Fluid mixing unit comprising a venturi mixer having a slit-shaped fluid mixing section

Abstract

A fluid mixing unit for mixing a first fluid (510) with a second fluid (520) to produce a fluid mixture (130), comprising: a Venturi mixer (150) with a mixer body (117) extending along a longitudinal axis (205) of the Venturi mixer (150) from an inlet end (113) for the first fluid (510) to flow into the mixer body (117) to an outlet end (132) for the fluid mixture (130) to flow out of the mixer body (117), wherein a slot-shaped constriction (250) is provided in the mixer body (117) along the longitudinal axis (205) between the inlet end (113) and the outlet end (132), at which a slot-shaped fluid mixing section (118) for mixing the first fluid (510) with the second fluid (520) is formed;and an interchangeable distributor pipe (340) with a distributor channel (350) connected to a slotted fluid outlet (360), wherein the slotted fluid outlet (360) is arranged in the region of the slotted constriction (250) in the mixer body (117), and wherein the interchangeable distributor pipe (340) is detachably attached to the mixer body (117).

Description

State of the art

[0001] The present invention relates to a fluid mixing unit for mixing a first fluid with a second fluid to produce a fluid mixture, comprising a Venturi mixer having a mixer body with a slotted fluid mixing section for mixing the first fluid with the second fluid.

[0002] EP 4 080 118 A1 describes such a fluid mixing unit for mixing a first fluid with a second fluid to produce a fluid mixture. This fluid mixing unit is designed like an air-gas mixing unit, in which air from an air supply unit, which constitutes the first fluid, is mixed with gas from a gas supply unit, which constitutes the second fluid, to form a combustible air-gas mixture for an air-gas mixture combustion device with a slotted combustion unit. The air-gas mixing unit has an air-gas mixing section with a slotted cross-section.

[0003] WO 2023 / 166059 A1 describes a fluid mixing unit with a main body having a polygonal cross-section. The main body has a first area for receiving fuel gas and a second area for receiving air. The fluid mixing unit includes an elongated hollow structure located in the first area. This elongated structure has a funnel shape, receives the fuel gas from a gas inlet, and discharges it through an outlet slot at a mixer outlet of the fluid mixing unit. The elongated structure extends transversely to the main body, and the outlet slot generally extends from one end to the other of the mixer outlet. The elongated structure, and thus the outlet slot, only partially covers the mixer outlet.Accordingly, the combustion gas exiting the outlet slot meets the air flowing through the second area of ​​the main body and around the elongated structure at the mixer outlet, creating an air-gas mixture. Disclosure of the invention

[0004] The present invention relates to a fluid mixing unit for mixing a first fluid with a second fluid to produce a fluid mixture, comprising: a Venturi mixer with a mixer body extending along a longitudinal axis of the Venturi mixer from an inlet end for the first fluid to flow into the mixer body to an outlet end for the fluid mixture to flow out of the mixer body, wherein a slot-shaped constriction is provided in the mixer body along the longitudinal axis between the inlet end and the outlet end, at which a slot-shaped fluid mixing section is formed for mixing the first fluid with the second fluid;and an interchangeable distributor pipe with a distributor channel connected to a slotted fluid outlet, wherein the slotted fluid outlet is arranged in the region of the slotted constriction in the mixer body, and wherein the interchangeable distributor pipe is detachably attached to the mixer body.

[0005] By positioning the slotted fluid outlet of the replaceable distributor pipe within the slotted constriction in the mixer body, a compact and space-saving fluid mixing unit can be provided. This allows for a reduction in the corresponding fluid mixture volume within the mixing unit, thereby increasing its operational reliability. Furthermore, the material costs associated with manufacturing the fluid mixing unit can be reduced.

[0006] Furthermore, the provision of the slot-shaped constriction in the mixer body and the slot-shaped fluid outlet of the replaceable distributor tube ensures a suitable mixing rate, as this allows the first and second fluids to be distributed evenly across the slot-shaped fluid mixing section and the cross-section of the Venturi mixer, respectively. In particular, this largely prevents unwanted flow separation and recirculation, thus advantageously reducing the pressure loss of the Venturi mixer in the fluid mixing unit.

[0007] Furthermore, the fluid mixing unit can be manufactured easily and cost-effectively by dividing it into the Venturi mixer and the interchangeable distributor tube. In particular, common manufacturing processes and materials can be used.

[0008] Furthermore, the division into the Venturi mixer and the interchangeable distributor tube allows for simple and quick adaptation of the fluid mixing unit for use with different fluids, since different distributor tubes can be used with a single Venturi mixer. This is particularly advantageous for fluid mixing units that are designed from the outset for use with different fluids, e.g., for use with hydrogen or natural gas, or other gases such as methane.

[0009] Preferably, the slot-shaped fluid mixing section has a length in a longitudinal direction and a width in a lateral direction, wherein the length is at least 1.2 times the width.

[0010] This ensures a simple slot-shaped design for the fluid mixing section.

[0011] Preferably, the distribution channel has a geometric center of gravity and a hydraulic diameter, wherein the distance between the geometric center of gravity and the slotted fluid outlet is at least 80% of the hydraulic diameter.

[0012] This ensures that the corresponding flow directions of the first and second fluids in the slot-shaped fluid mixing section are at least essentially parallel to each other.

[0013] Preferably, the mixer body forms a fluid guidance channel between the inlet end and the slot-shaped constriction, wherein along the longitudinal axis a distance between the slot-shaped fluid outlet and a smallest opening width of the fluid guidance channel is smaller than the smallest opening width of the fluid guidance channel or smaller than an opening width of the slot-shaped fluid outlet.

[0014] Thus, a maximum suction pressure can be easily generated to draw the second fluid from the slotted fluid outlet into the slotted fluid mixing section.

[0015] Preferably, a converging nozzle is arranged on the distribution channel, forming the slot-shaped fluid outlet.

[0016] This allows a position for the maximum intake pressure in the Venturi mixer to be set safely and reliably.

[0017] Preferably, the replaceable distribution pipe is made of plastic, composite material, or metal.

[0018] This allows for the use of widely available, easy-to-process and cost-effective materials for the manufacture of the replaceable distribution pipe.

[0019] Preferably, the replaceable distributor pipe can be arranged at at least two different longitudinal positions along the longitudinal axis of the Venturi mixer.

[0020] This allows an available flow cross-section for the first fluid to be easily adapted to the specific application.

[0021] Preferably, the slot-shaped fluid outlet has an adjustable opening width.

[0022] This allows an available flow cross-section for the second fluid to be adapted to the specific application safely and reliably.

[0023] Preferably, the adjustable opening width is adjustable via at least one adjusting device, in particular an adjusting screw, by deforming the slot-shaped fluid outlet.

[0024] Thus, the adjustable opening width can be set to suit the specific application using a simple and straightforward adjustment device.

[0025] Preferably, the slot-shaped fluid outlet is rectangular or wedge-shaped.

[0026] This ensures a slot-shaped design of the fluid outlet.

[0027] Preferably, at least one axial end of the replaceable distributor pipe arranged in the mixer body is sealed fluid-tight by the mixer body, a cap, or a plug.

[0028] Thus, the axial end of the replaceable distributor pipe located in the mixer body can be easily sealed in a fluid-tight manner.

[0029] Preferably, the mixer body has a lateral opening through which the replaceable distributor pipe engages in the mixer body.

[0030] This allows for a comparatively quick and uncomplicated insertion and replacement of the replaceable distribution pipe.

[0031] Preferably, the replaceable distributor pipe for sealing the mixer body is connected to the mixer body via an associated seal, wherein the associated seal is arranged in the area of ​​the lateral opening.

[0032] This allows for a suitable seal of the mixer body via the associated seal in the area of ​​the side opening.

[0033] Preferably, a retaining flange is provided for fixing the replaceable distribution pipe in the mixer body.

[0034] This allows the replaceable distributor pipe to be fixed robustly and stably in the mixer body.

[0035] Preferably the first fluid is air and the second fluid is a flammable gas, or the first fluid is a flammable gas and the second fluid is air, wherein the fluid mixture is a flammable air-gas mixture for an air-gas mixture combustion device with a slotted combustion unit.

[0036] Thus, the fluid mixing unit can be easily used in an air-gas mixture combustion device with a slotted combustion unit.

[0037] Furthermore, the present invention also relates to an air-gas mixture combustion device with a slot-shaped combustion unit and with an air-gas mixing unit, which is designed according to the type of the fluid mixing unit described above. Brief description of the drawings

[0038] The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawings. The drawings show: Fig. 1 a schematic view of an exemplary air-gas mixture combustion device with a fluid mixing unit comprising a Venturi mixer, Fig. 2 a schematic view of the Venturi mixer of Fig. 1 with a slot-shaped fluid mixing section, Fig. 3 a schematic view of the Venturi mixer of Fig. 2 with an interchangeable distribution pipe according to the present invention, Fig. 4 a schematic view of the interchangeable distribution pipe of Fig. 3 , Fig. 5 a longitudinal section through the Venturi mixer and the replaceable distribution pipe of Fig. 3 , Fig. 6 the longitudinal section through the Venturi mixer and the replaceable distribution pipe of Fig. 5 According to a preferred embodiment and arrangement of the replaceable distributor tube in the Venturi mixer, Fig. 7 Longitudinal sections through the Venturi mixer and the replaceable distributor tube according to Fig. 5 with two exemplary longitudinal positions of the replaceable distributor pipe in the Venturi mixer, Fig. 8 Longitudinal sections through the Venturi mixer and the replaceable distributor pipe according to Fig. 5 with two exemplary opening widths of a slot-shaped fluid outlet of the replaceable distributor tube, Fig. 9 Longitudinal sections through the Venturi mixer and the replaceable distributor tube according to Fig. 5 with two exemplary longitudinal positions of the interchangeable distributor tube in the Venturi mixer and two exemplary opening widths of a slot-shaped fluid outlet of the interchangeable distributor tube, Fig. 10 the longitudinal section through the Venturi mixer and the interchangeable distributor tube of Fig. 5 with an adjusting device for setting the respective opening width of a slot-shaped fluid outlet of the replaceable distributor pipe, Fig. 11 a schematic view of the replaceable distributor pipe of Fig. 3 with a wedge-shaped fluid outlet, Fig. 12 a schematic view of the Venturi mixer and the interchangeable distributor tube according to Fig. 5 To illustrate an exemplary assembly of the replaceable distributor pipe in the Venturi mixer, Fig. 13 shows a schematic view of the Venturi mixer and the replaceable distributor pipe according to Fig. 12 with the fluid-tight, replaceable distributor pipe sealed in the Venturi mixer, Fig. 14 the schematic view of the Venturi mixer and the replaceable distributor pipe of Fig. 12 with the interchangeable distributor pipe sealed fluid-tight in the Venturi mixer according to an alternative variant, Fig. 15 the schematic view of the Venturi mixer and the interchangeable distributor pipe of Fig. 12 with the interchangeable distributor pipe, which is sealed fluid-tight in the Venturi mixer according to another variant, Fig. 16 shows a schematic view of the Venturi mixer and the interchangeable distributor pipe. Fig. 12 with the replaceable distributor tube fixed to the mixer body of the Venturi mixer, Fig. 17 the schematic view of the Venturi mixer and the replaceable distributor tube of Fig. 12 with the fluid-tight, replaceable distributor pipe sealed against the Venturi mixer, Fig. 18 the schematic view of the Venturi mixer and the replaceable distributor pipe of Fig. 12 with the interchangeable distributor pipe, which is sealed fluid-tight against the Venturi mixer according to one variant, Fig. 19 shows a schematic view of the Venturi mixer and the interchangeable distributor pipe. Fig. 12 with the interchangeable distributor pipe, which is sealed fluid-tight against the Venturi mixer according to an alternative variant, Fig. 20 shows a schematic view of the interchangeable distributor pipe. Fig. 3 with a one-piece slotted fluid outlet, and Fig. 21 a schematic view of the replaceable distributor tube of Fig. 3 with a slot-shaped fluid outlet formed from point-shaped openings. Description of the exemplary implementations

[0039] Fig. 1 Figure 1 shows an exemplary fluid-mixture combustion device 100 with a fluid mixing unit 110 according to the present invention and a slot-shaped combustion unit 120. The fluid mixing unit 110 has a Venturi mixer 150 for mixing a first fluid with a second fluid to produce a fluid mixture 130.

[0040] Preferably, the first fluid is air and the second fluid is a gas, in particular a flammable gas, e.g., hydrogen or natural gas, or another flammable gas such as methane. Alternatively, the first fluid can also be a gas and the second fluid air. In both cases, the fluid mixture 130 is preferably a flammable air-gas mixture, in particular a homogeneous mixture of air and gas, so that the fluid mixture combustion device 100 is preferably an air-gas mixture combustion device. This air-gas mixture combustion device can be used, for example, for the combustion of a flammable air-gas mixture in a boiler or, more generally, in a building heating system.

[0041] For illustrative purposes, the fluid-mixture combustion device 100 has a feed unit 112 for supplying a first fluid and a feed unit 116 for supplying a second fluid. If the first fluid is air, the feed unit 112 can include a fan 114, which can be operated at an adjustable fan speed and / or within predetermined fan speed ranges to supply the fluid mixing unit 110 with a suitable, in particular homogeneous, airflow.

[0042] As an example, the first fluid is fed via a feed channel 115 to an inlet end 113 of a mixer body 117 of the Venturi mixer 150 of the fluid mixing unit 110. For this purpose, the feed channel 115 is shown to be integrally formed with the Venturi mixer 150 or at least fluid-tightly connected to it.

[0043] The mixer body 117 extends from the inlet end 113 for the inflow of the first fluid into the mixer body 117 to an outlet end 132 for the outflow of the fluid mixture 130 from the mixer body 117.

[0044] In the mixer body 117, a slot-shaped fluid mixing section 118 is formed between the inlet end 113 and the outlet end 132 for mixing the first fluid with the second fluid.

[0045] For illustrative purposes, the fluid mixture 130 is fed to the combustion unit 120 via the outlet end 132 of the mixer body 117. The outlet end 132 can have a slot-shaped cross-section 133.

[0046] The combustion unit 120 is provided, by way of example, with a burner surface 124, which is arranged downstream of the fluid mixing unit 110, so that the fluid mixture 130, which is formed in the air-gas mixing section 118, flows towards the burner surface 124. The fluid mixture 130 can thus be combusted by the combustion unit 120 and, in particular, at the burner surface 124. By way of example, the burner surface 124 is shown with a flame 122, which is stabilized relative to the burner surface 124.

[0047] Fig. 2 shows the Venturi mixer 150 from Fig. 1 with the mixer body 117, which extends, for illustrative purposes, along a longitudinal axis 205 from the inlet end 113 to the outlet end 132 and forms the slot-shaped fluid mixing section 118. The outlet end 132 has, for illustrative purposes, the slot-shaped cross-section 133, and the slot-shaped fluid mixing section 118 has, for illustrative purposes, a slot-shaped cross-section 215. The slot-shaped fluid mixing section 118 is arranged at a slot-shaped constriction 250 of the mixer body 117, which is provided in the mixer body 117 along the longitudinal axis 205 between the inlet end 113 and the outlet end 132.

[0048] Preferably, the slot-shaped fluid mixing section 118 has a length 222 in a longitudinal direction 225 and a width 232 in a transverse direction 235, wherein the length 222 is at least 1.2 times the width 232. In other words, the slot-shaped cross-section 215 has a first side 220 with a length 222 in the longitudinal direction 225 and a second side 230 with a width 232 in the transverse direction 235, wherein the length 222 is preferably at least 1.2 times the width 232 (i.e., the length 222 is greater than or equal to 1.2 times the width 232). If desired, the length 222 can be less than or equal to 20 times the width 232. Preferably, the length 222 is greater than or equal to 4 times the width 232 and less than or equal to 12 times the width 232.

[0049] Fig. 3 shows the Venturi mixer 150 from Fig. 1 und Fig. 2 with the mixer body 117, which extends illustratively along the longitudinal axis 205 of Fig. 2 extends. According to the present invention, the Venturi mixer 150 is associated with an interchangeable distribution pipe 340, which is detachably attached to the mixer body 117, as shown below. Fig. 12 bis Fig. 19 described. To enable the interchangeability of the replaceable distributor tube 340, it can preferably be pushed laterally into or pulled out of the mixer body 117, as indicated by a double arrow 399. Thus, the Venturi mixer 150 and the replaceable distributor tube 340 are separate components that can be manufactured independently of each other.

[0050] The replaceable distributor pipe 340 has a distributor channel 350 connected to a slotted fluid outlet 360. The distributor channel 350 enables uniform fluid distribution over the entire length of the slotted fluid outlet 360. The slotted fluid outlet 360 can be, for example, rectangular or wedge-shaped and is available in Fig. 3 For example, rectangular. Preferably, a converging nozzle 355 is arranged on the distribution channel 350, which extends along the longitudinal axis 205 away from the distribution channel 350 and forms the slot-shaped fluid outlet 360. Preferably, the replaceable distribution tube 340 is made of plastic, composite material, or metal.

[0051] Fig. 4 shows the interchangeable distribution pipe 340 from Fig. 3 , which has the distribution channel 350 with the converging nozzle 355, which forms the slot-shaped fluid outlet 360 and extends along the longitudinal axis 205 away from the distribution channel 350. For illustrative purposes, the replaceable distribution pipe 340 has a length (L) 430, a height (H) 420 and a width (B) 410.

[0052] Due to the predetermined design of the interchangeable distributor pipe 340 with the slotted fluid outlet 360, the length 430 is greater than the height 420 and also greater than the width 410, i.e., L > H and L > B. Furthermore, a cross-section of the interchangeable distributor pipe 340 formed by the height 420 and the width 410 is smaller than a cross-section formed by the height 420 and the length 430 or by the width 410 and the length 430 respectively, i.e., H * B < H * L and H * B < B * L.

[0053] This results in a required opening cross-section in the mixer body 117 of the Venturi mixer 150 of Fig. 1 bis Fig. 3 to allow lateral insertion or removal, as shown with arrow 399 in Fig. 3 As indicated, it must be the smallest. In particular, this can advantageously allow for the provision of reduced assembly space and access.

[0054] Fig. 5 shows the Venturi mixer 150 from Fig. 1 und Fig. 2 with the mixer body 117, which extends illustratively along the longitudinal axis 205 of Fig. 2 from the inlet end 113 to the outlet end 132, forming the slot-shaped fluid mixing section 118. The slot-shaped fluid mixing section 118 is located at the slot-shaped constriction 250 of the mixer body 117, which is provided in the mixer body 117 along the longitudinal axis 205 between the inlet end 113 and the outlet end 132. The replaceable distributor pipe 340 is located in the mixer body 117. Fig. 3 und Fig 4 arranged, which has the distribution channel 350 with the converging nozzle 355, which forms the slot-shaped fluid outlet 360.

[0055] For illustrative purposes, a first fluid 510, e.g., air, can flow into the mixer body 117 through the inlet end 113, and a second fluid 520, e.g., a gas, in particular a flammable gas such as hydrogen, natural gas, or methane, can flow into the mixer body 117 through the distribution channel 350 and the slotted fluid outlet 360. The first fluid 510 and the second fluid 520 are mixed in the slotted fluid mixing section 118 to produce the fluid mixture 130. Fig. 1 to form.

[0056] The slot-shaped fluid outlet 360 is arranged in the area of ​​the slot-shaped constriction 250 in the mixer body 117. As a result, the mixer body 117 and the replaceable distributor pipe 340 form a fluid guide channel 513 between the inlet end 113 and the slot-shaped constriction 250 for guiding the first fluid 510 along the replaceable distributor pipe 340.

[0057] Fig. 6 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, which extends along the longitudinal axis 205 for illustrative purposes and has the slot-shaped constriction 250. The replaceable distributor pipe 340 is arranged in the mixer body 117, which has the distributor channel 350 with the converging nozzle 355, which forms the slot-shaped fluid outlet 360. The mixer body 117 and the replaceable distributor pipe 340 form the fluid guide channel 513.

[0058] Preferably, the distribution channel 350 has a geometric center of gravity 652 and an associated hydraulic diameter, wherein a distance 658 between the geometric center of gravity 652 and the slot-shaped fluid outlet 360 is at least 80% of the associated hydraulic diameter. The associated hydraulic diameter D is given by: D = 4A / P, where A is the cross-sectional area 656 of the distribution channel 350 perpendicular to the longitudinal axis 205 and P is the inner circumference 654 of the distribution channel 350.

[0059] Furthermore, or alternatively, the distance between the slot-shaped fluid outlet 360 and a smallest opening width 670 of the fluid guide channel 513 is preferably along the longitudinal axis 205 a distance 680 smaller than a smallest opening width 670 of the fluid guide channel 513 or smaller than an opening width 660 of the slot-shaped fluid outlet 360.

[0060] Fig. 7 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, which extends for illustrative purposes along the longitudinal axis 205 and has the slot-shaped constriction 250. The replaceable distributor tube 340 with the slot-shaped fluid outlet 360 is arranged in the mixer body 117. Preferably, in contrast to Fig. 5 The interchangeable distributor pipe 340 can be arranged along the longitudinal axis 205 of the Venturi mixer 150 at at least two different longitudinal positions 700.

[0061] Illustrative shows part (A) of Fig. 7 The interchangeable distributor pipe 340 is displaced in the direction of an arrow 750 along the longitudinal axis 205 from a second longitudinal position 720 (only indicated in the drawing) to a first longitudinal position 710. Similarly, part (B) of Fig. 7 the interchangeable distributor pipe 340, which is moved in the direction of an arrow 770 along the longitudinal axis 205 from the first longitudinal position 710, which is only indicated in the drawing, to the second longitudinal position 720.

[0062] Fig. 8 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, which has the slot-shaped constriction 250. The replaceable distributor tube 340 is arranged in the mixer body 117, which has the converging nozzle 355, which forms the slot-shaped fluid outlet 360. Preferably, in contrast to Fig. 5 The slot-shaped fluid outlet 360 has an adjustable opening width of 660.

[0063] Illustrative shows part (A) of Fig. 8 the slot-shaped fluid outlet 360 with the opening width 660 set as an example to a maximum opening width of 810. In contrast, part (B) of Fig. 8 the slot-shaped fluid outlet 360 with the opening width 660 set as an example to a minimum opening width of 820.

[0064] Fig. 9 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, which has the slot-shaped constriction 250. The replaceable distributor tube 340 is arranged in the mixer body 117, which has the converging nozzle 355, which forms the slot-shaped fluid outlet 360. Preferably, in contrast to Fig. 5 the replaceable distribution pipe 340 along the longitudinal axis 205 of the Venturi mixer 150 according to Fig. 7 can be arranged at least two different longitudinal positions 700 and the slot-shaped fluid outlet 360 has according to Fig. 8 the adjustable opening width is 660.

[0065] Illustrative shows part (A) of Fig. 9 The interchangeable distributor pipe 340 in the second longitudinal position 720 and in the first longitudinal position 710, which is only indicated in the drawing, wherein the set opening width 660 of the slot-shaped fluid outlet 360 in the second longitudinal position corresponds to the maximum opening width 810. Part (B) of Fig. 9 In contrast, the interchangeable distributor pipe 340 shows in the first longitudinal position 710 and in the second, only indicated in the drawing, longitudinal position 720, whereby the set opening width 660 of the slot-shaped fluid outlet 360 in the first longitudinal position corresponds to the minimum opening width 820.

[0066] Fig. 10 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, which has the slot-shaped constriction 250. The replaceable distributor pipe 340 is arranged in the mixer body 117, which has the converging nozzle 355, which forms the slot-shaped fluid outlet 360.

[0067] As opposed to Fig. 5 However, at least one adjustment device 1010 is provided, with which an opening width (660 in Fig. 8 und Fig. 9 The opening width of the slotted fluid outlet (360) is adjustable. For illustrative purposes, at least one adjusting device 1010 is designed as an adjusting screw 1020, with which the opening width of the slotted fluid outlet 360 can be adjusted by deforming the slotted fluid outlet 360. By way of example, the adjusting screw 1020 is screwed into the mixer body 117 and reaches through it to the converging nozzle 355.

[0068] Alternatively or optionally, the adjustment device 1010 can have an electronic actuator, such as a stepper motor. This allows the opening width to be adjusted or dynamically controlled as needed, even during operation of the Venturi mixer 150.

[0069] Fig. 11 shows the interchangeable distribution pipe 340 from Fig. 4 with the distribution channel 350, on which the converging nozzle 355 is arranged, forming the slotted fluid outlet 360. The converging nozzle 355 or the slotted fluid outlet 360 has, for illustrative purposes, a length (L) of 430 of the replaceable distribution pipe 340 or of the distribution channel 350, respectively.

[0070] As opposed to Fig. 4 The slot-shaped fluid outlet 360 is wedge-shaped. For this purpose, the corresponding opening width of the slot-shaped fluid outlet 360 is reduced, for example, from a maximum value of 1110 to a minimum value of 1120.

[0071] Fig. 12 shows the Venturi mixer 150 from Fig. 5 with the mixer body 117, in which the replaceable distributor tube 340 is arranged. The mixer body 117 and the replaceable distributor tube 340 are shown here in a highly simplified manner for the sake of simplicity and clarity of the drawing. The first fluid 510 and the second fluid 520 are supplied to the mixer body 117 in order to mix in the mixer body 117, or in the slot-shaped fluid mixing section 118, respectively. Fig. 5 of the mixer body 117, to be mixed into the fluid mixture 130.

[0072] For illustrative purposes, the mixer body 117 has a lateral opening 1210. Preferably, the replaceable distributor tube 340 is inserted into the mixer body 117 through the lateral opening 1210. An axial end 1202 of the replaceable distributor tube 340, arranged in the mixer body 117, is preferably sealed in a fluid-tight manner.

[0073] Fig. 13 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has the lateral opening 1210 through which the replaceable distributor pipe 340 is inserted into the mixing body 117.

[0074] As opposed to Fig. 12 The axial end 1202 of the replaceable distributor pipe 340, located in the mixer body 117, is shown to be fluid-tightly sealed by a sealing cap 1310. The sealing cap 1310 can be attached to the replaceable distributor pipe 340 by welding, soldering, or gluing.

[0075] Fig. 14 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has the lateral opening 1210 through which the replaceable distributor pipe 340 is inserted into the mixing body 117.

[0076] As opposed to Fig. 12 The axial end 1202 of the replaceable distributor pipe 340, arranged in the mixer body 117, is shown to be fluid-tightly sealed by a sealing plug 1410. The sealing plug 1410 can, for example, be pressed into the replaceable distributor pipe 340. The sealing plug 1410 can, for example, be made of an elastomer, preferably rubber.

[0077] Fig. 15 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has the lateral opening 1210 through which the replaceable distributor pipe 340 is inserted into the mixing body 117.

[0078] As opposed to Fig. 12 The axial end 1202 of the replaceable distributor pipe 340, arranged in the mixer body 117, is shown to be fluid-tightly sealed by the mixer body 117 for illustrative purposes. The axial end 1202 can, for example, be pressed into the mixer body 117.

[0079] Fig. 16 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has a lateral opening 1210 through which the replaceable distributor tube 340 is inserted into the mixing body 117. The axial end 1202 of the replaceable distributor tube 340, located in the mixing body 117, is sealed in a fluid-tight manner.

[0080] As opposed to Fig. 12 A retaining flange 1610 is provided for fixing the replaceable distribution pipe 340 in the mixer body 117. The retaining flange 1610 is preferably attached to the mixer body 117 by means of suitable fastening means 1650. Furthermore, the retaining flange 1610 can be shown to be connected to the feed unit 116. Fig. 1 The second fluid 520 is connected to the other components, illustratively acting as an adapter. Preferably, the retaining flange 1610 is a separate component.

[0081] Fig. 17 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has a lateral opening 1210 through which the replaceable distributor tube 340 is inserted into the mixing body 117. The axial end 1202 of the replaceable distributor tube 340, located in the mixing body 117, is sealed in a fluid-tight manner. Furthermore, the retaining flange 1610 is... Fig. 16 provided for fixing the replaceable distributor pipe 340 in the mixer body 117, wherein the retaining flange 1610 can be connected to the feed unit 116 for feeding the second fluid 520 for illustrative purposes and thereby assumes the function of an adapter.

[0082] As opposed to Fig. 16 The replaceable distributor pipe 340 is connected to the mixer body 117 via an associated seal 1710 for sealing the mixer body 117 in the area of ​​the lateral opening 1210. For this purpose, the associated seal 1710 is arranged in the area of ​​the lateral opening 1210, for illustrative purposes between the mixer body 117 and the retaining flange 1610, and preferably attached to the replaceable distributor pipe 340. The associated seal 1710 can, for example, be made of elastomer, preferably rubber.

[0083] Fig. 18 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixing body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixing body 117 and mixed to form the fluid mixture 130. The mixing body 117 has a lateral opening 1210 through which the replaceable distributor tube 340 is inserted into the mixing body 117. The axial end 1202 of the replaceable distributor tube 340, located in the mixing body 117, is sealed in a fluid-tight manner. Furthermore, the retaining flange 1610 is... Fig. 16 provided for fixing the replaceable distributor pipe 340 in the mixer body 117, wherein the retaining flange 1610 can be connected to the feed unit 116 for feeding the second fluid 520 for illustrative purposes and thereby assumes the function of an adapter.

[0084] As opposed to Fig. 16 The replaceable distributor pipe 340 is connected to the mixer body 117 via an associated seal 1810 for sealing the mixer body 117 in the area of ​​the lateral opening 1210. For this purpose, the associated seal 1810 is arranged in the area of ​​the lateral opening 1210, for illustrative purposes between the mixer body 117 and the retaining flange 1610, and is preferably designed as a separate component. The associated seal 1810 can, for example, be made of elastomer, preferably rubber.

[0085] Fig. 19 shows the Venturi mixer 150 with the mixer body 117, in which the replaceable distributor pipe 340 is located according to Fig. 12 The mixer body 117 is arranged as follows: The first fluid 510 and the second fluid 520 are supplied to the mixer body 117 and mixed to form the fluid mixture 130. The mixer body 117 has a lateral opening 1210 through which the replaceable distributor tube 340 is inserted into the mixer body 117. The axial end 1202 of the replaceable distributor tube 340, located in the mixer body 117, is fluid-tight. Furthermore, the replaceable distributor tube 340 is designed to seal the mixer body 117 in the area of ​​the lateral opening 1210. Fig. 18 connected to the mixer body 117 via the associated seal 1810.

[0086] As opposed to Fig. 12 A retaining flange 1910 is provided for fixing the replaceable distributor pipe 340 in the mixer body 117. The retaining flange 1910 is preferably connected to the replaceable distributor pipe 340 and is particularly preferably designed as an integral component of the replaceable distributor pipe 340. For illustrative purposes, the retaining flange 1910 can be shown with the feed unit 116 of Fig. 1 to supply the second fluid 520, thereby illustratively assuming the function of an adapter.

[0087] Fig. 20 shows the interchangeable distribution pipe 340 from Fig. 4 with the distribution channel 350, on which the converging nozzle 355 is arranged, forming the slot-shaped fluid outlet 360. The replaceable distribution tube 340 is shown here in three different views in parts (A) to (C).

[0088] Part (A) shows the replaceable distribution pipe 340 as an example with the integrated retaining flange 1910 from Fig. 19 A top view of the slotted fluid outlet 360 is shown. The slotted fluid outlet 360 is illustrated here as a rectangular slot.

[0089] Part (B) shows a section through the replaceable distributor pipe 340 of Part (A) along a section line BB. Part (B) illustrates the arrangement of the converging nozzle 355 with the slotted fluid outlet 360 on the distributor channel 350 of the replaceable distributor pipe 340.

[0090] Part (C) is a section through the replaceable distributor pipe 340 of part (B) along a section line CC. Part (C) illustrates machining directions 2010, 2020 for forming the replaceable distributor pipe 340. For example, the replaceable distributor pipe 340 can be manufactured by machining in the machining directions 2010, 2020 or by casting.

[0091] Fig. 21 shows the interchangeable distribution pipe 340 from Fig. 4 with the distribution channel 350, on which the converging nozzle 355 is arranged, forming the slot-shaped fluid outlet 360. The replaceable distribution tube 340 is shown here in three different views in parts (A) to (C).

[0092] Part (A) shows the replaceable distribution pipe 340 as an example with the integrated retaining flange 1910 from Fig. 19 A top view of the slot-shaped fluid outlet 360 is shown. Here, the slot-shaped fluid outlet 360 is illustrated as being formed from a series of point-shaped or circular openings.

[0093] Part (B) shows a section through the replaceable distributor pipe 340 of Part (A) along a section line BB. Part (B) illustrates the arrangement of the converging nozzle 355 with the slotted fluid outlet 360 on the distributor channel 350 of the replaceable distributor pipe 340.

[0094] Part (C) is a section through the replaceable distributor pipe 340 of part (B) along section line CC. Part (C) illustrates machining directions 2010 and 2020 for forming the replaceable distributor pipe 340. For example, the replaceable distributor pipe 340 can be manufactured by machining in the machining directions 2010 and 2020 or by casting. In particular, part (C) illustrates the formation of a plurality of point-shaped or circular openings, of which, for the sake of simplicity, only two openings are individually labelled with reference numerals 362 and 364.

Claims

1. Fluid mixing unit (110) for mixing a first fluid (510) with a second fluid (520) to produce a fluid mixture (130), comprising: a Venturi mixer (150) with a mixer body (117) extending along a longitudinal axis (205) of the Venturi mixer (150) from an inlet end (113) for the first fluid (510) to flow into the mixer body (117) to an outlet end (132) for the fluid mixture (130) to flow out of the mixer body (117), wherein a slot-shaped constriction (250) is provided in the mixer body (117) along the longitudinal axis (205) between the inlet end (113) and the outlet end (132), at which a slot-shaped fluid mixing section (118) for mixing the first fluid (510) is formed with the second fluid (520);and an interchangeable distributor pipe (340) with a distributor channel (350) connected to a slotted fluid outlet (360), wherein the slotted fluid outlet (360) is arranged in the region of the slotted constriction (250) in the mixer body (117), and wherein the interchangeable distributor pipe (340) is detachably attached to the mixer body (117).

2. Fluid mixing unit (110) according to claim 1, wherein the slot-shaped fluid mixing section (118) has a length (222) in a longitudinal direction (225) and a width (232) in a lateral direction (235), wherein the length (222) is at least 1.2 times the width (232).

3. Fluid mixing unit (110) according to claim 1 or 2, wherein the distributor channel (350) has a geometric center of gravity (652) and a hydraulic diameter, and wherein a distance (658) between the geometric center of gravity (652) and the slotted fluid outlet (360) is at least 80% of the hydraulic diameter.

4. Fluid mixing unit (110) according to claim 3, wherein the mixer body (117) forms a fluid guide channel (513) between the inlet end (113) and the slot-shaped constriction (250), and wherein along the longitudinal axis (205) a distance (680) between the slot-shaped fluid outlet (360) and a smallest opening width (670) of the fluid guide channel (513) is smaller than the smallest opening width (670) of the fluid guide channel (513) or smaller than an opening width (660) of the slot-shaped fluid outlet (360).

5. Fluid mixing unit (110) according to one of the preceding claims, wherein a converging nozzle (355) is arranged on the distributor channel (350) which forms the slot-shaped fluid outlet (360).

6. Fluid mixing unit (110) according to one of the preceding claims, wherein the replaceable distributor tube (340) comprises plastic, composite material, or metal.

7. Fluid mixing unit (110) according to one of the preceding claims, wherein the replaceable distributor tube (340) can be arranged along the longitudinal axis (205) of the Venturi mixer (150) at at least two different longitudinal positions (710, 720).

8. Fluid mixing unit (110) according to one of the preceding claims, wherein the slot-shaped fluid outlet (360) has an adjustable opening width (660).

9. Fluid mixing unit (110) according to claim 8, wherein the adjustable opening width (660) is adjustable via at least one adjusting device (1010), in particular an adjusting screw (1020), by deformation of the slot-shaped fluid outlet (360).

10. Fluid mixing unit (110) according to one of the preceding claims, wherein the slot-shaped fluid outlet (360) is rectangular or wedge-shaped.

11. Fluid mixing unit (110) according to one of the preceding claims, wherein at least one axial end (1202) of the replaceable distributor tube (340) arranged in the mixer body (117) is fluid-tightly sealed by the mixer body (117), a sealing cap (1310), or a sealing plug (1410).

12. Fluid mixing unit (110) according to one of the preceding claims, wherein the mixer body (117) has a lateral opening (1210) through which the replaceable distributor tube (340) engages in the mixer body (117).

13. Fluid mixing unit (110) according to claim 12, wherein the replaceable distributor pipe (340) for sealing the mixer body (117) is connected to the mixer body (117) via an associated seal (1710, 1810), wherein the associated seal (1710, 1810) is arranged in the area of ​​the lateral opening (1210).

14. Fluid mixing unit (110) according to one of the preceding claims, wherein a retaining flange (1610, 1910) is provided for fixing the replaceable distributor tube (340) in the mixer body (117).

15. Fluid mixing unit (110) according to one of the preceding claims, wherein the first fluid (510) is air and the second fluid (520) is a flammable gas or the first fluid (510) is a flammable gas and the second fluid (520) is air, and wherein the fluid mixture (130) is a flammable air-gas mixture for an air-gas mixture combustion device (100) with a slotted combustion unit (120).

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