CN211645180U - Convenient constant temperature incubator - Google Patents

Abstract

The utility model discloses a convenient constant temperature incubator, which comprises an outer box and an inner box, wherein the main material of the outer box is a heat insulation polystyrene foam plastic material, the inner box is enclosed by metal sheets, and a gap is left between the foam and the aluminum sheet, so that the air circulation is convenient; the bottom of the inner cavity of the box body is provided with a low-power electric heating block, an electric fan is arranged below the electric heating block, two layers of hollowed aluminum sheets are arranged above the electric heating block, an electronic temperature control probe is arranged above the aluminum sheets, hot air circulation heating is carried out through the electric fan, and the material for static culture can be placed on the aluminum sheet at the bottom layer in the box; a low-speed motor is arranged on one side of the inner box, a turntable in the inner box is driven to rotate by the motor, a specific clamp is arranged on the turntable, the clamp can fix a penicillin bottle or a plastic centrifuge tube, and the motor is started to perform rotary shaking culture; the constant temperature incubator is mainly used for microorganism culture experiments and constant temperature reaction, can meet the requirements of clinical culture of bacteria, and is suitable for popularization and use of basic level and common farmers.

Description

Convenient constant temperature incubator

Technical Field

The utility model relates to a microbial cultivation case technical field belongs to biological apparatus technical field, specifically is a convenient constant temperature incubator.

Background

Modern biotechnology research and development is different day by day, and high-precision technologies are endlessly developed, but many technologies or methods are difficult to popularize and popularize in places with hard conditions, backward technologies and difficult economy. Therefore, small-sized equipment which is economical, light, simple and convenient but not lack modern technology is developed, and the small-sized equipment has more practical application value particularly to remote areas with harder conditions.

The basic reason of the fact that basic-level cultivation personnel cannot master the sensitivity of microorganisms in animal groups to drugs, the scientific use of the drugs and the good use of the drugs are difficult, and great blindness exists. In basic clinical practice, frequent bacteria separation or drug sensitivity experiments are urgently needed, however, practitioner background experience is complex, professional literacy is irregular, basic operation skills related to microbiological experiments are deficient, separation identification and drug sensitivity experiments of microorganisms depend on professional experimenters, and although the quantity of samples for basic clinical detection is small, a user can only send the samples to a special professional laboratory for detection frequently. Because the basic level can not carry out the detection work by itself on site, the culturist or the manager at the basic level can hardly master the sensitivity of the microorganism to the medicine in the first time, and can select the targeted medicine in time, and only blindly use the medicine, such as large dose medicine, wrong medicine and messy medicine, thereby bringing about a series of problems. An important factor that restricts the basic level from being able to carry out bacteriological susceptibility tests is the lack of economical and portable thermostatic culture equipment. The constant-temperature culture equipment is used for culturing microorganisms in an environment close to body temperature in a microorganism in-vitro state, namely the rated standard temperature is 36-37 ℃, at present, a culture box for laboratory research is various in types and various in functions, but the traditional culture box has the defects of large investment, large volume, heaviness and the like, and is not convenient to carry or move.

Constant temperature incubator that uses in the laboratory, the space is the great majority to be greater than 10L, and in order to ensure that the dispersion of temperature is less in the incubator, often adopt water proof formula constant temperature incubator, the material is mostly sheet metal, and weight is generally greater than 30kg, and is consequently heavy, because the heat conductivity of water is high, and is big than heat, and the space is great in addition, and consequently the power consumption is more, is not suitable for basic unit's clinical detection's needs. The constant temperature shaking table needs to be additionally provided with a base or the self weight to achieve the purpose of stability due to the oscillation effect, so that the constant temperature shaking table is heavy and inconvenient to move, and is not suitable for the requirement of primary clinical detection. And the number of samples detected by general clinical users is small, a constant temperature incubator which is large in space and difficult to move or store is not needed, and an economical, portable and miniature constant temperature box which meets various functional requirements at the same time is urgently needed.

Disclosure of Invention

The utility model aims at providing a portable constant temperature incubator has low-speed motor, general purpose anchor clamps, digital display accuse temperature, adjustable speed and good thermal cycle function, is the biochemical ware of multipurpose, can satisfy the basic demand that a small amount of sample was hatched with constant temperature, but the while rotary cultivation a plurality of small amount of liquid material satisfies effectively to increase the fungus and cultivates the demand. It is suitable for various scientific research departments and basic clinical sites to carry out rotary and static culture on various liquid and solid compounds such as biology, biochemistry, strains and the like.

The utility model adopts the technical scheme as follows: a portable constant-temperature incubator comprises an outer box and an inner box, wherein the outer box consists of an inwards concave box body with an opening at one side and a plugging plate matched with the inwards concave box body, the plugging plate is detachably connected with the inwards concave box body, the inner box is arranged in the outer box, the outer box is made of polystyrene foam heat-insulating materials, and a switch and a temperature controller are arranged outside the outer box; the inner box is a box-shaped structure enclosed by aluminum alloy metal sheets, a support leg is arranged on the bottom surface of the inner box, a fan hole is arranged in the center of the bottom surface, an electric fan is embedded in the fan hole, electric heating blocks are arranged above the electric fan at intervals and are electrically connected with a temperature controller, a plurality of layers of metal clapboards which are mutually spaced are arranged above the electric heating blocks, air holes are uniformly engraved in each layer of metal clapboard, the metal clapboards are spaced from the electric heating blocks, a temperature controller probe is arranged above each metal clapboard, the temperature controller probe is spaced from the metal clapboards on the inner side and is electrically connected with the temperature controller, air holes are uniformly arranged on the top surface of the inner box, a turntable is arranged on the inner side of the vertical side surface of the inner box, a clamp is arranged on the surface of the turntable facing the inner box inner cavity, the other surface of the turntable is connected with a rotating shaft comb penetrating, the inner box is provided with a door plate which can be opened and closed and is close to the vertical side surface of the plugging plate; the interval separates 0.5 ~ 2.0cm between outer case inner periphery and the inner box periphery, forms the passageway that supplies hot-blast circulation to circulate inside and outside the inner box.

Preferably, the thickness of the polystyrene foam thermal insulation material is 2-3cm, and the bottom of the polystyrene foam thermal insulation material is adhered with an anti-skid rubber mat.

Preferably, the surface of the metal sheet around the inner box is waved.

Preferably, the switch supplies power to the motor and the fan, the temperature controller and the electric heating block are connected in series, a fire wire end L of the 220V alternating current power supply is sequentially connected with the motor and the electric heating block in series and then connected with one end of an alternating current input end of the full-bridge rectifier element QZ, a zero wire end N of the 220V alternating current power supply is connected with the other end of the alternating current input end of the full-bridge rectifier element QZ, and a positive output end VCC of the full-bridge rectifier element QZ and a negative output end GND of the full-bridge rectifier element QZ are respectively connected; the temperature controller probe is a thermistor Rt with the resistance value in direct proportion to the temperature change, the temperature controller comprises a unidirectional Silicon Controlled Rectifier (SCR), a bidirectional trigger diode V1, a capacitor C1 and a potentiometer RP, the positive electrode output end VCC is connected with one end of the potentiometer RP and the movable end of the potentiometer RP, the other end of the potentiometer RP is electrically connected with one end of a capacitor C1 through the thermistor Rt, the other end of the capacitor C1 is connected with a negative electrode output end GND, the common node of the thermistor Rt and the positive electrode of the capacitor C1 is connected with one end of a bidirectional trigger diode V1, the other end of the bidirectional trigger diode V1 is connected with a unidirectional Silicon Controlled Rectifier (SCR) control electrode, the anode of the unidirectional silicon controlled rectifier is connected with the positive electrode.

Preferably, the rotating disc can also fix a plurality of penicillin bottles or 7mL plastic centrifuge tubes.

The utility model discloses profitable effect is:

the incubator passes through the hot-air inner loop, and temperature distribution is even, and the change is little, and the energy consumption is low, simple structure, the quality is light, and it is convenient to carry and remove, and occupation space is few, can satisfy rotatory and the demand of stationary culture, can adapt to some basic unit clinical demands.

Drawings

FIG. 1 is a schematic sectional view of the incubator of the present invention after being cut longitudinally along the vertical plane of the turntable;

FIG. 2 is a schematic sectional view of the incubator of the present invention after being longitudinally cut in parallel along the turntable;

fig. 3 is a schematic diagram of the control circuit of the temperature controller of the present invention.

The device comprises a box body 1, an inner box 2, a metal sheet 3, a containing space 4, a temperature sensor probe 5, a fan hole 6.1, a support leg 6.2, an electric fan 7, an electric heating block 8, a metal partition plate 9, an air hole 9.1, a front plate 10, a motor 11 and a rotating disc 12.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the accompanying drawings 1 and 2, the utility model provides a portable constant temperature incubator, the appearance is the cuboid form, the size of a dimension is 21cm x 18cm x 24cm (length x width x height), the incubator main part is including outer case 1 that has accommodation space 4 and inner box 2 by the sheetmetal 3 encloses, accommodation space 4 is arranged in to inner box 2, inner box 2 surface keeps interval 0.5-2.0cm apart with 1 internal surface at outer case to separate and arrange, form the outer passageway that supplies circulation of air between inner box and outer case, effectively maintain the stability and the even of interior intracavity temperature. The box body of the outer box 1 is made of heat-insulating polystyrene foam plastic with the thickness of 2-3cm, the thickness of 2-3cm is enough to prevent collision and is not easy to break, the thickness of 2-3cm is used for heat insulation and heat preservation, and the weight is light. Outer container 1 includes one side open-ended indent box 1.1 and can dismantle with the open end and be connected shutoff board 1.2, and shutoff board 1.2 edge is mutually supported with indent box 1.1 open end, seals the accommodation space 4 of outer container 1 when shutoff board 1.2 lid closes the open end of indent box 1.1. The inner box 2 has a space volume of 2.5-3.0L (length × width × height, 14cm × 11cm × 17cm), and can hold 10 dishes with a diameter of 9 cm. The surface of the metal sheet 3 for assembling the inner box is wavy, so that heat conduction is facilitated, hot air is circulated irregularly, and the uniformity and stability of the temperature of the inner cavity of the inner box are facilitated. A motor 11 with the rotating speed lower than 200rpm is arranged on the outer side of a metal sheet on one side of the inner box 2 far away from the plugging plate 1.2, the motor is controlled by a switch 5-2, a motor shaft passes through the metal sheet to drive a rotating disc 12 with the diameter of 9cm in the inner box 2, and the rotating disc 12 is provided with a clamp capable of fixing 6-12 penicillin bottles or other small sealable containers; the central part of the bottom surface of the inner box 2 is provided with a fan hole 6.1, an electric fan 7 is embedded in the fan hole 6.1, the bottom surface of the inner box 2 is provided with a support leg 6.2 to separate the bottom surface of the inner box 2 from the outer box 1, a low-power electric heating block 8 with the power not more than 50W is arranged at a position 0.5-1.0cm right above the electric fan 7, two layers of metal clapboards 9 with air holes 9.1 engraved therein are arranged above the electric heating block 8, the size of the metal clapboards 9 is consistent with that of the bottom surface of the inner box 2, the interval between the metal clapboards 9 is 0.2-0.5cm, the inner side of the inner box 2 is also provided with a temperature sensor probe 5, the temperature sensor probe 5 is a thermistor Rt with the resistance value in direct proportion to the temperature change and is arranged close. The top surface of the corresponding inner box 2 is also uniformly provided with air holes 9.1. The temperature controller connected with the temperature sensor probe 5 is connected with the electric heating block 8 to control the working state of the electric heating block. The control front plate 10 of the incubator is arranged on the base of the incubator, and is provided with a power switch 5-2 and a temperature controller 5-1. The inner box 2 is close to the vertical side of the blocking plate 1.2, and an openable door plate 2.1 is arranged, and the door plate 2.1 is movably connected with the inner box through a hinge 2.2.

As shown in fig. 3, a live wire end L of the 220V ac power supply is connected in series with the power switch 5-2 and the electric heating block 8 and then connected with one end of an ac input end of the full-bridge rectifier element QZ, a zero line end N of the 220V ac power supply is connected with the other end of the ac input end of the full-bridge rectifier element QZ, and a positive output end VCC of the full-bridge rectifier element QZ and a negative output end GND of the full-bridge rectifier element QZ are respectively connected with a positive electrode and a negative electrode of the temperature controller 5; the temperature controller probe 5 is a thermistor Rt with the resistance value in direct proportion to the temperature change, the temperature controller 5-1 comprises a unidirectional Silicon Controlled Rectifier (SCR), a bidirectional trigger diode V1, a capacitor C1 and a potentiometer RP, the positive electrode output end VCC is connected with one end and the movable end of the potentiometer RP, the other end of the potentiometer RP is electrically connected with one end of a capacitor C1 through the thermistor Rt, the other end of the capacitor C1 is connected with the negative electrode output end GND, the common node of the thermistor Rt and the positive electrode of the capacitor C1 is connected with one end of a bidirectional trigger diode V1, the other end of the bidirectional trigger diode V1 is connected with a unidirectional Silicon Controlled Rectifier (SCR) control electrode, the positive electrode of the unidirectional Silicon Controlled Rectifier (SCR) is connected with the positive electrode output end VCC, the negative electrode of the unidirectional Silicon Controlled Rectifier (SCR) is connected. The full-bridge rectifier element QZ charges to the C1 through Rp and Rt, when the voltage at two ends of the C1 reaches a certain value, the two-way trigger diode V1 is broken down and conducted to be in a discharging state, the one-way silicon controlled rectifier SCR is conducted at the moment, the electric heating block generates heat, when the temperature of the electric heating block rises to a certain value, the internal resistance value of the thermistor Rt is very large, the voltage falling to the C1 is small, the V1 cannot be broken down, the SCR is turned off, the corresponding electric heating block is powered off and does not work until the temperature reaches a certain value, and the control process is repeated.

When the sample is incubated statically, the rotary disc switch 5-3 is operated to close the rotary disc 12, and the power switch is turned on to enable the electric heating block and the electric fan to work, when the temperature reaches the set temperature, the electric heating block stops heating, the electric fan continuously works to maintain the circulation of hot air in the incubator, and when the temperature is lower than the set temperature, the electric heating block works to start heating.

When the sample is rotated, the turntable switch 5-3 is operated to turn on the turntable 12 to rotate the turntable and to operate the electric heating block and the electric fan.

The utility model can also optimize the outer box 1, for example, the outer box of the incubator can be designed into a cover type box body, and then the base of the incubator is connected with the inner box 2 into a whole; if the plugging plate 1.2 of the outer box 1 is provided with a hinge and a lock catch, the hinge facilitates the opening and closing of the plugging plate 1.2, the lock catch can fix and close the plugging plate 1.2, and the plugging plate 1.2 can be provided with a transparent observation window or a transparent door.

The utility model discloses can also place the inner chamber of incubator to a heat retaining closed container in the constitution incubator.

The design concept of the utility model is that the hot air carries out closed circulation inside and outside the inner box of the closed incubator, continuously contacts the heat-conducting thin metal sheet to rapidly transfer heat, and maintains the constant temperature inside the inner box. The adopted strategy is that a low-power electric heating block is arranged at the bottom of the inner box and used as a heat source, the electric fan disperses the heat, the heat generated by the electric heating block is radiated by the electric fan, the hot air uniformly disperses the heat and weakens the wind speed through a metal clapboard with a hollow hole above the electric heating block, and the upward air flow passes through a small hole at the top end of the inner box wall and flows back to the electric fan along a gap between the inner box and the box wall, so that the closed circulation of the hot air and the heating of a thin metal sheet of the inner box are realized, and the temperature stability of. Thereby the operating condition of control electric heat piece is passed through the temperature-sensing ware probe perception to the inner box temperature, and then maintains the inside temperature of incubator.

The utility model discloses a theory of operation: the low-power heater and the heat-conducting thin metal sheet are adopted to effectively maintain effective conduction of small-volume environment temperature, hot air in the incubator is subjected to internal circulation inside and outside the incubator by means of the electric fan, the thin metal sheet of the inner wall of the incubator is continuously heated, the temperature of the inner box of the incubator can be kept constant by combining the temperature sensor, meanwhile, the low-rotation-speed motor is installed to realize rotation culture of a small amount of liquid culture medium, nutrient components of the culture medium are fully utilized, the bacterial culture efficiency is improved, and the requirement of basic-level clinic on treatment of a microbial sample is met.

The utility model discloses a working effect:

experiment 1, measuring the temperature at 5 points such as four corners and the middle of an inner cavity of an inner box 2, wherein the inner box 2 uses a plane aluminum sheet 3 as an inner wall and a bottom wall to manufacture a constant-temperature incubator with a single-layer ventilated hollow aluminum plate, the temperature of the two points at the bottom corner is the highest, the numerical value is also close to the highest, the temperature changes between 36.5 ℃ and 39 ℃, and the maximum temperature change value is 2.5 ℃; the temperature of two points at the vertex angle and the temperature of the center are changed between 36 ℃ and 38 ℃, and the maximum temperature change value is 2 ℃; when the constant temperature incubator is loaded, the local temperature difference of the inner cavity of the inner box 2 is 1-2 ℃, and the temperature of the bottom corner is 1-2 ℃ higher than that of the top corner. When the plugging plate 1.2 of the outer box 1 is opened, the temperature of the inner cavity of the inner box 2 changes rapidly, the change amplitude is large, except that the temperature of a bottom angle temperature measuring point is slightly higher than the room temperature, the temperatures of other test points are close to the room temperature, the main reason is that the space of the inner cavity of the inner box 2 is small, and the high power of the electric heating block 8 is low; however, after the constant temperature incubator is closed, the inner cavity of the unloaded inner box 2 can reach the preset 37 ℃ within 2-5min, the turntable 12 loaded with ten common agar plates can reach the preset 37 ℃ within 10min, and then the observation is carried out randomly for 6h, so that the optimally designed constant temperature incubator with the double-layer ventilated hollow aluminum plate made of the corrugated aluminum sheet has the temperature change amplitude of about 0.5 ℃ and the temperature of 37 +/-0.5 ℃.

Experiment 2. the temperature test is carried out at 5 points such as four corners and the middle of the inner cavity of the inner box 2, the preset temperature is 60 ℃, the test is carried out for 6h, and the observation interval is 30 min/time. The inner box 2 is a constant temperature incubator which is made into a single-layer ventilation hollowed-out aluminum plate by taking a plane aluminum sheet 3 as an inner wall and a bottom wall, the temperature of two points at the bottom corner is the highest, the numerical value is also close to that of the two points at the bottom corner, the temperature of the two points at the top corner and the temperature of the center are changed between 58 ℃ and 62 ℃, and the temperature difference is about 2 ℃; when the constant temperature incubator is loaded, the local temperature difference of the inner cavity of the inner box 2 is large and is about 2 ℃. When the plugging plate 1.2 of the outer box 1 is opened, the temperature of the inner cavity of the inner box 2 changes rapidly, the change range is large, the temperature of other test points is close to the room temperature except that the temperature of a bottom angle temperature measuring point is slightly higher than the room temperature, but after the constant temperature incubator is closed, the inner cavity of the unloaded inner box 2 can reach the preset 60 ℃ within 5-8min, 96 PCR tubes containing 100 mu L/liquid are loaded, and the inner cavity of the inner box 2 reaches the preset 60 ℃ within 5 min. The constant temperature incubator with the double-layer ventilated hollow aluminum plate is optimally designed and made of corrugated aluminum sheets, and the temperature change range of the inner cavity of the inner box is maintained at about 0.5 ℃.

Experiment 3: aseptically extracting a small amount of liver tissues of sick chickens by using a disposable syringe with a No. 10 needle, injecting the pathological materials into a penicillin bottle with a rubber plug and pre-loaded with 2mL of culture medium, then loading the penicillin bottle onto a universal clamp on a rotary disc 12, carrying out rotary culture for 6 hours, taking 0.5-1.0mL of a coating nutrient agar plate, pasting a drug sensitive test paper sheet after no flowing liquid exists on the surface of the culture medium, standing and culturing at 37 ℃ overnight, observing the drug sensitive test result, and totally consuming less than 24 hours. The traditional drug sensitivity test is generally sent to a special laboratory, bacteria needs to be isolated and cultured under the aseptic condition for more than 12 hours, then bacterial colonies are picked out to be coated with a solid culture medium and then a drug sensitivity test is carried out for more than 12 hours, or a constant temperature shaking table is used for enrichment culture of liquid materials, then a constant temperature incubator is used for culture to carry out the drug sensitivity test, and the total consumption time is 24-72 hours.

The utility model discloses with low costs, the energy consumption is few, light, portable, multi-functional, practical, be suitable for the demand that satisfies a small amount of samples of processing, have good popularization and application and worth and prospect.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. All modifications, equivalents, improvements and the like which are made on the basis of the spirit and principles of the technical solutions described in the present invention should be included in the scope of protection of the present invention.

Claims (5)

1. The utility model provides a convenient constant temperature incubator, includes outer container (1) and inner box (2), outer container (1) by one side open-ended indent box (1.1) and constitute with indent box complex shutoff board (1.2), shutoff board (1.2) can be dismantled with indent box (1.1) and be connected, inner box (2) arrange in outer container (1), its characterized in that:

the outer box (1) is made of polystyrene foam heat-insulating materials, and a switch (5-2) and a temperature controller (5-1) are arranged outside the outer box (1); the inner box (2) is of a box-shaped structure enclosed by aluminum alloy metal sheets, support legs (6.2) are arranged on the bottom surface (6) of the inner box, a fan hole (6.1) is formed in the center of the bottom surface, an electric fan (7) is embedded in the fan hole (6.1), electric heating blocks (8) are arranged right above the electric fan (7) at intervals, the electric heating blocks (8) are electrically connected with a temperature controller (5-1), a plurality of layers of metal partition plates (9) which are mutually spaced are arranged above the electric heating blocks (8), air holes (9.1) are uniformly engraved in each layer of metal partition plate (9), the metal partition plates (9) are spaced from the electric heating blocks (8), a temperature controller probe (5) is arranged above the metal partition plates (9), the temperature controller probe (5) is spaced from the metal partition plates (9) on the inner side, the temperature controller probe (5) is electrically connected with the temperature controller (5-1), and the air holes (9.1) are uniformly arranged on the top surface of, a rotary disc (12) is arranged on the inner side of the vertical side face of the inner box, a clamp is arranged on one side of the rotary disc (12) facing the inner cavity of the inner box, the other side of the rotary disc (12) is connected with a rotary shaft comb penetrating through the inner box, the rotary shaft is driven by a motor (11) on the outer side of the inner box, and a door plate (2.1) which can be opened and closed is arranged on the vertical side face of the inner box close to the plugging plate; the interval separates 0.5 ~ 2.0cm between outer case (1) inner periphery and inner box (2) periphery, forms the passageway that supplies hot-blast circulation to circulate inside and outside inner box (2).

2. A convenient incubator according to claim 1 characterised in that: the thickness of the polystyrene foam heat-insulating material is 2-3cm, and an anti-skid rubber mat is adhered to the bottom of the polystyrene foam heat-insulating material.

3. A convenient incubator according to claim 1 characterised in that: the surface of the metal sheet around the inner box (2) is wave-shaped.

4. A convenient incubator according to claim 1 characterised in that: the switch (5-2) supplies power to the motor (11) and the electric fan (7), the temperature controller (5-1) and the electric heating block (8), a fire wire end L of the 220V alternating current power supply is sequentially connected with the switch and the electric heating block (8) in series and then connected with one end of an alternating current input end of a full-bridge rectifier element QZ, a zero line end N of the 220V alternating current power supply is connected with the other end of the alternating current input end of the full-bridge rectifier element QZ, and a positive output end VCC of the full-bridge rectifier element QZ and a negative output end GND of the full-bridge rectifier element QZ are respectively connected with a positive electrode and a negative; the temperature controller probe (5) is a thermistor Rt with the resistance value in direct proportion to the temperature change, the temperature controller (5-1) comprises a unidirectional Silicon Controlled Rectifier (SCR), a bidirectional trigger diode (V1), a capacitor (C1) and a potentiometer (RP), the positive electrode output end VCC is connected with one end and the movable end of the potentiometer (RP), the other end of the potentiometer (RP) is electrically connected with one end of the capacitor (C1) through the thermistor Rt, the other end of the capacitor (C1) is connected with a negative electrode output end GND, the common node of the thermistor Rt and the positive electrode of the capacitor (C1) is connected with one end of the bidirectional trigger diode (V1), the other end of the bidirectional trigger diode (V1) is connected with a unidirectional Silicon Controlled Rectifier (SCR) control electrode, the positive.

5. A convenient incubator according to claim 1 characterised in that: the rotating disc (12) can also fix a plurality of penicillin bottles or 7mL plastic centrifuge tubes.

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