JP5045488B2 - Hot water storage water heater, assembling method of hot water storage water heater - Google Patents

Description

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

  Conventional hot water storage type hot water heaters are connected by interposing a synthetic resin pipe having electrical insulation and flexibility when connecting water supply pipes and hot water supply pipes to electric water heaters (hot water storage type hot water heaters). It is. (For example, see Patent Document 1) This is a measure to prevent leakage of electricity from a hot water storage hot water heater to a faucet or the like in the house through a pipe in the event of a short circuit leakage. It is recommended to install a pipe with electrical insulation in the water supply and hot water supply piping. (See Non-Patent Document 1)

JP-A-10-141777 (first page, FIG. 1) "Extension regulation" by the Japan Electric Association demand equipment special committee (Part 3, Chapter 5, Special facility 3545-5 Security work 3 [Insulated pipe])

  The conventional hot water storage hot water heater as described above is electrically insulated in the middle of the piping route so that the user does not get an electric shock through the piping route connected to the hot water storage hot water heater even if a leakage occurs due to a failure or the like. It has been recommended to electrically insulate through the use of a flexible pipe. Therefore, in the installation work, it is necessary to prepare a synthetic resin pipe having electrical insulation in addition to the hot water storage type water heater in advance, which is troublesome and expensive. In recent years, the necessary piping members and valves have been built-in, and at the installation site, only a connection to a water supply source and a connection to a hot water supply terminal is required. It is becoming common.

  In addition, the contractor who installs the hot water storage hot water supply system and the contractor who constructs the water supply hot water supply pipes on the house side are separate companies, and the construction period is often separate, and piping from the water supply source and piping to the hot water supply terminal Are often laid in advance in the vicinity of the place where the hot water storage hot water heater is installed. In this case, it is not possible to lay the pipe having electrical insulation in the middle, and it is necessary to secure a physical space for newly laying the pipe having electrical insulation during the installation work, which is very troublesome for the contractor. It was such a thing. In addition, in order to secure physical space, in addition to installation work, such as when connecting parts with hot water storage hot water heaters or partially processing pipes from pre-laid water supply sources or pipes to hot water supply terminals, There was a problem that a restoration work such as a sealing member and a sealing work was required. In this way, it is very important to electrically insulate the hot water storage water heater and the piping path connected to the hot water storage water heater in order to ensure the safety of the user against electric leakage. There was trouble and trouble with the above.

  The present invention was made in order to solve the above-described problems, and is a hot water storage type hot water heater that can ensure safety against electric leakage and reduce troubles in arranging separate parts during construction and problems in construction. The purpose is to provide.

  A hot water storage type hot water heater according to the present invention includes a housing containing a hot water storage tank, a water supply pipe connected to a water supply source outside the housing and a hot water storage tank, and a tank water supply pipe built in the housing. Connect the tank water supply pipe and the water supply pipe, and connect the water supply joint attached to the housing to the hot water supply pipe connected to the user terminal outside the housing and using the hot water in the hot water storage tank. The tank outlet pipe built in the casing, the tank outlet piping and the hot water supply pipe connected to the casing, the water supply joint attached to the casing, and between the water supply joint and the casing and between the hot water joint and the casing, A first spacer made of an insulating material, and the first spacer electrically insulates between the water supply joint and the housing and between the hot water supply joint and the housing.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the hot water storage type hot water supply machine which can ensure the safety | security with respect to an electrical leakage, and can reduce the effort of arrangement of another member at the time of construction, the trouble on construction, etc.

Embodiment 1 FIG.
FIG. 1 is a block diagram of a hot water storage type hot water heater according to an embodiment of the present invention, and FIGS. In FIG. 1, a hot water storage type water heater 50 includes a hot water storage tank unit 20 and a heat pump unit 30.

  The hot water storage tank unit 20 includes a hot water storage tank 1, and a tank water supply pipe 6 is connected to the lower part of the hot water storage tank 1. Between this tank water supply pipe 6 and the water supply joint 5 attached to the bottom surface of the housing 2 of the hot water storage tank unit 20, a tank water supply insulation pipe 6a made of a material having electrical insulation is connected. Yes. Further, a tank hot water discharge pipe 7 is connected to the upper part of the hot water storage tank 1, and between the tank hot water discharge pipe 7 and the hot water supply joint 8 attached to the bottom surface of the housing 2 of the hot water storage tank unit 20, A tank hot water insulating pipe 7a made of a material having electrical insulation is connected. In general, water supply joints such as the water supply joint 5 and the hot water supply joint 8 are often configured using a metal material such as bronze or brass.

  During the installation work of the hot water storage type hot water heater 50, the water supply joint 5 is connected to the water supply pipe 3 connected to the water supply source, so that the water supply joint 5, the tank water supply insulating pipe 6 a, Water is supplied from the water supply source to the lower part of the hot water storage tank 1 via the tank water supply pipe 6. In addition, the hot water supply joint 8 is connected to the hot water supply pipe 4 connected to the mixing faucet 18 which is a use side terminal that uses the hot water in the hot water storage tank 1 when the hot water storage type hot water heater 50 is installed. As a result, the water supplied from the water supply source to the hot water storage tank 1 is pushed out to the mixing tap 18 through the tank hot water supply pipe 7, the tank hot water insulating pipe 7 a, the hot water supply joint 8, and the hot water supply pipe 4. Hot water is supplied. The tank water supply insulation pipe 6a and the tank outlet insulation pipe 7a are long enough to prevent leakage to the outside due to the electrical resistance of the hot water in the event that current flows through the hot water flowing inside. (Here, 50 cm as an example).

  In the hot water storage type water heater 50, the water in the hot water storage tank 1 is heated and heated up, so that the water is taken out from the lower part of the hot water storage tank 1 and led to the heat pump unit 30, and a heat exchanger (not shown) in the heat pump unit 30 is shown. ) To the upper part of the hot water storage tank 1 is provided. The heating circulation circuit 9 includes a hot water storage tank unit side connection portion 9a provided on the bottom surface of the housing 2 and a heat pump unit side connection portion 9b provided on the heat pump unit 30 side. The heating circulation circuit 9 is configured by connecting this part in installation work or the like. The heat pump unit 30 includes a circulation pump (not shown) for circulating the water in the heating circulation circuit 9. The heat pump unit 30 absorbs heat from the atmosphere by a heat pump cycle, heats the absorbed heat from the hot water storage tank 1 to water guided by the heating circuit 9 and heats it by a heat exchanger (not shown) in the heat pump unit. .

  A temperature sensor 1 a that detects the temperature of the hot water in the hot water storage tank 1 is provided on the lower surface of the hot water storage tank 1. The control device 10 incorporated in the hot water storage tank unit 20 includes a determination unit 10a and a storage unit 10b, and supplies electric power supplied from the power source 15 such as midnight power to each necessary part of the hot water storage tank unit 20 and the heat pump unit 30. At the same time, based on the temperature in the hot water storage tank 1 detected by the temperature sensor 1a, the heat pump unit 30 is controlled to boil the water in the hot water storage tank 1, and the entire operation of the hot water storage type water heater 50 is controlled. .

  In addition, a housing (not shown) is provided with a mixing faucet 18 that is a user terminal that uses hot water in the hot water storage tank 1, and the mixing faucet 18 is branched from the water supply pipe 3 to supply water. The supplied water supply branch pipe 3a and the hot water supply pipe 4 are connected, and the water supplied from the water supply branch pipe 3a and the hot water supplied from the hot water supply pipe 4 are mixed at any desired temperature of the user and used for hot water supply. .

  FIG. 2 is an enlarged cross-sectional view of the main part of the hot water storage tank unit 20 in the vicinity of the water supply joint 5, and FIG. 3 is an enlarged cross-sectional view of the main part in which the part b (part surrounded by a circle) in FIG. .

In FIG. 2, the water supply joint 5 is attached to the housing 2 with a first spacer 11 made of a material having electrical insulation interposed. The attachment screw 13 fixes the water supply joint 5 to the housing 2 with the second spacer 12 made of a material having electrical insulation interposed between the attachment screw 13 and the water supply joint 5. Therefore, the water supply joint 5 is fixed to the housing 2 in a state of being electrically insulated from the housing 2 by the first spacer 11 and the second spacer 12. The first spacer 11 is formed in a substantially vertical direction along the side surface of the water supply joint 5, and is provided with a joint protection rib portion 11 a that protects the first spacer 11 from scattering of rainwater and the second spacer 12. Are formed in a substantially vertical direction along the side surface of the mounting screw 13 and are formed with fixing means protection rib portions 12a for protecting the mounting screw 13 from scattering of rainwater or the like.

  Further, the water supply joint 5 and the tank water supply insulation pipe 6a are configured such that the connection portion of the water supply joint 5 to the tank water supply insulation pipe 6a is formed in a male screw shape, and the corresponding tank water supply insulation pipe 6a side is formed in a female screw shape. It is connected by the screw structure. About the water supply joint 5 and the water supply pipe 3, the connection part with the water supply pipe 3 of the water supply joint 5 is comprised in the shape of a male screw, and the edge part by the side of the water supply pipe 3 corresponding to this is comprised in the shape of a female screw. It is configured to connect during installation work. Therefore, in the installation work for connecting the water supply pipe 3, the water supply joint 5 fixed to the housing 2 and the housing 2 of the hot water storage tank unit 20 are subjected to external forces such as tension or bending due to construction and stress from the attached water supply pipe 3. Will occur.

  In FIG. 3, the first spacer 11 and the joint protection rib portion 11 a and the second spacer 12 and the fixing means protection rib portion 12 a are not in contact with each other when the water supply joint 5 is fixed to the housing 2. It is configured to have a clearance.

  FIG. 4 is an enlarged cross-sectional view of the main part of the hot water storage tank unit 20 in the vicinity of the hot water supply joint 8, and FIG. 5 is an enlarged cross-sectional view of the main part in which the part c (part surrounded by a circle) in FIG. .

  In FIG. 4, the hot water supply joint 8 is attached to the housing 2 with a first spacer 11 made of a material having electrical insulation interposed. The mounting screw 13 fixes the hot water supply joint 8 to the housing 2 with the second spacer 12 made of a material having electrical insulation interposed between the mounting screw 13 and the hot water supply joint 8. Therefore, the hot water supply joint 8 is fixed to the housing 2 in a state where it is electrically insulated from the housing 2 by the first spacer 11 and the second spacer 12. The first spacer 11 is formed in a substantially vertical direction along the side surface of the hot water supply joint 8, and the joint spacer rib 11 a and the second spacer 12 protect the first spacer 11 from scattering of rainwater and the like. Are formed in a substantially vertical direction along the side surface of the mounting screw 13 and are formed with fixing means protection rib portions 12a for protecting the mounting screw 13 from scattering of rainwater or the like.

  Further, the hot water supply joint 8 and the tank hot water insulating pipe 7a are configured so that the connecting portion of the hot water supply joint 8 to the tank hot water insulating pipe 7a is formed in a male screw shape, and the corresponding tank hot water insulating pipe 7a side is formed in a female screw shape. It is connected by the screw structure. With respect to the hot water supply joint 8 and the hot water supply pipe 4, the connecting portion of the hot water supply joint 8 to the hot water supply pipe 4 is configured in a male screw shape, and the corresponding end portion on the hot water supply pipe 4 side is configured in a female screw shape. It is configured to connect during installation work. Accordingly, the installation of connecting the hot water supply pipe 4 has an external force such as tension or bending due to the construction or stress from the attached hot water supply pipe 4 on the hot water supply joint 8 fixed to the case 2 and the case 2 of the hot water storage tank unit 20. Will occur.

  Further, in FIG. 5, the first spacer 11 and the joint protection rib portion 11 a and the second spacer 12 and the fixing means protection rib portion 12 a are not in contact with each other in a state where the hot water supply joint 8 is fixed to the housing 2. It is configured to have a clearance.

  In addition, it is connected to the water supply piping 3 and the water supply piping 3 connected to the water supply joint 5 that it is necessary to insulate both between the water supply joint 5 and the housing | casing 2 and between the hot water supply joint 8 and the housing | casing 2 as mentioned above. This is because both the water supply branch pipe 3a and the hot water supply pipe 4 connected to the hot water supply joint 8 are connected to a mixed faucet 18 in the house that is used by being touched by the user.

  Next, the operation of the hot water storage type water heater in the present embodiment will be described. First, water supplied from a water supply source via the water supply pipe 3 is reduced to a predetermined pressure by a pressure reducing valve (not shown) in the hot water storage tank unit 20 and supplied to the hot water storage tank 1. Here, the hot water storage tank 1 is always full. The operation of boiling water in the hot water storage tank 1 is performed mainly in the late-night power hours (generally from 23:00 to 7:00 the next morning), and the controller 10 instructs the heat pump unit 30 to start boiling. The boiling operation is started. When the heat pump unit 30 receives an instruction to start boiling, it starts to absorb heat from the atmosphere by the heat pump cycle and operates a built-in circulation pump (not shown) to take out water from the lower part of the hot water storage tank 1 by the heating circulation circuit 9. Then, it is guided into the heat pump unit 30. Subsequently, water from the hot water storage tank 1 is heated by heat absorbed from the atmosphere by a heat exchanger (not shown) in the heat pump unit 30 to be boiled to a predetermined temperature (for example, 90 ° C.), and hot water is stored by the heating circulation circuit 9. Return to the top of tank 1. (Performs water circulation in the hot water storage tank 1 in the direction of arrow a in FIG. 1)

  Thus, the operation in which the water in the hot water storage tank 1 is taken out from the lower part of the hot water storage tank 1 by the heating circuit 9 and heated and heated by the heat pump unit 30 and returned to the upper part of the hot water storage tank 1 is continued. Thus, the hot water is stored as hot water gradually boiled from the upper part to the lower part of the hot water storage tank 1. Here, the control device 10 uses the determination unit 10a to compare and determine a predetermined temperature (for example, 90 ° C.) stored in advance in the storage unit 10b and the temperature of the hot water in the hot water storage tank 1 detected by the temperature sensor 1a. When the predetermined temperature stored in the storage unit 10b is reached, it is determined that all of the hot water storage tank 1 has been boiled, and the heat pump unit 30 is instructed to stop boiling. The heat pump unit 30 that has received the instruction to stop boiling stops the heat pump cycle and stops the circulation pump (not shown), and the boiling of the hot water storage tank 1 is completed.

  When the user opens the mixing tap 18, the water supplied from the water supply branch pipe 3 a and the hot water supplied via the hot water supply pipe 4 can be mixed by the mixing tap 18 and discharged. No hot water can be discharged.

At this time, for example, due to a failure of the hot water storage type hot water heater 50 or the like, the leakage from the control device 10 to the housing 2, the tank water supply pipe 6, the tank hot water supply pipe 7 and the hot water storage tank 1 from the temperature sensor 1 a via the hot water storage tank 1. Even in the case where leakage to the hot water in the housing 2 or leakage of heat to the housing 2 via the heating circuit 9 due to leakage of the heat pump unit 30 occurs, According to the embodiment, since the water supply joint 5 and the hot water supply joint 8 are electrically insulated from the housing 2, leakage from the housing 2 to the water supply pipe 3 and the hot water supply pipe 4 can be prevented. In addition, even if the tank water supply insulation pipe 6a and the tank discharge hot water insulation pipe 7a connected to the hot water storage tank 1 are made of insulating members, and each of the lengths uses hot water contained in the conductor as a conductor, electrical insulation performance is ensured. Since the length is configured, it is possible to prevent electric leakage to the water supply pipe 3 and the hot water supply pipe 4 using water as a conductor. Therefore, even when the water supply pipe 3, the water supply branch pipe 3a, and the hot water supply pipe 4 are made of an electrically conductive material such as a metal pipe, the water supply pipe 3, the water supply branch pipe 3a, and the hot water supply pipe 4 are used. Even if the user touches and operates the mixed faucet 18 in the house connected to the water supply pipe 3, the water supply branch pipe 3 a, or the hot water supply pipe 4, there is no electric leakage. Therefore, it is possible to prevent problems due to electric leakage to the user.

  In addition, when the hot water storage tank unit 20 is installed outdoors, rainwater is splashed in the vicinity of the water supply joint 5 and the hot water supply joint 8 attached to the bottom surface of the hot water storage tank unit 20 due to rebounding rain or direct scattering to the ground. However, it is possible to prevent rainwater from being directly applied to the water supply joint 5, the hot water supply joint 8, and the mounting screw 13 by the joint protection rib portion 11a and the fixing means protection rib portion 12a, and the first spacer 11 and the joint protection rib portion 11a. The second spacer 12 and the fixing means protective rib 12a are not in contact with each other and have a predetermined clearance, so that rainwater does not remain between the spacers due to surface tension. To fall to the ground directly from each spacer or from the joint protection rib portion 11a or the fixing means protection rib portion 12a formed in a substantially vertical direction. Ri, insulation performance of the first spacer 11 and second spacer 12 by deposition of rain water is not lowered.

  As described above, according to the present embodiment, a conventional synthetic resin pipe having electrical insulation and flexibility is not required for installation work as a separate member. There is no cost. Even if the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4 are made of an electrically conductive material such as a metal pipe, the water supply pipe 3 is leaked due to the leakage of the hot water storage hot water supply system 50. The user touches the water supply pipe 3, the water supply branch pipe 3 a, the mixed tap 18 in the house connected to the hot water supply pipe 4, etc. without causing leakage to the water supply branch pipe 3 a and the hot water supply pipe 4. Even if it does, a user does not get an electric shock and it becomes possible to provide a safe hot water storage type water heater.

Embodiment 2. FIG.
The configuration and effect of a hot water storage type hot water heater according to another embodiment of the present invention will be described. FIG. 6 is an enlarged cross-sectional view of the main part of the hot water storage hot water heater according to the second embodiment of the present invention, and FIG. FIG. 6 and 7, the same or corresponding parts as those in FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted.

  FIG. 6 is an enlarged cross-sectional view of a main part in the vicinity of the water supply joint 5 of the hot water storage tank unit 20. In FIG. 6, the water supply joint 5 is attached to the housing 2 with a first spacer 11 made of a material having electrical insulation interposed. Further, the joint insulating rib portion 11b formed in the first spacer 11 is formed in the water supply joint 5 and the housing 2 from the outside of the housing 2 to the inside through the hole that is opened in the housing 2 and through which the water supply joint 5 passes. It is extended so that it may be located between.

  FIG. 7 is an enlarged cross-sectional view of a main part in the vicinity of the hot water supply joint 8 of the hot water storage tank unit 20. In FIG. 7, the hot water supply joint 8 is attached to the housing 2 with a first spacer 11 made of a material having electrical insulation interposed. Further, the joint insulating rib portion 11 b extends from the outside of the housing 2 to the inside through the hole that is opened in the housing 2 and through which the hot water joint 8 passes, so as to be positioned between the hot water joint 8 and the housing 2. Has been.

  Next, the effect in this Embodiment is demonstrated. The water supply joint 5 and the water supply pipe 3 are configured so that the contractor connects in the installation work. Therefore, in the installation work for connecting the water supply pipe 3, the water supply joint 5 fixed to the housing 2 and the housing 2 of the hot water storage tank unit 20 are subjected to external forces such as tension or bending due to construction and stress from the attached water supply pipe 3. Will occur. At this time, the water supply joint 5 fixed to the housing 2 receives an external force, the mounting screw 13 is loosened, or the fixing portion between the housing 2 and the mounting screw 13 is deformed. It is conceivable that the position shifts. However, even if the water supply joint 5 is displaced and is likely to come into contact with the housing 2, the joint insulating rib portion 11 b is always interposed, so that the electrical insulation between the water supply joint 5 and the housing 2 is ensured. Can be secured.

  Further, the hot water supply joint 8 and the hot water supply pipe 4 are configured so that the contractor connects in the installation work. Accordingly, the installation of connecting the hot water supply pipe 4 has an external force such as tension or bending due to the construction or stress from the attached hot water supply pipe 4 on the hot water supply joint 8 fixed to the case 2 and the case 2 of the hot water storage tank unit 20. Will occur. At this time, the hot water supply joint 8 fixed to the housing 2 is subjected to an external force, so that the mounting screw 13 is loosened, or the fixing portion between the housing 2 and the mounting screw 13 is deformed. It is conceivable that the position shifts. However, even if the hot water supply joint 8 is displaced and is likely to come into contact with the housing 2, the joint insulating rib portion 11 b is always present, so that the electrical insulation between the hot water supply joint 8 and the housing 2 is ensured. Can be secured.

Embodiment 3 FIG.
In the above-described second embodiment, the water supply joint 5, the hot water supply joint 8, and the housing 2 are caused by the displacement of the water supply joint 5 and the hot water supply joint 8 caused by the external force applied to the water supply joint 5 and the hot water supply joint 8 during the installation work. In order to avoid a decrease in electrical insulation performance due to contact, the case where the joint insulating rib portion 11b is provided in the first spacer 11 has been shown. Separately, for the water supply joint 5, the tank water supply insulation pipe 6a is provided. A method of extending the outside of the housing 2 and a method of extending the tank hot water insulating pipe 7 a to the outside of the housing 2 may be used for the hot water supply joint 8. Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

  FIG. 8 is an enlarged cross-sectional view of a main part near the water supply joint 5 of the hot water storage hot water heater according to Embodiment 3 of the present invention, and FIG. 9 shows the vicinity of the hot water supply joint 8 of the hot water storage hot water supply according to Embodiment 3 of the present invention. FIG. 8 and 9, the same or corresponding parts as those in FIGS. 1 to 7 are denoted by the same reference numerals and description thereof is omitted.

  FIG. 8 is an enlarged cross-sectional view of a main part in the vicinity of the water supply joint 5 of the hot water storage tank unit 20. In FIG. 8, the water supply joint 5 is attached to the housing | casing 2 in the state which interposed the 1st spacer 11 comprised with the material which has electrical insulation. Further, the tank water supply insulating pipe 6 a is configured in a state in which the tip connected to the water supply joint 5 protrudes to the outside of the housing 2. (Refer to part d in FIG. 8)

  FIG. 9 is an enlarged cross-sectional view of a main part in the vicinity of the hot water supply joint 8 of the hot water storage tank unit 20. In FIG. 9, the hot water supply joint 8 is attached to the housing 2 with a first spacer 11 made of a material having electrical insulation interposed. The tank hot water insulating pipe 7 a is configured in a state in which the tip connected to the hot water supply joint 8 protrudes to the outside from the housing 2. (Refer to part e in Fig. 9)

  8 and 9, the tank feed water insulating pipe 6a and the tank hot water insulating pipe 7a have the same effect as the joint insulating rib portion 11b according to the second embodiment. That is, in FIG. 8, the portion of the tank water supply insulation pipe 6 a protruding to the outside of the housing 2 is likely to contact the housing 2 and the water supply joint 5 because the water supply joint 5 receives an external force during installation work and is displaced. Even if it becomes, since the part which protruded to the exterior of the housing | casing 2 of the tank water supply insulation piping 6a will always intervene, it is possible to ensure the electrical insulation of the water supply joint 5 and the housing | casing 2 reliably. Become. Further, in FIG. 9, the portion of the tank hot water insulating pipe 7 a protruding to the outside of the housing 2 causes the hot water supply joint 8 to be displaced due to external force during installation work, and the housing 2 and the hot water supply joint 8 are likely to contact each other. Even if it becomes, since the part which protruded to the exterior of the housing | casing 2 of the tank hot-water-insulation piping 7a will always intervene, it is possible to ensure the electrical insulation of the hot water supply joint 8 and the housing | casing 2 reliably. Become.

Embodiment 4 FIG.
A method for assembling a hot water storage type hot water heater according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a flowchart showing an assembling method of the hot water storage type hot water heater according to Embodiment 4 of the present invention.

  10, the hot water storage water heater assembly method includes an insulating joint mounting step (step S60) in which the water supply joint 5 and the hot water supply joint 8 are attached to the bottom surface of the housing 2 of the hot water storage tank unit 20, and the hot water storage tank 1 in the housing 2. Tank assembly step (step S61) for attaching the tank water supply pipe 6, the tank water supply insulation pipe 6a, the tank hot water supply pipe 7 and the tank hot water insulation pipe 7a, and the pipe connection for attaching the water supply pipe 3 and the hot water supply pipe 4 to the water supply joint 5 and the hot water supply joint 8. The process is divided into three steps (step S62).

  In the insulation joint mounting step S60, the water supply joint 5 is fixed to the housing 2 with the mounting screws 13 while being electrically insulated from the housing 2 by the first spacer 11 and the second spacer 12. Further, the hot water supply joint 8 is fixed to the housing 2 with the mounting screws 13 while being electrically insulated from the housing 2 by the first spacer 11 and the second spacer 12. (See Figure 4)

  As shown in FIGS. 3 and 5, the first spacer 11 is formed with a joint protection rib portion 11 a formed in a substantially vertical direction along the side surfaces of the water supply joint 5 and the hot water supply joint 8. The second spacer 12 is formed with a fixing means protection rib portion 12 a formed in a substantially vertical direction along the side surface of the mounting screw 13. Further, the first spacer 11 and the joint protection rib portion 11a, the second spacer 12 and the fixing means protection rib portion 12a are not in contact with each other in a state where the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2, and are predetermined. It is configured to have a clearance.

  At the stage of this insulating joint mounting step S60, since the hot water storage tank 1 and the tank water supply pipe are not attached to the housing 2, the housing 2 is held so that the water supply joint 5 and the hot water joint 8 can be easily attached. It is possible to easily change the method. For example, the work may be performed while the housing 2 is in the laid state and the bottom surface of the housing 2 is held on the side surface. When the work is performed in this way, the work can be performed at hand as compared with the case where the water supply joint 5 and the hot water supply joint 8 are attached to the bottom surface of the housing 2 as they are, and the workability is good. Also, it is assumed that the first spacer 11 and the second spacer 12 are attached so as not to contact each other and to have a predetermined clearance when the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2. It is easy to check at the time, and it is possible to prevent problems due to operational mistakes such as forgetting to install or incorrect installation. When the installation of the water supply joint 5 and the hot water supply joint 8 is completed, the insulation joint installation step S60 is completed, and the process proceeds to the tank assembly step S61.

  In the tank assembly step S61, the operation is performed by changing the housing 2 to the original state, that is, the orientation in which the bottom surface of the original housing 2 is the bottom surface. First, after raising the casing 2 from the laid state to the original state, the hot water storage tank 1 is attached in the casing 2 as shown in FIG. 1, and then the tank water supply insulation pipe 6a is installed in the casing as shown in FIG. The water supply joint 5 attached to the body 2 is screwed into the water supply joint 5, and then the tank hot water insulating pipe 7a is screwed into the hot water supply joint 8 attached to the housing 2 as shown in FIG. Next, the hot water storage tank 1 and the tank water supply insulation pipe 6 a are connected by the tank water supply pipe 6, and the hot water storage tank 1 and the tank hot water insulation pipe 7 a are connected by the tank hot water supply pipe 7. Further, when components such as the control device 10 and the temperature sensor 1a are attached to the housing 2, the tank assembly step S61 is completed. If tank assembly step S61 is completed, it will progress to piping connection step S62.

  Thus, in tank assembly step S61, since the water supply joint 5 and the hot water supply joint 8 are already attached to the bottom face of the housing | casing 2, it is not necessary to perform the attachment work with respect to the bottom face of the housing | casing 2, and workability | operativity is improved. Good. Also, when the tank water supply insulation pipe 6a and the tank hot water insulation pipe 7a are attached to the inside of the housing 2, the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2, and that is the starting point. It can be assembled and is easy to assemble.

  The above-described insulating pipe mounting step S60 and tank assembly step S61 are generally steps performed at the factory when producing the hot water storage type hot water heater 50, and the pipe connection step S62 described below is the hot water storage type hot water heater 50. It is a step when installing at the installation location.

  In the pipe connection step S62, the hot water storage tank unit 20 and the heat pump unit 30 are installed at the installation location as shown in FIG. 1 and the water supply pipe 3 connected to the water supply source is connected to the water supply joint 5 of the hot water storage tank unit 20 to the hot water supply joint 4. The hot water supply piping 4 connected to the mixing faucet 18 which is a use side terminal is connected. Further, the hot water tank unit 20 and the heat pump unit 30 are connected by connecting the hot water tank unit side connecting portion 9a of the hot water tank unit 20 and the heat pump unit side connecting portion 9b of the heat pump unit 30 through the heating circulation pipe 9. Further, a power line for obtaining power from the power source 15 such as midnight power is connected to the control device 10, and the pipe connection step S62 is completed.

  As described above, in the pipe connection step S62, the casing 2, the water supply joint 5 and the hot water supply joint 8 of the hot water storage tank unit 20 are electrically insulated. Therefore, when connecting the water supply pipe 3 and the hot water supply pipe 4, as in the conventional case. Therefore, it is not necessary to interpose a pipe having a high electrical insulation property, and it is not necessary to secure a physical space for laying a new pipe having an electrical insulation property at the time of installation work. In addition, since there is no need to secure physical space, there is no need to process a part connected to a hot water storage water heater, a pipe from a pre-laid water supply source, or a pipe to a hot water supply terminal. This eliminates the need for a sealing member and a sealing operation.

  As described above, according to the fourth embodiment, since a conventional synthetic resin pipe having electrical insulation and flexibility is not required as a separate member during installation work, it is unnecessary for construction. There is no effort or cost. Even if the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4 are made of an electrically conductive material such as a metal pipe, the water supply pipe 3 is leaked due to the leakage of the hot water storage hot water supply system 50. The user touches the water supply pipe 3, the water supply branch pipe 3 a, the mixed tap 18 in the house connected to the hot water supply pipe 4, etc. without causing leakage to the water supply branch pipe 3 a and the hot water supply pipe 4. Even if it does, a user does not get an electric shock and it becomes possible to provide a safe hot water storage type water heater.

  In addition, when the hot water storage tank unit 20 is installed outdoors, rainwater is splashed in the vicinity of the water supply joint 5 and the hot water supply joint 8 attached to the bottom surface of the hot water storage tank unit 20 due to rebounding rain or direct scattering to the ground. However, it is possible to prevent rainwater from being directly applied to the water supply joint 5, the hot water supply joint 8, and the mounting screw 13 by the joint protection rib portion 11 a of the first spacer 11 and the fixing means protection rib portion 12 a of the second spacer 12. The first spacer 11, the joint protection rib portion 11a and the second spacer 12, and the fixing means protection rib portion 12a are configured so as not to contact each other and have a predetermined clearance, so that rainwater is present between the spacers. Rainwater once adhered to the ground directly from each spacer or from each rib formed in a substantially vertical direction without remaining due to tension Becomes DOO, insulation performance of the first spacer 11 and second spacer 12 is not lowered by the adhesion of rainwater.

  Since the water supply joint 5 and the hot water supply joint 8 are all connected to the water supply pipe 3, the water supply branch pipe 3a, and the hot water supply pipe 4 connected to the mixed tap 18 in the house, the amount of water flowing inside is almost the same. Therefore, a similar shape can be obtained. Therefore, the first spacer 11 and the second spacer 12 can be made the same common component in the water supply joint 5 and the hot water supply joint 8, so that the cost can be reduced by mass production and the number of parts in the entire hot water storage tank unit 20 can be reduced. There is an effect.

  In each of the above-described embodiments, as an example, the first spacer 11 and the second spacer 12 are sandwiched between the hot water supply joint 8 and the water supply joint 5 and are electrically connected to the mounting screw 13 and the housing 2. However, for example, a method in which the mounting screw 13 itself is made of an electrically insulating material and the second spacer 12 is not used, or the second spacer 12 is connected to the housing 2. The water supply joint 5 and the hot water supply joint 8 may have other configurations capable of ensuring electrical insulation with respect to the housing 2, such as a method in which the fixing means is formed and the mounting screw 13 is not used. In that case, the same effect as described above can be obtained. .

  Further, in each of the above-described embodiments, the heat pump cycle by the heat pump unit 30 is used to heat the water in the hot water storage tank 1, but separately from this, for example, a heat source such as a sheathed heater is built in the hot water storage tank 1. You may use this. In this case, electric leakage occurs from the sheathed heater, electric leakage to the tank water supply pipe 6, the tank outlet pipe 7 and the hot water in the hot water tank 1 through the hot water storage tank 1, and to the housing 2 through the hot water storage tank 1. Even if the current leakage occurs, since the water supply joint 5 and the hot water supply joint 8 are electrically insulated from the housing 2, the leakage from the housing 2 to the water supply pipe 3 and the hot water supply pipe 4 can be prevented. In addition, even if the tank water supply insulation pipe 6a and the tank discharge hot water insulation pipe 7a connected to the hot water storage tank 1 are made of insulating members, and each of the lengths uses hot water contained in the conductor as a conductor, electrical insulation performance is ensured. Since the length is configured, it is possible to prevent electric leakage to the water supply pipe 3 and the hot water supply pipe 4 using water as a conductor. Therefore, even when the water supply pipe 3, the water supply branch pipe 3a, and the hot water supply pipe 4 are made of an electrically conductive material such as a metal pipe, the water supply pipe 3, the water supply branch pipe 3a, and the hot water supply pipe 4 are used. Even if the user touches and operates the mixed faucet 18 in the house connected to the water supply pipe 3, the water supply branch pipe 3 a, or the hot water supply pipe 4, there is no electric leakage. Therefore, it is possible to prevent problems due to electric leakage to the user.

  As described above, the housing 2 containing the hot water storage tank 1, the water supply pipe 3 connected to the water supply source outside the housing 2, and the hot water storage tank 1 are connected to the tank water supply piping built in the housing 2. 6, a tank water supply pipe 6 and a water supply pipe 3 connected to each other, a water supply joint 5 attached to the housing 2, and a user side terminal that is outside the housing 2 and uses hot water in the hot water storage tank 1. A tank hot water supply pipe 7 connected to the hot water supply pipe 4 and the hot water storage tank 1 and built in the housing 2, a hot water supply joint 8 connected to the tank hot water supply pipe 7 and the hot water supply pipe 4 and attached to the housing 2, and a water supply joint 5 and the housing 2, and between the hot water supply joint 8 and the housing 2, and a first spacer 11 made of an electrically insulating material. Since the insulation between the casing 2 and the hot water supply joint 8 and the casing 2 is electrically insulated, Due to a failure of the water heater 50, the leakage from the control device 10 to the housing 2 or the temperature sensor 1a via the hot water storage tank 1 to the tank water supply pipe 6, the tank hot water supply pipe 7, and the hot water in the hot water storage tank 1 Even when an electric leakage occurs to the casing 2 via the heating circuit 9 due to an electric leakage or an electric leakage of the heat pump unit 30 and an electric leakage to the hot water in the casing 2 of the hot water storage tank unit 20 or the hot water storage tank 1 occurs, There is no leakage to the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4, and the user can connect to the water faucet 18 in the house connected to the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4. Even if it is touched and operated, the user does not get an electric shock, and it is possible to prevent problems due to electric leakage to the user.

  Further, a mounting screw 13 that is a fixing means for fixing the water supply joint 5 and the hot water supply joint 8 to the housing 2, a space between the mounting screw 13 that is the fixing means and the water supply joint 5, and a mounting screw 13 that is a fixing means and the hot water supply joint. 8 and a second spacer 12 made of a material having electrical insulation, and the second spacer 12 is a fixing means between the mounting screw 13 and the water supply joint 5 and fixing means. Since the mounting screw 13 and the hot water supply joint 8 are electrically insulated from each other, even if a leakage occurs in the hot water storage hot water supply 50 and the leakage to the housing 2, the water is supplied via the mounting screw 13 that is a fixing means. Houses connected to the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4 do not cause electric leakage to the water supply pipe 3, the water supply branch pipe 3 a, and the hot water supply pipe 4 because they do not leak to the joint 5 and the hot water supply joint 8. Inside mixing faucet 18 etc. Without even the user an electric shock as the user has operated touched, it becomes possible to prevent the problems caused by leakage to the user.

  In addition, the water supply joint 5 and the hot water supply joint 8 are disposed on the bottom surface side of the housing 2, and the first spacer 11 is a joint protection rib formed in a substantially vertical direction along the side surfaces of the water supply joint 5 and the hot water supply joint 8. Since the hot water storage type water heater 50 is installed outdoors and rainwater is splashed by splashing rainwater or the like, the joint protection rib portion 11a of the first spacer 11 can be used to connect the water supply joint 5 and the hot water supply. It is possible to prevent the rainwater from being directly applied to the joint 8, and once attached rainwater falls to the ground directly from the first spacer 11 or from the joint protection rib portion 11 a formed in a substantially vertical direction. The casing 2 and the water supply joint 5 and the hot water supply joint 8 are short-circuited, so that the insulation performance does not deteriorate.

  In addition, the water supply joint 5 and the hot water supply joint 8 are disposed on the bottom surface side of the housing 2, and the second spacer 12 is a fixing means protection formed in a substantially vertical direction along the side surface of the mounting screw 13 that is a fixing means. Since the rib portion 12a is provided, even when the hot water heater 50 is installed outdoors and rainwater is splashed due to splashing rainwater or the like, the fixing means protection rib portion 12a of the second spacer 12 is attached to the mounting screw 13. It is possible to prevent the rainwater from being directly applied, and the rainwater once adhered falls to the ground directly from the first spacer 12 or from the fixing means protection rib portion 12a formed in a substantially vertical direction. 2 and the mounting screw 13 are short-circuited so that the insulation performance does not deteriorate.

  Further, when the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2 by the mounting screws 13 as fixing means, the first gap 11 and the second spacer 12 have a predetermined clearance so as to have a predetermined clearance. Since the first spacer 11 and the second spacer 12 are configured, it is possible to prevent the rainwater from being directly applied to the water supply joint 5, the hot water supply joint 8, and the mounting screw 13 by the joint protection rib portion 11 a and the fixing means protection rib portion 12 a, Since the first spacer 11, the joint protection rib portion 11a and the second spacer 12, and the fixing means protection rib portion 12a are configured not to contact each other and have a predetermined clearance, the first spacer 11 and the second spacer 11 The joint protection rib portion 11a is formed so that the rainwater does not remain due to surface tension between the spacer 12 and the rainwater once adhered is formed directly or substantially in the vertical direction. It will be fall to the ground from the fixing means protecting rib portion 12a, the adhesion of rainwater, insulation performance of the first spacer 11 and second spacer 12 is not reduced.

  Further, a housing 2 containing the hot water storage tank 1, a water supply pipe 3 connected to a water supply source outside the housing 2 and a hot water storage tank 1, and a tank water supply pipe 6 built in the housing 2; A water supply joint 5 connected to the tank water supply pipe 6 and the water supply pipe 3 and attached to the housing 2, and a hot water supply pipe 4 connected to a user terminal outside the housing 2 and using hot water in the hot water storage tank 1. And a hot water storage tank 1 connected to the hot water storage tank 1 and a tank hot water supply pipe 7 built in the housing 2, and a hot water supply joint 8 connected to the tank hot water supply pipe 7 and the hot water supply pipe 4 connected to the housing 2. The first spacer 11 made of a material and interposed between the water supply joint 5 and the housing 2 and between the hot water supply joint 4 and the housing 2 and electrically insulated, and the water supply joint 5 and the hot water supply joint 8 are attached to the housing 2. The fixing screw 13 which is a fixing means for fixing and an electric insulating property And a second spacer 12 that is interposed between the mounting screw 13 that is a fixing means and the water supply joint 5 and between the mounting screw 13 that is a fixing means and the hot water supply joint 8 and is electrically insulated. Insulating joint mounting step for fixing the joint 5 and the hot water supply joint 8 to the housing 2 with the first spacer 11 and the second spacer 12 interposed, and the mounting screw 13 as fixing means, and the hot water storage tank 1 in the housing 2 Since the tank assembly step for attaching the tank water supply pipe 6 and the tank hot water supply pipe 7 and the pipe connection step for attaching the water supply pipe 3 and the hot water supply pipe 4 to the water supply joint 5 and the hot water supply joint 8 are provided. S62 has the following effects.

  Since the hot water storage tank 1 and the tank water supply pipe are not attached to the housing 2 at the stage of the insulating joint mounting step S60, the method for holding the housing 2 so that the water supply joint 5 and the hot water joint 8 can be easily attached. Can be easily changed, and the work can be performed at hand as compared with the case where the water supply joint 5 and the hot water supply joint 8 are attached to the bottom surface of the housing 2 as they are. Also, it is assumed that the first spacer 11 and the second spacer 12 are attached so as not to contact each other and to have a predetermined clearance when the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2. It is easy to confirm at the time and it is possible to prevent problems due to work mistakes. Further, in the tank assembly step S61, since the water supply joint 5 and the hot water supply joint 8 are already attached to the bottom surface of the housing 2, there is no need to perform attachment work on the bottom surface of the housing 2, and workability is good. . Also, when the tank water supply insulation pipe 6a and the tank hot water insulation pipe 7a are attached to the inside of the housing 2, the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2, and that is the starting point. It can be assembled and is easy to assemble. Further, in the pipe connection step S62, the casing 2 of the hot water storage tank unit 20, the water supply joint 5 and the hot water supply joint 8 are electrically insulated. Therefore, when the water supply pipe 3 and the hot water supply pipe 4 are connected, There is no need to intervene piping having electrical insulation properties, and it is not necessary to secure a physical space for laying new piping having electrical insulation properties at the time of installation work. In addition, since there is no need to secure physical space, there is no need to process a part connected to a hot water storage water heater, a pipe from a pre-laid water supply source, or a pipe to a hot water supply terminal. This eliminates the need for a sealing member and a sealing operation. Therefore, it is possible to easily electrically insulate the hot water storage type hot water heater and the piping path connected to the hot water storage type hot water heater, and it is possible to eliminate the time and trouble in construction as in the prior art.

  In addition, when the water supply joint 5 and the hot water supply joint 8 are fixed to the housing 2 by the first spacer 11, the second spacer 12, and the fixing screw 13 as fixing means in the insulating joint mounting step S <b> 60, the first spacer Since the first spacer 11 and the second spacer 12 are configured to have a predetermined gap between the first spacer 11 and the second spacer 12, the hot water storage tank unit 20 is installed outdoors. In the vicinity of the water supply joint 5 and the hot water supply joint 8 attached to the bottom surface of the hot water storage tank unit 20, rainwater is splashed by the rebound of rain to the ground or direct scattering, but the joint protection rib portion 11a and the fixing means protection rib portion 12a. As a result, it is possible to prevent rainwater from being directly applied to the water supply joint 5, the hot water supply joint 8, and the mounting screw 13, and the first spacer 11, the joint protection Since the rib portion 11a, the second spacer 12, and the fixing means protection rib portion 12a are configured so as not to contact each other and have a predetermined clearance, rainwater does not remain between the spacers due to surface tension. The rainwater also falls to the ground directly from each spacer or from the joint protection rib portion 11a and the fixing means protection rib portion 12a formed in a substantially vertical direction, and the first spacer 11 and the second spacer due to the attachment of rainwater. The insulation performance of 12 does not deteriorate.

  As described above, according to the present invention, it is possible to provide a hot water storage type hot water heater that can ensure safety against electric leakage and reduce troubles in arranging separate members at the time of construction and problems in construction.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the hot water storage type water heater which shows Embodiment 1 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 1 of this invention. It is a principal part cross-sectional enlarged view of the hot water storage type water heater by Embodiment 1 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 1 of this invention. It is a principal part cross-sectional enlarged view of the hot water storage type water heater by Embodiment 1 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 2 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 2 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 3 of this invention. It is principal part sectional drawing of the hot water storage type water heater by Embodiment 3 of this invention. It is a flowchart which shows the assembly method of the hot water storage type water heater by Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 1a Temperature sensor 2 Housing | casing 3 Water supply piping 3a Water supply branch piping 4 Hot water supply piping 5 Water supply joint 6 Tank water supply piping 6a Tank water supply insulation piping 7 Tank outlet piping 7a Tank hot water insulation piping 8 Hot water supply coupling 9 Heating circulation piping 9a Hot water storage tank Unit side connection portion 9b Heat pump unit side connection portion 10 Control device 10a Judgment portion 10b Storage portion 15 Power supply 18 Mixing faucet 11 First spacer 12 Second spacer 13 Mounting screw 11a Joint protection rib portion 12a Fixing means protection rib portion 11b Fitting insulation rib 20 Hot water storage tank unit 30 Heat pump unit 50 Hot water storage type water heater

Claims (6)

A housing containing a hot water storage tank;
A tank water supply pipe connected to a hot water storage tank connected to a water supply source outside the housing and built in the housing;
A water supply joint that connects the tank water supply pipe and the water supply pipe and is attached to the housing;
A hot water supply pipe connected to a user terminal that is outside the housing and uses hot water in the hot water storage tank and a tank hot water supply pipe connected to the hot water storage tank and built in the housing;
A hot water supply joint connected to the casing by connecting the tank hot water supply pipe and the hot water supply pipe;
A first spacer that is interposed between the water supply joint and the housing and between the hot water supply joint and the housing and is made of a material having electrical insulation;
With
The hot water storage type hot water heater, wherein the first spacer electrically insulates the water supply joint from the housing and the hot water supply joint from the housing. Fixing means for fixing the water supply joint and the hot water supply joint to the housing;
A second spacer made of a material having electrical insulation properties, interposed between the fixing means and the water supply joint and between the fixing means and the hot water supply joint;
With
2. The hot water storage type hot water heater according to claim 1, wherein the second spacer electrically insulates between the fixing means and the water supply joint and between the fixing means and the hot water supply joint.   The water supply joint and the hot water supply joint are disposed on the bottom surface side of the housing, and the first spacer is formed in a substantially vertical direction along a side surface of the water supply joint and the hot water supply joint, and the water supply joint and The hot water storage type hot water supply device according to claim 1, further comprising a joint protection rib portion that protects the hot water supply joint.   The water supply joint and the hot water supply joint are disposed on the bottom surface side of the housing, and the second spacer is formed in a substantially vertical direction along a side surface of the fixing means to fix the fixing means. The hot water storage type hot water supply device according to any one of claims 2 and 3, further comprising a protective rib portion.   When the water supply joint and the hot water supply joint are fixed to the housing by the fixing means, the first spacer and the second spacer have a predetermined clearance between the first spacer and the second spacer. The hot water storage type hot water supply device according to any one of claims 2 to 4, wherein the second spacer is configured. Insulating joint mounting step for mounting the water supply joint and the hot water supply joint with an electrical insulator interposed in the housing;
A tank assembly step of attaching the hot water storage tank, the tank water supply pipe and the tank outlet pipe to the housing;
A pipe connection step for attaching the water supply pipe and the hot water supply pipe to the water supply joint and the hot water supply joint;
With
The method for assembling a hot water storage type hot water heater according to any one of claims 1 to 5, wherein the tank assembling step is performed after the insulating joint attaching step.

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