JPH05126424A - Apparatus for cooling/heating many rooms - Google Patents

Abstract

PURPOSE:To eliminate a heat-releasing heat exchanger from the use in a heat storage tank so as to reduce the refrigerant in a user side refrigerant cycle in quantity and prevent liquefied refrigerant from staying stagnant in the heat- releasing heat exchanger and also prevent damage to a refrigerant-conveying device caused by an influx of liquid into it. CONSTITUTION:In a user side refrigerant cycle a first heat-releasing auxiliary heat exchanger 30 is provided in parallel with a second auxiliary heat exchanger 19. This first heat-releasing auxiliary heat exchanger 30 is joined in one structure to a second heat-releasing auxiliary heat exchanger 31 for the heat exchange between the two. A heat-releasing circuit 33 is formed in a loop by connecting therein the second heat-releasing auxiliary heat exchanger 31, a heat-storing material conveyance device 32, and a heat storage tank 23 containing a heat-storing heat exchanger 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-chamber cooling / heating apparatus which is separated into a heat source side refrigerant cycle and a use side refrigerant cycle, and more particularly to a heat storage system.

[0002]

2. Description of the Related Art Conventionally, a heat storage refrigerant cycle of a multi-chamber cooling and heating apparatus, which is separated into a heat source side refrigerant cycle and a use side refrigerant cycle, is shown in JP-A-3-144236, and is constructed as shown in FIG. It was

A description will be given below with reference to the drawings. In FIG. 3, 11 is a compressor, 12 is a four-way valve, 13 is a heat source side heat exchanger, 14 is a cooling decompression device, 15 is a heating decompression device, and 16 is a heating cooling decompression device 14. A stop valve, 17 is a check valve that closes the pressure reducing device 15 for heating during cooling, and 18 is a first auxiliary heat exchanger that connects them in an annular shape.
A heat source side refrigerant cycle is formed.

A second auxiliary heat exchanger 19 is integrally formed with the first auxiliary heat exchanger 18 so as to exchange heat with the first auxiliary heat exchanger 18. 20
Uses a refrigerant amount adjustment tank to adjust the amount of refrigerant during cooling and heating. Reference numeral 21 denotes a refrigerant transporting device, which has a reversible characteristic that the refrigerant flows out in the opposite directions during cooling and heating, and these are housed in the outdoor unit f. 22a and 22b are utilization side heat exchangers housed in the indoor units g and h, and connected to the outdoor unit f by connecting pipes i, i ', j and j'.

The second auxiliary heat exchanger 19, the refrigerant amount adjusting tank 20, the refrigerant transfer device 21, and the use side heat exchangers 22a, 22.
b and the connecting pipes i, i ′, j, j ′ are connected in a ring shape to form a utilization side refrigerant cycle.

Reference numeral 23 denotes a heat storage tank, which is filled with a heat storage material such as water and exchanges heat with the heat storage material to store heat and a heat storage heat exchanger 24 which also exchanges heat with the heat storage material to radiate the stored heat. The exchange 2f is provided.

26a and 26b are three-way switching valves for switching the flow rates of the refrigerant to the first auxiliary heat exchanger 18 and the heat storage heat exchanger 24, and 27a and 27b are to the second auxiliary heat exchanger 19 and the heat radiating heat exchanger 25. Is a three-way flow valve that adjusts the refrigerant flow rate.

The operation of the multi-room cooling and heating apparatus configured as described above will be described. During the cooling operation, the refrigerant cycle is shown by the solid line arrow in the figure. In the heat source side refrigerant cycle, the high temperature and high pressure gas from the compressor 11 passes through the four-way valve 12 and radiates heat in the heat source side heat exchanger 13 to be condensed and liquefied. The pressure is reduced by the cooling expansion valve 14 through the first auxiliary heat exchanger 18.
And is circulated to the compressor 12 through the four-way valve 12.

At this time, the second auxiliary heat exchanger 19 and the first auxiliary heat exchanger 18 of the utilization side refrigerant cycle exchange heat, the gas refrigerant in the utilization side refrigerant cycle is cooled and liquefied, and the refrigerant amount adjusting tank. 20 is sent to the refrigerant transfer device 21 and is sent to the utilization side heat exchangers 22a and 22b by the refrigerant transfer device 21 through the connection pipes i and j to undergo endothermic evaporation and gasification to form the connection pipe i ′, It is circulated to the second auxiliary heat exchanger 19 through j '.

In the heat storage operation of the heat source side refrigerant cycle during cooling,
The cooling expansion valve 14 serves as a heat storage expansion valve, and the compressor 11,
The refrigerant from the four-way valve 12, the heat source side heat exchanger 13, and the check valve 16 passes through the heat storage expansion valve 14, passes through the three-way switching valve 26a, and flows into the heat storage heat exchanger 24 to exchange heat with the heat storage material. It is endothermicly evaporated and circulates from the four-way valve 12 to the compressor 11 through the three-way switching valve 26b.

On the other hand, during the cooling peak load operation of the use side refrigerant cycle, the heat source side refrigerant cycle is the first auxiliary heat exchanger 1.
In the normal cooling operation using 8 as the evaporator, the refrigerant from the use side heat exchangers 22a, 22b passes through the connecting pipes i ', j', and a part of the refrigerant adjusted according to the load is a three-way flow valve 27a. Is sent to the heat radiating heat exchanger 25, cooled and condensed by the heat storage material at about 0 ° C., liquefied, and sent to the three-way flow valve 27b.

The remaining refrigerant, which is adjusted to the load by the three-way flow valve 27a passing through the connecting pipes i'and j ', flows from the three-way flow valve 27a to the second auxiliary heat exchanger 19, and the first auxiliary heat exchanger 19
The three-way flow valve 27 is cooled and liquefied by the auxiliary heat exchanger 18.
It is sent to b and merges with the refrigerant from the heat radiating heat exchanger 25, and circulates from the refrigerant amount adjustment tank 20 to the refrigerant transfer device 21.
Therefore, at this time, the cooling capacity of the utilization side cycle is increased by the sum of the capacity of the heat source side refrigerant cycle and the capacity of the heat radiation heat exchanger 25.

On the other hand, during the heating operation, the refrigerant cycle is shown by the broken line arrow, and in the refrigerant cycle on the heat source side, the high-temperature high-pressure refrigerant from the compressor 11 is sent from the four-way valve 12 to the first auxiliary heat exchanger 18, Release heat to condense and liquefy, and check valve 1
The pressure is reduced from 7 by the pressure reducing device 15 for heating, and the heat source side heat exchanger 1
It is endothermically evaporated at 3, and circulates through the four-way valve 12 to the compressor 11.

At this time, the second auxiliary heat exchanger 19 and the first auxiliary heat exchanger 18 of the utilization side refrigerant cycle exchange heat, the liquid refrigerant in the utilization side refrigerant cycle is heated and gasified, and the connecting pipe i ', It is sent to the use side heat exchanger 22 through j ′, is heated and radiates and liquefies, and is sent to the refrigerant transfer device 21 through the connection pipes i and j, and is sent from the refrigerant amount adjusting tank 20 to the second auxiliary heat exchanger. Cycle to 19.

In the heat storage operation of the heat source side refrigerant cycle during heating, the refrigerant from the compressor 11 and the four-way valve 12 is a three-way switching valve 2.
6b is sent to the heat storage heat exchanger 24, cooled and condensed by the heat storage material, liquefied, depressurized by the heating expansion valve 15 through the three-way switching valve 26a, the check valve 17, and absorbed by the heat source side heat exchanger 13. Evaporate and circulate from the four-way valve 12 to the compressor 11.

On the other hand, during the heating peak load operation of the utilization side refrigerant cycle, the heat source side refrigerant cycle is controlled by the three-way switching valves 26a, 26b.
6b is switched to perform a normal heating operation using the first auxiliary heat exchanger 18 as a condenser. At this time, the utilization side heat exchangers 22a, 22
The refrigerant heat-dissipated and condensed in b is sent to the three-way flow valve 27b through the connection pipes i and j, the refrigerant transfer device 21 and the refrigerant amount adjusting tank 20. In the three-way flow valve 27b, a part of the refrigerant is sent to the heat radiating heat exchanger 25 to be heated and gasified by the heat storage material, and the remaining refrigerant is sent to the second auxiliary heat exchanger 19 in accordance with the load. 1 Auxiliary heat exchanger 18 heats and gasifies, respective three-way flow valves 27a merge the respective gas refrigerants, and the utilization side heat exchanger 22 passes through the connecting pipes i ′ and j ′.
a, 22b.

Therefore, at this time, the heating capacity of the refrigerant cycle on the utilization side increases as the sum of the heating capacity of the refrigerant cycle on the heat source side and the capacity of the heat radiating heat exchanger 25.

[0018]

However, in the above-mentioned structure, the heat radiating heat exchanger 25 has a large internal volume, the refrigerant in the use side refrigerant cycle increases, and a large amount of heat is radiated in the heat radiating heat exchanger 25. There is a problem in that the refrigerant stagnate in the refrigerant, the load on the refrigerant carrier device 11 increases during the heat storage utilization operation, and a large amount of the liquefied refrigerant in the heat radiating heat exchanger 25 flows into the refrigerant carrier device 11 and is damaged by liquid compression.

Further, if the temperature of the heat storage material in the heat storage tank 23 is higher than that of the refrigerant in the use side refrigerant cycle in cooling and lower in heating, the capacity improvement by the heat storage material cannot be obtained.
There was a problem that the temperature range used for the heat storage material was small.

In view of the above problems, the multi-chamber cooling and heating apparatus of the present invention reduces the amount of refrigerant in the refrigerant cycle on the use side, reduces the load on the refrigerant carrier device due to liquefied refrigerant, and prevents damage to the refrigerant carrier device due to liquid compression. To do.

In addition to the above-mentioned object, the temperature range of the heat storage material is expanded to increase the energy saving by effectively using the heat storage.

[0022]

In order to solve the above-mentioned problems, a multi-room air conditioner of the present invention comprises a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device and a first auxiliary heat exchanger. A heat source side refrigerant cycle which is connected in an annular shape, a second auxiliary heat exchanger which is integrally formed with the first auxiliary heat exchanger and exchanges heat, a refrigerant transfer device and a plurality of utilization side heat exchangers, 2 Utilization-side refrigerant cycle having a first auxiliary heat exchanger for heat dissipation in parallel with the auxiliary heat exchanger, a heat storage heat exchanger in parallel with the first auxiliary heat exchanger, and the first auxiliary heat exchanger for heat dissipation A second auxiliary heat exchanger for heat radiation that is integrally formed with the second heat exchanger, and a heat radiation circuit in which a heat storage tank having the second auxiliary heat exchanger for heat radiation, the heat storage material transfer device, and the heat exchanger for heat storage is annularly connected. Is equipped with.

Further, a heat source side refrigerant cycle formed by connecting a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device and a first auxiliary heat exchanger in an annular shape, and the first auxiliary heat exchanger. A second auxiliary heat exchanger for forming and exchanging heat, a refrigerant transfer device and a plurality of user side heat exchangers, and a user side refrigerant having a first heat radiating auxiliary heat exchanger in parallel with the second auxiliary heat exchanger. A cycle, a heat storage heat exchanger in parallel with the first auxiliary heat exchanger, a heat source side heat radiating heat exchanger between the heat source side heat exchanger and the pressure reducing device, and the radiating first auxiliary heat exchanger. A second auxiliary heat exchanger for heat radiation that is integrally formed and exchanges heat, and the second heat radiation second auxiliary
A heat radiation circuit is provided in which a heat storage tank having an auxiliary heat exchanger, a heat storage material conveying device, and the heat storage heat exchanger and a heat source side heat radiation heat exchanger is annularly connected.

[0024]

In the multi-chamber cooling and heating apparatus of the present invention, the heat dissipation heat exchanger in the heat storage tank is eliminated by the above-described structure, so that the amount of refrigerant in the use side refrigerant cycle can be reduced and the heat dissipation heat exchanger Liquefaction retention of the refrigerant is eliminated.

Further, the temperature of the heat storage material can be higher than that of the use side refrigerant cycle during cooling and lower than that during heating.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-room air conditioner according to a first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refrigerant cycle of a multi-room cooling and heating system according to the first embodiment of the present invention.

In FIG. 1, 30 is a second auxiliary heat exchanger 1
A first auxiliary heat exchanger for heat radiation provided in series with 9 to radiate the stored heat to the use side refrigerant cycle; a second auxiliary heat exchanger for heat radiation 31 for exchanging heat with the first auxiliary heat exchanger for heat radiation 32;
From the second auxiliary heat exchanger 31 for heat dissipation to the heat storage tank 23
A heat storage material transfer device that circulates to 33 is a heat dissipation circuit that connects the second auxiliary heat exchanger 31 for heat dissipation, the heat storage material transfer device 32, and the heat storage tank 23, and other configurations are the same as the conventional example,
Here, the same reference numerals are used and the description thereof is omitted.

The operation of this refrigerant cycle is also the same as that of the conventional example and a detailed description thereof will be omitted, but the heat storage utilization operation of the utilization side refrigerant cycle different from the conventional example will be described below.

In FIG. 1, during the peak load operation of cooling and heating, the heat storage material conveying device 3 is operated along with the operation of the utilization side refrigerant cycle.
2 is operated to cool or heat the second auxiliary heat exchanger 31 for heat dissipation, and the first auxiliary heat exchanger 30 for heat dissipation adds heat to the capacity of the heat source side refrigerant cycle to increase the capacity of the user side refrigerant cycle. Let

As described above, according to this embodiment, the heat radiation for heat exchange by integrally forming the heat storage heat exchanger 24 and the heat radiation first auxiliary heat exchanger 30 in parallel with the first auxiliary heat exchanger 18. The second auxiliary heat exchanger 31 for heat dissipation, the heat dissipation tank 33 having the second auxiliary heat exchanger 31 for heat dissipation, the heat storage material conveying device 32, and the heat exchanger 24 for heat storage are annularly connected, so that the heat dissipation circuit 33 is provided. By storing heat at night, heat is added to the capacity of the heat source side refrigerant cycle at the time of peak load during cooling and heating, and it is possible to cope with the peak load.

Therefore, the capacity of the compressor 11 can be reduced and the equipment capacity can be reduced. In addition, it is possible to reduce the amount of the refrigerant in the utilization side refrigerant cycle and to eliminate the liquid compression due to the inflow of a large amount of the liquefied refrigerant into the refrigerant carrier device 21 and prevent the refrigerant carrier device 21 from being damaged.

Next, the second multi-chamber cooling and heating apparatus according to the present invention
Embodiment will be described with reference to the drawings, but the same reference numerals will be given to portions having the same configurations as those in the first embodiment, and detailed description thereof will be omitted.

In FIG. 2, 34 is a heat source side heat radiation heat exchanger provided in the heat storage tank 23, 35a and 35b are three-way switching valves for switching the refrigerant flow to the heat source side heat radiation heat exchanger 34, and others. The configuration of is the same as that of the conventional example and the first example, and is shown here by using the same reference numeral, and the description thereof is omitted.

The operation of this refrigerant cycle is also the same as that of the conventional example and the first embodiment, and detailed description thereof will be omitted. However, the heat storage utilization operation different from the conventional example and the first embodiment will be described below. To do.

In FIG. 2, when the temperature of the heat storage material is higher than the temperature of the refrigerant in the use side refrigerant cycle during the peak load operation of cooling and heating, the heat storage material transfer device 32 is operated along with the operation of the use side refrigerant cycle to release heat. Second auxiliary heat exchanger 31
Is cooled or heated, and heat is added to the capacity of the heat source side refrigerant cycle by the first heat dissipation auxiliary heat exchanger 30 to increase the capacity of the utilization side refrigerant cycle.

The first auxiliary heat exchanger 30 for heat dissipation is the second
Since it is provided in parallel with the auxiliary heat exchanger 19, the adjustment range of the heat storage amount added to the utilization side refrigerant cycle becomes large by adjusting the opening degree of the three-way flow valves 27a and 27b.

When the temperature of the heat storage material is lower than the temperature of the refrigerant in the use side refrigerant cycle, the heat storage material transfer device 32 is stopped and the three-way switching valves 35a and 35b are operated to radiate the heat on the heat source side. The refrigerant in the heat source side refrigerant cycle is circulated to the. At this time, in cooling, the degree of refrigerant supercooling of the heat source side refrigerant cycle increases, the capacity of the heat source side refrigerant cycle increases, and the capacity of the utilization side refrigerant cycle also increases.

For heating, the heat exchanger 34 for radiating heat on the heat source side is also used.
Becomes an evaporator, and the capacity of the heat source side refrigerant cycle is improved by increasing the evaporation capacity, and the capacity of the utilization side refrigerant cycle is also increased.

As described above, according to the present embodiment, the heat source side heat exchanger 24 is disposed in parallel with the first auxiliary heat exchanger 18, and the heat source side heat exchanger 13 and the pressure reducing devices 14 and 15 radiate heat. Heat exchanger 34, second heat-radiating first auxiliary heat exchanger 30, which is integrally formed with the second heat-radiating auxiliary heat exchanger 31, heat-radiating second auxiliary heat exchanger 31, and heat storage material conveying device 32. Since the heat storage tank 23 having the heat storage heat exchanger 24 and the heat source side heat radiation heat exchanger 34 is connected in a ring shape to the heat radiation circuit 33, the heat is stored at night so that the peak load during cooling and heating can be achieved. Since heat can be added to the capacity of the heat source side refrigerant cycle to handle the peak load, the capacity of the compressor 11 can be made small and the equipment capacity can be made small.

Further, it is possible to reduce the amount of the refrigerant in the use side refrigerant cycle, and to eliminate the liquid compression due to the inflow of a large amount of the liquefied refrigerant into the refrigerant carrier device 21, and prevent the refrigerant carrier device 21 from being damaged. it can. Further, since the heat-source-side heat-dissipating heat exchanger 34 is provided, even if the refrigerant temperature of the use-side refrigerant cycle is higher than the temperature of the heat storage material in cooling and lower in heating and the stored heat cannot be used directly, the heat-source-side refrigerant cycle It is possible to improve the capacity of the refrigerant and increase the capacity of the refrigerant cycle on the utilization side. Therefore, the utilization range of the heat storage temperature can be expanded.

In the present embodiment, the use of heat storage by operating the heat source side refrigerant cycle has been described. However, in some cases, the heat source side refrigerant cycle is not operated, and only the heat storage cooling / heating operation is possible. It goes without saying that the rise characteristics are improved by using it.
Further, although the outdoor unit including the heat storage tank is used in the embodiment, the heat storage tank may be separated from the outdoor unit.

[0043]

As described above, the multi-room cooling and heating apparatus of the present invention is a heat source in which a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device and a first auxiliary heat exchanger are connected in an annular shape. Side refrigerant cycle, a second auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to perform heat exchange, a refrigerant transfer device and a plurality of utilization side heat exchangers, and the second auxiliary heat exchanger in series And a heat exchange for storing heat in parallel with the first auxiliary heat exchanger and a first auxiliary heat exchanger for heat dissipation. The second auxiliary heat exchanger for heat dissipation, the second auxiliary heat exchanger for heat dissipation, the heat storage material conveying device, and a heat dissipation circuit in which a heat storage tank having the heat exchanger for heat storage are annularly connected.

As a result, by storing heat at night, heat is added to the capacity of the heat source side refrigerant cycle at the time of peak load during cooling and heating, and it is possible to cope with the peak load. Therefore, the capacity of the compressor can be reduced and the equipment capacity can be reduced. In addition, it is possible to reduce the amount of the refrigerant in the utilization side refrigerant cycle and to eliminate the liquid compression due to the inflow of a large amount of the liquefied refrigerant into the refrigerant carrier device, and prevent the refrigerant carrier device from being damaged.

Since the first auxiliary heat exchanger for heat radiation is provided in parallel with the second auxiliary heat exchanger, the adjustment range of the heat storage amount added to the use side refrigerant cycle can be adjusted by adjusting the opening degree of the three-way flow valve. growing.

Further, since the heat-source-side heat-dissipating heat exchanger is provided, even if the refrigerant temperature of the use-side refrigerant cycle is higher than that of the heat storage material in cooling and lower in heating and the heat cannot be directly used, It is possible to improve the capacity of the heat source side refrigerant cycle and increase the capacity of the utilization side refrigerant cycle. Therefore, since the utilization range of the heat storage temperature can be expanded, it is possible to further save energy.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram of a multi-room cooling and heating apparatus according to a first embodiment of the present invention.

FIG. 2 is a refrigeration cycle diagram of a multi-room air conditioner according to a second embodiment of the present invention.

FIG. 3 is a refrigeration cycle diagram of a conventional multi-room air conditioner

[Explanation of symbols]

 13 Heat Source Side Heat Exchanger 18 First Auxiliary Heat Exchanger 19 Second Auxiliary Heat Exchanger 21 Refrigerant Transfer Device 22a, 22b User Side Heat Exchanger 23 Heat Storage Tank 24 Heat Storage Heat Exchanger 30 Radiation First Auxiliary Heat Exchanger 31 Heat Dissipation Second Auxiliary Heat Exchanger 32 Heat Storage Material Transfer Device 33 Radiation Circuit 34 Heat Source Side Radiation Heat Exchanger

Claims (2)

[Claims] 1. A heat source side refrigerant cycle comprising a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger connected in an annular shape, and the first auxiliary heat exchanger. A second auxiliary heat exchanger for forming and exchanging heat, a refrigerant transfer device and a plurality of user side heat exchangers, and a user side refrigerant having a first heat radiating auxiliary heat exchanger in parallel with the second auxiliary heat exchanger. A cycle, a heat storage heat exchanger in parallel with the first auxiliary heat exchanger, a second heat dissipation second auxiliary heat exchanger integrally formed with the heat dissipation first auxiliary heat exchanger, and the heat dissipation A multi-chamber cooling and heating device including a heat dissipation circuit in which a second auxiliary heat exchanger, a heat storage material conveying device, and a heat storage tank having the heat storage heat exchanger are connected in an annular shape. 2. A heat source side refrigerant cycle comprising a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device and a first auxiliary heat exchanger connected in an annular shape, and the first auxiliary heat exchanger. A second auxiliary heat exchanger for forming and exchanging heat, a refrigerant transfer device and a plurality of user side heat exchangers, and a user side refrigerant having a first heat radiating auxiliary heat exchanger in parallel with the second auxiliary heat exchanger. A cycle, a heat storage heat exchanger in parallel with the first auxiliary heat exchanger, a heat source side heat radiating heat exchanger between the heat source side heat exchanger and the pressure reducing device, and the radiating first auxiliary heat exchanger. Heat storage having a second heat-radiating auxiliary heat exchanger integrally formed and exchanging heat, the second heat-radiating second auxiliary heat exchanger, a heat storage material conveying device, the heat-storage heat exchanger, and a heat-source-side heat-radiating heat exchanger A multi-room cooling and heating system equipped with a heat dissipation circuit that connects the tank with a ring.