JPS61184357A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger which may not affect a bad influence over a heater and a circulation pump but may show a fast rising in operation by a method wherein the heater is arranged at a suction port side of the circulation pump and at the same time an intake port of thermal medium liquid for the heater is arranged over the heater. CONSTITUTION:Thermal medium liquid heated by an electric heater 32 is ascended up to the lower surface of a partition wall 31 of a lower chamber 30B, a thermal distribution is distributed downwardly in sequence from a hot thermal medium liquid to a cold thermal medium liquid, the hot thermal medium liquid is sucked in sequency by the circulation pump 14 and then circulated in the circulation pipe line. In turn, the thermal medium liquid circulated in the circulation pipe line is flowed from the flow inlet 30a to the upper chamber 30A of the heater 10. The thermal medium liquid stored in the upper chamber 30A is stored, its flow speed is decreased, and as shown by an arrow A, the thermal medium liquid is flowed down gradually to the base part of the electric heater 32 through a communication hole 31a and then heated. The thermal medium liquid heated and ascended up to the lower surface of the partition wall of the lower chamber 30B heats the thermal medium liquid stored in the upper chamber 30A via partition wall 31, so that it is possible to prevent a useless discharging of heat.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a heat exchanger, and more particularly, to a heat exchanger that ensures fluidity of a heat transfer liquid at the beginning of use and has a quick start-up.

(Prior Art) The inventor of this invention has developed a heater 10 as shown in FIG.
．． A fluid with a high boiling point, a low melting point, a large viscosity, and a small specific heat, such as ethylene glycol, triethylene glycol, etc., is sealed as a heat medium liquid in a pipe line including a heat radiating part 12 and an expansion chamber 16 by a circulation pump 14, An intensely cycled heat exchanger was proposed. The heat medium liquid of this heat exchanger is
Since it has a high boiling point, it can be heated to a high temperature and is efficient, and because its specific heat is small, it rises quickly, but as the liquid temperature decreases, its viscosity increases and fluid resistance increases.

For this reason, in heat exchangers that use ethylene glycol, etc. as a heat medium, when the heat medium liquid is not being heated, the outside temperature drops, and the fluidity of the heat medium liquid becomes poor (after which the heat source is used). When the heat source is turned on, the circulation pump, which is generally driven at the same time as the heat source is turned on, may be overloaded and have an adverse effect.A circulation pump with a large discharge volume is required, but the circulation pump is not equipped with an overload protection circuit. In this case, only the heat transfer liquid in the heater is partially heated, and the heated heat transfer liquid does not flow in the circulation pipe, so it does not cause any damage to the heater. Otherwise, a protective device such as a temperature fuse attached to the heater to prevent damage to the heater may be activated and stop the operation of the heat exchanger.

Therefore, the inventor of the present invention provided a preheating function that maintains the liquid temperature at a predetermined temperature, so that the fluidity of the heat transfer liquid is always maintained (this may cause harm to the heater or circulation pump at the beginning of toilet use). He devised an unprecedented heat exchanger and filed an application
-144634).

However, in this invention, a control circuit for controlling the preheating function and the reserve function is added to the conventional heat exchanger.
The device becomes complicated and costs increase.

Therefore, after extensive research, the inventor reversed the positions of the heater and the pump, and by circulating the heat medium liquid heated by the heater, the heated and fluid heat medium liquid was sequentially circulated through the pump. On the other hand, if a heat transfer liquid such as ethylene glycol, which has a high boiling point, low melting point, high viscosity, and low specific heat, is heated in a cylindrical casing, , there are high-temperature areas in the upper part of the casing, especially extremely high-temperature parts in the center part, so if you take out the high-temperature heat transfer liquid from the upper part of the casing and circulate it to the heat dissipation part, it will start up quickly and improve efficiency (heat exchange I found out that it can be done.

This invention was made in view of the above circumstances, and even if a fluid whose viscosity increases as the temperature decreases, such as ethylene glycol, is used as a heat transfer liquid, it will not adversely affect the heater or circulation pump at the beginning of use. The purpose of the present invention is to provide a heat exchanger that has a fast start-up without any problems.

(Means and operations for solving the problems) The heat exchanger according to the present invention has the following structure to solve the above problems.

A heat transfer liquid such as ethylene glycol with a high boiling point, low melting point, and small specific heat is sealed in the circulation pipe, and a heater 10 is provided on the suction port 14a side of the circulation pump 14.
The heat medium liquid outlet 20b of this housing-shaped heater 10
is provided above the heater 10.

Therefore, the heat medium liquid heated by the heater 10 is distributed in the upper part of the heater 10 in order from high temperature to high temperature, and the circulation pump 14 sucks out the heat medium liquid heated to a high temperature and has good fluidity, so that the circulation pipe It can be circulated smoothly in the road.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

As in the conventional example, 10 is a heater, 12 is a heat radiation section, and 1
4 is a circulation pump.

These heating section 10, circulation pump 14, and heat dissipation section 12 are connected in series through a pipe 18 to form one circulation pipe, while the heater 10 is connected adjacent to the suction port side of the circulation pump 14. It is arranged.

In addition, a fluid such as ethylene glycol, which has a high boiling point, a low melting point, and a small specific heat, and whose viscosity increases at low temperatures, is sealed in the circulation pipe as a heat medium liquid, and the fluid heated by the heater 10 is heated. The medium liquid is sucked out and pressure-fed by the circulation pump 14, releases heat in the heat radiating section 12, and flows in the circulation pipe.

Next, the structure of the heater 10 shown in FIG. 2 asb will be explained.

The heater 10 shown in FIG. 2a has an electric heater 22 provided at the lower part of the main body 2o in the form of a casing, and also has an inlet 20a for the heat medium liquid formed at the lower part of the main body 20. Further, a heat transfer liquid outlet 20b is formed in the upper part of the main body 20,
It is connected to the suction port 14a side of the circulation pump 14 via 18a.

In addition, a slight space 24 is formed in the upper part of the main body 20, and an air hole 20c is opened in the upper surface of the main body 20, so that even if the heating medium liquid expands due to heating, it is absorbed in the space 24. 24 maintains atmospheric pressure through air holes 20c.

The heater 10 shown in FIG. 2 has a main body 20. An electric heater 22 and an inlet 20a are formed. On the other hand, the heat medium liquid outlet 20b is
It is formed at the uppermost end of the side surface of the main body 2o, and is connected to the suction port 14a side of the circulation pump 14 via a pipe 18a. Further, an expansion chamber (not shown) is provided at an appropriate position in the circulation circuit or directly in the main body 20 of the heater 10. Therefore, since there is no space above the main body 20, it is possible to sequentially take out the hot heat transfer liquid that has gathered at the top.

3a and 3b show another embodiment of the heater 10. FIG.

The main body 30 of the rectangular parallelepiped heater is connected to the upper chamber 3 by a partition wall 31.
It is divided into two chambers: 0A and a lower chamber 30B.

At the bottom of the lower chamber 30B, two electric heaters 32 are provided along the bottom of the royal chamber 30B. This electric heater 32
passes through the side view 30d of the lower chamber 30B and extends U in the longitudinal direction.
The bottom surface 30e of the lower chamber 30B extends in the shape of a letter.
are arranged parallel to each other. Further, the partition wall 31 at the base of the electric heater 32 has a lower chamber 30B and an upper chamber 30B.
A communication hole 31a communicating with A is provided, and a heat medium liquid outlet 30b is provided in the upper part of the lower chamber 30B in the direction toward the tip of the electric heater 32.

Projecting side surface 30d of the electric heater 32 of the upper chamber 30A
At the upper part of the side surface 30f facing the heating medium liquid inlet 30
A is provided. Further, a space 34 is formed in the upper part of the upper chamber 30A, and an air hole 30c is opened in the upper surface of the upper chamber 30A, so that even if the heat transfer liquid expands due to heating, it is absorbed in the space 34. Space 34 is air hole 30c
This maintains atmospheric pressure.

The heater 10 is configured as described above.

When the power to the electric heater 32 is turned on, the heat medium liquid heated by the electric heater 32 rises to the lower surface of the partition wall 31 of the lower chamber 30B, and the heat medium liquid from the high temperature to the low temperature is sequentially distributed downward. , and the high-temperature heat transfer liquid is sequentially sucked out by the circulation pump 14 and circulated within the circulation pipe. on the other hand,
The heat medium liquid that has circulated through the circulation pipe flows into the upper chamber 30A of the heater 10 from the inlet 30a. Then, the heat medium liquid stored in the upper chamber 30A is stored and the flow rate is reduced, and as shown by arrow A, the heat medium liquid slowly flows down sequentially through the communication hole 31a to the base of the electric heater 32, and is heated in the same manner as above. be done.

Further, the heated heat medium liquid that has risen to the lower surface of the partition wall of the lower chamber 30B heats the heat medium liquid stored in the upper chamber 30A via the partition wall 31, so that wasteful release of heat can be prevented.

Further, since the two-stage structure is adopted, the heated heat transfer liquid can be effectively taken out without forming a space above the lower chamber 30b.

As mentioned above, the heat transfer liquid such as ethylene glycol is distributed downward in order from high temperature to low temperature in the upper part of the casing. It may be formed in the shape shown by the dashed line in the figure. Furthermore, it is preferable that the partition wall 31 be formed so as to rise slightly toward the distal end of the electric heater 32.

Furthermore, an inclined surface 30g may be formed at the tip of the electric heater 32 in the lower chamber 30B to smooth the flow of the heat medium liquid from the outlet 30b.

The present invention is configured as described above, and when used as floor heating, for example, the heat radiating section 12 is laid on the floor. When you use it, when you turn on the heat source,
The heat medium liquid is heated by the electric heaters 22 and 32 of the heater 10, and the heated heat medium liquid is transferred to the main body 20 in the heater shown in FIG. 2, and to the main body 20 in the heater shown in FIG. The heat medium liquid rises to the upper part of the lower chamber 30, is distributed from high temperature to low temperature toward the construction method, and is heated to a high temperature and has improved fluidity. The heat is sucked out one after another, and the heat is further pumped to the heat radiating section 12 by the circulation pump 14 to radiate heat, returns to the heater 10, and is sequentially circulated within the circulation pipe.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and the structure of the heater is not particularly limited. An electric heater was used for this purpose, but this electric heater is
In addition to resistance heating, dielectric heating or induction heating may be used, and not only electric heaters but also other heat sources, such as
Of course, many modifications can be made without departing from the spirit of the invention, such as using gas, kerosene, etc.

(Effects of the Invention) Thus, according to the present invention, even if the power is turned on when the outside temperature is low and the fluidity of the heat transfer medium is poor, the heat transfer liquid will be heated by the heater and will accumulate on the top of the heater. Since the circulation pump sequentially sucks out the heat medium liquid with improved fluidity from the outlet of the heater and pressure-feeds it into the circulation pipe, the circulation pump is not overloaded and there is no adverse effect. Also,
The fluidity of the heat transfer liquid can be ensured at the time of start-up, and it can be made to flow smoothly in the circulation pipe, so that the start-up is extremely quick and a predetermined amount of circulation can be ensured. Furthermore, since the heating medium liquid, which has reached a particularly high temperature, is circulated to a portion of the upper layer in the heater, the start-up becomes even faster.

Further, since fluidity of the heat transfer liquid can be ensured even at low temperatures, the circulation pump can be small-sized, and costs can be kept low.

Furthermore, the expansion chamber and heater can be formed integrally,
This has great effects such as making the entire device more compact.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a circulation pipe of a heat exchanger showing a preferred embodiment of the present invention, FIGS. 2a and b are sectional views of each heater, and FIGS. A vertical cross-sectional view and a cross-sectional view of the vessel, and FIG. 4 are explanatory diagrams showing the circulation pipes of a conventional heat exchanger. DESCRIPTION OF SYMBOLS 10... Heater, 12... Heat radiation part, 14... Circulation pump, 14a... Suction port, 18.18a---Pipe,
20... Main body, 20a... Inlet, 20b... Outlet, 20c... Air hole, 22... Electric heater, 24... Space, 30... Main body, 30A... Upper chamber, 30B...lower chamber, 30a...inlet, 30b...
・Outlet port, 30c... Air hole, 30d, 30f,
,, Side, 30e...Bottom, 30g...Slope, 3
DESCRIPTION OF SYMBOLS 1... Partition wall, 31a... Communication hole, 32... Electric heater, 34... Space.

Claims (1)

[Claims] 1. In a heat exchanger that heats a low-temperature, highly viscous heat medium liquid with a heater, circulates it in a circulation pipe with a circulation pump, and radiates heat in a heat radiation section, the heater is placed on the suction port side of the circulation pump. A heat exchanger characterized in that the heat exchanger is provided with an outlet for taking out the heat medium liquid of the heater at the upper part of the heater.