JPS5826172Y2 - Vehicle air conditioner - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air mix type vehicle air conditioner that mixes and blows out hot air that has undergone heat exchange in a heater core and cold air that passes directly through an air passage between the air conditioning case and the heater core. It is an object of the present invention to provide a vehicle air conditioner in which ventilation resistance is not so large and air mixing performance is significantly improved.

This type of air mix type vehicle air conditioner does not have an air mix means in the near mix chamber B immediately downstream of the heater core A, as shown in FIG. 3, as shown in FIG. 4. , warm air a and cold air flow in parallel, and only the part C where both air a + b are in contact are mixed, so the temperature gradient of the blown air, that is, the temperature difference, is large, and the feeling given to the occupants is There are bad drawbacks.

For this reason, conventional methods have been proposed in which an air mixer is installed in the downstream region of the heater core to constrict, bend, or rapidly expand the air in order to improve the air mix performance, but none of these devices have ventilation resistance. is large, so there is a drawback of large pressure loss.

The present invention provides a vehicle air conditioner that has a relatively small ventilation resistance and can significantly increase air mixing performance by having the configuration described in the claims of the above-mentioned utility model registration.

The configuration of the present invention will be explained in detail below based on the drawings.

1 and 2 show an example of the implementation of the present invention, and the air conditioner according to the present invention has a heater core 2 disposed inside an air conditioning case 1, and a heat exchange room 3 having the heater core 2. A sub-tact 4 is provided between the wall and the upper wall of the air conditioning case.

A damper 5 is attached to the heater core 2, so that the air inflow opening of the core 2 and the sub-duct 4 can be opened and closed to any degree of opening.

An air mix chamber 6 is formed immediately downstream of the heater core 2, the sub duct 4 is also communicated with the air mix chamber 6, and the main duct 1 is connected downstream of the air mix chamber 6.

Inside the above-mentioned air mix chamber 6, both front and rear ends 8.
A cylindrical air mix guide 10 with an opening 9 is arranged, the front end 8 communicates with and is fixed to the heat exchange chamber 3, and the rear end 9 communicates with and is fixed to the main duct 7.

That is, in the illustrated example, the interior 11 of the air mix guide 10 is a flow path for the warm air a that has passed through the heater core 2,
A gap 13 exists between the outer circumferential portion 12 and the air mix chamber 6, which serves as a flow path for cold air that does not pass through the heater core 2.

Of course, by arranging the heater core on the side corresponding to the sub-duct 4, the flow paths of the hot air a and the cold air may be reversed.

A plurality of cylindrical pipes 14 shown in FIGS. 1 and 2 are arranged inside the interior 11 of the air mix guide 10 described above.

This pipe 14 is connected to the inside 11 of the air mix guide 10.
The upper end 1 of each pipe 14 is arranged perpendicularly to the flow of hot air a flowing into the
5 and the lower end 16 are the outer peripheral portion 1 of the air mix guide 10.
2 is opened in the outer circumferential wall 11 forming the outer circumferential wall 11.

Therefore, the inner cavity of the pipe 14 is communicated with the aforementioned gap 13 through the openings at the upper end 15 and lower end 16.

In addition, each pipe 14 has a plurality of pipes, as shown in FIGS. An air outlet 19 is provided.

Since the air conditioner according to the present invention has the configuration described above, if the damper 5 is set in the state shown in FIG. It flows into the interior 11 of the guide 10 through the front end 8 of the guide 10, hits the pipe 14 as shown in FIG. , the current flows in a nearly rectified state.

At the same time, the cold air diverted by the damper 5 is
The air flows into the gap 13 portion of the air mix chamber 6 through the pipe 14 from the upper end 15 and lower end 16 of the pipe 14.
4 and is blown out from each air blowing hole 19.

As mentioned above, since negative pressure is generated in the part where the air outlet 19 is opened as the hot air a flows down, suction negative pressure is generated when the cold air is blown out from the air outlet 19. is in effect, and the air blows out extremely smoothly.

The cold air is divided into pieces by the plurality of air blowing holes 19, and flows in parallel between the streams of the hot air a that are finely divided by the pipes 14.
The mix of air and cold air becomes significantly better, and only a complete mix of air flows into the main duct 7.

Note that since the plurality of pipes 14 are present across the flow of hot air a, ventilation resistance appears to be large;
The fact that the pipes 14 are cylindrical has a negative pressure generated on the downstream side of each pipe 14, and this negative pressure has the effect of sucking out the cold air, so the ventilation resistance due to the presence of the pipes 14 is a problem for the overall system. It does not increase as much.

Furthermore, since cold air flows into the pipe 14 from both openings at the upper end 15 and lower end 16, if the sum of the opening areas of both openings is defined as a dog, it flows into the air mix chamber 6 from the sub-tact 4, and from the pipe 14. The ventilation resistance of the system flowing into the inner cavity can be made close to zero even if the air mix guide 10 is present.

As explained above, according to the present invention, the pipe arranged in the air mix guide is cylindrical, generates negative pressure on the downstream side, and the total opening area of the openings at both the upper and lower ends of the pipe is As a result, it is possible to mix hot and cold image styles well without increasing the ventilation resistance.

In addition, multiple cylindrical pipes are arranged to intersect with the air flow flowing into the air mix guide, and although the air flow is finely divided, the pipes are cylindrical so that the air flow remains generally straightened. In addition, the air flowing into the pipe is subdivided and blown out from multiple air blowing holes, and the synergistic effect of flowing in parallel between the other air flows divided by the aforementioned pipes causes heating and cooling. It also has the effect of significantly improving the air mix of the painting style.

[Brief explanation of the drawing]

Fig. 1 is a roadside longitudinal sectional view of an example of the implementation, Fig. 2 is a perspective view showing only the main pipe group, Fig. 3 is a roadside longitudinal sectional view of an example of a conventional device, and Fig. 4 is a roadside longitudinal sectional view of an example of the conventional device. FIG. 4 is a schematic diagram for explaining the operation of the device shown in FIG. 3; 1: Air conditioning case, 2: Heater core, 6: Air mix chamber 8, 9: Both front and rear ends of air mix guide, 1
0: Air mix guide, 11: Inside, 12: Outer periphery,
14...pipe, 15: upper end, 16: lower end, 17: outer peripheral wall, 18: pipe peripheral wall, 19: air blowing hole.

Claims (1)

[Scope of utility model registration request] In an air mix type air conditioner that blows out a mixture of hot air that has undergone heat exchange in the heater core and cold air that passes directly through the air flow path between the air conditioning duct and the heater core, there is a A cylindrical air mix guide with both ends open is disposed, and the inside and outer circumference of the air mix guide serve as flow paths for either the warm air or the cold air. Inside the guide, a plurality of cylindrical pipes intersect with the flow of air flowing into the guide and are arranged at appropriate intervals from each other, and both ends of the pipes are connected to the air flow. A vehicle air conditioner characterized in that a plurality of air blowing holes are opened in the outer peripheral wall of the mix guide, and a plurality of air blowing holes are opened in the peripheral wall of the pipe on the downstream side of the air flow flowing into the air mix guide. Device.