CN204153919U - A kind of fresh air heater defroster - Google Patents
A kind of fresh air heater defroster Download PDFInfo
- Publication number
- CN204153919U CN204153919U CN201420506918.9U CN201420506918U CN204153919U CN 204153919 U CN204153919 U CN 204153919U CN 201420506918 U CN201420506918 U CN 201420506918U CN 204153919 U CN204153919 U CN 204153919U
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- water
- fresh air
- air heater
- electric
- temperature sensor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 230000001105 regulatory effect Effects 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 description 7
- 230000002528 anti-freeze Effects 0.000 description 5
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- Air-Conditioning For Vehicles (AREA)
Abstract
The utility model discloses structure simple, the fresh air heater defroster that constant flow runs under fresh air heater nominal situation can be ensured, comprise entrance Electric air valve in the air channel that is arranged on and is communicated with outdoor and hot-water coil pipe fresh air heater and blower fan, the air outlet of entrance Electric air valve is provided with new air temperature sensor, the air outlet of blower fan is provided with wind pushing temperature sensor, the water inlet pipe of hot-water coil pipe fresh air heater is communicated with the oral siphon of external water source by electric three-way regulating valves, return water temperature sensor is provided with in the return pipe of hot-water coil pipe fresh air heater, return pipe is communicated with the water inlet of multifunctional pump, a delivery port of multifunctional pump is communicated with electric three-way regulating valves by check-valves, another delivery port is communicated with the return pipe of external water source, entrance Electric air valve, new air temperature sensor, wind pushing temperature sensor, return water temperature sensor, electric three-way regulating valves and multifunctional pump are electrically connected with controller respectively.
Description
Technical field
The utility model relates to the equipment technical field for heating clamber outer air, refers to a kind of fresh air heater defroster particularly.
Background technology
Winter, fresh air heater carried out type selecting by design conditions, was configured with corresponding weight adjustment device simultaneously, to adapt to outdoor climate complicated and changeable.The mode of Load Regulation all adopts at present and arranges electric control valve to realize on heat medium water pipeline.No matter adopting three-way control valve or two-way control valve, is in fact all the control realizing its heat exchange amount by changing the heat medium water flow entering heater.
When outdoor temperature and air mass flow certain, the temperature of heat medium water and flow are the keys of anti-freeze design, during actual motion, coil frost broken often not occurs between the most algid stage close to design conditions, but just entering the period in winter, although now outdoor temperature does not have design conditions so low, below 0 DEG C yet.Because outdoor temperature is higher than design conditions, fresh air heater will carry out load down adjustment, turn down the aperture of electric control valve, discharge in coil pipe is reduced, flow velocity reduces, when the laminar sublayer of heat medium water in coil pipe is too thick, when being in laminar condition even completely, freezing accident just inevitably there occurs.Also have a kind of accident situation, heat medium water stops confession suddenly because of fault, and when especially occurring in night, now outdoor temperature is low, and fresh air heater blower fan runs as usual, and in heater, heat medium water stops flowing, and temperature declines rapidly and freezes.According to fluid mechanics principle, fluid mainly contains two kinds of fluidised forms, i.e. laminar flow and turbulent flow.When fluidised form is in laminar condition, the heat transfer between fluid will be in heat transfer state, and the heat transfer between the fluid of turbulent condition is in heat convection state, and heat conducting heat-transfer intensity is far below heat convection.In fact in pipeline, the velocity flow profile situation of heat medium water is along pipeline section parabolically state, circular pipe center flow velocity is high, lower the closer to tube wall flow velocity, even if be therefore in the fluid of turbulent condition, also having laminar sublayer to exist near inside pipe wall place, its thickness increases along with the reduction of flow velocity, and this just makes the heat-transfer intensity of fluid between pipeline center and tube wall greatly reduce, thus defining very large thermograde, the fluid temperature (F.T.) of close tube wall is far below tube hub temperature.
Fresh air heater heat exchanger tube contacts with less than 0 DEG C air for a long time, when Load Regulation causes heat exchange velocity in pipes too low, if when heat medium water temperature is high again, hot water in pipeline is long-time carries out heat exchange with outdoor Cryogenic air, water temperature near tube wall has dropped to rapidly less than 0 DEG C, gradually forming the thin ice sheet of one deck near tube wall place, As time goes on, ice sheet constantly expands and thickens, and water flow section diminishes, and current are more not smooth, heat exchange worsens further, heat exchanger tube all freezes, and then expands to whole heater, final heater fully charge, bursting by freezing.
Summary of the invention
In order to solve in above-mentioned existing background technology existing problem, the utility model provide structure simple, a kind of fresh air heater defroster that constant flow runs under fresh air heater nominal situation can be ensured.
For achieving the above object, a kind of fresh air heater defroster designed by the utility model, comprise entrance Electric air valve in the air channel that is arranged on and is communicated with outdoor and hot-water coil pipe fresh air heater and blower fan, the air outlet of described entrance Electric air valve is provided with new air temperature sensor, the air outlet of described blower fan is provided with wind pushing temperature sensor, its special character is, the water inlet pipe of described hot-water coil pipe fresh air heater is communicated with the oral siphon of external water source by electric three-way regulating valves, return water temperature sensor is provided with in the return pipe of described hot-water coil pipe fresh air heater, described return pipe is communicated with the water inlet of multifunctional pump, a delivery port of described multifunctional pump is communicated with electric three-way regulating valves by check-valves, another delivery port is communicated with the return pipe of external water source, described entrance Electric air valve, new air temperature sensor, wind pushing temperature sensor, return water temperature sensor, electric three-way regulating valves and multifunctional pump are electrically connected with controller respectively.
Further, new wind filter between described entrance Electric air valve and hot-water coil pipe fresh air heater, for removing the dust in the outdoor air that is blown into from entrance Electric air valve.
Further, between the water inlet of described electric three-way regulating valves and the oral siphon of external water source, be provided with water filter, for removing the impurity in the water that flows into from external water source oral siphon.
Further, in the water inlet pipe of described hot-water coil pipe fresh air heater and return pipe, be equipped with thermometer and pressure gauge, for observing temperature and the pressure of heat medium water in the water inlet pipe of hot-water coil pipe fresh air heater and return pipe.
Further, between described electric three-way regulating valves and the oral siphon of external water source and between the delivery port of described multifunctional pump and the return pipe of external water source, all hand-operated valve is set, circulates for the heat medium water of this device of manual-lock with external water source.
A kind of fresh air heater defroster designed by the utility model, by arranging multifunctional pump at return pipe, under both having ensure that fresh air heater nominal situation, constant flow ran, and doublely can do again the Inner eycle power under accident condition; Return pipe set temperature sensor and corresponding interlocked control measure, effectively prevent water temperature too low, thus make the flow velocity of heat medium water in new blower fan heater and temperature two aspects all obtain reliable guarantee, solve the antifreeze problem of fresh air heater under various operating mode, avoid heater coil to damage because of bursting by freezing, even break and leak and the second accident caused.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of fresh air heater defroster of the utility model.
In figure: 1. entrance Electric air valve, 2. new air temperature sensor, 3. new wind filter, 4. hot-water coil pipe fresh air heater, 5. blower fan, 6. wind pushing temperature sensor, 7. controller, 8. return water temperature sensor, 9. thermometer, 10. pressure gauge, 11. electric three-way regulating valves, 12. water filters, 13. hand-operated valves, 14. multifunctional pumps, 15. check-valves, 16. water inlet pipes, 17. return pipes.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
A kind of fresh air heater defroster of the utility model as shown in Figure 1, comprise entrance Electric air valve 1 in the air channel that is arranged on and is communicated with outdoor and hot-water coil pipe fresh air heater 4 and blower fan 5, the air outlet of entrance Electric air valve 1 is provided with new air temperature sensor 2, new wind filter 3 between entrance Electric air valve 1 and hot-water coil pipe fresh air heater 4.The air outlet of blower fan 5 is provided with wind pushing temperature sensor 6, it is characterized in that: the water inlet pipe 16 of hot-water coil pipe fresh air heater 4 is communicated with the oral siphon of external water source by electric three-way regulating valves 11, is provided with water filter 12 between the water inlet of electric three-way regulating valves 11 and the oral siphon of external water source.Return water temperature sensor 8 is provided with in the return pipe 17 of hot-water coil pipe fresh air heater 4, return pipe 17 is communicated with the water inlet of multifunctional pump 14, a delivery port of multifunctional pump 14 is communicated with electric three-way regulating valves 11 by check-valves 15, another delivery port is communicated with the return pipe of external water source, and entrance Electric air valve 1, new air temperature sensor 2, wind pushing temperature sensor 6, return water temperature sensor 8, electric three-way regulating valves 11 and multifunctional pump 14 are electrically connected with controller 7 respectively.
In the water inlet pipe 16 of hot-water coil pipe fresh air heater 4 and return pipe 17, between electric three-way regulating valves 11 and the oral siphon of external water source and between the delivery port of multifunctional pump 14 and the return pipe of external water source, be equipped with thermometer 9 and pressure gauge 10.Water inlet, the delivery port of multifunctional pump 14, between electric three-way regulating valves 11 and the oral siphon of external water source and between the delivery port of multifunctional pump 14 and the return pipe of external water source, hand-operated valve 13 is all set.
The utility model changes the Load Regulation mode of fresh air heater, devises a kind of novel defroster.Operation principle of the present utility model is as follows: when new air temperature sensor 2 detects that the outside air temperature sucked from entrance Electric air valve 1 is not more than design conditions, multifunctional pump 14 is closed, and the heat medium water temperature entering hot-water coil pipe fresh air heater 4 is consistent with system water supply temperature.
When new air temperature sensor 2 detects that the outside air temperature sucked from entrance Electric air valve 1 is greater than design conditions, thermic load reduces operation at part load, the temperature of now wind pushing temperature sensor 6 detection is higher than design temperature, regulate electric T-shaped valve 11, reduce the high-temperature water output of the water inlet A that electric three-way regulating valves 11 is connected with the oral siphon of external water source, open the water inlet B between electric three-way regulating valves 11 and multifunctional pump 14, open multifunctional pump 14, the backwater of part hot-water coil pipe fresh air heater 4 is made to enter electric three-way regulating valves 11 by check-valves 15, realize the mixed water supplied water with high temperature, temperature enters the water inlet pipe 16 of hot-water coil pipe fresh air heater 4 again after reducing.Because multifunctional pump 14 is constant flows, the heat medium water flow flowing through hot-water coil pipe fresh air heater 4 water inlet pipe 16 is constant all the time, change be the heat medium water temperature entering hot-water coil pipe fresh air heater 4, avoid because flow velocity is too low and freeze.
When hot-water coil pipe fresh air heater 4 is in shutdown stand-by state, now blower fan 5 and entrance Electric air valve 1 are closed, and open the antifreeze operation of multifunctional pump 14.The water inlet A mouth that electric three-way regulating valves 11 is connected with the oral siphon of external water source is crack, and the water inlet B major part between multifunctional pump 14 is opened, control return water temperature by regulating the aperture of water inlet A, water inlet B and be not less than design temperature of return water 10 DEG C, guarantee that heater is not frozen.
Accident situation, when return water temperature sensor 8 detects water temperature lower than design temperature of return water 10 DEG C, automatically enter antifreeze operating condition, now blower fan 5 and the chain closedown of entrance Electric air valve 1, the water inlet A complete shut-down water inlet B standard-sized sheet of electric three-way regulating valves 11 simultaneously, opens the antifreeze operation of multifunctional pump 14.
Other unspecified part is prior art.
Claims (5)
1. a fresh air heater defroster, comprise entrance Electric air valve (1) in the air channel that is arranged on and is communicated with outdoor and hot-water coil pipe fresh air heater (4) and blower fan (5), the air outlet of described entrance Electric air valve (1) is provided with new air temperature sensor (2), the air outlet of described blower fan (5) is provided with wind pushing temperature sensor (6), it is characterized in that: the water inlet pipe (16) of described hot-water coil pipe fresh air heater (4) is communicated with the oral siphon of external water source by electric three-way regulating valves (11), return water temperature sensor (8) is provided with in the return pipe (17) of described hot-water coil pipe fresh air heater (4), described return pipe (17) is communicated with the water inlet of multifunctional pump (14), a delivery port of described multifunctional pump (14) is communicated with electric three-way regulating valves (11) by check-valves (15), another delivery port is communicated with the return pipe of external water source, described entrance Electric air valve (1), new air temperature sensor (2), wind pushing temperature sensor (6), return water temperature sensor (8), electric three-way regulating valves (11) and multifunctional pump (14) are electrically connected with controller (7) respectively.
2. a kind of fresh air heater defroster according to claim 1, is characterized in that: new wind filter (3) between described entrance Electric air valve (1) and hot-water coil pipe fresh air heater (4).
3. a kind of fresh air heater defroster according to claim 1 and 2, is characterized in that: be provided with water filter (12) between the water inlet of described electric three-way regulating valves (11) and the oral siphon of external water source.
4. a kind of fresh air heater defroster according to claim 1 and 2, is characterized in that: be equipped with thermometer (9) and pressure gauge (10) in the water inlet pipe (16) of described hot-water coil pipe fresh air heater (4) and return pipe (17).
5. a kind of fresh air heater defroster according to claim 1 and 2, is characterized in that: all arrange hand-operated valve (13) between described electric three-way regulating valves (11) and the oral siphon of external water source and between the delivery port of described multifunctional pump (14) and the return pipe of external water source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506918.9U CN204153919U (en) | 2014-09-03 | 2014-09-03 | A kind of fresh air heater defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506918.9U CN204153919U (en) | 2014-09-03 | 2014-09-03 | A kind of fresh air heater defroster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204153919U true CN204153919U (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420506918.9U Expired - Lifetime CN204153919U (en) | 2014-09-03 | 2014-09-03 | A kind of fresh air heater defroster |
Country Status (1)
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| CN (1) | CN204153919U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319509A (en) * | 2019-07-16 | 2019-10-11 | 中国汽车工业工程有限公司 | A kind of air conditioner cold-heat water system constant flow matter adjustable type energy-saving control device |
| CN111426043A (en) * | 2020-03-16 | 2020-07-17 | 优刻得科技股份有限公司 | Fresh air handling unit prevents frostbite |
| CN113028589A (en) * | 2021-03-23 | 2021-06-25 | 江苏碳元绿色建筑科技有限公司 | Anti-freezing control method and control system of double-cold-source fresh air dehumidifier |
| CN114992838A (en) * | 2022-04-15 | 2022-09-02 | 广东申菱环境系统股份有限公司 | Anti-freezing device for fresh air gas-liquid heat exchanger and control method thereof |
-
2014
- 2014-09-03 CN CN201420506918.9U patent/CN204153919U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319509A (en) * | 2019-07-16 | 2019-10-11 | 中国汽车工业工程有限公司 | A kind of air conditioner cold-heat water system constant flow matter adjustable type energy-saving control device |
| CN111426043A (en) * | 2020-03-16 | 2020-07-17 | 优刻得科技股份有限公司 | Fresh air handling unit prevents frostbite |
| CN113028589A (en) * | 2021-03-23 | 2021-06-25 | 江苏碳元绿色建筑科技有限公司 | Anti-freezing control method and control system of double-cold-source fresh air dehumidifier |
| CN114992838A (en) * | 2022-04-15 | 2022-09-02 | 广东申菱环境系统股份有限公司 | Anti-freezing device for fresh air gas-liquid heat exchanger and control method thereof |
| CN114992838B (en) * | 2022-04-15 | 2024-03-19 | 广东申菱环境系统股份有限公司 | Full fresh air gas-liquid heat exchanger antifreezing device and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 430071 Wuchang District, Hubei, South Central Road No. two, No. 12, No. Patentee after: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING Group Corp. Address before: 430071 Power Engineering Company of Zhongnan Power Design Institute, 668 Democratic Road, Wuchang District, Hubei, Wuhan Patentee before: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING Group Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20150211 |