TR201903164A2 - ONE PTC HEATING UNIT - Google Patents

Abstract

The present invention, in its most basic form, consists of a body (4) to be placed in an air duct, at least one thermal grease (7) positioned on the body (4), at least one PTC (8) placed on the thermal grease (7). At least one strip (9) placed on the PTC (8) and providing electrical conductivity, Nano-Graphene Platelets / Particles coated on the body (4), at least one mixture material (10) placed on the strip (9). It is related to the PTC heating unit (1).

Description

DESCRIPTION ONE PTC HEATING UNIT Technical Area This invention is with a PTC heating unit that provides heating of the cabin environment for vehicles. Prior Art As the temperature increases, the resistance values increase and decrease the current they pass through. elements are called PTC. In other words, with the increase in heat, the resistance decreases. An electronic circuit element that allows the increase of PTCs -60 They can work stably at temperatures between degrees and +150 degrees. 0.1 There are those who have a degree of sensitivity. More electric motors They are used in circuits designed to protect against overheating. Also heat In all transactions that must keep the level within a certain value range, all used in circuits. Conventional in the state of the art heat loss application technique/method and used in solutions/systems material is too much. In the document, the surface with the coexistence of multiple PCT bars A PCT design with increased area is mentioned. Multiple PCTs Using the bar allows a certain volume of media to be removed more per unit time. More mechanical surfaces are needed to heat up. This situation It brings an additional weight and cost on the mechanical surface.

In the patent document numbered U85256857A, which is in the state of the art, to be used as passenger compartment heater or similar for automotive applications There is mention of a heater specially adapted for The heater in question It has an apertured housing and has a large number of heat exchanger blade elements and self-regulating electrical with built-in positive temperature coefficient (PTC) It has resistance heating discs. PTC to increase heat transfer inside the enclosure a thermally conductive oil between the heater discs and the blade elements. is placed. However, in the system in question, applying heat losses Technique/method and material used are required, this situation requires a certain In order to heat the medium in the volume more in unit time, more mechanical surface is needed. This situation creates an additional weight and cost on the mechanical surface. brings.

Problems Solved with Invention The aim of this invention is to achieve high efficiency by providing less heat loss for vehicles. to realize a PTC heating unit.

The other object of this invention is to provide a specific A PTC heating system that enables it to heat the medium in volume more in unit time. to perform the unit.

Detailed Description of the Invention To achieve the aim of this invention, a PTC heating unit realized, attached shown in the figures and these figures; Figure 1. Exploded perspective view of the PTC heater.

Figure 2. Perspective view of the PTC heater.

Figure 3. The top view of the PTC heater.

Figure 4. The view of section A-A.

The parts in the figures are numbered one by one and the corresponding numbers are given below.

PTC heating unit Top cover electronic control unit negative link Bottom cover thermal grease PTC (Positive coefficient thermistor) . Blend material A PTC heating unit (1), which provides heating of the environment for vehicles, in its most basic form, - at least one body (4) positioned on the top cover (2), - at least one thermal grease (7) positioned on the body (4), - at least one PTC (8), placed on thermal grease (7), - At least one strip (9) placed on the PTC (8) and providing electrical conductivity, - at least one mixing material (10) placed on the strip (9) contains.

The PTC heating unit (1), which is the subject of the invention, is an upper unit placed in an air duct. It has a cover (2). A control unit (3) inside the top cover (2) is positioned. Connection cables extend over the top cover (2).

In addition, a body (4) is positioned on the upper cover (2) and the body (4) It is made of aluminum. In a preferred embodiment of the invention, the body (4) placed in the air duct. The body (4) is in the form of a flat plate and It consists of fins extending parallel to each other on the plate.

A hole is placed on the body (4) and between the two furnaces positioned on the body (4). negative connection (5) is inserted. A lower cover (6) on the body (4) is connected. Connection cables extend over the lower cover (6). Body (4) A thermal grease (7) is placed between the two ovens on it. thermal grease A PTC (8) is placed on (7). Preferably made of copper on PTC (8) A strip (9) is placed. A mixture material (10) on strip (9) is placed.

The current from the energy source is first transmitted to the body (4) and from the body (4), The conducted current is first applied to the thermal grease (7) and from the thermal grease (7) to the PCT (8). passes. There is a strip (9) on the PCT (8) and the current is together with the strip (9). it goes back to the energy source. With current flowing through the PCT (8) is warming up. PTC (8), PTC heating unit (l), as a heat source inside is used. PTC (8)'s have two non-polar energy poles.

One of the flat surfaces of the PTC (8) which preferably has a rectangular shape one pole forms the other flat surface and another pole. Find your choice In a preferred embodiment, the PTC 8 may have an oval or square shape. PTC (8), When the heat accumulated on it exceeds a certain value, it increases their internal resistance. they have difficulty in passing the electric current over them and they it drops this way. PTC (8), which can adjust themselves thermally materials and are known as positive coefficient thermistors. is named. A body (4) in the form of a flat plate is positioned on the upper cover (2).

The body (4) is preferably made of aluminum since it is light and has high thermal conductivity. It is made of material. Better blow the heat onto the body (4). At least one hole has been drilled so that it can transmit. The task of the hole is the two surfaces of the body (2) (front, rear) is to stabilize/reduce the pressure. plate-shaped By placing two fins parallel to each other on the body (4), a channel is created. In a preferred embodiment of the invention, it is placed on the body (4). a channel is opened. The body (4) is placed in an air duct. Body (4), Thanks to the air flow flowing over it, the surface heat is transferred to the environment to be heated. transmits.

To minimize the heat loss on the body (4) and to increase the heat transfer Nano-Graphene Platelets/Particles are coated on the body (4). Nano- Graphene The graphene structure of Platelets/Particles is a 2-dimensional It consists of carbon array and has a high electrical and thermal conductivity. material. In addition, Nano-Graphene Platelets/Particles are very light and strong. it has a leaf. Surface given about Nano-Graphene Platelets information reaches up to ~2675m2/g. thermal conductivity on the other hand, it can be about 5300 W/(m.K). Graphene platelets They are nano-sized, typically 0.34 - 100 nm thick, and lengths and 0.3-10 μm.

Nano-Graphene Platelets/Particulate coating applied on the body (4) Thanks to this, the heat generated on the PTCs (8) is first made of aluminum. transferred to the body (4), then thanks to the Graphene surface coating is transferred to the air. In other words, only Nano- Graphene is Platelets/Particulate coating. Made of aluminum material The entire surface of the body (4) is made of Nano-Graphene, preferably with a thickness of 30urii. The surface area is reserved by coating with Platelets/Particulate coating and The resulting heat is released into the air more quickly over a larger surface (Graphene thanks to its high thermal conductivity) transfer / transmission is provided. Body (4) Nano-Graphene Platelets/Particulate coating applied on high It provides planar electrical conductivity of 220,000 S/cm. Also gas superior resistance to permeability and dispersibility in many polymers and solvents it provides. To explain in more detail, the applied to the body (4) Nano-Graphene Platelets/Particulate coating increases the surface area and it also provides high thermal conductivity coefficient. In this way, PTC The heat produced by the heating unit (l) is faster and the air flow is reduced with minimum loss. It is transported to the environment desired to be heated and increases the efficiency of the heater system positively. exhibits an impressive effect.

Before the PTC (8) is placed between the two furnaces on the body (4), the body (4) Thermal grease (7) into the channels formed by the fins on it. is being implemented. With the PTC (8), thanks to the thermal grease (7) placed between the fins. air gaps that may occur between the body (4) due to surface roughness is disappearing. In a preferred embodiment of the invention, thermal grease (7), It is applied on the PTC (8) and thus acts as a positive (+) terminal. sees. Thermal grease (7), PTC (8) “positive (+) on the body (4) After the terminal placement on the surface is completed, the duct on the body (4) on the mixture material (10) and PTC (8) to be used in the filling. between the strip (9) surfaces, preferably made of copper material, applied It is used as a barrier to prevent leakage/leakage. Find your choice In one embodiment, the strip (9) consists of metal/alloys with conductivity. has arrived. As thermal grease (7), silver Ice 710 (Electrically & Thermally Conductive Grease) or black Ice 713 (High Temperature Stable-Electrically & Thermally Conductive Putty) or silver Ice 720 (Electrically & Thermally Conductive Grease) is used. Thermal grease (7), electrically and thermally The conductive grease/paste material is a non-curing, high-viscosity is the material. Thermal grease (7), both thermally and electrically It is a material that provides a bridge and acts as a bridge. High temperature resistance, low It has electrical resistance, non-drying and reshaped structure. Thermal thermal and electrical with grease (7), Carbon-Graphite or silver additives/particles It consists of material that provides transmission. In addition, thermal grease (7), high It is a material that maintains its stability at temperatures (such as 360°C) and silicone does not include. By filling low pressure and large cavities, electrical and It is used to enable thermal conduction.

A mixture material (10) is placed on the strip (9). Blend material (10) as hexagonal boron nitride (h-BN - Hexagonal Boron Nitride Powder) and matrix material is used. In a preferred embodiment of the invention, the mixture aluminum Nitride together with the matrix material in the material (`10) (AIN) or aluminum oxide (AL203) or Zinc Oxide (ZnO) or Magnesium Oxide (MgO) is used. Hexagonal boron nitride has high corrosion resistance, It is a white colored (ceramic structured) fabric with electrical and thermal properties. is the substance. Hexagonal boron nitride, which has a structure similar to that of carbon, is white. It is called carbon or white graphite. Hexagonal boron nitride, electrically insulator, low dielectric constant, high temperature stability, high thermal conductivity, inert ie chemically inactive/with no substance It has a non-reactive structure. Mixture material (10), hexagonal boron Low thermal expansion with high thermal conductivity and Tg threshold temperature with nitride coefficient, low shrinkage rate, strong adhesion properties, low viscosity together with a matrix material that is single or bi-component epoxy/resin. It is used to form composites. Invent a preferred In the application, without boron nitride, only the high coefficient of thermal conductivity using a single type of epoxy/resin (double or single component) (PTC's) as adhesive and filling material) are used.

The mixture material (10) is placed on the body (4) of the PTCs (8) after it has cured. It provides fixing and keeping the PTC (8) and the strip (9) together. Mixture The matrix material in the material (10) has high thermal conductivity and Tg threshold temperature, low coefficient of thermal expansion, low shrinkage rate, strong Low viscosity one or two component epoxy/resin with adhesion properties used. With the matrix material contained in the mixture material (10) some binder and catalyst by mixing the h-BN particles (preferably 10 µm) together. related chemicals by providing curing and particle surface composition/fusing. the mixture is cured at a certain temperature. The result obtained is high in composition It provides thermal conductivity, durability (heat, mechanical force, etc.). Mixture material (10), the heat source PTC (8) and the body (4) are monolithic and air It ensures the establishment of a gapless heat bridge.

The mixture material (10) consists of the fins on the body (4) where the PTC (8) is placed. between the channel it creates and on the strip (9) with positive (+) polarity. to fill the duct and thus remove the air gaps inside the duct It is used to minimize losses. Also, mix body (4) thanks to the high thermal conductivity of the material (10) transferring the heat of the PTC (8) on it faster and electrically isolating it is used for the purpose.

Control unit (3), the controlling/managing power inside the PCT heating unit (l) electronics and embedded software algorithms and all of the system adapted to manage its functions. located in the control unit (3) Thanks to the existing embedded software, the necessary control procedures are carried out and thus, it can realize the best efficiency and functional reliability in the product.

The most optimized heat thanks to the algorithms that work according to the situations that occur. proportionality of the current states of the efficiency, remote monitoring and PTC (8) components. energy on the heater units with the control (PWM Pulse Width Modulation) saving (operation at the required power), fault diagnosis mechanisms management is provided. A built-in control unit (3) Information and control option to other units thanks to communication network (CAN/LIN) adapted to present. Also electronic control unit (3), PTC (8) To monitor the temperatures of its components, preferably a PCT (8). the temperature sensor is located and the temperature sensor in question is connected to the PCT (8). In case of any uncontrolled change/problem by monitoring the temperature conditions, the relevant It can report errors to external units and quickly solve the problem. constitutes an advantage. In addition, this option provides closed loop control. (Example: Using the PID algorithm). Inside the electronic control unit (3) PTC heating unit according to different needs (time, power, etc.) with created software (1) is applicable.

In a preferred embodiment of the invention, the temperature on the outdoor and/or indoor environment sensors are built in, Control unit to control the temperature sensors (3) adapted. According to the status received from the control unit (3) temperature sensors The best comfort to the heated environment with the adaptation algorithms in it. provision is planned.

An MCU/CPU central processing unit on the control unit (3), advanced a protected electronic switch (HS) 3 x MOSFET units, a CAN/LIN communication unit, preferably an analog input unit, a PSU power supply unit system without the need, thanks to the CAN/LIN communication network. 15 different profiles defined/programmed inside can be operated.

Claims (20)

REQUESTS . In its most basic form for vehicles, a body (4) for insertion into an air duct, at least one thermal grease (7) positioned on the body (4), at least one PTC (8), PTC () placed on thermal grease (7) A mixture of hexagonal boron nitride and matrix material (Nano-Graphene Platelets/Particles) placed on 8) and containing at least one strip (9) providing electrical conductivity and coated on the body (4) - placed on the strip (9). 10) a PTC heating characterized by . A PTC heating unit (1) as in Claim 1, comprising at least one top cover (2) for insertion into an air duct. . A PTC heating unit (1) as in Claim 2, comprising a control unit (3) positioned on the top cover (2). . A PTC heating unit (1) as in Claim 1, comprising at least one body (4) in the form of a flat plate and consisting of fins extending parallel to each other on the plate. . A PTC heating as in Claim 1, which includes a channel opened on the body (4). A PTC heater as in claim 1, comprising a body (4) made of aluminum. A PTC heating unit as in Claim 1, comprising a strip (9) made of copper. A PTC heating unit (l) as in Claim 1, containing at least one hole drilled on the body (4) to better transmit the heat to the air. A PTC heating unit (1) as in Claim 4, comprising at least one negative connection (5) placed between two furnaces on the body (4). A PTC heating unit (l) as in Claim 1, containing nano-graphene platelets with nano dimensions, typically thicknesses of 0.34 - 100 nm, and lengths of 0.3 - 10 µm. A PTC heating unit (1) as in Claim 1, containing thermal grease (7) applied on the PTC (8). A PTC heating unit (1) as in claim 1, which includes the use of silver Ice 710 (Electrically 8; Thermally Conductive Grease) as the thermal grease (7). A PTC heating unit (l) as in claim 1, which includes the use of black Ice 713 (High Temperature Stable-Electrically & Thermally Conductive Putty) as the thermal grease (7). A PTC heating unit (1) as in the request, which includes the use of silver Ice 720 (Electrically 8 (Thermally Conductive Grease)) as the thermal grease (7). A PTC heating unit (1) as in Claim 3, comprising a communication network placed on the control unit (3). A PTC heating unit (1) as in claim 3, comprising a temperature sensor placed on/on the PCT (8). A PTC heating unit (l) as in Claim 1, containing a mixture material (10) consisting of Magnesium Oxide (MgO) and matrix material. 18. A PTC heating unit (l) as in Claim 1, comprising a mixture material (10) consisting of Zinc Oxide (ZnO) and matrix material. 19. A PTC heating unit (l) as in claim 1, comprising a mixture material (10) composed of aluminum oxide (AL203) and matrix material. 20. A PTC heating unit (l) as in claim 1, comprising a mixture material (10) composed of Aluminum Nitride (AIN) and matrix material.