JPS60190946A - Thermostatic apparatus for artificial fertilization - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a permanent product for artificial insemination, which is used in the livestock industry, etc., to thaw cryopreserved sperm and keep it at a temperature that allows fertilization during artificial insemination to prevent reproduction of mammals. It is related to the device.

Structure of conventional examples and their problems In recent years, artificial insemination using frozen sperm has been carried out in the livestock industry, but in order to restore the frozen sperm to a temperature that allows fertilization, it is necessary to freeze the sperm in a nutrient solution at a constant temperature and constant volume. One method is to introduce sperm pellets.

In this method, the following methods were used to transport a nutrient solution at a constant temperature and volume.

That is, put the specified nutrient solution in a beaker made of crow,
Place the beaker in a container made of heat insulating material, gradually pour hot water into the container, raise the temperature inside the beaker by boiling water, and then visually check the temperature with a thermometer. This is to confirm what has happened.

However, the above method has unstable elements such as visual temperature confirmation and hot water injection, and is also accompanied by complicated work.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides an apparatus that automatically supplies a nutrient solution for thawing frozen sperm, raising the temperature accurately to enable fertilization, and keeping the sperm warm during artificial insemination. It is something.

Structure of the Invention In order to achieve the above object, the constant temperature device for artificial fertilization of the present invention includes a main body equipped with an electric heating element, a temperature detection device, and a temperature control device, and a plurality of thermostatic devices arranged on the same circumference in the internal space of the main body. A small container and a holder for separating and holding the small container, and the heating element is located at the lower side of the main body, so the structure is simple and temperature fluctuations in the small container can be reduced. , it is possible to automatically supply a fixed amount of nutrient solution at a fixed temperature.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In Figs. 1 and 2, 1 is an outer frame of a flat commercial body, and 2 is a heat insulating material 3, 4 such as glass wool on the outer frame 1 of the main body.
A bottomed cylindrical inner container 6 housed through the main body outer frame 1 covers the upper opening of the main body outer frame 1 with an outer lid rotatably mounted on the main body outer frame 1 so as to be openable and closable. Reference numeral 6 denotes an inner cover made of an aluminum plate fixed to the inner surface of the outer cover 6, which covers the upper opening of the inner container 2 in the same manner as the outer cover 5.

Reference numeral 7 denotes an electric heating element wrapped around the lower outer wall of the inner container 2, 8 a temperature detection device located at the center of the bottom surface of the outer lid, and 9 a support frame provided on the inner bottom surface of the outer frame 1 of the main body through an insulating plate 1o. and supports the temperature control device 11.

Reference numeral 12 denotes a holder disposed inside the inner container 2, and a top plate having a plurality of holes 13 arranged concentrically is attached to the upper part. A small glass container 15 held by the hole 13 of the holder 12 is a nutrient solution stored in the small container 14 . Reference numeral 16 designates a pusher 17 provided on the upper surface of the outer lid, and reference numeral 18 designates a neon lamp for indicating energization.

Figure 3 is an electrical circuit diagram of the thermostatic device for artificial fertilization according to the example.
2o is a power supply, 21 is a temperature fuse connected in series to the power supply of the cigarette, 22 is a bidirectional three-terminal thyristor for controlling the energization of the electric heating element 7 connected in parallel, and 23 is a resistor 24 connected to the neon lamp 18. 25 and 26 convert the AC voltage of the power source 2° into DC voltage using a resistor, a rectifier diode, and a smoothing capacitor, which are connected in series. Resistance 27,2
Temperature detection device 8 consisting of 8°29 and a negative characteristic thermistor constitutes a fritno circuit for the DC voltage, and its output constitutes a fritno circuit for the DC voltage;
The output is connected to a voltage comparator 3o. 31 is resistance 3
2 is a PNP type transistor connected directly to the power supply 20 via a resistor 34, 33 is an NPN type transistor directly connected to the power supply 2o via a resistor 34. Determine the operating point. 38) a diode that prevents reverse voltage from being applied between the base of the runno star 31 and the vine;
Reference numeral 9.40 is a resistor for supplying base current to the NPN transistor 41, and a connection point P of these resistors 39.40 is connected to the output terminal of the voltage comparator 30. The collector terminal of the transistor 41 is connected to the connection point P.

The operation of the constant temperature device for the Jiouke+11J of this embodiment constructed as described above will be described below.

First, a nutrient solution is poured into the small container 14 and placed at the bottom of the inner container 2 using the holder 12. Next, the outer lid 5 is closed and the constant temperature device for artificial fertilization is energized. Then, the neon lamp 18 lights up, the smooth content 26 is charged via the resistor 24 and the rectifier diode 25, and the DC power source of the temperature control device 12 is turned off.

In the temperature control device 11, when the temperature inside the inner container 2 is low and the resistance of the negative characteristic thermistor 8 is high, that is, immediately after energization, the output of the voltage comparator 30 becomes a high level. Since the switched transistors 31 and 33 are directly connected to the power supply 20 through the resistors 32 and 34 as described above, they are turned on only when the base current flows through these resistors 32 and 34. Therefore, the transistor 33 is turned off only near the zero point of the power supply voltage, and is normally turned on. Therefore, the connection point P is at a low temperature and reaches a high level only near the zero point of the power supply voltage, turning on the transistor 41, so that the bidirectional three-terminal IJ star 22 becomes conductive and energizes the electric heating element 7.

In this way, the electric heating element 7 is energized and the inner container 2 is heated. The upper opening of the inner container 2 is closed by an inner lid 6 to form a closed space, and the heat added by the electric heating element 7 effectively increases the temperature in this closed space by the movement of the heat insulating materials 3 and 4. .

Next, the temperature inside the inner container 2 is kept constant by temperature control, that is, by the temperature detection device 12 consisting of the resistance values of the resistors 27, 28, and 29 and a negative characteristic thermistor.

Therefore, the nutrient solution 15 contained in the inner container 2 starts to rise to a predetermined temperature and then is maintained at that temperature.

As described above, it is possible to obtain a nutrient solution at a constant temperature and a constant volume necessary to thaw frozen sperm, and when pellets of frozen sperm are placed in this nutrient solution, the sperm are restored to a state capable of fertilizing. be able to.

In addition, since the electric heating element is wrapped around the lower side of the main unit, it increases the temperature of the bottom of the main unit by heat conduction, creating both a heat path that transfers heat to the small container and a heat path that increases the temperature of the internal space of the main unit. This simplifies the structure by allowing one electric heating element to be used instead of two on the bottom and side surfaces of the main body.

Furthermore, since no electric heating element is installed on the bottom surface, the temperature distribution at the bottom of the main body is uniform on the same circumference. Therefore, by arranging the small containers on the same circumference, temperature variations among the small containers can be reduced.

Effects of the Invention As described above, the present invention includes an electric heating element, a temperature detection device,
A main body equipped with a temperature control device, an outer lid that can be opened and closed provided at the closing part of the main body, a plurality of small containers stored on the same circumference in the internal space of the main body, and a holder for separating and holding the small containers. By positioning the electric heating element at the bottom of the side of the main body, the structure is simple and the temperature variation in the small container can be reduced, so the inside of the small container can be quickly and precisely controlled at the set temperature 1. can.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a constant temperature device for artificial fertilization according to an embodiment of the present invention, FIG. 2 is a perspective view of a holder in the same embodiment, and FIG. 3 is an electric circuit diagram in the same embodiment. 1...Main body, 2...Outer cover, 7...
... Electric heating element, 8 ... Temperature detection device, 11.
...Temperature control device, 12...Holder, 1
4...Small container.

Claims (1)

[Claims] A main body equipped with an electric heating element, a temperature detection device, and a temperature control device, an outer lid that can be opened and closed provided at the opening of the main body, a plurality of small containers arranged on the same circumference in the internal space of the main body, and A constant temperature device for artificial fertilization, comprising: a holder for separating and holding a small container, and the heating element is located at a lower side of the main body.