Cooling and heating central control device of public bus

Abstract

The invention relates to a cooling and heating central control device of a public bus. The cooling and heating central control device is applicable to urban public buses with certain requirements on temperature regulation for air in the public buses and low-temperature protection for engines of the public buses. The cooling and heating central control device comprises an operation control circuit, a cooling control circuit and a heating control circuit; the operation control circuit, the cooling control circuit and the heating control circuit are connected with one another by a CAN (controller area network) bus; the operation control circuit comprises a first control circuit, a driving and displaying circuit and a keying circuit; the cooling control circuit comprises a first follower, a second control circuit, a first follow and fan driving circuit and a first driving circuit; and the heating control circuit comprises a second follower, a third control circuit, a second follow and fan driving circuit and a second driving circuit. The cooling and heating central control device has the advantages of good comfortableness and capability of realizing continuous temperature regulation for air in the public bus and low-temperature protection for an engine of the public bus.

Description

technical field [0001] The invention relates to a centralized control device for refrigeration and heating of a bus, which is suitable for urban buses with certain requirements for air temperature regulation in the bus and low-temperature protection of the engine. Background technique [0002] In recent years, as the government's investment in public utilities has continued to increase, the technical level of public transport as a city card has also been continuously improved, from without heating devices to heating devices, from heating devices without cooling devices, to That is, it has a heating device and a cooling device; the water tank fan used as the engine heat dissipation has been coupled from a direct connection to a silicon oil clutch coupling, and then to a water temperature control electromagnetic clutch coupling; the application and improvement of these devices have improved the comfort and comfort of the vehicle. Engine low temperature protection. But at pres...

AI Technical Summary

Problems solved by technology

But at present, these devices are simply controlled individually. The heating device cannot achieve smooth temperature control. When all functional modules are activated, there may even be some mutual influence. , In-vehicle air conditioning mode and other factors to achieve networked intelligent control, there are mainly the following problems:

[0003] (1) The heating device is only controlled by a simple switch, that is, the water pump and the heater are turned on through the rocker switch on the instrument panel. There is no cabin temperature control system, and the temperature in the cabin can only be controlled by manually switching the water pump and the heater. The wind speed of the fan can either not be adjusted, or can only be turned off in groups. As a result, high or low temperature in the compartment or uneven temperature often cause passengers to complain, which has a certain impact on comfort, and frequent operation of the rocker switch also affects driving safety.

[0004] (2) The heating device cannot restrict its switch and control the speed of the heater according to the engine water temperature. The disadvantage of this is that the heater will be turned on before the engine water temperature heats up in winter, and the engine cannot be heated up quickly to reach the optimal operating temperature; at the same time, the engine Most of the heat of the water circulation system is dissipated in the cabin, which makes the temperature in the cabin too high, and the water temperature of the engine itself does not reach the optimal operating temperature, causing the engine to run at a non-optimal water temperature for a long time, which affects the life of the engine and the comfort of the cabin

[0005] (3) The manipulator, water pump, and heater of the refrigeration device all adopt independent control systems, and there is no related control between them. When the driver misoperates or forgets to turn off a certain function, it often happens that the heater and water pump are still on when the cooling is turned on. When working, the water pump is forgotten to be turned off when the heating is turned off, which will affect the comfort of the cabin and the life of the water pump. Especially in summer, when the main valve of the heating control water circulation system is closed, the water pump is turned on by mistake, which may cause the water circulation system of the engine to be damaged. pipe blasting

Images