JP6077351B2 - Diffusion nozzle and hot water storage water heater provided with the same - Google Patents

Description

  The present invention relates to a diffusion nozzle that weakens the momentum of water supply flowing into a hot water storage tank and a hot water storage type hot water heater provided with the same.

  Conventionally, in this type of diffusion nozzle, as in Patent Document 1 and Patent Document 2, a plurality of outflow holes are opened on the side peripheral surface of a resin-made cylinder whose tip is closed, and the inflow from the open end side. There was one in which the supplied water was allowed to flow into the hot water storage tank so as to diffuse in the circumferential direction of the cylinder.

JP 2009-2613 A JP 2009-24986 A

  However, in this conventional patent document 1, the amount of outflow from the outflow hole on the front end side increases, and the water supply flows out obliquely upward in the hot water storage tank, thereby destroying the temperature stratification in the hot water storage tank. Moreover, in the thing of patent document 2, since the opening area of the outflow hole of a front end side is smaller than the opening area of the outflow hole of an open end side, the flow velocity in the outflow hole of a front end side becomes high, After all, there was a possibility of destroying the temperature stratification in the hot water storage tank.

In order to solve the above-mentioned problem, the present invention has a plurality of outflow holes opened in the side peripheral surface of a hollow cylindrical tube whose one end is closed, and diffuses water flowing in from the other end in the radial direction to In the diffusion nozzle of the hot water storage type hot water heater that supplies water, a collision portion is provided in the middle of the cylindrical body of the diffusion nozzle to collide with a part of the water supply that flows in the direction from the other end side to the one end side. The partition wall that partitions the outflow hole adjacent in the circumferential direction is protruded toward the radially inner side of the cylindrical body from the radial end surface of the partition wall of the outflow hole adjacent in the upstream circumferential direction, The step portion was formed with a step in the axial direction .

Also, the hot water storage tank hot water pipe to the upper water supply pipe is connected to the lower, and the claim 1 Symbol placement storage type water heater having a diffusion nozzle of the water supply port of the water supply pipe is connected to the hot water storage tank did.

  In this way, since the collision part is provided in the middle of the cylinder, a part of the water supply collides with the collision part, so that the momentum of the flow downstream from the collision part is weakened, and the flow rate from the upstream outflow hole is reduced. While increasing, the flow volume from a downstream outflow hole can be reduced and the flow velocity in a downstream outflow hole can be suppressed, without reducing the size of the downstream outflow hole.

  In addition, since the collision part is configured by the step part of the partition wall, the collision part can be easily formed, the flow of the downstream side from the step part is weakened, and the flow rate from the upstream outflow hole is increased. In addition, the flow rate from the downstream outflow hole can be reduced and the flow velocity at the downstream outflow hole can be suppressed without reducing the size of the downstream outflow hole.

  For this reason, the water supplied to the hot water storage tank is supplied by being diffused in the radial direction into the hot water storage tank by the diffusion nozzle, and the hot water in the upper part of the hot water storage tank is pushed up in a planar shape. Hot water can be supplied without disturbing the stratification, and mixing of the upper high temperature layer and the lower low temperature layer can be suppressed to improve hot water storage efficiency.

1 is a schematic configuration diagram of a hot water storage type water heater according to an embodiment of the present invention. Front view of diffusion nozzle of one embodiment The perspective view of the diffusion nozzle of one Embodiment The bottom view of the diffusion nozzle of one embodiment AA end view of a diffusion nozzle of one embodiment The top view of the diffusion nozzle of one embodiment Front view of diffusion nozzle of application example of one embodiment The bottom view of the diffusion nozzle of the application example of one embodiment AA end view of a diffusion nozzle of an application example of one embodiment Front view of diffusion nozzle of another embodiment The perspective view of the diffusion nozzle of another embodiment Bottom view of diffusion nozzle of another embodiment AA end view of the diffusion nozzle of another embodiment

Next, a hot water storage type water heater 1 according to an embodiment of the present invention will be described with reference to the drawings.
2 is a hot water storage tank unit having a hot water storage tank 3 for storing hot water for hot water supply, 4 is a heat pump unit as a heating means for heating hot water in the hot water storage tank 3, 5 is a hot water tap, 6 is a display unit 6a and a plurality of It is a water heater remote controller having an operation switch 6b. The volume of the hot water storage tank 3 is about 150L to 550L.

  7 is a water supply pipe that supplies city water to the bottom of the hot water storage tank 2, 8 is a diffusion nozzle that weakens the momentum of the water flowing into the hot water storage tank 3, 9 is a hot water discharge pipe that discharges hot water from the upper part of the hot water storage tank 3, and 10 is a water supply pipe 7. A water supply bypass pipe branched from the hot water supply pipe 11, a hot water supply mixing valve 11 for mixing hot water from the hot water supply pipe 9 and water from the water supply bypass pipe 10 to a desired temperature, and 12 a hot water mixed by the hot water supply mixing valve 11 A hot water supply pipe leading to the hot water tap 5.

  Reference numeral 13 is a hot water supply temperature sensor provided in the middle of the hot water supply pipe 12 for detecting the hot water supply temperature, reference numeral 14 is a hot water supply flow rate sensor provided in the middle of the hot water supply pipe 12 for detecting the hot water supply flow rate, and reference numeral 15 is a plurality of hot water storage provided on the upper and lower sides of the hot water tank 3. It is a temperature sensor.

  A pressure reducing valve 16 is provided in the hot water storage tank unit 2 at the most upstream position of the water supply pipe 7 to reduce the pressure of the water supply pressure, and 17 is provided by branching from the hot water discharge pipe 9 to release the overpressure in the hot water storage tank 3. It is a valve.

  The heat pump unit 4 includes a compressor 18 that compresses the refrigerant, a refrigerant water heat exchanger 19 that exchanges heat between the compressed high-temperature refrigerant and hot water from the hot water storage tank 3, and the refrigerant that has dissipated heat in the refrigerant water heat exchanger 19. An expansion valve 20 that decompresses the refrigerant, an evaporator 21 that evaporates low-temperature and low-pressure refrigerant, a compressor 18, a refrigerant water heat exchanger 19, an expansion valve 20, and a refrigeration cycle pipe 22 that connects the evaporator 21 in an annular shape, and evaporation A blower 23 that blows outside air serving as a heat source to the vessel 21 and a heating circulation pump 24 that supplies hot water from the hot water storage tank 3 to the water side of the refrigerant water heat exchanger 19 are provided.

  25 is a heating forward pipe connecting the lower part of the hot water storage tank 3 and the water side inlet of the refrigerant water heat exchanger 19 of the heat pump unit 4, and 26 is the water side outlet of the refrigerant water heat exchanger 19 of the heat pump unit 4 and the upper part of the hot water tank 3. The heating return pipe 27 is connected to the lower part of the hot water storage tank 3 through the water supply pipe 7 and branched from the middle of the heating return pipe 26, and 28 is a branching position of the heating return pipe 26 and the heating branch pipe 27. Is a heating three-way valve. The heating branch pipe 27 may be directly connected to the lower part of the hot water storage tank 3.

  Reference numeral 29 denotes an incoming water temperature sensor for detecting the temperature of hot water flowing into the refrigerant water heat exchanger 19 from the heating forward pipe 25, and reference numeral 30 denotes a boiling point for detecting the temperature of hot water flowing from the refrigerant water heat exchanger 19 to the heating return pipe 26. It is a temperature sensor.

  Next, the operation of the hot water storage type water heater of this embodiment will be described.

  When the boiling request is generated, the heating circulation pump 24 is driven in a state in which the heating three-way valve 28 is switched to the heating branch pipe 27 side, and the compressor 18, the expansion valve 20 and the blower 23 are driven to Low temperature hot water at the bottom of the hot water storage tank 3 taken out from the bottom through the heating forward pipe 25 is heated by the refrigerant water heat exchanger 19. At this time, since the heat pump cycle is in the process of starting up, the hot water heated by the refrigerant water heat exchanger 19 does not reach the boiling temperature, so that it is returned to the bottom of the hot water storage tank 3 through the heating branch pipe 27 and the water supply pipe 7. I have to.

  When the heat pump cycle rises and the boiling temperature sensor 30 reaches a predetermined temperature (a temperature lower than the boiling temperature) or higher, the heating three-way valve 28 is switched so that the heating return pipe 25 communicates with the upper part of the hot water storage tank 3, Hot water heated by the refrigerant water heat exchanger 19 so as to reach the boiling temperature is stored in a stacked form from the upper part of the hot water storage tank 3, and a high temperature layer is formed in the upper part of the hot water storage tank 3 and a low temperature layer is formed in the lower part. Is heated up.

  Next, when the hot-water tap 5 is opened and hot water is supplied, the pressure on the hot water supply pipe 12 side is reduced, and the water supplied from the water supply pipe 7 is supplied from the bottom of the hot water storage tank 3. Is pushed out to the hot water pipe 9. On the other hand, the water supplied from the water supply pipe 7 is mixed with the hot water from the hot water outlet pipe 9 by the hot water supply mixing valve 11 through the water supply bypass pipe 10 and supplied to the hot water tap 5 through the hot water supply pipe 12.

  Here, the diffusion nozzle 8 that weakens the momentum of the water supply flowing into the hot water storage tank 3 will be described in detail.

  2 is the same as the front view, the front view, the left and right side views, and the rear view of the diffusion nozzle 8. FIG. 3 is a perspective view of 45 degrees laterally and obliquely viewed from above, and FIG. 5 is a bottom view of the diffusion nozzle 8 shown, FIG. 5 is a cross-sectional view taken along the line AA, and FIG. 6 is a plan view.

  The diffusion nozzle 8 has a plurality of outflow holes 32, 33 opened on the side peripheral surface of a hollow cylindrical body 31 whose one end is closed and the other end is opened, and a plurality of outflows of water supplied from the other end side. The hot water is discharged from the holes 32 and 33 into the hot water storage tank 3.

  The outflow holes 32 and 33 are divided into four in the circumferential direction by vertical partition walls 34 provided every 90 degrees in the circumferential direction of the cylindrical body 31, and the vertical partition walls 34 are connected in an annular shape. Then, it is divided into two in the axial direction by a cross-shaped partition wall 35 that divides the upstream and downstream in the axial direction of the cylindrical body 31, a total of eight outflow holes are opened, and 32 in the four outflow holes on the upstream side. The reference numeral is attached, and the reference numeral 33 is attached to the four outflow holes on the downstream side.

  The horizontal cross-wall-shaped partition wall 35 protrudes from the inner peripheral wall of the cylindrical body 31 toward the radially inner side of the cylindrical body 31 with respect to the thickness of the cylindrical body 31, and has an annular protrusion 37 having a flow hole 36 at the center. The upstream side surface of the annular protrusion 37 acts as a collision part where a part of the water supply flowing from the other end side toward the one end side collides.

  The vertical rail-shaped partition wall 34 is provided with the upstream partition wall 34a in the vertical rail-shaped partition wall 34 divided by the horizontal rail-shaped partition wall 35 on the upstream side and the downstream side, and is provided downstream. 34b is attached to the partition wall on the side, the upstream partition wall 34a has the same radial thickness as the thickness of the cylindrical body 31, and the downstream partition wall 34b has a horizontal beam shape. When the diffusion nozzle 8 is viewed from the bottom surface, the vertical partition walls 34a and 34b are not visible, and the horizontal rails have the same radial thickness as the ring width of the partition walls 35 and the annular protrusions 37. Only the collision surface of the annular projection 37 and the closed surface at the tip of the annular partition wall 35 are visible.

  When water is supplied, the flow flowing in the vicinity of the inner peripheral wall of the cylindrical body 31 collides with the annular protrusion 37, changes the flow direction, and flows out from the upstream outflow hole 32 while spreading in the radial direction. The flow that has flowed out from the central flow hole 36 in the center of the protrusion 37 to the downstream region is once expanded in the downstream region and further weakened, and then spread radially from the downstream outflow hole 33 in all directions. Therefore, the flow rate from the downstream outlet hole 33 can be reduced without reducing the opening area of the downstream outlet hole 33, and the opening area of the downstream outlet hole 33 is increased. The flow velocity at the outflow hole 33 on the downstream side can be further suppressed.

  Further, since the diffusion nozzle 8 has the shape as described above, when the diffusion nozzle 8 is manufactured, the resin material is divided into upper and lower (or left and right) split molds and a cylindrical nested mold in the axial direction of the cylinder 31. In combination, the outflow holes 32 and 33 can be manufactured together in a shape having a collision portion, the mold structure is simple, and the manufacturing can be realized very easily and at low cost.

  The water supplied into the hot water storage tank 3 is supplied by being diffused in the radial direction into the hot water storage tank 3 by the diffusion nozzle 8 and pushes up the hot water in the upper part of the hot water storage tank 3 in a plane. It is possible to supply hot water without disturbing the temperature stratification in 3, and to suppress mixing of the upper high temperature layer and the lower low temperature layer, thereby improving hot water storage efficiency.

  As shown in FIGS. 7 to 9, a horizontal rail-like partition wall 35 a is provided so as to further divide the downstream outflow hole 33 in the axial direction, and this partition wall 35 a faces the radially inner side of the cylindrical body 31. Further, it may be added as a configuration having an annular protrusion 37 a that protrudes from the upstream side cross-shaped partition wall 35 and has a flow hole 36 a having a smaller diameter than the flow hole 36 on the upstream side.

  Next, another embodiment of the diffusion nozzle 8 will be described with reference to FIGS.

  The diffusion nozzle 8 according to this alternative embodiment has a thickness that protrudes from the middle of the downstream vertical partition wall 34b in the axial direction toward the radially inner side from the thickness of the upstream vertical partition wall 34a. A stepped portion 38 that forms a step in the axial direction on the downstream vertical partition wall 34b, and the stepped portion 38 collides with a part of the water supply that flows from the other end side to the one end side. Acts as

  When the diffusion nozzle 8 is viewed from the bottom, the stepped portion 38 of the downstream vertical partition wall 34b, the collision surface of the annular protrusion 37 of the horizontal rail partition wall 35, and the closed surface of the tip are It is configured to be visible.

  When water is supplied, the flow flowing in the vicinity of the inner peripheral wall of the cylindrical body 31 collides with the annular protrusion 37, changes the flow direction, and flows out from the upstream outflow hole 32 while spreading in the radial direction. The flow that has flowed out from the central flow hole 36 in the center of the protrusion 37 to the downstream region is once expanded in the downstream region and further weakened, and then a part of the downstream vertical partition wall 34b. And the flow direction is changed to flow out from the downstream outflow hole 33 while spreading radially in the four directions, and the remaining flow is further downstream after the momentum is weakened by the collision with the stepped portion 38. Since it is possible to flow in the radial direction from the outflow hole 33, the flow rate from the outflow hole 33 on the downstream side can be reduced without reducing the opening area of the outflow hole 33 on the downstream side. Increase the opening area of 33 to the downstream side It is possible to further suppress the flow velocity in the Deana 33.

  Further, since the diffusion nozzle 8 has the shape as described above, when the diffusion nozzle 8 is manufactured, the resin material is divided into upper and lower (or left and right) split molds and a cylindrical nested mold in the axial direction of the cylinder 31. In combination, the outflow holes 32 and 33 can be manufactured together in a shape having a collision portion, the mold structure is simple, and the manufacturing can be realized very easily and at low cost.

  The water supplied into the hot water storage tank 3 is supplied by being diffused in the radial direction into the hot water storage tank 3 by the diffusion nozzle 8 and pushes up the hot water in the upper part of the hot water storage tank 3 in a plane. It is possible to supply hot water without disturbing the temperature stratification in 3, and to suppress mixing of the upper high temperature layer and the lower low temperature layer, thereby improving hot water storage efficiency.

  In addition, this invention is not limited to said embodiment, It can modify | change within the range which does not change the summary of invention, In the said embodiment, the hot water storage type hot water heater heated up in a laminated form with the heat pump unit 4 is provided. Although illustrated, even if it is the hot water storage type water heater which boils the hot water in the hot water storage tank 3 with the electric heater provided in the hot water storage tank 3, or boils the hot water in the hot water storage tank 3 with the waste heat of a power generator. Since the temperature stratification by the high temperature layer and the low temperature layer is formed in the hot water storage tank 3 by supplying hot water, the diffusion nozzle 8 of the present invention is useful.

DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water supply machine 3 Hot water storage tank 7 Water supply pipe 8 Diffusion nozzle 9 Hot water discharge pipe 31 Cylindrical body 32 Outflow hole 33 Outflow hole 34a Partition wall 34b Partition wall 35 Partition wall 36 Flow hole 37 Ring-shaped protrusion 38 Step part

Claims (2)

A diffusion nozzle for a hot water storage type hot water heater in which a plurality of outflow holes are opened on the side peripheral surface of a hollow cylindrical tube closed at one end, and the water flowing from the other end is diffused in the radial direction to supply water into the hot water storage tank. A part of the water supply flowing from the other end side to the one end side collides in the middle of the cylinder of the diffusion nozzle, and the collision part defines the outflow hole adjacent in the circumferential direction on the downstream side A stepped portion having a step formed in the axial direction by projecting a partition wall that protrudes radially inward from the radial end surface of the partition wall of the outflow hole adjacent in the upstream circumferential direction. spreading nozzle, characterized in that. The hot water storage tank hot water pipe to the upper water supply pipe is connected to the lower, hot-water storage type water heater the water supply tube is provided with a diffusion nozzle of the water supply port claim 1 Symbol mounting which is connected to the hot water storage tank.

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