JP2007248003A - Hot water supply heat source machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply heat source machine not requiring provision of a long water pipe between the heat source machine and a closed type tank even when the heat source machine is installed outdoors or the like, and having a large degree of freedom in an installation place such that it can be provided with cold region countermeasures. <P>SOLUTION: The hot water supply heat source machine 1 is provided for supplying hot water produced by a water heat exchanger 26 of a heat pump hot water supply device, the closed type tank 4 is provided for storing the supplied hot water produced by the water heat exchanger, an open type tank 7 is provided for storing the hot water supplied from the closed type tank, and a hot water supply passage 13 is provided for supplying the hot water of the open type tank. The hot water supply heat source machine is provided with a heat source unit 16 comprised by housing a compressor 19, a heat source side air heat exchanger 21, or the like in a first casing 25, and a water heat exchange unit 17 comprised by housing the water heat exchanger 26 in a second casing 29. It is composed such that the heat source unit 16 and the water heat exchange unit 17 can be arranged integrally or separately. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a large-capacity hot water supply system that uses a relatively large amount of hot water, such as a hospital, an elderly welfare facility, and a hotel, and more particularly to a hot water supply system that can expand the degree of freedom of installation of hot water supply system components.

  2. Description of the Related Art Conventionally, a heat pump water heater that combines a large number of heat source machines and a sealed tank has been proposed as a hot water system used in a business type that uses a large amount of hot water, such as a family restaurant, a welfare facility for the elderly, or a business hotel.

FIG. 4 of Patent Document 1 proposes a hot water supply system in which a plurality of sealed tanks to which a heat source device is attached and an open tank to which an electric heater is attached are combined in series.

  Such a system using a large number of sealed tanks has a problem that a large installation space is required and the price as a large-capacity system increases.

  Further, as shown in FIG. 10, the conventional hot water supply system used in such a system combines a heat source machine 73 equipped with a heat pump cycle 72 and a sealed tank 74 to supply hot water generated by the heat source machine 73. The water is stored in a sealed tank 74 via a pump 75 and a water pipe 76, and hot water is supplied from a hot water tap.

  The heat source unit 73 accommodates a cycle component 81 such as a compressor 77, a four-way valve 78, a pressure reducing mechanism 79, a heat source side heat exchanger 80, and a water heat exchanger 83 that constitute a heat pump cycle in a housing 82. ing.

In such a hot water supply system 71, the heat source unit 73 and the sealed tank 74 are communicated with each other through the water pipe 76. Therefore, the length of the water pipe 76 is limited due to the pump capacity of the hot water supply pump 75. Therefore, the installation place is limited. In addition, when installing the heat source device 73 outdoors, it is necessary to lay the water pipe outdoors. In addition, in the cold district, it is necessary to prevent freezing.
JP-A-6-18092

  The present invention has been made in consideration of the above-described circumstances, and can provide a hot water supply system that can supply a large volume of hot water, can increase the degree of freedom of installation of hot water supply system components, is easy to install, and is excellent in energy saving. The purpose is to provide.

  In order to achieve the above-described object, a hot water supply system according to the present invention includes a compressor, a water heat exchanger, a pressure reducing mechanism, and a heat heat exchange of a heat pump water heater that constitutes a refrigerant circuit in which a heat source side air heat exchanger is connected in order. A hot water supply heat source device that generates and supplies hot water in a water heater, a sealed tank that supplies and stores hot water generated by a water heat exchanger connected to a water heat exchange unit of the hot water heat source device through a water pipe, An open tank connected to the closed tank via a water pipe and storing hot water supplied from the closed tank; a hot water supply line connected to the open tank for supplying hot water from the open tank by a hot water pump; A hot water supply heat source machine is composed of the compressor, a heat source side air heat exchanger, a heat source unit in which the decompression mechanism is housed in a housing, and a water heat exchange unit in which a water heat exchanger is housed in the housing. , The heat source unit A water heat exchanger unit, characterized in that is configured to be integrally positioned with or separate by combining linked by refrigerant pipes housing.

  According to the hot water supply heat source device according to the present invention, a heat pump hot water supply heat source device, a sealed tank for supplying and storing hot water generated by the water heat exchanger, and an open type tank for storing hot water supplied from the sealed tank A hot water supply system that is easy to install and can supply large volumes of water, a heat source unit that houses a compressor, a decompression mechanism, a heat source side heat exchanger, etc., and a water heat exchange unit that houses a water heat exchanger, By connecting with a refrigerant pipe, it is not necessary to provide a long water pipe between the heat source machine and the sealed tank, even in a cold district. Expanding the degree of freedom of the location of each unit of hot water heat source equipment, such as the possibility of freezing water piping parts such as water heat exchange units that can freeze and installing them indoors separately from the heat source equipment installed outdoors Hot water supply cis It is possible to provide a beam.

  An example in which the hot water supply heat source apparatus according to the first embodiment of the present invention is incorporated in a hot water supply system will be described with reference to the accompanying drawings.

  FIG. 1 is a conceptual diagram of a hot water supply system incorporating a hot water supply heat source apparatus according to the first embodiment of the present invention.

  As shown in FIG. 1, first, an example will be described in which a heat source unit of a hot water supply heat source unit and a water heat exchange unit are installed close to each other.

  The hot water supply heat source apparatus 1 according to the first embodiment includes a heat pump cycle 2 that generates hot water and is used by being incorporated in a hot water supply system 3. Normally, the hot water supply system 3 is generated by the hot water supply heat source apparatus 1 and the hot water supply heat source apparatus 1. A closed tank 4 for storing hot water is installed in relatively close proximity.

  The hot water supply heat source 1 includes a sealed tank 4 connected via a water pipe 5 and an open tank 7 connected to the sealed tank 4 via a hot water supply pipe 6 for storing hot water supplied from the sealed tank 4. A hot water supply line 9 connected to the open type tank 7 to supply hot water from the open type tank 7 by a hot water supply pump 8, a number of hot water taps 10 connected to the hot water supply line 9, a circulation pump 11, and reheating. A hot water supply circulation path 13 including the device 12 is provided. The sealed tank 4 is appropriately replenished with water via an external water supply line 14 and a pressure reducing valve 15.

  The hot water supply heat source unit 1 includes a heat source unit 16 and a water heat exchange unit 17 and includes a heat pump cycle 2 formed by connecting the heat source unit 16 and the water heat exchange unit 17 with a refrigerant pipe 18.

  The heat source unit 16 includes a compressor 19, a four-way valve 20, a heat source side heat exchanger 21, a decompression mechanism 22, a first refrigerant pipe joint 23, and the like in a first housing 25, and the water heat exchange unit 17. Includes a water heat exchanger 26, a second refrigerant pipe joint 27, and a feed water pump 28 in a second housing 29, and includes a compressor 19, a four-way valve 20, a water heat exchanger 26, a pressure reducing mechanism 22, A heat pump cycle 2 in which the heat source side heat exchanger 21, the four-way valve 20, and the compressor 19 are sequentially piped using the refrigerant pipe 18 through both pipe joints 23 and 27 is formed.

  For example, in a state where the heat source unit 16 and the water heat exchange unit 17 are close to each other, and in a state where the water heat exchange unit 17 is relatively close, all of the sealed tank 4 and the open tank 7 are installed on the ground or on the roof of a building. To do.

  In this case, the heat source unit 16 and the water heat exchange unit 17 connect the pipe joints 23 and 27 of the heat pump cycle 2 with a short refrigerant pipe 18, and the water heat exchange unit 17 and the sealed tank 4 The first water pipe connection port 30 on the heat exchange unit 17 side and the second water pipe connection port 31 on the sealed tank 4 side are connected by a water pipe 5 composed of a relatively short hot water pipe 5h and a water pipe 5w, and sealed. The mold tank 4 and the open mold tank 7 are connected by a hot water supply pipe 6.

  Accordingly, the water pipe 5 does not require a long pipe, and the entire hot water supply system can be concentrated and arranged at one place.

  An example in which the heat source unit of the hot water supply heat source unit and the water heat exchange unit are installed remotely will be described with reference to FIG.

  For example, in FIG. 2, in order to perform hot water supply mainly on the first floor, the closed tank 4 and the open tank 7 are installed on the ground, and the water heat exchange unit 17 is disposed close to the closed tank 4, Only the heat source unit 16 is illustrated as being installed on the roof together with other air conditioner outdoor units (not shown).

  In this case, the refrigerant pipe 18 that connects the heat source unit 16 and the water heat exchange unit 17 is configured to be long, and the water pipe 5 that connects the water heat exchanger 26 and the sealed tank 4 and the closed tank 4 are opened. The hot water supply pipe 6 connecting the mold tank 7 is configured to be relatively short.

  Therefore, since the pipe 18 through which the refrigerant flows can correspond to a predetermined height and length relatively easily, even if the heat source unit 16 and the water heat exchange unit 17 are separated from each other, the performance may be affected. Since there are few, the installation allowable range of the installation place of a hot-water supply system can be expanded. Further, since the refrigerant pipe does not freeze even in a cold district like a water pipe, no anti-freezing measure is required.

  In addition, the example which installs the heat source unit of a hot-water supply heat source machine and a water heat exchange unit in the remote state is not only what is shown in FIG. 2, for example, the heat source unit is installed on the ground contrary to the installation example of FIG. The same applies to the case where the water heat exchange unit, the sealed tank 4 and the open tank 7 are installed on the roof of the building. In this case, there is an effect that it is possible to supply hot water to each floor from above by installing the open tank 7 on the roof of the building.

  The hot water supply heat source unit 1 is separated into a heat source unit 16 and a water heat exchange unit 17 in advance, but the heat source unit 16 and the water heat exchange unit 17 are placed on one bottom plate 33 as shown in FIG. If the heat source unit 16 and the water heat exchange unit 17 are installed close to each other, it can be installed while being attached to the bottom plate 33. Installation work becomes easy. When the heat source unit 16 and the water heat exchange unit 17 are installed in a separated state, the water heat exchange unit 17 is removed from the attachment bottom plate 33 and installed.

  Next, the boiling operation of the hot water supply system using the hot water supply heat source device of the first embodiment will be described.

  As shown in FIGS. 1 and 2, in the heat pump cycle 2, the refrigerant compressed to high temperature and high pressure by the compressor 19 flows into the water heat exchanger 26 through the refrigerant pipe 18, condenses, and dissipates heat. The condensed and liquefied refrigerant is depressurized by a decompression device 22 configured by an expansion valve or the like, and the refrigerant flowing into the heat source side heat exchanger 21 evaporates, takes heat from the atmosphere and gasifies, and enters the suction side of the compressor 19. The operation to be introduced is performed.

  On the other hand, water is supplied from the sealed tank 4 to the water heat exchanger 26 through the water pipe 5w, and this relatively low temperature water is converted into the high-temperature and high-pressure refrigerant of the heat pump cycle 2 by the water heat exchanger 26. The water is boiled and heated to hot water and supplied to the sealed tank 4 through the hot water pipe 5h.

  Further, when a predetermined amount of hot water supplied to the sealed tank 4 is stored, hot water is supplied from the sealed tank 4 to the open tank 7, and the hot water supplied to the open tank 7 is supplied by the hot water supply request of the hot water tap 10. The hot water supply pump 8 supplies hot water at a desired temperature from the hot water tap 10 that is supplied to the hot water supply circuit 13 and further formed in the hot water supply circuit 13.

  Also, until hot water is finished and the next hot water supply request is made, hot water stays in the hot water supply circulation path 13, and when the hot water becomes lower than a predetermined temperature, the reheating device 12 is operated to heat the hot water to a predetermined temperature or higher. keep.

  The hot water boiled in the hot water supply heat source unit 1 as described above is supplied to the sealed tank 4, and hot water is stored in the sealed tank 4, and hot water at a predetermined temperature or more is stored in the sealed tank 4. By the way, since the hot water is supplied to the open type tank 7 and the hot water is stored in the open type tank 7, the hot water supply heat source unit 1 is not a single unit having a large capacity, but a plurality of units can be provided according to the capacity of the system. By connecting in parallel, it is possible to support large capacity systems.

  According to the hot water supply heat source apparatus of the first embodiment, the installation distance between the heat source unit 16 and the water heat exchange unit 17 can be freely set by separating the heat source unit 16 and the water heat exchange unit 17 and connecting them with the refrigerant pipe. Even when the heat source unit 1 is installed outdoors and the sealed tank 4 is separated and arranged indoors, it is not necessary to provide a long water pipe between the heat source unit 1 and the sealed tank 4. A hot water supply heat source that can be installed in a wide range of places and is suitable for cold regions.

  Next, a hot water supply heat source apparatus according to the second embodiment of the present invention will be described.

  In the second embodiment, a bypass path is provided for selectively switching the connection between the water heating pipe 26a of the water heat exchanger 26 of the first embodiment and the water pipe from the sealed tank 4.

  As shown in FIG. 4, the hot water supply heat source device 41 of the second embodiment includes a first three-way valve 43 between the water pipe 5 w on the inlet side of the water heating pipe 26 a of the water heat exchanger 26 and the water supply pump 28. In addition, a second three-way valve 44 is interposed between the outlet side of the water heating pipe 26a and the hot water pipe 5h, and the first bypass 46 and the switching passage of both the three-way valves 43 and 44 are provided. The second bypass 47 is provided. By switching the two three-way valves 43, 44, the water flow in the water heating pipe 26a of the water heat exchanger 26 is normally configured so that the water pipe 5w communicates with the inlet side and the hot water pipe 5h communicates with the outlet side. In the dehumidifying operation, the water flow in the water heating pipe 26a is configured to communicate with the inlet side and the water pipe 5w with the outlet side by switching between the three-way valves 43 and 44.

  With this configuration, during the boiling operation in FIG. 4, the water from the sealed tank 4 is led from the water pipe 5w to the water heating pipe 26a of the water heat exchanger 26 and heated as shown in the flow of water indicated by the solid line arrow. It is operated to return to the closed tank 4 through the pipe 5h, and during the defrosting operation of the heat source side heat exchanger 21 of the heat source unit 41, the hot water in the closed tank 4 is poured into the hot water pipe like the flow of water indicated by the dotted arrow. The refrigerant flowing into the water heat exchanger 26 is heated by hot water from 5h to the water heating pipe 26a of the water heat exchanger 26.

  4, in the heat pump cycle 2 in FIG. 4, during the boiling operation, the refrigerant flows as indicated by solid arrows, the water heat exchanger 26 is a condenser, and the heat source side heat exchanger 21 is an evaporator. In the defrosting operation, the four-way valve 20 is switched to make a reverse cycle so that the water heat exchanger 26 is an evaporator and the heat source side heat exchanger 21 is operated. By making it act as a condenser, the operation | movement using the heat source of the hot water of the airtight tank 4 is performed.

  Accordingly, during the defrosting operation, a high-temperature and high-pressure refrigerant is caused to flow through the heat source side heat exchanger 21 that has acted as a condenser and frosted, and the water heat exchanger 26 that functions as an evaporator is heated by hot water from the sealed tank 4. Rapid defrosting can be performed by heating.

  Note that the heat source unit and the water heat exchange unit can be installed in a close state, separated, and installed in a remote state, as in the first embodiment.

  Since the other structure is not different from the hot water supply heat source device shown in FIG.

  Next, a hot water supply heat source apparatus according to a third embodiment of the present invention will be described.

  The third embodiment uses a plurality of hot water supply heat source devices, whereas the second embodiment uses one hot water supply heat source device.

  As shown in FIG. 5, the hot water supply heat source device 51 of the third embodiment includes a plurality of, for example, two hot water supply heat source devices 51A and 51B, which are described in the first and second hot water supply heat source devices 41 of the second embodiment of FIG. The first three-way valves 43a and 43b having the same function as the second three-way valves 43 and 44, and the second three-way valves 44a and 44b, and the hot water supply heat source devices 51A and 51B are hermetically sealed. Connect to the tank 4 in parallel.

  As a result, high-temperature and high-pressure refrigerant flows through the frosted heat source side heat exchangers 21a and 21b that act as condensers, and the water heat exchangers 26a and 26b that act as evaporators are heated by hot water from the sealed tank 4. By performing the defrosting operation to be performed for each heat source unit in turn and boiling up other heat source units, quick defrosting can be performed, and even if the heat source unit is not of a large capacity, the system By connecting a plurality of units in parallel according to the capacity, it is possible to suppress the temperature drop of the hot water in the sealed tank 4 even during the defrosting operation, and it is possible to cope with a large capacity system.

  Moreover, the hot water supply heat source machine which concerns on 4th Embodiment of this invention is demonstrated.

  In the fourth embodiment, a relatively small-capacity sealed tank that functions as a sealed tank is built in the hydrothermal exchange unit of the first embodiment.

  For example, an example is shown in which a sealed tank is installed in a state close to a hot water supply heat source machine.

  As shown in FIGS. 6 and 7, the hot water supply heat source unit 61 of the fourth embodiment includes a heat source unit 16 and a water heat exchange unit 17 installed in the vicinity of the heat source unit 16. Incorporates a cylindrical sealed tank 62, and in a state where the water heat exchanger 63 composed of the refrigerant pipe 63r and the water heating pipe 63h arranged so that the refrigerant and the hot water flow in the opposite flow is in heat-conducting contact. It is wound around the sealed tank 62. Further, the water heat exchanger 63 and the sealed tank 62 are covered with a heat insulating material 64 to improve the boiling efficiency.

  The sealed tank 62 is provided with a hot water receiving port 62a that communicates with the water heating pipe 63h at the upper part, a hot water supply port 62b that communicates with the hot water supply pipe 6 to the open type tank, and a lower part that communicates with the external water supply pipe 14. A defrosting hot water receiving port 62d communicating with the water supply receiving port 62c and the water heating pipe 63h is provided.

  The water flow path in the water heat exchange unit 17 is formed as follows.

For example, as shown in FIG. 8, the first three-way valve 43 connected to the external water supply line 14 via the pressure reducing valve 15 is connected to the water heating pipe via the water supply pump 28 as a flow path at the time of boiling. The outlet of the water heating pipe 63h is connected to the second three-way valve 44, and the second three-way valve 44 is connected to the hot water supply port 62a. Therefore, at the time of boiling, water supplied through the first three-way valve 43 is introduced into the water heating pipe 63h by the water supply pump 28, and exchanges heat with the refrigerant pipe 63r through which the high-temperature and high-pressure refrigerant flows. It is boiled and stored in the sealed tank 62 through the second three-way valve 44 and the hot water receiving port 62a.

  On the other hand, as shown in FIG. 9, the flow path for defrosting is switched between the first three-way valve 43 and the second three-way valve 44, thereby allowing the hot water receiving port 62 a and the first bypass 65 to pass through. The first three-way valve 43 to be connected is connected to the inlet of the water heating pipe 63h via the feed water pump 28, and the outlet of the water heating pipe 63h is connected to the second three-way valve 44. The second three-way valve 44 is connected to the defrosting hot water receiving port 62d through the second bypass 66. Therefore, during defrosting, the hot water in the sealed tank 62 flows to the first bypass 65 via the hot water receiving port 62a, and further, the water heating pipe 63h is connected via the first three-way valve 43 and the water supply pump 28. Heat exchange with the refrigerant pipe 63r through which the low-temperature and low-pressure refrigerant flows is introduced into the inlet, and the hot water temperature decreases, and the defrosting hot water receiving port 62d passes through the second three-way valve 44 and the second bypass 66. Flows into the sealed tank 62. In the reverse cycle defrosting operation in which a high-temperature and high-pressure refrigerant is allowed to flow through the frosted heat source side heat exchanger 21 during the boiling operation, it can be quickly removed by acting as a heat source of the refrigerant pipe 63r that functions as an evaporator. Frost can be done.

  In addition, since the water heat exchanger 63 and the sealed tank 62 are integrally provided, even when the heat source unit 16 is installed remotely from the water heat exchange unit 17, the water heat exchanger 63 and the sealed tank 62 are not connected. In addition, no long water pipe is required, the installation location of the hot water supply system is not limited, freezing does not occur in a cold region, and no freeze prevention measures are required.

The conceptual diagram of the hot water supply system incorporating the hot water supply heat source machine which concerns on 1st Embodiment of this invention. The conceptual diagram which shows the installation state of the hot water supply heat source machine which concerns on 1st Embodiment of this invention. The conceptual diagram at the time of shipment of the hot water supply heat source machine which concerns on 1st Embodiment of this invention. The conceptual diagram of the hot water supply heat source machine which concerns on 2nd Embodiment of this invention. The conceptual diagram of the hot water supply heat source machine which concerns on 3rd Embodiment of this invention. The conceptual diagram of the hot water supply heat source machine which concerns on 4th Embodiment of this invention. The conceptual diagram of the water heat exchange unit of the hot-water supply heat source machine which concerns on 4th Embodiment of this invention. The conceptual diagram which shows the flow of the hot water at the time of boiling of the hot-water supply heat source machine which concerns on 4th Embodiment of this invention. The conceptual diagram which shows the flow of the hot water at the time of defrosting of the hot water supply heat source machine which concerns on 4th Embodiment of this invention. The conceptual diagram of the hot-water supply system incorporating the conventional hot-water supply heat source machine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hot water supply heat source machine, 2 ... Heat pump cycle, 3 ... Hot water supply system, 4 ... Sealed tank, 5 ... Water piping, 5h ... Hot water pipe, 5w ... Water pipe, 6 ... Hot water supply pipe, 7 ... Open type tank, 8 ... Hot water supply Pump, 14 ... External water supply pipe line, 16 ... Heat source unit, 17 ... Water heat exchange unit, 18 ... Refrigerant piping, 21 ... Heat source side heat exchanger, 25 ... First housing, 26 ... Water heat exchanger, 29 ... second housing, 33 ... bottom plate.

Claims (5)

A hot water supply heat source machine that generates and supplies hot water with a water heat exchanger of a heat pump hot water supply apparatus that constitutes a refrigerant circuit in which a compressor, a water heat exchanger, a decompression mechanism, and a heat source side air heat exchanger are connected in series, and
A sealed tank that is connected to a water heat exchange unit of this hot water supply heat source unit through a water pipe and supplies and stores hot water generated by the water heat exchanger,
An open type tank that stores hot water supplied from the sealed tank connected to the sealed tank via a water pipe,
A hot water supply line connected to the open tank and supplying hot water from the open tank by a hot water pump;
The hot water supply heat source machine includes a heat source unit in which the compressor, the heat source side air heat exchanger, and the pressure reducing mechanism are housed in a housing;
The water heat exchanger is composed of a water heat exchange unit housed in a housing, and
A hot water supply system characterized in that the heat source unit and the water heat exchange unit are connected by a refrigerant pipe and a casing is combined to be integrated or separated so as to be arranged. 2. The hot water supply system according to claim 1, wherein the closed tank is housed in a housing and connected to the water heat exchange unit and the open tank by a water pipe. The hot water supply system according to claim 1, wherein the sealed tank is built in the water heat exchange unit. The hot water supply heat source apparatus according to claim 3, wherein the water heat exchanger is disposed around the sealed tank. The hot water supply heat source machine according to claim 1, wherein the heat source unit and the water heat exchange unit are arranged on a single bottom plate, and the water heat exchange unit is configured to be separable from the bottom plate.

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