CN207167666U

CN207167666U - A kind of microwave combined heating disinfection system of continuous type fluid food ohm

Info

Publication number: CN207167666U
Application number: CN201720055867.6U
Authority: CN
Inventors: 李星恕; 张雷锋; 熊秀芳; 陈文�; 汪春鑫; 赵予同
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2017-01-11
Filing date: 2017-01-11
Publication date: 2018-04-03
Anticipated expiration: 2027-01-11

Abstract

It the utility model is related to a kind of microwave combined heating disinfection system of continuous type fluid food ohm, belong to food heating sterilizing unit technical field, the system includes material pot three, Manual-control one-way valve one, screw pump one, singlechip controller one, annular electrode four, polytetrafluoroethylene (PTFE) heating pipe is a set of, controllable electric power is a set of, three sets of microwave heating equipment, magnetic valve two, pipe heat exchanger two, insulating tube one, one, computer containing host computer procedure, temperature sensor four, microwave control unit one, stainless steel tube needed for one, flowmeter and connection each several part.The utility model can solve the heating problem of non-uniform of food containing granule fluid, available for industrial production, it can also be used to scientific research, improving product quality, improving the fields such as food sterilization effect, have important significance of scientific research.

Description

A kind of microwave combined heating disinfection system of continuous type fluid food ohm

Technical field

The utility model belongs to the heating sterilizing unit technical field of food, is related to a kind of food material that is used for and (commonly flows Body, containing granule fluid and high viscosity fluid) processing microwave ohm combined heat sterilizing unit, more particularly to one kind can be real Existing fluid is synchronous with solid particle to heat up, heating-up temperature is controllable and the evaluable continuous type fluid food ohm microwave of bactericidal effect Combined heat disinfection system.

Background technology

In food-processing industry, the tradition such as the convection current of fluid food heating sterilization generally use, conduction containing solid particle Heating means, due to the firing rate difference of solid with liquid, to easily cause granular food appearance overheat well-done and influence particle Integrality, nutritional ingredient are also greatly destroyed, and have a strong impact on the commercial value and nutritive value of product.

Ohmic heating can be straight by electric energy using the resistance characteristic of material in itself in the state of food material continuously flows Switch through and turn to heat energy, realize the uniform quick heating without thermograde inside electric field, at the same time, Ohmic heating can change micro- life Thing membrane passage, sterilization temperature is reduced, realize low temperature sterilization, save the energy.But due to electrode arrangement, mixed material Distribution of resistance it is uneven the problem of, cause the fluid food containing particle to be difficult to solid-liquid while heat up.

Microwave heating is heated using 2450MHz microwave penetration material effect with intramolecule, avoids traditional heating side The problem of center heating is slow caused by formula, it is possible to achieve quick heating, simultaneously as its efficiency of heating surface and the dielectric loss of material Factor is related, and position that can be different to dielectric dissipation factor in mixed material carries out selective heating, causes to heat uneven； The problem of energy loss be present during microwave transmission simultaneously, exacerbate the inhomogeneities of material Temperature Distribution inside mixed material.

The content of the invention

The purpose of this utility model is to overcome the shortcomings of prior art, proposes a kind of continuous type fluid food ohm microwave Combined heat disinfection system, the advantage of comprehensive two kinds of heating method for disinfection, defect are complementary.The utility model can be added by microwave Heat is combined with two kinds of heating techniques of Ohmic heating, realizes whole heating zone fluids within pipes food and its particles contained uniform Continuous quickly heating and sterilization.

The utility model proposes a kind of microwave combined heating disinfection system of continuous type fluid food ohm, the system inclusion Batch can (1a, 1b, 1c) three, including first material tank (1a), second material tank (1b), 3 material tank (1c), check valve (13) one, screw pump (14) one, singlechip controller (6) one, annular electrode (5a, 5b) two, including it is first annular Electrode (5a), the second annular electrode (5b), polytetrafluoroethylene (PTFE) heating pipe (15a, 15b, 15c) three saves, including the first polytetrafluoro Ethene heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b), the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c), can Control power supply (3) is a set of, and three sets of microwave heating equipment (4a, 4b, 4c), including the first microwave heating equipment (4a), the second microwave add Thermal (4b), the 3rd microwave heating equipment (4c), magnetic valve (8a, 8b) two, including the first magnetic valve (8a), the second electromagnetism Valve (8b), pipe heat exchanger (12a, 12b) two, including the first pipe heat exchanger (12a), the second pipe heat exchanger (12b), protect Temperature pipe (11) one, (7) one, the computer containing host computer procedure, DS18B20 temperature sensors (10a, 10b, 10c, 10d) four It is individual, including the first DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 temperature Sensor (10c), the 4th DS18B20 temperature sensors (10d), microwave control unit (2) one, (9) one, flowmeter and The stainless steel pipes needed for each several part are connected, wherein the outlet of the entrance and first material tank (1a) of described check valve (13) leads to Cross flange to be connected with stainless steel pipes, the porch of screw pump (14) is connect by Quick hoop and Manual-control one-way valve (13) outlet Stainless steel pipes be connected, the cold fluid inlet of the first pipe heat exchanger (12a) is gone out by flange and Manual-control one-way valve (13) The stainless steel pipes that mouth is connect are connected, and its hot fluid inlet exports connected stainless steel pipes by flange and insulating tube (11) It is connected, the hot fluid inlet of the second pipe heat exchanger (12b) is gone out by the hot fluid of flange and the first pipe heat exchanger (12a) The stainless steel pipes that are connect of mouth are connected, the first polytetrafluoroethylene (PTFE) heating pipe (15a) by flange with from the first pipe type heat transfer The stainless steel tube that device (12a) cold fluid outlet is connect is connected, and first annular electrode (5a) and the second annular electrode (5b) are respectively Add embedded in the first polytetrafluoroethylene (PTFE) heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoroethylene (PTFE) Between hot channel (15c), added between each length of tubing by joint seal of flanges, the first microwave heating equipment (4a), the second microwave Thermal (4b) and the 3rd microwave heating equipment (4c) are stuck in the first polytetrafluoroethylene (PTFE) heating pipe by split type structure (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c) middle part, insulating tube (11) stainless steel pipes that entrance is connect are connected with the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c) by flange, the first electromagnetism The hot fluid outlet ports that valve (8a) and second solenoid valve (8b) are connected on the second pipe heat exchanger (12b) by flange order are connect not Become rusty on steel conduit.It is characterized in that described first material tank (1a) is provided for accepting raw material, second material tank (1b) is set For accepting qualified products, 3 material tank (1c) is provided for accepting substandard product；Described check valve (13), which is set, to be used System is flowed into control raw material, and prevents feed back；Described screw pump (14) is provided for noting to enter the raw material of system Enter the power of operation so that material can in systems smooth flow and control material flowing speed；The first described pipe Formula heat exchanger (12a) is used for the precooling processing to heated product, while is carried out using waste heat to the new material into system Preheating, the second pipe heat exchanger (12b) are used for the final cooling treatment to heated product so that material disclosure satisfy that finished product will Ask；Described the first polytetrafluoroethylene (PTFE) heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoro Ethene heating pipe (15c) is provided for isolating the electrode of energization with stainless steel pipes, while can make microwave with few Loss is transmitted into inside material, completes heat effect；Described first annular electrode (5a), the second annular electrode (5b) are set For being internally formed electric field in heating zone pipeline, the fluid of flowing through pipe is heated, and its power-on voltage is with frequency by controllable The control of power supply (3), its concrete structure are as shown in Figure 2；Described the first microwave heating equipment (4a), the second microwave heating equipment (4b), the 3rd microwave heating equipment (4c) are provided for sending the heating of the first polytetrafluoroethylene (PTFE) of power frequency (2450MHz) microwave transparent Pipeline (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c) heating raw material, and The microwave power of signal adjustment output and the break-make of microwave heating from microwave control unit (2) can be received, met different The requirement of material；Described insulating tube (11) is provided for being incubated the material that heating is completed, to reach more preferable sterilization Effect；Described the first magnetic valve (8a), second solenoid valve (8b) are provided for receiving the signal from monolithic controller, control The flow direction of finished product, it is qualified that material is determined as by the computer (7) containing host computer procedure, then second solenoid valve (8b) is opened, otherwise the One magnetic valve (8a) is opened；Described singlechip controller (6) is provided for and the first DS18B20 temperature sensors (10a), Two DS18B20 temperature sensors (10b), the 3rd DS18B20 temperature sensors (10c), the 4th DS18B20 temperature sensors (10d), flowmeter (9), controllable electric power (3), microwave control unit (2) and the computer (7) containing host computer procedure are led to Letter, realizes data (the first DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 The temperature that temperature sensor (10c), the 4th DS18B20 temperature sensors (10d) measure, electric current, voltage and microwave heating Power) collection and analysis and heating parameters (electric current, the power that voltage and microwave heat) and system acting (magnetic valve is opened Close) control；Described controllable electric power (3) is provided for controlling the power supply of heating zone, and can receive to control from single-chip microcomputer The Signal Regulation output voltage of device (6) and the frequency of output voltage, while the current parameters on wire are fed back into single-chip microcomputer control Device (6) processed, the computer (7) containing host computer procedure is sent to by singlechip controller (6), so as to facilitate data analysis；Described Computer (7) containing host computer procedure is provided for receiving data (voltage of Ohmic heating, electricity from singlechip controller (6) Stream, frequency, the power of microwave heating, the temperature and data on flows of each temperature acquisition point) carry out data analysis and judge to add Whether thermal sterilization is qualified, and data processed result is fed back into singlechip controller (6)；The first described DS18B20 TEMPs Device (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 temperature sensors (10c), the 4th DS18B20 temperature Sensor (10d) is provided for gathering each temperature acquisition click-through trip temperature and sends the data to singlechip controller (6)；Described microwave control unit (2) is provided for controlling microwave input power, meets the need that different material heats to microwave Ask, preferably mutually to be cooperated with Ohmic heating；Described flowmeter (9) is provided for detecting system flow, by adjusting flow The disposal ability of adjustment system, while singlechip controller (6) is returned data to, and then feed back to the electricity containing host computer procedure Brain (7), carry out data analysis.

The advantages of of the present utility model is：

The complementation of inhomogeneities is heated by Ohmic heating inhomogeneities and microwave, realizes same section in pipeline, Solid-liquid synchronously heats up, so as to improve bactericidal effect；Compared with conventionally pasturised device, the system corollary equipment is few, energy profit With more efficient；Its microwave heats uses independent control with Ohmic heating, therefore system itself is easily controllable and working method is various, Both can be used alone mode of heating can also heat respective parameter realization by reasonable adjusting Ohmic heating and microwave To the combined heat of different material；In addition, the system has the advantage for being easy to extension compared to existing system, life can be both used as Production equipment is used, and the different parameters that can also be studied as experiment porch under two kinds of mode of heatings and combined heat are set to difference The heat sterilisation of material.

Brief description of the drawings

Fig. 1 is a kind of microwave combined heating disinfection system schematic diagram of continuous type fluid food ohm.

Fig. 2 is an ohm microwave heating zone pipeline composition structure sectional view.

Fig. 3 is an ohm microwave heating zone pipeline composition axis of no-feathering mapping.

Fig. 1 references：

1a- head tank 1b- qualified products tank 1c- substandard product tank 2- microwave control unit 3- controllable electric powers 4- Computer 8a- substandard product magnetic valves of the microwave heating equipment 5- electrodes 6- singlechip controllers 7- containing host computer procedure 8b- qualified products magnetic valve 9- flowmeter 10a- temperature sensor 10b- temperature sensor 10c- temperature sensors 10d- Temperature sensor 11- insulating tube 12a- pipe heat exchanger 12b- pipe heat exchanger 13- Manual-control one-way valve 14- screw pumps The stainless steel pipes of connection are replaced with heavy line among 15- polytetrafluoroethylene (PTFE) heating pipes are all.

Fig. 2 references：

1- polytetrafluoroethylene (PTFE) heating pipe 2- connecting bolt 3- ring electrode 4- guide cavities containing interface wave 5- is free of interface Waveguide cavity 6-O type sealing ring 7- insulation cover plates

Fig. 3 references：

1- polytetrafluoroethylene (PTFE) heating pipe 2- polytetrafluoroethylene (PTFE) heating pipe extending bore 3- waveguide cavity extending bores 4-, which contains, to be connect Mouth waveguide cavity 5- is free of interface wave guide cavity 6- waveguide cavity connecting bolts

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.The system schematic only illustrates that this practicality is new The basic composition of type.

Refering to Fig. 1, a kind of microwave combined heating sterilization system of continuous type fluid food ohm of the utility model as shown in Figure 1 System, comprising material pot (1a, 1b, 1c) three, including first material tank (1a), second material tank (1b), 3 material tank (1c), (13) one, check valve, screw pump (14) one, singlechip controller (6) one, annular electrode (5a, 5b) two, including the One annular electrode (5a), the second annular electrode (5b), polytetrafluoroethylene (PTFE) heating pipe (15a, 15b, 15c) three save, including first Polytetrafluoroethylene (PTFE) heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b), the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c), controllable electric power (3) is a set of, three sets of microwave heating equipment (4a, 4b, 4c), including the first microwave heating equipment (4a), Two microwave heating equipments (4b), the 3rd microwave heating equipment (4c), magnetic valve (8a, 8b) two, including the first magnetic valve (8a), Second solenoid valve (8b), pipe heat exchanger (12a, 12b) two, including the first pipe heat exchanger (12a), the second pipe heat exchanger (12b), insulating tube (11) one, (7) one, the computer containing host computer procedure, DS18B20 temperature sensors (10a, 10b, 10c, 10d) four, including the first DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 temperature sensors (10c), the 4th DS18B20 temperature sensors (10d), microwave control unit (2) one, flowmeter (9) one and the stainless steel pipes needed for connection each several part, specific operating process is as follows：Connect each section of stainless steel pipes Afterwards, following unit state is checked：Check valve (14) should be at closed mode, and the first magnetic valve (8a) is in normally open, and second Magnetic valve (8b) is in normally off；Raw material is poured into first material tank (1a)；Powered to whole system, host computer procedure will be contained Computer (7) open and load corresponding program, open singlechip controller (6), open controllable electric power (3), microwave control unit (2) it is in running order, magnetron preheating is carried out, the cooling water of the second pipe heat exchanger (12b) is unimpeded；Open screw pump (14), adjust to desired flow, liquid material enters whole system by pipeline, material pass sequentially through Manual-control one-way valve (13), Screw pump (14), into the first pipe heat exchanger (12a), when flowing through the first pipe heat exchanger (12a) for the first time, work is not preheated With after system is stable, the new material for flowing into system carries out hot friendship at the first pipe heat exchanger (12a) place and the material after heating Change, on the one hand the material after cooling insulation sterilization, is on the one hand preheated to the new material into system, to properly increase material Electrical conductivity, prepare for follow-up Ohmic heating；Material flows out the first pipe heat exchanger (12a), into polytetrafluoroethylene (PTFE) plus Hot channel, now first annular electrode (5a), the second annular electrode (5b) be powered, high potential with ground connection interphase distribution, it is micro- Ripple enters pipeline via the first microwave heating equipment (4a), the second microwave heating equipment (4b), the 3rd microwave heating equipment (4c), Material is heated under the compound action in electric field and magnetic field；Behind material outflow heating zone, insulating tube (11) is entered, is incubated With the sterilization of profound level；After material outflow insulating tube (11), the first pipe heat exchanger (12a) is entered, with newly entering system Material carries out heat exchange, and product carries out precooling processing, improves energy utilization rate；Material flows out the first pipe heat exchanger After (12a), into the second pipe heat exchanger (12b), by carrying out heat exchange with cooling water, by product cooling to required temperature； After product the second pipe heat exchanger of outflow (12b) the first magnetic valve (8a), second solenoid valve are flowed to along stainless steel pipes At shunting where (8b)；Now the first DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), The temperature data that three DS18B20 temperature sensors (10c), the 4th DS18B20 temperature sensors (10d) collect, flowmeter (9) data on flows collected, each interelectrode voltage, electric current, frequency data and the microwave that controllable electric power (7) is read The microwave power data of control unit (2) have been sent to the computer containing host computer procedure by singlechip controller (6) (7), by analysis and calculating of the host computer procedure to data, if it is determined that now reach shunting at product meet standard, then to Singlechip controller (6) sends instruction, is driven by singlechip controller (6) and opens second solenoid valve (8b) and the first electromagnetism of closing Valve (8a), product flow into second material tank (1b) by second solenoid valve (8b), if analysis through host computer procedure to data and Calculate the product for judging now to reach at shunting and be not inconsistent standardization, then do not make any action, product passes through the first magnetic valve (8a) flows into 3 material tank (1c).

During system operation, flow, voltage, three big principal element of microwave heating power are entered for different materials Row adjustment, when changing system material, voltage can be adjusted by the key-press input of singlechip controller (6) and microwave heats work( Rate, by the rotating speed of adjusting bolt pump (14) and then adjust system flow, by more than three big factors adjustment repeatedly, most Exported product is caused to reach criterion of acceptability eventually, afterwards as the driving of screw pump (14), material continuously enter system, no It is disconnected to repeat said process, you can to complete the heating sterilization of material.

Refering to Fig. 2 and Fig. 3, heating zone composition is mainly by polytetrafluoroethylene (PTFE) heating pipe (1), connecting bolt (2), ring-type electricity Pole (3), guide cavity containing interface wave (4), without interface wave guide cavity (5), O-ring seal (6), insulation cover plate (7) etc. form, heating zone Pipeline is formed by connecting using structure shown in Fig. 2 and Fig. 3 as unit, and polytetrafluoroethylene (PTFE) heating pipe (1) is machined with flange at both ends, and Uniform six screwed holes (from Fig. 3 polytetrafluoroethylene (PTFE) heating pipe (1)) on flange, in polytetrafluoroethylene (PTFE) heating pipe (1) Middle part and without being provided with extending bore at the top of interface wave guide cavity (5), it is convenient to insert sensor and the stretching of signal wire (is gathered by Fig. 3 Tetrafluoroethene heating pipe extending bore (2) and visible without interface wave guide cavity extending bore (3)), if no this item demand, extending bore by Pairing plug is sealed；Ring electrode (3) coordinates with polytetrafluoroethylene (PTFE) heating pipe (1) concentric gap, is inserted into polytetrafluoro The groove of ethene heating pipe (1) end, ring electrode (3) are lined with O-ring seal (6) between groove；Insulation cover plate (7) Moulding be middle part open round-meshed cover parts, with electrode concentric gap coordinate, electrode terminal by insulation cover plate (7) circular hole Draw；Tightened between every two sections polytetrafluoroethylene (PTFE) heating pipe by 6 connecting bolts (2)；Guide cavity containing interface wave (4) is with being free of Interface wave guide cavity (5) is connected by the connecting bolt (6) shown in Fig. 3, and is stuck in two flanges of polytetrafluoroethylene (PTFE) heating pipe (1) Place, forms the sealing to microwave, microwave imported into waveguide cavity and then transmission via the square interface in top of guide cavity containing interface wave (4) Polytetrafluoroethylene (PTFE) heating pipe (1) is crossed to heat material.

Claims

1. a kind of microwave combined heating disinfection system of continuous type fluid food ohm, it is characterised in that the system includes material pot (1a, 1b, 1c) three, including first material tank (1a), second material tank (1b), 3 material tank (1c), check valve (13) one It is individual, screw pump (14) one, singlechip controller (6) one, annular electrode (5a, 5b) two, including first annular electrode (5a), the second annular electrode (5b), polytetrafluoroethylene (PTFE) heating pipe (15a, 15b, 15c) three saves, including the first polytetrafluoroethylene (PTFE) Heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b), the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c), controllable electric Source (3) is a set of, three sets of microwave heating equipment (4a, 4b, 4c), including the first microwave heating equipment (4a), the second microwave heating dress Put (4b), the 3rd microwave heating equipment (4c), magnetic valve (8a, 8b) two, including the first magnetic valve (8a), second solenoid valve (8b), pipe heat exchanger (12a, 12b) two, including the first pipe heat exchanger (12a), the second pipe heat exchanger (12b), insulation Pipe (11) one, (7) one, the computer containing host computer procedure, DS18B20 temperature sensors (10a, 10b, 10c, 10d) four, Including the first DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 TEMPs Device (10c), the 4th DS18B20 temperature sensors (10d), microwave control unit (2) one, (9) one, flowmeter and connection Stainless steel pipes needed for each several part, wherein the outlet of the entrance of described check valve (13) and first material tank (1a) passes through method Orchid is connected with stainless steel pipes, and the porch of screw pump (14) is connect not by Quick hoop and Manual-control one-way valve (13) outlet Rust steel conduit is connected, and the cold fluid inlet of the first pipe heat exchanger (12a) exports institute by flange and Manual-control one-way valve (13) The stainless steel pipes connect are connected, and its hot fluid inlet exports connected stainless steel pipes with insulating tube (11) by flange and is connected Connect, the hot fluid outlet ports institute that the hot fluid inlet of the second pipe heat exchanger (12b) passes through flange and the first pipe heat exchanger (12a) The stainless steel pipes connect are connected, the first polytetrafluoroethylene (PTFE) heating pipe (15a) by flange with from the first pipe heat exchanger The stainless steel tube that (12a) cold fluid outlet is connect is connected, and first annular electrode (5a) and the second annular electrode (5b) are embedding respectively Add in the first polytetrafluoroethylene (PTFE) heating pipe (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoroethylene (PTFE) Between hot channel (15c), added between each length of tubing by joint seal of flanges, the first microwave heating equipment (4a), the second microwave Thermal (4b) and the 3rd microwave heating equipment (4c) are stuck in the first polytetrafluoroethylene (PTFE) heating pipe by split type structure (15a), the second polytetrafluoroethylene (PTFE) heating pipe (15b) and the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c) middle part, insulating tube (11) stainless steel pipes that entrance is connect are connected with the 3rd polytetrafluoroethylene (PTFE) heating pipe (15c) by flange, the first electromagnetism The hot fluid outlet ports that valve (8a) and second solenoid valve (8b) are connected on the second pipe heat exchanger (12b) by flange order are connect not Become rusty on steel conduit.

A kind of 2. microwave combined heating disinfection system of continuous type fluid food ohm as claimed in claim 1, it is characterised in that Described first annular electrode (5a) and the second annular electrode (5b) are used for being flowed in the second polytetrafluoroethylene (PTFE) heating pipe (15b) Dynamic liquid carries out Ohmic heating.

A kind of 3. microwave combined heating disinfection system of continuous type fluid food ohm as claimed in claim 1, it is characterised in that Described controllable electric power (3) be provided for receive from singlechip controller (6) signal with adjust output voltage realize it is controllable Heating, and the electric current for the wire being connected on electrode is measured, feed back to singlechip controller (6).

A kind of 4. microwave combined heating disinfection system of continuous type fluid food ohm as claimed in claim 1, it is characterised in that First DS18B20 temperature sensors (10a), the 2nd DS18B20 temperature sensors (10b), the 3rd DS18B20 temperature sensors (10c), the 4th DS18B20 temperature sensors (10d) use screw-type shell, screw in pipeline and seal, and are revolved by adjusting The temperature of optional position on a certain cross-section radial in pipeline can be measured by closing length.