JP2001147033A - Ice storage / heat pump type air conditioning system - Google Patents

Abstract

(57) [Summary] A heat pump air conditioning system has been proposed in which a running cost is reduced by switching a gas engine and an electric motor day and night to drive a compressor constituting a heat pump system. Since the components of the heat pump system, such as the compressor, are integrally configured as an outdoor unit, a new device design is required, and there is a problem that the cost is increased. Therefore, in the present invention, an ice heat storage tank, an outdoor unit having an air-cooled heat pump package, and an outdoor unit having a gas engine heat pump package are separately installed, and first and second ice storage tanks are provided in the ice heat storage tank. Heat exchange refrigerant paths 6a, 6
b, the refrigerant path of the outdoor unit 1 is connected to the heat exchange refrigerant path 6a in the ice heat storage tank, and the refrigerant path of the outdoor unit 3 is connected to the second heat exchange refrigerant path and the refrigerant path to the indoor unit. The present invention proposes an ice heat storage / heat pump type air conditioning system that has a configuration in which the heat exchange refrigerant path 6b is connected in series and a bypass path 11 that bypasses the heat exchange refrigerant path 6b, and a switching valve mechanism 12 that switches between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice storage / heat pump type air conditioning system.

[0002]

2. Description of the Related Art Electric power leveling is a social demand, and it is necessary to reduce the power load difference between day and night in order to stably supply energy and reduce energy costs.
As a method of shifting electric power to night, there is a heat storage method at present, and recently, it is provided as an air-cooled heat pump package having an inexpensive ice heat storage tank. The air-cooled heat pump package provided with the ice heat storage tank performs ice heat storage using electric power at night and uses it in the daytime to increase the cooling capacity. The ice heat storage tank stores heat (cold heat) literally in the form of ice during cooling operation, but can store heat as hot water during heating operation. On the other hand, a gas engine heat pump package in which a heat pump system is configured by a compressor driven by a gas engine has recently been developed and provided as a method of peak cutting power.

[0003] The present invention combines the essentials of these two methods of peak shift and peak cut,
The purpose of the present invention is to aim at a larger peak shift and a peak cut of electric power, and to significantly reduce running costs.

[0004] In this regard, the present inventor has previously proposed a heat pump air conditioning system in which the running cost is reduced by switching between a gas engine and an electric motor day and night to drive a compressor constituting a heat pump system. (See JP-A-10-78248.)

[0005]

However, in the above-mentioned system, since the components constituting the heat pump system such as the gas engine and the electric motor and the compressor are integrally formed as an outdoor unit, a new device design is required and the cost is increased. There was a problem that. Therefore, an object of the present invention is to solve such a problem.

[0006]

In order to solve the above-mentioned problems, according to the present invention, as a first configuration, an air-cooled heat pump package which is an air conditioning system including an ice heat storage tank and a compressor driven by an electric motor as elements. A first outdoor unit and a second outdoor unit of a gas engine heat pump package, which is an air conditioning system including a compressor driven by a gas engine, are separately installed, and the first and second heats are stored in an ice heat storage tank. The refrigerant path of the first outdoor unit is connected to the first heat exchange refrigerant path in the ice storage tank, and the refrigerant path of the second outdoor unit is connected to the second refrigerant path in the ice storage tank. We propose an ice storage / heat pump type air conditioning system that is connected in series to the heat exchange refrigerant path and the refrigerant path to the indoor unit.

According to a second aspect of the present invention, an ice heat storage tank, a first outdoor unit of an air-cooled heat pump package which is an air conditioning system including a compressor driven by an electric motor, and a compressor driven by a gas engine are included. In addition to separately installing the second outdoor units of the gas engine heat pump package as the air conditioning system, first and second heat exchange refrigerant paths are formed in the ice heat storage tank corresponding to the first outdoor units, respectively. The refrigerant path of the outdoor unit is connected in parallel to a first heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the first indoor unit, and constitutes a switching valve mechanism for switching between them. The present invention proposes an ice storage / heat pump type air conditioning system having a configuration in which a refrigerant path of an outdoor unit is connected in series to a second heat exchange refrigerant path in an ice storage tank and a refrigerant path to a second indoor unit.

According to a third aspect of the present invention, an ice heat storage tank, a first outdoor unit of an air-cooled heat pump package which is an air conditioning system including a compressor driven by an electric motor, and a compressor driven by a gas engine are included. In addition to separately installing the second outdoor units of the gas engine heat pump package as the air conditioning system, first and second heat exchange refrigerant paths are formed in the ice heat storage tank corresponding to the first outdoor units, respectively. The refrigerant path of the outdoor unit is configured to be connectable in series and in parallel by a switching valve mechanism to a first heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the first indoor unit by a second valve. The refrigerant route of the outdoor unit is the second in the ice heat storage tank.
The present invention proposes an ice storage / heat pump type air conditioning system connected in series to the heat exchange refrigerant path of the first embodiment and the refrigerant path leading to the second indoor unit.

According to the present invention, in the above configuration,
The present invention proposes an ice heat storage / heat pump type air conditioning system in which a bypass path that bypasses a second heat exchange refrigerant path is configured and a switching valve mechanism that switches between them is configured.

In the above structure, the switching valve mechanism corresponding to the second heat exchange refrigerant path includes, for example, an on-off valve provided in the bypass path, and both ends of the bypass path and both ends of the second heat exchange refrigerant path. And on-off valves respectively provided between them.

[0011] In the second configuration, the switching valve mechanism corresponding to the first heat exchange refrigerant path includes on-off valves corresponding to both sides of the first heat exchange refrigerant path and a first indoor unit. Open / close valves corresponding to each of the two sides of the refrigerant path.

In the second configuration, the first outdoor unit is configured as a cooling only unit or a cooling / heating switching unit, and the switching valve mechanism corresponding to the first heat exchange refrigerant path includes a first heat exchange refrigerant path. And an on-off valve corresponding to the outgoing side of the refrigerant path of the first indoor unit.

[0013] In the third configuration, the first heat exchange refrigerant paths are connected to both ends of the refrigerant path of the first outdoor unit, on-off valves are respectively provided, and the first heat exchange refrigerant path is connected to the first heat exchange refrigerant paths. A bypass path is provided on the first outdoor unit side with respect to the on-off valve, and an on-off valve is provided on the bypass path, and an on-off valve is provided on one side of a refrigerant path of the first outdoor unit, and both ends of the on-off valve A switching valve mechanism can be configured by connecting a refrigerant path to the first indoor unit and providing an on-off valve in the refrigerant path.

Further, in the above configuration, the first and second heat exchange refrigerant paths can be constituted by a pair of pipes arranged in parallel.

According to the present invention described above, the heat is stored in the ice heat storage tank by the operation of the air-cooled heat pump package, and this is used during the operation of the gas engine heat pump package.
Since air conditioning can be performed by the indoor unit connected to the system, the peak shift of the air-cooled heat pump package equipped with an ice storage tank and the peak cut method of the gas engine heat pump package can be rationally combined to achieve a higher power peak. Shift and peak cut can be achieved.

When the air-cooled heat pump package and the gas engine heat pump package are combined, the outdoor units are separately installed, so that a new design is not required unlike the case where they are integrally formed, and the cost is very low. Can be.

The heat exchange refrigerant paths for the refrigerant of the air-cooled heat pump package and the gas engine heat pump package to exchange heat with the heat storage medium in the ice heat storage tank are first and second.
Since the heat exchange refrigerant paths are separately configured, the respective refrigerants and oils do not mix, and each heat pump operation can be performed optimally.

An indoor unit can also be connected to the air-cooled heat pump package to perform air-conditioning by using the indoor unit, so that the air-cooled heat pump package can be effectively used.

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of an ice storage / heat pump type air conditioning system according to the present invention. FIG. 1 is an explanatory diagram of the entire system, and FIG.
And FIG. 3 is a schematic diagram of a refrigerant circuit of a second outdoor unit. Reference numeral 1 denotes an outdoor unit of an air-cooled heat pump package which is an air conditioning system including a compressor 2a driven by an electric motor (not shown), and is hereinafter referred to as a first outdoor unit. This first outdoor unit 1
As shown in FIG. 2, the compressor 2a, a four-way valve 20, an outdoor heat exchanger 21, an outdoor fan 22, and other necessary elements such as an accumulator (not shown) are built in. It is connected to an ice heat storage tank described later via the refrigerant paths 7u and 7v. Reference numeral 3 denotes an outdoor unit of a gas engine heat pump package which is an air conditioning system including a compressor 2b driven by a gas engine 4, and is hereinafter referred to as a second outdoor unit.
As shown in FIG. 3, the second outdoor unit 3 includes a compressor 2 b driven by a gas engine 4, a four-way valve 30,
It incorporates an outdoor heat exchanger 31, an outdoor fan 32, and other necessary elements, and is connected to an ice heat storage tank described later via refrigerant paths 8u and 8v. Reference numeral 5 denotes an ice heat storage tank. The ice heat storage tank 5 has two heat exchange refrigerant paths passing through the tank. That is, the first and second heat exchange refrigerant paths 6a and 6b are formed in the ice heat storage tank 5.
These first and second heat exchange refrigerant paths 6a and 6b are constituted by, for example, a pair of pipes arranged in parallel, and are also independent of each other and capable of exchanging heat with the heat storage medium in the ice heat storage tank 5. If so, it can be configured appropriately. First and second above
Of the outdoor units 1 and 3 and the ice heat storage tank 5 are separately installed. Then, the refrigerant paths 7u and 7v of the first outdoor unit 1 are
Connected to the first heat exchange refrigerant path 6a in the
The refrigerant paths 8u and 8v of the outdoor unit 3 are the second heat exchange refrigerant path 6b in the ice heat storage tank 5 and the refrigerant path 10 reaching the indoor unit 9.
u, 10v are connected in series. That is, the refrigerant paths 8u and 8v of the second outdoor unit 3 are connected to one side 8u by the ice heat storage tank 5
Connected to one side 10u of the refrigerant path to the indoor unit 9 via the second heat exchange refrigerant path 6b in the inside, and to the other side 8u.
v is connected to the other side 10v of the refrigerant path to the indoor unit 9. Further, in this embodiment, a bypass path 11 that bypasses the second heat exchange refrigerant path 6b is formed, and a switching valve mechanism 12 that switches between them is formed. Although not shown, the indoor unit 9 includes an indoor heat exchanger and an expansion valve. Further, in this embodiment, the switching valve mechanism 12 includes the bypass path 11
, And on-off valves 12b and 12c respectively provided between both ends of the bypass path 11 and both ends of the second heat exchange refrigerant path 6b. The switching valve mechanism 12 can also be configured using a three-way valve or the like.

In the above configuration, at night, the on-off valves 12a, 12b and 12c are closed, and only the first outdoor unit 1 is operated. In this operation state, the four-way valve 20 is set to the state indicated by the solid line, and the operation of the heat pump system including the compressor 2a of the first outdoor unit 1 as an element causes
As shown by solid arrows (see FIGS. 1 and 2), the refrigerant flows between the refrigerant path 7 and the first heat exchange refrigerant path 6a of the ice heat storage tank 5.
The refrigerant circulates through u and 7v, and during the cooling period,
Heat is exchanged with the heat exchange refrigerant path 6a to form ice in the ice heat storage tank 5 and heat is stored. (If such a heat storage operation is to be performed during the heating period, the four-way valve 20 is set in a broken line state and the refrigerant flows as indicated by a broken line arrow, so that hot water is produced in the ice heat storage tank 5. Heat is stored.)
When room air conditioning is required during the heat storage in the ice heat storage tank 5 at night as described above, the second outdoor unit 3 is operated by opening the on-off valve 12a and the heat pump including the compressor 2b as an element. When the system is operated, the refrigerant bypasses the second heat exchange refrigerant path 6b of the ice heat storage tank 5 and flows through the refrigerant path 8 as shown by solid arrows (see FIGS. 1 and 3).
u can be passed through the bypass path 11 to the refrigerant path 10u to the indoor unit 9, and thus the indoor unit 9 is used for indoor air conditioning and the air-conditioned refrigerant is:
The refrigerant flows back to the second outdoor unit 3 via the refrigerant paths 10v and 8v. In addition, the on-off valve 12a may be always opened in the nighttime heat storage operation, or may be opened as needed in the nighttime heat storage operation.

Next, in the daytime when air conditioning is performed, the ice heat storage tank 5 is used.
When performing air-conditioning operation using the heat storage in the
The second outdoor unit 3 is operated by closing 2a and opening the on-off valves 12b and 12c. In this operating state, the refrigerant is moved from the refrigerant path 8u by the operation of the heat pump system including the compressor 2b of the second outdoor unit 3 as an element, as shown by a chain line arrow in FIG. 1 (solid line arrow in FIG. 3). After reaching the second heat exchange refrigerant path 6b in the ice heat storage tank 5 through the open / close valve 12b, the second heat exchange refrigerant path 6b exchanges heat with the heat storage medium and is supercooled. Is supplied from the refrigerant path 10u to the indoor unit 9 to be cooled. Thus, the cold heat stored in the ice heat storage tank 5 at night can be effectively used for cooling at daytime. The refrigerant provided for cooling in the indoor unit 9 then returns to the second outdoor unit 3 via the refrigerant paths 10v and 8v, and is provided for circulation. Although the above description is about the operation in the cooling period, the heat stored in the ice heat storage tank 5 in the form of warm water at night can be effectively used in the daytime also in the heating period as described above.

In the daytime when air conditioning is performed, the on-off valves 12b and 12c may be closed and the on-off valve 12a may be opened to perform an air-conditioning operation that does not use the heat storage in the ice heat storage tank 5 in some cases. it can.

In the embodiment described above, the bypass path 11 and the switching valve mechanism 12 are formed. However, during the heat storage at night, the outdoor unit of the gas engine heat pump package, that is, the operation of the second outdoor unit 3 is performed. When the function of performing indoor air conditioning is unnecessary, the bypass path 11 and the like are unnecessary.

Further, in the above embodiments, the air-cooled heat pump package is described as a configuration capable of cooling and heating operation. However, it can be configured by a cooling-only machine. In such a configuration, heat is not stored as hot water in the ice heat storage tank 5 during the heating period, and heat is stored only as ice in the ice heat storage tank 5 during the cooling period.
Generally, gas engine heat pump packages have a large heating capacity, so the heating capacity does not decrease much,
Rather, there is an advantage that the COP does not decrease due to hot water heat storage and an advantage that the configuration of the entire system is simplified.

Next, FIG. 4 is a system explanatory view showing a second embodiment of the ice heat storage / heat pump type air conditioning system of the present invention. Elements similar to those of the first embodiment shown in FIG. Are denoted by the same reference numerals, and redundant description will be omitted. That is, in this embodiment, in the first embodiment,
In addition to the indoor unit 9 installed corresponding to the second outdoor unit 3, another indoor unit 41 is installed corresponding to the first outdoor unit 1. The other indoor unit 41 is the one described earlier as the first indoor unit, and the indoor unit 9 is also described previously as the second indoor unit. In the second embodiment, the refrigerant paths 7u and 7v of the first outdoor unit 1 are connected to the first heat exchange refrigerant path 6 in the ice heat storage tank 5.
a and refrigerant paths 42u and 42v reaching the first indoor unit 41
And a switching valve mechanism 43 for switching between them. In this embodiment, the switching valve mechanism 43 includes on-off valves 43a and 43b respectively corresponding to both sides of the first heat exchange refrigerant path 6a, and a first indoor unit 41.
Open / close valves 43c and 43d respectively corresponding to both sides of the refrigerant paths 42u and 42v.

In the above configuration, the on-off valve 43 is used at night.
c, 43d are closed, and the on-off valves 43a, 43b are opened,
By operating the outdoor unit 1 of the first embodiment, the refrigerant is supplied to the first heat exchange refrigerant path 6a in the ice heat storage tank 5 as indicated by a solid arrow in the figure.
And the heat is stored in the ice heat storage tank 5. In the daytime, the on-off valves 43a and 43b are closed and the on-off valves 43c and 43c are closed.
When the first outdoor unit 1 is operated with d open, the refrigerant flows through the refrigerant paths 42u and 42v as indicated by the dashed arrows in the figure.
After that, air can be flown to the first indoor unit 41 to perform air conditioning. Therefore, in the second embodiment, during the daytime, the second
By operating the outdoor unit 3, air conditioning using the heat storage in the ice heat storage tank 5 can be performed via the second indoor unit 9,
The operation of the outdoor unit 1 can be performed via the first air conditioner 41.

FIG. 5 is a system explanatory view showing a third embodiment of the ice heat storage / heat pump type air conditioning system of the present invention. The same elements as those of the second embodiment shown in FIG. Are denoted by the same reference numerals, and redundant description will be omitted. That is, in this embodiment, the first outdoor unit 1 is configured as a cooling only unit, and the switching valve mechanism 43 includes an on-off valve 43a corresponding to the outgoing side of the first heat exchange refrigerant path 6a, On-off valve 43 corresponding to the outgoing side 42u of the refrigerant path of the indoor unit 41
c.

In this configuration, during the night time, the first outdoor unit 1 is operated with the on-off valve 43c closed and the on-off valve 43a opened, so that the refrigerant is stored in the ice heat storage tank 5 as indicated by the solid line arrow in the figure. Flowing through the first heat exchange refrigerant path 6a
Can store heat. In the daytime, the on-off valve 43a
Is closed and the open / close valve 43c is opened to operate the first outdoor unit 1, whereby the refrigerant flows to the first indoor unit 41 via the refrigerant paths 42u and 42v as indicated by the dashed arrows in FIG. It can be carried out. Therefore, similarly to the second embodiment, during the daytime, the operation of the second outdoor unit 3 causes the ice heat storage tank 5 to operate.
Air conditioning using the internal heat storage can be performed via the second indoor unit 9 and, at the same time, can be performed via the first air conditioner 41 by operating the first outdoor unit 1.

Next, FIG. 6 is a system explanatory view showing a fourth embodiment of the ice heat storage / heat pump type air conditioning system of the present invention, and is similar to the elements of the second embodiment shown in FIG. Are denoted by the same reference numerals, and redundant description will be omitted. That is, in this embodiment, the refrigerant path 7 of the first outdoor unit 1
u, 7v are the first heat exchange refrigerant paths 6a in the ice heat storage tank 5.
And the refrigerant paths 42u and 42v leading to the first indoor unit 41 can be connected in series and in parallel by a switching valve mechanism. Specifically, the refrigerant paths 7u and 7 of the first outdoor unit 1
v, the first heat exchange refrigerant path 6a is connected to both ends, and open / close valves 44a, 44b are provided respectively, and the bypass path 45 of the first heat exchange refrigerant path 6a is connected to the open / close valves 44a, 44a.
The open / close valve 44c is provided on the bypass path 45 on the first outdoor unit 1 side with respect to the first outdoor unit 1 and the open / close valve 44d is provided on one side 7v of the refrigerant path of the first outdoor unit 1 and the open / close valve 44d. The refrigerant paths 42u, 42v leading to the first indoor unit 41 are connected to both ends of the refrigerant path 42u.
On / off valves 44e and 44f are provided in 2v, and these constitute a switching valve mechanism 44.

In this configuration, at night, the on-off valves 44a, 4a
By operating the first outdoor unit 1 by opening 4b, 44d and closing the on-off valves 44c, 44e, 44f, the refrigerant
The heat can be stored in the ice heat storage tank 5 by flowing through the first heat exchange refrigerant path 6a in the ice heat storage tank 5 as indicated by a solid arrow in the drawing. In the daytime, on the contrary, the on-off valves 44a, 44
By operating the first outdoor unit 1 by closing the b and 44d and opening the on-off valves 44c, 44e and 44f, the refrigerant flows through the first indoor unit via the refrigerant paths 42u and 42v as indicated by broken arrows in the figure. Air conditioning can be performed by flowing the air to the machine 41. Further, in this configuration, in the daytime, the on-off valves 44c, 44c
d, and all other on-off valves 44a, 44b, 44
By opening e and 44f, the first heat exchange refrigerant path 6a and the refrigerant paths 42u and 42 reaching the first indoor unit 41 are opened.
v can be connected in series, so that the operation of the first outdoor unit 3 allows air conditioning using the heat storage in the ice heat storage tank 5 to be performed via the first indoor unit 41. Therefore,
In this embodiment, by operating the second outdoor unit 3 in the daytime, air conditioning using the heat storage in the ice heat storage tank 5 can be performed via the second indoor unit 9, and at the same time, the first outdoor unit 1 The operation can be performed via the first air conditioner 41. At this time,
If necessary, air conditioning using the heat storage in the ice heat storage tank 5 can be performed via the first indoor unit 41. In this operation, the power consumption reduction operation of the first outdoor unit 1 in the air conditioning through the first indoor unit 41 becomes possible.

[0031]

As described above, the present invention rationally combines an air-cooled heat pump package having an ice heat storage tank and a gas engine heat pump package having a heat pump system constituted by a compressor driven by a gas engine. Has a significant effect. a. At night, low-temperature electricity is used to store heat (including cold energy) in the ice heat storage tank, and in the daytime, peak electricity is cut using a low cooling gas rate, and at the same time, the ice heat storage tank is used at night. The air conditioning capacity can be increased by effectively utilizing the heat stored in the air conditioner. b. The outdoor unit comes with an air-cooled heat pump package,
Since the gas engine heat pump package is installed separately, unlike the gas engine and the components that constitute the heat pump system such as the electric motor and compressor as an outdoor unit, no new equipment design is required and the cost is reduced. cheap. c. Since the heat exchange refrigerant paths for the air-cooled heat pump package and the gas engine heat pump package refrigerant to exchange heat with the heat storage medium in the ice heat storage tank are separately configured as first and second heat exchange refrigerant paths, Each heat pump operation can be optimally performed without each refrigerant and oil being mixed. d. An indoor unit can also be connected to the air-cooled heat pump package to perform air-conditioning by using the indoor unit, so that the air-cooled heat pump package can be effectively used.

[Brief description of the drawings]

FIG. 1 is an overall system explanatory diagram showing a first embodiment of an ice heat storage / heat pump air conditioning system according to the present invention.

FIG. 2 is a schematic diagram of a refrigerant circuit of the first outdoor unit.

FIG. 3 is a schematic diagram of a refrigerant circuit of a second outdoor unit.

FIG. 4 is an overall system explanatory diagram showing a second embodiment of the ice heat storage / heat pump type air conditioning system of the present invention.

FIG. 5 is an overall system explanatory diagram showing a second embodiment of the ice heat storage / heat pump type air conditioning system of the present invention.

FIG. 6 is an overall system explanatory diagram showing a second embodiment of the ice heat storage / heat pump type air conditioning system of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 first outdoor unit 2a, 2b compressor 3 second outdoor unit 4 gas engine 5 ice heat storage tank 6a first heat exchange refrigerant path 6b second heat exchange refrigerant path 7u, 7v refrigerant path 8u, 8v refrigerant path 9 Indoor unit (second indoor unit) 10u, 10v Refrigerant path 11 Bypass path 12 Switching valve mechanism 12a, 12b, 12c Open / close valve 20, 30 Four-way valve 21, 31 Outdoor heat exchanger 22, 32 Outdoor fan 41 First indoor 42u, 42v Refrigerant path 43a, 43b, 43c, 43d Open / close valve 44a, 44b, 44c, 44d, 44e, 44f Open / close valve 45 Bypass path

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F28D 20/02 F02G 5/04 J // F02G 5/04 F28D 20/00 C (72) Inventor: Kimi Nagae 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term (reference) in Sanyo Electric Co., Ltd. 3L045 AA04 BA09 BA10 CA02 DA02 DA05 FA02 GA01 HA01 JA02 JA14 KA15 PA05

Claims (9)

[Claims] 1. A first outdoor unit of an air-cooled heat pump package which is an air conditioning system which includes an ice heat storage tank, a compressor driven by an electric motor, and a gas engine which is an air conditioning system which includes a compressor driven by a gas engine. The second outdoor unit of the heat pump package is separately installed, and first and second heat exchange refrigerant paths are formed in the ice heat storage tank, and the refrigerant path of the first outdoor unit is connected to the first outdoor unit in the ice heat storage tank. And a refrigerant path of the second outdoor unit is connected in series to a second heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the indoor unit. Heat storage / heat pump type air conditioning system 2. A first outdoor unit of an air-cooled heat pump package that is an air conditioning system that includes an ice heat storage tank, a compressor driven by an electric motor, and a gas engine that is an air conditioning system that includes a compressor driven by a gas engine. The second outdoor unit of the heat pump package is separately installed, and the first and second outdoor units are placed in the ice storage tanks corresponding to the respective outdoor units.
A second heat exchange refrigerant path is configured, and a refrigerant path of the first outdoor unit is connected in parallel to a first heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the first indoor unit. And a switching valve mechanism for switching between them, and a refrigerant path of the second outdoor unit is connected in series to a second heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the second indoor unit. Ice storage / heat pump air conditioning system 3. A first outdoor unit of an air-cooled heat pump package that is an air conditioning system that includes an ice heat storage tank, a compressor driven by an electric motor, and a gas engine that is an air conditioning system that includes a compressor driven by a gas engine. The second outdoor unit of the heat pump package is separately installed, and the first and second outdoor units are placed in the ice storage tanks corresponding to the respective outdoor units.
A second heat exchange refrigerant path is configured, and a refrigerant path of the first outdoor unit is serially connected to a first heat exchange refrigerant path in the ice heat storage tank and a refrigerant path to the first indoor unit by a switching valve mechanism. And that the refrigerant path of the second outdoor unit is connected in series to the second heat exchange refrigerant path in the ice heat storage tank and the refrigerant path leading to the second indoor unit. Characteristic ice storage / heat pump air conditioning system 4. The ice heat storage / heat pump system according to claim 1, wherein a bypass path for bypassing the second heat exchange refrigerant path is formed, and a switching valve mechanism for switching between them is formed. Air conditioning system 5. The switching valve mechanism corresponding to the second heat exchange refrigerant path includes an on-off valve provided on the bypass path, and a valve between both ends of the bypass path and both ends of the second heat exchange refrigerant path. 5. An on-off valve provided, wherein the on-off valve is provided.
Ice storage and heat pump air conditioning system 6. The switching valve mechanism corresponding to the first heat exchange refrigerant path includes an on-off valve corresponding to each of both sides of the first heat exchange refrigerant path, and each of both sides of the refrigerant path of the first indoor unit. 3. An ice heat storage / heat pump type air conditioning system according to claim 2, comprising an on-off valve corresponding to the above. 7. The first outdoor unit is configured as a cooling only unit or a cooling / heating switching unit, and a switching valve mechanism corresponding to the first heat exchange refrigerant path corresponds to an outgoing side of the first heat exchange refrigerant path. The ice storage / heat pump type air conditioning system according to claim 2, comprising an on-off valve and an on-off valve corresponding to an outgoing side of a refrigerant path of the first indoor unit. 8. A first outdoor unit having a first outdoor unit at both ends of a refrigerant path.
The heat exchange refrigerant paths are connected to each other, and open / close valves are respectively provided. A bypass path of the first heat exchange refrigerant path is provided closer to the first outdoor unit than the open / close valve, and the open / close valve is provided in this bypass path. A configuration in which an on-off valve is provided on one side of a refrigerant path of the first outdoor unit, and a refrigerant path leading to the first indoor unit is connected to both ends of the on-off valve, and an on-off valve is provided in the refrigerant path. 4. The ice heat storage / heat pump type air conditioning system according to claim 3, wherein the switching valve mechanism is configured as a switch. 9. The heat exchange refrigerant path according to claim 1, wherein the first and second heat exchange refrigerant paths are constituted by a pair of pipes arranged in parallel.
Ice storage / heat pump type air conditioning system according to any one of items 1 to 8,