JP6578149B2 - Heat pump type water heater - Google Patents

Description

  The present invention relates to a heat pump type hot water supply apparatus, and more particularly to a heat pump type hot water supply apparatus provided with a temperature buffer container provided in a hot water supply pipe of a hot water source such as a hot water supply heat exchanger or a hot water storage container.

  In a heat pump hot water supply apparatus using a refrigeration cycle, hot water stored in a hot water storage container is used as a heat medium, tap water serving as a heat exchange medium is heated, and hot water generated by heating the tap water is provided to the user. A heat pump type hot water supply device with a hot water supply function for supplying hot water is known. Such a heat pump type hot water supply apparatus has a hot water supply heat exchanger that heats tap water by exchanging heat between tap water and high temperature water, and the high temperature water is configured to flow through the high temperature pipe of the hot water supply heat exchanger by the pump. Has been.

  A heat pump type hot water supply apparatus having a hot water supply heat exchanger is described in, for example, Japanese Patent Application Laid-Open No. 2014-105978 (Patent Document 1). By the way, in such a heat pump type hot water supply apparatus, there is a phenomenon in which high-temperature hot water is supplied for a short time when the faucet plug or shower plug is opened. Therefore, the user is not preferable because the user is directly exposed to the hot water. Further, the same phenomenon occurs even in a system in which hot water is supplied from a hot water storage container to a faucet plug or shower plug instead of from a hot water supply heat exchanger.

  For this reason, a temperature buffering container (also called accumulator) that cools the hot water is placed in the middle of the hot water outlet piping of the hot water source such as a hot water supply heat exchanger or hot water storage container, and the user opens the faucet plug or shower plug. The hot hot water is prevented from being supplied at the time.

JP 2014-105978 A

  By the way, a conventional temperature buffering container for cooling hot water provided in the middle of a hot water supply heat exchanger or a hot water outlet pipe has a small-diameter cylindrical inflow pipe with a small hole formed on the side peripheral surface. The structure is such that it is inserted and fixed in the mixing tube, and the outlet end is inserted and fixed in the mixing tube. The inlet pipe is fluidly connected to a hot water source of a hot water supply heat exchanger or a hot water storage container, and the outlet end is fluidly connected to a faucet plug or a shower plug. In addition, tap water is supplied to the faucet plug and the shower plug, and the temperature is adjusted to a temperature suitable for use.

  Then, as described above, the temperature buffer container directly discharges hot water having a high temperature from a small hole formed in the side peripheral surface of the inflow pipe in the radial direction, stirred in the mixing pipe, mixed and cooled. It flows out from the end. In the mixing tube having such a configuration, the hot water is not sufficiently stirred and mixed in the mixing tube, and is sent directly from the outlet end in this state. However, there was a flow with “temperature unevenness” in which insufficient areas were mixed. Accordingly, users are required to supply hot water that is sufficiently mixed with little “temperature unevenness”.

  An object of the present invention is to provide a heat pump type hot water supply apparatus provided with a novel temperature buffering container capable of discharging hot water with little “temperature unevenness” by sufficiently mixing hot water in a mixing tube.

  A feature of the present invention is that, in the temperature buffer container, a cylindrical inflow pipe having a small hole on the side peripheral surface and a cylindrical outflow pipe having a small hole on the side peripheral surface face each other and the inner peripheral surface of the mixing pipe It is in the place which arranged so that a mixing space may be formed between.

  According to the present invention, hot water having a high temperature is ejected in a radial direction through a small hole formed on the side peripheral surface of the inflow pipe, and the hot water after being stirred and mixed in the mixing pipe flows to the outflow pipe side. Since it flows into the outflow pipe from the radial direction through a small hole formed in the side peripheral surface of the outflow pipe, hot water with less “temperature unevenness” can be discharged from the outflow pipe.

It is a block diagram which shows the structure of the heat pump type hot water supply apparatus with which this invention is applied. It is an external view of the temperature buffer container which becomes the 1st Embodiment of this invention. It is sectional drawing which shows the AA cross section of FIG. It is sectional drawing which shows the state before connecting the mixing pipe | tube of a temperature buffer container. It is sectional drawing which shows the state after connecting the mixing tube of a temperature buffer container. It is sectional drawing of the temperature buffer container which becomes the 2nd Embodiment of this invention. It is an external appearance perspective view of the inflow tube which becomes the 3rd Embodiment of this invention. It is sectional drawing which shows an example of the BB cross section of FIG. It is sectional drawing which shows the other example of the BB cross section of FIG. It is sectional drawing of the conventional temperature buffer container.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is included in the range.

  First, before describing the embodiment of the present invention, a schematic configuration of a heat pump hot water supply apparatus to which the present invention is applied will be described. Moreover, in order to help the understanding of the present invention, the configuration of a conventional temperature buffer container and its problems will be described together.

  FIG. 1 shows an outline of a CO2 heat pump type hot water supply apparatus. The heat pump type hot water supply apparatus includes a heat pump unit 11 that is equipped with a heat pump cycle 10 that heats tap water to boil hot water during a boiling operation, a water cycle 12 that operates during a boiling operation, and a hot water supply channel that operates during hot water supply. The hot water storage unit 14 is equipped with a group 13.

  The heat pump cycle 10 has a configuration in which the compressor 15, the water / refrigerant heat exchanger 16, the expansion valve 17, and the evaporator 18 are annularly connected by a refrigerant pipe 19. A blower fan 20 is provided as a blower. Here, the structure which consists of the evaporator 18 and the ventilation fan 20 is a heat exchanger, and the evaporator 18 becomes a heat exchanger.

  The water-side cycle 12 has a configuration in which a water / refrigerant heat exchanger 16 is annularly connected by a water circulation pipe 23 to exchange heat between the hot water storage vessel 21, the boiling circulation pump 22, the refrigerant of the heat pump cycle 10 and the water in the hot water storage vessel 21. It is. Further, a hot water supply heat exchanger 24 for exchanging heat between the hot water in the hot water storage container 21 and tap water and supplying hot water to a faucet plug or the like is provided.

  The hot water supply flow path group 13 includes a hot water pipe 25 that supplies tap water to the hot water storage container 21 and the hot water supply heat exchanger 24, a hot water supply pipe 26 that supplies hot water from the hot water heat exchanger 24 to a faucet plug, and the hot water storage container 21. The hot water supply pipe 27 for supplying hot water to the faucet plug and the bathtub. In addition, tap water is supplied to the hot water supply pipes 26 and 27 from a water pipe (not shown), and is controlled to a temperature required by the user and supplied to a faucet plug and a bathtub.

  A temperature buffer container 28 that is an object of the present invention is disposed in the middle of a hot water supply pipe 26 connected to an outlet of a hot water supply heat exchanger 24 that is a hot water source. The temperature buffer container 28 has a function of lowering the temperature of hot water in order to prevent hot hot water from being supplied from the faucet plug or shower tap immediately after the faucet plug or bathroom shower tap is opened.

  Generally, the volume of the temperature buffer container 28 is set to about 300 cc to 400 cc, and the hot water flowing into the temperature buffer container 28 is cooled from 90 ° C. to a temperature of 45 ° C. to 40 ° C. Thereby, it is possible to suppress the supply of hot hot water immediately after the faucet plug or shower plug is opened. The configuration of the temperature buffer container 28 will be described later.

  Next, operation | movement of the heat pump type hot-water supply apparatus mentioned above is demonstrated easily using FIG. The heat pump cycle 10 contains R744, which is a CO2 refrigerant. Note that the refrigerant is not limited to R744, but various refrigerants such as R32 and R410A can be selected. After the refrigerant is compressed by the compressor 15 to be in a high temperature and high pressure state, the water / refrigerant heat exchanger 16 heats the cold water sent from the lower part of the hot water storage vessel 21 by the circulating pump 22 for boiling, Instead, it radiates its own heat and performs heat exchange.

  Then, after passing through the expansion valve 17, the refrigerant reaches a low temperature and low pressure state, then receives heat from the external air sent by the blower fan 20 in the evaporator 18, and then flows into the compressor 15 again. .

  In the water / refrigerant heat exchanger 16, the tap water and the high-temperature refrigerant flow in opposite directions, and the high-temperature hot water heated by the refrigerant and having a high temperature is returned to the upper part of the hot water storage container 21. The hot water supply heat exchanger 24 circulates hot hot water and tap water in the hot water storage container 31 in directions opposite to each other, and the hot tap water heated by the hot hot water is supplied to the faucet plug and shower plug. Is done.

  At the time of hot water supply, hot water flows from the upper part of the hot water storage container 21 to the faucet plug or bathtub, or hot water flows from the hot water supply heat exchanger 24 to the faucet plug or shower plug. Tap water is supplied to Hot water and tap water are mixed at an inlet such as a faucet plug, and then flow out from the faucet plug (or shower plug).

  In the heat pump hot water supply apparatus as described above, the configuration of the conventional temperature buffer container 28 and its problems will be described.

  FIG. 8 shows a configuration of a conventional temperature buffer container 28. The temperature buffer container 28 includes a small-diameter inflow pipe 29, a large-diameter mixing pipe 30, and an outlet end portion 31. The inflow pipe 29 is inserted and arranged in the mixing pipe 30, and the joint portion 32 has a watertight structure by welding. An outlet end 31 is fixed to the outflow side of the mixing tube 29 by welding to form a watertight structure. Further, small holes 34 are formed in the side peripheral surface 33 in the axial direction of the inflow pipe, and a plurality of holes are provided at intervals in the axial direction.

  The hot hot water flowing in from the inflow pipe 29 is ejected radially outward from the small hole 34, and is stirred in the space between the inflow pipe 29 and the mixing pipe 30, mixed and cooled, and then the outlet end portion. It flows out from 31 directly to a faucet plug or a shower plug. Here, the inflow pipe 29, the mixing pipe 30, and the outlet end 31 are made of stainless steel, and each is joined by welding.

  As described above, the conventional temperature buffer container 28 is not sufficiently mixed with the hot water in the mixing pipe 30, and the flow of the hot water fed from the outlet end 31 is sufficiently cooled and the cooling is performed. It was a flow with "temperature unevenness" in which insufficient areas were mixed. Accordingly, users are required to supply hot water that is sufficiently mixed with little “temperature unevenness”.

  Although not directly related to the temperature of the hot water, the conventional temperature buffer container 28 is made of stainless steel, so the mixing pipe 30, the inlet pipe 29 and the outlet end 31 are joined by TIG welding or brazing. ing. For this reason, in addition to the material unit price, it had the secondary subject that a manufacturing unit price became high.

  In order to solve such a problem, the present embodiment proposes a novel temperature buffer container configuration that allows hot water to be sufficiently mixed in a mixing tube to discharge hot water with less “temperature unevenness”.

  The temperature buffer container according to the present embodiment has a cylindrical inflow pipe having a small hole on the side peripheral surface and a cylindrical outflow pipe having a small hole on the side peripheral surface facing each other, and the inner circumference of the large-diameter mixing pipe. The configuration is such that a mixed space is formed between the surface and the surface.

  According to this embodiment, hot water having a high temperature is ejected in a radial direction through a small hole formed in the side peripheral surface of the inflow pipe, and the hot water after being stirred and mixed in the mixing pipe is caused to flow to the outflow pipe side. However, since it flows into the outflow pipe from the radial direction through the small holes formed in the side peripheral surface of the outflow pipe, hot water with less “temperature unevenness” can be discharged from the outflow pipe.

  Hereinafter, the temperature buffer container according to the present embodiment will be described in detail with reference to the drawings. 2 and 3 show a temperature buffer container 40 according to the present embodiment, FIG. 2 shows its appearance, and FIG. 3 shows a cross section taken along a line AA and perpendicular to the paper surface.

  The temperature buffer container 40 is divided into two at the center, and includes an inflow side temperature buffer container 41 and an outflow side temperature buffer container 42. The inflow side temperature buffer container 41 includes an inflow side mixing tube 43 and an inflow tube 44. Similarly, the outflow side temperature buffer container 42 includes an outflow side mixing tube 45 and an outflow tube 46.

  The inflow side mixing tube 43, the inflow tube 44, the outflow side mixing tube 45, and the outflow tube 46 are each made of synthetic resin, and the fixing surfaces of the inflow side mixing tube 43 and the outflow side mixing tube 45 are welded to each other. Alternatively, they are integrated by bonding or screw engagement. In this embodiment, polyphenylene sulfide resin (PPS resin) is used as the synthetic resin. This PPS resin is an engineering plastic, has excellent heat resistance, can be used for a long time at a high temperature, and has excellent flame retardancy, tensile strength, and bending strength. In this embodiment, the inflow side mixing tube 43 and the outflow side mixing tube 45 are integrated by welding. The configuration of this welded portion will be described later.

  A connection end 47 is integrally formed at one end of the inflow side mixing tube 43, and the inflow tube 44 is fixed inside the connection end 47. In this case, the inflow pipe 44 may be fitted into the fitting portion of the connection end 47 with a predetermined pushing force, or the inflow pipe 44 may be bonded and fixed in advance to the inside of the connection end 47 with an adhesive. It is.

  Similarly, a connection end 48 is integrally formed at one end of the outflow side mixing tube 44, and the outflow tube 46 is fixed inside the connection end 48. Also in this case, the outflow pipe 46 may be inserted into the fitting portion of the connection end 48 with a predetermined pushing force, or the outflow pipe 46 may be bonded and fixed in advance to the inside of the connection end 48 with an adhesive. Is.

  Therefore, before the inflow side mixing tube 43 and the outflow side mixing tube 45 are integrated, the inflow tube 44 is assembled and integrated with the inflow side mixing tube 43. Similarly, the outflow side tube 46 is connected to the outflow side mixing tube 45. Are assembled and integrated.

  As can be seen from the drawing, the inflow side temperature buffer container 41 and the outflow side temperature buffer container 42 have the same shape, and therefore there is no restriction on the mounting direction at the time of mounting. For this reason, it can be attached using either of the connection end portions 47 and 48, and there is an effect that the attaching operation becomes easy. In addition, since the inflow side mixing tube 43 and the outflow side mixing tube 45, and the outflow tube 46 and the inflow tube 44 have the same shape, the effect of suppressing the product unit price by mass production can be expected.

  In addition, an inclined surface 49 is formed on a surface from the outermost peripheral surface of the inflow side mixing tube 43 toward the connection end portion 47 of the inflow side mixing tube 43, and the hot water sprayed from the inflow tube 44 is supplied to the shaft of the inflow tube 44. The direction is changed toward the direction. As a result, the flow of hot water in the inflow side mixing tube 43 is made smooth, and stirring and mixing of hot water spouted in the radial direction of the wake is promoted.

  Similarly, an inclined surface 50 is formed on the surface from the outermost peripheral surface of the outflow side mixing tube 45 toward the connection end portion 48 of the outflow side mixing tube 45, and the hot water flowing through the outflow side mixing tube 45 is discharged from the outflow side mixing tube 45. The direction is changed in the radial direction of the tube 46. Accordingly, the warm water is guided from the inflow side mixing pipe 45 to the outflow pipe 46 side to facilitate the inflow.

  In the state where the inflow side mixing tube 43 and the outflow side mixing tube 45 are integrated, the closed end surface 51 of the inflow tube 44 and the closed end surface 52 of the outflow tube 46 are in contact with each other, or a slight gap is formed. Facing each other. As a result, useless gaps are not formed between the inflow pipe 44 and the front end surfaces 51 and 52 of the outflow pipe 45, and warm water can be smoothly flowed from the inflow side mixing pipe 43 to the outflow side mixing pipe 45. .

  Between the inflow side mixing pipe 43 and the outflow side mixing pipe 45 and between the inflow pipe 44 and the outflow pipe 46, a mixing space S for stirring, mixing, and cooling the hot water is formed. It is formed between the inner peripheral surfaces of the inflow side mixing tube 43 and the outflow side mixing tube 45 and the outer peripheral surfaces of the inflow tube 44 and the outflow tube 46. The volume of the mixing space S needs to be appropriately determined in relation to the flow rate of the flowing hot water and the cooling efficiency. In this embodiment, the volume is set to about 300 cc to 400 cc. Therefore, based on this, the lengths and diameters of the mixing tubes 43 and 45 and the diameters of the inflow tube 44 and the outflow tube 46 may be determined.

  Next, the first small hole 53A, the second small hole 53B, the third small hole 53C, and the fourth small hole 53D are spaced from each other on the side peripheral surface of the inflow pipe 44 along the traveling direction of the hot water. Is provided. The front end surface 51 has a closed bag shape and is not in communication with the mixing space S. And the diameter of each small hole has the relationship of 1st small hole 53A> 2nd small hole 53B> 3rd small hole 53C> 4th small hole 53D. The reason why the diameter (= cross-sectional area) of each small hole is thus reduced along the flow of hot water is as follows.

  First, the reason why the first small hole 53A on the side close to the connection end 47 is enlarged is that warm water flows into the inflow side mixing pipe 44 and at the same time a large amount of hot water is blown into the mixing space S to promote mixing. This is for the purpose of improving the cooling effect by blowing out the hot water at the front half side of the inflow side mixing tube 44.

  The hot water sprayed from the first small hole 53A is changed in the axial direction of the inflow pipe 44 by the inclined surface 49 formed on the surface from the outermost peripheral surface of the inflow side mixing pipe 43 toward the connection end 47. I try to let them. For this reason, the arrangement position of the first small hole 53A is determined in the region where the inclined surface 49 is formed. Thereby, while making the flow of the warm water in the inflow side mixing pipe 43 smooth, it contributes also to stirring and mixing.

  The reason for reducing the size of the fourth small hole 53D on the side close to the tip surface 51 is to increase the speed at which the warm water ejected from the inflow pipe 44 is increased, thereby further improving the stirring and mixing of the warm water existing in the mixing space S. is there. The second small hole 53B and the third small hole 53C in the middle have the action and effect between the first small hole 53A and the fourth small hole 53D.

  Next, the first small hole 54A, the second small hole 54B, the third small hole 54C, and the fourth small hole 54D are spaced from each other on the side peripheral surface of the outflow pipe 46 along the direction of travel of the hot water. Is provided. The front end surface 52 has a closed bag shape and is not in communication with the mixing space S. And the diameter of each small hole has the relationship of 1st small hole 54A <2nd small hole 54B <3rd small hole 54C <4th small hole 54D. The reason why the diameter (= cross-sectional area) of each small hole is increased along the flow of hot water in this way is as follows.

  First, the reason why the fourth small hole 53D on the side close to the connection end portion 48 is enlarged is that a large amount of hot water flows out into the outflow pipe 46 from the latter half side of the outflow side mixing pipe 45 (mixing space S). That is, the second half side of the outflow side mixing tube 45 is sufficiently mixed with hot water in the mixing space S and cooled.

  The warm water flowing through the outflow side mixing pipe 45 is directed in the radial direction of the outflow pipe 46 by the inclined surface 50 formed on the surface from the outermost peripheral surface of the outflow side mixing pipe 45 toward the connection end 48. I try to convert it. For this reason, the arrangement position of the fourth small hole 54D is determined in the region where the inclined surface 50 is formed. Accordingly, the warm water is guided from the inflow side mixing tube 45 to the outflow tube 46 to facilitate the inflow.

  The reason why the first small hole 54A on the side close to the front end surface 52 is made small is that the outflow amount of hot water having a high temperature flowing from the inflow side mixing pipe 44 is reduced and a large amount of hot water is passed through the outflow side mixing pipe 45. This is for the second half. As a result, the hot water whose mixing has been further promoted can be discharged. The second small hole 54B and the third small hole 54C in the middle have the action and effect between the first small hole 54A and the fourth small hole 54D.

  Further, as shown in FIG. 3, the opening directions of the small holes 53 </ b> A to 53 </ b> D formed in the inflow pipe 44 are formed in two rows at symmetrical positions perpendicular to the paper surface. The opening directions of the formed small holes 54A to 54D are formed in two rows parallel to the symmetric position with respect to the paper surface.

  That is, the opening direction of the small holes 53A to 53D formed in the inflow pipe 44 and the opening direction of the small holes 54A to 54D formed in the outflow pipe 46 on the surface orthogonal to the central axis of the inflow pipe 44 and the outflow pipe 46 are Each of them is formed by shifting at an angle of 90 °. If formed in this way, even if hot water having a high temperature ejected from the inflow pipe 44 flows into the outflow side mixing pipe 45, the positions of the small holes 54 </ b> A to 54 </ b> D of the outflow pipe 46 are shifted by 90 °. It becomes difficult for hot water to flow in, and “temperature unevenness” does not easily occur in the hot water.

  The small holes 53A to 53D are formed in two rows at 180 ° positions on the side peripheral surface of the inflow pipe 44, and the small holes 54A to 54D are also formed in two rows at 180 ° positions on the side peripheral surface of the inflow pipe 46. It is also possible to set the number of rows to 3 ° to 120 ° position, or to set the number of rows to 4 ° and 90 ° position. Stirring and mixing can be further promoted by using such a plurality of rows.

  When the temperature buffer container 40 having the above-described configuration is provided in the hot water supply pipe 26 of the hot water supply heat exchanger 24, hot water having a high temperature from the hot water supply heat exchanger 24 flows into the temperature buffer container 40 from the connection end 47. To do. The inflowing hot water passes through the inflow pipe 44 and is ejected from the first small holes 53 </ b> A to 53 </ b> D into the mixing space S formed in the inflow side mixing pipe 43. The behavior of the hot water ejected from the first small holes 53A to 53D is as described above.

  Then, the hot water that has been stirred, mixed, and whose temperature has been lowered reaches the outflow side mixing tube 45 while traveling through the mixing space S, and enters the first small holes 54A to 54D formed in the outflow tube 46 from the outflow side mixing tube 45. Leaked. The behavior of the hot water flowing out from the first small holes 54A to 54D is as described above. By using such a temperature buffer container 40, hot water with less “temperature unevenness” can be discharged from the outflow pipe.

  Next, the structure of the fixed surfaces of the inflow side mixing tube 43 and the outflow side mixing tube 45 will be described with reference to FIGS. 4A and 4B. A pocket portion 57 is formed on the end surface of the joining end surface 55 of the inflow side mixing tube 43, and similarly, a pocket portion 58 is formed on the end surface of the joining end surface 56 of the outflow side mixing tube 45. These pocket portions 57 and 58 have shapes that coincide with each other at the joining end surfaces 55 and 56 of the inflow side mixing tube 43 and the outflow side mixing tube 45.

  When the joining end surface 55 of the inflow side mixing tube 43 and the joining end surface 56 of the outflow side mixing tube 45 are welded, the molten synthetic resin of each of the joining end surfaces 55 and 56 becomes “burrs”, and the inflow side mixing tube 43. And may protrude inside the outflow side mixing tube 45. This “burr” may flow out with warm water for some reason, which is not preferable from the viewpoint of product quality.

  Therefore, in the present embodiment, excess synthetic resin melted by the melted portion 59 generated when the joining end surface 55 of the inflow side mixing tube 43 and the joining end surface 56 of the outflow side mixing tube 45 are welded is accommodated in the pocket portions 57 and 58. This suppresses the occurrence of “burrs”. Therefore, the occurrence of “burrs” prevents the “burrs” from flowing out with warm water for some reason, which is preferable from the viewpoint of product quality.

  Here, in the embodiment described above, the cross section of the inflow side mixing tube 43, the inflow tube 44, the outflow side mixing tube 45, and the outflow tube 46 is annular. However, the present invention is not limited to this, and may have a polygonal cross section (for example, a triangle, a quadrangle, a hexagon, etc.).

  In this embodiment, the inflow pipe 44 and the outflow pipe 46 are configured separately and are fixed to the inflow side mixing pipe 43 and the outflow side mixing pipe 45, respectively. However, the inflow pipe 44 and the outflow pipe 46 are integrated. It is also possible to configure and fix to the inflow side mixing tube 43 and the outflow side mixing tube 45. In this case, the front end surfaces 51 and 52 of the inflow pipe 44 and the outflow pipe 46 are combined into one.

  As described above, in this embodiment, a cylindrical inflow pipe having a small hole on the side peripheral surface and a cylindrical outflow pipe having a small hole on the side peripheral surface are mixed with a large diameter so as to face each other. This proposes a temperature buffering container having a configuration in which a space is formed between the inner peripheral wall surface and the inner wall surface.

  According to this embodiment, hot water having a high temperature is ejected in a radial direction through a small hole formed in the side peripheral surface of the inflow pipe, and the hot water after being stirred and mixed in the mixing pipe is caused to flow to the outflow pipe side. However, since it flows into the outflow pipe from the radial direction through the small holes formed in the side peripheral surface of the outflow pipe, hot water with less “temperature unevenness” can be discharged from the outflow pipe.

  Moreover, since the inflow side mixing pipe 43, the inflow pipe 44, the outflow side mixing pipe 45, and the outflow pipe 46 are each made of a synthetic resin, the material price and manufacturing are higher than those using conventional stainless steel. The price can be kept low and the product competitiveness can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. Compared with the first embodiment, this embodiment forms a small hole in the front end surface 51 of the inflow pipe 44 and the front end surface 52 of the outflow pipe 46, and the front end surface of the outflow pipe 46 extends from the front end surface 51 of the inflow pipe 44. The difference is that the hot water sprays directly to the outflow pipe 46 after passing through 52.

  Here, since the same reference numbers as those described in the first embodiment are the same components or components having the same functions, the description thereof will be omitted. Also, description of the same operations and effects as those described in the first embodiment will be omitted. Furthermore, since the additional description demonstrated in 1st Embodiment is also the same, description is abbreviate | omitted.

  In FIG. 5, a small hole 60 is formed in the distal end surface 51 of the inflow tube 44, and similarly, a small hole 61 is formed in the distal end surface 52 of the inflow tube 46. These small holes 60 and 61 are formed in the same diameter, and the central axis is the same. Therefore, the projection shapes of the small holes 60 and 61 are overlapped. For this reason, the hot water passes through the small hole 61 on the front end surface 52 of the outflow pipe 46 from the small hole 60 on the front end surface 51 of the inflow pipe 44, and the hot water is directly blown out to the outflow pipe 46.

  Further, the flow rate of the warm water passing through the small holes 60 and 61 is smaller than the flow rate of the warm water passing through the small holes 53A to 53D of the inflow pipe 44 and the flow rate of the warm water passing through the small holes 54A to 54D of the outflow pipe 46. It is. Compared with the hot water from the inflow pipe 44 through the mixing space S to the outflow pipe 46, the warm water from the small hole 60 of the inflow pipe 44 to the outflow pipe 46 through the small hole 61 of the outflow pipe 46 is faster. To reach.

  Here, before the start of hot water supply, the temperature buffer container 40 is filled with cooled hot water. Immediately after the start of hot water supply, in the case of only the path from the inflow pipe 44 through the mixing space S to the outflow pipe 46, a part of the cooled hot water in the outflow side mixing pipe 45 and the outflow pipe 46 is mixed with hot water. It is pushed out to the faucet. On the other hand, when a path that flows from the small hole 60 of the inflow pipe 44 to the small hole 61 of the outflow pipe 46 is also provided immediately after the start of hot water supply, hot hot water enters the outflow pipe 46 directly from the inflow pipe 44. . Therefore, in the outflow pipe 46, hot hot water that has entered directly from the inflow pipe 44 and cooled hot water that has entered from the outflow side mixing pipe 45 can be mixed to obtain hot water of an appropriate temperature.

  Furthermore, in order to obtain hot water having an appropriate temperature, it is necessary to increase the ratio of the cooled warm water that enters the outflow pipe 46 from the small holes 54A to 54D provided on the side surface of the outflow pipe 46 in particular. For this reason, the flow rate of warm water passing through the small holes 53A to 53D of the inflow pipe 44 and the flow rate of warm water passing through the small holes 54A to 54D of the inflow pipe 46 are larger than the flow rate of hot water passing through the small holes 60 and 61. It is what you are doing.

  With the configuration as described above, it becomes possible to generate hot water at an appropriate temperature in the outflow pipe 46 at an earlier time than in the case of only the path from the inflow pipe 44 to the outflow pipe 46 through the mixing space S, and a faucet plug or shower Temperature change at the stopper can be more relaxed. Moreover, the utilization efficiency of the cooled warm water in the temperature buffer container 40 improves. As a result, the volume of the temperature buffer container can be reduced.

  Next, a third embodiment of the present invention will be described with reference to FIGS. 6, 7A, and 7B. This embodiment is different from the first embodiment in that the opening direction of the small holes 53A to 53D formed on the side peripheral surface of the inflow pipe 44 is changed to promote the swirling motion of the hot water. .

  In FIG. 6, the inflow pipe 44 is shown, and FIG. 7A shows the BB cross section of FIG. In the first embodiment, the opening directions of the small holes 53 </ b> A to 53 </ b> D are set to radiate through the central axis of the inflow pipe 44, but in this embodiment, the inflow pipe is a plane orthogonal to the central axis of the inflow pipe 44. It is set to extend in a direction not passing through the central axis of 44. Therefore, the warm water ejected from the small holes 53 </ b> A to 53 </ b> D can move along the circular inner peripheral surface of the inflow side mixing tube 43 to promote the stirring and mixing of the warm water.

  Moreover, in FIG. 7B, the surface orthogonal to the central axis of the inflow pipe 44 does not pass through the central axis of the inflow pipe 44, and the hot water jetted from the small holes 53A to 53D has a directing direction. Therefore, the hot water ejected from the small holes 53A to 53D can move along the circular inner peripheral surface of the inflow side mixing tube 43 to further promote the stirring and mixing of the hot water.

  The configuration described above is the small holes 53A to 53D formed in the inflow pipe 44, but the same configuration can be adopted in the small holes 54A to 54D of the outflow pipe 46. In addition, if the small holes 54A to 54D having the opposite direction to the small holes 53A to 53D formed in the inflow pipe 44 are formed, an effect of increasing the amount of hot water flowing into the outflow pipe 46 can be expected. .

  As described above, according to the present invention, in the temperature buffer container, a cylindrical inflow pipe having a small hole on the side peripheral surface and a cylindrical outflow pipe having a small hole on the side peripheral surface face each other. It arrange | positioned so that a mixing space may be formed between inner peripheral surfaces.

  According to this, hot water having a high temperature is ejected in a radial direction through a small hole formed in the side peripheral surface of the inflow pipe, and the hot water after being stirred and mixed in the mixing pipe flows out while flowing to the outflow pipe side. Since it flows into the outflow pipe from the radial direction through a small hole formed in the side peripheral surface of the pipe, hot water with less “temperature unevenness” can be discharged from the outflow pipe.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Heat pump cycle, 11 ... Heat pump unit, 12 ... Water side cycle, 15 ... Compressor, 16 ... Water / refrigerant heat exchanger, 17 ... Expansion valve, 18 ... Evaporator, 20 ... Blower fan, 21 ... Hot water storage container, 22 ... Boiling circulation pump, 4 ... Hot water supply heat exchanger, 25 ... Water pipe, 26, 27 ... Hot water piping, 40 ... Temperature buffer container, 41 ... Inflow side temperature buffer container, 42 ... Outflow side temperature buffer container, 43 Inflow side mixing pipe, 44 ... Inflow pipe, 45 ... Outflow side mixing pipe, 46 ... Outflow pipe, 47 ... Connection end, 48 ... Connection end, 49 ... Inclined surface, 50 ... Inclined surface, 51 ... End surface, 52 ... Front end surface, 53A-53D ... Small hole, 54A-54D ... Small hole, 55, 56 ... Joint end surface, 57, 58 ... Pocket part, 60, 61 ... Small hole on the front end surface.

Claims (5)

A hot water storage container for storing hot water obtained by exchanging heat between tap water and a high-temperature refrigerant by a heat pump, and a hot water supply heat exchanger for generating hot water by exchanging heat between the hot water stored in the hot water storage container and tap water. A hot water supply pipe for connecting a hot water source of the hot water storage container or the hot water supply heat exchanger and a faucet plug, and the like, provided in the middle of the hot water supply pipe, one connected to the hot water source, the other connected to the faucet plug, etc. In a heat pump type hot water supply apparatus equipped with a temperature buffer container connected to
The temperature buffer vessel includes a cylindrical resin inlet tube tip is closed and has a small hole in the side peripheral surface, a cylindrical resin outflow tube tip is closed and has a small hole in the side peripheral surface An inflow side connection end connected to the hot water source at one end, and a resin inflow side mixing tube in which the resin inflow pipe is fixed inside the inflow side connection end; An outflow side connection end connected to the faucet plug or the like is integrally formed, and the resin outflow side mixing tube to which the resin outflow pipe is fixed inside the outflow side connection end is provided with the resin The other end of the inflow side mixing tube and the other end of the resin outflow side mixing tube are integrated with each other at a fixed surface to form a resin mixing tube, and the resin inflow tube and the resin outflow tube are And a mixing space is formed between the resin mixing tube and the inner peripheral surface of the resin mixing tube. Pump type hot water supply apparatus. A hot water storage container for storing hot water obtained by exchanging heat between tap water and a high-temperature refrigerant by a heat pump, and a hot water supply heat exchanger for generating hot water by exchanging heat between the hot water stored in the hot water storage container and tap water. A hot water supply pipe for connecting a hot water source of the hot water storage container or the hot water supply heat exchanger and a faucet plug, and the like, provided in the middle of the hot water supply pipe, one connected to the hot water source, the other connected to the faucet plug, etc. In a heat pump type hot water supply apparatus equipped with a temperature buffer container connected to
The temperature buffer container has a cylindrical resin inflow pipe having a small hole on the side peripheral surface and closed at the tip, and a cylindrical resin outflow pipe having a small hole on the side peripheral surface and closed at the tip. An inflow side connection end connected to the hot water source at one end, and a resin inflow side mixing tube in which the resin inflow pipe is fixed inside the inflow side connection end; An outflow side connection end connected to the faucet plug or the like is integrally formed, and the resin outflow side mixing tube to which the resin outflow pipe is fixed inside the outflow side connection end is provided with the resin The other end of the inflow side mixing tube and the other end of the resin outflow side mixing tube are integrated with each other on a fixed surface to form a resin mixing tube, and the closed end surface of the resin inflow tube or contact with occluded distal end surface of the resin outlet pipe, the tree opposite facing with a gap Disposed manufactured mixing tube, moreover heat pump type hot water supply apparatus characterized by being arranged mixing space formed to between the inner peripheral surface of the resin mixing tube. A hot water storage container for storing hot water obtained by exchanging heat between tap water and a high-temperature refrigerant by a heat pump, and a hot water supply heat exchanger for generating hot water by exchanging heat between the hot water stored in the hot water storage container and tap water. A hot water supply pipe for connecting a hot water source of the hot water storage container or the hot water supply heat exchanger and a faucet plug, and the like, provided in the middle of the hot water supply pipe, one connected to the hot water source, the other connected to the faucet plug, etc. In a heat pump type hot water supply apparatus equipped with a temperature buffer container connected to
The temperature buffer container has a cylindrical resin inflow pipe having a small hole on the side peripheral surface and also having a small hole on the front end, and a small hole on the side peripheral surface and connected to the front end small hole. A cylindrical resin outflow pipe having a distal end side small hole and an inflow side connection end connected to the hot water source at one end are integrally formed, and the resin inflow pipe is formed inside the inflow side connection end. The resin inflow side mixing tube is fixed to one end and the outflow side connection end connected to the faucet plug or the like is integrally formed at one end, and the resin outflow tube is fixed inside the outflow side connection end. And the other end of the resin inflow side mixing tube and the other end of the resin outflow side mixing tube are integrated on a fixed surface to form a resin mixing tube. And the flow rate of the hot water passing through the small holes on the both ends is on the side peripheral surfaces of the resin inflow pipe and the resin outflow pipe. The flow rate is set to be less than the flow rate passing through the small hole, and the front end surface of the resin inflow pipe and the front end surface of the resin outflow pipe are in contact with each other or face each other with a gap therebetween to face the resin mixing. A heat pump type hot water supply apparatus, which is arranged in a pipe and is arranged so as to form a mixing space with the inner peripheral surface of the resin mixing pipe. In the heat pump type hot water supply apparatus according to any one of claims 1 to 3,
A plurality of the small holes provided in the side peripheral surfaces of the resin inflow pipe and the resin outflow pipe are provided along an axial direction of the resin inflow pipe and the resin outflow pipe, and the resin The small hole provided in the side peripheral surface of the inflow pipe made of a material has a cross-sectional area that decreases along the traveling direction of hot water, and the small hole provided in the side peripheral surface of the resin outflow pipe is made of hot water. A heat pump type hot water supply apparatus, characterized in that the cross-sectional area increases along the direction of travel. In the heat pump type hot water supply apparatus according to any one of claims 1 to 3,
At least the opening direction of the small hole provided in the side peripheral surface of the resin inflow pipe is a plane orthogonal to the central axis of the resin inflow pipe, and does not pass through the central axis of the resin inflow pipe. A heat pump type hot water supply apparatus characterized by being set.

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