DE102023103692A1 - Nozzle device and spray device with a nozzle device - Google Patents

Abstract

The present invention relates to a nozzle device (100) for cleaning purposes, which is connected or can be connected to a cleaning lance (104), comprising a housing (110) on which a fluid inlet (120) is arranged or formed, a first fluid outlet (148) with a first outlet opening (150) and a second fluid outlet (166) with a second outlet opening (168), wherein the fluid outlets (148, 166) are spatially spaced from one another and the outlet openings (150, 168) have different opening cross-sections, wherein the nozzle device (100) comprises a fluid-actuated and in particular pressure-actuated switching body (178) arranged in the housing (110), which can be transferred from a low-pressure position to a high-pressure position and vice versa, wherein the fluid inlet (120) in the low-pressure position of the switching body (178) is in flow connection with the one The switching body (178) is in flow connection with the first fluid outlet (148) forming a low-pressure outlet and, in the high-pressure position of the switching body (178), is in flow connection with the second fluid outlet (166) forming a high-pressure outlet. The invention also relates to a spray device with a nozzle device.

Description

The present invention relates to a nozzle device for cleaning purposes, which is connected or can be connected to a cleaning lance and which comprises a fluid inlet and two fluid outlets.

Furthermore, the present invention relates to a spray device which has a cleaning lance and a nozzle device connected to it.

Such a spray device with a cleaning lance is used, for example, in cleaning facilities for motor vehicles, for example so-called self-service washing stations. The spray device is usually operated manually with two hands or one hand, with a pistol-grip-shaped handle device typically arranged on the cleaning lance. A cleaning liquid is supplied via a supply line. The cleaning liquid is usually water, to which a cleaning chemical can be added to increase the cleaning performance or to create foam. Compressed air can also be used for foaming. The supplied cleaning liquid is sprayed via the nozzle device.

Nozzle devices are known in which either a first cleaning liquid or a second cleaning liquid can be sprayed. For example, the first cleaning liquid is mixed with a cleaning chemical and is foamed, for example with the aid of compressed air. The second cleaning liquid is, for example, water under high pressure. During the cleaning processes, for example, the foamed first cleaning liquid is sprayed first (if necessary after a rough cleaning of the vehicle). The vehicle is then cleaned with the second cleaning liquid under high pressure.

Nozzle devices are known in which the user can manually bring either the first fluid outlet or the second fluid outlet into flow connection with the fluid inlet.

The object of the present invention is to provide a nozzle device that is user-friendly. Furthermore, it is an object to provide a spray device with such a nozzle device.

The above-mentioned object is achieved by a nozzle device according to the invention for cleaning purposes, which is connected or can be connected to a cleaning lance, comprising a housing on which a fluid inlet is arranged or formed, a first fluid outlet with a first outlet opening and a second fluid outlet with a second outlet opening, wherein the fluid outlets are spatially spaced from one another and the outlet openings have different opening cross-sections, wherein the nozzle device comprises a fluid-actuated and in particular pressure-actuated switching body arranged in the housing, which can be transferred from a low-pressure position to a high-pressure position and vice versa, wherein the fluid inlet is in flow connection with the first fluid outlet forming a low-pressure outlet in the low-pressure position of the switching body and is in flow connection with the second fluid outlet forming a high-pressure outlet in the high-pressure position of the switching body.

In the nozzle device according to the invention, user-friendly handling can be achieved in particular by providing a switching body in the housing. The switching body can assume a low-pressure position and a high-pressure position. In the present case, "low pressure" and "high pressure" can refer in particular to the pressure of the cleaning fluid supplied. The "high pressure" can be a pressure above a threshold pressure. In practice, foamed cleaning fluid with added cleaning chemicals usually has a lower pressure in particular when used as intended than cleaning fluid that is subjected to high pressure. In the low-pressure position, the fluid inlet is in flow connection with the first fluid outlet, the low-pressure outlet. The switching body can be transferred to the high-pressure position by fluid actuation and in particular pressure actuation. In the high-pressure position, the fluid inlet is in flow connection with the second fluid outlet, the high-pressure outlet. In this way, the cleaning fluid is preferably automatically applied to the correct fluid outlet without any action on the part of the user to spray the cleaning fluid. The low-pressure outlet usually has a significantly larger opening cross-section than the high-pressure outlet.

It can be provided that in at least one of the low-pressure position and the high-pressure position, i.e. one of the aforementioned positions, the fluid inlet is connected to only one of the fluid outlets.

It can be provided that in at least one of the low-pressure position and the high-pressure position the fluid inlet is connected to both of the fluid outlets. Accordingly, it can be provided that in one of the aforementioned positions cleaning fluid can exit through both the first fluid outlet and the second fluid outlet. For example, in the low-pressure position there is a flow connection from the fluid inlet to both fluid outlets. However, cleaning fluid under low pressure, in particular foamed cleaning fluid, only exits the second fluid outlet to a small extent if its outlet opening has a significantly smaller opening cross-section than the outlet opening of the first fluid outlet.

It is advantageous if the switching body is mounted so that it can move in the housing, with the housing forming a guide element for guiding the switching body. In this way, reliable functioning of the nozzle device can be ensured.

It is advantageous if the nozzle device comprises a reset element, against the reset force of which the switching body can be moved from the low-pressure position to the high-pressure position. In a "basic position", for example, the switching body assumes the low-pressure position. If the fluid pressure is sufficient, the reset force of the reset element can be overcome and the switching body can be moved to the high-pressure position. If the pressure falls below a threshold value, the switching body preferably automatically returns to the low-pressure position, under the reset force of the reset element.

The return element is, for example, a helical spring, which is in particular a compression spring. The helical spring can be supported directly or indirectly on the housing and on the switching body. For example, the helical spring is supported on an insert that forms the first fluid outlet and is inserted into the housing. The helical spring is preferably supported directly on the switching body.

A fluid chamber can be formed in the housing.

For example, it is provided that the fluid inlet opens directly or indirectly via an inlet channel into a fluid space formed in the housing, wherein the fluid space opens via a first channel opening into a first outlet channel in the direction of the first fluid outlet or the outlet opening and via a second channel opening into a second outlet channel in the direction of the second fluid outlet or the second outlet opening. The cleaning liquid enters the fluid space directly via the fluid inlet or indirectly via the inlet channel. The cleaning liquid can flow to the first outlet opening or the second outlet opening via the respective outlet channel.

If an inlet channel is provided, the inlet channel can, for example, be aligned at an angle relative to the fluid inlet, the angle being approximately 10° to 40°, in particular approximately 20° to 30° (the smaller of the two angles between the fluid inlet and the inlet channel). The provision of an angle can prove advantageous in a preferred embodiment for a compact design and simple manufacture of the nozzle device.

The fluid inlet or inlet channel is preferably aligned with the first channel opening.

It can be provided that an outlet opening of the fluid inlet or the inlet channel and the channel openings are arranged on opposite walls of the fluid space.

It can be advantageous if the switching body comprises an impact section and an engagement section protruding from it, the impact section being arranged in the fluid space and being able to be acted upon by liquid entering the fluid space on the upstream side, the engagement section engaging in the first outlet channel. The incoming liquid can act upon the impact section and move it, for example, at sufficiently high pressure, in particular against the restoring force of a restoring element. The switching body can be stabilized in terms of its position relative to the housing via the engagement section and can preferably be guided along it. This will be discussed below.

The fluid inlet or inlet channel is advantageously aligned directly with the impact section.

It can be advantageous if the impact section in the high-pressure position preferably lies sealingly against an edge of the first channel opening and covers it, and if the impact section in the low-pressure position is raised from the edge of the first channel opening. In the high-pressure position, the switching body therefore assumes a defined position relative to the housing and can in particular close the first outlet channel in such a way that cleaning fluid only exits via the second fluid outlet.

The impact section can also be referred to as a sealing section and/or a covering section.

It can be provided that the impact section in the low-pressure position rests against a wall of the fluid chamber that is opposite the first channel opening. This allows the switching body to assume a defined position relative to the housing in the low-pressure position.

It can be provided that the impact section covers an outlet opening of the fluid inlet or the inlet channel in the low-pressure position. This can ensure that incoming cleaning fluid hits the impact section directly, which can prove to be advantageous for reliable function.

For example, at least one projection can be arranged or formed on the impact section, via which the impact section is supported on a wall of the fluid space in the low-pressure position, with liquid flowing past at least one projection into the fluid space. In the low-pressure position, liquid can thus enter the fluid space without the impact section having to be lifted from the outlet opening of the fluid inlet or the inlet channel. In the case of low pressure, for example, the liquid can, as already mentioned, exit through both outlet openings. However, with a significantly smaller cross-sectional area at the high-pressure outlet, the liquid predominantly reaches the low-pressure outlet. For example, approximately 90% of the liquid exits through the low-pressure outlet and approximately 10% through the high-pressure outlet.

For example, a plurality of projections can be provided which are separated from one another by gaps through which the liquid can flow. For example, the projections are positioned equidistant from one another, in particular along an edge of the impact section.

The impact section can, for example, be plate-shaped, apart from the at least one projection.

It can prove advantageous if the impact section, particularly in the low-pressure position, can be surrounded by incoming liquid in the fluid space and if at least one inlet opening is formed on the engagement section through which the liquid flows out of the fluid space in the direction of the first fluid outlet. The liquid enters the engagement section through the at least one inlet opening, which in turn engages in the first outlet channel. Accordingly, it can be provided that the liquid flows within the engagement section, which is arranged in the outlet channel. The liquid can reach the first fluid outlet via the engagement section.

Advantageously, the engagement section in the low-pressure position of the switching body is arranged at least in sections in the fluid space such that the inlet openings are exposed and the liquid can flow through the inlet openings.

For example, the inlet openings in the high-pressure position of the switching body are blocked, for example by the housing, so that no flow can pass through them.

It may prove advantageous if a plurality of inlet openings are provided in order to provide a larger volume flow of the low-pressure liquid.

In practice, it can prove advantageous if at least one inlet opening is a slotted hole. It has been shown that this can achieve favorable flow behavior in the housing.

The plurality of inlet openings are preferably arranged equidistant from one another along a circumference of the engagement portion.

As already mentioned, the switching body can be guided in the housing. For example, the engagement section forms a guide section which rests on the inside against a channel wall of the first outlet channel and is guided by it. The housing forms the above-mentioned guide element via the channel wall.

With regard to a compact design, it can be advantageous if the return element is accommodated in the switching body, whereby it is supported on the impact section and surrounded by the engagement section.

It can be advantageous if the switching body comprises or forms a closed sleeve, the engagement section forming a jacket of the sleeve and the impact section forming a base of the sleeve, which projects radially with an edge beyond the engagement section, the edge preferably sealingly abutting the edge of the first channel opening in the high-pressure position. The return element can in particular be accommodated in the sleeve.

The first fluid outlet and the second fluid outlet can be aligned parallel to each other. At least one fluid outlet can be aligned parallel to the fluid inlet. The fluid outlets and the fluid inlet can, for example, form a define the respective axis, whereby the respective axes can then be aligned parallel to each other.

The first fluid outlet and/or the second fluid outlet can be formed by an insert that is arranged in a form-fitting manner on a receiving opening of the housing and is preferably sealed relative to the housing via a sealing element. In this way, the insert can be formed separately from the housing, which can bring advantages in terms of manufacturing. To connect it to the housing, the insert is inserted into the receiving opening of the housing, for example via a screw connection or press fit, if necessary with the sealing element interposed.

For example, the nozzle device may comprise an outer ring surrounding the housing in the circumferential direction to facilitate handling by the user.

The housing can be a single piece. Alternatively, a multi-part design of the housing with two or more housing parts is conceivable. The housing parts can be connected to one another by force and/or form-fitting.

The object mentioned at the outset is achieved by a spray device according to the invention. The spray device according to the invention comprises a cleaning lance and a nozzle device of the type described above connected to it.

The advantages that have already been mentioned in connection with the explanation of the nozzle device according to the invention can also be achieved with the spray device. Advantageous embodiments of the spray device according to the invention result from advantageous embodiments of the nozzle device according to the invention. In this regard, reference is made to the above explanations.

The cleaning lance is particularly hand-held and is used, for example, in self-service car washes.

• 1: eine perspektivische Darstellung der erfindungsgemäßen Düseneinrichtung;
• 2: eine weitere perspektivische Darstellung der Düseneinrichtung aus 1;
• 3: eine Längsschnittansicht der Düseneinrichtung aus 1, wobei ein Umschaltkörper eine Niederdruckstellung einnimmt;
• 4: eine Darstellung entsprechend 3, wobei der Umschaltkörper eine Hochdruckstellung einnimmt;
• 5: eine perspektivische Darstellung des Umschaltkörpers; und
• 6: eine erfindungsgemäße Sprühvorrichtung mit einer Reinigungslanze und der Düseneinrichtung aus 1.

The following description of preferred embodiments of the invention serves to explain the invention in more detail in conjunction with the drawing. They show:

• 1 : a perspective view of the nozzle device according to the invention;
• 2 : another perspective view of the nozzle device from 1 ;
• 3 : a longitudinal sectional view of the nozzle device from 1 , wherein a switching body assumes a low pressure position;
• 4 : a representation corresponding 3 , wherein the switching body assumes a high pressure position;
• 5 : a perspective view of the switching body; and
• 6 : a spray device according to the invention with a cleaning lance and the nozzle device from 1 .

The 1 to 4 show an advantageous embodiment of the nozzle device according to the invention, which is designated overall by the reference numeral 100. The nozzle device 100 is intended for cleaning purposes and in the present case is part of a spray device 102 according to the invention, which is shown schematically in 6 is shown.

The spray device 102 comprises a cleaning lance 104, to which the nozzle device is connected on the output side. A cleaning liquid can be supplied via a supply line 106, which is to be sprayed with the spray device.

The spray device 102 is hand-held and comprises a handle device 108 in the form of a pistol grip for guidance by the user.

For example, the spray device 102 is used in a self-service (SB) car wash system. For example, a first cleaning liquid can be supplied, which is foamed using a cleaning chemical and compressed air and has a low pressure. Alternatively, a second cleaning liquid can be supplied. This is, for example, water under high pressure. The nozzle device can be used to automatically switch without the user having to do anything, which cleaning liquid is sprayed, the cleaning liquid with low pressure or the cleaning liquid with high pressure.

The nozzle device 100 comprises a housing 110. The housing 110 is made, for example, from a metal material or from a plastic material. In the present case, the housing 110 comprises a first housing part 112, which is arranged upstream with respect to the flow direction of the liquid, and a second housing part 114, which is arranged downstream.

The first housing part 112 has an end wall 116. A circumferential side wall 118 protrudes from the end wall 116. A fluid inlet 120 is arranged on the housing on the upstream side, which is formed by the first housing part 112. The fluid inlet 120 protrudes from the end wall 116.

The nozzle device 100 is connected to the cleaning lance 104 via the fluid inlet 120 and is in flow connection with it. For this purpose, for example, a thread can be arranged on the fluid inlet 120. Alternatively, a plug or snap connection is conceivable. The fluid inlet 120 forms an opening 122 through which cleaning liquid can enter. The fluid inlet 120 defines an axis 124.

The fluid inlet 120 opens into an inlet channel 126 which defines an axis 128. The inlet channel 126 is aligned at an angle relative to the fluid inlet 120. The (smaller of the two) angle between the axes 124, 128 is approximately 25°.

The inlet channel 126 opens via an outlet opening 130 into a fluid chamber 132 formed in the housing 110. The fluid chamber is delimited by the front wall 116 and the side wall 118. Opposite the side wall 118, the fluid chamber is delimited by the second housing part 114.

The second housing part 114 is sealingly connected to the first housing part 112. For example, the housing part 114 is screwed into the housing part 112.

A free end 134 of the side wall 118 surrounds the housing part 114 in the circumferential direction.

A first outlet channel 136 is formed in the housing part 114, wherein the fluid space 132 opens into the first outlet channel 136 via a first channel opening 138.

In a corresponding manner, a second outlet channel 140 is formed in the housing part 114, into which the fluid space 132 opens via a second channel opening 142.

The outlet channels 136, 140 run parallel to one another. The channel openings 138, 142 are formed at a distance from one another in an end wall 144 of the housing part 114, which delimits the fluid space 132.

The inlet channel 126 is aligned with the first channel opening 138. As a result, the inlet channel 126 points in the direction of the first outlet channel 136, but not in the direction of the second outlet channel 140.

In relation to the flow direction, the first outlet channel 136 has a greater extension than the second outlet channel 140. Walls of the channels on the housing part 114 form a step 146 of the housing 110 in the transition region.

The nozzle device 100 comprises a first fluid outlet 148 arranged on the housing 112, which comprises a first outlet opening 150. In the present case, the fluid outlet 148 is a low-pressure outlet through which the cleaning liquid can be discharged at low pressure in the foamed state. For this purpose, the opening cross-section of the first outlet opening 150 is relatively large.

In the present case, the fluid outlet 148 is not formed by one of the housing parts 112, 114 itself. Instead, an insert 152 forms the fluid outlet 148. The fluid outlet 148 is inserted on the outflow side into a receiving opening 154 on the first outlet channel 136. The insert 152 is sealed relative to the outlet channel 136 and then relative to the housing 110 via a sealing element 156.

Upstream, the fluid outlet 148 has a circumferential side wall 158. The side wall 158 is jacket-shaped. At least one through-opening 160 is formed in the side wall 158. In the present case, several through-openings 160 are provided, which are advantageously positioned equidistant from one another in the circumferential direction of the side wall 158.

The side wall 158 is spaced apart from the wall of the first outlet channel 136 so that a gap 162 is formed between them.

The fluid outlet 148 defines an axis 164. The axis 164 is arranged parallel to the axis 124 but spaced relative thereto.

The nozzle device 100 further comprises a second fluid outlet 166 arranged on the housing 112, through which a liquid is discharged at high pressure during operation, in particular water under high pressure. The second fluid outlet 166 has a second outlet opening 168, the cross-sectional area of which is relatively small. In particular, the cross-sectional area of the second outlet opening 168 is significantly smaller than the cross-sectional area of the first outlet opening 150.

In the present case, the second fluid outlet 166 is also not formed by one of the housing parts 112, 114. Instead, an insert 170 forms the fluid outlet 166. The insert 170 is inserted into a receiving opening 172 on the second outlet channel 140 and is preferably sealed relative to the outlet channel 140.

The inserts 152, 170 can be screwed into the respective receiving opening 154, 172, for example, or are held by a press fit.

The fluid outlet 166 defines an axis 174. The axis 174 is aligned parallel to the axis 124 but spaced relative thereto. The fluid outlets 148 and 166 are arranged spatially spaced from each other on the housing 112.

The nozzle device 100 includes an outer ring 176 for gripping by a user. The outer ring 176 surrounds the housing 110 and is made of, for example, a rubber material.

The nozzle device 100 comprises a switching body 178 to influence the flow direction of the supplied liquid depending on its pressure to the first fluid outlet 148 or second fluid outlet 166.

In the present embodiment, the switching body 178 is essentially sleeve-shaped with a closed sleeve 180, which 5 is shown in perspective.

The switching body 178 comprises an impact section 182 which forms a bottom 184 of the sleeve 180. In addition, the switching body 178 comprises an engagement section 186. The engagement section 186 protrudes from the impact section in the axial direction of the first outlet channel 136. The engagement section 186 forms a jacket 188 of the sleeve 180.

At least one inlet opening 190 is formed on the engagement section 186. In the present case, several inlet openings 190 are provided (for example four). The inlet openings 190 are arranged equidistant from one another in the circumferential direction of the engagement section 186. The inlet openings 190 are in the present case elongated holes.

The switching body 178 is arranged in a movable and in particular displaceable manner in the housing 110. The switching body 178 is displaceably mounted on the second housing part 114. The wall of the first outlet channel 136 forms a guide element 192 for the switching body 178. The engagement section 186 forms a guide section 194. The switching body 178 is dimensioned such that it engages in the first outlet channel 136 in a form-fitting manner.

In the radial direction, the impact portion 182 projects beyond the engagement portion 186 with an edge 196.

Apart from at least one projection 198 on the upstream side, the impact section 182 is plate-shaped. In the present case, several projections 198 are provided, for example six. The projections 198 protrude in the direction of the end wall 116. Intermediate spaces 200 are arranged between the projections 198.

The projections 198 are arranged along the side opposite the edge 196 upstream of the edge of the impact section 182.

As mentioned, the switching body 178 can be displaced in the housing 110. The displacement takes place against the restoring force of a restoring element 202. The restoring element 202 is in this case a helical spring 204, which is designed as a compression spring.

In the present example, the coil spring 204 is accommodated in the switching body 178, whereby it can be supported on the impact section 182 and is surrounded by the engagement section 186.

The first end of the coil spring 204 rests on the base 184. The second end of the coil spring 204 rests indirectly, via the insert 152, on the housing 110 and in particular on the housing part 114. The second end rests on the front side on the side wall 158 of the insert 152.

3 shows the nozzle device 100 when it is not exposed to liquid or when the liquid has a relatively low pressure. In this case, the switching body 178 assumes a low-pressure position. Under the action of the coil spring 204, the switching body 178 is held in the low-pressure position. In this case, the impact section 182 rests against the end wall 116 via the projections 198. The impact section 182 covers the outlet opening 130, but does not seal it.

The inflowing liquid passes through the fluid inlet 120 and the inlet channel 126 and further through the gaps 200 into the fluid chamber 132.

In the low pressure position, the liquid can flow around the impact section 182 in the fluid chamber 132. The engagement section 186 is displaced so far into the fluid chamber 132 that the inlet openings 190 are exposed. The liquid passes through the inlet openings 190 and flows inside the sleeve 180 in the direction of the first fluid outlet 148. The cleaning liquid can be sprayed through the fluid outlet 148.

In the low pressure position, part of the liquid in the fluid chamber 132 can be discharged via the second outlet channel 140 and the second fluid outlet 166 However, since the cross section of the second outlet opening 168 is significantly smaller than the cross section of the first outlet opening 150, this only represents a relatively small proportion of the cleaning fluid, for example approximately 10%.

4 represents the nozzle device 100 when the liquid has a pressure that exceeds a threshold pressure (referred to as "high pressure" in the present context). The switching body 178 assumes a high pressure position.

The inflowing liquid acts on the impact section 182. It can be advantageous here if the inlet channel 126 is directed directly onto the impact section 182.

Under the effect of the fluid pressure, the switching body 178 is axially displaced against the restoring force of the coil spring 204 until the edge 196 sealingly rests against an edge 206 of the first channel opening 138.

After the switching body 178 is moved into the high pressure position, the inlet openings 190 are blocked. The inlet openings 190 move into the first outlet channel 136 when moved and cannot be flowed through, so that no liquid can flow to the first fluid outlet 148.

The liquid can flow via the second outlet channel 140 to the second fluid outlet 166 and be sprayed from it.

When moving the switching body 178, it is advantageous that the through openings 160 are present at the first fluid outlet 148. These serve to relieve pressure by allowing any liquid still present in the first outlet channel 136 to escape via the first outlet opening 150.

If the pressure of the liquid falls below the threshold pressure, the switching body 178 is moved back to the low-pressure position by the restoring force of the coil spring 204.

List of reference symbols

100

Nozzle device

102

Spray device

104

Cleaning lance

106

Supply line

108

Handle device

110

Housing

112

first housing part

114

second housing part

116, 144

Front wall

118, 158

Side wall

120

Fluid inlet

122

opening

124, 128, 164, 174

axis

126

Inlet channel

130

Outlet opening

132

Fluid space

134

free end

136

first exhaust port

138

first channel opening

140

second exhaust port

142

second channel opening

146

Level

148

first fluid outlet

150

first outlet opening

152, 170

Mission

154, 172

Receiving opening

156

Sealing element

160

Passage opening

162,200

Space

166

second fluid outlet

168

second outlet opening

176

Outer ring

178

Switch body

180

Sleeve

182

Impact section

184

Floor

186

Intervention section

188

Coat

190

Inlet opening

192

Guide element

194

Guide section

196,206

edge

198

projection

202

Reset element

204

Coil spring

Claims (22)

Nozzle device (100) for cleaning purposes, which is connected or can be connected to a cleaning lance (104), comprising a housing (110) on which a fluid inlet (120) is arranged or formed, a first fluid outlet (148) with a first outlet opening (150) and a second fluid outlet (166) with a second outlet opening (168), wherein the fluid outlets (148, 166) are spatially spaced from one another and the outlet openings (150, 168) have different opening cross-sections, wherein the nozzle device (100) comprises a fluid-actuated and in particular pressure-actuated switching body (178) arranged in the housing (110), which can be transferred from a low-pressure position to a high-pressure position and vice versa, wherein the fluid inlet (120) in the low-pressure position of the switching body (178) is in flow connection with the low-pressure outlet forming first fluid outlet (148) and in the high pressure position of the switching body (178) is in flow connection with the second fluid outlet (166) forming a high pressure outlet. Nozzle device (100) according to Claim 1 , characterized in that at least one of the following applies: - in at least one of the low pressure position and the high pressure position, the fluid inlet (120) is fluidly connected to only one of the fluid outlets (148, 166); - in at least one of the low pressure position and the high pressure position, the fluid inlet (120) is fluidly connected to both fluid outlets (148, 166). Nozzle device (100) according to Claim 1 or 2 , characterized in that the switching body (178) is displaceably mounted in the housing (110) and that the housing (110) forms a guide element (192) for guiding the switching body (178). Nozzle device (100) according to one of the preceding claims, characterized in that the nozzle device (100) comprises a restoring element (202), against the restoring force of which the switching body (178) can be transferred from the low-pressure position to the high-pressure position, wherein the restoring element (202) is in particular a helical spring (204) supported directly or indirectly on the housing (110) and on the switching body (178). Nozzle device (100) according to one of the preceding claims, characterized in that the fluid inlet (120) opens directly or indirectly via an inlet channel (126) into a fluid space (132) formed in the housing (110), wherein the fluid space (132) opens via a first channel opening (138) into a first outlet channel (136) in the direction of the first fluid outlet (148) or the first outlet opening (150) and via a second channel opening (142) into a second outlet channel (140) in the direction of the second fluid outlet (166) or the second outlet opening (168). Nozzle device (100) according to Claim 5 , characterized in that the inlet channel (126) is aligned at an angle relative to the fluid inlet (120), wherein the angle is approximately 10° to 40°, in particular approximately 20° to 30°, and/or that the fluid inlet (120) or the inlet channel (126) is aligned with the first channel opening (138). Nozzle device (100) according to Claim 5 or 6 , characterized in that an outlet opening (130) of the fluid inlet (120) or the inlet channel (126) and the channel openings (138, 142) are arranged on opposite walls (116, 144) of the fluid space (132). Nozzle device (100) according to one of the Claims 5 until 7 , characterized in that the switching body (178) comprises an impact section (182) and an engagement section (186) protruding therefrom, wherein the impact section (182) is arranged in the fluid space (132) and can be acted upon on the upstream side by liquid entering the fluid space (132), and wherein the engagement section (186) engages in the first outlet channel (136). Nozzle device (100) according to Claim 8 , characterized in that the fluid inlet (120) or the inlet channel (126) is directly aligned with the impact section (182). Nozzle device (100) according to Claim 8 or 9 , characterized in that the impact section (182) in the high-pressure position preferably rests in a sealing manner on an edge (196, 206) of the first channel opening (138) and covers the latter, and that the impact section (182) in the low-pressure position is raised from the edge (196, 206) of the first channel opening (138). Nozzle device (100) according to one of the Claims 8 until 10 , characterized in that the impact section (182) in the low-pressure position rests against a wall of the fluid chamber (132) which is opposite the first channel opening (138) and/or that the impact section (182) in the low-pressure position covers an outlet opening (130) of the fluid inlet (120) or of the inlet channel (126). Nozzle device (100) according to one of the Claims 8 until 11 , characterized in that at least one projection (198) is arranged or formed on the impact section (182), via which the impact section (182) is supported on a wall (116) of the fluid space (132) in the low-pressure position, wherein liquid flows past the at least one projection (198) into the fluid space (132). Nozzle device (100) according to Claim 12 , characterized in that a plurality of projections (198) are provided which are separated from one another by intermediate spaces (162, 200) through which the liquid can flow. Nozzle device (100) according to one of the Claims 8 until 13 , characterized in that the impact section (182), in particular in the low-pressure position, can be surrounded by incoming liquid in the fluid space (132) and that at least one inlet opening (190) is formed on the engagement section (186), through which the liquid flows out of the fluid space (132) in the direction of the first fluid outlet (148). Nozzle device (100) according to Claim 14 , characterized in that a plurality of inlet openings (190) are provided and/or that the at least one inlet opening (190) is an elongated hole. Nozzle device (100) according to one of the Claims 8 until 15 , characterized in that the engagement portion (186) forms a guide portion (194) which rests on the inside against a channel wall of the first outlet channel (136) and is guided by this. Nozzle device (100) according to one of the Claims 8 until 16 , characterized in that the return element (202) is accommodated in the switching body (178), wherein it is supported on the impact portion (182) and is surrounded by the engagement portion (186). Nozzle device (100) according to one of the Claims 8 until 17 , characterized in that the switching body (178) comprises or forms a closed sleeve (180), wherein the engagement portion (186) forms a jacket (188) of the sleeve (180) and the impact portion (182) forms a bottom (184) of the sleeve (180), which projects radially with an edge (196) beyond the engagement portion (186), wherein the edge (196) in the high-pressure position preferably rests sealingly against the edge (206) of the first channel opening (138). Nozzle device (100) according to one of the preceding claims, characterized in that the first fluid outlet (148) and the second fluid outlet (166) are aligned parallel to one another and/or that at least one fluid outlet (148, 166) is aligned parallel to the fluid inlet (120). Nozzle device (100) according to one of the preceding claims, characterized in that the first fluid outlet (148) and/or the second fluid outlet (166) are formed by an insert (152, 170) which is arranged in a form-fitting manner in a receiving opening (154, 172) of the housing (110) and is preferably sealed relative to the housing (110) via a sealing element (156). Nozzle device (100) according to one of the preceding claims, characterized in that the nozzle device (100) comprises an outer ring (176) surrounding the housing (110) in the circumferential direction. Spray device (102) comprising a cleaning lance (104) and a nozzle device (100) connected thereto according to one of the preceding claims.

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