CN216717131U - Defrosting device of fin heat exchanger - Google Patents
Defrosting device of fin heat exchanger Download PDFInfo
- Publication number
- CN216717131U CN216717131U CN202123374998.6U CN202123374998U CN216717131U CN 216717131 U CN216717131 U CN 216717131U CN 202123374998 U CN202123374998 U CN 202123374998U CN 216717131 U CN216717131 U CN 216717131U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- defrosting
- exchanger body
- water
- protective shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000007788 liquid Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000003570 air Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Images
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model is suitable for the technical field of auxiliary defrosting equipment of heat exchangers, and provides a defrosting device of a fin heat exchanger, which comprises a heat exchanger body, wherein a protective shell is arranged on the outer side of the heat exchanger body; the defrosting device is characterized in that a defrosting mechanism is arranged in the protective shell and comprises a telescopic rod and a spray head assembly located below the telescopic rod, a differential pressure gauge connected with the defrosting mechanism is arranged on the protective shell, and the two ends of the differential pressure gauge are respectively connected with the internal pressure of the heat exchanger body and the external pressure of the heat exchanger body. Therefore, the defrosting mechanism is arranged in the heat exchanger body, and the pressure difference between the inner pressure and the outer pressure is detected by using the pressure difference meter, so that the working time of the defrosting mechanism is determined, and the aim of quickly removing the frost layer covered on the heat exchanger body is fulfilled.
Description
Technical Field
The utility model relates to the technical field of heat exchanger defrosting auxiliary equipment, in particular to a defrosting device of a fin heat exchanger.
Background
In the present day that human energy is increasingly tense, the use of air source heat pump is becoming mainstream gradually, and air source heat pump is a kind of heat that transfers the heat in the air to the place that needs the heat supply through heat pump technology, reaches the heating purpose. In operation, no pollutants are emitted to the environment. When ambient temperature is lower, the unit need reduce the fin temperature and come and carry out the heat transfer with ambient air, and when the fin temperature was less than ambient temperature's dew point temperature, the vapor that contains in the air through the fin surface, will condense and become the frost even, worsens heat exchange efficiency. Therefore, the defrosting is needed after the finned heat exchanger is frosted to a certain degree, so that the unit can be operated at high efficiency.
In the air source heat pump heating process, when the ambient temperature is lower, when humid air contacts the fins with the temperature lower than the dew point temperature, frost layers are inevitably formed on the surfaces of the fin heat exchangers, and along with the increase of the operation time, the frost layers on the surfaces are thicker and thicker, so that a unit is influenced to absorb heat from the environment, and the operation efficiency is reduced. The conventional defrosting conditions include commands such as defrosting interval, temperature difference between ring temperature and fin temperature and the like, but the existing commands cannot judge whether the fan is overloaded or not, and if the fan is overloaded, the unit does not enter a defrosting state, but the fan is overloaded and protected to stop due to overlarge resistance. This is novel can realize utilizing the inside and outside pressure differential of unit to get into the defrosting instruction, makes the unit can not shut down because of the fan overload of fin heat exchanger surface frost layer super thick resistance grow in the operation process.
There are many defrosting methods, in which the defrosting effect is most obvious in a short time by using circulating hot air, and in order to improve the defrosting efficiency, water is sprayed to the outer surface of the heat exchanger by using a water spraying device to melt and flush the frost layer by the heat of water. The water defrosting is suitable for a direct expansion type air cooler refrigerating system. Generally, the defrosting method is combined with hot gas bypass defrosting, and is only suitable for the conditions that the frosting speed of an air cooler is slow and a frost layer is thin when the defrosting method is used alone. The water-washed defrosting effect is better than the hot gas bypass defrosting effect, and the water-washed defrosting method is short in time, simple to operate and convenient to manage. However, the oil stain in the heat exchanger pipeline cannot be discharged by using the method, and the water consumption is large, so the application range of the heat exchanger is only limited to the air cooler with the water drainage pipeline.
The heat exchanger is large in size, is directly washed by water, has large demand on water quantity, and can freeze a water-blowing disc if not discharged in time.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, an object of the present invention is to provide a defrosting apparatus for a fin heat exchanger, in which a defrosting mechanism is disposed in a heat exchanger body, and a differential pressure gauge is used to detect a difference between an internal pressure and an external pressure, so as to determine an operating time of the defrosting mechanism, thereby achieving a purpose of quickly removing a frost layer covering the heat exchanger body.
In order to achieve the purpose, the utility model provides a defrosting device of a fin heat exchanger, which comprises a heat exchanger body, wherein a protective shell is arranged on the outer side of the heat exchanger body; the defrosting device is characterized in that a defrosting mechanism is arranged in the protective shell and comprises a telescopic rod and a spray head assembly located below the telescopic rod, a differential pressure gauge connected with the defrosting mechanism is arranged on the protective shell, and the two ends of the differential pressure gauge are respectively connected with the internal pressure of the heat exchanger body and the external pressure of the heat exchanger body.
According to the finned heat exchanger defrosting device, the heat exchanger body is a finned heat exchanger, and the lower end of the finned heat exchanger is provided with the water tray.
According to the defrosting device of the fin heat exchanger, the fin heat exchanger is V-shaped, and a plurality of heat dissipation copper pipes penetrate through the middle part of the fin heat exchanger.
According to the finned heat exchanger defrosting device, the telescopic rod is an electric telescopic rod, and the end face of the spray head assembly and the driving telescopic rod form an included angle of 45 degrees.
According to the finned heat exchanger defrosting device, the water disc is connected with the defrosting mechanism through the circulating water pipe and the water pump, and the circulating water pipe is embedded in the protective shell.
According to the finned heat exchanger defrosting device, the upper end of the telescopic rod is further connected with the sliding rail, and the telescopic rod is connected with the sliding rail through the roller assembly.
According to the finned heat exchanger defrosting device, the water tray is also internally provided with a liquid level sensor, and the liquid level sensor is connected with a drainage system of the water tray through a timer.
The utility model provides a defrosting device of a fin heat exchanger, which comprises a heat exchanger body, wherein a protective shell is arranged on the outer side of the heat exchanger body; in the protective shell, the heat exchanger body realizes heat exchange. The heat exchange body can adopt fin heat exchange, the working principle is that the heat of a high-temperature side medium is poured into a low-temperature side medium from a primary surface, and partial heat is also transferred along the height direction of the fin surface, namely, the heat is poured into the fin along the height direction of the fin by a partition plate, and then the heat is convectively transferred to the low-temperature side medium. Due to the large amount of heat exchange, frost is inevitably formed on the heat exchanger body. The defrosting device is characterized in that a defrosting mechanism is arranged in the protective shell and comprises a telescopic rod and a spray head assembly located below the telescopic rod, a differential pressure gauge connected with the defrosting mechanism is arranged on the protective shell, and the two ends of the differential pressure gauge are respectively connected with the internal pressure of the heat exchanger body and the external pressure of the heat exchanger body. If the frost layer is too thick, the heat exchange efficiency can be seriously influenced, when the differential pressure meter displays large differential pressure, the defrosting mechanism is opened, and the telescopic rod and the spray head component are used for spraying water flow to quickly melt the frost layer on the heat exchanger body.
Drawings
FIG. 1 is a schematic front internal view of the present invention;
FIG. 2 is a side view of the present invention;
in the context of the figures, it is,
1-heat exchanger body, 11-protective shell, 12-differential pressure gauge, 13-water tray, 131-liquid level sensor,
2-a defrosting mechanism; 21-a water pump, 22-a telescopic rod, 23-a spray head, 24-a sliding track and 25-a circulating water pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1-2, the utility model provides a defrosting device for a fin heat exchanger, which comprises a heat exchanger body 1, wherein a protective shell 11 is arranged on the outer side of the heat exchanger body 1; in the protective housing 11, the medium exchanges heat on the heat exchanger body 1. The general heat exchanger body 1 can adopt a plate heat exchanger or a fin heat exchanger, and the working principle of the fin heat exchanger is that heat of a high-temperature side medium is poured into a low-temperature side medium from a primary surface, and partial heat is transferred along the height direction of the fin surface, namely, heat is poured into the fin along the height direction of the fin by a partition plate, and then the heat is convectively transferred to the low-temperature side medium. Due to the large amount of heat exchange, frost is inevitably present on the heat exchanger body 1. Be equipped with defrosting mechanism 2 in the protecting crust 11, defrosting mechanism 2 includes telescopic link 22 and the shower nozzle subassembly 23 that is located telescopic link 22 below, is equipped with the differential pressure gauge 12 of connecting defrosting mechanism 2 on the protecting crust 11, and 1 internal pressure of heat exchanger body and 1 external pressure of heat exchanger body are connected respectively to differential pressure gauge 12 both ends. If the frost layer is too thick, the heat exchange efficiency is seriously influenced, and when the differential pressure meter 12 shows that the differential pressure is large, the defrosting mechanism 2 is manually opened, and the telescopic rod 22 and the spray head assembly 23 are used for spraying water flow to quickly ablate the frost layer on the heat exchanger body 1. In the actual operation process, a sensor can be arranged on the differential pressure gauge 12, the sensor detects the numerical value of the differential pressure gauge, and the control system is used for controlling the automatic action of the defrosting mechanism 2.
Preferably, the heat exchanger body 1 of the present invention is a fin heat exchanger, and a water tray 13 is disposed at the lower end of the fin heat exchanger. When the water-cooled type heat exchanger works, a certain amount of warm water is stored in the water tray 13, the water temperature is generally set to be about 25 degrees, water is sprayed to the end face of the heat exchanger body 1 from the spray head assembly 23 through the circulating water pipe 25 and the water pump 21, and water flow after defrosting is finished enters the water tray 13 again.
In addition, the finned heat exchanger is V-shaped, and a plurality of heat dissipation copper pipes penetrate through the middle of the finned heat exchanger. The heat exchanger body 1 has various shapes, a V-shaped fin heat exchanger is generally preferred, and a plurality of radiating fins are connected in series by utilizing copper pipes with better heat conductivity to form more space so as to improve the heat exchange efficiency.
Furthermore, the telescopic rod 22 of the present invention is an electric telescopic rod 22, and the end surface of the nozzle assembly 23 and the driving telescopic rod 22 form an included angle of 45 °. The electric telescopic rod 22 can drive the spray head assembly 23 to move up and down, and the roller assembly can drive the electric telescopic rod 22 to reciprocate left and right in the sliding rail 24, so that defrosting of all positions in the heat exchanger body 1 is realized. If necessary, the nozzle assembly can be used to treat impurities such as lint adhered to the heat exchanger body 1.
Preferably, the water tray 13 of the present invention is connected to the defrosting mechanism 2 through a circulating water pipe 25 and a water pump 21, and the circulating water pipe 25 is embedded in the protective shell 11. To reduce the occupied volume, the circulating water pipe 25 is typically embedded in the protective shell 11, and the volume of the water tray 13 cannot be too large to reduce splashing.
In addition, in the practical use process, the water tray 13 of the present invention is further provided with a liquid level sensor 131, and the liquid level sensor 131 is connected with a drainage system of the water tray 13 through a timer. When water is used for defrosting, great care is taken to prevent the water splashing of the air cooler and the water overflowing phenomenon of the water tray 13. The water tray 13 of the floor type air cooler should keep a certain overhead distance with the ground, and meanwhile, the empty layer of the frame must be kept free of water so as to avoid freezing the water tray 13. By providing the level sensor 131, it is possible to reduce the overflow phenomenon of the water tray 13 and to quickly empty the water tray 13 after defrosting is completed.
Before the defrosting mechanism 2 is used, the liquid supply valve of the air cooler to be defrosted is closed 0.5h ahead of time, and the air return valve of the air cooler is slightly opened. The special defrosting water pump 21 is started, water with the temperature of about 25 ℃ is pumped to the upper part of the air cooler pipe bank, and water defrosting is carried out on the heat exchanger body 1.
Meanwhile, the single-stage refrigeration compressor is started to suck return air of the heat exchanger body, so that the pressure of the heat exchanger body 1 is not too high. When the frost layer is melted, the operation of the head assembly 23 is stopped. When no water drops exist on the outer wall of the cooling calandria and the pressure in the cooling calandria is equal to the low-pressure return air pressure, the liquid supply valve and the air return valve can be properly opened, and the air cooler is started to recover the normal work of the cold room.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (7)
1. The defrosting device of the fin heat exchanger is characterized by comprising a heat exchanger body, wherein a protective shell is arranged on the outer side of the heat exchanger body;
a defrosting mechanism is arranged in the protective shell, the defrosting mechanism comprises a telescopic rod and a spray head assembly positioned below the telescopic rod,
and the protective shell is provided with a differential pressure gauge connected with the defrosting mechanism, and two ends of the differential pressure gauge are respectively connected with the internal pressure of the heat exchanger body and the external pressure of the heat exchanger body.
2. The finned heat exchanger defrosting apparatus of claim 1 wherein the heat exchanger body is a finned heat exchanger, and a water pan is provided at the lower end of the finned heat exchanger.
3. The finned heat exchanger defrosting apparatus of claim 2 wherein the finned heat exchanger is V-shaped, and a plurality of heat dissipating copper tubes are inserted through the middle of the finned heat exchanger.
4. The finned heat exchanger defrosting device of claim 1 wherein the telescoping rod is an electrically operated telescoping rod, and the end face of the spray head assembly is at a 45 ° angle to the drive telescoping rod.
5. The finned heat exchanger defrosting device of claim 2 wherein the water pan is connected to the defrosting mechanism through a circulating water pipe and a water pump, the circulating water pipe is embedded in the protective shell, and the water pump is a defrosting water pump.
6. The finned heat exchanger defrosting apparatus of claim 4 wherein a sliding rail is further connected to the upper end of the telescoping rod, and the telescoping rod is connected to the sliding rail via a roller assembly.
7. The finned heat exchanger defroster according to claim 2, wherein a liquid level sensor is further provided in the water tray, and the liquid level sensor is connected to a drain system of the water tray through a timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374998.6U CN216717131U (en) | 2021-12-29 | 2021-12-29 | Defrosting device of fin heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374998.6U CN216717131U (en) | 2021-12-29 | 2021-12-29 | Defrosting device of fin heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216717131U true CN216717131U (en) | 2022-06-10 |
Family
ID=81887562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123374998.6U Active CN216717131U (en) | 2021-12-29 | 2021-12-29 | Defrosting device of fin heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216717131U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026081A (en) * | 2023-03-29 | 2023-04-28 | 北京星宇环试科技有限公司 | Ultralow temperature device suitable for nonflammable mixed refrigerant |
-
2021
- 2021-12-29 CN CN202123374998.6U patent/CN216717131U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026081A (en) * | 2023-03-29 | 2023-04-28 | 北京星宇环试科技有限公司 | Ultralow temperature device suitable for nonflammable mixed refrigerant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101634476B (en) | Closed evaporation cooling high-temperature cold water unit | |
| CN201852342U (en) | Wet curtain evaporative cooling air-cooled condensing unit | |
| CN108826536A (en) | The air conditioner unit of not stopping function is heated with defrosting | |
| CN105299987A (en) | Air source heat pump sprinkling defrosting device based on super-hydrophobic finned tube exchanger | |
| CN103940164B (en) | A kind of solution spraying formula Frostless air-source heat pump device | |
| CN110006165B (en) | Protection device and protection method for low-temperature defrosting and high-temperature prevention and air conditioner | |
| CN106091076A (en) | A kind of heat source tower heat pump using salt-free formula external auxiliary heating frosting-proof device | |
| CN105716329B (en) | Direct expanding solar heating pump system | |
| CN110173938B (en) | Anti-freezing device for industrial water chiller | |
| CN104110920A (en) | Air-source heat pump system for recycling waste heat of compressor | |
| CN216717131U (en) | Defrosting device of fin heat exchanger | |
| CN203785152U (en) | Evaporation and condensation type heating and cooling air conditioner | |
| CN105020815B (en) | A kind of evaporating condensation type air conditioner | |
| CN110726271A (en) | Efficient chassis icing-resistant finned heat exchanger and working method thereof | |
| CN102445036A (en) | Ice making machine | |
| CN101338958B (en) | Air conditioner heat exchange type condensator and spray evaporative cooling system | |
| CN106440519A (en) | Heating air source heat pump system with supercooling circuit | |
| TW201009274A (en) | Condenser and metering device in refrigeration system for saving energy | |
| CN105318461A (en) | Open-closed difunctional heat-source tower | |
| CN212253004U (en) | Two-stage indirect evaporative cooling air conditioning unit | |
| CN108332321A (en) | A kind of phase-change energy storage device | |
| CN206709435U (en) | The air-cooled one-piece type refrigeration unit of water cooling | |
| CN206300381U (en) | Heating air source heat pump system with cold loop is crossed | |
| CN102679636B (en) | Phase-change energy-storage evaporative condenser | |
| CN102003836B (en) | Low-temperature water source heat pump unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266000 Patentee after: Qingdao Aolikai Energy Co.,Ltd. Address before: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266000 Patentee before: QINGDAO ALKKT CENTRAL AIR CONDITIONER CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |