CN100462644C - Hot-air blower having artificial intelligence - Google Patents
Hot-air blower having artificial intelligence Download PDFInfo
- Publication number
- CN100462644C CN100462644C CNB2005800006613A CN200580000661A CN100462644C CN 100462644 C CN100462644 C CN 100462644C CN B2005800006613 A CNB2005800006613 A CN B2005800006613A CN 200580000661 A CN200580000661 A CN 200580000661A CN 100462644 C CN100462644 C CN 100462644C
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- Prior art keywords
- heater
- temperature
- fan
- indoor
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
- E03B7/10—Devices preventing bursting of pipes by freezing
- E03B7/12—Devices preventing bursting of pipes by freezing by preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/02—Casings; Cover lids; Ornamental panels
Abstract
Disclosed herein is a hot-air blower for supplying hot air in order to prevent freeze-rupture of a water pipe or the like. The hot-air blower is installed in the interior of a room. According to the present invention, at the state where the electric power is continuously supplied, the heater and the fan are intermittently operated in the operating state and also even at the interrupted state of operation. Therefore, the hot air can be efficiently supplied into the interior of a room to thereby prevent the freeze-rupture of the water pipe or the like. Accordingly, as compared with the conventional hot-air blower, which is operated over the whole wintertime to supply hot air, the electrical consumption can be considerably reduced, thereby providing a significant economical benefit. Furthermore, in the case where it is installed in the ceiling of the interior of a room, since the temperature of the interior of the room including the floor thereof can be precisely detected and hot air is supplied accordingly, the freeze-rupture of a water pipe installed in the floor can be prevented, dissimilar to the conventional technique.
Description
Technical field
The present invention relates to heater, relate in particular to the heater of electricity-saving type, it is installed in the indoor of the abominable toilet of room heater equipment etc. and supply warm braw in case antipriming pipe etc. freeze brokenly.
Background technology
General in the winter of cold, heating installation or the inadequate building of heat insulation construction take place with the accident that the office of sprinkler or running water that is located in the toilet of recreation ground etc. and pipe arrangement etc. freeze brokenly again and again such as being provided with fire prevention.Therefore, the indoor heater that supply hot gas is set such as in the toilet prevents freezing brokenly at the running water pipe in winter of cold.
But existing heater only the time is just measured indoor temperature and supply in operation and is prevented the hot gas that freezes brokenly.Therefore, when not starting because of gerentocratic carelessness, supply power supply again after having a power failure or can not supply when stopping and prevent the hot gas that freezes brokenly.So existing heater is starting always in the winter time, exist thus too much to consume electric power.There is uneconomic problem in existing like this technology.
Especially, because of being located at heater on the indoor ceiling and the distance between the indoor floor, can not fully measure the temperature around its indoor floor.That is, when being located at heater on the ceiling, because the ground plate temperature is lower than ceiling temp, so even indoor cold and warm air device can not start more yet.Therefore, because the indoor temperature difference is big, and can not realize that along the running water pipe and the running water of indoor floor setting the effect of warm braw and the accident of freezing brokenly frequently take place.
Summary of the invention
Therefore, for the problems referred to above that solve prior art the present invention has been proposed, the object of the present invention is to provide a kind of heater of economize on electricity, not only in the starting heater, and in out of service, also can accurately measure indoor temperature and supply hot gas so that running water pipe etc. can not freeze brokenly, and, after its starting is interrupted in order to reduce the temperature difference between floor and the ceiling, suction room air and improve the accuracy of temperature.
In order to realize as above-mentioned purpose, the invention provides a kind of heater, be used to supply with hot gas in case antipriming pipe etc. freeze brokenly, heater is installed in indoor, described heater comprises: the box that a) has the spatial accommodation of required size, described box is installed on indoor ceiling or the wall, thereby the one side is exposed to the outside; B) be installed in the above-mentioned box and be suitable for producing the heater of heat, be used for anti-antipriming pipe etc. and freeze brokenly; C) be installed near the fan of box internal heater, wherein, when heater work moves, fan form flow through heater and indoor air circulation indoor whereby hot gas is supplied to, even and wherein after the operation of heater is interrupted, fan is restarted operation independently room air is incorporated into the inside of box; D) be installed in the above-mentioned box and be suitable for surveying the temperature sensor that flow into the indoor air temperature in the above-mentioned box by said fans, described detecting temperature is as the judgment data that determines whether above-mentioned heater of starting operation and fan; E) be installed in the above-mentioned box and be suitable for forming the controller of circuit with above-mentioned heater, fan and temperature sensor, wherein at run duration, controller is according to the internal temperature control heater of temperature sensor detection and the startup/shutoff operation of fan, and its middle controller control heater in the operation of having no progeny, thereby temperature sensor is surveyed indoor temperature and is carried out the operation of restarting of heater and fan; F) be installed in cassette interior and be suitable for from the outside power suppling part to heater, fan, temperature sensor and controller power supply.
Preferably, at run duration, the operation of controller control heater and fan, thus compare with the first specific design temperature and indoor temperature is held with first design temperature and equates by the indoor temperature that temperature sensor is surveyed.Be in operation disconnected during, preferably, the operation operation of controller control heater and fan, thereby compared with the second and the 3rd design temperature and indoor temperature is maintained between the second and the 3rd design temperature by the indoor temperature that temperature sensor is surveyed, the second and the 3rd design temperature is set up as has the temperature difference.
In addition, controller is controlled the operation of restarting of fan, thereby after the operation of heater is interrupted and through a specific time durations, fan is restarted operation intermittently.
As above-mentioned, continue under the state of supply electricity at power supply according to the present invention, not only in starting operation, and also drive heater intermittently under the outage state and fan so that running water pipe etc. do not freeze brokenly, and to the indoor hot gas of supplying efficiently.So, with winter always starting operation and the existing heater of supplying hot gas compare, power consumption obviously reduces, and therefore obtains economic interests.And, also accurately measure when being arranged on the indoor ceiling and comprise the indoor temperature on floor and supply hot gas, therefore unlike the prior art, be located at running water pipe on the floor etc. and can not freeze brokenly.
Description of drawings
By understanding further purpose of the present invention and favourable part fully with reference to the detailed description that is associated with following accompanying drawing.
Fig. 1 is that heater according to the present invention is located at the state diagram on the indoor ceiling such as toilet.
Fig. 2 is according to heater circuit diagram of the present invention.
Fig. 3 is the flow chart according to the operation of heater of the present invention.
The specific embodiment
Below, with reference to accompanying drawing the preferred embodiments of the present invention following detailed description.
Fig. 1 is that heater according to the present invention is located at the state diagram on the indoor ceiling such as toilet, and Fig. 2 is according to heater circuit diagram of the present invention, and Fig. 3 is the flow chart according to heater starting method of the present invention.
As Fig. 1 and shown in Figure 2, heater according to the present invention is provided with effigurate box 10.Above-mentioned box 10 forms a certain size spatial accommodation in inside and is arranged on indoor ceiling such as toilet or the wall and expose externally the one side.Though not shown, the side of exposing of above-mentioned box 10 is provided with is used for the peristome that is communicated with between the inboard of box 10 and the outside.
Be provided with heater 20 in above-mentioned box 10 inside.Above-mentioned heater 20 is configured to produce the heat that freezes brokenly that is used to prevent running water pipe etc.So above-mentioned heater 20 is preferably mounted at the inside of box 10 and the peristome adjacency of above-mentioned box 10.Above-mentioned heater 20 is to use electrothermal wire heating's structure, omits detailed explanation because of belonging to the general knowledge technology.
And after above-mentioned heater 20 was out of service, said fans 30 was restarted independently and room air is incorporated into above-mentioned box 10 inside.Restarting of said fans 30 is by 50 controls of following controller.As required, fan is restarted needed time durations and can be set arbitrarily after above-mentioned heater 20 stops.For example, the time of restarting according to the temperature fan of change in winter shortens to some extent or elongates.And the setting that said fans 30 is restarted the time can make room air fully flow into above-mentioned box 10 inside.Under heater was arranged on situation on the ceiling, the setting of restarting the time preferably made indoor floor surrounding air fully flow into.Under this situation, the those of ordinary skill of technical field of the present invention is appreciated that this time durations is to set according to the distance between ceiling and the indoor floor.
Because said fans 30 is to restart after stopping above-mentioned heater 20, then indoor temperature is measured very accurate.Therefore, supply hot gas very efficiently thus and prevent freezing brokenly of running water pipe etc.Therefore, can fully solve owing to heater is located at the existing issue that produces on the ceiling.
Be provided with temperature sensor 40 in above-mentioned box 10 inside.Said temperature sensor 40 is measured indoor temperature, and described indoor temperature is used as the judgment data of judging that whether above-mentioned heater 20 and fan 30 start, measures the temperature that flow into the room air of above-mentioned box 10 by said fans 30.
Be provided with controller 50 in above-mentioned box 10 inside.Above-mentioned controller 50 forms circuit with above-mentioned heater 20, fan 30 and temperature sensor 40 and is located in the above-mentioned box 10.The indoor temperature that above-mentioned controller 50 is measured according to said temperature sensor 40 is controlled the operation of above-mentioned heater 20 and fan 30.
Promptly, above-mentioned controller 50 compares the indoor temperature of said temperature sensor 40 and first design temperature of setting arbitrarily when operation (startup) under the state of supply power supply, and the starting of controlling above-mentioned heater 20 and fan 30 makes indoor temperature remain on first design temperature.In addition, when its outage, controller 50 is operated by this way, be about to indoor temperature that said temperature sensor 40 detects and the second and the 3rd design temperature that has a fixed difference difference betwixt and compare, indoor temperature is remained between the second and the 3rd design temperature by the starting operation of controlling above-mentioned heater 20 and fan 30.At this, running status is meant that the user opens the operation be connected with above-mentioned controller 50 under the state of supply power supply and opens/the make and break pass promptly general running status.The interruption of operation be meant close in state ShiShimonoseki of supply power supply state operation and open/make and break closes promptly general outage state.
And said temperature sensor 40 was measured indoor temperatures after above-mentioned controller 50 moved the outage that makes above-mentioned heater 20 as restarting of above-mentioned control said fans 30.Above-mentioned controller 50 control said fans 30 are restarted in certain hour is intermittently during certain hour after above-mentioned heater 20 outage, make said temperature sensor 40 accurately measure indoor temperature.
Though not shown, the one side towards its outside of above-mentioned box 10 is provided with operating unit, operating unit is indicated the indoor temperature of being measured by said temperature sensor 40 and is used to import the design temperature and the time of control above-mentioned heater 20 of starting and fan 30.The operation that above-mentioned controller 50 is controlled above-mentioned heater 20 and fan 30 according to the design temperature by the input of aforesaid operations unit and time.
Be provided with from the outside to the power suppling part 60 of above-mentioned heater 20, fan 30, temperature sensor 40 and controller 50 supply electricity in above-mentioned box 10 inside.
Therefore, as shown in Figure 3, continue the supply electricity by above-mentioned power suppling part 60, is connected with above-mentioned controller 50 open/when the make and break pass is started by the user, keep general running status (step 100).Under this state, if the indoor temperature of said temperature sensor 40 is than first design temperature low (step 101) that is set in above-mentioned controller 50, above-mentioned controller 50 above-mentioned heaters 20 of instruction and fan 30 drives and in order to prevent the freezing brokenly to indoor supply hot gas (step 102) of running water pipe etc.In addition, under this state, if above-mentioned controller 50 is judged indoor temperature that said temperature sensors 40 detect than the first design temperature height (step 101), above-mentioned controller 50 instructs above-mentioned heater 20 and fan 30 interrupt runs and stop supplies hot gas (step 103).
Such as, when above-mentioned controller 50 was set at 7 ℃ to first design temperature, the indoor temperature that the operation of above-mentioned controller 50 above-mentioned heaters 20 of control and fan 30 detects said temperature sensor 40 was kept 7 ℃ and prevent freezing brokenly of running water pipe etc.
After above-mentioned heater 20 interrupt runs and through after a while, above-mentioned controller 50 instruction said fans 30 are restarted operation (step 108).After said fans 30 is restarted operation according to the scheduled period of the time that is set in above-mentioned controller 50, out of service again according to the instruction of above-mentioned controller 50.When said fans 30 was restarted, room air flowed into above-mentioned box 10 inside, and said temperature sensor 40 is measured indoor temperature from the room air that flow into above-mentioned box 10.As shown in table 1, this process repeatedly took place intermittently by the time that is set in above-mentioned controller 50.Above-mentioned controller 50 drove above-mentioned heaters 20 and fan 30 and to indoor supply hot gas when measurement result, indoor temperature were lower than first design temperature.
Table 1
| Starting fan | Stop fan | Starting fan | Stop fan | Starting fan | Stop fan | Starting fan | Standby | |
| After heater interrupts and through certain hour | 2 minutes 25 seconds | 6 minutes | 25 |
12 minutes | 25 seconds | 24 minutes | 25 seconds |
For example, as shown in table 1, after above-mentioned heater 20 outage and through certain hour, said fans 30 is restarted 2 minutes 25 seconds kinds of operation, makes room air flow into above-mentioned box 10 inside.When said fans 30 was restarted 2 minutes 25 seconds kinds, said temperature sensor 40 was measured the indoor air temperature that flow into above-mentioned box 10.According to measurement result, above-mentioned controller 50 judges that said fans 30 stopped 6 minutes when indoor temperature was consistent with first design temperature.Thereafter, 50 work of above-mentioned controller, thus said fans 30 is restarted 25 seconds of operation, interrupted 12 minutes, and restarted again and moved for 25 seconds, interrupted 24 minutes, again restart and moved for 25 seconds, processes such as interruption make said temperature sensor 40 accurately measure indoor temperature whereby.When said fans 30 was restarted, if above-mentioned controller 50 judges that indoor temperature is lower than first design temperature, above-mentioned heater 20 of starting operation and fan 30 were to indoor supply hot gas.These processes are carried out repeatedly by above-mentioned controller 50.Therefore, running water pipe that prevents from very efficiently to be located at toilet etc. etc. freezes brokenly.
On the other hand, continuing by above-mentioned power suppling part under supply electricity and the outage state that opening of being connected with above-mentioned controller 50/the make and break pass is closed by the user (step 100), when if the indoor temperature that said temperature sensor 40 is measured is lower than second design temperature of setting up at above-mentioned controller 50 (step 104), above-mentioned controller 50 instructions drive above-mentioned heaters 20 and fan 30 and in order to prevent the freezing brokenly to indoor supply hot gas (step 105) of running water pipe etc.Under this state, if the indoor temperature that said temperature sensor 40 is measured than the 3rd design temperature height (step 106) that is located at above-mentioned controller 50, above-mentioned controller 50 above-mentioned heaters 20 of instruction and fan 30 stops and stop supplies hot gas (step 107).
Promptly, if be set at 8 ℃ at above-mentioned controller second design temperature, then, the 3rd design temperature is set at 12 ℃, and the starting operation of above-mentioned controller 50 above-mentioned heaters 20 of control and fan 30 makes indoor temperature between 8 ℃ and 12 ℃ and prevent freezing brokenly of running water pipe etc.
After above-mentioned heater 20 interrupt runs and through certain hour, above-mentioned controller 50 instruction said fans 30 are restarted operation (step 109).Said fans 30 is restarted operation during according to the preset time that is located at above-mentioned controller 50, and fan interrupts stopping according to the instruction of above-mentioned controller 50 again afterwards.When said fans 30 was restarted operation, room air flowed into above-mentioned box 10 inside, and said temperature sensor 40 is measured the indoor air temperature that flow into above-mentioned box 10.As shown in table 2, this process repeatedly takes place intermittently by the specified time interval that is set in above-mentioned controller 50.According to measurement result, if indoor temperature not between the second and the 3rd design temperature the time, above-mentioned controller 50 drives above-mentioned heaters 20 and fan 30 and to indoor supply hot gas.
Table 2
| Starting fan | Stop fan | Starting fan | Stop fan | Starting fan | Stop fan | Starting fan | Stop (recovery) | |
| After heater interrupts and through certain hour | 2 minutes 25 seconds | 6 minutes | 25 |
12 minutes | 25 seconds | 24 minutes | 25 seconds |
Such as, as shown in table 2, after above-mentioned heater 20 interrupt runs and through certain hour, said fans 30 is by the process identical with table 1, make said temperature sensor 40 accurately measure indoor temperature, when if indoor temperature does not have between the second and the 3rd design temperature, above-mentioned controller 50 above-mentioned heaters 20 of starting and fan 30 are to indoor supply hot gas.These processes are carried out repeatedly by above-mentioned controller 50.Therefore, running water pipe that prevents from very efficiently to be located at toilet etc. etc. freezes brokenly.As shown in Table 1 and Table 2, the said fans 30 that is set in above-mentioned controller 50 is restarted the time, not only when running status, and also is suitable in the same manner during the outage.
Above process can take place when operation is interrupted (closing).That is, if when indoor temperature reaches the particular preset temperature, operation is recovered again and supply hot gas, while displays temperature and starting state, and solved the phenomenon that running water pipe is frozen brokenly because of prior art problems.Thereby make indoor temperature be positioned at range of set temperature because supply hot gas intermittently, can obtain power savings.And,, be in closed condition (outage state) again if when temperature does not descend within a certain period of time.
Industrial applicability
As above-mentioned, continue under the state of supply electricity at power supply according to the present invention, not only in starting operation, and also drive heater intermittently under the outage state and fan so that running water pipe etc. do not freeze brokenly, and to the indoor hot gas of supplying efficiently.So, with winter always starting operation and the existing heater of supplying hot gas compare, power consumption obviously reduces, and therefore obtains economic interests.And, also accurately measure when being arranged on the indoor ceiling and comprise the indoor temperature on floor and supply hot gas, therefore unlike the prior art, be located at running water pipe on the floor etc. and can not freeze brokenly.
Describing the while of the present invention with reference to specific illustrated embodiment, the present invention can not be confined to described embodiment.The those of ordinary skill of technical field of the present invention can improve the foregoing description not breaking away under the spirit and scope of the present invention.
Claims (3)
1. a heater is used to supply with hot gas in case antipriming pipe freezes brokenly, and heater is installed in indoor, and described heater comprises:
A) have the box of the spatial accommodation of required size, described box is installed on indoor ceiling or the wall, thereby the one side is exposed to the outside;
B) be installed in the above-mentioned box and be suitable for producing the heater that is used for the heat that anti-antipriming pipe freezes brokenly;
C) be installed near the fan of box internal heater, wherein, when heater work moves, fan form flow through heater and indoor air circulation indoor whereby hot gas is supplied to, even and wherein after the operation of heater is interrupted, fan can be restarted operation independently room air is incorporated into the inside of box;
D) be installed in the above-mentioned box and be suitable for surveying the temperature sensor that flow into the temperature of the room air in the above-mentioned box by said fans, described detecting temperature is as the judgment data that determines whether above-mentioned heater of starting operation and fan;
E) be installed in the above-mentioned box and be suitable for forming the controller of circuit with above-mentioned heater, fan and temperature sensor, wherein at run duration, controller is according to the internal temperature control heater of temperature sensor detection and the startup/shutoff operation of fan, and its middle controller control heater in the operation of having no progeny, thereby temperature sensor is surveyed indoor temperature and is carried out the operation of restarting of heater and fan;
F) be installed in cassette interior and be suitable for from the outside power suppling part to heater, fan, temperature sensor and controller power supply.
2. heater according to claim 1, it is characterized in that, at run duration, the operation of controller control heater and fan, thereby make the indoor temperature of surveying by temperature sensor compare and make indoor temperature to keep equating with first design temperature with the first specific design temperature, and wherein be in operation disconnected during, the operation operation of controller control heater and fan, thereby make the indoor temperature of being surveyed by temperature sensor compare and make indoor temperature to remain between the second and the 3rd design temperature with the second and the 3rd design temperature, the second and the 3rd design temperature is set up as has the temperature difference.
3. heater according to claim 1 is characterized in that, controller control fan restart operation, thereby the operation of heater is interrupted after and through during between a period of time, fan is restarted operation intermittently.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2020040016891 | 2004-06-16 | ||
| KR20-2004-0016891U KR200362784Y1 (en) | 2004-06-16 | 2004-06-16 | Power saving heater for preventing be frozen to burst |
| KR1020040083182 | 2004-10-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1839284A CN1839284A (en) | 2006-09-27 |
| CN100462644C true CN100462644C (en) | 2009-02-18 |
Family
ID=37016182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800006613A Expired - Fee Related CN100462644C (en) | 2004-06-16 | 2005-01-13 | Hot-air blower having artificial intelligence |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR200362784Y1 (en) |
| CN (1) | CN100462644C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127044A (en) * | 1982-01-21 | 1983-07-28 | Matsushita Electric Ind Co Ltd | Framed kotatsu |
| US4876436A (en) * | 1988-07-27 | 1989-10-24 | Gte Products Corporation | PTC air heater employing triangular PTC heating elements |
| US5377298A (en) * | 1993-04-21 | 1994-12-27 | Yang; Chiung-Hsiang | Cassette PTC semiconductor heating apparatus |
| KR100241442B1 (en) * | 1997-01-30 | 2000-03-02 | 구자홍 | Indoor unit of air-conditioning combined air conditioner |
| KR200347476Y1 (en) * | 2004-01-14 | 2004-04-13 | 주식회사 대가족 | a hot blast heater |
-
2004
- 2004-06-16 KR KR20-2004-0016891U patent/KR200362784Y1/en not_active IP Right Cessation
-
2005
- 2005-01-13 CN CNB2005800006613A patent/CN100462644C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127044A (en) * | 1982-01-21 | 1983-07-28 | Matsushita Electric Ind Co Ltd | Framed kotatsu |
| US4876436A (en) * | 1988-07-27 | 1989-10-24 | Gte Products Corporation | PTC air heater employing triangular PTC heating elements |
| US5377298A (en) * | 1993-04-21 | 1994-12-27 | Yang; Chiung-Hsiang | Cassette PTC semiconductor heating apparatus |
| KR100241442B1 (en) * | 1997-01-30 | 2000-03-02 | 구자홍 | Indoor unit of air-conditioning combined air conditioner |
| KR200347476Y1 (en) * | 2004-01-14 | 2004-04-13 | 주식회사 대가족 | a hot blast heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1839284A (en) | 2006-09-27 |
| KR200362784Y1 (en) | 2004-09-22 |
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Granted publication date: 20090218 Termination date: 20180113 |
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