JPH0140261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a non-powered heat transfer device used in solar water heaters, exhaust heat recovery devices, air conditioners, and the like.

Conventional Structure and Problems Conventionally, this type of heat transfer device has been structured as shown in FIG. A heat exchange tank 2 storing hot water is arranged below a collector 1 (generator) consisting of a plurality of heat collecting pipes, and a check valve 4a is installed between the heat exchanger 3 housed in the tank 2 and the collector 1. They are connected by an outgoing pipe 5 provided with a. A liquid reservoir tank 7, in which a liquid level detection sensor 6 is housed, is arranged above the collector 1, connected to the heat exchanger 3 through a return pipe 8, and connected to the collector 1 with a check valve 4b on the way. The upper part of the liquid reservoir tank 7 and the upper part of the collector 1 are connected by a return pipe 9, and an on-off valve 1 is provided in the middle.
0 (valve mechanism) is connected through a communication pipe 11 provided with a valve mechanism. The liquid level of the hydraulic fluid 12 is controlled by a controller 13 that opens the on-off valve 10 when the liquid level of the hydraulic fluid 12 detected by the liquid level detection sensor 6 becomes larger than a set value H.

When the collector 1 is heated by sunlight, the working fluid 12 boils and evaporates, and by increasing the pressure inside the collector 1, the heated working fluid 12 is pushed through the outgoing pipe 5 and into the heat exchanger 3, where it is heat exchanged. The working fluid 12 that has been cooled by exchanging heat with the hot water in the tank 2 is sent to the liquid reservoir tank 7 through the return pipe 8, and the level of the working fluid 12 in the fluid reservoir tank 7 gradually rises. To go. When the liquid level of the hydraulic fluid 12 detected by the liquid level detection sensor 6 becomes larger than the set value H, the controller 1
3, the on-off valve 10 is opened and the collector 1 is opened.
The upper part of the collector tank 7 and the upper part of the liquid reservoir tank 7 are communicated with each other by a communication pipe 11, and the pressure inside the collector 1 is guided to the liquid reservoir tank 7.
is collected into the collector 1 through the return pipe 9. When the level of the hydraulic fluid 12 decreases and becomes smaller than the set value H, the controller 13 closes the on-off valve 10 and the collection of the hydraulic fluid 12 to the collector 1 is completed. The working fluid 12 heated by solar radiation in the collector 1 is heat-exchanged with the hot water in the heat exchange tank 2 in the heat exchanger 3, and the cooled working fluid 12 is guided to the fluid reservoir tank 7. Liquid level controller 1
3, the on-off valve 10 is held at the set value H.
Heat was transferred from the collector 1 to the heat exchange tank 2 by controlling the .

In this configuration, (1) when the on-off valve 10 is opened and the collector 1 and the liquid reservoir tank 7 are communicated with each other, the vapor of the high temperature working fluid 12 in the collector 1 flows into the liquid reservoir tank 7; The temperature of the working fluid 12 in the liquid reservoir tank 7 rises corresponding to the amount of heat of condensation, and the temperature of the working fluid 12 in the collector tank 7 increases.
Since the working fluid 12 having a high temperature is recovered, the heat collection temperature of the collector 1 becomes high, reducing the heat collection efficiency. (2) When the on-off valve 10 is in the open state, the outgoing pipe 5,
Since the working fluid 12 in the heat exchanger 3 and the outgoing pipe 8 is stopped and the heat exchanger 3 is not functioning as a heat exchanger, there is also resistance due to inertia when the on-off valve 10 is closed. Therefore, the flow rate of the working fluid 12 does not increase immediately and the predetermined heat exchange capacity cannot be obtained.
This had the problem of deteriorating heat transfer performance.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
reducing the temperature difference between the generator and the heat exchanger, and
The purpose is to improve heat transfer performance by increasing the heat exchange performance of a heat exchanger.

Structure of the Invention In order to achieve the above object, the present invention provides a portion between the heat exchanger and the check valve of an outgoing pipe that connects a heat exchanger and a generator and is provided with a check valve in the middle. , the lower part of the liquid storage tank is connected by a return pipe provided with a check valve in the middle, and the return pipe and the generator are connected by a return pipe provided in the middle with a check valve.

With this configuration, the heat is exchanged through the heat exchanger in the heat exchange tank, the temperature becomes low, and the temperature is recovered by the generator, so the generator temperature is lowered and the temperature difference with the heat exchanger is reduced. Also, when the valve mechanism on the communication pipe is open, the working fluid in the fluid reservoir tank flows into the heat exchanger.
In addition, when the valve mechanism is closed, the working fluid in the generator is sent to the heat exchanger, so the heat exchanger always functions as a heat exchanger, and since there is no resistance due to inertia, the working fluid in the heat exchanger The heat transfer performance is improved by increasing the flow rate.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same members as in FIG. 1 are given the same numbers. A sub-tank 14 provided above the collector 1 (generator) consisting of a plurality of heat collection pipes is connected by piping to the upper part of the collector 1, and is placed below the collector 1, and is used to store hot water in the heat exchange tank 2. The heat exchanger 3 and the lower part of the sub-tank 14 are connected by an outgoing pipe 5 having a check valve 4a in the middle. A liquid reservoir tank 7 in which a liquid level detection sensor 6 is housed
is disposed above the collector 1, and is connected to the heat exchanger 3 by a return pipe 8 with a check valve 4c provided in the middle, and is connected to the upper part of the sub-tank 14 by an on-off valve 10 (valve mechanism) provided in the middle. They are connected through a communication pipe 11.
An outgoing pipe 5 between the heat exchanger 3 and the check valve 4a and a return pipe 9 in which the lower part of the liquid reservoir tank 7 is provided with a check valve 4b in the middle.
A return pipe 8 between the heat exchanger 3 and the check valve 4c and the lower part of the collector 1 are connected by a return pipe 15 having a check valve 4d in the middle. At this time, return pipe 9
Similar effects can be obtained by connecting the return pipe 8 and the return pipe 15 to the outgoing pipe 5. A controller 13 that opens the on-off valve 10 when the liquid level of the hydraulic fluid 12 detected by the liquid level detection sensor 6 becomes larger than a set value H.
The level of the hydraulic fluid 12 is controlled by.

The working fluid 12 boils and evaporates when the collector 1 is heated by sunlight, and by increasing the pressure inside the collector 1, the heated working fluid 12 is sent to the sub-tank 14 in two phases of gas and liquid, where the gas and liquid are separated. The working fluid 12 is forced into the heat exchanger 3 through the outgoing pipe 5, and the working fluid 12, which has been cooled by exchanging heat with the hot water in the heat exchange tank 2, passes through the returning pipe 8 and is transferred to the liquid reservoir tank 7. The liquid level of the working fluid 12 in the fluid reservoir tank 7 gradually rises. Liquid level detection sensor 6
When the liquid level of the hydraulic fluid 12 detected by the controller 13 becomes larger than the set value H, the on-off valve 10 is opened by the controller 13, and the upper part of the sub-tank 14 and the upper part of the liquid reservoir tank 7 are communicated with each other through the communication pipe 11. , the pressure inside the sub-tank 14 is led to the liquid storage tank 7, and the vapor of the working liquid 12 in the upper part of the sub-tank 14 is sent to the liquid storage tank 7, where it is cooled and condensed, which corresponds to the amount of heat of condensation. The heated working fluid 12 is sent to the heat exchanger 3 through the return pipe 9 and part of the outgoing pipe 5, where it exchanges heat with hot water. It is cooled and sent to the lower part of the collector 1 through a part of the return pipe 8 and the return pipe 15, and is collected by the collector 1. The liquid level of the hydraulic fluid 12 in the fluid reservoir tank 7 decreases and the set value H
When it becomes smaller, the on-off valve 10 is closed by the controller 13, and the recovery of the hydraulic fluid 12 to the collector 1 is completed. In other words, when the on-off valve 10 is open, the pressure in the sub-tank 14 is applied to the liquid reservoir tank 7, resulting in a high pressure. Enter exchanger 3. The working fluid 12 that has undergone heat exchange and exited the heat exchanger 3 is sent to the lower part of the collector 1 through a return pipe 15 and a check valve 4d. At this time, the working fluid that has exited the heat exchanger 3 and entered the return pipe 8 does not enter the liquid storage tank 7 because the pressure within the liquid storage tank 7 is high. Further, when the on-off valve 10 is in the closed state, the pressure inside the liquid reservoir tank 7 is reduced by the cooled hydraulic fluid 12. Therefore, the working fluid 12 leaving the heat exchanger 3 is sent to the fluid storage tank 7 through the return pipe 8. At this time, the working fluid 12 leaving the heat exchanger 3 does not flow into the collector 1 through the return pipe 15 because the pressure on the collector 1 side is high.

In this way, in the above embodiment, the hydraulic fluid 12
When the working fluid 12 is recovered from the control tank 7 to the collector 1, the working fluid 12 heated by the heat of condensation of the steam of the working fluid 12 is cooled by exchanging heat with hot water in the heat exchanger 3, and then is collected into the collector 1. Therefore, the heat collection temperature of the collector 1 is lowered and the heat collection efficiency is improved.
When the on-off valve 10 is open or closed, the working fluid 12 passes through the heat exchanger 3, so the heat exchanger 3 always functions as a heat exchanger, and since there is no resistance due to inertia, the working fluid 12 in the heat exchanger 3 The flow rate is increased, the heat exchange capacity is enhanced, and the heat transfer performance and heat collection efficiency are improved.

Effects of the Invention The heat transfer device of the present invention has a part between the heat exchanger and the check valve of an outgoing pipe that connects a heat exchanger and a generator and is provided with a check valve in the middle, and a liquid reservoir. The lower part of the tank is connected with a return pipe with a check valve in the middle, and the return pipe and the generator are connected with a return pipe with a check valve in the middle. The working fluid in the reservoir tank undergoes heat exchange with the heat exchanger, becomes low temperature, and is recovered by the generator.The temperature difference between the generator and the heat exchanger becomes small, making it possible to transfer heat with a low temperature difference. (2) When the working fluid is recovered from the liquid storage tank to the generator, the working fluid exchanges heat in the heat exchanger, and the heat exchange capacity is increased without reducing the flow rate of the working fluid due to intermittent operation.

[Brief explanation of drawings]

Figure 1 is a system diagram of a conventional heat transfer device, Figure 2 is a system diagram of a conventional heat transfer device.
The figure is a system diagram of a heat transfer device according to an embodiment of the present invention. 1... Generator, 2... Heat exchange tank, 3... Heat exchanger, 4a, 4b, 4c, 4d,... Check valve,
5... Outgoing pipe, 6... Liquid level detection sensor, 7... Liquid reservoir tank, 8... Return pipe, 9... Return pipe, 10...
Valve mechanism, 11... Communication pipe, 12... Hydraulic fluid, 15
...Return tube.

Claims (1)

[Scope of Claims] 1. A generator in which a working fluid is sealed and generates steam, a heat exchanger provided in a heat exchange tank located below the generator, and a heat exchanger located above the generator. A liquid reservoir tank in which a liquid level detection sensor is housed, an outgoing pipe that connects the generator and the heat exchanger and is provided with a check valve in the middle, and connects the heat exchanger and the liquid reservoir tank. a return pipe that connects the upper part of the generator and the upper part of the liquid storage tank and is provided with a valve mechanism in the middle that is controlled by the liquid level detection sensor, and between the heat exchanger and the check valve. A return pipe connects the outgoing pipe and the lower part of the liquid storage tank and is provided with a check valve in the middle, and a return pipe connects the return pipe and the generator and is provided with a check valve in the middle. Heat transfer equipment. 2. The heat transfer device according to claim 1, wherein a check valve is provided between the connection part with the return pipe and the liquid storage tank on the return pipe.