JPH03104771A - Drainage device of car airconditioner - Google Patents

Abstract

PURPOSE:To hold a car body airtight and provide smooth drainage of water by closing a drain path by a drainage valve and an airtight valve in accordance with variation in the external pressure of car, and exhausting the drain water with the drain head at steady time. CONSTITUTION:A drain water exhausting hole 12a is provided in a cover 1 and an upper lid 12, and a drainage valve 15 is arranged in a lower lid 14 fitted to the upper lid 12 through a spacer 13 in such a way as mating with the hole 12a. In the drainage valve 15 the drain head is received by its surface on the cover 1 side, while the external surface receives the outer air pressure from an opening 14a in the lower lid 14. When the drain head staying within the cover 1 exceeds the atmospheric pressure, the hole 12a is opened, and the drain water is exhausted from another hole 14b in the lower lid 14. An airtight valve 16 is installed between this and another hole 12b bored in the upper lid 12 mating with the hole 14b in the lower lid 14, and the hole 12b is coupled with the suction hole of an intra-room fan through a pipe 17. Therefore, the hole 12a is closed by the drainage valve 15 when the outer air pressure rises abruptly and also the hole 12b is shut by this airtight valve 16. Thus airtightness is achieved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drain discharge device for a vehicle air conditioner a.
This invention relates to a drain discharge device for an empty fI4 device particularly suitable for railway cars running at high speeds.

[Conventional technology]

BACKGROUND ART In air conditioners installed in railway vehicles, many efforts have been made to create a structure that smoothly drains condensed water that condenses on an indoor heat exchanger. For example, a structure in which a wind panel with a hole for drainage from an indoor heat exchanger is installed in the frame of the air conditioner, and drainage is drained from the hole (
Utility Model Application Publication No. 55-83412) is known. In addition, in general air conditioners, the drain in the drain receiver is pumped to the upper part using a drain pump, and the drain is drained.
No. 895 (KoN), etc. are known.

[Problem to be solved by the invention]

In recent years, railway vehicles have begun to travel at high speeds, and a phenomenon has occurred in which the pressure outside the vehicle rapidly fluctuates while traveling in a tunnel.

In particular, when trains pass each other in a tunnel, the above-mentioned external pressure fluctuations become significant. For this reason, in vehicles traveling at high speed, the vehicle body is constructed to be airtight to prevent pressure fluctuations outside the front of the vehicle from propagating to the vehicle body. However, sufficient consideration has not been given to the drain discharge structure of the above-mentioned air conditioner. That is, even though the vehicle body has an airtight structure, sufficient airtightness cannot be ensured because a hole is provided for draining water. Furthermore, there was a risk that pressure fluctuations outside the vehicle would occur during draining, causing the drain to flow backwards and blow out, forming a mist that would be sucked into the indoor fan and sent into the cabin.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drain discharge structure for a vehicle air l1 device that has a simple structure, can drain smoothly, and can ensure airtightness of the vehicle body.

[Means to solve the problem]

In order to achieve the above object, there is provided a drain valve which is installed in a part where the drain generated from the indoor heat exchanger can be collected so that the drain can be discharged, and which discharges the drain which is closed due to the difference between the drain water head and the outside pressure, and the drain valve. installed on the downstream side of the drain flow path,
It is constructed of an airtight valve that opens and closes depending on the difference between the suction side pressure of the indoor fan and the outside air pressure, and closes the drain passage when the outside air pressure is lower than the indoor fan suction side pressure.

[Function] The drain valve opens and drains the drain when the drain water head overcomes the atmospheric pressure. Therefore, the drain is drained when a certain amount of condensate accumulates, that is, an amount that produces a head that overcomes atmospheric pressure. By the way, when vehicles pass each other in a tunnel while traveling at high speed, the pressure outside the vehicle increases once and then rapidly decreases after the vehicles pass each other. In such a state, the drain valve temporarily closes due to an increase in pressure outside the vehicle, that is, outside air pressure, and
After that, it will be omitted.

On the other hand, the airtight valve opens and closes depending on the difference between the suction pressure of the indoor fan and the outside air pressure, and closes when the outside air pressure is low, so the airtight valve closes the drain flow path after vehicles pass each other.

As described above, the structure is such that the drain flow path is closed by the drain valve and the airtight valve in response to fluctuations in the external pressure of the vehicle, and the drain is drained by the drain water head during normal conditions.

〔Example〕

Hereinafter, a bird example of the present invention will be explained with reference to FIGS. 1 to 8. In the figure, 1 is a cover that covers the outer periphery of the air a + device, and the part where the indoor heat exchanger 3 is installed has a structure that also serves as a drain receiver. 2 sends return air from the cabin or a mixture of the return air and fresh air to the air heat exchanger 3 via the return 05 and filter 4, and sends the heat-exchanged conditioned air from the discharge port 6 to a duct, etc. This is an indoor fan that is supplied to the guest room via. 1
0 is a drain discharge mechanism installed in a portion of the cover 1 that forms the drain receiver.

The drain discharge mechanism will be described in detail below.

D is an upper lid having a hole 12m that corresponds to the hole formed in the cover 1 for drainage.

A lower portion 114 is provided on the outside of the upper lid 1 with a smoother portion 13 interposed therebetween. The bolts are mounting holes for mounting the upper cover n, spacer l3, and lower cover 1 to the cover 1 using bolts or the like. Takumi is above! ! This drain valve is installed corresponding to the ratio hole 12a, and is arranged so that the surface on the cover 1 side receives the drain water head, and the outside surface receives the external pressure. In addition, at the position corresponding to the drain valve 15 of the lower lid 14,
An opening 14m is formed for transmitting external pressure to the drain valve 15. Therefore, when drain accumulates in the cover 1 and the head of water received by the drain valve 15 exceeds atmospheric pressure, the hole 12a is opened, passes through the gap between the upper j 112 and the drain valve 15, and the drain valve 15 passes through the gap provided in the lower is discharged from the hole 14b. 16 is an airtight valve provided between the upper lid rim and the lower lid 14 in correspondence with the hole 12b provided in the upper lid twist. Lower 1
! The hole 14b is installed at a position corresponding to the air valve 16 of 114.

In other words! The airtight valve l6 described in III is installed on the downstream side of the drain tiL path than the drain valve l5. by the way,
A pipe 17 is connected to the hole 12b, and a hose 11 is connected through a band 19, and the other end of the hose 11 is installed at the air suction port of the indoor fan 2.

That is, the suction side pressure of the indoor fan 2 acts on the surface of the airtight valve l6 on the cover 1 side, and the outside air pressure acts on the outside.

In such a configuration, the drain generated from the indoor heat exchanger 3 accumulates on the inner surface of the cover l. Then, in a state where the head of the drain applied to the drain valve 15 overcomes the external pressure, the drain valve 15 opens.

On the other hand, since the suction side pressure of the indoor fan 2 is lower than the outside pressure, the airtight valve 16 is in close contact with the hole l2b side and the airtight valve 16 is in close contact with the hole l2b side.
is omitted. Therefore, the drain that has passed through the drain valve is discharged to the outside of the vehicle from the hole 14b.

Next, when the vehicle enters a tunnel and passes an oncoming vehicle, the pressure outside the vehicle increases. At this time, the drain valve 15 closes the hole 12m because the outside pressure increases. On the other hand, since the hole 12b is closed by the airtight valve 16, airtightness inside the vehicle can be ensured.

After the vehicles rub against each other, the pressure outside the vehicle suddenly becomes negative.

At this time, the airtight valve 16 closes the hole 14b because the vehicle pressure becomes lower than the suction side pressure of the front indoor fan 2. At the same time, the drain valve also closes the 14 m hole, ensuring airtightness in the room.

Incidentally, when the vehicles pass each other in a tunnel, the pressure outside the vehicle undergoes particularly large fluctuations, and the fluctuations recover in a short period of time. Therefore, problems such as a large amount of drainage accumulating inside the cover 1 and leaking into the passenger compartment will not occur.

According to this configuration, the drain valve and the airtight valve 16 have a structure that opens and closes depending on the pressure difference acting on their respective surfaces, and the structure is simple without using any special control means, and smooth drainage is achieved. It is possible to ensure the discharge and airtightness of the air. Furthermore, since the structure is very similar to that of a car, reliability in its operation can be ensured compared to a structure equipped with a control mechanism. Furthermore, since the drain valve 15 and the airtight valve 16 are structured to operate based on the difference between the drain water head and the external pressure, and between the suction side pressure of the indoor fan 2 and the external pressure, they operate directly based on the pressure difference. and has good responsiveness.

〔Effect of the invention〕

As described above, according to the present invention, drain can be smoothly discharged with a simple structure, and the airtightness of the vehicle body can be maintained reliably.

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional view showing an indoor equipment room portion of an air conditioner equipped with an embodiment of a drain discharge device according to the present invention, FIG. 2 is an enlarged cross-sectional view of the drain discharge mechanism shown in FIG. 1, and FIG. The figure is a plan view of the younger brother 2,'! n4 diagram is f! 43 is a sectional view of section A-A, FIG. 5 is a sectional view of section B-B of FIG.
FIG. 7 is a sectional view taken along line CC in FIG. 6, and FIG. 8 is a sectional view taken along line DD in FIG. 6. Part: Upper lid, 13... Spacer, 14
・・・・・・Lower status, 15 sun 3 same'; t5 flash 6 figure

Claims (1)

[Claims] 1. A drain valve that is installed in a part that collects drain generated from the indoor heat exchanger so that the drain can be discharged, and opens and closes depending on the difference between the drain water head and the outside pressure to discharge the drain, and a drain flow path downstream of the drain valve. The airtight valve is installed in the indoor fan and opens and closes depending on the difference between the suction side pressure of the indoor fan and the outside air pressure, and closes the drain flow path when the outside air pressure is lower than the indoor fan suction side pressure. Drain discharge device for vehicle air conditioners.