CN104808710B - Unmanned helicopter equipment cabin temperature control system capable of utilizing external airflow - Google Patents

Abstract

The temperature control system of the unmanned helicopter equipment cabin that can utilize the external air flow of the present invention comprises: an equipment cabin, an air inlet, an air filter device, a fan, an electric heater, an equipment cabin temperature controller, a block guide board, temperature sensors, electronics, and an exhaust port. The invention utilizes the external airflow of the unmanned helicopter's rotor to generate slip flow and the relative airflow generated during forward flight to heat or cool the electronic equipment in the equipment cabin, thereby reducing the working time of the fan and saving the machine. Carrying energy and improving the overall performance of the unmanned helicopter.

Description

An unmanned helicopter equipment compartment temperature control system that can utilize external airflow

technical field

The invention relates to an environment control system of an unmanned helicopter, in particular to an unmanned helicopter equipment cabin temperature control system which can utilize airflow outside the body, and belongs to the technical field of unmanned helicopter cabin environment control.

Background technique

The electronic equipment of unmanned helicopters is generally arranged in the equipment compartment inside the fuselage. Because the electronic equipment will generate a lot of heat during work, the temperature of the equipment compartment will rise. When the temperature exceeds a certain range, the electronic equipment will not work properly. Work. On the contrary, when the external ambient temperature is very low, the temperature in the equipment compartment will be too low, which will also affect the normal operation of the electronic equipment. In order to ensure that the temperature of the equipment compartment does not exceed the temperature limit range of the electronic equipment, a temperature control system needs to be designed. The control system needs to introduce air outside the body into the equipment compartment to cool the electronic equipment when the temperature of the equipment compartment is higher than the specified value; when the temperature of the equipment compartment is lower than the specified value, it can heat the equipment in the equipment compartment. This temperature control system needs to consume the onboard energy of the unmanned helicopter for driving fans and electric heaters and other equipment, which will increase the energy consumption of the unmanned helicopter. At the same time, the rotor of the unmanned helicopter will produce a slipstream perpendicular to the direction of the rotor paddle when the unmanned helicopter is hovering. When the unmanned helicopter is hovering, the slipstream will act on the fuselage; on the fuselage. Whether it is the slipstream when hovering or the airflow when flying forward, it can be used in a reasonable way.

Contents of the invention

The purpose of the present invention is to use the external air flow of the two kinds of body, the slip stream generated by the rotation of the rotor of the unmanned helicopter and the relative air flow generated during the forward flight, to heat or cool the electronic equipment in the equipment cabin, so as to reduce the working time of the fan, thereby Save onboard energy and improve the overall performance of unmanned helicopters.

An unmanned helicopter equipment compartment temperature control system that can utilize external airflow of the present invention comprises: an equipment compartment, an air inlet, an air filter, a fan, an electric heater, an equipment compartment temperature controller, a guide flow plate, temperature sensors, electronics, and an exhaust port. Their positions and connection methods are: the air inlet is located at the front of the skin of the equipment compartment; the air filter is installed on the air intake; The controller is connected; the electric heater and the fan are installed in series, and are connected to the temperature controller of the equipment compartment through cables; the temperature controller of the equipment compartment is installed in the equipment compartment, and are respectively connected to each temperature sensor, fan and electric heater through cables; The deflector is installed on the rear side of the air inlet in the equipment cabin; the temperature sensors are distributed in the equipment cabin, and the specific position is based on the temperature information in the equipment cabin that can be fully collected, and connected to the temperature controller of the equipment cabin through cables; The electronic equipment is fixed in the equipment compartment; the exhaust port is arranged on the wall plate at the rear side of the equipment compartment.

The equipment cabin is an independent section of the unmanned helicopter, located at the front of the unmanned helicopter fuselage, used to install electronic equipment and a complete set of temperature control system of the unmanned helicopter, and provide protection for all equipment in the cabin.

The air inlet is the opening through which the outside air enters the equipment cabin of the unmanned helicopter, and its position is located on the upper skin of the equipment cabin.

The air filter device is installed at the air inlet of the upper skin of the equipment compartment, and is used to filter the air entering the compartment to prevent harmful substances from entering the equipment compartment and affecting the normal operation of the electronic equipment.

The fan is located inside the equipment compartment and is installed inside the air inlet. When the fan works, it sucks outside air into the equipment compartment. It is connected with the temperature controller of the equipment compartment through cables and controlled by the temperature controller of the equipment compartment.

The electric heater is located inside the equipment compartment, installed inside the air inlet, and connected in series with the fan. The electric heater is connected with the temperature controller of the equipment compartment through cables, and is controlled by the temperature controller of the equipment compartment. Its function is to heat the air entering the equipment compartment through the fan under the control of the equipment compartment temperature controller.

The equipment cabin temperature controller is installed in the equipment cabin and is the core equipment of the equipment cabin temperature control system. Its function is to analyze the temperature information collected by the temperature sensor and control the work of the fan and the electric heater according to the temperature in the equipment cabin.

The deflector is installed in the equipment compartment, and the position is located at the rear side of the air inlet. The deflector is a thin curved plate whose function is to prevent the airflow entering the equipment compartment from passing directly through the equipment compartment. After the airflow flowing backward enters the equipment compartment, it flows to the front end of the equipment compartment under the blocking effect of the deflector, and then flows through the entire equipment compartment evenly, so that the equipment in the equipment compartment can fully exchange heat with the airflow.

The temperature sensor is a temperature acquisition device installed in the equipment cabin. The specific number and installation location shall be determined according to the installation location and heating conditions of the electronic equipment in the equipment cabin. The basic principle of the layout is to ensure that real and comprehensive temperature information of the equipment cabin can be collected. The temperature sensor is connected to the temperature controller of the equipment compartment through a cable, the temperature controller of the equipment compartment provides power to the sensor through the cable, and the temperature sensor transmits the collected temperature information to the temperature controller of the equipment compartment through the cable.

The electronic equipment is the avionics equipment of the unmanned helicopter, which is installed in the equipment cabin. The specific quantity, function and installation location are determined according to the overall design requirements of the unmanned helicopter. Only electronic devices are treated as heat sources in the present invention.

The exhaust port is arranged on the rear side wall plate of the unmanned helicopter equipment cabin, and its function is to discharge the gas entering the equipment cabin from the equipment cabin.

The advantages of the present invention are:

When the rotor of the unmanned helicopter rotates to generate slipstream, or when the unmanned helicopter is in flight, the airflow outside the body can directly enter the interior of the equipment compartment through the air inlet to cool or heat the equipment. Unmanned helicopter all is in flying state most of the time, so adopts the temperature control system of unmanned helicopter equipment cabin among the present invention, can close fan most of the time, or use fan as little as possible, thereby reduces unmanned helicopter. Reduce the energy consumption of the manned helicopter and improve the overall performance.

Description of drawings

Figure 1 is a schematic diagram of the temperature control system of the unmanned helicopter equipment cabin that can utilize the external airflow.

The meanings of the specific symbols in the figure are as follows:

①Equipment compartment; ②Inlet; ③Air filter; ④Fan; ⑤Electric heater; ⑥Temperature controller in equipment compartment;

detailed description

The present invention will be further described below in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner.

The temperature control system of the unmanned helicopter equipment compartment that can utilize the external airflow has two working modes, namely, the working mode of no relative airflow available from the outside world and the working mode of relative airflow available from the outside world. The basic working principles of the two working modes are as follows:

1. The working mode where there is no relative airflow available outside

When the unmanned helicopter is in the state of ground debugging or ground maintenance, since the ground is stationary and the rotor is not working, there is no available rotor slipstream and no relative airflow formed by forward flight. At this time, the electronic equipment ⑨ in the equipment compartment ① is working normally, so it is necessary to control the temperature in the equipment compartment ①. The basic working principle of the temperature control system in this mode is: the temperature sensor ⑧ transmits the collected temperature information to the equipment compartment temperature controller ⑥, and the equipment compartment temperature controller ⑥ controls the fan ④ and electric heating according to the temperature in the equipment compartment ① The work of device ⑤. When the temperature in the equipment compartment ① is within the normal temperature range, the fan ④ and the electric heater ⑤ are kept off under the control of the temperature controller ⑥ in the equipment compartment; when the temperature in the equipment compartment ① is higher than the temperature limit of the equipment, the fan ④It starts to rotate under the control of the temperature controller ⑥ in the equipment compartment, the electric heater ⑤ remains closed, and the external airflow is introduced into the equipment compartment ① through the air inlet ② and the air filter ③, and is evenly distributed after being blocked by the deflector ⑦. It flows through each electronic equipment ⑨ for heat exchange, and finally exits the equipment compartment ① through the exhaust port ⑩. When the temperature in the equipment cabin ① is lower than the temperature limit of the equipment, the fan ④ starts to rotate under the control of the temperature controller ⑥ in the equipment cabin, and the external airflow is introduced into the equipment cabin ① through the air inlet ② and the air filter device ③, and at the same time The electric heater ⑤ starts to work and heats the air flowing through the electric heater ⑤. The heated air passes through the deflector ⑦ and then evenly flows through each electronic device ⑨ for heat exchange, and finally exits the equipment compartment ① through the exhaust port ⑩ .

2. There is a working mode with relative airflow available outside

When the unmanned helicopter is hovering or flying forward, there is available external airflow under the action of slipstream and forward flying speed. At this time, the electronic equipment ⑨ in the equipment compartment ① is working normally, so it is also necessary to control the temperature in the equipment compartment ①. The working principle of the temperature control system in this mode is the same as the working mode with no external relative air flow available. However, in this working state, the external airflow of the unmanned helicopter is very strong, and the amount of gas flowing into the equipment compartment ① under pressure is also relatively large, which may even be greater than the air intake of the fan ④ when it is working. At this time, the switch of the fan ④ has almost no influence on the air intake of the equipment compartment, so it can always be in the closed state. Therefore, in the case of available external airflow, the fan in the temperature control system of the equipment compartment is basically turned off, and only relies on the pressure of the external airflow to provide cooling or heating airflow to the electronic equipment 9 in the equipment compartment ①.

The invention realizes the temperature control of the unmanned helicopter equipment cabin by opening an air inlet at a suitable position of the skin of the equipment cabin, and installing additional equipment such as a fan, an electric heater, a temperature sensor, and a temperature controller of the equipment cabin. Because the present invention can make full use of the slipstream of the rotor and the relative air flow produced by the forward flight, etc., the air flow outside the cabin of the equipment greatly reduces the working time of the fan in the working process of the unmanned helicopter, saves the onboard energy, and is beneficial to the lifting of the unmanned helicopter. The performance characteristics of the helicopter have certain significance.

Claims (1)

1. a kind of can be included using the depopulated helicopter equipment compartment temperature control system of external air flow：One equipment compartment, one enter QI KOU, air filter, fan, electric heater, equipment compartment temperature controller, one piece of deflector, If dry temperature sensor, some electronic equipments and an air vent, air inlet is located at the front portion of equipment compartment eyelid covering, air filtration Device is arranged on air inlet, and fan is located inside air filter at the air inlet of equipment compartment and passes through cable and equipment compartment Temperature controller connects, and electric heater is installed in series with fan and is connected with equipment compartment temperature controller by cable, equipment compartment Temperature controller is arranged in equipment compartment and is connected with each temperature sensor and fan and electric heater respectively by cable, Deflector is arranged on the rear side of air inlet in equipment compartment, and temperature sensor is distributed in equipment compartment and by cable and equipment compartment temperature Degree controller connects, and electronic equipment is fixed in equipment compartment, and air vent is arranged on the wallboard on rear side of equipment compartment, specifically arranges feelings Condition is as follows：

Described equipment compartment is the independent bay section of depopulated helicopter, positioned at the front portion of depopulated helicopter fuselage, unmanned straight for installing The electronic equipment of the machine of liter and a whole set of temperature control system, and provide protection for all below deck equipments；

Described air inlet is the opening that external air flow enters depopulated helicopter equipment compartment, and the top that its position is located at equipment compartment is covered Skin；

Described air filter is arranged at the air inlet of equipment compartment top eyelid covering, for carrying out to the air in entrance cabin Filter, prevents harmful material access arrangement cabin, the normal work of impact electronic equipment；

Described fan is located inside equipment compartment, is arranged on inside air inlet, by ambient atmos inhalation device cabin during fan work Portion, it is connected with equipment compartment temperature controller by cable, and is controlled by equipment compartment temperature controller；

Described electric heater be located at equipment compartment inside, be arranged on inside air inlet, connect with fan, electric heater pass through cable and Equipment compartment temperature controller connects, and is controlled by equipment compartment temperature controller, and its effect is in equipment compartment temperature controller Under control, heat to by the air in fan access arrangement cabin；

Described equipment compartment temperature controller is arranged in equipment compartment, is the nucleus equipment of equipment compartment temperature control system, its effect It is the temperature information of analysis temperature sensor acquisition, control the work of fan and electric heater according to the temperature conditionss in equipment compartment Make；

Described deflector is arranged in equipment compartment, and position is located at the rear side of air inlet, and deflector is the thin plate of one piece of bending, its work Directly pass through equipment compartment with the air-flow being entry deterrence equipment compartment, behind the air-flow access arrangement cabin flowed backward, in deflector To the front end flowing of equipment compartment under barrier effect, then uniform flowing whole equipment cabin, making the equipment in equipment compartment and gas Stream carries out sufficient heat exchange；

Described temperature sensor is temperature acquisition equipment, is arranged in equipment compartment, and its particular number and installation site will be according to setting The installation site of standby cabin inner electronic equipment and heat condition determine, the basic principle of arrangement be to ensure that can collect true and Comprehensively equipment compartment temperature information, temperature sensor is connected with equipment compartment temperature controller by cable, equipment compartment temperature control Device passes through cable provides power supply to sensor, and the temperature information collecting then is transferred to equipment by cable by temperature sensor Cabin temperature controller；

Described electronic equipment is the Aerial Electronic Equipment of depopulated helicopter, is arranged in equipment compartment, particular number, function and installation position The master-plan demand according to depopulated helicopter of putting determines and treats electronic equipment as thermal source；

Described air vent is arranged in the rear side wall panel of depopulated helicopter equipment compartment, and its effect is by the gas row in access arrangement cabin Go out equipment compartment.