JP3772346B2 - Water tank heater for viewing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an appreciation water tank heating device for raising appreciation fish and aquatic plants.
[0002]
[Problems to be solved by the invention]
When growing appreciation fish or aquatic plants in the aquarium, they have the optimal growth temperature and are sensitive to temperature changes. . In addition, when there is a bottom floor made of soil or the like for planting aquatic plants in the water tank, a heater that heats the bottom floor itself is desirable to improve the growth of aquatic plants.
[0003]
20 and 21 show an example of a conventional water tank for viewing. A bottom floor 102 made of soil or the like is provided at the bottom of the water tank 101, and an electric heater 103 is provided in the bottom floor 102. A temperature sensor 104 is built in, a water temperature sensor 105 is further provided, the electric heater 103 and the control device 106 are connected by a power line 103A, and electric power is supplied to the electric heater 103 by a household power source or the like. The inside of the water tank 101 is heated by the control device 106 controlled by the detected water temperature.
[0004]
However, in the above heating device, in order to draw the power line 103A into the water, it is necessary to perform a strict waterproofing process on the power line 103A. As a result, the power line 103A becomes thick, and the scenery in the water tank 101 is obstructed. Further, when the tubular electric heater 103 as described above is used as a heat source, heat does not diffuse inside the bottom floor 102, and the temperature sensor 104 near the electric heater 103 is good because only the ambient temperature rises immediately. Temperature control cannot be performed.
[0005]
In order to improve this, as shown in FIGS. 22 and 23, the cord heater 111 is placed on the bottom of the water tank 101 using the suction cup 112, and a step-down device 113 is provided between the cord heater 111 and the commercial power source. Some heaters 111 are heated by applying a voltage obtained by stepping down a commercial power supply, but the installation is complicated and hinders replacement of the bottom floor material.
[0006]
In addition, it is conceivable to use a planar heater that uniformly heats the bottom surface and back surface from the outside of the water tank. However, in this case, the accuracy of temperature control cannot be increased, and heat is dissipated to the surroundings. The efficiency is low.
[0007]
By the way, in the water tank 101 as described above, in order to keep the water temperature at a predetermined temperature, a cooling fan for cooling the water may be provided together with the heaters 103 and 111 for heating the water. Conventionally, since the heaters 103 and 111 and the cooling fan are independent from each other, there are the following problems. First, a controller and a power supply are required individually, and a backup power supply in the event of a power failure is required. Moreover, the temperature setting must be performed individually, which is complicated. In addition, individual temperature sensors are required. For these reasons, the necessary cost increases, and further, commercially available cooling fans generally do not have a temperature control function in order to realize a low price. Further, when a plurality of heaters If, limited power consumption for driving becomes large, the allowable power at the same time, the number that can be used is limited.
[0008]
Therefore, an object of the present invention is to provide an appreciation water tank heating device that can heat a wide range of surfaces without having to draw a power line into water.
[0009]
[Means for Solving the Problems]
According to the water tank heating device for appreciation of claim 1 of the present invention , the metal body in the water tank is heated from the outside through the water by heating means provided below the water tank and provided on the stage on which the water tank is placed. A power line to be drawn in becomes unnecessary, and a wide range can be heated by the surface of the metal body provided in the water tank whose bottom and side surfaces are formed of glass .
[0010]
According to the water tank heating device for appreciation of claim 2 of the present invention, the distance between the metal body and the outside can be provided by the spacer.
[0011]
According to the water tank heater for appreciation of claim 3 of the present invention, convection of water between the metal body and the water tank can be promoted by the passage, and uniform heating can be achieved by this water convection.
[0012]
According to the water tank heating device for viewing according to claim 4 of the present invention, the water heated below the metal body moves upward along the inclination of the metal body, and promotes convection of water below the metal body. Can do.
[0013]
According to the water tank heating device for viewing according to claim 5 of the present invention , heating does not occur in the slit portion. Therefore, the metal body is efficiently heated by the heating means by removing the facing position of the heating means and providing the slit. be able to.
[0014]
According to the water tank heating apparatus for appreciation of claim 6 of the present invention, it is possible to prevent the bottom floor material and the like from falling from above the metal body when the bottom floor material is caught in the slit.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, 1st Embodiment of the cooking device in this invention is described, referring FIGS. In addition, the heating apparatus of this example is a bottom heating type of a water tank.
[0016]
In FIG. 1, 1 is a water tank, and this water tank 1 has a bottom glass 2 as a bottom surface, and side glass 3 which is a side surface is erected on four sides of the bottom glass 2 to form a box shape with an open top. . 4 is a table of the water tank 1, a cushion material 5 is disposed on the table 4, and the bottom surface of the water tank 1 is placed on the cushion material 5. In addition, the stand 4 has a hollow shape having wall portions in four directions, and the upper portion is closed by the stand top plate 4A to form a case shape.
[0017]
A metal plate 6, which is a magnetic metal body, is disposed at the bottom of the water tank 1, and the metal plate 6 has legs 7, 7 on both sides in the length direction, and a spacer 8 on the lower surface of the center. A gap 9 is provided between the lower surface of the metal plate 6 and the bottom glass 2. The spacer 8 is made of a nonmagnetic material. Then, a bottom floor 10 is provided on the metal plate 6 by spreading a bottom floor material of about 3 to 5 cm. Gravel or soil is used as the bottom floor material. Water W is injected into the water tank 1, and a temperature sensor 11 for measuring the water temperature is disposed in the upper water of the water tank 1. A temperature sensor 11 that measures the temperature of the metal plate 6 is disposed in contact with the metal plate 6.
[0018]
A heating coil 21 serving as a heating means is provided outside the bottom surface of the water tank 1, and the heating coil 21 is disposed below the bottom glass 2 so as to correspond to the metal plate 6 and accommodated in the table 4. A control device 22 for supplying a high-frequency current to the heating coil 21 is housed in the table 4. As shown in the block diagram of FIG. 6, the control device 22 includes an inverter control circuit 23 configured by a microcomputer or the like. The inverter control circuit 23 receives signals from the temperature sensors 11 and 12, and drives the drive. The circuit 24 is controlled, the inverter circuit 25 is driven by the drive circuit 24, and a high-frequency current is passed through the heating coil 21 by the inverter circuit 25. The inverter circuit 25 is connected to a household power supply via a rectifier circuit 26. Further, the control device 22 is provided with an operation switch 27 and a display unit 28 composed of an LCD, etc., and the operation switch 27 is operated to set the water temperature in the water tank 1, adjust the output of the heating coil 21, etc. The heating operation by the plate 6 can be set, and the operation state of the apparatus can be displayed by the display unit 28. The operation switch 27 and the display unit 28 are exposed on the side surface of the base 4, It can be provided outside the control device via a cord or the like. In addition, it is provided with a notification buzzer 29 which is a notification unit for notifying the operation state of the control device 22, and the control device 22 can be provided with an optional timer switch 30, which sets the operation of the heating device as a timer. can do. The inverter control circuit 23 drives and controls the cooling fan 51. The cooling fan 51 blows air to the water surface to lower the water temperature.
[0019]
Further, as shown in the plan view of FIG. 3, the metal plate 6 has an area of one half or more of the plane cross section of the water tank 1, and the heating coil 21 is arranged corresponding to the center of the metal plate 6. ing.
[0020]
Then, an alternating magnetic field is generated by passing a high-frequency current through the heating coil 21 under the control of the control device 22, and the magnetic flux passes through the top plate 4A, the cushion material 5 and the bottom glass 2 to reach the metal plate 6, and the metal An eddy current is generated in the plate 6, and the metal plate 6 generates heat by Joule heat and heats the surroundings. Further, the control device 22 controls the heating by the metal plate 6 so as to obtain an optimum temperature for the appreciation fish and aquatic plants based on the detection signals of the temperature sensors 11 and 12, for example, 25 ° C. is set as the optimum set temperature. And since the temperature sensor 12 is provided along the metal plate 6, the abnormal temperature of the metal plate 6 can be detected and it can prevent that aquatic plants etc. overheat.
[0021]
As described above, in this embodiment, the metal plate 6 that is a magnetic metal body provided on the bottom of the viewing water tank 1 formed of the bottom glass 2 and the side glass 3 whose bottom and side surfaces are glass and the water tank 1 are mounted. And a heating coil 21 which is a heating means provided in the base 4 outside the water tank 1 below the water tank 1 and a control device 22 for applying a high frequency current to the heating coil 21 . Since the metal plate 6 is induction-heated by the magnetic lines generated from the heating coil 21 provided on the table 4 on which the water tank 1 is placed, there is no need for a power line to be drawn from the outside through the water to the bottom, and the bottom glass 2 and side portions the surface of the metal plate 6 provided in the water tank 1 formed of glass 3, it is possible to heat the wide range.
[0022]
Further, in this embodiment, since the heating coil 21 and the control device 22 are arranged inside the base 4 of the water tank 1, the heating coil 21 and the control device 22 are heated in the water tank 1 without being exposed to the outside. The coil 21 and the control device 22 can be incorporated in a compact manner.
[0023]
Further, in this embodiment, since the nonmagnetic spacer 8 is provided below the metal plate 6, the spacer 8 is not induction-heated by the heating coil 21, and the bottom glass 2 on the bottom of the water tank against which the spacer 8 hits. Is not heated locally.
[0024]
Further, in this embodiment, since the gap 9 serving as the water passage is formed between the metal plate 6 and the bottom glass 2 on the bottom surface of the water tank 1, the gap 9 causes the gap between the metal plate 6 and the water tank bottom surface. Water convection can be promoted, and uniform heating can be achieved by this water convection. The gap 9 is a passage.
[0025]
FIG. 7 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and the detailed description thereof is omitted. The heating coil 21A in this example includes a wire 211. There is wound in a plane vertically and horizontally, is substantially equal to the distance H of the wire 211 adjacent.
[0026]
As described above, in the present embodiment, the heating coil 21A serving as a heating means has the wire 211 arranged at equal intervals, which is a predetermined interval, so that the magnetic flux density by the heating coil 21A can be made uniform, and uniform heating by the metal plate 6 is performed. Is possible.
[0027]
FIGS. 8-10 shows 3rd Embodiment of this invention, attaches | subjects the same code | symbol to the same part as said each embodiment, and omits the detailed description, and when it explains in full detail, the metal plate 6 of this example is the following. The leg 7 and the spacer 8 are formed corresponding to the inclination so that one side in the width direction is low and the other side is high. Therefore, when the water heated below the metal plate 6 rises, the metal plate 6 can smoothly flow upward as indicated by the arrow Y in FIG.
[0028]
Further, the metal plate 6 is formed with slits 31, 31A, 31B, 31C that are substantially radially directed from the center, and these slits 31, 31A, 31B, 31C are formed concentrically in a line. The heating coil 21B, which is a heating means, has a wire 211 wound around the position where the slits 31, 31A, 31B, 31C are removed, and is approximately between the slits 31, 31A and between the slits 31A, 31B from the center side. Correspondingly formed. Therefore, there is no slit in the portion of the metal plate 6 corresponding to the heating coil 21B.
[0029]
Thus, in this embodiment, there exists an effect | action and effect similar to said each embodiment.
[0030]
Further, in this embodiment, since the metal plate 6 has an inclination, the water heated below the metal plate 6 moves upward along the inclination of the metal plate 6, and the water below the metal plate 6. Can promote convection.
[0031]
In this embodiment, the metal plate 7 is provided with a plurality of slits 31, 31A, 31B by removing the facing position of the heating coil 21B. Thus, the facing position of the heating coil 21B is removed and the slit is removed. By providing 31, 31A, 31B, induction heating of the metal plate 6 by the heating coil 21B can be performed efficiently. In addition, water can pass through the slits 31, 31A, 31B, and 31C, and convection of water during heating is performed smoothly.
[0032]
Moreover, in this embodiment, since the slits 31, 31A, 31B, 31C have such a shape that prevents the bottom floor material in the water tank 1 from slipping down, the bottom floor material is slits 31, 31A, 31B, 31C. It is possible to prevent the bottom floor material from sliding off from the metal plate by being caught on the metal plate.
[0033]
FIGS. 11-16 shows 4th Embodiment of this invention, attaches | subjects the same code | symbol to the same part as said each embodiment, abbreviate | omits the detailed description, and the heating apparatus of this example is metal A side wall mounting type in which the plate 6 and the heating coil 21 are integrated. Then, an inner case 36 for storing the metal plate 6 and an outer case 37 for storing the heating coil 21 are formed, and these cases 36 and 37 are connected by a locking arm 38 serving as a distance holding means. The inner case 36 is disposed on the inner side of the side glass 3 in this locked state, and the outer case 37 is disposed on the outer side of the side glass 3. Placed in. The cases 36 and 37 and the locking arm 38 are made of a nonmagnetic material.
[0034]
Therefore, by hooking the locking arm 38 on the upper edge of the side glass 3, the apparatus can be easily set in the water tank 1, and through the side glass 3 by the lines of magnetic force (see FIG. 16) emitted from the heating coil 21. The metal plate 6 in the inner case 36 can be induction-heated.
[0035]
As described above, in the present embodiment, the gap holding means for holding the gap between the metal plate 6 and the heating coil 21 is provided, and the gap holding means is provided with a locking arm 38 that is a locking portion that is locked to the side glass 3 that is a wall. Therefore, the metal plate 6 and the heating coil 21 can be easily attached to the water tank 1.
[0036]
17 to 19 show a fifth embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-mentioned embodiments, and detailed description thereof will be omitted. In this example, the bottom heating type is shown. These heating devices, the side wall mounting type heating device shown in the fourth embodiment, and the cooling fan 51 are combined, and control means 22A for controlling them is provided. Further, a temperature sensor 11 for measuring the water temperature, a temperature sensor 12 for measuring the temperature of the metal plate 6 at the bottom, and a temperature sensor 12A for measuring the temperature of the metal plate 6 in the inner case 36 are provided. Is provided in contact with the metal plate 6.
[0037]
As shown in the block diagram of FIG. 19, the control device 22A includes an inverter control circuit 23 constituted by a microcomputer or the like, as in FIG. 6, and the inverter control circuit 23 includes the temperature sensors 11 , 12 , 12A. The drive circuits 24 and 24A are controlled, the inverter circuits 25 and 25A are driven by the drive circuits 24 and 24A, and the heating coil 21 at the bottom and the side heating are driven by the inverter circuits 25 and 25A. A high frequency current is passed through the coil 21. Further, a household power source or the like is connected to the inverter circuits 25 and 25A via a rectifier circuit 26. The inverter control circuit 23 controls the driving of the cooling fan 51. The cooling fan 51 blows air to the water surface to lower the water temperature. Further, the control device 22A includes an element cooling fan 39 for cooling the switch elements of the drive circuits 24, 24A.
[0038]
After the power is turned on, the water temperature is set to 25 ° C., for example, by the display unit 28 and the operation switch 27. Based on this setting, the control device 22A controls the heating, and by induction heating, the bottom metal plate 6 and the side metal plate 6 are heated and controlled so that the temperature detected by the temperature sensor 11 becomes the set temperature. The metal plate 6 is heated and controlled so that the detected temperature of the temperature sensor 11 for measuring the water temperature becomes the installation temperature, and the bottom metal plate 6 is heated so that the detected temperature of the temperature sensor 12A is about 2 ° C. higher than the set temperature. Be controlled. When the water temperature becomes higher by about 2 ° C. than the set temperature by the temperature detected by the temperature sensor 11, the cooling fan 51 is driven by the control of the control device 22A, and functions to lower the water temperature by blowing air to the water surface. Further, at the timing at which the bottom metal plate 6 and the side metal plate 6 operate simultaneously, the control device 22A performs an alternate operation in units of, for example, several tens of ms to several seconds, and the maximum value of power is one metal plate 6. It can be made the same as in the case of single operation by heating.
[0039]
Thus, in this embodiment, there exists an effect | action and effect similar to said each embodiment.
[0040]
As described above, in this embodiment, the cooling fan 51 serving as a blowing means for blowing air to the water surface of the water tank 1 is provided, and the control device 22A performs high-frequency current control of the heating coils 21 and 21, and the water temperature is higher than the set temperature. In addition, since the cooling fan 51 is controlled to be driven, effective temperature control can be performed by the plurality of metal plates 6 and 6 and the cooling fan 51, and since the control device 22A is used in common, the device is low. Power consumption can be reduced by cost.
[0041]
In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, the metal plate and the heating coil shown in each embodiment can be used in appropriate combination. In addition, the water tank is not limited to a box shape, and various kinds of water tanks can be used.
[0042]
【The invention's effect】
According to the appreciation water tank heating device of claim 1 of the present invention, it is not necessary to draw the power line into the water, and a wide range of surfaces can be heated.
[0043]
According to the water tank heating device for appreciation of claim 2 of the present invention, the interval can be provided by the spacer.
[0044]
According to the water tank heater for appreciation of claim 3 of the present invention, convection of water between the metal body and the water tank can be promoted by the passage, and uniform heating can be achieved by this water convection.
[0045]
According to the water tank heating device for viewing according to claim 4 of the present invention, the water heated below the metal body moves upward along the inclination of the metal body, and promotes convection of water below the metal body. Can do.
[0046]
According to the water tank heating device for viewing according to claim 5 of the present invention, the metal body can be efficiently heated by the heating means.
[0047]
According to the water tank heating device for appreciation of claim 6 of the present invention, it is possible to prevent the bottom floor material and the like from falling from above the metal body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in the left-right direction of a water tank showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the water tank in the front-rear direction.
FIG. 3 is a plan view of the water tank.
4 is a plan view of the metal body. FIG.
FIG. 5 is a front view of the metal body.
FIG. 6 is a block diagram of the heating device.
FIG. 7 is a plan view of heating means showing a second embodiment of the present invention.
FIGS. 8A and 8B are plan views of a metal body and a heating unit according to a third embodiment of the present invention, in which FIG. 8A shows the metal body and FIG. 8B shows the heating unit.
FIG. 9 is a front view of the metal body.
FIG. 10 is a side view of the metal body.
FIG. 11 is a cross-sectional view in the left-right direction of a water tank showing a fourth embodiment of the present invention.
FIG. 12 is a cross-sectional view of the water tank in the front-rear direction.
FIG. 13 is a perspective view of the inner case and the outer case integrated by the interval holding means.
FIG. 14 shows the metal body, FIG. 14 (A) is a front view, and FIG. 14 (B) is a side view.
15 shows the heating means, and FIG. 15 (A) is a front view and FIG. 15 (B) is a side view.
FIG. 16 is an explanatory cross-sectional view for explaining induction heating between the heating means and the metal body.
FIG. 17 is a cross-sectional view in the left-right direction of a water tank showing a fifth embodiment of the present invention.
FIG. 18 is a cross-sectional view of the water tank in the front-rear direction.
FIG. 19 is a block diagram of the heating device.
FIG. 20 is a cross-sectional view in the left-right direction of a water tank showing a conventional example.
FIG. 21 is a cross-sectional view of the water tank in the front-rear direction.
FIG. 22 is a cross-sectional view in the left-right direction of a water tank showing another conventional example.
FIG. 23 is a cross-sectional view of the water tank in the front-rear direction.
[Explanation of symbols]
1 Water tank 2 Bottom glass ( glass )
3 Side glass ( glass )
4 units 6 Metal plate (metal body)
8 Spacer 9 Clearance (water passage / passage)
10 Bottom floor (bottom floor material)
21 Heating coil (heating means)
22 Control device
21A Heating coil (heating means)
31, 31A, 31B, 31C Slit

Claims (6)

The bottom and side surfaces has a metal body provided in the water tank for appreciation which is made of glass, and the base for mounting the water tank, heating means provided in said platform and disposed below the water tub, and a control device, wherein A water tank heating apparatus for viewing, wherein the metal body is heated by a heating means. 2. The appreciation water tank heating device according to claim 1, wherein a spacer is provided on the metal body . 3. A viewing water tank heating apparatus according to claim 2 , wherein a passage is formed between the metal body and the water tank . The water tank heating apparatus for appreciation according to claim 2, wherein the metal body has an inclination . The applicator water tank heating device according to any one of claims 1 to 4, wherein the metal body is provided with a slit by removing a position opposite to the heating means . 6. The appreciation water tank heating apparatus according to claim 5 , wherein the slit is shaped to prevent the bottom floor material in the water tank from falling .

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