WO2011086910A1 - Heating device - Google Patents

Heating device Download PDF

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Publication number
WO2011086910A1
WO2011086910A1 PCT/JP2011/000110 JP2011000110W WO2011086910A1 WO 2011086910 A1 WO2011086910 A1 WO 2011086910A1 JP 2011000110 W JP2011000110 W JP 2011000110W WO 2011086910 A1 WO2011086910 A1 WO 2011086910A1
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WO
WIPO (PCT)
Prior art keywords
heating
heat transfer
heat
flow pipe
heating device
Prior art date
Application number
PCT/JP2011/000110
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French (fr)
Japanese (ja)
Inventor
和昌 高田
政人 坪井
公 塚本
Original Assignee
サンデン株式会社
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Publication of WO2011086910A1 publication Critical patent/WO2011086910A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/162—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using electrical energy supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H2001/2268—Constructional features
    • B60H2001/2296—Constructional features integration into fluid/air heat exchangers

Definitions

  • the present invention relates to a heating device in which a heat medium of a heating element circulates.
  • a flat pipe is formed by embedding a flow pipe through which hot water as a heat medium flows and a heating wire heater (heating element) arranged in parallel with the flow pipe in a heat transfer metal.
  • a heat transfer body is formed, a plurality of the heat transfer bodies are integrated, and circulation pipes are connected in series to constitute a heat source device (see, for example, Patent Document 1).
  • a heating device using the heating wire heater as described above is mounted on the vehicle.
  • the above-mentioned conventional heating apparatus forms a heat transfer body by embedding a flow pipe and a heating wire heater in a heat transfer metal, and a plurality of the heat transfer bodies are integrated, and the flow pipes are connected in series. Therefore, there is a concern that the configuration of the heating device becomes complicated, the assembling property deteriorates, and the manufacturing cost increases.
  • the present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a heating device that can reduce the manufacturing cost with a simple configuration and can improve the heat transfer efficiency and the reliability.
  • the heating device of the present invention includes a series of flow pipes through which a heat medium flows, a heating element that heats the flow pipes, and a transmission that is formed integrally with the flow pipes by burying the flow pipes.
  • the heat transfer body has an insertion hole for housing the heat generating body (claim 1). Further, a cylindrical body formed by winding the flow pipe is embedded in the heat transfer body (Claim 2), and the length of the cylindrical body in the winding direction is substantially the same as the insertion length of the heating element into the insertion hole ( (Claim 3), the insertion hole is located inside the cylinder (Claim 4).
  • the cylindrical body is formed by spirally winding a flow pipe (Claim 5), and the heat transfer body is a heat transfer block that is integrally formed by casting the flow pipe into metal and inserting it. The holes are formed when the heat transfer block is cast.
  • the heating element has a terminal portion that is energized to cause the heating element to generate heat at one end, and the second housing has an inlet portion for the heat medium on the terminal portion side.
  • a plurality of heating elements are accommodated in the first housing (Claim 8), and the heating element has a terminal portion that is energized to heat the heating element at one end, and each of the plurality of heating elements or Control means for controlling energization to a plurality of terminals is provided. More specifically, the heating element is a heating wire heater (Claim 10), the heat medium heats the refrigerant circulating in the refrigeration circuit (Claim 11), and the refrigeration circuit is provided in an air conditioner for a vehicle ( Claim 12).
  • the heating device is formed integrally with the flow tube by burying the flow tube, a series of flow tubes through which the heat medium flows, a heating element for heating the flow tube, and the flow tube.
  • the heat transfer body has an insertion hole for accommodating the heat generating body.
  • the heat transfer body is in contact with the flow pipe without any gap, the heat of the heating element can be efficiently transferred to the heat medium via the heat transfer body and the flow pipe. Can be increased.
  • embedded in the heat transfer body is a series of seamless flow pipes that eliminate the connection of the heat medium flow path in the heating device, thus reducing the risk of heat medium leakage in the heating device. This can increase the reliability of the heating device.
  • the heat of the heating element is more efficiently transferred to the heat medium via the heat transfer body and the flow pipe. Therefore, the heat transfer efficiency of the heating device can be further increased.
  • the length of the cylindrical body in the winding direction is substantially the same as the insertion length of the heating element into the insertion hole, so that the heat generated by the heating element is distributed in the longitudinal direction. Since heat can be efficiently transmitted to the tubular body made of tubes, and eventually the heat medium flowing through the tubular body, the heat transfer efficiency of the heating device can be further increased.
  • the insertion hole is provided inside the cylindrical body, so that the heat generated by the heat generating element in the radial direction is formed by the cylindrical body constituted by the flow pipe, and thus the heat medium flowing through the cylindrical body. Therefore, the heat transfer efficiency of the heating device can be increased. Moreover, since the insertion hole is provided in the cylinder, the heat of the heating element is absorbed by the heat medium flowing through the flow pipe and then transferred to the heat transfer body outside the cylinder. It becomes difficult for heat to be transmitted to the outer surface of the body. Therefore, heat loss in the heat transfer body can be reduced, and the heat transfer efficiency of the heating device can be further increased. Furthermore, since the outer surface of the heat transfer body does not reach a high temperature, the risk of contact with the heat transfer body can be reduced, and the reliability of the heating device can also be increased.
  • the cylindrical body is formed by spirally winding the flow pipe, so that the cylindrical body is appropriately wound to form a simple cylindrical body, Since the substantial length of the flow path of the heat medium on the premise that the heat transfer body has the same volume can be increased, the heat transfer time and heat transfer area of the heat medium to the heating element can be effectively increased. Therefore, the heat transfer efficiency of the heating device can be further increased.
  • the heat transfer body is a heat transfer block that is integrally formed by casting a flow pipe into a metal, and the insertion hole is formed when the heat transfer block is cast. Since the insertion hole can be easily provided simultaneously with the formation of the heat block, the manufacturing cost of the heating device can be further reduced.
  • the heating element has a terminal portion that is energized to generate heat in the heating element at one end, and the second housing has an inlet portion of the heat medium on the terminal portion side.
  • the terminal portion can be cooled with a heat medium having a relatively low temperature before being heated by heat transfer from the heating element. Accordingly, since the heat resistance temperature of the terminal portion is generally lower than that of the heating element body, it is possible to prevent the terminal portion from reaching a temperature that the heating element emits, so that the durability of the heating element and the reliability of the heating device can be reduced. Can increase the sex.
  • the heating element has a terminal portion that is energized to heat the heating element at one end, and controls energization to each of the plurality of heating elements or a plurality of terminal portions. Control means are provided. Thereby, since the energization circuit of a heating apparatus can be made into multiple circuits and it can energize individually, even if one energization line is disconnected, a heating apparatus can be operated by another energization circuit.
  • the inrush current to the heating device can be reduced by energizing the plurality of terminal portions in stages when the heating device is started, an overload trip of the heating device can be prevented, thereby improving the reliability of the heating device. Can do.
  • the heating element is a heating wire heater, and the manufacturing cost of the heating device can be further reduced by using an inexpensive general-purpose heating wire heater. Since the heating wire heater is generally widely spread and has high reliability, the reliability of the heating device can be further improved.
  • the heat medium is suitable for heating the refrigerant circulating in the refrigeration circuit
  • the refrigeration circuit is used for a vehicle. It is provided in the air conditioner. In these cases, it is preferable that the refrigeration circuit and the air conditioner, and hence the assembly of the vehicle can be improved, and the manufacturing cost can be reduced.
  • FIG. 2 is a side view illustrating a state where a heating wire heater of the heat transfer block of FIG. 1 is not accommodated.
  • FIG. 2 is a front view illustrating a state where a heating wire heater of the heat transfer block of FIG. 1 is not accommodated.
  • a heating device 1 includes a circulation pipe 2 through which a heat medium circulates, four heating wire heaters (heating elements) 4 that heat the circulation pipe 2, and a circulation pipe embedded in the circulation pipe 2. 2 and a heat transfer block (heat transfer body) 6 formed integrally.
  • the heating device 1 is mounted on, for example, a vehicle such as a hybrid vehicle or an electric vehicle. Water as a heat medium is circulated through the distribution pipe 2 to be heated by a heating wire heater 4. It is used as a heat source for heating the refrigerant circulating in the refrigeration circuit of the air conditioner.
  • the heating wire heater 4 includes a coiled heating wire 12 such as a nichrome wire inserted into a bottomed cylindrical metal pipe 10, and a high electric power in the metal pipe 10 having a length L. It is formed by pressure-filling a heat-resistant insulating material 14 having insulating properties and thermal conductivity and enclosing the heating wire 12.
  • the heat resistant insulating material 14 is, for example, magnesium oxide, and the main body of the heating wire heater 4 including the heat resistant insulating material 14 and the metal pipe 10 has a heat resistant temperature of about 1100 ° C.
  • the terminal part 16 is provided in the opening part of the metal pipe 10, and the terminal part 16 is connected to the heating wire 12 and has a terminal 18 protruding from the heating wire heater 4.
  • Each terminal 18 of each heating wire heater 4 is electrically connected to an external power supply device 20 and constitutes an energization circuit 22 for energizing the heating wire 12.
  • the terminal portion 16 is formed by casting and molding silicon, glass or the like in the opening of the metal pipe 10, and the terminal portion 16 has a heat resistant temperature of about 200 ° C. to 300 ° C. Instead of the terminal 18, a lead wire connected to the heating wire 12 may be drawn out from the terminal portion 16.
  • each heating wire heater 4 is provided with a thermal fuse (not shown) to protect each energizing circuit 22 from a large current exceeding the rating flowing through the heating wire 12, Prevents ignition.
  • temperature sensors 24 such as thermistors for detecting the temperatures in the flow pipe 2 and the heat transfer block 6 are drawn out from a drawer pipe 8 described later.
  • Each temperature sensor 24 is electrically connected to an external electronic control unit (ECU) 26 that comprehensively controls the vehicle, and the power supply device 20 is also electrically connected to the ECU 26.
  • the ECU 26 is individually connected to each of the four heating wire heaters 4 or a plurality of terminals 16 according to the temperature in each metal pipe 10 detected by each temperature sensor 24 via the power supply device 20. Energization control for energizing is performed (control means).
  • the heating device 1 By performing this energization control, it becomes possible to energize the heating device 1 by making a plurality of energization circuits 22 individually. For example, even if one energization line 22 is disconnected, the other energization circuit 22 is energized and heated. The device 1 can be activated. Further, by energizing each terminal portion 16 stepwise when the heating device 1 is started, it is possible to reduce the inrush current to the heating device 1 and prevent the overload trip of the heating device 1.
  • the flow pipe 2 is, for example, a copper pipe having high heat resistance and heat conductivity, and has a heat medium inlet portion 28 and an outlet portion 30 at both ends of the flow pipe 2.
  • the cylindrical body 32 which has the length L1 of the winding direction is comprised by giving the process which winds a series of seamless copper pipes spirally in the presence of some gaps.
  • a space 34 in which the four heating wire heaters 4 can be arranged up and down is secured inside the cylindrical body 32, and the above-described drawer pipe 8 is provided in the space 34 in parallel with the winding direction of the flow pipe 2. .
  • the drawer pipes 8 are, for example, 2 at the position where the first and second heating wire heaters 2 are arranged from the top and at the position where the third and fourth heating wire heaters 2 are arranged from the top, respectively.
  • Each is provided in parallel, joined to the space 34 side of the cylindrical body 32 by welding or the like, and the temperature sensor 24 is inserted into each drawer tube 8 as described above.
  • the heat transfer block 6 is formed by casting a metal such as aluminum having high heat resistance and heat conductivity, and the cylindrical body 32 is illustrated when the metal is cast.
  • the heat transfer block 6 and the flow pipe 2 are integrally formed as one unit by being embedded in a mold that does not.
  • the inlet portion 28, the outlet portion 30, and the end portion 8 a on the inlet portion 28 side of the drawing pipe 8 are not embedded in the heat transfer block 6, but the portions other than the inlet portion 28 and the outlet portion 30 of the cylindrical body 32.
  • the end portion 8b of the drawer tube 8 on the outlet portion 30 side has a size and a shape embedded in the heat transfer block 6.
  • four insertion holes 36 for accommodating the respective heating wire heaters 4 are opened up and down at substantially equal intervals in the side surface 6a.
  • the insertion hole 36 has a depth L2 that does not penetrate the heat transfer block 6, and this length L2 is the length L1 of the metal pipe 10 of the heating wire heater 4 and the length L1 of the cylindrical body 32 in the winding direction.
  • the length L1 of the cylindrical body 32 in the winding direction is substantially the same as the insertion length of the heating wire heater 4 into the insertion hole 36.
  • Each insertion hole 36 is arranged at the position of the space 34 in FIG. 4, that is, each insertion hole 36 is provided inside the cylindrical body 32. Further, each insertion hole 36 is formed at the same time when the heat transfer block 6 is cast by previously providing a portion for forming each insertion hole 36 in a mold for casting the heat transfer block 6.
  • each insertion hole 36 has a hole diameter that is approximately the same as or slightly larger than the outer diameter of the metal pipe 10, so that each metal pipe 10 is inserted into the insertion hole 36 when inserted into the insertion hole 36.
  • the heat generated by the heating wire heater 4 is smoothly transmitted to the heat transfer block 6 by being abutted appropriately.
  • the heat medium is the heating wire heater 4. Flows through the flow pipe 2 while spirally turning from the inlet 28 to the outlet 30 in the longitudinal direction of the insertion hole 36.
  • the heating apparatus 1 is an integrated heating apparatus unitized with a simple configuration in which the insertion hole 36 for housing the heating wire heater 4 is provided in the heat transfer block 6 in which the flow pipe 2 is embedded. 1 can be formed, the configuration of the heating device 1 can be greatly simplified, and the assembly of the heating device 1 can be improved, and the manufacturing cost can be reduced.
  • the heat transfer block 6 is in contact with the flow pipe 2 without a gap, the heat of the heating wire heater 4 can be efficiently transferred to the heat medium via the heat transfer block 6 and the flow pipe 2.
  • the heat transfer efficiency of the apparatus 1 can be increased.
  • a series of seamless flow pipes 2 are embedded in the heat transfer block 6, and the connection of the heat medium flow path in the heating device 1 can be eliminated. The danger can be reduced and the reliability of the heating device 1 can be increased.
  • the cylindrical body 32 formed by winding the flow pipe 2 is embedded in the heat transfer block 6, the exposed portion of the flow pipe 2 from the heat transfer block 6 can be eliminated. Heat can be more efficiently transferred to the heat medium via the heat transfer block 6 and the flow pipe 2, and the heat transfer efficiency of the heating device 1 can be further increased. Further, the length L1 in the winding direction of the cylindrical body 32 is substantially the same as the insertion length of the heating wire heater 4 into the insertion hole 36, so that the heat generated by the heating wire heater 4 in the longitudinal direction is distributed through the flow tube. Therefore, the heat transfer efficiency of the heating device 1 can be further increased.
  • the insertion hole 36 is provided in the space 34 inside the cylindrical body 32, so that the heat generated by the heating wire heater 4 in the radial direction is efficiently transferred to the cylindrical body 32, and eventually to the heat medium flowing through the cylindrical body 32. Since it can transmit, the heat-transfer efficiency of the heating apparatus 1 can further be improved. Moreover, since the insertion hole 36 is provided in the space 34, the heat of the heating wire heater 4 is absorbed by the heat medium flowing through the flow pipe 2 and then transferred to the portion of the heat transfer block 6 outside the cylindrical body 32. Since it is heated, it becomes difficult to transmit heat to the outer surface of the heat transfer block 6. Therefore, the heat loss in the heat transfer block 6 can be reduced, and the heat transfer efficiency of the heating device 1 can be further increased. Furthermore, since the outer surface of the heat transfer block 6 does not reach a high temperature, the risk of contact with the heat transfer block 6 can be reduced, and the reliability of the heating device 1 can be increased.
  • the cylindrical body 32 is formed by spirally winding the flow pipe 2, so that the heat transfer block 6 is formed as compared with a case where the flow pipe 2 is appropriately wound to form a simple cylindrical body. Since the substantial length of the flow path of the heat medium on the premise of the same volume can be increased, the heat transfer time and heat transfer area of the heat medium to the heating wire heater 4 can be effectively increased, The heat transfer efficiency of the heating device 1 can be further increased.
  • the heat transfer block 6 is integrally formed by casting the flow pipe 2 in a metal and embedded, and the insertion hole 36 is formed when the heat transfer block 6 is cast, so that the insertion hole is formed simultaneously with the formation of the heat transfer block 6. Since 36 can be provided easily, the manufacturing cost of the heating apparatus 1 can be further reduced. Furthermore, by providing the heat medium inlet section 28 on the terminal section 16 side, the terminal section 16 can be cooled with a relatively low temperature heat medium before being heated by heat transfer from the heating wire heater 4. . Therefore, as described above, the terminal portion 16 has a lower heat-resistant temperature than the heating wire heater 4 main body, which is the part of the metal pipe 10, and therefore prevents the terminal portion 16 from reaching a high temperature generated by the heating wire 12. Therefore, the durability of the heating wire heater 4 and thus the reliability of the heating device 1 can be improved.
  • the heat transfer efficiency of the heating device 1 can be further increased. Further, by performing energization control for controlling whether or not the plurality of heating wire heaters 4 are energized, the energization circuit 22 of the heating device 1 can be made into a plurality of circuits and individually energized, so that one energization line 22 is disconnected. Even if it does, the heating apparatus 1 can be operated with the other electricity supply circuit 22. FIG. Moreover, since the inrush current to the heating device 1 can be reduced by energizing the plurality of terminal portions 16 in stages when the heating device 1 is started, an overload trip of the heating device 1 can be prevented. Reliability can be further increased.
  • the present invention is not limited to the above-described embodiments, and various modifications can be made.
  • the heat transfer block 6 and the insertion hole 36 are simultaneously formed by casting.
  • the method of forming the heat transfer block 6 is not limited to casting, and the insertion hole 36 is not It may be formed by cutting or the like after the heat block 6 is formed.
  • the heat transfer block 6 has a rectangular parallelepiped outer shape, but is not limited thereto, for example, if the heat transfer block 6 is formed by reducing the thickness according to the shape of the cylindrical body, The heating device 1 is preferably reduced in size and weight. Furthermore, in the heating apparatus 1 of the present embodiment, the cylindrical body 32 is formed by spirally winding the flow pipe 2, but the cylindrical body 32 having the space 34 is not limited to this winding shape.
  • heating wire heaters 4 are accommodated in the heat transfer block 6, but not limited to four, the above-described energization control for the heating wire heater 4 is possible. is there.
  • a heating element other than the heating wire heater 4 can be applied to the heating device 1 of the present embodiment, or a fluid other than water may be used as the heating medium.
  • the manufacturing cost of the heating device 1 can be reduced, and the general-purpose heating wire heater 4 is generally widespread and highly reliable. The reliability can be improved, which is preferable.
  • the heating device 1 of the present embodiment is provided in the refrigeration circuit, and the refrigeration circuit and the air conditioner and thus the manufacturing cost of the vehicle are reduced by incorporating the refrigeration circuit into the vehicle air conditioner of the hybrid vehicle or electric vehicle. Is preferable.
  • the heating device 1 can be used not only as a heat source for the refrigerant circulating in the refrigeration circuit of the vehicle air conditioner but also as a heat source for other purposes.
  • Heating device 1 Heating device 2 Distribution pipe 4 Heating wire heater (heating element) 6 Heat transfer block (heat transfer body) 16 Terminal section 26 ECU (control means) 28 Entrance 32 Tube 36 Insertion hole

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

Provided is a heating device such that under a simple configuration, production cost can be reduced, and heat transfer efficiency and reliability can be increased. The heating device (1) is equipped with a continuous flow pipe (2), heating elements (4) which heat the flow pipe (2), and a heat transfer body (6) which is formed integrally with the flow pipe (2) in such a way that the same is placed inside the heat transfer body (6). The heat transfer body (6) has insertion holes (36) for containing the heating elements (4).

Description

加熱装置Heating device
　本発明は、発熱体の熱媒体が流通する加熱装置に関する。 The present invention relates to a heating device in which a heat medium of a heating element circulates.
　この種の加熱装置には、内方を熱媒体である温水が流通する流通パイプと、この流通パイプに並設した電熱線ヒータ（発熱体）とを伝熱金属内に埋設して扁平状の伝熱体を形成し、この伝熱体を複数個集積させ、流通パイプを直列に接続し熱源器として構成したものが知られている（例えば特許文献１参照）。 In this type of heating device, a flat pipe is formed by embedding a flow pipe through which hot water as a heat medium flows and a heating wire heater (heating element) arranged in parallel with the flow pipe in a heat transfer metal. A heat transfer body is formed, a plurality of the heat transfer bodies are integrated, and circulation pipes are connected in series to constitute a heat source device (see, for example, Patent Document 1).
特開２００３－０４８４２２号公報JP 2003-048422 A
　昨今、ハイブリッド自動車や電気自動車の開発及び普及が促進され、今後はエンジンの廃熱を十分に利用できなくなることから、上述したような電熱線ヒータを発熱体とした加熱装置を上記車両に搭載し、エンジンの代替熱源として車両用空調装置の冷凍回路を循環する冷媒などの加熱に用いることが期待される。
　しかしながら、上記従来技術の加熱装置は、流通パイプと電熱線ヒータとを伝熱金属内に埋設して伝熱体を形成し、この伝熱体を複数個集積させ、流通パイプを直列に接続して構成されるため、加熱装置の構成が複雑になり、組立性が悪化して製造コストが増大することが懸念される。 Recently, the development and popularization of hybrid vehicles and electric vehicles has been promoted, and the waste heat of the engine cannot be fully utilized in the future. Therefore, a heating device using the heating wire heater as described above is mounted on the vehicle. As an alternative heat source for the engine, it is expected to be used for heating the refrigerant circulating in the refrigeration circuit of the vehicle air conditioner.
However, the above-mentioned conventional heating apparatus forms a heat transfer body by embedding a flow pipe and a heating wire heater in a heat transfer metal, and a plurality of the heat transfer bodies are integrated, and the flow pipes are connected in series. Therefore, there is a concern that the configuration of the heating device becomes complicated, the assembling property deteriorates, and the manufacturing cost increases.
　また、各伝熱体間を繋ぐ箇所における流通パイプは伝熱体から剥き出しにされているため、流通パイプからの熱媒体の熱損失が生じ、加熱装置の伝熱効率の悪化を招くおそれがある。
　更に、流通パイプを直列に接続する必要があるため、加熱装置の更なる複雑化を招くとともに、加熱装置において複数の接続箇所が存在することにより熱媒体漏洩の危険性が増大し、加熱装置の信頼性を損ないかねないとの問題もある。 Moreover, since the flow pipe in the location which connects between each heat transfer body is exposed from the heat transfer body, the heat loss of the heat medium from a flow pipe arises, and there exists a possibility of causing the deterioration of the heat transfer efficiency of a heating apparatus.
Furthermore, since it is necessary to connect the flow pipes in series, the heating device is further complicated, and the presence of a plurality of connection points in the heating device increases the risk of heat medium leakage, and the heating device There is also a problem that reliability may be impaired.
　本発明は上述の事情に基づいてなされたもので、その目的とするところは、簡易な構成で製造コストを低減でき、伝熱効率及び信頼性を高めることができる加熱装置を提供することにある。 The present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a heating device that can reduce the manufacturing cost with a simple configuration and can improve the heat transfer efficiency and the reliability.
　上記の目的を達成するため、本発明の加熱装置は、熱媒体が流通する一連の流通管と、流通管を加熱する発熱体と、流通管を埋設して流通管と一体に形成される伝熱体とを備え、伝熱体は、発熱体を収納する挿入穴を有することを特徴としている（請求項１）。
　また、流通管を巻回して形成した筒体を伝熱体に埋設し（請求項２）、筒体の巻回方向の長さは発熱体の挿入穴への挿入長さと略同一であり（請求項３）、挿入穴は筒体の内側に位置して設けられる（請求項４）。 In order to achieve the above object, the heating device of the present invention includes a series of flow pipes through which a heat medium flows, a heating element that heats the flow pipes, and a transmission that is formed integrally with the flow pipes by burying the flow pipes. The heat transfer body has an insertion hole for housing the heat generating body (claim 1).
Further, a cylindrical body formed by winding the flow pipe is embedded in the heat transfer body (Claim 2), and the length of the cylindrical body in the winding direction is substantially the same as the insertion length of the heating element into the insertion hole ( (Claim 3), the insertion hole is located inside the cylinder (Claim 4).
　具体的には、筒体は流通管を螺旋状に巻回して形成され（請求項５）、伝熱体は流通管を金属に鋳込んで埋設し一体に形成した伝熱ブロックであり、挿入穴は伝熱ブロックの鋳造時に形成される（請求項６）。
　更に、発熱体は、発熱体を発熱させるべく通電される端子部を一端に有し、第２筐体は、端子部側に熱媒体の入口部を有する（請求項７）。 Specifically, the cylindrical body is formed by spirally winding a flow pipe (Claim 5), and the heat transfer body is a heat transfer block that is integrally formed by casting the flow pipe into metal and inserting it. The holes are formed when the heat transfer block is cast.
Furthermore, the heating element has a terminal portion that is energized to cause the heating element to generate heat at one end, and the second housing has an inlet portion for the heat medium on the terminal portion side.
　また、第１筐体には発熱体が複数収容され（請求項８）、発熱体は、発熱体を発熱させるべく通電される端子部を一端に有し、複数の発熱体のうちの各々または複数群の端子部に対する通電を制御する制御手段を備える（請求項９）。
　更に、具体的には、発熱体は電熱線ヒータであり（請求項１０）、熱媒体は冷凍回路を循環する冷媒を加熱し（請求項１１）、冷凍回路は車両の空調装置に設けられる（請求項１２）。 A plurality of heating elements are accommodated in the first housing (Claim 8), and the heating element has a terminal portion that is energized to heat the heating element at one end, and each of the plurality of heating elements or Control means for controlling energization to a plurality of terminals is provided.
More specifically, the heating element is a heating wire heater (Claim 10), the heat medium heats the refrigerant circulating in the refrigeration circuit (Claim 11), and the refrigeration circuit is provided in an air conditioner for a vehicle ( Claim 12).
　請求項１記載の本発明の加熱装置によれば、加熱装置は、熱媒体が流通する一連の流通管と、流通管を加熱する発熱体と、流通管を埋設して流通管と一体に形成される伝熱体とを備え、伝熱体は、発熱体を収納する挿入穴を有する。これにより、流通管が埋設された伝熱体に発熱体を収容する挿入穴を設けるだけの簡易な構成でユニット化された一体の加熱装置を形成することができるため、加熱装置の構成を大幅に簡素化することができ、加熱装置の組立性の向上、ひいては製造コストの低減を実現することができる。 According to the heating device of the present invention as set forth in claim 1, the heating device is formed integrally with the flow tube by burying the flow tube, a series of flow tubes through which the heat medium flows, a heating element for heating the flow tube, and the flow tube. The heat transfer body has an insertion hole for accommodating the heat generating body. This makes it possible to form a unitized integrated heating device with a simple configuration that simply provides an insertion hole for accommodating the heating element in the heat transfer body in which the flow pipe is embedded, greatly increasing the configuration of the heating device. Thus, the assembly of the heating device can be improved, and the manufacturing cost can be reduced.
　また、伝熱体が流通管に隙間無く接触しているため、発熱体の熱を伝熱体、流通管を介して熱媒体に効率良く伝熱することができるため、加熱装置の伝熱効率を高めることができる。
　更に、伝熱体に埋設されるのは繋ぎ目の無い一連の流通管であり、加熱装置における熱媒体流路の接続箇所をなくすことができるため、加熱装置における熱媒体漏洩の危険性を低減することができ、加熱装置の信頼性を高めることができる。 In addition, since the heat transfer body is in contact with the flow pipe without any gap, the heat of the heating element can be efficiently transferred to the heat medium via the heat transfer body and the flow pipe. Can be increased.
Furthermore, embedded in the heat transfer body is a series of seamless flow pipes that eliminate the connection of the heat medium flow path in the heating device, thus reducing the risk of heat medium leakage in the heating device. This can increase the reliability of the heating device.
　請求項２記載の発明によれば、流通管を巻回して形成した筒体を伝熱体に埋設することにより、発熱体の熱を伝熱体、流通管を介して熱媒体に更に効率良く伝達することができ、加熱装置の伝熱効率を更に高めることができる。
　請求項３記載の発明によれば、筒体の巻回方向の長さは発熱体の挿入穴への挿入長さと 略同一であることにより、発熱体がその長手方向に亘って発する熱を流通管からなる筒体
、ひいては筒体を流れる熱媒体に効率良く伝達することができるため、加熱装置の更に伝 熱効率を高めることができる。 According to the second aspect of the present invention, by burying the cylindrical body formed by winding the flow pipe in the heat transfer body, the heat of the heating element is more efficiently transferred to the heat medium via the heat transfer body and the flow pipe. Therefore, the heat transfer efficiency of the heating device can be further increased.
According to the third aspect of the present invention, the length of the cylindrical body in the winding direction is substantially the same as the insertion length of the heating element into the insertion hole, so that the heat generated by the heating element is distributed in the longitudinal direction. Since heat can be efficiently transmitted to the tubular body made of tubes, and eventually the heat medium flowing through the tubular body, the heat transfer efficiency of the heating device can be further increased.
　請求項４記載の発明によれば、挿入穴が筒体の内側に位置して設けられることにより、発熱体がその径方向に発する熱を流通管からなる筒体、ひいては筒体を流れる熱媒体に効率良く伝達することができるため、加熱装置の伝熱効率を高めることができる。
　しかも、挿入穴が筒体内に位置して設けられることにより、発熱体の熱は流通管を流れる熱媒体に吸熱された後に筒体の外側の伝熱体の部位に伝熱されるため、伝熱体の外面にまで熱が伝わりにくくなる。従って、伝熱体における熱損失を低減することができ、加熱装置の伝熱効率を更に高めることができる。更に、伝熱体の外面が高温にならないため、伝熱体への接触を伴う危険性を低減することができ、加熱装置の信頼性をも高めることが
できる。 According to the invention of claim 4, the insertion hole is provided inside the cylindrical body, so that the heat generated by the heat generating element in the radial direction is formed by the cylindrical body constituted by the flow pipe, and thus the heat medium flowing through the cylindrical body. Therefore, the heat transfer efficiency of the heating device can be increased.
Moreover, since the insertion hole is provided in the cylinder, the heat of the heating element is absorbed by the heat medium flowing through the flow pipe and then transferred to the heat transfer body outside the cylinder. It becomes difficult for heat to be transmitted to the outer surface of the body. Therefore, heat loss in the heat transfer body can be reduced, and the heat transfer efficiency of the heating device can be further increased. Furthermore, since the outer surface of the heat transfer body does not reach a high temperature, the risk of contact with the heat transfer body can be reduced, and the reliability of the heating device can also be increased.
　請求項５記載の発明によれば、筒体は流通管を螺旋状に巻回して形成されることにより、流通管を適当に巻回して単なる筒体を形成するだけの場合に比して、伝熱体を同一容積とした前提における熱媒体の流路の実質的な長さを長くすることができるため、発熱体に対する熱媒体の伝熱時間及び伝熱面積を効果的に増大させることができるため、加熱装置の伝熱効率を更に高めることができる。 According to the invention of claim 5, the cylindrical body is formed by spirally winding the flow pipe, so that the cylindrical body is appropriately wound to form a simple cylindrical body, Since the substantial length of the flow path of the heat medium on the premise that the heat transfer body has the same volume can be increased, the heat transfer time and heat transfer area of the heat medium to the heating element can be effectively increased. Therefore, the heat transfer efficiency of the heating device can be further increased.
　請求項６記載の発明によれば、伝熱体は流通管を金属に鋳込んで埋設し一体に形成した伝熱ブロックであり、挿入穴は伝熱ブロックの鋳造時に形成されることにより、伝熱ブロックの形成と同時に挿入穴を容易に設けることができるため、加熱装置の製造コストを更に低減することができる。 According to the sixth aspect of the present invention, the heat transfer body is a heat transfer block that is integrally formed by casting a flow pipe into a metal, and the insertion hole is formed when the heat transfer block is cast. Since the insertion hole can be easily provided simultaneously with the formation of the heat block, the manufacturing cost of the heating device can be further reduced.
　請求項７記載の発明によれば、発熱体は、発熱体を発熱させるべく通電される端子部を一端に有し、第２筐体は端子部側に熱媒体の入口部を有することにより、発熱体からの伝熱で加熱される前の比較的低温となる熱媒体で端子部を冷却することができる。従って、一般に端子部は発熱体本体よりも耐熱温度が低いことから、端子部が発熱体の発する温度まで高温になることを防止することができるため、発熱体の耐久性、ひいては加熱装置の信頼性を高めることができる。 According to the invention of claim 7, the heating element has a terminal portion that is energized to generate heat in the heating element at one end, and the second housing has an inlet portion of the heat medium on the terminal portion side. The terminal portion can be cooled with a heat medium having a relatively low temperature before being heated by heat transfer from the heating element. Accordingly, since the heat resistance temperature of the terminal portion is generally lower than that of the heating element body, it is possible to prevent the terminal portion from reaching a temperature that the heating element emits, so that the durability of the heating element and the reliability of the heating device can be reduced. Can increase the sex.
　請求項８記載の発明によれば、第１筐体には発熱体が複数収容されることにより、第１筐体、ひいては発熱体に対する熱媒体の伝熱時間及び伝熱面積を更に効果的に増大させることができ、加熱装置の伝熱効率を更に高めることができる。
　請求項９記載の発明によれば、発熱体は、発熱体を発熱させるべく通電される端子部を一端に有し、複数の発熱体のうちの各々または複数群の端子部に対する通電を制御する制御手段を備える。これにより、加熱装置の通電回路を複数回路化して個別に通電することができるため、１つの通電回線が断線したとしても他の通電回路で加熱装置を作動させることができる。 According to the eighth aspect of the present invention, a plurality of heating elements are accommodated in the first casing, so that the heat transfer time and the heat transfer area of the heat medium with respect to the first casing and, consequently, the heating elements can be further effectively improved. The heat transfer efficiency of the heating device can be further increased.
According to the ninth aspect of the present invention, the heating element has a terminal portion that is energized to heat the heating element at one end, and controls energization to each of the plurality of heating elements or a plurality of terminal portions. Control means are provided. Thereby, since the energization circuit of a heating apparatus can be made into multiple circuits and it can energize individually, even if one energization line is disconnected, a heating apparatus can be operated by another energization circuit.
　しかも、加熱装置の起動時に複数の端子部に段階的に通電することにより加熱装置に対する突入電流を低減し、加熱装置の過負荷トリップを防止することができるため、加熱装置の信頼性を高めることができる。 Moreover, since the inrush current to the heating device can be reduced by energizing the plurality of terminal portions in stages when the heating device is started, an overload trip of the heating device can be prevented, thereby improving the reliability of the heating device. Can do.
　請求項１０記載の発明によれば、具体的には、発熱体は電熱線ヒータであり、安価な汎用の電熱線ヒータを用いることで加熱装置の製造コストを更に低減することができるとともに、汎用の電熱線ヒータは一般に広く普及して信頼性も高いことから、加熱装置の信頼性を更に高めることができる。
　請求項１１記載の発明によれば、具体的には、熱媒体は冷凍回路を循環する冷媒を加熱するのに好適であり、また、請求項１２記載の発明によれば、冷凍回路は車両の空調装置に設けられ、これらの場合には冷凍回路及び空調装置、ひいては車両の組立性の向上、ひいては製造コストの低減を図ることができて好ましい。 Specifically, the heating element is a heating wire heater, and the manufacturing cost of the heating device can be further reduced by using an inexpensive general-purpose heating wire heater. Since the heating wire heater is generally widely spread and has high reliability, the reliability of the heating device can be further improved.
Specifically, according to the invention described in claim 11, the heat medium is suitable for heating the refrigerant circulating in the refrigeration circuit, and according to the invention described in claim 12, the refrigeration circuit is used for a vehicle. It is provided in the air conditioner. In these cases, it is preferable that the refrigeration circuit and the air conditioner, and hence the assembly of the vehicle can be improved, and the manufacturing cost can be reduced.
第１実施例の加熱装置を伝熱ブロックを透視して示した斜視図である。It is the perspective view which showed the heating apparatus of 1st Example seeing through the heat-transfer block. 図１の電熱線ヒータ及び温度センサの外部接続を示す図である。It is a figure which shows the external connection of the heating wire heater and temperature sensor of FIG. 図１の流通管の側面図である。It is a side view of the distribution pipe of FIG. 図１の流通管の正面図である。It is a front view of the distribution pipe of FIG. 図１の伝熱ブロックの電熱線ヒータを収容してない状態を透視して示した側面図である。FIG. 2 is a side view illustrating a state where a heating wire heater of the heat transfer block of FIG. 1 is not accommodated. 図１の伝熱ブロックの電熱線ヒータを収容してない状態を透視して示した正面図である。FIG. 2 is a front view illustrating a state where a heating wire heater of the heat transfer block of FIG. 1 is not accommodated.
　図１～図６は第１実施例の加熱装置を示す。
　図１に示されるように、加熱装置１は、熱媒体が流通する流通管２と、流通管２を加熱する４つの電熱線ヒータ（発熱体）４と、流通管２を埋設して流通管２と一体に形成される伝熱ブロック（伝熱体）６との１つのユニットから構成されている。加熱装置１は例えばハイブリッド自動車や電気自動車などの車両に搭載され、流通管２には熱媒体としての水が流通されて電熱線ヒータ４により温水にされ、この温水がエンジンの代替熱源として車両用空調装置の冷凍回路を循環する冷媒などを加熱するための熱源として利用される。 1 to 6 show a heating apparatus according to a first embodiment.
As shown in FIG. 1, a heating device 1 includes a circulation pipe 2 through which a heat medium circulates, four heating wire heaters (heating elements) 4 that heat the circulation pipe 2, and a circulation pipe embedded in the circulation pipe 2. 2 and a heat transfer block (heat transfer body) 6 formed integrally. The heating device 1 is mounted on, for example, a vehicle such as a hybrid vehicle or an electric vehicle. Water as a heat medium is circulated through the distribution pipe 2 to be heated by a heating wire heater 4. It is used as a heat source for heating the refrigerant circulating in the refrigeration circuit of the air conditioner.
　図２に示されるように、電熱線ヒータ４は、有底円筒状の金属パイプ１０内にニクロム線などのコイル状の電熱線１２を挿入し、長さＬを有する金属パイプ１０内に高い電気絶縁性及び熱伝導性を有する耐熱絶縁材１４を加圧充填して電熱線１２を封入することで形成される。耐熱絶縁材１４は例えば酸化マグネシウムなどであり、耐熱絶縁材１４及び金属パイプ１０を含む電熱線ヒータ４の本体は１１００℃程度の耐熱温度を有する。 As shown in FIG. 2, the heating wire heater 4 includes a coiled heating wire 12 such as a nichrome wire inserted into a bottomed cylindrical metal pipe 10, and a high electric power in the metal pipe 10 having a length L. It is formed by pressure-filling a heat-resistant insulating material 14 having insulating properties and thermal conductivity and enclosing the heating wire 12. The heat resistant insulating material 14 is, for example, magnesium oxide, and the main body of the heating wire heater 4 including the heat resistant insulating material 14 and the metal pipe 10 has a heat resistant temperature of about 1100 ° C.
　金属パイプ１０の開口部には端子部１６が設けられ、端子部１６は電熱線１２に接続されるとともに電熱線ヒータ４から突出される端子１８を有している。各電熱線ヒータ４の各端子１８は外部の電源装置２０に電気的に接続されており、電熱線１２に通電するための通電回路２２を構成している。端子部１６は金属パイプ１０の開口部にシリコンやガラスなどを鋳込みモールド成形して形成され、端子部１６は２００℃～３００℃程度の耐熱温度を有する。なお、端子１８の代わりに電熱線１２に接続されたリード線を端子部１６から引き出しても良い。 The terminal part 16 is provided in the opening part of the metal pipe 10, and the terminal part 16 is connected to the heating wire 12 and has a terminal 18 protruding from the heating wire heater 4. Each terminal 18 of each heating wire heater 4 is electrically connected to an external power supply device 20 and constitutes an energization circuit 22 for energizing the heating wire 12. The terminal portion 16 is formed by casting and molding silicon, glass or the like in the opening of the metal pipe 10, and the terminal portion 16 has a heat resistant temperature of about 200 ° C. to 300 ° C. Instead of the terminal 18, a lead wire connected to the heating wire 12 may be drawn out from the terminal portion 16.
　また、各電熱線ヒータ４の電熱線１２には図示しない温度ヒューズがそれぞれ設けられ、電熱線１２を流れる定格以上の大電流から各通電回路２２を保護し、各通電回路２２の過剰な高温や発火を防止している。更に、図１にも示されるように、後述する引出し管８からは流通管２及び伝熱ブロック６内の温度を検出するサーミスタなどの温度センサ２４がそれぞれ引き出されている。 Moreover, the heating wire 12 of each heating wire heater 4 is provided with a thermal fuse (not shown) to protect each energizing circuit 22 from a large current exceeding the rating flowing through the heating wire 12, Prevents ignition. Further, as shown in FIG. 1, temperature sensors 24 such as thermistors for detecting the temperatures in the flow pipe 2 and the heat transfer block 6 are drawn out from a drawer pipe 8 described later.
　各温度センサ２４は車両を総合的に制御する外部の電子制御装置（ＥＣＵ）２６に電気的に接続され、ＥＣＵ２６には電源装置２０も電気的に接続されている。ＥＣＵ２６は電源装置２０を介し、各温度センサ２４にて検出される各金属パイプ１０内の温度に応じて、４つの各電熱線ヒータ４のうちの各々または複数群の端子部１６に対して個別に通電する通電制御が行われる（制御手段）。 Each temperature sensor 24 is electrically connected to an external electronic control unit (ECU) 26 that comprehensively controls the vehicle, and the power supply device 20 is also electrically connected to the ECU 26. The ECU 26 is individually connected to each of the four heating wire heaters 4 or a plurality of terminals 16 according to the temperature in each metal pipe 10 detected by each temperature sensor 24 via the power supply device 20. Energization control for energizing is performed (control means).
　この通電制御を行うことにより、加熱装置１の通電回路２２を複数回路化して個別に通電することが可能となり、例えば１つの通電回線２２が断線したとしても他の通電回路２２を通電させ、加熱装置１を作動させることができる。また、加熱装置１の起動時に各端子部１６に段階的に通電することにより、加熱装置１に対する突入電流を低減し、加熱装置１の過負荷トリップを防止することも可能である。 By performing this energization control, it becomes possible to energize the heating device 1 by making a plurality of energization circuits 22 individually. For example, even if one energization line 22 is disconnected, the other energization circuit 22 is energized and heated. The device 1 can be activated. Further, by energizing each terminal portion 16 stepwise when the heating device 1 is started, it is possible to reduce the inrush current to the heating device 1 and prevent the overload trip of the heating device 1.
　図３及び図４に示されるように、流通管２は、高い耐熱性及び熱伝導性を有する例えば銅管であって、流通管２の両端に熱媒体の入口部２８及び出口部３０を有し、一連の繋ぎ目の無い銅管を螺旋状に互いに若干の隙間を存して巻回する加工を施すことにより巻回方向の長さＬ１を有する筒体３２を構成している。筒体３２の内側には４つの電熱線ヒータ４を上下に配置可能な空間３４が確保され、空間３４には流通管２の巻回方向に平行に、上述した引出し管８が設けられている。 As shown in FIGS. 3 and 4, the flow pipe 2 is, for example, a copper pipe having high heat resistance and heat conductivity, and has a heat medium inlet portion 28 and an outlet portion 30 at both ends of the flow pipe 2. And the cylindrical body 32 which has the length L1 of the winding direction is comprised by giving the process which winds a series of seamless copper pipes spirally in the presence of some gaps. A space 34 in which the four heating wire heaters 4 can be arranged up and down is secured inside the cylindrical body 32, and the above-described drawer pipe 8 is provided in the space 34 in parallel with the winding direction of the flow pipe 2. .
　引出し管８は、例えば上から１つ目と２つ目の電熱線ヒータ２が配置される位置、及び上から３つ目と４つ目の電熱線ヒータ２が配置される位置に、それぞれ２つずつ平行して設けられ、筒体３２の空間３４側に溶接などによって接合され、各引出し管８には上述したようにそれぞれ温度センサ２４が挿入される。 The drawer pipes 8 are, for example, 2 at the position where the first and second heating wire heaters 2 are arranged from the top and at the position where the third and fourth heating wire heaters 2 are arranged from the top, respectively. Each is provided in parallel, joined to the space 34 side of the cylindrical body 32 by welding or the like, and the temperature sensor 24 is inserted into each drawer tube 8 as described above.
　図５及び図６に示されるように、伝熱ブロック６は、高い耐熱性及び熱伝導性を有する例えばアルミニウムなどの金属を鋳込んで形成され、この金属を鋳造する際に筒体３２を図示しない金型内に埋設することにより、伝熱ブロック６及び流通管２が１つのユニットとして一体に形成される。 As shown in FIGS. 5 and 6, the heat transfer block 6 is formed by casting a metal such as aluminum having high heat resistance and heat conductivity, and the cylindrical body 32 is illustrated when the metal is cast. The heat transfer block 6 and the flow pipe 2 are integrally formed as one unit by being embedded in a mold that does not.
　上記金型は、入口部２８、出口部３０、及び引出し管８の入口部２８側の端部８ａが伝熱ブロック６に埋設されないが、筒体３２の入口部２８及び出口部３０以外の部位、及び引出し管８の出口部３０側の端部８ｂが伝熱ブロック６に埋設される大きさ及び形状を有している。
　伝熱ブロック６の入口部２８側の側面６ａには各電熱線ヒータ４がそれぞれ収容される４つの挿入穴３６が側面６ａにおいて上下に略等間隔に集約されて開口されている。挿入穴３６は、伝熱ブロック６を貫通しない長さＬ２の奥行きを有し、この長さＬ２は電熱線ヒータ４の金属パイプ１０の長さＬ及び筒体３２の巻回方向の長さＬ１と略同一となっており、換言すると、筒体３２の巻回方向の長さＬ１は電熱線ヒータ４の挿入穴３６への挿入長さと略同一である。 In the mold, the inlet portion 28, the outlet portion 30, and the end portion 8 a on the inlet portion 28 side of the drawing pipe 8 are not embedded in the heat transfer block 6, but the portions other than the inlet portion 28 and the outlet portion 30 of the cylindrical body 32. And the end portion 8b of the drawer tube 8 on the outlet portion 30 side has a size and a shape embedded in the heat transfer block 6.
On the side surface 6a of the heat transfer block 6 on the inlet portion 28 side, four insertion holes 36 for accommodating the respective heating wire heaters 4 are opened up and down at substantially equal intervals in the side surface 6a. The insertion hole 36 has a depth L2 that does not penetrate the heat transfer block 6, and this length L2 is the length L1 of the metal pipe 10 of the heating wire heater 4 and the length L1 of the cylindrical body 32 in the winding direction. In other words, the length L1 of the cylindrical body 32 in the winding direction is substantially the same as the insertion length of the heating wire heater 4 into the insertion hole 36.
　各挿入穴３６は、図４でいう空間３４の位置に配されており、即ち、各挿入穴３６は筒体３２の内側に位置して設けられている。また、各挿入穴３６は、伝熱ブロック６を鋳造するための金型に各挿入穴３６形成用の部位を予め設けることにより、伝熱ブロック６の鋳造時に同時に形成される。 Each insertion hole 36 is arranged at the position of the space 34 in FIG. 4, that is, each insertion hole 36 is provided inside the cylindrical body 32. Further, each insertion hole 36 is formed at the same time when the heat transfer block 6 is cast by previously providing a portion for forming each insertion hole 36 in a mold for casting the heat transfer block 6.
　また、各挿入穴３６は金属パイプ１０の外径寸法と同程度か、または若干大きい穴径を有しており、これより各金属パイプ１０は挿入穴３６に挿入されたときに挿入穴３６に適度に当接され、電熱線ヒータ４の発熱が伝熱ブロック６に円滑に伝達される。
　第１実施例の加熱装置１では、図５中に実線矢印で示されるように（伝熱ブロック６の図５でいう背面側の熱媒体の流れは省略する）、熱媒体は電熱線ヒータ４が収容される挿入穴３６の長手方向、即ち入口部２８から出口部３０に向けて螺旋状に旋回しながら流通管２を流通する。 Further, each insertion hole 36 has a hole diameter that is approximately the same as or slightly larger than the outer diameter of the metal pipe 10, so that each metal pipe 10 is inserted into the insertion hole 36 when inserted into the insertion hole 36. The heat generated by the heating wire heater 4 is smoothly transmitted to the heat transfer block 6 by being abutted appropriately.
In the heating device 1 of the first embodiment, as indicated by solid arrows in FIG. 5 (the flow of the heat medium on the back side in FIG. 5 of the heat transfer block 6 is omitted), the heat medium is the heating wire heater 4. Flows through the flow pipe 2 while spirally turning from the inlet 28 to the outlet 30 in the longitudinal direction of the insertion hole 36.
　上述した第１実施例の加熱装置１は、流通管２が埋設された伝熱ブロック６に電熱線ヒータ４を収容する挿入穴３６を設けるだけの簡易な構成でユニット化された一体の加熱装置１を形成することができるため、加熱装置１の構成を大幅に簡素化することができ、加熱装置１の組立性の向上、ひいては製造コストの低減を実現することができる。 The heating apparatus 1 according to the first embodiment described above is an integrated heating apparatus unitized with a simple configuration in which the insertion hole 36 for housing the heating wire heater 4 is provided in the heat transfer block 6 in which the flow pipe 2 is embedded. 1 can be formed, the configuration of the heating device 1 can be greatly simplified, and the assembly of the heating device 1 can be improved, and the manufacturing cost can be reduced.
　また、伝熱ブロック６が流通管２に隙間無く接触しているため、電熱線ヒータ４の熱を伝熱ブロック６、流通管２を介して熱媒体に効率良く伝熱することができ、加熱装置１の伝熱効率を高めることができる。
　更に、伝熱ブロック６に埋設されるのは繋ぎ目の無い一連の流通管２であり、加熱装置１における熱媒体流路の接続箇所をなくすことができるため、加熱装置１における熱媒体漏洩の危険性を低減することができ、加熱装置１の信頼性を高めることができる。 Further, since the heat transfer block 6 is in contact with the flow pipe 2 without a gap, the heat of the heating wire heater 4 can be efficiently transferred to the heat medium via the heat transfer block 6 and the flow pipe 2. The heat transfer efficiency of the apparatus 1 can be increased.
Further, a series of seamless flow pipes 2 are embedded in the heat transfer block 6, and the connection of the heat medium flow path in the heating device 1 can be eliminated. The danger can be reduced and the reliability of the heating device 1 can be increased.
　更にまた、流通管２を巻回して形成した筒体３２を伝熱ブロック６に埋設することにより、伝熱ブロック６からの流通管２の剥き出し部位をなくすことができるため、電熱線ヒータ４の熱を伝熱ブロック６、流通管２を介して熱媒体に更に効率良く伝熱することができ、加熱装置１の更に伝熱効率を高めることができる。
　また、筒体３２の巻回方向の長さＬ１は挿入穴３６への電熱線ヒータ４の挿入長さと略同一であることにより、電熱線ヒータ４がその長手方向に亘って発する熱を流通管２からなる筒体３２、ひいては筒体３２を流れる熱媒体に効率良く伝達することができるため、加熱装置１の伝熱効率を更に高めることができる。 Furthermore, since the cylindrical body 32 formed by winding the flow pipe 2 is embedded in the heat transfer block 6, the exposed portion of the flow pipe 2 from the heat transfer block 6 can be eliminated. Heat can be more efficiently transferred to the heat medium via the heat transfer block 6 and the flow pipe 2, and the heat transfer efficiency of the heating device 1 can be further increased.
Further, the length L1 in the winding direction of the cylindrical body 32 is substantially the same as the insertion length of the heating wire heater 4 into the insertion hole 36, so that the heat generated by the heating wire heater 4 in the longitudinal direction is distributed through the flow tube. Therefore, the heat transfer efficiency of the heating device 1 can be further increased.
　更に、挿入穴３６は筒体３２の内側の空間３４に位置して設けられることにより、電熱線ヒータ４がその径方向に発する熱を筒体３２、ひいては筒体３２を流れる熱媒体に効率良く伝達することができるため、加熱装置１の伝熱効率を更に高めることができる。
　しかも、挿入穴３６が空間３４に位置して設けられることにより、電熱線ヒータ４の熱は流通管２を流れる熱媒体に吸熱された後に筒体３２の外側の伝熱ブロック６の部位に伝熱されるため、伝熱ブロック６の外面にまで熱が伝わりにくくなる。従って、伝熱ブロック６における熱損失を低減することができ、加熱装置１の伝熱効率を更に高めることができる。更に、伝熱ブロック６の外面が高温にならないため、伝熱ブロック６への接触を伴う危険性を低減することができ、加熱装置１の信頼性をも高めることができる。 Furthermore, the insertion hole 36 is provided in the space 34 inside the cylindrical body 32, so that the heat generated by the heating wire heater 4 in the radial direction is efficiently transferred to the cylindrical body 32, and eventually to the heat medium flowing through the cylindrical body 32. Since it can transmit, the heat-transfer efficiency of the heating apparatus 1 can further be improved.
Moreover, since the insertion hole 36 is provided in the space 34, the heat of the heating wire heater 4 is absorbed by the heat medium flowing through the flow pipe 2 and then transferred to the portion of the heat transfer block 6 outside the cylindrical body 32. Since it is heated, it becomes difficult to transmit heat to the outer surface of the heat transfer block 6. Therefore, the heat loss in the heat transfer block 6 can be reduced, and the heat transfer efficiency of the heating device 1 can be further increased. Furthermore, since the outer surface of the heat transfer block 6 does not reach a high temperature, the risk of contact with the heat transfer block 6 can be reduced, and the reliability of the heating device 1 can be increased.
　また、筒体３２は流通管２を螺旋状に巻回して形成されることにより、流通管２を適当に巻回して単なる筒体を形成するだけの場合に比して、伝熱ブロック６を同一容積とした前提における熱媒体の流路の実質的な長さを長くすることができるため、電熱線ヒータ４に対する熱媒体の伝熱時間及び伝熱面積を効果的に増大させることができ、加熱装置１の伝熱効率を更に高めることができる。 In addition, the cylindrical body 32 is formed by spirally winding the flow pipe 2, so that the heat transfer block 6 is formed as compared with a case where the flow pipe 2 is appropriately wound to form a simple cylindrical body. Since the substantial length of the flow path of the heat medium on the premise of the same volume can be increased, the heat transfer time and heat transfer area of the heat medium to the heating wire heater 4 can be effectively increased, The heat transfer efficiency of the heating device 1 can be further increased.
　更に、伝熱ブロック６は流通管２を金属に鋳込んで埋設し一体に形成され、挿入穴３６は伝熱ブロック６の鋳造時に形成されることにより、伝熱ブロック６の形成と同時に挿入穴３６を容易に設けることができるため、加熱装置１の製造コストを更に低減することができる。
　更にまた、端子部１６側に熱媒体の入口部２８を設けることにより、電熱線ヒータ４からの伝熱で加熱される前の比較的低温となる熱媒体で端子部１６を冷却することができる。従って、上述したように端子部１６は金属パイプ１０の部位である電熱線ヒータ４本体よりも耐熱温度が低いことから、端子部１６が電熱線１２の発する温度まで高温になることを防止することができるため、電熱線ヒータ４の耐久性ひいては加熱装置１の信頼性を高めることができる。 Further, the heat transfer block 6 is integrally formed by casting the flow pipe 2 in a metal and embedded, and the insertion hole 36 is formed when the heat transfer block 6 is cast, so that the insertion hole is formed simultaneously with the formation of the heat transfer block 6. Since 36 can be provided easily, the manufacturing cost of the heating apparatus 1 can be further reduced.
Furthermore, by providing the heat medium inlet section 28 on the terminal section 16 side, the terminal section 16 can be cooled with a relatively low temperature heat medium before being heated by heat transfer from the heating wire heater 4. . Therefore, as described above, the terminal portion 16 has a lower heat-resistant temperature than the heating wire heater 4 main body, which is the part of the metal pipe 10, and therefore prevents the terminal portion 16 from reaching a high temperature generated by the heating wire 12. Therefore, the durability of the heating wire heater 4 and thus the reliability of the heating device 1 can be improved.
　また、伝熱ブロック６には電熱線ヒータ４が複数収容されることにより、伝熱ブロック６、ひいては電熱線ヒータ４に対する熱媒体の伝熱時間及び伝熱面積を更に効果的に増大させることができ、加熱装置１の伝熱効率を更に高めることができる。
　更に、複数の電熱線ヒータ４の通電の有無を制御する通電制御を行うことにより、加熱装置１の通電回路２２を複数回路化して個別に通電することができるため、１つの通電回線２２が断線したとしても他の通電回路２２で加熱装置１を作動させることができる。しかも、加熱装置１の起動時に複数の端子部１６に段階的に通電することにより加熱装置１に対する突入電流を低減し、加熱装置１の過負荷トリップを防止することができるため、加熱装置１の信頼性を更に高めることができる。 Further, by accommodating a plurality of heating wire heaters 4 in the heat transfer block 6, it is possible to more effectively increase the heat transfer time and heat transfer area of the heat medium to the heat transfer block 6, and consequently the heating wire heater 4. The heat transfer efficiency of the heating device 1 can be further increased.
Further, by performing energization control for controlling whether or not the plurality of heating wire heaters 4 are energized, the energization circuit 22 of the heating device 1 can be made into a plurality of circuits and individually energized, so that one energization line 22 is disconnected. Even if it does, the heating apparatus 1 can be operated with the other electricity supply circuit 22. FIG. Moreover, since the inrush current to the heating device 1 can be reduced by energizing the plurality of terminal portions 16 in stages when the heating device 1 is started, an overload trip of the heating device 1 can be prevented. Reliability can be further increased.
　本発明は上述の実施例に制約されるものではなく、更に種々の変形が可能である。
　具体的には、本実施例の加熱装置１では、伝熱ブロック６及び挿入穴３６が鋳造により同時に形成されるが、伝熱ブロック６の成形方法は鋳造に限定されないし、挿入穴３６は伝熱ブロック６の形成後に切削加工などにより形成しても良い。 The present invention is not limited to the above-described embodiments, and various modifications can be made.
Specifically, in the heating device 1 of the present embodiment, the heat transfer block 6 and the insertion hole 36 are simultaneously formed by casting. However, the method of forming the heat transfer block 6 is not limited to casting, and the insertion hole 36 is not It may be formed by cutting or the like after the heat block 6 is formed.
　また、本実施例の加熱装置１では、伝熱ブロック６は直方体の外形をなしているが、これに限らず、例えば伝熱ブロック６を筒体の形状に合わせ減肉して形成すれば、加熱装置１の小型化及び軽量化を図れて好ましい。
　更に、本実施例の加熱装置１では、筒体３２は流通管２を螺旋状に巻回して形成されるが、空間３４を有する筒体３２であればこの巻回形状に限定されない。 Moreover, in the heating apparatus 1 of the present embodiment, the heat transfer block 6 has a rectangular parallelepiped outer shape, but is not limited thereto, for example, if the heat transfer block 6 is formed by reducing the thickness according to the shape of the cylindrical body, The heating device 1 is preferably reduced in size and weight.
Furthermore, in the heating apparatus 1 of the present embodiment, the cylindrical body 32 is formed by spirally winding the flow pipe 2, but the cylindrical body 32 having the space 34 is not limited to this winding shape.
　更にまた、本実施例の加熱装置１においては、伝熱ブロック６に４つの電熱線ヒータ４が収容されるが、４つに限らず複数であれば電熱線ヒータ４に対する上記通電制御が可能である。
　また、本実施例の加熱装置１に電熱線ヒータ４以外の発熱体を適用することもできるし、水以外の流体を熱媒体としても良い。但し、安価な汎用の電熱線ヒータ４を用いることで、加熱装置１の製造コストを低減することができるとともに、汎用の電熱線ヒータ４は一般に広く普及し信頼性も高いことから加熱装置１の信頼性を高めることができて好ましい。 Furthermore, in the heating device 1 of the present embodiment, four heating wire heaters 4 are accommodated in the heat transfer block 6, but not limited to four, the above-described energization control for the heating wire heater 4 is possible. is there.
In addition, a heating element other than the heating wire heater 4 can be applied to the heating device 1 of the present embodiment, or a fluid other than water may be used as the heating medium. However, by using an inexpensive general-purpose heating wire heater 4, the manufacturing cost of the heating device 1 can be reduced, and the general-purpose heating wire heater 4 is generally widespread and highly reliable. The reliability can be improved, which is preferable.
　更に、本実施例の加熱装置１を冷凍回路に設け、この冷凍回路をハイブリッド自動車や電気自動車の車両用空調装置に組み込むことにより、冷凍回路及び空調装置、ひいては上記車両の製造コストを低減することができて好ましい。また、加熱装置１を上記車両用空調装置の冷凍回路を循環する冷媒の熱源として利用するのみならず、他の用途の熱源としても利用可能であるのは勿論である。 Further, the heating device 1 of the present embodiment is provided in the refrigeration circuit, and the refrigeration circuit and the air conditioner and thus the manufacturing cost of the vehicle are reduced by incorporating the refrigeration circuit into the vehicle air conditioner of the hybrid vehicle or electric vehicle. Is preferable. Of course, the heating device 1 can be used not only as a heat source for the refrigerant circulating in the refrigeration circuit of the vehicle air conditioner but also as a heat source for other purposes.
　１　　加熱装置
　２　　流通管
　４　　電熱線ヒータ（発熱体）
　６　　伝熱ブロック（伝熱体）
　１６　端子部
　２６　ＥＣＵ（制御手段）
　２８　入口部
　３２　筒体
　３６　挿入穴 1 Heating device 2 Distribution pipe 4 Heating wire heater (heating element)
6 Heat transfer block (heat transfer body)
16 Terminal section 26 ECU (control means)
28 Entrance 32 Tube 36 Insertion hole

Claims (12)

  1. 　熱媒体が流通する一連の流通管と、
    　前記流通管を加熱する発熱体と、
    　前記流通管を埋設して前記流通管と一体に形成される伝熱体とを備え、
    　前記伝熱体は、前記発熱体を収納する挿入穴を有することを特徴とする加熱装置。     A series of distribution pipes through which the heat medium circulates;
    A heating element for heating the flow pipe;
    A heat transfer body embedded in the flow pipe and integrally formed with the flow pipe,
    The heating device, wherein the heat transfer body has an insertion hole for housing the heating element.
  2. 　前記流通管を巻回して形成した筒体を前記伝熱体に埋設することを特徴とする請求項１に記載の加熱装置。 The heating apparatus according to claim 1, wherein a cylindrical body formed by winding the flow pipe is embedded in the heat transfer body.
  3. 　前記筒体の巻回方向の長さは前記発熱体の前記挿入穴への挿入長さと略同一であることを特徴とする請求項２に記載の加熱装置。 The heating apparatus according to claim 2, wherein a length of the cylindrical body in the winding direction is substantially the same as an insertion length of the heating element into the insertion hole.
  4. 　前記挿入穴は前記筒体の内側に位置して設けられることを特徴とする請求項２又は３に記載の加熱装置。 The heating device according to claim 2 or 3, wherein the insertion hole is provided inside the cylindrical body.
  5. 　前記筒体は前記流通管を螺旋状に巻回して形成されることを特徴とする請求項２～４の何れかに記載の加熱装置。 The heating apparatus according to any one of claims 2 to 4, wherein the cylindrical body is formed by spirally winding the flow pipe.
  6. 　前記伝熱体は前記流通管を金属に鋳込んで埋設し一体に形成した伝熱ブロックであり、　前記挿入穴は前記伝熱ブロックの鋳造時に形成されることを特徴とする請求項１～５の何れかに記載の加熱装置。 The heat transfer body is a heat transfer block formed integrally by embedding the flow pipe into a metal, and the insertion hole is formed when the heat transfer block is cast. The heating apparatus in any one of.
  7. 　前記発熱体は、前記発熱体を発熱させるべく通電される端子部を一端に有し、
    　前記流通管は、前記端子部側に前記熱媒体の入口部を有することを特徴とする請求項１～６の何れかに記載の加熱装置。     The heating element has a terminal portion that is energized to heat the heating element at one end,
    The heating device according to any one of claims 1 to 6, wherein the flow pipe has an inlet portion for the heat medium on the terminal portion side.
  8. 　前記伝熱体には複数の前記発熱体が収容されることを特徴とする請求項１～７の何れかに記載の加熱装置。 The heating apparatus according to any one of claims 1 to 7, wherein a plurality of the heating elements are accommodated in the heat transfer body.
  9. 　前記発熱体は、前記発熱体を発熱させるべく通電される端子部を一端に有し、
    　複数の前記発熱体のうちの各々または複数群の前記端子部に対する通電を制御する制御手段を備えることを特徴とする請求項８に記載の加熱装置。     The heating element has a terminal portion that is energized to heat the heating element at one end,
    The heating apparatus according to claim 8, further comprising a control unit that controls energization of each of the plurality of heating elements or a plurality of the terminal portions.
  10.  　前記発熱体は電熱線ヒータであることを特徴とする請求項１～９の何れかに記載の加熱装置。 The heating device according to claim 1, wherein the heating element is a heating wire heater.
  11. 　前記熱媒体は冷凍回路を循環する冷媒を加熱することを特徴とする請求項１～１０の何れかに記載の加熱装置。 11. The heating apparatus according to claim 1, wherein the heat medium heats a refrigerant circulating in the refrigeration circuit.
  12. 　前記冷凍回路は車両の空調装置に設けられることを特徴とする請求項１１に記載の加熱装置。 The heating apparatus according to claim 11, wherein the refrigeration circuit is provided in an air conditioner of a vehicle.
PCT/JP2011/000110 2010-01-13 2011-01-13 Heating device WO2011086910A1 (en)

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ITVI20120234A1 (en) * 2012-09-24 2014-03-25 Ht S P A PROCEDURE FOR THE CONSTRUCTION OF HEATING ELEMENTS USING ELECTRIC RESISTORS
CN108027167A (en) * 2015-09-09 2018-05-11 康奈可关精株式会社 Fluid heater and its manufacture method
WO2018172387A1 (en) * 2017-03-23 2018-09-27 Webasto SE Electric heater
WO2019002492A1 (en) * 2017-06-30 2019-01-03 Zoneox Medical Aps An apparatus and a method of affecting a parameter of a fluid

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JP6029850B2 (en) * 2012-05-10 2016-11-24 サンデンホールディングス株式会社 Heating device
EP3019795A1 (en) * 2013-07-09 2016-05-18 Cast Aluminum Solutions, LLC Circulation heater
FR3012872B1 (en) * 2013-11-07 2015-11-13 Valeo Systemes Thermiques ELECTRIC FLUID HEAT CONDITIONING DEVICE FOR MOTOR VEHICLE, AND HEATING AND / OR AIR CONDITIONING APPARATUS THEREFOR

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WO2018172387A1 (en) * 2017-03-23 2018-09-27 Webasto SE Electric heater
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