EP0888977B1 - Spraying device - Google Patents

Abstract

The equipment comprises a vessel with outlet nozzle and containing a partly-liquefied gas mixture under pressure. A cap (5) on the nozzle has an outlet port (9) through which the nozzle discharges. The cap and mixture can also be used for drain-cleaning and local refrigeration if desired, and for blowing passages clear. The cap can be so shaped as to fit against an opening, particularly the drain from a wash basin and along an annular surface, so that no gas can escape sideways.

Description

The invention relates to a spray device according to the preamble of the claim 1.

Spray devices are known as either gas pressure drain cleaners, as medical icing devices, as blow-out cleaners, as cooling sprays to find thermal errors or as fire extinguishers. The structural design the known spray devices, in particular the structure of their cap or their operating mechanism, as well as the composition of their gas mixture and the pressure under which the gas mixture is under special Use case chosen accordingly. Thus, the known spray devices to fulfill their special purpose. However prevented their design fulfilling different, possibly also application-like tasks with a single sprayer.

From FR 2405875 A a spray device for drain cleaning is known. This has a cap that is attached to a drain opening. By Pressure actuation of the spray device can cause a spray through the cap flow into the drain.

A cold spray is known from US Pat. No. 5,477,993 A.

An object of the invention is to provide a spray device those for several different uses, especially for different ones Cleaning tasks that can be used.

According to the invention, this object is achieved by the features of claim 1.

The spray device according to the invention is therefore of several applications at the same time structurally adapted: the structure of their cap, its actuating mechanism and the pressure under which the gas mixture is located are chosen so that with the help of the spray device according to the invention blockages and Contaminants in drain pipes can be removed. The same spray device is also designed in such a way that they deliver spray agents in a targeted manner and thus can produce local cooling. This mode of action can also increase Serve cleaning purposes, for example by adding an adhesive substance, in particular Chewing gum, cooled or iced, so that the substance of one Item, such as clothing textile or carpet, to which it adheres, can be removed in a tough or icy condition.

The local cooling that can be achieved by the spray device according to the invention However, it can also be used, for example, to generate icing, in particular for medical purposes. The local cooling effect can also used to find thermal faults, especially in electrical devices. The spray device is suitable for all of the aforementioned applications their design according to the invention can be used equally. The usage the spray device according to the invention is nowhere near limited to a single special application.

The spray device according to the invention is actuated by its outlet nozzle is moved in the direction of the container. To the sprayer for Zwekke to use the drain cleaning, that of the outlet nozzle Cap attached to the opening of the drain, and the container of the sprayer is operated in the direction of the cap or the drain. Because of the Pressure of the spraying agent flowing from the container into the drain contaminants and blockages in the drain are loosened. The usage for the purpose of local cooling is done by actuating the spray device while she is upside down. If namely after the outlet nozzle points below, the liquid part of the spray can escape from the container and evaporate.

Since the cap and the gas mixture are such that the spray device can also be used optionally for blow-out cleaning, is the invention Spray device advantageously for an even larger one Number of different types of cleaning applicable. It therefore makes it possible in addition, electronic, electrical or mechanical devices, in particular Office machines, keyboards, circuit boards and watch cases, from dirt or to clean dust by blowing it out with the gas mixture. The outlet nozzle the spraying device must point upwards so that the lighter, gaseous part of the spray flows out of the container. The invention Spray device advantageously leaves no liquid, solid or film-like residues.

It is advantageous that the cap of the spraying device according to the invention is designed in this way is designed that its side having the outflow opening on one Opening of a drain is attachable, so that the escape from the outflow opening flowing spray in directions other than that of the drain is disabled. This can cause contact between the cap and the drain take place along an annular surface which is the outflow opening or the opening of the drain surrounds. This will inadvertently escape the Spray from the spray device on the side of the opening of the drain prevented by.

The drain may be a sink or is a flushing water drain from a urinal or flushing toilet. In the latter case, it is advantageous to use the cap as a triangular cap or as Form a round cap so that the opening of the drain along a triangular or an essentially round ring surface opposite lateral Flowing past the spray is sealed and the spray essentially flows in the direction of the drain.

The cap can be made as a molded part. It is also a hollow cylinder formed, the one end of the hollow cylinder facing the container is open so that the cap partially surrounds the container. The other Front can be convexly curved outwards and in the center towards the Container set back. The outflow opening of the cap is located in this case in the middle of the recessed area, and protrudes from it in the direction of the container a pipe neck away, which is the outlet nozzle of the Around the container or locked in place with the outlet nozzle.

The outflow of the spray medium from the container of the spray device can by actuating the outlet nozzle or the cap in the direction of the container be prompted. If the cap is attached to a drain opening, the spray device can be actuated in that the container in Direction of the cap attached to the drain opening is moved.

The cap can be locked with the container or the outlet nozzle of the container be removable from it. It is contemplated that the spray device with the cap removed in the area of the outlet nozzle with a Spray head can be provided. This spray head has an outlet opening, through the flow from the outlet nozzle of the container into the spray head Spray can escape. It is further preferred if the Spray head causes a deflection of the spray.

This spray head can be used for the targeted delivery of the spray agent during production local cooling or blow-out cleaning. To this Purpose, it can be particularly advantageous if an elongated, hollow cylindrical Tube attachment can be plugged onto the outlet opening of the spray head. It is preferred if the cap has a snap holder in which the Tube attachment of the spray head and / or the spray head itself can be attached.

The spray head is preferably with the container or the outlet nozzle of the container lockable. The outflow of spray from the container through the outlet nozzle and the spray head by pressing the spray head in the direction of the container, especially with a finger become.

As an alternative to attaching a spray head to the container of the spray device can also be the outflow opening of the cap tubular or tubular be formed or with a spray hose or a hollow cylindrical Spray tube can be seen. This configuration can also targeted delivery of the gaseous or liquid spray is made possible, especially when using the spray device for local cooling or for blow-out cleaning. In this case, it is not necessary Cap removable from the container and a spray head or one to attach a spray head having a tube attachment to the container.

The spray hose attached directly to the outflow opening of the cap or spray tube can in particular deflect the spray cause. The spray hose or the spray tube can also in the Snap holder of the cap can be attached.

It is advantageous if the cap or the triangular cap or the round cap so flexible in the area of the end face which has the outflow opening is that the shape of this end face when attached to an opening of a Drain adapts to the shape of this opening. Thus the escape of Spray that flows out of the outflow opening of the cap, through the side Gap between cap and side edge of the drain additionally obstructed and the pressure with which cleaning is carried out increases.

The cap or the triangular cap or the round cap can be used for the same purpose a sealing element on the end face having the outflow opening have. This sealing element can be used, for example, as an annular rubber seal be trained.

The container of the spray device according to the invention is particularly easy to handle if it is cylindrical. For example, it can be used as a metal can be trained. This metal can can on its outer surface to the front towards the center of which the outflow opening is arranged, taper towards.

It is advantageous if the pressure at which the spray is within the Container stands, is a multiple of the atmospheric pressure. In preferred Embodiment, this pressure when filling the container in about 8 bar.

The gas mixture of the spray device according to the invention can, for example to a proportion between 75% and 95%, preferably to 85%, a propellant, for example F134a included. Another component can be in the gas mixture Dimethyl ether be included in a proportion between 5% and 10%. The gas mixture may contain other proportions of suitable gases.

The invention relates not only to the aforementioned structural embodiments a spray device, but also on the use of a spray device of the type mentioned in claim 1 optionally for drain cleaning and for local refrigeration or optionally for drain cleaning, for local Cooling and blow cleaning. The invention further relates on the use of such spray devices for cooling or freezing substances adhering to clothing and / or mobile textiles, in particular of chewing gum to these substances in cooled or iced To be able to remove the condition from the textile and the use of such Spray devices for blow cleaning fluid lines, such as of fuel lines in motor vehicles.

Further preferred embodiments of the invention are in the subclaims described.

Figur 1

eine vergrößerte Seitenansicht eines Behältnisses einer erfindungsgemäßen Sprühvorrichtung,

Figuren 2A und 2B

eine zur Hälfte aufgebrochene Seitenansicht bzw. eine Draufsicht einer Kappe einer erfindungsgemäßen Sprühvorrichtung, und

Figuren 3A und 3B

eine vergrößerte, teilweise aufgebrochene Seitenansicht bzw. zur Hälfte aufgebrochene Draufsicht eines Sprühkopfes mit aufgestecktem Röhrenaufsatz.

The invention is described below using exemplary embodiments with reference to the drawings; in these show:

Figure 1

2 shows an enlarged side view of a container of a spray device according to the invention,

Figures 2A and 2B

a half broken side view and a plan view of a cap of a spray device according to the invention, and

Figures 3A and 3B

an enlarged, partially broken side view or half broken plan view of a spray head with attached tube attachment.

Figure 1 shows an enlarged side view of a container 1 of an inventive Spraying device. The container 1 is a cylindrical metal can educated. The container 1 tapers towards the upper end face, and it is there provided with a metal lid 2, which encompasses an outer, the container 1 round brim and an inner one encompassing a central opening has a round brim. The metal lid is between the two brims 2 a not shown in Figure 1, offset in the direction of the container 1 annular recess 3.

Inside the central opening of the metal cover 2 there is a hollow cylindrical one Outlet nozzle 4, which partially protrudes into the container 1 and partially protrudes from this. The outlet nozzle 4, the metal cover 2 and that Container 1 are arranged on a common longitudinal axis.

The upper end of the wall of the outlet nozzle protruding from the container 1 4 is gradually enlarged radially outward to form an annular flange 4a, which tapers conically towards the upper opening of the outlet nozzle.

Inside the container 1 is under a pressure of about 8 bar a partially liquefied gas mixture as a spray. By pressing the Outlet nozzle 4 flows in the direction of the container 1 due to a known, Valve mechanism 'not shown in detail in FIG. 1 the container 1 through the outlet nozzle 4. If the outlet nozzle 4, such shown in Figure 1, facing upward, lighter, gaseous spray flows from the container 1. If, on the other hand, the outlet nozzle 4 points downwards, can Flow heavier, liquid spray from container 1 and evaporate.

FIG. 2A shows a side view of a cap 5 of a half broken open Spray device according to the invention. The hatched parts have a structure which is rotationally symmetrical about the longitudinal axis of the cap 5. In Figure 2B, the cap 5 is shown in plan view.

The cap 5 has a hollow cylindrical base body 6. The hollow cylinder 6 is open on its lower face and on the upper face 7 it is convex closed in the direction of the longitudinal axis of the cap 5. In one central, about a third of the diameter of the hollow cylinder 6 occupying Area 8, the upper end face 7 is set back in the direction of the lower end face. The set-back area 8 also has one around the longitudinal axis the cap 5 rotationally symmetrical structure. In the middle, the setback points Area 8 has an outflow opening 9, the diameter of which Inner diameter of the hollow cylindrical outlet nozzle 4 of the one shown in FIG Container 1 corresponds.

A hollow cylindrical tube extension also projects from the recessed area 8 10 a short distance towards the lower end of the cap 5. The The outer diameter of the tube extension 10 is approximately half that Diameter of the recessed area 8, and its inner diameter corresponds essentially to the outer diameter of the wall of the outlet nozzle 4. Thus, the outflow opening 9 forms one opposite the pipe extension 10 inward ring heel 9a.

On the lower, open end face of the tube extension 10, the wall thereof is for Flattened on the inside inclined upwards. Between the outflow opening 9 and the lower end face of the tube extension 10 on its inside perpendicular to the longitudinal axis of the cap 5, annular projection 10a for engaging the ring flange 4a of the outlet nozzle 4.

In addition, there is a tubular sealing cylinder on the recessed area 8 11 integrally formed, the diameter of that of the recessed area 8th corresponds. The sealing cylinder 11 projects in the direction of the lower end face the tube extension 10 and it is open at the bottom.

The cap 5 also has six equally spaced inside spaced longitudinal ribs directed radially in the direction of the longitudinal axis of the cap 5 12 on. The longitudinal ribs 12 run from the approach of the set back Area 8 on the upper end face 7 along the hollow cylinder 6 on the inside thereof to the lower end of the cap 5.

Finally, the cap 5 has one on the outside of the hollow cylinder 6, in Height and arranged parallel to the lower end face of the cap 5 Snap holder 13. This consists of two tongues that are side by side are arranged so that the space is essentially a round opening forms.

The cap 5 shown in FIGS. 2A and 2B is on the one shown in FIG Container 1 attachable. For this, the lower, open face of the Cap 5 placed on the upper end of the container 1 until the pipe neck 10 encompasses the outlet nozzle 4 and the outlet nozzle 4 at that of the outflow opening 9 of the recessed area 8 formed ring shoulder 9a.

The insertion of the outlet nozzle 4 in the tube extension 10 is due to the inclined Design of the wall of the tube extension 10 facilitated. Also lie the longitudinal ribs 12 of the cap 5 substantially on the outer surface of the Container 1, and thus center the cap 5 with the pipe socket 10 and the sealing cylinder 11 and the container 1 on a common longitudinal axis.

Because of the ring flange formed at the upper end of the outlet nozzle 4 4a and the corresponding, formed on the inside of the tube extension 10 The ring cap 10 a can be placed on the container 1 cap 5 engage detachably with container 1.

The convex curvature of the upper end face 7 of the cap 5 enables use the spray device according to the invention for drain cleaning. For this, the spray device is turned upside down, and the front side 7 is placed centrally at a round drain opening. If now the container 1 is moved in the direction of the drain opening, this corresponds to an actuation the outlet nozzle seated on the ring shoulder 9a of the outflow opening 9 4 relative to the container 1. As a result, spray flows straight out of the Container 1 through the outlet nozzle 4 of the container 1 and the outflow opening 9 of the cap 5 in the opening of the drain. So that towards or Spraying agents flowing along the drain can contaminate the drain detach and carry away so that the drain due to the pressure effect of the spray is cleaned.

To carry out such a drain cleaning, it makes sense to use the area about 5 cm above the drain opening with water fill so that the annular gap between the drain and the end face 7 of the cap 5 is surrounded by the water along the circumference of the cap 5. This will when actuating the spray device attached to the drain opening, an unwanted lateral flow of the spray through the annular gap hindered.

The area 8 set back within the end face 7 increases the possible range Flow cross section of the flowing from the outlet nozzle 4 into the drain Spray. For example, if the drain opens from a Protective grille partially covered, especially in the central area of the opening is due to this concealment, a linear flow of the spray be hindered from the cap 5 in the drain. In this case it can Spray agent due to the increased flow clearance in the recessed area 8 but also laterally past the cover in the drain stream.

The end face 7 is convex around the set-back area 8 arched that they have drains of different diameters to which they are attached is, can seal: The lateral flow of spray through one Gap between the end face 7 and the opening of a drain essentially becomes prevented.

The sealing cylinder 11 arranged on the recessed area 8 of the cap 5 prevents spray from flowing out of the outlet nozzle 4 through the Pipe attachment 10 and the open end face of the cap facing the container 1 5. For this, the sealing cylinder 11 engages in the recess 3 between the inner and the outer brim of the metal lid 2 of the container 1.

The actuation of the spray device attached to a drain opening is described in Stabilized in the longitudinal direction in that the longitudinal ribs 12 of the cap 5 laterally rest on the outer surface of the container 1 and the cap 5 in the longitudinal direction to lead.

Figure 3A shows an enlarged, partially broken side view of a Spray head 14 of a spray device according to the invention. Figure 3B shows the same spray head 14 in a plan view, half of which is parallel to its plane of drawing, namely at the level of the line S-S drawn in FIG. 3A is.

The spray head 14 has a hollow cylindrical base body 15. The lower one The end face of this hollow cylinder 15 is open and with an offset to the outside, Brim 16 opened downwards. The hollow cylinder 15 is on his closed upper end face and there has an actuating trough 15a.

From the upper end of the hollow cylinder 15 protrudes toward the center of the spray head 14 is a substantially hollow cylindrical tube extension 17, the Diameter is approximately half the diameter of the hollow cylinder 15. The tube extension 17 and the hollow cylinder 15 are on common Longitudinal axis.

The lower end face of the tube extension 17 is open, and its wall is there flattened inclined towards the center. The tube extension 17 has on it Inner surface, approximately halfway up, one perpendicular to its longitudinal axis extending annular projection 17a, in which the annular flange 4a Exit nozzle 4 can snap into place.

The upper end face of the tubular extension 17 essentially adjoins the upper one Face of the hollow cylinder 15. Near the latter face opens the pipe extension 17 in the direction of the axis S-S to an outlet pipe 18. Die The longitudinal axis S-S of the outlet pipe 18 is perpendicular to the longitudinal axis of the Pipe attachment 17. The outlet pipe 18 essentially has a hollow cylindrical Construction. It crosses the wall of the hollow cylinder 15 and protrudes away from the spray head 14. The end face of the outlet pipe facing away from the spray head 14 18 is designed as an outlet opening 19.

The inner regions of the outlet pipe 18 and the pipe extension 17 are thus connected by a cylindrical channel in a deflection area 20 has a 90 ° change in direction. The inside diameter both the tube extension 17 and the outlet tube 18 each taper a stepped ring shoulder 20a or 20b near the deflection area 20. These two ring shoulders 20a, 20b thus delimit the inner region of the tube extension 17 or the outlet opening 19 of the outlet pipe 18 from the deflection area 20 from.

Inside the outlet opening 19 of the outlet pipe 18 there is an elongated, hollow cylindrical tube attachment 21, which to a large extent from the Outlet pipe 18 protrudes. The outer diameter of the tube attachment 21 is so dimensioned that the tube cap 21 with a tight tolerance in the outlet opening 19 can be inserted so that it is on the ring shoulder 20b of the deflection area 20 triggers. The inner diameter of the tube attachment 21 corresponds essentially to the diameter of the outlet pipe 18 facing Cylinder channel of the deflection area 20. Both end faces of the Tube attachment 21 are open.

It is possible to attach the tube attachment 21 together with the spray head attached 14 for storage in the snap holder 13 of the in Figures 2A and 2B shown to attach the cap 5.

The spray head 14 shown in FIGS. 3A and 3B can be on the outlet nozzle 4 of the container 1 shown in Figure 1 can be attached. The outlet nozzle 4 is inserted into the pipe socket 17 until the upper end the outlet nozzle 4 is seated on the ring shoulder 20a, which the pipe extension 17 from Deflection area 20 of the spray head 14 separates. The ring flange crosses 4a of the outlet nozzle 4, the annular projection 17a within the Pipe attachment 17 and locked with this. The insertion of the outlet nozzle 4 in the tube extension 17 is the inclined flattening of the ring flange 4a Outlet nozzle 4 or the wall of the tube extension 17 facilitated.

If the container 1 is provided with the spray head 14, the inventive can Actuate the spray device by moving the spray head 14 towards of the container 1 is moved. In this case, the outlet nozzle 4 that is on the ring shoulder 20a is seated, actuated in the direction of the container 1. By this actuation of the outlet nozzle 4 flows spray medium from the container 1 through the outlet nozzle 4 into the deflection area 20 of the spray head 14, is deflected in the deflection area 20 in the direction of the outlet pipe 18, and flows out of the outlet opening 19 of the spray head 14 or out of the tube attachment 21. The movement of the spray head 14 in the direction of the container 1 is facilitated by the operating trough 15a. Through this, if that Container 1 is gripped with one hand, the spray head 14 easily with a single Fingers are operated.

When the spray head 14 is actuated in the direction of the container 1, it attacks the lower end face of the hollow cylinder 15 formed brim 16 in the annular Indentation 3 in the metal lid 2 of the container 1 the outflow of spray medium flowing out of the outlet nozzle 4 the tube extension 17 and the hollow cylinder 15 back in the direction of the container 1 disabled.

If the sprayer is used for blow cleaning purposes , it makes sense if the tube attachment 21 is inserted into the outlet opening 19 is. If the spray head 14 is now in the upright position of the container 1 is actuated in the direction of the container 1, gaseous spray flows from the container 1 through the outlet nozzle 4, the deflection region 20 of the Spray head 14 and the tube attachment 21. While using the spray the tube attachment 21 can be delivered particularly well, that is Blow-out cleaning also with the help of the spray head 14 without attached tube attachment 21 possible.

If, however, the spray device according to the invention for the purpose of cooling or icing is to be used, the container 1 must be upside down be provided so that the liquefied part of the gas mixture contained can escape can. The spray head 14 is in this position in the direction of the container 1 actuated, liquefied spray flows through the outlet nozzle 4, the Deflection area 20 and the outlet pipe 18 from the outlet opening 19 of the spray head 14. The spray evaporates and is therefore located in a cooled, gaseous state. This mode of operation of the invention Spray device can be used, for example, to or icing substances adhering to mobile textiles, such as chewing gum, in order to be able to easily remove them in the icy condition. At this The tube attachment can be used for the spray device according to the invention 21 be plugged into the spray head 14; however, it is preferred if the Spray head 14 is actuated without attached tube attachment 21.

Thus, the one shown in Figures 1, 2A, 2B, 3A and 3B is according to the invention To use the spray device for at least three different cleaning purposes, namely for drain cleaning, blow-off cleaning and for removing adhesive Substances. For this purpose, the cap 5 only has to be connected with the Spray head 14 are interchanged. The tube cap 21 can be used for blow-out cleaning or for local cold generation of the more targeted delivery of the spray.

Reference list

1

container

2nd

Metal lid

3rd

deepening

4th

Outlet nozzle

4a

Ring flange

5

cap

6

Hollow cylinder

7

upper face

8th

set back area

9

Outflow opening

9a

Ring heel

10th

Pipe neck

10a

Ring projection

11

Sealing cylinder

12th

Longitudinal rib

13

Snap holder

14

spray nozzle

15

Hollow cylinder

15a

Operating trough

16

brim

17th

Pipe neck

17a

Ring projection

18th

Outlet pipe

19th

Outlet opening

20th

Deflection area

20a

Ring heel

20b

Ring heel

21

Tube attachment

Claims (7)

1. A spray apparatus having a tank (1) which includes an exit nozzle (4) and in which a gas mix, which is subjected to pressure, is located as the spray means, and having a removable cap (5) which is arranged at the exit nozzle (4) and which is formed as a hollow cylinder (6), wherein the one end face of the hollow cylinder (6) facing the tank is open and the other end face (7) of the hollow cylinder (6) remote from the tank has an annular surface and, at the centre, a discharge aperture (9) connected to the exit nozzle (4),

   wherein, moreover, a discharge of the spray means from the exit nozzle (4) through the discharge aperture (9) can be effected by an actuation of the cap (5) relative to the tank (1), and

   wherein, for a cleaning of a drain, the cap (5) can be set along its annular surface at an opening of a drain, in particular of a waste water drain of a sink, such that when the tank (1) is actuated in the direction of the cap (5) set at the drain opening, the escaping of spray means flowing out of the discharge aperture (9) in any other direction than that of the drain is prevented,

   characterised in that the gas mix is partly liquefied; and in that a spray head (14) is provided for the use of the spray apparatus alternately for local cold production or for blow cleaning, said spray head (14) being able to be attached to the tank (1) in the region of the exit nozzle (4) when the cap (5) is removed and having an exit aperture (19) connected to the exit nozzle (4) of the tank (1), wherein, depending on the vertical position of the tank (1), a liquid or a gaseous portion of the spray means can be directly emitted through the exit nozzle (4) of the tank (1) from the exit aperture (19) of the spray head (14) by an actuation of the spray head (14) in the direction of the tank (1).
2. A spray apparatus in accordance with claim 1, characterised in that the end face (7) of the cap (5) remote from the tank is arched in an outwardly convex manner, is set back at the centre in the direction of the tank and has, at the centre of the set-back region (8), the discharge aperture (9) from which a pipe nose (10) projects in the direction of the tank and can engage around the exit nozzle (4) of the tank (1) and/or can be latched to the exit nozzle (4); and/or in that the cap (5) is an injection moulded part made in an injection moulding method; and/or in that the cap (5) can be latched to the tank (1).
3. A spray apparatus in accordance with any of the preceding claims, characterised in that the spray head (14) effects a deflection of the spray means; and/or in that the spray head (14) can be latched to the tank (1) and/or the exit nozzle (4) of the tank (1); and/or in that a pipe top (21) can be inserted into the exit aperture (19) of the spray head (14) for the direct emission of the spray means.
4. A spray apparatus in accordance with any of the preceding claims, characterised in that the discharge aperture (9) of the cap (5) is formed in hose shape or in pipe shape for the direct emission of the spray means; and/or in that a spray hose or a spray pipe can be attached to the discharge aperture (9) of the cap (5), through which hose or pipe spray means flowing out of the discharge aperture (9) can escape for a direct emission, with the spray pipe in particular effecting a deflection of the spray means; and/or in that the cap (5) has a catch holder (13) in which a pipe top (21) of the spray head (14), a spray hose or a spray pipe can be latched.
5. A spray apparatus in accordance with any of the preceding claims, characterised in that the cap (5) is formed as a triangular cap or a round cap such that its side having the discharge aperture (9) can be set at an opening of a drain, in particular of a flushed water drain of a urinal or a flush toilet, in particular along a triangular or essentially round annular surface such that the escape of spray means flowing out of the discharge aperture (9) in directions other than that of the drain is prevented;

   and/or

   in that the cap (5) is flexible at the end face having the discharge aperture (9) such that the shape of this end face can be matched to the shape of an opening of a drain when set at said opening such that the escape of spray means flowing out of the discharge aperture (9) in directions other than that of the drain is prevented;

   and/or

   in that the cap (5) has a sealing element, in particular an annular rubber seal, at the end face having the discharge aperture (9), by means of which sealing element the escape of spray means flowing out of the discharge aperture (9) in directions other than that of the drain is prevented.
6. A spray apparatus in accordance with any of the preceding claims, characterised in that the tank (1) is a cylindrical metal can, with in particular the peripheral surface of the metal can narrowing towards an end face at whose centre the discharge aperture is arranged;

   and/or

   in that the pressure, to which the spray means is exposed inside the tank (1), is greater than the atmospheric pressure and in particular amounts to a multiple of the atmospheric pressure, preferably 8 bar;

   and/or

   in that between 75 and 95%, preferably 85%, of propellant, in particular of F134a, is contained in the gas mix;

   and/or

   in that between 5 and 10%, preferably 8%, of dimethyl ether is contained in the gas mix.
7. Use of a spray apparatus in accordance with any of the preceding claims

   for the production of a freezing;

   and/or

   for the locating of thermal defects or thermal interruptions, in particular in electrical components, with the aid of the local cold production;

   and/or

   for the production of a local cooling or freezing of an adhesive substance, in particular chewing gum, such that the substance can be removed in a viscous or frozen state from an object, in particular clothing fabric or furniture fabric, to which it is sticking;

   and/or

   for the blow cleaning of fluid lines, in particular fuel lines in internal combustion engines.

Images