JPH0349048Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to automobile air conditioners and air cleaners, and more specifically, to the dew condensation water generated from the heat exchanger that adjusts the temperature and humidity of the air inside the automobile. This invention relates to an air conditioner/air cleaner for automobiles, which aims to purify the air inside the car and improve livability by preventing the adverse effects of air pollution.

[Prior Art] Generally, in order to improve the comfort inside a car, an air conditioner/air cleaner for a car is used, which is a combination of a cleaner, a heater, a cooler, and the like. In this case, the cleaner can be classified into a dry type, that is, a filter paper type, and a wet type, that is, an oil bath type, and the former is mainly widely used.

However, in conventional air conditioners, the air temperature/humidity control part and the air purification part are separate parts, so the entire device becomes large, and when installed in a car, it makes the narrow interior of a car even smaller and costs are reduced. However, there are problems such as being expensive. In addition, when a filter paper type cleaner is used, there is the hassle of having to replace the filter paper that has dust on it, and the pressure loss increases, which reduces the power consumption of the fan drive motor. There is also the problem of getting bigger. In order to solve this problem, the 12th
As shown in the figure, the upstream or downstream side (the upstream side is shown in the figure) of the heat exchanger b disposed in the air flow path a that communicates the interior of the vehicle or the outside of the vehicle with the interior of the vehicle.
It is conceivable to incorporate an air cleaner c using corona discharge into the air cleaner. In this case, air cleaner c
are wire-shaped discharge electrodes d, d, ... and discharge return electrode plate e,
e,..., so there is a problem with heat exchanger b due to the scattering of condensed water from heat exchanger b, i.e., a decrease in dust collection efficiency due to adhesion to the electrodes, or a short circuit between the electrodes. Because of the danger, conventionally a plastic net f is provided between the heat exchanger b and the air cleaner c. In addition, in FIG. 12, the symbol g is a battery, and the symbol h is a ground.

[Problems to be solved by the invention] However, by providing the net body f,
Since the air flow path a is blocked, there is a risk of pressure loss resulting in a decrease in dust collection performance and cooling capacity, and it is not possible to reliably prevent the splashing of condensed water from the heat exchanger b. There is also a risk that condensed water will accumulate on the bottom of the air flow path a, and that this condensed water will cause a shoot.

[Means for solving the problem] This idea was created in view of the above circumstances, and in order to solve the above technical problem, it is necessary to reduce the adhesion of condensed water generated from the heat exchanger to the corona discharge part as much as possible. It is an object of the present invention to provide an air conditioner/air cleaner for an automobile, which is characterized in that it is possible to reduce the amount of condensed water and to prevent short circuits between electrodes due to condensed water.

That is, in this invention, a heat exchanger is disposed in the interior of the vehicle or in an air flow path communicating between the outside and the interior of the vehicle, and on the upstream or downstream side of this heat exchanger,
In an automobile air conditioner/air cleaner comprising a corona discharge section composed of a discharge electrode and a discharge counter electrode, and a dust collection section having a dust collection electrode, the corona discharge section is arranged in a plurality of vertically arranged corona discharge sections. It is formed by a discharge electrode and a discharge counter electrode, and the discharge electrode and discharge counter electrode are held by an insulating frame, and dew condensation is formed in the drain hole provided at the bottom of the air flow path on the lower side of the discharge counter electrode. It is an object of the present invention to provide an air conditioner/air cleaner for an automobile, which is characterized by forming a gap for guiding water.

In this invention, the corona discharge section may have any form as long as it is composed of a plurality of vertically arranged discharge electrodes and a discharge counter electrode, but preferably has a plurality of tipped points. It is composed of a discharge electrode plate having a shaped discharge needle, and a discharge return electrode plate having a plurality of through holes located at the tips of the pointed discharge needles, or a plurality of wire-shaped discharge electrodes,
It is better to configure it with a discharge return electrode. Further, the corona discharge section and the dust collection section may be formed separately,
It is also possible to form them in one piece. In this case, if formed separately, it is preferable to form the dust collecting part with a plurality of dust collecting electrode plates arranged vertically at appropriate intervals, or if formed integrally For example, a discharge part is constituted by a discharge electrode plate having a plurality of pointed discharge needles and a discharge return electrode plate having a plurality of square-shaped through holes respectively located at the tips of the pointed discharge needles. Preferably, the dust collection pole pieces are bent from one common side of the rectangular through holes in a direction perpendicular to the discharge return electrode plate on the same plane.

[Effect] The above technical means works as follows.

Dust in the air supplied from inside or outside the car is charged by the corona discharge that occurs between the discharge electrode and the discharge counter electrode, and when it passes through the downstream heat exchanger, it is charged by the potential difference with the discharge part. Therefore, dust is collected on the surface of the dust collecting section, and only clean air is cooled or heated and supplied into the interior of the vehicle. At this time, condensed water is generated from the heat exchanger, and the droplets of this condensed water scatter to the discharge part and adhere to the discharge electrode and discharge counter electrode, etc. However, since these discharge electrodes are arranged vertically, The condensed water droplets fall to the bottom of the insulating frame. Then, the condensed water is guided to the drain hole through a gap formed between the lower side of the discharge counter electrode and the lower part of the insulating frame, and is discharged to the outside.

[Example] An example of this invention will be described below based on the drawings.

◎ First Embodiment Figure 1 is a sectional view showing the structure of an automobile air conditioner equipped with an air cleaner according to the first embodiment of this invention. FIG. 3 is a schematic perspective view of an air cleaner according to an embodiment, and FIG. 3 is a sectional view of the main part of FIG. 2.

The air conditioner/air cleaner of this invention selectively connects the passenger compartment 1 of an automobile with the intake door 12.
The circulation fan 50, the heat exchanger 30, and the air cleaner section 20 are arranged in this order from the upstream side to the downstream side of the air passage 10 that communicates the outside 13 and the inside 11 of the vehicle. In this case, a heater core 15 is disposed downstream of the air cleaner section 20 via an air mix door 14, and a ventilator (not shown) is disposed downstream of a branch path 19 parallel to the heater core 15 via a vent door 16. is arranged, and the downstream side of the heater core 15 is communicated with the floor side or the differential side via a floor door 17 or a differential door 18, respectively.

The air cleaner section 20 includes a corona discharge section 22 (hereinafter referred to as a discharge section) and a dust collection section 21, which are arranged from the upstream side to the downstream side.
As shown in FIG. 2, the discharge section 22 has a plurality of pointed discharge needles 24, 24... projecting toward the upstream side, and a plurality of needles vertically arranged at appropriate intervals. It is composed of discharge electrode plates 26, 26... and a discharge return electrode plate 28 having a plurality of circular through holes 27, 27... in which the tip of each discharge needle 24 is located at the center. A plurality of dust collecting electrode plates 23, 23... arranged vertically at intervals.
Alternatively, it is composed of a plurality of dust collecting electrode plates 23, 23... and dust collecting counter electrode plates 25, 25... opposed between these dust collecting electrode plates 23, 23,... (second
(see figure). In this case, the discharge electrode plates 26, 26, .
As shown in FIG. The air flow path 10 is installed between the lower side of the discharge return electrode plate 28 and the lower end of the frame 40.
A gap 42 is formed to guide condensed water to a drain hole 60 provided at the bottom of the drain hole 60 (see FIG. 1).
In this case, the discharge electrode plate 26 is made of a strong conductive metal plate such as stainless steel, ordinary steel, copper, brass, or aluminum, with a thickness of 0.1 to 3.0 mm, preferably 0.2 to 1.0 mm. The discharge return electrode plate 28 is formed of a conductive metal plate such as an aluminum alloy. Further, the dust collection electrode plate 23 and the dust collection counter electrode plate 25 are formed of a conductive metal plate similar to the discharge electrode plate 26 and the discharge return electrode plate 28, or cardboard whose surface is coated with metal or carbon.

In the air cleaner section 20 configured as described above, the discharge electrode plates 26, 26... are connected to the cathode of the battery B, the discharge counter electrode 28, the dust collecting electrode plate 23,
23... are connected to the anode of the battery B, and when a voltage is applied between these discharge electrode plates 26, 26... and the discharge counter electrode plate 28, a corona discharge is generated between them. In this case, the discharge electrode plates 26, 26, . . . and the discharge counter electrode plate 28 may have opposite polarities to perform anodic discharge. Such a corona discharge can be generated by, for example, 3.5 to 5 KV, which can be obtained by transforming and rectifying an automobile battery B.
It can be done with a direct current of 0.01-1mA.

The air conditioner of this invention configured as above.
In the air cleaner, the intake door 12 is switched to either the inside of the vehicle or the outside of the vehicle,
When the fan 50 is driven by the motor 52 and electricity is applied to the discharge electrode plates 26, 26, . . . , the discharge return electrode 28, the dust collection electrode plates 23, 23, . The air is cooled by a container 30 (which in this case functions as an evaporator) and flows to the air cleaner section 20 . Then, after the dust in the air is charged positively or negatively by corona discharge by the discharge electrode plate 26 and the discharge counter electrode plate 28, it is collected by the dust collection electrode plate 23, and only the purified air is cooled. It is supplied to the vehicle interior 11 for cooling in this state. Also, during heating,
When passing through the heater core 15, it is heated and supplied to the vehicle interior 11 for heating purposes. Incidentally, droplets of condensed water generated from the heat exchanger 30 are scattered to the air cleaner section 20 due to the vibration during operation, but since the discharge electrode plate 26 and the discharge return electrode plate 28 are arranged vertically, The condensed water adhering to the discharge electrode plate 26 and the discharge return electrode plate 28 quickly falls off due to its own weight and the vibration of the vehicle, improving dust collection performance. In addition, the fallen condensed water flows into the drain hole 60 through the gap 42 and is discharged to the outside.
Short circuits between electrodes are prevented.

In the above embodiment, a case has been described in which the air cleaner section 20 of this invention is disposed on the downstream side of the heat exchanger 30, but the structure is not necessarily limited to this, and the air cleaner section 20 of the present invention is disposed on the upstream side of the heat exchanger 30. The same applies even if the air cleaner section 20 is provided.

◎Second Embodiment Figures 4 and 5 are a schematic perspective view and a sectional view of a main part of a second embodiment of the air cleaner of this invention, in which the discharge electrode is formed of a wire discharge electrode. That is, the discharge section is constituted by a plurality of wire-shaped discharge electrodes 26a, 26a, . . . arranged vertically, and discharge counter electrode plates 28a, 28a, . . . This is a case where it is attached to the insulating frame 40 by extending from the plates 28a, 28a, . . . . In this case, the lower frame portion 44 of the insulating frame 40 is connected to the wire-shaped discharge electrode 2.
A gap 42 for receiving condensation water is formed between the upper chord member 46 and the lower chord member 48. Discharge return electrode plates 28a, 28
a, . . . , and the lower end portions of the wire-shaped discharge electrodes 26 a, 26 a, . Therefore, the wire-shaped discharge electrode 26
The condensed water adhering to a, 26a, ... falls into the gap 42 through the through hole 43 at the bottom due to its own weight and vibration of the car, and is discharged to the outside from the drain hole 60 through the gap 42. , short circuits between the electrodes are prevented. In this case, the through hole 43 of the upper chord member 46
may be a notched groove (not shown) cut out from the upper or downstream side. Furthermore, the upper surface of the upper chord member 46 is
In order to facilitate the flow of condensed water flowing down from the discharge return electrode plate 28a, it is desirable to provide a water gradient in either the upstream or downstream direction.

The other parts of the second embodiment are the same as those of the first embodiment, so the same parts are given the same reference numerals and the explanation thereof will be omitted.

◎ Third Embodiment Figures 6 to 8 respectively show a perspective view of an air cleaner according to a third embodiment of this invention, a perspective view of its essential parts, and a perspective view of its operating state, showing the discharge section and dust collection section. This is the case when it is made common. That is, the discharge section 22 is composed of discharge electrode plates 26, 26, . 29, 29..., and a perpendicular shape that is bent in a direction orthogonal to the discharge return electrode plate 28b on the same plane from one side common to the rectangular through holes 29, 29... Dust collection pole piece 23
a, 23a..., and one end surface of the insulating frame 40 formed in a rectangular shape (the air flow path 10
This is a case where the discharge counter electrode plate 28b is fixed to form a gap 42 in the insulating frame 40, and the discharge electrode plates 26, 26, . . . are disposed within the insulating frame 40. Therefore, the air cleaner section can be made thinner, and space can be used more effectively. Also,
When the air heat-exchanged in the heat exchanger 30 is sent to the air cleaner section 20, corona discharge occurs between the pointed discharge needle 24 of the discharge electrode plate 26 and the square-shaped through hole 29 of the discharge return electrode plate 28b. After the dust in the air is charged, it is collected by the dust collection pole piece 23a.

Note that in the above embodiment, the heat exchanger 30 is
As shown in the figure, a heat exchange tube 32 into which the refrigerant flows is bent in a meandering manner in the vertical direction, and the heat exchange tube 3
A so-called serpentine type heat exchanger is used, which is composed of wavy heat exchange fins 34 interposed in the gap between two adjacent parts, but it does not necessarily have to be the serpentine type described above. It may be a type heat exchanger or a fin-tube type heat exchanger. In this case, it is desirable to install any heat exchanger in a position that allows for good drainage.

In the above embodiment, a case has been described in which the air cleaner section 20 is composed of the discharge section 22 and the dust collection section 21, and the air cleaner section 20 is arranged downstream of the heat exchanger 30, but this is not necessarily the case. The structure is not limited, but for example, the discharge section 22 may be disposed upstream of the heat exchanger 30,
A heat exchanger 30 may be connected to the same pole as the discharge return electrode plate 28 of the discharge section 20 or to the ground side to constitute the air cleaner section 20 as a dust collection section.

The air conditioner of this invention configured as above.
The air cleaner 1 can be used as a replacement for existing automobile air conditioners. For example, as shown in FIG.
As shown in Fig. 10, there is a trunk type that is installed in the trunk 4 of the automobile 2 and supplies clean air for cooling or heating into the passenger compartment 11 from the rear, or a dual type that uses a combination of the above two. (see figure) can be used for either type. Furthermore, the air conditioner/air cleaner of this invention can be applied not only to automobiles other than ordinary passenger cars, such as large automobiles such as buses, but also to air conditioners of railway vehicles and the like.

[Effects of the invention] As explained above, the air conditioner and
According to the air cleaner, a corona discharge section is formed by a plurality of discharge electrodes and a discharge counter electrode arranged vertically,
These discharge electrodes and discharge counter electrodes are held by an insulating frame, and a gap is formed on the lower side of the discharge counter electrode to guide condensed water to the drain hole provided at the bottom of the air flow path. The following effects can be obtained.

1. Since all the electrodes of the discharge electrode and the dust collection electrode are arranged vertically, even if the dew water generated from the heat exchanger adheres, the water can be drained well, and the dust collection performance can be improved.

2. The condensed water that adheres to the vehicle due to the vibrations of the car is discharged to the outside from the drain hole through the gap at the bottom, so that the condensed water can be drained smoothly, and the condensed water can be discharged easily between the electrodes with different poles. Short circuits can be prevented and the safety of the device can be ensured.

3. Since the pressure loss is lower than that of fiber filters used in conventional air conditioners and air cleaners, the power consumption of the fan drive motor is reduced, resulting in energy savings.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the structure of an automobile air conditioner/air cleaner equipped with the air cleaner of the first embodiment of this invention, Fig. 2 is a schematic perspective view of the air cleaner of the first embodiment, and Fig. 3 is the second embodiment. 4 is a schematic perspective view of the main part of the second embodiment of this invention, FIG. 5 is a sectional view of the main part of FIG. 4, and FIG. 6 is a third embodiment of this invention. 7 is a perspective view of the discharge counter electrode and dust collection electrode in the third embodiment, FIG. 8 is a perspective view showing the arrangement of the third embodiment, and FIGS. 9 to 11 are FIG. 12 is a schematic sectional view showing another mode of use of the invented air conditioner/air cleaner, and FIG. 12 is a sectional view of a main part of a conventional air conditioner/air cleaner. Explanation of symbols, 10... Air flow path, 11... Vehicle interior, 13... Vehicle exterior, 20... Air cleaner section,
21... Dust collecting section, 22... Discharging section, 23... Dust collecting electrode plate, 23a... Dust collecting pole piece, 24... Pointed discharge needle, 25... Dust collecting counter electrode plate, 26... Discharging Electrode plate, 2
6a...Wire-shaped discharge electrode, 27...Through hole, 28,
28a, 28b...discharge return electrode plate, 29...square through hole, 30...heat exchanger, 40...insulating frame,
42...Gap, 60...Drain hole.

Claims (1)

[Scope of Utility Model Registration Claim] (1) A heat exchanger is disposed in the interior of the vehicle or in an air flow path communicating between the exterior and the interior of the vehicle, and on the upstream or downstream side of this heat exchanger, An automobile air conditioner comprising a corona discharge section consisting of a discharge electrode and a discharge counter electrode, and a dust collection section having a dust collection electrode.
In the air cleaner, the corona discharge section is formed by a plurality of discharge electrodes and a discharge counter electrode arranged vertically, and the discharge electrodes and the discharge counter electrode are held by an insulating frame, and the lower side of the discharge counter electrode is An air conditioner/air cleaner for an automobile, characterized in that a gap is formed to guide condensed water to a drain hole provided at the bottom of the air flow path. (2) The corona discharge section is composed of a discharge electrode plate having a plurality of pointed discharge needles, and a discharge return electrode plate having a plurality of through holes respectively located at the tips of the pointed discharge needles. An automobile air conditioner/air cleaner according to claim 1 of the utility model registration claim. (3) The corona discharge section includes a plurality of wire-shaped discharge electrodes,
An air conditioner/air cleaner for an automobile as set forth in claim 1 of the utility model registration claim, which comprises a discharge return electrode plate. (4) The corona discharge section is composed of a discharge electrode plate having a plurality of pointed discharge needles, and a discharge return electrode plate having a plurality of square-shaped through holes respectively located at the tips of the pointed discharge needles. and a dust collection pole piece is formed from one common side of the through hole in a direction perpendicular to the discharge return electrode in the same plane. Air conditioner/air cleaner. (5) The automotive air conditioner according to claim 1, in which the dust collecting section is composed of a plurality of dust collecting electrode plates arranged vertically at appropriate intervals.
Air cleaner.