CN211503275U

CN211503275U - Liquid level monitoring structure, drainage device and indirect heating equipment

Info

Publication number: CN211503275U
Application number: CN201922245632.5U
Authority: CN
Inventors: 吴威龙; 张霞; 吴萌雨
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-15
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a liquid level monitoring structure, drainage device and indirect heating equipment, the liquid level monitoring structure includes: the lifting transmission mechanism comprises a floating ball and a transmission component controlled by the floating ball; the monitoring mechanism comprises a control switch, a first monitoring circuit and a second monitoring circuit, wherein the control switch is controlled by the transmission assembly and can select one of the first monitoring circuit and the second monitoring circuit to be conducted; when the floating ball drops to a first position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch to conduct the first monitoring circuit; when the floating ball rises to a second position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch to conduct the second monitoring circuit. Above-mentioned liquid level detection device, accessible lifting transmission mechanism convert the liquid level lift of comdenstion water into the break-make of first monitoring circuit and second monitoring circuit, have higher monitoring accuracy and accuracy.

Description

Liquid level monitoring structure, drainage device and indirect heating equipment

Technical Field

The utility model relates to a heat transfer technical field especially relates to a liquid level monitoring structure, drainage device and indirect heating equipment.

Background

Along with the development of economic technology and the improvement of living standard, people pay more and more attention to environmental protection, and along with the improvement of energy efficiency requirements of people on household appliance products.

The condensing gas water heater is a device which utilizes gas combustion to heat and output hot water for people to use. Because the condensing type water heater can utilize the efficient condensing preheating recovery device to absorb sensible heat in high-temperature flue gas discharged by the water heater and latent heat released by condensation of water vapor, the heat efficiency of the condensing type gas water heater is far higher than that of a common water heater, so that the condensing type gas water heater is more and more widely applied to production and life of people, but the accompanying condensed water also becomes a problem to be considered and processed in the design of the condensing type wall-mounted boiler. According to the requirements of CJ/T395-_u＝1Should be no more than 0.2%.

The condensate monitoring mode of the existing condensing gas water heater mainly has two types:

one of them monitoring mode is through pure structural design, and when the condensate blockked up, the effective area of discharging fume of the exhaust port of condensing furnace can reduce, consequently usable wind pressure monitoring devices indirectly monitors the condensate and blocks up. The monitoring mode has high requirements on the structure of the condensation cavity, smoke discharge resistance can be increased, and the structural design requirement and the processing difficulty are higher.

The other monitoring mode is that the conductivity of the condensate is utilized, a detection electrode is arranged in a condensation cavity or a condensate collecting device, whether the electrode is immersed in the condensate or not is monitored through a special detection circuit, and whether the condensate is blocked or not is directly judged. The monitoring mode is influenced by the internal resistance of the condensate, particularly the gas source components of the fuel gas are not uniform at present, the internal resistance difference of the generated condensate is large, and the reliability is greatly reduced, so that whether the condensate is blocked or not is difficult to accurately monitor, and potential safety hazards are brought to the use of the fuel gas water heater.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a liquid level monitoring structure, a drainage device and a heat exchange device which can accurately monitor the working state of the condensate discharging device aiming at the problem that the condensate discharging device in the gas water heater cannot be accurately monitored.

A liquid level monitoring structure for monitoring a liquid level of a liquid to be measured, the liquid level monitoring structure comprising:

the lifting transmission mechanism comprises a floating ball and a transmission assembly controlled by the floating ball; and

the monitoring mechanism comprises a control switch, a first monitoring circuit and a second monitoring circuit, wherein the control switch is controlled by the transmission assembly and can selectively conduct the first monitoring circuit and the second monitoring circuit;

when the floating ball drops to a first position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch to conduct the first monitoring circuit; when the floating ball rises to a second position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch to conduct the second monitoring circuit.

Above-mentioned liquid level detection device, accessible lifting drive mechanism convert the liquid level lift of comdenstion water into the break-make of first monitoring circuit and second monitoring circuit, consequently do not receive the influence of condensate internal resistance difference, have higher monitoring accuracy and accuracy.

In one embodiment, when the floating ball is in the first position, the floating ball is separated from the transmission component, and the transmission component operates the control switch to conduct the first monitoring circuit; when the floating ball is located at the second position, the floating ball adsorbs the transmission assembly, and the transmission assembly operates the control switch to conduct the second monitoring circuit.

In one embodiment, the float ball is located in the second monitoring circuit, and when the second monitoring circuit is turned on, the float ball generates magnetism to attract the transmission assembly, and when the first monitoring circuit is turned off, the float ball loses magnetism to be separated from the transmission assembly.

In one embodiment, the transmission assembly comprises a support seat and a lever, the lever is supported on the support seat, and the lever is controlled by the floating ball to rotate by taking a support point of the floating ball on the support seat as a rotation center.

In one embodiment, the lever comprises a first end and a second end which are respectively positioned at two sides of the supporting point, the first end is positioned on a lifting path of the floating ball, and the second end is connected with the control switch;

when the floating ball is located at the first position, the floating ball is separated from the first end, and the second end drives the control switch to conduct the first monitoring circuit; when the floating ball is located at the second position, the floating ball adsorbs the first end, and the second end drives the control switch to conduct the second monitoring circuit.

In one embodiment, the first end is provided with an attracted piece which can be attracted by magnetism, and the floating ball can attract the attracted piece within a preset attraction distance.

In one embodiment, the transmission assembly further includes a first tension spring and a second tension spring, a moment of the first tension spring is greater than a moment of the second tension spring, the first tension spring is configured to apply a tension to the second end to enable the control switch to conduct the first monitoring circuit, and the second tension spring is configured to apply a tension to the control switch to enable the control switch to conduct the second monitoring circuit.

In one embodiment, the first monitoring circuit is provided with a first contact, the second monitoring circuit is provided with a second contact, and the control switch can contact the first contact to conduct the first monitoring circuit or contact the second contact to conduct the second monitoring circuit.

A drainage device comprises the liquid level monitoring structure.

In one embodiment, the drainage device comprises a drainage shell, the drainage shell is provided with a drainage cavity and a drainage port communicated with the drainage cavity, and the liquid level monitoring structure is partially installed in the drainage cavity.

The heat exchange equipment comprises the liquid level monitoring structure, and is a condensing gas water heater.

Drawings

Fig. 1 is a schematic structural diagram of a drainage device according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a heat exchange apparatus (not shown) according to an embodiment of the present invention is provided with a drainage device 100 for draining condensed water. The structure of the middle drain device 100 according to the present application will be described below by taking an example in which the heat exchanger is a condensing gas water heater. The present embodiment is described as an example, and the technical scope of the present application is not limited thereto. It is understood that in other embodiments, the heat exchange device may also be embodied as other devices equipped with the drainage device 100, and is not limited herein.

The drain device 100 includes a drain housing 20 and a drain pipe (not shown). Specifically, the drainage housing 20 is a hollow cylindrical structure, and includes a bottom wall and a side wall extending from an edge of the bottom wall in the same direction, and the side wall circumferentially surrounds the bottom wall to form the drainage cavity 21. The bottom wall is provided with a water outlet 23 communicated with the water discharge cavity 21, and the water discharge pipe is connected with the water discharge shell 20 through the water outlet 23. In this manner, the condensed water in the drain chamber 21 is drained through the drain pipe. It is to be understood that the shape and configuration of the drain case 20 are not limited thereto, and may be provided in various shapes as needed.

In order to monitor the liquid level of the condensed water in the drainage cavity 21, the drainage device 100 further includes a liquid level monitoring structure 40 installed in the drainage cavity 21, the liquid level monitoring structure 40 may be electrically connected to a main control board of the heat exchange device, and the main control board may control the operating state of the heat exchange device according to the operating state of the liquid level monitoring structure 40.

Specifically, when the drain pipe is in a normal drainage state, the liquid level monitoring structure 40 is not in contact with the condensed water. When the drain pipe is clogged, the condensed water in the drain chamber 21 is not normally drained but is continuously accumulated in the drain chamber 21, thereby causing the level of the condensed water to be continuously raised in the first direction perpendicular to the bottom wall of the drain housing 20. When the liquid level of the condensed water rises to the warning height, the working state of the liquid level monitoring structure 40 changes, and the main control board controls the heat exchange equipment to be shut down and protected according to the working state of the liquid level monitoring structure 40, so that the liquid level of the condensed water in the drainage cavity 21 is prevented from continuously rising.

Referring to fig. 1, the liquid level monitoring structure 40 includes a lifting transmission mechanism and a monitoring mechanism, the lifting transmission mechanism can control the working state of the monitoring mechanism according to the lifting of the liquid level of the condensed water, the monitoring mechanism is electrically connected to the main control board, and the main control board can control the heat exchange device according to the working state of the monitoring mechanism.

The lifting transmission mechanism comprises a limiting cover 412, a floating ball 414 and a transmission component controlled by the floating ball 414.

Specifically, spacing cover 412 is cavity tubular structure, including spacing cover roof and spacing cover lateral wall, and spacing cover roof sets up with the diapire interval of drainage casing 20, and spacing cover lateral wall extends until connecting in the diapire of drainage casing 20 from spacing cover roof edge to the diapire direction of drainage casing 20, and spacing cover lateral wall encircles the periphery of spacing cover roof, defines the spacing space that is used for spacing floater 414 with spacing cover roof and drainage casing 20's diapire jointly. The side wall of the limiting cover is provided with a plurality of water through holes 4121 which are communicated with the limiting space and the drainage cavity 21 at intervals.

When the drain pipe normally drains, the liquid level in the drainage cavity 21 is lower than the height of the water through hole 4121, and the side wall of the limiting cover blocks the condensed water outside, so that no condensed water exists in the communicating space. And when the drain pipe was in the jam state, the liquid level of the comdenstion water in the drainage chamber 21 was constantly risen, in the water hole 4121 got into spacing space, the liquid level in the spacing space rose gradually until equal with the water level in the drainage chamber 21.

The floating ball 414 is limited in the limit space, and the floating ball 414 can be located at a first position or a second position along with the rise and fall of the liquid level of the liquid to be measured. When there is no condensed water in the space, the floating ball 414 falls on the bottom wall of the drain housing 20 to be at the first position (i.e., the lowest limit position of the floating ball 414). When condensed water exists in the limiting space, the floating ball 414 can float in the condensed water and is located between the first position and the second position (i.e., a part of the floating ball 414 is located below the liquid level of the condensed water, and another part of the floating ball 414 is located above the liquid level). When the level of the condensed water in the limiting space rises to the warning height, the floating ball 414 is at the second position (i.e. the highest limit position of the floating ball 414).

Specifically, the float 414 is substantially spherical and includes a float body and an electromagnet disposed on the float body. The electromagnet can generate magnetism in the power-on state to attract the transmission assembly, and when the electromagnet is in the power-off state, the electromagnet loses magnetism and is separated from the transmission assembly. Thus, the floating ball 414 controls the working state of the transmission assembly according to the liquid level of the condensed water in an electromagnet adsorption mode. It is understood that the shape and specific configuration of the floating ball 414 are not limited, and may be configured according to different requirements.

The transmission assembly comprises a support base 4161 and a lever 4163. The supporting seat 4161 is fixed to an external fixing structure, the lever 4163 is in a rod-shaped structure, the middle portion of the lever 4163 is supported on the supporting seat 4161, and the floating ball 414 is controlled to rotate around a supporting point of the floating ball on the supporting seat 4161, so that the transmission assembly is in the first working state or the second working state.

The lever 4163 includes a first end 4162 and a second end 4164 on either side of the support point. The first end 4162 is provided with an attracted member 4162a located on the ascending and descending path of the float 414, and the attracted member 4162a is made of a material such as metal that can be magnetically attracted by the float 414 and thus can be brought into contact with the float 414 by the attraction of the float 414. The second end 4164 is connected to the monitoring mechanism for changing the operating state of the monitoring mechanism.

Specifically, when the floating ball 414 is in the first position, the floating ball 414 is separated from the attracted part 4162a and keeps a certain distance from the attracted part 4162a, so that the attraction force to the attracted part 4162a is small and the initial position of the first end 4162 cannot be changed, and the transmission assembly is in the first working state. In the process that the floating ball 414 rises to the second position along with the liquid level of the condensed water, the attraction force of the floating ball 414 to the first end 4162 is gradually increased. When the floating ball 414 reaches the second position, the distance between the floating ball 414 and the first end 4162 is gradually decreased, so that the attraction force on the attracted part 4162a is gradually increased until the attracted part 4162a contacts with the attracted part 4162a, thereby driving the transmission assembly to switch to the second working state.

The monitoring mechanism includes a control switch 432, a first monitoring circuit 434 and a second monitoring circuit 436, the first monitoring circuit 434 and the second monitoring circuit 436 are mutually exclusive circuits, and the control switch 432 is controlled by the transmission component to selectively conduct the first monitoring circuit 434 and the second monitoring circuit 436.

Specifically, the first monitoring circuit 434 and the second monitoring circuit 436 are connected in parallel to the main control board, the first monitoring circuit 434 is provided with a first contact 4341, and the second monitoring circuit 436 is provided with a second contact 4361. The control switch 432 is a rocker switch, one end of the control switch 432 is used for contacting the first contact 4341, the other end of the control switch 432 is used for contacting the second contact 4361, and one end of the control switch 432 close to the first contact 4341 is connected with the second end 4164 of the lever 4163. Thus, the second end 4164 of the lever 4163 operates the control switch 432 to contact the first contact 4341 to turn on the first monitoring circuit 434 or to contact the second contact 4361 to turn on the second monitoring circuit 436.

Further, the floating ball 414 is located in the first monitoring circuit 434. When the first monitoring circuit 434 is turned on, the floating ball 414 generates magnetism to attract the transmission element. When the first monitoring circuit 434 is turned off, the float 414 loses magnetism and is separated from the transmission assembly, so that when the level of the condensed water gradually drops, the float 414 also gradually drops along with the liquid level until the first position is returned again.

Further, the transmission assembly further includes a first tension spring 4165 and a second tension spring 4167, and the torque of the first tension spring 4165 is greater than the torque of the second tension spring 4167 to assist in controlling the operating state of the lever 4163. Specifically, two ends of the first tension spring 4165 are respectively connected to the second end 4164 of the lever 4163 and the external fixing structure, and are configured to apply a tension to the second end 4164 to turn on the first monitoring circuit 434. Two ends of the second tension spring 4167 are respectively connected to one end of the control switch 432 connected to the second contact 4361 and the external fixing structure, and are configured to apply tension to the control switch 432 to turn on the second monitoring circuit 436.

In this manner, the transmission assembly controlled operation control switch 432 turns on the first monitoring circuit 434 or the second monitoring circuit 436. When the transmission assembly is in the first operating state, the control switch 432 connected to the second end 4164 contacts the first contact 4341 under the tension of the first tension spring 4165 to turn on the first monitoring circuit 434 because the torque of the first tension spring 4165 is greater than the torque of the second tension spring 4167. When the transmission assembly is in the second working state, the second end 4164 of the lever 4163 drives the end of the control switch 432 contacting the first contact 4341 to move upward to separate from the first contact 4341, so that the control switch 432 rotates under the tension of the second tension spring 4167 to contact the second contact 4361 to conduct the second monitoring circuit 436.

The operation of the above drainage device 100 is as follows:

when the drainage device 100 is in a normal drainage state, the condensed water is normally drained through the drainage port 23, so that no condensed water exists in the limiting space, the floating ball 414 is located on the bottom wall of the drainage housing 20 and is separated from the attracted piece 4162a of the first end 4162 of the lever 4163, the control switch 432 contacts the first contact 4341 under the tensile force of the first tension spring 4165 to conduct the first monitoring circuit 434, so that the floating ball 414 is in a conductive state and has magnetism, and the main control board can monitor that the first monitoring circuit 434 is in a conductive state, so as to control the heat exchange device to normally operate.

When the drainage device 100 is in an abnormal drainage state, the drainage port 23 is blocked, the condensed water cannot be drained normally, the liquid level of the condensed water in the drainage cavity 21 and the liquid level of the condensed water in the limit space rise continuously, the floating ball 414 rises continuously along with the liquid level, and the attraction of the floating ball 414 to the attracted piece 4162a increases continuously.

When the floating ball 414 rises to the second position, the floating ball 414 attracts the attracted member 4162a to contact the floating ball 414, so as to drive the second end 4164 of the lever 4163 to move upward to drive one end of the control switch 432 to separate from the first contact 4341, and the other end of the control switch 432 contacts the second contact 4361 under the pulling force of the second tension spring 4167 to conduct the second monitoring circuit 436. At this time, the main control board can monitor that the second monitoring circuit 436 is in a conducting state and the first monitoring circuit 434 is in a disconnecting state, so as to control the shutdown protection of the heat exchange device to prevent the liquid level of the condensed water from continuing to rise.

After the drainage device 100 recovers normal drainage, the first monitoring circuit 434 is in the off state, so the floating ball 414 has no magnetism, and the floating ball 414 can be separated from the floating ball 414 and descend along with the descending of the liquid level, thereby realizing the automatic resetting of the floating ball 414. At the same time, the first end 4162 of the lever 4163 loses the attraction of the floating ball 414 to it, so the second end 4164 of the lever 4163 moves downward under the pulling force of the first tension spring 4167, and finally drives the control switch 432 to leave the second contact 4361 and to contact the first contact 4341 again, so the second monitoring circuit 436 is turned off, and the first monitoring circuit 434 is turned on again to charge the floating ball 414 again.

According to the liquid level monitoring structure 40, the drainage device 100 and the heat exchange equipment, the liquid level monitoring structure 40 arranged in the drainage shell 20 can convert the rise and fall of the liquid level of the condensate into the connection and disconnection of the first monitoring circuit 434 and the second monitoring circuit 436, so that whether the drainage device 100 is blocked or not can be accurately judged according to the through end of the circuit. Because the monitoring process of the liquid level monitoring structure 40 is not affected by the non-uniform gas source components of the heat exchange equipment, the liquid level monitoring structure 40 has higher monitoring precision and reliability, thereby ensuring the safe operation of the heat exchange equipment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a liquid level monitoring structure for the liquid level height of the liquid that awaits measuring of monitoring, its characterized in that, liquid level monitoring structure includes:

the lifting transmission mechanism comprises a floating ball (414) and a transmission component controlled by the floating ball (414); and

the monitoring mechanism comprises a control switch (432), a first monitoring circuit (434) and a second monitoring circuit (436), wherein the control switch (432) is controlled by the transmission component to selectively conduct the first monitoring circuit (434) and the second monitoring circuit (436);

when the floating ball (414) descends to a first position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch (432) to conduct the first monitoring circuit (434); when the floating ball (414) rises to a second position along with the liquid level of the liquid to be detected, the transmission assembly is controlled to operate the control switch (432) to conduct the second monitoring circuit (436).

2. The fluid level monitoring structure of claim 1, wherein when said float ball (414) is in said first position, said float ball (414) is disengaged from said transmission assembly, said transmission assembly operating said control switch (432) to conduct said first monitoring circuit (434); when the floating ball (414) is at the second position, the floating ball (414) adsorbs the transmission component, and the transmission component operates the control switch (432) to conduct the second monitoring circuit (436).

3. The fluid level monitoring structure of claim 2, wherein the float ball (414) is located in the second monitoring circuit (436), the float ball (414) being magnetized to attract the transmission assembly when the second monitoring circuit (436) is turned on, and the float ball (414) being demagnetized to be separated from the transmission assembly when the first monitoring circuit (434) is turned off.

4. The structure of claim 1, wherein said transmission assembly comprises a support seat (4161) and a lever (4163), said lever (4163) is supported on said support seat (4161), said lever (4163) is controlled by said floating ball (414) to rotate around its support point on said support seat (4161).

5. The structure of claim 4, wherein said lever (4163) comprises a first end (4162) and a second end (4164) respectively located on either side of said support point, said first end (4162) being located in the lifting path of said float ball (414), said second end (4164) being connected to said control switch (432);

when the floating ball (414) is in the first position, the floating ball (414) is separated from the first end (4162), and the second end (4164) drives the control switch (432) to conduct the first monitoring circuit (434); when the floating ball (414) is at the second position, the floating ball (414) adsorbs the first end (4162), and the second end (4164) drives the control switch (432) to conduct the second monitoring circuit (436).

6. The fluid level monitoring structure according to claim 5, wherein the first end (4162) is provided with a magnetically attractable member (4162a), and the float ball (414) attracts the attractable member (4162a) within a predetermined attraction distance.

7. The fluid level monitoring structure of claim 5, wherein said transmission assembly further comprises a first tension spring (4165) and a second tension spring (4167), said first tension spring (4165) having a moment greater than a moment of said second tension spring (4167), said first tension spring (4165) being configured to apply a tension to said second end (4164) to cause said control switch (432) to conduct said first monitoring circuit (434), said second tension spring (4167) being configured to apply a tension to said control switch (432) to cause said control switch (432) to conduct said second monitoring circuit (436).

8. The liquid level monitoring arrangement according to claim 1, wherein the first monitoring circuit (434) is provided with a first contact (4341) and the second monitoring circuit (436) is provided with a second contact (4361), and wherein the control switch (432) is contactable with the first contact (4341) for switching on the first monitoring circuit (434) or with the second contact (4361) for switching on the second monitoring circuit (436).

9. A drain arrangement comprising a fluid level monitoring structure according to any one of claims 1 to 8.

10. A drainage apparatus according to claim 9, wherein the drainage apparatus comprises a drainage housing (20), the drainage housing (20) is provided with a drainage chamber (21) and a drainage port (23) communicating with the drainage chamber (21), and the liquid level monitoring structure is partially installed in the drainage chamber (21).

11. A heat exchange device, characterized in that the liquid level monitoring structure of any one of claims 1 to 8 is included, and the heat exchange device is a condensing gas water heater.