JPS6011335Y2 - Differential temperature control valve - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a differential temperature control valve.

A differential temperature control valve is a differential temperature valve that has a temperature regulating effect,
The present invention aims to achieve this with a simple structure using a shape memory alloy.

Note that a differential temperature valve is a valve that is open when the temperature at the outlet of the valve is the same and is open when the temperature is different, or a valve that operates in the opposite way.

An embodiment of the present invention will be described below based on the drawings.

This embodiment shows the case where it is installed in a heat storage tank of a solar system, and 1 is a heat collection system that absorbs solar energy E and sends out high-temperature water.

2 is a heat utilization system.

3 is a heat storage tank; 4 is a valve that selects a high temperature water flow path 5 of the heat collection system 1; for example, a flow path to the heat utilization system 2 or the heat storage tank 3 is determined;

Reference numeral 4' denotes a valve that selects the flow path of low-temperature water from the heat utilization system 2, and determines, for example, the flow path to the heat collection system 1 or the heat storage tank 3.

6.7 is an inlet and an outlet of the heat storage tank 3, 8 is an outlet side flow path communicating with the outflow lower, 9, 10, 11, 12.13 is the tank interior 14 of the heat storage tank 3 and the outlet side flow path 8. a flow path that communicates with
Reference numerals 15, 16, 17, and 18 are differential temperature control valves respectively disposed in channels 9, 10, 11, and 12 of the channels 9 to 13, excluding the uppermost channel 13.

2 to 4 show the operation of each differential temperature control valve. Reference numeral 19 is a communication chamber surrounded by a partition wall 20, and the communication chamber 19 is connected to the inlet side flow path 21 on the tank interior 14 side. The outlet side flow path 8 is connected.

Reference numerals 22 and 23 denote first and second communication holes bored in the partition wall 20, and the first communication hole 22 connects the communication chamber 19 and the inlet side channel 2.
1, and the second communication hole 23 communicates the communication chamber 19 with the outlet side flow path 8.

24 and 25 are the first and second communication holes 22.2, respectively.
3 is the first and second obturator that can be occluded, 26.27 is the first obturator
, springs that bias the second obturators 24 and 25 in the direction of closing the eleventh and second communication holes 22 and 23, respectively, and the springs 26 and 27 have a constant biasing force regardless of the ambient temperature. .

28 and 29 are springs respectively disposed in the inlet side flow path 21 and the outlet side flow path 8, both of which are made of shape memory alloy;
The first and second obturators 24.25 are urged in a direction to open the first and second communication holes 22.23.

Note that springs 26.27 and 28.29 are
At a temperature higher than the transformation temperature of the springs 28 and 29, biasing forces are formed in the springs 26<springs 28 and 27<springs 29.

With this configuration, the high-temperature water in the high-temperature water flow path flows from the heat collection system 1 to the heat utilization system 2 via the valve 4, and the heat utilization system 2
When the heat starts to become too much, the valve 4 is switched to flow high temperature water into the heat storage tank 3 and heat storage begins.

When the heat storage is completed and high temperature water is no longer sent from the heat collection system 1, the valve 4 becomes completely on the heat storage tank 3 side and sends high temperature water from the heat storage tank 3 to the heat utilization system 2.

At the start of heat storage, each differential temperature control valve 15 to 1 of the heat storage tank 3
Since both the inlet side flow path 21 and the outlet side flow path 8 of 8 are below the transformation temperature of the spring 28, 29, the spring 2
8.29 is contracted, and the eleventh second obturator 24.25 is compressed by the biasing force of the spring 26.27, and the first and second obturators 24.25 are contracted by the biasing force of the spring 26.27. The communication holes 22 and 23 of No. 2 are closed (state shown in Fig. 2).

When high-temperature water flows into the heat storage tank 3 in this state, the high-temperature water flows into the inlet side flow path 21 of the differential temperature control valve 15, which is at the lowest level, and causes the spring 28 to rise to a temperature higher than the transformation temperature T. Therefore, the spring 28 expands and pushes up the first obturator 24 against the biasing force of the spring 26.
The first communication hole 22 is opened.

However, at this time, the spring 29 has a transformation temperature T
Since the temperature does not become higher than 1, the second obturator 25 closes the second communication hole 23.

[Status shown in Figure 3]. Therefore, the high-temperature water level in the heat storage tank 3 gradually increases, and the remaining temperature difference control valves 16, 17, and 18 also gradually shift from the state shown in FIG. 2 to the state shown in FIG. 3.

When the high temperature water level finally reaches the uppermost channel 13,
High-temperature water overflows from the flow path 13 to the outlet side flow path 8, and the temperature of the outlet side flow path 8 becomes equal to or higher than the transformation temperature T
Lift the second obturator 25 against the
3 is in the open state (state in Fig. 4).

The high temperature water 30 flows from the flow paths 9, 10, 11, and 12 to the outlet side flow path 8.

When high-temperature water is taken out from the heat storage tank 3 in this way, the temperature drops from the bottom of the tank interior 14, and the first obturator 24 of the bottom differential temperature control valve 15 first The communication hole 22 is closed, and high-temperature water flows from the upper differential temperature control valves 16, 17, and 18.

After that, the first communication holes 22 of the differential temperature control valves 16, 17, and 18 are closed in order from the lowest level, and the differential temperature control valves 15 to 18 do not open until high temperature water accumulates in the heat storage tank 3 again. .

Note that it is more effective if the heat storage tank 3 itself is configured to have temperature stratification (the upper part is hotter and the lower part is colder due to the density difference due to temperature).

In the above embodiment, the differential temperature control valve has a spring 28.2.
9 is made of a shape memory alloy so that the inlet side flow path and the outlet side flow path are in an open state when the temperature is higher than the transformation temperature, and are in a closed state when one of them is below the transformation temperature. For example, the first obturator 24 When the spring 28 of the second obturator 25 is made of a shape memory alloy, the shape memory alloy may be inserted in different places between the inlet side flow path and the outlet side flow path, such as when the spring 27 of the second obturator 25 is made of a shape memory alloy. Therefore, a reverse operation is also possible in which the opening state occurs when there is a temperature difference between the inlet side flow path and the outlet side flow path, and the closed state occurs when the temperature is isothermal or higher than the transformation temperature T1.

Further, although the above embodiments have been described using a solar system as an example, heat can be stored in a similar manner even in a system that uses waste heat.

As described above, according to the present invention, it is possible to realize a temperature difference valve that has both a temperature difference effect and a temperature control effect with a simple structure, and is particularly effective when forming a stratified type heat storage tank.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Figure 1 shows the constituent countries of a solar system using a differential temperature control valve, and Figures 2 to 4 are longitudinal sections for explaining the operation of the differential temperature control valve. It is a front view. 8... Outlet side flow path, 15, 16, 17, 18.
...Differential temperature control valve 19...Communication chamber, 21
...Inlet side flow path, 22...First communication hole, 23...Second communication hole, 24...
First obturator, 25...Second obturator, 28.
...Spring [first spring], 29...
...Spring [second spring].

Claims (1)

[Scope of utility model registration request] A first communication hole that connects the inlet side flow path and the outlet side flow path via a communication chamber surrounded by a partition wall, and communicates the communication chamber and the inlet side flow path with the partition wall, and the communication chamber and the outlet side flow path. A second communication hole is bored through which the communication holes communicate with each other, and first and second obturators that can respectively close the first and second communication holes are provided, and the inlet side flow path is hollowed out from a shape memory alloy. A first spring is provided that biases the first obturator in a direction to close the first communication hole at a temperature lower than or higher than the transformation temperature, and the outlet side flow path is provided with a first spring made of a shape memory alloy. 1. A differential temperature control valve comprising a second spring that biases the second obturator in the direction of closing the second communication hole at a temperature below the transformation temperature or higher than the transformation temperature.