JP6241359B2 - Hot water storage water heater and pipe fitting - Google Patents

Description

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

  Hot water storage water heaters configured to store hot water obtained by heating water by a heating means such as a heat pump in a hot water storage tank, take out the hot water from the hot water storage tank and supply it to the hot water supply terminal when necessary are widely used. ing. The hot water storage type hot water heater includes many pipe joints for connecting various pipes and functional parts. Since these pipe joints are different in shape (L-shaped, T-shaped, etc.) and length, they are difficult to share and often require dedicated parts. Therefore, a dedicated molding die must be prepared for various types of pipe joints having different shapes and lengths, and there is a problem that the manufacturing cost is high.

  The following Patent Document 1 has a receiving pipe having a flange at the free end, an inlet pipe having an enlarged portion at the free end, and a groove for receiving an O-ring seal formed at the enlarged portion. However, when the outer diameter of the enlarged portion is adapted to the inner diameter of the receiving pipe in a slip-fit state and is slid axially with respect to each other, the enlarged portion can secure various axial positions in the receiving pipe, and the flange of the receiving pipe A pipe joint for attaching an annular coil spring and an annular cage to the outer periphery is disclosed.

JP 11-148586 A

  In the configuration disclosed in Patent Document 1, the relative position between the receiving pipe (female side member) and the incoming pipe (male side member) cannot be reliably fixed, and the insertion length of the incoming pipe with respect to the receiving pipe changes. There is a risk of it. Therefore, it is difficult to maintain the insertion length of the incoming pipe with respect to the receiving pipe at an appropriate length.

  The present invention has been made to solve the above-described problems, and can easily change the insertion length of the male side member into the female side member and securely fix the insertion length. It is an object of the present invention to provide a pipe joint that can be used and a hot water storage type water heater provided with the pipe joint.

A hot water storage type water heater according to the present invention is a hot water storage type hot water heater provided with a pipe joint, and the pipe joint includes a female side member, a male side member having an insertion portion inserted into the female side member, and a female side member. A fixing member that fixes the insertion length of the insertion portion to the side member, the female side member has a meshing portion that meshes with the fixing tool, and the male side member has a meshing portion that meshes with the fixing tool. has the the plurality of different locations position in the axial direction, Ri insertion length of the insertion portion into the female member by changing the position of the meshing portion of the male member meshing with fixture river, engagement of the male member The portion includes a plurality of first meshing portions arranged along the axial direction, and a plurality of second meshing portions arranged along the axial direction at positions different from the first meshing portion in the circumferential direction of the insertion portion, position of the engagement portion and the position of the second engagement portion is shall be offset in the axial direction.
Further, the hot water storage type hot water heater according to the present invention is a hot water storage type hot water heater provided with a pipe joint, and the pipe joint includes a female side member and a male side member having an insertion portion inserted inside the female side member; A fixing member that fixes the insertion length of the insertion portion to the female side member, the female side member has a meshing portion that meshes with the fixing tool, and the male side member has a meshing portion that meshes with the fixing tool, The insertion length of the insertion portion to the female side member changes by changing the position of the engagement portion of the male side member that has a plurality of positions in the axial direction of the insertion portion that are engaged with the fixture. The rotation of the fixture is prevented by the meshing portion coming into contact with the fixture.
Further, the pipe joint according to the present invention includes a female member, a male member having an insertion portion inserted inside the female member, and a fixture for fixing the insertion length of the insertion portion into the female member. The female side member has a meshing portion that meshes with the fixture, and the male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portions are different from each other. The insertion length of the insertion part to the female side member is changed by changing the position of the meshing part of the male side member meshing with the male side member, and the meshing part of the male side member includes a plurality of first meshing parts arranged along the axial direction, A plurality of second meshing portions arranged along the axial direction at different positions in the circumferential direction of the insertion portion with respect to the first meshing portion, and the positions of the first meshing portion and the second meshing portion are shifted in the axial direction. It is what.
Further, the pipe joint according to the present invention includes a female member, a male member having an insertion portion inserted inside the female member, and a fixture for fixing the insertion length of the insertion portion into the female member. The female side member has a meshing portion that meshes with the fixture, and the male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portions are different from each other. The insertion length of the insertion part into the female member changes by changing the position of the engagement part of the male member that meshes with the male member, and the rotation of the fixing tool is prevented by the engagement of the male member with the fixing tool Is.

  According to the present invention, a pipe joint capable of easily changing the insertion length of the male side member into the female side member and securely fixing the insertion length, and a hot water storage type hot water supply provided with the pipe joint It becomes possible to provide a machine.

It is a block diagram which shows the hot water storage type water heater of Embodiment 1 of this invention. It is a perspective view which shows the pipe joint of Embodiment 1 of this invention. It is a disassembled perspective view of the pipe joint shown in FIG. It is a perspective view which expands and shows a part of pipe joint shown in FIG. It is a perspective view which shows the state which changed the insertion length to the female side member of one insertion part of the male side member of the pipe joint shown in FIG. It is a perspective view which expands and shows a part of pipe joint of Embodiment 2 of this invention. It is a figure which shows typically the hot water storage tank unit of the hot water storage type water heater of Embodiment 3 of this invention. It is a figure for demonstrating the example of the variation of a female side member. It is a figure for demonstrating the example of the variation of a female side member. It is a figure for demonstrating the example of the variation of a female side member. It is a figure for demonstrating the example of the variation of a female side member. It is a figure for demonstrating the example of the variation of a male side member. It is a figure for demonstrating the example of the variation of a male side member.

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

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating a hot water storage type water heater according to Embodiment 1 of the present invention. As shown in FIG. 1, the hot water storage type water heater 1 according to the first embodiment includes a hot water storage tank unit 40 and a heat pump unit 50. The hot water storage tank unit 40 includes a hot water storage tank 10 having a substantially cylindrical shape and an exterior case 30 having a substantially rectangular parallelepiped shape. The hot water storage tank 10 is accommodated in the exterior case 30 in a state covered with a heat insulating member. The heat pump unit 50 functions as a heating unit that generates hot water by heating water. Hot water stored in the hot water storage tank 10 is supplied to a predetermined hot water supply destination as necessary. The heating means in the present invention is not limited to a heat pump type, and may be any configuration such as a configuration in which a heater is installed in the hot water storage tank 10.

  Connected to the lower part of the hot water storage tank 10 are a water supply pipe 11 and a heat pump forward pipe 13 a for sending low temperature water in the hot water storage tank 10 to the heat pump unit 50. In addition, a heat pump return pipe 13 b for returning hot water heated by the heat pump unit 50 into the hot water storage tank 10 is connected to the upper part of the hot water storage tank 10. The hot water supply pipe 12 is a pipe for supplying hot water to a predetermined hot water tap (not shown) such as a bathroom shower or a kitchen faucet. The bath piping 14 is a piping for supplying hot water to a bathtub (not shown).

  An upper surface of the outer case 30 of the hot water storage tank unit 40 is constituted by a top plate 32. In addition, a kick-in part 31 whose front side is retracted is formed in the lower part of the exterior case 30. The kick-in portion 31 is used to draw each of the water supply pipe 11, the heat pump return pipe 13 a, the heat pump return pipe 13 b, the hot water supply pipe 12, and the bath supply pipe 14 into the hot water storage tank unit 40 or in the hot water storage tank unit 40. A pipe connection part for drawing out from each is provided.

  Support legs 35 are connected to the lower part of the outer case 30. The hot water storage tank unit 40 is installed on the base C by fixing each support leg 35 to an anchor bolt (not shown) installed on the concrete base C. In addition, a pipe cover (not shown) is provided below the outer case 30 in order to improve the design of the hot water storage tank unit 40 by covering the pipe connection part and the pipes connected to the pipe connection part. .

  In the hot water storage type hot water heater 1 having the above-described configuration, the hot water storage tank 10 is always filled with the high temperature hot water in the upper layer and the low temperature water in the lower layer by the water supply from the water supply pipe 11, and the hot water in the hot water storage tank 10 is maintained. A constant water supply pressure is applied to the water supply pipe 11. At the time of boiling operation, the low temperature water in the lower part of the hot water storage tank 10 is sent to the heat exchanger (heat radiator) in the heat pump unit 50 through the heat pump outgoing pipe 13a, and is boiled by the heat exchanger and heated to high temperature. It becomes. The hot water returns to the hot water storage tank 10 through the heat pump return pipe 13b and flows into the hot water storage tank 10 from above.

  Further, at the time of hot water supply, hot water in the hot water storage tank 10 flows into the hot water supply pipe due to the water supply pressure from the water supply pipe 11, and the hot water and low temperature water from the water supply pipe 11 are mixed by the mixing valve. Thus, hot water having a hot water supply temperature set by a user with a remote controller (not shown) or the like is generated, and the hot water passes through the hot water supply pipe 12 or the flow-out pipe 14, and the hot water tap of a predetermined hot water supply destination such as a bathroom or kitchen. Or it is supplied to the bathtub.

  Although not shown in detail, in the hot water storage tank unit 40, in addition to the hot water storage tank 10, functional parts such as piping, pumps, valves, heat exchangers, and the like are provided and connected therebetween. For this purpose, a plurality of pipe joints 20 are provided. Hereinafter, the configuration of one of the pipe joints 20 will be described in detail.

  FIG. 2 is a perspective view showing the pipe joint 20 of the first embodiment. FIG. 3 is an exploded perspective view of the pipe joint 20 shown in FIG. 4 is an enlarged perspective view showing a part of the pipe joint 20 shown in FIG.

  As shown in FIG. 2, the pipe joint 20 of the first embodiment is an L-shaped elbow that bends substantially at a right angle. However, the pipe joint of the present invention is not limited to such an L-shaped one, and may have any shape such as one having a different bending angle, one having a T-shape, or one having an I-shape (straight shape). May be good.

  As shown in FIG. 3, the pipe joint 20 includes a male side member 21, a female side member 22, and a fixture 23. The male side member 21 has an insertion portion 21 a that is inserted inside the female side member 22. The male side member 21 of the first embodiment has insertion portions 21a at both ends, and one insertion portion 21a and the other insertion portion 21a are substantially perpendicular to each other. The female member 22 and the fixture 23 can be attached to each insertion portion 21a. The fixture 23 has a function of fixing the insertion length of the insertion portion 21 a to the female side member 22.

  Since the two insertion portions 21a included in the male member 21 of the first embodiment have substantially the same configuration, only one insertion portion 21a will be described below. The outer diameter of the distal end portion of the insertion portion 21a is larger than that of other portions. An annular groove is formed on the outer periphery of the distal end portion of the insertion portion 21a. An O-ring 19 (seal member) is attached to an annular groove on the outer periphery of the distal end portion of the insertion portion 21a. When the insertion portion 21 a is inserted inside the female side member 22, the O-ring 19 closely slides on the inner peripheral surface of the female side member 22, thereby connecting the male side member 21 and the female side member 22. The liquid-tightness is ensured.

  The male side member 21 has a meshing portion that can mesh with the fixture 23 at a plurality of locations where the positions of the insertion portion 21a in the axial direction are different. In the first embodiment, the meshing portion of the male side member 21 is constituted by a convex portion formed on the outer side (outer peripheral surface) of the insertion portion 21. Moreover, the male side member 21 of this Embodiment 1 has several 1st convex part 21b (1st meshing part) and several 2nd convex part 21c (2nd meshing part) as this convex part. . The plurality of first convex portions 21b are arranged at equal intervals along the axial direction of the insertion portion 21a. The plurality of second convex portions 21c are formed at different positions in the circumferential direction of the insertion portion 21a with respect to the plurality of first convex portions 21b. In the first embodiment, the plurality of second convex portions 21c are formed at positions different from the central axis of the insertion portion 21a by 90 ° compared to the plurality of first convex portions 21b. The plurality of second convex portions 21c are arranged at equal intervals along the axial direction of the insertion portion 21a. The arrangement pitch of the first protrusions 21b is equal to the arrangement pitch of the second protrusions 21c. The position of the 1st convex part 21b and the position of the 2nd convex part 21c have shifted | deviated to the axial direction of the insertion part 21a. In the first embodiment, the magnitude of the shift is about one half of the arrangement pitch of the first convex portions 21b (that is, the arrangement pitch of the second convex portions 21c). In addition, the meshing part of the male member 21 is not limited to a convex part like this Embodiment 1, For example, you may comprise by a recessed part.

  The female side member 22 has a meshing portion that can mesh with the fixture 23. In this Embodiment 1, the meshing part of the female side member 22 is comprised by the flange part 22a which protrudes in the outer peripheral side of the female side opening part in which the insertion part 21a of the male side member 21 is inserted. The female side member 22 according to the first embodiment has an insertion portion 22b that is inserted into a female side opening (not shown) of another pipe or functional component on the side opposite to the female side opening where the insertion portion 21a is inserted. Have An annular O-ring attachment groove 22c is provided on the outer periphery of the insertion portion 22b. In the female-side member 22 in the present invention, the shape of the portion other than the female-side opening into which the insertion portion 21a is inserted is not limited to the above-described shape, and as described in Embodiment 3 described later, It is possible to have a shape of Further, the meshing portion of the female side member 22 is not limited to the flange portion 22a as in the first embodiment, and may be constituted by a protrusion, for example. The constituent materials of the male side member 21 and the female side member 22 are not particularly limited, but a resin material is preferable because it can be manufactured lightly and inexpensively and is hardly corroded.

  The fixing tool 23 engages with a part of the convex portion of the male side member 21 and the flange portion 22a of the female side member 22, thereby fixing the insertion length of the insertion portion 21a into the female side member 22. To do. The fixture 23 of the first embodiment is made of an elastic material (such as a metal material). The fixture 23 has a shape sandwiching the male side member 21 and the female side member 22. By fixing the fixture 23 so as to open, the fixture 23 can be attached so as to sandwich the male member 21 and the female member 22. With the fixture 23 attached, the fixture 23 tightens the male member 21 and the female member 22 by the elastic force of the fixture 23.

  The fixture 23 is tightened with the pair of grooves 23 a inserted into the flange 22 a, the pair of first tightening portions 23 b tightened with the outer periphery of the insertion portion 21 a of the male member 21, and the outer periphery of the female member 22 A pair of second fastening portions 23c. The first tightening portion 23b is curved in an arc shape that can come into contact with the outer peripheral surface of the insertion portion 21a. The second tightening portion 23 c is curved in an arc shape that can contact the outer peripheral surface of the female side member 22. A gap between the first tightening portion 23b and the second tightening portion 23c is a groove 23a. The width of the groove 23a is substantially equal to the thickness of the flange portion 22a. As shown in FIG. 4, the axial position between the fixture 23 and the female member 22 is fixed by inserting the flange portion 22a into the groove 23a. The first fastening portion 23b meshes with the first convex portion 21b or the second convex portion 21c, so that the axial position between the fixture 23 and the male side member 21 is fixed. In this manner, the axial positions of the male side member 21 and the female side member 22 are fixed via the fixture 23.

  In such a pipe joint 20, the insertion length of the insertion portion 21 a into the female side member 22 can be changed by changing the meshing position of the fixing portion 23 with respect to the male side member 21. That is, the insertion length of the insertion portion 21a into the female member 22 can be changed by changing the position of the convex portion (meshing portion) with which the first tightening portion 23b of the fixture 23 is engaged. In the first embodiment, the first tightening portion 23b of the fixture 23 can mesh with the first convex portion 21b. Further, by rotating the fixing tool 23 by 90 ° around the central axis of the insertion portion 21a and the female side member 22 from that state, the first tightening portion 23b of the fixing device 23 can mesh with the second convex portion 21c. it can. Further, in the pipe joint 20 according to the first embodiment, the insertion length (direction A in FIG. 3) of the one insertion portion 21a of the male side member 21 into the female side member 22 and the female portion of the other insertion portion 21a. The length of insertion into the side member 22 (direction B in FIG. 3) can be changed.

  As shown in FIG. 4, in one insertion part 21a of the male side member 21 (upper right side insertion part 21a in FIG. 4), the first tightening part 23b of the fixture 23 is a plurality of first convex parts 21b. Mesh with a part of. For example, the insertion length of the insertion portion 21a can be made shorter than that in FIG. 4 by moving the position of this engagement to the first convex portion 21b on the right in FIG. 4 (not shown). . In this case, the change in the insertion length of the insertion portion 21a is equal to the arrangement pitch of the first convex portions 21b. In this way, in the first embodiment, the insertion length of the insertion portion 21a can be adjusted at a pitch equal to the arrangement pitch of the first convex portions 21b.

  In the other insertion portion 21a of the male member 21 (the lower left insertion portion 21a in FIG. 4), the first tightening portion 23b of the fixture 23 is engaged with some of the plurality of second convex portions 21c. ing. For example, the insertion length of the insertion portion 21a can be made shorter than the state shown in FIG. 4 by moving the meshing position to the second convex portion 21c one lower in FIG. 4 (not shown). . In this case, the change in the insertion length of the insertion portion 21a is equal to the arrangement pitch of the second convex portions 21c. Thus, in the first embodiment, the insertion length of the insertion portion 21a can be adjusted at a pitch equal to the arrangement pitch of the second convex portions 21c.

  The width of the first tightening portion 23b of the fixture 23 is substantially equal to the width of the groove formed between the adjacent first convex portions 21b, and is approximately equal to the width of the groove formed between the adjacent second convex portions 21c. . For this reason, it is suppressed reliably that the fixing tool 23 shifts | deviates to the axial direction of the insertion part 21a.

  Thus, according to the pipe joint 20 of the first embodiment, the insertion length of the insertion portion 21a of the male side member 21 to the female side member 22 can be easily changed, and the insertion length can be reduced. It can be fixed securely. Therefore, by adjusting the insertion length of the insertion portion 21a, it is possible to use the common pipe joint 20 even in a place where the shape or length of the counterpart connecting the pipe and the functional parts is different. As a result, since it is possible to share the parts of the plurality of pipe joints 20 used in the hot water storage type hot water heater 1, it is possible to suppress the need for a dedicated resin molding die, and it is necessary to manufacture the die. Cost can be reduced. Also, by sharing parts, the production quantity of one part increases and a large number of molds can be obtained, so the unit price (processing cost) of the part can be reduced.

  In particular, in the first embodiment, the insertion lengths (directions A and B in FIG. 3) of the two insertion portions 21a included in the male side member 21 into the female side member 22 can be changed. The versatility of the joint 20 is high, and the common use of parts of the pipe joint 20 in the hot water storage type hot water heater 1 can be further promoted.

  FIG. 5 is a perspective view showing a state in which the insertion length of the one insertion portion 21a of the male side member 21 of the pipe joint 20 shown in FIG. 4 into the female side member 22 is changed. In the state shown in FIG. 5, in one insertion part 21a of the male side member 21 (upper right side insertion part 21a in FIG. 5), the first tightening part 23b of the fixture 23 is the plurality of second convex parts 21c. Mesh with a part of. In the state of FIG. 5, the insertion length of the insertion portion 21a is shorter than in the state of FIG. The change in the insertion length of the insertion portion 21a between the state of FIG. 5 and the state of FIG. 4 is about one half of the arrangement pitch of the first convex portions 21b (that is, the arrangement pitch of the second convex portions 21c). . In this way, in the first embodiment, the insertion length of the insertion portion 21a is adjusted at a pitch that is about one half of the arrangement pitch of the first convex portions 21b (that is, the arrangement pitch of the second convex portions 21c). can do.

  Thus, in the first embodiment, two sets of meshing portions (first convex portion 21b and second convex portion) whose axial positions are shifted at different positions in the circumferential direction of the insertion portion 21a of the male member 21 are used. By providing 21c), the insertion length of the insertion portion 21a into the female side member 22 can be adjusted in more stages (with a finer pitch). However, in this invention, you may make only one set (only one of the 1st convex part 21b and the 2nd convex part 21c) the meshing part provided in the insertion part 21a. Alternatively, the insertion length of the insertion portion 21a into the female side member 22 can be set to the length of insertion of the insertion portion 21a into the female side member 22 by providing three or more pairs of engagement portions whose axial positions are shifted at different positions in the circumferential direction of the insertion portion 21a. It is also possible to make adjustments possible in more stages (with a finer pitch).

Embodiment 2. FIG.
Next, the second embodiment of the present invention will be described with reference to FIG. 6. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted. FIG. 6 is an enlarged perspective view showing a part of the pipe joint 20 according to the second embodiment of the present invention.

  As shown in FIG. 6, in the pipe joint 20 according to the second embodiment, the lengths of the first convex portion 21b and the second convex portion 21c in the circumferential direction of the insertion portion 21a (the dimension indicated by L in FIG. 6). It is longer than that in the first embodiment. In the state shown in FIG. 6, the first tightening portion 23b of the fixture 23 is engaged with a part of the plurality of first convex portions 21b. A part of the plurality of second convex portions 21c that do not mesh with the first tightening portion 23b of the fixture 23 is located between the pair of first tightening portions 23b. For this reason, when the fixture 23 tries to rotate around the central axis of the insertion portion 21a and the female side member 22, the rotation of the fixture 23 is prevented by the second convex portion 21c coming into contact with the first fastening portion 23b. Is done. Therefore, according to the second embodiment, the fixture 23 can be reliably prevented from rotating naturally, and the fixation by the fixture 23 can be reliably held. In addition, although illustration is abbreviate | omitted, when the 1st clamp | tightening part 23b of the fixing tool 23 has meshed with some of several 2nd convex parts 21c, some of several 1st convex parts 21b However, by being positioned between the pair of first fastening portions 23b, the rotation of the fixture 23 is prevented in the same manner as described above.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Is omitted. FIG. 7 is a diagram schematically showing a hot water storage tank unit 40 of the hot water storage type water heater 1 according to Embodiment 3 of the present invention.

  As shown in FIG. 7, the hot water storage tank unit 40 of the hot water storage type water heater 1 of the third embodiment includes the pipe joints 20A, 20B, 20C, 20D, and 20E of the present invention. Since the connection structure between the male side member and the female side member of the pipe joints 20A to 20E is the same as that of the first embodiment, detailed illustration and description thereof will be omitted. Moreover, although the pipe joints 20A-20E are provided with the fixture 23 similar to Embodiment 1, illustration is abbreviate | omitted.

  The pipe joint 20A includes an L-shaped male side member 21A, a female side member 22A connected to one insertion portion 21a of the male side member 21A, and a female side connected to the other insertion portion 21a of the male side member 21A. Side member 22B. The pipe joint 20B includes a male side member 21A, a female side member 22B connected to one insertion portion 21a of the male side member 21A, and a female side member 22C connected to the other insertion portion 21a of the male side member 21A. Have The pipe joint 20C includes a T-shaped male side member 21B having three insertion portions 21a, a female side member 22A connected to the first insertion portion 21a of the male side member 21B, and a first side of the male side member 21B. It has a female side member 22C connected to the second insertion portion 21a and a female side member 22D connected to the third insertion portion 21a of the male side member 21B. The pipe joint 20D includes an I-shaped male side member 21C, a female side member 22A connected to one insertion portion 21a of the male side member 21C, and a female side connected to the other insertion portion 21a of the male side member 21C. Side member 22D. The pipe joint 20E includes an L-shaped male side member 21D, a female side member 22A connected to one insertion portion 21a of the male side member 21D, and a female side connected to the other insertion portion 21a of the male side member 21D. Side member 22C.

  The male side member 21A is a component common to the pipe joints 20A and 20B. The female member 22A is a component common to the pipe joints 20A, 20C, 20D, and 20E. The female member 22B is a component common to the pipe joints 20A and 20B. The female side member 22C is a component common to the pipe joints 20B, 20C, and 20E. The female side member 22D is a component common to the pipe joints 20C and 20D.

  Thus, in the hot water storage type water heater 1 according to the third embodiment, in the plurality of pipe joints 20A to 20E, one or both of the male side member and the female side member can be configured by common parts. For this reason, it can suppress that a dedicated resin molding die is required, and the cost required for manufacturing the die can be suppressed. Also, by sharing parts, the production quantity of one part increases and a large number of molds can be obtained, so the unit price (processing cost) of the part can be reduced. From these things, it becomes possible to reduce the manufacturing cost of the hot water storage type hot water heater 1.

  8 to 11 are views for explaining examples of variations of the female-side member 22. For convenience, reference numerals 22E to 22H are assigned to the female members in FIGS. 8 to 11, respectively. As the female side members 22A to 22D in FIG. 7, for example, various female side members 22E to 22H as shown in FIGS. 8 to 11 can be used.

  The female side member 22E shown in FIG. 8 has an insertion portion 22b to be inserted into a female side opening (not shown) of another pipe or functional component on the side opposite to the female side opening connected to the male side member 21. Have. Two annular O-ring mounting grooves 22c are formed on the outer periphery of the insertion portion 22b. For this reason, this female side member 22E can attach two O-rings (illustration omitted) to the outer periphery of the insertion part 22b.

  The female side member 22F shown in FIG. 9 has a female side opening portion into which a male side insertion portion (not shown) of another pipe or functional component is inserted on the opposite side of the female side opening portion connected to the male side member 21. 22d. The female member 22G shown in FIG. 10 has a shape in which a water drain plug 22e is integrally provided. The female side member 22H shown in FIG. 11 has a hose attachment portion 22f that can be connected to a hose (not shown) on the opposite side of the female side opening connected to the male side member 21.

  12 and 13 are diagrams for explaining examples of variations of the male side member 21. FIG. For convenience, reference numerals 21E and 22F are assigned to the male side members of FIGS. 12 and 13, respectively. For example, a male side member 21E shown in FIG. 12 can be used as the L-shaped male side members 21A and 21D of FIG. Further, as the T-shaped male side member 21B of FIG. 7, for example, a male side member 21F as shown in FIG. 13 can be used.

  The male side member 21E shown in FIG. 12 has an L-shape, and has a thermistor fixing structure 21d for attaching the thermistor at its corner. As described above, the male member 21 according to the present invention can deal with not only variations such as L-shape, T-shape, and I-shape, but also the presence or absence of a functional structure such as the thermistor fixing structure 21d. Is possible.

  The male side member 21F shown in FIG. 13 has a T-shape and has three insertion portions 21a. A cap 24 can be attached to the distal end portion of the insertion portion 21a. The cap 24 liquid-tightly seals the opening at the tip of the insertion portion 21a. As shown in FIG. 13, the male side member 21F can be used as a substantially I-shaped male side member by attaching the cap 24 to the central insertion portion 21a of the male side member 21F. Moreover, although illustration is abbreviate | omitted, the male side member 21F can be used as a substantially L-shaped male side member by attaching the cap 24 to the other insertion part 21a of the male side member 21F. By configuring in this way, the L-shaped, T-shaped, and I-shaped male side members 21 can be used as a common component, so that the sharing of components can be further promoted. In addition, although illustration is abbreviate | omitted, in this invention, you may use the male side member 21 which has four or more insertion parts 21a.

  Although the embodiments of the present invention have been described above, the present invention may be implemented by arbitrarily combining features of the above-described embodiments. Moreover, the pipe joint of the present invention can be applied to various devices having fluid flow paths in addition to the hot water storage type water heater.

DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water supply machine, 10 Hot water storage tank, 11 Hot water supply piping, 12 Hot water supply piping, 13a Heat pump outgoing piping, 13b Heat pump return piping, 14 Outflow piping, 19 O-ring, 20, 20A, 20B, 20C, 20D, 20E 21, 21A, 21B, 21C, 21D, 21E, 21F Male side member, 21a insertion portion, 21b first convex portion, 21c second convex portion, 21d thermistor fixing structure, 22, 22A, 22B, 22C, 22D, 22E, 22F, 22G, 22H Female side member, 22a Flange part, 22b Insertion part, 22c O-ring attachment groove, 22d Female side opening part, 22e Drain plug, 22f Hose attachment part, 23 Fixing tool, 23a Groove, 23b First Tightening part, 23c Second fastening part, 24 cap, 30 exterior case, 31 Inclusive portion, 32 top plate, 35 support legs, 40 hot water storage tank unit, 50 heat pump unit

Claims (5)

A hot water storage type water heater provided with a pipe joint,
The pipe joint is
A female member;
A male side member having an insertion portion inserted inside the female side member;
A fixture for fixing the insertion length of the insertion portion to the female member;
With
The female side member has a meshing portion that meshes with the fixture,
The male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portion are different from each other,
Wherein Ri wherein the insertion portion insertion length of the said female member by changing the position of the meshing portion of the male member meshing with fixture River,
The meshing portion of the male side member includes a plurality of first meshing portions arranged along the axial direction, and a plurality of meshing portions arranged along the axial direction at positions different from the first meshing portion in the circumferential direction of the insertion portion. A second meshing portion of
Water storage type water heater and a position of the first engagement portion and the position of the second engagement portion that are displaced in the axial direction. A hot water storage type water heater provided with a pipe joint,
The pipe joint is
A female member;
A male side member having an insertion portion inserted inside the female side member;
A fixture for fixing the insertion length of the insertion portion to the female member;
With
The female side member has a meshing portion that meshes with the fixture,
The male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portion are different from each other,
Wherein Ri wherein the insertion portion insertion length of the said female member by changing the position of the meshing portion of the male member meshing with fixture River,
The male-side hot-water storage type water heater rotation Ru is prevented in the fixture by the engagement portion comes into contact with the fixture member. The hot water storage type hot water supply device according to claim 1 or 2 , comprising one or both of the female side member and the male side member including a plurality of the pipe joints configured by common parts. A female member;
A male side member having an insertion portion inserted inside the female side member;
A fixture for fixing the insertion length of the insertion portion to the female member;
With
The female side member has a meshing portion that meshes with the fixture,
The male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portion are different from each other,
Wherein Ri wherein the insertion portion insertion length of the said female member by changing the position of the meshing portion of the male member meshing with fixture River,
The meshing portion of the male side member includes a plurality of first meshing portions arranged along the axial direction, and a plurality of meshing portions arranged along the axial direction at positions different from the first meshing portion in the circumferential direction of the insertion portion. A second meshing portion of
Pipe joint and a position of the first engagement portion and the position of the second engagement portion that are displaced in the axial direction. A female member;
A male side member having an insertion portion inserted inside the female side member;
A fixture for fixing the insertion length of the insertion portion to the female member;
With
The female side member has a meshing portion that meshes with the fixture,
The male side member has a meshing portion that meshes with the fixture at a plurality of locations where the axial positions of the insertion portion are different from each other,
Wherein Ri wherein the insertion portion insertion length of the said female member by changing the position of the meshing portion of the male member meshing with fixture River,
The male-side the engagement portion is a pipe joint whose rotation Ru is prevented in the fixture by contacting the fixture member.

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