JPH0772675B2 - Heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchange device that uses, for example, waste hot water to melt snow on a road surface, remove ice, and prevent freezing.

[Conventional technology]

FIG. 2 shows a conventional heat exchange device disclosed, for example, in Japanese Utility Model Publication No. 58-38005, in which (1) is a hot water storage tank in which waste hot water and the like are stored. (2) is a hot water channel through which hot water in the hot water storage tank (1) flows through the water pipe (3), and is generally arranged so that hot water flows from a high place to a low place. (4) is a water supply pump that is arranged in the water supply pipe (3) to supply the hot water in the hot water storage tank (1) to the hot water passage (2), (5) is the heated part, and the figure shows the road surface (hereinafter, It is referred to as the road surface).
In (6), the heat receiving part (6a) on one end side is in thermal contact with the hot water flowing in the hot water passage (2), and the heat radiating part (6b) on the other end side is the heated part in the road surface (5) A plurality of heat pipes embedded in the hot water passage (2), and a working fluid for transporting heat inside the heat pipe (6), such as water, alcohol, freon, ammonia, etc. Has been done. FIG. 3 shows an example of the hot water channel (2), and the heat pipe (6)
The heat receiving part (6a) is arranged in the groove-shaped hot water channel (2), and the hot water channel (2) is shown attached to the road surface (5).

Next, the operation will be described. The heat radiating parts (6b) of the heat pipe (6) are embedded in the road surface (5) which is a heated part at an appropriate interval, and the heat receiving part of the heat pipe (6) ( Place 6a). Water pump for hot water in hot water storage tank (1) (4)
To flow through the water pipe (3) to the hot water channel (2). The heat receiving part (6a) of the heat pipe (6) is heated by the hot water flowing through the hot water passage (2), the working liquid in the heat pipe (6) is vaporized, and the heat quantity of the hot water is taken as evaporation latent heat.
(6) Move to the heat dissipation part (6b) through the inside. heat pipe
The vapor of the working liquid that has moved to the heat dissipation part (6b) of (6) is on the road surface (5).
Since it is lower than hot water, it condenses into liquid and releases latent heat of condensation to the road surface (5). Liquefied working liquid is heat pipe
It flows along the inner wall surface of (6) and returns to the heat receiving portion (6a). By naturally repeating the above operation, the heat quantity of the hot water flowing through the hot water passage (2) is transferred to the road surface (5), and the road surface (5) is reduced to zero.
It can be heated above ℃ and melts snow on the road surface (5), removes ice, and prevents freezing.

[Problems to be Solved by the Invention]

Since the conventional heat exchange device is configured as described above,
Since the upper part of the hot water channel (2) is open, there is heat dissipation due to evaporation from the liquid surface and rainwater and snowmelt hot water channel (2)
Since the temperature of hot water decreased due to the invasion into the water, heat loss was large and efficient heat exchange characteristics could not be obtained. Further, there is a problem that surrounding dust is apt to deposit on the hot water passage (2), and when waste hot water or the like is used as a heat source, a handshake is generated, which is unsanitary. Further, when the road has a gradient in the longitudinal direction, there is a problem that the flow rate is restricted in order to keep the water surface in the warm water channel (2) substantially constant at each position. Moreover, the hot water was simply circulated in the hot water channel (2), and the hot water wasted wastefully.

The present invention has been made to solve the above problems, and an object thereof is to provide a highly efficient and highly reliable heat exchange device.

[Means for Solving the Problems]

The heat exchanger according to the present invention detects a tank to which hot water is supplied and stores the hot water, an upper limit water level and a lower limit water level of the hot water in the tank, and supplies the hot water to the tank and a stop signal. A water level detector that outputs, and a pipe body that is arranged below the tank and through which hot water from the tank flows,
A heat pipe in which a heat receiving portion on one end side is in thermal contact with hot water flowing in the pipe body and a heat radiating portion on the other end side is arranged in the heated portion, and an on-off valve arranged on the outlet side of the pipe body A control device is provided which closes the on-off valve when the open state of the on-off valve reaches a predetermined time and opens the on-off valve when the closed state of the on-off valve reaches a predetermined time.

[Action]

In the heat exchange device according to the present invention, the hot water in the tank naturally flows down by gravity and flows into the conduit body. When the open state of the on-off valve reaches a predetermined time, the on-off valve is closed by the control device and the warm water is removed from the conduit body. The heat quantity of the hot water is transferred to the heated part by a heat pipe to heat the heated part, and when the on / off valve is closed for a predetermined time, the on / off valve is opened by the control device to open the conduit body. Drain hot water from.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. Fig. 1 shows a heat exchange device for melting snow, deicing, and preventing freezing by using waste hot water from hot springs, for example. In Fig. 1, (5) is the road surface to be heated, (6) Is a heat pipe,
(6a) is a heat receiving part, (6b) is a heat radiating part, (7) is a hot water storage tank for collecting waste hot water such as hot springs, (8) is a pump, (9) is a hot water storage tank (7) to pump (8) ), A tank for storing hot water sent through the hot water supply pipe (10), (11) a filter, (12) a three-way valve, (1)
Reference numeral 3) is a conduit body through which hot water from the tank (9) circulates through the water supply pipe (14) and is arranged below the tank (9). That is, the tank (9) is arranged at a higher place than the conduit body (13), and the warm water in the tank (9) is naturally flowed down to the conduit body (1
3) Distribute inside. The heat receiving part (6a) of the heat pipe (6) is arranged in the conduit body (13) so as to make thermal contact with the hot water in the conduit body (13). (15) is an on-off valve arranged on the outlet side of the pipe body (13), (16) is a drain pipe, (17) is a water level detector installed in the tank (9), and Detect the upper and lower water levels of warm water. (18) is a detector for detecting the open / closed state of the open / close valve (15), and (19) is a control device, which is a set time A after the detector (18) detects the open / closed state of the open / close valve (15). When the temperature reaches, the on-off valve (15) is closed and hot water having a high temperature from the tank (9) is retained in the conduit body (13). And
When the detector (18) detects the closed state of the on-off valve (15) and reaches a certain set time B, the on-off valve (15) is opened and the hot water in the conduit (13) is passed through the drain pipe (16). Let it drain.

Further, when the water level detector (17) detects the lower limit water level of the hot water in the tank (9), the control device (19) operates the pump (8) by the detection signal to operate the hot water in the hot water tank (7). Refill the tank (9). Then, when the water level detector (17) detects the upper limit level of hot water in the tank (9), the pump (8) is stopped by the detection signal and the three-way valve (12) is switched to change the hot water storage tank (7).
The hot water of the above is discharged from the hot water discharge pipe (20). Water level detector again
(17) When the lower limit water level is detected, the three-way valve (12) is switched and the pump
The hot water in the hot water storage tank (7) is replenished into the tank (9) by operating (8).

Next, the operation will be described. Hot water in the hot water tank (7) is pumped
Filter (11), three-way valve (12), pump
(8), stored in the tank (9) via the hot water supply pipe (10). The tank (9) is arranged above the pipe body (13), that is, at a height of several meters from the road surface (5). The hot water stored inside the tank (9) is circulated to the pipe body (13) through the water supply pipe (14) by gravity falling. The open state of the on-off valve (15) is detected by the detector (18), and the detection signal is input to the control device (19). The control device (19) operates to close the open / close valve (15) when a certain set time A is reached after receiving the detection signal from the detector (18). When the on-off valve (15) is closed, the pipe body (13) is filled with warm water. When hot water fills the inside of the pipe body (13), the water level in the tank (9) rises, but the water level detector (17) detects the upper limit water level and the detection signal is input to the control device (19). It The control device (19) operates to stop the pump (8) and switch the three-way valve (12) when the detection signal from the water level detector (17) is input, and the hot water from the hot water tank (7) is stored in the tank ( 9)
It is designed to discharge from the hot water discharge pipe (20) without sending hot water. By the way, the heat receiving part (6a) of the heat pipe (6) arranged inside the conduit body (13) makes thermal contact with the hot water filling the inside of the conduit body (13) and is heated by the hot water. The working liquid in the heat pipe (6) is vaporized and removes the heat quantity of the hot water as latent heat of vaporization, passes through the heat pipe (6) and moves to the heat radiating portion (6b) embedded in the road surface (5). The vapor of the working liquid that has moved to the heat radiating portion (6b) of the heat pipe (6) is condensed and liquefied because the road surface (5) has a lower temperature than the hot water, and releases latent heat of condensation to the road surface (5). The liquefied working liquid travels along the inner wall surface of the heat pipe (6) and returns to the heat receiving portion (6a). This operation is naturally repeated, and accordingly, the heat quantity of the hot water in the pipe body (13) is transferred to the road surface (5) by the heat pipe (6), and the temperature of the hot water decreases. On the other hand, the open / close valve (15) by the detector (18)
Is detected, and the detection signal is input to the control device (19). The control device (19) turns on the open / close valve (15) when it reaches a set time B after receiving the detection signal from the detector (18), for example, the time when the hot water in the conduit body (13) falls below a predetermined temperature. Operates like an open state. When the on-off valve (15) opens, the pipe body
(13) The warm water with a lowered temperature is filled in the drain pipe (16)
At the same time as the hot water in the tank (9) is discharged from the pipe (14), it flows through the water pipe (14) into the pipe body (13).
The temperature inside 3) rises. On the other hand, the detector (18) opens and closes the valve.
The open state of (15) is detected, and the detection signal is the control device (19).
Entered in. The control device (19) again receives the detection signal, and when it reaches a certain set time A, for example, the time when the temperature of the hot water in the conduit body (13) exceeds a certain set temperature, the on-off valve (15) is again opened.
Is closed, and the inside of the conduit body (13) is refilled with warm water. When the water level in the tank (9) falls and the water level detector (17) detects the lower limit water level, the control device (19) switches the three-way valve (12) and operates the pump (8) to operate the hot water tank (7). Tanks for hot water (9)
Supply to. By repeating the above operations, the road surface
(5) is heated to 0 ° C or higher to perform snow melting, deicing and freeze prevention on the road surface (5). As a result, the pipe body (13)
The heat release due to evaporation from the liquid surface disappears due to the non-opening of the
The heat loss can be made extremely small, and efficient heat exchange characteristics can be obtained. Further, when waste hot water or the like is used as a heat source, no bad odor is generated and it is hygienic. Further, when the road has a gradient in the longitudinal direction, the inside of the conduit body (13) is filled with hot water, so that it is constant at each position and can be made uniform. In addition, the hot water is not discharged wastefully, but the hot water is filled in the pipe body (13) and retained, and the heat quantity of the hot water is effectively used before being discharged. It can be used effectively.

In the above embodiment, when the water level detector (17) detects the upper limit water level, the pump (8) is stopped and the three-way valve (12) is switched to discharge hot water from the hot water tank (7) to the hot water discharge pipe (20). Although the three-way valve (12) was omitted, the hot water discharge pipe (20) was provided with a valve, and the hot water in the hot water storage tank (7) was discharged from the discharge pipe (20) by opening the valve. It is also possible to stop the pump (8) only with the valve closed,
Alternatively, the three-way valve (12) and the drainage pipe (20) are omitted and the pump (8) is used.
Alternatively, only the hot water storage tank (7) may be stopped to stop supplying hot water to the tank (9).

Further, in the above embodiment, the open / closed state of the on-off valve is detected by the detector, and the case where the on-off valve is opened / closed by a set time after the detection is described, but the detector is omitted,
It is also possible to set a certain set time from the opening operation output from the control device and a certain set time from the closing operation output from the control device to the timers to perform the opening / closing operation of the on-off valve, similar to the above embodiment. Produce the effect of.

Further, in the above embodiment, the heated portion is a road surface, and the case of a heat exchange device applied to snow melting, deicing, freezing prevention, etc. of the road surface has been described, but the heated portion is used as a roof to melt snow, and the roof is removed. The present invention can be applied to ice, freeze prevention, and the like, and the same effects as those of the above-described embodiments can be obtained.

In addition, the heat radiation part of the heat pipe is used for the floor of the factory, building,
The present invention may be applied as a heating device by arranging it on a ceiling, a wall, or the like.

〔The invention's effect〕

As described above, the present invention detects a tank to which hot water is supplied and stores the hot water, the upper limit water level and the lower limit water level of the hot water in the tank, and supplies the hot water to the tank and a stop signal. A water level detector for outputting, and a pipe body which is arranged below the tank and through which hot water from the tank flows,
A heat pipe in which a heat receiving portion on one end side is in thermal contact with hot water flowing in the pipe body and a heat radiating portion on the other end side is arranged in the heated portion, and an on-off valve arranged on the outlet side of the pipe body A control device is provided that closes the open / close valve when the open state of the open / close valve reaches a predetermined time and opens the open / close valve when the open state of the open / close valve reaches a predetermined time. When the open / close valve is circulated in the body and the open state reaches a predetermined time, the control device closes the open / close valve and the hot water is filled in the pipe body, and the heat quantity of the hot water is transferred to the heated part by the heat pipe to When the heated part is heated and the on / off valve is closed for a predetermined time, the control device opens the on / off valve to discharge hot water from the conduit body, so heat loss can be made extremely small. To get an efficient and reliable heat exchange device It can be.

[Brief description of drawings]

FIG. 1 is a system diagram showing a heat exchange device according to an embodiment of the present invention, FIG. 2 is a system diagram showing a conventional heat exchange device, and FIG. 3 is a perspective view showing an installed state of a conventional heat pipe. . In the figure, (5) is a heated portion, (6) is a heat pipe, (9)
Is a tank, (13) is a conduit, (15) is an open / close valve, and (19) is a controller. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A tank for supplying hot water and storing the hot water, and an upper limit water level and a lower limit water level of the hot water disposed in the tank are detected, and supply of hot water to the tank and a stop signal are output. Water level detector, which is disposed below the tank, hot water from the tank flows, the heat receiving portion on one end side is in thermal contact with the hot water flowing in the pipe body, the other end Side heat radiating portion is arranged in the heated portion, an opening / closing valve arranged on the outlet side of the conduit body, and when the open state of the opening / closing valve reaches a predetermined time, the opening / closing valve is closed and A heat exchange device, comprising: a controller that opens the on-off valve when the on-off valve is closed for a predetermined time. 2. A tank for supplying hot water and storing the hot water, and an upper limit water level and a lower limit water level of the hot water disposed in the tank are detected, and supply of the hot water to the tank and a stop signal are output. Water level detector, which is disposed below the tank, hot water from the tank flows, the heat receiving portion on one end side is in thermal contact with the hot water flowing in the pipe body, the other end Side heat radiating portion is arranged in the heated portion, an opening / closing valve arranged on the outlet side of the conduit body, a detector for detecting the open / closed state of the opening / closing valve, and detection from the detector A heat exchange device, comprising: a control device that opens and closes the open / close valve when a predetermined time has elapsed after receiving a signal. 3. A tank for supplying hot water and storing the hot water, and an upper limit water level and a lower limit water level of the hot water disposed in the tank are detected, and hot water supply to the tank and a stop signal are output. Water level detector, which is disposed below the tank, hot water from the tank flows, the heat receiving portion on one end side is in thermal contact with the hot water flowing in the pipe body, the other end Side heat radiating portion is disposed in the heated portion, an on-off valve disposed on the outlet side of the conduit, a control device for opening and closing the on-off valve, and the on-off valve of the control device. And a timer device for timers for a predetermined time from the opening operation output and a predetermined time from the closing operation output of the opening / closing valve of the control device, and outputting an opening / closing signal to the control device when each predetermined time is reached. Heat exchange device characterized by