Attachment for vehicle air-conditioning apparatus

The invention relates to an attachment for vehicle air-conditioning apparatus used in a vehicle air-conditioning apparatus for taking in external air or internal air through an air-conditioning air intake route, for feeding cleaning, aromatic or other solvent to clean the heat exchanger (evaporator) and improving the compartment environments, in which at least one solvent flow injection means is provided at the upstream side of the heat exchanger in the air-conditioning air intake route, a solvent feed route for feeding first solvent or second solvent to the injection means is provided, and the heat exchanger cleaning effect, or aromatic, deodorizing, disinfecting, or anti-mold effect may be obtained by the first or second solvent injected from the injection means, so that the compartment environments may be substantially improved.

(B) BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to an attachment for vehicle air-conditioning 
apparatus for improving the compartment environments by cleaning a heat 
exchanger (see evaporator) or feeding perfume or other solvent, in a 
vehicle air-conditioning apparatus for taking in external air or internal 
air from an air-conditioning air intake route. 
2. Description of the Prior Art 
The following structure was hitherto known as means for improving the 
compartment environments by cleaning the evaporator, preventing growth of 
mold and bacteria, and suppressing offensive smell. 
That is, in the vehicle air-conditioning apparatus, in which a cooler 
housing is connected to a next stage of an internal and external air 
changing box having a fan incorporated inside, and an evaporator is 
disposed in the cooler housing, a spray port for spraying detergent is 
opened in part of the cooler housing, a spray nozzle of detergent 
container of handy type and spray type is inserted from the spray port, 
the pressing portion of the container is pressed by the finger of the 
operator, and the detergent in the container is sprayed toward the fin. 
This conventional means had the following problems. More specifically, when 
the opening area of the spray port is set wider, the internal and external 
air blow in from the fan escapes outside of the air-conditioning air 
intake route from the spray port of the wide opening area, and hence the 
opening area of the spray nozzle must be narrow, and hence when inserting 
the spray nozzle of the container into the spray port and spraying the 
detergent toward the fin of the evaporator, the spray nozzle cannot be 
inserted deep into the air-conditioning air intake route, and the 
detergent is sprayed only in part of the evaporator, and prevention of 
growth of mold and bacteria, suppression of offensive smell, and 
compartment environments cannot be improved sufficiently. 
(c) SUMMARY OF THE INVENTION 
It is hence a primary object of the invention to present an attachment for 
vehicle air-conditioning apparatus characterized by comprising at least 
one solvent flow injection means at the upstream side of the heat 
exchanger in the air-conditioning air intake route, feeding detergent 
(first solvent), or at least one second solvent of aroma, smell 
suppressing (including deodorizing), bactericidal (including bacteria 
preventive and antibacterial), or anti-mold independent solvent, and 
compound solvent, to the injection means, and thereby securely and 
effectively cleaning the heat exchanger by the cleaning solvent injected 
at least from the solvent flow injection means at the upstream side of the 
heat exchanger, or efficiently deodorizing, bactericidal or anti-mold 
treating the heat exchanger by the second solvent injected from the 
solvent flow injection means, or presenting aromatic effect by releasing 
the aromatic solvent injected from the solvent flow injection means into 
the compartment from the air-conditioning air blowout part of the vehicle 
air-conditioning apparatus. 
It is other object of the invention to present an attachment for vehicle 
air-conditioning apparatus capable of simplifying the route and reducing 
the number of processes of incorporating the route in the vehicle 
air-conditioning apparatus, by sharing the solvent feed route between the 
first solvent and second solvent. 
It is a different object of the invention to present an attachment for 
vehicle air-conditioning apparatus capable of preventing unnecessary 
mixture of solvents, by forming independently the solvent feed routes for 
plural solvent flow injection means (including both plurality in a same 
position and plurality at different positions). 
It is another object of the invention to present an attachment for vehicle 
air-conditioning apparatus capable of feeding the solvent at the 
selectively communicating side securely into the solvent flow injection 
means through a common route in a simple constitution, by selectively 
communicating a common route communicating with the solvent flow injection 
means with each solvent discharge part of first solvent and second 
solvent. 
It is other different object of the invention to present an attachment for 
vehicle air-conditioning apparatus capable of feeding the solvent selected 
by selecting operation by using solvent selecting means securely into the 
solvent flow injection means, without detaching or attaching operation of 
common route in each solvent discharge part, and enhancing the 
controllability, by connecting individual solvent routes to each solvent 
discharge part of first solvent source and second solvent source, 
communicating the individual solvent routes to the common route, and 
disposing using solvent selecting means. 
Further objects of the invention will be more easily understood from the 
following description of embodiments.

(E) DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring now to the drawings, embodiments of the invention are described 
in detail below. 
The drawings illustrate the attachment for vehicle air-conditioning 
apparatus, and referring to individual constitution of the vehicle 
air-conditioning apparatus, first in FIG. 1, an internal and external air 
changeover box 3 (hereinafter called box) having an external air intake 
port 1 and an internal air intake port 2 is provided, and a fan 5 (blowing 
means) driven by a blower motor 4 is disposed in this box 3, and an 
internal and external air changeover door 6 (hereinafter called door) is 
also disposed. 
At a next stage of a blower unit 7, a cooler unit 9 is connected through a 
communication duct 8. The cooler unit 9 has an evaporator 11 (heat 
exchanger) provided inside a cooler housing 16 (hereinafter called 
housing). A drain port 10a is formed in the housing 10 immediately beneath 
the downstream position of the evaporator 11. The evaporator 11 is a heat 
exchanger connected to refrigeration cycle, and acts to deprive the 
surrounding of the heat. 
At a next stage of the cooler unit 9, a heater control unit 12 is 
consecutively connected. This unit 12 possesses a heater core, air mix 
door, vent door, defroster door, heat door, and mixing chamber in its 
inside, and it is constituted so as to blow out the air-conditioned air 
(cold air and hot air) to necessary positions in the compartment from the 
defroster outlet, vent outlet, and heat outlet, by changing over the 
doors. 
In the vehicle air-conditioning apparatus, as an example of intermediate 
part of the box 3 and housing 10, the communicating duct 8 positioned at 
the upstream side of the evaporator 11 is provided with a nozzle 13 of 
relatively tall overall height as solvent flow injection means for 
injecting the first solvent or second solvent toward the entire region of 
the front side of the evaporator 11 by proper means (fitting means, screw 
tightening means, adhesive means). 
In the box 3 outside of changeover locus a of the door 6 at the upstream 
side of the fan 5, a nozzle 14 is fitted as solvent flow injection means 
for injecting the first solvent or second solvent toward the 
air-conditioning air suction position of the fan 5 by proper means 
(fitting means, screw tightening means, adhesive means). 
These nozzles 13, 14 have flange 15 and joint 16 at their base part as 
shown in FIG. 2, and front ends of flexible tubes 18, 19 are fitted to the 
joint 16 through tightening member 17 such as tightening band. The tubes 
18, 19 are connected to a branch pipe 20, and a common tube 21 (common 
route) is fitted to the base end side of the branch pipe 20. 
Meanwhile, the nozzles 13, 14 are formed in a semicircular form at the 
upstream side 22 as shown in FIG. 3, and are composed so as not to add air 
resistance to the wind blown by the fan 5, and the downstream side 23 is 
nearly flat, and at this downstream side 23, as shown in FIG. 2 and FIG. 
3, multiple injection ports 24 . . . are formed so as to be directed to 
the entire front region of the evaporator 11 or the entire suction port of 
the fan 5. 
On the other hand, in FIG. 1, at a position controllable by the driver, in 
a specified area of an instrument panel 25 in the compartment, a single 
case 26 having a partition wall 26a is provided by proper means (mounting 
means by clip, etc.). 
Inside the case 26, as a solvent source having a solvent discharge unit 27 
(hereinafter called discharge unit) and a pressing part 28 in the upper 
part, filling containers 29, 30 of spray type gas cylinder are 
accommodated so as to be exchangeable. The case 26 is formed of synthetic 
resin or the like. 
The case 26 has a lid provided at a proper position, so that the filling 
containers 29, 30 can be exchanged, and the pressing part 28 can be 
operated. 
In this embodiment, one filling container 29 is filled with cleaning 
solvent (first solvent), and other filling container 30 is filled with at 
least one second solvent, selected from the group consisting of aromatic 
solvent (including perfume), deodorizing solvent (including deodorant), 
bactericidal solvent (including bactericide and antibacterial agent), 
anti-old solvent, other independent solvent, and compound solvent, for 
example, aromatic solvent B containing bactericide. These filling 
containers discharge the internal solvents A and B from the solvent 
discharge part 27 (so-called spray nozzle) when the pressing part 28 is 
pressed by sealing with sealing gas. 
At the discharge part 27 in the filling container 29 of the cleaning 
solvent A side, a flexible tube 31 is connected as individual solvent 
route, and at the discharge part 27 in the filling container 30 of the 
aromatic solvent B side, a flexible tube 32 is connected as individual 
solvent route. 
The tubes 31, 32 communicate with the common tube 21 through a convergent 
part 33, and a changeover valve 34 as using solvent selecting means is 
provided in the convergent part 33. Instead of forming the changeover 
valve 34 in the convergent part 33, a valve may be interposed between the 
tubes 31 and 32 to compose the using solvent selecting means. 
As the cleaning solvent A, for example, liquid detergent, foamed detergent 
(blended with a proper amount of water, phosphoric acid, Softanol 70, 
propylene glycol monomethylether MGF, etc.), cleaning water, chemical, 
bactericide, antibacterial, disinfectant or the like may be used either 
alone or in mixture (compound). 
The elements 13 to 34 shown in FIG. 1 may be handled as kit, and may be 
attached later to the vehicle, or assembled preliminarily when 
manufacturing the vehicle. 
In thus constituted attachment for the vehicle air-conditioning apparatus, 
the operation is described below. 
To keep an aromatic effect in the compartment, as shown in FIG. 1, after 
communicating between the port p1 and valve passage 35 by manipulation of 
the changeover valve 34, the pressing part 28 in the filling container 30 
of the aromatic solvent B side is pressed, when the aromatic solvent B is 
supplied into the tubes 18, 19 through the elements 27, 32, 34, 21, and 
sprayed into the air-conditioning air intake route through the nozzles 13, 
14, and therefore the aromatic solvent B is released into the compartment 
through the air-conditioning air blow-out part of the vehicle 
air-conditioning apparatus by the wind blown by the fan 5 driven by the 
blower motor 4, so that an aromatic effect is obtained. 
On the other hand, when cleaning the evaporator 11 and fan 5, after 
communicating between the port p2 and valve passage 35 by manipulation of 
the changeover valve 34, when the pressing part 28 in the filling 
container 29 at the cleaning solvent A side is pressed, the cleaning 
solvent A is supplied into the tubes 18, 19 through the elements 27, 31, 
34, 21, and is sprayed into the air-conditioning air intake route through 
the nozzles 13, 14. 
Since the cleaning solvents A from the nozzles 13, 14 are sprayed from 
multiple injection ports 24 uniformly toward the entire front region of 
the evaporator 11 and entire suction port of the fan 5, and therefore the 
fins of complicated shape of the evaporator 11 and fan blades of 
complicated shape in the fan 5 can be cleaned simultaneously nearly 
completely, and by this cleaning, growth of molds and bacteria can be 
sufficiently prevented, the offensive smell is suppressed securely, and 
the compartment environments can be substantially improved. The liquid 
after cleaning process is discharged from the drain port 10a immediately 
beneath the evaporator 11. If necessary, moreover, a drain hose may be 
connected to the drain port 10a, and the liquid after cleaning process may 
be discharged out of the vehicle. 
Herein, when the fan 5 is driven while injecting the cleaning solvent flow 
from the injection ports 24 of the nozzles 13, 14, the cleaning solvent 
flow after cleaning the fan 5 can be fluidized and sprayed into the 
evaporator 11 side, and this cleaning solvent flow and the cleaning 
solvent flow from the nozzle 13 can reach further inside of the fins of 
complicated shape of the evaporator 11, so that the cleaning effect may be 
further enhanced. 
Thus, by disposing at least one solvent flow injection means (nozzles 13, 
14) at the upstream side of the heat exchanger (evaporator 11) in the 
air-conditioning air intake route (the route from the air intake ports 1, 
2 to the evaporator 11), and supplying the first solvent (cleaning solvent 
A), or at least one second solvent of independent solvents such as aroma, 
deodorant, bactericidal and anti-mold agent or compound solvent, to the 
injection means through solvent feed route (common tube 21), the cleaning 
solvent A injected from the solvent flow injection means (nozzles 13, 14) 
is sprayed to the entire front region of the heat exchanger, thereby 
cleaning the heat exchanger (evaporator 11) securely and effectively, and 
the heat exchanger (evaporator 11) is effectively deodorized, disinfected 
or rid of mold by the second solvent (aromatic solvent B containing 
antibacterial) injected from the solvent flow injection means (nozzles 13, 
14), or the aromatic solvent B injected from the solvent flow injection 
means (nozzles 13, 14) is released into the compartment from the 
air-conditioning air blow-out part of the air-conditioning apparatus, so 
that an aromatic effect may be obtained. 
Besides, the solvent feed route is set in a common route (common tube 21) 
shared between the first solvent A and second solvent (aromatic solvent B 
containing antibacterial), and therefore by simplifying the solvent feed 
route, the number of mounting processes of the vehicle air-conditioning 
apparatus and the cost can be reduced. 
Furthermore, by selecting operation of the individual solvent routes (tubes 
31, 32) or the using solvent selecting means (changeover valve 34) placed 
in the convergent part 33, the selected solvent A or B can be adequately 
supplied into the solvent flow injection means (nozzles 13, 14) through 
the individual solvent routes, convergent part 33, and common route 
(common tube 21), and detaching or attaching operation of the discharge 
parts 27, 27 of the common route is not needed, and the controllability 
may be enhanced. 
In addition, when solvent sources (filling containers 29, 30) are put in an 
exchangeable case 26, and disposed in the compartment, the solvents A, B 
can be supplied into the solvent flow injection means (nozzles 13, 14) by 
manipulation from inside of the compartment. When the solvent A or B is 
used up, it can be replaced with a new solvent source (filling container 
29 or 30), and since the solvent sources are disposed in the compartment 
through the case 26, the layout may be easy. 
In the constitution of forming the nozzle 13 only in one communication duct 
8 to clean the evaporator 11, plural injection ports 24 are formed at both 
the upstream and downstream sides of the nozzle 13, and the evaporator 11 
and fan 5 may be cleaned at the same time, and the nozzle 13 may be bent 
in a "&gt;" form in side view. 
FIG. 4 is a block diagram showing other embodiment, and in this embodiment, 
one nozzle 14 and a discharge part 27 in a filling container 29 of the 
cleaning solvent A side are connected through an independent tube 36, and 
other nozzle 13 and a discharge part 27 in a filling container 30 of the 
aromatic solvent B side are connected through other independent tube 37. 
In this way, when the solvent feed routes (independent tubes 36, 37) to 
plural solvent flow injection means (nozzles 13, 14) are formed 
independently, it is effective to prevent unnecessary blending of solvents 
A, B. Instead of the constitution in FIG. 4, one nozzle 14 and aromatic 
solvent B side may be connected, and the other nozzle 13 may be connected 
with the cleaning solvent A side, or the two nozzles 13, 14 may be 
disposed parallel on a same position of the upstream side of the 
evaporator 11. In this embodiment, too, the actions and effects are nearly 
same as in the embodiment in FIG. 1 in other aspects, and same reference 
numerals are used in the corresponding parts in the previous drawings in 
FIG. 4, and detailed descriptions are omitted. 
FIG. 5 is a block diagram showing a different embodiment, and in this 
embodiment, a total of three filling containers 29, 30, 38 are provided in 
an exchangeable case 26, and a first filling container 29 is filled with 
the cleaning solvent A (first solvent), a second filling container 30 is 
filled with aromatic solvent A containing antibacterial (second solvent), 
and a third filling container 38 is filled with deodorant C (second 
solvent) as one of other second solvents. 
At discharge parts 27 . . . of the filling containers 29, 30, 38, flexible 
tubes 31, 32, 39 are connected as individual solvent routes, and the tubes 
31, 32, 39 are joined at a convergent part 33, and the downstream side of 
the convergent part 33 is connected with a common tube 21, and the 
convergent part 33 also comprises a changeover valve 34 as using solvent 
selecting means. 
In this way, when the valve passage 35 of the changeover valve 34 is 
changed over to communicate with the port a, the cleaning solvent A is 
supplied to the nozzles 13, 14, when communicating with port b, the 
aromatic solvent B is supplied to the nozzles 13, 14, and when 
communicating with port c, the deodorant C is supplied to the nozzles 13, 
14. 
In this constitution, too, the actions and effects are similar to those in 
the embodiment in FIG. 1, and same reference numerals are given to the 
corresponding parts in the previous drawings in FIG. 5 and detailed 
descriptions are omitted. Incidentally, the combination of the first 
solvent and second solvent is not limited to the illustrated example 
alone. 
FIG. 6 shows a further different embodiment, and this embodiment is applied 
to the vehicle air-conditioning apparatus of the type of disposing the fan 
5 at the downstream side of the evaporator 11. 
In this case, on the surface confronting the evaporator 11 in an outer 
frame 40 mounted on the outer surface of an air intake port (internal air 
intake port 2) of the side confronting the front surface of the evaporator 
11, a nozzle 41 of a relatively long round pipe or square pipe is 
installed by making use of the overall length of the internal air intake 
port 2, and multiple injection ports 24 (see previous drawing) directing 
toward the entire front region of the evaporator 11 are formed on the 
surface of the nozzle 41 confronting the evaporator 11. The nozzle 41 may 
be combined in a cross form or the like. 
Moreover, the front end of the nozzle 41 is connected with a flexible tube 
42, and the base end side of the tube 42 is guided into the compartment, 
and the base end opening of the tube 42 is closed detachably by a cap 
member 43, and the base end side of the tube 42 is stopped in a instrument 
panel 25 near the case 26 by using a clip member 44, and the tube 42 is 
detached from the clip member 44 when necessary. 
In FIG. 6, reference numeral 45 is an air mix door, 46 is a heater core, 47 
is a differential, heater and cooler changeover door, 45 is a heater and 
cooler changeover door, 49 is a heater blow-out port, 50 is a cooler 
blow-out port, and a 51 is a differential blow-out port. 
In this way, when cleaning the evaporator 11, the tube 42 is detached from 
the clip member 44, the cap member 43 is removed, the tube 42 is fitted to 
the discharge part 27 in the filling container 29 of the cleaning solvent 
A side indicated by virtual line x in FIG. 6, and when the pressing part 
28 is manipulated from inside of the compartment, the door 6 is changed 
over to the shown state, and the cleaning solvent A is supplied to the 
nozzle 41, and the entire front region of the evaporator 11 can be cleaned 
uniformly by the cleaning solvent A sprayed from the nozzle 41. 
On the other hand, to keep aromatic effect in the compartment, the tube 42 
opened at the base end as indicated by virtual line y in FIG. 6 is fitted 
to the discharge part 27 in the filling container 30 at the aromatic 
solvent B side, and when the pressing part 28 is manipulated from inside 
of the compartment, the aromatic solvent B is supplied into the nozzle 41, 
so that the aromatic solvent B is released into the compartment from the 
air-conditioning air blow-out part by rotation of the fan 5, so that an 
aromatic effect may be obtained. 
In this way, by selectively communicating between the common route (tube 
42) which communicates with the solvent flow injection means (nozzle 41), 
and the discharge parts 27, 27 of the first solvent source (filling 
container 29) and second solvent source (filling container 30), the 
selected solvent A or B can be securely supplied into the solvent flow 
injection means (nozzle 41) through the common route (tube 42) in a simple 
structure. In the structure in FIG. 6, three or more filling containers 
may be exchangeably accommodated in the case 26. 
In other points, the actions and effects are nearly same as in the 
preceding embodiments, and same reference numerals are given to the 
corresponding parts in the preceding drawings in FIG. 6, and detailed 
descriptions are omitted.