CN211345943U - Liquid distributor, falling film heat exchanger and air conditioner - Google Patents
Liquid distributor, falling film heat exchanger and air conditioner Download PDFInfo
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- CN211345943U CN211345943U CN201922202725.XU CN201922202725U CN211345943U CN 211345943 U CN211345943 U CN 211345943U CN 201922202725 U CN201922202725 U CN 201922202725U CN 211345943 U CN211345943 U CN 211345943U
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- 239000007788 liquid Substances 0.000 title claims abstract description 201
- 239000011552 falling film Substances 0.000 title claims description 15
- 238000009826 distribution Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 34
- 239000012530 fluid Substances 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005381 potential energy Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 16
- 239000002184 metal Substances 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The utility model provides a liquid distributor, falling liquid film heat exchanger and air conditioner, the liquid distributor includes: the liquid homogenizing box comprises a liquid homogenizing box (1), wherein a liquid inlet pipe (2) is arranged at the upper end of the liquid homogenizing box (1) in a communicated mode, a plurality of liquid homogenizing holes (11) are formed in the lower end face of the liquid homogenizing box (1), the liquid homogenizing holes (11) are communicated with the inside of the liquid homogenizing box (1), and the liquid homogenizing box (1) is in a trapezoid cross section shape which is small in upper portion and large in lower portion. Through the utility model discloses can increase the liquid level in the homogeneous liquid box effectively, increase the inside gravitational potential energy of homogeneous liquid box, increased fluid pressure, can be effectively through the flow of this pressure control refrigerant, overcome the defect of the unable evenly distributed of refrigerant because the stopping of liquid distributor brings for the refrigerant can be pushed down to the heat exchange tube uniformly on, make it can evenly distributed on the heat exchange tube, the gaseous state refrigerant of having solved the air inlet can't fully contact with the problem of heat exchange tube.
Description
Technical Field
The utility model belongs to the technical field of the heat transfer, concretely relates to liquid distributor, falling liquid film heat exchanger and air conditioner.
Background
In the heat exchanger type for the commercial large-scale water chilling unit, the heat exchanger with the falling film structure is concerned in the evaporation working condition due to the advantages of high heat exchange efficiency, small filling amount, convenience in maintenance and the like. However, when the condensation working condition of the heat exchanger is switched in the water chilling unit, the air inlet at the top can be blocked by the liquid distributor for uniformly distributing the refrigerant under the evaporation working condition, so that the refrigerant is unevenly distributed, the gaseous refrigerant at the air inlet can not be fully contacted with the heat exchange tube, and the heat exchange is completely insufficient by mainly relying on the heat exchange tube at the near region of the liquid distributor.
Because the liquid distributor among the falling film heat exchanger among the prior art admits air at its top and can receive the liquid distributor of evaporation operating mode evenly distributed refrigerant and block, lead to the refrigerant maldistribution, cause the gaseous state refrigerant of air inlet can't fully contact technical problem such as with the heat exchange tube, consequently the utility model discloses research and design a liquid distributor, falling film heat exchanger and air conditioner.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the liquid distributor among the falling film heat exchanger among the prior art and admitting air at its top and can receive the liquid distributor of evaporation operating mode evenly distributed refrigerant and block, leads to refrigerant uneven distribution's defect to a liquid distributor, falling film heat exchanger and air conditioner are provided.
The utility model provides a liquid distributor, it includes:
the liquid homogenizing box is provided with a liquid inlet pipe at the upper end in a communicated manner, a plurality of liquid homogenizing holes are arranged on the lower end face of the liquid homogenizing box and communicated with the inside of the liquid homogenizing box, and the liquid homogenizing box is in a trapezoidal cross section shape with a small upper part and a large lower part in a longitudinal cross section.
Preferably, the first and second electrodes are formed of a metal,
the sum of the sectional areas of the liquid equalizing holes is in the range of 20-40% of the sectional area of the gas inlet of the liquid inlet pipe.
Preferably, the first and second electrodes are formed of a metal,
at least one overflowing hole is further formed in the side edge of the liquid-homogenizing box and communicated with the inside of the liquid-homogenizing box.
Preferably, the first and second electrodes are formed of a metal,
the plurality of overflowing holes are distributed along the horizontal direction; and/or the liquid homogenizing box is of a prismoid structure with a trapezoidal longitudinal section or a circular truncated cone structure with a trapezoidal longitudinal section.
Preferably, the first and second electrodes are formed of a metal,
the sum of the sectional areas of the overflowing holes is larger than the sectional area of the gas inlet of the liquid inlet pipe.
Preferably, the first and second electrodes are formed of a metal,
the height of the liquid homogenizing box in the longitudinal section and the trapezoid section is H, the width of the upper end is A, the width of the lower end is B, and B/A is equal to (0.7-0.9).
Preferably, the first and second electrodes are formed of a metal,
the liquid distributing box is sleeved outside the liquid homogenizing box, and a liquid homogenizing hole of the liquid homogenizing box is communicated with the inside of the liquid distributing box; and a plurality of liquid distribution holes are also arranged on the lower end surface of the liquid distribution box and communicated with the inside of the liquid distribution box.
Preferably, the first and second electrodes are formed of a metal,
the side surface of the liquid distribution box is also provided with at least one air passing hole which is communicated with the inside of the liquid distribution box; and/or the longitudinal section of the liquid distribution box is of a square structure.
The utility model also provides a falling film heat exchanger, it includes preceding arbitrary liquid distributor.
The utility model also provides an air conditioner, it includes preceding arbitrary liquid distributor or aforementioned falling film heat exchanger.
The utility model provides a pair of liquid distributor, falling liquid film heat exchanger and air conditioner have following beneficial effect:
the utility model discloses a set up a homocline box, set up a plurality of homocline holes on its lower terminal surface, can carry out the effect of homocline to liquid or gas-liquid mixture that gets into from the feed liquor pipe, and set up the homocline box into big end down's trapezoidal cross-sectional shape, can effectively reduce the width of upper end under the condition of equal lower extreme width compared with square box, and then effectively increase the liquid level height in the homocline box, thereby increase the gravitational potential energy in the homocline box, increase fluid pressure, can effectively control the flow of refrigerant through this pressure, overcome the defect that the refrigerant can't evenly distribute because of the stopping of liquid distributor, make the refrigerant can be pushed down to the heat exchange tube evenly, make it can evenly distribute on the heat exchange tube, and the ladder-shaped structure of expanding downwards can also form the water conservancy diversion effectively, further promoted the homocline effect, the uniform distribution effect is increased, and the problem that the gaseous refrigerant of the air inlet can not be fully contacted with the heat exchange tube is solved.
Drawings
Fig. 1 is a longitudinal section structure diagram of the falling film heat exchanger of the present invention under the condensation condition;
FIG. 2a is a schematic perspective view of the homogenization box in FIG. 1;
FIG. 2b is a schematic structural diagram of the liquid homogenizing box in the front side in the direction A in FIG. 2 a;
fig. 3 is a longitudinal section structure diagram of the falling film heat exchanger of the present invention under the evaporation condition.
The reference numbers in the figures denote:
1. a liquid homogenizing box; 11. a homogenization hole; 12. an overflowing hole; 2. a liquid inlet pipe; 3. a liquid distribution box; 4. a housing; 5. an air outlet; 6. a liquid baffle; 7. a support plate; 8. a heat exchange zone; 9. a liquid outlet; 10. an airway.
Detailed Description
As shown in fig. 1-3, the utility model provides a liquid distributor, which comprises:
the liquid homogenizing box comprises a liquid homogenizing box 1, wherein a liquid inlet pipe 2 is arranged at the upper end of the liquid homogenizing box 1 in a communicated mode, a plurality of liquid homogenizing holes 11 are arranged on the lower end face of the liquid homogenizing box 1 (preferably uniformly), the liquid homogenizing holes 11 are communicated with the inside of the liquid homogenizing box 1, and the liquid homogenizing box 1 is in a trapezoidal cross section shape which is small in top and large in bottom in the longitudinal cross section.
The utility model discloses a set up a homocline box, set up a plurality of homocline holes on its lower terminal surface, can carry out the effect of homocline to liquid or gas-liquid mixture that gets into from the feed liquor pipe, and set up the homocline box into big end down's trapezoidal cross-sectional shape, can effectively reduce the width of upper end under the condition of equal lower extreme width compared with square box, and then effectively increase the liquid level height in the homocline box, thereby increase the gravitational potential energy in the homocline box, increase fluid pressure, can effectively control the flow of refrigerant through this pressure, overcome the defect that the refrigerant can't evenly distribute because of the stopping of liquid distributor, make the refrigerant can be pushed down to the heat exchange tube evenly, make it can evenly distribute on the heat exchange tube, and the ladder-shaped structure of expanding downwards can also form the water conservancy diversion effectively, further promoted the homocline effect, the uniform distribution effect is increased, and the problem that the gaseous refrigerant of the air inlet can not be fully contacted with the heat exchange tube is solved.
The utility model discloses a trapezoidal liquid box structure of samming promotes liquid level in the liquid box of samming, and it is regional to get into all stringing of gaseous refrigerant equipartition direction of heat exchanger, makes the heat exchange tube obtain make full use of, is favorable to the equal liquid of liquid box secondary of samming.
The utility model discloses a homocline box adopts trapezium structure, and the effective sectional area increases the liquid level in the main reduction homocline box, ensures the liquid level in the box to the refrigerant flow that control entered into the liquid distributor the inside has guaranteed that liquid distributor refrigerant liquid level height is in suitable scope. The proper liquid level height of the refrigerant can eliminate the influence of the manufacturing deviation of the liquid distributor on the uniform liquid distribution of the liquid distributor, and meanwhile, the refrigerant quantity entering the evaporator from the system is adjusted, so that the matching degree of the refrigerant quantity entering the evaporator from the system and the liquid distributor is improved.
Preferably, the first and second electrodes are formed of a metal,
the sum of the sectional areas of the plurality of liquid equalizing holes 11 is in the range of 20% to 40% of the sectional area of the gas inlet of the liquid inlet pipe 2. The sectional area in a plurality of samming holes should not be too big, can cause the equal liquid box of too fast outflow if too big, descend too fast at the heat exchange tube outer wall, reach due falling liquid film heat transfer's effect, and the sectional area in a plurality of samming holes should not the undersize, the undersize can cause to pile up and form the liquid film and can't flow down in the equal liquid hole department, influence the equal liquid box of fluid outflow, can't reach the effect of flow equalizing, consequently the utility model discloses a total sectional area in equal liquid hole sets up to 20% to 40% within range of air inlet sectional area and can enough prevent that equal liquid hole department liquid film from producing, make the fluid reach the effect of flow equalizing, can also prevent to descend too fast, guarantees some equal liquid effects.
Preferably, the first and second electrodes are formed of a metal,
at least one overflowing hole 12 is further formed in the side edge of the liquid homogenizing box 1, and the overflowing hole 12 is communicated with the inside of the liquid homogenizing box 1. Partial gas or liquid or gas-liquid mixture in the liquid equalizing box can be guided out from the overflowing hole through the arrangement of the overflowing hole, the backflow phenomenon caused when the falling flow speed of the liquid equalizing hole is lower than the air inlet speed is prevented, and the normal operation of the liquid equalizing box and the liquid distributing box is ensured.
Preferably, the first and second electrodes are formed of a metal,
the overflowing holes 12 are multiple and distributed in the horizontal direction; and/or the liquid homogenizing box 1 is of a prismoid structure with a trapezoidal longitudinal section or a circular truncated cone structure with a trapezoidal longitudinal section. This is the utility model discloses a preferred structural style of overflowing the orifice, a plurality of overflowing orifices can be derived the partial gas or liquid or gas-liquid mixture in the equal liquid box on the horizontal direction, and the area is derived in the increase, and equal liquid box is prismatic table structure or round platform structure for its preferred structural style.
Preferably, the first and second electrodes are formed of a metal,
the sum of the sectional areas of the overflowing holes 12 is larger than the gas inlet sectional area of the liquid inlet pipe 2. The sum of the sectional areas of the overflowing holes 12 is larger than the sectional area of the air inlet of the liquid inlet pipe 2, so that the situation that the liquid distributing holes are provided with liquid films and the liquid can be led out from the overflowing holes when the liquid cannot be distributed evenly can be effectively prevented, and the uniform action of the liquid distributing box is guaranteed to be normally carried out.
Preferably, the first and second electrodes are formed of a metal,
the height of the liquid homogenizing box in the longitudinal section and the trapezoid section is H, the width of the upper end is A, the width of the lower end is B, and B/A is equal to (0.7-0.9). This is the utility model discloses a preferred size relation of trapezoidal homocline box sets up the width from top to bottom to be (0.7 ~ 0.9), can effectively guarantee the height of liquid level in the trapezoidal box when guaranteeing effectively to fall down the fluid and homocline, guarantees sufficient down pressure and promotes fluid evenly distributed, improves evenly distributed fluidic effect.
Preferably, the first and second electrodes are formed of a metal,
the liquid distributing box 3 is sleeved outside the liquid homogenizing box 1, and the liquid homogenizing hole 11 of the liquid homogenizing box 1 is communicated with the inside of the liquid distributing box 3; and a plurality of liquid distribution holes are also arranged on the lower end surface of the liquid distribution box 3 and communicated with the inside of the liquid distribution box 3. Gaseous refrigerant enters the liquid distributor through the air inlet, flows into the lower-layer liquid distribution box (square liquid distribution box) after being subjected to liquid distribution by the trapezoidal liquid distribution box, is uniformly distributed in the pipe distribution area in the heat exchanger after being subjected to liquid distribution again, can form a secondary liquid distribution effect, and gas produced in the high-efficiency heat exchange area flows out of the evaporation working condition air outlet along the shell wall through the flow channel.
The liquid distributor sets up two-layer equal liquid board, and the first layer is trapezoidal equal liquid box (last), and the second floor is square equal liquid box (down, cloth liquid box 3 promptly), through the secondary after equal liquid effectually with gaseous refrigerant equipartition in the stringing region, make the heat exchange tube in the unit length obtain make full use of, prevent the heat transfer blind spot, improve heat transfer capacity.
Preferably, the first and second electrodes are formed of a metal,
the side surface of the liquid distribution box 3 is also provided with at least one air passing hole which is communicated with the inside of the liquid distribution box 3; and/or the longitudinal section of the liquid distribution box 3 is of a square structure. Partial gas or liquid or gas-liquid mixture in the liquid distribution box can be led out from the air passing hole through the air passing hole, the phenomenon of backflow caused when the falling flow speed of the liquid distribution hole is lower than the air inlet speed is prevented, and the normal operation of the liquid distribution box is ensured.
The utility model also provides a falling film heat exchanger, it includes preceding arbitrary liquid distributor. The utility model discloses a set up a homocline box, set up a plurality of homocline holes on its lower terminal surface, can carry out the effect of homocline to liquid or gas-liquid mixture that gets into from the feed liquor pipe, and set up the homocline box into big end down's trapezoidal cross-sectional shape, can effectively reduce the width of upper end under the condition of equal lower extreme width compared with square box, and then effectively increase the liquid level height in the homocline box, thereby increase the gravitational potential energy in the homocline box, increase fluid pressure, can effectively control the flow of refrigerant through this pressure, overcome the defect that the refrigerant can't evenly distribute because of the stopping of liquid distributor, make the refrigerant can be pushed down to the heat exchange tube evenly, make it can evenly distribute on the heat exchange tube, and the ladder-shaped structure of expanding downwards can also form the water conservancy diversion effectively, further promoted the homocline effect, the uniform distribution effect is increased, and the problem that the gaseous refrigerant of the air inlet can not be fully contacted with the heat exchange tube is solved.
The utility model also provides an air conditioner, it includes preceding arbitrary liquid distributor or aforementioned falling film heat exchanger. The utility model discloses improve the liquid distributor structure, design trapezoidal samming box, promote liquid level height in the samming box, through the gaseous state refrigerant equipartition direction stringing region that trapezoidal samming box will get into the heat exchanger, ensure gaseous state refrigerant and the abundant contact in heat exchange tube surface, reach and promote heat exchanger condensation effect.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A liquid distributor is characterized in that: the method comprises the following steps:
the liquid homogenizing box comprises a liquid homogenizing box (1), wherein a liquid inlet pipe (2) is arranged at the upper end of the liquid homogenizing box (1) in a communicated mode, a plurality of liquid homogenizing holes (11) are formed in the lower end face of the liquid homogenizing box (1), the liquid homogenizing holes (11) are communicated with the inside of the liquid homogenizing box (1), and the liquid homogenizing box (1) is in a trapezoid cross section shape which is small in upper portion and large in lower portion.
2. The liquid distributor according to claim 1, characterized in that:
the sum of the sectional areas of the liquid homogenizing holes (11) is in the range of 20-40% of the sectional area of the gas inlet of the liquid inlet pipe (2).
3. The liquid distributor according to claim 1 or 2, characterized in that:
at least one overflowing hole (12) is further formed in the side edge of the liquid equalizing box (1), and the overflowing hole (12) is communicated with the inside of the liquid equalizing box (1).
4. The liquid distributor according to claim 3, characterized in that:
the overflowing holes (12) are multiple and distributed in the horizontal direction; and/or the liquid homogenizing box (1) is of a prismoid structure with a trapezoidal longitudinal section or a circular truncated cone structure with a trapezoidal longitudinal section.
5. The liquid distributor according to claim 3, characterized in that:
the sum of the sectional areas of the overflowing holes (12) is larger than the sectional area of the gas inlet of the liquid inlet pipe (2).
6. The liquid distributor according to any one of claims 1-2, characterized in that:
the height of the liquid homogenizing box in the longitudinal section and the trapezoid section is H, the width of the upper end is A, the width of the lower end is B, and B/A is equal to (0.7-0.9).
7. The liquid distributor according to any one of claims 1-2, characterized in that:
the liquid distributing box (3) is sleeved outside the liquid homogenizing box (1), and a liquid homogenizing hole (11) of the liquid homogenizing box (1) is communicated with the inside of the liquid distributing box (3); and a plurality of liquid distribution holes are also arranged on the lower end face of the liquid distribution box (3), and the liquid distribution holes are communicated with the inside of the liquid distribution box (3).
8. The liquid distributor according to claim 7, characterized in that:
the side surface of the liquid distribution box (3) is also provided with at least one air passing hole which is communicated with the inside of the liquid distribution box (3); and/or the longitudinal section of the liquid distribution box (3) is of a square structure.
9. A falling film heat exchanger is characterized in that: comprising the dispenser of any one of claims 1-8.
10. An air conditioner, characterized in that: comprising the liquid distributor according to any one of claims 1 to 8 or the falling film heat exchanger according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202725.XU CN211345943U (en) | 2019-12-10 | 2019-12-10 | Liquid distributor, falling film heat exchanger and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202725.XU CN211345943U (en) | 2019-12-10 | 2019-12-10 | Liquid distributor, falling film heat exchanger and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN211345943U true CN211345943U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922202725.XU Active CN211345943U (en) | 2019-12-10 | 2019-12-10 | Liquid distributor, falling film heat exchanger and air conditioner |
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| Country | Link |
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| CN (1) | CN211345943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944744A (en) * | 2019-12-10 | 2021-06-11 | 珠海格力电器股份有限公司 | Liquid distributor, falling film heat exchanger and air conditioner |
| CN113154724A (en) * | 2021-04-13 | 2021-07-23 | 上海应用技术大学 | Falling film evaporator |
-
2019
- 2019-12-10 CN CN201922202725.XU patent/CN211345943U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944744A (en) * | 2019-12-10 | 2021-06-11 | 珠海格力电器股份有限公司 | Liquid distributor, falling film heat exchanger and air conditioner |
| CN112944744B (en) * | 2019-12-10 | 2024-07-09 | 珠海格力电器股份有限公司 | Liquid distributor, falling film heat exchanger and air conditioner |
| CN113154724A (en) * | 2021-04-13 | 2021-07-23 | 上海应用技术大学 | Falling film evaporator |
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