 2020161563A JP 2020161563 A JP2020161563 A JP 2020161563A JP 7561556 B2 JP7561556 B2 JP 7561556B2
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heat storage
heat
initialization
heating
storage material
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和輝 牧野
至 瀬田
洋祐 大伴
広行 鈴木
正樹 小室
孝史 河野
晋也 佐川
雅和 吉野
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Subaru Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、車両の加温装置に関する。 The present invention relates to a vehicle heating device.

発熱誘導操作を行うことで一定量の熱を発することができ、さらに、発熱した後に再度熱を加えることで、再び発熱可能な状態に初期化できる蓄熱器がある。このような蓄熱器としては、相変化に伴って潜熱を放出する潜熱蓄熱材を用いた蓄熱器、あるいは、物質の可逆的な化学反応により熱を放出する化学蓄熱材を用いた蓄熱器がある。 There are heat storage devices that can generate a certain amount of heat by performing a heat induction operation, and can be initialized to a state where they can generate heat again by applying heat again after generating heat. Examples of such heat storage devices include heat storage devices that use latent heat storage materials that release latent heat with a phase change, and heat storage devices that use chemical heat storage materials that release heat through reversible chemical reactions of substances.

特許文献1には、潜熱蓄熱材を用いて機器の暖機を行う車両が示されている。さらに、特許文献1には、潜熱蓄熱材の光の透過率、内圧、電気抵抗、又は流動抵抗から、蓄熱材が液相状態か固相状態かを識別することが示されている。 Patent Document 1 shows a vehicle that uses a latent heat storage material to warm up the equipment. Furthermore, Patent Document 1 shows that it is possible to distinguish whether the latent heat storage material is in a liquid or solid phase state based on the light transmittance, internal pressure, electrical resistance, or flow resistance of the latent heat storage material.

特開2010-144636号公報JP 2010-144636 A

上記の蓄熱材は、初期化が不完全であると、その後に、遷移が進み、勝手に熱を放出してしまうという課題が生じる。また、初期化が不完全なときには、蓄熱材の一部にのみ不完全な状態が現れることが多い。したがって、特許文献1に示されるような液相状態と固相状態とを識別する方法では、不完全な初期化を判定することは難しい。 If the above heat storage material is not fully initialized, the transition will continue and the material will release heat on its own. In addition, when the initialization is incomplete, the incomplete state often appears only in a part of the heat storage material. Therefore, it is difficult to determine whether the initialization is incomplete using the method of distinguishing between the liquid phase and the solid phase as shown in Patent Document 1.

本発明は、車両に搭載される加温装置において、蓄熱器の不完全な初期化を抑制することを目的とする。 The present invention aims to prevent incomplete initialization of a heat storage device in a heating device installed in a vehicle.

請求項1記載の発明は、
加温対象機器を有する車両に搭載される車両の加温装置であって、
発熱後の状態から発熱可能な状態へ初期化可能な蓄熱材を含み、前記加温対象機器を加温するために発熱する蓄熱器と、
前記蓄熱器を初期化させる初期化処理を実行する初期化制御部と、
を備え、
前記初期化処理は、前記初期化のために前記蓄熱器を加熱する加熱処理を含み、
前記初期化処理において、前記初期化制御部は、前記加熱処理を、終了条件を満たすまで継続し、前記終了条件を満たした後、所定期間における前記蓄熱材の電気抵抗の変化量が閾値以下であれば、前記初期化処理を終了する一方、前記電気抵抗の変化量が閾値を越えたら、再度、前記加熱処理を実行することを特徴とする。
The invention described in claim 1 is
A vehicle heating device mounted on a vehicle having a heating target device,
A heat storage device that includes a heat storage material that can be initialized from a state after heat generation to a state capable of generating heat, and generates heat to heat the heating target device;
An initialization control unit that executes an initialization process to initialize the heat accumulator ;
Equipped with
the initialization process includes a heating process of heating the heat accumulator for the initialization process,
In the initialization process, the initialization control unit continues the heating process until a termination condition is satisfied, and after the termination condition is satisfied, if the amount of change in the electrical resistance of the heat storage material over a predetermined period of time is below a threshold value, terminates the initialization process, while if the amount of change in the electrical resistance exceeds the threshold value, performs the heating process again .

請求項記載の発明は、請求項記載の車両の加温装置において、
前記終了条件には、前記蓄熱材の温度が温度閾値以上、熱の供給時間が時間閾値以上、及び、前記蓄熱材の抵抗が抵抗閾値以上という条件のうち、2つ以上の条件が含まれ、
前記初期化制御部は、前記2つ以上の条件の全てが満たされた場合に前記終了条件が満たされたと判定することを特徴とする。
The invention according to claim 2 provides the vehicle heating device according to claim 1 ,
The termination condition includes two or more of the following conditions: the temperature of the heat storage material is equal to or greater than a temperature threshold value; the heat supply time is equal to or greater than a time threshold value; and the resistance of the heat storage material is equal to or greater than a resistance threshold value.
The initialization control unit determines that the termination condition is satisfied when all of the two or more conditions are satisfied.

請求項記載の発明は、
加温対象機器を有する車両に搭載される車両の加温装置であって、
発熱後の固相状態から発熱可能な液相状態へ初期化可能な蓄熱材を含み、前記加温対象機器を加温するために発熱する蓄熱器と、
前記蓄熱器を初期化させる初期化処理を実行する初期化制御部と、
前記蓄熱材の液面を検出する液面センサと、
を備え、
前記初期化処理は、前記初期化のために前記蓄熱器を加熱する加熱処理を含み、
前記初期化処理において、前記初期化制御部は、前記液面センサが検出した前記液面の揺れの状態に基づいて前記初期化処理を終了することを特徴とする。
The invention described in claim 3 is
A vehicle heating device mounted on a vehicle having a heating target device,
A heat storage device that includes a heat storage material that can be initialized from a solid phase state after heat generation to a liquid phase state capable of generating heat, and generates heat to heat the heating target device;
An initialization control unit that executes an initialization process to initialize the heat accumulator ;
A liquid level sensor for detecting the liquid level of the heat storage material;
Equipped with
the initialization process includes a heating process of heating the heat accumulator for the initialization process,
In the initialization process, the initialization control unit terminates the initialization process based on a state of swaying of the liquid level detected by the liquid level sensor.

初期化可能な蓄熱材は、初期化が不完全であると、その後、不完全な部分が徐々に拡大する。また、固相状態から液相状態へ初期化可能な蓄熱材では、蓄熱材が完全に初期化されている場合と一部に不完全な部分がある場合とで、蓄熱材の液面の揺れに比較的に大きな違いが現れる。さらに、蓄熱材を初期化する際には、蓄熱材は周囲から加熱されるため、蓄熱材の中央部位の温度が一定以上であれば、初期化が完全に行われていると高い確度で見なすことができる。本発明によれば、蓄熱材の抵抗の変化により初期化の判定を行うことで、初期化が不完全な部分が徐々に拡大していないか識別した上で、正確な判定結果が得られる。また、本発明によれば、蓄熱材の液面の揺れの検出、あるいは、蓄熱材の中央部位の温度の検出により、正確に蓄熱材の初期化の判定を行うことができる。 When the initialization of a heat storage material that can be initialized is incomplete, the incomplete portion gradually expands. In addition, in a heat storage material that can be initialized from a solid phase state to a liquid phase state, a relatively large difference appears in the swaying of the liquid surface of the heat storage material between when the heat storage material is completely initialized and when there are some incomplete portions. Furthermore, when the heat storage material is initialized, the heat storage material is heated from the surroundings, so if the temperature of the central portion of the heat storage material is equal to or higher than a certain level, it can be considered with a high degree of certainty that the initialization has been completed. According to the present invention, by determining whether the initialization has been completed based on the change in the resistance of the heat storage material, it is possible to identify whether the incompletely initialized portion is gradually expanding, and obtain an accurate determination result. Furthermore, according to the present invention, the initialization of the heat storage material can be accurately determined by detecting the swaying of the liquid surface of the heat storage material or detecting the temperature of the central portion of the heat storage material.

本発明の実施形態1の加温装置を搭載した車両を示すブロック図である。1 is a block diagram showing a vehicle equipped with a heating device according to a first embodiment of the present invention. 通常走行時(A)と走行用バッテリの加温時(B)と蓄熱器の初期化時(C)の第1冷却液回路及び第2冷却液回路の状態を示す図である。5A and 5B are diagrams showing the states of the first coolant circuit and the second coolant circuit during normal driving (A), when the driving battery is being heated (B), and when the heat accumulator is being initialized (C). 実施形態1の初期化制御部により実行される初期化処理を示すフローチャートである。5 is a flowchart showing an initialization process executed by an initialization control unit according to the first embodiment. 初期化処理中の蓄熱器の状態を示すタイムチャートである。5 is a time chart showing a state of a heat accumulator during an initialization process. 本発明の実施形態2の加温装置を搭載した車両を示すブロック図である。FIG. 11 is a block diagram showing a vehicle equipped with a heating device according to a second embodiment of the present invention. 実施形態4の車両に設けられた温度センサを示す図である。FIG. 13 is a diagram showing a temperature sensor provided in a vehicle of a fourth embodiment.

以下、本発明の各実施形態について図面を参照して詳細に説明する。 Each embodiment of the present invention will be described in detail below with reference to the drawings.

(実施形態1)
図1は、本発明の実施形態1の加温装置を搭載した車両を示すブロック図である。実施形態1に係る車両1は、EV(Electric Vehicle)であり、走行モータ12の動力によって走行する。車両1は、駆動輪11と、駆動輪11に動力を出力する走行モータ12と、走行モータ12を駆動すPCU(Power Control Unit)13と、走行モータ12に走行用の電力を供給する走行用バッテリ14と、運転者の操作を受ける運転操作部17と、を備える。
(Embodiment 1)
1 is a block diagram showing a vehicle equipped with a heating device according to a first embodiment of the present invention. The vehicle 1 according to the first embodiment is an EV (Electric Vehicle) and runs on the power of a travel motor 12. The vehicle 1 includes drive wheels 11, a travel motor 12 that outputs power to the drive wheels 11, a PCU (Power Control Unit) 13 that drives the travel motor 12, a travel battery 14 that supplies power for running to the travel motor 12, and a driving operation unit 17 that receives operation by a driver.

走行用バッテリ14は、例えばリチウムイオン二次電池、ニッケル水素二次電池などの二次電池であり、低温時に充放電の能力が低下する。PCU13は、走行モータ12を駆動するインバータを含み、走行モータ12を力行運転又は回生運転する。PCU13は、走行モータ12を駆動する際に発熱する。運転操作部17は、アクセル操作部及び制動操作部を含み、アクセル操作量及び制動操作量を示す信号を走行制御部43に出力する。走行制御部43は、アクセル操作量及び制動操作量に応じてPCU13のインバータを駆動する。インバータの駆動により、走行モータ12から駆動輪11へ走行トルク又は制動トルクが出力され、運転操作に応じて車両1が走行又は制動する。 The driving battery 14 is a secondary battery such as a lithium-ion secondary battery or a nickel-metal hydride secondary battery, and its charging and discharging capabilities decrease at low temperatures. The PCU 13 includes an inverter that drives the driving motor 12, and drives the driving motor 12 in power running or regenerative running. The PCU 13 generates heat when driving the driving motor 12. The driving operation unit 17 includes an accelerator operation unit and a brake operation unit, and outputs signals indicating the accelerator operation amount and the brake operation amount to the driving control unit 43. The driving control unit 43 drives the inverter of the PCU 13 according to the accelerator operation amount and the brake operation amount. Driving the inverter outputs a driving torque or a braking torque from the driving motor 12 to the drive wheels 11, and the vehicle 1 runs or brakes according to the driving operation.

車両1は、さらに、PCU13を冷却する第1冷却液回路51と、走行用バッテリ14を冷却又は加温する第2冷却液回路52と、第1冷却液回路51と第2冷却液回路52との間で熱を交換する熱交換器55とを備える。PCU13は冷却液を通す通路を有し、この通路に第1冷却液回路51の冷却液が流れる。走行用バッテリ14は冷却液を通す通路を有し、この通路に第2冷却液回路52の冷却液が流れる。 The vehicle 1 further includes a first coolant circuit 51 that cools the PCU 13, a second coolant circuit 52 that cools or heats the driving battery 14, and a heat exchanger 55 that exchanges heat between the first coolant circuit 51 and the second coolant circuit 52. The PCU 13 has a passage through which coolant flows, and the coolant from the first coolant circuit 51 flows through this passage. The driving battery 14 has a passage through which coolant flows, and the coolant from the second coolant circuit 52 flows through this passage.

第1冷却液回路51は、冷却液の熱を外気に放出するラジエータ16と、冷却液を加熱する蓄熱器31と、冷却液を流すポンプP1と、冷却液が流れる経路を切り替え可能な分岐路53、54及び三方弁V1~V4とを備える。第2冷却液回路52は、冷却液を流すポンプP2を備える。 The first coolant circuit 51 includes a radiator 16 that releases heat from the coolant to the outside air, a heat accumulator 31 that heats the coolant, a pump P1 that circulates the coolant, and branch paths 53, 54 and three-way valves V1 to V4 that can switch the path through which the coolant flows. The second coolant circuit 52 includes a pump P2 that circulates the coolant.

分岐路53と三方弁V1、V2は、第1冷却液回路51の経路を、ラジエータ16を通る経路と通らない経路とに切り替えることができる。分岐路54と三方弁V3、V4は、第1冷却液回路51の経路を、蓄熱器31及び熱交換器55を通る経路と通らない経路とに切り替えることができる。 The branch line 53 and the three-way valves V1 and V2 can switch the path of the first coolant circuit 51 between a path that passes through the radiator 16 and a path that does not. The branch line 54 and the three-way valves V3 and V4 can switch the path of the first coolant circuit 51 between a path that passes through the heat accumulator 31 and the heat exchanger 55 and a path that does not.

蓄熱器31は、蓄熱材(例えば潜熱蓄熱材)を含み、初期化された状態において発熱誘導がなされることで一定量の熱を発し、発熱後の状態において、再度加熱されることで発熱可能な状態に初期化される。蓄熱器31は冷却液を蓄熱材の周囲に通す通路を有する。 The heat storage device 31 contains a heat storage material (e.g., a latent heat storage material), and when in an initialized state, generates a certain amount of heat by heat induction, and after heat generation, is initialized to a state in which it can generate heat by being heated again. The heat storage device 31 has a passageway that passes a cooling liquid around the heat storage material.

車両1は、さらに、蓄熱器31を発熱させる発熱誘導器32と、蓄熱器31に含まれる蓄熱材の2点間の電気抵抗を計測する抵抗センサ31rと、蓄熱器31の温度を計測する温度センサ31tと、システム制御部42及び初期化制御部41とを備える。これらの構成要素及び蓄熱器31が実施形態1の加温装置30を構成する。 The vehicle 1 further includes a heat generating inductor 32 that causes the heat storage device 31 to generate heat, a resistance sensor 31r that measures the electrical resistance between two points of the heat storage material contained in the heat storage device 31, a temperature sensor 31t that measures the temperature of the heat storage device 31, a system control unit 42, and an initialization control unit 41. These components and the heat storage device 31 constitute the heating device 30 of the first embodiment.

発熱誘導器32は、初期化された蓄熱器31に作用し、蓄熱器31の発熱を誘導する。特に限定されないが、発熱誘導器32はアクチュエータを有し、アクチュエータの駆動により蓄熱器31に物理的な刺激を与えて、蓄熱器31の発熱を誘導する。 The heat generation inducer 32 acts on the initialized heat storage device 31 to induce heat generation in the heat storage device 31. Although not particularly limited, the heat generation inducer 32 has an actuator, and the actuator is driven to apply a physical stimulus to the heat storage device 31, thereby inducing heat generation in the heat storage device 31.

システム制御部42及び初期化制御部41は、1つのECU(Electronic Control Unit)又は通信を介して連携して動作する複数のECUから構成される。システム制御部42は、発熱誘導器32、第1冷却液回路51の三方弁V1~V4、並びに、第2冷却液回路52のポンプP2を制御する。初期化制御部41は、システム制御部42と連携して蓄熱器31を初期化する制御を行う。抵抗センサ31r及び温度センサ31tの出力は、初期化制御部41へ送られる。 The system control unit 42 and the initialization control unit 41 are composed of one ECU (Electronic Control Unit) or multiple ECUs that operate in cooperation via communication. The system control unit 42 controls the heat generation inducer 32, the three-way valves V1 to V4 of the first coolant circuit 51, and the pump P2 of the second coolant circuit 52. The initialization control unit 41 cooperates with the system control unit 42 to control the initialization of the heat accumulator 31. The outputs of the resistance sensor 31r and the temperature sensor 31t are sent to the initialization control unit 41.

<冷却液回路の切り替え>
図2は、通常走行時(A)、走行用バッテリの加温時(B)及び蓄熱器の初期化時(C)の第1冷却液回路及び第2冷却液回路の状態を示す図である。
<Coolant circuit switching>
FIG. 2 is a diagram showing the states of the first coolant circuit and the second coolant circuit during normal driving (A), when the driving battery is being heated (B), and when the heat accumulator is being initialized (C).

車両1の通常走行時、第1冷却液回路51は、図2(A)に示すように、ラジエータ16とPCU13との間で冷却液が流れるように三方弁V1~V4が切り替えられる。このような切り替えにより、PCU13の熱が冷却液を介してラジエータ16から放射され、PCU13が冷却される。 When the vehicle 1 is running normally, the three-way valves V1 to V4 in the first coolant circuit 51 are switched so that coolant flows between the radiator 16 and the PCU 13, as shown in FIG. 2(A). This switching causes heat from the PCU 13 to be radiated from the radiator 16 via the coolant, cooling the PCU 13.

走行用バッテリ14を加温するとき、第1冷却液回路51は、図2(B)に示すように、ラジエータ16を介さずに、PCU13、蓄熱器31及び熱交換器55の間で冷却液が流れるように三方弁V1~V4が切り替えられる。さらに、ポンプP2が駆動され、発熱誘導器32が動作する。蓄熱器31が発熱すると、蓄熱器31の熱が、第1冷却液回路51の冷却液、熱交換器55、第2冷却液回路52の冷却液を介して走行用バッテリ14に送られ、走行用バッテリ14が加温される。 When the driving battery 14 is heated, the three-way valves V1 to V4 of the first coolant circuit 51 are switched so that the coolant flows between the PCU 13, the heat storage device 31, and the heat exchanger 55 without passing through the radiator 16, as shown in FIG. 2(B). In addition, the pump P2 is driven and the heat generating inducer 32 operates. When the heat storage device 31 generates heat, the heat of the heat storage device 31 is sent to the driving battery 14 via the coolant of the first coolant circuit 51, the heat exchanger 55, and the coolant of the second coolant circuit 52, and the driving battery 14 is heated.

発熱後の蓄熱器31を加熱して初期化するとき、第1冷却液回路51は、図2(C)に示すように、ラジエータ16を介さずに、PCU13、蓄熱器31及び熱交換器55の間で冷却液が流れるように三方弁V1~V4が切り替えられる。さらに、ポンプP2が停止される。上記の切り替えにより、PCU13の熱が第1冷却液回路51の冷却液に蓄積され、冷却液の温度が蓄熱器31の初期化に必要な温度を越える。そして、高温の冷却液が蓄熱器31を加熱し、蓄熱器31が初期化される。 When the heat storage device 31 is heated and initialized after heat generation, the three-way valves V1 to V4 of the first coolant circuit 51 are switched so that the coolant flows between the PCU 13, the heat storage device 31, and the heat exchanger 55 without passing through the radiator 16, as shown in FIG. 2(C). In addition, the pump P2 is stopped. With the above switching, the heat of the PCU 13 is accumulated in the coolant of the first coolant circuit 51, and the temperature of the coolant exceeds the temperature required to initialize the heat storage device 31. The high-temperature coolant then heats the heat storage device 31, and the heat storage device 31 is initialized.

システム制御部42は、各部の温度、並びに、蓄熱器31の状態等に応じて、第1冷却液回路51、第2冷却液回路52及び発熱誘導器32を制御する。 The system control unit 42 controls the first coolant circuit 51, the second coolant circuit 52, and the heat generation inductor 32 according to the temperature of each part and the state of the heat storage unit 31, etc.

<初期化処理>
図3は、実施形態1の初期化制御部により実行される初期化処理を示すフローチャートである。
<Initialization process>
FIG. 3 is a flowchart showing the initialization process executed by the initialization control unit according to the first embodiment.

初期化制御部41は、蓄熱器31が発熱した後、所定の条件に基づいて図3の初期化処理を開始する。初期化処理が開始されると、まず、初期化制御部41は、システム制御部42に三方弁V1~V4を制御させ、図2(C)の冷却液の流れに切り替える(ステップS1)。次に、初期化制御部41は、冷却液の温度が目標温度に達するのを待機する(ステップS2)。目標温度は、蓄熱器31を加熱する温度であり、目標温度に達したら蓄熱器31の加熱処理が開始される。その後、初期化制御部41は、加熱処理の継続時間の計数を開始する(ステップS3)。 After the heat storage device 31 generates heat, the initialization control unit 41 starts the initialization process of FIG. 3 based on predetermined conditions. When the initialization process starts, the initialization control unit 41 first causes the system control unit 42 to control the three-way valves V1 to V4 to switch to the flow of the coolant of FIG. 2 (C) (step S1). Next, the initialization control unit 41 waits for the temperature of the coolant to reach a target temperature (step S2). The target temperature is the temperature at which the heat storage device 31 is heated, and when the target temperature is reached, the heating process of the heat storage device 31 starts. After that, the initialization control unit 41 starts counting the duration of the heating process (step S3).

加熱処理が開始されると、初期化制御部41は、加熱処理の終了条件を監視するループ処理(ステップS4~S6)へ、処理を移行する。ループ処理において、初期化制御部41は、蓄熱器31の温度が温度閾値を越えたか(ステップS4)、蓄熱器31の抵抗が抵抗閾値を下回ったか(ステップS5)、加熱処理の継続時間が時間閾値を越えたか(ステップS6)をそれぞれ判定し、ステップS4~S6のいずれかがNOであれば、これらの判定処理を繰り返す。 When the heating process is started, the initialization control unit 41 transitions to a loop process (steps S4 to S6) in which the end conditions of the heating process are monitored. In the loop process, the initialization control unit 41 determines whether the temperature of the heat storage device 31 has exceeded a temperature threshold value (step S4), whether the resistance of the heat storage device 31 has fallen below a resistance threshold value (step S5), and whether the duration of the heating process has exceeded a time threshold value (step S6), and if any of steps S4 to S6 is NO, these determination processes are repeated.

上記のループ処理において、ステップS4~S6の全てがYESと判定されると、初期化制御部41は、システム制御部42に三方弁V1~V4を制御させ、第1冷却液回路51を図1の冷却液の流れに切り替える(ステップS7)。この切替えにより、冷却液の温度が低下し、蓄熱器31の加熱処理が終了する。 In the above loop process, if all of steps S4 to S6 are judged as YES, the initialization control unit 41 causes the system control unit 42 to control the three-way valves V1 to V4 to switch the first coolant circuit 51 to the coolant flow shown in FIG. 1 (step S7). This switching reduces the temperature of the coolant, and the heating process of the heat storage unit 31 ends.

加熱処理が終了すると、初期化制御部41は、所定期間、抵抗センサ31rの出力(蓄熱材の電気抵抗)を監視し(ステップS8)、所定期間の抵抗値の変動量が閾値以内か判定する(ステップS9)。その結果、抵抗値の変動量が閾値を越えていれば、初期化が未完全であると判断し、初期化制御部41は、処理をステップS1に戻す。そして、初期化制御部41は、再度、蓄熱器31の加熱処理を繰り返す。なお、初期化制御部41は、加熱処理の繰り返し回数を計数し、繰り返し回数を制限するようにしてもよい。また、再度の加熱処理の際は、ステップS6の時間閾値を小さい値に変更してもよい。 When the heating process is completed, the initialization control unit 41 monitors the output of the resistance sensor 31r (electrical resistance of the heat storage material) for a predetermined period (step S8) and determines whether the amount of change in the resistance value during the predetermined period is within a threshold value (step S9). If the amount of change in the resistance value exceeds the threshold value, the initialization control unit 41 determines that the initialization is incomplete, and returns the process to step S1. The initialization control unit 41 then repeats the heating process of the heat storage unit 31 again. Note that the initialization control unit 41 may count the number of times the heating process is repeated and limit the number of times it is repeated. Also, when the heating process is repeated again, the time threshold value of step S6 may be changed to a smaller value.

一方、ステップS9の判定の結果、閾値以内であれば、初期化制御部41は初期化完了と判断して、初期化処理を終了する。 On the other hand, if the result of the judgment in step S9 is within the threshold, the initialization control unit 41 determines that the initialization is complete and ends the initialization process.

図4は、初期化処理中の蓄熱器の状態の一例を示すタイムチャートである。図4の例は、タイミングt0から加熱処理J1が開始され、タイミングt1、t2、t3で、それぞれ、温度が温度閾値を上回り、抵抗が抵抗閾値を下回り、経過時間が時間閾値に達することで、1回目の加熱処理J1が完了している。その後、所定期間T1の抵抗値の変動量ΔRが閾値Xを上回ったため、初期化不完全と判断され、再度の加熱処理J2が行われている。そして、2回目の加熱処理J2の後、所定期間T1の抵抗値の変動量ΔRが閾値X以下となり、初期化が完了している。 Figure 4 is a time chart showing an example of the state of the heat storage device during initialization processing. In the example of Figure 4, heating processing J1 is started at timing t0, and at timings t1, t2, and t3, the temperature exceeds the temperature threshold, the resistance falls below the resistance threshold, and the elapsed time reaches the time threshold, respectively, completing the first heating processing J1. Thereafter, the amount of change ΔR in the resistance value during the specified period T1 exceeds the threshold X, so it is determined that initialization is incomplete, and another heating processing J2 is performed. Then, after the second heating processing J2, the amount of change ΔR in the resistance value during the specified period T1 becomes equal to or less than the threshold X, and initialization is completed.

以上のように、実施形態1の加温装置30によれば、蓄熱器31の加熱処理の後、初期化制御部41は、蓄熱材の電気抵抗の変化に基づいて、初期化が完了したか否かを判定する。蓄熱材に初期化が不完全な部分が残っていても、不完全な部分は小さいことが多いため、その時点の蓄熱材の温度又は抵抗値から、不完全な部分を有することを識別することは困難である。しかし、初期化が不完全な部分は時間の経過に伴って僅かに拡大していくので、不完全な部分の拡大に起因する抵抗値の変化から、不完全な部分を有することを正確に識別できる。したがって、上記の判定方法により、初期化の完了を正確に判定できる。 As described above, according to the heating device 30 of the first embodiment, after the heat storage unit 31 is heated, the initialization control unit 41 determines whether the initialization is complete based on the change in the electrical resistance of the heat storage material. Even if the heat storage material has incompletely initialized parts, the incomplete parts are often small, and it is difficult to identify that there are incomplete parts from the temperature or resistance value of the heat storage material at that time. However, since the incompletely initialized parts expand slightly over time, it is possible to accurately identify that there are incomplete parts from the change in resistance value caused by the expansion of the incomplete parts. Therefore, the above-mentioned determination method makes it possible to accurately determine the completion of initialization.

また、蓄熱器31の初期化処理において、仮に、前回の加熱処理で不完全に初期化された蓄熱器31がそのまま放置されると、蓄熱器31の遷移が徐々に進んでしまい、前回の加熱処理が無駄になってしまう。しかし、実施形態1の加温装置30によれば、初期化制御部41は、初期化が不完全と判定した場合に、再び、蓄熱器31を加熱処理する。前回の加熱処理に引き続き、次の加熱処理が行われることで、前回の加熱処理を無駄にせずに、蓄熱器31の完全な初期化を図ることができる。また、初期化が不完全か否かの判定は、所定期間T1に行われるので、前回の加熱処理から次の加熱処理までの時間バラツキが少なく、常に、前回の加熱処理を有効に活用して、次の加熱処理で蓄熱器31の完全な初期化を図ることができる。 In addition, in the initialization process of the heat storage device 31, if the heat storage device 31 that was incompletely initialized in the previous heating process is left as it is, the transition of the heat storage device 31 will gradually progress, and the previous heating process will be wasted. However, according to the heating device 30 of the first embodiment, when the initialization control unit 41 determines that the initialization is incomplete, it heats the heat storage device 31 again. By performing the next heating process following the previous heating process, it is possible to completely initialize the heat storage device 31 without wasting the previous heating process. In addition, since the determination of whether the initialization is incomplete is performed during the specified period T1, there is little variation in the time from the previous heating process to the next heating process, and the previous heating process can always be effectively utilized to completely initialize the heat storage device 31 in the next heating process.

さらに、実施形態1の加温装置30によれば、蓄熱器31の加熱処理を終了する条件に、蓄熱器31の温度、蓄熱材の電気抵抗、加熱処理の継続時間がそれぞれ閾値を越えるという条件が含まれる。上記の複数の条件により加熱処理の終了を判定することで、加熱量のバラツキが生じやすい冷却液を用いた加熱処理であっても、蓄熱器31をほぼ初期化する状態まで高い確度で加熱できる。なお、上記の3つの条件のうち、2つの条件を加熱処理の終了を判別する条件とした場合でも、蓄熱器31をほぼ初期化する状態まで高い確度で加熱することができる。 Furthermore, according to the heating device 30 of embodiment 1, the conditions for terminating the heating process of the heat storage device 31 include the conditions that the temperature of the heat storage device 31, the electrical resistance of the heat storage material, and the duration of the heating process each exceed a threshold value. By determining the end of the heating process based on the above multiple conditions, the heat storage device 31 can be heated with high accuracy to a state where it is almost initialized, even in the case of a heating process using a cooling liquid that is prone to variations in the amount of heat. Note that even if two of the above three conditions are used as conditions for determining the end of the heating process, the heat storage device 31 can be heated with high accuracy to a state where it is almost initialized.

(実施形態2)
図5は、実施形態2の加温装置を搭載した車両を示すブロック図である。実施形態2の加温装置は、蓄熱器31の初期化完了の判定手段が実施形態1と異なり、その他は実施形態1と同様である。
(Embodiment 2)
5 is a block diagram showing a vehicle equipped with a heating device of embodiment 2. The heating device of embodiment 2 is different from embodiment 1 in the means for determining completion of initialization of the heat storage device 31, but is otherwise similar to embodiment 1.

実施形態2の蓄熱器31には、内部に初期化の完了を判定するための内部センサ33sが設けられている。実施形態2において、内部センサ33sは液面センサである。蓄熱器31は、固相状態と液相状態とに相変化する蓄熱材を収容する空間を有し、内部センサ33sは空間に収容された蓄熱材の液面の動きを検知する。詳細には、内部センサ33sは、液面に浮かぶフロートと、フロートの位置を検出するセンサとを備える。あるいは、内部センサ33sは、光の照射と反射光の検出で液面の変動を検出する構成としてもよい。内部センサ33sは、検出出力を初期化制御部41に送る。 The heat storage device 31 of the second embodiment is provided with an internal sensor 33s for determining the completion of initialization. In the second embodiment, the internal sensor 33s is a liquid level sensor. The heat storage device 31 has a space for accommodating a heat storage material that changes between a solid phase and a liquid phase, and the internal sensor 33s detects the movement of the liquid level of the heat storage material accommodated in the space. In detail, the internal sensor 33s includes a float that floats on the liquid surface and a sensor that detects the position of the float. Alternatively, the internal sensor 33s may be configured to detect fluctuations in the liquid level by irradiating light and detecting reflected light. The internal sensor 33s sends a detection output to the initialization control unit 41.

車両1の走行振動を受けて、液相の蓄熱材は液面が揺れ動く。さらに、蓄熱材の全体が液相となった状態と、一部に固相の部分が含まれる状態とでは、液面の揺れ動きの周波数に違いが生じるなど、振動の状態に識別可能な違いが現れる。したがって、内部センサ33sが検出した蓄熱材の液面の揺れの状態から、初期化制御部41は、蓄熱材が完全に初期化されたか、不十分な初期化であるか判定できる。 When subjected to vibrations caused by the running of the vehicle 1, the liquid surface of the heat storage material in liquid phase wobbles. Furthermore, there is a discernible difference in the state of vibration, such as a difference in the frequency of the wobbles of the liquid surface, between a state in which the entire heat storage material is in liquid phase and a state in which some parts are in solid phase. Therefore, based on the state of the wobbles of the liquid surface of the heat storage material detected by the internal sensor 33s, the initialization control unit 41 can determine whether the heat storage material has been fully initialized or has been insufficiently initialized.

実施形態2の初期化制御部41は、図3に示した初期化処理と同様の処理により蓄熱器31の初期化を行う。ただし、実施形態2の初期化処理では、ステップS8、S9の初期化の判定ステップの替わりに、初期化制御部41は、内部センサ33sの出力に基づき蓄熱材の液面の揺れの状態から、初期化が完了したか否かを判定する。詳細には、初期化制御部41は、蓄熱材の液面の揺れの周波数を所定期間計算し、その平均値が液相を示す閾値より長いか否かで初期化の完了か否かを判定する。あるいは、初期化制御部41は、車両の振動を示す加速度センサの出力と、内部センサ33sの出力とに基づいて、車両の振動の大きさが異なる場合でも比較可能なように、蓄熱材の液面の揺れの大きさ規格化し、規格化された液面の揺れの大きさを閾値と比較することで、初期化の完了か否かを判定する。 The initialization control unit 41 of the second embodiment initializes the heat storage unit 31 by a process similar to the initialization process shown in FIG. 3. However, in the initialization process of the second embodiment, instead of the initialization determination steps of steps S8 and S9, the initialization control unit 41 determines whether the initialization is complete from the state of the swaying of the liquid surface of the heat storage material based on the output of the internal sensor 33s. In detail, the initialization control unit 41 calculates the frequency of the swaying of the liquid surface of the heat storage material for a predetermined period, and determines whether the initialization is complete based on whether the average value is longer than a threshold value indicating the liquid phase. Alternatively, the initialization control unit 41 standardizes the magnitude of the swaying of the liquid surface of the heat storage material based on the output of the acceleration sensor indicating the vibration of the vehicle and the output of the internal sensor 33s so that comparison is possible even when the magnitude of the vibration of the vehicle is different, and determines whether the initialization is complete by comparing the normalized magnitude of the swaying of the liquid surface with a threshold value.

以上のように、実施形態2の加温装置30によれば、初期化制御部41は、内部センサ(液面センサ)33sの出力に基づいて、蓄熱材が完全に初期化されたか否かを判定する。蓄熱材に初期化が不完全な部分が残っていることは、その時点の蓄熱材の温度又は抵抗値からは識別が困難である。しかし、前述の通り、蓄熱材の液面の揺れの状態からは不完全な初期化を比較的に正確に識別することができる。したがって、上記の判定方法により、初期化の完了を正確に判定できる。 As described above, according to the heating device 30 of the second embodiment, the initialization control unit 41 determines whether or not the heat storage material has been completely initialized based on the output of the internal sensor (liquid level sensor) 33s. It is difficult to identify whether there are any incompletely initialized parts of the heat storage material from the temperature or resistance value of the heat storage material at that time. However, as described above, it is possible to relatively accurately identify incomplete initialization from the state of fluctuation of the liquid level of the heat storage material. Therefore, the above determination method makes it possible to accurately determine whether initialization has been completed.

(実施形態3)
実施形態3の加温装置は、実施形態2の内部センサ33sとして、蓄熱材の中央部位に検知子が位置する中央温度センサが適用されている。蓄熱器31は、固相状態と液相状態とに相変化する蓄熱材を収容する空間を有し、内部センサ33sの検知子は、上記空間内に位置する。検知子とは、温度を検知する部分を意味し、サーミスタを用いた温度センサであれば、検知子はサーミスタの部分に相当し、熱電対を用いた温度センサであれば、検知子は一方の金属線の先端部分に相当する。内部センサ33sは、検出出力を初期化制御部41に送る。
(Embodiment 3)
In the heating device of the third embodiment, a central temperature sensor with a detector located at the center of the heat storage material is applied as the internal sensor 33s of the second embodiment. The heat storage device 31 has a space for accommodating the heat storage material that changes between a solid phase and a liquid phase, and the detector of the internal sensor 33s is located in the space. The detector means a part that detects temperature. In the case of a temperature sensor using a thermistor, the detector corresponds to the thermistor, and in the case of a temperature sensor using a thermocouple, the detector corresponds to the tip of one of the metal wires. The internal sensor 33s sends a detection output to the initialization control unit 41.

蓄熱器31を初期化する際、蓄熱器31に含まれる蓄熱材は周囲から加熱されるため、蓄熱材の中央部位の温度が一定以上であれば、高い確度で不完全な初期化部分は解消されている。したがって、初期化制御部41は、内部センサ33sの出力に基づいて、蓄熱材が完全に初期化されたか正確に判定することができる。 When initializing the heat storage device 31, the heat storage material contained in the heat storage device 31 is heated from the surroundings, so if the temperature of the central part of the heat storage material is above a certain level, the incompletely initialized portion is eliminated with a high degree of certainty. Therefore, the initialization control unit 41 can accurately determine whether the heat storage material has been completely initialized based on the output of the internal sensor 33s.

実施形態3の初期化制御部41は、図3に示した初期化処理と同様の処理により蓄熱器31の初期化を行う。ただし、実施形態3の初期化処理では、ステップS8、S9の初期化の判定ステップの替わりに、初期化制御部41は、内部センサ33sの出力から蓄熱材の中央部位の温度が閾値を越えている場合に、初期化が完了したと判定する。 The initialization control unit 41 of the third embodiment initializes the heat storage device 31 by a process similar to the initialization process shown in FIG. 3. However, in the initialization process of the third embodiment, instead of the initialization determination steps of steps S8 and S9, the initialization control unit 41 determines that the initialization is complete when the temperature of the central portion of the heat storage material exceeds a threshold value based on the output of the internal sensor 33s.

なお、実施形態3の初期化処理では、蓄熱器31の加熱処理の際に、初期化制御部41が、内部センサ33sにより計測される中央温度をモニタし、中央温度が完全な初期化を示す閾値を越えたら、加熱処理を終了し、かつ、初期化完了と判定するようにしてもよい。 In the initialization process of the third embodiment, the initialization control unit 41 may monitor the central temperature measured by the internal sensor 33s during the heating process of the heat storage unit 31, and when the central temperature exceeds a threshold value indicating complete initialization, the heating process may be terminated and the initialization may be determined to be complete.

以上のように、実施形態3の加温装置30によれば、初期化制御部41は、蓄熱材の中央部位の温度に基づいて、蓄熱材が完全に初期化されたか否かを判定する。蓄熱材は周囲から加熱されるため、中央部位が液相に遷移する温度になれば、初期化が完全であることが高い確度で判定できる。したがって、上記の判定方法により、初期化の完了を正確に判定できる。 As described above, according to the heating device 30 of the third embodiment, the initialization control unit 41 determines whether the heat storage material has been completely initialized based on the temperature of the central portion of the heat storage material. Because the heat storage material is heated from the surroundings, it can be determined with a high degree of certainty that the initialization is complete when the temperature of the central portion reaches a temperature at which the material transitions to a liquid phase. Therefore, the above-mentioned determination method can accurately determine whether the initialization is complete.

(実施形態4)
図6は、実施形態4の車両に設けられた温度センサを示す図である。実施形態4の加温装置は、蓄熱器31の初期化が完了したか判定する手段が異なるもので、その他の要素は実施形態1と同様である。
(Embodiment 4)
6 is a diagram showing a temperature sensor provided in a vehicle of embodiment 4. The heating device of embodiment 4 is different from the heating device of embodiment 1 in that the means for determining whether the initialization of the heat storage device 31 has been completed is different, and other elements are the same as those of embodiment 1.

実施形態4の車両1には、第1冷却液回路51内の冷却液の温度を検出する温度センサ51tが設けられている。温度センサ51tは、検出出力を初期化制御部41に送る。 The vehicle 1 of the fourth embodiment is provided with a temperature sensor 51t that detects the temperature of the coolant in the first coolant circuit 51. The temperature sensor 51t sends the detection output to the initialization control unit 41.

前述したように、蓄熱器31を初期化する際、蓄熱器31に含まれる蓄熱材は周囲から加熱されるため、蓄熱材の中央部位の温度が一定以上であれば、高い確度で不完全な初期化部分は解消されている。したがって、初期化制御部41は、蓄熱材の中央部位の温度に基づいて、蓄熱材が完全に初期化されたか正確に判定することができる。一方、初期温度が同一でありかつ同一構成の複数の蓄熱器31に、同様のパターンで熱を加えた場合、各蓄熱材の中央温度の上昇パターンは同様になる。したがって、初期温度と加熱の温度パターンから、蓄熱材の中央温度を高い確度で推定できる。この原理に基づいて、実施形態4の初期化制御部41は、蓄熱材の中央温度を推定し、蓄熱器31の初期化の完了の判定を行う。 As described above, when initializing the heat storage device 31, the heat storage material contained in the heat storage device 31 is heated from the surroundings, so if the temperature of the center part of the heat storage material is equal to or higher than a certain level, the incompletely initialized part is resolved with a high degree of accuracy. Therefore, the initialization control unit 41 can accurately determine whether the heat storage material has been completely initialized based on the temperature of the center part of the heat storage material. On the other hand, when heat is applied in a similar pattern to multiple heat storage devices 31 with the same initial temperature and configuration, the rise pattern of the center temperature of each heat storage material will be similar. Therefore, the center temperature of the heat storage material can be estimated with a high degree of accuracy from the initial temperature and the temperature pattern of heating. Based on this principle, the initialization control unit 41 of the fourth embodiment estimates the center temperature of the heat storage material and determines whether the initialization of the heat storage device 31 is complete.

具体的には、まず、実施形態4の初期化制御部41は、冷却液の温度が変化せずに長期間経過したときに、その時点の冷却液の温度から蓄熱材の中央部位の初期温度を定める。その後、初期化制御部41は、温度センサ51tの出力を継続的に取得し、冷却液の温度の変化パターンから蓄熱材の中央部位の温度の変化パターンを推定する。初期化制御部41は、時間の経過に伴って、上記の推定処理を繰り返すことで、任意なタイミングにおいて蓄熱材の中央部位の温度を推定する。 Specifically, first, the initialization control unit 41 of the fourth embodiment determines the initial temperature of the central portion of the heat storage material from the temperature of the coolant at a time when a long period of time has passed without the temperature of the coolant changing. After that, the initialization control unit 41 continuously acquires the output of the temperature sensor 51t, and estimates the change pattern of the temperature of the central portion of the heat storage material from the change pattern of the temperature of the coolant. The initialization control unit 41 repeats the above estimation process over time to estimate the temperature of the central portion of the heat storage material at any timing.

初期化制御部41は、蓄熱材の中央部位の温度の変化パターンを、冷却液の温度の変化パターンと、上記中央部位の初期温度とから、計算式を用いて推定してもよい。あるいは、実験またはシミュレーションにより、多数の初期温度と、多数の冷却液温度の変化パターンと、多数の中央部位温度の変化パターンとを対応づけたデータベースを用意しておき、初期化制御部41は、温度センサ51tの出力から得られた初期温度及び冷却液温度の変化パターンをデータベースと照合することで、推定される中央部位温度の変化パターンを取得してもよい。初期化制御部41は、蓄熱材の中央部位の温度の推定値が、完全な初期化を示す閾値を越えたことに基づいて、蓄熱材が完全に初期化されたと判定する。 The initialization control unit 41 may estimate the temperature change pattern of the central portion of the heat storage material from the temperature change pattern of the coolant and the initial temperature of the central portion using a formula. Alternatively, a database may be prepared in which a large number of initial temperatures, a large number of coolant temperature change patterns, and a large number of central portion temperature change patterns are associated through experiments or simulations, and the initialization control unit 41 may obtain the estimated central portion temperature change pattern by comparing the initial temperature and coolant temperature change patterns obtained from the output of the temperature sensor 51t with the database. The initialization control unit 41 determines that the heat storage material has been completely initialized based on the estimated value of the temperature of the central portion of the heat storage material exceeding a threshold value indicating complete initialization.

以上のように、実施形態4の加温装置によれば、初期化制御部41は、冷却液の温度パターンから蓄熱材の中央部位の温度を推定することで、蓄熱材が完全に初期化されたか判定する。蓄熱材は周囲から加熱されるため、中央部位が液相に遷移する温度になれば、初期化が完全であることが高い確度で判定できる。さらに、中央部位の温度は、冷却液の温度パターンから推定できる。したがって、上記の判定方法により、初期化の完了を正確に判定することができる。 As described above, according to the heating device of embodiment 4, the initialization control unit 41 estimates the temperature of the central part of the heat storage material from the temperature pattern of the coolant, thereby determining whether the heat storage material has been completely initialized. Because the heat storage material is heated from the surroundings, it can be determined with a high degree of certainty that the initialization is complete when the temperature of the central part reaches a temperature at which the central part transitions to a liquid phase. Furthermore, the temperature of the central part can be estimated from the temperature pattern of the coolant. Therefore, the above determination method can accurately determine whether the initialization is complete.

以上、本発明の各実施形態について説明した。しかし、本発明は上記実施形態に限られない。例えば、実施形態1では、初期化制御部が、所定期間の蓄熱材の電気抵抗の変化量に基づき初期化が完了したか否かを判定したが、例えば、蓄熱材の電気抵抗が所定量変化する時間長に基づいて初期化が完了したか否かを判定してもよい。また、上記実施形態では、冷却液を用いて蓄熱器を初期化する例を示したが、ヒータを用いて蓄熱器を初期化してもよいなど、初期化のために蓄熱器を加熱する手段は特に限定されない。また、上記実施形態においては、車両がEVである場合を説明したが、車両はエンジンを搭載していてもよい。また、上記実施形態では、加温対象機器が走行用バッテリである構成を示したが、荷室、窓ガラスなどの様々な機器が加温対象機器であってもよい。その他、実施形態で示した細部は、発明の趣旨を逸脱しない範囲で適宜変更可能である。 The above describes each embodiment of the present invention. However, the present invention is not limited to the above embodiments. For example, in the first embodiment, the initialization control unit determines whether the initialization is completed based on the amount of change in the electrical resistance of the heat storage material over a predetermined period, but it may determine whether the initialization is completed based on the time length during which the electrical resistance of the heat storage material changes by a predetermined amount. In addition, in the above embodiment, an example is shown in which the heat storage device is initialized using a coolant, but the heat storage device may be initialized using a heater, and the means for heating the heat storage device for initialization is not particularly limited. In addition, in the above embodiment, the vehicle is an EV, but the vehicle may be equipped with an engine. In addition, in the above embodiment, a configuration is shown in which the device to be heated is a driving battery, but various devices such as a luggage compartment and window glass may be the device to be heated. In addition, the details shown in the embodiments can be appropriately changed within the scope of the invention.

1 車両
11 駆動輪
12 走行モータ
13 PCU
14 走行用バッテリ
16 ラジエータ
17 運転操作部
30 加温装置
31 蓄熱器
32 発熱誘導器
31r 抵抗センサ
31t 温度センサ
33s 内部センサ
41 初期化制御部
42 システム制御部
43 走行制御部
51 第1冷却液回路
51t 温度センサ
52 第2冷却液回路
53、54 分岐路
55 熱交換器
V1~V4 三方弁
P1、P2 ポンプ
1 vehicle 11 driving wheel 12 traction motor 13 PCU
14 Driving battery 16 Radiator 17 Driving operation unit 30 Heating device 31 Heat storage unit 32 Heat generation inducer 31r Resistance sensor 31t Temperature sensor 33s Internal sensor 41 Initialization control unit 42 System control unit 43 Driving control unit 51 First coolant circuit 51t Temperature sensor 52 Second coolant circuit 53, 54 Branch path 55 Heat exchanger V1 to V4 Three-way valve P1, P2 Pump

Claims (3)

加温対象機器を有する車両に搭載される車両の加温装置であって、
発熱後の状態から発熱可能な状態へ初期化可能な蓄熱材を含み、前記加温対象機器を加温するために発熱する蓄熱器と、
前記蓄熱器を初期化させる初期化処理を実行する初期化制御部と、
を備え、
前記初期化処理は、前記初期化のために前記蓄熱器を加熱する加熱処理を含み、
前記初期化処理において、前記初期化制御部は、前記加熱処理を、終了条件を満たすまで継続し、前記終了条件を満たした後、所定期間における前記蓄熱材の電気抵抗の変化量が閾値以下であれば、前記初期化処理を終了する一方、前記電気抵抗の変化量が閾値を越えたら、再度、前記加熱処理を実行することを特徴とする車両の加温装置。
A vehicle heating device mounted on a vehicle having a heating target device,
A heat storage device that includes a heat storage material that can be initialized from a state after heat generation to a state capable of generating heat, and generates heat to heat the heating target device;
An initialization control unit that executes an initialization process to initialize the heat accumulator ;
Equipped with
the initialization process includes a heating process of heating the heat accumulator for the initialization process,
In the initialization process, the initialization control unit continues the heating process until a termination condition is satisfied, and after the termination condition is satisfied, if the amount of change in the electrical resistance of the heat storage material over a predetermined period of time is below a threshold value, terminates the initialization process, while if the amount of change in the electrical resistance exceeds the threshold value, executes the heating process again .
前記終了条件には、前記蓄熱材の温度が温度閾値以上、熱の供給時間が時間閾値以上、及び、前記蓄熱材の抵抗が抵抗閾値以上という条件のうち、2つ以上の条件が含まれ、
前記初期化制御部は、前記2つ以上の条件の全てが満たされた場合に前記終了条件が満たされたと判定することを特徴とする請求項記載の車両の加温装置。
The termination condition includes two or more of the following conditions: the temperature of the heat storage material is equal to or greater than a temperature threshold value; the heat supply time is equal to or greater than a time threshold value; and the resistance of the heat storage material is equal to or greater than a resistance threshold value.
2. The vehicle heating device according to claim 1 , wherein the initialization control unit determines that the termination condition is satisfied when all of the two or more conditions are satisfied.
加温対象機器を有する車両に搭載される車両の加温装置であって、
発熱後の固相状態から発熱可能な液相状態へ初期化可能な蓄熱材を含み、前記加温対象機器を加温するために発熱する蓄熱器と、
前記蓄熱器を初期化させる初期化処理を実行する初期化制御部と、
前記蓄熱材の液面を検出する液面センサと、
を備え、
前記初期化処理は、前記初期化のために前記蓄熱器を加熱する加熱処理を含み、
前記初期化処理において、前記初期化制御部は、前記液面センサが検出した前記液面の揺れの状態に基づいて前記初期化処理を終了することを特徴とする車両の加温装置。
A vehicle heating device mounted on a vehicle having a heating target device,
A heat storage device that includes a heat storage material that can be initialized from a solid phase state after heat generation to a liquid phase state capable of generating heat, and generates heat to heat the heating target device;
An initialization control unit that executes an initialization process to initialize the heat accumulator ;
A liquid level sensor for detecting the liquid level of the heat storage material;
Equipped with
the initialization process includes a heating process of heating the heat accumulator for the initialization process,
The vehicle heating device according to claim 1, wherein the initialization control unit terminates the initialization process based on a state of the liquid level swaying detected by the liquid level sensor.
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