JP2005114196A - Heating medium supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems of a conventional hot water supply system using two different kinds of heat sources: when heating the whole heating medium of a hot water storage tank by a heat pump in the night, solar heat collection efficiency in the tomorrow daytime that is the next time is reduced, and a very large hot water storage tank is required so as to maintain heat collection efficiency equivalent to the case of only solar heat collection. <P>SOLUTION: This heating medium supply system using the different kinds of heat sources has a plurality of first heating medium storage parts. A second heating medium storage part 4 capable of supplying the heating medium heated by the heat pump 2 or the like that is the heat source allowing arbitrary heating into the respective heating medium storage parts 1a, 1b, and having heat exchange parts 50 of a solar heat collector 5 or the like that is the heat source not allowing the arbitrary heating is provided such that the heating medium continues to all the first heating medium storage parts 1a, 1b, and the alternately or sequentially heated heating medium is supplied into the plurality of first heating medium storage parts 1a, 1b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  Utilizing a heat medium supply system having a plurality of different types of heat sources, in particular, a heat source that can be arbitrarily heated such as a heat pump, and a heat source that cannot be arbitrarily heated using a natural heat source such as a solar heat collector, The present invention relates to a hot water supply system that uses water as a heat medium.

  As a conventional technology of a hot water supply system using a solar heat collector and a heat pump as a combined heat source, the technology disclosed in Japanese Patent Laid-Open Nos. Hei 3-21359 (prior art 1) and Japanese Patent Laid-Open No. 2002-162109 (prior art 3). ) Is known.

  Prior art 1 is a hot water supply system that combines a heat pump and a solar collector, and describes a hot water supply system using a heat pump that guides hot water to a hot water storage tank, heats it with this heat pump, and returns it to the upper side of the hot water storage tank. ing.

  In addition, a radiator consisting of heat transfer tubes is provided on the lower side of the hot water storage tank, a heat medium is circulated between the radiator and the solar heat collector, and the solar heat collected by the heat collector is collected in the hot water storage tank by the heat radiator. A solar hot water supply system (prior art 2) that is heated by giving it to water is also known.

  Further, in the prior art 3, “a solar radiator that is provided with a radiator on the lower side of a hot water storage tank of the hot water supply system, circulates a heat medium between the radiator and the solar collector, and collects heat with the collector. The heat is supplied to the water in the hot water storage tank by the radiator, and the water in the hot water storage tank is guided to the heat pump by the flow passage, heated, and then returned to the upper portion of the hot water storage tank. The side is arranged above the radiator on the lower side of the hot water storage tank. "

According to the above-described configuration, the prior art 3 “has only the water above the radiator of the hot water storage tank heated by the heat pump to form hot water, and the water around the radiator can be maintained at a low temperature. The heat can be radiated well from the radiator to the water during operation, and the heat medium entering the heat collector can be lowered to increase the solar heat collection efficiency.
Japanese Patent Laid-Open No. 3-21359 JP 2002-162109 A

  A system that heats a heat medium such as water using a combination of two different types of heat sources and supplies the heat medium such as hot water appropriately heated to the outside is known as described above. In the prior art 1 and the prior art 2, it is possible to secure a sufficient amount of hot water and save energy by operating a solar collector in the daytime, but if the heat medium in the hot water storage tank is warmed up with a heat pump at night, There was a problem that the solar heat collection efficiency in the daytime of the next day, which will be the next time, would decrease.

  Further, in the conventional technique 3, the solar heat collection efficiency can be maintained higher than in the conventional techniques 1 and 2, but there is a problem that it is difficult to maintain the same heat collection efficiency as in the case of only the solar heat collection. It was. In order to maintain the same heat collection efficiency as in the case of only solar heat collection by the prior art 3, there is a problem that requires a very large hot water storage tank.

  In order to solve the above-mentioned problems, the present invention has a plurality of first heat storage medium sections in a heat medium supply system using different types of heat sources, and can be arbitrarily heated into each first heat storage medium section. The second heat storage medium part having the heat exchange part of the heat source that cannot be arbitrarily heated is configured so that the heat medium continues to all the first heat storage medium parts. And a heating medium supply system is provided, wherein the heating medium is supplied to the plurality of first heat storage medium portions alternately or sequentially.

  In addition, in a heat medium supply system using different types of heat sources, a first heat storage medium unit capable of supplying a heat medium heated by a heat source that can be arbitrarily heated into a plurality of heat storage medium tanks, and arbitrary heating Heat that is provided in such a way that the heat medium is continuous with the second heat storage medium part provided with the heat exchange part of the impossible heat source, and is alternately or sequentially heated in the plurality of first heat storage medium parts A heating medium supply system is proposed, in which the medium is supplied and the second heat storage medium part is heated by the heat exchanging part to the first heat storage medium part not supplied with the heated heat medium.

  Furthermore, in the heat medium supply system using different types of heat sources, a plurality of first heat storage medium sections are provided in one heat storage medium tank and can be arbitrarily heated into each first heat storage medium section. A heat medium heated by a simple heat source can be supplied, and a second heat storage medium part having a heat exchange part of a heat source that cannot be arbitrarily heated is provided so as to continue below each first heat storage medium part. Provided is a heating medium supply system that supplies a heating medium that is provided and heated alternately or sequentially into a plurality of first heat storage medium sections.

  Furthermore, in a heat medium supply system using different types of heat sources, the heat medium has a plurality of first heat storage medium sections and is heated by a heat source that can be arbitrarily heated into each of the first heat storage medium sections. Each of the second heat storage medium parts including a heat exchange part of a heat source that cannot be arbitrarily heated is provided so that the heat medium continues to all the first heat storage medium parts, and a plurality of first heat storage parts are provided. Supplying the heat medium heated alternately or sequentially into the heat storage medium section, and providing a mixing valve control device at the junction of each heat supply medium branch pipe communicating from each first heat storage medium section A heating medium supply system is proposed.

  A heat medium supply system is proposed in which the arbitrarily heatable heat source described in columns 0009 to 0012 is a heat source composed of a heat pump, and the heat source that is not arbitrarily heatable is a heat source composed of a solar heat collector.

  Compared to the prior art, the thermal efficiency of each of the two different types of heat sources can be used very efficiently. For example, when a solar collector and heat pump are two different heat sources, the heat collection efficiency of the solar collector and the energy efficiency coefficient of performance of the heat pump (COP = Coefficient of Performance = heating capacity (output) / heat pump power consumption (input)) ) Can be used with almost no decrease in efficiency compared to the case where each is used alone.

  Furthermore, by providing a plurality of small heat storage media without using a large-scale heat storage medium tank, it is possible to improve solar heat collection efficiency compared to the case of using a heat source that cannot be arbitrarily heated, such as a single solar collector. There is an effect that can be used with almost no decrease. In addition, by providing a plurality of small heat storage medium portions, it is possible to stably supply hot water without causing supply of the supplied heat medium to be interrupted.

  Furthermore, in the invention according to claim 4, the mixing valve control device can selectively use a large amount of a heat medium having a temperature close to a predetermined heat supply medium temperature from each first heat storage medium part. As a result, it is possible to improve the thermal efficiency (heat collection efficiency) of a heat source that cannot be heated in any time zone such as a solar heat collector.

  The present invention will be described based on FIG. 1 showing a circuit configuration diagram of the first embodiment, FIG. 2 showing a circuit configuration diagram of the second embodiment, and FIG. 3 showing a control flow of an embodiment of the present invention.

  This invention uses a heat source that can be heated arbitrarily such as a heat pump as one of the different types of heat sources, and a heat source that cannot be heated at any time zone using mainly natural power, such as a solar heat collector. doing. The heat medium that can be supplied to the outside is generally water, but oil or the like can also be used.

  The heat medium supply system of the present invention has a plurality of first heat storage medium sections 1 and is heated by a heat pump 2 which is a heat source that can be heated into each first heat storage medium section 1 at an arbitrary time zone. The heating medium circulation path 3 that can supply each heating medium is provided. The heat medium circulation path 3 is provided so that a heated heat medium can be supplied from the heat pump 2 to the upper part of each first heat storage medium part 1, and the heat medium having a relatively low temperature from the lower part of each first heat storage medium part 1. Can be circulated to the heat pump 2. In this embodiment, water is used as the heat medium. The 2nd heat storage medium part 4 is equipped with the heat exchange part 50 of the solar-heat collector 5 which is a heat source which cannot be heated in arbitrary time zones inside. The second heat storage medium part 4 is provided so that the heat medium continues to all the first heat storage medium parts 1. It is possible to supply a heat medium that is stored in the plurality of first heat storage medium portions 1 by the heat pump 2 and stored alternately or sequentially.

  Next, a first embodiment of the present invention will be described with reference to FIG. The first embodiment of the present invention is a hot water supply system in which the arbitrarily heatable heat source is the heat pump 2, the unheatable heat source is the solar heat collector 5, and the heat medium uses water. In the first embodiment of the present invention, a plurality of heat storage medium tanks 10a, in this example, two heat storage medium tanks 10a and 10a, are each heated by a heat pump 2 that is a heat source that can be heated at an arbitrary time zone. Second heat storage medium comprising first heat storage medium portions 1a and 1b that can supply the heat medium and heat exchange portions 50a and 50b of solar heat collector 5 that is a heat source that cannot be heated in an arbitrary time zone The parts 4a and 4b are provided so that the heat medium is continuous with each other. In this embodiment, each one of the heat storage medium tanks 10a is a cylindrical and vertically long liquid tank, and a first heat storage medium part 1a (1b) capable of supplying a heat medium heated by the heat pump 2 to the upper part thereof. And the lower part is made into the 2nd heat storage medium part 4a (4b) provided with the heat exchange part 50 of the solar-heat collector 5. FIG.

  It is provided so that a heat medium made of water can be supplied from one heat pump 2 to each first heat storage medium part 1a, 1b through the first heat medium circulation path 3a. The first heat medium circulation path 3a is provided with inlets 30 and 30 that can supply the heat medium heated from the top plate of each of the first heat storage medium portions 1a and 1b from the heat pump 2, respectively. Outlets 31 and 31 are provided on the bottom surfaces of the heat medium parts 4a and 4b, and a second heat medium circulation path 3b for circulating the heat medium from the second heat storage medium parts 4a and 4b to the heat pump 2 is provided. . Reference numeral 20 denotes a heat pump stop sensor, which is provided so as to be in contact with at least the heat medium of each first heat storage medium section 1 and is connected to the heat pump 2 by a cord.

  One solar heat collector 5 is provided with a heat collector circulation path 51 between two heat exchange parts 50a and 50b, and the heat collector circulation path 51 is provided in two three-way directions respectively provided in the forward path and the return path. The valves 52, 52 are selectively branched to the two heat exchange units 50, 50, and the heat medium is circulated alternately to any one of the heat exchangers 50. This heat medium is also usually water. Reference numeral 53 denotes a circulation pump, which is provided on the solar heat collector 5 side from the three-way valves 52 and 52 in the middle of either the forward path or the return path of the heat collector circulation path 51.

  A heating medium supply port 70 of a supply branch branched from a heating medium supply source to a bottom surface of each heat storage medium tank 10a, 10a, that is, a bottom surface of each second heat storage medium part 4a, 4b, via a supply pipe 7a; 70 is opened. In this embodiment, the heat medium supply source is water. Further, on the upper surfaces of the heat storage medium tanks 10a and 10a, i.e., the upper surfaces of the first heat storage medium portions 1 and 1, respectively, the heat medium exhaust as upstream ends of the heat supply medium branch tubes 72 and 72 communicating with the heat supply medium tube 7b. The outlets 71 and 71 are opened. In this embodiment, the heat supply medium pipe 7b is a hot water supply pipe, and the downstream end of the hot water supply pipe is a hot water supply port.

  The mixing valve control device 6 is provided at a joining point where the plurality of heat supply medium branch pipes 72 and 72 join. The mixing valve control device 6 mixes the heat medium supplied from the first heat storage medium portions 1a and 1b to the heat supply medium pipe 7b so that the heat medium becomes close to a predetermined heat supply medium temperature. Then, it is supplied to the heat supply medium pipe 7b.

  The heat medium collected by the solar heat collector 5 passes through the heat collector circulation path 51 and is alternately heated by the two heat exchange parts 5a and 5b in the relatively low temperature second heat storage medium parts 4a and 4b. The medium (water) is heated. The heat medium of the first heat storage medium parts 1a and 1b is relatively high because it is located above the second heat storage medium parts 4a and 4b, but from a predetermined heat supply medium temperature (hot water supply temperature). When the temperature is low, the heat medium (hot water) stored by the heat pump 2 is supplied from the first heat medium circulation path 3a to the first heat storage units 1a and 1b and heated. When the heat medium of the first heat storage medium parts 1a and 1b becomes higher than a predetermined heat supply medium temperature (hot water supply temperature), a control signal from the heat pump stop sensor 20 causes the first heat storage medium part 1a, Supply to 1b is stopped.

  Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment of the present invention is a hot water supply system in which the heat source that can be arbitrarily heated is the heat pump 2, the heat source that cannot be arbitrarily heated is the solar heat collector 5, and the heat medium uses water. In the second embodiment of the present invention, a plurality of heat mediums that can be supplied by a heat pump 2 that is a heat source that can be heated in an arbitrary time zone are provided in one heat storage medium tank 10b. Two first heat storage medium parts 1a and 1b and one second heat storage medium part 4 provided with a heat exchanging part 50 of a solar heat collector 5 which is a heat source that cannot be heated in an arbitrary time zone are mutually connected. The heating medium is provided so as to be continuous. In this embodiment, the heat storage medium tank 10b is formed of a cylindrical liquid tank, the upper half of which is divided by the heat insulating plate 8, and the two first heat storage medium parts 1a and 1b each having substantially the same capacity are provided. In the lower half of the heat storage medium tank 10b, one second heat storage medium part 4 without the heat insulating plate 8 is formed. Therefore, the second heat storage medium part 4 is continuous with the lower surfaces of the two first heat storage medium parts 1a and 1b on the upper surface, and the heat medium can be moved.

  Between one heat pump 2 and each 1st heat storage medium part 1a, 1b, it has provided in the heat-medium circulation path 3 so that the heat medium which consists of water can be circulated. The heat medium circulation path 3 is provided with inlets 30 and 30 that can supply a heat medium heated from the top plate of each of the first heat storage medium parts 1a and 1b from the heat pump 2, respectively. One outlet 31 for circulation to the heat pump 2 is provided on the bottom surface of 4. Reference numerals 20 and 20 denote heat pump stop sensors, each of which is provided so that the sensor part contacts the heat medium in each of the first heat storage medium parts 1a and 1b, and is connected to the heat pump 2 by a cord.

  One solar heat collector 5 is provided with a heat collector circulation path 51 in which a heat medium is circulated by a circulation pump 53 with respect to one heat exchange unit 50. This heat medium is also usually water.

  A heat medium supply port 70 of the supply pipe 7 a is opened from the heat medium supply source to the bottom surface of the heat storage medium tank 10 b, that is, the bottom surface of the second heat storage medium unit 4. In this embodiment, the heat medium supply source is water. Moreover, the heat-medium discharge ports 71 and 71 are opened on the upper surface of each 1st heat storage medium part 1a and 1b as an upstream end of each heat-supply-medium branch pipe 72 and 72 connected to the heat-supply-medium medium pipe | tube 7b. In this embodiment, the heat supply medium pipe 7b is a hot water supply pipe, and the downstream end of the hot water supply pipe is a hot water supply port.

  The mixing valve control device 6 is provided at a joining point where the plurality of heat supply medium branch pipes 72 and 72 join. The mixing valve control device 6 mixes the heat medium supplied from the first heat storage medium portions 1a and 1b to the heat supply medium pipe 7b so that the heat medium becomes close to a predetermined heat supply medium temperature. Then, it is supplied to the heat supply medium pipe 7b.

  The heat medium collected by the solar heat collector 5 passes through the heat collector circulation path 51 and is alternately heated by two heat exchanging parts 50 in the relatively low temperature second heat storage medium part 4 (water). To heat. The heat medium of the first heat storage medium parts 1a and 1b is relatively high because it is located above the second heat storage medium part 4, but is lower than a predetermined heat supply medium temperature (hot water supply temperature) Supplies the heat medium (hot water) stored by the heat pump 2 from the first heat medium circulation path 3a to the first heat storage units 1a and 1b and heats it. When the heat medium of the first heat storage medium parts 1a and 1b becomes higher than a predetermined heat supply medium temperature (hot water supply temperature), a control signal from the heat pump stop sensor 20 causes the first heat storage medium part 1a, Supply to 1b is stopped.

  Next, the operation of the first embodiment and the second embodiment of the present invention will be described with reference to FIG. FIG. 3 shows that the heat media of the plurality of first heat storage medium portions 1 are used alternately or in order. In this embodiment, the heat media of the two first heat storage medium portions 1a and 1b are alternately used. It is a table | surface which shows the case where it utilizes for.

  On the first day, the heat medium (hot water) of the first heat storage medium portion 1b stored by the heat pump 2 at midnight the previous day was mainly used (main use), and was collected by the daytime solar heat collector 5 of the day. The first heat storage medium section 1a is used as a secondary when the usage amount is insufficient (sub-use).

  On the second day, the heat medium (hot water) of the first heat storage medium part 1a stored by the heat pump 2 at midnight the previous day was mainly used (main use), and was collected by the daytime solar heat collector 5 of the day. The first heat storage medium section 1b is used as a secondary when the usage amount is insufficient (sub-use).

  On the third day, the heat medium (hot water) of the first heat storage medium part 1b stored by the heat pump 2 at midnight the previous day was mainly used (main use), and was collected by the daytime solar heat collector 5 on that day. The first heat storage medium section 1a is used as a secondary when the usage amount is insufficient (sub-use).

  As described above, the heat medium of the first heat storage medium section 1a and the heat medium of the first heat storage medium section 1b are alternately stored by the heat pump 2 at midnight the previous day, and the heat medium is used on the night of the day. The heat collection by the solar heat collector 5 during the daytime is repeated for the heat medium of the first heat storage medium unit 1 that is not used on that day. For example, when the 1st heat storage medium part 1b is used like the 1st day, the temperature of the heat medium of the 1st heat storage medium part 1b of the 2nd day is newly added from the supply pipe 7a after the 1st day use. The lower temperature heating medium, in this embodiment, the heating medium, which is tap water, is lowered to near the temperature of the tap water, and the daytime solar heat against the heating medium of the first heat storage medium section 1b on the second day The heat collection by the heat collector 5 can greatly improve the heat collection efficiency.

  Further, the heat medium of the first heat storage medium part 1a on the second day is after the heat collection by the solar heat collector 5 in the daytime on the first day, and is stored to some extent, so that the second day The heat storage by the heat pump 2 at midnight can reduce the load and the energy consumption.

  A mixing valve control device 6 is provided at a junction where the heat mediums of the first heat storage medium portions 1a and 1b merge from the heat supply medium branch pipes 72 and 72 to the heat supply medium pipe 7b. The mixing valve control device 6 senses the temperature of the heat medium supplied from the first heat storage medium portions 1a and 1b to the heat supply medium pipe 7b, and becomes a heat medium close to a predetermined heat supply medium temperature. However, the heat medium of the heat storage medium section 1 having the higher normal temperature is mainly selected and used, and supplied to the heat supply medium pipe 7b.

  There is a high possibility of use as a hot water supply system in which two different types of heat sources, for example, a solar heat collector and a heat pump are used as two different heat sources. In other words, the heat collection efficiency of the solar heat collector and the energy efficiency coefficient of performance of the heat pump (COP = Coefficient of Performance = heating capacity (output) / heat pump power consumption (input)) are compared to the case where each is used alone. It can be widely used as a hot water supply system that hardly degrades.

The circuit block diagram which shows 1st Embodiment of this invention Circuit configuration diagram showing a second embodiment of the present invention Table showing control flow of embodiment of this invention

Explanation of symbols

1 1st heat storage medium part (hot water storage part)
1a 1st heat storage medium part (hot water storage part)
1b 1st heat storage medium part (hot water storage part)
2 Heat pump 20 Heat pump detection stop sensor 3a First heat medium circulation path 30 Inlet 3b Second heat medium circulation path 31 Outlet
4 Second heat storage medium (hot water storage)
4a Second heat storage medium (hot water storage)
4b Second heat storage medium section (hot water storage section)
5 Solar Heat Collector 50 Heat Exchanger 50a Heat Exchanger 50b Heat Exchanger 6 Mixing Valve Controller 7a Supply Pipe (Water Pipe)
70 Heat medium supply port 7b Heat supply medium pipe (hot water supply pipe)
71 Heat medium discharge pipe 72 Heat supply medium branch pipe 10a Multiple heat storage medium tanks 10b One heat storage medium tank

Claims (5)

  In a heat medium supply system that uses different types of heat sources, each of the first heat storage medium sections has a plurality of first heat storage medium sections, and each of the first heat storage medium sections is supplied with a heat medium heated by an arbitrarily heat source. A second heat storage medium part that includes a heat exchange part of a heat source that cannot be arbitrarily heated is provided so that the heat medium continues to all the first heat storage medium parts, and a plurality of first heat storage parts A heating medium supply system, characterized in that a heating medium heated alternately or sequentially in the medium section.   In a heat medium supply system using different types of heat sources, a first heat storage medium section capable of supplying a heat medium heated by a heat source that can be arbitrarily heated into a plurality of heat storage medium tanks, and cannot be arbitrarily heated A second heat storage medium part having a heat exchange part of a heat source provided so that the heat medium is continuous with each other, and the heat medium heated alternately or sequentially in the plurality of first heat storage medium parts A heating medium supply system that supplies and heats the second heat storage medium section by the heat exchange section to the first heat storage medium section that is not supplied with the heated heat medium.   In a heat medium supply system that uses different types of heat sources, a heat storage tank having a plurality of first heat storage medium sections in one heat storage medium tank and capable of arbitrarily heating into each first heat storage medium section The second heat storage medium part provided with the heat exchange part of the heat source that cannot be arbitrarily heated is provided so as to be continuous below each first heat storage medium part. And the heat-medium supply system characterized by supplying the heat medium heated alternately or in order in the some 1st heat storage medium part.   In a heat medium supply system that uses different types of heat sources, each of the first heat storage medium sections has a plurality of first heat storage medium sections, and each of the first heat storage medium sections is supplied with a heat medium heated by an arbitrarily heat source. A second heat storage medium part having a heat exchange part of a heat source that can be arbitrarily heated is provided so that the heat medium continues to all the first heat storage medium parts, and a plurality of first heat storage mediums The heating medium is characterized in that a heat medium heated alternately or in sequence is supplied into each section, and a mixing valve control device is provided at the junction of each heating medium branch pipe communicating from each first heat storage medium section. Medium supply system. The heat medium supply system according to any one of claims 1 to 4, wherein the arbitrarily heatable heat source is a heat source composed of a heat pump, and the unheatable heat source is a heat source composed of a solar heat collector.

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