Condensing wall-mounted boiler and water seal device

Abstract

The present invention relates to a condensing wall-mounted boiler and a water seal device. The water seal device includes: a main pipeline, along which a first position and a second position are sequentially distributed in the direction against gravity; a drainage pipeline, which is communicated with the main pipeline at the first position; an auxiliary pipeline, which is communicated with the main pipeline at the second position; a first electrode pin and a second electrode pin, the first electrode pin is arranged in the main pipeline, the second electrode pin is arranged in the auxiliary pipeline, and the first electrode pin and the second electrode pin are electrically connected to each other when the liquid level in the main pipeline reaches the second position. In this way, when the liquid level does not reach the second position, the water flow will not pass through the first electrode and the second electrode at the same time, and the first electrode and the second electrode will not be misconnected when the drainage pipeline is not blocked, and the judgment of the blockage fault is relatively accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of wall-mounted boilers, and particularly to a condensing wall-mounted boiler and a water seal device. Background Art

[0002] Gas-fired heating and hot water boilers, also known as wall-mounted boilers, can be divided into conventional wall-mounted boilers and condensing wall-mounted boilers. The condensing wall-mounted boiler improves the heat exchange efficiency of the whole machine and the energy efficiency of the unit by using high-temperature flue gas for secondary heat exchange. However, the resulting condensate has also become an issue that needs to be considered and addressed in the design of condensing wall-mounted boilers.

[0003] In the structure of a condensing wall-mounted boiler, the condensate generated by the secondary heat exchange of high-temperature flue gas accumulates in the water seal device and can be discharged through the condensate drain pipe in the water seal device. However, when the condensate drain pipe is blocked, the condensate in the water seal device cannot be discharged in time, and the condensate accumulates continuously in the water seal device. During the continuous rising process, the condensate will flow back into the furnace through the condensate outlet pipe connected to the water seal device, causing the core components such as the fan, proportional valve, and burner to be flooded with water, resulting in the failure and damage of the unit. Therefore, a fault sensing device needs to be set up to give an alarm feedback in time when it is detected that the condensate drain pipe is blocked to protect the unit.

[0004] Generally, the method for detecting a blockage fault is electrode detection. Specifically, two electrode needles are arranged at the upper and lower ends of the main pipeline in the water seal device. When the condensate drain pipe is blocked and the liquid level continuously rises, and the water submerges the two electrode needles and conducts, the unit will give a fault reminder. However, in actual use, when the condensate flows down along the main pipeline and passes through the two electrode needles, it may cause the two electrode needles to conduct in advance, and when the condensate drain pipe is not blocked, a false fault reminder of the unit will be issued, and the water seal device's judgment of the blockage fault is not accurate enough. Summary of the Invention

[0005] Based on this, it is necessary to provide a water seal device that improves the accuracy of blockage fault judgment.

[0006] A water seal device, comprising:

[0007] A main pipeline, along which a first position and a second position are sequentially distributed in the reverse gravity direction;

[0008] A drainage pipeline, communicating with the main pipeline at the first position;

[0009] An auxiliary pipeline, communicating with the main pipeline at the second position; and

[0010] A first electrode needle and a second electrode needle, the first electrode needle is arranged in the main pipeline, the second electrode needle is arranged in the auxiliary pipeline, and the first electrode needle and the second electrode needle are conducted with each other when the liquid level in the main pipeline reaches the second position.

[0011] In the above-mentioned condensing wall-mounted boiler, when condensed water continuously flows into the main pipeline, if the drainage pipeline is blocked, the liquid level continuously rises, and when it exceeds the first position and reaches the second position farther from the bottom end of the main pipeline, the condensed water can overflow into the auxiliary pipeline. The water seal device further includes a first electrode pin and a second electrode pin. The first electrode pin is arranged in the main pipeline, and the second electrode is arranged in the auxiliary pipeline. The first electrode pin and the second electrode pin are electrically connected to each other when the liquid level in the main pipeline reaches the second position. That is, when the drainage pipeline is blocked and the liquid level of the condensed liquid rises and flows into the auxiliary pipeline, both the first electrode and the second electrode come into contact with the water flow and are electrically connected to each other. In this way, the first electrode and the second electrode are not both arranged in the main pipeline. Before the liquid level reaches the second position, the water flow will not pass through the first electrode and the second electrode at the same time, and the first electrode and the second electrode will not be misconnected when the drainage pipeline is not blocked, improving the accuracy of the water seal device in judging the blockage fault.

[0012] In one embodiment, the main pipeline includes an inner pipe and an outer pipe sleeved around the outer periphery of the inner pipe at intervals. The inner pipe has a water inlet end and a water outlet end that communicate with each other. The outer pipe has a top end and a bottom end distributed along the direction of gravity. The first position and the second position are sequentially distributed on the outer pipe along the axial direction of the outer pipe from the bottom end to the top end.

[0013] The water inlet end of the inner pipe protrudes from the top end of the outer pipe. A gap is reserved between the water outlet end of the inner pipe extending into the outer pipe and the bottom end of the outer pipe. The first electrode pin is arranged on the inner wall of the outer pipe.

[0014] In one embodiment, the first electrode pin is located between the first position and the bottom end of the outer pipe.

[0015] In one embodiment, a collection box is further included. The collection box is communicated with the auxiliary pipeline. The collection box has a collection cavity for accommodating the water flow flowing out of the auxiliary pipeline.

[0016] In one embodiment, a drainage switch is further included. A drainage port communicating with the collection cavity is formed on the collection box. The drainage switch is arranged at the drainage port and closes or opens the drainage port.

[0017] In one embodiment, a controller is further included. When the first electrode pin and the second electrode pin are electrically connected, the controller controls the drainage switch to close.

[0018] In one embodiment, a liquid level detection mechanism is further included. The liquid level detection mechanism is used to detect the actual liquid level in the collection box and send it to the controller. When the actual liquid level exceeds the preset liquid level, the controller controls the drain switch to open; when the actual liquid level is lower than the preset liquid level, the controller controls the drain switch to close.

[0019] In one embodiment, the liquid level detection mechanism includes a third electrode pin and a fourth electrode pin disposed in the collection chamber. One of the third electrode pin and the fourth electrode pin is disposed at the preset liquid level, and the other of the third electrode pin and the fourth electrode pin is disposed below the preset liquid level.

[0020] When the third electrode pin and the fourth electrode pin are conducted, the controller controls the drain switch to open; when the third electrode pin and the fourth electrode pin are disconnected, the controller controls the drain switch to close.

[0021] In one embodiment, a blockage fault reminder is further included. When the first electrode pin and the second electrode pin are conducted, the controller controls the blockage fault reminder to turn on; when the first electrode pin and the second electrode pin are disconnected, the controller controls the blockage fault reminder to turn off.

[0022] The present invention also provides a condensing wall-mounted boiler, including the above water seal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the water seal device in an embodiment of the present invention when the drain pipe is not blocked;

[0024] Figure 2 is Figure 1 a schematic structural diagram of a state when the drain pipe of the water seal device shown is blocked;

[0025] Figure 3 is Figure 2 a schematic structural diagram of another state when the drain pipe of the water seal device shown is blocked. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] As Figure 1 shown, in an embodiment of the present invention, a water seal device 100 is provided, which can be applied to a condensing wall-mounted boiler. In a condensing wall-mounted boiler, the flue gas is condensed to recover the heat energy in the flue gas. At the same time, the condensed water generated by the condensation of the flue gas can be discharged into the water seal device 100 through the condensed water outlet pipe, and a water seal is formed by accumulating in the water seal device 100 to prevent the internal flue gas from leaking, and at the same time, the condensed water can be discharged through the water seal device 100.

[0030] The water seal device 100 includes a main pipeline 10, a drainage pipeline 30 and an auxiliary pipeline 50. The top end of the main pipeline 10 is open to communicate with the condensed water outlet pipe of the secondary heat exchanger, allowing condensed water to flow into the main pipeline 10. The bottom end of the main pipeline 10 is closed to accumulate the flowing condensed water in the main pipeline 10. The first position and the second position are sequentially distributed on the main pipeline 10 along the direction against gravity. The drainage pipeline 30 communicates with the main pipeline 10 at the first position, and the auxiliary pipeline 50 communicates with the main pipeline 10 at the second position. After the condensed water generated by the condensation of the flue gas in the secondary heat exchanger flows into the main pipeline 10 through the condensed water outlet pipe, it first accumulates between the bottom end of the main pipeline 10 and the first position to form a water seal, preventing the flue gas containing harmful gases such as CO in the secondary heat exchanger from entering the room through the drain port 74 and causing poisoning to users. When the condensed water accumulates for a period of time and the liquid level continuously rises and reaches the first position, part of the condensed water can flow into the drainage pipeline 30 and be discharged, and at the same time, a water seal with a stable height is formed in the main pipeline 10.

[0031] And, as Figure 2As shown, when the drain pipe 30 is blocked, the water flow in the main pipe 10 overflows into the auxiliary pipe 50. When condensed water continuously flows into the main pipe 10, if the drain pipe 30 is blocked, the liquid level continuously rises and exceeds the first position to reach the second position farther from the bottom end of the main pipe 10, then the condensed water will overflow into the auxiliary pipe 50. The water seal device 100 further includes a first electrode pin 11 and a second electrode pin 51. The first electrode pin 11 is arranged in the main pipe 10, and the second electrode pin 51 is arranged in the auxiliary pipe 50. The first electrode pin 11 and the second electrode pin 51 are electrically connected to each other when the liquid level in the main pipe 10 reaches the second position. That is, when the drain pipe 30 is blocked and the liquid level of the condensed liquid rises and flows into the auxiliary pipe 50, both the first electrode pin 11 and the second electrode pin 51 come into contact with the water flow and are electrically connected to each other. In this way, since the first electrode pin 11 and the second electrode pin 51 are not both arranged in the main pipe 10, before the liquid level reaches the second position, the water flow will not pass through the first electrode pin 11 and the second electrode pin 51 simultaneously, and the first electrode pin 11 and the second electrode pin 51 will not be misconnected when the drain pipe 30 is not blocked, improving the accuracy of the water seal device 100 in judging the blockage fault.

[0032] The main pipe 10 includes an inner pipe 12 and an outer pipe 14 sleeved around the outer periphery of the inner pipe 12 at intervals. The inner pipe 12 has a water inlet end and a water outlet end that are communicated with each other. The outer pipe 14 has a top end and a bottom end distributed along the direction of gravity. The first position and the second position are sequentially distributed on the outer pipe 14 along the axial direction of the outer pipe 14 from the bottom end to the top end. The outer pipe 14 is communicated with the drain pipe 30 and the auxiliary pipe 50 at the first position and the second position respectively. A gap is reserved between the water outlet end of the inner pipe 12 extending into the outer pipe 14 and the bottom end of the outer pipe 14, and the water inlet end of the inner pipe 12 protrudes from the top end of the outer pipe 14. In this way, the water inlet end of the inner pipe 12 is communicated with the condensed water outlet pipe on the secondary heat exchanger, so that the condensed water enters the inner pipe 12, and the condensed water is allowed to enter the outer pipe 14 through the gap between the inner pipe 12 and the bottom end of the outer pipe 14. Finally, when the liquid level continuously rises, the condensed water can also enter the drain pipe 30 and the auxiliary pipe 50 through the first position and the second position on the outer pipe 14 respectively. That is to say, the condensed water is sent into the outer pipe 14 through the inner pipe 12.

[0033] Further, the first electrode pin 11 is provided on the inner wall of the outer tube 14. The condensed water only flows into the outer tube 14 through the inner tube 12, and the flowing condensed water will not pass through the first electrode pin 11 outside the inner tube 12. Only when the liquid level in the outer tube 14 continuously rises, the condensed water will contact the first electrode pin 11 on the inner wall of the outer tube 14, ensuring the accuracy of detection. Moreover, the first electrode pin 11 is located between the first position and the bottom end of the outer tube 14. When the liquid level of the condensed water in the main pipeline 10 reaches the first position, the first electrode pin 11 has already contacted the condensed water. Then, when the liquid level continues to rise to the second position, the condensed water also contacts the second electrode pin 51, and the first electrode pin 11 and the second electrode pin 51 will be conducted, preventing the first electrode pin 11 from being set higher than the second position and preventing the drainage pipeline 30 from being blocked and the blockage failure not being detected in time when the liquid level rises.

[0034] Furthermore, the outer tube 14 includes a tube body 15 and a water seal cover 16. The water seal cover 16 is covered at one end of the tube body 15 to form a closed bottom end of the outer tube 14, so as to accumulate condensed water in the outer tube 14 to form a water seal.

[0035] The water seal device 100 further includes a controller (not shown in the figure) and a blockage reminder (not shown in the figure). When the first electrode pin 11 and the second electrode pin 51 are conducted, the controller controls the fault reminder to be turned on to remind the user to remove the blockage fault of the drainage pipeline 30 in time. When the first electrode pin 11 and the second electrode pin 51 are disconnected, the controller controls the blockage fault reminder to be turned off. At this time, it means that the drainage pipeline 30 has been conducted and can drain water normally, and the drainage blockage reminder can be removed. Optionally, the blockage reminder can use one or more of various reminder methods such as lights, sounds, and vibrations for reminder, and the specific reminder form of the blockage reminder is not limited here.

[0036] The water seal device 100 further includes a collection box 70. The collection box 70 is communicated with the auxiliary pipeline 50. The collection box 70 has a collection cavity 72 for accommodating the water flowing out of the auxiliary pipeline 50. After the liquid level in the main pipeline 10 reaches the second position, part of the condensed water can enter the collection cavity 72 of the collection box 70 through the auxiliary pipeline 50, and the condensed water generated by the flue gas heat exchange is accommodated in the collection box 70, preventing the condensed water from continuously rising and flowing back into the furnace after the drainage pipeline 30 is blocked, so that the condensing wall-mounted boiler can still work normally after the drainage pipeline 30 is blocked. Thus, when the ambient temperature is relatively low, if the drainage pipeline 30 is blocked, the condensed water can continue to be collected through the collection box 70, and the condensing wall-mounted boiler can continue to work normally. The condensing wall-mounted boiler does not need to stop directly, and it will not cause the condensing wall-mounted boiler and the heating system to freeze due to shutdown, so as to prevent serious situations such as freezing and cracking of the condensing wall-mounted boiler and the heating system.

[0037] Optionally, both the drain pipe 30 and the auxiliary pipe 50 are L-shaped pipes, each including a first pipe section and a second pipe section that are intersectingly connected. The first pipe section is perpendicularly connected and communicated with the main pipe 10, and the second pipe section is parallel to the main pipe 10. The second pipe section in the drain pipe 30 is the drainage section to discharge the condensed water from the outlet of the second pipe section; the second pipe section in the auxiliary pipe 50 is communicated with the collection box 70 to introduce the condensed water into the collection box 70 in a direction parallel to the main pipe 10, so that the water flow can flow from the second pipe section of the occupancy pipe into the collection box 70 under its own gravity.

[0038] Furthermore, the water seal device 100 further includes a drain switch 80. A drain port 74 communicated with the collection cavity 72 is provided on the collection box 70. The drain switch 80 is arranged at the drain port 74 and closes or opens the drain port 74. Thus, when the condensed water level rises and flows into the collection box 70, the drain port 74 can be selectively opened and closed according to the level in the collection box 70. When there is more condensed water accumulated in the collection box 70, the drain switch 80 can be opened to centrally discharge the condensed water, which is more convenient for handling the condensed water. Specifically, when the drain switch 80 is closed, the condensed water flowing into the collection box 70 continuously accumulates and the condensed water level continuously rises; when the drain switch 80 is opened, the condensed water in the collection box 70 can be discharged to release the internal space of the collection box 70. Through the released internal space, the condensed water can continue to be collected, so that the water seal device 100 and the condensing wall-mounted boiler can continue to work. Optionally, the drain switch 80 is an electric two-way ball valve.

[0039] In some embodiments, when the first electrode pin 11 and the second electrode pin 51 are conducted, the controller controls the drain switch 80 to close, so as to accumulate the condensed water flowing out of the auxiliary pipe 50 in the collection box, prevent the condensed water from continuously flowing out through the drain port 74 of the collection box, and drip on the ground or the stove top, affecting the room hygiene. That is to say, when the drain pipe 30 is blocked, the condensed water enters the collection box through the auxiliary pipe 50 and accumulates in the collection box, preventing the condensed water from flowing back into the furnace.

[0040] The water seal device 100 further includes a liquid level detection mechanism. The liquid level detection mechanism is used to detect the actual liquid level in the collection box 70 and send it to the controller. When the actual liquid level in the collection box 70 exceeds the preset liquid level, the controller controls the drain switch 80 to open, so that part of the condensed water in the collection box 70 is discharged from the drain port 74, releasing the internal space of the collection box 70 and reducing the actual liquid level in the collection box 70 to continue to accommodate the condensed water. And when the actual liquid level is lower than the preset liquid level, the controller controls the drain switch 80 to close to avoid the continuous outflow of the condensed water. Optionally, after the actual liquid level is lower than the preset liquid level for a period of time, the controller controls the drain switch 80 to close to reserve more internal space in the collection box 70 and then stop the discharge of the condensed water.

[0041] In this specific embodiment, the liquid level detection mechanism includes a third electrode pin 71 and a fourth electrode pin 73 disposed in the collection chamber 72. One of the third electrode pin 71 and the fourth electrode pin 73 is disposed at a preset liquid level, and the other of the third electrode pin 71 and the fourth electrode pin 73 is disposed below the preset liquid level. When the third electrode pin 71 and the fourth electrode pin 73 are conducting, the controller controls the drain switch 80 to open; when the third electrode pin 71 and the fourth electrode pin 73 are disconnected, the controller controls the drain switch 80 to close.

[0042] As Figure 2 shown, during the continuous accumulation of the condensed water in the collection box 70, the liquid level continuously rises. The liquid level first reaches one of the third electrode pin 71 and the fourth electrode pin 73 at a lower position. The third electrode pin 71 and the fourth electrode pin 73 are not conducting. At this time, the liquid level is low, and there is not much condensed water in the collection box 70, so there is no need to open the drain switch 80 to drain the condensed water; As Figure 3 shown, when the liquid level of the condensed water continues to rise, the liquid level reaches the other of the third electrode pin 71 and the fourth electrode pin 73 at the preset liquid level. Both the third electrode pin 71 and the fourth electrode pin 73 are in contact with the condensed water, and the third electrode pin 71 and the fourth electrode pin 73 conduct with each other. At this time, the liquid level reaches the preset liquid level, and it is necessary to open the drain switch 80 to drain some of the condensed water to release the collection space in the collection box 70. Optionally, the third electrode pin 71 is disposed at a position below the preset liquid level in the collection chamber 72, and the fourth electrode pin 73 is disposed at the preset liquid level in the collection chamber 72.

[0043] It can be understood that in some other embodiments, the liquid level detection mechanism can also be other liquid level sensors, which are not limited herein.

[0044] In an embodiment of the present invention, a condensing wall-mounted boiler is further provided, including the above water seal device 100, which can accurately judge the drainage blockage fault of the condensed water.

[0045] Specifically, the condensing wall-mounted boiler further includes a flue gas heat exchanger. The flue gas heat exchanger has a condensed water outlet pipe, and the condensed water outlet pipe is communicated with the main pipeline 10 in the water seal device 100. The condensed water generated by heat exchange in the flue gas heat exchanger flows into the main pipeline 10 through the condensed water outlet pipe and forms a water seal.

[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0047] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A water seal device (100), characterized in that, Comprising: A main pipeline (10), on which a first position and a second position are sequentially distributed along the direction against gravity; A drainage pipeline (30), communicating with the main pipeline (10) at the first position; An auxiliary pipeline (50), communicating with the main pipeline (10) at the second position; and A first electrode needle (11) and a second electrode needle (51), the first electrode needle (11) is arranged in the main pipeline (10), the second electrode needle (51) is arranged in the auxiliary pipeline (50), and the first electrode needle (11) and the second electrode needle (51) are electrically connected to each other when the liquid level in the main pipeline (10) reaches the second position; The water seal device (100) further includes a collection box (70), the collection box (70) is communicated with the auxiliary pipeline (50), and the collection box (70) has a collection cavity (72) for accommodating the water flowing out of the auxiliary pipeline (50).

2. The water seal device (100) according to claim 1, characterized in that, The main pipeline (10) includes an inner pipe (12) and an outer pipe (14) sleeved outside the inner pipe (12) at intervals. The inner pipe (12) has a water inlet end and a water outlet end that are communicated with each other. The outer pipe (14) has a top end and a bottom end distributed along the direction of gravity. The first position and the second position are sequentially distributed on the outer pipe (14) along the axial direction of the outer pipe (14) from the bottom end to the top end; The water inlet end of the inner pipe (12) protrudes from the top end of the outer pipe (14), and a gap is reserved between the water outlet end of the inner pipe (12) extending into the outer pipe (14) and the bottom end of the outer pipe (14). The first electrode needle (11) is arranged on the inner wall of the outer pipe (14).

3. The water seal device (100) according to claim 2, characterized in that, The first electrode needle (11) is located between the first position and the bottom end of the outer pipe (14).

4. The water seal device (100) according to claim 1, characterized in that, It further includes a drainage switch (80). A drainage port (74) communicating with the collection cavity (72) is opened on the collection box (70). The drainage switch (80) is arranged at the drainage port (74) and closes or opens the drainage port (74).

5. The water seal device (100) according to claim 4, characterized in that, It further includes a controller. When the first electrode needle (11) and the second electrode needle (51) are electrically connected, the controller controls the drainage switch (80) to close.

6. The water seal device (100) according to claim 5, characterized in that, It further includes a liquid level detection mechanism. The liquid level detection mechanism is used to detect the actual liquid level in the collection box (70) and send it to the controller. When the actual liquid level exceeds the preset liquid level, the controller controls the drainage switch (80) to open; when the actual liquid level is lower than the preset liquid level, the controller controls the drainage switch (80) to close.

7. The water seal device (100) according to claim 6, characterized in that, The liquid level detection mechanism includes a third electrode needle (71) and a fourth electrode needle (73) arranged in the collection cavity (72). One of the third electrode needle (71) and the fourth electrode needle (73) is arranged at the preset liquid level, and the other of the third electrode needle (71) and the fourth electrode needle (73) is arranged below the preset liquid level; When the third electrode pin (71) and the fourth electrode pin (73) are conducting, the controller controls the drain switch (80) to open; when the third electrode pin (71) and the fourth electrode pin (73) are disconnected, the controller controls the drain switch (80) to close.

8. The water seal device (100) according to claim 5, characterized in that, It further includes a clogging fault reminder. When the first electrode pin (11) and the second electrode pin (51) are conducting, the controller controls the clogging fault reminder to turn on; when the first electrode pin (11) and the second electrode pin (51) are disconnected, the controller controls the clogging fault reminder to turn off.

9. A condensing wall-mounted boiler, characterized in that, It includes the water seal device (100) according to any one of the above claims 1-8.

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