JPH1123015A - Heat storage type refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a driving force for the transfer of refrigerant while maintaining a heat storage utilizing efficiency with respect to a refrigerating device utilizing heat storage. SOLUTION: A primary side refrigerant circuit A and a secondary side refrigerant circuit B are connected to a heat storage tank C, in which water is stored. The primary side refrigerant circuit A is constituted of a closed circuit in which a compressor 1, an outdoor heat exchanger 2, an electric motor-operated expansion valve 3 and an ice making heat transfer tube 4 are connected. The secondary side refrigerant circuit B is constituted of a closed circuit, in which a pump 11, an indoor heat exchanger 12, a utilizing side heat transfer tube 13 are connected. Upon utilizing heat storage, cold heat, recovered in the utilizing side heat transfer tube 13 by driving the pump 11, is transferred to the indoor heat exchanger 12 to contribute the same to indoor cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative refrigeration system and, more particularly, to a measure for reducing a circulating driving force required for performing a refrigerant circulating operation utilizing heat storage.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 7-24816
In the air conditioner of the ice heat storage type as disclosed in Japanese Patent Publication No. 8 (KOKAI), ice is stored in a heat storage tank using nighttime electric power, and the cold heat of the ice is used as a cold heat source for daytime cooling. doing. As a result, daytime power consumption is reduced.

[0003] Specifically, there is provided a use-side circuit in which a compressor, an outdoor heat exchanger, a heat storage tank, an expansion valve, and an indoor heat exchanger are connected by a refrigerant circuit. Heat exchange is performed between the refrigerant discharged from the compressor and the cold heat in the heat storage tank, the liquefied refrigerant is decompressed by an expansion valve, and then evaporated by an indoor heat exchanger to cool the room.

[0004] As a form of utilization of the cold heat, there is a method of condensing the discharged gas refrigerant by the cool heat in the heat storage tank (hereinafter referred to as a condensation utilization method), and a method of storing the refrigerant condensed by exchanging heat with the outside air. There is a method of setting a supercooled state by heat (hereinafter referred to as a supercooled method). Hereinafter, each method will be described.

In the condensing method, the refrigerant discharged from the compressor is introduced into a heat storage tank by bypassing an outdoor heat exchanger, and the refrigerant is condensed by the cool heat in the heat storage tank. After the condensed refrigerant is decompressed by the expansion valve, it is evaporated by the indoor heat exchanger. On the other hand, in the supercooling method, the refrigerant discharged from the compressor is condensed by exchanging heat with the outside air in an outdoor heat exchanger, and then introduced into a heat storage tank, where the refrigerant is supercooled by cold heat in the heat storage tank. I do. After the pressure of the supercooled refrigerant is reduced by the expansion valve, the refrigerant is evaporated by the indoor heat exchanger.

[0006]

However, each of the above methods has the following problems. First, in the case of the condensing system, in order to carry the refrigerant and condense the refrigerant, it is necessary to set the discharge pressure of the compressor high and secure a differential pressure in the circuit until a sufficient refrigerant circulation amount is obtained. is there. That is, it is necessary to set the high voltage side of the circuit to be high, so that it is not possible to improve the operation efficiency by reducing the high voltage.

In the case of the supercooling system, since the refrigerant is condensed by the outside air, even if the outside air temperature is high, a relatively large compressor operation is required in order to reliably condense the refrigerant in the outdoor heat exchanger. Power is needed. Therefore, it is not possible to sufficiently meet the demand for reducing power consumption during daytime cooling operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to reduce the driving force for transporting a refrigerant while maintaining the heat storage utilization efficiency of a refrigeration system utilizing heat storage. It is in.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, in the heat storage utilizing circuit utilizing heat storage, the refrigerant is circulated by a conveying means which applies only a driving force for circulating the refrigerant. Specifically, the invention according to claim 1 provides a heat storage refrigeration apparatus including a heat storage tank (C) storing a heat storage medium, and a heat storage utilization circuit (B) that uses heat stored in the heat storage medium. It is assumed. A heat storage heat exchange unit (4) housed in the heat storage tank (C);
A heat storage circuit (A) for performing heat exchange between the refrigerant flowing through (4) and the heat storage medium in the heat storage tank (C) to store heat in the heat storage medium is provided. The heat storage utilization circuit (B) is connected to a heat storage recovery heat exchange section (13) housed in a heat storage tank (C) and a use side heat exchange section (12) by a gas pipe (GL) and a liquid pipe (LL). The connection of the refrigerant is made possible by the connection. At least one of the gas pipe (GL) and the liquid pipe (LL) is provided with a transfer means (11), (15), (30) for generating a refrigerant transfer driving force in the heat storage utilization circuit (B). I have.

According to this specific matter, when utilizing the heat stored in the heat storage medium, the refrigerant circulation operation is performed in the heat storage utilization circuit (B). This allows the heat storage recovery heat exchange section (13)
And recovers the cold heat from the heat storage medium, and transfers this cold heat to the use-side heat exchange section (12). Therefore, the heat storage utilization circuit
In (B), it is only necessary to obtain a transfer driving force large enough to circulate the refrigerant, so that a large transfer driving force is not required.

[0011] The second aspect of the present invention is the first aspect of the present invention.
The premise is the same as the described invention. The heat storage unit (4) further includes a heat storage heat exchange unit (4) housed in the heat storage tank (C), and is provided between the refrigerant flowing through the heat storage heat exchange unit (4) and the heat storage medium in the heat storage tank (C). A heat storage circuit (A) for performing heat exchange and storing heat in the heat storage medium is provided. The heat storage utilization circuit (B) includes a heat storage extraction circuit (B1) having a heat storage recovery heat exchange section (13) housed in a heat storage tank (C), and a utilization side circuit having a utilization side heat exchange section (12). (B2)
And the heat storage extraction circuit (B1) and the use side circuit (B2) are connected to be heat-exchangeable by the intermediate heat exchanger (20). Further, the use side circuit (B2) is connected to the use side heat exchange section (1).
2) and the intermediate heat exchanger (20) with the gas pipe (GL) and liquid pipe (LL)
A refrigerant circuit is connected by at least one of the gas pipe (GL) and the liquid pipe (LL).
Conveying means (11), (15), which generates the refrigerant conveying driving force in (B2)
(30) is provided.

According to this specific matter, when utilizing the heat storage stored in the heat storage medium, the heat storage extracted from the heat storage tank (C) by the heat storage extraction circuit (B1) is used for the intermediate heat exchanger (20).
To the user side circuit (B2) via the
Conveyed to 2). Also in the present invention, it is sufficient that the use-side circuit (B2) obtains a transport driving force large enough to circulate the refrigerant.

According to a third aspect of the present invention, in the regenerative refrigeration apparatus according to the first or second aspect, the heat storage circuit (A) includes:
Cold heat is applied to the heat storage medium in the heat storage tank (C), and the heat storage medium is iced to store heat.

According to a fourth aspect of the present invention, in the regenerative refrigerating apparatus of the first or second aspect, the transport means is a mechanical pump (11) provided in the liquid pipe (LL).

According to a fifth aspect of the present invention, in the regenerative refrigerating apparatus according to the first or second aspect, the conveying means is a compressor (15) provided in a gas pipe (GL).

From these specific items, the configuration of the refrigeration apparatus can be embodied. In particular, in the case of performing the cold storage, when the transfer means is the compressor (15), the condensation temperature of the refrigerant can be set high, and the efficiency of extracting the cold storage can be improved.

According to a sixth aspect of the present invention, in the regenerative refrigerating apparatus of the first or second aspect, the conveying means is provided in the liquid pipe (LL), and the high pressure is generated by heating the liquid refrigerant. At least one of the pressure means (30A) and the pressure reducing means (30B) for generating a low pressure by cooling the gas refrigerant is provided. The difference between the pressure generated by this means and the pressure in the heat storage utilization circuit (B) generates a circulating drive force for the refrigerant.

According to a seventh aspect of the present invention, in the regenerative refrigerating apparatus according to the sixth aspect, the pressurizing means is connected to a container (T) capable of storing a liquid refrigerant, and the drive source heat exchanger storing the refrigerant. (30A). The liquid refrigerant in the drive source heat exchanger (30A) is heated, and the pressure that increases with the evaporation of the refrigerant is increased by a container (T).
To push the liquid refrigerant out of the container (T).

According to an eighth aspect of the present invention, in the regenerative refrigerating apparatus according to the sixth aspect, the pressure reducing means is connected to a container (T) capable of storing a liquid refrigerant, and the driving source heat exchanger stores the refrigerant. (30B). The gas refrigerant in the drive source heat exchanger (30B) is cooled, and a pressure descending with the condensation of the gas refrigerant is applied to the inside of the container (T) to suck the refrigerant into the container (T). I have to.

According to these specific items, it is possible to obtain a driving force for transporting the refrigerant by utilizing heat without using a pump or a compressor, and to obtain a highly reliable refrigerant transport operation.

According to a ninth aspect of the present invention, in the regenerative refrigerating apparatus according to the sixth aspect, a compressor for generating a conveying force is provided, and the pressurizing means (30A) heats the refrigerant discharged from the compressor. The high pressure is generated by heating the liquid refrigerant using the above method.

According to an eleventh aspect of the present invention, in the regenerative refrigeration system of the sixth aspect, a heat exchanger for generating a low pressure for evaporating the liquid refrigerant is provided, and the pressure reducing means (30B) is provided with the heat exchanger. The gas refrigerant is cooled by utilizing an endothermic effect accompanying the evaporation of the refrigerant to generate a low pressure.

According to these specific items, heat for generating a high pressure or a low pressure can be reliably obtained, and a stable refrigerant transfer operation can be performed without being substantially affected by the outside air temperature or the like.

According to a tenth aspect of the present invention, in the regenerative refrigerating apparatus according to the sixth aspect, the pressurizing means (30A) generates a high pressure by heating the liquid refrigerant using the heat of the outside air. I have to.

According to a twelfth aspect of the present invention, in the regenerative refrigeration system of the sixth aspect, the heat storage circuit (A) includes a heat storage tank.
It is assumed that cold is given to the heat storage medium in (C) and the heat storage medium is iced to store heat. The pressure reducing means (30B) generates a low pressure by cooling the gas refrigerant by using the cold stored in the heat storage tank (C).

According to these specific items, the driving force for transporting the refrigerant can be obtained without requiring a special heat source for generating a high pressure or a low pressure.

According to a thirteenth aspect of the present invention, in the regenerative refrigeration system of the ninth aspect, the heat storage circuit (A) includes a compressor.
(1) The heat source side heat exchanger (2), the pressure reducing mechanism (3), and the heat storage heat exchange section (4) housed in the heat storage tank (C) can be circulated through the refrigerant pipe (5). Connect in order. In addition, the compressor (1) of the heat storage circuit (A) is configured to also serve as a compressor for generating a conveying force.

[0028] The invention according to claim 14 is the invention according to claim 11.
In the regenerative refrigeration system described, the heat storage circuit (A) is provided with a compressor (1), a heat source side heat exchanger (2), a pressure reducing mechanism (3), and a heat storage tank (C).
The heat exchange unit (4) for heat storage accommodated therein is connected in order by a refrigerant pipe (5) so that refrigerant can be circulated. After discharging from the compressor (1) and condensing in the heat source heat exchanger (2),
The refrigerant decompressed by the pressure reducing mechanism (3) is introduced into a low-pressure generating heat exchanger, and the refrigerant is evaporated to cool the gas refrigerant to generate a low pressure.

According to these specific items, the number of components of the equipment constituting the refrigeration circuit can be reduced. That is, in the invention according to claim 13, the compressor (1) of the heat storage circuit (A) and the compressor for generating the conveying force are shared by one compressor. On the other hand, in the invention according to claim 14, the heat storage circuit (A) also serves as a generation unit of the refrigerant to be supplied to the low-pressure generating heat exchanger.

According to a fifteenth aspect of the present invention, in the regenerative refrigeration system of the second aspect, a compressor for generating a conveying force is provided. Further, the transfer means is provided in the liquid refrigerant (LL), and the transfer means uses the heat of the refrigerant discharged from the compressor for generating the transfer force to heat the liquid refrigerant to generate a high pressure. Means (30A), and the pressurizing means (30A
The difference between the pressure generated by A) and the pressure in the heat storage utilization circuit (B) generates a circulating driving force of the refrigerant.

According to a sixteenth aspect of the present invention, in the regenerative refrigeration system of the second aspect, a heat exchanger for generating a low pressure in which the liquid refrigerant evaporates is provided. Further, the transfer means is a liquid refrigerant.
(LL) and a pressure reducing means (30B) for cooling the gas refrigerant to generate a low pressure by utilizing an endothermic effect accompanying the evaporation of the refrigerant in the low-pressure generating heat exchanger. Prepare. The difference between the pressure generated by the pressure reducing means (30B) and the pressure in the heat storage utilization circuit (B) generates a circulating driving force of the refrigerant.

According to these specific items, similarly to the above-mentioned inventions, heat for generating a high pressure or a low pressure can be reliably obtained, and is hardly affected by the outside air temperature or the like. A stable refrigerant transfer operation can be performed.

[0033] The invention of claim 17 provides the above-mentioned claim 15.
In the regenerative refrigeration system described in the above, the heat storage extraction circuit (B1)
The compressor (15), the heat storage recovery heat exchange section (13) housed in the heat storage tank (C), and the intermediate heat exchanger (20) are connected in order by a refrigerant pipe (14a) so that refrigerant can be circulated. Make up. Further, the compressor (15) of the heat storage extraction circuit (B1) is configured to also serve as a compressor for generating a conveying force.

[0034] The invention of claim 18 provides the above-mentioned claim 16.
In the regenerative refrigeration system described in the above, the heat storage extraction circuit (B1)
The compressor (15), the heat storage recovery heat exchange section (13) housed in the heat storage tank (C), and the intermediate heat exchanger (20) are connected in order by a refrigerant pipe (14a) so that refrigerant can be circulated. Make up. Further, the refrigerant discharged from the compressor (15) and condensed in the heat storage / recovery heat exchange section (13) is introduced into a low pressure generating heat exchanger, where the refrigerant is evaporated to cool the gas refrigerant to reduce the low pressure. It is configured to be generated.

According to the nineteenth aspect of the present invention, the above-mentioned claim 15 is provided.
In the regenerative refrigeration system described, the heat storage circuit (A) is provided with a compressor (1), a heat source side heat exchanger (2), a pressure reducing mechanism (3), and a heat storage tank (C).
The heat exchange unit (4) for heat storage accommodated therein is connected in order by a refrigerant pipe (5) so that refrigerant can be circulated. On the other hand, the heat storage extraction circuit (B1) is connected to the compressor, the heat storage recovery heat exchange section (13) housed in the heat storage tank (C), and the intermediate heat exchanger (20) to the refrigerant pipe (1).
According to 4a), the refrigerant is connected in order so that the refrigerant can be circulated. Further, the compressor (1) of the heat storage circuit (A) is configured to also serve as a compressor for generating a transfer force and a compressor of the heat storage extraction circuit (B1).

Also in these specific matters, the number of components of the equipment constituting the refrigeration circuit can be reduced, as in the above-described inventions. That is, in the invention according to claim 17, the compressor (15) of the heat storage extraction circuit (B1) and the compressor for generating the transfer force are shared by one compressor.
In the invention according to the eighth aspect, the heat storage extraction circuit (B1) also has a function as a generation unit of the refrigerant introduced into the heat exchanger for generating low pressure. In the invention according to the nineteenth aspect, the compressor of the heat storage circuit (A) is used. (1) One compressor can be used as the compressor for generating the conveying force and the compressor for the heat storage extraction circuit (B1).

According to a twentieth aspect of the present invention, there is provided an air conditioner according to the first or second aspect, wherein the use-side heat exchange section is an indoor heat exchanger (12) disposed in an air-conditioned room. Have applied.

According to this specific matter, the driving force for circulating the refrigerant when performing indoor air conditioning can be reduced, so that an efficient air-conditioning operation can be performed.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a case where the present invention is applied to an ice storage type air conditioner will be described.

(First Embodiment) First, a first embodiment will be described with reference to FIG. FIG. 1 shows a refrigerant piping system of the air conditioner according to the present embodiment. As shown in this figure, the present apparatus includes a primary refrigerant circuit (A) as a heat storage circuit, a secondary refrigerant circuit (B) as a heat storage utilization circuit, and a heat storage tank (C). The refrigerant of B) is configured to be able to exchange heat with water (or ice water) as a heat storage medium in the heat storage tank (C). Hereinafter, the configuration of each circuit (A, B) will be described.

The primary refrigerant circuit (A) includes a compressor (1), an outdoor heat exchanger (2) as a heat source side heat exchanger, an electric expansion valve (3) as a pressure reducing mechanism, and a heat exchange unit for heat storage. The ice making heat transfer pipe (4) is connected in order by a refrigerant pipe (5) so that the refrigerant can circulate. As a result, the refrigerant discharged from the compressor (1) condenses in the outdoor heat exchanger (2) and the electric expansion valve
After depressurizing in (3), evaporate in the ice making heat transfer tube (4) to evaporate
The water in (C) is cooled to generate ice in the heat storage tank (C).

The secondary refrigerant circuit (B) includes a pump (11) as a conveying means, and an indoor heat exchanger (12) as a use-side heat exchange section.
In addition, a use-side heat transfer tube (13) as a heat storage / recovery heat exchange section is connected in order by a refrigerant pipe (14) so that refrigerant can circulate. For details, see indoor heat exchanger (12) and use side heat transfer tube
(13) are connected by a gas line (GL) and a liquid line (LL), and the pump (11) is provided in the liquid line (LL). For this reason, the refrigerant circulates along with the drive of the pump (11), and the heat storage tank in the use-side heat transfer tube (13).
The refrigerant condensed by the cold heat in (C) is evaporated in the indoor heat exchanger (12) to cool the indoor air.

Next, the operation of this embodiment will be described. First, the ice making operation will be described. During this operation, only the primary refrigerant circuit (A) operates. That is, the compressor (1) is driven, and the refrigerant discharged from the compressor (1)
In the outdoor heat exchanger (2), heat is exchanged with the outside air to condense. Then, after the pressure of the liquid refrigerant is reduced by the electric expansion valve (3), the liquid refrigerant exchanges heat with water in the heat storage tank (C) in the ice making heat transfer tube (4) to evaporate and cool the water. . The evaporated refrigerant is collected on the suction side of the compressor (1). By performing such a refrigerant circulation operation, the water cooled in the heat storage tank (C) becomes iced, and cold heat is stored in the heat storage tank (C).

Next, a description will be given of a cooling operation utilizing cold energy in the heat storage tank (C). During this operation,
Only the secondary refrigerant circuit (B) operates. That is, the pump (1
1) is driven to circulate the refrigerant in the secondary refrigerant circuit (B). As a result, the gas line (GL) of the secondary refrigerant circuit (B)
The gas refrigerant flowing through the heat exchanger (13) condenses by exchanging heat with the cold water in the heat storage tank (C) in the use side heat transfer tube (13), and deprives the water of cold heat. Thereafter, the liquid refrigerant reaches the indoor heat exchanger (12) via the pump (11) and exchanges heat with indoor air to evaporate. Thereby, the indoor air is cooled.

Because of such a cooling operation utilizing cold energy, in the secondary refrigerant circuit (B), the pressure difference between the suction side and the discharge side of the pump (11) is determined by the secondary refrigerant circuit (B). It suffices if a size large enough to allow refrigerant circulation in B) is obtained. That is, unlike the conventional ice storage air conditioner in which the utilization side circuit is configured by a refrigeration circuit, a large transport driving force is not required for transporting the refrigerant and changing the refrigerant phase. Therefore, the power consumption during the day can be significantly reduced.

-Embodiment of Improved Secondary Refrigerant Circuit-Next, another embodiment of the present invention will be described. In the following second to fifth embodiments, the secondary refrigerant circuit (B) is improved. Therefore, only the configuration of the secondary refrigerant circuit (B) will be described here.

(Second Embodiment) First, a second embodiment will be described with reference to FIG. Secondary refrigerant circuit of the present embodiment
(B) replaces the pump (11) of the first embodiment described above,
A compressor (15) is provided in the gas line (GL). The discharge side of the compressor (15) is connected to the use side heat transfer tube (13), and the suction side is connected to the indoor heat exchanger (12).

The ice making operation of this embodiment is the same as that of the above-described first embodiment, and the description is omitted here.

In the cooling operation using cold energy of the present embodiment, the compressor (15) is driven to circulate the refrigerant in the secondary refrigerant circuit (B). As a result, the gas refrigerant discharged from the compressor (15) exchanges heat with the cold water in the heat storage tank (C) in the use side heat transfer tube (13) to be condensed and deprives the water of cold heat. . After that, this liquid refrigerant passes through the liquid line (LL),
It reaches (12) and evaporates by performing heat exchange with room air. Thereby, the indoor air is cooled.

As described above, also in this embodiment, in the secondary refrigerant circuit (B), the pressure difference between the suction side and the discharge side of the compressor (15) is determined by the refrigerant in the secondary refrigerant circuit (B). It is only necessary to obtain a size enough to perform circulation, so that a large transport driving force is not required as in the related art. Also,
Since the gas refrigerant compressed by the compressor (15) flows through the use-side heat transfer tube (13), the condensation temperature of the refrigerant can be set high, and the effective use of the cold heat in the heat storage tank (C) can be achieved. As a result, the sensible heat of the cold water in the heat storage tank (C) can be sufficiently utilized, and the air conditioning performance can be improved.

Third Embodiment Next, a third embodiment will be described with reference to FIG. Secondary refrigerant circuit of the present embodiment
(B) combines the configuration of the first embodiment and the configuration of the second embodiment described above. That is, the pump (11) is connected to the liquid line (LL) of the secondary refrigerant circuit (B),
A compressor (15) is provided in (GL).

Since the ice making operation of this embodiment is the same as that of the first embodiment, the description is omitted here.

In the cooling operation using the cold heat of the present embodiment, the pump (11) and the compressor (15) are driven to circulate the refrigerant in the secondary refrigerant circuit (B). This allows the gas refrigerant discharged from the compressor (15) to pass through the heat storage tank in the use-side heat transfer tube (13).
It exchanges heat with the cold water in (C) to condense and deprive the water of cold. Thereafter, the liquid refrigerant is supplied with a circulation driving force by the pump (11), reaches the indoor heat exchanger (12), exchanges heat with indoor air, and evaporates. Thereby, the indoor air is cooled.

As described above, also in this embodiment, since the refrigerant compressed by the compressor (15) flows through the use-side heat transfer tube (13), it is the same as in the above-described second embodiment. To improve air-conditioning performance.
By using 1) together, the circulation driving force of the refrigerant can be stably obtained.

(Fourth Embodiment) Next, a fourth embodiment will be described with reference to FIG. Secondary refrigerant circuit of the present embodiment
(B) is composed of a heat storage extraction circuit (B1) and a utilization side circuit (B2). The heat storage extraction circuit (B1) allows the compressor (15), the use side heat transfer tube (13), and the first heat transfer tube (20a) of the intermediate heat exchanger (20) to circulate the refrigerant through the refrigerant pipe (14a). They are connected in order.

On the other hand, the use-side circuit (B2) includes a pump (11), an indoor heat exchanger (12), and a second heat transfer tube (20) of the intermediate heat exchanger (20).
b) are sequentially connected by a refrigerant pipe (14b) so as to enable circulation of the refrigerant.

Therefore, when the refrigerant circulation operation is performed in the heat storage extraction circuit (B1) and the use side circuit (B2), the heat storage tank
After the cold heat in (C) is once taken out by the heat storage taking out circuit (B1), it is given to the use side heat transfer tube (13) by heat exchange in the intermediate heat exchanger (20).

Next, a description will be given of a cooling operation utilizing cold energy in the heat storage tank (C). During this operation,
The heat storage extraction circuit (B1) and the utilization side circuit (B2) operate together. That is, in the heat storage extraction circuit (B1), the compressor (15)
In the use side circuit (B2), the pumps (11) are driven respectively, and the refrigerant circulates in the circuits (B1, B2). Thereby, in the heat storage extraction circuit (B1), the high-temperature and high-pressure gas refrigerant discharged from the compressor (15) is stored in the heat storage tank in the use-side heat transfer tube (13).
It exchanges heat with the cold water in (C) to condense and deprive the water of cold. Thereafter, the liquid refrigerant is supplied to the intermediate heat exchanger (20).
Reaches the first heat transfer tube (20a), and gives cold heat to the refrigerant in the use side circuit (B2). On the other hand, in the utilization side circuit (B2) that has received the cold heat, it is sent to the indoor heat exchanger (12) by the circulating driving force of the pump (11) and exchanges heat with the indoor air to evaporate. Thereby, the indoor air is cooled.

Since such an operation is performed, in this embodiment, it is not necessary to extend the refrigerant circuit (B1) including the compressor (15) into the room. That is, in the refrigerant circuit (B1) including the compressor (15), the lubricating oil of the compressor (15) circulates together with the refrigerant. Defects are a concern, but according to the configuration of this embodiment, lubrication failure is eliminated by setting the pipe length of the heat storage extraction circuit (B1) short and setting the pipe length of the utilization side circuit (B2) long. While extending, the refrigerant circuit can be extended to the room. Therefore, the configuration of the present embodiment is particularly effective when the distance between the heat storage tank (C) and the room is large.

(Fifth Embodiment) Next, a fifth embodiment will be described with reference to FIG. This embodiment is a modification of the above-described fourth embodiment. Therefore, only differences from the fourth embodiment will be described here.

As shown in FIG. 5, the use side circuit (B
2) is a gas line instead of the pump (11) of the fourth embodiment.
(GL) is provided with a compressor (15). The discharge side of the compressor (15) is the intermediate heat exchanger (20), and the suction side is the indoor heat exchanger (1).
Connected to 2) respectively.

In the refrigerant circulation operation in the present embodiment, in the intermediate heat exchanger (20), the liquid refrigerant in the heat storage extraction circuit (B1) that has condensed by exchanging heat with the cold water in the heat storage tank (C) is:
A heat storage extraction circuit that exchanges heat with the indoor circuit (B2) that evaporates by exchanging heat with indoor air in the indoor heat exchanger (12)
Cold heat is transferred from (B1) to the use side circuit (B2).

That is, the second heat transfer tube (2) of the intermediate heat exchanger (20)
The air conditioning performance can be further improved by setting the condensation temperature in 0b) high.

Embodiment in which the Conveying Means are Improved Next, an embodiment in which the conveying means for obtaining the refrigerant circulation driving force in the secondary refrigerant circuit (B) is improved will be described. In each of the above-described embodiments, the circulation driving force is obtained by using the discharge pressure of the pump (11) or the compressor (15) .However, the following embodiments employ heating of a liquid refrigerant or cooling of a gas refrigerant. The transport driving force is obtained by utilizing the pressure change accompanying the phase change.

In the following embodiment, the first
A case will be described in which a means for obtaining a transport driving force by a phase change is applied instead of the pump (11) of the embodiment.

(Sixth Embodiment) A sixth embodiment will be described with reference to FIG. As shown in FIG. 6, the liquid line (L
L), a tank (T) as a container storing the liquid refrigerant is connected, and a driving heat exchanger is connected to the tank (T) via a pipe (25).
Connect (30). A liquid refrigerant is stored in the driving heat exchanger (30). The drive heat exchanger (30) is heated or cooled by a heat source (not shown). In this state, when the driving heat exchanger (30) is heated, the internal refrigerant evaporates and the pressure in the heat exchanger (30) increases, and this pressure acts on the liquid level of the refrigerant in the tank (T). I do. As a result, the liquid level is pushed down, and the liquid refrigerant in the tank (T) is pushed out to the liquid line (LL). Conversely, when the driving heat exchanger (30) is cooled, the refrigerant in the heat exchanger (30) is condensed, the internal pressure of the refrigerant is reduced, and this pressure acts on the tank (T). Thereby, the liquid refrigerant in the circuit is collected in the tank (T). By repeating such an operation alternately, circulation of the refrigerant in the circuit can be performed. In the case of the present embodiment, check valves (CV, CV) are provided in the liquid line (LL) in order to set the circulation direction of the refrigerant in the secondary refrigerant circuit (B) to one direction. .

(Seventh Embodiment) Next, a seventh embodiment will be described. As shown in FIG. 7, the present embodiment includes a drive heat exchanger (30A) dedicated to pressurization as a pressurizing means and a drive heat exchanger (30B) dedicated to depressurization as a depressurizing means. (25) and solenoid valve (SV-1, SV-2), tank (T)
Is configured to be able to switch the connection state with respect to. That is, when extruding the liquid refrigerant from the tank (T), the drive heat exchanger (30A) dedicated to pressurization is communicated with the tank (T),
Conversely, when recovering the liquid refrigerant to the tank (T), each solenoid valve (SV-1, SV-2) is connected so that the drive heat exchanger (30B) dedicated to decompression communicates with the tank (T). Switch. Thereby, the circulation operation of the refrigerant can be obtained only by the switching operation of the valve.

(Eighth Embodiment) Next, an eighth embodiment will be described. In the present embodiment, as shown in FIG. 8, a plurality of tanks (T1, T2) are provided, and the refrigerant is pushed out from one tank (T1) and the refrigerant is collected in the other tank (T2). By alternately repeating this, it is possible to continuously circulate the refrigerant. That is, the liquid line (L
Part L) is branched, and each tank (T1, T2) is individually connected to each branch pipe (LL-1, LL-2). Each tank (T1, T2)
As in the case of the seventh embodiment, the drive heat exchanger (30A) dedicated to pressurization and the drive heat exchanger (30B) dedicated to decompression are provided with solenoid valves (SV-1 to SV-4). Can be selectively switched.

With this configuration, one of the tanks (T1) is connected to the driving heat exchanger (30A) dedicated to pressurization, and the other tank (T1) is connected.
2) is connected to the driving heat exchanger (30B) dedicated to decompression, so that the refrigerant pushed out from one tank (T1) circulates through the secondary circuit (B) and then to the other tank (T2). ) Will be collected. After continuing this state for a predetermined time, the solenoid valve (S
V-1 to SV-4), connect the other tank (T2) to the drive heat exchanger (30A) dedicated to pressurization, and connect one tank (T1) to the drive heat exchanger dedicated to decompression. (30B). Thereby, the tank for extruding the refrigerant and the tank for collecting the refrigerant are switched. By repeating such an operation, continuous circulation of the refrigerant in the secondary circuit (B) becomes possible, and continuous cooling of the room can be performed.

(Other Modifications) The following modification is considered as another modification in which the conveying means for obtaining the refrigerant circulation driving force in the secondary refrigerant circuit (B) is improved.

(I) The drive heat exchanger (30A) for pressurization is made capable of exchanging heat with the outside air, and the heat of the outside air is used to evaporate the liquid refrigerant of the drive heat exchanger (30A). To create a high pressure.

(II) The decompression driving heat exchanger (30B) is made to be able to exchange heat with cold water in the heat storage tank (C), and the cooling heat of the driving heat exchanger (30B) is 30B) is condensed to produce a low pressure.

(III) The refrigerant discharged from the compressor (1) of the primary refrigerant circuit (A) can be introduced into the pressurizing drive heat exchanger (30A), and the heat of the discharged refrigerant is utilized. The drive heat exchanger
The liquid refrigerant of (30A) is evaporated to generate a high pressure. That is, the discharge side of the compressor (1) is branched, and the branch pipe is introduced into the pressurizing drive heat exchanger (30A).

(IV) Electric expansion valve (3) of primary refrigerant circuit (A)
The pressure-reduced refrigerant can be introduced into the pressure-reducing drive heat exchanger (30B), and the low-pressure is achieved by condensing the gas refrigerant in the drive heat exchanger (30B) by utilizing the heat absorbed by the evaporation operation of the refrigerant. Cause. That is, the downstream side of the electric expansion valve (3) is branched, and the branch pipe is introduced into the pressure reducing drive heat exchanger (30B).

(V) Compressor (15) of heat storage extraction circuit (B1)
Refrigerant into the pressurizing drive heat exchanger (30A), and using the heat of the discharged refrigerant to evaporate the liquid refrigerant of the drive heat exchanger (30A) to generate a high pressure . That is, the discharge side of the compressor (15) is branched, and the branch pipe is introduced into the pressurizing drive heat exchanger (30A).

(VI) The liquid refrigerant flowing through the heat storage extraction circuit (B1) can be introduced into the decompression driving heat exchanger (30B), and the heat absorption by the evaporation operation of the refrigerant is used to make the driving heat exchanger The gas refrigerant of (30B) is condensed to generate a low pressure. That is, a configuration is adopted in which the liquid line of the heat storage extraction circuit (B1) is branched, and the branch pipe is introduced into the pressure reducing drive heat exchanger (30B).

(VII) Primary refrigerant circuit in one compressor
The compressor for supplying the heating refrigerant to the compressor of (A), the compressor of the heat storage extraction circuit (B1), and the driving heat exchanger (30A) for pressurization is also used. That is, the primary refrigerant circuit (A)
The discharge side of the compressor (1) is branched toward the use side heat transfer tube (13) upstream of the heat storage extraction circuit (B1) and the drive heat exchanger (30A) for pressurization. The structure is such that the refrigerant flows through the branch pipe.

In each of the above-described embodiments and modifications, the present invention is applied to an air conditioner. However, the present invention is not limited to this, and can be applied to other refrigeration devices. .

In the above description, the heat storage tank (C) is used to store cold heat and use this cold heat to perform cooling. However, the heat storage tank is used to store warm heat, and this heat storage is used to perform a heating operation. It is also applicable to things.

[0080]

As described above, according to the present invention, the following effects are exhibited. The invention according to claims 1 and 2 is characterized in that at least one of the gas pipe (GL) and the liquid pipe (LL) of the heat storage utilization circuit (B) utilizing the heat storage stored in the heat storage tank (C) is provided with a heat storage utilization circuit ( Transport means (11), (15), (30) for generating the refrigerant transport driving force in B) are provided. In other words, this transport means
By (11), (15), and (30), heat transfer can be performed by obtaining a transfer driving force large enough to circulate the refrigerant in the heat storage utilization circuit (B). Therefore, unlike the conventional circuit in which the heat storage utilization circuit is configured by a refrigeration circuit, a large transport driving force is not required for transporting the refrigerant and changing the refrigerant phase, and the power consumption is greatly reduced. Can be achieved.

According to a third aspect of the present invention, the heat storage medium in the heat storage tank (C) is provided with cold heat, and the heat storage medium is iced to store heat. In the invention according to claim 4, the transport means is a mechanical pump (11) provided in the liquid pipe (LL). Further, in the invention according to claim 5, the conveying means is a compressor (15) provided in the gas pipe (GL). With these configurations, the configuration of the refrigeration apparatus can be embodied. In particular, in the case of performing cold storage, when the transport means is a compressor (15), the condensation temperature of the refrigerant can be set high, the efficiency of extracting cold storage can be improved, and the practicality of the device can be improved. Can be.

According to the sixth aspect of the present invention, a high pressure or a low pressure is generated by heating or cooling the refrigerant, whereby a circulation driving force of the refrigerant in the heat storage utilization circuit (B) is obtained. The invention according to claim 7 is a container capable of storing a liquid refrigerant.
The liquid refrigerant in the drive source heat exchanger (30A) connected to (T) was heated to apply high pressure to the inside of the container (T). vice versa,
In the invention according to claim 8, the gas refrigerant in the drive source heat exchanger (30B) connected to the container (T) capable of storing the liquid refrigerant is cooled to apply a low pressure to the container (T). . With these configurations, it is possible to obtain a driving force for transporting the refrigerant by utilizing heat without using a pump or a compressor,
A highly reliable refrigerant transfer operation can be obtained, and the refrigerant circulation operation in the heat storage utilization circuit (B) can be performed smoothly.

According to the ninth and fifteenth aspects of the present invention, a compressor for generating a conveying force is provided, and the liquid refrigerant is heated using the heat of the refrigerant discharged from the compressor to generate a high pressure. Further, the invention according to claims 11 and 16 is provided with a low-pressure generating heat exchanger in which the liquid refrigerant evaporates, and cools the gas refrigerant by utilizing an endothermic effect accompanying the evaporation of the refrigerant in the heat exchanger. A low pressure was created. With these configurations, heat for generating a high pressure or a low pressure can be reliably obtained, a stable refrigerant transport operation can be performed with little influence from the outside air temperature, etc., and any refrigerant can be obtained regardless of the environment where the apparatus is installed. It becomes possible to install in the position of.

According to the tenth aspect of the present invention, the liquid refrigerant is heated by using the heat of the outside air to generate a high pressure. According to the twelfth aspect of the present invention, the gas refrigerant is cooled using the cold stored in the heat storage tank (C) to generate a low pressure. Therefore, it is possible to obtain a driving force for transporting the refrigerant without requiring a special heat source for generating a high pressure or a low pressure, and to simplify the configuration of the entire apparatus.

According to the thirteenth aspect of the present invention, one compressor is used as the compressor (1) provided in the heat storage circuit (A) and the compressor for generating the conveying force. According to a fourteenth aspect of the present invention, the heat storage circuit (A) also serves as a generation unit of the refrigerant supplied to the low-pressure generating heat exchanger. This makes it possible to reduce the number of components of the equipment constituting the refrigeration circuit, thereby simplifying the configuration of the entire apparatus and reducing costs.

According to a seventeenth aspect of the present invention, the compressor (15) of the heat storage take-out circuit (B1) and the compressor for generating a transfer force are shared by one compressor. The take-out circuit (B1) also has a function as a generation unit for the refrigerant introduced into the low-pressure generation heat exchanger, and the invention according to claim 19 is characterized in that the compressor (1) of the heat storage circuit (A) and the transfer power generation One compressor was used as the compressor for heat storage and the compressor for the heat storage extraction circuit (B1). According to these configurations as well, similarly to the above-described inventions of claims 13 and 14, the number of components of the equipment constituting the refrigeration circuit can be reduced, and the overall configuration of the apparatus can be simplified and the cost can be reduced.

In the twentieth aspect, the refrigeration apparatus according to the present invention is applied to an air conditioner. Thereby, the refrigerant circulation driving force at the time of performing indoor air conditioning can be reduced, so that efficient air conditioning operation can be performed.

[Brief description of the drawings]

FIG. 1 is a refrigerant piping system diagram of a regenerative air conditioner according to a first embodiment.

FIG. 2 is a refrigerant piping system diagram of a heat storage type air conditioner according to a second embodiment.

FIG. 3 is a refrigerant piping system diagram of a regenerative air conditioner according to a third embodiment.

FIG. 4 is a refrigerant piping system diagram of a regenerative air conditioner according to a fourth embodiment.

FIG. 5 is a refrigerant piping system diagram of a regenerative air conditioner according to a fifth embodiment.

FIG. 6 is a diagram illustrating a configuration of a transport unit according to a sixth embodiment.

FIG. 7 is a diagram illustrating a configuration of a transport unit according to a seventh embodiment.

FIG. 8 is a diagram illustrating a configuration of a transport unit according to an eighth embodiment.

[Explanation of symbols]

 (1,15) Compressor (2) Outdoor heat exchanger (heat source side heat exchanger) (3) Electric expansion valve (decompression mechanism) (4) Ice heat transfer tube (heat exchange part for heat storage) (5) Refrigerant piping ( 11) Pump (transportation means) (12) Indoor heat exchanger (use side heat exchange section) (13) Use side heat transfer tube (heat storage recovery heat exchange section) (20) Intermediate heat exchanger (30) Drive heat exchanger (Conveying means) (A) Primary refrigerant circuit (heat storage circuit) (B) Secondary refrigerant circuit (heat storage utilization circuit) (B1) Heat storage extraction circuit (B2) Usage side circuit (C) Thermal storage tank (GL) Gas Line (LL) Liquid line (T) Tank (container)

Claims (20)

[Claims] 1. A regenerative refrigeration system comprising a heat storage tank (C) storing a heat storage medium and a heat storage utilization circuit (B) utilizing heat stored in the heat storage medium, wherein the heat storage tank (C) It has a heat exchange unit (4) for heat storage stored in
A heat storage circuit (A) for performing heat exchange between the refrigerant flowing through the heat storage heat exchange unit (4) and the heat storage medium in the heat storage tank (C) to store heat in the heat storage medium; In (B), the heat storage and recovery heat exchange section (13) housed in the heat storage tank (C) and the use side heat exchange section (12) circulate the refrigerant through the gas pipe (GL) and the liquid pipe (LL). Transfer means (11), (15), and (30) that are connected to at least one of the gas pipe (GL) and the liquid pipe (LL) to generate a refrigerant transfer driving force in the heat storage utilization circuit (B). ) Is provided. 2. A regenerative refrigeration system comprising: a heat storage tank (C) storing a heat storage medium; and a heat storage utilization circuit (B) using heat stored in the heat storage medium. It has a heat exchange unit (4) for heat storage stored in
A heat storage circuit (A) for performing heat exchange between the refrigerant flowing through the heat storage heat exchange unit (4) and the heat storage medium in the heat storage tank (C) to store heat in the heat storage medium; (B) is a heat storage extraction circuit (B1) having a heat storage recovery heat exchange section (13) housed in the heat storage tank (C);
A use-side circuit (B2) having a use-side heat exchange unit (12),
The heat storage extraction circuit (B1) and the use side circuit (B2) are connected so that heat can be exchanged by the intermediate heat exchanger (20), and the use side circuit (B2) is connected to the use side heat exchange unit (12). The intermediate heat exchanger (20) is connected to the gas pipe (GL) and the liquid pipe (LL) so that the refrigerant can circulate, and the gas pipe (GL) and the liquid pipe (LL) are connected to at least one of the use side. A regenerative refrigeration system comprising a transfer means (11), (15), (30) for generating a refrigerant transfer driving force in the circuit (B2). 3. The heat storage refrigeration apparatus according to claim 1, wherein the heat storage circuit (A) performs heat storage by applying cold heat to the heat storage medium in the heat storage tank (C) and icing the heat storage medium. A regenerative refrigeration system characterized by the following. 4. The regenerative refrigerating apparatus according to claim 1, wherein the conveying means is a mechanical pump provided in the liquid pipe (LL).
A regenerative refrigeration system, characterized in that: 5. The regenerative refrigeration system according to claim 1, wherein the conveying means is a compressor (15) provided in the gas pipe (GL). 6. The regenerative refrigeration apparatus according to claim 1, wherein the transport means is provided in the liquid pipe (LL), and the pressurizing means (30A) for generating a high pressure by heating the liquid refrigerant and the gas. Decompression means for generating a low pressure by cooling a refrigerant
(30B), and a regenerative refrigeration system for generating a circulating driving force of the refrigerant by a difference between a pressure generated by this means and a pressure in the heat storage utilization circuit (B). . 7. The regenerative refrigerating apparatus according to claim 6, wherein the pressurizing means is a drive source heat exchanger (30A) connected to a container (T) capable of storing a liquid refrigerant and storing the refrigerant. Heating the liquid refrigerant in the drive source heat exchanger (30A) and applying a pressure that increases with the evaporation of the refrigerant to the inside of the container (T),
A regenerative refrigeration system characterized by extruding a liquid refrigerant from (T). 8. The regenerative refrigerator according to claim 6, wherein the pressure reducing means is a drive source heat exchanger (30B) connected to a container (T) capable of storing a liquid refrigerant and storing the refrigerant. The gas refrigerant in the drive source heat exchanger (30B) is cooled, and a pressure descending with the condensation of the gas refrigerant is applied to the inside of the container (T),
A regenerative refrigeration system, wherein a refrigerant is sucked into the container (T). 9. The regenerative refrigeration system according to claim 6, further comprising a compressor for generating a conveying force, wherein the pressurizing means (30A) heats the liquid refrigerant by using heat of the refrigerant discharged from the compressor. A regenerative refrigeration system characterized in that a high pressure is generated by doing so. 10. The regenerative refrigeration system according to claim 6, wherein the pressurizing means (30A) generates a high pressure by heating the liquid refrigerant using heat of the outside air. apparatus. 11. The regenerative refrigeration system according to claim 6, further comprising a low-pressure generating heat exchanger for evaporating the liquid refrigerant,
(30B) is a regenerative refrigerating apparatus characterized in that a gas refrigerant is cooled by using an endothermic effect accompanying evaporation of the refrigerant in the heat exchanger to generate a low pressure. 12. The heat storage refrigeration apparatus according to claim 6, wherein the heat storage circuit (A) stores the heat by applying cold to the heat storage medium in the heat storage tank (C) to ice the heat storage medium. The pressure-reducing means (30B) generates a low pressure by cooling the gas refrigerant by using the cold stored in the heat storage tank (C). 13. The regenerative refrigeration system according to claim 9, wherein the heat storage circuit (A) includes a compressor (1), a heat source side heat exchanger (2), a pressure reducing mechanism (3), and a heat storage tank (C). Heat exchange unit (4)
Wherein the compressor (1) of the heat storage circuit (A) also serves as a compressor for generating a transfer force, wherein the heat storage circuit (A) also serves as a compressor for generating a transfer force. Type refrigeration equipment. 14. The regenerative refrigeration apparatus according to claim 11, wherein the heat storage circuit (A) includes a compressor (1), a heat source side heat exchanger (2), a pressure reducing mechanism (3), and a heat storage tank (C). Heat exchange unit (4)
Are connected in order by a refrigerant pipe (5) so that the refrigerant can circulate.The refrigerant is discharged from the compressor (1), condensed in the heat source heat exchanger (2), and then decompressed by the decompression mechanism (3). Is introduced into a low-pressure generating heat exchanger, and the refrigerant is evaporated to cool the gas refrigerant to generate a low pressure. 15. The regenerative refrigerating apparatus according to claim 2, further comprising a compressor for generating a transfer force, wherein the transfer means is provided in the liquid refrigerant (LL) and receives a signal from the compressor for generating the transfer force. Pressurizing means (3) that generates high pressure by heating the liquid refrigerant using the heat of the discharged refrigerant
0A), wherein the refrigerant circulating driving force is generated by a difference between the pressure generated by the pressurizing means (30A) and the pressure in the heat storage utilization circuit (B). 16. The regenerative refrigerating apparatus according to claim 2, further comprising a low-pressure generating heat exchanger for evaporating the liquid refrigerant, wherein the transport means is provided in the liquid refrigerant (LL) and the low-pressure generating heat exchanger is provided. A pressure reducing means (3) that cools the gas refrigerant to generate a low pressure by utilizing an endothermic effect accompanying the evaporation of the refrigerant in the heat exchanger.
0B), wherein a regenerative driving force of the refrigerant is generated by a difference between the pressure generated by the pressure reducing means (30B) and the pressure in the heat storage utilization circuit (B). 17. The heat storage refrigeration apparatus according to claim 15, wherein the heat storage extraction circuit (B1) includes: a compressor (15); a heat storage recovery heat exchange section (13) housed in a heat storage tank (C); The heat exchanger (20) is connected in order by a refrigerant pipe (14a) so as to circulate the refrigerant, and the compressor (15) of the heat storage extraction circuit (B1) also serves as a compressor for generating a transfer force. A regenerative refrigeration system, characterized in that: 18. The heat storage refrigeration apparatus according to claim 16, wherein the heat storage extraction circuit (B1) includes a compressor (15), a heat storage recovery heat exchange section (13) housed in a heat storage tank (C), A heat exchanger (20) is connected in order by a refrigerant pipe (14a) so that refrigerant can circulate, and a low-pressure refrigerant is discharged from the compressor (15) and condensed in the heat storage recovery heat exchange section (13). A regenerative refrigeration system, wherein the refrigerant is introduced into a heat exchanger, and the gas refrigerant is cooled to generate a low pressure by evaporating the refrigerant. 19. The heat storage refrigeration apparatus according to claim 15, wherein the heat storage circuit (A) includes a compressor (1), a heat source side heat exchanger (2), a pressure reducing mechanism (3), and a heat storage tank (C). Heat exchange unit (4)
Are connected in order by a refrigerant pipe (5) so that refrigerant can circulate.The heat storage extraction circuit (B1) includes a compressor, a heat storage recovery heat exchange unit (13) housed in a heat storage tank (C), and an intermediate The heat exchanger (20) is connected in order so that the refrigerant can circulate through the refrigerant pipe (14a) .The compressor (1) of the heat storage circuit (A) includes a compressor for generating a transfer force and a heat storage extraction circuit ( A regenerative refrigeration system, which also serves as the compressor of B1). 20. The regenerative refrigeration system according to claim 1, wherein the use-side heat exchange unit is an indoor heat exchanger (1) disposed in an air-conditioned room.
2) A regenerative refrigeration system which is applied to the air conditioner according to 2).