47results about How to "Good constant temperature" patented technology

The invention discloses a building flat plate shaped split typed wall-mounted vacuum solar energy superconductive heat collector, comprising a separating heat pipe formed by a flat plate collector with an automatic liquid separator, a circulating steam pipe, a circulating liquid pipe, a condenser and a heat accumulator. A plurality group of precise metering holes and capillaries are horizontally distributed between a liquid storage accumulator and a finned tube which are communicated with the circulating liquid pipe. The work condition of balanced film high temperature evaporation can be realized. The heat collector is characterized in that the heat collector has high temperature heat collection output, high efficiency and high energy heat transmission, long distance circulation without pump, low temperature and freeze proof, can be harmonized with buildings, is economical, has long service life and so on. The heat collector exploits the novel applied field of the solar energy with high temperature and separation structure, which can form devices of solar energy boiled water generator, radiant heater, air conditioner, additional water heater, etc. The heat collector is presented in a square and flat shape, which can be mounted and hung on the roof, the wall, the position above the window, the position below the window and the balcony of the buildings, is beautiful and harmonious. The heat collector is suitable for being used in high rise buildings with multiple floors, which is an ideal technology of solar energy for building integration.

The invention discloses an air outlet temperature control method and device for an air conditioner and the air conditioner. The air outlet temperature control method comprises the steps that an air outlet temperature standard database is set and includes the corresponding relation of the model of the air conditioner and the standard air outlet temperature as well as the corresponding relation of the operation mode of the air conditioner and the standard air outlet temperature; after the air conditioner is started and operates for first preset duration, the current temperature of an air outlet of the air conditioner is acquired; the current temperature of the air outlet of the air conditioner is compared with the current air outlet temperature according to the standard air outlet temperature corresponding to the model and the operation mode of the air conditioner in the database; and when the current air outlet temperature deviates from the standard air outlet temperature, the rotating speed of a draught fan of the air conditioner is subjected to adaptive adjustment so that the current air outlet temperature cannot deviate from the standard air outlet temperature. According to the scheme of air outlet temperature control method and device for the air conditioner and the air conditioner, the defects that the application range is small, the temperature adjusting difficulty is large and the user experience is poor in the prior art can be overcome, and the beneficial effects that the application range is large, the temperature adjusting difficulty is small and the user experience is good can be achieved.

The invention discloses a constant temperature control system for a gas water heater, the system comprises a controller, a proportional valve assembly, a water flow detection assembly, a water inlet temperature detection assembly which are internally arranged in the gas water heater as well as a low delay temperature sensor arranged on a water outlet pipe in a water heater; the controller, the proportional valve assembly, the water flow detection assembly, the water inlet temperature detection assembly and the low delay temperature sensor are respectively connected with the controller; the lowdelay temperature sensor is used for collecting the water outlet temperature of the current gas water heater, and the temperature information is sent to the controller; the controller adjusts the proportional valve assembly according to the collected water flow of the current gas water heater, the current water inlet temperature, and the current water outlet temperature. The structure can changethe original control system of the gas water heater from a high hysteresis control system to a low hysteresis control system, so the control algorithm requirement of the system is reduced effectively;and meanwhile, the purposes of adaptability range and constant temperature performance improvement are achieved.

The heating device mainly contains a dual-core heat cable and a control circuit. The dual-core heating cable mainly contains a core, a heating wire winding spirally around the core, a NTC (negative-temperature-coefficient) layer wrapping around the core and the heating wire, a PTC heating wire winding spirally around the NTC layer, and an insulating layer wrapping around the NTC layer and the PTC heating wire. The control circuit monitors the PTC heating wire's current for constant temperature control, and the leakage current through The NTC layer as a second over-temperature protection. As such, the heating device has a superior constant temperature effect and avoids the problem of burning down the heating cable. The heating device therefore has a longer operational life span.

The invention comprises a main support insert disk, side-opening jacks of a special joint thermal resistor to be detected, a guide holding tube of a standard thermometer, a guide holding tube of a thermometer to be detected, a positioning insert plate of the special joint thermal resistor to be detected, a rotary lifting righting clamp, a connection plate and annular collets. Three side-opening jacks of the special joint thermal resistor to be detected are uniformly distributed on the main support insert disk, the annular collets and a coiled clip reed are provided below the jacks, and an insert plate guide base is arranged on both sides of the side-opening jacks. The guide holding tube of the thermometer to be detected is provided below the main support insert disk, and the rotary lifting righting clamp is arranged on the guide holding tube of the standard thermometer. The thermometer of a thermal resistor to be detected can be detected by arranging in the guide holding tube, disposing in a constant-temperature bath and adjusting the height of the lifting righting clamp to fix the thermometer. The invention has the advantages of safe and reliable operation, high work efficiency, good thermostatic performance and accuracy detection.

The invention relates to the technical field of bedding and particularly relates to a multifunctional pillow which comprises a pillow case and a pillow interior, wherein the pillow interior is arranged in the pillow case; the pillow interior comprises a water bag, an upper-layer pillow interior and a lower-layer pillow interior which are sequentially arranged from top to bottom; the upper-layer pillow interior is filled with silks; the lower-layer pillow interior is filled with a Chinese herbal medicine mixture; the water bag is arranged at the middle, which is away from the surface of the lower-layer pillow interior, of the upper-layer pillow interior; the middle parts of the left and right ends of the pillow case are sewn with fabric strips; the front ends of the fabric strips are provided with magic tapes so as to ensure that the left and right ends of the pillow case can be bound together. The multifunctional pillow has the beneficial effects that softness and health-care property are achieved, and the effects of repelling mosquitoes, soothing the nerves, helping sleep and treating headache are achieved; the water bag can be filled with cold water and hot water; the multifunctional pillow is warm in winter and cool in summer; the multifunctional pillow is heated by hot water, so that blood circulation of the head and neck of a human body are accelerated, fatigue is relieved, and the sleep quality of people can be effectively improved.

The invention provides a gas water heater constant temperature intelligent control device. The gas water heater constant temperature intelligent control device comprises a data collecting unit, an analog-digital converter and a controller unit; the data collecting unit comprises a water temperature sensor and a water level sensor which are used for collecting the water temperature and the water level in a water heater to obtain the water temperature and water level signals of the analog quantity; the analog-digital converter is used for converting the water temperature and water level signalsof the analog quantity into water temperature and water level signals of the digital quantity; and the controller unit is used for obtaining the water temperature and water level signals of the digital quantity and automatically controlling and regulating starting and stopping of a heater of the water heater according to the water temperature and water level signals. The device has the good constant temperature performance, and the requirement that the water temperature fluctuates within the scope of + / -2 DEG C of a set value in the using process is met; the low water flow resistance and largewater amount are achieved, and the relatively stable water amount in the using process is maintained; the quick heating function is achieved, and the cold water amount generated when use is started or restarting is carried out after shutdown is omitted; and the quick water temperature constant function is achieved, and the alternate cooling and heating phenomenon during showering is avoided.

The invention belongs to the technical field of semiconductor lighting devices, and specifically relates to a vacuum ultraviolet LED junction temperature and ultraviolet radiation measuring system based on an integrating sphere. The measuring system comprises an external bearing sphere which can be pumped to a low-vacuum state, an internal integrating sphere which can be pumped to a high-vacuum state, a constant temperature device, a measuring circuit, and a driving circuit. The bearing sphere and the integrating sphere are electrically connected by an aviation plug. The side wall of the internal integrating sphere is equipped with a standard lamp, a vacuum ultraviolet power meter probe and a vacuum ultraviolet spectrometer, and can measure the radiation flux and the spectrum of a vacuum ultraviolet LED. The constant temperature device is connected with a temperature feedback system and a computer control system, and can control the temperature accurately and quickly. The advantage lies in that the parameters of a vacuum ultraviolet LED, such as spectral power distribution, radiation flux, electric power, thermal power and junction temperature, can be measured simultaneously under constant junction temperature, and test is highly repeatable.

The invention discloses a solar linkage fuel gas rapid water heater with a water mixing valve. The solar linkage fuel gas rapid water heater comprises a heat exchanger, a combustor for providing heat for the water heater, a water feeding pipe, a water discharging pipe and a main controller, wherein the water feeding pipe and the water discharging pipe are connected to the heat exchanger; the water feeding pipe on the fuel gas rapid water heater is provided with the water mixing valve connected with the main controller, and two water inlets of the water mixing valve comprise a cold water inlet and a discharged water connection opening of the solar water heater correspondingly. The solar linkage fuel gas rapid water heater is characterized in that the cold water inlet and the discharged water connection opening of the solar water heater are provided with a first temperature sensor and a second temperature sensor correspondingly, wherein the first temperature sensor and the second temperature sensor are connected with the main controller, and the main controller changes the water inflow of the cold water inlet and the discharged water connection opening of the solar water heater according to signals fed back by the first temperature sensor and the second temperature sensor. When the solar linkage fuel gas rapid water heater works, the temperature of the discharged water of fuel gas rapid water heater can always be maintained at the user set temperature stably, the constant temperature effect is outstanding, and hot water of the solar energy water heater is utilized to the maximum degree while user requirements are met.

The invention discloses a 3D printer. The 3D printer comprises a printing head, a printing platform, a cover plate and a heat shield, the printing platform and the cover plate are oppositely arranged,and the heat shield is made of an elastic material; and the printing platform, the cover plate and the heat shield enclose to form closed printing space, the printing platform is movably disposed relative to the cover plate, and a discharging nozzle of the printing head is disposed in the printing space. The printing head is not moved when the 3D printer is working, and the printing platform is moved, so that an existing printing mode is changed; since the distance between the printing head and a raw material tray is fixed, no raw material is pulled; during the operation of the printer, the temperature generated by the printing head is limited to the space enclosed by the cover plate, the printing platform and the heat shield, and other parts of the printer do not need special high temperature resistant materials; and at the same time, better energy-saving property and better constant temperature performance are achieved because of a small high-temperature area, thereby reducing the cost and achieving high-temperature printing.

The invention discloses a multi-physical coupling field cavitation erosion device. The multi-physical coupling field cavitation erosion device comprises a light field power supply, a magnetic field power supply, a cooling system, an annular electromagnet, an amplitude-changing rod, an energy converter, an ultrasonic power supply, a shielding cover, an electrode plate positive, an electrode plate negative, an electric field generator, a water storage box, distilled water, a test sample, a container, a point light source and light-transmitting glass, wherein the test sample is arranged at the bottom of the amplitude-changing rod; the test sample is immersed into the distilled water; the annular electromagnet, the electrode plate positive, the electrode plate negative, the point light source and the energy converter are arranged at the periphery of the distilled water; and the external magnetic field power supply, the electric field generator, the light field power supply and the ultrasonic power supply are conducted sequentially, so that a multi-physical coupled field of magnet, electricity, light and sound is formed in the distilled water, and complex cavitation erosion is generated on the surface of the test sample. Multiple physical fields of the device can be controlled synergistically or independently, the test sample materials can be subjected to cavitation erosion experiments with different degrees by adjusting the intensity of the magnetic field, the intensity of the electric field, the intensity of the light field and the ultrasonic frequency, and the multi-physical coupling field cavitation erosion device is suitable for cavitation erosion resistance evaluation experiments of small test sample materials.

The invention provides an aluminum profile double-fan vacuum wooden transfer furnace which is simple and compact in structure, fast in temperature rise in a furnace body, good in constant temperature effect and stable and reliable in transfer quality. The aluminum profile double-fan vacuum wooden transfer furnace comprises the wooden transfer furnace body, a pair of furnace doors, a pair of driving devices, a combustion container, a combustor, a pair of circulation blowing components, a pair of vacuum transfer systems, a left feeding trolley, a right feeding trolley and an operation control panel. The furnace doors are located at the two ends of the wooden transfer furnace body. The driving devices are used for driving the furnace doors to be closed and opened respectively. The combustion container is arranged at the top end of the wooden transfer furnace body. The combustor is arranged at the top end of the wooden transfer furnace body and used for providing heat for the combustion container. The circulation blowing components are connected to the two sides of the combustion container respectively and used for providing hot air for aluminum profiles in an inner cavity of the wooden transfer furnace body. The vacuum transfer systems are located on the two sides of the wooden transfer furnace body. The left feeding trolley and the right feeding trolley are used for being connected with the vacuum transfer systems respectively and the wooden transfer furnace body. According to the technical scheme, the aluminum profiles in the wooden transfer furnace are heated more evenly, and the constant temperature effect is more excellent, so that the transfer grain of the aluminum profiles is clearer, and the stereoscopic impression is stronger.

The invention discloses a heating device capable of keeping constant temperature of a tobacco leaf greenhouse seedling cultivation water pool. The heating device is composed of a heating unit and a circulating water supply system, wherein the heating unit is a box and provided with a shell and an inner core. A temperature controller, indicator lights, a power switch and an adjusting knob are arranged on the outer surface of the shell, a power connector is arranged on the upper portion of the shell, and a water inlet connector and a water outlet connector are formed in the lower portion of the shell. The inner core is provided with a heating module, a pressure relay and a buzzer, the heating module is composed of a far-infrared heating pipe, a lower cover, an upper cover, a sealing rubber pad and a pressing screw, and the far-infrared heating pipe is placed in the middle of a groove. The pressure relay is mounted above the water inlet connector, and the circulating water supply system is further composed of a water inlet pipe, a water outlet pipe and an immersible pump, wherein one end of the water outlet pipe is connected with an outlet of the heating unit, the other end of the water outlet pipe is inserted in water in the seedling cultivation water pool, one end of the water inlet pipe is connected with the immersible pump mounted under water, and the other end of the water inlet pipe is connected with a water inlet of the heating unit. The heating device can be used for continuous heating, water outlet temperature is constant and even, and the heating device is suitable for tobacco leaf seedling cultivation.

The invention relates to a preparation method of a chip type inductor. The preparation method of the chip type inductor comprises the following steps: immersing one layer of copper slurry on two electrode end faces of a magnetic core of the chip type inductor; drying and sintering to form copper layers; sequentially electroplating the surfaces of the copper layers to form a nickel layer and a tin layer to form two end electrodes; winding a copper wire on a middle column part of the magnetic core of the chip type inductor to form an inductance coil and welding the two ends of the copper wire on the two end electrodes respectively in a manner of using a ceramic welding head to hotly press; forming a plastic sealing layer on one end, far away from the end electrodes, of the magnetic core; printing a mark on the surface of the plastic sealing layer in a manner of carrying out silk-screen printing by UV (Ultraviolet) printing ink; drying the chip type inductor printed with the mark. The preparation method of the chip type inductor has a lower cost and the prepared chip type inductor is convenient to recognize.

The invention provides a rapid heating and cooling system, and relates to the technical field of laboratory temperature control. The rapid heating and cooling system based on a heating and cooling system device comprises a temperature sensing module, the temperature sensing module is in signal connection with a digital frequency conversion module, and the digital frequency conversion module is insignal connection with a refrigerating module and a heating module; a modular process of the rapid heating and cooling system is as follows: 1) inputting the temperature required by a laboratory through the temperature sensing module; 2) calculating the temperature difference between the target temperature and the actual temperature in the laboratory through the temperature sensing module, and then transmitting the calculation result to the digital frequency conversion module; and 3) sensing the temperature difference calculated by the temperature sensing module through the digital frequency conversion module so as to change the power supply frequency of refrigerating and heating units of the refrigerating module and the heating module, thereby controlling the refrigerating and heating speeds. According to the invention, the laboratory temperature adjustment is fast, the constant temperature state is good, and the temperature adjustment is intelligent and soft.

The invention comprises a temperature control cavity mounted in the rapid determination meter. It features the following: said temperature control cavity uses the heated air to control the temperature in the control cavity. The invention also provides a BOD rapid determination meter comprising a case, and both microbial electrode and the temperature controller mounted in the case.

The invention discloses an in-vitro intestine cleaning instrument with constant-temperature electrolyzed water which fills constant-temperature clean water from an anus of a human body to clean intestines. The in-vitro intestine cleaning instrument comprises a sealing chamber formed by a front shell and a rear shell; direct current electric heating plates and mica insulation layers coating the direct current electric heating plates are respectively arranged on inner surfaces of the front shell and the rear shell; electrolytic baths ,of two-groove chambers, comprising positive and negative electrode plates and anion-cation exchange membranes respectively and closely attached to the positive and negative electrode plates in a corresponding manner are arranged in the sealing chamber; the electrolytic baths of the two-groove chambers separate the sealing chamber into an acidic water chamber on one side of a cathode plate and an alkaline water chamber on one side of an anode plate; a water inlet is formed in the lower part of the sealing chamber to be communicated with the two-groove chambers; water outlets are respectively formed in the upper parts of the two-groove chambers. The in-vitro intestine cleaning instrument provided by the invention electrolyzes source water into water with different performances while source water is heated by constant temperature, and can provide electrolyzed water corresponding to different pH (potential of hydrogen) performances according to intestinal conditions of users. Meanwhile, the water is heated by using a direct current to realize the technical effects of safety and practicality, good constant temperature effect and energy saving.

The invention provides an aluminum profile double-draught-fan vacuum wood grain transfer printing furnace which is simple and compact in structure, rapid in heating in a furnace body, good in a constant-temperature effect and stable and reliable in transfer printing quality. The aluminum profile double-draught-fan vacuum wood grain transfer printing furnace comprises a wood grain transfer printingfurnace body, a pair of furnace doors located in the two ends of the wood grain transfer printing furnace body, a pair of drive devices for driving the pair of furnace doors to be closed and opened,a combustion inner container arranged at the top end of the wood grain transfer printing furnace body, a combustor used for providing heat for the combustion inner container, a pair of circulating blowing assemblies connected to the two sides of the combustion inner container and used for providing hot air for an aluminum profile in the wood grain transfer printing furnace body, a pair of vacuum transfer printing systems located on the two sides of the wood grain transfer printing furnace body, a left feeding trolley, a right feeding trolley and an operation control panel, wherein the left feeding trolley and the right feeding trolley are used for connecting the pair of vacuum transfer printing systems and the wood grain transfer printing furnace body. According to the scheme, the aluminumprofile in the wood grain transfer printing furnace is more evenly heated, the constant-temperature effect is also more excellent, then transfer printing grain of the aluminum profile is clearer, andthe stereoscopic sense is higher.

A new niobium-tungsten crucible is provided, which has a crucible body, the crucible body is a barrel-shaped structure made of niobium-tungsten alloy, the upper opening of the crucible body is fitted with a crucible cover, and the lower end of the crucible cover is formed with a downward convex The plate I and the convex plate I wrap the upper end opening of the crucible body, and the inner peripheral wall surface of the convex plate I of the crucible cover and the outer peripheral wall surface of the opening end of the crucible body are adapted and bonded to each other. The invention forms a niobium-tungsten alloy crucible by adding tungsten with a radius similar to that of niobium atoms, thereby improving the mechanical properties and chemical stability of the pure niobium crucible, ensuring the purity of the melt in the crucible, and prolonging the service life of the crucible.

The invention discloses a drum-type thermal-insulation fermentation device used for production of a bio-organic fertilizer. The device comprises a drum-type stirring component and a temperature control component; the drum-type stirring component comprises a roll cylinder, the bio-organic fertilizer is placed in the roll cylinder, and the drum-type stirring component is used for periodically turning the bio-organic fertilizer in the roll cylinder; and the temperature control component is arranged outside the roll cylinder and used for real-time temperature control treatment of the bio-organic fertilizer in the roll cylinder at each stage. According to the device provided by the invention, a temperature control cylinder sleeves the exterior of the roll cylinder, a water temperature is controlled to control a temperature of the organic fertilizer in the roll cylinder, so that the quality of the material fermentation product is ensured; stirring rods are arranged in the roll cylinder, thestirring rods can fully stir materials in the fermentation process of the materials, so that contact of the materials with air is accelerated, and a sufficient fermentation reaction is ensured; and aflow guiding plate in the device is arranged on the inner wall of the roll cylinder in an annular spiral manner, so that guiding of the materials is facilitated.

The invention provides the preparation and application of a rapid film-forming energy-saving and environmental protection machine spray fine decoration mortar. The preparation method is: mixing the solid phase change material and the liquid phase change material, heating and melting, adding antioxidants and adsorption materials, and after the adsorption is saturated, Mix evenly with thermal conductivity additives and film-forming agents, solidify and form, cool to room temperature, and obtain solid-liquid phase change materials; white cement, diatomaceous earth, emulsifier, epoxidized polybutadiene, gypsum and solid-liquid phase change materials The materials are added into water, mixed evenly, cured and molded, removed from the mold, and cured for 28 days to obtain fast film-forming energy-saving and environmental protection machine spray fine decoration mortar. The refined decoration mortar prepared by the invention has high content of phase-changing materials, excellent energy storage effect, good thermal conductivity, good dispersion with mortar, good constant temperature effect, and rapid film-forming performance of epoxy-modified polybutadiene polymer Excellent, also has waterproof and anti-corrosion, therefore, the refined decoration mortar prepared by the present invention is green and constant temperature, energy-saving and durable, safe and environment-friendly.

The invention discloses a low temperature environment testing apparatus. The apparatus comprises a low temperature working bin, a controller, a cold air intake window, an airflow returning window, a cold air circulation channel and temperature-detecting devices; the cold air circulation channel comprises a cold airflow intake channel and an airflow returning channel, a low temperature exchanger is arranged at a position where the cold airflow intake channel and the airflow returning channel joint, a fan set is installed on the cold airflow intake channel or on the airflow returning channel, and the fan set continuously sends cold airflow obtained after the low temperature exchanger carries out low temperature exchange to the low temperature working bin through the cold airflow intake channel and synchronously continuously pumps air in the low temperature working bin to the position where the low temperature exchanger is installed through the airflow returning channel for low temperature exchange, thereby realizing continuous circular flowing of air in the cold air circulation channel. The low temperature environment testing apparatus provided in the invention has the advantages of a simple structure, compact installation, convenient arrangement, simple usage and operation, a good application effect, a fast cooling speed, a good constant temperature effect and low energy consumption and can effectively overcome a plurality of practical problems of conventional low temperature environment testing apparatuses.

The invention discloses a light siheng air-conditioning suit capable of resisting pointed items. The light siheng air-conditioning suit comprises an air-conditioning suit body. A solar cell panel and a pocket are arranged on the surface of the air-conditioning suit body. An air-conditioning suit hat is connected to the top end of the air-conditioning suit body through a zipper. Two fan clamping sleeves are arranged on the two sides of the back side of the air-conditioning suit body, and micro fans are arranged inside the fan clamping sleeves. A storage battery is arranged inside the pocket. A data line interface is formed in the top end of the storage battery, and is connected with the micro fans and the solar cell panel through a data line. The surface of the air-conditioning suit body is a rainproof surface layer, and a tempered ceramic armor plate is arranged at the bottom end of the rainproof surface layer. A fiber layer is arranged at the bottom end of the tempered ceramic armor plate, and a cotton liner is arranged at the bottom end of the fiber layer. The light siheng air-conditioning suit is light, high in strength, capable of saving energy and protecting the environment, dry and comfortable, and capable of effectively preventing heat stroke and improving working efficiency. Besides, a dual power supply mode where the solar cell panel or the data line is connected with a power source can be realized, and energy saving and environment protecting are realized.

The invention relates to a sealing rubber sheet and a commercial vehicle. The sealing rubber sheet comprises an aluminum foil sheet and a damping sheet arranged on one side of the aluminum foil, and the side, away from the aluminum foil, of the damping sheet is used for covering the inner wall of the cab. Firstly, the sealing rubber sheet can isolate damp and hot air in a cab from an ice-cold inner wall of the cab, direct contact between the damp and hot air and the ice-cold inner wall of the cab is avoided, and the damping rubber sheet has good constant temperature, so that frosting and water condensation phenomena on the inner wall of the cab can be effectively prevented. And secondly, the aluminum foil sheet can play a role in reflecting heat radiation, and the damping sheet has a very strong role in blocking heat transfer, so that the aluminum foil sheet is matched with the damping sheet to play a very good role in insulating heat of the cab. And then, the damping sheet has good cold insulation performance, so that cold air outside the cab can be effectively prevented from entering the cab.

The invention discloses a novel outdoor sportswear. The novel outdoor sportswear comprises a body, a collar and sleeves; the body and the sleeves are made from a composite fabric which is composed ofa surface layer fabric and a lining fabric; the surface layer fabric is made from polytetrafluoroethylene resin, the lining fabric is made from polyamide, the surface layer fabric bonds with the lining fabric with an organic adhesive, and the bonding mode adopts a spot bonding mode. According to the novel outdoor sportswear, the sportswear is unique in structural design, and the adopted compositefabric is provided with a built-in cavity structure; by means of the structure, the fabric has good constant-temperature performance, and meanwhile air permeability of the fabric is achieved; the wearing comfort of people is effectively improved, and the practicability is excellent.

The invention provides a temperature control device for a BOD (Biochemical Oxygen Demand) tachymeter adopting a microorganism electrode method, which comprises a temperature control cavity arranged in a box body of the tachymeter and is characterized in that the temperature control cavity heats gas to mix the gas in the cavity in a convection way so as to control the temperature in the cavity. The temperature control device is characterized in that the temperature control effect is stable, the detection precision is high, and the using period is long.