Venturi three-way structure and wall-hanging stove

Abstract

The utility model relates to a Venturi three-way structure and a wall-hanging stove, and relates to the technical field of wall-hanging stove cleaning, the Venturi three-way structure comprises a Venturi body and a detection mechanism, the Venturi body comprises a mixing pipe, a nozzle pipe and an injection pipe, and the injection pipe and the nozzle pipe are both communicated with the mixing pipe; the nozzle pipe is provided with a necking close to the mixing pipe; the injection pipe is arranged close to the necking of the nozzle pipe; the detection mechanism is at least partially arranged in the injection pipe and used for detecting the type of fluid in the injection pipe. The type of the fluid in the injection pipe is detected through the detection mechanism, so that it is determined that the cleaning agent in the cleaning agent tank can enter the mixing pipe section, the situation that the type of the fluid in the injection pipe is water or air is avoided, and the purpose of effectively removing scale in a heating circulating waterway or a domestic water circulating waterway is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of wall-mounted boiler cleaning, and in particular to a Venturi three-way structure and a wall-mounted boiler. Background Art

[0002] A wall-mounted boiler is a heating device that can be used to heat floor heating water for a house and / or domestic water. For example, when the wall-mounted boiler is a dual-purpose device for heating floor heating water for a house and domestic water, it includes a main heat exchanger and a domestic hot water heat exchanger. The main heat exchanger is connected to the heating plate or floor heating coil set in the room through a heating circulation water circuit, which is used to heat the room; the domestic hot water heat exchanger is connected to the bather through a domestic water circulation water circuit, which is used to provide hot water for bathing. The main heat exchanger includes a heat exchanger coil, and the heat generated by the combustion of the combustible gas is transferred to the heat exchanger coil through the outer wall surface of the heat exchanger coil to heat the fluid in the heat exchanger coil. However, the above process also causes a lot of ash scale to accumulate on the outer wall of the heat exchanger coil, which in turn affects the heat transfer to the heat exchanger coil; at the same time, the heating circulation water circuit will also accumulate scale after long-term use, and the presence of the scale also greatly reduces the heat exchange efficiency, resulting in problems such as insufficient heating. The heated heating circulation water flows through the domestic hot water heat exchanger and exchanges heat with the domestic water circulation water of the domestic hot water heat exchanger.

[0003] The existing cleaning methods for the above-mentioned dust scale accumulated on the outer wall of the heat exchanger coil and the scale accumulated in the heating circulation waterway are mostly to use other cleaning equipment to clean the above two. For example, Chinese patent applications CN213968125U and CN108006971A both use additional cleaning equipment to clean the scale accumulated in the heating circulation waterway.

[0004] In addition, the prior art also has a cleaning agent tank disposed in the wall-mounted boiler to facilitate the cleaning of the wall-mounted boiler, such as CN213514465U disclosed in the Chinese patent application.

[0005] The inventor of the present application found that when the existing separate cleaning equipment is used to clean the wall-mounted boiler, it is necessary to introduce other cleaning equipment, so it needs to be operated by professionals and the process is cumbersome. The solution of setting the cleaning agent tank inside the wall-mounted boiler is to use a pump to pump the cleaning agent into the pipe. In this solution, the mixing degree and even the mixing ratio of the cleaning agent and water are not good, which is not conducive to the cleaning of the wall-mounted boiler.

[0006] For cleaning scale in the main heat exchanger and domestic hot water heat exchanger, the utility model patent with patent number CN203177448U discloses a gas wall-mounted boiler. Some pipes and corresponding stop valves are added to the gas wall-mounted boiler so that detergent and water can be injected into the pipes that need to be descaled. When cleaning is required, each stop valve can be controlled manually or automatically, and with the help of the internal circulating water pump of the gas wall-mounted boiler, automatic or semi-automatic control of the cleaning and descaling of the gas wall-mounted boiler can be achieved.

[0007] Although this can achieve the cleaning of scale to a certain extent, the pipeline design is complicated and the problem of cleaning the dust scale on the outer wall of the heat exchanger coil is not solved. Utility Model Content

[0008] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a Venturi three-way structure and a wall-mounted boiler.

[0009] In a first aspect, the present application provides a Venturi three-way structure, comprising:

[0010] The venturi body comprises a mixing tube, a nozzle tube and an ejector tube, wherein the ejector tube and the nozzle tube are both connected to the mixing tube; the nozzle tube has a constriction arranged close to the mixing tube; and the ejector tube is arranged close to the constriction of the nozzle tube;

[0011] The detection mechanism is at least partially disposed in the ejector tube and is used to detect the type of fluid in the ejector tube.

[0012] By adopting the above technical solution, the type of fluid in the ejector pipe is detected by a detection mechanism, thereby determining that the detergent in the detergent tank can enter the mixing pipe section, avoiding the occurrence of the fluid type in the ejector pipe being water or air, so as to achieve the purpose of effectively removing scale from the heating circulation water circuit or the domestic water circulation water circuit.

[0013] According to one embodiment of the present application, the detection mechanism includes a first electrode, a second electrode and a controller;

[0014] The detection end of the first electrode and the detection end of the second electrode are arranged in the ejector tube at intervals; the controller is electrically connected to the first electrode and the second electrode, and is used to determine the conductivity of the fluid in the ejector tube according to the electrical signal of the loop formed by the first electrode and the second electrode.

[0015] By adopting the above technical solution, the conductivity of the liquid between the first electrode and the second electrode is determined to judge the type of liquid between the first electrode and the second electrode, so as to monitor and ensure that the detergent in the detergent tank enters the mixing pipe section, thereby achieving the actual descaling effect.

[0016] According to one embodiment of the present application, the distance between the detection end of the first electrode and the detection end of the second electrode is ≤5 mm;

[0017] And / or, the detection end of the first electrode and the detection end of the second electrode are sequentially arranged along the extension direction of the ejector tube, and the distance between the end of the detection end of the first electrode and the detection end of the second electrode in the ejector tube and the wall surface of the ejector tube is ≤2mm;

[0018] And / or, the distance between the nozzle tube and the first electrode or the second electrode is D, and the distance D satisfies: 10mm≦D≦30mm. By adopting the above technical solution, the distance between the detection end of the first electrode and the detection end of the second electrode is ≤5mm, which is conducive to enhancing the strength and response speed of the detection signal, especially when the type or concentration of the liquid changes slightly, the change in conductivity can be detected more sensitively and quickly by the electrode; H2≤2mm can ensure that even under low flow conditions, the detection ends of the first electrode and the second electrode can effectively contact the flowing liquid, reduce the detection blind area, and ensure the continuity and effectiveness of the detection.

[0019] According to one embodiment of the present application, the mixing tube has a liquid inlet connected to the necking, the cross-sectional area of ​​the necking is defined as A1, and the cross-sectional area of ​​the liquid inlet is defined as A2; the flow rate of the liquid at the necking is defined as V1, and the flow rate of the liquid at the liquid inlet is defined as V2;

[0020] The cross-sectional area A1, the cross-sectional area A2, the flow velocity V1 and the flow velocity V2 satisfy: (A1×V1) / (A2×V2)=1:20.

[0021] By adopting the above technical solution, the cross-sectional area of ​​the necking is limited to A1, the cross-sectional area of ​​the liquid inlet is limited to A2, the flow rate of the liquid at the necking is V1, and the flow rate of the liquid at the liquid inlet is V2 to ensure that the detergent and water are mixed in a ratio of 1:20.

[0022] According to one embodiment of the present application, it further includes: a reminder mechanism;

[0023] The controller is used to send out a reminder signal to remind the user when the signal change value of the liquid type in the ejection tube detected by the detection mechanism is greater than a preset value.

[0024] By adopting the above technical solution, when the conductivity change of the liquid exceeds the preset threshold, the reminder mechanism can promptly notify the user or system operator. This timely feedback can help to promptly discover abnormal conditions in the system, such as insufficient detergent concentration, water in the nozzle pipe section flowing into the ejector pipe section 130, and other problems, so as to take corresponding measures. In the second aspect, the present application provides a wall-mounted boiler, including:

[0025] At least one Venturi body, comprising a mixing tube, a nozzle tube and an ejector tube; the ejector tube and the nozzle tube are both connected to the mixing tube; the nozzle tube has a constriction arranged close to the mixing tube; the ejector tube is arranged close to the constriction of the nozzle tube;

[0026] A heating circulating water circuit, a main heat exchanger and a detergent tank, wherein the heating circulating water circuit is connected to the main heat exchanger via the nozzle pipe and the mixing pipe, and the mixing pipe is connected to the detergent tank;

[0027] And / or, a domestic water circulation circuit, a main heat exchanger and a detergent tank, wherein the main heat exchanger is configured to heat the domestic water circulation circuit, the domestic water circulation circuit is arranged toward the outer wall surface of the main heat exchanger via the nozzle pipe and the mixing pipe, and the mixing pipe is connected to the detergent tank.

[0028] By adopting the above technical solution, the mixing tube of the Venturi body on the domestic water circulation water circuit will spray cleaning agent onto the outer wall of the main heat exchanger to remove scale; the cleaning agent in the mixing tube of the Venturi body on the heating circulation water circuit will enter the main heat exchanger, which can remove the scale accumulated in the main heat exchanger and restore and maintain the heat exchange efficiency of the main heat exchanger.

[0029] According to one embodiment of the present application, it includes:

[0030] Heating circulating water circuit, main heat exchanger, detergent tank, domestic water circulating water circuit, plate heat exchanger; wherein the domestic water circulating water circuit flows through the plate heat exchanger, and the heating circulating water circuit flows through the plate heat exchanger to exchange heat with water in the domestic water circulating water circuit;

[0031] A circulating water pump, wherein the domestic water circulating water circuit is arranged toward the main heat exchanger via the circulating water pump, and the heating circulating water circuit flows through the circulating water pump.

[0032] According to one embodiment of the present application, the circulating water pump is arranged upstream of the Venturi body.

[0033] According to an embodiment of the present application, the domestic water circulation water circuit includes: a first domestic water circuit and a second domestic water circuit; the heating circulation water circuit includes: a first heating water circuit and a second heating water circuit;

[0034] A first three-way control valve is connected between the first domestic water circuit and the first heating water circuit, the first three-way control valve is connected to a second three-way control valve via the circulating water pump, the second three-way control valve is connected to the second domestic water circuit and the second heating water circuit, and the second domestic water circuit and the second heating water circuit are both provided with the Venturi body;

[0035] Wherein, the main heat exchanger includes a heat exchanger coil, and the end of the second domestic water circuit away from the Venturi body extends to the outer wall surface of the heat exchanger coil; the end of the second heating water circuit away from the Venturi body is connected to the heat exchanger coil.

[0036] According to one embodiment of the present application, it further includes: a furnace shell and a mounting shell;

[0037] The heating circulating water circuit, the domestic water circulating water circuit and the circulating water pump are arranged in the furnace shell;

[0038] The installation shell is installed on the outer wall surface of the furnace shell, and the cleaning agent tank is installed in the installation shell.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the Venturi three-way structure provided in the embodiment of the present application;

[0041] Figure 2 It is a structural schematic diagram of the fluid flow in the Venturi three-way structure provided in the embodiment of the present application;

[0042] Figure 3 yes Figure 2 Schematic diagram of the structure of part A;

[0043] Figure 4 This is one of the structural schematic diagrams of the wall-mounted boiler provided in the embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the structure of the domestic water circulation circuit of the wall-mounted boiler provided in the embodiment of the present application when it is working;

[0045] Figure 6 It is a structural schematic diagram of the heating circulation water circuit of the wall-mounted boiler provided in the embodiment of the present application when working;

[0046] Figure 7 This is the second structural schematic diagram of the wall-mounted boiler provided in the embodiment of the present application;

[0047] Figure 8This is the third structural schematic diagram of the wall-mounted boiler provided in the embodiment of the present application.

[0048] Reference numerals:

[0049] 10. Venturi three-way structure;

[0050] 100, Venturi body; 110, mixing tube; 111, liquid inlet; 112, convergence tube section; 113, mixing tube section; 114, expansion tube section; 120, nozzle tube; 121, constriction; 130, ejector tube;

[0051] 200, detection mechanism; 210, first electrode; 220, second electrode;

[0052] 20. Domestic water circulation circuit; 21. First domestic water circuit; 22. Second domestic water circuit; 2a. Main heat exchanger; 3a. Plate heat exchanger;

[0053] 30. Heating circulation water circuit; 31. First heating water circuit; 32. Second heating water circuit; 33. Third heating water circuit; 34. Fourth heating water circuit;

[0054] 41. First three-way control valve; 42. Second three-way control valve;

[0055] 50. Circulating water pump;

[0056] 60. Detergent can;

[0057] 71. Control valve; 72. Three-way valve. DETAILED DESCRIPTION

[0058] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0059] First, in order to facilitate the description of the relative position relationship and setting points of each mechanism in this application, the implementation scenario of the embodiment of this application is explained here.

[0060] The wall-mounted boiler is a heating device that can be used for both heating and bathing, including a main heat exchanger and a domestic hot water heat exchanger. The main heat exchanger is connected to the heating plate or floor heating coil installed in the room through a heating circulation water circuit for heating the room; the domestic hot water heat exchanger is connected to the bather through a domestic water circulation water circuit for supplying water for bathing.

[0061] The main heat exchanger and the domestic hot water heat exchanger will accumulate scale after long-term use, and the presence of the scale will greatly reduce the heat exchange efficiency, resulting in insufficient heating and other problems. In the related art, a venturi tube is arranged in the heating circulation waterway or the domestic water circulation waterway, and the venturi tube includes: an ejector tube section, a nozzle tube section and a mixing tube section, wherein the mixing tube section is connected with the ejector tube section and the nozzle tube section, a detergent tank is installed at the end of the ejector tube section away from the mixing tube section, and the caliber of the nozzle tube section close to the mixing tube section is reduced to press the detergent in the detergent tank from the ejector tube section into the mixing tube section, and then descaled when it is introduced into the main heat exchanger and the domestic hot water heat exchanger through the mixing tube section.

[0062] In the above implementation, there may be at least the following problems:

[0063] 1. If the drainage and pressure relief of the heating circulation water circuit or the domestic water circulation water circuit is insufficient, the pressure in the heating circulation water circuit or the domestic water circulation water circuit will increase, resulting in a small pressure difference between the end of the nozzle section close to the mixing section and the ejection section. At this time, the detergent in the detergent tank may not be enough to be pressed into the mixing section, and even the water in the nozzle section will flow into the ejection section.

[0064] 2. In view of the low frequency of use and the need to reduce costs, the Venturi tube is generally made of plastic. During use, the nozzle section of the Venturi tube is constantly impacted by liquid. After a period of time, the nozzle section of the Venturi tube may be deformed, causing its aperture to become larger. At this time, the detergent in the detergent tank may not be enough to be pressed into the mixing section, and even the water in the nozzle section may flow into the ejector section.

[0065] It can be seen that the above implementation method lacks a monitoring means to monitor and ensure that the detergent in the detergent tank enters the mixing pipe section to achieve the actual descaling effect.

[0066] Reference below Figure 1-Figure 8 The venturi three-way structure and the wall-mounted boiler according to the embodiments of the present application are described.

[0067] like Figure 1 and Figure 2 As shown, the Venturi three-way structure 10 includes: a Venturi body 100 and a detection mechanism 200 .

[0068] The venturi body 100 includes a mixing tube 110 , a nozzle tube 120 and an ejector tube 130 .

[0069] The nozzle pipe 120 is used to communicate with the water pipe, and the nozzle pipe 120 has a constriction 121 arranged close to the mixing pipe 110 .

[0070] The ejection tube 130 is disposed close to the constricted opening 121 of the nozzle tube 120 , and one end of the ejection tube 130 away from the constricted opening 121 of the nozzle tube 120 is used to install the detergent tank 60 , and the detergent tank 60 contains detergent.

[0071] The mixing tube 110 is communicated with the ejector tube 130 and the nozzle tube 120 .

[0072] It should be noted that the cross-sectional area of ​​the nozzle tube 120 decreases in the direction of the constriction 121 close to the nozzle tube 120. Based on the Bernoulli principle, when the water in the water pipe flows through the constriction 121 of the nozzle tube 120, the flow rate increases and the pressure decreases. Therefore, the detergent in the detergent tank 60 will be pressed into the mixing tube 110 through the ejector tube 130 and mixed with the water flowing through the mixing tube 110.

[0073] The detection mechanism 200 is at least partially disposed in the ejector tube 130 and is used to detect the type of fluid in the ejector tube 130 .

[0074] In actual implementation, the detection mechanism 200 may be an ultrasonic detection mechanism, which distinguishes different fluids based on the propagation speed and attenuation characteristics of ultrasonic waves in the fluid, thereby inferring the fluid type.

[0075] The detection mechanism 200 may also be an infrared detection mechanism, which uses the difference in absorption or reflection of infrared light of a specific wavelength by different fluids to identify the fluid type.

[0076] The fluid type may refer to the type of fluid, such as water, cleaning agent, gas, etc.; it may also refer to the concentration change of a certain component of the fluid.

[0077] The cleaning agent may be a cleaning agent of a certain concentration, and the effective cleaning component content of the cleaning agent is between seventy percent and eighty percent. For example, after the cleaning agent is mixed with water, the effective cleaning component content of the cleaning agent is seventy-five percent. When the effective cleaning component content of the cleaning agent is less than seventy percent, it can be considered that the concentration of the effective cleaning component content of the cleaning agent has a large change, and is thus detected by the detection mechanism 200.

[0078] In actual implementation, the cleaning agent may be phosphoric acid, which is used to clean scale in the pipeline, and the cleaning agent may also be sodium carbonate or sodium hydroxide, which is used to clean scale on the wall of the main heat exchanger.

[0079] For example, the following three situations may occur during the implementation of this application:

[0080] Case 1: The fluid type in the ejector tube 130 is a detergent, which flows out from the detergent tank 60 , is pressed into the mixing tube 110 through the ejector tube 130 , and is mixed with the water flowing through the mixing tube 110 .

[0081] Case 2: the fluid type in the ejector pipe 130 is water. Due to insufficient drainage and pressure relief in the heating circulation water circuit or the domestic water circulation water circuit, the water in the nozzle pipe section 120 will flow into the ejector pipe section 130 .

[0082] Case 3: The fluid type in the ejector tube 130 is air. Since the detergent in the detergent tank 60 is used up, air will flow through the ejector tube 130 .

[0083] The present application detects the type of fluid in the ejector tube 130 through the detection mechanism 200, thereby determining that the detergent in the detergent tank 60 can enter the mixing tube section 110, avoiding the occurrence of the fluid type in the ejector tube 130 being water or air, so as to achieve the purpose of effectively removing scale from the heating circulation water circuit or the domestic water circulation water circuit.

[0084] like Figure 1-Figure 3 As shown, in some embodiments, the detection mechanism 200 includes a first electrode 210, a second electrode 220, and a controller.

[0085] The first electrode 210 and the second electrode 220 are disposed in the ejector tube 130 . The first electrode 210 and the second electrode 220 include but are not limited to stainless steel or platinum (Pt).

[0086] The controller is electrically connected to the first electrode 210 and the second electrode 220 , and is used to determine the conductivity of the liquid in the ejector tube 130 according to the electrical signal (voltage / current) between the first electrode 210 and the second electrode 220 .

[0087] In practical implementation, the controller may include, for example, a nanovoltmeter and / or a nanoampere meter having a Wheatstone bridge or amplifier circuit.

[0088] It should be noted that when the liquid in the ejector tube 130 flows through the first electrode 210 and the second electrode 220 , the first electrode 210 and the second electrode 220 are connected, that is, an electrical signal is formed between the first electrode 210 and the second electrode 220 .

[0089] Thereafter, the controller may analyze the electrical signal to determine the conductivity of the liquid.

[0090] The following two situations may occur during the implementation of this application:

[0091] In case 1, the detergent in the detergent tank 60 is pressed into the mixing tube 110 through the ejector tube 130 and mixed with the water flowing through the mixing tube 110. That is, the liquid between the first electrode 210 and the second electrode 220 is the detergent, and the conductivity determined by the controller is C1.

[0092] Case 2: Due to insufficient drainage and pressure relief of the heating circulation water circuit or the domestic water circulation water circuit, the water in the nozzle pipe 120 will flow into the ejector pipe 130. That is, the liquid between the first electrode 210 and the second electrode 220 is water, and the conductivity determined by the controller is C2.

[0093] By determining the conductivity of the liquid between the first electrode 210 and the second electrode 220, the type of liquid between the first electrode 210 and the second electrode 220 is determined, so as to monitor and ensure that the detergent in the detergent tank 60 enters the mixing tube 110 section, thereby achieving the actual descaling effect.

[0094] Of course, it is also possible that the detergent in the detergent tank 60 is used up, there is no liquid between the first electrode 210 and the second electrode 220, and the first electrode 210 and the second electrode 220 are disconnected, which is not limited in this embodiment.

[0095] In this embodiment, the conductivity of the liquid between the first electrode 210 and the second electrode 220 is determined to determine the type of liquid between the first electrode 210 and the second electrode 220, so as to monitor and ensure that the detergent in the detergent tank 60 enters the mixing tube 110 section, thereby achieving the actual descaling effect.

[0096] like Figure 3 As shown, in some embodiments, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is H1, and H1≤5mm.

[0097] The detection end of the first electrode 210 may be the portion of the first electrode 210 that is in the ejector tube and protrudes from the wall of the ejector tube; the detection end of the second electrode 220 may be the portion of the second electrode 220 that is in the ejector tube and protrudes from the wall of the ejector tube.

[0098] It should be noted that the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 mainly depends on the conductivity of the liquid and the detection accuracy.

[0099] For liquids with good conductivity, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 can be relatively large, because even if the distance is slightly larger, the liquid can still form a sufficient conductive path.

[0100] If higher detection accuracy is required, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 should be smaller, because this can more accurately detect the presence and concentration of the liquid.

[0101] In this embodiment, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is ≤5 mm, which is beneficial to enhancing the strength and response speed of the detection signal, especially when there is a slight change in the type or concentration of the liquid, the change in conductivity can be detected more sensitively and quickly.

[0102] like Figure 3 As shown, in some embodiments, the detection end of the first electrode 210 and the detection end of the second electrode 220 are sequentially arranged along the extension direction of the ejector tube 130 .

[0103] The distance between the ends of the detection ends of the first electrode 210 and the second electrode 220 located in the ejector tube 130 and the wall surface of the ejector tube 130 is H2, and H2≤2 mm.

[0104] The wall surface of the ejector tube 130 may be the opposite wall surface of the ejector tube 130 through which the first electrode 210 and the second electrode 220 pass.

[0105] It should be noted that when the liquid flow rate is small, it will flow along the wall, so the distance H2 between the detection end of the first electrode 210 and the detection end of the second electrode 220 and the wall of the ejector tube 130 is ≤2mm, otherwise they may not contact the liquid, affecting the detection accuracy.

[0106] In this embodiment, H2≤2 mm can ensure that even under low flow conditions, the detection ends of the first electrode 210 and the second electrode 220 can effectively contact the flowing liquid, reduce the detection blind area, and ensure the continuity and effectiveness of the detection.

[0107] In actual implementation, the number of the first electrode 210 and the second electrode 220 can be one group, or multiple groups. For example, when the number of the first electrode 210 and the second electrode 220 is multiple groups, the multiple groups of first electrodes 210 and the second electrodes 220 are arranged at different positions of the ejector tube 130 and can be read at the same time, and then the group with a larger current value is selected to improve the sensitivity of detecting liquid.

[0108] like Figure 3 As shown, in some embodiments, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is H1, and H1≤5mm; the detection end of the first electrode 210 and the detection end of the second electrode 220 are arranged in sequence along the extension direction of the ejector tube 130, and the distance between the end of the detection end of the first electrode 210 and the detection end of the second electrode 220 in the ejector tube 130 and the wall of the ejector tube 130 is H2, and H2≤2mm.

[0109] In this embodiment, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is ≤5mm, which is beneficial to enhancing the strength and response speed of the detection signal, especially when there is a slight change in the type or concentration of the liquid, the change in conductivity can be more sensitively and quickly detected by the electrode; H2≤2mm can ensure that even under low flow conditions, the detection ends of the first electrode 210 and the second electrode 220 can effectively contact the flowing liquid, reduce the detection blind area, and ensure the continuity and effectiveness of the detection.

[0110] like Figure 3 As shown, in some embodiments, the distance between the nozzle tube 120 and the first electrode 210 or the second electrode 220 is D, and the distance D satisfies: 10 mm≦D≦30 mm.

[0111] It should be noted that if the distance D is less than 10 mm, the stability of the detection signals of the first electrode 210 and the second electrode 220 may be disturbed due to the high flow velocity and possible turbulence near the nozzle tube 120 .

[0112] If D is greater than 30 mm, the detection response may be delayed, especially when the fluid dynamics change rapidly, the response of the first electrode 210 and the second electrode 220 may lag behind the actual fluid dynamics change.

[0113] like Figure 3 As shown, in some embodiments, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is H1, and H1≤5mm; the detection end of the first electrode 210 and the detection end of the second electrode 220 are arranged in sequence along the extension direction of the ejector tube 130, and the distance between the end of the detection end of the first electrode 210 and the detection end of the second electrode 220 in the ejector tube 130 and the wall of the ejector tube 130 is H2, and H2≤2mm; the distance between the nozzle tube 120 and the first electrode 210 or the second electrode 220 is D, and the distance D satisfies: 10mm≦D≦30mm.

[0114] In this embodiment, the distance between the detection end of the first electrode 210 and the detection end of the second electrode 220 is ≤5mm, which is beneficial to enhancing the strength and response speed of the detection signal, especially when there is a slight change in the type or concentration of the liquid, the change in conductivity can be more sensitively and quickly detected by the electrode; H2≤2mm can ensure that even under low flow conditions, the detection ends of the first electrode 210 and the second electrode 220 can effectively contact the flowing liquid, reduce the detection blind area, and ensure the continuity and effectiveness of the detection; the distance D satisfies: 10mm≦D≦30mm, which can ensure the stability of the detection signal and the timely detection response.

[0115] In some embodiments, the mixing tube 110 has a liquid inlet 111 connected to the constriction 121, the cross-sectional area of ​​the constriction 121 is defined as A1, and the cross-sectional area of ​​the liquid inlet 111 is defined as A2; the flow rate of the liquid at the constriction 121 is defined as V1, and the flow rate of the liquid at the liquid inlet 111 is defined as V2;

[0116] Among them, the cross-sectional area A1, the cross-sectional area A2, the flow velocity V1 and the flow velocity V2 satisfy: (A1×V1) / (A2×V2)=1:20.

[0117] In this embodiment, the cross-sectional area A1 of the constriction 121, the cross-sectional area A2 of the liquid inlet 111, the flow rate V1 of the liquid at the constriction 121 and the flow rate V2 of the liquid at the liquid inlet 111 are limited to ensure that the detergent and water are mixed at a ratio of 1:20.

[0118] In some embodiments, the Venturi three-way structure further includes: a reminder mechanism.

[0119] The controller is used to send out a reminder signal to remind the user when the signal change value of the liquid type in the ejector tube 130 detected by the detection mechanism 200 is greater than a preset value.

[0120] In this embodiment, when the conductivity of the liquid changes beyond a preset threshold, the reminder mechanism can promptly notify the user or system operator. This timely feedback can help to promptly detect abnormal conditions in the system, such as insufficient detergent concentration, water in the nozzle tube 120 flowing into the ejector tube 130, and other problems, so that corresponding measures can be taken.

[0121] like Figure 1 and Figure 2 As shown, in some embodiments, the mixing tube 110 has a liquid inlet 111 connected to the ejector tube 130 and the constriction 121 , the diameter of the liquid inlet 111 is larger than the diameter of the constriction 121 , and the liquid inlet 111 is directly opposite to the constriction 121 .

[0122] In this embodiment, the design that the diameter of the liquid inlet 111 is larger than the constriction 121 allows the fluid (water and detergent) flowing into the mixing tube 110 through the constriction 121 to be more widely distributed in the mixing tube 110. This helps to increase the contact area between the fluids and promote more thorough and uniform mixing.

[0123] like Figure 1 and Figure 2 As shown, in some embodiments, one end of the nozzle pipe 120 close to the necking 121 is fixedly connected with a reinforcing block, and the one end of the nozzle pipe 120 close to the necking 121 is connected to the wall surface of the mixing tube 110 through the reinforcing block.

[0124] In this embodiment, a reinforcing block is installed at one end of the nozzle tube 120 close to the constricted opening 121 , so as to prevent the constricted opening 121 of the nozzle tube 120 from being damaged due to long-term fluid impact.

[0125] like Figure 1 and Figure 2 As shown, in some embodiments, the mixing tube 110 includes: a convergent tube section 112 and a mixing tube 110 section.

[0126] The convergent pipe section 112 is connected to the mixing pipe section 110 , and the liquid inlet 111 is arranged at one end of the convergent pipe section 112 away from the mixing pipe section 110 . The inner diameter of the convergent pipe section 112 decreases towards the mixing pipe section 110 .

[0127] In this embodiment, on the one hand, the velocity of the fluid (water and detergent) will increase and the pressure will decrease when passing through the convergent pipe section 112, which helps to improve the fluid injection efficiency from the injection pipe 130 to the mixing pipe 110; on the other hand, it also helps to mix the water and detergent more effectively and improve the mixing uniformity.

[0128] like Figure 1 and Figure 2 As shown, in some embodiments, the mixing tube 110 further includes: a beam expanding tube section 114 .

[0129] The mixing tube section 110 is connected to the expansion tube section 114 , and the inner diameter of the expansion tube section 114 increases in a direction away from the mixing tube section 110 .

[0130] In this embodiment, the inner diameter of the expansion tube section 114 is expanded in the direction away from the mixing tube section 110, which helps to slow down the fluid velocity and increase the fluid pressure. According to Bernoulli's principle, when the fluid flows through the expanded part of the pipeline, its velocity will decrease and the pressure will increase, which can stabilize the fluid flow.

[0131] like Figure 4-Figure 8 As shown, the present application also proposes a wall-mounted boiler.

[0132] like Figure 4 As shown, the wall-mounted boiler includes: at least one Venturi body 100.

[0133] The venturi body 100 includes a mixing tube 110 , a nozzle tube 120 and an ejector tube 130 .

[0134] The ejector tube 130 and the nozzle tube 120 are both connected to the mixing tube 110 ; the nozzle tube 120 has a constricted opening 121 disposed close to the mixing tube 110 ; and the ejector tube 130 is disposed close to the constricted opening 121 of the nozzle tube 120 .

[0135] Among them, the wall-mounted boiler can be at least one of the following structural forms:

[0136] First, the wall-mounted boiler also includes: a heating circulation water circuit 30, a main heat exchanger 2a and a detergent tank 60.

[0137] The heating circulation water path 30 is connected to the main heat exchanger 2 a via the nozzle pipe 120 and the mixing pipe 110 , and the mixing pipe 110 is connected to the detergent tank 60 .

[0138] In this embodiment, the detergent in the detergent tank 60 enters the mixing tube 110 through the ejector tube 130 and then enters the main heat exchanger 2a from the mixing tube 110, which can remove the scale accumulated in the main heat exchanger 2a and restore and maintain the heat exchange efficiency of the main heat exchanger 2a.

[0139] Secondly, the wall-mounted boiler also includes: a domestic water circulation circuit 20, a main heat exchanger 2a and a detergent tank 60.

[0140] The main heat exchanger 2 a is configured to heat a domestic water circulation channel 20 . The domestic water circulation channel 20 is disposed toward the outer wall surface of the main heat exchanger 2 a via a nozzle pipe 120 and a mixing pipe 110 , and the mixing pipe 110 is connected to a detergent tank 60 .

[0141] It should be noted that the main heat exchanger 2a includes a heat exchanger coil. The heat generated by the combustion of the combustible gas is conducted into the heat exchanger coil through the outer wall of the heat exchanger coil, thereby heating the fluid in the heat exchanger coil. However, the above process also causes a lot of ash and scale to accumulate on the outer wall of the heat exchanger coil. These ash and scale will affect the heat conduction into the heat exchanger coil and affect the heat conduction efficiency.

[0142] In this embodiment, the detergent in the detergent tank 60 enters the mixing tube 110 through the ejector tube 130 and is then sprayed from the mixing tube 110 toward the outer wall of the main heat exchanger to remove dirt, thereby improving heat transfer efficiency.

[0143] Third, the wall-mounted boiler also includes: a domestic water circulation circuit 20, a heating circulation circuit 30, a main heat exchanger 2a and a detergent tank 60.

[0144] The main heat exchanger 2 a is configured to heat a domestic water circulation channel 20 . The domestic water circulation channel 20 is disposed toward the outer wall surface of the main heat exchanger 2 a via a nozzle pipe 120 and a mixing pipe 110 , and the mixing pipe 110 is connected to a detergent tank 60 .

[0145] The heating circulation water path 30 is connected to the main heat exchanger 2 a via the nozzle pipe 120 and the mixing pipe 110 , and the mixing pipe 110 is connected to the detergent tank 60 .

[0146] In this embodiment, the mixing tube 110 of the Venturi body 100 on the domestic water circulation water circuit 20 will spray cleaning agent onto the outer wall of the main heat exchanger to remove scale; the cleaning agent in the mixing tube 110 of the Venturi body 100 on the heating circulation water circuit 30 will enter the main heat exchanger 2a, which can remove the scale accumulated in the main heat exchanger 2a and restore and maintain the heat exchange efficiency of the main heat exchanger 2a.

[0147] like Figure 4-Figure 6 As shown, in some embodiments, the wall-mounted boiler includes: at least one venturi body 100, a domestic water circulation circuit 20, a heating circulation circuit 30, a main heat exchanger 2a, a detergent tank 60, a plate heat exchanger 3a and a circulating water pump 50.

[0148] The venturi body 100 includes a mixing tube 110 , a nozzle tube 120 and an ejector tube 130 .

[0149] The ejector tube 130 and the nozzle tube 120 are both connected to the mixing tube 110 ; the nozzle tube 120 has a constricted opening 121 disposed close to the mixing tube 110 ; and the ejector tube 130 is disposed close to the constricted opening 121 of the nozzle tube 120 .

[0150] The main heat exchanger 2 a is configured to heat a domestic water circulation channel 20 . The domestic water circulation channel 20 is disposed toward the outer wall surface of the main heat exchanger 2 a via a nozzle pipe 120 and a mixing pipe 110 , and the mixing pipe 110 is connected to a detergent tank 60 .

[0151] The heating circulation water path 30 is connected to the main heat exchanger 2 a via the nozzle pipe 120 and the mixing pipe 110 , and the mixing pipe 110 is connected to the detergent tank 60 .

[0152] The domestic water circulation water path 20 flows through the plate heat exchanger 3 a , and the heating circulation water path 30 flows through the plate heat exchanger 3 a to exchange heat with the water in the domestic water circulation water path 20 .

[0153] The domestic water circulation water path 20 is provided toward the main heat exchanger 2 a via a circulation water pump 50 , and the heating circulation water path 30 flows through the circulation water pump 50 .

[0154] In this embodiment, the circulating water pump 50 can selectively apply pressure to the domestic water circulating water circuit 20 or the heating circulating water circuit 30 to ensure that it quickly reaches the required temperature and pressure when heating or providing domestic hot water.

[0155] like Figure 4-Figure 6 As shown, in some embodiments, the circulating water pump 50 is disposed upstream of the venturi body 100 .

[0156] It should be noted that the liquid flows into the nozzle tube 120 of the Venturi body 100 from the upstream of the Venturi body 100 , and the liquid flows out from the mixing tube 110 of the Venturi body 100 to the downstream of the Venturi body 100 .

[0157] In the related art, the circulating water pump 50 is usually arranged downstream of the Venturi body 100. This design makes it difficult for the circulating water pump 50 to affect the water pressure of the nozzle tube 120 of the Venturi body 100. On the other hand, the circulating water pump 50 will also be corroded by the cleaning agent flowing out of the mixing tube 110 of the Venturi body 100.

[0158] In the present embodiment, the circulating water pump 50 is arranged upstream of the Venturi body 100. On the one hand, it can pressurize the nozzle tube 120 of the Venturi body 100, and the pressure difference generated by the nozzle tube causes the ejector tube 130 to inhale more cleaning agent. On the other hand, it reduces the direct contact of the circulating water pump 50 with the cleaning agent, thereby reducing the risk of corrosion and extending the service life.

[0159] like Figure 5 and Figure 6 As shown, in some embodiments, the domestic water circulation water circuit 20 includes: a first domestic water circuit 21 and a second domestic water circuit 22 ; the heating circulation water circuit 30 includes: a first heating water circuit 31 and a second heating water circuit 32 .

[0160] A first three-way control valve 41 is connected between the first domestic water circuit 21 and the first heating water circuit 31. The first three-way control valve 41 is connected to a second three-way control valve 42 via a circulating water pump 50. The second three-way control valve 42 is connected to the second domestic water circuit 22 and the second heating water circuit 32. A Venturi body 100 is provided on the second domestic water circuit 22 and the second heating water circuit 32.

[0161] Among them, the main heat exchanger 2a includes a heat exchanger coil, and the end of the second domestic water channel 22 away from the Venturi body 100 extends to the outer wall of the heat exchanger coil; the end of the second heating water channel 32 away from the Venturi body 100 is connected to the heat exchanger coil.

[0162] like Figure 5 As shown, regarding the domestic water circulation water circuit 20:

[0163] Starting from the water source, water flows from the first domestic water circuit 21 through the first three-way control valve 41. The first three-way control valve 41 controls the water flow through the circulating water pump 50 to control the water flow to the second three-way control valve 42, and then sprays from the second domestic water circuit 22 to the outer wall of the heat exchanger coil of the main heat exchanger 2a, or flows from the second domestic water circuit 22 to the point of use of domestic water, such as a hot water faucet or shower.

[0164] In actual implementation, a control valve can be installed on the second domestic water circuit 22 of the domestic water circulation circuit 20, and the control valve can be installed upstream of the Venturi body 100, so that the control valve 71 can be controlled to disconnect when the outer wall surface of the heat exchanger coil of the main heat exchanger 2a does not need to be sprayed.

[0165] The control valve 71 includes but is not limited to a solenoid valve.

[0166] like Figure 6 As shown, regarding the heating circulation water circuit 30:

[0167] Starting from the water source, water flows from the first heating water circuit 31 through the first three-way control valve 41. The first three-way control valve 41 controls the water flow through the circulating water pump 50 to control the water flow to the second three-way control valve 42, and then flows from the second heating water circuit 32 through the heat exchanger coil of the main heat exchanger 2a.

[0168] In actual implementation, the heating circulation water circuit 30 also includes: a third heating water circuit 33 and a fourth heating water circuit 34 .

[0169] The third heating water path 33 and the fourth heating water path 34 can be connected to the second heating water path 32 via the three-way valve 72 .

[0170] The third heating water path 33 flows through the plate heat exchanger 3a to exchange heat with the water in the second domestic water path 22, and the fourth heating water path 34 is connected to the heating plate or floor heating coil for heating the room.

[0171] like Figure 7 and Figure 8 As shown, in some embodiments, the wall-mounted boiler further includes: a boiler shell and a mounting shell.

[0172] A heating circulating water circuit 30 and a domestic water circulating water circuit 20 are provided in the furnace shell.

[0173] The installation shell is installed on the outer wall surface of the furnace shell, and a cleaning agent tank 60 is installed in the installation shell.

[0174] In this embodiment, the detergent tank 60 is placed in an independent installation shell to reduce potential damage caused by corrosion or leakage of the detergent, and also to facilitate regular inspection and replacement of the detergent tank 60 .

[0175] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A Venturi three-way structure, characterized in that: include: A venturi body (100) comprises a mixing tube (110), a nozzle tube (120) and an ejector tube (130); the ejector tube (130) and the nozzle tube (120) are both connected to the mixing tube (110); the nozzle tube (120) has a constriction (121) arranged close to the mixing tube (110); the ejector tube (130) is arranged close to the constriction (121) of the nozzle tube (120); The detection mechanism (200) is at least partially disposed in the ejector tube (130) and is used to detect the type of fluid in the ejector tube (130).

2. The Venturi three-way structure according to claim 1, characterized in that: The detection mechanism (200) comprises a first electrode (210), a second electrode (220) and a controller; The detection end of the first electrode (210) and the detection end of the second electrode (220) are arranged in the ejector tube (130) at intervals; the controller is electrically connected to the first electrode (210) and the second electrode (220) and is used to determine the conductivity of the fluid in the ejector tube (130) based on the electrical signal of the loop formed by the first electrode (210) and the second electrode (220).

3. The Venturi three-way structure according to claim 2, characterized in that: The distance between the detection end of the first electrode (210) and the detection end of the second electrode (220) is ≤5 mm; and / or, the detection end of the first electrode (210) and the detection end of the second electrode (220) are arranged in sequence along the extension direction of the ejector tube (130), and the distance between the ends of the detection end of the first electrode (210) and the detection end of the second electrode (220) located inside the ejector tube (130) and the wall surface of the ejector tube (130) is ≤ 2 mm; And / or, the distance between the nozzle tube (120) and the first electrode (210) or the second electrode (220) is D, and the distance D satisfies: 10 mm≦D≦30 mm.

4. The Venturi three-way structure according to claim 2, characterized in that: The mixing tube (110) has a liquid inlet (111) connected to the constriction (121); the cross-sectional area of ​​the constriction (121) is defined as A1, and the cross-sectional area of ​​the liquid inlet (111) is defined as A2; the flow rate of the liquid at the constriction (121) is defined as V1, and the flow rate of the liquid at the liquid inlet (111) is defined as V2; The cross-sectional area A1, the cross-sectional area A2, the flow velocity V1 and the flow velocity V2 satisfy: (A1×V1) / (A2×V2)=1:

20.

5. The Venturi three-way structure according to any one of claims 2 to 4, characterized in that: Also includes: Alert institutions; The controller is used to send out a reminder signal to remind a user when the detection mechanism (200) detects that the signal change value of the liquid type in the ejector tube (130) is greater than a preset value.

6. A wall-mounted boiler, characterized in that: include: At least one venturi body (100) comprises a mixing tube (110), a nozzle tube (120) and an ejector tube (130); the ejector tube (130) and the nozzle tube (120) are both connected to the mixing tube (110); the nozzle tube (120) has a constriction (121) arranged close to the mixing tube (110); the ejector tube (130) is arranged close to the constriction (121) of the nozzle tube (120); A heating circulating water circuit (30), a main heat exchanger (2a), and a detergent tank (60), wherein the heating circulating water circuit (30) is connected to the main heat exchanger (2a) via the nozzle pipe (120) and the mixing pipe (110), and the mixing pipe (110) is connected to the detergent tank (60); And / or, a domestic water circulation circuit (20), a main heat exchanger (2a) and a detergent tank (60), wherein the main heat exchanger (2a) is configured to heat the domestic water circulation circuit (20), the domestic water circulation circuit (20) is arranged toward the outer wall surface of the main heat exchanger (2a) via the nozzle pipe (120) and the mixing pipe (110), and the mixing pipe (110) is connected to the detergent tank (60).

7. The wall-mounted boiler according to claim 6, characterized in that: include: A heating circulating water circuit (30), a main heat exchanger (2a), a detergent tank (60), a domestic water circulating water circuit (20), and a plate heat exchanger (3a); wherein the domestic water circulating water circuit (20) flows through the plate heat exchanger (3a), and the heating circulating water circuit (30) flows through the plate heat exchanger (3a) to perform heat exchange on water in the domestic water circulating water circuit (20); A circulating water pump (50), wherein the domestic water circulating water circuit (20) is arranged toward the main heat exchanger (2a) via the circulating water pump (50), and the heating circulating water circuit (30) flows through the circulating water pump (50).

8. The wall-mounted boiler according to claim 7, characterized in that: The circulating water pump (50) is arranged upstream of the Venturi body (100).

9. The wall-mounted boiler according to claim 7, characterized in that: The domestic water circulation water circuit (20) comprises: a first domestic water circuit (21) and a second domestic water circuit (22); the heating circulation water circuit (30) comprises: a first heating water circuit (31) and a second heating water circuit (32); A first three-way control valve (41) is connected between the first domestic water circuit (21) and the first heating water circuit (31); the first three-way control valve (41) is connected to a second three-way control valve (42) via the circulating water pump (50); the second three-way control valve (42) is connected to the second domestic water circuit (22) and the second heating water circuit (32); the second domestic water circuit (22) and the second heating water circuit (32) are both provided with the Venturi body (100); The main heat exchanger (2a) comprises a heat exchanger coil, and the end of the second domestic water circuit (22) away from the Venturi body (100) extends to the outer wall surface of the heat exchanger coil; the end of the second heating water circuit (32) away from the Venturi body (100) is connected to the heat exchanger coil.

10. The wall-mounted boiler according to claim 6, characterized in that: Also includes: Furnace housing and mounting shell; The heating circulating water circuit (30) and the domestic water circulating water circuit (20) are arranged in the furnace shell; the installation shell is installed on the outer wall surface of the furnace shell, and the detergent tank (60) is installed in the installation shell.

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