JPS60190945A - 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] Field of Application of Industry-1-In the field of artificial insemination for the breeding of mammals in the livestock industry, etc., cryopreserved sperm is thawed and kept at a temperature that allows fertilization. This relates to a constant temperature device for artificial fertilization.

Structure of the conventional example and its problems In recent years, large-scale fertilization using frozen sperm has been carried out in the livestock industry. A method is currently being used to introduce frozen sperm pellets.

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

That is, put a specified nutrient solution in a glass beaker,
Put pressure on the container on the insulated side for 6 days and gradually turn the heat inside the container to L, and raise the temperature inside the beaker at 14.
7, and visually confirm that the temperature has reached the predetermined temperature by checking the temperature drop placed in the beaker.

However, the above method requires visual temperature confirmation,
Alternatively, there were unstable factors such as too many people in the hot water, and it involved heavy work.

Purpose of the Invention In view of the drawbacks mentioned above, the present invention provides an apparatus for automatically supplying a nutrient solution that thaws frozen sperm during artificial fertilization, accurately raises the temperature to a temperature that allows fertilization, and keeps it warm. It provides:

Structure of the Invention In order to achieve the above-mentioned objective L1, 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 device that can be opened and closed between the main bodies. an outer lid, a plurality of small containers arranged on the same circumference in the internal space of the main body, and a holder for separating and holding the small containers,
At least one of the heating elements is located on the bottom of the main body, and its shape is thinly coiled, so that temperature variations between small containers can be reduced, and therefore the nutrient solution (of IE) can be automatically heated at a constant temperature. It has been made possible to supply it.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In Figures 1 to 3, 1 is the main body outer frame with a J-bottom shape;
2 is a heat insulating material such as glass wool on the outer frame 1 of the main body 4J'3.
4 is a cylindrical inner container with a bottom, and 6 is the outer frame 1 of the main body.
The girder outer cover covers the outer frame 1 of the main body 1 in a manner that can be freely opened and closed. Reference numeral 6 denotes an inner cover made of an aluminum plate which is fixed to the inner surface of the outer cover 6 and covers the upper space 1'' of the inner container 2 in the same manner as the outer cover 6.

7 is an electric heating element wrapped around the upper outer wall of the inner container 2; 8 is an electric heating element arranged so as to surround a temperature detection device 9 attached to the center of the outer bottom surface of the inner container 2; ing.

Reference numeral 10 denotes a support frame provided on the inner bottom surface of the main body outer frame 1, and an insulating plate 11
The temperature control device 12 is supported via. Reference numeral 13 denotes a holder disposed inside the inner container 2, and a top plate having a plurality of holes 14 arranged concentrically is provided on the upper part (=1 piece).

16 is a small glass container held by the hole 14 of the holder 13, and 16 is a nutrient solution stored in this small container 15. Further, 51 is a handle provided on the top surface of the outer cover, 18 is a leg attached to the bottom of the outer frame 1 of the main body, and 19 is a neon lamp for indicating energization.

Figure 4 is an electrical circuit diagram of the thermostatic device for artificial fertilization in the example.
21 is a power source, 22 is a temperature fuse connected in series to the power source, 23 is a bidirectional three-terminal cylindrical circuit connected in parallel to control the energization of AC heating elements 7 and 80, and 24 is a temperature fuse connected in series to the power source;
is the resistor 2B, 26 connected to the neon lamp 19 by ML7.
, 271d convert the AC voltage of the power supply 21 into a DC voltage using a resistor, a rectifier diode, and a smoothing capacitor connected in series. A temperature detection device 9 consisting of resistors 2B, 29.30 and a negative characteristic thermistor constitutes a bridge circuit for the DC voltage, and its output constitutes a glitch circuit for the DC voltage, and its output is connected to a voltage comparator 31. has been done. 32 is a PNP type transistor connected to the power source 21 through a resistor 33 through a tμ connection; 34 is an NPN type transistor directly connected to the power source 21 through resistors 35 and 36;
7.38 is a base resistor which together with resistor 36 determines the operating point of transistors 32 and 34. 39 is a diode that prevents a reverse voltage from being applied between the base and emitter of the transistor 32, and 40.41 is a resistor that supplies base current to the N P N-type transistor 42 - the connection point of these resistors 40.41. P is connected to the output terminal of the voltage comparator 31. The collector terminal of the transistor 42 is connected to the connection point PK.

The operation of the thermostatic apparatus for artificial fertilization of this embodiment configured as described above will be explained below.

First, the nutrient solution is poured into the small container 16 and placed at the bottom of the inner container 2 using the holder 13. Next, the outer lid 6 is closed and the constant temperature device for artificial fertilization is energized. Then, the neon lamp 19 lights up and the resistor 25. A smoothing capacitor 27 is charged through a rectifier diode 26 to obtain a DC power supply at a temperature of 12.

In the temperature control device 12, when the temperature inside the inner container 2 is low and the resistance of the negative characteristic thermistor is high, that is, immediately after energization, the output of the voltage comparator 31 becomes a high level. Further, the transistors 32 and 34 are connected to the resistors 33.
Since it is directly connected to the power supply 21 through the resistors 33 and 35, it is turned on only when base current flows through these resistors 33 and 35. Therefore, the transistor 34 is turned off only near the low point of the power supply voltage, and is normally turned on. Therefore, the connection point P turns on the high-level transistor 42 only when the temperature is low and in the vicinity of the power supply voltage, so that the bidirectional three-terminal thyristor 23 conducts and the electric heating elements 7 and 8 are energized.

In this way, the electric heating elements 7 and 8 are energized and the inner container 2 is heated. The upper opening of the inner container 2 is closed by the inner lid 6 to form a closed space, and the heat added by the electric heating elements 7 and 8 is effectively reduced to the temperature within this closed space by the action of the heat insulating material 3.4. j(to rise.

Next, fl, l control temperature, i.e. resistance 2B, 29
, 30 and a negative characteristic thermistor, the temperature inside the inner container 2 is kept constant.

Therefore, the nutrient solution 16 contained in the inner container 2 is kept at a predetermined temperature -
After rising to L, the temperature is maintained.

As described above, it is possible to obtain a nutrient solution with a constant temperature and a constant volume necessary to thaw frozen sperm, and when a pellet of frozen sperm is placed in this nutrient solution, the sperm can be brought into a state capable of conception. can be recovered to.

In addition, the small containers 15 are installed concentrically as shown in FIG. The value remains constant. Therefore, temperature variations among the small containers can be kept small.

Effects of the Invention As described above, the present invention provides a main body equipped with a %Ht, C heating element, a temperature detection device, and a temperature control device.
It consists of an outer lid that can be opened and closed, a plurality of small containers housed around the same circumference in the internal space of the main body, and a holder that separates and holds the small containers, and at least one of the electric heating elements ,
By being located on the side of the main body and having a spiral shape, it is possible to suppress variations in temperature between small containers, allowing the inside of the small container to be quickly and accurately controlled to the set temperature.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a constant temperature device for artificial fertilization in an embodiment of the present invention, Fig. 2 is a perspective view of a holder in the embodiment, Fig. 3 is a plan view of an inner container in the embodiment, and Fig. 4 is an electrical circuit diagram in the same embodiment. DESCRIPTION OF SYMBOLS 1...Main body, 5...Outer cover, 7, 8...Group/electric heating element, 9...Temperature detection device, 12...Medium concentration control device. 13... Holder, 16... Small container. Name of agent: Patent attorney Toshio Nakao (1st person)
Go to figure 3 diagram

Claims (1)

[Claims] A main body equipped with an electric heating element, a temperature detection device, and a temperature control device, an outer layer 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 holder for separating and holding the containers, at least one of the heating elements being located on the bottom surface of the main body, and having a thinly coiled shape.