JPS59211445A - 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 Industrial Application The present invention is applicable to freezing/insemination during artificial fertilization in the livestock industry.
This relates to a constant temperature device for artificial fertilization that thaws spermatozoa and maintains it at a temperature that allows conception.

The composition of conventional columns and their problems In recent years, artificial insemination using frozen sperm has been introduced in the breeding industry.
However, in order to restore the frozen sperm to a fertile temperature, a method is used in which the frozen sperm are placed in a nutrient solution at a constant temperature and volume.

In this method, the following methods were used to obtain a nutrient solution at a constant temperature and constant volume. That is, a predetermined nutrient solution is placed in a glass beaker, the beaker is placed in a container made of an insulating material, hot water is gradually poured into the container, and the temperature inside the beaker is raised by boiling water. A thermometer placed in the beaker is used to visually confirm that the specified temperature has been reached.

However, the method described in ``1'' involves unstable factors such as visual temperature confirmation and hot water injection.
It involved complicated work.

Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, the present invention has been made to thaw frozen sperm to a fertile temperature during artificial insemination. The device includes 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 between the main bodies, and a plurality of small containers arranged inside the main body. , and a spacer made of a foamed material that separates and holds the small container, and is designed to automatically supply a fixed amount of nutrient solution at a constant temperature.

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

In Figures 1 and 2, 1 is a bottomed cylindrical outer frame of the main body, 2 is a heat insulating material 3 such as glass wool on the outer frame 1 of the main body,
A bottomed cylindrical inner container is housed through 4, and 5 is the main body outer frame 1.
The upper opening of the outer frame 1 of the main body is covered with an outer cover rotatably attached to the outer cover 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 5, which covers the upper opening of the inner container 2 in the same manner as the outer width 5.

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 the temperature detection device 9 attached to the center of the outer bottom surface of the inner container 2; 10 is an electric heating element of the outer frame 1 of the main body. A support frame provided on the inner bottom supports the temperature control device 12 via an insulating plate 11f.

Reference numeral 13 denotes a spacer made of urethane foam placed inside the inner container 2, and has a plurality of through holes 14 provided therein. 15 is a small glass bowl inserted and held in the through hole 14 of the spacer 13, and 16 is a nutrient solution stored in the small container 15. , 17 is a handle provided on the top surface of the outer lid, 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 3 is an electrical circuit diagram of the thermostatic device for artificial fertilization according to the example.
21 is a power supply, 22 is a temperature fuse connected in series to this power supply, and 23 is an electric heating element 7 and 8 connected in parallel.
24 is a resistor connected to the neon lamp 19, 25 is a resistor, 26 is a rectifier diode, and 27 is a smoothing capacitor, each of which is connected in series. AC voltage 'f6:
Convert to current voltage. A temperature detection device 9 consisting of resistors 28, 29, 30 and a negative characteristic thermistor constitutes a bridge circuit for the DC voltage, and its output is sent to a voltage comparator 31.
It is connected to the. 32 is a PNP transistor directly connected to the power supply 21 via a resistor 33; 34 is a resistor 35.
NPN type transistors 37 and 38 directly connected to the power supply 21 via 36 are base resistors which, together with the resistor 36, determine the operating points of the 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, 40 and 41 are resistors that supply base current to the NPN transistor 42, and the connection point P of these resistors 40 and 41 is a voltage It is connected to the output terminal of the comparator 31. The collector terminal of the transistor 42 is connected to the gate terminal of the bidirectional three-terminal thyristor 23 via a resistor 43, and the collector terminal of the transistor 34 is connected to 1 and the U-cross point.

The artificial fertilization fixture of this embodiment configured like a handle/i, M
The operation of C' will be explained below.

The nutrient solution is poured into a small container 15 without stirring and placed at the bottom of the inner container 2 using a spacer 13.

Next, the outer lid 5 is closed and the constant temperature device for artificial fertilization is energized. Then, the neon lamp 19 is turned on, and the smoothing capacitor 27 is charged via the resistor 26 and rectifier diode 26 to obtain DC power for the temperature control device 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.

In addition, the transistors 32 and 34 are connected to the resistors 33, 34, and 34, as described above.
Since it is directly connected to the power supply 21 through 35'i, it is turned on only when the base current is lost through these resistors 33 and 35. Therefore, the transistor 34 is turned off only when the power supply voltage approaches zero, and is normally turned on. Therefore, the connection point P
is at a low temperature and reaches a high level only when the power supply voltage approaches the zero point, turning on the transistor 42, so that the bidirectional three-terminal thyristor 23 conducts and energizes the electric heating elements 7 and 8.

In this way, the electric heating element 7 and 8Vc are passed through to heat the inner container 2. The upper opening of the inner container 2 is closed by an inner lid 6 to form a closed space, and the inner container 2 has a closed space.
The heat added by 8 and 8 effectively increases the temperature in this closed space due to the action of L-1 adiabatic benefit 3.4. Also, the small container 15 is inserted into the through hole 14 of the spacer 130. Increased heat retention.

Next, when the control temperature reaches the temperature determined by the resistance values of the resistors 28, 29, and 30 and the temperature characteristics of the negative characteristic thermistor, the output of the voltage comparator 31 becomes a low level, so the connection point P becomes The level becomes low and the transistor 42 is not turned on. Therefore, the bidirectional three-terminal Zyristor 23 is no longer conductive, and the electric heating elements 7 and 8 are not energized and do not generate heat.

In this way, the temperature of the inner container 2 is detected by the temperature detection device 9 using a negative characteristic thermistor, and the i'iFA degree in the inner container 2 is kept constant by the temperature:Ii control device 12. Therefore, the nutrient solution 16 contained in the inner container 2 has a predetermined R1.
temperature and then maintained at that temperature.

Since the spacer 13 is made of urethane foam with high heat retention properties, even if one small container 15 is removed, the other small container 15 is not affected by any heat and is kept at a constant temperature.

It is possible to obtain a nutrient solution with a constant temperature and a constant volume necessary to thaw frozen sperm as shown in the figure below, and when a pellet of frozen sperm is placed in this nutrient solution, the sperm can be fertilized. You can try to recover it to a possible state.

Each small container has 16 layers.As mentioned above, since it is made of glass, it is hygienic and is not easily scratched.Also, since it is separated and held by a spacer 13 made of urethane foam, it is difficult to break.

FIG. 4 shows another embodiment of the present invention, in which a cylindrical spacer 63 made of urethane foam is used as a spacer, and is arranged around the outer periphery of the small container 15.

In this embodiment, even when taking out the small container 15/ξ, the spacer 53 keeps the hand number %j-: 1s 1) i1'h
, can be protected.

Note that the present invention is not limited to the above embodiments,
It can be modified and implemented as appropriate within its scope.

As described above, the present invention provides an electric heating element, a temperature detection device,
A main body equipped with a temperature control device, a spacer made of a foam material that separates and holds the small containers between the main body [an outer lid that can be opened and closed provided in one part, a plurality of small containers stored inside the main body, and a spacer that separates and holds the small containers. This device stores a fixed amount of nutrient solution for thawing frozen sperm in a small container inside the main body, and when the power is turned on and a certain period of time elapses, the nutrient solution is heated to a certain temperature and held at that temperature. be able to. Therefore, if a pellet of frozen sperm is then placed in a small container, the sperm can be easily restored to a fertile temperature. By using a spacer made of a foam material with high heat retention properties, it is possible to reduce the loss of heat from the inner container when inserting and removing the small container.
Since the temperature inside the main body can be prevented from decreasing, the nutrient solution can be efficiently preserved.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a constant temperature device for artificial insemination according to an embodiment of the present invention, Fig. 2 is an illustration of a spacer in the same embodiment, and Fig. 3 is a perspective view of an electric spacer in the same embodiment. . 1... Body outer frame (main body), 5... Outer lid,
7, 8... Electric heating element, 9... Temperature detection device, 12... Temperature control device, 13, 53...
...Spacer, 16...Small container. Name of agent: Patent attorney Toshio Hibao and 1 other person No. 1
Figure 2/4 Figure 4 Figure 5 Figure 5

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, and a plurality of small containers stored inside the main body, and the small containers are held separately. A constant temperature device for artificial fertilization with a spacer made of foam material.