JP2012197982A - Storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage type water heater capable of sealing a back gas in the welding of a hot water storage tank, and preventing a structure of the hot water storage tank from being complicated.SOLUTION: This storage type water heater includes the hot water storage tank 10 having an inflow port (upper connecting port 13) to which hot water or water flows in, a baffle 30 disposed inside of the hot water storage tank 10 for suppressing the force of hot water or water flowing from the inflow port, and a mounting member 20 having an insertion section inserted into the inflow port from the outside and mounted to the hot water storage tank 10, the baffle 30 has a hole 30A in a position opposed to the inflow port, and the insertion section has a closing section (guide 24C and tip closing section 24D) closing the hole 30A of the baffle 30 when the mounting member 20 is mounted to the hot water storage tank 10.

Description

  The present invention relates to a hot water storage type water heater.

  2. Description of the Related Art A hot water storage type hot water heater having a hot water storage tank for storing hot water generated by a heating means such as a heat pump is widely used. The hot water storage tank is always full, and hot water (hot water) is stored on the upper side and water before heating (low temperature water) is stored on the lower side due to the difference in specific gravity due to temperature. In order to efficiently use the hot water stored in the hot water storage tank, the hot water and water should not be disturbed as much as possible by disturbing the temperature boundary layer (temperature distribution) formed between the upper hot water and the lower hot water. It is important not to mix them.

  In the hot water storage water heater disclosed in Patent Document 1, a hot water supply pipe for supplying high temperature water from the upper part of the hot water storage tank to the outside of the hot water tank and a boil-up return pipe for returning the high temperature water heated by the heat pump unit to the upper part of the hot water storage tank. Are connected to the upper part of the hot water storage tank through separate connection ports. Moreover, the cylindrical baffle structure for reducing the flow velocity of the water which flows in from this piping is provided in the edge part of the water supply piping connected to the hot water storage tank lower part.

  Patent Document 2 discloses a technique related to a plate-like baffle structure provided in a hot water storage tank. Patent Document 3 discloses a technique for manufacturing a hot water storage tank by TIG welding that does not use a back gas seal made of argon gas or the like.

JP 2009-2613 A Japanese Patent Laid-Open No. 10-205884 JP 2007-302995 A

  In recent years, social needs for energy saving are further increasing, and in the hot water supply field, expectations for highly efficient hot water storage hot water heaters are increasing. However, the structure of current hot water storage hot water heaters is complicated due to various restrictions and an increase in additional functions, and it is difficult to provide an inexpensive hot water heater.

  As described above, in the water heater of Patent Document 1, the two pipes, the hot water supply pipe and the boil-up return pipe, are connected to the upper part of the hot water storage tank via separate connection ports. In general, it is desirable that the hot water supply pipe be connected to the upper part of the hot water storage tank in order to make effective use of the high temperature water stored in the hot water storage tank as much as possible. In addition, when hot water flows into the hot water storage tank from the boiling return pipe, the temperature boundary layer between the high temperature water and the low temperature water inside the hot water storage tank may be disturbed. In view of this point, it is necessary to provide a baffle for suppressing the momentum when high-temperature water flows in, inside the hot water storage tank of the boil-up return pipe connection portion. Thus, even if it takes the piping structure of the hot water storage tank upper part from various restrictions, it exists in the situation where a structure must be complicated.

  Moreover, in patent document 1, although the front-end | tip part obstruct | occluded and the cylindrical baffle structure body which formed the several through-hole in the side surface is proposed, since there is no flat baffle in the structure of patent document 1, It is difficult to reliably prevent the inflow of hot water from flowing into the hot water storage tank, and the temperature boundary layer in the hot water storage tank cannot be disturbed. In addition, when the baffle structure of Patent Document 1 is applied to the connection part of the boil-up return pipe, calcium components dissolved in high-temperature water precipitate and adhere to the through-holes during long-term use. However, the through hole tends to be narrow. For this reason, it can be said that the baffle structure of patent document 1 is not suitable for the connection part of boiling return piping. For this reason, it is desirable to provide a flat plate-like baffle that can surely suppress the momentum of the flowing hot water at the inlet of the hot water storage tank, particularly the inlet to which the boil-up return pipe is connected. .

  As shown in Patent Document 3, a hot water storage tank mainly has a welded structure made of a thin stainless steel plate. That is, the hot water storage tank generally has a structure in which the upper and lower ends of the cylindrical body portion are combined with end plates formed in bowl shapes and these are joined by TIG welding. As a method to improve the corrosion resistance of the welded part, when manufacturing a hot water storage tank by TIG welding, back gas seal that blows argon gas from the hot water tank inside to the heat input part at the same time as the heat input by the torch from the hot water tank outside There is known a method of suppressing oxidation of the back bead portion by performing the above. Patent Document 3 advocates TIG welding without performing back gas sealing by specifying the composition of ferritic stainless steel. However, in order to improve the corrosion resistance of the welded portion, back gas is also used. It is desirable to perform a seal.

  In order to perform back gas sealing during welding of a hot water storage tank, it is necessary to insert a nozzle for supplying back sealing gas such as argon gas from a through hole provided in the body or the end plate. Therefore, the processing cost increases accordingly, so that a method of guiding the back seal gas supply nozzle into the hot water storage tank using an existing hole such as a pipe connection port is desirable. However, when a plate-like baffle is installed inside the inflow port of the hot water storage tank, the baffle becomes an obstacle, and the back seal gas supply nozzle cannot be inserted from the inflow port. For this reason, in order to insert the back seal gas supply nozzle during welding of the hot water storage tank, use another through hole without a baffle, or use a dedicated hole for inserting the back seal gas supply nozzle. It is necessary to provide it. For this reason, there is a problem that manufacturing restrictions occur and the cost is increased due to the complicated structure.

  As described above, the conventional hot water storage type hot water heater has various structural and manufacturing restrictions on the hot water storage tank, so it is difficult to provide a hot water storage type hot water heater excellent in energy efficiency and durability at low cost. Is in the situation.

  The present invention has been made to solve the above-described problems, and can store back gas when welding a hot water storage tank, and can suppress the complexity of the structure of the hot water storage tank. An object is to provide a hot water heater.

  A hot water storage type water heater according to the present invention includes a hot water storage tank having an inflow port through which hot water or water flows, a baffle that is installed inside the hot water storage tank and suppresses the momentum of the hot water or water flowing in from the inflow port, and from the outside A baffle having a hole at a position facing the inflow port. The insertion portion has a blocking portion that closes the hole of the baffle when the mounting member is mounted on the hot water storage tank.

  According to the present invention, when the hot water storage tank is welded, the back seal gas supply nozzle can be inserted into the hot water storage tank through the inlet of the hot water tank and the hole formed in the baffle. It can be performed. For this reason, the corrosion resistance of a welding part can be improved. In addition, since the number of through holes provided in the hot water storage tank can be reduced, processing costs and the like can be suppressed, and manufacturing costs can be reduced.

It is a block diagram which shows the hot water storage type water heater of Embodiment 1 of this invention. It is a block diagram which shows the hot water storage type water heater of Embodiment 1 of this invention. It is an external appearance perspective view of the mounting member with which the hot water storage type water heater of Embodiment 1 of the present invention is provided. It is sectional drawing of the mounting member with which the hot water storage type water heater of Embodiment 1 of this invention is provided. It is an external appearance perspective view of the baffle before attaching to a hot water storage tank in the hot water storage type water heater of Embodiment 1 of the present invention. In the hot water storage type hot water supply apparatus of Embodiment 1 of this invention, it is sectional drawing of the state which attached the baffle inside the upper part of the hot water storage tank. FIG. 3 is a top view of the hot water storage tank in a state where the mounting member is mounted in the hot water storage type water heater according to the first embodiment of the present invention. It is AA sectional drawing in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating a hot water storage type water heater according to Embodiment 1 of the present invention. As shown in FIG. 1, the hot water storage type water heater of this embodiment includes a tank unit 1 having a hot water storage tank 10 and a heat pump unit 60. The tank unit 1 and the heat pump unit 60 are connected by a boiling forward pipe 5 and a boiling return pipe 6. The heat pump unit 60 is a heating unit that absorbs atmospheric heat into the refrigerant by a refrigeration cycle (heat pump cycle), which will be described later, and heats water supplied from the tank unit 1. The tank unit 1 is connected to a water supply pipe 2 for supplying water from a water source and a hot water supply pipe 3 for supplying hot water to the outside, in addition to the boiling forward pipe 5 and the boiling return pipe 6. Yes. In the illustrated configuration, one or more hot water taps 4 are provided at the tip of the hot water supply pipe 3.

  Next, with reference to FIG. 2, the structure of the hot water storage type water heater of this embodiment is further demonstrated. However, illustrations and descriptions of parts not related to the present invention are omitted or simplified. As shown in FIG. 2, the hot water storage tank 10 includes water supplied from the water supply pipe 2 (hereinafter also referred to as “low temperature water”) and hot water heated by the heat pump unit 60 (hereinafter referred to as “high temperature water”). Can also be stored. Water causes a specific gravity difference due to a temperature difference. In the hot water storage tank 10, low temperature water having a large specific gravity is stored on the lower side, and high temperature water having a low specific gravity is stored on the upper side. In addition to the hot water storage tank 10, various pipes, various valves, various sensors, a control device 50, and the like are installed inside the outer case included in the tank unit 1. When the hot water tap 4 is opened, the high temperature water stored in the hot water storage tank 10 is pushed out to the hot water supply pipe 3 side by the pressure of the water source acting from the water supply pipe 2, and the water supplied from the water source by the mixing valve (not shown) After being mixed and temperature-controlled, it is supplied to the hot water supply port 4A.

  The heat pump unit 60 has a refrigeration cycle in which a compressor 61, a heating heat exchanger 62, an expansion valve 63, and an air heat exchanger 64 are connected in a ring shape with a refrigerant circulation pipe 65. The boiling heat exchanger 62 heats the low-temperature water led from the tank unit 1 by the heat of the high-temperature refrigerant compressed by the compressor 61. A heat pump outlet temperature sensor 66 provided on the boiling return pipe 6 detects the temperature of the high-temperature water heated by the boiling heat exchanger 62. This refrigeration cycle preferably uses carbon dioxide as a refrigerant and is operated at a pressure exceeding the critical pressure. The control device 50 is a device for operating actuators such as various valves and pumps based on information such as values detected by various sensors provided in the hot water storage type hot water heater and preset operation conditions. It is an apparatus for enabling various controls of the hot water storage type hot water heater as required. In addition, the control apparatus 50, each actuator, and each sensor are connected by internal wiring 50A.

  The hot water storage tank 10 is provided with a plurality of connection ports for connecting pipes. A water supply pipe 2 and a heating forward pipe 5 are connected to a water supply connection port 11 and a heat pump forward connection port 12 provided in the lower part of the hot water storage tank 10, respectively. A hot water supply pipe 3 is connected to an upper connection port 13 provided in the upper part of the hot water storage tank 10 via a mounting member 20 described later. In the present embodiment, the end of the boiling return pipe 6 on the tank unit 1 side is connected to the hot water supply pipe 3. Further, in the present embodiment, the upper connection port 13 is disposed substantially at the center (top) of the upper part of the hot water storage tank 10.

  The pressure reducing valve 8 reduces the pressure applied from the water source into the hot water storage type hot water heater to a certain level. In order to prevent the pressure in the hot water storage water heater from rising due to the volume expansion that occurs when the low temperature water is heated by the boiling operation, the relief valve 9 passes the volume expansion hot water via the relief valve drain pipe 9A. It is a safety valve for adjusting the pressure in the hot water storage tank 10 so that the pressure in the hot water storage tank 10 is below a certain level. The hot water storage tank 10 is provided with a plurality of remaining hot water temperature sensors 19 at different heights. The temperature information detected by the remaining hot water temperature sensor 19 is processed by the control device 50 to grasp the amount of remaining hot water in the hot water storage tank 10 and to control the start / stop of the heating operation by the heat pump unit 60. used. The boiling circulation pump 7 is a pump for circulating hot water between the tank unit 1 and the heat pump unit 60, and is provided on the boiling forward piping 5.

  Next, the operation during the boiling operation will be described. When the control device 50 determines that the boiling operation is necessary, the operation of the boiling circulation pump 7 and the compressor 61 is started. Thereby, the low temperature water taken out from the heat pump outgoing side connection port 12 of the hot water storage tank 10 is sent to the heating heat exchanger 62 through the boiling outgoing pipe 5 and heated to become high temperature water. The heated high-temperature water returns to the tank unit 1 through the boiling return pipe 6 and flows into the hot water storage tank 10 from the upper connection port 13 through the hot water supply pipe 3 and the mounting member 20.

  As described above, in the present embodiment, the upper connection port 13 serves as an inflow port for allowing the high temperature water from the boil-up return pipe 6 to flow into the hot water storage tank 10 and the hot water in the hot water storage tank 10 as a hot water supply pipe. 3 is also used as an outlet to be discharged to 3. For this reason, in this embodiment, it is not necessary to separately provide a high-temperature water inlet and outlet at the top of the hot water storage tank 10, and the number of through holes can be reduced, thereby reducing manufacturing costs such as processing costs. can do.

  By the way, in order to effectively use the hot water in the hot water storage tank 10 without waste, it is important to prevent the upper hot water and the lower cold water from being mixed as much as possible. For that purpose, it is important not to disturb the temperature boundary layer between the upper high temperature water and the lower low temperature water as much as possible. In the hot water storage tank 10, a plate-like baffle 30 is installed inside the upper connection port 13, and a plate-like baffle 31 is installed inside the water supply connection port 11. During the boiling operation, the baffle 30 suppresses the momentum of the high-temperature water flowing from the upper connection port 13, so that it is possible to reliably prevent the temperature boundary layer in the hot water storage tank 10 from being disturbed. Further, when hot water is supplied, the baffle 31 suppresses the momentum of the low-temperature water flowing from the water supply connection port 11, so that the temperature boundary layer in the hot water storage tank 10 can be reliably prevented from being disturbed. For these reasons, in the present embodiment, it is possible to prevent the high temperature water and the low temperature water in the hot water storage tank 10 from being mixed as much as possible, and it is possible to effectively use the high temperature water without waste.

  Next, with reference to FIG. 3 and FIG. 4, the mounting member 20 with which the hot water storage type water heater of this embodiment is provided is demonstrated. FIG. 3 is an external perspective view of the mounting member 20. FIG. 4 is a cross-sectional view of the mounting member 20. The mounting member 20 shown in these drawings has a function as an elbow-shaped pipe joint having two connecting portions. One connecting portion of the mounting member 20 is a pipe connecting portion 22 for connecting to the hot water supply pipe 3, and the other connecting portion is a tank connecting portion 23 for connecting to the hot water storage tank 10. On the tank connection part 23 side, a nozzle part 24 that is inserted into the hot water storage tank 10 from the upper connection port 13 is provided. The pipe connection part 22 is a structure for connecting the hot water supply pipe 3 to the mounting member 20, and has a flange-shaped fixing part 22A and a concave part 22B. The end of the hot water supply pipe 3 is inserted into the recess 22B and connected to the mounting member 20 via the fixing portion 22A. The tank connection part 23 is a structure for attaching the attachment member 20 to the upper connection port 13 of the hot water storage tank 10, and has a flange-like fixing part 23A, a packing groove 23B, and an insertion guide part 23C. The mounting member 20 is connected to the hot water storage tank 10 through the fixing portion 23A by inserting the insertion guide portion 23C into the upper connection port 13. The packing groove 23B has a shape for fixing a packing 35 (see FIG. 8) to be attached to prevent water leakage. The outer diameter D1 (see FIG. 4) of the insertion guide portion 23C is equal to or slightly smaller than the inner diameter D2 (see FIG. 6) of the upper connection port 13.

  The nozzle portion 24 extends coaxially with the tank connection portion 23 and has a substantially cylindrical shape with a closed end portion. The nozzle portion 24 has a plurality of column portions 24A and openings 24B, a guide portion 24C, and a tip closing portion 24D. The plurality of openings 24 </ b> B penetrate the cylindrical side surface of the nozzle portion 24, and function as water inlets necessary for allowing hot water to enter and exit the hot water storage tank 10. The column portion 24A is a column left between the adjacent openings 24B and supports the guide portion 24C on the distal end side. The tip closing portion 24D is a disk-like component that is fixed so as to close the tip opening of the guide portion 24C.

  When the mounting member 20 of the present embodiment is manufactured by resin injection molding, it is necessary to mold the cylindrical shape of the flow path 21 and the nozzle portion 24 using a molding die that slides in the arrow α direction from below in FIG. . In the present embodiment, since the tip closing portion 24D is configured as a separate part, the mounting member 20 can be manufactured at low cost using resin molding.

  In the mounting member 20 of the present embodiment, the guide portion 24C and the tip closing portion 24D constitute a closing portion that closes a hole 30A of the baffle 30 described later. The outer diameter of the closed portion, that is, the outer diameter D3 (see FIG. 4) of the guide portion 24C is equal to or slightly smaller than the inner diameter D4 (see FIG. 5) of the hole 30A of the baffle 30. Further, in the mounting member 20 of the present embodiment, a portion from the fixing portion 23A to the tip of the nozzle portion 24 (guide portion 24C) constitutes an insertion portion that is inserted into the upper connection port 13. The length L1 (see FIG. 4) from the fixed portion 23A to the tip of the nozzle portion 24 is the length L2 from the upper end of the upper connection port 13 of the hot water storage tank 10 to the hole 30A of the baffle 30. (See FIG. 6).

  Next, with reference to FIG. 5 and FIG. 6, the baffle 30 with which the hot water storage type water heater of this embodiment is provided is demonstrated. FIG. 5 is an external perspective view of the baffle 30 before being attached to the hot water storage tank 10. The baffle 30 has a structure having a thin flat plate-like main body portion having a circular hole 30A formed at the center, and a plurality of support legs 30B and a support portion 30C for supporting the main body portion. The inner diameter D4 of the hole 30A of the baffle 30 is equal to or smaller than the inner diameter D2 of the upper connection port 13 (see FIG. 6).

  FIG. 6 is a cross-sectional view of the state in which the baffle 30 is attached to the inside of the upper part of the hot water storage tank 10. The baffle 30 is attached to the inner surface of the upper part of the hot water storage tank 10 through a support leg 30B and a support portion 30C by a method such as spot welding. Further, the baffle 30 is arranged so that the hole 30A and the upper connection port 13 face each other on the same axis. The hole 30 </ b> A of the baffle 30 is a burring hole that protrudes toward the back side (downward) of the hot water storage tank 10. Accordingly, when the mounting member 20 is mounted on the hot water storage tank 10, the guide portion 24C can be smoothly inserted into the hole 30A.

  The hot water storage tank 10 of the present embodiment has a structure in which end plates formed in a bowl shape are combined with upper and lower ends of a cylindrical body portion and these are joined by welding over the entire circumference. At the time of this welding, for example, a back seal gas supply nozzle (not shown) for supplying a back seal gas such as argon gas is passed through the upper connection port 13 of the hot water storage tank 10 and the hole 30A of the baffle 30. Can be inserted inside. And simultaneously with the heat input by the torch from the outside of the hot water storage tank 10, the back seal gas is blown from the back seal gas supply nozzle to the back side of the heat input portion, and welding is performed. According to the hot water storage tank 10 of the present embodiment manufactured as described above, since the oxidation of the back bead portion of the welded portion can be reliably suppressed, the corrosion resistance of the welded portion can be reliably improved. Further, by providing the baffle 30 with the hole 30 </ b> A so that the back seal gas supply nozzle can be inserted from the upper connection port 13, it is not necessary to provide a through-hole other than the upper connection port 13 in the upper part of the hot water storage tank 10. For this reason, manufacturing costs such as processing costs can be reduced.

  After the welding of the hot water storage tank 10 is completed as described above, the mounting member 20 is mounted to the upper connection port 13 of the hot water storage tank 10. FIG. 7 is a top view of the hot water storage tank 10 with the mounting member 20 mounted thereon. 8 is a cross-sectional view taken along the line AA in FIG. As shown in FIG. 8, the end of the hot water supply pipe 3 is inserted into the recess 22B of the mounting member 20, and is connected and fixed to the mounting member 20 using the fixing portion 22A. When attaching the mounting member 20 to the hot water storage tank 10, first, the guide portion 24 </ b> C of the mounting member 20 is inserted into the upper connection port 13 from above the hot water storage tank 10. Here, since the outer diameter D3 of the guide portion 24C is smaller than the inner diameter D2 of the upper connection port 13, the guide portion 24C can penetrate the upper connection port 13. When the mounting member 20 is further pushed in, the insertion guide portion 23C is inserted along the inner surface of the upper connection port 13, and the guide portion 24C and the tip closing portion 24D reach the position of the baffle 30.

  When the mounting member 20 is further pushed in until the fixing portion 23A contacts the upper connection port 13, the outer diameter D3 of the guide portion 24C is equal to or slightly smaller than the inner diameter D4 of the hole 30A of the baffle 30. 24C is inserted along the inner surface of the hole 30A of the baffle 30. As described above, in the state where the mounting member 20 is mounted, the inner peripheral surface of the hole 30A of the baffle 30 and the outer peripheral surface of the guide portion 24C come close to each other without contact or almost no gap. That is, the hole 30A of the baffle 30 is closed with almost no gap by the guide portion 24C and the tip closing portion 24D.

  The mounting member 20 is fixed to the upper connection port 13 by using the fixing portion 23A. Although not shown in FIGS. 7 and 8, it is general to use means such as a quick fastener to fix each connection portion between the mounting member 20, the upper connection port 13, and the hot water supply pipe 3. In addition, one or two packings 35 are attached to each connection portion in order to prevent water leakage.

  The high-temperature water flowing into the hot water storage tank 10 during the boiling operation follows the path indicated by the arrow β in FIG. That is, hot water flowing into the hot water storage tank 10 is guided from the boiling return pipe 6 to the mounting member 20 through the hot water supply pipe 3, passes through the flow path 21 in the mounting member 20, passes through the opening 24B, It flows between the inner wall of the hot water storage tank 10 and the baffle 30. At this time, since the hole 30A of the baffle 30 is closed by the guide portion 24C and the tip closing portion 24D, the momentum of the high-temperature water that flows in is reliably prevented from reaching the back of the baffle 30. The high temperature water flowing between the inner wall of the hot water storage tank 10 and the baffle 30 is changed in the horizontal direction by the baffle 30, so that the momentum is reliably suppressed. For this reason, high temperature water can be made to flow in the hot water storage tank 10 without disturbing the temperature boundary layer in the hot water storage tank 10.

  In the present embodiment, the relationship between the inner diameter D2 of the upper connection port 13, the outer diameter D3 of the guide portion 24C, and the inner diameter D4 of the hole 30A of the baffle 30 is D2 ≧ D4 ≧ D3. In order to reliably prevent the temperature boundary layer from being disturbed, it is desirable that the outer peripheral surface of the guide portion 24C and the inner peripheral surface of the hole 30A of the baffle 30 be as close as possible to each other, so that the guide portion 24C It is desirable that the outer diameter D3 and the inner diameter D4 of the hole 30A of the baffle 30 be as large as possible.

  In order to allow the guide portion 24C to pass through the upper connection port 13, the outer diameter D3 of the guide portion 24C needs to be smaller than the inner diameter D2 of the upper connection port 13. Therefore, if the inner diameter D4 of the hole 30A of the baffle 30 is larger than the inner diameter D2 of the upper connection port 13, there is a gap between the outer peripheral surface of the guide portion 24C and the inner peripheral surface of the hole 30A of the baffle 30. It becomes empty. On the other hand, in this embodiment, by setting the inner diameter D4 of the hole 30A of the baffle 30 to be equal to or smaller than the inner diameter D2 of the upper connection port 13, the outer peripheral surface of the guide portion 24C and the inner peripheral surface of the hole 30A of the baffle 30 are as much as possible. It is possible to realize a close state without a gap.

  According to the present embodiment described above, the upper connection port 13 to which the mounting member 20 is mounted can be used both as an inflow port and an outflow port for high-temperature water. Can be the upper connection port 13 only. For this reason, a processing cost etc. can be suppressed. Further, by forming a hole 30A in the baffle 30 installed inside the upper connection port 13 of the hot water storage tank 10, a back seal gas supply nozzle is inserted from the upper connection port 13 when the hot water storage tank 10 is welded. Sealing can be performed. For this reason, the oxidation of the back bead portion can be suppressed and the corrosion resistance of the welded portion can be enhanced. Since the hole 30A of the baffle 30 is closed by mounting the mounting member 20, the momentum of the high-temperature water flowing from the upper connection port 13 during the boiling operation does not reach the back of the baffle 30, and the hot water storage tank 10 It is possible to reliably prevent the inner temperature boundary layer from being disturbed. For this reason, it is possible to manufacture a hot water storage hot water heater having excellent durability and high energy efficiency at a low cost.

  In the above-described embodiment, the case where the present invention is applied to the high temperature water inlet (upper connection port 13) has been described. However, the present invention is similarly applied to the low temperature water inlet (water supply connection port 11). Is possible.

DESCRIPTION OF SYMBOLS 1 Tank unit 2 Water supply piping 3 Hot-water supply piping 4 Hot-water supply tap 4A Hot-water supply port 5 Boiling forward piping 6 Boiling return piping 7 Boiling circulation pump 8 Pressure reducing valve 9 Relief valve 10 Hot water storage tank 11 Water supply connection port 12 Heat pump connection port 13 Upper connection port 19 Remaining hot water temperature sensor 20 Mounting member 21 Flow path 22 Pipe connection portion 22A Fixing portion 22B Recess 23 Tank connection portion 23A Fixing portion 23B Packing groove 23C Insertion guide portion 24 Nozzle portion 24A Column portion 24B Opening portion 24C Guide portion 24D Tip closing part 30 Baffle 30A Hole 30B Support leg 30C Support part 31 Baffle 35 Packing 60 Heat pump unit 61 Compressor 62 Heating heat exchanger 63 Expansion valve 64 Air heat exchanger 65 Refrigerant circulation pipe 66 Heat pump outlet temperature sensor

Claims (8)

A hot water storage tank having an inlet for hot water or water to flow in;
A baffle that is installed inside the hot water storage tank and suppresses the momentum of hot water or water flowing in from the inlet,
An insertion member that is inserted into the inflow port from the outside, includes a flow path of hot water or water inside, and a mounting member that is mounted on the hot water storage tank;
With
The baffle has a hole at a position facing the inlet,
The insertion portion is a hot water storage type hot water heater having a closing portion that closes the hole of the baffle when the mounting member is mounted on the hot water storage tank.   2. The hot water storage type hot water heater according to claim 1, wherein the inner peripheral surface of the hole of the baffle and the outer peripheral surface of the blocking portion are in contact with or close to each other when the mounting member is mounted on the hot water storage tank.   The hot water storage type hot water heater according to claim 1 or 2, wherein an inner diameter of the hole of the baffle is equal to or smaller than an inner diameter of the inlet.   A back seal gas supply nozzle for welding can be inserted into the hot water storage tank through the inflow port and the hole of the baffle when the mounting member is not mounted in the hot water storage tank. The hot water storage type water heater according to any one of claims 1 to 3.   The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, wherein the inflow port is also used as an outflow port through which hot water or water flows out from the hot water storage tank.   The hot water storage type hot water heater according to any one of claims 1 to 5, wherein the inflow port allows hot water generated by a heating means or water supplied from a water supply source to flow into the hot water storage tank. The insertion part has a substantially cylindrical nozzle part with a closed end part,
The closed tip of the nozzle portion constitutes the closing portion,
The hot water storage type hot water supply device according to any one of claims 1 to 6, wherein an opening for passing hot water or water is formed on a cylindrical side surface of the nozzle portion.   The hot water storage type hot water supply apparatus according to any one of claims 1 to 7, wherein the mounting member is manufactured by combining a plurality of parts so as to be manufactured by molding.

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