JP2016075395A - Hot water take-out device and hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the fault of a revolution drive part while improving assembly workability and maintainability by integrating each component related to a hot water take-out device.SOLUTION: A medium temperature water take-out valve 1 includes: a hot water taking-out pipe 2; a body 6; a stepping motor 8; a hot water taking-out port 9; a movement regulation part 10; and so on. The hot water taking-out pipe 2, the body 6, and the stepping motor 8 are configured as one piece pre-assembled. When taking-out medium temperature water in a hot water storage tank 210 with the medium temperature water take-out valve 1, the tip position of a bend section 4 is aligned with the position where desired temperature medium temperature water is left in the hot water storage tank 210 by driving a shaft 5 with the stepping motor 8 to rotate the hot water taking-out pipe 2. The movement regulation part 10 limits the movement of the hot water taking-out pipe 2 in an axial direction in a stepped hole 7 of the body 6 when pressure fluctuation occurs in the hot water storage tank 210, and so forth.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a hot water take-out device used for a hot water storage type hot water heater and a hot water storage type hot water heater using the hot water take-out device.

  As a conventional technique, for example, as described in Patent Document 1 (Japanese Patent Laid-Open No. 2010-175186), a hot water storage type hot water heater in which a hot water storage mechanism is installed in a hot water storage tank is known. In the prior art, hot water is stored in a hot water storage tank in a stacked state so that hot water is stored on the upper side and low temperature hot water is stored on the lower side. The intermediate temperature water take-out mechanism preferentially takes out the intermediate temperature water generated in the hot water storage process (that is, hot water that has not risen up to a specified temperature) from the hot water storage tank. The intermediate temperature water take-out mechanism of the prior art is configured by an L-shaped tubular member, and is bent so that the axes of both end portions are different from each other.

JP 2010-175186 A

  However, in the prior art described in Patent Document 1 described above, it is necessary to install an L-shaped tubular member serving as an intermediate-temperature water extraction mechanism in the hot water storage tank. For this reason, in the manufacturing process of the hot water storage type hot water supply apparatus, it is necessary to insert an L-shaped tubular member into the hot water storage tank and attach it to a specified position, and there is a problem that workability is lowered. Further, if the intermediate temperature water take-out mechanism is composed of an L-shaped tubular member, for example, if a failure occurs inside the intermediate temperature water take-out mechanism, it is difficult to remove only the failed part. There is a problem that decreases. Furthermore, in the prior art, axial movement of a tubular member, a shaft, or the like may occur due to pressure fluctuation in the hot water storage tank. Such a movement of the shaft may cause a failure of a stepping motor or the like that serves as rotational power.

  The present invention has been made to solve the above-described problems, and it is possible to integrate the parts related to the hot water take-out device to improve the assembly workability and maintainability, and to break down the rotation drive unit. An object of the present invention is to provide a hot water take-out device and a hot water storage type water heater capable of suppressing the above.

  The hot water take-out device according to the present invention has a straight pipe portion that extends linearly and a curved pipe portion that is bent and extended from one end of the straight pipe portion, and is attached to a side portion of a tank that stores hot water. The hot water outlet pipe with the straight pipe part arranged outside the tank and the curved pipe part inside the tank, and the other end of the straight pipe part centered on the axis of the straight pipe part Body part that holds the side rotatably, a rotation drive part that can rotate the hot water take-out pipe around the axis of the straight pipe part, and hot water in the tank that is provided in the body part and flows into the hot water take-out pipe And a movement restricting portion for restricting the movement of the hot water extraction pipe in the axial direction of the straight pipe portion.

  According to the present invention, the hot water take-out pipe, the body part, and the rotation drive part can be configured as an integrated part assembled in advance. Thereby, the attachment / detachment operation | work of the warm water extraction apparatus with respect to a tank can be facilitated, and the assembly workability | operativity and maintainability can be improved. Further, the movement restricting unit can suppress the movement of the hot water outlet pipe in the axial direction due to a pressure fluctuation in the tank. Thereby, failure of a rotation drive part etc. can be prevented and durability of a warm water extraction device can be improved.

It is a block diagram which shows the hot water storage type water heater by Embodiment 1 of this invention. It is a perspective view which shows the middle temperature water extraction valve by Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the state which fractured | ruptured the intermediate temperature water extraction valve in FIG. 2 by the plane containing the rotating shaft of a hot water extraction pipe | tube. It is a principal part enlarged view in FIG. 3 which expands and shows the vicinity of a movement control part. It is a partial expanded sectional view which shows the body part, stepping motor, etc. of the middle temperature water extraction valve by Embodiment 2 of this invention. It is a cross-sectional view which shows the state which fractured | ruptured the intermediate | middle warm water extraction valve by Embodiment 3 of this invention by the plane perpendicular | vertical to the rotating shaft of a warm water extraction pipe | tube.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In each drawing used in this specification, common elements are denoted by the same reference numerals, and redundant description is omitted. Further, the present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention. In the present specification, “hot water” means high temperature water (high temperature hot water), low temperature water (low temperature hot water, water) and medium temperature water. Medium temperature water means warm water having an intermediate temperature between high and low temperatures.

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 this figure, a hot water storage type hot water heater 100 according to this embodiment includes a hot water storage unit 200 and a heat pump unit 300. The heat pump unit 300 generates hot water by heating hot water using heat in the atmosphere. The hot water storage type hot water heater 100 is a heat pump type hot water storage type hot water heater (heat pump hot water supply device) that boiles hot water by the heat pump unit 300 and stores hot water having various temperatures in the hot water storage unit 200.

  The hot water storage unit 200 includes a hot water storage tank 210, mixing valves 220A and 220B, a water supply pipe 230, hot water supply pipes 240A, 240B, 240C, and 240D. The hot water storage tank 210 stores hot water boiled by the heat pump unit 300, and is configured by, for example, a vertically long tank. Hot water is stored in the hot water storage tank 210 in a stacked state so that the hot water temperature is higher at the upper side and the hot water temperature is lower at the lower side. A hot water outlet valve 1 described later is attached to a side surface portion of the hot water storage tank 210 at an intermediate position in the vertical direction (for example, an intermediate position). The side surface portion of the hot water storage tank 210 is a part that is not easily affected by the temperature of the hot water stored in the hot water storage tank 210.

  The mixing valves 220A and 220B mix two types of hot water and water having different temperatures, and each have two inflow ports and one outflow port. First, the mixing valve 220A will be described. One inflow port of the mixing valve 220A is connected to the upper part of the hot water storage tank 210 via the hot water supply pipe 240A. The other inflow port of the mixing valve 220 </ b> A is connected to the water supply pipe 230. The water supply pipe 230 is connected to the lower part of the hot water storage tank 210 and the mixing valve 220A, and supplies low temperature water such as city water to the hot water storage tank 210 and the mixing valve 220A.

  On the other hand, the outflow port of the mixing valve 220A is connected to the inflow port of the mixing valve 220B via the hot water supply pipe 240C. The mixing valve 220A generates medium temperature water by mixing high temperature water taken out from the upper part of the hot water storage tank 210 through the hot water supply pipe 240A and low temperature water supplied from the water supply pipe 230, and the generated medium temperature water is Supply to mixing valve 220B.

  The other inflow port of the mixing valve 220B is connected to an intermediate portion in the vertical direction of the hot water storage tank 210 via the intermediate temperature water discharge valve 1 and the hot water supply pipe 240B. The outflow port of the mixing valve 220B is connected to an external hot water supply target (not shown) via the hot water supply pipe 240D. The mixing valve 220B mixes the medium-temperature water supplied from the mixing valve 220A and the medium-temperature water extracted from the hot water storage tank 210 by the medium-temperature water extraction valve 1, and supplies the generated medium-temperature water to the hot water supply target.

  Thus, at least 240B of hot water supply piping 240A-240D is connected to the hot water storage tank 210 via the intermediate temperature water extraction valve 1, and supplies the hot water taken out from the hot water storage tank 210 to the hot water supply object. The mixing valves 220A and 220B are connected to a control device (not shown). A control apparatus adjusts the mixing ratio of the hot water in each mixing valve according to a user's setting etc., for example. Therefore, the hot water storage type water heater 100 can supply hot water having a desired temperature desired by the user to the hot water supply target.

  Next, with reference to FIG. 2 to FIG. 4, the intermediate temperature water extraction valve 1 as a hot water extraction device provided in the hot water storage type hot water heater 100 will be described. FIG. 2 is a perspective view showing the intermediate temperature water extraction valve 1 according to Embodiment 1 of the present invention. FIG. 3 is a longitudinal sectional view showing a state in which the intermediate temperature water extraction valve 1 in FIG. 2 is broken along a plane including the rotation axis of the hot water extraction pipe 2. FIG. 4 is an enlarged view of a main part in FIG. 3 showing the vicinity of the movement restricting part in an enlarged manner. As shown in these drawings, the intermediate hot water outlet valve 1 includes a hot water outlet pipe 2, a body portion 6, a stepping motor 8, a hot water outlet 9, a movement restriction portion 10, and the like. The intermediate temperature water extraction valve 1 extracts intermediate temperature water from the hot water storage tank 210 and supplies the extracted intermediate temperature water to the mixing valve 220B.

  As shown in FIG. 3, the hot water outlet pipe 2 is configured by a tubular member bent in a substantially V shape as a whole, and includes a straight pipe portion 3, a curved pipe portion 4, and a shaft 5. The straight pipe portion 3 is configured by a linearly extending cylindrical tube, and the axis of the straight pipe portion 3 coincides with the rotation axis when the hot water outlet pipe 2 rotates. In addition, an outlet 3 </ b> A is formed on the outer peripheral side of the straight pipe portion 3 for allowing hot water flowing inside the straight pipe portion 3 to flow out. The outlet 3 </ b> A opens at a position communicating with the hot water outlet 9. The curved pipe portion 4 is connected to one end of the straight pipe portion 3 and extends obliquely from one end of the straight pipe portion 3. That is, the axis of the curved pipe portion 4 is inclined obliquely with respect to the rotation axis of the hot water outlet pipe 2. The shaft 5 is formed in a rod shape having a smaller diameter than the straight pipe portion 3, and is connected coaxially to the other end of the straight pipe portion 3. The other end side of the shaft 5 is connected to the stepping motor 8.

  The body portion 6 is formed as a hollow structure having a substantially L-shaped outer shape, for example, and a stepped hole 7 as an insertion hole is formed therein. The stepped hole 7 has a stepped shape in which the diameter of the other end side located on the stepping motor 8 side is smaller than the one end side located on the hot water storage tank 210 side. The straight pipe portion 3 of the hot water outlet pipe 2 is inserted into the large diameter portion (one end side) of the stepped hole 7, and the shaft 5 is inserted into the small diameter portion (the other end side) of the stepped hole 7. Thereby, the body part 6 is holding | maintaining the straight pipe part 3 and the shaft 5 rotatably centering | focusing on the rotating shaft of the hot water extraction pipe | tube 2. As shown in FIG.

  The stepping motor 8 rotates the hot water take-out pipe 2 around the rotation axis, and constitutes the rotation drive unit of the present embodiment. The stepping motor 8 is attached to the other end side of the body portion 6 and is controlled by the control device. That is, the rotation angle of the hot water outlet pipe 2 by the stepping motor 8 can be variably set by the control device. In the present embodiment, the stepping motor 8 is exemplified, but various motors other than the stepping motor may be used for the rotational drive unit of the present invention.

  Thus, the intermediate temperature water extraction valve 1 of the present embodiment is obtained by assembling the straight pipe portion 3, the curved pipe portion 4 and the shaft 5 of the hot water extraction tube 2, and the stepping motor 8 to the body portion 6. is there. That is, the hot water take-out pipe 2, the body portion 6 and the stepping motor 8 are configured as an integrated part assembled in advance. According to this configuration, since the components related to the intermediate hot water take-off valve 1 can be integrated, the hot water take-out device can be easily attached to and detached from the hot water storage tank 210, and its assembling workability and maintainability can be improved. Can do. Therefore, the hot water storage type hot water heater 100 that is easy to assemble and has high maintainability can be realized.

  In the present invention, the hot water outlet pipe 2 is formed by integrally forming the straight pipe portion 3 and the curved pipe portion 4 with, for example, a bent tubular member and joining the shaft 5 to the other end side of the tubular member. May be. Further, in the present invention, the straight pipe portion 3, the curved pipe portion 4 and the shaft 5 of the hot water take-out pipe 2 may be integrally formed from the beginning, or these parts are separately formed and then integrated to form the hot water take-out pipe. 2 may be formed.

  Further, the body portion 6 is provided with a hot water outlet 9 that is opened in a portion of the stepped hole 7 that faces the outlet 3 </ b> A of the straight pipe portion 3. The hot water outlet 9 extends in a radial direction from the stepped hole 7. For example, a hot water supply pipe 240B (see FIG. 1) is connected to the distal end side of the hot water outlet 9 as a hot water outlet pipe. The hot water outlet 9 takes out the hot water to the outside of the intermediate hot water outlet valve 1 when the hot water in the hot water storage tank 210 flows into the hot water outlet pipe 2 and flows out from the outlet 3A of the straight pipe section 3. .

  On the other hand, as shown in FIG. 3, a circular mounting hole is formed in the side surface portion of the hot water storage tank 210 for mounting the intermediate temperature water discharge valve 1, and a stepped cylindrical mounting portion 215 is formed in this mounting hole. Is fixed. The attachment portion 215 is provided with, for example, a general metal fastener (not shown). In the intermediate hot water outlet valve 1, the bent pipe portion 4 of the hot water outlet pipe 2 is inserted into the hot water storage tank 210 from the attachment portion 215, and the opening end of the stepped hole 7 of the body portion 6 abuts the end surface of the attachment portion 215. In this state, it is detachably attached to the side surface of the hot water storage tank 210 by the fastener. In this state, the straight pipe portion 3 is disposed outside the hot water storage tank 210 and is inserted across the attachment portion 215 and the stepped hole 7.

  The movement restricting part 10 restricts the hot water outlet pipe 2 from moving in the axial direction of the straight pipe part 3 with respect to the body part 6. As shown in FIGS. 3 and 4, the movement restricting portion 10 is configured by, for example, an annular protrusion provided on the outer peripheral surface of the straight pipe portion 3, and protrudes radially outward from the outer peripheral surface of the straight pipe portion 3. Yes. In addition, the movement restricting portion 10 is disposed between the opening end of the body portion 6 and the end surface of the attachment portion 215 that are abutted with each other (the abutting portion of both). As a result, the movement restricting portion 10 can restrict the hot water discharge pipe 2 from moving in the axial direction within the stepped hole 7 of the body portion 6 when, for example, a pressure fluctuation occurs in the hot water storage tank 210. it can.

(Operation of intermediate hot water take-off valve 1)
Next, the operation of the intermediate temperature water extraction valve 1 will be described. First, when intermediate temperature water in the hot water storage tank 210 is extracted by the intermediate temperature water extraction valve 1, the stepping motor 8 is driven by the control device, and the shaft 5 of the hot water extraction pipe 2 is rotationally driven by the stepping motor 8. Thereby, the whole hot water extraction pipe 2 rotates around the rotation axis, and the tip position of the curved pipe portion 4 is displaced in the vertical direction in the hot water storage tank 210. At this time, the distal end position of the curved pipe portion 4 is adjusted to a position where intermediate temperature water at a temperature desired to be taken out in the hot water storage tank 210 stays.

  As a specific example, when it is desired to take out the relatively hot medium-temperature water, the rotation angle of the hot-water outlet pipe 2 is set so that the curved pipe portion 4 faces upward. Moreover, when taking out comparatively low temperature warm water, the rotation angle of the warm water extraction pipe 2 is set so that the curved pipe portion 4 faces downward. Then, for example, when the mixing valve 220 </ b> B (see FIG. 1) is activated to start taking out the warm water, the warm water in the hot water storage tank 210 flows into the warm water discharge pipe 2. This hot water is taken out to the hot water supply pipe 240B via the outlet 3A of the straight pipe portion 3 and the hot water outlet 9.

  Moreover, the pressure fluctuation in the hot water storage tank 210 may act on the hot water outlet pipe 2 as an axial external force (pressing force and tensile force). However, this external force is received by the body portion 6 and the attachment portion 215 via the movement restricting portion 10. As a result, the hot water take-out pipe 2 is held at a prescribed axial position in the stepped hole 7 of the body portion 6, and movement in the axial direction is restricted. According to this configuration, the movement restricting unit 10 can suppress the hot water extraction pipe 2 from moving in the axial direction. Thereby, for example, failure of the stepping motor 8 caused by the shaft 5 moving and hitting the stepping motor 8 can be prevented. Accordingly, it is possible to improve the durability of the intermediate temperature water take-off valve 1 and the hot water storage type water heater 100 equipped with the same.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. The feature of the present embodiment is that, in the configuration almost the same as in the first embodiment, a step portion is provided in the stepped hole of the body portion, and the movement restricting portion provided on the outer peripheral side of the straight pipe portion of the hot water outlet pipe is The configuration is to face the stepped portion. FIG. 5 is a partially enlarged cross-sectional view showing a body portion, a stepping motor, and the like of the intermediate warm water outlet valve according to Embodiment 2 of the present invention.

  As shown in FIG. 5, the intermediate temperature water extraction valve 11 of the present embodiment is configured in substantially the same manner as in the first embodiment. However, the movement restricting portion 12 is configured by an annular step portion positioned between the straight pipe portion 3 and the shaft 5, and is provided on the outer peripheral side of the hot water outlet pipe 2. The stepped hole 7 of the body portion 6 is provided with an annular stepped portion 7A at a position where the stepped hole 7 is reduced in diameter from the large diameter portion to the small diameter portion. And the movement control part 12 faces the step part 7A of the stepped hole 7 in the axial direction, and is configured to restrict the movement of the hot water discharge pipe 2 by coming into contact with the step part 7A.

  In the present embodiment configured as described above, substantially the same effects as those of the first embodiment can be obtained. That is, when the hot water discharge pipe 2 is pressed toward the stepping motor 8 due to pressure fluctuation in the hot water storage tank 210, the movement restricting portion 12 contacts the stepped portion 7 </ b> A of the stepped hole 7. Thereby, excessive movement of the hot water take-out pipe 2 can be restricted, and failure of the stepping motor 8 can be prevented.

  In the first and second embodiments, the case where the movement restricting portion 10 is provided on the outer peripheral side of the straight pipe portion 3 or the movement restricting portion 12 is provided between the straight pipe portion 3 and the shaft 5 is exemplified. However, the present invention is not limited to these specific examples, and the movement restricting portion may be provided at an arbitrary position where the movement of the hot water outlet pipe 2 in the axial direction can be restricted.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. The feature of this embodiment is that a plurality of openings are provided in the straight pipe portion of the hot water outlet pipe in the configuration almost the same as that of the first embodiment. FIG. 6 is a cross-sectional view showing a state in which the intermediate warm water outlet valve according to Embodiment 3 of the present invention is broken along a plane perpendicular to the rotation axis of the hot water outlet pipe.

  As shown in FIG. 6, the intermediate temperature water extraction valve 21 of the present embodiment is configured in substantially the same manner as in the first embodiment. However, a plurality of outlets 3 </ b> A are formed in the straight pipe portion 3 of the hot water outlet pipe 2 at intervals in the circumferential direction as openings that penetrate the peripheral wall of the straight pipe portion 3. These outlets 3A allow the flow in the straight pipe section 3 regardless of the angle at which the hot water take-out pipe 2 rotates (whatever the temperature range of the intermediate hot water taken out from the hot water storage tank 210 is). It is possible to keep the road and the hot water outlet 9 in communication with each other at all times. Further, by providing a plurality of outlets 3A, pressure loss in the flow path in the intermediate temperature water extraction valve 21 can be reduced, and the intermediate temperature water can be efficiently extracted.

  In the first to third embodiments, the intermediate temperature water take-off valves 1, 11 and 21 for taking out the intermediate temperature water from the hot water storage tank 210 of the hot water storage type hot water heater 100 are exemplified. However, the present invention may be applied to a hot water take-out device that takes out hot water (high-temperature water, low-temperature water, etc.) other than medium-temperature water from a tank, for example. The present invention is not limited to a hot water storage type hot water supply device, and may be applied to various hot water extraction devices that take out hot water from a tank provided in equipment other than the hot water storage type hot water supply device. In the first to third embodiments, individual configurations are exemplified, but the present invention includes all combinations of the configurations described in the first to third embodiments.

1,11,21 Middle hot water outlet valve (hot water outlet), 2 Hot water outlet pipe, 3 Straight pipe part, 3A Outlet (opening), 4 Curved pipe part, 5 Shaft, 6 Body part, 7 Stepped hole (insertion) Hole), 8 stepping motor (rotation drive part), 9 hot water outlet, 10, 12 movement restriction part, 100 hot water storage type hot water heater, 200 hot water storage unit, 210 hot water storage tank (tank), 215 mounting part, 220A, 220B mixing valve , 230 Water supply piping, 240A, 240B, 240C, 240D Hot water supply piping, 300 Heat pump unit

Claims (5)

A straight pipe portion that extends in a straight line and a bent pipe portion that bends and extends from one end of the straight pipe portion, and when the straight pipe portion is attached to a side surface portion of a tank that stores hot water, the straight pipe portion A hot water outlet pipe arranged outside and the bent pipe part arranged inside the tank;
A body part attached to a side surface part of the tank and rotatably holding the other end side of the straight pipe part around the axis of the straight pipe part;
A rotation drive unit capable of rotating the hot water extraction pipe around the axis of the straight pipe part;
A hot water outlet provided in the body portion and for taking out the hot water in the tank that has flowed into the hot water outlet pipe;
A movement restricting portion for restricting movement of the hot water outlet pipe in the axial direction of the straight pipe portion;
Hot water take-out device equipped with. The body portion is configured to be attached in contact with the tank side portion,
The hot water take-out device according to claim 1, wherein the movement restricting portion is provided on an outer peripheral side of the hot water take-out pipe, and is arranged at an abutting portion between the portion on the tank side and the body portion. The body part is provided with an insertion hole through which at least the straight pipe part of the hot water outlet pipe is inserted, and a step part in which a part of the insertion hole has a reduced diameter,
The hot water take-out device according to claim 1 or 2, wherein the movement restricting portion is provided on an outer peripheral side of the hot water take-out pipe and faces the step portion of the body portion in the axial direction. In the straight pipe portion of the hot water outlet pipe, a plurality of openings penetrating the peripheral wall of the straight pipe portion are formed at intervals in the circumferential direction,
The plurality of openings are any one of claims 1 to 3, wherein the flow path in the straight pipe portion and the hot water outlet are always in communication with each other even when the hot water outlet pipe rotates. The hot water take-out device described in 1. The hot water extraction device according to any one of claims 1 to 4,
Hot water is stored in a stacked state so that the hot water temperature becomes higher toward the upper side, and a tank in which the hot water take-out device is attached to the middle part in the vertical direction;
A hot water supply pipe that is connected to the tank through at least a part of the hot water extraction device and supplies hot water extracted from the tank to a hot water supply target;
Hot water storage water heater equipped with.

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