JP5882841B2 - Hot water storage water heater with built-in non-self-contained circulation pump - Google Patents

Description

  The present invention relates to a hot water storage type hot water heater in which a hot water in a hot water storage tank is circulated in a heat exchanger for heating water to be heated.

  Conventionally, as shown in Patent Document 1, a hot water storage water heater incorporating this type of non-self-contained circulation pump is provided with a non-self-contained circulation pump between a hot water storage tank and a front panel in two upper and lower stages via mounting brackets. These non-self-contained circulation pumps were placed sideways with the discharge port facing upward and the suction port sideways, and a drain plug was provided in the pump chamber containing the impeller.

  Further, Patent Document 2 discloses a mounting bracket embedded in a foam molded heat insulating material surrounding a hot water storage tank.

  In addition, in the product marketed by the present applicant, Ecocute (registered trademark) multi-function type model name CHP-H46111AT has a circulation pump disposed forward in a two-story box-shaped mounting frame. there were.

JP 2002-22271 A JP 2012-17980 A

  In recent years, as a result of cost reduction and downsizing of non-self-contained circulation pumps, the drain plugs conventionally provided directly in the pump chamber have been abolished, and it is necessary to attach a drain plug separately.

  However, with the conventional arrangement, if a drain plug is provided on the upward discharge port side, the water cannot be drained, and the circulation pump is arranged by rotating it sideways so that the discharge port is at the bottom of the pump chamber. If a drain plug is provided at the discharge port, the drain plug protrudes forward and it is necessary to widen the space between the hot water storage tank and the front panel so that the front panel and the drain plug do not interfere with each other. There was a problem that the hot water storage type water heater would become large.

  Further, in the case where the mounting plate is embedded in the foam molded heat insulating material as in Patent Document 2, it is necessary to use a foam molded heat insulating material having high strength in consideration of the vibration of the circulation pump due to transportation vibration. If the strength is lowered and the heat insulating property is lowered, the heat insulating property is inferior. If the heat insulating material is thickened to secure the heat insulating property, there is a problem that the hot water storage type hot water heater becomes large.

  Further, in a box-shaped mounting frame such as the product of the present applicant, the mounting frame occupies a large space, and the configuration of the mounting frame is complicated and expensive.

In order to solve the above problems, the present invention provides a hot water storage tank for storing hot water, a heater for heating the hot water in the hot water storage tank, and heating external heated water using the hot water in the hot water storage tank as a heat source. A heat exchanger, a non-self-priming primary circulation pump that guides hot water in the hot water storage tank to the primary side of the heat exchanger, an exterior body that is open on the front surface and accommodates the hot water storage tank, and an opening of the exterior body A hot water storage hot water heater having a built-in non-self-contained circulation pump, comprising a front panel that covers the front surface and a mounting plate that attaches the primary circulation pump to the exterior body, wherein the mounting plate is a side surface of the exterior body The primary-side circulation pump has a suction port in front of the primary-side circulation pump, a discharge port in a direction perpendicular to the front, and a tip of the discharge port. A drain plug is provided on the front In through the mounting plate corner space between the hot water storage tank and the side surface of the outer body said the front panel, a back surface of the primary side circulation pump is opposed to the hot water storage tank, and wherein the direction of the discharge port before The predetermined angle formed with the center side of the panel is attached in an attitude that becomes an obtuse angle.

Further, the mounting plate has a structure in which a flat plate is bent at a predetermined obtuse angle, one surface of the bent flat plate is fixed to the front side inside the side surface of the exterior body, and the other surface is positioned closer to the hot water storage tank, The primary side circulation pump is attached to the other surface, so that the predetermined angle formed by the direction of the discharge port of the primary side circulation pump and the center side of the front panel is an obtuse angle .

Further, a non-self-contained secondary side circulation pump that circulates the water to be heated is provided on the secondary side of the heat exchanger, and the secondary side circulation pump has an inlet port in front of the secondary side circulation pump. And having a discharge port in a direction perpendicular to the front surface, a drain plug provided at the tip of the discharge port, and being attached to the other surface of the mounting plate above or below the primary circulation pump The predetermined angle formed by the direction of the discharge port of the secondary circulation pump and the center side of the front panel is attached in a posture that becomes an obtuse angle.

  The primary circulation pump and / or the secondary circulation pump includes a mounting auxiliary plate that is orthogonal to the suction port and extends in a substantially vertical direction, and is attached to the other surface of the mounting plate by the mounting auxiliary plate. The primary circulation pump and / or the secondary circulation pump is cantilevered.

  According to the present invention, the space in the depth direction occupied by the circulation pump can be made compact while ensuring water drainage, the hot water storage type water heater can be miniaturized, and the pipe connection to the suction port and the drain plug It was easy to handle operations from the front, improving assembly and maintenance.

  In addition, the mounting plate has a simple structure, which can contribute to reduction of occupied space and cost reduction, and a circulation pump can be arranged in a space with a wide space from the front panel on the front side of the hot water tank. The size of the water heater can be further reduced.

Schematic configuration diagram of one embodiment of the present invention The perspective view which showed only the principal part of the same embodiment Perspective view of circulation pump and mounting plate of the same embodiment Cross-sectional view of relevant parts for explaining the mounting posture of the circulation pump of the same embodiment

Next, a hot water storage type water heater according to an embodiment of the present invention will be described with reference to the drawings.
This hot water storage type hot water heater is composed of a tank unit 1 and a heat pump unit 2 as a heater. In FIG. 1, 3 is a hot water storage tank for storing hot water, 4 is a water supply pipe for supplying water to the bottom of the hot water storage tank 3, and 5 is hot water storage. A hot water supply pipe for supplying hot water from the upper part of the tank 3, a heating forward pipe for connecting the bottom of the hot water storage tank 3 and the inlet of the heat pump unit 2, a heating return pipe for connecting the outlet of the heat pump unit 2 to the upper part of the hot water storage tank 3, and 8 for hot water storage. A heat exchanger for heating the heated circulating water, which is external non-heated water, using hot water in the tank 3 as a heat source, 9 is a primary side outgoing pipe connecting the upper part of the hot water storage tank 3 and the inlet of the heat exchanger 8; 10 is a primary return pipe that connects the outlet of the primary side of the heat exchanger 8 and the intermediate part of the hot water storage tank 3, and 11 is a non-self-priming primary that guides and circulates the hot water in the hot water storage tank 3 to the primary side of the heat exchanger 8. Side circulation A pump, 12 is a secondary return pipe connecting the outlet of the heating terminal (not shown) and the inlet of the heat exchanger 8 secondary side, and 13 is an outlet of the heat exchanger 8 secondary side and the inlet of the heating terminal. 14 is a non-self-contained secondary circulation pump that guides and circulates the heated circulating water to the secondary side of the heat exchanger 8.

  FIG. 2 is a perspective view in which parts other than the main part are removed so that the main part can be easily seen. 15 is an exterior body that opens the front surface of the tank unit 1 and covers the top, back, both sides, and bottom. Connection for connecting pipes in the unit 1 (water supply pipe 4, hot water supply pipe 5, heating forward pipe 6, heating return pipe 7, secondary side return pipe 12, secondary side forward pipe 13) and corresponding external pipes A pipe connection plate 17 provided with concentrated ports and provided so as to protrude to the front side at a slightly higher position from the lowest surface of the exterior body 15, 17 is a front panel that easily covers the open front surface of the exterior body 15 , 18 is a support leg for supporting the tank unit 1, 19 is a mounting plate for fixing the primary side circulation pump 11 and the secondary side circulation pump 14, and 20 is a water drain in the primary side circulation pump 11 and the secondary side circulation pump 14. It is a drain plug to do.

  As shown in FIG. 3, the primary side circulation pump 11 and the secondary side circulation pump 14 are constituted by non-self-contained pumps in which a drain plug is not directly provided in the pump chamber, and the suction ports 11 a and 14 a are provided. It has a discharge port 11b, 14b in the tangential direction of the pump chamber on a plane perpendicular to the front surface at the center of the pump chamber on the front side, and a drain plug 20 is separately provided at the tip of the discharge ports 11b, 14b. It is what.

  As shown in FIG. 3, the mounting plate 19 has a structure in which the flat plate is bent at a predetermined obtuse angle (30 ° to 60 °, preferably 40 ° to 50 °) so that the folds are substantially vertical. A fixing portion 19c for fixing to the inner surface of the exterior body 15 with a screw on one surface 19a, and a screw hole (not shown) for fixing the primary side circulation pump 11 and the secondary side circulation pump 14 to the other surface 19b. The fixing portion 19c is configured to bulge to the mounting surface side so that the exterior body 15 and one surface 19a of the mounting plate 19 do not come into full contact with each other, so that the other surface 19b is closer to the hot water storage tank 1. One surface 19 a is fixed to the front side on the inner side of the left side surface of the exterior body 15.

  Further, a mounting portion 19d bent inward is provided at the lower end of the one surface 19a and the other surface 19b of the mounting plate 19, and this mounting portion 19d is mounted and fixed on the pipe connection plate 16 to be firmly primary. The side circulation pump 11 and the secondary side circulation pump 14 are supported, and further, a tongue portion 19e extending downward from the pipe connection plate 16 is provided at the lower end of the one surface 19a. Some are inserted into positioning holes (not shown) opened in the plate 16 to facilitate positioning of the mounting plate 19 during assembly.

  The primary side circulation pump 11 and the secondary side circulation pump 14 are provided with a plurality of fixing holes in the vicinity of the outer peripheral part of the outer shell, so that the discharge ports 11b and 14b are oriented slightly downward from the horizontal. 19 through a mounting auxiliary plate 21 and a bushing rubber 22 which are orthogonal to the suction ports 11a and 14a and extend in a substantially vertical direction so that the direction of the suction ports 11a and 14a is parallel to the other surface 19b. And cantilevered.

  Here, the bush rubber 22 prevents the pump vibration from being transmitted to the exterior body 15 via the mounting plate 19, and the one surface 19 a of the mounting plate 19 by the bulging fixing portion 19 c of the one surface 19 a of the mounting plate 19. The contact area between the outer casing 15 and the outer casing 15 is reduced, and the occurrence of contact chatter noise between the one surface 19a of the mounting plate 19 and the outer casing 15 is suppressed.

  In this way, the primary side circulation pump 11 and the secondary side circulation pump 14 are attached to the space between the front panel 17 and the hot water storage tank 3 via the attachment plate 19, and as shown in FIG. The circulation pump 11 and the secondary circulation pump 14 form a predetermined obtuse angle with the front panel 17, and the discharge ports 11b and 14b can be easily installed in a posture slightly downward from the horizontal, ensuring drainage. However, the space in the depth direction occupied by the circulation pumps 11 and 14 can be made compact, the hot water storage type water heater can be miniaturized, and the piping connection to the suction port 11a and the operation of the drain plug 20 can be performed from the front. It was easy to handle and improved assembly and maintenance.

  The present invention is not limited to the above-described embodiment. For example, the heater is not limited to the heat pump unit 2, and may be an electric heater provided in the hot water storage tank 3, and the heat exchanger 8. Is a heat exchanger for heating, but is not limited thereto, and may be a heat exchanger for heating bath water or a heat exchanger for hot water supply.

  Further, the configuration is not limited to the configuration including both the primary side circulation pump 11 and the secondary side circulation pump 14, and any configuration including at least one primary side circulation pump 11 may be used. Although the configuration provided on the left side of the unit 1 has been described, the configuration provided on the right side may be used as a configuration that is reversed left and right.

2 Heat pump unit (heater)
3 Hot Water Storage Tank 8 Heat Exchanger 11 Primary Circulation Pump 11a Suction Port 11b Discharge Port 12 Secondary Side Return Pipe 13 Secondary Side Forward Pipe 14 Secondary Side Circulation Pump 14a Suction Port 14b Discharge Port 15 Exterior Body 17 Front Panel 19 Installation Plate 19a One side 19b Other side 20 Drain plug 21 Mounting auxiliary plate

Claims (4)

A hot water storage tank for storing hot water, a heater for heating the hot water in the hot water storage tank, a heat exchanger for heating external heated water using the hot water in the hot water storage tank as a heat source, and hot water in the hot water storage tank A non-self-priming primary circulation pump that guides the primary side of the heat exchanger, an exterior body that is open at the front and accommodates the hot water storage tank, a front panel that covers the open front surface of the exterior body, and the primary A hot water storage water heater having a built-in non-self-contained circulation pump provided with a mounting plate for attaching a side circulation pump to the exterior body, wherein the mounting plate is fixed to the front side inside the side surface of the exterior body, and the primary The side circulation pump has a suction port in front of the primary circulation pump, a discharge port in a direction orthogonal to the front surface, a drain plug provided at the tip of the discharge port, and the mounting plate and the side surface of said outer body through a Serial the corner space between the front panel and the hot water storage tank, a predetermined angle back of the faces the hot water storage tank, and forms the direction of the discharge port and the center side of the front panel of the primary side circulation pump A hot water storage type water heater with a built-in non-self-contained circulation pump, which is mounted in an obtuse angle . The mounting plate has a structure in which a flat plate is bent at a predetermined obtuse angle, one surface of the bent flat plate is fixed to the front side inside the side surface of the exterior body, and the other surface is positioned closer to the hot water storage tank. The primary-side circulation pump is attached to the front-side circulation pump so that a predetermined angle formed by the direction of the discharge port of the primary-side circulation pump and the center side of the front panel is an obtuse angle. A hot water storage type hot water supply apparatus incorporating the non-self-contained circulation pump according to claim 1. A non-self-contained secondary side circulation pump for circulating the heated water is provided on the secondary side of the heat exchanger, and the secondary side circulation pump has a suction port in front of the secondary side circulation pump. And having a discharge port in a direction perpendicular to the front, a drain plug provided at the tip of the discharge port, and being attached to the other surface of the mounting plate above or below the primary circulation pump. The non-self-contained circulation pump according to claim 2 , wherein a predetermined angle formed by the direction of the discharge port of the secondary-side circulation pump and the center side of the front panel is an obtuse angle. Hot water storage water heater with built-in.   The primary-side circulation pump and / or the secondary-side circulation pump includes a mounting auxiliary plate that is orthogonal to the suction port and extends in a substantially vertical direction, and the primary side is mounted on the other surface of the mounting plate by the mounting auxiliary plate. 4. The hot water storage type hot water heater having a built-in non-self-contained circulation pump according to claim 2, wherein the side circulation pump and / or the secondary circulation pump is cantilevered.

Images