JPH0624153Y2 - Heater for ornamental fish tank - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is an ornamental fish aquarium, in which only the mechanism is placed and the water in the aquarium is kept at a constant temperature set by an electric controller. The present invention relates to a fish tank heater.

<Prior Art> As is well known, since tropical freshwater fish and saltwater fish that are bred for ornamental use inhabit at a water temperature of approximately 26 to 30 degrees, the temperature of water in the aquarium to be bred also increases. Always 26-3
You have to keep it around 0 degrees.

As a water temperature maintaining means for that purpose, so-called electronic thermostats and heaters are often used,
Conventionally, a thermostat temperature detection unit and a heater are separately installed in the water tank, and each cord is individually laid from the inside of the water tank to the outside and connected to the controller unit of the thermostat, and the water temperature is set by the controller unit. Was kept constant.

<Problems to be solved by the invention> In the above-mentioned conventional structure, since there are at least two cords in the aquarium, it is not preferable in terms of appearance, and the commercial value is inferior in the ornamental fish aquarium where aesthetics are important .

Also, in the temperature detecting part of the thermostat, the cord extends against the flow of water in the water tank due to the filter and air bubbles, but when the flow of water becomes violent, the cord is pulled strongly, so the main body of the detector is It may come off from the holder adsorbed on the inner surface of the glass.In that case, the position of the detector can be changed freely to some extent, so depending on the state of the water flow, it may be moved to a position where it is directly heated by the heater and correct. It becomes impossible to detect the water temperature, which causes a disadvantage that the predetermined water temperature cannot be maintained. Further, a water heater for a water tank in which a heater wire and a thermostat are housed inside a glass tube is also described, for example, in Japanese Utility Model Publication No. 50-31566.

However, the above-mentioned water heater has a low accuracy because the water temperature is controlled by bimetal, and since the bimetal is inside the glass tube, the whole water heater cannot be submerged, and the heater wire and the bimetal are located in the water. Even if it is made, water leaks from the upper end and electric leakage occurs, or the bimetal does not operate normally and the water temperature rises or falls abnormally, causing an accident in which the breeding fish die. Therefore, there is a demand for a heater for an aquarium fish tank, which has an extremely simple structure and is of practical value without causing electric leakage or abnormal operation.

<Means for Solving Problems> The present invention has been proposed in view of the above-mentioned conventional drawbacks and in response to the conventional demand, and is an electrical system having a dial for setting the temperature inside the water tank. Two cords are extended from the controller part, and a power plug is attached to the tip of one of the cords, and a mechanical part is connected to the other cord, and the mechanical part is in the middle of the tubular outer shell. A heat-insulating partition is provided on the inner wall to partition the temperature detecting portion having the temperature sensitive element and the heat generating portion having the heater wire so as to be adjacent to each other in the length direction of the outer shell, and a code for the electrical controller portion and the mechanical portion. With four core wires, the two core wires connect the electric controller and the temperature sensing element of the temperature detector, and
It is characterized in that the other two core wires are passed through the partition wall to connect the electric controller part and the heater wire of the heat generating part.

<Embodiment> The present invention will be described below based on an embodiment of the drawings.

As shown in FIG. 1, the ornamental fish tank heater 1 of the present invention
Has two cords 3 and 3'extended from an electric controller unit 2 having a dial for setting the temperature of water in the water tank. One cord 3 is provided with a power plug 4 at its tip and the other cord 3 is attached. The cord 3'is connected to the mechanical portion 5.

As shown in FIG. 2, the mechanical part 5 described above is provided with a heat-insulating partition wall 7 in the middle of a cylindrical outer shell 6 made of heat-resistant glass or other material, and a temperature detecting part 8 and a heat generating part 9 are provided. And are partitioned and formed so as to be adjacent to each other in the length direction of the outer shell 6.

Caps 1 made of rubber are provided on both ends of the outer shell 6 described above.
The cords 0 and 10 'are liquid-tightly and airtightly fitted and closed, and the cord 3'is passed through the cap 10 which closes the temperature detecting portion 8. The cord 3'has four cores, and two core wires are connected to a temperature sensing element (thermistor) 11 provided in the temperature detecting section 8.

The other two core wires of the cord 3'are insulated by the partition wall 7
Through the heating element 9 and is connected to the heater wire 12 provided in the heating element 9. The heater wire 12 is held by a supporting plate 13 having an insulating property and heat resistance, and heats when energized.

The heat insulating partition wall 7 is for preventing heat from being transferred to the temperature detecting portion 8 by the heater wire 12. Further, it is preferable to fill the temperature detecting portion 8 with silicon resin or the like to hold the core of the temperature sensitive element 11 or the cord 3 '.

The heater 1 of the present invention has the above-described structure, and in use, the mechanism portion 5 is arranged inside the water tank filled with water, and the power plug 4 is inserted into the power outlet. Then, when the dial of the electric controller unit 2 is operated to set a predetermined temperature, the temperature sensing element 11 of the temperature detection unit 8 detects the water temperature in the water tank and supplies a signal to the electric controller unit 2. If the water temperature is equal to or lower than the set temperature of the electric controller unit 2, an electric current is passed from the electric controller unit 2 to the heater wire 12 of the heat generating unit 9 to heat it. However, if the water temperature is equal to or higher than the set temperature of the electric controller unit 2, the current flowing through the heater wire 12 is cut off.

Therefore, the temperature sensing element 11 of the temperature detection unit 8 detects the water temperature, and if the temperature is below the set temperature, the heat generating unit 9 warms the water in the water tank, and if it is above the set temperature, the heating is stopped, so the water tank is always The water inside is maintained at a constant temperature, and it is possible to maintain the optimum water temperature for growing ornamental fish.

The present invention has been described above based on the embodiments of the drawings, but the present invention is not limited to the above-described embodiments, and may be implemented in any manner as long as the configuration described in the claims for utility model is not changed. be able to.

<Effects of the Invention> In short, according to the present invention, two cords are extended from an electric controller section having a dial for setting the temperature inside the water tank, and one of the cords has a power plug attached to the tip thereof. At the same time, a mechanical portion is connected to the other cord, and the mechanical portion has a temperature detecting portion having a temperature sensing element by providing a heat insulating partition in the middle of the cylindrical outer shell and a heat generating portion having a heater wire. Are formed so as to be adjacent to each other in the length direction of the outer shell, and the cords of the electric controller section and the mechanical section are 4
The two core wires are connected to the electric controller section and the temperature sensing element of the temperature detecting section, and the other two core wires are passed through the partition wall to connect the electric controller section and the heat generating section. It is characterized in that it is connected to a heater wire.

Therefore, the temperature sensing element detects the water temperature and supplies a signal to the electric controller simply by installing the mechanism in the water tank, and the heater wire is based on the temperature set in the electric controller by an external operation. Since the water temperature in the aquarium can be controlled with high accuracy by passing an electric current to the water tank, an appropriate water temperature can be maintained with high precision according to the type of ornamental fish in the aquarium. Moreover, since the water temperature can be freely set by operating the dial of the electric controller unit, it can be changed in a wide range depending on the type of the ornamental fish. Also, since the electric controller section and the mechanism section are separated by a cord, the electric controller section can be installed far away from the water tank, and water in the water tank may intrude to cause electric leakage or a temperature sensitive element. Is extremely safe with no abnormal operation, and no accidents that would kill the fish kept in the aquarium will occur. In addition, it is not necessary to crawl two or more cords in the aquarium, which not only improves the appearance and increases the commercial value, but it also eliminates the trouble in use due to the installation of the temperature sensing unit. Will be highly valuable.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic front view of a state of use, and FIG. 2 is a partially cutaway vertical sectional view in which a mechanical portion is enlarged. 1 is a heater, 2 is an electric controller, 3 is a cord,
5 is a mechanism part, 7 is a partition wall, 8 is a temperature detecting part, 9 is a heat generating part,
12 is a heater wire.

Claims (1)

[Scope of utility model registration request] 1. A two-cord cable is extended from an electric controller section having a dial for setting the temperature inside a water tank, and one cord is equipped with a power plug at its tip and the other cord is provided with a mechanism. The mechanical part is provided with a heat-insulating partition wall in the middle of the cylindrical outer shell to form a temperature detecting part having a temperature sensitive element and a heat generating part having a heater wire in the length direction of the outer shell. In addition to partitioning and forming adjacent to each other, the cords of the electric controller section and the mechanism section are made into four core wires, and the two electric wires connect the electric controller section and the temperature sensing element of the temperature detection section, and The heater for ornamental fish tank, wherein the two core wires are passed through the partition wall to connect the electric controller section and the heater wire of the heat generating section.