JP2001021218A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a whole instrument compact by providing a partition plate for defining a heat exchange chamber and a gas exhaust chamber in a second heat exchanger disposed above a first heat exchanger. SOLUTION: A second heat exchanger 3 as a drain-producing part is provided above a first heat exchanger 2 as a drain-nonproducing part, and a partition plate 4 is provided in the interior of the second heat exchanger 3 so as to define a heat exchange chamber 5 as the drain producing part and a gas exhaust chamber 7 for collecting exhaust gas. The partition plate 4 is disposed so as to cover a meandering flexible water pipe 7 provided in the heat exchanger 5. A drain receiving plate 11 is provided below the water pipe 7 so as to vaporize the drain. By this constitution, the height of an instrument can be made short so that volume of a whole water heater can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply apparatus equipped with a high-efficiency heat exchanger including a second heat exchanger as a drain generator and a first heat exchanger as a non-drain generator. .

[0002]

2. Description of the Related Art Conventionally, a water heater equipped with a high-efficiency heat exchanger combining a first heat exchanger for recovering sensible heat and a second heat exchanger for recovering latent heat has been developed. .
As shown in FIG. 3, such a water heater has a fan 105 for blowing air and a first heat exchanger 102 as a drain non-generating section, and a drain generating section in order from a burner case 101 containing a gas burner to a downstream side. Second as a part
The heat exchanger 103 is configured by stacking an exhaust collecting tube 104 that collects the exhaust gas and guides the exhaust gas after combustion outside the apparatus.

[0003]

However, in the case where the exhaust collecting tube is mounted on the upper part of the second heat exchanger, not only each of them requires a mounting flange but also a member for mounting and fixing is separately provided. For this reason, there is a problem that the volume of the device is increased in the longitudinal direction of the device, and the entire device is enlarged. Further, when the exhaust gas exits from the outlet of the collecting cylinder, the temperature of the exhaust gas is considerably lowered, so that there is a problem that white smoke is generated.

[0004] In view of the above problems, it is an object of the present invention to provide a hot water supply apparatus in which the entire heat exchanger is made compact and white smoke is prevented by improving the second heat exchanger.

[0005]

In order to solve the above problems, a hot water supply apparatus according to the present invention comprises a heat exchanger comprising a second heat exchanger as a drain generator and a first heat exchanger as a non-drain generator. A hot water supply device equipped with an exchanger, wherein a second heat exchanger located above a first heat exchanger collects a heat exchange chamber serving as a drain generation unit and exhaust gas inside the second heat exchanger. The first feature is that a partition plate for partitioning the exhaust chamber is provided. The second feature of the hot water supply apparatus of the present invention is that, in addition to the first aspect, the partition plate comprises a horizontal plate having no opening and a vertical plate having an opening. Further, in the hot water supply apparatus of the present invention, in addition to the first and second aspects, a main exhaust passage for guiding exhaust gas to the outside of the apparatus via a heat exchange chamber as a drain generation unit inside the second heat exchanger. And a bypass exhaust passage for guiding exhaust gas to the outside of the apparatus without passing through the heat exchange chamber.

According to the first feature, the height of the appliance in the vertical direction can be reduced, and the volume of the entire hot water supply device can be reduced. According to the second feature,
The inside of the second heat exchanger can be partitioned so as to surround the water pipe of the heat exchange chamber, and the recovery efficiency of latent heat can be improved. According to the third feature, the relatively low-temperature exhaust gas flowing through the main exhaust passage and the relatively high-temperature exhaust gas flowing through the bypass exhaust passage are mixed at a position just before the outlet of the appliance. In comparison, the temperature of the exhaust gas can be raised, and white smoke can be prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged view of a main part of a hot water supply apparatus showing one embodiment of the present invention. FIG. 2 is an enlarged view of a main part showing another embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a water heater such as a gas water heater, a water heater with a bath, a water heater with a heating function, and a water heater with a drying function. Reference numeral 2 denotes a heat exchanger of the hot water supply apparatus, which is a first heat exchanger as a drain non-generating section. Above the first heat exchanger 2, a second heat exchanger 3 as a drain generating section is provided. is there. A partition plate 4 is provided inside the second heat exchanger 3 and is divided into a heat exchange chamber 5 as a drain generation unit and an exhaust chamber 6 for collecting exhaust gas. Reference numeral 7 denotes a water pipe provided in the heat exchange chamber 5, which is formed in a meandering shape by a flexible water pipe. The partition plate 4 is provided so as to cover the water pipe 7 and includes a horizontal plate 8 having no opening and a vertical plate 10 having an opening 9 following the horizontal plate 8. A drain receiving plate 11 is provided below the water pipe 7 to evaporate the drain. Reference numeral 12 denotes a drain discharge pipe. Reference numeral 13 denotes an exhaust guide plate provided in the exhaust chamber 6, and a noise reduction member for noise reduction may be attached in the exhaust chamber 6 to attenuate the exhaust noise. 14 is an exhaust outlet.

FIG. 2 shows another embodiment of the present invention. The difference from FIG. 1 is that a main exhaust passage 15 for guiding exhaust gas to the outside of the apparatus through a heat exchange chamber 5 is provided separately. There is a bypass exhaust passage 16 that guides exhaust gas to the outside of the apparatus without passing through the heat exchange chamber 5. The bypass exhaust passage 16 is formed by raising the end of the horizontal plate 4, but is not limited to this example. In short, the exhaust gas passes through the heat exchange chamber 5 provided with the water pipe 7 and is guided to the outlet. In addition to the main exhaust passage, a bypass exhaust passage that exhausts exhaust gas to the outside of the device in a bypass manner may be provided inside the second heat exchanger.

According to the present invention, the exhaust gas that has passed through the first heat exchanger 2 during the combustion of the appliance is recovered in latent heat by the water pipe 7 of the heat exchange chamber 5 and passes through the opening 9. The gas is guided by the exhaust guide plate 13 to make a U-turn, and is discharged to the outside of the device from the exhaust opening 14 of the exhaust chamber 6. Since the inside of the second heat exchanger is partitioned by the partition plate 4 into a heat exchange chamber 5 as a drain generation unit and an exhaust chamber 6 for collecting exhaust gas, there is no need to separately provide a mounting part such as a flange, and the overall height is reduced. Can be reduced. Moreover, once the exhaust gas is collected in the exhaust chamber 6, the entire second heat exchanger 3 can be configured to be flat, with one exhaust outlet.

If the water pipe 7 is made of a flexible stainless steel pipe, the assemblability of the second heat exchanger 3 is improved and the durability is improved. Further, the drain receiving plate 1
By arranging 1 below the water pipe 7, the dripped drain can be evaporated and the drain can be quickly discharged.
Further, the exhaust guide plate 13 is moved from the exhaust outlet 14 side to the exhaust chamber 6.
, It is possible to attenuate the exhaust noise of the exhaust gas and to reduce the noise. Further, if the exhaust guide plate 13 is arranged so as to be slightly inclined upward in the depth direction, the flow of the exhaust gas becomes smooth and the combustibility can be improved.

Further, the present invention, as shown in FIG.
By providing a bypass exhaust passage for guiding the exhaust gas to the outside of the device without passing through the heat exchange chamber inside the second heat exchanger, separately from the main exhaust passage for guiding the exhaust gas to the outside of the device via Mixing high-temperature exhaust gas and relatively low-temperature exhaust gas inside the device without increasing the size of the device,
It was possible to prevent a decrease in the exhaust gas temperature and to prevent the exhaust gas from becoming white smoke.

[0013]

According to the present invention, the second heat exchanger as the drain generator and the first heat exchanger as the non-drain generator are provided. A hot water supply apparatus equipped with a heat exchanger comprising: a second heat exchanger positioned above a first heat exchanger; a heat exchange chamber serving as a drain generation unit; Since the partition plate is provided for partitioning the water heater into an exhaust chamber, the height of the appliance in the vertical direction can be reduced, and the volume of the entire water heater can be reduced. According to the arrangement of the second aspect, in addition to the arrangement of the first aspect, the partition plate includes a horizontal plate having no opening and a vertical plate having the opening, so that the water pipe of the heat exchange chamber is provided. The inside of the second heat exchanger can be partitioned so as to surround it, and the recovery efficiency of latent heat can be improved. According to the third aspect, in addition to the first and second aspects, the exhaust gas is supplied to the outside of the apparatus via a heat exchange chamber serving as a drain generator inside the second heat exchanger. Since a main exhaust passage for guiding the exhaust gas and a bypass exhaust passage for guiding the exhaust gas to the outside of the apparatus without passing through the heat exchange chamber are provided, the exhaust gas having a relatively low temperature flowing through the main exhaust passage and the exhaust gas flowing through the bypass exhaust passage are provided. Since the exhaust gas having a relatively high temperature is mixed just before the outlet of the device, the temperature of the exhaust gas can be increased as compared with the conventional exhaust gas, and white smoke can be prevented.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the present invention.

FIG. 3 is an overall configuration diagram showing a conventional example.

[Explanation of symbols]

 2 First heat exchanger 3 Second heat exchanger 4 Partition plate 5 Heat exchange chamber 6 Exhaust chamber 7 Water pipe 8 Horizontal plate 9 Opening 10 Vertical plate 15 Main exhaust passage 16 Bypass exhaust passage

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shuji Kameyama 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref. (72) Inventor Takahiro Matsuda 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Norritsu Inc. (72) Inventor Ryoji Kutuna 93, Edo-cho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Co., Ltd. (72) Inventor Hidenori Hata 93, Edo-cho, Chuo-ku, Kobe City, Hyogo Pref. Masahiko Shimazu 93, Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref. (72) Inventor Masaru Hiroyasu 93, Edo-cho, Chuo-ku, Kobe-shi, Hyogo F-term (reference) 3L034 BA23 BA25

Claims (3)

[Claims] 1. A hot water supply device comprising a heat exchanger including a second heat exchanger as a drain generation unit and a first heat exchanger as a drain non-generation unit, wherein the water heater is provided above the first heat exchanger. A hot water supply apparatus, wherein a partition plate that partitions the inside of the second heat exchanger into a heat exchange chamber as a drain generation unit and an exhaust chamber that collects exhaust gas is provided in the located second heat exchanger. 2. The hot water supply apparatus according to claim 1, wherein the partition plate comprises a horizontal plate having no opening and a vertical plate having an opening. 3. A main exhaust passage for guiding exhaust gas to the outside of the apparatus via a heat exchange chamber as a drain generating unit inside the second heat exchanger, and an exhaust gas without passing through the heat exchange chamber. The hot water supply device according to claim 1, further comprising a bypass exhaust passage leading to the outside.