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
  • F24H9/2007—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
  • F24H9/2028—Continuous-flow 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
  • F24D17/02—Domestic hot-water supply systems using heat pumps
• • 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
  • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
• • 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
  • F24H15/219—Temperature of the water after 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
  • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
  • F24H15/375—Control of heat pumps
  • F24H15/38—Control of compressors of heat pumps
• • 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
  • F24H15/375—Control of heat pumps
  • F24H15/39—Control of valves for distributing refrigerant to different evaporators or condensers in heat pumps
• • 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 invention relates to an instant water heater, and to a water heater which is heated by a heat pump.
• the instant water heater is also called a fast or fast-heating water heater. Its characteristics ⁇ cold water and hot water are discharged. As long as the water outlet valve is opened, the energy source continuously supplies hot water in a short time. When no hot water is used, the water outlet valve is closed. The water can be stopped in a short time by cutting off the water path.
• the current instant water heaters are mostly electric heating and gas.
• the principle of the electric heating type instant water heater is to rapidly heat the cold water flowing through the heating zone with a relatively high-power electric heater, so that the predetermined use temperature is quickly reached, and the cold water is supplied to the hot water for the purpose of cancellation.
• the water storage device on the heat storage type water heater for example, the volume of the water storage device of the household electric water heater is generally up to several tens of liters), so the volume is small and the installation is convenient.
• the water consumption is not limited by the storage water amount and temperature, and can be used immediately, so it is more convenient than the heat storage type water heater.
• its ready-to-use features eliminate the need to heat and store the stored water during standby, which greatly saves energy consumption and is more energy-saving and environmentally friendly.
• the electric heating type instant water heater does not have installation conditions in some circuit environments due to its high power, and its heat conversion efficiency is not satisfactory due to the characteristics of electric heating.
• Gas-fired hot water heaters are also widely used, but the gas (natural gas, liquefied petroleum gas or water gas) used is non-renewable energy, so it is a waste of valuable natural resources, and gas-fired water heaters are not fully burned. For other reasons, there is a risk of carbon monoxide poisoning.
• Air energy water heaters also known as air source heat pump water heaters, are a type of water heater that has sprung up in recent years.
• the principle is to use the refrigerant in the heat pump of the water heater to absorb the low-temperature heat energy in the air, and then convert it into high-temperature heat energy after compression by the compressor, thus The water is heated. Due to the heat transfer by the heat pump, the water heater has the characteristics of high efficiency and energy saving. It has been reported that its energy saving effect is four times that of the electric water heater and three times that of the gas water heater.
• the air energy heat pump heating system used in the existing air energy water heater generally consists of three parts. - is the main part, the second is the water tank part, the third is the heating system part; for the household type water tank, !
• the capacity is generally 150-320L.
• the water tank is bulky. It needs to occupy a large part of the building area when installing. Even if some water tanks are installed outside the wall by brackets, this type of installation is quite dangerous due to the weight of the water tank itself. 2.
• the heat exchanger inside the tank generally uses copper tubes.
• the present invention provides an instant water heater comprising a controller, a water circuit and a heat pump to recycle the road;
• the waterway includes, in order of water flow direction, a water inlet, a heating part and a water outlet;
• the heat pump circulation circuit includes: a compressor, an evaporator, a condenser, a throttle device, the compressor is connected to a controller, the condenser includes a heating condenser and a pressure relief condenser, and the heating condenser is The heating portion in the water path is in thermal conduction contact, the heating condenser and the pressure relief condenser are arranged in parallel in the heat pump circulation circuit, and the heating condenser valve is arranged in the branch where the heating condenser is located, and the pressure is condensed in the pressure relief.
• the branch where the device is located is provided with a pressure relief condenser valve, and the heating condenser valve and the pressure relief condenser valve are connected with the controller;
• the controller is used for controlling the opening and closing of the compressor, the heating condenser valve and the pressure relief condenser valve.
• the heating condenser valve is kept open; when the compressor needs to be shut down, the compressor is judged Whether the running time is greater than the preset time, if yes, turn off the compressor; if not, close the heating condenser valve, open the pressure relief condenser valve, and let the compressor continue to run for a preset time before shutting down the compressor.
• the instant water heater comprises a fan, and the evaporator and the pressure relief condenser are located in the same air duct formed by the fan.
• the evaporator and the pressure relief condenser are thermally connected by a heat sink.
• the evaporator and the pressure relief condenser are integrally expanded by copper tube fins.
• the instant water heater further includes an outlet water temperature sensor, and the outlet water temperature sensor is connected to the controller for detecting the water outlet temperature of the water flow in the waterway;
• the controller is configured to open the pressure relief condenser valve when the water heater supplies hot water and the outlet water temperature sensor detects that the outlet water temperature is higher than the set pressure relief temperature.
• heating condenser valve and the pressure relief condenser valve are electromagnetic valves.
• the running time of the compressor is judged, and the comparison of the preset time includes the current number, that is, if the time interval during which the compressor is continuously operated is greater than or equal to the preset value, the compressor is turned off; Otherwise, close the heating condenser valve, open the pressure relief condenser valve, and let the compressor continue to run for a preset time before shutting down the compressor.
• the instant water heater of the present invention is different from the heat storage heat pump water heater.
• the water storage heat pump water heater is statically heated most of the time, so when the heat pump system is working, most of the time is at a higher condensation temperature (or condensing pressure), and this paper
• the instant water heater adopts dynamic heating mode when using water, and the condensing temperature (or condensing pressure) is low during operation, so the heat pump efficiency is higher, the heat pump system does not operate too badly, and the life of the compressor is longer.
• the compressor When the compressor is turned on, a large part of the refrigerating machine oil in the compressor will be discharged out of the compressor along with the refrigerant. If the refrigerant system has not completed multiple cycles, the refrigerating machine oil will stay in the system piping and condenser and evaporate. In this way, if the compressor has less oil in the compressor at the start of the next compressor, it will reduce the lubrication of the compressor. If the engine is started for a long time, it will affect the life of the compressor. In order to solve the oil return problem caused by the short-time operation of the unit, I used the pressure relief condenser branch to extend the running time of the unit appropriately, so as to achieve the purpose of oil return.
• the control connection in the present invention means that the controller and the controlled component are in such a connection relationship: the control signal sent by the controller enables the controlled component to complete the action corresponding to the control signal.
• the mechanical connection or the electrical connection relationship may be direct or indirect.
• the controller may directly send an electrical signal to control the opening and closing of the solenoid valve, but the controller may also control the air pump through the electrical signal first, and then the air pump passes The air pressure controls the opening and closing of the pneumatic valve.
• the hot water heater Because the water heater often encounters the problem of opening the waterway or closing the waterway when switching the waterway, the hot water heater is different from the heat storage water heater, and does not have a large-capacity water storage device, so the hot water heater is The heating device often needs to be turned on or off frequently, and the air pump can provide the heat source by the heat pump cycle.
• the refrigerant fluid in the heat pump circuit after the shutdown needs a certain time to achieve the pressure balance, if the pressure of the refrigerant fluid in the circuit has not reached the equilibrium.
• the instant water heater of the present invention is provided with a parallel heating condenser and a pressure relief condenser in a portion of the condenser in the heat pump circulation circuit, and valves are respectively provided to control the communication state of the two branches.
• the branch where the heating condenser is located is turned on, so that the high temperature and high pressure refrigerant is condensed, and the water heating part is supplied with heat.
• the compressor has insufficient working time, but does not need to supply hot water, stop heating the condenser to heat the water heating part by turning off the branch where the heating condenser is located, and turn on the pressure relief condenser to continue the heat pump cycle. Cycle, until the preset working time is reached, then turn off the compressor, thus avoiding the damage caused by the emergency stop of the compressor.
• FIG. 1 is a schematic view of a structural module according to a specific embodiment of the present invention.
• FIG. 2 is a schematic structural view of a specific embodiment of the present invention.
• Fig. 3 is a schematic view showing the structure of an evaporator and a pressure relief condenser connected through a heat sink according to an embodiment of the present invention.
• the embodiment provides an instant water heater including a controller, a water circuit and a heat pump circulation circuit;
• the waterway includes, in order of the water flow direction, a water inlet 6, a heating portion 3 and a water outlet 5;
• the heat pump circulation circuit includes: a compressor] U evaporator 18, a condenser, a throttle device 7, the compressor is connected to a controller, and the condenser includes a heating condenser 4 and a pressure relief condenser 19,
• the heating condenser is in thermal conduction contact with the heating portion in the water passage, the heating condenser 4 and the pressure relief condenser 19 are arranged in parallel in the heat pump circulation circuit, and the heating condenser valve 2 is disposed in the branch where the heating condenser is located,
• the branch where the pressure condenser is located is provided with a pressure relief condenser valve 14, and the heating condenser valve 2 and the pressure relief condenser valve 14 are connected to the controller;
• the heating condenser is in thermal conduction contact with the heating portion, and the condenser may be placed in the heating portion to directly exchange heat with the water in the space inside the heating portion by heat conduction; or the condenser may be attached to the heating portion pipe or the container.
• heat exchange is performed by heat conduction between the pipeline and the outer wall.
• the heat exchanger can also be a coil heat exchanger.
• the water inlet 6 is connected to the inlet valve 204, the outlet is connected to the outlet valve 203, and the outlet valve can be connected to external water components such as the shower 201 or the bath 302.
• the heat pump circuit starts from the compressor and is divided into two parallel condenser branches: the branch where the condenser is heated and the branch where the pressure relief condenser is located, as follows:
• the branch where the heating condenser is located includes heating the condenser valve 2, heating the condenser 4, the filter 10, and the expansion valve 11;
• the branch where the pressure relief condenser is located includes a pressure relief condenser valve ⁇ 14, a pressure relief condenser 19, and a pressure relief capillary 17;
• the throttle device 7 in the above embodiment includes the expansion valve 11 and the pressure relief capillary 17.
• the controller is used for controlling the opening and closing of the compressor, the heating condenser valve and the pressure relief condenser valve.
• the heating condenser valve is kept open; when the compressor needs to be shut down, the compressor is judged Whether the running time is greater than the preset time, if yes, turn off the compressor; if not, close the heating condenser valve, open the pressure relief condenser valve, and let the compressor continue to run for a preset time before shutting down the compressor.
• the instant water heater includes a fan, and the evaporator and the pressure relief condenser are located in the same air duct formed by the fan.
• the fan is composed of a motor 15 and a vane 16, and the airflow blown by the vane passes through the evaporator 18 and the pressure relief condenser i9.
• the pressure relief condenser 19 When the pressure relief condenser 19 is operated, the airflow passes through the evaporator. Cooling, low-temperature airflow through the pressure relief condenser greatly enhances the heat dissipation effect of the pressure relief condenser, so that the overall heat engine cycle efficiency is improved, which helps to improve energy utilization and also helps to reduce equipment load.
• the gas stream may also be heated by a pressure relief condenser, and the evaporator is heated by the high temperature gas stream to increase the evaporation effect of the evaporator, which also provides equipment efficiency.
• the evaporator and the pressure relief condenser are integrally formed by a copper tube-fin.
• the pressure relief condenser interface 19! is connected to the compressor discharge pipe, the evaporator interface 181 is connected to the compressor gas-liquid separator, and the evaporator interface 182 is connected to the pressure relief condenser.
• the pressure relief condenser interface 192 is respectively connected with the pressure relief capillary 17 and the filter 10, and the coil 50 is connected between the two interfaces of the pressure relief condenser, and the same evaporation
• a coil 50 is also connected between the two interfaces of the device, and the coils 50 are connected by fins 30 to facilitate heat conduction. If the fan is used to dissipate heat from the fins, the effect is better.
• the instant water heater further includes an outlet water temperature sensor 7, and the outlet water temperature sensor 7 is connected to the controller for detecting the outlet water temperature of the water flow in the waterway;
• the controller is configured to open the pressure relief condenser valve when the water heater supplies hot water and the outlet water temperature sensor detects that the outlet water temperature is higher than the set pressure relief temperature.
• the pressure relief condenser valve is opened to allow the pressure relief condenser to work. Unloading part of the heat pump capacity also helps to reduce the operating load of the compressor and reduce the energy consumption. At the same time, it avoids the fact that the compressor is turned off due to excessive water temperature. However, after the water temperature fluctuates, it is necessary to quickly open the compressor to avoid frequent opening and closing of the compressor and adversely affect the unit.

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Citations (15)

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• 2012
  • 2012-12-25 CN CN201210574853.7A patent/CN103900251B/zh not_active Expired - Fee Related
• 2013
  • 2013-07-23 DE DE112013000851.3T patent/DE112013000851B4/de not_active Expired - Fee Related
  • 2013-07-23 US US14/362,158 patent/US20150345829A1/en not_active Abandoned
  • 2013-07-23 WO PCT/CN2013/079861 patent/WO2014101396A1/zh active Application Filing
  • 2013-07-23 JP JP2014553608A patent/JP5782572B2/ja not_active Expired - Fee Related
  • 2013-07-23 AU AU2013350340A patent/AU2013350340B2/en not_active Ceased

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