JP6234780B2 - Air conditioning system - Google Patents

Air conditioning system Download PDF

Info

Publication number
JP6234780B2
JP6234780B2 JP2013230415A JP2013230415A JP6234780B2 JP 6234780 B2 JP6234780 B2 JP 6234780B2 JP 2013230415 A JP2013230415 A JP 2013230415A JP 2013230415 A JP2013230415 A JP 2013230415A JP 6234780 B2 JP6234780 B2 JP 6234780B2
Authority
JP
Japan
Prior art keywords
heat
water
load
pump
storage tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2013230415A
Other languages
Japanese (ja)
Other versions
JP2015090246A (en
Inventor
鐵雄 呉
鐵雄 呉
井上　良則
良則 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sasakura Engineering Co Ltd
Original Assignee
Sasakura Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sasakura Engineering Co Ltd filed Critical Sasakura Engineering Co Ltd
Priority to JP2013230415A priority Critical patent/JP6234780B2/en
Publication of JP2015090246A publication Critical patent/JP2015090246A/en
Application granted granted Critical
Publication of JP6234780B2 publication Critical patent/JP6234780B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Other Air-Conditioning Systems (AREA)

Description

本発明は、空調システムに関し、更に詳しくは、ヒートポンプで冷却した冷水あるいは加熱した温水を貯溜して蓄熱する水蓄熱槽を備えた空調システムに関する。   The present invention relates to an air conditioning system, and more particularly to an air conditioning system including a water heat storage tank that stores cold water cooled by a heat pump or heated hot water to store heat.

電気料金が割安な夜間に冷凍機を稼働して冷熱を蓄熱槽に蓄熱し、この冷熱を昼間に消費する蓄熱槽を用いた空調システムがある（例えば、特許文献１参照）。   There is an air-conditioning system that uses a heat storage tank that operates a refrigerator at night when electricity charges are cheap, stores cold heat in a heat storage tank, and consumes this cold during the daytime (see, for example, Patent Document 1).

特開２００１−１０８３８５号公報JP 2001-108385 A

上記特許文献１では、昼間の放熱時には、蓄熱槽に蓄熱した冷熱を、空調負荷に入る冷媒に放熱しており、冷凍機には、空調負荷で温度が上昇した高温の冷媒が戻るように構成されており、冷凍機に戻る冷媒温度が高く、このため、冷凍機の効率が悪いという課題がある。   In the said patent document 1, at the time of heat dissipation in the daytime, the cold heat stored in the heat storage tank is dissipated to the refrigerant entering the air conditioning load, and the high temperature refrigerant whose temperature has increased due to the air conditioning load is returned to the refrigerator. Therefore, there is a problem that the refrigerant temperature returning to the refrigerator is high, and therefore the efficiency of the refrigerator is poor.

本発明は、上記のような点に鑑みてなされたものであって、蓄熱槽を備える空調システムにおけるヒートポンプの効率を高めることを目的としている。   This invention is made | formed in view of the above points, Comprising: It aims at improving the efficiency of the heat pump in an air conditioning system provided with a thermal storage tank.

上記目的を達成するために、本発明では次のように構成している。   In order to achieve the above object, the present invention is configured as follows.

（１）本発明に係る空調システムは、熱媒体を冷却するヒートポンプと、前記ヒートポンプからの前記熱媒体が供給される負荷と、前記熱媒体と水との熱交換を行う熱交換器と、前記熱交換器で熱交換される水を貯留する水蓄熱槽とを備え、
蓄熱時には、前記ヒートポンプで冷却された熱媒体によって、前記水蓄熱槽の水を前記熱交換器で冷却して前記水蓄熱槽に冷水として蓄熱し、
放熱時には、前記ヒートポンプで冷却された熱媒体を前記負荷に供給して冷房すると共に、前記水蓄熱槽の前記冷水によって、前記負荷で昇温した熱媒体を前記熱交換器で冷却して前記ヒートポンプに戻すものであり、
前記ヒートポンプを複数台備えると共に、前記複数台のヒートポンプが直列に接続され、
前記蓄熱時には、前記複数台のヒートポンプを全て稼働させ、前記放熱時には、前記複数台よりも少ない台数のヒートポンプを稼働させることを特徴とする。 (1) An air conditioning system according to the present invention includes a heat pump that cools a heat medium, a load that is supplied with the heat medium from the heat pump, a heat exchanger that performs heat exchange between the heat medium and water, A water heat storage tank for storing water to be heat-exchanged in the heat exchanger,
At the time of heat storage, the heat medium cooled by the heat pump cools the water in the water heat storage tank with the heat exchanger and stores heat as cold water in the water heat storage tank,
At the time of heat radiation, the heat medium cooled by the heat pump is supplied to the load for cooling, and the heat medium heated by the load is cooled by the heat exchanger by the cold water in the water heat storage tank. To return to
With a plurality of the heat pumps, the plurality of heat pumps are connected in series,
When the heat is stored, all of the plurality of heat pumps are operated, and when the heat is released, fewer heat pumps are operated than the plurality of heat pumps .

本発明によると、冷房運転の蓄熱時には、ヒートポンプで冷却された熱媒体によって、水蓄熱槽の水を冷却して冷水として蓄熱し、冷房運転の放熱時には、負荷で昇温した熱媒体を、熱交換器で、水蓄熱槽の冷水によって冷却してヒートポンプに戻すことが可能となり、ヒートポンプへの熱媒体の戻りの温度を低下させることができるので、ヒートポンプの効率を高めることができる。
放熱時には、上記のようにヒートポンプへの熱媒体の戻りの温度を、調整してヒートポンプの効率を高めることができるので、蓄熱時に比べて稼働させるヒートポンプの台数を減らすことによって、システム全体の効率を向上させることができる。 According to the present invention, at the time of heat storage during cooling operation, the water in the water heat storage tank is cooled and stored as cold water by the heat medium cooled by the heat pump. The exchanger can be cooled by the cold water in the water heat storage tank and returned to the heat pump, and the temperature of return of the heat medium to the heat pump can be lowered, so that the efficiency of the heat pump can be increased.
At the time of heat dissipation, the temperature of the return of the heat medium to the heat pump can be adjusted as described above to increase the efficiency of the heat pump. Can be improved.

（２）本発明の好ましい実施態様では、前記ヒートポンプは、前記熱媒体を冷却または加熱するものであり、蓄熱時には、前記ヒートポンプで加熱された熱媒体によって、前記水蓄熱槽の水を前記熱交換器で加熱して前記水蓄熱槽に温水として蓄熱し、放熱時には、前記ヒートポンプで加熱された熱媒体を前記負荷に供給して暖房すると共に、前記蓄熱槽の前記温水によって、前記負荷で降温した熱媒体を前記熱交換器で加熱して前記ヒートポンプに戻すようにしている。   (2) In a preferred embodiment of the present invention, the heat pump cools or heats the heat medium, and at the time of heat storage, the heat exchange of the water in the water heat storage tank is performed by the heat medium heated by the heat pump. The water storage tank is heated to store hot water as hot water, and when radiating heat, the heat medium heated by the heat pump is supplied to the load for heating, and the hot water in the heat storage tank is used to lower the temperature at the load. The heat medium is heated by the heat exchanger and returned to the heat pump.

この実施態様によると、暖房運転の蓄熱時には、ヒートポンプで加熱された熱媒体によって、水蓄熱槽の水を加熱して温水として蓄熱し、暖房運転の放熱時には、負荷で昇温した熱媒体を、熱交換器で、水蓄熱槽の温水によって加熱してヒートポンプに戻すことが可能となり、ヒートポンプへの熱媒体の戻りの温度を上昇させることができるので、ヒートポンプの効率を高めることができる。   According to this embodiment, at the time of heat storage in the heating operation, the heat medium heated by the heat pump is used to heat the water in the water heat storage tank and store it as warm water. The heat exchanger can be heated by the hot water in the water heat storage tank and returned to the heat pump, and the temperature of return of the heat medium to the heat pump can be increased, so that the efficiency of the heat pump can be increased.

（３）本発明の他の実施態様では、前記蓄熱時には、前記ヒートポンプからの前記熱媒体を前記負荷に供給して躯体蓄熱する。   (3) In another embodiment of the present invention, during the heat storage, the heat medium from the heat pump is supplied to the load to store the body heat.

この実施態様によると、蓄熱時には、ヒートポンプからの熱媒体を負荷に供給することによって、躯体蓄熱を行えると同時に、前記熱交換器を介して水蓄熱槽に水蓄熱を行うことができる。   According to this embodiment, at the time of heat storage, by supplying the heat medium from the heat pump to the load, the housing heat storage can be performed, and at the same time, water storage can be performed in the water heat storage tank via the heat exchanger.

（４）本発明の更に他の実施態様では、前記負荷が、放射空調用の負荷である。   (4) In still another embodiment of the present invention, the load is a load for radiant air conditioning.

この放射空調用の負荷としては、調湿機と放射パネルとを備えるのが好ましい。   As a load for this radiation air conditioning, it is preferable to provide a humidity controller and a radiation panel.

この実施態様によると、放熱時には、水蓄熱槽の蓄熱を利用して放射空調を行うことが可能となる。   According to this embodiment, at the time of heat dissipation, it becomes possible to perform radiation air conditioning using heat storage in the water heat storage tank.

このように、本発明によれば、冷房運転の放熱時には、水蓄熱槽に蓄熱した冷熱によって、ヒートポンプへの熱媒体の戻りの温度を低下させるので、ヒートポンプの効率を高めることができる。   Thus, according to the present invention, the temperature of the heat medium returned to the heat pump is lowered by the cold heat stored in the water heat storage tank during the heat radiation of the cooling operation, so that the efficiency of the heat pump can be increased.

本発明の一実施形態に係る空調システムの構成図である。It is a lineblock diagram of an air-conditioning system concerning one embodiment of the present invention. 図１の空調システムの冷房運転モードの蓄熱時の構成図である。It is a block diagram at the time of the thermal storage of the air_conditioning | cooling operation mode of the air conditioning system of FIG. 図１の空調システムの冷房運転モードの放熱時の構成図である。It is a block diagram at the time of heat dissipation of the air_conditioning | cooling operation mode of the air conditioning system of FIG. 図１の空調システムの暖房運転モードの蓄熱時の構成図である。It is a block diagram at the time of the thermal storage of the heating operation mode of the air conditioning system of FIG. 図１の空調システムの暖房運転モードの放熱時の構成図である。It is a block diagram at the time of heat dissipation of the heating operation mode of the air conditioning system of FIG.

以下、本発明の実施の形態について図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係る空調システムの構成図である。   FIG. 1 is a configuration diagram of an air conditioning system according to an embodiment of the present invention.

この実施形態の空調システムは、冷房運転と暖房運転を切換選択できるものであり、この空調システムは、熱媒体を冷却または加熱する熱源装置としての２台の第１，第２ヒートポンプと、第１ヒートポンプ１からの熱媒体が供給される空調用の負荷５と、前記熱媒体と水との熱交換を行う熱交換器４と、この熱交換器４で熱交換される水を貯留する水蓄熱槽３と、ヒートポンプ１，２側の熱媒体を循環させる第１循環ポンプ６と、蓄熱槽３側の水を循環させる第２循環ポンプ７とを備えている。   The air conditioning system of this embodiment is capable of switching between cooling operation and heating operation. This air conditioning system includes two first and second heat pumps as heat source devices for cooling or heating the heat medium, A load 5 for air conditioning to which a heat medium from the heat pump 1 is supplied, a heat exchanger 4 that performs heat exchange between the heat medium and water, and a water heat storage that stores water that is heat-exchanged by the heat exchanger 4 A tank 3, a first circulation pump 6 that circulates the heat medium on the heat pumps 1 and 2 side, and a second circulation pump 7 that circulates the water on the heat storage tank 3 side are provided.

第１，第２ヒートポンプ１，２は、直列に接続され、高温用の第２ヒートポンプ２によって冷却または加熱した熱媒体である水を、低温用の第１ヒートポンプ１によって、更に冷却または加熱する。   The first and second heat pumps 1 and 2 are connected in series and further cool or heat water, which is a heat medium cooled or heated by the second heat pump 2 for high temperature, by the first heat pump 1 for low temperature.

第１ヒートポンプ１で冷却または加熱された熱媒体である水が供給される空調用の負荷５は、放射空調用の負荷であって、調湿機及び放射パネルを含む。   The load 5 for air conditioning to which water that is a heat medium cooled or heated by the first heat pump 1 is supplied is a load for radiant air conditioning, and includes a humidity controller and a radiant panel.

第１ヒートポンプ１の出口(往き)と熱交換器４とを接続する管路Ｌ１には、第１循環ポンプ６と第１開閉弁８とが配設され、第１循環ポンプ６と第１開閉弁８との間の管路Ｌ１に負荷５の入口が接続される。   A first circulation pump 6 and a first on-off valve 8 are disposed in the pipe line L1 connecting the outlet (outward) of the first heat pump 1 and the heat exchanger 4, and the first circulation pump 6 and the first on-off valve An inlet of the load 5 is connected to the pipe line L1 between the valve 8 and the valve 8.

第２ヒートポンプの入口(戻り)と熱交換器４とを接続する管路Ｌ２には、第２開閉弁９と第３開閉弁１０とが配設され、第２開閉弁９と第３開閉弁１０との間の管路Ｌ２には、負荷５の出口が接続される。   A second on-off valve 9 and a third on-off valve 10 are disposed in the pipe line L2 connecting the inlet (return) of the second heat pump and the heat exchanger 4, and the second on-off valve 9 and the third on-off valve are provided. The outlet of the load 5 is connected to the pipe line L <b> 2 with 10.

負荷５と熱交換器４との間には、それらと並列に並列管路Ｌ３が接続され、この並列管路３には、第４開閉弁１１が配設される。第２ヒートポンプの入口(戻り)と熱交換器４とを接続する上記管路Ｌ２には、第２，第３開閉弁９，１０をバイパスするように、バイパス管路Ｌ４が接続される。   A parallel line L3 is connected between the load 5 and the heat exchanger 4 in parallel therewith, and a fourth on-off valve 11 is disposed in the parallel line 3. A bypass pipe L4 is connected to the pipe L2 connecting the inlet (return) of the second heat pump and the heat exchanger 4 so as to bypass the second and third on-off valves 9 and 10.

水蓄熱槽３は、高温側の水を貯留する高温槽３ａと低温側の水を貯留する低温槽３ｂとを備えている。水蓄熱槽３から熱交換器４への往き管路Ｌ５には、第２循環ポンプ７及び第１切換弁１２が配設され、熱交換器４から水蓄熱槽３への戻り管路Ｌ６には、第２切換弁１３が配設されている。第１切換弁１２は、高温槽３ａ側の管路Ｌ７または低温槽３ｂ側の管路Ｌ８を、往き管路Ｌ５に切換え接続し、第２切換弁１３は、高温槽３ａ側の管路Ｌ９または低温槽３ｂ側の管路Ｌ１０を、戻り管路Ｌ６に切換え接続する。   The water heat storage tank 3 includes a high-temperature tank 3a for storing high-temperature water and a low-temperature tank 3b for storing low-temperature water. A second circulation pump 7 and a first switching valve 12 are arranged in the outgoing line L5 from the water heat storage tank 3 to the heat exchanger 4, and the return line L6 from the heat exchanger 4 to the water heat storage tank 3 is connected to the return line L6. Is provided with a second switching valve 13. The first switching valve 12 switches the pipe L7 on the high temperature tank 3a side or the pipe L8 on the low temperature tank 3b side to the outgoing line L5, and the second switching valve 13 connects the pipe L9 on the high temperature tank 3a side. Alternatively, the pipe L10 on the low temperature tank 3b side is switched and connected to the return pipe L6.

各ヒートポンプ１，２、各循環ポンプ６，７、各開閉弁８〜１１及び各切換弁１２，１３は、図示しない制御装置によって制御される。   Each heat pump 1, 2, each circulation pump 6, 7, each on-off valve 8-11 and each switching valve 12, 13 is controlled by a control device (not shown).

この実施形態の空調シテスムは、電気料金が割安な夜間、例えば、午後１０時から午前８時までは第１,第２ヒートポンプ１，２を稼働して負荷５に熱媒体である水を供給して躯体蓄熱を行うと同時に、熱交換器４を介して水蓄熱槽３に蓄熱し、日中、例えば、午前８時から午後１０時までは放熱を行うものであり、蓄熱と放熱とを時間帯によって自動的に切換える。   The air conditioning system of this embodiment operates the first and second heat pumps 1 and 2 to supply water, which is a heat medium, to the load 5 at night when electricity charges are cheap, for example, from 10 pm to 8 am. The heat is stored in the water heat storage tank 3 through the heat exchanger 4 at the same time as the heat storage, and heat is released during the day, for example, from 8 am to 10 pm. Switch automatically according to the band.

以下、冷房運転モードと暖房運転モードとに分けて、蓄熱時と放熱時の動作についてそれぞれ説明する。   Hereinafter, the operation during heat storage and heat dissipation will be described separately for the cooling operation mode and the heating operation mode.

冷房運転モード
[蓄熱時]
図２は、冷房運転モードにおける蓄熱時の動作を説明するための図１に対応する構成図である。 Cooling operation mode
[When storing heat]
FIG. 2 is a configuration diagram corresponding to FIG. 1 for explaining the operation during heat storage in the cooling operation mode.

電力料金が割安な夜間の蓄熱時には、第１，第２ヒートポンプ１，２側の管路Ｌ１，Ｌ２では、第１〜第３開閉弁８〜１０を開放し、並列管路Ｌ３の第４開閉弁１１を閉止する。すなわち、第１，第２ヒートポンプ１，２に対して、負荷５及び熱交換器４をそれぞれ並列に接続する。   During heat storage at night when the electricity rate is cheap, the first and third on-off valves 8 to 10 are opened in the pipes L1 and L2 on the first and second heat pumps 1 and 2, and the fourth pipe on and off of the parallel pipe L3 is opened. The valve 11 is closed. That is, the load 5 and the heat exchanger 4 are respectively connected in parallel to the first and second heat pumps 1 and 2.

水蓄熱槽３の往き管路Ｌ５の第１切換弁１２は、高温槽３ａ側の管路Ｌ７を前記往き管路Ｌ５に接続し、戻り管路Ｌ６の第２切換弁１３は、低温槽３ｂ側の管路Ｌ１０を前記戻り管路Ｌ６に接続する。   The first switching valve 12 in the forward pipeline L5 of the water heat storage tank 3 connects the pipeline L7 on the high temperature tank 3a side to the forward pipeline L5, and the second switching valve 13 in the return pipeline L6 is connected to the low temperature tank 3b. The side pipe L10 is connected to the return pipe L6.

この状態で、第１，第２ヒートポンプ１，２及び第１，第２循環ポンプ６，７をそれぞれ稼働する。   In this state, the first and second heat pumps 1 and 2 and the first and second circulation pumps 6 and 7 are operated.

第２ヒートポンプ２で冷却され、更に第１ヒートポンプ１で冷却された、例えば、５℃の冷水は、第１循環ポンプ６によって空調用の負荷５に供給されて躯体、例えば、建造物の骨格材、内壁材、外壁材等を冷却して躯体蓄熱が行われる。また、第１ヒートポンプ１で冷却された５℃の冷水は、第１開閉弁８を介して熱交換器４にも供給される。熱交換器４には、水蓄熱槽３の高温槽３ａ側の、例えば、１４℃の水が、往き管路Ｌ５の第２循環ポンプ７によって第１切換弁１２を介して供給され、第１，２ヒートポンプ１，２によって冷却された５℃の冷水と熱交換して、例えば、７℃に冷却され、戻り管路Ｌ６及び第２切換弁１３を介して水蓄熱槽３の低温槽３ｂに戻されて冷水として蓄熱される。   Cooled water of, for example, 5 ° C. cooled by the second heat pump 2 and further cooled by the first heat pump 1 is supplied to the load 5 for air conditioning by the first circulation pump 6, and the housing, for example, the framework of the building The inner wall material, the outer wall material, and the like are cooled, and the housing heat storage is performed. The 5 ° C. cold water cooled by the first heat pump 1 is also supplied to the heat exchanger 4 via the first on-off valve 8. For example, 14 ° C. water on the high temperature tank 3a side of the water heat storage tank 3 is supplied to the heat exchanger 4 via the first switching valve 12 by the second circulation pump 7 of the forward pipe L5, and the first , 2 Heat exchange with 5 ° C. cold water cooled by the heat pumps 1 and 2, for example, cooled to 7 ° C., and returned to the low temperature tank 3 b of the water heat storage tank 3 through the return line L 6 and the second switching valve 13. It is returned and stored as cold water.

負荷５に供給されて躯体蓄熱を行って温度が上昇した、例えば、８℃の冷水は、第２開閉弁９を介して第２ヒートポンプ２へ流れる。熱交換器４で水蓄熱槽３からの水を冷却して温度が上昇した、例えば、１２℃の冷水は、第３，第２開閉弁１０，９を介して、あるいは、バイパス管路Ｌ４を介して、負荷５からの８℃の冷水と混合されて、例えば、１０℃の冷水として第２ヒートポンプ２に戻される。   For example, cold water of 8 ° C., which has been supplied with the load 5 and stored in the housing and has increased in temperature, flows to the second heat pump 2 via the second on-off valve 9. The water from the water heat storage tank 3 is cooled by the heat exchanger 4 and the temperature rises, for example, cold water of 12 ° C. is passed through the third and second on-off valves 10 and 9 or through the bypass line L4. Then, it is mixed with cold water of 8 ° C. from the load 5 and returned to the second heat pump 2 as cold water of 10 ° C., for example.

第２ヒートポンプ２に戻された１０℃の冷水は、再び、第２ヒートポンプ２及び第１ヒートポンプ１によって、例えば、５℃に冷却されて上記と同様に、負荷５及び熱交換器４に供給されて躯体蓄熱及び水蓄熱を同時に行う。   The 10 ° C. cold water returned to the second heat pump 2 is again cooled to, for example, 5 ° C. by the second heat pump 2 and the first heat pump 1 and supplied to the load 5 and the heat exchanger 4 in the same manner as described above. The body heat storage and water heat storage are performed simultaneously.

このように電気料金が割安な夜間には、第１，第２ヒートポンプ１，２を稼働させて負荷５に冷水を供給して躯体蓄熱を行うと同時に、熱交換器４を介して水蓄熱槽３に冷水として蓄熱する。   In such a nighttime when the electricity bill is cheap, the first and second heat pumps 1 and 2 are operated to supply cold water to the load 5 to store the housing heat, and at the same time, the water heat storage tank via the heat exchanger 4 3 is stored as cold water.

[放熱時]
図３は、冷房運転モードにおける放熱時の動作を説明するための図１に対応する構成図である。 [When dissipating heat]
FIG. 3 is a configuration diagram corresponding to FIG. 1 for explaining the operation during heat dissipation in the cooling operation mode.

日中の放熱時には、第１，第２ヒートポンプ１，２側の管路Ｌ１，Ｌ２では、第１〜第３開閉弁８〜１０を全て閉止し、並列管路Ｌ３の第４開閉弁１１を開放する。すなわち、ヒートポンプ１，２に対して、負荷５及び熱交換器４が、この順序で直列に接続される。
水蓄熱槽３の往き管路Ｌ５の第１切換弁１２は、低温槽３ｂ側の管路Ｌ８を前記往き管路Ｌ５に切換接続し、戻り管路Ｌ６の第２切換弁１３は、高温槽３ａ側の管路Ｌ９を前記戻り管路Ｌ６に接続する。 During heat dissipation during the day, all the first to third on-off valves 8 to 10 are closed in the pipe lines L1 and L2 on the first and second heat pumps 1 and 2 side, and the fourth on-off valve 11 in the parallel pipe L3 is turned on. Open. That is, the load 5 and the heat exchanger 4 are connected to the heat pumps 1 and 2 in series in this order.
The first switching valve 12 in the forward pipeline L5 of the water heat storage tank 3 switches and connects the pipeline L8 on the low temperature tank 3b side to the forward pipeline L5, and the second switching valve 13 in the return pipeline L6 is a high temperature tank. The pipe line L9 on the 3a side is connected to the return pipe line L6.

この状態で、第１ヒートポンプ１を稼働させず、第２ヒートポンプ２及び第１，第２循環ポンプ６，７をそれぞれ稼働する。   In this state, the first heat pump 1 is not operated, and the second heat pump 2 and the first and second circulation pumps 6 and 7 are operated.

第２ヒートポンプ２で冷却された、例えば、７℃の冷水は、稼働させていない第１ヒートポンプ１をバイパスして第１循環ポンプ６によって空調用の負荷５に供給されて冷房が行われる。負荷５で昇温した、例えば、１９℃の冷水は、第２開閉弁９と第３開閉弁１０との間の管路Ｌ２及び並列管路Ｌ３の第４開閉弁１１を介して熱交換器４に供給される。熱交換器４には、水蓄熱槽３の低温槽３ｂ側の、例えば、７℃の低温の冷水が、往き管路Ｌ５の第２循環ポンプ７によって第１切換弁１２を介して供給され、負荷５で昇温した１９℃の水を冷却し、昇温した、例えば、１４℃の水は、戻り管路Ｌ６及び第２切換弁１３を介して水蓄熱槽３の高温槽３ａに戻される。   The chilled water of, for example, 7 ° C. cooled by the second heat pump 2 bypasses the first heat pump 1 that is not in operation and is supplied to the load 5 for air conditioning by the first circulation pump 6 for cooling. The chilled water having a temperature of, for example, 19 ° C. heated by the load 5 is converted into a heat exchanger via the pipe L2 between the second on-off valve 9 and the third on-off valve 10 and the fourth on-off valve 11 of the parallel pipe L3. 4 is supplied. The heat exchanger 4 is supplied with low-temperature cold water of, for example, 7 ° C. on the low-temperature tank 3b side of the water heat storage tank 3 through the first switching valve 12 by the second circulation pump 7 in the forward line L5. The water of 19 ° C. that has been heated by the load 5 is cooled, and the water that has been heated, for example, 14 ° C. is returned to the high-temperature tank 3 a of the water heat storage tank 3 via the return line L 6 and the second switching valve 13. .

このように負荷５で冷房を行って昇温した１９℃の水は、熱交換器４で水蓄熱槽３からの７℃の低温の冷水によって、例えば、１２℃に冷却され、バイパス管路Ｌ４を介して第２ヒートポンプ２に戻されて、７℃に冷却されて上記と同様に、負荷５に供給されて冷房を行うと共に、熱交換器４で冷却される。   The 19 ° C. water thus heated by cooling with the load 5 is cooled to, for example, 12 ° C. by the low-temperature cold water of 7 ° C. from the water heat storage tank 3 in the heat exchanger 4, and the bypass pipe L4 Then, it is returned to the second heat pump 2, cooled to 7 ° C., supplied to the load 5 for cooling as described above, and cooled by the heat exchanger 4.

このように放熱時には、負荷５で昇温した、例えば、１９℃の冷水を、熱交換器４で水蓄熱槽３からの、例えば、７℃の低温の冷水によって、例えば、１２℃に冷却して第２ヒートポンプ２に戻すので、第２ヒートポンプ２へ戻る冷水の温度を低く抑えることが可能となり、ヒートポンプの効率を高めることができ、この実施形態では、第１ヒートポンプ１を稼働させることなく、第２ヒートポンプ２による単独運転を可能としている。   Thus, at the time of heat dissipation, for example, 19 ° C. chilled water heated by the load 5 is cooled to, for example, 12 ° C. by the heat exchanger 4 from the water heat storage tank 3 by, for example, 7 ° C. cold water. Therefore, the temperature of the cold water returning to the second heat pump 2 can be kept low, and the efficiency of the heat pump can be increased. In this embodiment, without operating the first heat pump 1, A single operation by the second heat pump 2 is enabled.

暖房運転モード
[蓄熱時]
図４は、暖房運転モードにおける蓄熱時の動作を説明するための図１に対応する構成図である。 Heating operation mode
[When storing heat]
FIG. 4 is a configuration diagram corresponding to FIG. 1 for explaining the operation during heat storage in the heating operation mode.

電力料金が割安な夜間の蓄熱時には、第１，第２ヒートポンプ１，２側の管路Ｌ１，Ｌ２では、第１〜第３開閉弁８〜１０を開放し、並列管路Ｌ３の第４開閉弁１１を閉止する。すなわち、第１，第２ヒートポンプ１，２に対して、負荷５及び熱交換器４をそれぞれ並列に接続する。   During heat storage at night when the electricity rate is cheap, the first and third on-off valves 8 to 10 are opened in the pipes L1 and L2 on the first and second heat pumps 1 and 2, and the fourth pipe on and off of the parallel pipe L3 is opened. The valve 11 is closed. That is, the load 5 and the heat exchanger 4 are respectively connected in parallel to the first and second heat pumps 1 and 2.

水蓄熱槽３の往き管路Ｌ５の第１切換弁１２は、低温槽３ｂ側の管路Ｌ８を前記往き管路Ｌ５に接続し、戻り管路Ｌ６の第２切換弁１３は、高温槽３ａ側の管路Ｌ９を前記戻り管路Ｌ６に接続する。   The first switching valve 12 in the forward pipeline L5 of the water heat storage tank 3 connects the pipeline L8 on the low temperature tank 3b side to the forward pipeline L5, and the second switching valve 13 in the return pipeline L6 is connected to the high temperature tank 3a. The side pipe L9 is connected to the return pipe L6.

この状態で、第１，第２ヒートポンプ１，２及び第１，第２循環ポンプ６，７をそれぞれ稼働する。   In this state, the first and second heat pumps 1 and 2 and the first and second circulation pumps 6 and 7 are operated.

第２ヒートポンプ２で加熱され、更に第１ヒートポンプ１で加熱された、例えば、４８℃の温水は、第１循環ポンプ６によって空調用の負荷５に供給されて躯体蓄熱が行われる。また、第１ヒートポンプ１で加熱された４８℃の温水は、第１開閉弁８を介して熱交換器４にも供給される。熱交換器４には、水蓄熱槽３の低温槽３ｂ側の、例えば、３５℃の水が、往き管路Ｌ５の第２循環ポンプ７によって第１切換弁１２を介して供給され、第１，２ヒートポンプ１，２によって加熱された４８℃の温水と熱交換して、例えば、４５℃に加熱され、戻り管路Ｌ６及び第２切換弁１３を介して水蓄熱槽３の高温槽３ａに戻されて温水として蓄熱される。   Hot water of, for example, 48 ° C. heated by the second heat pump 2 and further heated by the first heat pump 1 is supplied to the load 5 for air conditioning by the first circulation pump 6 and the housing heat storage is performed. The 48 ° C. hot water heated by the first heat pump 1 is also supplied to the heat exchanger 4 via the first on-off valve 8. For example, water at 35 ° C. on the low temperature tank 3b side of the water heat storage tank 3 is supplied to the heat exchanger 4 through the first switching valve 12 by the second circulation pump 7 of the forward pipe L5, and the first Heat exchange with 48 ° C. hot water heated by the heat pumps 1 and 2, for example, is heated to 45 ° C., and returned to the high temperature tank 3 a of the water heat storage tank 3 via the return line L 6 and the second switching valve 13. It is returned and stored as hot water.

負荷５に供給されて躯体蓄熱を行って温度が降下した、例えば、４３℃の温水は、第２開閉弁９を介して第２ヒートポンプ２へ流れる。熱交換器４で水蓄熱槽３からの水を加熱して温度が降下した、例えば、３５℃の温水は、第３，第２開閉弁１０，９を介して、あるいは、バイパス管路Ｌ４を介して、負荷５からの４３℃の温水と混合されて、例えば、３９℃の温水として第２ヒートポンプ２に戻される。   For example, hot water having a temperature of 43 ° C., which has been supplied to the load 5 and stored in the housing and has fallen, flows to the second heat pump 2 via the second on-off valve 9. The water from the water heat storage tank 3 is heated by the heat exchanger 4 and the temperature drops, for example, hot water of 35 ° C. passes through the third and second on-off valves 10 and 9 or the bypass pipe L4. Then, it is mixed with 43 ° C. warm water from the load 5 and returned to the second heat pump 2 as, for example, 39 ° C. warm water.

第２ヒートポンプ２に戻された３９℃の温水は、再び、第２ヒートポンプ２及び第１ヒートポンプ１によって、例えば、４８℃に加熱されて上記と同様に、負荷５及び熱交換器４に供給されて躯体蓄熱及び水蓄熱を同時に行う。   The 39 ° C. warm water returned to the second heat pump 2 is again heated to, for example, 48 ° C. by the second heat pump 2 and the first heat pump 1 and supplied to the load 5 and the heat exchanger 4 in the same manner as described above. The body heat storage and water heat storage are performed simultaneously.

このように電気料金が割安な夜間には、第１，第２ヒートポンプ１，２を稼働させて負荷５に温水を供給して躯体蓄熱を行うと同時に、熱交換器４を介して水蓄熱槽３に温水として蓄熱する。   In such a nighttime when the electricity bill is cheap, the first and second heat pumps 1 and 2 are operated to supply hot water to the load 5 to store the housing heat, and at the same time, the water heat storage tank via the heat exchanger 4 3 is stored as warm water.

[放熱時]
図５は、暖房運転モードにおける放熱時の動作を説明するための図１に対応する構成図である。 [When dissipating heat]
FIG. 5 is a configuration diagram corresponding to FIG. 1 for explaining the operation during heat radiation in the heating operation mode.

日中の放熱時には、第１，第２ヒートポンプ１，２側の管路Ｌ１，Ｌ２では、第１〜第３開閉弁８〜１０を全て閉止し、並列管路Ｌ３の第４開閉弁１１を開放する。すなわち、ヒートポンプ１，２に対して、負荷５及び熱交換器４が、この順序で直列に接続される。
水蓄熱槽３の往き管路Ｌ５の第１切換弁１２は、高温槽３ａ側の管路Ｌ７を前記往き管路Ｌ５に切換接続し、戻り管路Ｌ６の第２切換弁１３は、低温槽３ｂ側の管路Ｌ１０を前記戻り管路Ｌ６に接続する。 During heat dissipation during the day, all the first to third on-off valves 8 to 10 are closed in the pipe lines L1 and L2 on the first and second heat pumps 1 and 2 side, and the fourth on-off valve 11 in the parallel pipe L3 is turned on. Open. That is, the load 5 and the heat exchanger 4 are connected to the heat pumps 1 and 2 in series in this order.
The first switching valve 12 in the forward pipeline L5 of the water heat storage tank 3 switches the pipeline L7 on the high temperature tank 3a side to the forward pipeline L5, and the second switching valve 13 in the return pipeline L6 is a low temperature tank. The pipe line L10 on the 3b side is connected to the return pipe line L6.

この状態で、第１ヒートポンプ１を稼働させず、第２ヒートポンプ２及び第１，第２循環ポンプ６，７をそれぞれ稼働する。   In this state, the first heat pump 1 is not operated, and the second heat pump 2 and the first and second circulation pumps 6 and 7 are operated.

第２ヒートポンプ２で加熱された、例えば、４５℃の温水は、稼働させていない第１ヒートポンプ１をバイパスして第１循環ポンプ６によって空調用の負荷５に供給されて暖房が行われる。負荷５で降温した、例えば、３０℃の温水は、第２開閉弁９と第３開閉弁１０との間の管路Ｌ２及び並列管路Ｌ３の第４開閉弁１１を介して熱交換器４に供給される。熱交換器４には、水蓄熱槽３の高温槽３ａ側の、例えば、４５℃の高温の温水が、往き管路Ｌ５の第２循環ポンプ７によって第１切換弁１２を介して供給され、負荷５で降温した３０℃の温水を加熱し、降温した、例えば、３５℃の温水は、戻り管路Ｌ６及び第２切換弁１３を介して水蓄熱槽３の低温槽３ｂに戻される。   Hot water heated at the second heat pump 2, for example, 45 ° C. bypasses the first heat pump 1 that is not in operation and is supplied to the load 5 for air conditioning by the first circulation pump 6 for heating. For example, 30 ° C. hot water having been cooled by the load 5 is supplied to the heat exchanger 4 via the pipe L2 between the second on-off valve 9 and the third on-off valve 10 and the fourth on-off valve 11 of the parallel pipe L3. To be supplied. To the heat exchanger 4, for example, high temperature hot water of 45 ° C. on the high temperature tank 3 a side of the water heat storage tank 3 is supplied via the first switching valve 12 by the second circulation pump 7 in the forward line L 5, The hot water having a temperature of 30 ° C. that has been cooled by the load 5 is heated and the temperature is lowered, for example, the hot water of 35 ° C. is returned to the low temperature tank 3b of the water heat storage tank 3 through the return line L6 and the second switching valve 13.

このように負荷５で暖房を行って降温した３０℃の温水は、熱交換器４で水蓄熱槽３からの４５℃の温水によって、例えば、４０℃に加熱され、バイパス管路Ｌ４を介して第２ヒートポンプ２に戻されて、４５℃に加熱されて上記と同様に、負荷５に供給されて暖房を行うと共に、熱交換器４で加熱される。   The 30 ° C. warm water that has been heated by the load 5 and lowered in this way is heated to, for example, 40 ° C. by the heat exchanger 4 by the 45 ° C. warm water from the water heat storage tank 3, via the bypass line L4. Returned to the second heat pump 2, heated to 45 ° C., supplied to the load 5 for heating as described above, and heated by the heat exchanger 4.

このように放熱時には、負荷５で降温した、例えば、３０℃の温水を、熱交換器４で水蓄熱槽３からの、例えば、４５℃の高温の温水によって、例えば、４０℃に加熱して第２ヒートポンプ２に戻すので、第２ヒートポンプ２へ戻る温水の温度を高くすることが可能となり、ヒートポンプの効率を高めることができ、この実施形態では、第１ヒートポンプ１を稼働させることなく、第２ヒートポンプ２による単独運転を可能としている。   Thus, at the time of heat dissipation, for example, hot water of 30 ° C. cooled by the load 5 is heated to, for example, 40 ° C. by high-temperature hot water of 45 ° C. from the water heat storage tank 3 by the heat exchanger 4. Since it returns to the 2nd heat pump 2, it becomes possible to raise the temperature of the warm water which returns to the 2nd heat pump 2, and can raise the efficiency of a heat pump. In this embodiment, without operating the 1st heat pump 1, the 1st 2 The single operation by the heat pump 2 is enabled.

１ 第１ヒートポンプ
２ 第２ヒートポンプ
３ 水蓄熱槽
４ 熱交換器
５ 負荷
６ 第１循環ポンプ
７ 第２循環ポンプ
８〜１１ 第１〜第４開閉弁
１２，１３ 第１，第２切換弁 DESCRIPTION OF SYMBOLS 1 1st heat pump 2 2nd heat pump 3 Water thermal storage tank 4 Heat exchanger 5 Load 6 1st circulation pump 7 2nd circulation pump 8-11 1st-4th on-off valve 12,13 1st, 2nd switching valve

Claims (4)

熱媒体を冷却するヒートポンプと、前記ヒートポンプからの前記熱媒体が供給される負荷と、前記熱媒体と水との熱交換を行う熱交換器と、前記熱交換器で熱交換される水を貯留する水蓄熱槽とを備え、
蓄熱時には、前記ヒートポンプで冷却された熱媒体によって、前記水蓄熱槽の水を前記熱交換器で冷却して前記水蓄熱槽に冷水として蓄熱し、
放熱時には、前記ヒートポンプで冷却された熱媒体を前記負荷に供給して冷房すると共に、前記水蓄熱槽の前記冷水によって、前記負荷で昇温した熱媒体を前記熱交換器で冷却して前記ヒートポンプに戻すものであり、
前記ヒートポンプを複数台備えると共に、前記複数台のヒートポンプが直列に接続され、
前記蓄熱時には、前記複数台のヒートポンプを全て稼働させ、前記放熱時には、前記複数台よりも少ない台数のヒートポンプを稼働させる、
ことを特徴とする空調システム。 A heat pump that cools the heat medium, a load to which the heat medium from the heat pump is supplied, a heat exchanger that performs heat exchange between the heat medium and water, and water that is heat-exchanged by the heat exchanger are stored. A water heat storage tank
At the time of heat storage, the heat medium cooled by the heat pump cools the water in the water heat storage tank with the heat exchanger and stores heat as cold water in the water heat storage tank,
At the time of heat radiation, the heat medium cooled by the heat pump is supplied to the load for cooling, and the heat medium heated by the load is cooled by the heat exchanger by the cold water in the water heat storage tank. To return to
With a plurality of the heat pumps, the plurality of heat pumps are connected in series,
At the time of the heat storage, operate all of the plurality of heat pumps, and at the time of heat dissipation, operate a number of heat pumps less than the plurality of units,
An air conditioning system characterized by that. 前記ヒートポンプは、前記熱媒体を冷却または加熱するものであり、
蓄熱時には、前記ヒートポンプで加熱された熱媒体によって、前記水蓄熱槽の水を前記熱交換器で加熱して前記水蓄熱槽に温水として蓄熱し、
放熱時には、前記ヒートポンプで加熱された熱媒体を前記負荷に供給して暖房すると共に、前記蓄熱槽の前記温水によって、前記負荷で降温した熱媒体を前記熱交換器で加熱して前記ヒートポンプに戻す、
請求項１に記載の空調システム。 The heat pump cools or heats the heat medium,
At the time of heat storage, the heat medium heated by the heat pump heats the water in the water heat storage tank with the heat exchanger to store heat as warm water in the water heat storage tank,
At the time of heat dissipation, the heating medium heated by the heat pump is supplied to the load for heating, and the heating medium cooled by the load is heated by the heat exchanger and returned to the heat pump by the hot water in the heat storage tank. ,
The air conditioning system according to claim 1. 前記蓄熱時には、前記ヒートポンプからの前記熱媒体を前記負荷に供給して躯体蓄熱する、
請求項１または２に記載の空調システム。 At the time of the heat storage, the heat medium from the heat pump is supplied to the load to store the body heat.
The air conditioning system according to claim 1 or 2. 前記負荷が、放射空調用の負荷である、
請求項１ないし３のいずれかに記載の空調システム。 The load is a load for radiant air conditioning,
The air conditioning system according to any one of claims 1 to 3.
JP2013230415A 2013-11-06 2013-11-06 Air conditioning system Active JP6234780B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013230415A JP6234780B2 (en) 2013-11-06 2013-11-06 Air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013230415A JP6234780B2 (en) 2013-11-06 2013-11-06 Air conditioning system

Publications (2)

Publication Number Publication Date
JP2015090246A JP2015090246A (en) 2015-05-11
JP6234780B2 true JP6234780B2 (en) 2017-11-22

Family

ID=53193864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013230415A Active JP6234780B2 (en) 2013-11-06 2013-11-06 Air conditioning system

Country Status (1)

Country Link
JP (1) JP6234780B2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3309282B2 (en) * 1992-06-09 2002-07-29 清水建設株式会社 Design method of air conditioning system with heat storage tank
JP3689283B2 (en) * 1999-10-04 2005-08-31 株式会社ヤマト Heat storage device
JP4518294B2 (en) * 2000-04-25 2010-08-04 パナソニックエコシステムズ株式会社 Air conditioning, heat storage, and hot water supply system using body heat storage
JP4318277B2 (en) * 2001-07-10 2009-08-19 有限会社アイ・エス・エンジニアズ Heat storage device for air conditioning

Also Published As

Publication number Publication date
JP2015090246A (en) 2015-05-11

Similar Documents

Publication Publication Date Title
JP6857883B2 (en) Geothermal utilization system and geothermal utilization method
CN106032919B (en) A kind of freezing water cooling system
KR100835122B1 (en) Compound heat pump cycle that cold.heating efficiency improveses
EP1815188B1 (en) Hot water supply and air conditioning system using co2 heat pump
CN103574988A (en) Cold and hot multi-functional economizer system
JP2015161465A (en) CO2 water heater
JP2004003801A (en) Refrigeration equipment using carbon dioxide as refrigerant
JP2015218944A (en) Refrigeration system
KR101001293B1 (en) Energy-saving ice thermal storage system for separating cold charge and discharge pump
KR101548073B1 (en) Heating-apparatus and Water-heater storing heat capable of using the hot heat of heat-source separated from heat storing tank directly
JP5751599B2 (en) Hot water heating / cooling system
JP2010286144A (en) Heat storage type hot water supply air-conditioning system
TWI444579B (en) Heat recovered cooling system
JP6234780B2 (en) Air conditioning system
KR101430590B1 (en) Cooling system for watertank
JP6506918B2 (en) Ice storage system
KR101339297B1 (en) Multifunctional heat pump system using the geothermal heat
JPH03294754A (en) Air conditioner
JP6116093B2 (en) Heat source system
JP2004251557A (en) Refrigeration device using carbon dioxide as refrigerant
CN207842707U (en) A kind of power battery cooling heating management system and power battery
JP2004156805A (en) Heat pump system
JPH02225924A (en) Heat storage type air conditioning system used for floor heating as well
JP2006145098A (en) Heat storage type air conditioner
JP2006162207A (en) Ground heat utilizing water cooled heat pump air conditioning system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160801

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170510

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170523

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170719

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170926

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20171025

R150 Certificate of patent or registration of utility model

Ref document number: 6234780

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250