JPH10300265A - Refrigerating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable selection of heat source devices optimum for various conditions by providing a plurality of kinds of different heat source devices on the heat source side for a secondary refrigerant system. SOLUTION: Two indoor units 70 and 80 are connected to six outdoor units 10-60 through a first piping L1 and a second piping L2. Each of the outdoor units 10-60 is equipped with a heat source device different from others. A heat source side circuit means A is constructed of heat source circuits 11-61 and transfer of heat is enabled between this means and a closed circuit B as a use side circuit means. In an actual operation, some one of the outdoor units 10-60 is operated and cold or hot heat is given to the closed circuit B of a user to conduct indoor cooling or heating. In other words, the cold heat is given to the indoor units 10 and 80 from the outdoor units 10-60 at the time of an indoor cooling operation, while the hot heat is given to the indoor units 70 and 80 from the outdoor units 10-60, in contrast, at the time of an indoor heating operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigeration system,
In particular, the present invention relates to an improvement of a so-called secondary refrigerant system that can transfer heat between a heat source side circuit and a use side circuit.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Publication No. 6-84828.
As disclosed in Japanese Unexamined Patent Publication, a secondary refrigerant system including a heat source side circuit and a use side circuit, and capable of exchanging heat between the two is known. Hereinafter, this type of system will be described. The heat source side circuit includes a compressor driven by a motor, a heat source side heat exchanger, an expansion mechanism, and a heat source side heat transfer section of the main heat exchanger connected by a refrigerant pipe so that refrigerant can circulate. On the other hand, the use-side circuit includes a pump, a use-side heat transfer section of the main heat exchanger, and the use-side heat exchanger connected by piping so that fluid (for example, water) can be circulated.

[0003] In the case of performing a heat absorbing operation in a use side heat exchanger such as indoor cooling, in a heat source side circuit, a refrigerant compressed by a compressor and condensed in the heat source side heat exchanger is decompressed by an expansion mechanism.
In the heat source side heat transfer section of the main heat exchanger, a circulation operation is performed in which the heat exchange with the fluid flowing through the use side heat transfer section evaporates and then returns to the compressor. In the use side circuit, the fluid circulates by the drive of the pump, and cool heat is given from the heat source side circuit in the use side heat transfer section of the main heat exchanger, and the cool heat is given to a predetermined space (for example, indoor) by the use side heat exchanger. Give to.

Conversely, when performing a heat radiation operation in the use side heat exchanger such as indoor heating, in the heat source side circuit, the refrigerant is condensed in the heat source side heat transfer section of the main heat exchanger, and the heat source side heat exchange. Evaporate in the vessel. Heat is given to the use side circuit by the condensing refrigerant, and the heat is radiated in the use side heat exchanger.

[0005]

In such a secondary refrigerant system, a system using the above-described motor driven compressor as a heat source side circuit, that is, a system using an electric motor driven type vapor compression refrigerator is not used. Although there is an advantage that the reliability of the equipment is high, there are problems that the power receiving capacity is limited and the refrigeration capacity cannot be quickly responded to an increase in the refrigeration load, and that the refrigeration capacity is easily affected by the outside air temperature.

Therefore, in this kind of secondary refrigerant system, it is conceivable to apply other heat source equipment to the heat source side circuit. That is, as the heat source device, a device using a gas engine driven compressor, or a device in which hot water is supplied to a use side circuit by a hot water circulation circuit provided with a boiler can be considered.

[0007] However, the use of a gas engine-driven compressor has the advantage of not being limited by the power receiving capacity, but may lead to an increase in the size of the equipment and concerns about exhaust gas problems. On the other hand, the use of a boiler has the advantage of being less susceptible to the influence of the outside air temperature, but has the problem that only a system dedicated to heating can be realized.

As described above, each of the heat source devices has its own advantages and disadvantages, and at present, the equipment on the heat source side most suitable for the secondary refrigerant system has not been put to practical use.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to make it possible to select the most suitable heat source equipment suitable for various conditions by improving the configuration of the heat source equipment. To obtain a refrigerating device that performs

[0010]

In order to achieve the above object, the present invention relates to a so-called secondary refrigerant system having a heat source side circuit means and a use side circuit means capable of exchanging heat with each other. It is equipped with multiple types of different heat source devices (the principle of generation of cold and warm heat and different types of heat devices), and by using these heat source devices selectively, the most suitable device can be used as a heat source as needed. .

More specifically, the invention according to claim 1 comprises a heat source side circuit means (A) and a utilization side circuit means (B), and each circuit means
It is assumed that a refrigerating apparatus is configured to transfer heat between circuit means (A, B) by heat exchange of fluid flowing through (A, B) in main heat exchangers (17 to 67). Heat source side circuit means (A)
It is constituted by a plurality of heat source circuits (11 to 61) which individually constitute a closed circuit. At least one of the heat source circuits (11 to 61) is constituted by a different type of heat source device from the other at least one heat source circuit.

According to this specific matter, a plurality of types of heat source circuits
By selecting a device to be used as a heat source from (11 to 61), it becomes possible to obtain an optimal heat source according to the situation. In other words, by driving other devices at the same time so as to compensate for the disadvantages of a specific heat source device, efficient operation becomes possible, and energy saving can be achieved. Furthermore, even if the refrigeration load increases, it is possible to respond quickly.

According to a second aspect of the present invention, in the refrigeration apparatus according to the first aspect, a heat source circuit (11-61) comprising a heat source device of a type different from at least one other heat source circuit. 11) and (12) are converted to heat source side heat exchangers (15) and (25)
And the heat-source-side heat transfer sections (17a) and (27a) of the main heat exchangers (17) and (27) form a closed circuit connected by the refrigerant pipes (18) and (28) so that the refrigerant can circulate. A configuration is provided in which a conveyance unit that applies a circulating driving force to the refrigerant in the closed circuit is provided.

According to this specific matter, the heat source circuits (11) and (12)
The driving force for circulating the refrigerant is reliably obtained by the conveying means. Various means such as a compressor, a pump, and a heat-using transfer mechanism utilizing a pressure accompanying a phase change due to heating or cooling of the refrigerant can be adopted as the transfer means.

The invention according to claims 3 to 8 is characterized in that each heat source circuit (1
1 to 61), a heat source circuit (11) including a heat source device of a different type from at least one other heat source circuit.

That is, according to the third aspect of the present invention, the heat source circuit (11) is a motor-driven vapor compression refrigerator. In the invention described in claim 4, the heat source circuit (21) is a gas engine driven type vapor compression refrigerator. Claim 5
In the described invention, the heat source circuit (31) is an absorption refrigerator. In the invention according to claim 6, the heat source circuit (61) is a heat storage refrigerator having a heat storage tank (67) as a main heat exchanger storing a heat storage material. In the invention according to claim 7,
The heat source circuit (51) includes a boiler (53), and the boiler (53)
And a circulation circuit for circulating the fluid heated.
In the invention according to claim 8, the heat source circuit (41) is configured to transfer hot or cold heat from a heat source plant for district cooling and heating to a main heat exchanger.
A district cooling / heating circuit provided to the use side circuit means (B) via (47).

According to these specific items, the heat source side circuit means
The heat source circuits (11 to 61) constituting (A) can be specifically obtained. In particular, when a vapor compression refrigerator is used, the reliability of the device can be ensured, and when an absorption refrigerator is used, there is no need to use a refrigerant such as chlorofluorocarbon, so a heat source suitable for global environmental issues, etc. When a regenerative refrigerator is used, inexpensive energy such as nighttime power can be used when storing heat. Further, when a circulation circuit including the boiler (53) is employed, it is possible to reliably apply heat to the use-side circuit means (A) without being affected by the outside air temperature. When a district cooling / heating circuit is employed, a relatively large amount of heat can be easily secured.

According to a ninth and tenth aspect of the present invention, there is provided the refrigeration apparatus according to any one of the second to fifth aspects, wherein the fluid circulating in the heat source circuit in the heat source side heat exchanger (15, 25, 35) is provided. It specifies the medium that exchanges heat with the medium. That is, according to the ninth aspect of the present invention, in the heat source side heat exchangers (15, 25, 35), the fluid exchanges heat with the outside air. On the other hand, in the invention according to claim 10, the fluid exchanges heat with water.

According to these specific items, the heat source side heat exchanger (1
5, 25, 35) can be realized. In particular, according to the ninth aspect of the present invention, it is possible to apply warm or cold heat to the fluid circulating in the heat source circuit with a simple configuration. According to the tenth aspect of the present invention, the use of water makes it possible to reliably apply hot or cold heat to the fluid circulating in the heat source circuit without being substantially affected by the outside air temperature.

The invention according to claims 11 to 17 relates to an improvement of a transport means for obtaining a driving force for circulating a fluid in the use side circuit means (B).

According to an eleventh aspect of the present invention, in the refrigerating apparatus according to the first aspect, the fluid flowing through the use side circuit means (B) is subjected to heat exchange with the heat source side circuit means (A). It is a phase-change refrigerant. Use side circuit means (B)
The use side heat transfer section (17b-67b) of the main heat exchanger (17-67) and the use side heat exchanger (71, 81) are connected by a first pipe (L1) and a second pipe (L2). Construct a closed circuit. The conveying means (P1 to P6) for applying a circulating drive force to the refrigerant is provided by a first pipe (L1) and a second pipe (L1).
The pipe (L2) is arranged on the side where the liquid refrigerant flows.

According to a twelfth aspect of the present invention, in accordance with the eleventh aspect of the present invention, the transport means (P1 to P6) is provided with the first
Instead of being arranged on the side where the liquid refrigerant flows out of the pipe (L1) and the second pipe (L2), it is arranged on the side where the gas refrigerant flows among the first pipe (L1) and the second pipe (L2) And

According to these specific items, the transport means (P1 to P6)
Will be embodied.

The thirteenth aspect of the present invention relates to the eleventh aspect.
Alternatively, in the refrigeration apparatus described in 12, the transport means (P1 to P6) are motor driven pumps.

According to a fourteenth aspect of the present invention, in the refrigeration apparatus according to the eleventh or twelfth aspect, the transport means obtains a transport driving force by using heat. That is, the transport means is provided with a container (T) capable of storing the liquid refrigerant and a drive source heat exchanger (90) storing the refrigerant. Drive source heat exchanger (9
0) heating the liquid refrigerant in the container, applying a pressure rising with the evaporation of the refrigerant to the inside of the container (T), pushing out the liquid refrigerant from the container (T), and a driving source heat exchanger. By cooling the gas refrigerant in (90) and applying a pressure descending with the condensation of the gas refrigerant to the inside of the container (T), a suction operation of sucking the refrigerant into the container (T) is performed. It is configured to give a circulation driving force to the refrigerant.

According to this specific matter, it is possible to perform the refrigerant circulation operation in the utilization side circuit means (B) without using a mechanical pump.

The invention according to claims 15 to 17 is directed to the refrigeration apparatus according to claim 11 or 12, wherein the piping (L1, L2)
The collective piping section (L1-0, L2-0) and the collective piping section (L1-0, L2-
0) and a plurality of branch pipes (L1-1) extending toward the use side heat transfer portions (17b to 67b) of the main heat exchangers (17 to 67) corresponding to the respective heat source circuits (11 to 61). ~ L1-6, L2-1 ~ L2-6). In the invention according to claim 15, the conveying means (P1 to P6) are provided in the branch pipes (L2-1 to L2-6). In the invention according to claim 16, the transfer means (P) is provided in the collective piping section (L2-0). According to the seventeenth aspect of the present invention, the conveying means (P1 to P6) are provided in each of the branch pipes (L2-1 to L2-6) and the collective pipe section (L2-0).

According to these specific items, in the invention according to claim 15, it is possible to surely supply the hot or cold heat given from each of the heat source circuits (11 to 61) to the use side heat transfer sections (17b to 67b). In the invention according to the sixteenth aspect, the hot or cold heat given from each of the heat source circuits (11 to 61) can be given to the use-side heat transfer sections (17b to 67b) only by providing them in the transfer means (P). In the invention according to claim 17, the conveying means (P1 to P6) is connected to a branch pipe.
(L2-1 to L2-6) and the collective piping section (L2-0) provide reliable circulation of the refrigerant.

According to an eighteenth aspect of the present invention, in the refrigeration apparatus according to the first aspect, a plurality of heat source circuits are accommodated in one unit casing (C).

According to this specific matter, even when installing a plurality of heat source circuits, it is only necessary to install the unit casing (C), so that the operation can be simplified.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a case will be described in which the present invention is applied to an air conditioner for performing air conditioning of a plurality of air conditioning rooms.

FIG. 1 shows a piping diagram of an air conditioner according to this embodiment. As shown in this figure, in the present air conditioner, two indoor units (70, 80) are connected to a first pipe (L1) and a second pipe (L2) for six outdoor units (10 to 60). That are connected via The outdoor units (10 to 60) and the indoor units (70, 80) are connected to each other in parallel.

First, the outdoor units (10 to 60) will be described. These outdoor units consist of first to sixth outdoor units (10 to 60), each of which is provided with a different heat source device. Specifically, the first outdoor unit
(10) is a compressor (1) driven by a motor (motor) (12).
An electric motor driven vapor compression refrigeration circuit (11) using (3) is provided. The second outdoor unit (20) is a gas engine (22)
And a gas engine driven type vapor compression refrigeration circuit (21) using a compressor (23) driven by a compressor. The third outdoor unit (30) includes an absorption refrigeration circuit (31). The fourth outdoor unit (40) includes a district heating / cooling circuit (41) that receives hot or cold heat from a district heating / cooling heat source plant (not shown).
It has. The fifth outdoor unit (50) includes a boiler (53), and includes a circulation circuit (51) through which a fluid heated by the boiler (53) circulates. Furthermore, the sixth outdoor unit (60)
Has a heat storage tank (67) and a heat storage refrigeration circuit (61) for storing hot or cold heat in the heat storage tank (67).

Hereinafter, a configuration of a circuit provided in each of the outdoor units (10 to 60) will be described. First outdoor unit (10)
The motor-driven vapor compression refrigeration circuit (11) provided in
The compressor (13), a four-way switching valve (14), an outdoor heat exchanger (15),
Heat source side heat transfer tube (17a) of electric expansion valve (16), main heat exchanger (17)
Are connected by a refrigerant pipe (18). Four-way switching valve (1
4) is for switching the refrigerant circulation direction in the refrigeration circuit (11), the compressor (13) in the switching state on the solid line side in the figure
To the outdoor heat exchanger (15), and the suction side to the main heat exchanger (1).
7) Connect to the heat source side heat transfer tube (17a). That is, in this switching state, the refrigerant is condensed by heat exchange between the refrigerant and the outside air in the outdoor heat exchanger (15), and the refrigerant is condensed in the heat source side heat transfer tube (17a) of the main heat exchanger (17). Evaporate. on the other hand,
In the switching state on the broken line side in the figure, the discharge side of the compressor (13) is connected to the heat source side heat transfer tube (17a) of the main heat exchanger (17), and the suction side is connected to the outdoor heat exchanger (15). In this switching state, the refrigerant condenses in the heat source side heat transfer tube (17a) of the main heat exchanger (17), and the refrigerant evaporates due to heat exchange between the refrigerant and the outside air in the outdoor heat exchanger (15). It has become.

The gas engine driven type vapor compression refrigeration circuit (21) provided in the second outdoor unit (20) has substantially the same configuration as the above-mentioned electric motor driven type vapor compression refrigeration circuit (11). That is, the heat source side heat transfer tube (27a) of the compressor (23), the four-way switching valve (24), the outdoor heat exchanger (25), the electric expansion valve (26), and the main heat exchanger (27) is a refrigerant pipe ( 28).

The absorption refrigeration circuit (31) provided in the third outdoor unit (30) includes a pump (32), a regenerator (33), and a separator (3).
4) The condenser (35), the expansion valve (36), the heat source side heat transfer tube (37a) of the main heat exchanger (37), and the absorber (38) are connected by a pipe (39). The circuit (31) employs an aqueous solution of lithium bromide as an absorbent and water as a refrigerant. Thus, a predetermined absorption refrigeration cycle is performed. That is,
The refrigerant vapor evaporated in the heat source side heat transfer tube (37a) of the main heat exchanger (37) is absorbed by the lithium bromide concentrated solution in the absorber (38), and the diluted dilute solution is regenerated by the regenerator (33). Where it is heated and concentrated. The steam generated here is cooled and condensed in the condenser (35), and then decompressed to a heat source side heat transfer tube (3
A circulation operation such as flowing into 7a) is performed. Meanwhile, the regenerator
The absorbent concentrated in (33) is sent to the absorber (38). At this time, the solution sent to the regenerator (33) is heated in a solution heat exchanger (not shown). Heat and absorber of condenser (35) (3
The absorbed heat generated in 8) is recovered by cold water in a cooling water pipe (not shown). Such an absorption refrigeration cycle is performed. The absorption refrigeration circuit (31) is not limited to a single-effect type, and may be a double-effect type.

The district cooling / heating circuit (41) provided in the fourth outdoor unit (40) exchanges heat between the pump (42) and a hot water pipe (or steam pipe) or a cold water pipe (not shown) extending from the heat source plant. Possible heat source heat exchanger (43) and main heat exchanger (47)
The heat source side heat transfer pipe (47a) is connected by a water pipe (45) to form a closed circuit. In other words, the heat source heat exchanger
In (43), hot or cold heat given from a hot water pipe or the like is transferred to the heat source side heat transfer tube (47a) of the main heat exchanger (47). The piping from the heat source plant is connected to the main heat exchanger.
The structure (47) may be used as it is as the heat source side heat transfer tube.

The circulation circuit (51) provided in the fifth outdoor unit (50) includes a pump (52), a boiler (53), and a main heat exchanger (5).
The heat source side heat transfer pipe (57a) of (7) is connected by a water pipe (55) to constitute a closed circuit capable of circulating water. That is, the heat generated by the boiler (53) is transferred to the heat source side heat transfer tube (57a) of the main heat exchanger (57) by hot water.

The heat storage refrigeration circuit (61) provided in the sixth outdoor unit (60) has substantially the same configuration as the above-described motor-driven vapor compression refrigeration circuit (11), and is driven by a motor (62). Equipped with a compressor (63), a four-way switching valve (64), an outdoor heat exchanger (65), and an electric expansion valve (66), and houses a heat source side heat transfer tube (67a) instead of the main heat exchanger A heat storage tank (67) is provided. The heat storage tank (67) stores water as a heat storage material. When the four-way switching valve (64) is switched to the solid line side in the figure and the heat source side heat transfer tube (67a) functions as an evaporator, the water is cooled or iced and cold heat is stored in the heat storage tank (67). ,vice versa,
When the four-way switching valve (64) is switched to the broken line side in the figure and the heat source side heat transfer tube (67a) functions as a condenser, water becomes hot water and heat is stored in the heat storage tank (67). It has become.

Next, the indoor units (70, 80) will be described. Each indoor unit (70, 80) has an indoor heat exchanger (71), (8
1) and motor-operated valves (72), (82) for adjusting the refrigerant flow rate are connected in series.

The first pipe (L1) and the second pipe (L2) are each provided with a branch line (L1-
1 to L1-8) and (L2-1 to L2-8). That is, the first pipe (L1) and the second pipe (L2) are connected to the main lines (L1-0), (L2-
0), and six branch lines (L1-1 to L1-6) branched from the outdoor side of the main lines (L1-0) and (L2-0) and extending to the outdoor units (10 to 60), (L2-1 to L2-6) and each main line (L1-
(0), (L2-0) Branched from the indoor side of each indoor unit (70, 80)
(L1-7, L1-8) and (L2-7, L2-8).

Each of the main heat exchangers (17 to 57) of the first to fifth outdoor units (10 to 50) has a use side heat transfer tube capable of exchanging heat with the heat source side heat transfer tubes (17a to 57a). (17b to 57b) are provided. The heat storage tank (67) of the sixth outdoor unit (60) has a use-side heat transfer tube (6) that can exchange heat with water in the heat storage tank (67).
7b) is housed.

One end of each of these use-side heat transfer tubes (17b to 67b)
The first pipes (L1) are connected to branch lines (L1-1 to L1-6) on the outdoor side, respectively. On the other hand, the other end of each use-side heat transfer tube (17b to 67b) is a branch line (L2-1 to L2-6) on the outdoor side of the second pipe (L2).
Connected to each other. In addition, pumps (P1 to P6) are disposed on branch lines (L2-1 to L2-6) on the outdoor side of the second pipe (L2).

With such a configuration, the refrigeration circuit of the present air conditioner includes a heat source circuit (11 to 61), which is a closed circuit individually configured, an indoor unit (70, 80), and a first pipe (L1 ),
A closed circuit (B) as a use side circuit means according to the present invention, comprising a second pipe (L2), a main heat exchanger (17 to 57) and a use side heat transfer tube (17b to 67b) of a heat storage tank (67). Thus, a multi-type secondary refrigerant system capable of exchanging heat between them is configured. That is, the heat source circuits (11 to 61) constitute the heat source side circuit means (A) according to the present invention. The heat source side circuit means (A) constitutes a heat source side circuit of a so-called secondary refrigerant system, and the closed circuit (B) constitutes a utilization side circuit.

Next, the operation of the present apparatus will be described. In this operation, at least one of the outdoor units (10 to 60) is operated, and the closed circuit on the user side is operated.
Cooling or heating is applied to (B) to cool or heat the room. In other words, during indoor cooling operation, the outdoor unit
(10-60) to the indoor unit (70, 80), and conversely, during indoor heating operation, the outdoor unit (10
60) to the indoor units (70, 80).

The operation of each unit (10 to 60) during the cooling operation will be described. When the refrigeration circuits (11, 21, 61) of the first, second, and sixth units (10, 20, 60) are driven, the four-way switching valve switches (14, 24, 64) to the solid line side. And
The refrigerant discharged from the compressor (13, 23, 63) is supplied to the outdoor heat exchanger (15, 23).
After condensing at 25,65) and reducing the pressure with the electric expansion valve (16,26,66),
A circulation operation such as evaporation in the heat source side heat transfer tubes (17a, 27a, 67a) is performed. That is, the first and second units (10, 2
In (0), the refrigerant exchanges heat with the refrigerant flowing through the use-side heat transfer tubes (17b, 27b) to evaporate. In the sixth unit (60), the refrigerant exchanges heat with water in the heat storage tank (67) to evaporate. Perform circulation operation.

When the absorption refrigeration circuit (31) of the third unit (30) is driven, the refrigerant and the absorbent circulate by driving the pump (32), and a predetermined absorption refrigeration cycle is performed. Thereby, the heat source side heat transfer tube (37a) functions as an evaporator,
Cold heat is given to the refrigerant flowing through the use-side heat transfer tube (47b).

When the district heating / cooling circuit (41) of the fourth unit (40) is driven, water is circulated by driving the pump (42), and this water is supplied from a heat source plant through cold water piping. Receive cold heat. The water that has received the cold heat gives the refrigerant flowing through the use-side heat transfer tube (47b) cold heat through the heat-source-side heat transfer tube (47a).

During the cooling operation, the fifth unit (5
0) is not driven.

In such a driving state of the outdoor units (10 to 40, 60), the pumps (P1 to P4, P6) provided in the branch pipes (L2-1 to L2-4, L2-6) are driven. Heat transfer tube (17b
47b, 67b) and the indoor heat exchanger (71, 81). In other words, use side heat transfer tubes (17b-47b, 67b)
In this case, the indoor heat exchanger (71, 81) applies the cold received from the cold water in the heat source side heat transfer tubes (17a to 47a) or the heat storage tank (67) to the indoor air to cool the room. That is, the gas refrigerant flowing through the first pipe (L1) toward the outdoor unit (10 to 40, 60) is cooled and condensed by the use-side heat transfer tubes (17b to 47b, 67b), and the condensed liquid refrigerant is condensed. The air is supplied to the indoor heat exchangers (71, 81) by the second pipe (L2). Here, the liquid refrigerant exchanges heat with room air, and receives heat from the room air to evaporate. As a result, the room air is cooled. The evaporated refrigerant again flows through the first pipe (L1) toward the outdoor units (10 to 40, 60). The room is continuously cooled by performing such a circulation operation of the refrigerant.

Next, each unit (10
To 60) will be described. When the refrigeration circuits (11, 21, 61) of the first, second and sixth units (10, 20, 60) are driven, the four-way switching valve switches (14, 24, 64) to the broken line side. After the refrigerant discharged from the compressors (13, 23, 63) is condensed in the heat source side heat transfer tubes (17a, 27a, 67a) and decompressed by the electric expansion valves (16, 26, 66), the outdoor heat exchanger A circulation operation such as evaporation at (15, 25, 65) is performed. That is, the first and second units
In (10, 20), the refrigerant flowing through the use-side heat transfer tubes (17b, 27b) exchanges heat with the refrigerant to condense. In the sixth unit (60), the heat storage tank
A circulation operation of exchanging heat with water in (67) to perform condensation is performed.

When the absorption refrigeration circuit (31) of the third unit (30) is driven, the steam generated by the regenerator (33) is directly supplied to the heat source side heat transfer tube (37a), so that the usage side Heat transfer tube
(37b) Gives heat to the refrigerant flowing therethrough.

When the district heating / cooling circuit (41) of the fourth unit (40) is driven, water is circulated by driving the pump (42), and this water is supplied from the heat source plant by hot water piping (or steam piping). Receives the heat of the supplied hot water (or superheated steam). The water that has received this heat gives the refrigerant flowing through the use-side heat transfer tube (47b) warm heat through the heat-source-side heat transfer tube (47a).

When the circulation circuit (51) of the fifth unit (50) is driven, water is circulated by driving the pump (52), and this water is heated by the boiler (53) to become hot water. The hot water is supplied to the use side heat transfer tube (57a) by the heat source side heat transfer tube (57a).
b) Give heat to the refrigerant flowing through it.

In such a driving state of the outdoor units (10 to 60), the pumps (P1 to P6) provided in the branch pipes (L2-1 to L2-6) are driven, and the use side heat transfer tubes (17b 6767b) and the indoor heat exchanger (71, 81). In other words, the heat source side heat transfer tubes (17b-67b)
(17b-57b) or the heat received from the hot water in the heat storage tank (67) is given to room air to contribute to indoor heating. That is, the liquid refrigerant flowing toward the outdoor units (10 to 60) in the first pipe (L1) is heated and evaporated by the use side heat transfer tubes (17b to 67b), and the evaporated gas refrigerant is discharged to the second pipe (L2). ) To supply it to the indoor heat exchangers (71, 81). Here, the gas refrigerant exchanges heat with the room air, gives heat to the room air, and condenses. As a result, the room air is heated. The condensed refrigerant flows again through the first pipe (L1) toward the outdoor units (10 to 60). The room is continuously heated by performing such a circulation operation of the refrigerant.

In the present embodiment, the outdoor unit to be driven can be selectively switched as required, considering the advantages and disadvantages of the six types of heat source devices described above. The advantages and disadvantages of each heat source device are listed below.

-Motor-driven vapor compression refrigerator--Due to the limitation of the power receiving capacity, there is a limit in dealing with an increase in the refrigeration load.

In the case of the air-cooled type, the heating capacity is reduced at low outside air.

The water-cooling type can exhibit stable cooling and heating capabilities. However, cooling water and hot water facilities are required.

-Gas engine driven type vapor compression refrigerator--The whole apparatus becomes large in size compared to a motor driven type.

Since the power receiving capacity is not restricted, it is possible to sufficiently cope with an increase in the refrigeration load.

In the case of the air-cooled type, the heating capacity is reduced at low outside air.

In the case of the water-cooled type, stable performance can be exhibited for both cooling and heating. However, cooling water and hot water facilities are required.

-Absorption type refrigerator-A cooling water system is necessary because a water cooling system is generally used.

Since the power receiving capacity is not restricted, it is possible to cope with an increase in the refrigeration load.

At the time of heating, the same performance as that of the boiler is obtained, and a sufficient heating capacity can be exhibited without being affected by the outside air temperature.

When the outside air temperature is high, the vapor compression refrigerator is more efficient.

-District heating and cooling equipment-Equipment costs are high.

Since the equipment is large-scale, it is difficult to increase the equipment when the refrigeration load increases.

-Boiler-Can be used only during heating operation.

A sufficient heating capacity can be exhibited without being affected by the outside air temperature.

When the outside air temperature is high, the vapor compression refrigerator is more efficient.

-Regenerative refrigerator-The running cost is low because heat is stored using midnight power.

A heat storage tank is required, and the equipment becomes large.

In consideration of the above matters, adoption and operation of each heat source device are selected.

As described above, according to the present embodiment, in a so-called secondary refrigerant system, a plurality of types of heat source devices can be provided, and the heat source device to be used can be selected as needed. For this reason, multiple types of heat source circuits (11 to 61)
By selecting the equipment to be used as a heat source,
It is possible to obtain an optimal heat source according to the situation. In other words, by driving other devices at the same time so as to compensate for the disadvantages of a specific heat source device, efficient operation becomes possible, and energy saving can be achieved. Furthermore, even if the refrigeration load increases, it is possible to respond quickly.

(Modification Example of Arrangement State of Devices) Next, a modification example of the arrangement state of the outdoor units (10 to 60) will be described.
In the above-described embodiment, the six types of heat source devices are individually arranged one by one, and the main heat exchangers (17 to 57) are installed inside each unit.
Alternatively, a heat storage tank (67) is accommodated, and each branch line (L2-1 to L2-
Although the pumps (P1 to P6) are arranged in 6), the following modified example is an improvement of these arrangements.

-First Modification Example- In this example, as shown in FIG. 2, three units (10A, 10B, 10C) each equipped with a motor-driven vapor compression refrigerator (EHP) and a gas engine driven One unit (20) provided with a steam vapor refrigerating machine (GHP) of the type, and one unit (50) provided with a circulation circuit having a boiler. In addition, four indoor units (70A, 70B, 80A, 80B) are connected in parallel. In this example, a pump for obtaining the refrigerant transfer force in the closed circuit on the use side is housed in each unit (10A, 10B, 10C, 20, 50).

Such an arrangement is employed particularly when it is desired to effectively utilize the advantages of a motor-driven vapor compression refrigerator.

-Second Modification- In this embodiment, as shown in FIG. 3, the arrangement of the heat source devices is the same as that of the first modification described above. The feature of this example is that the main heat exchanger (17A-17C) is configured separately from the outdoor unit (10A-50), and the outdoor unit (10A-50) and the main heat exchanger (17A-17C) Are connected by piping.

Such a configuration is employed particularly when there is a restriction on the installation space of the outdoor unit.

Third Modification Example In this example, as shown in FIG. 4, the arrangement of the heat source equipment and the main heat exchanger is the same as that of the second modification example described above.
The feature of this example is that a transfer device (pump) (P) for circulating the refrigerant between the main heat exchanger and the indoor heat exchanger is arranged in the main line (L2-0).

According to this, since the pumps (P1 to P6) are not disposed for each branch line (L2-1 to L2-6) as in the above-described embodiment, the number of pumps is greatly reduced. Thus, the number of parts in the entire apparatus can be reduced.

-Fourth Modification- In this embodiment, as shown in FIG. 5, the arrangement of the heat source equipment, the main heat exchanger and the pump is the same as that of the third modification. The feature of this example is that a pair of electric motor driven vapor compression refrigerators (10A, 10B) are housed in the same unit casing (C). According to this, even when a large number of heat source devices are arranged, the number of outdoor units can be reduced, and the installation work of the device can be simplified.

(Modification of Refrigerant Transport Means on Use Side) Next, a modification of the refrigerant transfer means on the use side will be described.
The above-described embodiment uses a mechanical pump (P1 to P6) to cool the refrigerant between the main heat exchanger (or heat storage tank) (17 to 67) and the indoor heat exchanger (71, 81). Is circulated, but in the following modified example, the conveyance force of the refrigerant is obtained by heating and cooling the refrigerant.

FIG. 6 schematically shows a circuit in which heat is used to obtain a transport driving force. Thus, the first pipe (L1)
Alternatively, connect the tank (T) storing the liquid refrigerant to the second pipe (L2) (the pipe on the side where the liquid refrigerant flows), and connect the pipe to this tank (T).
The driving heat exchanger (90) is connected via (L3). The drive heat exchanger (90) stores a liquid refrigerant. The driving heat exchanger (90) is heated or cooled by a heat source (not shown). In this state, when the drive heat exchanger (90) is heated, the internal refrigerant evaporates and the heat exchanger
The pressure in (90) increases, and this pressure acts on the liquid level of the refrigerant in the tank (T). As a result, the liquid level is pushed down, and the liquid refrigerant in the tank (T) is pushed out to the pipe (L1). Conversely, when the driving heat exchanger (90) is cooled, the refrigerant in the heat exchanger (90) condenses, the internal pressure of the refrigerant drops, 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.

As described above, a plurality of tanks are provided as a further improvement, in which the circulation driving force of the refrigerant is obtained by utilizing the heat. It is also possible to adopt a configuration in which the refrigerant is collected, and this is repeated alternately to enable continuous circulation of the refrigerant.

The outdoor unit (10 to 60) may be used as a heating source and a cooling source of the driving heat exchanger.

Further, the mechanism for obtaining the circulating driving force of the refrigerant by utilizing the heat as described above can also be employed in the circuit on the heat source side. That is, for example, instead of the compressor (13, 23) provided in the refrigeration circuit (11, 21) of the first outdoor unit (10) or the second outdoor unit (20), a tank similar to the above is provided, By extruding and collecting the refrigerant from the tank, the refrigerant may be circulated through the refrigeration circuit (11, 21).

In the above embodiments and modifications, the outdoor heat exchangers (15, 25, 35) of each of the vapor compression refrigeration circuits (11, 21), the absorption refrigeration circuit (31), and the heat storage refrigeration circuit (61). , 65) is configured to perform heat exchange with air, but may be provided with a heat source water pipe so as to perform heat exchange with cold or hot water flowing through the pipe. .

The pumps (P1 to P6) for obtaining the refrigerant circulation driving force in the closed circuit (B) on the use side are connected to the main line (L2-0).
And the branch lines (L2-1 to L2-6).

In the above description, the case where the present invention is applied to an air conditioner has been described. However, the present invention is not limited to this, and can be applied to other refrigeration equipment.

Further, the closed circuit (B) on the use side includes a pump (P1 to P1).
Although the refrigerant circulating in P6) and changing phase with heat exchange is used, water or the like may be used to perform heat transfer without phase change. Further, a configuration is used in which a compressor is used as a conveying means of the closed circuit (B) on the utilization side and a pressure reducing mechanism is provided in the circuit (B), and a vapor compression refrigeration cycle is performed in this closed circuit (B) as well. It may be.

Further, the heat source equipment is not limited to the above-described equipment, and various heat equipment such as a steam injection refrigeration apparatus can be adopted.

[0095]

As described above, according to the present invention, the following effects are exhibited. According to the first aspect of the present invention, the heat source side circuit means (A) and the use side circuit means (B) which can exchange heat with each other are provided.
In the so-called secondary refrigerant system including the above, a heat source circuit (11 to 61) including a plurality of types of different heat source devices is provided on the heat source side. For this reason, by using these heat source circuits (11 to 61) selectively, it becomes possible to use the optimal equipment as needed as the heat source. In other words, by driving other devices at the same time so as to compensate for the disadvantages of a specific heat source device, efficient operation becomes possible, and energy saving can be achieved. Furthermore, even if the refrigeration load increases, it is possible to respond quickly. As a result, it is possible to commercialize an optimal heat source-side facility that could not be realized because each heat source device has its own advantages and disadvantages.

According to the second to seventh aspects of the present invention, each heat source circuit
The heat source equipment constituting (11 to 61) has been embodied. In particular, when a vapor compression refrigerator is employed as in the third or fourth aspect of the invention, high reliability of the apparatus can be ensured. When an absorption refrigerator is employed as in the fifth aspect of the present invention, it is not necessary to use a refrigerant such as chlorofluorocarbon, so that a heat source suitable for global environmental problems and the like can be realized.
When a regenerative refrigerator is employed as in the invention of claim 6, inexpensive energy such as nighttime electric power can be used at the time of heat storage, and the running cost can be reduced. A boiler according to the invention of claim 7 is provided.
When a circulation circuit with (53) is adopted, it becomes possible to reliably apply heat to the use side circuit means (A) without being affected by the outside air temperature, and to improve heating performance. it can. Further, when a district heating / cooling circuit is employed as in the eighth aspect of the invention, a relatively large amount of heat can be easily secured, and it is possible to cope with a large refrigeration load. That is, according to the present invention, it is possible to select a heat source device to be driven according to a situation so as to effectively use the advantages of each of the heat source devices.

In the ninth and tenth aspects of the present invention, the medium that exchanges heat with the fluid circulating in the heat source circuit is specified in the heat source side heat exchangers (15, 25, 35). That is, in the invention according to claim 9, the fluid exchanges heat with the outside air in the heat source side heat exchangers (15, 25, 35). On the other hand, in the invention according to claim 10, the fluid exchanges heat with water. For this reason, according to the ninth aspect of the invention, it is possible to apply hot or cold heat to the fluid circulating in the heat source circuit with a relatively simple configuration, thereby improving the practicality of the device. According to the tenth aspect of the present invention, by using water, almost no influence of the outside air temperature is exerted,
Hot or cold heat can be reliably applied to the fluid circulating in the heat source circuit, and refrigeration performance can be improved.

The invention according to claim 11 is the use-side circuit means.
The conveying means (P1 to P6) for obtaining the refrigerant circulation driving force in (B) are arranged on the pipe on the side where the liquid refrigerant flows. In the twelfth aspect of the present invention, the conveying means (P1 to P6) are arranged on the pipe on the side where the gas refrigerant flows. Thereby, the arrangement positions of the transporting means (P1 to P6) can be embodied.

According to a thirteenth aspect of the present invention, there is provided a user side circuit means.
The transfer means (P1 to P6) for obtaining the refrigerant circulation driving force in (B) is an electric motor driven pump. Thereby, the user side circuit means
Refrigerant circulation in (B) can be reliably performed, and the reliability of the device can be improved.

According to the fourteenth aspect of the present invention, the circulation driving force of the refrigerant is obtained by extruding the refrigerant from the container (T) and sucking the refrigerant by pressurizing and depressurizing the container (T) storing the liquid refrigerant. I did it. This makes it possible to perform the refrigerant circulation operation in the use side circuit means (B) without using a mechanical pump.

According to a fifteenth aspect of the present invention, the conveying means (P1 to P
6) is provided in each of the branch pipes ((L2-1 to L2-6) of the use side circuit means (B), so that the hot or cold heat given from each heat source circuit (11 to 61) is used on the use side. Heat can be reliably applied to the heat transfer sections (17b to 67b), and the refrigeration capacity can be reliably exhibited.

According to a sixteenth aspect of the present invention, the conveying means (P)
Was provided in the collective piping section (L2-0) of the utilization side circuit means (B).
Thereby, the hot or cold heat given from each heat source circuit (11 to 61) can be given to the use-side heat transfer sections (17b to 67b) only by providing one transfer means (P), and the number of parts is reduced. Therefore, the configuration of the entire apparatus can be simplified and the cost can be reduced.

The invention according to claim 17 is characterized in that the conveying means (P1 to P
6) was provided in each of the branch pipes (L2-1 to L2-6) and the collective piping section (L2-0). This makes it possible to more reliably perform the circulation operation of the refrigerant.

According to the eighteenth aspect, a plurality of heat source circuits are accommodated in one unit casing (C). For this reason, even when installing a plurality of heat source circuits, only the unit casing (C) needs to be installed, so that the operation can be simplified and the operation time can be shortened.

[Brief description of the drawings]

FIG. 1 is a piping system diagram of an air conditioner according to an embodiment.

FIG. 2 is a piping system diagram in a first modified example.

FIG. 3 is a piping system diagram in a second modified example.

FIG. 4 is a piping system diagram in a third modified example.

FIG. 5 is a piping system diagram in a fourth modified example.

FIG. 6 is a view showing a modified example of the refrigerant conveying means.

[Explanation of symbols]

 (A) Heat source side circuit means (B) User side circuit means (C) Casing (11,21) Vapor compression refrigeration circuit (12) Motor (motor) (13,23) Compressor (15-65) Outdoor heat exchanger (Heat source side heat exchanger) (16,26,36) Electric expansion valve (Decompression mechanism) (17-57) Main heat exchanger (18-28) Refrigerant pipe (17a-67a) Heat source side heat transfer tube (Heat source side transfer (Heat section) (17b-67b) Use side heat transfer tube (use side heat transfer section) (22) Gas engine (31) Absorption refrigeration circuit (33) Regenerator (35) Condenser (heat source side heat exchanger) (38) ) Absorber (41) District heating and cooling circuit (51) Circulation circuit (53) Boiler (61) Thermal storage refrigeration circuit (67) Thermal storage tank (P1 to P6) Pump (transportation means) (L1-0, L2-0) Main line (Collecting piping section) (L1-1 ~ L2-8) Branch line (branch pipe)

Claims (18)

[Claims] 1. A heat source side circuit means (A) and a use side circuit means (B)
And a main heat exchanger for the fluid flowing through each circuit means (A, B).
In the refrigerating apparatus configured to transfer heat between the circuit means (A, B) by heat exchange in (17 to 67), the heat source side circuit means (A) includes a plurality of heat sources each individually forming a closed circuit. (11-61), and at least one of the heat source circuits (11-61) is made of a different type of heat source device from at least one other heat source circuit. Refrigeration equipment. 2. The refrigeration apparatus according to claim 1, wherein, of the heat source circuits (11 to 61), a heat source circuit (11), which is a heat source device of a type different from at least one other heat source circuit.
(12) is the heat source side heat exchanger (15), (25) and the main heat exchanger (17), (2
7) The heat source side heat transfer section (17a), (27a) and the refrigerant pipes (18), (28) in a closed circuit connected refrigerant circulating,
A refrigeration apparatus comprising a transport unit for applying a circulating drive force to the refrigerant in the closed circuit. 3. The refrigeration apparatus according to claim 2, wherein, of the heat source circuits (11 to 61), a heat source circuit (11) comprising a heat source device of a type different from at least one other heat source circuit.
Is a motor-driven vapor compression refrigerator comprising a compressor (13) whose transport means is driven by an electric motor (12). 4. The refrigerating apparatus according to claim 2, wherein, of the heat source circuits (11 to 61), a heat source circuit (21) comprising a heat source device of a type different from at least one other heat source circuit.
Is a compressor driven by a gas engine (22)
A refrigerating apparatus, characterized in that the refrigerating apparatus is a gas engine driven type vapor compression refrigerating machine according to (23). 5. The refrigeration apparatus according to claim 1, wherein the heat source circuit comprises a heat source device of a type different from at least one other heat source circuit among the heat source circuits.
Comprises at least a regenerator (33), a heat source side heat exchanger (35), a pressure reducing mechanism (36), a heat source side heat transfer section (37a) of a main heat exchanger (37), and an absorber (38). Is an absorption refrigerator connected to a refrigerant pipe (39) so as to be able to circulate the refrigerant and perform an absorption refrigeration cycle. 6. The refrigeration apparatus according to claim 1, wherein the heat source circuit comprises a heat source device of a different type from at least one other heat source circuit among the heat source circuits.
Has a heat storage tank (67) as a main heat exchanger storing a heat storage material, and stores cold or warm heat in the heat storage material by heat exchange between the refrigerant circulating in the circuit (61) and the heat storage material. A refrigerating apparatus characterized in that it is a regenerative refrigerator that provides hot or cold heat to the use side circuit means (B). 7. The refrigerating apparatus according to claim 1, wherein, of the heat source circuits (11 to 61), a heat source circuit (51) comprising a heat source device of a different type from at least one other heat source circuit.
Is a refrigeration apparatus comprising a boiler (53) and a circulation circuit for circulating a fluid heated by the boiler (53). 8. The refrigeration apparatus according to claim 1, wherein, of the heat source circuits (11 to 61), a heat source circuit (41) comprising a heat source device of a type different from at least one other heat source circuit.
A refrigeration apparatus characterized in that the refrigeration apparatus is a district heating / cooling circuit that supplies hot or cold heat from a heat source plant for district heating / cooling to the use side circuit means (B) via the main heat exchanger (47). 9. The refrigeration apparatus according to claim 2, wherein the heat source side heat exchanger (15, 25, 35) is a heat exchanger that exchanges heat with outside air. A refrigeration apparatus characterized by the above-mentioned. 10. The refrigeration apparatus according to claim 2, further comprising a heat source water pipe, wherein the heat source side heat exchanger (15, 25, 35) includes a water source flowing through the heat source water pipe. A refrigeration apparatus that is a heat exchanger that exchanges heat with the refrigeration apparatus. 11. The refrigeration apparatus according to claim 1, wherein the fluid flowing through the use side circuit means (B) is heat source side circuit means (A).
Is a refrigerant that changes phase by performing heat exchange between the main heat exchanger (17-67) and the use-side heat transfer section (17b-67b) of the main heat exchanger (17-67). Exchanger (71,81) is the first
The conveyance means (P1 to P6) which is connected by a pipe (L1) and a second pipe (L2) to form a closed circuit and provides the refrigerant with a circulating drive force includes a first pipe (L1) and a second pipe (L2) A refrigeration apparatus characterized by being disposed on the side on which a liquid refrigerant flows. 12. The refrigeration apparatus according to claim 1, wherein the fluid flowing through the use side circuit means (B) is a heat source side circuit means (A).
Is a refrigerant that changes phase by performing heat exchange between the main heat exchanger (17-67) and the use-side heat transfer section (17b-67b) of the main heat exchanger (17-67). Exchanger (71,81) is the first
The conveyance means (P1 to P6) which is connected by a pipe (L1) and a second pipe (L2) to form a closed circuit and provides the refrigerant with a circulating drive force includes a first pipe (L1) and a second pipe (L2) A refrigeration apparatus characterized by being disposed on the side on which a gas refrigerant flows. 13. The refrigerating apparatus according to claim 11, wherein the conveying means (P1 to P6) is a motor-driven pump. 14. The refrigeration apparatus according to claim 11, wherein the transfer means includes a container (T) capable of storing a liquid refrigerant, a drive source heat exchanger (90) storing the refrigerant, and a drive source heat exchanger. The liquid refrigerant in the vessel (90) is heated, and a pressure that increases with the evaporation of the refrigerant is applied to the container (T) to push out the liquid refrigerant from the container (T). The gas refrigerant in the exchanger (90) is cooled, and a pressure descending with the condensation of the gas refrigerant is applied to the container (T) to perform a suction operation of sucking the refrigerant into the container (T). A refrigeration apparatus for applying a circulating drive force to the refrigerant. 15. The refrigeration apparatus according to claim 11, wherein the pipes (L1, L2) are provided with a collective pipe section (L1-0, L2-0) and the collective pipe section (L1-0, L2-0). ), And a plurality of branch pipes (L1-1 to L1-1) extending toward the use side heat transfer portions (17b to 67b) of the main heat exchangers (17 to 67) corresponding to the respective heat source circuits (11 to 61). (L1-6, L2-1 ~ L2-6)
A refrigerating apparatus, wherein the transporting means (P1 to P6) are provided in the branch pipes (L2-1 to L2-6), respectively. 16. The refrigeration apparatus according to claim 11, wherein the pipes (L1, L2) are provided with a collective pipe section (L1-0, L2-0) and the collective pipe section (L1-0, L2-0). ), And the use side heat transfer sections (17b-6) of the main heat exchangers (17-67) corresponding to the respective heat source circuits (11-61).
7b) a plurality of branch pipes (L1-1 to L1-6, L2-1)
L2-6), and the transporting means (P1 to P6) are provided in the collective piping section (L2-0). 17. The refrigeration apparatus according to claim 11, wherein the pipes (L1, L2) are connected to a collective pipe section (L1-0, L2-0) and the collective pipe section (L1-0, L2-0). ), And a plurality of branch pipes (L1-1 to L1-1) extending toward the use side heat transfer portions (17b to 67b) of the main heat exchangers (17 to 67) corresponding to the respective heat source circuits (11 to 61). (L1-6, L2-1 ~ L2-6)
A refrigerating apparatus, wherein the transfer means (P1 to P6) are provided in each of the branch pipes (L2-1 to L2-6) and the collective pipe section (L2-0). 18. The refrigerating apparatus according to claim 1, wherein a plurality of heat source circuits are accommodated in one unit casing (C).