JPS59102611A - Method and device for utilizing heat of loss of hydraulic driving working machine of car - 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 The present invention relates to a method for utilizing the heat loss of a hydraulically driven working machine of a vehicle in a working medium circuit comprising a cooling device and a cooling device, and to an apparatus for carrying out the method.

Depending on the weather, it is necessary to heat the driver's cabin of a vehicle. If an internal combustion engine is provided as the drive machine, the energy of the engine oil or the energy of the engine cooling circuit can be used as the heat source. Note that this requires approval from the manufacturer. If this approval is not obtained, additional heating equipment must be provided.

In particular, approval is often not obtained from the manufacturer when utilizing the lost energy of drive machines, such as diesel engines, of self-propelled working machines, such as earth-moving machines. It is therefore necessary to provide a special heat source for heating the cab and to use additional energy for this heat source. However, earthmoving machines of this type are often equipped with, for example, rudder, axle devices, ie hydraulically driven working machines.

The object of the invention is therefore to provide heating of the driver's cab without consuming additional energy.

The problem is that in the method mentioned at the outset, the loss heat generated in the liquid working medium and flowing together with the working medium is conducted from the pipes via the heating heat exchanger to the operator's cabin and is then used to control or regulate the room temperature. It is solved by being used for In a device suitable for carrying out this method, a heating heat exchanger is provided in the operator compartment, which can be connected to the working medium stream via a two-way valve and a line. In this case, the two-way valve can direct the working medium flow into a bypass line that quickly bypasses the heating heat exchanger. Furthermore, a thermovalve is provided in series with the cooling device, which valve switches the working medium flow to a bypass line which bypasses the cooling device with a selectable transmission characteristic. Heating heat exchanger and/or
Alternatively, forced air means may be useful to increase the efficiency of the cooling system. Such a device can be constructed in a manner known per se as a control or regulating circuit, by means of which the temperature in the cab is controlled or regulated to a predetermined value.

For this purpose, actuators such as actual value sensors, for example from the technical field of thermo-valves, connected in series with the cooling device of the working medium circuit, two-way valves connected in series with the heat exchanger for heating the cab, or Setpoint value transmitters are known per se.

The present invention will be explained in detail based on the figures.

FIG. 1 shows a pump device 1, a collection device 2, for example a tank,
and a working medium circuit with a cooling device 3. This working medium circuit further includes a hydraulically driven working machine 4 which is controlled via a control valve 5 . A heating heat exchanger 6 arranged in the operator's cab can be connected to the working medium stream via a Soway valve 7 and a line 8 . Two-way valve 7
Furthermore, it is possible to direct the working medium flow into a bypass line which bypasses the heating heat exchanger 6.

Furthermore, as can be seen from the figure, a thermovalve 10 is provided in series with the cooling device 3. With a selectable transmission characteristic, this thermovalve can switch the working medium flow to a bypass line 1l which bypasses the cooling device 3. In order to increase the efficiency of the device, the heating heat exchanger 6 and/or the cooling device 3 are provided with forced ventilation means, for example a heating fan 12 and a cooling fan 13. A liquid working medium 14 is contained within the collection device 2 .

In FIG. 2, corresponding parts are provided with the same reference numerals. This figure shows that the method according to the invention can be carried out in one way by providing two return pipes leading to the waste collecting device 2.
It has been shown that it can be implemented with one device.

That is, the pump device 1 is divided into a first pump drive section 15 and a second pump drive section 16, which drive a first work machine group 17 and a second work machine group 18, respectively. .

As can further be seen from the figure, the method according to the invention allows the loss heat generated in the liquid working medium 14 for the operation of the working machine 4 and flowing with the working medium to be transferred to the pipes and the heating heat exchanger 6.
After that, you will be led to the driver's cabin. This is advantageous since it is not necessary to provide an energy source solely for heating the driver's cabin.

Furthermore, the thermovalve 10 makes it possible, for example, at the time of start-up of the working machine, to allow the working medium to flow into the bypass line 11 to bypass the cooling device 3, thereby providing rapid heating of the operator's cab.

Once this has been done to a sufficient extent or the working medium 14 has reached a suitable temperature, the thermovalve 10 is activated in the bypass conduit 1.
1 is stopped and the working medium flows to the cooling device 13. Further cab heating, which may be undesirable in some cases, is avoided by switching the position of the two-way valve 7 to allow the working medium to flow into the bypass line 9 and to circulate the heating heat exchanger 6. This bypass line 9 can be arranged outside the cab, so that the working medium does not contribute entirely to the further heating of the cab.

As is well known, the method of the invention can be implemented within a controlled or regulated process. In this case, the working medium circuit is provided with actual values that are known per se and, depending on their output values, a predetermined actuator, i.e. a two-way valve 7.
and/or the thermovalve 1o is controlled or regulated.

[Brief explanation of the drawing]

FIG. 1 shows a working medium circuit with one return pipe;
FIG. 2 shows a working medium circuit with two return pipes. 1...Pump device 2...Collection device 3...Cooling device 4...Work machine 5...Control valve 6...Heating heat exchanger 7-...Two-way valve 8... Conduit 9...Bypass conduit 1011...Thermo valve 11...Bypass conduit 12...Heating ventilator 13...Cooling ventilator 14...Working medium 15...First Pump drive unit 16...Second pump drive unit agent Hikaru Esaki Yoshihiro Esaki Agent

Claims (1)

[Scope of Claims] 1. A method for utilizing the heat loss of a hydraulically driven working machine of a vehicle in a working medium circuit consisting of at least a pumping device, a collecting device, and a cooling device, in which a liquid working medium (14
), and which flows with the working medium, is conducted to the operator's cabin via a pipe or heating heat exchanger (6) and is used for controlling or regulating the room temperature. . 2. A working medium circuit consisting of at least a pumping device, a collecting device and a cooling device, in a way that takes advantage of the heat loss of the hydraulically driven working machine of the vehicle, which occurs in the liquid working medium and flows together with the working medium. In a device for carrying out the method in which the lost heat is conducted from the pipe through a heating heat exchanger to the cab and used for the control and regulation of the room temperature, a two-way valve (7) and a pipe ( 8) A device characterized in that a heating heat exchanger (6) is provided in the operator's cab, which can be connected to the working medium stream via a heat exchanger (6). 3. A two-way valve (7) selectively switches the flow of the working medium into a bypass pipe (9) that quickly circulates the heating heat exchanger (6).
4. A device according to claim 2, characterized in that a thermovalve (10) is provided in series with the cooling device (3) and with a selectable transfer characteristic. 3)
Claim 3, characterized in that the working medium flow is alternatively switched to the bypass line (11) which quickly circulates the
Apparatus described in section. 5. Heating heat exchanger (6) and/or cooling device (
5. Device according to claim 3, characterized in that forced ventilation means are provided for 3). 6. The device according to any one of claims 2 to 5, characterized in that the device is provided with a control or adjustment circuit that controls or adjusts the temperature of the driver's cabin to a predetermined value. .