CN211120029U - Liquid level monitoring structure, drainage device and indirect heating equipment - Google Patents
Liquid level monitoring structure, drainage device and indirect heating equipment Download PDFInfo
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- CN211120029U CN211120029U CN201922194772.4U CN201922194772U CN211120029U CN 211120029 U CN211120029 U CN 211120029U CN 201922194772 U CN201922194772 U CN 201922194772U CN 211120029 U CN211120029 U CN 211120029U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The utility model relates to a liquid level monitoring structure, drainage device and indirect heating equipment, liquid level monitoring structure are used for monitoring the liquid level height of the liquid that awaits measuring, and the liquid level monitoring structure includes: a variable capacitance component; one end of the lifting component extends into the variable capacitance component, and the other end of the lifting component is immersed into liquid to be measured. Wherein, the lifting component can change the capacitance value of the variable capacitance component along with the liquid level lifting of the liquid to be measured. Above-mentioned liquid level detection device accessible lifting unit goes up and down the liquid level of comdenstion water and directly converts the capacitance value of variable capacitance subassembly into, consequently does not receive the influence of the internal resistance difference of comdenstion liquid to higher monitoring accuracy and accuracy have.
Description
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 the existing heat in the high-temperature flue gas discharged by the water heater and the latent heat released by the 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 the production and the life of people, but the following condensed water also becomes a problem to be considered and treated 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 capable of accurately monitoring the working state of a condensate discharging device aiming at the problem that the condensate discharging device in a gas water heater cannot be accurately monitored abnormally
A liquid level monitoring structure for monitoring a liquid level of a liquid to be measured, the liquid level monitoring structure comprising:
a variable capacitance component; and
one end of the lifting component extends into the variable capacitance component, and the other end of the lifting component can be immersed into liquid to be measured;
the lifting assembly can change the capacitance value of the variable capacitance assembly along with the lifting of the liquid level of the liquid to be measured.
Above-mentioned liquid level detection device accessible lifting unit goes up and down the liquid level of comdenstion water and directly converts the capacitance value of variable capacitance subassembly into, consequently does not receive the influence of the internal resistance difference of comdenstion liquid to higher monitoring accuracy and accuracy have.
In one embodiment, the lifting assembly includes a floating ball and a push rod, the floating ball is suspended in the liquid to be measured, one end of the push rod is detachably abutted against the floating ball, and the other end of the push rod extends into the variable capacitance assembly.
In one embodiment, the liquid level monitoring structure further comprises a limiting cover for defining a limiting space, and the floating ball is limited in the limiting space.
In one embodiment, the limiting cover is provided with a water through hole for communicating the limiting space with the external environment.
In one embodiment, the variable capacitor assembly comprises a variable capacitor shell, a first electrode plate, a second electrode plate and an insulating medium, wherein the first electrode plate and the second electrode plate are arranged in the variable capacitor shell at intervals, and the insulating medium is filled between the first electrode plate and the second electrode plate; when the lifting assembly lifts along with the liquid level of the liquid to be measured, one end of the lifting assembly extending into the variable capacitor shell changes the distance between the first electrode plate and the second electrode plate or the dielectric constant of the insulating medium.
In one embodiment, the first electrode plate and the second electrode plate are arranged at intervals in the lifting direction of the liquid level of the liquid to be measured, the first electrode plate and one end of the lifting assembly, which extends into the variable capacitance shell, are fixedly connected, and the second electrode plate is arranged on one side of the first electrode plate, which is opposite to the lifting assembly; when the lifting assembly lifts along with the liquid level of the liquid to be detected, the lifting assembly can drive the first electrode plate to move relative to the second electrode plate so as to change the distance between the first electrode plate and the second electrode plate.
In one embodiment, a first accommodating space and a second accommodating space are formed between the first electrode plate and the second electrode plate, insulating media with different dielectric constants are respectively accommodated in the first accommodating space and the second accommodating space, and when the lifting assembly lifts along with the liquid level of the liquid to be measured, the end of the lifting assembly extending into the variable capacitor shell changes the volumes of the first accommodating space and the second accommodating space.
In one embodiment, the first electrode plate and the second electrode plate are arranged at intervals in a lifting direction perpendicular to the liquid level, the variable capacitor assembly includes a baffle plate located between the first electrode plate and the second electrode plate, the baffle plate divides the variable capacitor housing into a first accommodating space and a second accommodating space which are arranged at intervals in the lifting direction of the liquid level, and the baffle plate can be driven by the lifting assembly to move back and forth in the lifting direction of the liquid level so as to change the volumes of the first accommodating space and the second accommodating space.
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 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 view of a liquid level monitoring structure in an embodiment of the present invention;
fig. 2 is a schematic structural view of a liquid level monitoring structure according to another 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 appliances equipped with the drainage device 100, and is not limited herein.
Referring to fig. 1, the drainage device 100 includes a drainage housing 40 and a drainage pipe (not shown). Specifically, the drain casing 40 has a hollow cylindrical structure, and includes a drain casing bottom wall 41 and a drain casing side wall 43 extending from an edge of the drain casing bottom wall 41 in the same direction, and the drain casing side wall 43 circumferentially surrounds the drain casing bottom wall 41 to form a drain cavity 45. The drain case bottom wall 41 is opened with a drain port 412 communicating with the drain chamber 45, and the drain pipe is connected to the drain case 40 through the drain port 412. In this manner, the condensed water in the drain chamber 45 is discharged through the drain pipe.
In order to monitor the liquid level of the condensed water in the drainage cavity 45, the drainage device 100 further comprises a liquid level monitoring structure 20 installed in the drainage cavity 45, the liquid level monitoring structure 20 can be electrically connected with an external monitoring circuit, and the external monitoring circuit can send a signal to a control device of the heat exchange device according to the state of the liquid level monitoring structure 20.
When the drain pipe is in a normal drainage state, the liquid level monitoring structure 20 is not in contact with the condensed water. When the drain pipe is clogged, the condensed water in the drain chamber 45 is not normally drained but is accumulated in the drain chamber 45, thereby causing the level of the condensed water to rise in the first direction perpendicular to the drain case bottom wall 41. When the liquid level of the condensed water rises to the warning height, the state of the liquid level monitoring structure 20 changes, the external monitoring circuit sends a signal to the control device according to the state of the liquid level monitoring structure 20, and the control device controls the heat exchange equipment to be shut down for protection, so that the liquid level of the condensed water in the drainage cavity 45 is prevented from continuously rising.
With continued reference to fig. 1, the liquid level monitoring structure 20 includes a variable capacitance element 21 and a lifting element 23. One end of the lifting assembly 23 extends into the variable capacitance assembly 21 and the other end of the lifting assembly 23 may be immersed in the condensate in the drain chamber 45. When the condensed water begins to accumulate in the drainage cavity 45 and the liquid level of the condensed water rises continuously, the lifting assembly 23 is positioned at one end of the drainage cavity 45 and rises along with the liquid level of the condensed water, so that the end, extending into the variable capacitor assembly 21, of the lifting assembly 23 correspondingly rises, the capacitance value of the variable capacitor assembly 21 is changed, and the external monitoring circuit acquires the capacitance value of the variable capacitor assembly 21 and sends a signal to the control device according to the capacitance value.
Thus, the liquid level monitoring structure 20 can directly convert the liquid level of the condensed water into the capacitance value of the variable capacitance component 21 through the lifting component 23, and is not affected by the internal resistance difference of the condensed water, so that the monitoring precision and the accuracy are high.
In some embodiments, the lifting assembly 23 includes a float 232, a push rod 234, and a position-limiting cover 236. Specifically, spacing cover 236 is cavity tubular structure, including spacing cover roof and spacing cover lateral wall, spacing cover roof and the 41 intervals of drainage casing diapire set up, and spacing cover lateral wall extends until connecting in drainage casing diapire 41 from spacing cover roof edge to drainage casing diapire 41 direction, and spacing cover lateral wall encircles the periphery of spacing cover roof, defines the spacing space 2361 that is used for spacing floater 232 with spacing cover roof and drainage casing diapire 41 jointly. Further, the side wall of the limiting cover is provided with a plurality of water through holes 2363 which are communicated with the limiting space 2361 and the drainage cavity 45 at intervals. Therefore, when the drain pipe normally drains, the liquid level in the drain cavity 45 is lower than the height of the water through hole 2363, the side wall of the limiting cover blocks the condensed water outside, and no condensed water exists in the communication space 2361. And when the drain pipe was in the jam state, the liquid level of the comdenstion water in drainage chamber 45 constantly rose, in water hole 2363 got into spacing space 2361, the liquid level in spacing space 2361 rose gradually until equal all the time with the water level in drainage chamber 45.
The floating ball 232 is limited in the limiting space 2361, and when condensed water does not exist in the limiting space 2361, the floating ball 232 falls on the bottom wall 41 of the drainage shell. When condensed water exists in the spacing space 2361, the floating ball 232 can float in the condensed water (i.e., a part of the floating ball 232 is located below the liquid level of the condensed water, and another part of the floating ball 232 is located above the liquid level). The push rod 234 includes a main body and a holding portion disposed at an end of the main body, and the holding portion extends along a direction perpendicular to the main body to increase a contact area with the floating ball 232. One end of the push rod main body extends into the variable capacitor assembly 21, the other end of the push rod main body provided with the abutting part penetrates through the top wall of the limiting cover to extend into the limiting space 2361, and the abutting part detachably abuts against the floating ball 232. Thus, the float 232 may rise in the first direction along with the rising of the liquid level of the condensed water, and further drive the push rod 234 to rise in the first direction.
The variable capacitance assembly 21 includes a variable capacitance case 211, a first electrode plate 212, a second electrode plate 213, and an insulating medium 214. The first electrode plate 212 and the second electrode plate 213 are spaced in the variable capacitance case 211, the insulating medium 214 is filled between the first electrode plate 212 and the second electrode plate 213, and one end of the push rod 234 extends into the variable capacitance case 211. When the lifting assembly 23 is lifted in the first direction along with the liquid level of the liquid to be measured, the end of the push rod 234 extending into the variable capacitance housing 211 can change the distance between the first electrode plate 212 and the second electrode plate 213 or the dielectric constant of the insulating medium.
According to the formula C/d (where C is a capacitance value and is a dielectric constant of the insulating medium 214 between the first electrode plate 212 and the second electrode plate 213, S is a facing area of the first electrode plate 212 and the second electrode plate 213, and d is a distance between the first electrode plate 212 and the second electrode plate 213), when the dielectric constant of the insulating medium 214 between the first electrode plate 212 and the second electrode plate 213 or the distance d between the first electrode plate 212 and the second electrode plate 213 changes, the capacitance value C of the variable capacitance assembly 21 changes.
As shown in fig. 1, in some embodiments, the first electrode plate 212 and the second electrode plate 213 are disposed at an interval in a lifting direction (i.e., a first direction) of a liquid level of the condensed water, the first electrode plate 212 is fixedly connected to one end of the push rod 234 extending into the variable capacitor housing 211, the second electrode plate 213 is disposed on a side of the first electrode plate 212 opposite to the lifting assembly 23, and the push rod 234 can drive the first electrode plate 212 to move relative to the second electrode plate 213 to change a distance between the first electrode plate 212 and the second electrode plate 213.
Thus, when the level of the condensed water in the drain chamber 45 is accumulated in the drain chamber 45 due to the clogging of the drain pipe and the level of the condensed water gradually rises, the float 232 follows the drain pipeWhen the liquid level of the condensed water moves upward, the pushing rod 234 is pushed to move upward, and further the first electrode plate 212 is driven to move toward the second electrode plate 213, and the distance d between the first electrode plate 212 and the second electrode plate 213 decreases, thereby increasing the capacitance C of the variable capacitance assembly 21. When the capacitance value C is increased to be greater than or equal to the preset maximum capacitance value CmaxAnd when the temperature is higher than the set temperature, the monitoring circuit sends a signal to the control device, and the heat exchange equipment is shut down for protection.
As shown in fig. 2, in other embodiments, the first electrode plate 212 and the second electrode plate 213 are spaced in a direction perpendicular to the rising and falling direction of the liquid level of the condensed water (i.e., the first direction), the variable capacitor assembly 21 further includes a baffle 215 located between the first electrode plate 212 and the second electrode plate 213, the baffle 215 divides the variable capacitor housing 211 into a first accommodating space and a second accommodating space spaced in the first direction, and the first accommodating space and the second accommodating space respectively accommodate a first insulating medium 214a and a second insulating medium 214b having different dielectric constants. When the lifting assembly 23 is lifted along with the liquid level of the liquid to be measured, the baffle 215 can be driven by the push rod 234 to move in the first direction, so as to change the volumes of the first accommodating space and the second accommodating space.
Specifically, in one embodiment, the dielectric constant of the first insulating medium 214a in the first accommodating space is greater than the dielectric constant of the second insulating medium 214b in the second accommodating space, so that when the baffle 215 moves upward, the first accommodating space decreases, the second accommodating space increases, and thus the capacitance value C of the variable capacitance component 21 decreases. When the capacitance value C is reduced to be equal to or less than the preset minimum capacitance value CminWhen the liquid level in the drainage cavity 45 reaches the maximum allowable liquid level, the monitoring circuit sends a signal to the control device, and the heat exchange equipment is shut down for protection.
Above-mentioned liquid level monitoring structure 20, drainage device 100 and indirect heating equipment can directly convert the lift of the liquid level of condensate into the capacitance value change of variable capacitance subassembly 21 through the liquid level monitoring structure 20 who sets up in drainage casing 40 to can accurately judge whether drainage device 100 blocks up. Because the liquid level monitoring structure is not influenced by non-uniform gas source components of the heat exchange equipment, the liquid level monitoring structure 20 has higher monitoring precision and reliability, and the safe operation of the heat exchange equipment is ensured.
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 (11)
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:
a variable capacitance component (21); and
one end of the lifting component (23) extends into the variable capacitance component (21), and the other end of the lifting component (23) can be immersed into liquid to be measured;
the lifting assembly (23) can change the capacitance value of the variable capacitance assembly (21) along with the lifting of the liquid level of the liquid to be measured.
2. The liquid level monitoring structure of claim 1, wherein the lifting assembly (23) comprises a floating ball (232) and a push rod (234), the floating ball (232) is suspended in the liquid to be measured, one end of the push rod (234) is detachably abutted against the floating ball (232), and the other end of the push rod (234) extends into the variable capacitance assembly (21).
3. The liquid level monitoring structure according to claim 2, further comprising a limiting cover (236) defining a limiting space (2361), wherein the floating ball (232) is limited in the limiting space (2361).
4. The liquid level monitoring structure according to claim 3, wherein the limit cover (236) is provided with a water through hole (2363) for communicating the limit space (2361) with the external environment.
5. The liquid level monitoring structure according to claim 1, wherein the variable capacitor assembly (21) comprises a variable capacitor shell (211), a first electrode plate (212), a second electrode plate (213) and an insulating medium (214), the first electrode plate (212) and the second electrode plate (213) are arranged in the variable capacitor shell (211) at intervals, and the insulating medium (214) is filled between the first electrode plate (212) and the second electrode plate (213); when the lifting assembly (23) rises and falls along with the liquid level of the liquid to be measured, one end, extending into the variable capacitance shell (211), of the lifting assembly (23) changes the distance between the first electrode plate (212) and the second electrode plate (213) or the dielectric constant of the insulating medium (214).
6. The liquid level monitoring structure according to claim 5, wherein the first electrode plate (212) and the second electrode plate (213) are disposed at an interval in a lifting direction of the liquid level of the liquid to be measured, the first electrode plate (212) is fixedly connected to one end of the lifting assembly (23) extending into the variable capacitance housing (211), and the second electrode plate (213) is disposed on a side of the first electrode plate (212) facing away from the lifting assembly (23); when the lifting assembly (23) lifts along with the liquid level of the liquid to be measured, the lifting assembly (23) can drive the first electrode plate (212) to move relative to the second electrode plate (213) so as to change the distance between the first electrode plate (212) and the second electrode plate (213).
7. The liquid level monitoring structure according to claim 5, wherein a first accommodating space and a second accommodating space are formed between the first electrode plate (212) and the second electrode plate (213), the first accommodating space and the second accommodating space respectively accommodate insulating mediums (214) with different dielectric constants, and when the lifting assembly (23) is lifted along with the liquid level of the liquid to be measured, the end of the lifting assembly (23) extending into the variable capacitance shell (211) changes the volume of the first accommodating space and the volume of the second accommodating space.
8. The liquid level monitoring structure of claim 7, wherein the first electrode plate (212) and the second electrode plate (213) are spaced in a lifting direction perpendicular to the liquid level, the variable capacitor assembly (21) comprises a baffle plate (215) located between the first electrode plate (212) and the second electrode plate (213), the baffle plate (215) divides the variable capacitor housing (211) into a first accommodating space and a second accommodating space which are spaced in the lifting direction of the liquid level, and the baffle plate (215) can be driven by the lifting assembly (23) to move back and forth in the lifting direction of the liquid level to change the volume of the first accommodating space and the second accommodating space.
9. A drain arrangement comprising a fluid level monitoring structure according to any one of claims 1 to 8.
10. A drain device according to claim 9, characterized in that the drain device comprises a drain housing (40), the drain housing (40) being provided with a drain cavity (45) and a drain opening (412) communicating with the drain cavity (45), the liquid level monitoring structure being mounted in the drain cavity (45).
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922194772.4U CN211120029U (en) | 2019-12-09 | 2019-12-09 | Liquid level monitoring structure, drainage device and indirect heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922194772.4U CN211120029U (en) | 2019-12-09 | 2019-12-09 | Liquid level monitoring structure, drainage device and indirect heating equipment |
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| Publication Number | Publication Date |
|---|---|
| CN211120029U true CN211120029U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922194772.4U Active CN211120029U (en) | 2019-12-09 | 2019-12-09 | Liquid level monitoring structure, drainage device and indirect heating equipment |
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| CN (1) | CN211120029U (en) |
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- 2019-12-09 CN CN201922194772.4U patent/CN211120029U/en active Active
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