305results about How to "Constant water temperature" patented technology

The invention provides a constant-temperature gas heater control method and a constant-temperature gas heater. The constant-temperature gas heater comprises a main control panel, a heat exchanger, a combuster, a water inlet pipe and a water outlet pipe, and further comprises a bypass pipe. The bypass pipe is connected with the water inlet pipe and the water outlet pipe, and is provided with a bypass water server. An outlet of the heat exchanger is provided with a first temperature sensor. An outlet of the water outlet pipe is provided with a second temperature sensor. The first temperature sensor, the second temperature sensor and the bypass water server are respectively in electric connection with the main control panel. The bypass pipe is arranged between the water inlet pipe and the water outlet pipe, the bypass pipe is provided with the bypass water server, and the main control panel controls the bypass water server to operate to adjust water flow of the bypass pipe according to temperature information collected by the first temperature sensor and the second temperature sensor, so the water outflowing temperature of the water outlet pipe is constant, the situation that hot water at exceedingly high temperature is output is avoided, the water outflowing temperature of the constant-temperature gas heater is constant, and comfort and safety of the constant-temperature gas heater are improved.

The invention relates to a water cycle filtering system for aquiculture, which comprises an ozone treatment system, a mechanical filtration system, a biological filtration system, a liquid-oxygen conversion system and an oxygen saturation system, wherein all systems are communicated through gas pipelines or liquid transport pipelines. In the overall system, the aquaculture water is circularly treated in 24 hours, the aquaculture waste water is treated and then fed into an aquaculture pond again to be used, and the water changing ratio every day is only 3 percent; and the system has the advantages of constant water temperature, good water quality in dynamic water aquaculture, low water consumption in static water aquaculture, and the like. Equipment generates basically enough heat to insulate a fishery so as to save energy; the aquaculture waste is reclaimed for producing organic fertilizer so as to change waste into valuable; the system can achieve zero discharge of the aquiculture, and a water environment achieves pathogen free, waste residue free and pollution free and keeps enough oxygen content of the water body; and the system does not use fishery drugs to cultivate, and is a green, environment-friendly, energy-saving and low-cost aquiculture water treatment system.

Disclosed herein is a water / powdered milk mixing device, capable of mixing water and powdered milk, which are independently stored, at a predetermined concentration when a mixing switch is manipulated. The device has a water heating means (11) for heating water stored in a water storage container. The water heating means and a temperature sensor are controlled by a control unit (50). A predetermined amount of water is dispensed from the water storage container using a water supply pump, and the driving speed of a powdered-milk dispensing means (21) is controlled so that an amount of powdered milk corresponding to the concentration set using a concentration-control-switch is continuously dispensed to a powdered-milk outlet (22). Further, a mixing switch (40) is provided to control the ON / OFF operation of a water supply pump and the powdered-milk dispensing means, thus allowing a user to set the dispensed amount of mixed milk as desired.

The invention discloses a gas water heater constant temperature control method which comprises the following steps: starting a gas water heater; collecting a plurality of water flow data; according tothe collected water flow data, judging whether the current water flow has circulating fluctuation; if yes, calculating the average value of a plurality of groups of water flow data to obtain the current demanded load; controlling the gas water heater to heat according to the current demanded load obtained through calculation; collecting a plurality of groups of flow data once more; and accordingto the collected water flow data, judging whether the current water flow is stable. The gas water heater constant temperature control method is simple and reliable, so that the gas water heater can ensure that the water outlet temperature is relatively constant when the water flow has circulating fluctuation.

The invention provides a solar heat collector system. The system comprises a heat collector, wherein the heat collector comprises a heat collection tube and a water tank, the heat collection tube comprises a heat absorbing end and a heat release end, and the heat release end is arranged in the water tank; temperature sensors are arranged in the water tank and used for measuring the temperature of water in the water tank, an inlet tube valve and an outlet tube valve are arranged on an inlet tube and an outlet tube of the water tank respectively, and the temperature sensors, the inlet tube valve and the outlet tube valve are in data connection with a central controller; the central controller controls opening and closing of the inlet tube valve and the outlet tube valve according to the temperature measured by the temperature sensors. The temperature of the water in the water tank is detected, and opening and closing of the valves are controlled, so that the temperature of the water in the water tank meets the heat utilization requirement.

The invention belongs to the field of native fish farming studies, and relates to an efficient breeding method for Rhodeus sinensis. The problems that an existing breeding technology is greatly influenced by seasons, temperature, hydrology and other natural conditions, and the breeding potential is not high are solved. The Rhodeus sinensis is bred ceaselessly in the whole year, and is high in breeding potential and easy to manage, and factory-like breeding can be carried out. The method comprises the steps of domestication breeding of parent fishes and clams, copulation of the parent fishes and offspring seed breeding, and is characterized in that the parent fishes and Unio douglasiae are collected in the field, domestication treatment is carried out for 30 days, female fishes with fallopian tubes extending to be tubular and male fishes with seminal fluid flowing out by slightly pressing the bellies are selected, the female fishes and the male fishes are placed in a specially-made breeding box with the ratio of 3:1, the clams are put in at the same time, the clams are placed in an incubator after 20 days of oviposition, the other batch of clams is placed in the breeding box, the clams in the breeding box are exchanged with the clams in the incubator every 20 days, Rhodeus sinensis offspring seeds in the incubator are collected once every two days and placed in the breeding box to be bred, and normal breeding is carried out when fish fries grow to be 30 mm.

The invention discloses a lift type massage bathtub structure for disabled old people and a method for applying the lift type massage bathtub structure. The lift type massage bathtub structure is characterized in that an inner skirt board is fixed onto a bottom frame of a lifting platform, the bottom frame of the lifting platform is arranged at the bottom of the lifting platform, a bathtub body is carried on a top frame of the lifting platform, the top frame of the lifting platform is arranged on the top of the lifting platform, an outer skirt board sleeves the inner skirt board and is fixed to the outer edge of the bathtub body, the bathtub body and the outer skirt board can be carried by the lifting platform to be lifted in the vertical direction relative to the inner skirt board, and a vertical stretcher strut is arranged on the bottom frame of the lifting platform. The lift type massage bathtub structure for the disabled old people and the method for applying the lift type massage bathtub structure have the advantages that a bathtub in the design is of a lifting structure, accordingly, the lift type massage bathtub structure and the method bring convenience for populations unable to freely move during bath, the nursing difficulty can be relieved for nursing staffs, burden on bathers and nursing personnel can be relieved, and the life quality of the bathers can be improved.

The invention discloses an air source heat pump floor heating system which comprises a circulating water module, an air source heat pump, a heating water tank, a tail end floor heating module, a water pump, an electric heating module, an electromagnetic valve, an expansion tank, a temperature sensor and a controller. An inlet of the circulating water module is connected with the expansion tank, the expansion tank is connected with an inlet of the water pump, an outlet of the water pump is connected with an inlet of the air source heat pump, and an outlet of the air source heat pump is connected with an inlet of the heating water tank. According to the air source heat pump floor heating system, the frequency of the adopted water pump can be automatically adjusted according to the probability of indoor opening, the main engine starting and stopping frequency caused in the circumstance of the large heating capacity of an indoor low load device can be easily reduced, the speed of decreasing of the overall water temperature can be reduced in a defrosting mode, the floor can be heated more rapidly in the primary heating period of a floor heating system, waiting time of users is shortened, and the pressure of the system cannot be reduced in the circumstance that outside water pressure is insufficient.

The invention discloses a constant temperature device which comprises a water storage device, a constant temperature assembly, a first detection module, a second detection module, a third detection module and a control module. The water storage device is internally provided with a heater. A first water inlet of the constant temperature assembly is connected with a water outlet of the water storage device; a second water inlet of the constant temperature assembly is externally connected with a water supply pipe; and a water outlet of the constant temperature assembly is used for being externally connected with a water use end. The first detection module is used for detecting the water temperature of the water outlet of the constant temperature assembly. The second detection module is used for detecting the temperature of the first water inlet of the constant temperature assembly. The third detection module is used for detecting the temperature of the second water inlet of the constant temperature assembly. The control module is used for controlling the constant temperature assembly according to the temperature of the water outlet, the temperature of the first water inlet and the temperature of the second water inlet so as to adjust the water inlet proportions of the first water inlet and the second water inlet, and therefore the water temperatures of the water outlets can meet the water use demands at the water use end. The constant temperature device can automatically adjust the water outlet temperature according to the water temperature needed by a user and keep the water outlet temperature constant. The invention further discloses a hot water system and a control method of the constant temperature device.

The invention provides a constant-pressure water tank. The constant-pressure water tank comprises a columnar water tank shell made of an insulating material, wherein the lower part of the water tank shell is provided with a water outlet, the upper part of the water tank shell is provided with a water inlet, and the top of the water tank shell is provided with a pressure release valve; a water storage cavity body in the water tank shell is internally provided with an insulating piston capable of sliding longitudinally along the water storage cavity body, and the water storage cavity body is divided into an upper cold water cavity and a lower hot water cavity by the insulating piston; the lower part of the hot water cavity is connected with the upper part of the cold water cavity by a connecting pipe; the connecting pipe is internally connected with an electric control pump capable of pumping water in the cold water cavity into the hot water cavity in series; the cold water cavity is also internally provided with a temperature sensor which is electrically connected with the electric controller of the electric control pump; and when the temperature of the electric controller in the cold water cavity is higher than a preset value and the water pumping resistance is less than a preset value, the electric control pump is driven to operate, or the electric control pump is closed. The constant-pressure water tank provided by the invention has the advantages that the constant water pressure can be maintained at the water outlet of the water tank, so that the stable water discharging effect at the water consuming end is guaranteed.

The invention discloses a low-temperature acid dew point corrosion experimental device for power station boiler flue gas. The low-temperature acid dew point corrosion experimental device comprises an experimental platform, a flue gas experimental pipeline, a pitot tube manometer, a cooling system, a heating system, an induced draft fan, a measurement and collection system and a control system, wherein the inlet end and the outlet end of the flue gas experimental pipeline are communicated with a rear flue of a boiler air pre-heater, the pitot tube manometer is arranged at the inlet end of the flue gas experimental pipeline, a first high temperature heat exchanger, a second high temperature heat exchanger, a low temperature heat exchanger and an experimental segment heat exchanger, which are connected in series, are arranged on the flue gas experimental pipeline along the flue gas flow direction, and the cooling system is used for cooling passed flue gas and cooling flue gas in the experimental segment heat exchanger to a low-temperature acid dew point corrosion experimental temperature of 70 DEG C. The experimental device is used for solving the low temperature corrosion problem of a low-temperature economizer for the boiler flue gas and providing the theoretical foundation and the technical support for the popularization and application of novel corrosion resistant materials.

The invention discloses a water supply system. The water supply system comprises a gas water heater, a plurality of cold water outlet pipes, a plurality of water storage tanks, a first hot water outlet pipe, a plurality of second hot water outlet pipes and a controller. A first water inlet of the gas water heater is communicated with a water source through a cold water inlet pipe. The cold water outlet pipes are communicated with the cold water inlet pipe. An electric heater is arranged on each water storage tank, and a first water outlet is communicated with second water inlets of the water storage tanks through a plurality of hot water conveying pipes. The first hot water outlet pipe is communicated with the first water outlet. The second hot water outlet pipes are communicated with a plurality of second water outlets respectively. The controller is respectively in communication with the gas water heater and the electric heaters. The water supply system has the advantages of being constant in output water temperature, high in hot water outlet speed, small in environment influence, free of cold water in pipelines, capable of outputting the water out of a plurality of water utilization points, large in flow and the like.

The invention discloses a solar heat storage heating system. The solar heat storage heating system comprises a solar heat collection device, a heat storage water tank and a heating room. A heating device is arranged in the heating room. A heat exchange coil is arranged in the heat storage water tank. The solar heat collection device is connected with the heat exchange coil. A heat collection return water pipe is provided with a heat collection circulating pump. The water storage water tank is connected with the heating device in the heating room. A heat supply circulating pump is arranged on aheat supply water inlet pipe. The solar heat storage heating system stores excessive heat generated by the solar heat collection device during daylight in the heat storage water tank and conducts heating supply through stored solar energy at night, so that solar energy is utilized more effectively and fully. The invention further discloses a heating control method of the solar heat storage heating system. The heating control method comprises a heat storage method and a heat using method. The heating control method conducts distinguished control according to the thermal inertia of the heatingdevice. Accurate adjustment on the heating water temperature is realized easily and conveniently through an electric three-way ball valve and bypass pipelines on the basis of slow water temperature change of the heat storage water tank.

The invention relates to a domestic normal pressure heat pump water heater and a control method thereof. The domestic normal pressure heat pump water heater comprises a heat preservation water tank, a heat exchanger, a heat pump system, an electric three-way adjusting valve, a water pump, a flow sensor and a water level sensor; the electric three-way adjusting valve is provided with an a end opening, a b end opening and a c end opening; the a end opening is communicated with a water outlet hole of the heat preservation water tank; the b end opening is communicated with a water flow channel through a water pump; the c end opening is communicated with a water inlet pipe; the flow sensor is arranged at the b end opening; the water level sensor is arranged inside the heat preservation water tank; a pressure switch, a water flow switch and a hot water outlet pipe are arranged between a water outlet hole of the heat preservation water tank and the a end opening. The domestic normal pressure heat pump water heater can control a water pump and achieve circulating heating operation in combination with the water level, the water pressure and the water flows and also can control the water flowing speed through the electric three-way adjusting valve to directly heat water entering the heat exchanger to be in the set temperature and store the water to the heat preservation water tank to enable the water outlet temperature and the water pressure to be constant.

The invention discloses a constant-temperature water tank for a water cooling chiller performance testing system. The constant-temperature water tank comprises a tank body, an overflow cavity, a longitudinal clapboard and a transverse clapboard, wherein the tank body is divided into a heat releasing area, a mixing-balancing area and a constant-temperature control area by the longitudinal clapboard and the transverse clapboard; the lower side of the transverse clapboard is provided with a first notch which is adjacent to the overflow cavity and communicated with the heat releasing area and the mixing-balancing area; the lower side of the longitudinal clapboard is provided with a second notch which is adjacent to the side wall of the tank body and communicated with the constant-temperature control area and the heat releasing area; and the lower side of the longitudinal clapboard is also provided with a third notch which is adjacent to the side wall of the tank body and communicated with the constant-temperature control area and the mixing-balancing area. Without extra special stirring measures, the constant-temperature water tank can be used for supplying constant-temperature inflow water for a tested chiller refrigerant water way and a cooling water way of the water cooling chiller performance testing system.

The invention discloses a water chilling unit control method. The method comprises the following steps that (1) the chilled water inlet and outlet temperature difference Ymax in the full load state is detected; (2) the initial value X of the target chilled water outlet temperature is determined according to the chilled water inlet and outlet temperature difference Ymax in the full load state and is used as an initial parameter of a water chilling unit for control; (3) the indoor required load is detected regularly, and when the indoor required load changes, the current chilled water inlet and outlet temperature difference Y corresponding to the current indoor required load is detected; (4) a new target chilled water outlet temperature X current is computed; and (5) control is conducted according to the new target chilled water outlet temperature X current. According to the water chilling unit control method, when the indoor required load is lowered, through a mode of lowering the chilled water outlet temperature, decrease of the temperature difference is offset, then the effect that the water inlet temperature is constant is ensured, the water inlet temperature directly reflects the sendible temperature, and thus comfort is not influenced.

A thermostatic control valve comprises a valve body with a cold and hot water inlet and a mixing water outlet, a thermal sensitive element positioned in the valve body and a piston driven by the thermal sensitive element; the piston can adjust the inflow of the cold and hot water inlet; wherein, at least two groups of cold and hot water inlets are arranged from top to bottom of the valve body and at least two pistons controlling the cold and hot water inlets are arranged in the valve body; one of the pistons is fixed with the thermal sensitive element; a driving spring which ensures the distance between adjacent pistons is arranged between pistons. The thermal sensitive element expands or contracts under the condition of change of water outlet temperature, thus driving the pistons to move up and down, increasing or reducing the cold and hot water inlets and adjusting the cold and hot water inflow to facilitate the water outlet temperature to be constant. The cold and hot water inlets are increased on the valve body, thereby realizing the function of big flow; linked by the driving spring, a plurality of pistons can move synchronously under the circumstance of ensuring temperature adjustment. The driving spring has the function of compensating the dimension error so as to improve the safety of effluent of the thermostatic control valve.

The invention discloses an instant waste heat recycling heating unit and a water outflow thermostatic control method of the heating unit, and relates to a fluid heater using a heat pump and a control method of the fluid heater, in particular to the instant waste heat recycling heating unit and the water outflow thermostatic control method of the heating unit which are used for a waste heat comprehensive utilization system. The instant water heat recycling heating unit comprises a double-system heat pump, a water inlet electromagnetic valve, a thermostatic control valve and a water / water heat exchanger used for primary heat recovery, wherein the double-system heat pump comprises a first compressor, a second compressor, a first throttling valve, a second throttling valve, an evaporator, a first gas-liquid separator, a second gas-liquid separator and a condenser. By means of steam recycling with heat, the fact that refrigerants before throttling are supercooled is guaranteed, the suction temperature of a product is increased, heating capacity of the product is improved, and damage caused by liquid impact to the compressors is prevented. According to the relation of water tank water temperature, waste water temperature and set water temperature, due to the fact that the thermostatic control valve carries out a PID algorithm, openness of the thermostatic control valve is controlled, water flow is adjusted, and therefore the water tank water temperature keeps constant when the waste water temperature fluctuates.

The invention belongs to the technical field of constant temperature control of cooling towers, and particularly relates to a constant temperature control system for a closed cooling tower. The constant temperature control system for the closed cooling tower comprises a cooling tower, a blower in the upper part of the tower and a water distribution device at the bottom of the cooling tower, and is characterized in that the blower is a frequency conversion blower, a water outlet of the water distribution device is connected with a temperature sensor, a water temperature signal of the water outlet is converted into a frequency conversion signal through a temperature controller and a frequency converter and sent to the frequency conversion blower to control the wind speed in real time. The constant temperature control system for the closed cooling tower provided by the invention can control the rotating speed of the blower in real time in a frequency conversion manner according to the water temperature, and not only maintains the water temperature constant under less investment, but also saves a lot of energy sources because the cooling tower is a continuous working device. The constant temperature control system for the closed cooling tower provided by the invention has the advantages of simple structure and convenience in maintenance.

The invention discloses a floor heating system with a variable-frequency air source heat pump. The floor heating system is characterized by comprising a variable-frequency air source heat pump host machine, a variable-frequency internal machine and a radiant floor heating system arranged below indoor floor, wherein the variable-frequency air source heat pump host machine internally comprises a variable-frequency compressor and variable-frequency electric control equipment, and a refrigerant backflow connector and a refrigerant output connector are arranged on the variable-frequency air source heat pump host machine; the radiant floor heating system comprises a water pipe, the water pipe is arranged at the bottom of the floor and arranged into an S shape, a water inlet of the S-shaped water pipe is connected with a floor heating water supply pipe, and a water outlet of the S-shaped water pipe is connected with a floor heating water return pipe; a plate heat exchanger, a water pump and indoor electric control equipment are arranged on the variable-frequency internal machine. The floor heating system with the air source heat pump has the advantages of super-high energy efficiency, good environment friendliness, high safety, comfort, the capability of realizing intelligent control and the like.

The invention discloses an intelligent bathing system and a control method. The intelligent bathing system comprises a water heater, a water inlet pipeline, a throwing device, a water outlet pipeline, a bathing foam outlet pipeline, an electronic water outlet switch and a control module. A water inlet of the water inlet pipeline communicates with a water outlet of the water heater. A water outlet of the water inlet pipeline communicates with a water inlet of the water outlet pipeline and a water inlet of the bathing foam outlet pipeline through electronic water outlet switches correspondingly. The intelligent bathing system further comprises a water temperature adjusting device used for adjusting the water inlet temperature in the water inlet pipeline, and a water outlet switch is arranged on the water outlet pipeline. By means of the intelligent bathing system and the control method, the control module is used for automatically adjusting the water temperature and controlling a liquid pump to throw bathing foam into the bathing foam outlet pipeline, meanwhile, an electronic control switch is controlled to make clean water and the bathing foam flow out from different sizes of pipelines, complete automation of the bathing process is achieved, and the bathing comfort degree and the use experience of a user are improved.

The invention discloses a constant-temperature control method of a gas water heater. The gas water heater applies the constant-temperature control method in the embodiment to calculate a heat conversion relation through collection of the heat energy conversion relation, calculation is performed through a water transfer algorithm in different water flow environments to judge the state of the current water flow, so that the current value and the gear value output by a proportional valve are calculated according to the change condition of the water flow, the opening degree of the gas proportionalvalve is controlled according to the current value and the gear value output by the proportional valve so that the water outlet temperature can be close to the preset target temperature, and constant-temperature control over the gas water heater is achieved. The method is simple and reliable, the constant water outlet temperature of the gas water heater can be kept in different water flow environments, and therefore good bathing experience is brought to users.

The invention relates to an energy conservation control method of a constant-temperature water supply fixed-frequency heat pump hot-water heating system. The energy conservation control method is characterized in that the energy conservation control method of a control system comprises the following steps: a basic function formula among a water supply calculated temperature Tgj of a heat pump, an indoor set temperature Tsd and an outdoor environment temperature Tw is established, a first correction function formula calculated according to the water supply calculated temperature Tgj of the heat pump is established, and a second correction function formula calculated according to the water supply calculated temperature Tgj of the heat pump is established; by controlling the start-stop of a compressor of a fixed-frequency heat pump water heater, a water supply actual temperature Tgs is made to be 0-1 degree higher than the water supply calculated temperature Tgj obtained according to the second correction function formula; and the control system adjusts a water supply to water return proportion of a three-way proportioning valve through a deviation between detected water supply actual temperature Tgs and the water supply calculated temperature Tgj, so as to allow the water supply actual temperature Tgs and the water supply calculated temperature Tgj to tend to be consistent. The energy conservation control method has the advantages that the differences of heat preservation characteristics and hot water coil laying of different buildings is considered fully, automatic judgment and correction are carried out in an operating process, the energy conservation effect is more obvious, the supply water temperature is constant, and the temperature fluctuation of a room is small.

The invention discloses a gas water heater with a water regulating proportional valve in a bypass pipe and relates to the field of water heaters. The gas water heater with the water regulating proportional valve in the bypass pipe includes a housing; the housing is internally provided with a heat exchanger, a combustion tank, a fan, a gas proportional valve, a water inlet pipe, a water outlet pipeand a water regulating proportional valve; the bypass pipe is arranged between the water inlet pipe and the water outlet pipe, and the water regulating proportional valve is arranged on the bypass pipe; the housing is internally provided with a main controller which receives the signals of a temperature sensor I, a water flow sensor, a temperature sensor II and a temperature sensor III, and instructions are sent to the water regulating proportional valve by the main controller; by adding the water regulating proportional valve in the bypass pipe and being matched with a control system, the water flow can be measured, and the water flow can be adjusted and controlled; and the functions of closing an opening and cutting off the water flow are achieved to solve the shortage in the prior art.

The invention relates to a household normal-pressure heat-pump water heater. The household normal-pressure heat-pump water heater comprises a heat-preservation water tank, a heat exchanger, a heat-pump system, an electric three-way adjustment valve, a water pump, a flow sensor and water level sensors. The electric three-way adjustment valve is provided with an end opening (a), an end opening (b) and an end opening (c). The end opening (a) communicates with the heat-preservation water tank; the end opening (b) communicates with an inlet of a water flow channel through the water pump; and the end opening (c) communicates with a water inlet pipe. The flow sensor is arranged at the end opening (b). The water level sensors are located inside the heat-preservation water tank. A pressure switch,a water flow switch and a hot water outlet pipe are arranged between a water outlet of the heat-preservation water tank and the end opening (a). The household normal-pressure heat-pump water heater can be combined with the water level, the water pressure and the water flow to control the water pump, and cyclic heating operation is achieved; and the water flow velocity can also be controlled through the electric three-way adjustment valve so that water entering the heat exchanger can be heated to the set temperature and stored into the heat-preservation water tank, and therefore, the water outlet temperature and the water pressure can be constant.

The invention disclose a foot-bath machine, and belongs to the field of home appliances. The foot-bath machine is mainly subjected to the following structures: a water supply system, which is connected to a water source, is arranged on a machine body; a drainage pipe is arranged on the machine body; a drainage pump is arranged on the drainage pipe; the water supply system comprises a water injecting port which is connected to a water source; a hot water pipeline and a cold water pipeline are connected to the water injecting port; a heater is arranged on the hot water pipeline; a confluence boxis connected to the hot water pipeline and the cold water pipeline; a temperature sensor is arranged in the confluence box; a water discharging pipe for adding water to a barrel body is arranged on the confluence box; a first control valve is arranged on a part where the hot water pipeline and the confluence box are connected; a second control valve is arranged on a part where the cold water pipeline and the confluence box are connected; a third control valve is arranged on the water discharging pipe; an essential oil adder is arranged on a stand; the essential oil adder comprises a pluralityof oil storage drums filled with various essential oils, a capillary dropper which communicates with the outlet ends of the oil storage drums, pistons which are arranged in the oil storage drums andelectric push rods for driving the pistons to do axial motions along the oil storage drums; and the capillary dropper communicates with concave cavities.

The invention discloses a hard-pipe type water outlet and return device in the same well for a water source heat pump central air conditioner. A wellhead of the same water source well is provided with a well cover in a sealing way, and is provided with a water outlet pipe and a water return pipe, wherein the outer side of the water outlet pipe is sleeved with a water outlet pipe sleeve to form a composite water outlet pipe, and the water outlet pipe and the water outlet pipe sleeve are formed by butting steel pipes and are antiseptically treated. The groundwater is pumped out by a submersible pump through the water outlet pipe to the central air conditioner, and pressure is exerted into the water return pipe. A plurality of water return spaces arranged in the water source well seep outwards and downwards and exchange heat through an annular seepage layer and a soil layer. An equal amount of effluent water and returned water is realized in the same water source well, and fully exchanges heat with soil, so that the efficiency of a water source heat pump unit can be substantially improved. The water is not polluted, and the groundwater is not wasted; the direct heat exchange between effluent water and returned water is thoroughly eliminated, so that the constancy of effluent water temperature is kept. Therefore, the water resource is not avoided, and the situation that the groundwater level drops or even dries up due to movement is avoided, so that the stability of an underground structure and the security of surrounding buildings are ensured.

The invention discloses a closed type circulating water breeding method of hexagrammos otakii. The method includes the steps of selecting a breeding water source, establishing a breeding environment, controlling the breeding density and the breeding water temperature, adjusting the breeding water quality, adjusting and controlling breeding water oxygen dissolution, selecting and putting in breeding bait, managing breeding sub-ponds, and preventing and controlling breeding diseases. An oxygen and water mixer is added to the tail end of a water processing device, an oxygen dissolution probe and an emergency gas chamber are added in a breeding pond, and an ultraviolet lamp box is communicated between a biological pond and the oxygen and water mixer. The breeding environment is controllable, closed type circulating water processing facilities are complete, the continuous optimism of the breeding environment is ensured, the water temperature is controllable, the fluctuation of the breeding water temperature is avoided, matched feed is put in, bait waste is avoided, the bait coefficient is decreased, the breeding economic benefits are improved, fish separating operation is conducted at the right moment according to the breeding conditions, polarization is avoided, the yield is increased, the breeding cycle is shortened, the time to market can be controlled, and economic benefits are improved.

The invention discloses an electric water heater, an ignition point complementation water heating system and a control method thereof. The electric water heater comprises a liner, a main heater, a water feeding heater and a temperature flow sensor, wherein an electrothermal water inlet and an electrothermal water outlet are formed in the liner; the main heater is arranged in the liner; the water feeding heater is arranged in the liner and is positioned at the electrothermal water inlet; the temperature flow sensor is arranged at the electrothermal water inlet. According to the electric water heater disclosed by the embodiment of the invention, the influence of cold water in the pipeline on the water temperature can be reduced, and the electric water heater has the advantages of constant discharged water temperature, high comfortableness and the like.

An energy-saving water-saving device of a gas water heater with a vacuum heat-preservation water tank is formed by a gas water heater (6), a valve IV (4), a valve V (5) and a profibus onsite bus (16) and is characterized in that a central processing unit transmits control signals to control opening and closing of the valve IV (4) and the valve V (5) according to water level or water temperature requirements in a vacuum heat-preservation water tank (7) through the profibus onsite bus (16), determines cold water adding time and ignition heating time of the gas water heater, enables temperature of water input in the vacuum heat-preservation water tank to keep constant and cuts off water leakage of a water outlet pipe through an automatic locking valve III (3). By means of the automatic locking valve III, the vacuum heat-preservation water tank, the control panel, the central processing unit and the like, the energy-saving water-saving device of a gas water heater shortens waiting time of users in the using process of hot water, keeps water temperature at the user end constant, achieves the aim of saving energy and water and has actual application and popularization value.