Cooling oil pump system of oil cooling charging gun

Abstract

The utility model discloses a cooling oil pump system of an oil cooling charging gun, which comprises an oil tank, an oil pump, a heat exchanger and a control system, in the control system, an oil outlet temperature sensor is arranged at the oil outlet of the heat exchanger and is used for acquiring the outlet temperature T2 of cooling oil at the oil outlet of the heat exchanger; the oil outlet pressure sensor is installed at an oil pump outlet and used for obtaining outlet oil pressure P of the oil pump. The oil return temperature sensor is installed at an oil return opening of the heat exchanger and used for obtaining the inlet temperature T1 of cooling oil at the oil return opening of the heat exchanger. The cooling unit controller TTC is respectively connected with an oil outlet temperature sensor, an oil outlet pressure sensor, an oil return temperature sensor and an oil pump; the controller is used for collecting inlet temperature T1, outlet temperature T2, outlet oil pressure P and liquid level height H and controlling operation and rotating speed of the oil pump. The rotating speed of the oil pump can be adjusted according to the required heat dissipating capacity, the oil pump does not need to operate under the high-rotating-speed working condition for a long time after being started, and cooling power and low noise can be compatible.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charging equipment, specifically, an oil cooling charging gun cooling oil pump system. BACKGROUND

[0002] With the popularization of new energy vehicles, high-power fast charging has become an inevitable trend, and the oil cooling charging gun uses oil to cool the charging gun, and the cold water source is used to cool the oil through the heat exchanger.

[0003] Due to the compact structure of the charging gun and the long cable, the flow resistance of the cooling oil circuit is large, and a gear pump or the like displacement pump needs to be used for driving. In the prior art, the oil pump is mostly operated at a constant frequency. When the oil pump is just started, the oil pressure is large, which is easy to cause impact on the charging gun and its pipeline, and the charging gun is damaged. After the oil pump is started, the flow rate increases with the increase of the rotating speed of the oil pump, and the cooling effect will be improved, but the noise will be increased accordingly. The application scenarios of the charging pile are mostly located in commercial areas and residential areas, and long-time high noise will disturb the residents. SUMMARY

[0004] The utility model aims at providing an oil cooling charging gun cooling oil pump system, which meets the requirements of charging gun cooling efficiency and low noise.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] An oil cooling charging gun cooling oil pump system, comprising an oil tank, an oil pump and a heat exchanger; the oil pump inlet and the oil pump outlet are connected with the oil tank and the charging gun cooling oil pipeline inlet through oil pipelines respectively, the heat exchanger oil return port is connected with the charging gun cooling oil pipeline outlet, and the heat exchanger oil outlet is connected with the oil tank;

[0007] Further comprising a control system, wherein the control system comprises:

[0008] An oil outlet temperature sensor is installed at the heat exchanger oil outlet and is used to obtain the outlet temperature T2 of the cooling oil at the heat exchanger oil outlet;

[0009] An oil outlet pressure sensor is installed at the oil pump outlet and is used to obtain the outlet oil pressure P of the oil pump;

[0010] An oil return temperature sensor is installed at the heat exchanger oil return port and is used to obtain the inlet temperature T1 of the cooling oil at the heat exchanger oil return port;

[0011] A cooling unit controller TTC is connected with the oil outlet temperature sensor, the oil outlet pressure sensor, the oil return temperature sensor and the oil pump respectively; the cooling unit controller TTC is used to collect the inlet temperature T1, the outlet temperature T2, the outlet oil pressure P and the liquid level height H, and control the operation and rotating speed of the oil pump.

[0012] Further, a liquid level sensor is arranged in the oil tank to obtain the liquid level H in the oil tank.

[0013] Further, the heat exchanger is a plate heat exchanger.

[0014] Further, an electromagnetic switch valve is arranged at the outlet of the oil pump, and the electromagnetic switch valve is connected with the cooling unit controller TTC.

[0015] Further, an oil suction filter is arranged between the oil pump and the oil tank.

[0016] The oil-cooled charging gun cooling oil pump system can adjust the rotating speed of the oil pump according to the required heat dissipation amount, and the oil pump does not need to run at high rotating speed for a long time after being started, so that the cooling power and low noise can be compatible, so that the requirements of energy saving and non-disturbance can be met. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to further illustrate the present application, form a part of the present application, and are used to explain the present application, and do not constitute an improper limitation on the present application.

[0018] Figure 1 is a structural schematic view of the oil-cooled charging gun cooling oil pump system of the present application;

[0019] Figure 2 is a structural block diagram of the control system of the present application;

[0020] Figure 3 is a principle diagram of the oil-cooled charging gun cooling oil pump system of the present application;

[0021] Figure 4 is a control logic flow chart of the control system of the present application.

[0022] In the figure, 1 is an oil tank, 2 is an oil pump, 3 is a heat exchanger, 4 is an oil outlet temperature sensor, 5 is an oil outlet pressure sensor, 6 is an oil return temperature sensor, 7 is a cooling unit controller TTC, 8 is an electromagnetic switch valve, 9 is an oil suction filter, 10 is a liquid level sensor, 11 is an exhaust valve, and 12 is a host. DETAILED DESCRIPTION

[0023] In order to make the skilled in the art better understand the present application, the present application will be further explained in detail below in combination with the accompanying drawings and embodiments. It should be noted that the features in the embodiments and examples in the present application can be combined with each other without conflict.

[0024] For example, Figure 1As shown, the utility model of a typical embodiment provides an oil cooling charging gun cooling oil pump system, including oil tank 1, oil pump 2 and heat exchanger 3.

[0025] Oil pump 2 entrance and oil pump 2 outlet are connected with oil tank 1 and charging gun cooling oil pipeline entrance respectively through oil pipeline, and heat exchanger 3 back oil port is connected with charging gun cooling oil pipeline outlet, and heat exchanger 2 oil outlet is connected with oil tank 1.

[0026] Exemplarily, the heat exchanger 3 is a plate heat exchanger.

[0027] On this basis, the oil cooling charging gun cooling oil pump system provided by the embodiment further includes a control system, such as Figure 2 As shown, the control system includes an oil outlet temperature sensor 4, an oil outlet pressure sensor 5, an oil return temperature sensor 6 and a cooling unit controller TTC 7.

[0028] Among them, the oil outlet temperature sensor 4 is installed at the heat exchanger 3 oil outlet, and is used to obtain the outlet temperature T2 of the cooling oil at the heat exchanger 3 oil outlet;

[0029] Among them, the oil outlet pressure sensor 5 is installed at the oil pump 2 outlet, and is used to obtain the outlet oil pressure P of the oil pump 2;

[0030] Among them, the oil return temperature sensor 6 is installed at the heat exchanger 3 back oil port, and is used to obtain the inlet temperature T1 of the cooling oil at the heat exchanger 3 back oil port;

[0031] Among them, the cooling unit controller TTC 7 is connected with the oil outlet temperature sensor 4, the oil outlet pressure sensor 5, the oil return temperature sensor 6 and the oil pump 2 respectively; for collecting the inlet temperature T1, the outlet temperature T2, the outlet oil pressure P and the liquid level H, and controlling the operation and speed of the oil pump 2.

[0032] The oil pump 2 outlet is provided with an electromagnetic switch valve 8, and the electromagnetic switch valve 8 is connected with the cooling unit controller TTC 7.

[0033] The cooling oil is sucked out from the oil tank 1 by the oil pump 2 and filtered, and the electromagnetic switch valve 8 is controlled to be on-off according to the working mode, the cooling oil flows into the charging gun from the on oil path, the cooling oil contacts with the charging gun cable to take away heat and becomes hot oil, the hot oil enters the heat exchanger 3, and the cooling liquid enters the heat exchanger 3 to take away the heat of the hot oil, and the cooling oil flows out from the heat exchanger 3 and returns to the oil tank 1. The above-mentioned cooling liquid usually adopts a 50% mass concentration glycol water solution.

[0034] In a preferred embodiment, a liquid level sensor 10 is installed in the oil tank 1, which is used to obtain the liquid level H in the oil tank 1.

[0035] In another preferred embodiment, the oil-cooled charging gun cooling oil pump system comprises an oil suction filter 9 arranged between the oil pump 2 and the oil tank 1, and the oil suction filter 9 is used for filtering the cold oil.

[0036] The overall concept of the utility model is to control the oil pump to start and change the oil pump control voltage according to the heat dissipation amount. The host computer 12 supplies power to the cooling unit controller TTC7, the cooling unit controller TTC7 collects signals such as the inlet temperature T1, the outlet temperature T2, the outlet oil pressure P of the oil pump and the liquid level height H of the oil tank, controls whether the oil pump 2 operates and the rotating speed according to the logic, and the host computer supplies power to the cooling unit controller TTC7 to start the logic cycle.

[0037] As shown in Figure 4 The host computer supplies power to the cooling unit controller TTC7 to start, the liquid level sensor 10 detects the liquid level height H, if the liquid level height H is between 50mm and 150mm, the cooling unit controller TTC7 supplies 24V power to the oil pump 2 and controls the signal to 0.5V, otherwise, the oil pump 2 is not powered to work and an alarm is given.

[0038] After the oil pump 2 starts, the outlet oil pressure P of the oil pump 2 is collected, if the outlet oil pressure P is higher than 5bar, it is judged that the system is locked, the oil pump 2 is stopped and an alarm is given, otherwise, the oil pump 0.5V control voltage works for 30s after the rotating speed, the oil pump 2 starts the stage and enters the normal working stage.

[0039] The cooling unit controller TTC7 detects the inlet temperature T1 every second, if T1≤50℃, the oil pump 1.5V control signal operates, if 50℃

[0040] In the normal working stage, the outlet oil pressure P of the oil pump 2 is collected every second, if P≤5bar, the normal working is carried out, otherwise, the oil pump is stopped and an alarm is given.

[0041] In the normal working stage, the outlet temperature T2 is collected every ten seconds, the difference between T1 and T2 is calculated, if T1-T2≤2℃, it means that the cooling source has a problem, that is, an alarm is given, otherwise, no reaction is carried out.

[0042] The protection scope of the utility model is not limited to the above specific embodiments, for those skilled in the art, the utility model can have various modifications and changes, any modification, improvement and equivalent replacement made within the concept and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An oil-cooled charging gun cooling oil pump system, comprising an oil tank, an oil pump and a heat exchanger; the oil pump inlet and the oil pump outlet are connected with the oil tank and the charging gun cooling oil pipeline inlet respectively through oil pipelines; the heat exchanger oil return port is connected with the charging gun cooling oil pipeline outlet, and the heat exchanger oil outlet is connected with the oil tank; characterized in that: Also included is a control system, the control system comprising: an oil outlet temperature sensor installed at the oil outlet of the heat exchanger for obtaining the outlet temperature T2 of the cooling oil at the oil outlet of the heat exchanger; an oil outlet pressure sensor installed at the outlet of the oil pump for obtaining the outlet oil pressure P of the oil pump; an oil return temperature sensor installed at the oil return of the heat exchanger for obtaining the inlet temperature T1 of the cooling oil at the oil return of the heat exchanger; a cooling unit controller TTC connected with the oil outlet temperature sensor, the oil outlet pressure sensor, the oil return temperature sensor and the oil pump respectively; for collecting the inlet temperature T1, the outlet temperature T2, the outlet oil pressure P and the liquid level height H, and controlling the operation and rotating speed of the oil pump.

2. The oil-cooled charging gun cooling oil pump system of claim 1, wherein: a liquid level sensor installed inside the oil tank for obtaining the liquid level height H in the oil tank.

3. The oil-cooled charge gun cooling oil pump system of claim 1 or 2, characterized by: The heat exchanger is a plate heat exchanger.

4. The oil-cooled charging gun cooling oil pump system of claim 3, wherein: An electromagnetic switch valve is arranged at the outlet of the oil pump, and the electromagnetic switch valve is connected with the cooling unit controller TTC.

5. The oil-cooled charging gun cooling oil pump system according to claim 1 or 4, characterized in that: An oil suction filter is arranged between the oil pump and the oil tank.

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