EP0209867A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electric instantaneous boiler
Assignee: Panasonic Holdings Corp
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Filing: 1986-07-19
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Granted: —
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Expires: 2006-07-19
Abstract
Abstract An electric instantaneous boiler wherein a first opening portion as the hot water outlet opening (18a) of an output hot water pipe (18) is provided in the lower portion within the tank (16) to reduce the overshoot of the output hot water temperature through the after-boiling, further a second opening portion (18b) of the output hot water pipe as the air vent opening is provided in the upper portion within the tank to prevent the abnormal excessive rise of the sheath heater (17). Also, the heat sensing portion of the temperature detector (19) is provided in the position of the first opening portion where the thermal influences of the sheath heater (17) are not directly applied so that the thermal response property is superior, and the stable output hot temperature is provided. Furthermore, the temperature sensing portion of the excessive temperature rise preventing apparatus (21) is provided on the tank top-face on the shaft center of the input water (18) pipe to quickly stop the energization of the heating heater during the abnormal operation.
Inventors
- 👤 Mitsuo Takai
- 👤 Takashi Tanahashi
- 👤 Masahito Uemura
- 👤 Yasukiyo Ueda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 04:44
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102; F24H15/00; F24H15/10; F24H15/128; F24H15/132; F24H15/174; F24H15/20; F24H15/212; F24H15/219; F24H15/30; F24H15/355; F24H15/37; F24H15/40; F24H15/407; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into the tank, an output hot water pipe for outputting the hot water from said tank, said output hot water pipe having an opening portion in the lower portion within said tank.
Claim 2
Dependent Claim
51 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into the tank, an output hot water pipe for outputting the hot water from said tank, said output hot water pipe having an opening portion in the lower portion within said tank.
Claim 3
Dependent Claim
68 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into this tank, an output hot water pipe for outputting the hot water provided across the upper and lower portions within said tank, said output hot water pipe having a first opening portion as the flow outlet opening of the hot water in the lower portion within said tank.
Claim 4
Dependent Claim
68 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into this tank, an output hot water pipe for outputting the hot water provided across the upper and lower portions within said tank, said output hot water pipe having a first opening portion as the flow outlet opening of the hot water in the lower portion within said tank.
Claim 5
Dependent Claim
34 words
An electric instantaneous boiler in accordance with Claim 2, wherein a second opening portion as an air vent hole is provided in the upper portion within the tank of the output hot water pipe.
Claim 6
Dependent Claim
215 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into this tank, an output hot water pipe for outputting the hot water from said tank, a temperature detector for detecting the temperature of the water flowing into the output hot water pipe from said tank, a control apparatus for inputting the detecting signals coming from the temperature detector and controlling the feed power to said heater so that the detection temperature values and the set temperature values are compared with each other to control in pulse the switching elements in accordance with the deviation values thereby keeping the deviation values at almost zero, said output hot water pipe is provided across the upper and lower portions of said tank, the lower portion within said tank of the output hot water pipe has a flow outlet opening which becomes an entrance of the water from said tank to said output hot water pipe to throttle the flow amount, the heat sensing portion of said temperature detector is located within the output hot water pipe near said flow outlet opening, one portion of said heater is provided near said flow outlet and in the position where the thermal influences are not applied upon said heat sensing portion.
Claim 7
Dependent Claim
215 words
An electric instantaneous boiler comprising a tank having a heating heater, an input water pipe for flowing the water into this tank, an output hot water pipe for outputting the hot water from said tank, a temperature detector for detecting the temperature of the water flowing into the output hot water pipe from said tank, a control apparatus for inputting the detecting signals coming from the temperature detector and controlling the feed power to said heater so that the detection temperature values and the set temperature values are compared with each other to control in pulse the switching elements in accordance with the deviation values thereby keeping the deviation values at almost zero, said output hot water pipe is provided across the upper and lower portions of said tank, the lower portion within said tank of the output hot water pipe has a flow outlet opening which becomes an entrance of the water from said tank to said output hot water pipe to throttle the flow amount, the heat sensing portion of said temperature detector is located within the output hot water pipe near said flow outlet opening, one portion of said heater is provided near said flow outlet and in the position where the thermal influences are not applied upon said heat sensing portion.
Claim 8
Dependent Claim
39 words
An electric instantaneous boiler in accordance with Claim 1, wherein the input water pipe has an opening portion in the lower portion within the tank, the opening portion is adapted to direct in the upper direction of the tank.
Claim 9
Dependent Claim
47 words
An electric instantaneous boiler in accordance with Claim 5, wherein the heating heater is provided in a position deviated from the shaft center, the input water pipe is provided in the tank lower portion of the tank where the heating heater of said tank is not provided.
Claim 10
Dependent Claim
67 words
An electric instantaneous boiler in accordance with Claim 6, wherein the temperature sensing portion of a temperature excessive rise preventing apparatus is provided on the upper portion of the tank, the shaft center of the input water pipe and the heat sensing portion of the temperature excessive rise preventing apparatus are adapted to be located almost on the same shaft in the vertical direction of the tank.
Claim 11
Dependent Claim
44 words
An electric instantaneous boiler in accordance with Claim 6, wherein the heating heater is made the coil-shaped sheath heater, the lead portion of the sheath heater is provided on the side of the space portion, wherein the heater is not provided, of the tank.
Claim 12
Dependent Claim
56 words
An electric instantaneous boiler in accordance with Claim 2, wherein the heating heater is the coil-shaped sheath heater, and is located between the tank inner wall and the outer wall of the output hot water pipe, the outer diameter of the output hot water pipe within the tank is close to the heating heater inner wall.
References Cited (Backward Citations)
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