CN210970606U - New energy automobile air conditioner tail suction type air inlet system - Google Patents

Abstract

The utility model provides a new energy automobile air conditioner tail suction type air intake system, including automobile body, controlling means, first air intake, air pipe, suction fan and air outlet, controlling means sets up in automobile body, and controlling means is connected with suction fan electricity, and first air intake sets up in automobile body's fin department, and air pipe sets up in automobile body's inside of roof, and the air outlet sets up on the roof, and air pipe's one end and first air intake intercommunication, air pipe's the other end and air outlet intercommunication, suction fan set up on air pipe. The utility model discloses a first air intake sets up in the fin department of car body, keeps away from the heat source, and the filth and the mould of air in the reducible car improve the air freshness to the air current that circles round is admitted air, reduces the consumption that inhales the fan, can the energy can be saved.

Description

New energy automobile air conditioner tail suction type air inlet system

Technical Field

The utility model belongs to the new energy automobile field especially relates to a new energy automobile air conditioner tail inhales formula air intake system.

Background

The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source, integrates the new technology in the aspects of power control and driving of the automobile, and has advanced technical principle, new technology and new structure. New energy vehicles comprise pure electric vehicles and plug-in hybrid electric vehicles, the driving range of a power battery of the new energy vehicles is limited, and energy conservation and power saving are one of design targets of the new energy vehicles.

The external circulation of the existing new energy automobile air conditioner air inlet system on the market is generally that an air inlet is arranged below a window wiper of an automobile, the air inlet of fresh air required for breathing is not separated from the external circulation air inlet of air conditioner refrigeration and heating, and the distance between the external circulation air inlet of the air conditioner refrigeration and heating and a heat source (such as a driving motor, an air conditioner radiator, a motor controller, an engine and the like) is relatively short, so that the amount of dirt and mould in the air inlet is large, the freshness of the air entering the automobile is very low, and the comfort level of passengers is reduced. In addition, the power battery of the existing new energy automobile has limited storage capacity, and the air conditioner needs to consume electric energy when working, and especially when the automatic air conditioning mode and the external circulation mode are used, the consumption of the electric energy is greatly increased, so that the purpose of effectively saving energy can not be achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a new energy automobile air conditioner tail inhales formula air intake system can improve passenger's comfort, improves the new freshness of air in the car, can effectively the energy can be saved simultaneously.

In order to realize the above-mentioned purpose, the utility model provides a new energy automobile air conditioner tail suction type air intake system, including car body, controlling means, first air intake, air pipe, suction fan and air outlet, controlling means set up in the car is originally internal, controlling means with the suction fan electricity is connected, first air intake set up in car body's fin department, air pipe set up in the inside of car body's roof, the air outlet set up in on the roof, air pipe's one end with first air intake intercommunication, air pipe's the other end with the air outlet intercommunication, suction fan set up in on the air pipe.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a first air intake sets up in the fin department of car body, and first air intake is separately with the outer circulation air intake of original air conditioner refrigeration heating, and keep away from heat sources such as car driving motor, air conditioner radiator, motor controller and engine, can reduce filth and mould etc. in the air that gets into the car, improves the fresh degree of air in the car, and because first air intake sets up in the fin department of car body, can utilize the air intake of whirling about the current, saves the power consumption of inhaling the fan, the utility model discloses make the air that gets into the car body fresher, and the quantity of filth and mould is still less, can improve passenger's comfort level, cancelled the outer circulation air intake of original car, make new energy automobile (under the same operating mode) air conditioner open under the condition of same setting, the utility model can effectively save the electric energy, and guarantee the fresh degree of air in the car, meanwhile, the power consumption of the suction fan can be further reduced by utilizing the whirling airflow for air intake.

Preferably, the air intake system is inhaled to new energy automobile air conditioner tail still includes and is used for the solar panel who inhales the fan and provide the electric energy, solar panel set up in on the automobile body. This scheme is through setting up solar panel on automobile body, and automobile body can utilize solar panel to convert solar energy into the electric energy to for inhaling the fan provides the electric energy, if there is remaining electric energy, then store this part remaining electric energy in automobile body's battery, provide the energy for other parts of automobile body, the utility model discloses a new energy automobile air conditioner tail is inhaled formula air intake system and is need not to utilize automobile body's battery power supply, and utilizes solar panel to produce the electric energy and provide the electric energy for inhaling the fan, can further save the energy, can make new energy automobile's low pressure battery's use more lasting, increases new energy automobile's continuation of the journey mileage.

Preferably, the solar panel is disposed at a rear window of the vehicle body and/or a sunroof of the vehicle body. This scheme sets up solar panel in rear window department and/or skylight department, no matter be when the driving or when parkking, can both utilize solar panel to convert solar energy into the electric energy, and furthest guarantees can directly provide the electric energy for the suction fan in the new energy automobile air conditioner tail suction type air intake system through the produced electric energy of solar panel, and remaining electric energy can be saved and supply the car to use in the battery of car, and is effective energy-conserving, and environmental protection more.

Preferably, an air conditioner adjusting button is arranged on the control device. This scheme makes temperature, humidity and wind speed etc. that can adjust the air conditioner through the air conditioner adjustment button on the controlling means, and the passenger can adjust according to the demand of oneself to guarantee to feel comfortable in the car.

Preferably, the air intake system is inhaled to new energy automobile air conditioner tail still includes the second air intake, the second air intake set up in the skylight department of automobile body, the second air intake with air pipe intercommunication. According to the scheme, when the tail suction type air inlet system of the new energy automobile air conditioner is started, enough fresh air can be ensured to enter the automobile.

Preferably, a one-way valve is arranged between the second air inlet and the ventilation pipeline. According to the scheme, when the first air inlet is used for air inlet, fresh air is prevented from escaping from the second air inlet, and the fresh air can enter the air outlet.

Preferably, the air intake system is inhaled to new energy automobile air conditioner tail still includes the main entrance, the one end of main entrance with first air intake intercommunication, the other end of main entrance with air pipe intercommunication.

Preferably, the air-conditioning tail suction type air intake system of the new energy automobile further comprises a bypass channel, the bypass channel is connected with the main channel in parallel, one end of the bypass channel is communicated with the first air inlet, and the other end of the bypass channel is communicated with the ventilation pipeline. This scheme can be when the outer air quality of car is poor through setting up bypass channel, the passageway that the conversion air passed through to do purification treatment to the air, guarantee that the interior air is fresh.

Preferably, air purification devices are arranged on the main channel and the bypass channel. This scheme is through being equipped with air purification device on main entrance and bypass passageway and guarantee that the air that gets into from first air intake all purifies the air no matter gets into the air supply passage through main entrance or through bypass passageway, guarantees the quality of the air that gets into in the car, improves passenger's comfort level.

Preferably, the air cleaning device of the main channel is used for filtering dust, and the air cleaning device of the bypass channel is used for filtering harmful gas.

Preferably, the air-conditioning tail suction type air intake system of the new energy automobile further comprises a sensor for monitoring air quality, the sensor is arranged at the initial end of the main channel and is electrically connected with a control device, and the control device receives signals of the sensor and controls the opening and closing of the main channel and the bypass channel. This scheme carries out air quality monitoring to the air that gets into from first air intake through the sensor, if the air of normal quality, controlling means makes the main entrance open after receiving the signal of sensor passback, the bypass passageway is closed, the air directly gets into in the air pipe and carries to the air outlet through the main entrance, if the air that is the relatively poor quality, controlling means makes the main entrance close after receiving the signal of sensor passback, the bypass passageway is opened, the air gets into the bypass passageway, get into in the air pipe and carry to the air outlet after carrying out corresponding processing in the bypass passageway, guarantee that the fresh air quality of the air in the car is good.

Preferably, the sensor is a photoelectric air quality sensor. The photoelectric air quality sensor is selected as the sensor for monitoring the air quality, the quality of the air can be effectively and accurately monitored, signals are transmitted to the control device, the control device correspondingly processes the signals, and the quality of the air in the vehicle is guaranteed.

Drawings

Fig. 1 is a schematic diagram of an air-conditioning intake system of a conventional new energy automobile.

Fig. 2 is a schematic structural diagram of the first embodiment of the tail suction type air intake system of the new energy automobile air conditioner of the present invention.

Fig. 3 is a schematic diagram of the air intake and exhaust process of the first embodiment of the air intake system of the new energy automobile air conditioner tail suction type according to the present invention.

Fig. 4 is an enlarged view of fig. 3 at F.

Fig. 5 is a schematic structural diagram of a solar panel according to a first embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a second embodiment of the tail suction type air intake system of the new energy automobile air conditioner of the present invention.

Fig. 7 is an air inlet process schematic diagram of the second embodiment of the air intake system is inhaled to new energy automobile air conditioner tail.

Fig. 8 is a schematic structural view of a solar panel according to a second embodiment of the present invention.

Detailed Description

In order to clearly understand the technical features, objects and effects of the present invention, the detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Referring to fig. 2 to 5, the present invention provides a new energy automobile air conditioning tail suction type air intake system 100, which includes an automobile body 10, a control device (not shown), a first air inlet 101, a ventilation duct 103, a suction fan 104 and an air outlet 105, wherein the control device is disposed in the automobile body 10, the control device is an air conditioning control computer of the automobile body 10, the control device is electrically connected to the suction fan 104, the first air inlet 101 is disposed at a tail wing 10a of the automobile body 10, more specifically, the first air inlet 101 is disposed at a corner of the tail wing 10a (i.e., a position a in fig. 2), the ventilation duct 103 is disposed inside a ceiling of the automobile body 10, the suction fan 104 is disposed in the ventilation duct 103, the air outlet 105 is disposed on the ceiling of the automobile body 10 and is communicated with the inside of the automobile body 10, and the air outlet 105 is compared with, nearer apart from passenger's face, can improve passenger's facial air circumstance faster, the one end and the first air intake 101 of ventilation pipe 103 are linked together, and the other end and the air outlet 105 of ventilation pipe 103 are linked together, and the passenger passes through when controlling means opened the car and advanced fresh air, controlling means received the back control and inhaled fan 104 operation, inhales the air from first air intake 101, and the air is followed air outlet 105 outflow and is got into in the car behind ventilation pipe 103, makes and can sneak into fresh air in the car. The first air inlet 101 is disposed at a corner of the tail wing 10a, so that noise can be prevented, air can be drawn by using a swirling air flow, and energy consumption of the suction fan 104 can be reduced.

Referring to fig. 1, an air inlet 201 of an external circulation of an air-conditioning intake system 200 of a commercially available new energy vehicle is located below a front windshield and is very close to a heat source (such as a driving motor, an air-conditioning radiator, a motor controller, an engine, and the like), and the air inlet 201 of the external circulation and an air inlet of an air-conditioning cooling and heating are the same air inlet, so that the amount of dirt and mold at the air inlet 201 is large, the freshness of air entering the vehicle is very low, and the comfort of passengers is reduced. The utility model discloses a new energy automobile air conditioner tail suction type air intake system 100 compares with it, original extrinsic cycle air intake 201 has been cancelled, and set up first air intake 101 in the corner of fin 10a, keep away from the heat source with first air intake 101, and the air inlet separation that heats with air cooling, first air intake 101 is the special admission passage of fresh air, can effectively reduce filth and the mycotic quantity in the car interior air, and make the inspiratory air of passenger more fresh nature. The internal circulation of the original vehicle is not changed, as shown by the arrows in fig. 1, the arrows at the corresponding positions in fig. 2 also indicate the internal circulation of the vehicle body 10, and it can be seen that the internal circulation mainly improves the comfort of the body part of the passenger, and the air outlet 105 is arranged on the ceiling of the vehicle body 10, and is closer to the face of the passenger, so that the air freshness, temperature and humidity of the face of the passenger can be improved more quickly, and the aim of refreshing the face is fulfilled. Meanwhile, the original external circulation is cancelled, so that the electric quantity of the new energy automobile can be saved by 20%.

Referring to fig. 2 to 5, in order to fully utilize solar radiation at the rear windshield of the vehicle body 10, the rear suction type air intake system 100 of the new energy vehicle further includes a solar panel 102, the solar panel 102 is mounted on the vehicle body 10, in this embodiment, in order to ensure driving safety, the solar panel 102 is only disposed at the rear windshield of the vehicle body 10, specifically, the solar panel 102 having a width of about 5cm and a length of about 140cm is disposed on the rear windshield of the vehicle body 10, two solar panels 102 are disposed, one solar panel is disposed at an upper edge of the rear windshield of the vehicle body 10, the other solar panel is disposed below the first solar panel 102, the solar panel 102 located below can be pulled down and retracted, during driving, in order to ensure driving safety, the solar panel 102 is prevented from blocking the view, and the solar panel 102 located below is retracted, only the solar panel 102 on the upper edge absorbs solar energy in the driving process, converts the solar energy into electric energy and provides the electric energy for the suction fan 104; after the driving is finished and the vehicle is locked, the collected solar panels 102 can be pulled down and spread, the two solar panels 102 absorb solar energy together to generate power, the generated electric energy is used for sucking the fan 104 to operate, and if the residual electric energy exists, the generated electric energy is stored in the storage battery of the vehicle body 10 and can be used for supplying power to other positions of the vehicle body 10.

Specifically, generally, the control device is disposed near the driver's seat or at each seat, and the new energy automobile air conditioning rear suction type air intake system 100 can be controlled by the driver as a whole or by each passenger, and more specifically, the control device near the driver's seat is emptyThe control computer is controlled by a controller, the controller arranged on each seat can be a simplified controller, the air-conditioning controller controls the operation of the air-conditioning tail suction type air intake system 100 of the new energy automobile and can also perform other automobile control operations, and the simplified controller can only adjust the corresponding temperature, humidity and other parameters of the air outlet 105 at the corresponding position generally in this embodiment, the controller is provided with an air-conditioning adjusting button which specifically comprises an air temperature adjusting button, an air humidity adjusting button, a fragrance adjusting button, a wind speed adjusting button and a natural/purified negative ion adjusting button, and can be adjusted to a comfortable state by using different buttons according to needs, more specifically, the temperature adjusting range is 20-28 ℃, the humidity adjusting range is 50-70%, the wind speed adjusting control is in a range less than 0.5m/s, the wind speed is too high, the discomfort of passengers can be caused, even the passengers can be ill, and the total ventilation volume of the air outlet × is larger than 20m and the flow rate is larger than 20 m/s³Human,/h. The passenger utilizes the air temperature adjusting button to adjust the air temperature, and after the control device receives an adjusting instruction, the air cooled or heated in the internal circulation pipeline of the automobile body 10 enters the tail suction type air inlet system 100 of the new energy automobile air conditioner through the column A of the automobile body 10, so that the temperature adjusting effect is achieved.

In addition, since the temperature is the airflow gradient of the upper and lower layers, during the cooling, the temperature of the lower layer is low (when the first air inlet 101 is not opened, fresh air is not mixed in and the internal circulation is full cold air blown out), in order to control the temperature in the vehicle between 20 ℃ and 28 ℃, and in order to ensure that the temperature difference between the upper layer and the lower layer in the vehicle is not large, a temperature sensor (not shown) is installed on the top of the seat in the vehicle body 10, the temperature sensor is electrically connected with the air-conditioning control computer, the temperature sensor transmits a temperature signal to the air-conditioning control computer, and the air-conditioning control computer correspondingly adjusts the air intake quantity of the internal circulation cold air or heat of the vehicle body 10 and the fresh air.

Referring to fig. 3, in the present embodiment, the number of the air outlets 105 is four, two air outlets 105 are disposed at the front row of the automobile body 10, two air outlets 105 are also disposed at the rear row, and in order to ensure that the air entering from the first air inlet 101 can reach the air outlets 105 at the front row, a suction fan 104 is disposed at the ventilation duct 103 between the front discharge air outlet 105 and the rear discharge air outlet 105, and a suction fan 104 is also disposed between the connection between the ventilation duct 103 and the first air inlet 101, and the number of the suction fans 104 at the connection is two, so as to ensure the normal operation of the air-conditioning rear suction type air intake system 100 of the new energy automobile.

Referring to fig. 3 and 4, a section of main channel 106 is further disposed between a connection portion of the ventilation duct 103 and the first air inlet 101, one end of the main channel 106 is communicated with the first air inlet 101, the other end of the main channel 106 is communicated with the ventilation duct 103, the new energy automobile air conditioning tail suction type air intake system 100 further includes a bypass channel 107, the bypass channel 107 is connected in parallel with the main channel 106, similarly, one end of the bypass channel 107 is communicated with the first air inlet 101, the other end of the bypass channel 107 is communicated with the ventilation duct 103, an air purification device 106a is disposed on the main channel 106, an air purification device 107a is also disposed on the bypass channel 107, specifically, the air purification device 106a on the main channel 106 includes an air cleaner, a negative ion generator and a high-pressure ionization purification device, the air purification device 107a on the bypass channel 107 includes an air cleaner, an activated carbon adsorber, and an air purification, A harmful gas catalyst and an electrostatic air filter, and a sensor 106b (the position is shown in fig. 4) is arranged at the initial end of the main channel 106, the sensor 106b is used for monitoring the air quality, the sensor 106b is electrically connected with the control device, in this embodiment, the sensor 106b is a photoelectric air quality sensor, of course, other types of air quality sensors can be adopted, the sensor 106b detects the air quality of the air after the air passes through the first air inlet 101, when the air quality is better, the sensor 106b transmits a signal with good air quality to the control device, the control device opens the main channel 106, closes the bypass channel 107, the air entering the main channel 106 is purified by the air purifying device 106a of the main channel 106, sucked by the suction fan 104 and transmitted to the ventilation duct 103, and part of the air enters the vehicle from the air outlet 105 of the rear exhaust after passing through the ventilation duct 103, the other part of the air is conveyed to the air outlet 105 of the front row through the suction fan 104 between the air outlet 105 of the front row and the air outlet 105 of the rear row; when the air quality is poor, the sensor 106b transmits a signal of poor air quality to the control device, the control device switches the air circulation channel from the main channel 106 to the bypass channel 107, the air entering the bypass channel 107 is purified by the air purification device 107a of the bypass channel 107, then is sucked by the suction fan 104 and is transmitted into the ventilation pipeline 103, part of the air enters the vehicle from the air outlet 105 of the rear exhaust after passing through the ventilation pipeline 103, and the other part of the air is conveyed to the air outlet 105 of the front exhaust through the suction fan 104 between the air outlet 105 of the front exhaust and the air outlet 105 of the rear exhaust; when the air quality is very poor, if the air quality is in dense smoke or dust, the first air inlet 101 is closed, and because the first air inlet 101 is arranged at the corner of the tail wing 10a of the automobile body 10, the first air inlet 101 faces downwards, and a plurality of positions are bent up and down, the entry of harmful particles, dense smoke, dust and other substances can be effectively prevented, and the entry of rainwater can be avoided as much as possible when raining.

With reference to fig. 2 to 5, the operation process of the new energy automobile air conditioner tail suction type air intake system 100 of the present invention is as follows: when a passenger opens the new energy automobile to enter fresh air, the electric energy generated by the solar panel 102 supplies power to the suction fan 104, the suction fan 104 is started to operate, air enters from the first air inlet 101 and passes through the main channel 106 or the bypass channel 107, and the suction fan 104 respectively conveys the air to the front-row air outlet 105 and the rear-row air outlet 105, so that the air in the automobile is updated. If there is surplus electric power (except for all the electric power required for the normal operation of the suction fan 104), this part of the electric power is stored in the battery of the automobile body 10 to supply the other parts of the automobile body 10 with electric power. After the automobile stops running, when the sun is present, the solar panel 102 continuously absorbs solar energy and converts the solar energy into electric energy, and the electric energy is stored in the storage battery. This provides energy to all of the suction fan 104, even in the absence of the sun, by utilizing the electrical energy previously stored in the battery by the solar panel 102.

Under the same vehicle operating mode, and the air conditioner opens under the condition of the same setting, cancel the original extrinsic cycle of automobile body 10, can save the electric quantity that is greater than 20%, and because the first air intake 101 of fresh air sets up in automobile body 10's fin 10a department, usable whirly air current admits air, can further save the consumption of inhaling fan 104, and utilize solar panel 102 can supply power for each part in whole new energy automobile air conditioner tail suction type air intake system 100, make the new energy automobile environmental protection more, and the power saving.

Referring to fig. 6 and 7, different from the first embodiment, in the present embodiment, the automobile body 10 has a skylight 10B, a second air inlet 108 is disposed at the skylight 10B of the automobile body 10, a specific location of the second air inlet 108 is a location B in fig. 6, the second air inlet 108 is disposed at an inclined vent of the skylight 10B, and air can be taken in by utilizing a swirling air flow, so as to further reduce energy loss of the suction fan 104, specifically, the second air inlet 108 is communicated with the ventilation duct 103, a check valve 109 is disposed between the second air inlet 108 and the ventilation duct 103, the check valve 109 can prevent fresh air entering from the first air inlet 101 from escaping from the second air inlet 108, the suction fan 104 is also disposed between the second air inlet 108 and the ventilation duct 103, and similarly, an air purification device may be disposed at the second air inlet 108, and air enters from the second air inlet 108, the air enters the ventilation duct 103 through the air purification device at the second air inlet 108, and then the air is conveyed to the air outlet 105 by the suction fan 104 on the ventilation duct 103 and enters the automobile body 10.

Referring to fig. 8, unlike the first embodiment, in order to fully utilize the solar energy at the rear windshield and the skylight 10b of the automobile body 10, in the present embodiment, in addition to the solar panel 102 disposed at the rear windshield of the automobile body 10, the solar panel 102 is also disposed at the position of the skylight 10b of the automobile body 10, and the size of the solar panel 102 is slightly smaller than the area of the skylight 10b, so that the solar panel 102 at the skylight 10b replaces the sun visor under the original skylight 10b, during the driving of the automobile, the passenger can select whether to spread the solar panel 102, and after the automobile stops and locks the automobile, the solar panel 102 is spread to absorb the solar energy to generate electricity.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto. Within the scope of the concept of the present invention, corresponding changes can be made reasonably. Therefore, the protection scope of the present invention should be subject to the claims.

Claims (10)

1. The utility model provides a new energy automobile air conditioner tail suction type air intake system, a serial communication port, include automobile body, controlling means, first air intake, air pipe, inhale fan and air outlet, controlling means set up in the automobile is originally internal, controlling means with inhale the fan electricity and connect, first air intake set up in automobile body's fin department, air pipe set up in the inside of automobile body's roof, the air outlet set up in on the roof, air pipe's one end with first air intake intercommunication, air pipe's the other end with the air outlet intercommunication, inhale the fan set up in on the air pipe.

2. The air conditioning tail suction type air inlet system of the new energy automobile as claimed in claim 1, further comprising a solar panel for supplying electric power to the suction fan, wherein the solar panel is disposed on the automobile body.

3. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 2, wherein the solar panel is disposed at a rear window of the automobile body and/or a skylight of the automobile body.

4. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 1, further comprising a second air inlet, wherein the second air inlet is disposed at a skylight of the automobile body, and the second air inlet is communicated with the ventilation duct.

5. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 4, wherein a one-way valve is arranged between the second air inlet and the ventilation duct.

6. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 1, further comprising a main passage, wherein one end of the main passage is communicated with the first air inlet, and the other end of the main passage is communicated with the ventilation duct.

7. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 6, further comprising a bypass channel, wherein the bypass channel is connected in parallel with the main channel, one end of the bypass channel is communicated with the first air inlet, and the other end of the bypass channel is communicated with the ventilation duct.

8. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 7, wherein an air cleaning device is arranged on each of the main channel and the bypass channel.

9. The air conditioning tail suction type air inlet system of the new energy automobile as claimed in claim 8, wherein the air cleaning device of the main channel is used for filtering dust, and the air cleaning device of the bypass channel is used for filtering harmful gas.

10. The air conditioning tail suction type air intake system of the new energy automobile as claimed in claim 7, further comprising a sensor for monitoring air quality, wherein the sensor is arranged at the initial end of the main channel, the sensor is electrically connected with a control device, and the control device receives signals of the sensor and controls the opening and closing of the main channel and the bypass channel.

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