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Heat pump type hot water supply apparatus

Inactive Publication Date: 2010-04-29
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0041]As apparent from the above description, according to the heat pump type hot water supply apparatus of the invention, the heat exchange efficiency of the hot water supply heat exchanger can be improved with a simple construction, making it implementable to realize a heat pump type hot water supply apparatus capable of supplying high-temperature hot water.

Problems solved by technology

Such a heat pump type hot water supply apparatus using a hot water supply heat exchanger has a problem that it is difficult to realize a hot water supply heat exchanger capable of fulfilling efficient heat exchange between the hot water within the hot water tank and the supplied hot water.

Method used

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  • Heat pump type hot water supply apparatus

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first embodiment

[0059]First, FIG. 1 shows a construction of a heating and hot water supply apparatus using a heat pump type hot water supply apparatus according to a first embodiment of the invention. This heating and hot water supply apparatus is constituted by a hot water supply unit which includes a hot water tank 1, a hot water supply heat exchanger 10 and an endothermic heat exchanger 42; a heat pump unit 2 which includes a compressor 3, a radiative heat exchanger 41, an expansion valve 5 and an endothermic heat exchanger 6; and a radiator 30 as an example of a heating terminal, and the like.

[0060]The hot water tank 1 has a longitudinally elongate cylindrical-shaped closed housing in which water W0 is internally stored generally up to a vicinity of an upper end while the later-described hot water supply heat exchanger 10 is placed over a range from a top 1a to a bottom 1b.

[0061]The hot water supply heat exchanger 10 is so constructed that a heat transfer tube of a specified diameter is first ...

second embodiment

[0086]Next, FIG. 4 shows a construction of a heating and hot water supply apparatus using a heat pump type hot water supply apparatus according to a second embodiment of the invention. This heating and hot water supply apparatus is basically similar in construction to the heating and hot water supply apparatus of the first embodiment, but differs therefrom in that a tube diameter of the lower-stage side portion 10b of the hot water supply heat exchanger 10 is set thinner than a tube diameter of the other upper-stage side portion 10a, whereas the heating and hot water supply apparatus of the first embodiment is so set that the entire range from the upper-stage side portion 10a to the lower-stage side portion 10b is equal in tube diameter.

[0087]With this construction, in the lower-stage side portion 10b of the hot water supply heat exchanger 10, water W1 flows through inside thereof at higher flow velocity, making the heat transfer rate to be improved correspondingly so that the amoun...

third embodiment

[0090]Next, FIG. 5 shows a construction of a heating and hot water supply apparatus using a heat pump type hot water supply apparatus according to a third embodiment of the invention. This heating and hot water supply apparatus is also similar in basic construction to the heating and hot water supply apparatus of the first embodiment. However, their difference is that whereas the heating and hot water supply apparatus of the first embodiment is so set that the entire range from upper end to lower end of the hot water supply heat exchanger 10 is uniform in a coil-portion pitch as well as in an outer diameter of its heat-transfer-tube coil portion, the coil portion in this embodiment is formed in such a helical state that the pitch of the coil portion is smaller in the lower-stage side portion 10b than in the upper-stage side portion 10a and moreover the outer diameter of the coil portion is so reduced as to gradually decrease toward the lower end.

[0091]With such a construction, in th...

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Abstract

A heat pump type hot water supply apparatus includes a heat-source side heat pump unit 2 for heating water, a hot water tank 1 for storing therein hot water heated by the heat-source side heat pump unit 2, and a hot water supply heat exchanger 10 which is placed in the hot water tank 1 and in which water flows from lower side toward upper side of interior thereof. There is provided a difference between heat exchange performance of a lower-stage side portion 10b and heat exchange performance of an upper-stage side portion 10a of the hot water supply heat exchanger 10.

Description

TECHNICAL FIELD[0001]The present invention relates to heat pump type hot water supply apparatuses for heating water in a hot water tank by a heat pump unit and for heating, by the heated water in the hot water tank, water flowing through within a hot water supply heat exchanger placed in the hot water tank with a view to supplying hot water.BACKGROUND ART[0002]Conventionally, there has been provided a heat pump type hot water supplier which includes a heat pump unit for heating water, and a hot water tank for storing hot water heated by the heat pump unit, to fulfill heating and hot water supply by utilizing the hot water stored in the hot water tank (see, e.g., JP 2006-329581 A).[0003]While the heat pump type hot water supply apparatus described above is so designed that hot water stored in the hot water tank is outputted as it is, another heat pump type hot water supply apparatus is also available in which a hot water supply heat exchanger is placed within the hot water tank in te...

Claims

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Application Information

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IPC IPC(8): F28D7/02
CPCF24D3/087F24D11/0228Y02E60/142Y02B30/126Y02B10/70F28D2020/0078F28D20/0034F24D2220/209F24D2200/12F24D2200/08F24D2220/06F24D2240/12F24D2220/08F24D2240/10F24D2240/20F24D2240/22F24D3/18F24H4/04F28D1/0213F28D1/0472F28F13/08Y02B30/12Y02E60/14F28F2210/08
Inventor FURUI, SYUUJINUMATA, MITSUHARU
Owner DAIKIN IND LTD
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