Coolant heater for ice with built-in electrically driven pump

FIELD: engines and pumps.

SUBSTANCE: proposed heater comprises housing with coolant feed and discharge channels and cover tightly coupled with said housing, tubular electrical heater secured therein and motor-drive rotary pump Impeller is fitted on pump rotor shaft inside aforesaid housing Note here that said rotary pump is provided with jacket fitted in heater housing with secured by its one end in the latter in inlet channel zone Its opposite end is secured at housing cover in the area of rotor shaft with impeller exit so that said impeller is located inside aforesaid jacket Note here that said jacket in impeller zone has openings to communicate the jacket inside with heater housing inside Motor rotor is enclosed in cup-like case closed by cup cover on cover outer side and secured at cover inner side Note here that rotor shaft section with impeller fitted thereon extends through cup cover and heater housing cover inside the housing Tubular heater is composed of helical coil arranged around said jacket above its openings and secured at heater housing cover Coolant feed channel, pump jacket and rotor shaft with impeller are aligned.

EFFECT: higher efficiency, electric power saving.

11 cl, 5 dwg

 

The invention relates to devices to facilitate the launch of automotive internal combustion engines (ice) at low temperatures in the winter period of operation due to the pre-heating of the coolant.

Known various devices for facilitating the starting of internal combustion engines due to the preliminary heating of the coolant without forced circulation. In particular, these devices include a utility model RU 57838 U1; EN 76685 U1; EN 84921 U1 and the invention EN 2206785. These devices contain a housing with inlet and outlet channels and placed in the inner cavity of the housing of the electric heating element with means for connection with a power source and thermostat.

Such devices may not provide uniform and fast heating of the engine, with possible overheating of the tubular heaters.

Also known device to facilitate starting of the internal combustion engine with forced circulation of coolant.

The utility model PRC CN 202039999 (Y), published on 16.11.2011, described the car heater, which comprises a hollow body, connected by inlet and outlet pipes with the cooling system of an internal combustion engine, an electric pump, the rotating impeller located within the heating chamber, which also set�flax heating block, and thermostat. Shell body made of aluminum alloy with heat-insulating coating; input and output connections are located respectively on the left and right sides of the body and molded integrally with the housing. The electric pump is located on the left side of the heating chamber on a carrier plate, attached to the upper heating chamber and formed with a groove on the right side; the heating unit is secured below the carrier plate, wherein thermostat is installed in the groove in the right side of the carrier plate at a distance from the bottom of the heating block.

In the utility model of the Russian Federation RU 129566 U1, published 27.06.2013 described automotive electric heater, comprising a hollow body, provided with a cover connected through inlet and outlet ports with the cooling system of an internal combustion engine, the electric heating element mounted in the heating chamber of the housing. In the heating chamber of the heater installed as a means of ensuring forced circulation of the liquid, which is a pump or impeller coupled to an electric motor.

Furthermore, the known heater coolant for car (utility model PRC CN 2639549 (Y), Fig. 2, publ. 08.09.2004), which contains the lower case with lower�th stove, top case mounted on the lower housing; a feed pipe of the liquid and the outgoing pipe of the liquid located on the upper housing; an electric heater is disposed in the upper housing; an electric pump located in the lower housing; an output shaft of the electric motor of the pump connected to the inlet pipe in the upper housing via a sealing ring and is provided with vanes that provide forced circulation of the coolant.

The closest analogue (prototype) of the claimed technical solution is a utility model PRC CN 201078303 (Y), which describes the electric heater for a motor vehicle, comprising a hollow body, connected by inlet and outlet pipes with the cooling system of the internal combustion engine. Electric heating element installed in the body cavity, in addition, in the cavity of the housing has a means for providing forced circulation of the liquid in the form of an impeller connected to the motor. The electrical heater is made detachable and is closed by the bottom lid. The impeller, providing forced circulation of the liquid cooling system of the vehicle, is installed near the inlet of the housing of the heater.

The above analogues, including the closest analogue, do not provide enough�th performance, since coming to the outlet nozzle coolant mixed coolant with lower temperature is supplied to the inlet pipe. This is because the mixing of the fluid supplied by the inlet pipe and the fluid moving out of the housing of the heater.

The problem solved by the invention is to improve the efficiency of the heater due to a more rapid and uniform heating of the coolant (and therefore faster heating of the engine) with the exception of overheating of the heating element of the heater.

In common with the closest analogue of the following signs are essential features of the invention: the presence of a housing with inlet and outlet channels for coolant and a cover hermetically connected to the casing and tubular heaters (heater) mounted inside the cavity of the housing and the centrifugal pump formed by the motor, the rotor shaft which is mounted the impeller, located inside the body cavity, wherein the rotor is a permanent magnet.

The task of the claimed invention is solved due to the fact that the centrifugal pump provided with a casing mounted in the housing and fixed at one end in the slot of the housing of the heater in the zone �exhaust channel, and the other one on the cover of the housing in the discharge area of the rotor shaft with the impeller so that the impeller is located inside the casing, and the casing in the zone of the impeller is made with openings, informing the cavity of the housing with the cavity of the housing of the heater. The cover is kind of shaped tube formed from two interconnected parts of different diameter portion with a smaller diameter, located from the inlet channel and extending into the area of the spiral tubular heaters, and parts of a larger diameter, located in the zone of the impeller, and the openings made in the casing in the portion of the tube of larger diameter. The rotor of the motor is enclosed in a housing in the form of glass, closed by a cover glass located on the outside of the housing cover of the heater and is fixed with its inner side, with part of the rotor shaft with a fixed impeller is passed through the cover glass and the housing cover on the heater in the cavity of the housing, and a tubular heater in the form of a cylindrical helix is located above the openings of the casing mainly coaxially him, i.e. around the casing without contact, wherein electrotek heater is located on the outside of the heater cover and closed by electrical cover. In electroteque heater is placed a stator of an electric motor with two coils and therm�controller, latching protrusions in the plastic cover that covers electrotek and connectors tubular heaters and power feeds. The inlet channel for the cooling fluid, the casing of the centrifugal pump and the rotor shaft with the impeller arranged coaxially, and the outlet channel is located in the body portion near the inlet channel. Also coaxially these elements can be tubular heater. The body of the heater and its cast cover is made of aluminum alloy, the tubular heater pressed with steel bushings in the lid of the heater, wherein the connection housing of the heater with its lid sealed with a rubber o-ring disposed in a rectangular annular groove of the housing of the heater.

The body of the rotor of the electric motor in the form of a plastic Cup attached to the center of the lid of the heater in the bore and is sealed by the lid heater rubber ring of circular cross section, and relative to the housing cover heater glass fixed clamping plate with two screws. The power of the heater is conducted through the cord with reformovanii plug with earthing contact and the absorber side cover Electrotech.

The technical result from the use of the invention is polystyerene heater work due to the faster heating of the pumped fluid with less energy consumption, due to, first, the layout of the heater, and second, design of a centrifugal pump. The layout of the heater, providing increase of efficiency of its work, characterized by a coaxial arrangement of the inlet channel, the casing of the centrifugal pump and the shaft of the rotor with the impeller, and installation of Heaters around the casing of a centrifugal pump with a gap relative to him. More rapid heating of the liquid with less energy also contributes to the fact that the rotor of the motor is placed in a Cup attached to the lid of the heater, and removed out of the case in electrotec. This reduces heat loss by heating of the rotor when starting the heater, as a glass (rotor housing) is outside the fluid flow and this does not create additional resistance to the flow of the heated liquid. The glass is sealed to the housing cover, thereby creating a common sealed cavity of the housing of the heater and the glass, and thus the cooling liquid from the body cavity of the heater can do the inside of the Cup and to perform the function of lubrication for the rotor. Conclusion of Electrotech heater out of the case and placing it in all of the above elements also contributes to more efficient operation of the heater.

Centrifugal pumps built into the building� heater, as the closest analogue, provides a continuous forced circulation of the coolant in the heater and supply it to the engine in the process of warming or heating. However, in the inventive heater efficiency heating higher due to the improved design of a centrifugal pump in combination with the proposed layout of the heater. Introduction to the design of centrifugal pump casing, forming a channel for flow of coolant and installed in the case, as described above, as well as installation of the heating element so that it covers the casing of tubular shape and is located with a gap relative to him, that accounts for the effective operation of the heater by pumping a cold fluid from the inlet channel through the openings of the casing near the body cover, heater, feed on her tan and uniform flow around the heating element, resulting in an exit located above the heating element is warmed up liquid, not miscible with cold liquid entering the inlet of the heater. Higher efficiency of the claimed heater when this is achieved also due to the fact that the flow of cold fluid to flow through the casing from the inlet duct to the openings of the pre-heated through the wall of the casing warmer liquid in contact with the heating element, i.e. at the outlet from the casing post� - release liquid, with a higher temperature than at the inlet in the housing of the heater. Pre-heating a fluid flowing inside the housing, allows a more efficient use of the energy of PETN spent on heating of the fluid, which then enters the outlet duct positioned near the inlet channel. Furthermore, due to the above essential features of the heating element will always be washed with coolant, which prevents overheating and increases its service life. Additional technical result is achieved by the totality of essential features of heater is that it can be located in any convenient position in the engine compartment of the vehicle and in any position. The only restriction is that the heater must not be located above the "min" mark in the expansion tank of the cooling system.

The invention is illustrated by drawings, which depict:

Fig. 1 and Fig. 2 - General view of the heater Assembly.

Fig. 3 - heater is broken.

Fig. 4 - casing centrifugal pump heater.

Fig.5 is bottom view of the slit of the cover.

Positions indicated on drawings:

1 - power cord assy; 2 - electric motor rotor; 3 - inlet fitting; 4 - outlet; 5 - output heating element; 6 - thermostat; 7 - the housing of the heater; 8 - casing centrifugal pump�tion of the pump; 9 - Cup (rotor housing); 10 - cover glass (of the rotor housing); 11 - impeller; 12 - stator; 13 - stator coil; 14 - o-ring glass; 15 - pressure plate; 16 - o-ring heater housing; 17 - cover Electrotech; 18 - housing cover heater; 19 is a tubular heater.

Electric heater consists of a cast aluminum housing 7. The housing 7 is closed by the bottom cover 18 is also made of aluminum alloy. The housing 7 is formed with an inlet 3 and outlet 4 fittings for the coolant connected respectively with inlet and outlet channels of the housing 7.

Inside the housing 7 is a tubular electric heater (heater) 19 having the shape of a cylindrical spiral. PETN pressed with steel sleeves in the aluminum housing cover heater. The connection of the housing 7 with the lid 18 of the heater sealed with a rubber ring 16 of circular cross-section disposed in a rectangular annular groove of the housing 7. In the center of the lid 18 of the heater installed in the boring plastic Cup with lid 9 Cup 10 are condensed on the lid 18 of the heater rubber ring 14 of circular cross-section. Inside the plastic Cup 9 is placed a rotor 2 of an electric motor constituting a permanent magnet. The Cup 9 is fixed on the lid 18 of the clamping plate 15 with two screws.

Centrales�th pump is formed by the casing 8 in the form of a shaped tube, inserted into the slot of the housing 7 of the heater in the zone of the inlet channel, and an impeller 11 mounted on a shaft of the rotor 2. The casing 8 in the form of a shaped tube is formed from two interconnected parts of different diameter portion with a smaller diameter, located from the inlet channel and extending into the area of the spiral tubular heater 19, and the portion of larger diameter, located in the zone of the impeller 11. In the part of the casing of larger diameter openings made to ensure that when the impeller 11, the flow of fluid from the cavity of the casing 8 into the cavity of the housing 7.

On the outer side of the cover 18 of the casing of the heater is the stator 12 of the motor with two coils 13 and thermostat 6, the latching protrusions in the plastic cover 17 Elektroonika, which closed electrotek. The housing 7, the housing cover 18 and cover Electrotech 17 tightened the four bolts with nuts.

The power of the heater is conducted through the cord with 1 reformovanii plug with earthing contact and the absorber side cover 17 Electrotech excluding a fracture of the cord in the opening of the cover.

Heater operation automotive coolant of the internal combustion engine with an integrated electric pump is as follows.

A heater mounted in the engine compartment of automobiles,�Il, through cord 1 with the plug connected to the electrical network. This enables the engine to the rotor shaft 2 of which is connected to the impeller 11, and the resistor 19.

Coolant (antifreeze) is pumped by the impeller 11 of the centrifugal pump from the inlet fitting 3 via the inlet channel of the housing 7 through the lumen of the tubular casing 8 to the openings in the casing 8, located near the lid 18 of the housing 7, and out of the openings. As the passage of fluid through the casing 8, it is heated casing surrounding the liquid that has already been heated by the heating element 19. Therefore, from the openings of the casing, the fluid flows out of the already pre-heated.

Next, the heated directly by the heating element 19, the fluid flows out through the outlet channel of the housing and an outlet fitting 4 to the cooling system of the engine.

1. Heater coolant automotive engine, comprising a housing with inlet and outlet channels for coolant and a cover hermetically connected to the housing, a tubular heater mounted within the housing cavity and centrifugal pump motor, to the rotor shaft which is mounted the impeller, located inside the body cavity, characterized in that the centrifugal pump provided with a casing mounted in the housing of the heater and fixed at one end in the housing of the heater in the zone of the inlet Cana�and, and the other is associated with the housing cover in the zone of exit of the rotor shaft with the impeller so that the impeller is located inside the casing, and the casing in the zone of the impeller is made with openings, informing the cavity of the housing with the cavity of the housing of the heater, the motor rotor is enclosed in a housing in the form of a Cup, located on the outside of the cover and is attached to the lid, wherein the shaft of the rotor with impeller is omitted in the body cavity, and a tubular heater in the form of a cylindrical spiral is their coils around the casing above the openings of the casing, the inlet channel for the cooling liquid, the casing of the centrifugal pump and the rotor shaft with the impeller arranged coaxially.

2. The heater according to claim 1, characterized in that the housing and the cover heater is made with cast aluminum alloy.

3. The heater according to claim 1, characterized in that electrotek heater is located on the outside of the heater cover and closed by the electrical cover, and a tubular heater pressed into the lid of the heater through steel sleeves.

4. The heater according to claim 1, characterized in that the connection of the housing with the lid of the heater sealed with a rubber o-ring disposed in a rectangular annular groove of the housing of the heater.

5. The heater according to claim 1, characterized in, h�about the body of the rotor of the electric motor in the form of glass fixed in the center of the lid of the heater in the bore and is sealed by the lid heater rubber ring of circular cross-section, moreover, with respect to the housing cover heater glass fixed clamping plate with two screws.

6. The heater according to claim 5, characterized in that the rotor housing of the electric motor in the form of a Cup made of plastic.

7. The heater according to claim 1, characterized in that the rotor of the electric motor is a permanent magnet.

8. The heater according to claim 1, characterized in that in electroteque heater is placed a stator of an electric motor with two coils and thermostat, fixed protrusions in the plastic cover that covers electrotek and connectors tubular heaters and power supply.

9. The heater according to claim 1, characterized in that the inner side of the heater housing in the area of the inlet channel is made a nest under the shroud of a centrifugal pump

10. The heater according to claim 1, characterized in that the power of the heater is conducted through the cord with reformovanii plug with earthing contact and the absorber side of the cover.

11. The heater according to claim 1, characterized in that the cover is the form of a tube formed from two interconnected parts of different diameter portion with a smaller diameter, located from the inlet channel and extending into the area of the spiral tubular heaters, and parts of a larger diameter�tra, located in the zone of the impeller, and the openings made in the casing in the portion of the tube of larger diameter.



 

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