KR100240286B1 - Cooling system for testing of heat balance - Google Patents

Abstract

The present invention relates to a cooling system for a heat balance test, and a heat balance cooling system for cooling a sensor mounted on an engine for measuring engine temperature and pressure of a high temperature working fluid for an engine dynamo test. 20, the water pump 50 for pumping the coolant from the water tank 20 to the pressure sensor 10 mounted on the engine to be tested through the coolant passage, to cool the pressure sensor 10 The water level control unit 30, 40 for supplying the cooling water from the water supply tank 20 to the pressure sensor side at a constant condition through the formed cooling water passage, and the cooling water pumped by the water pump 50 under predetermined conditions It is configured to include a accumulator (60) to be constantly supplied.

Description

Cooling system for heat balance test

The present invention is a heat balance that can be applied to a technical field for measuring engine performance through an engine dynamo test or a sensor for measuring a temperature and pressure of a high temperature working fluid that requires cooling. heat balance) A cooling system for testing.

The engine dynamo test is a type of simulation that uses a hypothetical condition to test the engine's performance.

In brief description of the dynamo test with reference to the drawings, in the case of testing the performance of the engine as shown in FIG. 2, the drawings are intended to test the pressure and temperature changes in the cylinder and the cooling system during engine operation. The cooling system for cooling the engine should be installed. The cooling system for this purpose is to supply the coolant to the engine through the flow meter from the water supply tank to circulate the engine and return to the water supply tank. The controller checks if the engine is overheated and the hot water is discharged from the water tank when the cooling effect by the coolant decreases, and the solenoid valve controls the coolant to cool the water tank. It is made to supply.

Since the engine generates high heat due to the combustion of fuel during operation, the engine is circulated by supplying coolant to separately cool the sensors in order to maintain a heat-sensitive pressure sensor or the like mounted on the engine for heat balance testing below a predetermined temperature. The state requires a cooling system.

As such a cooling system, a cooling system as shown on the left in the schematic diagram shown in FIG. 2 is conventionally used. The cooling system is used to connect a coolant hose directly to an external faucet to cool the pressure sensor 10 located in the engine by external coolant supply.

However, when the coolant is supplied to cool the pressure sensor as described above, pulsation of tap water occurs, which may adversely affect the expensive sensor.

That is, the supply of the cooling water is irregular, so that the pressure sensor is unevenly cooled or, in severe cases, the supply of the cooling water decreases, and thus the sensor is frequently stuck. In particular, the coolant passage in the pressure sensor sensitive to high temperature heat should always be maintained at a constant pressure. When bubbles are included in the coolant passage, the accuracy of the pressure sensor is significantly reduced, making accurate pressure sensing impossible.

The present invention is to solve the above-mentioned problems of the prior art, a heat supply to maximize the maintenance of the precision of the sensor and to extend the life by stably supplying the coolant to the sensor unit to maintain the sensor for the dynamo test at a predetermined temperature The aim is to provide a cooling system for balance testing.

In order to achieve the above object, the present invention senses the water level in a separate water tank for storing and supplying cooling water and drives the water pump accordingly to pump the cooling water into the cooling water passage to the pressure sensor mounted on the engine. By installing an accumulator in the cooling water passage so that the cooling water is constantly supplied, the pressure sensor is constantly cooled below a predetermined temperature to obtain a stable cooling effect.

1 is a system diagram of a cooling system of the present invention.

2 is a schematic diagram of a conventional cooling system.

* Explanation of symbols for main parts of the drawings

10: pressure sensor 20: reservoir

21: moon plate 30: water level sensor

40 controller 50 water pump

60: accumulator

In order to achieve the above object, a heat balance test cooling system according to the present invention is provided to supply coolant to a separate water tank storing and supplying cooling water and a cooling water passage communicated from the water supply tank to a sensor unit mounted on the engine to be tested. A water pump, a coolant supply control unit for detecting the quantity of coolant stored in the water supply tank and controlling the operation of the water pump to supply the coolant constantly, and a accumulator provided in the coolant passage so that the coolant is supplied at a predetermined pressure to the sensor unit. It is configured to include.

The accumulator is installed on the cooling water passage between the water pump and the sensor mounted on the engine to be tested to supply the cooling water at a predetermined pressure and to remove the bubbles contained in the cooling water of the passage.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the present invention.

In order to cool the pressure sensor 10 mounted to the engine for the engine dynamo test, the heat balance cooling system according to the present invention includes a coolant water supply tank 20, and the water supply tank 2 has a overflow plate 21 at the center. ) Is installed and the water level sensor 30 is provided to detect the low water amount of the coolant. A cooling water passage is formed in communication with the pressure sensor 10 mounted on the engine from the water tank 20, and a water pump 50 is provided in the passage, and the water pump is pre-programmed according to the water level of the water tank. A controller 40 is provided for controlling the operation of the. The water pump 50 pumps the cooling water of the water supply tank 20 to the pressure sensor 10 mounted to the engine through the cooling water passage.

The accumulator 60 is provided in the cooling water passage between the pressure sensor 10 and the water pump 50. The accumulator 60 performs a back pressure operation to maintain a constant pressure of the cooling water pumped through the passage, and removes bubbles contained in the cooling water in the passage. A passage communicates with the cooling water passing through the pressure sensor 10 to the water supply tank 20.

Looking at the operation and effect of the present invention configured as described above, the external tap water is first supplied to the water supply tank 20 to store the overflow plate 21 and then to supply the cold water. Therefore, the cooling water flow rate fluctuation due to the pulsation of tap water does not appear in the water supply tank 20, so that the cooling water supply from the water supply tank can be stably performed. The water level sensor 30 is mounted on the water level sensor to detect the water level in the water tank, and the controller 40 receives the output signal from the water level sensor 30 and drives the water pump 50 as previously programmed. The coolant from the bath is forced into the passage to the pressure sensor.

Since the coolant pumped by the water pump 50 is accumulated by the accumulator 60 and then supplied to the pressure sensor 10 mounted on the engine at a predetermined pressure, the coolant contained in the coolant is stably supplied. Therefore, the pressure sensor 10 can be cooled constantly.

The cooling system for the heat balance test according to the present invention is configured to drive the water pump in conjunction with the water level of the water supply tank and install a accumulator in the cooling water supply passage. It is possible to supply stably to the pressure sensor mounted on the engine during the dynamo test, which improves the reliability of the cooling system and prevents the failure of the pressure sensor used for the engine dynamo test, thus improving the service life and maximizing precision. There is this.

Claims (3)

A heat balance cooling system for cooling a sensor mounted on an engine for measuring engine temperature and pressure of a high temperature working fluid for an engine dynamo test, the cooling water supply tank 20 provided separately from the water supply tank 20. The water pump 50 for pumping the coolant to the pressure sensor 10 mounted on the engine to be tested through the coolant passage, from the water supply tank 20 through the coolant passage formed to cool the pressure sensor 10 Cooling water supply control unit (30, 40) for supplying the cooling water to the pressure sensor side under a constant condition, and the accumulator (60) to constantly supply the cooling water fed by the water pump 50 under a predetermined condition Cooling system for heat balance testing, characterized in that configured. The water level sensor 30 of claim 1, wherein the coolant supply control unit detects the level of the coolant in the water supply tank 20, and the level detected by the water level sensor 30. Cooling system for a heat balance test, characterized in that consisting of a controller 40 for receiving the output signal for controlling the driving of the water pump (50). According to claim 1, wherein the accumulator (60) is installed between the water pump 50 and the pressure sensor 10 on the cooling water conduit to maintain the pressure on the conduit of the cooling water supplied and discharge the bubbles in the pipe. Cooling system for heat balance test.