JP5790971B2 - Hot water system - Google Patents

Description

  The present invention relates to an instant hot water supply system.

  In commercial facilities such as hotels and public baths, hot water supply apparatuses having a configuration in which hot water flowing through a heat exchanger is heated by high-temperature combustion gas generated in a combustion section are widely used. As one form of this type of water heater, it is composed of a general-purpose water heater main body (heat source section) that incorporates a combustion section, a heat exchanger, and the like, and a pipe that connects the water heater main body to a currant and the like. There is something. That is, this hot water supply apparatus is installed with a unitized water heater main body in a predetermined position at a construction site and connected from the water heater main body to a currant or the like by piping formed in accordance with the site. .

  By the way, in a commercial facility, since the building itself is larger than a home and the water heater main body is installed in the basement or the like, the distance from the water heater main body to the karan or the like often becomes long. That is, it takes a considerable amount of time (at least several tens of seconds) for hot water heated by the water heater body to reach a currant or the like. For this reason, if the hot water is heated after a hot water request (for example, operation of a currant or the like) is generated, a considerable time delay occurs until hot water having a predetermined temperature is discharged. Therefore, in commercial facilities, there is a hot water supply system (hereinafter also referred to as an instant hot water supply system) having an immediate hot water function that can generate hot water at a temperature set by a remote controller or the like in advance when the hot water is discharged. It has been adopted.

  This type of instant hot water supply system is provided with a circulation circuit for circulating hot water in addition to the structure of a normal hot water supply device, and the hot water is maintained at a set temperature in the circulation circuit until there is a demand for hot water. It is configured to be able to wait. For example, Patent Document 1 discloses the technique.

  However, such an instant hot water supply system is troublesome that the pumps and expansion tanks that are indispensable for forming a circulation circuit must be selected for each construction site. There was a trouble in the work that each of these devices had to be installed in the circulation circuit.

  Therefore, in recent years, a pump unit in which devices such as a pump and an expansion tank are unitized in one housing in advance has been widely used in the market for the purpose of improving the workability of the instant hot water supply system. That is, if such a pump unit is employed, the troublesomeness of selecting a pump, an expansion tank, and the like at the construction site can be eliminated, and extra labor in construction can be saved.

JP 11-159869 A

  However, since the conventional pump unit is unitized by paying attention only to solving the above-mentioned dissatisfaction, it does not take into consideration the labor of piping work for the pump unit. That is, in construction sites, standardized products are often used for piping connected to the water heater main body from the viewpoint of work efficiency, but this type of pump unit uses standardized piping, etc. There is no configuration until use. For this reason, in piping work for the pump unit, piping is still formed on site, and further improvement in work efficiency is desired.

  In addition, the conventional pump unit is not in a state where the pump, expansion tank, etc. are exposed compared to before the unitization, so a clean appearance is ensured, but it is better from the viewpoint of unity of the entire hot water supply system. Further improvement is desired.

  Therefore, in the present invention, in view of the problems of the prior art, it is an object to provide a hot water supply system capable of further improving the workability and unifying the appearance of the water heater body (heat source part) and the pump unit. .

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a hot water source having a predetermined temperature in a pipe between a heat source part for heating hot water and a pump unit having a circulation pump, which is connected by a pipe. Is a hot water supply system having a function of draining hot water from the retained hot water upon demand, and the heat source section and the pump unit each have a casing, and each casing has substantially the same dimensions. A plurality of pipe connection portions are provided on the same direction surface with reference to a normal installation state, and at least one of the pipe connection portions of the heat source part and at least one of the pipe connection parts of the pump unit. One is a hot water supply system having one of the features that the positions are substantially the same.

Here, as described above, most of the piping up to Karan and the like is plumbed according to the construction site. In particular, in a hot water supply system in a commercial facility, a branch pipe branched from a main pipe is connected to a heat source unit. For this reason, work efficiency can be improved if pipes and the like standardized in advance (hereinafter referred to as standard pipes and the like) can be used for the branch pipes and the like connected to the heat source section. In particular, in commercial facilities such as hotels and public baths that require large-capacity hot-water supply capacity, it is usually a general-purpose product that connects multiple heat source parts with the same structure (at least the position of the pipe connection part) to connect hot-water supply capacity. Therefore, it is very convenient if standard piping is available.
The “standard piping” referred to here is not an JIS standard or the like but an in-house standard in which the pipe length determined based on the hot water supply capacity, the pipe diameter, or the like is a fixed standard.
Therefore, in the present invention, the housing of the heat source unit and the housing of the pump unit are provided with a plurality of pipe connection parts on the same direction surface based on the normal installation state, and among the pipe connection parts of the heat source unit, And at least one of the pipe connections of the pump unit are arranged at substantially the same position. That is, since the same standard piping used when connecting a plurality of heat source sections can be used, the work efficiency of the piping work is improved.
In the hot water supply system of the present invention, the heat source unit and the pump unit each have a casing, and the casings are set to have substantially the same dimensions. Therefore, the heat source unit and the pump unit are unified in appearance, and the design can be improved.
Therefore, according to the hot water supply system of the present invention, higher workability can be achieved as compared with the case where a conventional pump unit is employed, and the heat source part and the pump unit can be unified in appearance.

Here, in a commercial facility, as a means for fixing the heat source unit at a predetermined position, a gantry standardized to fit the dimensions of the heat source unit may be employed. And when connecting a some heat source part as mentioned above, the same number of said mounts are prepared as the number of heat source parts, and these mounts are connected integrally. In other words, by using such a gantry, it is possible to install the heat source sections so as to be aligned at equal intervals without matching the intervals between the heat source portions. And if this is utilized, since the position where the branch pipe in the main pipe is connected can be set in advance, for example, the main pipe itself can use a standardized pipe. Thereby, the improvement of the further operation efficiency can be aimed at.
Therefore, in the invention described in claim 1 , the hot water supply system is characterized in that the heat source unit and the pump unit are fixed to the same base.

  According to this configuration, since the heat source unit and the pump unit are fixed on the same base, further workability can be improved. Moreover, since the whole unity after construction further increases, it is possible to provide a hot water supply system with high design.

The invention according to claim 2, the heat source unit is located in the heat source unit having a combustion section for generating a combustion gas by burning a fuel, and a secondary heat exchanger for recovering latent heat of the main combustion gas In the heat source section, condensed water generated by latent heat recovery is discharged through any of the pipe connection sections, and the pump unit has an expansion tank, and the hot water overflowing from the flow path communicating with the expansion tank is It is a hot water supply system characterized by being discharged through one of the pipe connections.

  According to such a configuration, even when the heat source unit is provided with a latent heat recovery type secondary heat exchanger, the pump unit is provided with an expansion tank, and both the heat source unit and the pump unit are drained to the outside. The positions of the pipe connection portions provided in both cases can be made substantially the same. According to this, a common standard pipe used for drainage can be used.

The inventions described in claims 4 and 5 include at least main pipes for water supply, hot water supply, and drainage, and branching branches from any one of the main pipes to each pipe connection part in the heat source part and the pump unit. Piping is connected, and among the pipe connection parts of the heat source part and the pump unit, the pipe connection part arranged at substantially the same position is connected to a branch pipe branched from the same main pipe. The hot water supply system is one of the features.

  According to such a configuration, the position of the pipe connection part of the heat source unit and the pump unit is adjusted to substantially the same position for each of water supply, hot water supply, and drainage. For example, in the case of connecting a plurality of heat source parts Since the same standard pipe can be connected to the pipe connection part at the same position, even between adjacent heat source parts, or between adjacent heat source parts and pump units, further improvement in work efficiency is achieved. be able to. In other words, since only the same standard pipe or the like can be connected to the pipe connection part at the same position in the heat source part and the pump unit, no erroneous pipe connection occurs.

  In the hot water supply system of the present invention, the dimensions of the housing of the heat source part and the pump unit are made the same, a pipe connection part is provided on the same direction surface based on the normal installation state, and at least one of the pipe connection parts of the heat source part Since at least one of the pipe connection portions of the pump unit is disposed at substantially the same position, the efficiency of work at the construction site can be improved particularly when using standardized piping or the like. Moreover, in this invention, since there exists unity as a whole, high designability can be aimed at.

It is an operation principle figure showing the hot-water supply system concerning the embodiment of the present invention. It is a front view which shows a part of actual hot-water supply system. It is the figure which paid its attention to the housing | casing of the water heater main body of FIG. 2, (a) It is a perspective view, (b) It is the top view seen from the downward direction (a quadrant with a dashed-two dotted line). It is the top view seen from the lower part which paid its attention to the housing | casing of the water heater main body of FIG. 2, and is the figure divided into 16 equally by the dashed-two dotted line. It is the top view seen from the bottom which paid its attention to the housing | casing of the water heater main body of FIG. 2, and is the figure which made the intersection by a dashed-two dotted line the reference point (center). It is the figure which paid its attention to the housing | casing of the pump unit of FIG. 2, (a) It is a perspective view, (b) It is the top view seen from the downward direction. It is the top view seen from the lower part which paid its attention to the housing | casing of the pump unit of FIG. 2, and is the figure divided into 16 equally by the dashed-two dotted line. It is the top view seen from the bottom which paid its attention to the housing | casing of the pump unit of FIG. 2, and is the figure which made the intersection by a dashed-two dotted line the reference point (center). It is a conceptual diagram which shows the flow of the hot water at the time of the hot water supply operation of the hot water supply system of FIG. It is a conceptual diagram which shows the flow of the hot water at the time of the hot water operation of the hot water supply system of FIG. It is a perspective view which shows a stand alone. It is a perspective view which shows a connection mount frame (equivalent to 2 stand units). It is a perspective view which shows the connection mount frame employ | adopted as the hot water supply system of FIG. It is a side view which shows the actual piping of the hot-water supply system of FIG. It is a perspective view which shows the cover member which covers the lower stage side of the connection stand of FIG.

Next, the hot water supply system 1 according to the embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, a hot water supply system 1 according to the present embodiment includes a plurality of (two in the present embodiment) water heater body (heat source unit) 2, circulation pumps 13, 14, and the like. 3 and these are connected using piping or the like. The hot water supply system 1 has a control device 50, and the control device 50 is a system in which the plurality of hot water heater main bodies 2 and the pump units 3 are collectively controlled.
The operation of the hot water supply system 1 according to the present invention is the same as that of a known technique, and the characteristic configuration is in the structure. Therefore, the description of the operation will be omitted below, and the description will be made focusing on the structure.

First, description will be made by paying attention to main components in the hot water supply system 1.
The water heater main body 2 is the same as that known in the art, and in this embodiment, the two water heaters have the same function and ability. Specifically, the water heater main body 2 includes a heat source housing 5, and a combustion device 8 that burns fuel gas in the heat source housing 5 and a controller 51 that controls the combustion device 8 and the like are built in. Has been.

As shown in FIG. 3, the heat source housing 5 includes a housing body 5a having one surface opened and a lid 5b that covers an open portion of the housing body 5a.
The casing body 5a is provided with a plurality of pipe joints 40, 41, and 42 on the bottom surface side (in the present embodiment, paying attention to three types for water entry, hot water discharge, and drainage) on the basis of a normal installation state. . That is, as shown in FIG. 3 (b), the housing body 5a is provided with a water inlet pipe joint 40 on the bottom surface, slightly below the center and on the right, with reference to the two-dot chain line. The hot water piping joint 41 is disposed on the left side, and the drainage piping joint 42 is disposed on the upper left side. The casing body 5a is also provided with a gas pipe joint and the like. However, since the configuration is not particularly related to the present invention, the description thereof is omitted.

  Specifically, the positions of the pipe joints 40 to 42 will be described. As shown in FIG. 3B, the bottom surface of the housing body 5a is divided into four equal parts by a double-dotted chain line passing through the center of the bottom surface. Among these areas, the pipe joints 40 to 42 are arranged in the upper left area A and the lower right area B. That is, the drainage pipe joint 42 and the hot water pipe joint 41 are arranged in the upper left area A, and the incoming pipe joint 40 is arranged in the lower right area B.

  More specifically, as shown in FIG. 4, the drainage pipe joint 42 is arranged in the uppermost and leftmost region Aa among the regions equally divided by the two-dot chain line, and two steps from the top. The hot water piping joint 41 is arranged in the second area Ab from the left and the left, and the incoming water pipe is supplied to the third area Ba from the top and the third from the left or the second from the bottom and the second from the right. A joint 40 is arranged.

From another viewpoint, as shown in FIG. 5, the positions of the pipe joints 40 to 42 are based on the center C of the bottom surface (intersection formed by a two-dot chain line) C. The distance ta in the right direction and the distance tb in the downward direction, the outlet pipe joint 41 is the distance tc in the left direction and the distance td in the upward direction, and the drain pipe joint 42 is the distance te in the left direction and the upward direction Is at a distance tf.
On the other hand, the lid 5b is provided with an air supply opening 38 on the lower side and an exhaust opening 39 on the upper side with reference to a normal installation state.

As shown in FIG. 1, the combustion device 8 includes a combustion unit 9, a heat exchange unit 11 that recovers thermal energy of combustion gas generated by combustion in the combustion unit 9 and heats hot water, and a combustion device 8. And a blower 10 for supplying air.
The combustion unit 9 is connected to a fuel system (not shown), and is composed of a plurality of burners 12 that burn fuel gas supplied from the fuel system (not shown).
The heat exchanging unit 11 is mainly located on the downstream side in the flow direction of the combustion gas from the primary heat exchanger 15 in which the sensible heat is recovered and the hot water is heated, and the water vapor contained in the combustion gas It has a secondary heat exchanger 16 that mainly recovers latent heat and heats hot water. In the secondary heat exchanger 16, condensed water (so-called drain) is generated during the recovery of latent heat, and therefore, the drain generated in the secondary heat exchanger 16 is drained to the heat exchange unit 11 of the present embodiment. A drain discharge system 65 is provided.
The blower 10 is similar to a known one, includes a fan (not shown) inside, and can adjust the blower amount and the like according to the combustion amount of the combustion unit 9.

  The controller 51 is provided in each water heater main body 2 and is electrically connected to a control device 50 that can be controlled in a centralized manner. That is, the controller 51 transmits and receives signals to and from the control device 50 to control individual water heater main bodies 2.

  The pump unit 3 has a pump unit housing 6, the two circulation pumps 13 and 14 in the pump unit housing 6, and an expansion tank 17 that equalizes excessive pressure rise and pressure drop in the pipe. And a controller 53 for controlling the circulation pumps 13 and 14 and the like.

As shown in FIG. 6, the pump unit housing 6 is configured by a housing body 6 a having one surface opened and a lid portion 6 b that covers the open portion of the housing body 6 a, as in the water heater body 2. Yes.
The casing main body 6a is provided with a plurality of pipe joints 43, 44, and 45 (three types for entering water, discharging, and draining in this embodiment) on the bottom surface side based on a normal installation state. That is, as shown in FIG. 6B, the housing main body 6a is provided with a water inlet pipe joint 43 on the bottom surface, slightly below and right of the center, with the double-dot chain line as a reference, and slightly above and to the left of the center. A discharge pipe joint 44 is arranged, and a drain pipe joint 45 is arranged on the upper left side.
The pump unit housing 6 has a hopper joint 35 attached at a position downstream of the drainage pipe joint 45. The hopper joint 35 is similar to a known one.

  Specifically, the positions of the pipe joints 43 to 45 will be described. As shown in FIG. 6B, the bottom surface of the housing main body 6a is divided into four equal parts by a double-dotted chain line passing through the center of the bottom surface. Among the areas, the pipe joints 43 to 45 are arranged in the upper left area P and the lower right area Q. That is, a drainage pipe joint 45 and a water inlet pipe joint 43 are arranged in the upper left area P, and a discharge pipe joint 44 is arranged in the lower right area R.

  More specifically, as shown in FIG. 7, a drainage pipe joint 45 is disposed in the uppermost and leftmost region Pp among the regions equally divided by the two-dot chain line, and two steps from the top. A water inlet pipe joint 43 is arranged in the second area Pr from the left and the second from the left, and a discharge pipe is provided in the third area Rp from the top and the third from the left or the second from the bottom and the second from the right. A joint 44 is arranged.

  Further, similarly to the water heater body 2, if viewed from another perspective, the positions of the pipe joints 43 to 45 are based on the center of the bottom surface (intersection formed by a two-dot chain line) C as shown in FIG. 8. The discharge pipe joint 44 is separated by a distance sa and a downward distance sb in the right direction, the incoming pipe joint 43 is separated by a distance sc and an upward distance sd, and the drain pipe joint 45 is left. A distance se in the direction and a distance sf in the upward direction.

The circulation pumps 13 and 14 supply hot water using a motor (not shown) as a drive source, and a known spiral pump is adopted. In addition, the circulation pump 14 in this embodiment is used for the temporary use used at the time of the maintenance of the main circulation pump 13, the time of failure, etc., or the rotation used for the circulation pump 13 every predetermined time.
The expansion tank 17 is a sealed type pressure accumulating means. A safety valve 54 is provided in the vicinity of the expansion tank 17, and a hot water discharge system 66 (FIG. 1) that discharges hot water in the pipe to the outside when the pressure rises beyond the allowable range of the expansion tank 17. Is provided.

  The controller 53 is provided in the pump unit 3 and is electrically connected to a control device 50 that can be controlled collectively. That is, the controller 53 controls the pump unit 3 by transmitting and receiving signals to and from the control device 50.

  In the present embodiment, the remote controller 52 and the control device 50 are electrically connected. When the user operates the remote controller 52, a signal is transmitted to each of the controllers 51 and 53 via the control device 50. .

Next, the flow path in the hot water supply system 1 of the present embodiment will be described.
The hot water supply system 1 is mainly provided with a hot water supply system 20 for hot water supply and a drainage system 21 for drainage.

The hot water supply system 20 in this embodiment is roughly divided into two paths, a hot water supply path through which hot water flows during hot water supply operation, and an immediate hot water path through which hot water flows during hot water operation. In the present embodiment, these paths are a water supply passage 22 for flowing hot water supplied from a water supply source (not shown) to the water heater main body 2, and a hot water flow passage 23 for flowing hot water discharged from the water heater main body 2 to the currant 60. And a hot water supply side return passage 24 for circulating hot water from the currant 60 to the hot water heater body 2 again.
Specifically, as shown in FIG. 9, the hot water supply path is formed by the water supply flow path 22 and the hot water flow path 23, and the immediate hot water supply path is as shown in FIG. 10. A circulation circuit 19 having a part, a hot water flow path 23 and a hot water supply side return flow path 24 as constituent elements is formed.

The water supply passage 22 is attached to the water supply main pipe 25 connected to the water supply source, the water supply branch pipes 26 and 27 branched from the water supply main pipe 25, and the water heater main body 2 in order from the upstream side to the downstream side. The water inlet pipe joint 40 and the internal upstream flow path 33 which is a pipe inside the water heater main body 2 and connected to the upstream side of the heat exchanging section 11 are formed. The internal upstream flow path 33 is connected to a bypass pipe 48 that bypasses the heat exchange unit 11. That is, the water supply flow path 22 is a flow path for supplying hot water that has passed through the water supply main pipe 25 to the heat exchange section 11 of one or both of the water heater main bodies 2.
A hot water flow rate sensor 55 and an incoming water temperature sensor 56 are provided in the middle of the internal upstream flow path 33 of the water heater body 2, and a bypass water amount sensor 59 and a water amount adjustment valve 61 are provided in the middle of the bypass pipe 48. Each device is electrically connected to the controller 51.

The hot water flow passage 23 is attached to the hot water main pipe 28 connected to the currant 60, the hot water branch pipes 29 and 30 branched from the hot water main pipe 28, and the water heater main body 2 in order from the downstream side to the upstream side. The hot water outlet pipe joint 41 and the internal downstream flow path 34 which is a pipe inside the water heater main body 2 and connected to the downstream side of the heat exchanging section 11 are formed. That is, the hot water flow path 23 is a flow path for supplying hot water that has passed through the heat exchange unit 11 to the currant 60.
A flow rate adjustment valve 57, a hot water temperature sensor 58, and the like are provided in the middle of the internal downstream side flow path 34 of the water heater body 2, and each device is electrically connected to the controller 51.

The hot water supply side return flow path 24 is a flow path that is located on the downstream side of the hot water flow path 23 in the hot water flow direction, and circulates hot water that has passed through the hot water flow path 23 to the hot water supply body 2 side as needed. It is a flow path to be made. That is, the hot water supply side return flow path 24 is connected to the return main pipe 31 connected to the downstream end of the hot water main pipe 28 in order from the upstream side to the downstream side with respect to the currant 60, and the return main pipe 31. A connecting pipe 32 located between the downstream end and the pump unit 3, a water inlet pipe joint 43 attached to the pump unit 3, an internal pipe 46 of the pump unit 3, a discharge pipe joint 44, and a water supply A pump unit branch pipe (hereinafter also simply referred to as a unit branch pipe) 49 connected in the middle of the main pipe 25 is formed. That is, the hot water supply side return flow path 24 is a flow path for flowing hot water not discharged from the currant 60 to the water supply main pipe 25 via the pump unit 3.
The circulation pumps 13 and 14 are disposed in the middle of the internal piping 46 of the pump unit 3, and the expansion tank 17 is disposed upstream of the circulation pumps 13 and 14.

As described above, the drainage system 21 is configured by the drainage drainage channel 63 partially including the drainage drainage system 65 and the hot water drainage channel 64 partially including the hot water drainage system 66.
The drain drainage channel 63 includes a drainage main pipe 67 connected to an external pipe, a hot water supply side drainage branch pipe 68 branched from the drainage main pipe 67 to the water heater body 2, and an upstream end of the hot water supply side drainage branch pipe 68. The hopper joint 36 attached to the water heater body, the drainage pipe joint 42 attached to the water heater main body 2, and the drain discharge system 65 are formed.
The hot water drainage channel 64 includes a drainage main pipe 67, a unit side drainage branch pipe 70 branched from the drainage main pipe 67 to the pump unit 3, a drainage pipe joint 45 attached to the pump unit 3, and a hot water discharge. It consists of a system 66.
That is, the drainage system 21 is a flow path for draining drained water and unnecessary hot water discharged from the water heater body 2 and the pump unit 3 to the outside.

Here, conventionally, in a commercial facility or the like, when a water heater main body is fixed at a predetermined position, a water heater main body fixing member that meets the specifications of the water heater main body is used. The hot water heater main body fixing member includes a stand alone 4a as shown in FIG. The stand unit 4a includes a base portion 72 placed on the floor of the construction site, a standing portion 73 joined so as to stand substantially perpendicular to the base portion 72, and the standing portion 73. It is comprised by the support part 74 supported supportingly. The hot water heater body is fixed to the upper side (upper side) from the center in the height direction of the standing portion 73 of the stand unit 4. Further, in the case of fixing a plurality of water heater main bodies, a connection base 4b in which a plurality of bases 4a are connected (two in FIG. 12 are connected) is used. Here, “connected” means both the fact that the plurality of mounts 4a are actually connected and the fact that they are formed to have substantially the same size as the connection of the mounts 4a. .
On the other hand, the conventional pump unit is not fixed to a fixing member such as the gantry 4a, 4b with respect to the water heater body, and is usually installed on the floor.

  Thus, conventionally, only the water heater body is fixed to the gantry 4 and the pump unit is placed on the floor. Further, since the conventional pump unit is designed to have a larger outer dimension than the water heater main body, the gantry 4a, 4b, which is a water heater main body fixing member, cannot be used substantially. Therefore, in such a hot water supply system, it has been impossible to unify the overall appearance.

Conventionally, in the hot water supply system, the main pipes of the water supply system and the drainage system are arranged on the lower side (lower side) of the mounts 4a and 4b in the height direction. And the branch piping branched from each main piping is connected to each piping joint in the water heater main body fixed to the upper stage side of the mount frame 4a, 4b. Specifically, taking as an example the case where the hot water supply system has a plurality of water heater main bodies, each main pipe is arranged to extend in parallel to the water heater main bodies arranged in parallel. That is, it arrange | positions so that each main piping may straddle the water heater main body in which each main piping was arranged in parallel at the lower stage side of the connection stand 4b. In addition, these main pipes are arranged so as to be aligned in the height direction. For example, the drain main pipe, the water supply main pipe, and the hot water main pipe are arranged in this order from the top to the bottom in the height direction. Further, each of the main pipes is a standard product (meaning the above-mentioned in-house standard), and a branch pipe connecting portion is provided at regular intervals. For this reason, as branch piping connected to each water heater main body, if attention is paid to the same type of main piping, for example, the water supply main piping of the water supply system, those of the same standard can be adopted.
On the other hand, in contrast to such a water heater body, the conventional pump unit is a floor-standing type as described above. Therefore, the standard branch piping used for the water heater body is substantially utilized. It was not possible to prepare a branch pipe for the pump unit.

  Thus, conventionally, the water heater body and the pump unit cannot use the same standard for the branch pipes connected to the main pipes. As a result, the piping work of the water heater body and the pump unit is different. As a result, work efficiency was reduced. Furthermore, this also led to an increase in construction costs.

Therefore, the hot water supply system 1 according to the present embodiment is provided with a characteristic configuration that can unify the appearance and can use branch pipes and the like of the same standard for both the hot water supply body and the pump unit.
Below, the characteristic structure in this embodiment is demonstrated concretely.

(Identification of dimensions)
In this embodiment, as shown in FIGS. 2, 3, and 6, the external dimensions of the pump unit housing 6 are designed to be substantially the same as the external dimensions of the heat source housing 5. That is, the pump unit housing 6 is 0.9 to 1.1 times the dimensions of the source housing 5 in terms of height, width, and depth, respectively, when the dimensions of the source housing 5 are used as a reference. The size is preferably about 0.95 to 1.05 times. That is, by this “identification of dimensions”, the casings 5 and 6 of the water heater main body 2 and the pump unit 3 are almost uniform in height, width, and depth length. Unity is formed.

(Use of the mount)
In the present embodiment, the pump unit housing 6 can be fixed to the hot water heater main body fixing member. That is, a configuration is adopted in which two water heater main bodies 2 and one pump unit 3 are juxtaposed and fixed by using the connection frame 7 shown in FIG. In other words, in the present embodiment, the connection stand 7 dedicated to the water heater body 2 is originally used as a fixing means for the pump unit 3. As described above, the “use of the gantry” allows the water heater main body 2 and the pump unit 3 to be fixed at the same position using the same gantry 7, so that the uniformity of the appearance of the entire hot water system 1 is further improved. improves.

(Identification of piping connection position)
In the present embodiment, each of the pipe joints 40 to 42 of the heat source casing 5 and each of the pipe joints 43 to 45 of the pump unit casing 6 are arranged at substantially the same position.
Here, “substantially the same position” means that, as shown in FIG. 3 (b), a hot water outlet pipe joint 41 and a drain pipe joint 42 exist in the area A of the water heater body 2, and FIG. As shown in FIG. 3B, if the water inlet pipe joint 43 and the drain pipe joint 45 are present in the area P of the pump unit 3, they are regarded as almost the same position, and as shown in FIG. If the incoming water pipe joint 40 exists in the area B of FIG. 6 and the discharge pipe joint 44 exists in the area R of the pump unit 3 as shown in FIG.

  More specifically, as shown in FIG. 4, a drainage pipe joint 42 exists in the area Aa of the water heater body 2, and as shown in FIG. 7, a drainage pipe joint 45 in the area Pp of the pump unit 3. 4 is regarded as almost the same position, and as shown in FIG. 4, a hot water piping joint 41 is present in the region Ab of the hot water supply body 2, and as shown in FIG. If the water inlet pipe joint 43 is present, it is regarded as almost the same position. As shown in FIG. 4, the water inlet pipe joint 40 exists in the area Ba of the water heater body 2, and as shown in FIG. If the discharge pipe joint 44 exists in the region Rp of the unit 3, it is regarded as almost the same position.

The “substantially the same position” described above can be defined not only by the positional relationship in the region described above but also by using the concept of distance from a predetermined reference.
Here, as described above, in the water heater main body 2, as shown in FIG. 5, the position of the incoming water pipe joint 40 is (ta, tb), the position of the hot water outlet pipe joint 41 is (tc, td), and drainage. The position of the pipe joint 42 is (te, tf). Further, in the pump unit 3, as shown in FIG. 8, the position of the discharge pipe joint 44 is (sa, sb), the position of the incoming water pipe joint 43 is (sc, sd), and the position of the drainage pipe joint 45 is (Se, sf).
Therefore, in the present embodiment, the position (sa, sb) of the discharge pipe joint 44 of the pump unit 3 is 0.8 to 1.2 times the distance ta and the distance tb from the center C of the water heater body 2, preferably If the position is 0.9 to 1.1 times, it is regarded as almost the same position, and the position (sc, sd) of the water inlet pipe joint 43 of the pump unit 3 is the distance tc from the center C of the water heater body 2. And the position (se, sf) of the drainage pipe joint 45 of the pump unit 3 is regarded as almost the same if the position is 0.8 to 1.2 times, preferably 0.9 to 1.1 times the distance td. If the position is 0.8 to 1.2 times, preferably 0.9 to 1.1 times the distance te and the distance tf from the center C of the water heater main body 2, they are regarded as substantially the same position.

  In this way, the water inlet pipe joint 40 on the water heater body 2 side and the discharge pipe joint 44 on the pump unit 3 side are set to substantially the same position, and the hot water outlet pipe joint 41 on the water heater body 2 side and the pump unit 3 are connected. The water inlet pipe joint 43 was set to substantially the same position, and the water drain pipe joint 42 on the water heater body 2 side and the water drain pipe joint 45 on the pump unit 3 side were set to substantially the same position.

  Furthermore, as shown in FIG. 2, each type of main pipes 25 and 67 (the hot water main pipe 28 and the return main pipe 31 are based on the state where the water heater main body 2 and the pump unit 3 are fixed to the connecting frame 7. Paying attention to the connection positions of branch pipes etc.), each connection position has a certain interval l, m in the left-right direction (parallel direction of the water heater body 2 and the pump unit 3) for each type of main pipe. Has been placed. Needless to say, as shown in FIG. 14, the connection positions of the branch pipes and the like of the main pipes 25 and 67 of each type are positions in the depth direction (left and right direction in FIG. 14) even if the position changes in the parallel arrangement direction. Are the same. In other words, the connection position of the branch pipe to the water heater body 2 in each main pipe 25, 67 and the connection position of the branch pipe to the pump unit 3 in each main pipe 25, 67 are substantially the same position.

In this way, the water heater main body 2 and the pump unit 3 use the same standard branch pipe for connecting parts such as branch pipes in the same type of main pipe by performing "identification of the position of the pipe connection part". can do. That is, as shown in FIGS. 1, 2, and 14, if attention is paid to the water supply main pipe 25, branch pipes of the same standard are used for the water supply branch pipes 26 and 27 of the water heater body 2 and the unit branch pipe 49 of the pump unit 3. If attention is paid to the drainage main pipe 67, branch pipes of the same standard can be used for the hot water supply side drain branch pipe 68 of the water heater body 2 and the unit side drain branch pipe 70 of the pump unit 3.
On the other hand, since only the hot water branch pipes 29 and 30 of the water heater main body 2 are connected to the hot water main pipe 28 and only the connecting pipe 32 of the pump unit 3 is connected to the return main pipe 31, these As described above, branch pipes of the same standard cannot be used for connecting portions of the main pipes 28 and 31 such as branch pipes.

As described above, since the same standard pipe can be used in the water heater main body 2 and the pump unit 3 by “identifying the position of the pipe connecting portion”, the piping work is simplified and the work time is reduced. Therefore, work efficiency increases and construction costs can be reduced.
As a result, the types of piping required for the piping work can be reduced, so that the management of piping and the like is facilitated.

  Moreover, in this embodiment, as shown in FIG. 15, the cover member 62 which covers the lower stage of the connection mount frame 7 is provided. That is, the cover member 62 can hide the pipes and the like disposed below the water heater body 2 and the pump unit 3. Thereby, it becomes possible to further improve the uniformity in the hot water supply system 1 as a whole.

  In the said embodiment, although the structure which unified the position of two types of piping connection parts for water supply and drainage was shown in this invention, it is not limited to this, Any one pipe connection for water supply and drainage The configuration may be such that the positions of the parts are the same.

  In the said embodiment, although the structure provided with the secondary heat exchanger 16 mainly collect | recovering latent heat in the water heater main body 2 was shown, this invention is not limited to this, The structure which is not provided with the secondary heat exchanger 16 It does not matter.

  In the said embodiment, although the hot water supply system 1 comprised by the two water heater main bodies 2 and the one pump unit 3 was shown, this invention is not limited to this, The number of the water heater main bodies 2 is further increased. It may be a reduced configuration or a reduced configuration.

  Moreover, in the said embodiment, although the structure which distribute | arranged piping joints 40-45 to specific areas, such as area | region Aa and area | region Pp, was shown, this invention is not limited to this, Each area | region different from an above-described area | region is shown. A configuration in which the pipe joints 40 to 45 are arranged may be used. Even in that case, it is necessary to make the position of the pipe joint to which the branch pipe branched from the same main pipe is connected substantially the same.

1 Hot water supply system 2 Water heater body (heat source part)
DESCRIPTION OF SYMBOLS 3 Pump unit 4 Stand alone 5 Heat source case 6 Pump unit case 7 Connection stand 8 Combustion unit 13, 14 Circulation pump 16 Secondary heat exchanger 17 Expansion tank 19 Circulation circuit 40 Inlet pipe joint 41 Outlet pipe joint 42 Pipe joint for drainage 43 Pipe joint for incoming water 44 Pipe joint for discharge 45 Pipe joint for drainage

Claims (5)

A heat source for heating hot water and a pump unit having a circulation pump are connected by piping, and hot water at a predetermined temperature is retained in the piping including both devices, and discharged from the retained hot water as required. A hot water supply system with a function,
The heat source unit and the pump unit each have a housing,
Each case is set to approximately the same size, and based on normal installation conditions, multiple pipe connections are provided on the same direction surface,
At least one of the pipe connections of the heat source unit, at least one of the pipe connection portion of the pump unit, Ri substantially the same position der,
The hot water supply system, wherein the heat source unit and the pump unit are fixed to the same frame. The heat source part is a heat source part that has a combustion part that burns fuel to generate combustion gas and a secondary heat exchanger that mainly recovers the latent heat of the combustion gas, and the heat source part is a condensation generated by the recovery of latent heat. Water is discharged through any of the pipe connections,
The hot water supply system according to claim 1, wherein the pump unit includes an expansion tank, and hot water overflowing from a flow path communicating with the expansion tank is discharged through any of the pipe connection portions. A heat source for heating hot water and a pump unit having a circulation pump are connected by piping, and hot water at a predetermined temperature is retained in the piping including both devices, and discharged from the retained hot water as required. A hot water supply system with a function,
The heat source unit and the pump unit each have a housing,
Each case is set to approximately the same size, and based on normal installation conditions, multiple pipe connections are provided on the same direction surface,
At least one of the pipe connections of the heat source part and at least one of the pipe connections of the pump unit are at substantially the same position,
The heat source part is a heat source part that has a combustion part that burns fuel to generate combustion gas and a secondary heat exchanger that mainly recovers the latent heat of the combustion gas, and the heat source part is a condensation generated by the recovery of latent heat. Water is discharged through any of the pipe connections,
The pump unit has an expansion tank, and hot water overflowing from a flow path communicating with the expansion tank is discharged via any one of the pipe connection portions. At least a main pipe for water supply, for hot water supply, and drainage, and a branch pipe branched from one of the main pipes is connected to each pipe connection part in the heat source part and the pump unit,
The pipe connection part arranged at the substantially same position among the pipe connection parts of the heat source part and the pump unit is connected to a branch pipe branched from the same main pipe. Hot water supply system according to crab. A heat source for heating hot water and a pump unit having a circulation pump are connected by piping, and hot water at a predetermined temperature is retained in the piping including both devices, and discharged from the retained hot water as required. A hot water supply system with a function,
The heat source unit and the pump unit each have a housing,
Each case is set to approximately the same size, and based on normal installation conditions, multiple pipe connections are provided on the same direction surface,
At least one of the pipe connections of the heat source part and at least one of the pipe connections of the pump unit are at substantially the same position,
At least a main pipe for water supply, for hot water supply, and drainage, and a branch pipe branched from one of the main pipes is connected to each pipe connection part in the heat source part and the pump unit,
Of the pipe connection parts of the heat source part and the pump unit, the pipe connection part arranged at substantially the same position is connected to a branch pipe branched from the same main pipe.

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