KR100343420B1 - Hot Liquid Circulation System - Google Patents

Abstract

Reduces the piping of suction pipes, and preferably utilizes the heat radiating energy of solid state switches such as electric motors and triacs for the warming function of liquids to improve the power efficiency of solid state switches such as triacs. Delete the coolant.

The inlet port 11 of the electric pump 10 and the tank outlet 21 below the reservoir tank 20 are directly connected. In addition, a part of the casing 12 of the electric pump 10 and a wall surface 23 of the part of the reservoir tank 20 are shared to integrate the casing 12 and the reservoir tank 20.

This is formed using a material having high thermal conductivity, such as bronze. The heater 31 in the shape of a face is attached to the outer wall of the reservoir tank 20, and the triac 34 and thermistor 35 are attached to the outer wall of the casing 12.

Triacs without electric motors and coolants cool well even if the liquid is warm.

Description

Warm Liquid Circulation System

The present invention relates to a warm liquid circulator for circulating a warm liquid such as water or antifreeze or oil heated by squeezing an electric pump and a heater to a liquid heat dissipation resistance such as tatami heating.

4 and 5 show a conventional example.

In Fig. 4, the reserve tank 52 is separately provided near the electric pump 51, and the suction port 53 of the electric pump 51 and the tank outlet 54 below the reservoir tank 52 are connected to the suction pipe 55. The liquid supply opening 57 which can be opened and closed by a cap 56 is provided above the reservoir tank 52.

An inlet joint 60 is provided via a pipe 59 upstream of the tank inlet 58 of the reserve tank 52. An outlet joint 63 is provided downstream of the discharge port of the electric pump 51 via a pipe 62.

The reserve tank 52 is introduced with a sheath (external sheath cable) heater via the terminal 64, and a float switch (not shown) is introduced via the terminal 66.

Inlet seam 60 is fitted with a thermistor 67 which measures the temperature of the liquid. The casing of the electric pump 51 is preferably a synthetic resin having a poor thermal conductivity.

A liquid radiating resistance, such as external tatami heating, is connected to the outlet joint 63 and the inlet joint 60, and the warm liquid circulation device and the external liquid radiating resistance form a waste flow path.

Fig. 5 shows a part of the printed board in the control panel not shown in the apparatus of Fig. 4, where the triac 74 is in close contact with the cooling body 73 having a plurality of pins 72 attached to the printed board 71, the triac 74 being the thermistor 67; The current of the sheath heater 65 is turned on / off based on the temperature measurement.

Fig. 5 shows a part of the printed board in the control panel not shown in the apparatus of Fig. 4, where the triac 74 is in close contact with the cooling body 73 having a plurality of pins 72 attached to the printed board 71, and the triac 74 According to the thermometer reading, the current of the sheath heater 65 is turned on / off. For example, when the triac 74 has a current capacity of 16A, the value of the cooling body 73 including the pin 72 is about 150x120x30mm.

Describe the function of the reserve tank.

Both the warm liquid circulation device and the external liquid heat dissipation resistance are connected to the external liquid heat dissipation resistance at the site between the two joints 60 and 63 while the liquid is air (air). The liquid is supplied from the liquid supply port 57 of the reserve tank 52 while the pump 51 is operated.

Since it is not desirable to make the capacity of the reserve tank 52 too large in terms of thermal substitution efficiency, it is common to repeat the replenishment of the liquid several times until it is filled with a large volume of external liquid heat resistance.

When the liquid returns to the reserve tank 52 and becomes full through the inlet joint 60 at the external liquid heat dissipation resistance, the filling is completed and the cap 56 of the liquid supply port 57 is closed. Since the reserve tank 52 is located at the suction side of the pump 51, it is possible to fill the vane with liquid during liquid replenishment, thereby generating the performance of the original pressure and flow rate of the pump 51.

When the liquid supply is complete and dissolved in the air or liquid remaining in the warm liquid circulation device or the liquid heat dissipation resistance during use, even though the separated air returns to the reservoir tank 52, the reservoir blank 52 functions as gas-liquid separation. The original performance of the pump 51 is maintained.

According to the conventional example, since there is a reserve tank, the warm liquid circulating device and the liquid heat dissipation resistance can be carried in the liquid as it is, and the performance of the pump is maintained by the action of gas-liquid separation even during use. However, the suction pipe requires piping.

In addition, a part of the heat energy generated by the electric motor of the pump 51 is transmitted to the casing of the pump 51, but the placenta is dissipated in the atmosphere, which causes a large heat loss. In particular, the heat radiation energy of the triac 74 does not contribute to improving the thermal substitution efficiency since it is not used for heating the warm liquid of the warm liquid circulation device. In addition, there is a problem that the cooling body 73 of the triac 74 is also large, the parts score is increased, and the manufacturing and installation work is complicated.

The same applies to the use of solid state switches such as thyristors instead of triacs.

A first object of the present invention is to provide a warm liquid circulator that can omit the suction pipe and can facilitate the manufacturing and installation work by reducing the number of parts.

A second object of the present invention is to provide a warm liquid circulation device that can improve the power efficiency of the device by effectively utilizing the heat radiation energy of the electric motor of the electric pump to the warming function of the liquid in addition to the first object.

The third object of the present invention, in addition to the first or second purpose, by effectively utilizing the heat radiation energy of the solid state switch such as triacs for the warming function of the liquid to improve the power efficiency of the device to improve the heat radiation energy of the solid state switch The present invention provides a warming liquid circulator that can effectively utilize the liquid warming function to improve the power efficiency of a device to eliminate the cooling body of a contactless switch.

The warm liquid circulator of the invention according to claim 1 connects the inlet side of the pump with the tank outlet below the reservoir tank, provides an openable liquid supply port in the reservoir tank, and the inlet joint upstream of the tank inlet of the reservoir tank. In a warm liquid circulation device that provides a heater for heating a liquid in a flow path leading to an outlet joint downstream of a pump discharge port via a reservoir tank, the inlet port of the pump and the tank outlet are directly connected.

In the warm liquid circulator of the invention of claim 2, in the invention of claim 1, a part of the casing of the pump shares a wall of a part of the reservoir tank to integrate the casing and the reservoir tank.

In the warm liquid circulator of the invention of claim 3, in the invention of claim 2, the casing and the reserve tank are integrated by a mold.

In the warm-liquid circulator of the invention according to claim 4, in the invention according to claim 2, the casing and the reserve tank are each formed by different molding dies, and then joined together and integrated.

In the invention according to claim 5, the warm-liquid circulation device of the invention described in claim 5 is an integral part of the inlet seam connected to the reserve tank and the outlet seam adjacent to the casing.

The warm-liquid circulator of the invention of claim 6 is the invention of claim 1, wherein the heater is attached to an outer wall of a casing or reservoir tank made of a material having high thermal conductivity.

In the warm-liquid circulator of the invention according to claim 7, in the invention according to claim 6, the heat dissipation fin is provided on the inner wall of the casing or the reserve tank corresponding to the heater.

In the warm-liquid circulator of the invention of claim 8, in the invention of claim 6 or 7, the heater is provided on the lower outer peripheral surface of the casing or the reserve tank.

In the invention according to claim 9, the warm liquid circulator of the invention according to claim 9 is a material having a high thermal conductivity degree in the flow path from the inlet joint to the outlet joint according to the invention according to claim 1, 2, 3 or 4. It is attached to the outer wall surface.

The warm-liquid circulator of the invention of claim 10 is the invention of claim 9, wherein the contactless switch is provided on the lower outer wall of the casing or the reserve tank.

In the invention according to claim 11, the warm-liquid circulation device of the invention described in claim 11 is to attach a contactless switch to the outer wall of a casing or reservoir tank made of a material having high heat conductivity.

1-A cross-sectional view of one embodiment of the present invention.

2-a sectional view of another embodiment of the present invention.

3-a sectional view of another embodiment of the present invention.

4-a perspective view of a prior art example.

Figures 5-4 are cross-sectional views of the printed board used in Figure 4;

Explanation of the sign

10 ... Electric pump 11 ... Inlet 12 ... Casing 13 ... Outlet

14 ... Wheel wheel 20 ... Reservation tank 21 ... Tank exit 22 ... Tank entrance

23 Wall 24 Inlet joint 25 Outlet joint 26 Cap

27.Liquid supply port 29.Heating fin 31.Heater 34.Triac

An embodiment of the present invention will be described with reference to FIG.

In Fig. 1, the inlet 11 of the electric pump 10 and the tank outlet 21 below the reservoir tank 20 are directly connected, and a part of the casing 12 of the electric pump 10 shares the wall surface 23 of the part of the reservoir tank 20 so that the casing 12 and the reservoir are shared. Integrate tank 20.

It is formed of a material with high thermal conductivity, such as bronze, stainless steel or cast iron. In the case of cast iron, the casing 12 and the reserve tank 20 are integrated using a single mold. A casing 12, a reserve tank 20, an inlet joint 24, and an outlet joint 25 are integrated by adjoining the inlet joint 24 upstream of the tank inlet 22 of the reservoir tank 20 and adjoining the outlet joint 25 downstream of the discharge port 13 of the casing 12. A liquid supply opening 27 which can be opened and closed by a cap 26 is provided above the reservoir tank 20.

Introduce the full lot switch 28 to the cap 26. The heater 31 in the shape of a face is attached to the outer wall of the reservoir tank 20, and a heat dissipation fin 29 is provided on the corresponding inner surface. In addition, a thermostat 32 or a temperature fuse 33 is attached to the outer wall of the reserve tank 20, and a triac 34 and a thermistor 35 are attached to the outer wall of the casing 12.

A canned motor is used for the electric motor, and the inside of the can 42 inscribed in the stator 41 fixed to the stator frame 40 is filled with liquid. The shaft 44 fixing the rotor 43 arranged through the gap is supported by the traverse shafts 46a and 46b made of ceramic carbon attached to the brackets 45a and 45b. By opening one end of the hole 47 penetrating the shaft 44 to the suction side of the wing wheel 14, the liquid is divided into the gap of the traverse axis 46a, the gap of the outer circumference of the rotor 43, the gap of the traverse axis 46b and Return to the suction side via hole 47.

This flow lubricates the sliding surfaces of the traverse bearings 46a and 46b to cool the heat of the rotor 43. In the warm liquid circulation device, a liquid radiating resistance such as external tatami heating is connected to the outlet joint 25 and the inlet joint 24, and the warm liquid circulation device and the external liquid radiating resistance form a waste flow path.

The operation of the above embodiment will be described.

First, explain how the reserve tank works.

Both the warm liquid circulation system and the external liquid heat dissipation resistance are brought into the field with the liquid in air. At the site, the liquid radiating resistance is connected to the outlet seam 25 and the inlet seam 24. While operating the electric pump 10, liquid such as antifreeze is supplied from the liquid supply port 27 of the reserve tank 20.

As is well known, the pump does not perform at its original pressure and flow rate when the vane is a ball or a liquid mixed with air. However, since the reserve tank 20 is located on the suction side of the electric pump 10, it is possible to fill the vane 14 with liquid during liquid replenishment, thereby generating the original performance of the electric pump 10.

In addition, since the tank outlet 21 of the reservoir tank 20 and the inlet 11 of the casing 12 are directly connected to each other, there is no resistance to the suction pipe, so that the liquid supplied to the reservoir tank 20 immediately flows into the wing wheel 14, thereby quickly inherently performing the original performance of the electric pump 10. Generate.

In order to improve the heat transfer efficiency, the capacity of the reserve tank 20 is not set too large, so the liquid supply is repeated many times until it spreads throughout the flow path of the liquid heat dissipation resistance. At this time, since the liquid supplied to the reserve tank 20 does not have a suction pipe, the liquid flows into the wing wheel 14 immediately so that the replenishment of the liquid (cycle time) can be accelerated.

Then, when the liquid returns to the reservoir tank 20 through the inlet joint 24 from the external liquid heat dissipation resistance and becomes full, replenishment is completed and the cap 26 of the liquid supply port 27 is closed, and the warm liquid circulator can be operated at any time. When the liquid supply is completed and dissolved in the air or liquid remaining in the warm liquid circulator or liquid heat dissipation resistance during use, even if the separated air returns to the reservoir tank 20, the reservoir tank 20 functions as gas-liquid separation. The original performance of the electric pump 10 is maintained.

If the liquid level in the reserve tank 20 decreases due to prolonged use, the front switch 28 detects it before gas enters the electric pump 10 and prompts the liquid replenishment.

In the case of using the proswitch in place of the prosthete switch, it is possible to detect the flow rate of the liquid and to prevent boiling by abnormal heating in advance when the warm liquid circulating device liquid heat dissipation resistance and the connecting portion are not securely connected. In addition, a prot switch can also use a proswitch together.

Triac 34 turns the current of heater 31 on / off based on the thermometer reading of the thermistor 35's liquid. In addition, the triac 34 is attached to the outer wall of the casing 12. The heat radiation energy of the triac 34 conducts liquid through the wall of the casing 12 with high thermal conductivity, so that the triac 34 is cooled well and the power efficiency of the warm liquid circulator. To improve. This is because the operating temperature of the Triac 34 is sufficiently higher than the operating temperature of the warm liquid. Therefore, Triac 34 does not require a special coolant with fins.

The Thermostat 32 or Temperature Fuse 33 is a safeguard against elevated temperatures for the Triac 34. In the motor, the stator edge 40 is attached to a casing 12 formed of a material having high thermal conductivity, such as bronze, so that the heat radiation energy of the stator 41 is conducted to the liquid in the casing 12 through the stator edge 40 and the casing 12, thereby stator edge 40 and the stator. 41 cools well and improves the power efficiency of the warm liquid circulation system.

In addition, the liquid inside the can 42 is refluxed on the suction side by a hole 47 penetrating the shaft 44 to cool the heat of the rotor 43, thereby improving the power efficiency of the warm liquid circulation system.

The effect of the said embodiment is demonstrated.

(1) Since the reserve tank 20 is located at the suction side of the electric pump 10, both the warm liquid circulator and the external liquid heat dissipation resistance can be brought into the field in the air (air) state. A liquid heat resistance is connected to the inlet seam 22, whereby an antifreeze liquid can be supplied from the liquid supply port 27 of the reservoir tank 20.

(2) Furthermore, the tank outlet 21 of the reservoir tank 20 and the inlet 11 of the casing 12 are directly connected to each other, so there is no resistance of the suction pipe. Therefore, the liquid supplied to the reservoir tank 20 immediately flows into the wing wheel 14, thereby maintaining the original performance of the electric pump 10. Because of the effect of rapid generation, the replenishment of the liquid can be repeated quickly, the replenishment can be completed quickly, and the warm liquid circulator can be quickly operated in the field.

(3) Electric pump 10 by the action of gas-liquid separation of the reservoir tank 20 even if the warm liquid circulator is dissolved in the air or liquid remaining in the details during use for liquid heat dissipation resistance and the separated air returns to the reservoir tank 20 The inherent performance of is maintained so that the warm liquid circulator can be used for a long time. If the liquid level in the reserve tank 20 falls, the front switch 28 detects it before gas enters the electric pump 10, and prompts the liquid replenishment.

(4) The triac 34 that turns on / off the current of the heater 31 is attached to the outer wall of the casing 12, so that the triac 34 cools well in the liquid and improves the power efficiency of the warm liquid circulator. Has the effect of not requiring a special cooling body with fins.

(5) The stator frame 40 of the motor is attached to a casing 12 formed of a material with high thermal conductivity, such as bronze, so that the heat dissipation energy of the stator 41 is conducted to the liquid as described above to cool well and improve the power efficiency of the warm liquid circulation system. The heat of the rotor 43 is cooled by the hole 47 penetrating the shaft 44, thereby improving the power efficiency of the warm liquid circulator.

(6) Since the triac 34 is provided using an idle space below the bottom wall of the reservoir tank 20 with respect to the lower outer wall of the casing 12, the installation space can be reduced. For example, even if there is air accumulated in the reserve tank, the triac 34 is well cooled in the liquid, thereby improving the power efficiency of the warm liquid circulator.

The modification of the said embodiment is demonstrated.

Instead of integrally forming the casing 12 and the reservoir tank 20 with a material such as bronze having a high thermal conductivity, mass production is improved by forming a mold from a synthetic resin having a high thermal conductivity degree of air mixed with a suitable filter. At this time, the upper side of the reservoir tank 20 is opened with the heat dissipation fin 29 corresponding to the heater 31 of the reservoir tank 20 in the vertical direction, covered with a new cover with a cap 26, and the vortex chamber of the casing 12 is formed into a mold with a split side. The seam 25 or the inlet seam 24 may also be formed in a horizontal mold.

A part of the casing 12 of the electric pump 10 and a wall 23 of the part of the reservoir tank 20 are shared so that the inlet 11 and the tank outlet 21 are directly connected to integrate the casing 12 and the reservoir tank 20. The casing 12 and the reservoir tank 20 may be combined by directly connecting the inlet port 11 and the tank outlet 21 with a new screw or the like.

At this time, the outlet joint 21 is the casing 12 side, and the inlet joint 21 is the reserve tank 20 side.

As shown in Fig. 2, the casing 12 and the reservoir tank 20 having the inlet joint 24 and the outlet joint 25 are separately formed in different shapes, and they are joined via a sealing member, and may be clamped and fixed by bolts 48.

In the case of this separate example, the casing 12 and the reserve tank 20 can be easily produced in a desired shape by the resin molding mold.

As shown in Fig. 3, a casing 12 having an inlet joint 24 and an outlet joint 25 and a body 20a of the reserve tank 20 are integrally formed, and a cover plate 20b for closing the upper opening is formed separately, and they are interposed between the seal members. Can be fixed by tightening with bolt 48.

Also in this separate example, the casing 12 and the reserve tank 20 can be easily manufactured by the resin molding mold in a desired shape.

Although not shown, the heater 31 may be attached to the bottom outer surface of the reservoir tank 20. In this separate example, the heat dissipation fins 29 may be formed vertically.

In this separate case, heat transfer can be efficiently carried out by utilizing the property of rising thermal energy, and heater 31 can be mounted in a compact by using an idle space between the casing 12 and the reserve tank 20.

For example, even if there is accumulated air in the reserve tank, the heater 31 can efficiently heat exchange, thereby improving the power efficiency of the warm liquid circulation system.

The heater 31, thermostat 32, temperature fuse 33, triac 34, thermistor 35, etc. may be attached to any part of the outer wall surface made of a material having high thermal conductivity in the flow path from the inlet joint 22 to the outlet joint 21. A sheath heater can be used instead of 31. A solid state switch such as a thyristor may be used in place of the triac 34, and a solid state switch may not be attached to the casing 12 or the reserve tank 20.

The electric pump 10 may be mutually axis | shaft with the suction side facing up, and a pump other than a vortex type may be sufficient. In addition to the canned motor, a known mechanical seal or a magnet coupling may be used for the electric motor.

Next, technical thoughts other than the claim grasped | ascertained by the said embodiment are enumerated below. In addition, the following technical ideas 1-4 are all in the form of not citing Claims 1, 2 or 3.

(Technology 1) The inlet side of the pump and the tank outlet below the reservoir tank are connected, and a liquid supply port that can be opened and closed in the reservoir tank is provided, and the pump is connected via the reservoir tank from an inlet joint upstream of the tank inlet of the reservoir tank. A warm liquid circulator for providing a heater for heating a liquid in a flow path leading to an outlet joint downstream of a discharge port of the discharge port, wherein the heater is attached to an outer wall of a casing or a reservoir tank made of a material having high thermal conductivity. Circulator.

In this technical idea 1, there is an effect that the water resistance of the heater may not be considered. In this case, when the casing is made of a material having high thermal conductivity, the thermal energy emitted from the electric motor is conducted to the liquid and cooled well, and the power efficiency of the warm liquid circulator is improved.

(Technology 2) In the warm-liquid circulation device described in the technical idea 1, a solid state switch for turning on / off a heater is attached to an outer wall surface made of a material having a high thermal conductivity degree of a flow path from an inlet joint to an outlet joint. Warming liquid circulator.

In this technical idea 2, in addition to the effect of technical idea 1, the heat energy emitted from the contactless switch is well conducted to the liquid and cooled, improving the power efficiency of the warm liquid circulation system. It does not require the effect.

(Technology 3) The inlet side of the pump and the tank outlet below the reservoir tank are connected, and a liquid supply port that can be opened and closed is provided in the reservoir tank, and the pump is connected to the reservoir tank from the inlet joint upstream of the tank inlet via the reservoir tank. In a warm liquid circulation system providing a heater for heating a liquid in a flow path leading to an outlet joint downstream of a discharge port, the contactless switch for turning on / off the heater is made of a material having a high thermal conductivity of the flow path from the inlet joint to the outlet joint. A warm liquid circulation device, characterized in that attached to the outer wall surface.

In this technical idea 3, the heat energy emitted from the contactless switch is well conducted by the liquid to cool down, improves the power efficiency of the warm liquid circulation system, and does not require a special cooling body in the contactless switch. have.

(Technical idea 4) The warm liquid circulation device according to the technical idea 3, wherein the solid state switch is attached to an outer wall of a casing or a reserve tank made of a material having high thermal conductivity.

In this technical idea 4, the technical idea 3 has an effect of increasing the degree of freedom of attachment by attaching a contactless switch to the outer wall of a casing or reserve tank having a relatively large surface area.

According to the warm liquid circulator of the invention of claim 1, the suction pipe is directly connected by connecting the suction port and the tank outlet of the pump, thereby reducing the number of parts and eliminating the piping work. The replenished liquid immediately flows into the pump to complete the replenishment of the liquid quickly, and the warm liquid circulator can be quickly operated.

According to the warm-liquid circulation device of the invention of claim 2, in addition to the effect of the invention of claim 1, the casing and the reserve tank are integrated to reduce the number of parts so that the inlet of the pump eliminates the direct connection of the tank outlet. According to the warm liquid circulator of the invention of claim 3, in addition to the effect of the invention of claim 2, the number of parts can be reduced to facilitate the manufacturing and dispatching.

According to the warm liquid circulator of the invention of claim 4, in addition to the effect of the invention of claim 2, the casing and the reserve tank can be easily formed by the resin material in addition to the metal material.

According to the warm liquid circulator of the invention of claim 5, in addition to the effect of the invention of claim 1 or 2, the inlet joint is integrated into the reservoir tank and the outlet joint is adjacent to the casing, respectively, so that the parts score is further reduced to simplify the structure. There is an effect that the production can be facilitated.

According to the warm liquid circulator of the invention of claim 6, in addition to the effects of the invention of claims 1, 2 or 3, the heater is attached to the outer wall of the casing or the reserve tank, so that the water resistance of the heater is not considered.

In this case, when the material having a high thermal conductivity is used as a casing, the heat energy emitted from the electric motor is conducted to the liquid, thereby cooling well and improving the power effect of the warm liquid circulator.

According to the warm liquid circulator of the invention of claim 7, in addition to the effect of the invention of claim 6, the heating efficiency of the liquid by the heater can be improved.

According to the warm-liquid circulator of the invention described in claim 8, in addition to the effect of the invention described in claim 6 or 7, the heater can be attached by using the recessed space between the casing and the reservoir tank, so that the miniaturization can be achieved. At the same time, even if there is accumulated air in the reservoir tank, the heater can efficiently heat exchange, thereby improving the heating efficiency of the liquid.

According to the warm liquid circulator of the invention of claim 9, in addition to the effects of the invention of claims 1, 2, 3 or 4, the thermal energy emitted from the contactless switch is well conducted to the liquid and cooled, and power is supplied to the warm liquid circulator. It has the effect of improving the efficiency, which does not require a special cooling body in the solid state switch.

According to the warm-liquid circulator of the invention of claim 10, in addition to the effect of the invention of claim 9, the contactless switch can be attached using the recessed space of the junction between the casing and the reserve tank, thereby miniaturizing it.

For example, even if there is accumulated air in the reserve tank, the contactless switch is well cooled in the liquid, thereby improving the power efficiency of the warm liquid circulation system.

According to the warm liquid circulator of the invention of claim 11, in addition to the effect of the invention of claim 5, the degree of freedom of attachment is increased by attaching the contactless switch to the outer wall of a casing or reservoir tank having a relatively large surface area.

Claims (11)

The inlet side of the pump and the tank outlet at the bottom of the reservoir tank are connected, and a liquid supply port which can be opened and closed is provided in the reservoir tank, and is downstream of the discharge port of the pump via the reservoir tank from an inlet joint upstream of the tank inlet of the reservoir tank. A warm liquid circulator that provides a heater for heating a liquid in a flow path leading to an outlet joint, wherein the warm liquid circulator is connected directly to the inlet of the pump and the outlet of the tank. A warming liquid circulating device according to claim 1, wherein the casing and the reserve tank are integrated by sharing a wall of a part of the casing with a part of the reservoir tank. The warming liquid circulating device according to claim 2, wherein the casing and the reservoir tank are integrated by a mold. A warming liquid circulating device according to claim 2, wherein the casing and the reserve tank are each formed by a different molding type, and are then joined and integrated with each other. The warming liquid circulator of any one of claims 1-4, wherein the inlet joint is integrated into the reservoir tank by adjoining the outlet joint to the casing, respectively. A warming liquid circulator according to any one of claims 1 to 4, wherein the heater is attached to an outer wall of a casing or a reserve tank made of a material having high thermal conductivity. The warm liquid circulation device according to claim 6, wherein the inner wall of the casing or the reserve tank is provided with a heat dissipation fin (Fin arm) corresponding to the heater. The warming liquid circulating device according to claim 6, wherein the heater is provided on a lower outer peripheral surface of the casing or the reserve tank. In the warm-liquid circulation apparatus as described in any one of Claims 1-4, the solid-state switch which turns on / off a heater is attached to the outer wall surface of the material with high thermal conductivity degree of the flow path from an inlet joint to an outlet joint. Warming liquid circulator. A warming liquid circulating device according to claim 9, wherein the solid-state switch is provided on the lower outer wall of the casing or the reserve tank. A warming liquid circulating device according to claim 9, wherein the contactless switch is attached to an outer wall of a casing or a reserve tank made of a material having a high thermal conductivity.