357results about How to "Stable water temperature" patented technology

The invention relates to a hatching device and method for demersal spawns of marine fishes. The hatching device comprises a net cage, a water channel, a bracket, a temperature controller indicator, a probe, a heating rod, a water inlet hose, a sinker, an air inlet hose, an air stone and an annular water injector, wherein the net cage and the bracket are located in the water channel; the net cage is bound on the bracket; the water inlet hose and the air inlet hose are located in the water channel outside the net cage; the upside of the net cage is provided with the annular water injector; and the probe and the heating rod are arranged in the water channel. The hatching method comprises the following steps of: controlling a hatching condition; hatching; carrying out microscopic examination observation; carrying out secondary water temperature controlling; managing routinely; collecting larva fish and the like. The hatching method has the advantages that spawn deposition is avoided because of conical point inflation; spawns adhered on net cage edges are washed at any time by the annular water injector; the net cage is conveniently replaced; the water temperature is stably controlled by an electric temperature controller; and the fresh water quality can be ensured due to water feeding and drainage modes of water feeding of the annular water injector at the upside and water feeding of the water channel at the bottom and overflowing of the periphery of the water channel. Therefore, by means of the hatching device and method, a hatching rate of the demersal spawns of the marine fishes in the industrial fry breeding is improved.

The invention relates to a large nuclear reactor molten pool natural-convection heat transfer test system and method. The system comprises a large molten pool natural-convection heat transfer test piece, a molten salt heating furnace supplying high temperature melt, a nitrogen source connected to the test piece and the molten salt furnace, and a cooling water loop. The test system also includes supporting power distribution equipment, instrument control equipment and data measurement and acquisition equipment. In the cooling water loop, a centrifugal water pump drives water in a cooling water tank to take away a decay heat source through a cooling channel of the test piece, heated cooling water restores to an initial water temperature through a plate heat exchanger and a cooling tower and then returns to the cooling water tank. When the molten pool temperature reaches a steady state, the test ends, and the waste liquid in the test piece is discharged into a waste liquid pool. The invention also provides a test method. By means of the large nuclear reactor molten pool natural-convection heat transfer test, molten pool heat transfer data under a reactor serious accident condition can be acquired for safety design.

The invention relates to a piston type water tank and belongs to the technical field of household appliances. The water tank is partitioned into two isolated spaces through a piston, heated hot water is isolated with and not mixed with newly fed cold water, and relative stability of water temperature is guaranteed. When the piston type water tank is used, a water inlet valve on one side (end A) of the heated hot water is closed, and a water outlet valve is opened; a water inlet valve of the other side (end B) of the heated hot water is opened, the water outlet valve is closed, the B-end inlet water pressure pushes the piston to move towards the A-end hot water (water outlet) side, and the hot water is pressed out. After the hot water is emptied, the A-end water inlet valve is opened, the water outlet valve is closed, cold water enters the tank, the hot water is pushed by the piston to be discharged out of the water outlet valve, the operation is conducted repeatedly, and constant water temperature is achieved. Compared with the prior art, no external power is needed, energy is saved, the size is small, and the cost is lower due to the pure mechanical structure.

The invention discloses a constant temperature flow control method for a heat pump water heater and a double-system unit using the same, relates to a fluid heater utilizing a heat pump and a control method thereof, and particularly relates to a constant temperature flow control method for the heat pump water heater and a double-system primary heating type heat pump water heater unit using the method. The double-system primary heating type hot pump water heater unit comprises a heat pump system A, a heat pump system B, a water supply heating system C and a constant temperature flow control device, wherein PID regulation on water flow is performed according to outlet water temperature; an outlet water temperature set value is set as a target value, and the opening of a constant temperature flow valve is controlled according to a checking value of the outlet water temperature so as to adjust the water flow; when the temperature of a water box is low, a constant temperature water pump and a compressor are started, and the unit operates at constant temperature; when inlet water temperature is too high, a bypass-valve is opened; and one system in a double-system generates a fault and stops operation, the outlet water set temperature is down-adjusted, the water flow of a heat pump unit is guaranteed, and the condensation effect and heating capacity and energy efficiency of the unit are improved, so that the other system without the fault is safely and stably operated in an efficient manner.

The invention relates to a phase-change energy-storage air-conditioning system. The phase-change energy-storage air-conditioning system structurally comprises a cooling tower, a cooling water circulating pump set, a refrigeration host, a terminal load, a chilled water circulating pump set and a cold-storage circulating system, wherein the refrigeration host comprises a condenser and an evaporator, and the cold-storage circulating system comprises a cold-storage tank, a variable-frequency water pump and a plurality of electric valves. The phase-change energy-storage air-conditioning system has the advantages that multiple kinds of cold-storage and cold-discharge modes can be transformed flexibly by means of controlling the electric valves to open and close, so that the refrigeration host is kept at the optimal energy efficiency ratio state to work, an optimal energy-saving effect is achieved, the 'power peak shaving and valley filling' performance is optimized, most stable chilled water outlet temperature can be obtained and the refrigeration performance is improved; meanwhile, the capacity of the refrigeration host can be expanded, the integral installed capacity and power supply equipment of the system can be decreased substantially, and a huge sum of initial installation fees can be saved; additionally, the phase-change energy-storage air-conditioning system is simple in structure, small in occupied space and quite convenient to apply.

The invention relates to a water temperature control method and device for engines. The water temperature control method comprises the following steps that the outlet water temperatures of the engines are acquired according to the preset time step; when the outlet water temperatures of the engines of which the quantity is larger than or equal to the preset quantity are acquired, according to the acquired outlet water temperatures of the engines and the corresponding acquired time of the outlet water temperatures of the engines, the water temperature variation function is determined; and the performance parameters of a cooling system based on the water temperature variation function is determined, and controllable parts of the cooling system are controlled according to the performance parameters of the cooling system. Through the adoption of the scheme provided by the embodiment, parts of the cooling system is controlled, accurate control of the water temperatures of the engines can be realized, and the water temperature is quickly stabilized.

The invention relates to a water temperature control method and a water temperature control device for a water heater. The water temperature control device comprises a temperature setting device, a gas proportional valve, a heater, a temperature detector, a water volume detector and an operation controller. The water temperature control method comprises the following steps that: the temperature setting device sets use temperature before the water heater is used; the temperature detector and the water volume detector immediately detect water inlet temperature and water flow when the water heater begins to run; the operation controller compares the difference between the water inlet temperature and the use temperature, calculates a gross thermal value required by the water flow from the water inlet temperature to the use temperature, and controls the gas proportional valve according to the gross thermal value to adjust gas quantity supplied to the heater, make inlet water stably raised to the use temperature and discharged, and maintain the water outlet temperature for stabilizing the water heater.

The invention discloses a continuative energy regulation control method of a single-screw compressor. The method comprises the following steps: firstly, a temperature control area is divided into a loading area, a maintaining area and an unloading area by using fuzzy control; in which area the temperature is located is determined by using a temperature control period as a unit and whether loading or unloading is performed is determined according to the located area; and finally, a compressor with the shortest operation time is selected for prior operation, and a compressor with the longest operation time is unloaded, so that all compressors are operated evenly. The method not only can enable a set to quickly reach a set temperature through the fuzzy control method with small overshoot, but also can stabilize a water outlet temperature in a certain range.

The invention provides a car fan control method and system. The method comprises the following steps: determining transmitter air volume requirements according to transmitter water temperature, current vehicle speed and environment temperature; combining auxiliary air volume requirement signals, such as gearbox oil temperature signal air volume requirements, heat energy management air volume requirements and attachment air volume requirements, according to the transmitter air volume requirements; determining the maximal fan air volume requirements to obtain the fan requirement rotating speed so as to control the fan. According to the scheme, the vehicle speed, the engine cooling liquid temperature and the environment temperature are used as the main factors for fan control, and meanwhile the gearbox oil temperature, the heat energy management and other attachments are combined to accurately control the rotating speed of the electric fan, so that the fan is in the low-speed operating state as far as possible, the water temperature of the engine is stable, the engine can work in the optimum operating temperature, and the functions of saving fuel and reducing emission are achieved.

A constant temperature valve core with dual stems and dual functions is provided. The constant temperature valve core with dual stems and dual functions includes a valve body, a return spring, a regulator, a water mixer, a temperature sensor, and a temperature regulating assembly. The return spring, the regulator, the water mixer, the temperature sensor, and the temperature regulating assembly are sequentially disposed in the valve body. The constant temperature valve core with dual stems and dual functions further includes a sheath and a flow rate adjusting assembly. The sheath is arranged around the valve body, and the flow rate adjusting assembly is slidably disposed between the sheath and the valve body. The present invention scientifically integrates the constant temperature function and the flow rate control function in a single valve core, so as to overcome the defect that a conventional constant temperature valve core has only one function and can be used only when being combined with other valve cores. Moreover, the present invention has the advantages of providing stable output water temperature, being safe and convenient, and easy to operate.

The present invention relates to an all-weather pressure-bearing type solar water heater free from water tank. It includes heat collector which is made up by series-connecting several glass evacuated collecting tubes by means of L-shaped flow-inducing tubes, on the cold water inlet tube of first collecting tube a non-return valve and a pressure switching valve are set, on the hot water outlet tube of tail end collecting tube a decompression safety valve is series-connected, and a temperature sensor is inserted into any one collecting tube of tail portion first to fourth collecting tube. Said solar water heater has the double function of heat collection and water storage.

The invention provides a control method and device for an electronic control silicone oil fan, the electronic control silicone oil fan and an engine. According to the control method, the altitude at which the engine works is obtained, the target rotation speed of the electronic control silicon oil fan installed on the engine is calculated based on the altitude, and then the rotation speed of the electronic control silicone oil fan is adjusted to the target rotation speed. According to the control method and device, the different air discharge qualities, caused by the change of the atmospheric pressure, of the fan, at different altitudes, corresponding to the same emitted heat are considered, the air discharge qualities of the electronic control silicone oil fan at different altitudes are controlled by adjusting the rotation speed of the fan based on the change of the atmospheric pressure, so that it is guaranteed the heat emitted by the electronic control silicone oil fan at different altitudes reaches a set value, and therefore it is guaranteed that the water discharge temperature of a cooling system of the engine is stable.

The invention provides a control method and a control system of a heat-pump water heater. The control method comprises the steps that firstly, the current external environment temperature, detected by a temperature-sensing element, of a hot water unit is obtained; according to the current external environment temperature and a heating capacity curve, current heating capacity of the hot water unit is determined; according to the current heating capacity of the hot water unit, the maximum output water temperature is determined; then, according to the difference value between the actual output water temperature and the maximum output water temperature of the hot water unit, the opening degree of a warm water valve is correspondingly controlled so as to control water flow in a real-time manner, so that operating states of elements in the hot water unit are reasonably adjusted, the aims of stabilizing the exhaust pressure and the output water temperature of the hot water unit are achieved, and the service life of the hot water unit is prolonged.

The invention relates to a lift long line windproof culturing method of pearl shell. A series of upright main lines are fixed by floats and weights in the culturing area and slip rings are arranged on the main lines. The slip rings are connected with each other by long lines and a pull rope is arranged on the slip ring. The whole pull rope and the pearl shells cultured on the pull rope can be risen or dropped under the action of pulling the pull rope upwards or the gravity actions of slip rings, pull rope and the pearl shells cultured on the pull rope. The windproof function can be achieved when the long lines drop down to the underlayer of the water body and the culturing management operations can be carried out when the long lines rise up to the surface layer of the water body.

The invention relates to a combined quick-heating heat exchanger, which comprises an inner container and an electric heater. A heating portion of the electric heater is positioned in the inner container, an electricity inlet portion of the electric heater is arranged outside the inner container, and a hot water outlet is arranged on the upper portion of the inner container. The combined quick-heated heat exchanger is characterized by further comprising an outer container and a heat-exchange coiled pipe, the outer container is sleeved outside the inner container and mutually sealed with the inner container, a closed sandwich space is arranged between the outer container and the inner container, a refrigerant inlet communicated with the sandwich space is arranged on one side of the outer container, and a refrigerant outlet communicated with the sandwich space is arranged on the other side of the outer container. The heat-exchange coiled pipe is coiled outside the inner container and positioned in the sandwich space, a water inlet of the heat-exchange coiled pipe is communicated with tap water, and a water outlet of the heat-exchange coiled pipe is communicated with a water inlet at the bottom of the inner container. The combined quick-heating heat exchanger has the advantages that the combined quick-heating heat exchanger is high in heat exchange efficiency, easy in load adjustment, quick in fluid heating start and stable in outputted fluid temperature, and a heating system is more efficient, safer and more comfortable.

The invention discloses double handles double functions thermo valve core. It includes valve body, back spring, adjustor, water mixer, temperature sensor, and temperature controlled package. And they are orderly set in the valve body. It also includes jacketing and flow controlled package. It has the advantages of safe, reliable, stable temperature, and simple operation.

The invention proposes an outdoor unit control system, a heat pump unit and a control method thereof. The outdoor unit control system comprises a refrigerant loop formed by serially connecting a compressor, a heat exchange element, a throttling device, a condenser and a separator; the throttling device includes a main throttling element, and at least one branch throttling element connected with the main throttling element in parallel; the branch throttling element is serially connected with an electromagnetic valve; the refrigerant loop is connected with a liquid spraying pipeline in parallel; an inlet end of the liquid spraying pipeline is arranged between the heat exchange element and the throttling device, and an outlet end is arranged between the condenser and the separator; and the liquid spraying pipeline is provided with a liquid spraying valve. The outdoor unit control system further comprises a controller; and the opening and the closing of the electromagnetic valve and the liquid spraying valve are controlled to adjust the flow and the temperature of a refrigerant entering the compressor to adjust the output capacity of an outdoor unit, so that the time of the water supply temperature reaching the highest set temperature is prolonged, the temperature reaching start and stop frequency of the outdoor unit is reduced, and the water supply temperature is stable.

The invention discloses a crystallizer cooling water control system and method. The system comprises a closed-loop circulating pipeline, a heat exchange cooling pipeline and a controller, wherein theclosed-loop circulating pipeline is formed by sequentially communicating a crystallizer, a water return pipeline and a water inlet pipeline; a temperature detecting device is arranged on the water inlet pipeline; the heat exchange cooling pipeline is used for performing heat exchange with cooling water in the closed-loop circulating pipeline, and comprises a water inlet main tube, a heat exchangerand a water return main tube; a heating medium inlet and outlet of the heat exchanger is connected onto the water return pipeline; a refrigerant inlet and outlet is connected to the water inlet maintube and the water return main tube through pipelines separately; a water amount regulating valve is arranged on the water return main tube; the controller is connected to the temperature detecting device on the water inlet pipeline; and opening degree of the water amount regulating valve is automatically regulated according to the detected water temperature data. The crystallizer cooling water control system can precisely control a cooling water temperature in the closed-loop circulating pipeline to be within a range of 30-35 DEG C, guarantees hot-flow stability of the crystallizer, and guarantees surface quality of casting blank.

The invention provides a heat supply and cold supply system capable of achieving solar energy and underground water combined energy supply. The heat supply and cold supply system comprises a solar energy heat collecting module, a phase-change heat storing module, a heat supplying and cold supplying terminal module and a temperature and humidity independent control air conditioner module; and different subsystems including a solar energy phase-change heat storing subsystem, a solar energy heat supplying and heating subsystem, a phase-change heating storing, heat supplying and heating subsystem,a solar energy temperature and humidity independent control air conditioner subsystem and a phase-change heat storing temperature and humidity independent control air conditioner subsystem can be formed by the modules through different port switching of four-way valves and three-way valves, and then the functions of heat storing in all year round, heat supplying and heating in winter and temperature and humidity independent control in summer are achieved. According to the system, the total functions are complete, control is flexible, adjusting is convenient, and the building energy saving effect is good.

The invention discloses an offshore drift line type net cage system. The system comprises a frame, net cages, anchor lines and iron anchors, wherein a main cable is connected with an auxiliary cable to form the frame, floats are bound on the main and auxiliary cables of the frame, two floats are separately bound on the two ends of the main cable; each net cage is bound at each net cage port in the frame, the net cages are arranged in single row and have 50-100m of group distance; the side rope and hanging rope of each net cage are bound on the corresponding positions of the main and auxiliary cables; the position near the central section of the net cover of the net cage is provided with a feeding opening, a float or floating body is bound at the feeding opening; the sinker of the net cage is bound on the bottom surface of the net cage and on the foot line of the position of the hanging rope; and the main anchor line is connected with the main iron anchor and the two ends of the main cable of the frame, and the auxiliary anchor line is connected with the auxiliary iron anchor and the main and auxiliary cables at the four corners of the net cage opening of the frame. The offshore drift line type net cage system has reasonable structure and layout, perfect supporting facilities, good wave and wind resistance, removable combination and convenient operation.

The invention discloses an automatic control method of the cooling capacity of an outer cooling unit. The outer cooling unit comprises M variable-frequency draught fans and N power frequency draught fans. The variable-frequency draught fans and the power frequency draught fans are controlled by logical circuits to be started or stopped. The automatic control method comprises the starting step and the stopping step; in the starting step, a valve inlet water temperature is compared with a valve inlet preferred temperature, and when the valve inlet water temperature is higher than the valve inlet preferred temperature, the variable-frequency draught fans and the power frequency draught fans are started through the logic circuits; and in the stopping step, the valve inlet water temperature is compared with the valve inlet preferred temperature, and when the valve inlet water temperature is lower than the valve inlet preferred temperature, the variable-frequency draught fans and the power frequency draught fans are stopped through the logic circuits. According to the automatic control method of the cooling capacity of the outer cooling unit, through the start and stop control over the M variable-frequency draught fans and the N power frequency draught fans and the comparison between the real-time water temperature and the valve inlet preferred temperature, the outer cooling heat exchange capacity is adjusted; and in this way, the power consumption is lowered, smooth adjustment of the outer cooling heat exchange capacity is guaranteed, and the adjustment amplitude of the outer cooling capacity is optimized.

The invention discloses a high-density fish and vegetable co-existing system which comprises fish tanks, a planting system and a water storage tank, wherein the planting system comprises hydroponic vegetable breeding grooves and river stone breeding beds; the fish tanks are connected with flow diversion tanks and a solid sewage separation tank; the solid sewage separation tank is connected with a bacterial sewage decomposition tank; the bacterial sewage decomposition tank is connected with the water storage tank; the water storage tank is connected with the flow diversion tanks through a water pump; the flow diversion tanks are connected with the planting system; the other end of the planting system is connected with the water storage tank through a pipeline. A fish breeding system is adopted for generating nutritional water, and the nutritional water is diverted into the planting system through the flow diversion tanks and provides normal nutrition for plant growth; large-scale high-density production can be realized and the efficiency is high; water subjected to multiple purification is relatively good in quality; breeding and planting system structures are independent; the co-existing system is simple in structure and convenient to manage and maintain; the breeding system is low in operation cost, low in energy consumption and environment-friendly; the co-existing system has the characteristics of simple structure, stability and convenience for mounting, maintenance and operation; diversity of culture of leaf vegetables and melon and fruit vegetables can be realized.

The invention discloses an intelligent feedback temperature-adjusting drinking water system which is a temperature control system combining frequency modulation and phase modulation. Four temperature-adjusting interruption control buttons are arranged, lower limit temperature values of 20 DEG C, 40 DEG C, 60 DEG C and 80 DEG C at corresponding gears are displayed when the buttons are pressed down; if a rotating coder is not used to tune to needed temperature values within five seconds, the lower limit temperature values at current gears are considered as target temperature values in a default manner; if the rotating coder is used for tuning within five seconds, temperature to which the rotating coder is tuned is considered as target temperature; when the target temperature is higher than actual water temperature by 5 DEG C, phase-modulating heating control which is efficient is performed, and when the target temperature is lower than the actual water temperature by 5 DEG C, PWM frequency-modulating heating control is performed to realize control of stepless temperature adjusting. The intelligent feedback temperature-adjusting drinking water system has the advantages of being higher in safety and reliability, more energy-saving and more convenient to operate.

Provided are an energy-saving control method and system for a river water source heat pump system. The method comprises the following steps that S1, building standard cold and heat energy consumptionlarge data are built; S2, according to the building function, energy using time and load distribution difference, by combination with the building standard cold and heat energy consumption large data,building refinement partitioning is conducted, a cold and heat energy requirement dynamic curve of all subzones of a building is generated, and the dynamic curve is updated once at fixed intervals; and S3, according to the cold and heat energy requirement dynamic curve of the building, the large hysteresis quality and nonlinearity of an air conditioner system are considered, the river water source heat pump system is divided into an equipment starting stage, a steady-state operation stage and an equipment halt stage, and staged control is conducted; and the temperature changes of river waterare monitored in real time, and when the temperature difference of inlet and outlet water of a river water source heat pump unit exceeds the set value, corresponding water pumps are controlled in a variable-frequency mode, and the water flow is adjusted. The invention further discloses the energy-saving control system for the river water source heat pump system. The energy-saving control method and system for the river water source heat pump system have the advantages of being high in efficiency, stable, free of pollution, small in energy consumption, remarkable in energy-saving effect and thelike.

The invention relates to an electromagnetic fan clutch structure for a diesel engine, in particular to a speed adjustable electromagnetic fan clutch structure with an independent controller. The speed adjustable electromagnetic fan clutch structure with the independent controller is used for adjusting the rotating speed of a radiating fan of the diesel engine. The invention belongs to the technical field of an engine. The speed adjustable electromagnetic fan clutch structure with the independent controller comprises an electromagnetic fan clutch and is characterized by further comprising a controller and a water temperature sensor, the controller is provided with a microprocessor, and an output end of the controller with the microprocessor is connected with the water temperature sensor, and the water temperature sensor is connected with the electromagnetic fan clutch. Signals such as water temperature, oil temperature of a torque converter and air-conditioning working state can be adopted so as to forecast various factors due to overflow water temperature, produce a control function in advance, and accordingly ensure stability of water temperature of a whole car. Meanwhile, the speed adjustable electromagnetic fan clutch structure with the independent controller is capable of reducing power loss of the diesel engine, reducing oil consumption of the whole car, and enabling the water temperature of the engine of the whole car to be always in a reasonable interval. The speed adjustable electromagnetic fan clutch structure with the independent controller is economic, practical, high-efficiency, and capable of meeting the requirement for mass production.

The present invention provides a solar energy heat utilizing system combining thermal diode and phase-change energy-storing materials, it is characterized by it combines the thermal diode technology and the phase-change energy-storing technology, at the same time utilizes them in solar energy heat utilization to provide life hot water for people. When solar radiation is absorbed by heat-collecting sheet, the temperature of heat-collecting sheet one side is increased swiftly, the temperature of phase-change materials in heat-storing device is relative lower, so the solar energy heat quantity is transmitted into heat-storing device through thermal diode to make phase-change materials absorb heat and unfreeze and store heat quantity; when life hot water is needed, tap water flows over the heat transferring coil pipe in phase-change materials, and absorbs heat quantity for warming-up. The system has simple structure, it is easy to be combined with buildings, due to the utilization of thermal diode technology and the phase-change energy-storing technology, the heat-collecting performance and thermal insulation performance of the system are improved greatly. Compared with all-glass vacuum tube solar water heating system, the system has characteristics of no freezing, bearing more, fast start, high sensitivity and fast heat transfer speed.

This invention relates to a no hot bladder drinking fountain including a shell, a water tank on the shell and a quick heater set in the shell, in which the tank is connected to an intake pipe connecting to the water inlet of the heater, the outlet is connected with the outtake pipe set with a hot water switch, said quick heater is connected with a supply switch, the outlet switch includes an outlet electromagnetic valve with a time delay function, said water fountain also includes a central temperature sensor head connected with a microcomputer control plate including: an accurate water-temperature control module used in sending instructions for setting delay time to the outlet valve.

The invention provides a method for ecologically culturing young crayfish in a rice field. The method includes the steps of firstly, ditching the rice field to form a grid ditch; secondly, screening out robust parent crayfish, and placing the selected parent crayfish into the rice field; thirdly, feeding the parent crayfish with feed capable of promoting gonad development; fourthly, dynamically regulating and controlling the water level of the rice field to induce the parent crayfish to dig holes, mate, lay eggs and hatch in the ditch; fifthly, during the harvesting of rice planted in the ricefield, controlling the height of left rice stubbles, and controlling water level to be lower than the height of the rice stubbles after water is filled into the rice field; sixthly, using natural bait and artificial feed in a combined manner to feed the hatched young crayfish in the rice field; seventhly, catching the young crayfish. By the method, ecological crayfish culturing can be performed in contiguous rice fields in a flat area, and large-scale batch production of young crayfish can be achieved.

An energy-saving low-carbon health safety instantaneous shower comprises an instantaneous electric heater, a shower energy-saving base and an energy-saving supercharging shower nozzle. A water outlet end of the shower energy-saving base is connected to a water inlet pipe of the instantaneous electric heater; a water outlet pipe of the instantaneous electric heater is connected to a water inlet of a shower nozzle; and the shower energy-saving base is arranged under the energy-saving supercharging shower nozzle. The surface temperature of the heating inner cavity does not exceed 60 DEG C, the heater is difficult to scale and the periodic de-scaling process is unnecessary. The invention has a function of automatically removing air bubble from the water and can prevent the local parch and the scald caused by overheating. The invention has the advantages of obvious energy-saving effect, large water amount, strong impact and stable water temperature. The heater heats by the flowing water so no stagnant water exists for multiplying bacteria. The foot can be massaged while user has a bath so the bathing is safe and comfortable. The bathing waste water and waste heat are fully utilized so as to lower the power for heating. The mounting power wire can use national standard 2.5mm power wires to supply power without changing the wires.

The invention discloses a water chilling unit and a water temperature control method thereof. The water temperature control method of the water chilling unit comprises the steps that control precisionis set; water temperature of the water chilling unit is detected; load deviation is calculated according to the water temperature; the relationship between the load deviation and the control precision is judged; and the frequency of a compressor of the water chilling unit is adjusted or maintained. According to the water chilling unit, stable frequency modulation of the water chilling unit can becarried out according to the water temperature, and stable water supply temperature is realized.