JPS6115346B2 - - Google Patents

Description

[Detailed Description of the Invention] As home air conditioning becomes more widespread in the summer,
The demand for electricity for cooling during the daytime in the summer is rapidly increasing, and the lack of power supply during peak hours is becoming a serious problem due to the difficult location of power plant construction.There is a need for an air conditioner with a cold storage function in today's world. Gender is beyond debate. In addition, heat pump heaters are attracting attention and becoming popular as a heating method with high energy usage efficiency, but their efficiency decreases when the nighttime temperature drops.
If you operate a machine during the day when the temperature is high and store heat in a heat storage device placed indoors, you can use energy efficiently, so in the era of energy conservation, indoor terminals with heat storage and cold storage functions are available. Air conditioners play an important role.

On the other hand, in order to perform heat storage and cold storage indoors, a compact device with a large capacity is required, so a device that utilizes the input and output of latent heat due to phase changes, etc., rather than storage of heat by sensible heat, would be useful. However, as a regenerator for cooling, it is desirable that this phase change occurs at around 0°C to 10°C, whereas for heating, this phase change must be considered to occur at 30°C or higher. In this way, it is difficult to utilize one phase change of one substance for two purposes. Therefore, two heat storage devices are required, one for cooling and one for heating.

As a conventional device, there is one shown in Figure 1.
In Figure 1, a heat exchanger 2' is installed in a regenerator 1' filled with a heat storage material that changes phase at low temperatures, and a heat exchanger 3' is installed in a regenerator 3' filled with a heat storage material that changes phase at higher temperatures. A heat exchanger 4' that can exchange heat with indoor space and a heat exchanger 5' that can exchange heat with indoor space are connected to a liquid refrigerant pipe 8' and a vaporized refrigerant pipe 9' via switching valves 6' and 7'. Liquid refrigerant flows through exchanger 2' for cold storage, liquid refrigerant flows through heat exchanger 5' for cooling, vaporized refrigerant flows through heat exchanger 4' for heat storage, and vaporized refrigerant flows through heat exchanger 5' for heating. There are four possible ways to use it: The difficulty in this case is that when trying to extract the heat stored in the regenerator 1' and the regenerator 3' to cool or heat the room, the heat exchangers 10' and 11' are used to exchange heat with the indoor space. Must be provided separately within each incineration tank. Therefore, it is necessary to separately add a heat medium circulation means and a heat exchanger to the regenerator 1' and the regenerator 3', resulting in disadvantages such as a complicated structure and increased manufacturing cost.
The present invention eliminates the drawbacks of the prior art.

The present invention combines these two heat storage devices with an indoor heat exchanger, and performs six uses of cold storage, heat storage, cooling, heating, and cooling or heating using cold storage or stored heat by simple valve operation. This is what I am trying to do.

The present invention will be described in detail below with reference to Examples.
In Figure 2, 1 is a low-temperature heat storage device filled with a cold storage material that undergoes phase changes at relatively low temperatures and allows heat to enter and exit.
It has a second heat exchanger 2 therein, and 3
is a high-temperature heat storage device filled with a substance that undergoes a phase change at a higher temperature than the low-temperature heat storage device 1;
Furthermore, 5 is a first heat exchanger that exchanges heat with the indoor space. One of the basics of the present invention is that these three heat exchangers 2, 5, and 4 are arranged, that is, the first heat exchanger 5 is directly placed between the second heat exchanger 2 and the third heat exchanger 4. It's about connecting. During cold storage operation, liquid refrigerant flows in from the liquid refrigerant pipe 6, first cools the low temperature heat storage device 1 and stores cold there, and when the cold storage is finished, the liquid refrigerant is unevaporated and becomes the first heat source. The liquid refrigerant flows into the exchanger 5, where it evaporates and automatically cools the room. If the capacity of the first heat exchanger 5 is large enough for the output, the high temperature heat storage device 3 will not be cooled down. On the other hand, during heating operation, the vaporized refrigerant is sent from the vaporized refrigerant pipe 7, and is preferentially condensed in the third heat exchanger 4 in the high temperature heat storage device 3 to store heat. The condensed refrigerant gas is sent to the first heat exchanger 5, where the vaporized refrigerant is condensed and automatically shifts to room heating.

Next, another embodiment of the invention will be described in detail with reference to FIGS. 3 and 4. A first valve 8 is provided at the connection between the low-temperature heat storage device 1 and the first heat exchanger 5, and a second valve 9 is provided at the connection between the first heat exchanger 5 and the third heat exchanger 4. A first bypass line 10 that bypasses the first heat exchanger 5 and the third heat exchanger 4 is provided via a third valve 11, and also bypasses the first heat exchanger 5 and the second heat exchanger 2. A bypass pipe line 12 is provided via a fourth valve 13, and a sixth valve 14 is provided in the liquid refrigerant line 6, and a seventh valve 15 is provided in the vaporized refrigerant line 7.
Therefore, the first and second bypass pipes 10 and 12 are closed by the third and fourth valves 11 and 13, and the first and second bypass pipes 10 and 12 are closed by the third and fourth valves 11 and 13.
If the second valves 8 and 9 are opened, the cold storage, cooling, or heat storage and heating operations described above can be carried out without any change.

In addition, when you want to perform cooling or heating operation during cold storage or heat storage operation, if you close the first and second valves 8 and 9 and open the third and fourth valves 11 and 13, the liquid refrigerant or vaporized refrigerant will be directly supplied. Since it flows into the first heat exchanger 5, it is directly vaporized or condensed there, and the indoor space can be easily cooled or heated.

Next, when you want to release the cold heat stored in the low temperature heat storage device into the room, the sixth, second and third valves 14,
Close 9 and 11. At this time, since a certain amount of refrigerant is required in the second and first heat exchangers 2 and 5, it is sufficient to close the second and third valves 9 and 11, wait a certain period of time, and then close the valve 14. . Next, the first and fourth
Open valves 8 and 13. In this way, since the temperature of the second heat exchanger 2 is lower than that of the first heat exchanger 5, the refrigerant inside the closed circuit condenses in the second heat exchanger 2 and flows down according to gravity to the first heat exchanger. Evaporates at 5. The vaporized refrigerant enters the second heat exchanger 2 again via the second bypass line 12 and is condensed. This circulation continues until the temperatures of the second and first heat exchangers 2, 5 are the same. That is, the refrigerant circulates until the cold heat stored in the low temperature heat storage device 1 is released. On the other hand, when utilizing the heat stored in the high temperature heat storage device 3, the seventh, first and fourth valves 15, 8 and 13 are similarly closed and the second and third valves 9 and 11 are opened. This time, in the third and first heat exchangers 4 and 5, the temperature of the first heat exchanger 5 is lower, so the vaporized refrigerant condenses in the first heat exchanger 5 and flows down according to gravity to the third heat exchanger. Vessel 4
, where it is heated and evaporated, passes through the first bypass line 10 , and condenses again in the first heat exchanger 5 . In this way, the refrigerant circulates and releases heat until the stored heat is exhausted. In this embodiment, it is of course possible to use the first and third valves 8 and 11 and the second and fourth valves 9 and 13 as switching valves. Note that FIG. 4 is a diagram showing the relationship between the opening and closing of the valve and the operation of the device in FIG. 3.

Still other embodiments of the present invention are shown in FIGS. 5 and 6.
This will be explained using figures. In this case, the following three points differ from the embodiment shown in FIG. In place of the first and second bypass lines 10 and 12 and the third and fourth valves 11 and 13 provided therein, a second bypass line 16 and a fourth valve 17 are installed. The third bypass pipe 18 and the fifth valve 19 are provided from the first valve 8 side of the heat exchanger 5 to the liquid refrigerant pipe line 6 side of the second heat exchanger 2. 5 from the second valve 9 side of the third heat exchanger 4 to the vaporized refrigerant pipe 7 side, and the liquid refrigerant pipe 6 from the second heat exchanger side of the sixth valve 14 of the liquid refrigerant pipe 6. The first bypass line 20 is provided on the third heat exchanger side of the seventh valve 15 of the line 7, and the third valve 21 is provided therebetween. Fourth,
If you close the fifth and third valves 17, 19, and 21 and open the sixth, seventh, first, and second valves 14, 15, 8, and 9, the basic operation described at the beginning in Fig. 3 will be performed. No changes. Also, as shown in FIG. 5, the first, second and third valves 8, 9 and 21 are closed, the fourth and fifth valves 17 and 19 are opened, and the sixth and seventh valves 14 and 15 are opened. This is similar to the example shown in FIG. 3 in that cold storage or heat storage can be switched to normal cooling or heating during cooling or heating operation.

Next, when extracting cold heat stored in the low-temperature heat storage device 1 to perform air conditioning, the sixth, seventh, second, and fourth valves 14, 15, 9, and 17 are closed, and the first and fifth valves are closed. , by opening the third valves 8, 19, and 21, the second heat exchanger 2, the first valve 8, the first heat exchanger 5, the third bypass line 18, the fifth valve 19, and the A closed circuit including one bypass pipe 20 and a third valve 21 is formed. The refrigerant is condensed in the second heat exchanger 2, and the liquefied refrigerant flows down according to gravity and evaporates in the first heat exchanger 5, thereby releasing the stored cold heat into the room. On the other hand, when using the heat stored in the high temperature heat storage device 3, the sixth, seventh, first, and fifth valves 1
4, 15, 8, 19 and open the second, fourth, third valves 9, 17, 21, the first heat exchanger 5, the second
valve 9, third heat exchanger 4, first bypass line 2
0, the third valve 21, the fourth valve 17, and the second bypass line 16 form a closed circuit, so the refrigerant condenses in the first heat exchanger 5 and evaporates in the third heat exchanger 4. The occurrence of circulation is almost similar to the above-mentioned cooling.

Note that in this embodiment, the first valve 8 and the fourth valve 1
7. It is naturally possible to use the second valve 9 and the fifth valve 19, the third valve 21 and the sixth valve 14, or the seventh valve 15 as switching valves.

As detailed above, the present invention includes a first heat exchanger that cools or heats an air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a heat storage material that undergoes a phase change at a relatively low temperature and allows heat to enter and exit. A low-temperature heat storage device has a second heat exchanger inside the container, and a high-temperature heat storage device has a third heat exchanger in which the container is filled with a heat storage material that undergoes a phase change at higher temperatures and allows heat to flow in and out. The first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger, and when the liquid refrigerant is flowing, the first heat is transferred from the second heat exchanger to the first heat exchanger. When the vaporized refrigerant is flowing, it is moved from the third heat exchanger to the first heat exchanger and towards the second heat exchanger, so that the refrigerant can be stored. It has many practical advantages in that it can add the function of extracting stored heat to the functions of heat storage and normal cooling and heating.

According to the second invention, the air-conditioned space is filled with a first heat exchanger that cools or heats by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a heat storage material that undergoes a phase change at a relatively low temperature and allows heat to enter and exit. A low-temperature heat storage device has a second heat exchanger inside the container, and a high-temperature heat storage device has a third heat exchanger in which the container is filled with a heat storage material that undergoes a phase change at higher temperatures and allows heat to flow in and out. The first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger, and the first heat exchanger is connected in series between the second heat exchanger and the first heat exchanger, and Said third
A first valve and a second valve are provided between the heat exchanger and the first heat exchanger, respectively, and from between the first valve and the first heat exchanger, the first heat exchanger and A first bypass line that bypasses the third heat exchanger is provided between the second valve and the first heat exchanger, and a second bypass line that bypasses the first heat exchanger and the second heat exchanger. A bypass pipe is provided, and a third valve and a fourth valve for opening and closing the first bypass pipe and the second bypass pipe, respectively, are provided in the pipe, and during cold storage, the third valve, Close the fourth valve and supply the liquid refrigerant to the second valve.
The refrigerant is transferred from the heat exchanger through the first heat exchanger to the third heat exchanger, the third valve and the fourth valve are closed during heat storage, and the vaporized refrigerant is transferred from the third heat exchanger to the first heat exchanger. The first valve and the second valve are closed during cooling, and the liquid refrigerant is transferred from the second bypass pipe through the first heat exchanger to the first bypass pipe. During heating, the first valve and the second valve are closed, and the vaporized refrigerant is moved from the first bypass line to the second bypass line through the first heat exchanger, so the temperature is low. Even during cold storage or heat storage in a high-temperature heat storage device or a high-temperature heat storage device, the liquid refrigerant or vaporized refrigerant is directly transferred to the first heat exchanger without passing the liquid refrigerant or vaporized refrigerant to the low-temperature heat storage device or the high-temperature heat storage device. It is possible to cool or heat the air space by transmitting the heat stored in the low-temperature heat storage device or the high-temperature heat storage device, which is completely independent of the air conditioner, and eliminates the need for the high-temperature heat storage device. Alternatively, the heat can be taken out to the first heat exchanger to cool and heat the room without circulating the low-temperature heat storage device.

Furthermore, according to a third aspect of the present invention, there is provided a first heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a heat storage material that undergoes a phase change at a relatively low temperature and allows heat to enter and exit. A low-temperature heat storage device with a second heat exchanger in a filled container, and a high-temperature heat storage device with a third heat exchanger in which the container is filled with a heat storage material that undergoes a phase change at higher temperatures and allows heat to flow in and out. the first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger,
providing a first bypass pipe line that bypasses the second heat exchanger, the first heat exchanger, and the third heat exchanger;
A third valve for opening and closing the first bypass pipeline is provided in the pipeline, a second bypass pipeline is provided for bypassing the second heat exchanger and the first valve, and a second bypass pipeline is provided for bypassing the second heat exchanger and the first valve.
A fourth valve for opening and closing the bypass pipe is provided in the pipe, a third bypass pipe for bypassing the third heat exchanger and the second valve is provided, and the third bypass pipe is A fifth valve that opens and closes is provided in the pipe, and during cold storage, the second valve, the third valve, and the fourth valve are closed, and the liquid refrigerant is transferred from the second heat exchanger to the first heat exchanger. The first valve, the third valve, and the fifth valve are closed during heat storage, and the vaporized refrigerant is transferred from the third heat exchanger through the first heat exchanger to the second heat exchanger. During cooling, the first valve, the second valve, and the third valve are closed, and the liquid refrigerant is transferred from the second bypass pipe to the first bypass pipe.
passing through a heat exchanger to a third bypass line;
During heating, the first valve, the second valve, and the second valve are closed, and the vaporized refrigerant is moved from the third bypass line through the first heat exchanger to the second bypass line, and the a sixth valve in the liquid refrigerant pipe leading to the second heat exchanger and the second bypass;
A seventh valve is provided in the vaporized refrigerant pipe leading to the heat exchanger and the third bypass, and during cooling by cold storage, the second valve, fourth valve, sixth valve, and seventh valve are closed and the refrigerant is turned off. The second heat exchanger, the first heat exchanger, the third bypass pipe, and the first bypass pipe are circulated, and the first valve, the fifth valve, and the sixth valve are operated during heating by heat storage. , the seventh valve is closed and the refrigerant is circulated through the third heat exchanger and the first heat exchanger, and the second bypass pipe and the first bypass pipe, so it is similar to the second invention. Unlike the first and second inventions, there is no need to unnecessarily circulate the refrigerant to a high-temperature heat storage device or a low-temperature heat storage device. The effect can be achieved without passing through an unnecessary high-temperature heat storage device or low-temperature heat storage device.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a conventional example of a combination of a regenerator and an indoor heat exchanger, Fig. 2 is an explanatory diagram showing an embodiment of the first invention, and Fig. 3 is an explanatory diagram of an embodiment of the second invention. 4 is an explanatory diagram showing the relationship between the opening and closing of the valve in FIG. 3 and its operation. FIG. 5 is an explanatory diagram of an embodiment of the third invention. FIG. FIG. 1...Low temperature heat storage device, 2...Second heat exchanger, 3
...High temperature heat storage device, 4...Third heat exchanger, 5...
First heat exchanger, 8, 9, 11, 13, 15, 1
7, 19, 21... Valve, 10, 12, 16, 1
8, 20...Bypass pipeline.

Claims (1)

[Scope of Claims] 1. A first heat exchanger that cools or heats an air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a heat storage material that undergoes a phase change at a relatively low temperature and allows heat to enter and exit. A low-temperature heat storage device with a second heat exchanger provided in the container, and a high-temperature heat storage device with a third heat exchanger in which the container is filled with a heat storage material that undergoes a phase change at higher temperatures and allows heat to flow in and out. The first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger, and when the liquid refrigerant is flowing, the first heat exchanger is connected from the second heat exchanger to the first heat exchanger. The heat storage cold storage type is configured such that the refrigerant is moved from the third heat exchanger through the first heat exchanger to the second heat exchanger when the vaporized refrigerant is flowing. Air conditioner. 2. A first heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a second heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a second heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant. It has a low-temperature heat storage device provided with an exchanger, and a high-temperature heat storage device provided with a third heat exchanger in which a container is filled with a heat storage material that undergoes a phase change at a higher temperature than the third heat storage device, and heat is transferred in and out. The first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger, and the first heat exchanger is connected in series between the second heat exchanger and the first heat exchanger and between the third heat exchanger and the third heat exchanger. a first valve and a second valve are each provided between the first heat exchanger;
A first bypass line is provided between the first valve and the first heat exchanger to bypass the first heat exchanger and the third heat exchanger, and the first bypass line is provided between the second valve and the first heat exchanger.
A second bypass pipe is provided between the heat exchanger and the first heat exchanger and the second heat exchanger, and a second bypass pipe is provided to open and close the first bypass pipe and the second bypass pipe, respectively. A third valve and a fourth valve are respectively provided in the same pipe, and during cold storage, the third valve and the fourth valve are closed, and the liquid refrigerant is passed from the second heat exchanger through the first heat exchanger to the second heat exchanger. 3 heat exchanger, close the third valve and fourth valve during heat storage, and move the vaporized refrigerant from the third heat exchanger through the first heat exchanger to the second heat exchanger for cooling. At times, the first valve and the second valve are closed, and the liquid refrigerant is moved from the second bypass line through the first heat exchanger through the first bypass line, and during heating, the first valve, close the second valve;
A heat storage and cold storage type air conditioner configured to move vaporized refrigerant from the first bypass pipe through the first heat exchanger to the second bypass pipe. 3 A first heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant, and a second heat exchanger that cools or heats the air-conditioned space by evaporating a liquefied refrigerant or condensing a vaporized refrigerant; It has a low-temperature heat storage device provided with an exchanger, and a high-temperature heat storage device provided with a third heat exchanger in which a container is filled with a heat storage material that undergoes a phase change at a higher temperature than the third heat storage device, and heat is transferred in and out. The first heat exchanger is connected in series between the second heat exchanger and the third heat exchanger, and the first heat exchanger is connected in series between the second heat exchanger and the first heat exchanger and between the third heat exchanger and the third heat exchanger. a first valve and a second valve are each provided between the first heat exchanger;
providing a first bypass pipe line that bypasses the second heat exchanger, the first heat exchanger, and the third heat exchanger;
A third valve for opening and closing the first bypass pipeline is provided in the pipeline, a second bypass pipeline is provided for bypassing the first valve of the second heat exchanger, and a second bypass pipeline is provided for bypassing the first valve of the second heat exchanger.
A fourth valve for opening and closing the bypass pipe is provided in the pipe, a third bypass pipe for bypassing the third heat exchanger and the second valve is provided, and the third bypass pipe is A fifth valve that opens and closes is provided in the same pipe, and during heat storage, the second valve, third valve, and fourth valve are closed, and the liquid refrigerant is transferred from the second heat exchanger to the first heat exchanger. The first valve, the third valve, and the fifth valve are closed during heat storage, and the vaporized refrigerant is transferred from the third heat exchanger through the first heat exchanger to the second heat exchanger. During cooling, the first valve, second valve and third valve are closed, and the liquid refrigerant is transferred from the second bypass pipe through the first heat exchanger to the third bypass pipe. The first valve, the second valve, and the third valve are closed during heating, and the vaporized refrigerant is transferred from the third bypass pipe through the first heat exchanger to the second bypass pipe. A sixth valve is provided in the liquid refrigerant pipe connected to the second heat exchanger and the second bypass, and a sixth valve is provided in the liquid refrigerant pipe connected to the second heat exchanger and the second bypass.
A seventh valve is provided in the vaporized refrigerant pipe leading to the heat exchanger and the third bypass, and during cooling by cold storage, the second valve, fourth valve, sixth valve, and seventh valve are closed and the refrigerant is turned off. The second heat exchanger, the first heat exchanger, the third bypass pipe, and the first bypass pipe are circulated, and the first valve, the fifth valve, and the sixth valve are operated during heating by heat storage. , a heat storage and cold storage type air conditioner configured to close a seventh valve and circulate the refrigerant through the third heat exchanger, the first heat exchanger, the second bypass pipe line, and the first bypass pipe line. .