Inner leakage detection device for heat exchanger of gas water heater

Abstract

The utility model provides a gas water heater heat exchanger inner leakage detection device which comprises a water heater body and a heat exchanger body, the heat exchanger body is installed in the water heater body, and a first water inlet pipe at the bottom of the water heater body is connected with a second water inlet pipe of the heat exchanger body through a connecting pipe. A pressure sensor is arranged on the second water inlet pipe, a control assembly is arranged on one side of the water heater body, a gas sensor is further arranged on the control assembly, a through groove is formed in the water heater body, and the gas sensor is located at one end of the through groove. The detection device can sense the pressure change during water inflow through the pressure sensor installed on the second water inlet pipe, so that the inner leakage condition is detected, and once inner leakage occurs, the slight change of the pressure can be captured, and continuous deterioration of the inner leakage is avoided; and meanwhile, the gas sensor is arranged on the control assembly, whether abnormal conditions such as natural gas leakage exist in the water heater or not can be monitored, double guarantees are formed, and the use safety of the gas water heater is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to detection device technical field, more specifically, it is especially related to a gas water heater heat exchanger internal leakage detection device. BACKGROUND

[0002] The heat exchanger is prone to damage under the action of thermal stress and corrosion for a long time, thereby causing internal leakage of the heat exchanger; the internal leakage of the heat exchanger not only reduces the heat exchange efficiency of the heat exchanger, but also reduces the heating effect of the gas water heater, so it is necessary to detect the internal leakage of the heat exchanger and handle it in time; however, the traditional internal leakage detection often relies on manual detection of appearance or simple function test, when internal leakage occurs, it is difficult to find the tiny leakage point of the internal structure, and it is impossible to handle it in time, resulting in continuous deterioration of the internal leakage; and the user continues to use the gas water heater without knowing, which is easy to cause the occurrence of safety hazards such as gas leakage or carbon monoxide poisoning. UTILITY MODEL CONTENTS

[0003] In order to solve the above technical problems, the utility model provides a gas water heater heat exchanger internal leakage detection device to solve the technical problems that the traditional internal leakage detection cannot find the internal leakage of the heat exchanger in time, resulting in continuous deterioration of the internal leakage, and the continuous use of the gas water heater is easy to cause the occurrence of safety hazards.

[0004] The purpose and function of the gas water heater heat exchanger internal leakage detection device of the utility model are achieved by the following specific technical means:

[0005] A gas water heater heat exchanger internal leakage detection device, comprising a water heater body and a heat exchanger body, the heat exchanger body is installed in the water heater body, the water heater body is provided with a first water inlet pipe at the bottom, the heat exchanger body is provided with a second water inlet pipe at the bottom, the first water inlet pipe is connected with the second water inlet pipe through a connecting pipe, the second water inlet pipe is provided with a pressure sensor, one side of the water heater body is provided with a control assembly, the control assembly is further provided with a gas sensor, a through slot is formed in the water heater body, and the gas sensor is located at one end of the through slot.

[0006] According to a preferred embodiment, the control assembly comprises a control box and a processing module, a control cover plate is connected with the control box to form a control cavity, the processing module is installed in the control cavity, the control cover plate is provided with a control panel, and the control panel is connected with the processing module through connecting wires.

[0007] According to one preferred embodiment, the control box top is provided with an alarm lamp, one side of the alarm lamp is further provided with a buzzer, the control box is provided with a mounting groove, the gas sensor is clamped in the mounting groove, the mounting groove opening surface is further provided with a protective cover, and a plurality of groups of ventilation grooves are formed in the protective cover.

[0008] According to one preferred embodiment, the water heater body bottom is provided with a gas pipe, the gas pipe is provided with a natural gas cut-off valve, and the first water inlet pipe is further provided with an electromagnetic valve.

[0009] According to one preferred embodiment, one side of the second water inlet pipe is provided with a fixing sleeve, the second water inlet pipe is connected with the outside through the fixing sleeve, one side of the pressure sensor is provided with a bearing box, the bearing box is clamped in the fixing sleeve, the bearing box opening surface is provided with an elastic diaphragm, a bearing cavity is formed, and the bearing cavity is filled with silicon oil.

[0010] According to one preferred embodiment, the pressure sensor is provided with a first fixing plate, one side of the pressure sensor is provided with a second fixing plate, one end of the second fixing plate is rotatably connected with the first fixing plate, both ends of the first fixing plate and the second fixing plate are provided with connecting holes, connecting bolts are clamped in the connecting holes, the first fixing plate and the second fixing plate are connected to form a fixing ring, and the fixing ring is sleeved on the second water inlet pipe.

[0011] According to one preferred embodiment, one side of the water heater body is provided with a smoke exhaust box and a smoke exhaust structure, the smoke exhaust box is connected with the water heater body and the smoke exhaust structure through a smoke exhaust pipe; the smoke exhaust box is provided with a gas component sensor, and a gas component sensor probe is clamped in the smoke exhaust box.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1. The heat exchanger body is installed in the water heater body, and the second water inlet pipe on the heat exchanger is connected with the first water inlet pipe on the water heater body through the connecting pipe, so that the external water source can smoothly enter the whole system; A pressure sensor is arranged on the second water inlet pipe, a bearing box on one side of the pressure sensor is clamped in a fixed sleeve on the second water inlet pipe, an elastic diaphragm is arranged on the opening surface of the bearing box, a bearing box is formed between the two, silicon oil is filled in the bearing box, the pressure of the second water inlet pipe is transmitted to the silicon oil through the elastic diaphragm, and the silicon oil transmits the pressure to the pressure sensor, so that the function of isolating water and the pressure sensor is realized, and the pressure sensor is protected from the influence of impurities and corrosive substances in water. At the same time, the pressure change can also be sensed, so that the internal leakage condition can be detected, and once internal leakage occurs, the slight change of pressure can be quickly captured, and the continuous deterioration of internal leakage is avoided. The processing module in the control assembly can quickly process the pressure data, and when an abnormality is detected, the alarm lamp on the control box flashes and the buzzer issues an alarm, so that the user can be timely reminded. Moreover, the natural gas cut-off valve on the gas pipe at the bottom of the water heater body and the electromagnetic valve on the water inlet pipe can quickly act when internal leakage is detected, so as to cut off the supply of gas and water, thereby reducing the possibility of safety hazards and comprehensively ensuring the safety of the user using the gas water heater.

[0014] 2. The gas sensor arranged on the control assembly is located at one end of the through slot of the water heater body, and the opening surface of the installation groove is provided with a protective cover with a gas passage; the gas sensor can detect the gas in the water heater body through the through slot, so as to monitor the inside of the water heater in real time, whether there is natural gas leakage or other abnormal conditions, and cooperate with the pressure sensor to form a double protection. At the same time, the water heater body is provided with a smoke exhaust box and a smoke exhaust structure on one side, the smoke in the water heater body will first enter the smoke exhaust box and then be discharged through the smoke exhaust structure; the gas component sensor arranged on the smoke exhaust box can analyze the gas components in the smoke exhaust box, and when the heat exchanger leaks, if water leaks into the smoke side, the composition of the smoke will change. Under normal circumstances, the humidity and oxygen content in the smoke are relatively stable. If internal leakage occurs, the humidity in the smoke will increase significantly, and the oxygen content may decrease slightly due to the influence of water. The internal leakage condition is judged by analyzing the change of these gas components; the three protection formed by the multiple pressure sensors, the gas sensor and the gas component sensor improves the safety of the operation of the gas water heater. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structure schematic view of the utility model after assembly;

[0016] Figure 2 is a structure schematic view of the utility model after disassembly;

[0017] Figure 3is the structural schematic view of the smoke exhaust box and the gas composition sensor after being split;

[0018] Figure 4 is the structural schematic view of the pressure sensor after being split;

[0019] Figure 5 is the bottom view of the utility model;

[0020] Figure 6 is the structural schematic view of the control box;

[0021] Figure 7 is the principle block diagram of the control assembly.

[0022] In the figure, the corresponding relationship of component name and figure number is as follows:

[0023] 11, water heater body; 12, first water inlet pipe; 13, through groove; 14, gas pipe; 15, natural gas cut-off valve; 16, electromagnetic valve; 17, smoke exhaust box; 18, smoke exhaust structure; 21, heat exchanger body; 22, second water inlet pipe; 23, fixed sleeve; 31, pressure sensor; 32, gas sensor; 33, bearing box; 34, elastic diaphragm; 35, first fixed plate; 36, second fixed plate; 37, gas composition sensor; 41, control box; 42, processing module; 43, control cover plate; 44, control panel; 45, alarm lamp; 46, mounting groove; 47, protective cover. DETAILED DESCRIPTION

[0024] The embodiment of the utility model is further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the technical scheme of the utility model, but cannot be used to limit the protection scope of the utility model.

[0025] Example:

[0026] As Figures 1 to 7As shown, the utility model provides a kind of gas water heater heat exchanger leakage detection device, including water heater body 11 with heat exchanger body 21, heat exchanger body 21 is installed in the inside specific air of water heater body 11, the bottom of water heater body 11 is provided with first water inlet pipe 12, is the water source inlet passage of entire gas water heater, and external water source is introduced.And the bottom of heat exchanger body 21 is equipped with second water inlet pipe 22, first water inlet pipe 12 is connected with second water inlet pipe 22 by connecting pipe and ensures the sealing property and stability of connection, to enable water flow to flow from water heater body 11 to heat exchanger body 21 smoothly.Pressure sensor 31 is installed on second water inlet pipe 22, and pressure sensor 31 monitors the pressure change in water pipe, and pressure sensor 31 can use MPM489 pressure sensor, and one side of water heater body 11 is provided with control assembly, and this control assembly is responsible for processing various information.In this control assembly, gas sensor 32 is also provided, and water heater body 11 is provided with through slot 13, and the through slot 13 provides passage for the circulation of gas, and gas sensor 32 is installed at one end of through slot 13, can real-time sense various information of gas passing through through slot 13, so that water heater can be monitored in the process of running, whether it is the component change of gas or the abnormal gas leakage condition that can appear, can be discovered in time, to provide double protection for the safe operation of water heater, and gas sensor 32 can use MQ-4 natural gas sensor.

[0027] As Figure 2 、 Figure 5 、 Figure 6 As shown, control assembly includes control box 41 with processing module 42, control cover plate 43 is connected with control box 41, and both constitutes relatively closed control cavity.Processing module 42 is installed in control cavity, and processing module 42 can be responsible for processing and analyzing various data information, and processing module 42 can use STM32F103 series microcontroller.Control panel 44 is also provided on control cover plate 43, and control panel 44 is connected with processing module 42 by special connecting wire, convenient for transferring the operation instruction of user to processing module 42, and also can feedback the information after processing to user, and control panel 44 can use capacitive touch screen control panel TPC-10.

[0028] The top of the control box 41 is provided with an alarm lamp 45, which will emit a clear light signal when the system appears abnormal condition. On one side of the alarm lamp 45 is also configured a buzzer, which will emit a loud sound when the abnormal condition occurs, playing a double warning role. The control box 41 is also provided with a special installation groove 46, the gas sensor 32 is clamped in the installation groove 46. In order to protect the gas sensor 32 and ensure its normal work, a protective cover 47 is installed on the opening surface of the installation groove 46, which is provided with a plurality of air grooves. The air grooves not only ensure that the gas can smoothly contact the gas sensor 32, but also effectively prevent foreign matter from damaging the gas sensor 32.

[0029] The bottom of the water heater body 11 is provided with a gas pipe 14 for conveying natural gas, and a natural gas shut-off valve 15 is installed on the gas pipe 14. The natural gas shut-off valve 15 can quickly cut off the supply of natural gas when the system detects an abnormal condition, thereby avoiding the occurrence of dangerous situations. At the same time, an electromagnetic valve 16 is also provided on the first water inlet pipe 12, which can control the flow and on-off of water according to the instructions of the system, together with the natural gas shut-off valve 15, to ensure the safety of the system from both gas and water aspects.

[0030] As shown in Figure 4 The side of the second water inlet pipe 22 is provided with a fixed sleeve 23, which allows the second water inlet pipe 22 to maintain a through state with the outside world, ensuring the normal flow of water and the balance of pressure. A bearing box 33 is provided on one side of the pressure sensor 31, which is clamped in the fixed sleeve 23. The opening surface of the bearing box 33 is provided with an elastic diaphragm 34, and the two are connected to form a bearing cavity. The bearing cavity is filled with silicone oil, which has good pressure conduction performance. The pressure of the second water inlet pipe 22 is transmitted to the silicone oil through the elastic diaphragm 34, and the silicone oil transmits the pressure to the pressure sensor 31, which can isolate the water from the pressure sensor 31 and protect the pressure sensor 31 from impurities and corrosive substances in the water. At the same time, it can also sense the change of pressure, so as to detect the internal leakage condition. Once internal leakage occurs, the slight change of pressure can be quickly captured, avoiding the continuous deterioration of internal leakage.

[0031] The first fixed plate 35 is arranged on the pressure sensor 31, and the second fixed plate 36 is arranged on one side of the pressure sensor 31. One end of the second fixed plate 36 is rotatably connected with the first fixed plate 35. The first fixed plate 35 and the one end of the second fixed plate 36 are provided with connecting holes, and the connecting bolt can be arranged in the connecting holes. When the connecting bolt connects the first fixed plate 35 and the second fixed plate 36, the first fixed plate 35 and the second fixed plate 36 jointly form a fixed ring. The fixed ring can be sleeved on the second water inlet pipe 22, so that the pressure sensor 31 can be stably installed on the second water inlet pipe 22. Not only can the connection between the pressure sensor 31 and the second water inlet pipe 22 be firm and reliable, but also the stable working state can be maintained when the water flow impact or temperature change occurs, so as to ensure the accurate detection of the pressure.

[0032] As shown in Figure 3 The smoke exhaust box 17 is connected with the water heater body 11 and the smoke exhaust structure 18 through the smoke exhaust pipe to form a smoke exhaust channel system, so that the smoke generated during the operation of the water heater can be orderly discharged. The gas component sensor 37 is arranged on the smoke exhaust box 17, and the probe of the gas component sensor 37 is arranged in the smoke exhaust box 17 and can directly contact the gas flowing through the smoke exhaust box 17. The gas component sensor 37 can analyze the gas in the smoke exhaust box 17 in detail and detect the content of various components. The gas component sensor 37 can be an NDIR non-dispersive infrared gas sensor.

[0033] During the operation of the water heater, different components of gas are generated with the operation of the heat exchanger. The gas enters the smoke exhaust box 17 through the smoke exhaust pipe, and the gas component sensor 37 can monitor the component change in real time. For example, under normal circumstances, the gas can contain a certain proportion of carbon dioxide, water vapor and other common gases. However, when the heat exchanger has an abnormality such as internal leakage, some substances that should not exist in the smoke gas can be mixed into the smoke gas, or the content of some gases can be obviously changed. The gas component sensor 37 can timely detect these changes, and can quickly respond to the slight decrease of oxygen content or the appearance of other special gas components.

[0034] The specific use mode and effect of the embodiment are as follows:

[0035] First, the external water source access hot water heater body 11 bottom of the first water pipe 12, water flow will be through the connecting pipe from the first water pipe 12 to the second water pipe 22 at the bottom of the heat exchanger body 21. In the process, the second water pipe 22 on the pressure sensor 31 will monitor the pressure changes in the water pipe in real time. When the water heater starts running, the control assembly in the processing module 42 will continue to process various data information. Users can input operation instructions through the control panel 44 on the control cover plate 43, these instructions will be transmitted to the processing module 42 through the connecting wire, and the processed information will also be fed back to the user. The gas in the hot water heater body 11 flows through the through slot 13, and the gas sensor 32 installed at one end of the through slot 13 can sense various information of the gas in real time, monitor the internal gas environment, including composition change and abnormal leakage. If the system has an abnormal condition, the alarm lamp 45 on the top of the control box 41 will emit a clear light signal, and the buzzer on the side will emit a loud sound for double warning. When the natural gas supply needs to be controlled, the natural gas cut-off valve 15 on the gas pipe 14 at the bottom of the hot water heater body 11 will quickly cut off the supply when the system detects an abnormality; and the electromagnetic valve 16 on the first water pipe 12 can control the flow and on-off of water according to the system instruction, ensuring safety from gas and water.

[0036] For the pressure sensor 31, the pressure of the second water pipe 22 is transmitted to the silicon oil in the bearing box 33 through the elastic diaphragm 34, and the silicon oil transmits the pressure to the pressure sensor 31. It can isolate water from the pressure sensor 31, protect it from impurities and corrosive substances, and detect internal leakage at the same time. Once the internal leakage causes a slight change in pressure, it can be quickly captured. The exhaust gas box 17 is connected with the hot water heater body 11 and the exhaust gas structure 18 through the exhaust gas pipe to form an exhaust gas channel system. The gas composition sensor 37 on the exhaust gas box 17 can directly contact the gas flowing through the exhaust gas box 17 through its probe, and monitor the change of gas composition in real time. When the heat exchanger has an abnormal condition such as internal leakage, it will quickly respond when the gas composition changes.

[0037] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments.

Claims

1. A gas water heater heat exchanger internal leakage detection device, comprising a water heater body (11) and a heat exchanger body (21), characterized in that: The heat exchanger body (21) is installed in the water heater body (11), the bottom of the water heater body (11) is provided with a first water inlet pipe (12), the bottom of the heat exchanger body (21) is provided with a second water inlet pipe (22), the first water inlet pipe (12) is connected with the second water inlet pipe (22) through a connecting pipe, the second water inlet pipe (22) is provided with a pressure sensor (31), one side of the water heater body (11) is provided with a control assembly, the control assembly is also provided with a gas sensor (32), the water heater body (11) is provided with a through slot (13), and the gas sensor (32) is located at one end of the through slot (13).

2. A gas water heater heat exchanger leak detection device according to claim 1, characterised in that: The control assembly comprises a control box (41) and a processing module (42), a control cover plate (43) is connected with the control box (41) and forms a control cavity, the processing module (42) is installed in the control cavity, the control cover plate (43) is provided with a control panel (44), and the control panel (44) is connected with the processing module (42) through connecting wires.

3. A gas water heater heat exchanger leak detection apparatus according to claim 2, characterised in that: The control box (41) is provided with an alarm lamp (45) on the top, the alarm lamp (45) is also provided with a buzzer on one side, the control box (41) is provided with a mounting groove (46), the gas sensor (32) is clamped in the mounting groove (46), the opening surface of the mounting groove (46) is also provided with a protective cover (47), and a plurality of air grooves are formed in the protective cover (47).

4. A gas water heater heat exchanger leak detection apparatus according to claim 3, characterised in that: The water heater body (11) is provided with a gas pipe (14) at the bottom, the gas pipe (14) is provided with a natural gas cut-off valve (15), and the first water inlet pipe (12) is also provided with an electromagnetic valve (16).

5. A gas water heater heat exchanger leak detection device according to claim 1, characterised in that: The second water inlet pipe (22) is provided with a fixed sleeve (23) on one side, the second water inlet pipe (22) penetrates the outside through the fixed sleeve (23), the pressure sensor (31) is provided with a bearing box (33) on one side, and the bearing box (33) is clamped in the fixed sleeve (23); the opening surface of the bearing box (33) is provided with an elastic diaphragm (34), a bearing cavity is formed, and the bearing cavity is filled with silicon oil.

6. A gas water heater heat exchanger leak detection apparatus according to claim 5 wherein: The pressure sensor (31) is provided with a first fixed plate (35), the pressure sensor (31) is provided with a second fixed plate (36) on one side, one end of the second fixed plate (36) is rotatably connected with the first fixed plate (35), and both ends of the second fixed plate (36) are provided with connecting holes, connecting bolts are arranged in the connecting holes, the first fixed plate (35) and the second fixed plate (36) are connected to form a fixed ring, and the fixed ring is arranged on the second water inlet pipe (22).

7. A gas water heater heat exchanger leak detection device according to claim 1 wherein: The water heater body (11) is provided with a smoke exhaust box (17) and a smoke exhaust structure (18) on one side, the smoke exhaust box (17) is connected with the water heater body (11) and the smoke exhaust structure (18) through a smoke exhaust pipe; the smoke exhaust box (17) is provided with a gas component sensor (37), and a probe of the gas component sensor (37) penetrates into the smoke exhaust box (17).

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