39results about How to "Adjustable heating power" patented technology

The invention relates to a large multifunctional environmental simulator for electrical tests, which comprises an environmental stimulation chamber and is characterized in that an air heat-exchange circulation system and an ice-melting system are arranged in the environmental stimulation chamber; and the environmental stimulation chamber further comprises an ice-coating, rain-exposing and ultrasonic-atomizing system, a water treatment system, a heat-fogging system, a cooling water circulation system, a refrigeration system, a vacuuming and defogging system, a measurement and control system and an ultra-high voltage power supply system for providing a high-voltage charging state for test-pieces. By achieving the skillful coordination among the systems and the uniform operation control by the measurement and control system, the large multifunctional environmental simulator integrates various testing functions of environmental simulations, such as high-altitude, ice-coating, contamination, rain-exposing and other simulations into a whole. Therefore, the invention is widely suitable for the testing process for large multi-parameter environmental simulations.

The present invention relates to a method for detecting the identity of a pot on a cooking point of a hob and system of a hob with a pot. A set of a hob with a hob plate and a cooking point at the hob plate together with a pot, wherein the hob has at least one heating element placed underneath the hob plate and wherein the cooking point is provided with a pot sensing means for detecting presence of a pot on the cooking point, wherein the hob also has a control and receiving means connected to the control, wherein the pot is provided with a temperature sensor and a transmitter attached to it, wherein the transmitter is transmitting at least two sets of data, wherein the first set of data is an individual pot identifier and the second set of data is related to the temperature state of the pot being measured by the temperature sensor.

The invention discloses a micro chromatographic column tank which comprises a tank body, capillary column heating frame set in the tank, capillary column bound around the frame, a heating device set on the inner wall of the frame, a precise thermo resistor and a temperature control system set out of the tank. The capillary column heating frame employs metal alloy material; the capillary column employs quartz material; the heating device is flexible electrical heating membrane coated on the inner wall of the frame; the temperature control system includes a temperature control module, the precise thermo resistor connects with the signal input terminal of the temperature control module, the output terminal of the temperature control module connects with the insulating single-phase alternative current modulator module of which one end of the output terminal connects with the heating device, and the other end of the output terminal connects with the input power.

The invention relates to a system and a method for rigid wire clothing quenching using YAG laser. The system includes: mounting beam enlarging lens, wholly reflective lens according to the YAG laser light path, reflective light entering into light guiding cartridge through light hole of work platform, other port of light guiding cartridge is connected with adjusting ring, adjusting ring is connected with focusing head, upper work platform is fixed on the low work platform, low work platform is fixed to ground, positioning device and cooling box is fixed to the low work platform, focusing head is in between, rigid wire clothing is fixing to movable mechanism of positioning device, the other end of rigid wire clothing pass through cooling box, controlling cabinet is mounted to ground, laser power resource and other bang-bang circuit is mounted in the controlling cabinet. Switching the laser power, YAG laser beam exported from laser is enlarged through beam enlarging lens, reflected by wholly reflective lens, focused by focusing lens in teeth of rigid wire clothing, form a high energy density light spot. That light spot energy is absorbed by teeth means thus the rigid wire clothing is quenched.

The embodiment of the invention discloses an optical fiber wiredrawing annealing device. The device can be used for processing optical fiber preforms. The optical fiber wiredrawing annealing device comprises a graphite wiredrawing furnace, a buffer cylinder disposed at the upper end of the graphite wiredrawing furnace, and an annealing furnace disposed at the lower end of the graphite wiredrawingfurnace, wherein the upper end of the buffer cylinder is provided with a sealing member; a shaped graphite tube is disposed in the graphite wiredrawing furnace; a glass guiding tube is disposed in theannealing furnace; and a graphite connecting pipe for connecting the shaped graphite tube with the glass guiding tube is further disposed in the graphite wiredrawing furnace. According to the opticalfiber wiredrawing annealing device provided by the embodiment of the invention, a spiral heating wire is mounted in the annealing furnace, the thread pitch of the heating wire is linearly increased from top to bottom, the heating power of the heating wire can be adjusted, and a predetermined control requirement can be met according to the feedback of a temperature thermocouple, therefore, an expected temperature gradient in an annealing tube can be obtained, the annealing speed and the temperature reduction gradient in the furnace after formation of the optical fiber are guided, and the acquisition of the optical fiber with small internal stress, small attenuation and good warpage is facilitated.

The invention provides a multilayer heating unit PTC heater. The multilayer heating unit PTC heater comprises a shell, a water inlet is formed in the lower surface of the shell, a water outlet is formed in the left side of the shell, and a PTC heating unit is arranged in the shell. The multilayer heating unit PTC heater is characterized in that the direction of the PTC heating unit and the direction of water flowing into the water inlet are the same. Water flowing into the multilayer heating unit PTC heater is heated, and the heating purpose is achieved through the PTC heating unit installed in the multilayer heating unit PTC heater. The PTC heating unit is composed of a plurality of PTC ceramic heating elements, and a corresponding number of PTC ceramic heating elements can be arranged according to different requirements. Meanwhile, the multilayer heating unit PTC heater can further achieve the constant-temperature heating function through a water switch and a heat preservation switch. Compared with a heater with defects in the current market, the multilayer heating unit PTC heater has the advantages of being high in safety performance, adjustable in heating power, capable of performing constant-temperature heating and portable and has high market value.

The invention discloses a chamber washing device and method and semiconductor processing equipment. The chamber washing device comprises a washing plasma source and a uniform flow piece connected withthe washing plasma source, wherein a heating strip is arranged on the uniform flow piece and forms a plurality of concentric ring structures on the surface of the uniform flow piece; and the heatingpower of the concentric ring structures can be adjusted to selectively enable the uniform flow piece to have a plurality of different temperature zones, so that after the washing technology is finished, the temperature at each part of the uniform flow piece is ensured to rapidly recover to the set temperature, the temperature uniformity can rapidly meet the requirement, the cooling time after finishing the washing technology can be further shortened, and the deposition rate and the film uniformity during the following deposition technology are improved.

An embodiment of the present application discloses a heating method, a device and a frequency converter of an electric motor. The method comprises the following steps of: acquiring a high-frequency alternating current output from an inverter to a motor; Based on the preset calculation formula, the actual heating power and the corresponding actual current amplitude are calculated according to the high frequency alternating current. Obtaining a given heating power and performing an adjustment limiting process on the given heating power and the actual heating power to obtain an injection currentfrequency; Integrating the injected current frequency to obtain a voltage vector angle; Obtaining a given current magnitude and performing an adjustment limiting process on the given current magnitudeand the actual current magnitude to obtain an adjustment voltage magnitude; Inputting a voltage vector angle and a regulated voltage amplitude to a preset pulse width modulator to generate a pulse width modulated signal; The inverter is controlled to output high frequency AC current to the motor according to the pulse width modulation signal to heat the motor. The method in this embodiment can improve the heating speed of the motor and realize the adjustable heating power.

The invention discloses a supercritical water crude oil dissolution observation device and a dissolution degree detection method. Visible windows communicated with a reaction cavity are formed in thetwo sides of a reaction kettle body. A visual mirror is arranged in the visual window to realize visualization of the reaction cavity of the reaction kettle body. Meanwhile, the heating box body is used for heating the reaction kettle body. Light holes coaxial with the visible window in the reaction kettle body are formed in the box body walls on the two sides of the heating box body. The reactioncondition in the reaction kettle body can be acquired through the camera to obtain a supercritical reaction image. A dissolving process image of the crude oil during the period that the water is heated from the normal temperature to the supercritical state can be obtained. Observation of dissolution of the crude oil in the supercritical water is achieved, the in-situ observation of the dissolution condition of the crude oil in the supercritical water in the heating process is obtained by comparing the gray values of the pixel points in the reaction image with the minimum gray value of the dissolution of the crude oil in the supercritical water, the method is simple, and the detection result is accurate.

The invention provides an electric heating kettle power control circuit, method and system and an electric heating kettle. The electric heating kettle power control circuit comprises a heating module and a power control module, wherein the heating module is connected to an alternating signal, the heating module comprises a temperature controller unit and a heater unit connected in series, and the temperature controller unit is used for controlling the working state of the heater unit; the power control module is connected in series into a loop where the heating module and the alternating signal are located, and the power control module comprises a one-way breakover device and a power switch component connected in parallel. Through the electric heating kettle power control circuit, the total-power and half-power adjustments of the power of the electric heating kettle can be achieved, in addition, the dangers such as electric fire are effectively avoided, a user can choose independently between the total-power rapid heating and half-power low-noise heating according to needs, and the user experience is improved.

The invention relates to the technical field of glass, in particular to an automobile windshield capable of defrosting and defogging, and particularly provides a laminated glass with a transparent conducting film. The laminated glass comprises a first bended glass plate, a second bended glass plate, an intermediate layer and the transparent conducting film. The transparent conducting film is provided with a first heating zone and a second heating zone, and at least one strip-shaped heating zone is arranged in the second heating zone; each strip-shaped heating zone is composed of strip-shaped transparent conducting films between two parallel separated film removing lines; and the strip-shaped transparent conducting film is provided with at least one bending section capable of changing the direction of a current. According to the laminated glass with the transparent conducting film, the problem of the design of conventional and complicated electrodes and film removal can be solved, the heating zone is enabled to be more accurate and the heating power is adjustable, and any size of zones requiring heating can be heated, for example, a windscreen wiper stay zone is heated, heating other unnecessary areas are not required, thus the waste of energy is avoided.

The invention discloses a drying device of a printer. The drying device comprises a tank, a heating unit, a transmission unit, a cooling unit and a control unit, wherein the tank comprises a tank topand a tank bottom; the tank top is of a crisscross structure; the tank bottom is of a rectangular structure; a groove is formed in one side of the tank bottom; the control unit is mounted at the tanktop; the heating unit is electrically connected with the control unit; the heating unit and the cooling unit are mounted at the tank bottom side by side; the heating unit and the cooling unit are separated by using a steel plate; a paper transferring through hole is formed in the steel plate; the transmission unit is mounted in the groove and adopts the gear chain transmission mode; and the cooling unit is in signal connection with the control unit. As an improvement aimed at the problem that a conventional drying device is uncontrollable in drying temperature and short of a cooling device, the drying device disclosed by the invention has the characteristics that the heating power and the cooling air volume can be adjusted, the efficiency is high, and the adaptability is high.

The invention relates to a greenhouse soil temperature adjusting pipeline and device. The greenhouse soil temperature adjusting pipeline comprises support rings, support ribs and dense mesh cloth; thesupport rings are distributed at equal intervals, the support ribs are bundled outside the support rings at equal intervals, and the dense mesh cloth wraps the support ribs. The greenhouse soil temperature adjusting device comprises the temperature adjusting pipeline, an outlet of the temperature adjusting pipeline extends out of a soil layer, an inlet of the temperature adjusting pipeline is connected with an air inlet pipe, two air inlets are formed in the air inlet pipe, one air inlet is formed between two layers of heat preservation film of a greenhouse, the other air inlet is formed in the greenhouse, a switching valve is arranged between the two air inlets, and an electric heating section is arranged on the air inlet pipe. According to the greenhouse soil temperature adjusting pipeline and device, high-temperature air naturally formed in the indoor top space and an electric heating device are utilized to provide a heat source, and then hot air is introduced into a heating pipeline in soil through a pipeline fan. By comprehensively utilizing the functions of equipment of adjusting the air inlets, the wind speed and the heating power, the purpose of maintaining soil temperature is achieved.

Ribbed steel bar short-circuit heat treatment equipment and a heating power supply thereof belong to the field of steel bar manufacturing. The reinforcing steel bar short-circuit heat treatment equipment comprises a plurality of modules, each module comprises two sets of reinforcing steel bar guide rollers, the two sets of reinforcing steel bar guide rollers are connected with a positive electrode and a negative electrode of a heating power source respectively, each set of reinforcing steel bar guide rollers comprises an upper roller and a lower roller, and carbon brush drums are fixedly arranged on the peripheries of rotating shafts of the upper roller and the lower roller respectively. The heating power supply is respectively communicated with the upper roller and the lower roller through the carbon brushes, and the positive electrode of the heating power supply and the negative electrode of the heating power supply are short-circuited through the reinforcing steel bars and simultaneously heat the reinforcing steel bars. The method can reduce heat loss, reduce production energy consumption, shorten production process length, reduce production cost, improve product performance indexes and improve product market competitiveness.

The invention provides a heat performance test device and a heat performance test method for a heat pipe under vacuum. The device comprises a vacuum tank, a cold plate, a vacuum air extracting system, a refrigeration system and a heating system, wherein the vacuum tank is connected with the vacuum air extract system, the refrigeration system and the heating system respectively through flange connection openings in the surface of the vacuum tank; the cold plate is arranged in the vacuum tank; the vacuum air extracting system is used for extracting air from the vacuum tank, so that the vacuum tank reaches a vacuum degree required by a space environment experiment; the refrigeration system provides refrigeration liquid for the cold plate, thus realizing temperature control on the cold plate and ensuring that the surface temperature of the cold plate is uniform; a heating sheet of the heating system is arranged in the vacuum tank. According to the heat performance test device, a novel refrigeration mode replaces a conventional cooling water cooling mode, so that the test temperature region for the heat pipe is greatly expanded, the requirement of the heat performance test of the heat pipe for the temperature of the space environment is met, the heat performance test temperature range of the heat pipe is expanded, and the heat performance test precision of the heat pipe is improved.

The invention discloses an electric cooking device, a control circuit of the electric cooking device and a cooking method of the electric cooking device. The control circuit of the electric cooking device comprises N+1 coil disc modules, a power module, N switch modules, N+1 power switch drive modules and a controller; the first end of each switch module is connected with the power module, the second end of the ith switch module is connected with the ith coil disc module, the third end of the ith switch module is connected with the (i+1)th coil disc module, and i is equal to 1,2,3,...,N; the controller comprises N+1 power switch drive ends and N switch control ends; each power switch drive end is correspondingly connected with the corresponding power switch drive module, and each switch control end is connected with the fourth end of the corresponding switch module; and according to the control circuit, through control over the number and the combined type of working coils, the heating power of the electric cooking device is adjusted, the electric cooking device can work at a lower power, and the adjustable range of the heating power of the electric cooking device is wide.

The invention relates to a system and a method for rigid wire clothing quenching using YAG laser. The system includes: mounting beam enlarging lens, wholly reflective lens according to the YAG laser light path, reflective light entering into light guiding cartridge through light hole of work platform, other port of light guiding cartridge is connected with adjusting ring, adjusting ring is connected with focusing head, upper work platform is fixed on the low work platform, low work platform is fixed to ground, positioning device and cooling box is fixed to the low work platform, focusing head is in between, rigid wire clothing is fixing to movable mechanism of positioning device, the other end of rigid wire clothing pass through cooling box, controlling cabinet is mounted to ground, laser power resource and other bang-bang circuit is mounted in the controlling cabinet. Switching the laser power, YAG laser beam exported from laser is enlarged through beam enlarging lens, reflected by wholly reflective lens, focused by focusing lens in teeth of rigid wire clothing, form a high energy density light spot. That light spot energy is absorbed by teeth means thus the rigid wire clothing is quenched.

The invention relates to the technical field of garbage treatment equipment, in particular to kitchen garbage treatment equipment. The kitchen garbage treatment equipment comprises a box body and a dry and wet material separation device arranged in the box body. The dry and wet material separation device comprises a dry and wet material separation device motor, a water collecting disc, a support,a draining screen, a water squeezing screen and a dry and wet material separation device rotating shaft, and the draining screen communicates with the water squeezing screen. The dry and wet materialseparation device rotating shaft is assembled and connected with the support through two sets of shaft sleeves, one end of the dry and wet material separation device rotating shaft is in transmissionconnection with an output shaft of a dry and wet material separation device motor, the other end of the dry and wet material separation device rotating shaft sequentially penetrates through the draining screen and the water squeezing screen, and a spiral conveying plate is arranged on the outer side of the dry and wet material separation device rotating shaft. According to the kitchen garbage treatment equipment, a graded dry and wet separation mechanism is adopted, so that the cost and energy consumption caused by additionally arranging a hydraulic cylinder or an air cylinder in the prior artare greatly reduced.

The invention relates to a plastic outer knurling machine of a high-frequency induction heating type steel tube for a handrail. The plastic outer knurling machine is used for coating of metal tubes with various materials and sections, and is particularly used for knurling the handrails coated with the steel tubes of vehicles such as buses, school buses, tourist buses and metros, and guardrails coated with the steel tubes of environmental facilities such as parks and markets by plastic outer layers. The plastic outer knurling machine is composed of an inlet pipe station, a pinch device driven by a variable-frequency and variable-speed motor, a high-frequency induction pre-heating device, an infrared temperature measuring device, a plastic outer knurling device, a flow control air cooling device, an outlet pipe station and a control system. The plastic outer knurling machine is simple in structure, reliable to work, even in pre-heating temperature, and convenient to adjust. The plastic outer knurling machine has outstanding characteristics that the production efficiency is improved; the energy consumption is reduced; and the production cost is lowered, and the product quality is also improved.

The invention relates to an environment-friendly indirect type roller heating device with heat preservation. The environment-friendly indirect type roller heating device with heat preservation comprises a heat preservation cover (2) and a roller (1) arranged in the heat preservation cover (2), wherein supporting wheels (9) which support and rotate the rotation of the roller (1) are arranged on theouter wall of the roller (1); a wire heater (5) is arranged on the outer wall of the roller (1), and the wire heater (5) is distributed on the roller (1) in a multi-point mode; and material guide blades (10) for stirring materials are arranged in the roller (1). A double-layer cylinder structure is adopted in the heating roller, an outer cylinder (provided with a barrel cover) is used for heat preservation, and an inner cylinder is used for heating. An external type is adopted in heating, heating units are arranged in a multi-point mode, a cylinder body is uniformly heated, and an asphalt mixture is heated through conduction and radiation, so that the temperature of the regenerated asphalt mixture is uniform, the gradation and the asphalt-aggregate ratio do not change obviously, and the quality of the asphalt mixture is ensured to a greater extent.

The invention discloses an electric heating method of liquid metal, the liquid metal flows through a test pipeline and test equipment, the method comprises the following steps: S1, dividing the field test pipeline and test equipment into regions to obtain a plurality of sub-regions, S2, calculating the thermal load of the liquid metal in the test pipeline or test equipment corresponding to each sub-region; s3, arranging a plurality of heating wires for heating liquid metal in the test pipeline or the test equipment outside the test pipeline or the test equipment in each sub-region, wherein the plurality of heating wires are connected in parallel; and S4, each sub-region is provided with a junction box, and the heating wire of the sub-region is connected with the junction box of the sub-region. And S5, the solid-state relay conducts or cuts off the heating wire, and the liquid temperature is made to be within the set range. According to the invention, a plurality of low-power heating loops are used for heating, the heating is uniform, the power is adjustable, non-stop maintenance and replacement can be conveniently realized when a fault occurs on site, and the device is suitable for the condition of narrow or irregular site space.

The invention discloses a boiling water or steam generating device capable of rapidly heating by utilizing a heating pipeline. The boiling water or steam generating device comprises a water pump, a communication container, a heating pipeline, a first relay, a second relay, a boiling water starting switch, a boiling water heating switch, a steam starting switch, a steam heating switch and a selection control circuit; the boiling water or steam generating device capable of rapidly heating by utilizing the heating pipeline is characterized in that the boiling water starting switch and the boilingwater heating switch are installed in a higher position in the communication container, and a first group of control switch is formed; the steam starting switch and the steam heating switch are installed in a lower position in the communication container, and a second group of control switch is formed; the steam heating switch is located in the vicinity of the half height of the heating pipeline;the selection control circuit selects one of the first group of control switch or the second group of control switch to work; and further comprises an air control part which is arranged in the communication container, the air control part occupies most of the volume of the communication container, and a flow channel of a water inlet and a water outlet is formed by the gap between the air controlpart and the communication container; and the water level of the communication container can be quickly adjusted when the selection of the device have conversion between the boiling water and the steam.

The invention relates to a plastic outer knurling machine of a high-frequency induction heating type steel tube for a handrail. The plastic outer knurling machine is used for coating of metal tubes with various materials and sections, and is particularly used for knurling the handrails coated with the steel tubes of vehicles such as buses, school buses, tourist buses and metros, and guardrails coated with the steel tubes of environmental facilities such as parks and markets by plastic outer layers. The plastic outer knurling machine is composed of an inlet pipe station, a pinch device driven by a variable-frequency and variable-speed motor, a high-frequency induction pre-heating device, an infrared temperature measuring device, a plastic outer knurling device, a flow control air cooling device, an outlet pipe station and a control system. The plastic outer knurling machine is simple in structure, reliable to work, even in pre-heating temperature, and convenient to adjust. The plastic outer knurling machine has outstanding characteristics that the production efficiency is improved; the energy consumption is reduced; and the production cost is lowered, and the product quality is also improved.

The invention relates to the technical field of glass, in particular to an automobile windshield capable of defrosting and defogging, and particularly provides a laminated glass with a transparent conducting film. The laminated glass comprises a first bended glass plate, a second bended glass plate, an intermediate layer and the transparent conducting film. The transparent conducting film is provided with a first heating zone and a second heating zone, and at least one strip-shaped heating zone is arranged in the second heating zone; each strip-shaped heating zone is composed of strip-shaped transparent conducting films between two parallel separated film removing lines; and the strip-shaped transparent conducting film is provided with at least one bending section capable of changing the direction of a current. According to the laminated glass with the transparent conducting film, the problem of the design of conventional and complicated electrodes and film removal can be solved, the heating zone is enabled to be more accurate and the heating power is adjustable, and any size of zones requiring heating can be heated, for example, a windscreen wiper stay zone is heated, heating other unnecessary areas are not required, thus the waste of energy is avoided.

The invention provides a method for controllable synthesis for zirconium molybdate ultra-thin nanosheets by microwave radiation method with the assistance of a structure-directing agent, wherein during experimental process, a zirconium molybdate sheet-shaped two-dimensional nanometre material is controllably prepared under the action of a microwave field by using zirconium nitrate and ammonium molybdate as raw materials, using polyethylene glycol as a surfactant, and using distilled water as a solvent. Test indicates that the ultra-thin nanosheets are 60 to 90 nanometres in thickness and 3 to 6 microns in diameter. The utilized microwave radiation method with the assistance of polyethylene glycol has the advantages of being obvious in structure-directing action on product, without the phenomenon of temperature lag, adjustable in the heating power of reaction system, simple in preparation process etc; and the zirconium molybdate material prepared by utilizing the process is expected to act promotion action on the booming of the application field thereof.

The invention relates to a wastewater evaporation, concentration and reduction integrated device. The device is composed of a box body, an evaporation unit, a circulating fan, a heating unit, a condensation unit, a condensate water purification unit, a control unit, an auxiliary pipeline and a partition plate. An evaporation plate in the device is used for direct contact evaporation of hot dry airand wastewater, a condenser cools and dehumidifies hot wet air, an electric heater heats circulating air, a circulating fan enables the air to circularly flow in the system, and a multilayer filtering system continuously purifies water condensed to a bottom water collecting tank to form standard-reaching return water. The air cooler is used for generating circulating cooling water, and wastewaterof the evaporation unit is placed in a push-pull type waste liquid tank, so that the wastewater can be conveniently supplemented, and the concentrated wastewater can be conveniently replaced. The boxbody is wrapped with a heat preservation layer and adopts a self-control unit in order to improve the efficiency and reliability of the system, so the device can be conveniently run and managed; andthe device has the advantages of short technological process, simple device structure, convenience in maintenance, and realization of clean and environmentally-friendly treatment of high-concentrationwastewater.

The invention relates to a large multifunctional environmental simulator for electrical tests, which comprises an environmental stimulation chamber and is characterized in that an air heat-exchange circulation system and an ice-melting system are arranged in the environmental stimulation chamber; and the environmental stimulation chamber further comprises an ice-coating, rain-exposing and ultrasonic-atomizing system, a water treatment system, a heat-fogging system, a cooling water circulation system, a refrigeration system, a vacuuming and defogging system, a measurement and control system and an ultra-high voltage power supply system for providing a high-voltage charging state for test-pieces. By achieving the skillful coordination among the systems and the uniform operation control by the measurement and control system, the large multifunctional environmental simulator integrates various testing functions of environmental simulations, such as high-altitude, ice-coating, contamination, rain-exposing and other simulations into a whole. Therefore, the invention is widely suitable for the testing process for large multi-parameter environmental simulations.

The invention provides a water temperature control method of a colon hydrotherapy instrument and the colon hydrotherapy instrument. The water temperature control method comprises the following steps:calculating a first difference value between a target temperature and an initial temperature; heating to enable the water temperature to rise to the self-adaptive temperature, and recording the firstheating time; obtaining the water storage capacity in the colon hydrotherapy instrument; according to the water storage capacity, controlling the duty ratio of the conduction time of a switch of a heater of the colon hydrotherapy instrument, and conducting heating to enable the water temperature to rise to the target temperature within the preset time. The change of the heating power of a heater is controlled by controlling the duty ratio of the conduction time of a switch, so that different water volumes are realized, and the same temperature is increased within the same time.