JPS61244616A - Device for heating compartment for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention relates to a heating device according to the generic concept of claim 1.

BACKGROUND OF THE INVENTION Heating systems are known which act on a closed valve when a continuously operating coolant pump interrupts the liquid passage through a heat exchanger by closing the valve. The pressure peaks that occur immediately after closure load the individual components of the heating device.

Structure of the invention: Unlike the known technology, the heating device of the present invention having the features of claim 1 includes a detour to the coolant circuit by interrupting the coolant passage through the heat exchanger. It has the advantage that pressure peaks do not occur. The individual components of the heating device, such as heat exchangers, conduits and hoses, etc., are weak and can therefore be chosen to have inexpensive dimensions.

The heating device according to claim 1 can be advantageously constructed and improved by the measures according to claims 2 to 6.

Embodiment 2 The heating device shown in FIG. 1 is an internal combustion engine 10 equipped with a cooling system.
has. (c) The heat generated in the internal combustion engine 10 is removed by a coolant flowing through the conduit system.

The conduit system includes a heating branch 12 with a heat exchanger 14 . The heating branch 12 includes a valve 16 which can be actuated by an electromagnet 18.
It ends in The transport conduit 2 further has a cooler 22 in the valve 16.
0 is connected and the excess heat of the coolant is extracted with this cooler. The reflux conduit 24, which connects to the cooler 22, has a transport pump 26 that serves to circulate the coolant. The transport pump 26 is always forcedly driven during operation of the internal combustion engine 10. Coolant is transported through the system in the direction of arrow 28. The cooling liquid flows through a heat exchanger 14 in which the air which is fed into the passenger compartment (not shown) is heated. The liquid then passes through valve 16 and transport conduit 20 to cooler 22 where further heat is extracted from the liquid. Finally, the appropriately cooled coolant is again sent to the cooling system located inside the engine housing. Connected in the flow direction (arrow 28) to the heating branch 12 before the heat exchanger 14 is a bypass 30 which likewise leads to the valve 16.

The formation of the valve 16 is clearly apparent from FIG. 2. The valve has a casing 32 in which the electromagnet 18 is housed.

The anchor 34 of the electromagnet 18 is fixedly connected to a rod-like member 36 which emerges from the electromagnet 18 and projects into the valve chamber 38 .

It has six connecting pipes 40° 4.2 and 44 connected to the valve 16/li coolant circuit. A heating branch 12 is connected to a first connecting pipe 40 of the valve 16 . The detour 30 is the second connecting pipe 4
2, and the third connecting pipe 44 of the valve 16 is connected to the conduit 20 of the circuit.
Move to. In the valve chamber 38, a first valve seat 46 and a second valve seat 48 are fixedly arranged on the casing. The free end of the rod 36 has a guide hole 50 (FIG. 3) in which a first closing member 520 cylindrical projection 51 can slide, extending over a dimension greater than the adjusting movement of the force 34. I was guided around in a relaxed manner. A second closure member 54 is secured to the rod 36 at a distance from its free end, the sealing surface 58 of which faces towards the electromagnet 18.

The second closing member 54 is arranged corresponding to the second valve seat 48 . The two closure members 52 and 54 have conical sealing surfaces 56 and 58 facing in opposite directions. The sealing surfaces 60 and 62 of the valve seats 46 and 48, which correspond to the sealing surfaces 56 and 58, therefore face each other. The two sealing surfaces are arranged around the longitudinal axis of the rod 36 so that the two sealing surfaces directly face each other, with the rod 36 passing through the valve seat 48 of the second closing member 54 . 2
two closure members 52 and 54 and corresponding two closure members 52 and 54;
The two valve seats 46 and 48 belong to a shut-off device 64 housed in the valve chamber 38 . The third connecting pipe 44 of the valve 16 is a shutoff device 64
and on the opposite side of the first connecting pipe 40 and the second connecting pipe 42 with respect to the flow of the coolant. In the operating position as shown in FIG. 2, the two valve seat passages 70 and 72 are closed and closed. The valve seat passage 72 is in this case blocked by the force of the preloaded return spring 74, which forces the anchor 34 with the rod 36 and the closing member 54 by its sealing surface 58 against the valve seat 48.
to the end position where it contacts the sealing surface 62 of. In this case, the annular end surface 76 of the rod 36 is spaced apart from the rod-side shoulder 80 of the closure member 52 by a distance 78 corresponding to the adjustment movement of the anchor and therefore of the rod 36. The first closing member 52 is therefore in contact with the sealing surface 60 of the valve seat 46 solely by its own weight.

Next, the operation of the heating device will be explained. Transport pump 26 (first
FIG. 2 pushes the coolant in the direction of the arrow 28 through the cooling channel of the internal combustion engine 10, the heating branch 12 and the heat exchanger 14 into the first connecting pipe 40 of the valve 16. The second closing member 54 is a return spring 7
Since the valve 16 is in contact with the second valve seat 48 by the force of
The detour 30 connecting to the second connecting pipe 42 is cut off.

The transport pressure of the pump 26 is applied to the first closure member 52 and pushes it up a distance 78 corresponding to the adjustment movement of the anchor 34 . The closing member 52 is therefore in its operating position shown in FIG. 3, so that cooling liquid can flow from the connecting tube 4u via the connecting tube 44 into the conduit 20 to the cooler 22. The air is then heated in a heat exchanger 14 and blown 1 into a passenger compartment (not shown) of the motor vehicle. When the heat supply to the passenger compartment is to be stopped, the electromagnet 18 is excited and the anchor 34 is attracted. At the same time, the second closing valve 54 opens the valve passage 72 and pushes the ring-shaped end surface 76 of the rod 36 against the shoulder 80 of the first closing member 52 (FIG. 3). The first valve passage 70 formed by the valve seat 46 and the closing member 52 is now blocked, and the valve seat 48
and the valve passage 72 formed by the closing member 54 is opened (the cooling liquid bypasses the heat exchanger 14 via the detour 30 and passes through the second connecting pipe 42 of the valve 16 and the valve chamber 38 to the valve 1
6 and from there flows via conduit 20 to cooler 22,' and to transport pump 26.

By blocking the passage through the heat exchanger 14, the bypass 30 is opened (so that the transport pump 26 does not have to operate against the closed valve, thus avoiding pressure peaks at the moment of valve closure).

In the operating position shown in FIG.
When the valve is stopped, its sealing cone 56 contacts the sealing surface of the valve seat 46, so that the closing member 52 acts as a check valve.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of an automobile passenger compartment heating system, FIG. 2 is a longitudinal cross-sectional view of a valve in a coolant circuit of the heating system, and FIG. 3 is a vertical cross-sectional view of a closing member of the valve shown in FIG. 10... Internal combustion engine 12... Heating shunt 14...
Heat exchanger 16... Valve 18... Electromagnet 22...
・Cooler 26...Pump 30...Detour 34...
・Anchor 36...Rod 40, 42.44...
Connection pipe 46.48... Valve seat 50... Guide hole 51
...Cylindrical protrusion 52.54...Closing member 64
...Shutoff device

Claims (1)

[Claims] 1. In a device for heating the passenger compartment of a motor vehicle, which has an internal combustion engine to be cooled, a transport pump, a heat exchanger and a coolant circuit in which a valve is arranged to shut off the liquid passage through the heat exchanger,
A detour (30) in which the coolant circuit bypasses the heat exchanger (14)
), and this detour connects the heat exchanger (14) of the coolant circuit.
Device for heating the passenger compartment of a motor vehicle, characterized in that a heating branch (12) passing through the circuit forms a circuit when it is interrupted by a valve (16). 2. The valve (16) has three connecting pipes (40, 42, 44), the first connecting pipe (40) being connected to the heating branch (12);
A second connecting pipe (42) connects to the detour (30), and this second connecting pipe (42)
The two connecting pipes (40, 42) are alternately opened and closed by the shut-off device (64), the third connecting pipe (44) being connected to the first and second connecting pipes (40, 42) to the shut-off device (64) and to the flow of coolant (arrow 28). Pipe (4
0,42). 6. For actuation, the valve has an electromagnet, the anchor of which is attracted against the force of a return spring when the magnet is energized, and which, via a member fixedly connected to the anchor, causes a relaxation in the direction of adjustment of the anchor. A closing element belonging to the shut-off device guided in the opposite direction presses against the valve seat which is connected to the valve casing, the closing element and the corresponding valve seat being located between the heating branch and the third connecting pipe, viewed in the flow direction of the coolant. The anchor (34) and the second closing member (54) belonging to the shutoff device (64) are fixedly connected to each other, and a second valve seat (54) fixed to the casing is connected to the anchor (34) in a fixed manner.
48) and two closure members (52 or 54)
each of the valve seats (54 or 52) of the other closing member (54 or 52).
46 or 48), a second closing member (54) with a valve seat (48) connects the detour (30) and the third connecting pipe (44) when viewed in the cooling fluid flow direction (arrow 28).
). 4. The member that connects with the anchor (34) is the second closing member (5).
4. The device according to claim 3, wherein the device is formed as a rod (36) passing through the valve seat (48) of the valve seat (48). 5. 5. Device according to claim 4, characterized in that the second closure member (54) is fixed to the rod (36) with its sealing surface (58) facing the electromagnet (18). 6. The first closure member (52) has a cylindrical projection (51) which extends into the guide hole (50) of the rod (36) at a distance greater than the adjustment movement distance (78) of the anchor (34). 6. The device of claim 5, wherein the device is slidably guided across.