CN201701948U - Split thermostatic medium bathtub - Google Patents

Abstract

The utility model relates to a constant temperature water bath pot or a constant temperature oil bath pot. Split-type constant temperature medium bath, which includes a temperature controller, a heater, and a container; the container contains a medium, and the medium is water or oil; the heater is an electric heating tube, an electric heating furnace or an infrared lamp; one end of the power cord It is connected with the heater; the thermostat includes a shell, a control circuit, and a temperature sensor. The shell includes a cover plate and a metal box, and the cover plate is connected with the metal box by screws; the temperature sensor of the thermostat is located in the medium in the container; its It is characterized in that: there is a controlled output power socket on the cover of the thermostat, the other end of the power cord connected to the heater is provided with a power plug, and the power plug is inserted into the controlled output power on the cover of the thermostat in the socket. The container of the constant temperature medium bath can be replaced, and the replacement of the container is convenient and simple; the container can be arbitrarily assembled and replaced by the user according to the experimental requirements, so as to control the constant temperature of the water bath or oil bath with different volumes.

Description

Split type constant temperature medium bath

technical field

The utility model relates to a constant temperature water bath pot or a constant temperature oil bath pot.

Background technique

The current commercially available constant temperature water bath or constant temperature oil bath is composed of three parts: a temperature controller (the temperature controller is referred to as a temperature controller, and the temperature sensor is a part of the temperature controller), a heater (or a temperature riser), and a container. Fixed as a whole, the volume of the container is constant. For the experimental teaching of the user units, especially colleges and universities, due to the different shapes and sizes of the thermostats required in the experiment, the volume requirements of the water bath or oil bath are different. Therefore, it is necessary to purchase water baths and oil baths of various volumes. This costs a lot of money and takes up laboratory space. Moreover, when one of the parts is damaged, the rest of the parts are also scrapped, which is a big waste and is not conducive to sustainable development.

Analyzing the current constant temperature water baths or constant temperature oil baths, it is found that for constant temperature water baths or constant temperature oil baths of the same manufacturer with different volumes, except for the difference in the volume of the container, the rest of the components are basically the same.

Contents of the invention

The purpose of the utility model is to provide a split type constant temperature medium bath, the container of the split type constant temperature medium bath can be replaced, and the replacement of the container is convenient and simple.

In order to achieve the above object, the technical solution adopted by the utility model is: a split-type constant temperature medium bath, which includes a temperature controller, a heater, and a container; the container contains a medium, and the medium is water or oil; the heater is Electric heating tube, electric heating furnace or infrared lamp, etc. When the heater is an electric heating tube, the electric heating tube is located in the medium in the container; when the heater is an electric heating furnace, the electric heating furnace is located below the container, and the heater is an infrared When the light is on, it is located around the container; one end of the power cord is connected to the heater; the thermostat includes a shell, a control circuit, a temperature sensor, the shell includes a cover plate and a metal box, and the cover plate is connected to the metal box by screws; the thermostat The temperature sensor is located in the medium in the container; it is characterized in that: there is a controlled output power socket on the cover of the thermostat, and the other end of the power cord connected to the heater is provided with a power plug, and the power plug is inserted into the temperature controller. controlled output power socket on the cover of the controller.

The beneficial effects of the utility model are: the temperature controller (with temperature sensor), the heater, and the container adopt a combined structure (the temperature controller, the heater, and the container become independent parts), and the container of the split type constant temperature medium bath Replaceable, and the container replacement is convenient and simple; plug and play, the container can be assembled and replaced by the user according to the experimental requirements, so as to control the constant temperature of water baths or oil baths with different volumes. When a certain part is damaged, it is easy to repair.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the front view of the utility model thermostat.

Fig. 3 is a schematic diagram of the internal structure of the temperature controller of the present invention.

Fig. 4 is a rear view of the utility model thermostat.

Fig. 5 is a schematic diagram of components and connections of the thermostat of the present invention.

Fig. 6 is a schematic circuit diagram of the control circuit of the temperature controller of the present invention.

In the figure: 1-cover plate, 2-setting panel, 3-LED digital tube, 4-increment key, 5-setting key, 6-decrement key, 7-computer interface, 8-temperature sensor interface, 9-switch, 10 -LED indicator light, 11-output power socket, 12-skeleton, 13-metal box, 14-control circuit board (or signal processing circuit board), 15-DC power board, 16-drive board, 17-input power socket , 18-3 mm two-channel audio plug, 19-3-core shielded cable, 20-temperature sensor, 21-power plug, 22-power cord, 23-heater, 24-container.

Detailed ways

As shown in Figure 1, the split-type constant temperature medium bath includes a temperature controller, a heater (or a temperature riser), and a container; the container contains a medium, and the medium is water or oil; the heater is an electric heating tube (electric heating rod), electric heating furnace or infrared lamp, etc., when the heater is an electric heating tube (electric heating rod, a single-head electric heating rod is used in the figure of this embodiment), the electric heating tube is located in the medium in the container, and the heater is an electric heating tube. When heating the furnace, the electric heating furnace is located below the container, and when the heater is an infrared lamp, it is located around the container; one end of the power line 22 is connected to the heater 23; the temperature controller includes a housing, a control circuit, and a temperature sensor, and the control circuit is located at In the housing, the housing includes a cover plate and a metal box, the cover plate is connected to the metal box by screws; the temperature sensor 20 of the thermostat is located in the medium in the container; the cover plate 1 of the thermostat is provided with a controlled output power supply Socket 11, the other end of the power line 22 that links to each other with heater 23 is provided with power plug 21, and power plug 21 inserts in the controlled output power socket 11 on the cover plate of thermostat (namely, on the thermostat, add controlled The output power socket, the heater and the thermostat adopt a plug-in connection, and it is very convenient to disconnect the heater from the thermostat).

The cover plate 1 of the thermostat is provided with a temperature sensor interface 8, the temperature sensor interface adopts a 3mm dual-channel audio socket, and the left channel pin of the 3mm dual-channel audio socket is connected to the thermostat. The positive pole of the power supply of the control circuit, the right channel pin of the 3mm two-channel audio socket is connected to the signal acquisition end of the control circuit of the thermostat, and the common end of the 3mm two-channel audio socket is connected to the ground of the control circuit of the thermostat end; one end of the 3-core shielded cable 19 of the temperature sensor 20 is provided with a 3 mm two-channel audio plug 18, the tail end contact (corresponding to the common end) and the middle end contact (corresponding to the right sound) of the 3 mm two-channel audio plug channel pin), the top contact (corresponding to the left channel pin) respectively corresponds to the ground pin, signal pin, and power pin (positive pole of the power supply) of the DS18B20 chip connected to the temperature sensor; 3 mm two-channel audio plug 18 is inserted into In the temperature sensor interface 8.

The cover plate 1 of the thermostat is provided with an RS232 communication cable microcomputer interface 7, and the RS232 communication cable microcomputer interface adopts a 3 millimeter two-channel audio socket, and the left channel signal pin of the 3 millimeter two-channel audio socket Connect to the TOUT terminal of the MAX232 chip of the control circuit (corresponding to the RXD of the microcomputer), 3mm The right channel signal pin of the two-channel audio socket is connected to the RIN terminal of the MAX232 chip of the control circuit (corresponding to the TXD of the microcomputer), 3 mm The common end of the dual-channel audio socket is connected to the ground terminal (common ground) of the control circuit; one end of the RS232 communication cable is provided with a 3mm dual-channel audio plug, and the 3mm dual-channel audio socket is inserted with a 3mm dual-channel audio plug , the tail contact of the 3mm dual-channel audio plug is in contact with the common end of the 3mm dual-channel audio socket, the middle contact of the 3mm dual-channel audio plug is in contact with the right sound of the 3mm dual-channel audio socket The top contact of the 3mm two-channel audio plug is in contact with the left channel pin of the 3mm two-channel audio socket; the other end of the RS232 communication cable is provided with a 9-hole D-type plug, and the D-type Insert the plug into the COM1 or COM2 interface of the microcomputer, the end contact of the 3mm dual-channel audio plug is connected to the common ground of the microcomputer, the middle end of the 3mm dual-channel audio plug is connected to the TXD of the microcomputer, and the 3mm dual-channel The top of the audio plug is connected to the RXD of the microcomputer.

The input power socket 17 is connected with the mains by a plug with a lead, and the input power socket 17 provides power to the circuit of the thermostat. The socket 11 is connected to provide adjustable power supply to the heater.

Described container is metal container, glass container, also can be plastic container (purchase required container from vessel market), but plastic container can only be used in combination with the electric heating rod that immersion mode heats up.

As shown in Figure 2, Figure 3, Figure 4, Figure 5, and Figure 6, the thermostat includes: a cover plate 1, a setting panel 2, a control circuit board (or a signal processing circuit board, on which a control circuit ) 14, switch 9, output power socket 11, skeleton 12, metal box 13, DC power supply board 15, drive board 16, input power socket 17 with fuse, temperature sensor 20 with cable;

The temperature sensor adopts DS18B20 digital temperature sensor, the processor adopts STC12C5410AD single-chip microcomputer, the display adopts 8-bit LED digital tube, the driver adopts BTA20 thyristor, the panel adopts HY118 switch socket panel, and the metal box (box) adopts aluminum alloy box.

The control circuit board 14 is a double-sided welded rectangular printed circuit board. When the unit of measurement is millimeters, the allowable error ± 0.2 millimeters, when the lower left corner is the coordinate origin, the coordinates of the upper right corner are (36.5, 71.5), and in In the rectangular area where point (3.0, 37.8) and point (33.7, 69.3) are diagonal, there are 2 models of but not limited to TOF-3461AH-B four-digit LED digital tube, in the point (1.7, 21.5) and There are 3 touch buttons in the diagonal rectangle area of point (34.4, 27.9), and 2 touch buttons with inner diameter of 3 in the rectangle area with point (2.9, 0.5) and point (33.5, 8.2) as diagonal mm dual-channel audio socket (or 3mm dual-channel audio socket);

Set panel 2 as a rectangle. When the unit of measurement is millimeters, the allowable error is ±0.2 millimeters, and the lower left corner is the origin of the coordinates, the coordinates of the upper right corner are (38.0, 73.0), and the point (2.5, 39.5) and the point ( 35.5, 69.5) as the diagonal rectangular area is red and transparent, in the rectangular area with the point (2.0, 22.0) and the point (10.0, 30.0) as the diagonal, the point (15.0, 22.0) and the point (23.0, 30.0) are The diagonal rectangular area, the point (27.0, 22.0) and the point (35.0, 30.0) are the diagonal rectangular area, each has a key membrane, and the point (10.5, 6.0) and the point (27.5, 6.0) are the centers of the circle Each has a circular hole with a diameter of 6.5 mm.

Fig. 6 is the circuit schematic diagram of the control circuit of the utility model thermostat, and the list of components and parts is as follows:

serial number symbol name Model/parameter serial number symbol name Model/parameter 1 BD1 rectifier diode 1N4007 31 K2 Touch the button DEC 2 BD2 rectifier diode 1N4007 32 LED H 4 digit LED digital tube TOF-3461AH-B 3 BR1 resistance 150K 33 LEDL 4 digit LED digital tube TOF-3461AH-B 4 BR2 Resistance 150K 34 PR1 exclusion 121*6P 5 RLED red light emitting diode 3mm 35 PR2 exclusion 121*7P 6 GLED green light emitting diode 3mm 36 Q1 Triode 2S9012

7 C1 electrolytic capacitor 10UF 37 R1 Resistance 10K 8 C2 ceramic capacitor 30PF 38 R2 Resistance 1K 9 C3 ceramic capacitor 30PF 39 R3 Resistance 100 10 C4 electrolytic capacitor 10UF 40 R4 Resistance 0402/51K 11 C5 Tantalum capacitor 0408/1UF 41 R5 Resistance 0402/51K 12 C6 Tantalum capacitor 0408/1UF 42 R6 Resistance 0402/51K 13 C7 Tantalum capacitor 0408/1UF 43 R7 Resistance 0402/5.1K 14 C8 Tantalum capacitor 0408/1UF 44 R8 Resistance 0402/5.1K 15 C9 electrolytic capacitor 1600UF 45 R9 Resistance 0402/5.1K 16 CZ1 Controller power input socket IN220/10A 46 R10 resistance 2.2K 17 CZ2  Controlled power output socket HY118Z13/10A 47 R11 resistance 10K 18 D1 rectifier diode 1N4007 48 R12 Resistance 5.1K 19 DQ Digital temperature sensor DS18B20 49 R13 resistance 330 20 DYB Switching power supply module 5V/1A 50 CT2 load plug IN220/10A twenty one F1 Fuse 10A 51 RL load 30～70/1.5KW twenty two FMQ Buzzer 5V 52 SN1 Connector 13P twenty three IC1 chip STC12C5410AD 53 SN2 Stereo socket 3MMCZ twenty four IC2 chip MAX232 54 SN3 Stereo socket 3MMCZ 25 IC3 chip CD4051 55 SW1 switch HY118K11/10A 26 IC4 chip MOC3041 56 T1 Thyristor BTA20

27 J1 Hole type D socket F9P 57 TX stereo plug 3MMCT 28 JZ1 crystal oscillator 11.0592M 58 WD stereo plug 3MMCT 29 K0 touch button SET 59 ZCT1 Main power cord plug I IN220/10A 30 K1 touch button INC 60 CT1 General power cord plug 0 OUT220V/10A

The meaning of STC12C5410AD pins and I/O ports is as follows:

Pin port Control instructions Pin port Control instructions 1 P2.2 Segment code c, H=on, L=off 28 VCC +5V 2 P2.3 Segment code d, H=on, L=off 27 P2.1 Segment code b, H=on, L=off 3 RST Reset 26 P2.0 Segment code a, H=on, L=off 4 RXD/P3.0 take over 25 P1.7 Display 3/8 decoding C 5 TXD/P3.1 send twenty four P1.6 Display 3/8 decoding B 6 XTAL2 crystal oscillator twenty three P1.5 Display 3/8 decoding A 7 XTAL1 crystal oscillator twenty two P1.4 Drive 2, H=on, L=off 8 P3.2 Digital temperature sensor data port twenty one P1.3 Spare 9 P3.3 Buzzer, H=dumb, L=loud 20 P1.2 INC key 10 P3.4 Spare 19 P1.1 DEC key 11 P3.5 Power off, H=No, L=Yes 18 P1.0 SET key

12 P2.4 Segment code e, H=on, L=off 17 P3.7 Drive 1, H=on, L=off 13 P2.5 Segment code f, H=on, L=off 16 P2.7 Segment code h, H=on, L=off 14 GND land 15 P2.6 Segment code g, H=on, L=off

As shown in Figure 3, the cover plate 1, the switch 9, the output power socket 11, and the frame 12 belong to the components of the HY118 four-hole switch socket panel. The control circuit board 14 can be embedded in the frame 12, and occupies two mounting holes in the frame 12. The control circuit board 14 is rectangular, 36.5 mm wide, and 71.5 mm long. The front side of the control circuit board 14 is welded with two four-digit LED numbers Pipe 3 is also welded with three buttons, i.e. increment key 4, setting key 5, and decrement key 6. Two 3 mm inner diameter dual-channel sockets (3 mm dual-channel audio sockets) are also welded, and one socket is used for microcomputer interface 7, Another socket is used for temperature sensor interface 8. An LED indicator light 10 is installed in the output power socket 11 . The skeleton 12 is connected with the metal box 13 with two M4 screws. The DC power board 15, the driving board 16, and the input power socket 17 are fixed on the inner wall of the metal box 13. The setting panel 2 can be embedded in the cover plate 1. The setting panel 2 is rectangular, 38 mm wide and 73 mm long. It is composed of an aluminum liner covered with PVC film, with a silver gray background and black characters. The upper part is a red transparent window, and the middle part has 3 An 8mm*8mm protruding key mold, and two round holes with a diameter of 6.5mm are opened on the lower part for installing a stereo audio socket.

Fig. 5 is a schematic diagram of the parts and connections of the utility model thermostat, the parts include: a power socket 1U with a fuse, a switch 2U, a socket 3U with a two-color LED indicator light, a control circuit board (or signal Processing circuit board) 4U, a DC power supply board 5U, a drive circuit board 6U, a power cord 7U, temperature sensor with cable 8U, computer communication cable 9U, stainless steel single-head electric heating rod with cable 10U.

The 8U temperature sensor with cable is composed of a 3mm two-channel audio plug and a cable connected to a DS18B20 digital temperature sensor. The cable length is at least 2 meters and can be as long as 30 meters. That is, use a 3-core shielded cable to connect the ground, signal, and power 3 pins of the DS18B20 chip to the 3 contacts of the dual-channel plug, and the tail end contact is grounded, the middle end contact is connected to the signal, and the top end contact is connected to the power supply. . When measuring temperature, plug into the CZ2 socket in the control circuit board 4U.

The RS232 microcomputer communication cable 9U based on the dual-channel plug is composed of a 3mm dual-channel audio plug and a cable connected to a 9-hole D-type plug. And the tail end contact of the dual-channel plug is grounded, the middle end contact is connected to No. 2 hole, and the top end contact is connected to No. 3 hole. When communicating with the microcomputer, insert it into the CZ1 socket in the control circuit board 4U. Stainless steel single-head electric heating rod with cable 10U, power 1KW, plug into the socket 3U with two-color LED indicator light when in use.

Claims (3)

1. Split-type constant temperature medium bath, which includes a temperature controller, a heater, and a container; the container contains a medium, and the medium is water or oil; the heater is an electric heating tube, an electric heating furnace or an infrared lamp, and the heater When it is an electric heating tube, the electric heating tube is located in the medium in the container; when the heater is an electric heating furnace, the electric heating furnace is located below the container; when the heater is an infrared lamp, it is located around the container; one end of the power cord is connected to the heater Connected; the thermostat includes a shell, a control circuit, and a temperature sensor. The shell includes a cover plate and a metal box, and the cover plate is connected to the metal box by screws; the temperature sensor of the thermostat is located in the medium in the container; it is characterized in that: A controlled output power socket is arranged on the cover plate of the thermostat, and the other end of the power cord connected to the heater is provided with a power plug, and the power plug is inserted into the controlled output power socket on the cover plate of the thermostat. 2. The split type constant temperature medium bath according to claim 1, characterized in that: the cover plate of the thermostat is provided with a temperature sensor interface, and the temperature sensor interface adopts a 3 mm two-channel audio socket, and The left channel pin of the 3mm dual-channel audio socket is connected to the positive pole of the power supply of the control circuit of the thermostat, and the right channel pin of the 3mm dual-channel audio socket is connected to the signal acquisition terminal of the control circuit of the thermostat, 3 The common terminal of the 3mm dual-channel audio socket is connected to the ground terminal of the control circuit of the thermostat; one end of the 3-core shielded cable of the temperature sensor is provided with a 3mm dual-channel audio plug, and the tail end of the 3mm dual-channel audio plug contacts The point, the middle contact, and the top contact respectively correspond to the ground pin, signal pin, and power pin of the DS18B20 chip connected to the temperature sensor; the 3mm two-channel audio plug is inserted into the temperature sensor interface. 3. The split-type constant temperature medium bath according to claim 1, characterized in that: the cover plate of the temperature controller is provided with an RS232 communication cable microcomputer interface, and the RS232 communication cable microcomputer interface adopts a 3 mm dual channel Audio socket, and the left channel signal pin of the 3mm two-channel audio socket is connected to the TOUT terminal of the MAX232 chip of the control circuit, and the right channel signal pin of the 3mm two-channel audio socket is connected to the RIN terminal of the MAX232 chip of the control circuit The common end of the 3mm dual-channel audio socket is connected to the ground terminal of the control circuit; one end of the RS232 communication cable is provided with a 3mm dual-channel audio plug, and the 3mm dual-channel audio socket is inserted with a 3mm dual-channel audio plug , the tail contact of the 3mm dual-channel audio plug is in contact with the common end of the 3mm dual-channel audio socket, the middle contact of the 3mm dual-channel audio plug is in contact with the right sound of the 3mm dual-channel audio socket The top contact of the 3mm two-channel audio plug is in contact with the left channel pin of the 3mm two-channel audio socket; the other end of the RS232 communication cable is provided with a 9-hole D-type plug, and the D-type Insert the plug into the COM1 or COM2 interface of the microcomputer, the end contact of the 3mm dual-channel audio plug is connected to the common ground of the microcomputer, the middle end of the 3mm dual-channel audio plug is connected to the TXD of the microcomputer, and the 3mm dual-channel The top of the audio plug is connected to the RXD of the microcomputer.

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