Water seal structure, drainage device and heat exchange equipment

Abstract

The present invention relates to a water seal structure, a drainage device and a heat exchange equipment, wherein the water seal structure comprises: a water seal structure main body, which is provided with an interconnected water inlet, a water outlet and a bypass port, wherein the bypass port is located between the water inlet and the water outlet in the gravity direction, and the central axis of the bypass port extends along the gravity direction; a pressure detection unit, one end of which is inserted into the water seal structure main body from the bypass port along the gravity direction, and the pressure detection unit is used to detect the air pressure in the water seal structure main body and send out a liquid level signal according to the air pressure. In the above-mentioned water seal structure, when the air pressure value in the water seal structure main body exceeds the preset maximum air pressure value, it indicates that the water seal structure is blocked and the condensed water cannot be discharged normally, so the pressure detection unit sends out a liquid level fault signal, thereby controlling the heat exchange unit to shut down to avoid the continued generation of condensed water, thereby preventing the condensed water from flowing back to the heat exchange unit and causing the heat exchange unit to fail or even be damaged.

Description

Technical Field

[0001] The invention relates to the field of condensed water treatment, and in particular to a water seal structure, a drainage device and a heat exchange equipment. Background Art

[0002] Gas heating water boilers, also known as wall-mounted boilers, can be divided into conventional wall-mounted boilers and condensing wall-mounted boilers. Among them, condensing wall-mounted boilers use high-temperature flue gas for secondary heat exchange, which improves the heat exchange efficiency of the whole machine and the energy efficiency of the unit. However, the condensed water that comes with it has also become a problem that needs to be considered and handled in the design of condensing wall-mounted boilers.

[0003] Condensing wall-mounted boilers will produce condensed water during the combustion process. There are some impurities in the condensed water. When these impurities are concentrated at the water seal outlet and blocked, the condensed water drain pipe will be blocked. The water in the drain pipe will accumulate more and more, and the water will spread to the combustion chamber of the condensing wall-mounted boiler and the entire unit, extinguishing the fire in the combustion chamber, forcing the wall-mounted boiler unit to stop working, and causing damage to parts in the unit. Summary of the invention

[0004] Based on this, it is necessary to provide a water seal structure, drainage device and heat exchange equipment that can prevent the wall-mounted boiler from being damaged due to blockage of the drainage device, in order to solve the problem of damage to the wall-mounted boiler due to blockage of the drainage device.

[0005] A water seal structure, comprising:

[0006] The water seal structure body is provided with a water inlet, a water outlet and a bypass port which are interconnected, wherein the bypass port is located between the water inlet and the water outlet in the gravity direction, and the central axis of the bypass port extends along the gravity direction; and

[0007] A pressure detection unit, one end of which is inserted into the water seal structure body from the bypass port along the gravity direction, and the pressure detection unit is used to detect the air pressure in the water seal structure body and send a liquid level signal according to the size of the air pressure.

[0008] For the above-mentioned water seal structure, when the air pressure value in the main body of the water seal structure exceeds the preset maximum air pressure value, it indicates that the water seal structure is blocked and the condensed water cannot be discharged normally. Therefore, the pressure detection unit sends a liquid level fault signal, and then controls the heat exchanger unit to shut down to avoid further generation of condensed water, thereby preventing the condensed water from flowing back into the heat exchanger unit and causing failure or even damage to the heat exchanger unit.

[0009] In one of the embodiments, the pressure detection unit is limited relative to the water seal structure body in the direction of gravity.

[0010] In one embodiment, one end of the pressure detection unit inserted into the water seal structure body is provided with a limiting gap along the circumferential direction, and the water seal structure also includes a fixing member, which passes through the water seal structure body in a direction intersecting with the gravity direction and is at least partially limited in the limiting gap.

[0011] In one embodiment, the fixing member includes a first fixing portion and a second fixing portion connected to one end of the first fixing portion, the first fixing portion passes through the water seal structure body along a direction intersecting with the direction of gravity and is partially confined within the limiting gap, and the second fixing portion passes through the water seal structure body along a direction intersecting with the direction of gravity and is arranged around the periphery of the pressure detection unit.

[0012] In one embodiment, a first limiting groove and a second limiting groove are formed at one end of the water seal structure body close to the bypass port, the first limiting groove and the second limiting groove are arranged at intervals along the radial direction of the water seal structure body, and both are connected to the limiting gap;

[0013] The two free ends of the first fixing portion and the second fixing portion separated from each other pass through the first limiting slot and the second limiting slot respectively, and are both fixed to the water seal structure body.

[0014] In one of the embodiments, the water seal structure further includes a sealing ring, which is sleeved on the outer periphery of one end of the pressure detection unit inserted into the water seal structure body and abuts against the inner wall of the water seal structure body.

[0015] In one embodiment, the water seal structure body includes a water seal pipe, a bypass pipe and a water outlet pipe, the water inlet is opened in the water seal pipe, one end of the bypass pipe is connected to the water seal pipe, the other end of the bypass pipe extends vertically along the anti-gravity direction and forms the bypass port, the water outlet pipe is connected to the bypass pipe, and the end of the water outlet pipe away from the bypass pipe forms the water outlet.

[0016] A drainage device comprises the above-mentioned water seal structure, wherein the drainage device comprises a drainage pipe connected to the water inlet of the water seal structure body.

[0017] A heat exchange device comprises the above-mentioned water seal structure.

[0018] In one embodiment, the heat exchange device is a wall-mounted boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a drainage device according to an embodiment of the present invention;

[0020] Figure 2for Figure 1 The schematic diagram of the assembly of the water level detection unit and the fixing parts of the drainage device shown;

[0021] Figure 3 for Figure 2 The schematic diagram of the assembly of the water level monitoring unit of the drainage device shown;

[0022] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0023] Figure 5 for Figure 2 Schematic diagram of the structure of the fixing parts shown. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given 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, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention 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 related listed items.

[0027] like Figure 1 As shown, a heat exchange device of an embodiment of the present invention includes a heat exchange unit and a drainage device 100 connected to the heat exchange unit. The structure of the drainage device 100 in the present application is described below by taking the heat exchange device as a condensing wall-mounted boiler as an example. This embodiment is only used as an example and does not limit the technical scope of the present application. It can be understood that in other embodiments, the heat exchange device can also be specifically other equipment equipped with the drainage device 100, which is not limited here.

[0028] Please continue reading Figure 1The drainage device 100 includes a water seal structure 20 and a drainage pipe 40, the inlet end of the drainage pipe 40 is connected to the heat exchange unit, and the outlet end of the drainage pipe 40 is connected to the water inlet of the water seal structure 20. In this way, the condensed water discharged from the heat exchange unit enters the water seal structure 20 through the drainage pipe 40.

[0029] The water seal structure 20 includes a water seal structure body 21 and a pressure detection unit 23. The pressure detection unit 23 is installed in the water seal structure body 21, and is used to detect the air pressure in the water seal structure body 21, and send a liquid level signal according to the air pressure. When the air pressure value in the water seal structure body 21 exceeds the preset maximum air pressure value, it indicates that the water seal structure 20 is blocked, and the condensed water in the water seal structure body 21 cannot be discharged normally. Therefore, the pressure detection unit 23 sends a liquid level fault signal, and then controls the heat exchange unit to stop to avoid further generation of condensed water, thereby preventing the condensed water from flowing back to the heat exchange unit and causing the heat exchange unit to malfunction or even damage.

[0030] Specifically, in some embodiments, the water seal structure body 21 includes a water seal pipe 212, a bypass pipe 214, and a water outlet pipe 216 that are interconnected. Specifically, the water seal pipe 212 includes a water inlet pipe 2121 and a water storage pipe 2123, the water storage pipe 2123 extends vertically along the gravity direction, one end of the water inlet pipe 2121 is inserted into the water storage pipe 2123 from the top of the water storage pipe 2123, and extends to the bottom of the water storage pipe 2123 along the gravity direction, the other end of the water inlet pipe 2121 is located outside the water storage pipe 2123 and forms a water inlet, the drainage pipe 40 is sleeved outside one end of the water inlet pipe 2121 forming the water inlet and is connected to the water inlet pipe 2121 through the water inlet, and an overflow port for connecting to the bypass pipe 214 is opened at one end of the water storage pipe 2123 near the water inlet of the water inlet pipe 2121.

[0031] The bypass pipe 214 includes a first bypass section 2141 and a second bypass section 2143. One end of the first bypass section 2141 is connected to the water storage pipe 2123 through an overflow port. The other end of the first bypass section 2141 extends in the horizontal direction to connect with the second bypass section 2143. The second bypass section 2143 extends upward from the first bypass section 2141 in the anti-gravity direction. The end of the second bypass section 2143 away from the first bypass section 2141 forms a bypass port with a central axis extending in the gravity direction. An opening is also provided in the middle of the first bypass section 2141. The water outlet pipe 216 is connected to the bypass pipe 214 through the opening. The water outlet pipe 216 extends vertically downward in the gravity direction. The end of the water outlet pipe 216 away from the bypass pipe 214 forms a water outlet for discharging condensed water.

[0032] Thus, in terms of gravity, the bypass port is located between the water inlet and the water outlet. When the drainage device 100 is in a normal drainage state, the condensed water discharged from the drainage pipe 40 enters the water storage pipe 2123 through the water inlet pipe 2121, and the water level of the condensed water rises continuously from the bottom of the water storage pipe 2123 until it reaches the overflow port, and then flows into the first bypass section 2141 of the bypass pipe 214 through the overflow port, and finally flows into the water outlet pipe under the action of gravity and is discharged through the water outlet of the water outlet pipe 216. Since the water seal pipe 212 filled with condensed water has a good sealing effect, it can effectively prevent smoke from leaking into the water outlet pipe 216. When the drainage device 100 is in a blocked state and cannot drain water normally, the condensed water accumulates continuously in the bypass pipe 214.

[0033] One end of the pressure detection unit 23 is inserted from the bypass port to the second bypass section 2143 of the bypass pipe 214 along the gravity direction. The pressure detection unit 23 is used to detect the air pressure in the water seal structure body 21 and send a liquid level signal according to the size of the air pressure. When the drainage device 100 is in a blocked state, condensed water accumulates in the bypass pipe 214 and compresses the air in the bypass pipe 214, so that the air pressure value obtained by the pressure detection unit 23 gradually increases. When the air pressure value obtained by the detection exceeds the maximum air pressure value set by the pressure detection unit 23, the pressure detection unit 23 sends a liquid level fault signal to the heat exchanger unit. The heat exchanger unit obtains the liquid level fault signal and stops working to stop generating condensed water, thereby avoiding damage to the heat exchanger unit due to condensed water flowing back from the drainage device 100 into the heat exchanger unit.

[0034] Since the pressure value in the water seal structure main body 21 is detected by the vertically installed pressure detection unit 23 instead of directly detecting the water level in the water seal structure main body 21, there will be no false alarm phenomenon, which improves the control accuracy and prevents the frequent shutdown of the wall-mounted boiler due to false alarms. Moreover, even if the drainage device 100 is blocked, due to the formation of cavitation in the second bypass section 2143, condensed water will not enter the pressure detection unit 23, thereby improving the service life of the pressure detection unit 23.

[0035] like Figure 2-Figure 4As shown, further, in some embodiments, one end of the pressure detection unit 23 inserted in the water seal structure body 21 is provided with a limiting gap 232 along the circumferential direction, and the limiting gap 232 has limiting side walls on both sides in the gravity direction. The drainage device 100 also includes a fixing member 25, which passes through the water seal structure body 21 in a direction intersecting with the gravity direction and is at least partially limited in the limiting gap 232. In this way, the pressure detection unit 23 is limited relative to the water seal structure body 21 in the gravity direction by the fixing member 25. When the pressure in the water seal structure body 21 is too large, the pressure detection unit 23 has a tendency to move upward, and the limiting side wall below the limiting gap 232 abuts against the fixing member 25, thereby being blocked by the fixing member 25 in the vertical direction, and the pressure detection unit 23 cannot be detached from the bypass pipe 214.

[0036] Specifically in one embodiment, a first limiting groove 2143a and a second limiting groove 2143b are provided on the side wall of the water seal structure body 21 near the bypass port. The first limiting groove 2143a and the second limiting groove 2143b are arranged at intervals along the radial direction of the water seal structure body 21, and both are connected to the limiting gap 232. Figure 4 and 5 As shown, the fixing member 25 includes a first fixing portion 252 and a second fixing portion 254 connected to one end of the first fixing portion 252. The free end of the first fixing portion 252 separated from the second fixing portion 254 extends in a straight line, passes through the first limiting slot 2143a in the horizontal direction, and is partially limited in the limiting gap 232. The free end of the second fixing portion 254 separated from the first fixing portion 252 is arc-shaped, and the radius of the second fixing portion 254 matches the radius of the bypass pipe 214, so the second fixing portion 254 passes through the second limiting slot 2143b in the horizontal direction and is partially arranged around one side of the pressure detection unit 23.

[0037] In this way, the fixing member 25 is fixed to the water seal structure body 21. When the pressure detection unit 23 has a tendency to move in the anti-gravity direction due to the pressure in the water seal structure body 21, the first fixing portion 252 passing through the first limiting slot 2143a and limited in the limiting gap 232 can prevent the pressure detection unit 23 from moving in the anti-gravity direction, thereby preventing the pressure detection unit 23 from falling out of the bypass pipe 214. Since the second fixing portion 254 is circumferentially arranged around the outside of the pressure detection unit 23, the fixing member 25 will not be loosened from the water seal structure body 21 in the horizontal direction, nor will it prevent the pressure detection unit 23 from rotating around its own axis.

[0038] It can be understood that the limiting method of the pressure detection unit 23 in the gravity direction is not limited. In some embodiments, the pressure detection unit 23 can be threadedly matched with the bypass pipe 214.

[0039] like Figure 3As shown, in some embodiments, the drainage device 100 further includes a sealing ring 27, which surrounds the outer periphery of one end of the pressure detection unit 23 inserted in the bypass pipe 214 and abuts against the inner wall of the water seal structure body 21. In this way, the sealing ring 27 plays a sealing role to prevent the gas in the water seal structure body 21 from leaking through the gap between the pressure detection unit 23 and the bypass pipe 214, thereby ensuring the detection accuracy of the pressure detection unit 23.

[0040] The water seal structure 20, the drainage device 100 and the heat exchange equipment adopt a vertically installed pressure detection unit 23 to detect the air pressure value in the water seal structure body 21, thereby avoiding false alarms. Therefore, when the drainage device 100 is blocked and cannot drain water normally, condensed water is prevented from flowing back into the heat exchange unit. In addition, due to the cavitation effect, the pressure detection unit 23 is prevented from directly contacting the condensed water in the water seal structure body 21, so that the pressure detection unit 23 has a longer service life.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A water seal structure, characterized in that: The water seal structure comprises: The water seal structure body (21) is provided with a water inlet, a water outlet and a bypass port which are interconnected, wherein the bypass port is located between the water inlet and the water outlet in the gravity direction, and the central axis of the bypass port extends along the gravity direction; and A pressure detection unit (23) has one end inserted into the water seal structure body (21) from the bypass port along the gravity direction. The pressure detection unit (23) is used to detect the air pressure in the water seal structure body (21) and send a liquid level signal according to the magnitude of the air pressure.

2. The water seal structure according to claim 1, characterized in that: The pressure detection unit (23) is limited in position relative to the water seal structure main body (21) in the direction of gravity.

3. The water seal structure according to claim 2, characterized in that: One end of the pressure detection unit (23) inserted into the water seal structure body (21) is provided with a limiting gap (232) along a circumferential direction, and the water seal structure (20) further comprises a fixing member (25), wherein the fixing member (25) passes through the water seal structure body (21) in a direction intersecting with the gravity direction and is at least partially limited in the limiting gap (232).

4. The water seal structure according to claim 3, characterized in that: The fixing member (25) comprises a first fixing portion (252) and a second fixing portion (254) connected to one end of the first fixing portion (252); the first fixing portion (252) passes through the water seal structure body (21) along a direction intersecting with the direction of gravity and is partially limited in the limiting gap (232); the second fixing portion (254) passes through the water seal structure body (21) along a direction intersecting with the direction of gravity and is arranged around the periphery of the pressure detection unit (23).

5. The water seal structure according to claim 4, characterized in that: A first limiting groove (2143a) and a second limiting groove (2143b) are provided at one end of the water seal structure body (21) close to the bypass port, the first limiting groove (2143a) and the second limiting groove (2143b) are arranged at intervals along the radial direction of the water seal structure body (21), and both are in communication with the limiting gap (232); The two free ends of the first fixing portion (252) and the second fixing portion (254) separated from each other pass through the first limiting slot (2143a) and the second limiting slot (2143b) respectively, and are both fixed to the water seal structure body (21).

6. The water seal structure according to claim 1, characterized in that: The water seal structure (20) further comprises a sealing ring (27), wherein the sealing ring (27) is sleeved on the outer periphery of one end of the pressure detection unit (23) inserted into the water seal structure body (21) and abuts against the inner wall of the water seal structure body (21).

7. The water seal structure (20) according to any one of claims 1 to 6, characterized in that: The water seal structure body (21) comprises a water seal pipe (212), a bypass pipe (214) and a water outlet pipe (216); the water inlet is opened in the water seal pipe (212); one end of the bypass pipe (214) is connected to the water seal pipe (212); the other end of the bypass pipe (214) extends vertically in the anti-gravity direction and forms the bypass port; the water outlet pipe (216) is connected to the bypass pipe (214); the end of the water outlet pipe (216) away from the bypass pipe (214) forms the water outlet.

8. A drainage device, characterized in that: It comprises the water seal structure according to any one of claims 1 to 7, wherein the drainage device comprises a drainage pipe (40), and the drainage pipe (40) is connected to the water inlet of the water seal structure body (21).

9. A heat exchange device, characterized in that: It comprises a water seal structure as described in any one of claims 1 to 7.

10. The heat exchange device according to claim 9, characterized in that: The heat exchange equipment is a wall-mounted boiler.

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