EP3418649B1 - Appareil d'eau chaude et système d'eau chaude l'utilisant - Google Patents

Appareil d'eau chaude et système d'eau chaude l'utilisant Download PDF

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Publication number
EP3418649B1
EP3418649B1 EP18178917.3A EP18178917A EP3418649B1 EP 3418649 B1 EP3418649 B1 EP 3418649B1 EP 18178917 A EP18178917 A EP 18178917A EP 3418649 B1 EP3418649 B1 EP 3418649B1
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EP
European Patent Office
Prior art keywords
water
hot water
controller
appliance
pipe section
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
Application number
EP18178917.3A
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German (de)
English (en)
Other versions
EP3418649A1 (fr
Inventor
Lili Chen
Bo Wang
Wenjie CHENG
He Ting WANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant Wuxi Heating Equipment Co Ltd
Vaillant GmbH
Original Assignee
Vaillant Wuxi Heating Equipment Co Ltd
Vaillant GmbH
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Publication of EP3418649A1 publication Critical patent/EP3418649A1/fr
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Publication of EP3418649B1 publication Critical patent/EP3418649B1/fr
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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
    • F24H9/02—Casings; Cover lids; Ornamental panels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0078—Recirculation systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/486—Control of fluid heaters characterised by the type of controllers using timers
    • 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
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes 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
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F24H9/139—Continuous flow 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
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/044—Flow sensors
    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters

Definitions

  • the present invention relates to the field of hot water system, and more particularly to a water preheating circulation assembly suitable for domestic hot water system.
  • a gas-fired water heating appliance having a preheat function.
  • the appliance is provided with a water pump and a water tank for preheating cold water in the pipelines before a user can use it so that hot water can be supplied immediately when the user turns on the hot water faucet, thereby improving the user's experience.
  • the water pump is only mounted in the water preheating circuit, and it would not work when there is a need for providing domestic hot water at certain water consuming point.
  • the Chinese patent CN 103712329 B discloses a gas water heater with a preheat function.
  • the gas water heater has a cold water incoming line 31 where a water pump 11 is mounted, one pipe section with a flow sensor 4 mounted therein connected between the cold water incoming line 31 and water mains, and another pipe section with an electromagnetic water valve 7 mounted therein connected between the cold water incoming line 31 and returning pipelines 10.
  • the water pump 11 is activated, and the electromagnetic water valve 7 is actuated to be open to allow water coming from the returning pipelines to enter the appliance for being preheated.
  • the temperature of water output from the gas water heater may be higher than a preset outlet temperature. This is because, the inlet water temperature is relatively high as ambient temperature is high, therefore, even if the gas water heater works at a minimum workload, the temperature of water can readily reach and exceed the preset outlet temperature.
  • a constant-temperature water heater that can output water with a constant temperature preset by the user. In this case, the temperature of water directly output from the hot faucet of certain water consuming point is often higher than the preset outlet temperature, which results in poor user's experience or even burn the user.
  • a hot water system including a hot water appliance, a cold water line connected to the first water inlet port of the hot water appliance, a hot water line connected to the water outlet port of the hot water appliance; and a return water line having one end connected to the second water inlet port of the hot water appliance and the other end connected with the hot water line.
  • the hot water appliance including a housing, a heat source, and a hydraulic assembly.
  • the housing has a first water inlet port, a second water inlet port, and a water outlet port.
  • the heat source is disposed in the housing.
  • the hydraulic assembly is disposed in the housing and including a heat exchange line for allowing water passing therethrough to absorb heat generated by the heat source, a first pipe section connected with the first water inlet port and communicating with the heat exchange line, and a second pipe section connected with the second water inlet port and communicating with the heat exchange line, wherein the first pipe section and the second pipe section are arranged in parallel.
  • a circulation pump is disposed in the heat exchange line.
  • a flow sensor is disposed in the first pipe section.
  • An electrically actuated valve is provided in the second pipe section.
  • the circulation pump is capable of operating in a normal mode and a boost mode; and the hot water appliance further includes a controller electrically connected with the circulation pump, the flow sensor, and the electrically actuated valve; and wherein the controller is configured to control the electrically actuated valve to be closed to block the flow of water in the second pipe section and to activate the circulation pump to operate in the boost mode when the controller detects there is a flow of water in the first pipe section through the flow sensor.
  • the controller activates the circulation pump to operate in a normal mode on receiving a trigger signal, at this time, the electrically actuated valve is in an open state, and the water is pumped through the second pipe section into the heat exchange line.
  • the hot water appliance further includes a timer electrically connected with the controller; when a preset time is reached, the controller receives the trigger signal from the timer.
  • the hot water appliance further includes a wireless communication module electrically connected with the controller, and the controller receives the trigger signal through the wireless communication module.
  • the hot water appliance further includes a temperature sensor disposed in the heat exchange line; and the controller is configured to detect the temperature of water within the heat exchange line through the temperature sensor and to deactivate the operation of the circulation pump when the detected temperature reaches a predetermined threshold.
  • the controller includes an appliance control unit and a pump control unit electrically connected with the appliance control unit; wherein the appliance control unit is electrically connected to the flow sensor, and the pump control unit is electrically connected to the circulation pump and the electrically actuated valve.
  • the electrically actuated valve includes a motor electrically connected to the controller and a valve engaged with the motor, wherein the motor is driven by the controller to control the valve to open or close.
  • the present invention has the advantages that: since the circulation pump is disposed in the heat exchange line, the stability of the pressure of cold water supplied can be assured. In addition, as the circulation pump is operated in the boost mode, it can create increased pressure to the cold water to further increase the supply of cold water. Therefore, even in a hot summer, when the ambient temperature is close to the outlet water temperature preset by the user, the temperature of hot water output from the gas water heater can be steadily kept at the preset value, thereby avoiding causing user's discomfort due to the overheating water.
  • the hot water system of the present invention is suitable for home applications and can be used to provide domestic hot water and/or space heating.
  • the hot water system includes a hot water appliance.
  • the hot water appliance may be a gas water heater fired with combustible gas, or may be an appliance for heating water by heat exchangers, such as a solar water heater or a heat pump.
  • Gas-fired water heating appliances are used to heat domestic water by burning combustible gas to meet the needs of hot water for users, such as gas water heaters that provide domestic hot water, or gas boilers that can provide both domestic hot water and needs of space heating.
  • a gas water heater will be examplified to explain the present invention in details in the following embodiments.
  • a hot water system 100 in accordance with a first embodiment of present invention, includes a gas water heater, a cold water line 81 connected to a water inlet of the gas water heater (a first water inlet port 11 that will be described in details later) to provide cold water.
  • a hot water line 82 connected to a water outlet of the gas water heater (an outlet port 12 that will be described in details later) to output hot water, and a return water line 83 connected between the gas water heater and the hot water line 82.
  • the return water line 83 is connected to a second water inlet port 13 (described in details later) of the gas water heater.
  • the cold water line 81, the hot water line 82, and the return water line 83 may be formed by a single water pipe, or may be composed by a number of water pipes connected in series.
  • the hot water line 82 is mainly provided to allow the flow of hot water discharged from the gas water heater when the gas water heater is in operation, and when the gas water heater is not in operation, the water remained in the hot water line gradually cools to the room temperature that equals to the temperature of water remained in the cold water line 81.
  • the hot water system 100 also includes a number of water consuming points 91 (only one is shown in the figure), and the hot water line 82 is connected to pipe joints at the water consuming points.
  • the gas water heater includes a housing 10, and a heat source 20, a heat exchanger 30, a gas exhausting device 40, and a hydraulic assembly are all disposed in the housing.
  • the housing 10 is provided at the bottom thereof with the first water inlet port 11, the second water inlet port 13, and a water outlet port 12.
  • the first and the second water inlet ports and the water outlet port may take form of pipe joints.
  • the heat source 20 may be a burner composed of a number of burner blades (not shown) arranged side by side. Each burner blade may be provided with a gas-air mixture passage where gas supplied through a gas line (not shown) mixes with primary air to form gas-air mixture that is further delivered to fire holes at the top of the burner blade to be burnt to generate heat.
  • the heat exchanger 30 is mounted above the burner 20, and it can be in form of a finned tube heat exchanger, that is, a number of fins (not shown) are disposed in a heat exchanger shell with a heat exchange line 143 extending through the fins transversely.
  • the heat exchange line 143 may be formed by a single water pipe, or may be composed by a number of water pipes connected in series.
  • the burner 20 burns the gas-air mixture and generates high-temperature flue gas. When the flue gas passes through the heat exchanger 30, the flue gas dissipates heat to the fins, and the heat is further transferred to the water flowing through the heat exchange line. The flue gas is then collected by the gas exhausting device 40 and discharged to outdoors.
  • the hydraulic assembly includes the heat exchange line 143 that has one end connecting to the water outlet port 12, a first pipe section 141 connected to the first water inlet port 11 and communicating with the heat exchange line 143, and a second pipe section 142 connected to the second water inlet port 13 and communicating with the heat exchange line 143.
  • the water flowing through the heat exchange line 143 is heated by the heat exchanger 30 and then enters the hot water line 82 through the water outlet port 12, thereby outputting domestic hot water at the water consuming point 91.
  • the first pipe section 141 and the second pipe section 142 are arranged in parallel.
  • the first and the second pipe sections 141, 142 may be formed by a single water pipe or a part of the single water pipe, or may be composed by multiple water pipes connected in series.
  • a flow sensor 53 is provided in the first pipe section 141 to detect the flow of water in the first pipe section.
  • An electrically actuated valve 54 is disposed in the second pipe section 142.
  • the electrically actuated valve 54 includes a motor and a valve engaged with the motor.
  • the motor can be a step motor with a motor shaft engaged with the valve, thus the valve is driven by the rotation of the motor shaft to generate a linear movement, so as to make the valve open and close.
  • the electrically actuated valve 54 is in a normally open state.
  • a circulation pump 51 is provided in the heat exchange line 143.
  • the circulation pump 51 is a booster pump capable of operating in a normal mode and a boost mode. When being operated in the boost mode, the circulation pump creates increased pressure to the water flowing in the pipeline, which result in a water flow rate greater than that in the normal mode.
  • a temperature sensor 52 is provided in the heat exchange line 143.
  • a controller is also provided in the housing 10.
  • the controller includes an appliance control unit 61 and a pump control unit 62 electrically connected with the appliance control unit 61.
  • the appliance control unit 61 is configured to control the operation of most of the electrical devices of the gas water heater, such as controlling the ignition of the ignition unit (not shown) of the burner, the operation of the gas proportional valve (not shown), and so on.
  • the appliance control unit 61 is also electrically connected with the flow sensor 53 and the temperature sensor 52.
  • the pump control unit 62 is electrically connected with the circulation pump 51 and the electrically actuated valve 54 to control the operation of these two devices.
  • the appliance control unit 61 and the pump control unit 62 each may be a logic control circuit formed by a number of electronic components connected in accordance with certain wiring patterns; or it may also be a microcontroller (MCU) storing program instructions; or it may be integrated chips with specific use, such as Field-Programmable Gate Arrays (FPGAs).
  • MCU microcontroller
  • FPGAs Field-Programmable Gate Arrays
  • a timer 71 and the appliance control unit 61 are electrically connected via electric wires or cables.
  • the timer may be an electronic timer, which is disposed outside of the housing 10 and has a time setting interface. The user may preset a time for preheating water remaining in pipelines. When the preset time is reached, the timer 71 will transmit a trigger signal to the appliance control unit 61, then the appliance control unit 61 activates the circulation pump 51 to operate.
  • a wireless communication module 72 is also connected to the appliance control unit 61 through electric wires or cables.
  • the wireless communication module 72 may be a Wi-Fi module, which can perform wireless communication with a mobile terminal (not shown) through a wireless router (not shown).
  • the mobile terminal may be a smart phone with installing an application (APP) suitable for the control of the gas water heater, and the user can start the preheating cycle of the hot water system at any time he or she desires through the application.
  • the appliance control unit 61 receives the trigger signal from the user's smart phone through the wireless communication module 72, so as to activate the circulation pump 51 to operate.
  • the gas water heater is equipped with both the timer and the wireless communication module to allow the user to selectively trigger the operation of the circulation pump.
  • the gas water heater may only be equipped with one of the timer and the wireless communication module for the purpose of reducing costs.
  • cold water in the cold water line 81 enters the heat exchange line 143 through the first water inlet port 11 and the first pipe section 141.
  • the appliance control unit 61 sends a corresponding signal to the pump control unit 62 when the flow sensor 53 detects there is a flow of water in the first pipe section 141.
  • the pump control unit 62 controls the electrically actuated valve 54 to be closed to shut off the flow of water in the second pipe section 142, and at the same time, to activate the circulation pump 51 to work in the boost mode.
  • the water After being heated by the heat exchanger 30, the water flows out of the gas water heater through the water outlet port 12, and is supplied to the water consuming point 91 via the hot water line 82. Since the circulation pump 51 is disposed in the heat exchange line 143, the stability of the pressure of cold water supplied can be assured. In addition, as the circulation pump is operated in the boost mode, it can create increased pressure to the cold water to further increase the supply of cold water. Therefore, even in a hot summer, when the ambient temperature is close to the outlet water temperature preset by the user, the temperature of hot water output from the gas water heater can be steadily kept at the preset value, thereby avoiding causing user's discomfort due to the overheating water.
  • the user can preset the time to start the preheating cycle within the hot water system through the timer 71, or turn on the preheating cycle through specific application on the smart phone.
  • the appliance control unit 61 receives the trigger signal from the timer 71 or the wireless communication module 72, it sends a corresponding signal to the pump control unit 62, and then the pump control unit 62 activates the circulation pump 51 to operate in the normal mode. If the electrically actuated valve 54 is in the closed state at this time, the pump control unit 62 actuates the electrically actuated valve to open the valve; if the electrically actuated valve 54 is in the normally open state at this time, the pump control unit 62 does nothing to the electrically actuated valve.
  • the water in the second pipe section 142 flows through the heat exchange line 143 and enters the hot water line 82 via the water outlet port 12 after being heated by the heat exchanger 30, and then passes through the return water line 83 and goes back into the gas water heater again via the second water inlet port 13. In this way, the water remaining in the pipelines can be continuously heated by repeating the preheating cycle.
  • the appliance control unit 61 monitors the temperature of the water in the water preheating circuit through the temperature sensor 52.
  • the appliance control unit 61 deactivates the circulation pump 51 through the pump control unit 62, and cuts off the gas supply and stops the operation of the burner, thereby avoiding the water within the preheating circuit being overheated and preventing the user from being burned when the user turns on the hot faucet.
  • Fig. 2 shows a hot water system in accordance with a second embodiment of the present invention.
  • the controller includes only the appliance control unit 61, in other words, the pump control unit 62 in the above embodiments is integrated into the appliance control unit 61. Since the operation performed by present controller is similar to that performed by the controller composed of the appliance control unit and the pump control unit as described in the above embodiments, the applicant will not repeat them hereinafter.
  • the appliance control unit 61 is electrically connected to the circulation pump 51, the temperature sensor 52, the flow sensor 53, the electrically actuated valve 55, the timer 71, and the wireless communication module 72 via wires or cables.
  • the electrically actuated valve 55 in this embodiment is in the form of a solenoid valve, i.e., it does not require a motor, instead, the operation of opening and closing of the valve is controlled by the electromagnetic force.

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  • 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)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Claims (7)

  1. Système d'eau chaude (100, 200), dans lequel le système comprend :
    un appareil d'eau chaude comprenant :
    un boîtier (10) présentant un premier orifice d'arrivée d'eau (11), un second orifice d'arrivée d'eau (13) et un orifice de sortie d'eau (12) ;
    une source de chaleur (20) disposée dans le boîtier ;
    un ensemble hydraulique disposé dans le boîtier et comprenant une conduite d'échange de chaleur (143) pour permettre à l'eau passant à travers celle-ci d'absorber de la chaleur générée par la source de chaleur, une première section de tuyau (141) raccordée au premier orifice d'entrée d'eau et communiquant avec la conduite d'échange de chaleur, et une seconde section de tuyau (142) raccordée au second orifice d'entrée d'eau et communiquant avec la conduite d'échange de chaleur ; dans lequel la première section de tuyau et la seconde section de tuyau sont agencées en parallèle ;
    une pompe de circulation (51) disposée dans la conduite d'échange de chaleur ;
    un capteur de débit (53) disposé dans la première section de tuyau ; et
    une soupape à actionnement électrique (54) prévue dans la seconde section de tuyau ;
    et l'appareil d'eau chaude comprend en outre un dispositif de commande raccordé électriquement à la pompe de circulation, au capteur de débit et à la soupape à actionnement électrique ; dans lequel le système d'eau chaude comprend en outre
    une conduite d'eau froide (81) raccordée au premier orifice d'arrivée d'eau (11) de l'appareil d'eau chaude ;
    une conduite d'eau chaude (82) raccordée à l'orifice de sortie d'eau (12) de l'appareil d'eau chaude ; et
    une conduite d'eau de retour (83) présentant une extrémité raccordée au second orifice d'arrivée d'eau (13) de l'appareil d'eau chaude et l'autre extrémité raccordée à la conduite d'eau chaude (82), caractérisé en ce que
    la pompe de circulation (51) est capable de fonctionner en mode normal et en mode boost, et en ce que
    le dispositif de commande est configuré pour commander à la soupape à actionnement électrique (54) d'être fermée pour bloquer le débit d'eau dans la seconde section de tuyau (142) et d'activer la pompe de circulation (51) pour fonctionner en mode boost lorsque le dispositif de commande détecte qu'il y a un débit d'eau dans la première section de tuyau (141) via le capteur de débit (53).
  2. Système d'eau chaude selon la revendication 1, caractérisé en ce que le dispositif de commande est configuré en outre pour activer la pompe de circulation pour fonctionner en mode normal à la réception d'un signal de déclenchement, à ce moment, la soupape à actionnement électrique est commandée pour être dans un état ouvert, et l'eau est pompée à travers la seconde section de tuyau à l'intérieur de la conduite d'échange de chaleur.
  3. Système d'eau chaude selon la revendication 2, caractérisé en ce que l'appareil d'eau chaude comprend en outre un minuteur (71) raccordé électriquement au dispositif de commande ; lorsqu'un temps prédéfini est atteint, le dispositif de commande est configuré en outre pour recevoir ledit signal de déclenchement à partir du minuteur.
  4. Système d'eau chaude selon la revendication 2 ou 3, caractérisé en ce que l'appareil d'eau chaude comprend en outre un module de communication sans fil (72) raccordé électriquement au dispositif de commande, et le dispositif de commande est configuré en outre pour recevoir ledit signal de déclenchement via le module de communication sans fil.
  5. Système d'eau chaude selon la revendication 1 ou 2, caractérisé en ce que l'appareil d'eau chaude comprend en outre un capteur de température (52) disposé dans la conduite d'échange de chaleur ; et le dispositif de commande est configuré en outre pour détecter la température de l'eau au sein de la conduite d'échange de chaleur via le capteur de température et pour désactiver le fonctionnement de la pompe de circulation lorsque la température détectée atteint un seuil prédéterminé.
  6. Système d'eau chaude selon la revendication 1, caractérisé en ce que le dispositif de commande comprend une unité de commande d'appareil (61) et une unité de commande de pompe (62) raccordées électriquement à l'unité de commande d'appareil ; dans lequel l'unité de commande d'appareil est raccordée électriquement au capteur de débit et l'unité de commande de pompe est raccordée électriquement à la pompe de circulation et à la soupape à actionnement électrique.
  7. Système d'eau chaude selon la revendication 1, caractérisé en ce que la soupape à actionnement électrique comprend un moteur raccordé électriquement au dispositif de commande et une soupape engagée avec le moteur, dans lequel le moteur est entraîné par le dispositif de commande pour commander à la soupape de s'ouvrir ou de se fermer.
EP18178917.3A 2017-06-21 2018-06-21 Appareil d'eau chaude et système d'eau chaude l'utilisant Active EP3418649B1 (fr)

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CN201710540723.4A CN107461933A (zh) 2017-06-21 2017-06-21 热水设备和包含该热水设备的热水***

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