CN113757998A - Electric water heater with temperature control adjustment function - Google Patents
Electric water heater with temperature control adjustment function Download PDFInfo
- Publication number
- CN113757998A CN113757998A CN202111066397.0A CN202111066397A CN113757998A CN 113757998 A CN113757998 A CN 113757998A CN 202111066397 A CN202111066397 A CN 202111066397A CN 113757998 A CN113757998 A CN 113757998A
- Authority
- CN
- China
- Prior art keywords
- air
- cavity
- water heater
- sliding resistor
- water
- 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.)
- Pending
Links
Images
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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
- F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
-
- 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
- F24H9/0005—Details for water heaters
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- 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
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to the technical field of water heaters, and discloses a temperature control adjusting electric water heater which comprises a water heater box body, a heating rod, a communicating pipe and a water outlet pipe, wherein a placing cavity is formed in the water heater box body and is positioned on the lower side of the heating rod, and a sliding resistor is fixedly arranged in the placing cavity. According to the invention, through designing the placing cavity, the sliding resistor, the heat conducting rod, the movable cavity and the air cavity, the temperature in the air is led into the movable cavity through the heat conducting rod, so that the volume of mercury in the movable cavity is expanded, the mercury is led into the air bag in the air cavity through the through hole through expansion of the mercury, so that the volume of the air bag is expanded, the air in the air cavity is extruded into the sliding resistor through the air hole through expansion of the air bag, so that the sliding contact in the sliding resistor is moved, the resistance value of the sliding resistor is increased, the current led in the heating rod is reduced through increase of the resistance value of the sliding resistor, the water temperature is reduced, and scalding caused by overhigh water temperature when a water heater is used by people in summer is avoided.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a temperature control adjusting electric water heater.
Background
The water heater is a device which increases the temperature of cold water into hot water within a certain time through various physical principles, and can be divided into an electric water heater, a gas water heater, a solar water heater and the like according to the principles.
The electric water heater is the most widely applied one due to the difficulty in obtaining energy, but the existing electric water heaters are usually stored in a water storage tank after being heated by cold water in use, people can obtain hot water for use only by turning on a hot water switch when using the electric water heater, the cold water needs to be added when using the electric water heater due to the fact that the power of the electric water heater is high and the temperature of the heated water is high, the situation that people are easily scalded by the hot water is easily caused if the people use the electric water heater without prompting, the temperature of the hot water needed by the people is different along with the change of seasons, the hot water with high temperature is not needed when the electric water heater is used in summer, the hot water with high temperature is needed when the electric water heater is used in winter, and the scalding is easily caused because the people are sensitive to the induction of the hot water in summer.
Disclosure of Invention
Aiming at the defects of the prior electric water heater in the background technology in the using process, the invention provides the temperature control adjusting electric water heater, which has the advantage of adjusting the water temperature of the water heater along with the change of the room temperature and solves the technical problems in the background technology.
The invention provides the following technical scheme: the utility model provides an electric water heater of control by temperature change regulation, includes water heater box, heating rod, communicating pipe and outlet pipe, the inside of water heater box is located the downside of heating rod and has been seted up and place the chamber, the fixed sliding resistance that is equipped with in inside of placing the chamber, sliding resistance's inside sliding connection has sliding contact, place the inside right side fixedly connected with heat conduction rod that is located sliding resistance of intracavity, movable chamber has been seted up to heat conduction rod's inside, the through-hole has been seted up at the middle part of activity chamber upside, the air cavity has been seted up to the upside of through-hole, the middle part fixedly connected with gasbag of air cavity bottom side, the gas pocket is seted up at the left middle part of air cavity, the inside intercommunication of air cavity and sliding resistance is had to the gas pocket, one side fixedly connected with electric baffle that the middle part in the communicating pipe is located the cold water storage cistern.
Preferably, the sliding resistor is electrically connected with the heating rod and the electric baffle plate through wires respectively, and the sliding resistor corresponds to the air hole.
Preferably, the through hole communicates the movable cavity with the air chamber, and the air chamber is constant with the air pressure inside the sliding resistor through the air hole.
Preferably, the communicating pipe communicates the cold water tank, the hot water tank and the water outlet pipe, and the electric baffle is located at one side of the communicating pipe close to the cold water tank.
Preferably, one end of the heat conducting rod extends out of the outer side of the water heater box body, and mercury is contained in a movable cavity inside the heat conducting rod.
The invention has the following beneficial effects:
1. according to the invention, through designing the placing cavity, the sliding resistor, the heat conducting rod, the movable cavity and the air cavity, the temperature in the air is led into the movable cavity through the heat conducting rod, so that the volume of mercury in the movable cavity is expanded, the mercury is led into the air bag in the air cavity through the through hole through expansion of the mercury, so that the volume of the air bag is expanded, the air in the air cavity is extruded into the sliding resistor through the air hole through expansion of the air bag, so that the sliding contact in the sliding resistor is moved, the resistance value of the sliding resistor is increased, the current led in the heating rod is reduced through increase of the resistance value of the sliding resistor, the water temperature is reduced, and scalding caused by overhigh water temperature when a water heater is used by people in summer is avoided.
2. According to the invention, by designing the sliding resistor, the heat conducting rod, the movable cavity, the air cavity and the electric baffle, when the water heater is used at low room temperature in winter, the volume of the air bag is reduced through the reduction of the volume of mercury in the heat conducting rod, so that the air pressure in the air cavity is reduced, the sliding contact is driven to move to the right, the resistance value of the sliding resistor is reduced, the current input by the heating rod is increased, the water temperature in the hot water tank is improved, meanwhile, the resistance value of the sliding resistor is reduced, so that the electric baffle works to reduce the pipe orifice of the cold water port in the communication pipe, the water yield of cold water is reduced, and more hot water is required to be added due to the reduction of the water temperature of hot water caused by excessive cold water yield, thereby the waste of water resources and the loss of electric energy are avoided.
3. The invention controls the current required by the heating rod through the change of the volume of mercury in the heat conducting rod along with the change of the room temperature, thereby controlling the water temperature, and simultaneously, when the water heater is used at a higher temperature in summer, the volume of mercury is increased due to the higher room temperature, so that the resistance value of the sliding resistor is increased, and simultaneously, the current required by the electric baffle is reduced, so that the opening of a cold water port in the communicating pipe is opened to be larger, the water outlet quantity of cold water is increased, the temperature of hot water flowing out of the hot water tank is reduced, and scalding caused by people under the condition of no prompt can be avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the sliding contact of the present invention in a leftward movement state;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention.
In the figure: 1. a water heater tank body; 2. a water injection pipe; 3. a cold water tank; 4. a hot water tank; 5. a heating rod; 51. a placement chamber; 52. a sliding resistor; 521. a sliding contact; 53. a heat conducting rod; 531. a movable cavity; 532. a through hole; 533. an air cavity; 534. an air bag; 535. air holes; 6. a communicating pipe; 61. an electric baffle; 7. and (5) discharging a water pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an electric water heater with temperature control adjustment comprises a water heater box body 1, a water injection pipe 2 is fixedly connected to the middle of the upper side of the water heater box body 1, a cold water tank 3 is arranged on the left side inside the water heater box body 1, a hot water tank 4 is arranged on the right side inside the water heater box body 1, two water inlets of the water injection pipe 2 are respectively communicated with the cold water tank 3 and the hot water tank 4, a heating rod 5 is fixedly connected to the inside of the hot water tank 4, a communicating pipe 6 is fixedly connected to the bottom of the cold water tank 3, an upper opening of the communicating pipe 6 is fixedly connected to the bottom of the hot water tank 4, and a water outlet pipe 7 is fixedly connected to the middle of the communicating pipe 6.
Referring to fig. 1, 2 and 3, a placing cavity 51 is formed in the water heater case 1 at the lower side of the heating rod 5, a sliding resistor 52 is fixedly arranged in the placing cavity 51, a sliding contact 521 is slidably connected in the sliding resistor 52, a heat conducting rod 53 is fixedly connected in the placing cavity 51 at the right side of the sliding resistor 52, a movable cavity 531 is formed in the heat conducting rod 53, one end of the heat conducting rod 53 extends out of the water heater case 1, mercury is contained in the movable cavity 531 in the heat conducting rod 53, a through hole 532 is formed in the middle of the upper side of the movable cavity 531, an air cavity 533 is formed in the upper side of the through hole 532, an air bag 534 is fixedly connected to the middle of the bottom side of the air cavity 533, the movable cavity 531 is communicated with the air bag 534 by the through hole 532, the air cavity 533 is constant in air pressure in the sliding resistor 52 through the air hole 535, and when the volume of the mercury in the movable cavity 531 is increased or decreased due to the temperature, the volume of the air bag 534 is expanded and reduced, so that the sliding contact 521 controls the resistance of the sliding resistor 52 to be increased and reduced, the current required by the heating rod 5 is further controlled, the temperature of hot water in the hot water tank 4 is controlled through room temperature, the air hole 535 is formed in the middle of the left side of the air hole 533, the air hole 535 communicates the air hole 533 with the inside of the sliding resistor 52, the electric baffle 61 is fixedly connected to one side of the middle part in the communication pipe 6, which is positioned at the cold water tank 3, the sliding resistor 52 is electrically connected with the heating rod 5 and the electric baffle 61 through wires, the sliding resistor 52 corresponds to the air hole 535, the communication pipe 6 communicates the cold water tank 3, the hot water tank 4 and the water outlet pipe 7, the electric baffle 61 is positioned at one side of the communication pipe 6, which is close to the cold water tank 3, the movement of the electric baffle 61 is controlled through the resistance change of the sliding resistor 52, the size of the outlet of the communicating pipe 6, which is close to the cold water tank 3, is further controlled, thereby controlling the water yield of cold water and avoiding the waste of water resources and the loss of electric energy.
Referring to fig. 1, 2 and 3, when the water heater is used in winter, the volume of mercury in the movable chamber 531 is reduced by reducing the indoor temperature, so that the air pressure is reduced, so that the air pressure in the air bag 534 is reduced, and the resistance of the sliding resistor 52 is reduced by moving the sliding contact 521 to the right, so that the current of the heating rod 5 is controlled to be increased, so that the temperature of hot water in the hot water tank 4 is increased, and the resistance of the sliding resistor 52 is reduced, so that the electric baffle 61 is operated, the water outlet of the communication pipe 6 near the cold water tank 3 is reduced, so that the water yield of cold water is controlled, so that the heated hot water is prevented from being cooled, thereby causing waste of water resources and loss of electric energy, when the water heater is used in summer, the volume of mercury in the movable chamber 531 is expanded by increasing the indoor temperature, so that mercury enters the air bag 534 to increase the volume of the air bag 534, thereby the gas that makes air chamber 533 gets into inside the sliding resistor 52 through gas hole 535, make sliding contact 521 remove and make the resistance increase of sliding resistor 52, thereby make the electric current of heating rod 5 reduce, thereby reduce the inside hot-water temperature of hot-water tank 4, the resistance increase of sliding resistor 52 makes the electric current of electronic baffle 61 reduce simultaneously, thereby make the inside opening that is close to cold water tank 3 department of communicating pipe 6 increase, make the water yield of cold water increase, avoid causing the condition of scald when using owing to not having the suggestion.
The use method (working principle) of the invention is as follows:
firstly, the volume of mercury in the movable cavity 531 is expanded and increased through the increase of the indoor temperature, the expanded mercury enters the air bag 534 to increase the volume of the air bag 534, so that the gas in the air cavity 533 is squeezed into the sliding resistor 52 through the air hole 535, the sliding contact 521 is moved to promote the resistance value of the sliding resistor 52 to be increased, the current required by the heating rod 5 is reduced, the temperature of hot water in the hot water tank 4 is controlled, when the water heater is used in winter, the volume of the mercury in the movable cavity 531 is reduced, the volume of the air bag 534 is reduced, the air pressure in the air cavity 533 is reduced, the sliding contact 521 is moved to the right to reduce the resistance value of the sliding resistor 52, the current required by the heating rod 5 is increased, the temperature of hot water in the hot water tank 4 is increased, meanwhile, the current of the electric baffle 61 is controlled by the sliding resistor 52 to be increased, and the size of a water outlet of the communication pipe 6 close to the cold water tank 3 is reduced, the water yield of the cold water is reduced, and the waste of water resources and the loss of electric energy caused by overlarge water yield of the cold water are avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an electric water heater of control by temperature change regulation, includes water heater box (1), heating rod (5), communicating pipe (6) and outlet pipe (7), its characterized in that: a placing cavity (51) is arranged in the water heater box body (1) and positioned at the lower side of the heating rod (5), a sliding resistor (52) is fixedly arranged in the placing cavity (51), a sliding contact (521) is connected in the sliding way in the sliding resistor (52), a heat conducting rod (53) is fixedly connected with the right side of the sliding resistor (52) in the placing cavity (51), a movable cavity (531) is arranged inside the heat conducting rod (53), a through hole (532) is arranged in the middle of the upper side of the movable cavity (531), an air cavity (533) is arranged at the upper side of the through hole (532), an air bag (534) is fixedly connected with the middle part of the bottom side of the air cavity (533), the middle part of the left side of the air cavity (533) is provided with an air hole (535), the air hole (535) communicates the air cavity (533) with the inside of the sliding resistor (52), and an electric baffle (61) is fixedly connected to one side of the cold water tank (3) at the middle part in the communicating pipe (6).
2. A temperature controlled regulated electric water heater as claimed in claim 1, wherein: the sliding resistor (52) is electrically connected with the heating rod (5) and the electric baffle (61) through leads respectively, and the sliding resistor (52) corresponds to the air hole (535).
3. A temperature controlled regulated electric water heater as claimed in claim 1, wherein: the through hole (532) connects the movable cavity (531) and the air bag (534), and the air cavity (533) is constant with the air pressure inside the sliding resistor (52) through the air hole (535).
4. A temperature controlled regulated electric water heater as claimed in claim 1, wherein: the communicating pipe (6) is used for communicating the cold water tank (3), the hot water tank (4) and the water outlet pipe (7), and the electric baffle (61) is positioned on one side, close to the cold water tank (3), in the communicating pipe (6).
5. A temperature controlled regulated electric water heater as claimed in claim 1, wherein: one end of the heat conducting rod (53) extends out of the outer side of the water heater box body (1), and mercury is contained in a movable cavity (531) in the heat conducting rod (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066397.0A CN113757998A (en) | 2021-09-13 | 2021-09-13 | Electric water heater with temperature control adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066397.0A CN113757998A (en) | 2021-09-13 | 2021-09-13 | Electric water heater with temperature control adjustment function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113757998A true CN113757998A (en) | 2021-12-07 |
Family
ID=78795075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111066397.0A Pending CN113757998A (en) | 2021-09-13 | 2021-09-13 | Electric water heater with temperature control adjustment function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113757998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636367A (en) * | 2022-05-17 | 2022-06-17 | 欧璧医药包装科技(中国)有限公司 | Synchronous detection equipment for inner and outer diameters of bottle mouth of penicillin bottle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130266296A1 (en) * | 2012-04-09 | 2013-10-10 | David Kreutzman | Control Systems for Renewable Hot Water Heating Systems |
| CN205536579U (en) * | 2016-04-20 | 2016-08-31 | 河海大学 | Water heater at regular time and quantity |
| CN110440435A (en) * | 2019-08-13 | 2019-11-12 | 陈凡 | One kind continues for heat type water heater |
| CN210463564U (en) * | 2019-05-05 | 2020-05-05 | 苏州泰尔航空材料有限公司 | Double-water-tank water supply system |
| CN111140668A (en) * | 2020-01-14 | 2020-05-12 | 仲玥 | Water mixing faucet with hot water temperature compensation function |
| CN211574391U (en) * | 2020-01-17 | 2020-09-25 | 北京玛斯特系统工程有限公司 | Intelligent induction type water tap |
| CN212274161U (en) * | 2020-05-21 | 2021-01-01 | 陕西安嘉冷暖科技有限公司 | Constant temperature and humidity ecological air conditioner |
| CN113291441A (en) * | 2021-05-27 | 2021-08-24 | 杭州鑫锡电子商务有限公司 | Air interchanger capable of being automatically started and insulated according to external temperature |
-
2021
- 2021-09-13 CN CN202111066397.0A patent/CN113757998A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130266296A1 (en) * | 2012-04-09 | 2013-10-10 | David Kreutzman | Control Systems for Renewable Hot Water Heating Systems |
| CN205536579U (en) * | 2016-04-20 | 2016-08-31 | 河海大学 | Water heater at regular time and quantity |
| CN210463564U (en) * | 2019-05-05 | 2020-05-05 | 苏州泰尔航空材料有限公司 | Double-water-tank water supply system |
| CN110440435A (en) * | 2019-08-13 | 2019-11-12 | 陈凡 | One kind continues for heat type water heater |
| CN111140668A (en) * | 2020-01-14 | 2020-05-12 | 仲玥 | Water mixing faucet with hot water temperature compensation function |
| CN211574391U (en) * | 2020-01-17 | 2020-09-25 | 北京玛斯特系统工程有限公司 | Intelligent induction type water tap |
| CN212274161U (en) * | 2020-05-21 | 2021-01-01 | 陕西安嘉冷暖科技有限公司 | Constant temperature and humidity ecological air conditioner |
| CN113291441A (en) * | 2021-05-27 | 2021-08-24 | 杭州鑫锡电子商务有限公司 | Air interchanger capable of being automatically started and insulated according to external temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636367A (en) * | 2022-05-17 | 2022-06-17 | 欧璧医药包装科技(中国)有限公司 | Synchronous detection equipment for inner and outer diameters of bottle mouth of penicillin bottle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100467972C (en) | Energy saving controlling method for electric water heater, and electrically heating system | |
| CN113757998A (en) | Electric water heater with temperature control adjustment function | |
| CN204373231U (en) | A kind of multifunctional solar water heater | |
| CN203643866U (en) | Control circuit of water-stored electric water heater | |
| CN206113319U (en) | Heat pump water heater intelligent temperature controller | |
| CN205783734U (en) | Novel energy-conserving water heater | |
| CN101569505B (en) | Hydraulic controlled electricity-saving multifunctional water dispenser | |
| CN211432351U (en) | Multiple explosion-proof protection water dispenser | |
| CN201093700Y (en) | Electric water heater with automatic speed changing capacity adding device | |
| CN100498108C (en) | Heating drinking apparatus | |
| CN211261253U (en) | Steam heating hot water device | |
| CN204285607U (en) | PTC thermal sensitive ceramic electric heater with variable convection mode | |
| CN206001676U (en) | Intelligent temperature controls gas heater | |
| CN210345641U (en) | Automatic exhaust device for radiator | |
| CN2731357Y (en) | Compensation heater for solar energy water-heater | |
| CN109612109B (en) | Cold water recovery type hot water system and cold water recovery method | |
| CN210069999U (en) | Liquid heat accumulating type heat supply and bath dual-purpose electric boiler | |
| CN208111645U (en) | electronic thermostat | |
| CN2329903Y (en) | Constant temp water storage type water heater | |
| CN2909094Y (en) | Internal heating water heating type electric heater | |
| CN100501265C (en) | New type heating drinking water apparatus | |
| CN2679559Y (en) | Heating having room temp auto-controlled | |
| CN211316617U (en) | Solar hot water control device | |
| CN208983597U (en) | A kind of gas heater of novel energy-conserving | |
| CN206771504U (en) | A kind of air-flow spit of fland |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |