JP2013092328A - Hot water storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage water heater capable of satisfying both of retention of heat insulation performance of a hot water storage tank by a heat insulation material and facility of maintenance of a temperature detection means installed in the hot water storage tank.SOLUTION: A notch 81 is formed which penetrates in an internal/external direction in a vertical direction on a side surface part of the hot water storage tank 4 covered with a heat insulation material 8, and tank thermistors 71, 73 are installed on a surface of the hot water storage tank 4 via the notch 81. An internal/external double pipe type heat exchanger 35 is internally fitted to the notch 81 in a detachable manner to cover the tank thermistors 71, 73. An outer pipe part 351 of the heat exchanger 35 is formed of synthetic resin to secure the heat insulation performance of the notch 81.

Description

  The present invention relates to a hot water storage and hot water supply apparatus including a hot water storage tank covered with a heat insulating material, and more particularly to a hot water storage and hot water supply apparatus that can facilitate maintenance of temperature detection means installed in the hot water storage tank.

  Conventionally, in a hot water supply apparatus equipped with a hot water storage tank, a temperature detection means is installed on the side of the hot water tank to detect the hot water temperature in the hot water storage tank, Is covered with a heat insulating material. In Patent Document 1 to be described later, a hot water storage tank is covered with a heat insulating material having a shape corresponding to the outer peripheral surface thereof, while portions facing a plurality of temperature sensors installed in the hot water storage tank are continuously opened, It has been proposed to attach a plurality of lids having a shape obtained by dividing the opening into a plurality. Moreover, in patent document 2, while including the temperature sensor installed in the hot water storage tank, and covering with a heat insulating material, with respect to the heat insulating material of the site | part corresponding to the temperature sensor, a notch groove is formed so that a temperature sensor may be enclosed. It has been proposed to make it easy to cut only that part. Further, Patent Document 3 proposes that the hot water storage tank is covered with a heat insulating material, while a concave portion is formed on the outer surface of the heat insulating material, and a heat exchanger is provided in the concave portion.

JP 2009-121719 A JP 2010-14385 A JP 2011-94925 A

  However, in the prior art described above, in order to maintain the temperature detection means installed in the hot water storage tank, it is necessary to remove the lid or to partially cut off the heat insulating material along the cut groove. Furthermore, once removed or cut off, it is difficult to restore the original heat insulation state, which may lead to deterioration of the heat insulation performance of the hot water storage tank after maintenance.

  The present invention has been made in view of such circumstances, and an object of the present invention is to maintain the heat insulation performance of the hot water storage tank by the heat insulating material and to easily maintain the temperature detection means installed in the hot water storage tank. An object of the present invention is to provide a hot water storage and hot water supply device that can satisfy both of the characteristics.

  In order to achieve the above object, in the present invention, a hot water storage tank for storing hot water heated by a heating means is provided, and a side surface of the hot water storage tank is provided for detecting the temperature of hot water stored in the hot water storage tank. A temperature detection means is installed, and the following specific items are provided for a hot water storage hot water supply apparatus in which the outer surface of the hot water storage tank is covered with a heat insulating material. That is, a portion of the heat insulating material corresponding to a portion facing the outer surface side of the temperature detecting means is cut out to form a cutout portion penetrating inward and outward. And the piping member was installed so that attachment or detachment was possible so that the outer surface side of the said temperature detection means might be covered with respect to the said notch part, and it was set as the structure by which the said notch part was covered by this piping member (Claim 1).

  In the case of the present invention, since the outer surface side and the cutout portion of the temperature detecting means are all covered with the piping member, while securing the temperature detecting means, securing the installation location of the piping member and thereby increasing the degree of freedom of layout. Will get. And since the piping member is attached so that attachment or detachment is possible, only by removing a piping member, a notch part will be open | released and the outer surface side of a temperature detection means will be exposed outside. For this reason, maintenance etc. of a temperature detection means can be easily performed now. If the piping member is attached again, it is possible to restore the temperature detecting means to the original protected state by covering the outer surface side of the temperature detecting means and the notch portion with the piping member as before.

  The piping member in the hot water storage and hot water supply apparatus of the present invention can be constituted by a piping main body and a heat insulating material attached integrally to the outer periphery of the piping main body (Claim 2). By doing so, not only the outer surface side of the temperature detection means and the notch are covered with the piping member to protect the temperature detection means, but also the heat insulation performance of the hot water storage tank at the notch part is maintained. Will get. And even if the piping member is removed for maintenance, the temperature detecting means and the notch can be covered with the piping member by reattaching, and the same heat insulation performance as the original state before maintenance can be restored and exhibited. Is possible.

  Further, as a piping member in the hot water storage and hot water supply apparatus, it can be supported so as to be movable between the inside of the notch portion and the outside of the notch portion while maintaining a state in which hot water can be circulated therein. . In this way, even if the piping member is used to cover the notch, it is not necessary to drain or stop the hot water storage tank for maintenance of the temperature detection means, greatly increasing the maintenance work. It is possible to save labor.

  Furthermore, as a piping member in the hot water storage and hot water supply apparatus, it can be constituted by an inner and outer double pipe type heat exchanger, and the outer pipe portion can be formed of a synthetic resin. By doing so, the location of the heat exchanger can be omitted, thereby greatly reducing the size of the heat exchanger and increasing the degree of freedom of the layout. It is possible to secure not only the heat insulation but also the heat insulation property of the hot water storage tank through the notch.

  As described above, according to the hot water storage and hot water supply apparatus of the present invention, the outer surface side of the temperature detection means and all of the notches can be covered with the piping member, and while protecting the temperature detection means, It is possible to increase the degree of freedom in securing the installation location and thereby layout. In addition, by simply removing the piping member, the notch can be opened to expose the outer surface side of the temperature detecting means to the outside, and the temperature detecting means can be easily maintained. If the piping member is attached again, the outer surface side of the temperature detecting means and the notch can be completely covered with the piping member as in the original, and the temperature detecting means is restored to the original protected state. Will be able to.

  In particular, according to the second aspect, the pipe member includes a pipe main body and a heat insulating material integrally attached to the outer periphery of the pipe main body, so that the outer surface side and the cutout portion of the temperature detecting means are connected to the pipe member. Thus, not only the temperature detecting means can be protected, but also the heat insulation performance of the hot water storage tank in the notch portion can be maintained. And even if the piping member is removed for maintenance, the temperature detecting means and the notch can be covered with the piping member by reattaching, and the same heat insulation performance as the original state before maintenance can be restored and exhibited. Will be able to.

  According to the third aspect of the present invention, as the piping member, the piping member is supported so as to be movable between the inside of the notch and the outside of the notch while maintaining a state in which hot water can flow inside. Even if it is used to cover the notch, it is possible to eliminate the need to drain or stop the hot water storage tank for maintenance of the temperature detection means, which can greatly save the maintenance work. It becomes like this.

  Furthermore, according to claim 4, the piping member is constituted by an inner / outer double pipe type heat exchanger, and the outer pipe portion is formed of a synthetic resin, so that the location of the heat exchanger can be omitted. In addition to being able to greatly reduce the size and increase the degree of freedom of layout, the outer pipe part is made of synthetic resin, which not only insulates the heat exchanger but also insulates the hot water storage tank through the notch. Can be secured.

It is a schematic diagram of the hot water storage hot-water supply apparatus which concerns on embodiment of this invention. It is a cross-sectional explanatory drawing of what concerns on 1st Embodiment as a hot water storage tank of FIG. FIG. 3 is a cross-sectional explanatory view taken along line AA in FIG. 2. FIG. 4 is an exploded perspective view of the hot water storage tank of FIGS. 2 and 3. It is a perspective view which shows the hot water storage tank which concerns on 2nd Embodiment. FIG. 3 is a partial corresponding view of FIG. 2 showing a form different from that of FIG. 2. FIG. 7 is a partial corresponding view of FIG. 2 showing a different form from that of FIGS. 2 and 6.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view of a hot water storage and hot water supply apparatus according to an embodiment of the present invention. This hot water storage hot water supply apparatus is a combination of the heating means 2 and the hot water storage unit 3. Various heating means 2 can be employed. For example, a heat pump device using a refrigeration cycle, an exhaust heat recovery heat exchanger of a fuel cell, a solar heat collection panel, or the like can be employed as the heating means 2 for heating the stored hot water in the hot water storage tank. In addition, as a heating means 2 which comprises the hot water storage hot-water supply apparatus with which this invention is applied, various things other than the above illustration are employable, and as the hot water storage unit 3, the hot water heated by the heating means 2 is used. As long as it has a hot water storage tank 3 for storing and a piping member to be described later through which the hot water flows, other configurations are not essential and can be added or changed as appropriate.

  A heat pump device connects a compressor, a condensation heat exchanger, an expansion valve, and an evaporative heat exchanger in order to a refrigerant circulation circuit, and circulates an appropriate refrigerant such as HC refrigerant such as propane or CO2. The process of compression, condensation, expansion, and evaporation is repeated. Then, the condensation heat exchanger is used as the heat exchanger 21 for heat exchange heating, and in this condensation heat exchanger, the refrigerant that has become a high-temperature gas phase state by the compression of the previous process is used as a heat source. What is necessary is just to heat-heat the hot water. When the exhaust heat recovery heat exchanger of the fuel cell is used as the heat exchanger 21 for heat exchange heating, the exhaust gas generated during power generation by the fuel cell is led to the exhaust heat recovery heat exchanger, The hot water on the hot water storage unit 3 side may be heat exchange heated by recovering the exhaust heat. Further, when a solar heat collecting panel is used as a heating means, a medium is circulated between the heat collecting panel and the heat exchanger 21 for heat exchange heating, and the medium heated by receiving solar heat in the heat collecting panel The hot water on the hot water storage unit 3 side may be heated by heat exchange.

  The hot water storage unit 3 operates the hot water storage tank 4 for storing the hot water heated by the heating means 2 and the hot water stored in the hot water storage tank 4 by operating the circulation pump 30 for the heat exchange heating heat exchange. A heat storage circuit 31 that circulates and heats with the vessel 21, a water supply passage 32 that supplies water to the bottom of the hot water storage tank 4 based on the water pressure and maintains the hot water storage tank 4 in a full state, and a downstream end A hot water supply passage 33 for supplying hot water from the top of the hot water storage tank 4 by opening a hot water supply tap (not shown), and a bath heating circuit 34 for heating hot water in the bathtub 5 using hot water in the hot water storage tank 4 as a heat source, It is configured with.

  The heat storage circuit 31 controls the operation of the circulation pump 30 by the controller 6, thereby guiding the low-temperature hot water on the bottom side of the hot water storage tank 4 to the heat exchanger 21 for heat exchange heating. The hot water after the exchange heating is returned to the top of the hot water storage tank 4 to store heat in the hot water storage tank 4 in a hot water state. At that time, the hot water temperature in the hot water storage tank 4 is detected by tank thermistors 71, 72, 73 as temperature detecting means, and the controller 6 is based on the comparison between the detected hot water temperature and the heat source condition on the heating means 2 side. Thus, appropriate heat storage control is performed. The tank thermistors 71, 72, and 73 are installed at intervals in the vertical direction of the hot water storage tank 4 so that the hot water temperature at each predetermined height position of the hot water storage tank 4 can be detected. 1 illustrates the case of three tank thermistors 71, 72, 73. However, the present invention is not limited to this, and the size of the hot water storage tank 4 and the heat storage status based on, for example, temperature stratification in the hot water storage tank 4 are understood. The number of installations is appropriately determined according to the purpose.

  The bath heating circuit 34 includes a heat exchanger 35 for bath heating of a liquid-liquid heat exchange type, and a heat source circulation path 36 for circulatingly supplying hot water in the hot water storage tank 4 as a heat source to the heat exchanger 35. And a bathtub water circulation path 37 that circulates and supplies hot water in the bathtub 5 to the heat exchanger 35 for heat exchange heating. The heat source circulation path 36 is connected to the heat source 35 of the heat exchanger 35 by the operation of the circulation pump 38. The heat source circulation path 36 takes out the hot water from the top connection port 41 of the hot water storage tank 4 and supplies it to the low temperature by heat exchange. And a return path 362 for returning the hot water from the bottom connection port 42 to the hot water storage tank 4. The bathtub water circulation path 37 is also operated by the circulation pump 39 to return the hot water in the bathtub 5 to the heated side of the heat exchanger 35 and the hot water after the heat exchange heating to the bathtub 5. And an outgoing path 372 to be supplied.

<First Embodiment>
Assuming the hot water storage and hot water supply apparatus described above, the hot water storage tank 4 according to the first embodiment has the outer surface of the hot water storage tank 4 covered with a heat insulating material 8 as shown in detail in FIGS. A portion of the heat insulating material 7 facing the outer surface of the tank thermistors 71, 72, 73 installed (for example, affixed) on the side surface of the tank 4 is notched, and a notch portion 81 penetrating inward and outward is formed. The width and length of the notch 81 are set as follows. In other words, the tank thermistors 71, 72, 73 have a width that is greater than the width of the tank thermistors 71, 72, 73 and that allows the tank thermistors 71, 72, 73 to be installed and maintained from the outside of the notch 81. Is set so as to have a length including the range in the up-and-down direction.

  And in this notch part 81, the heat exchanger 35 for the bath heating as a piping member is internally fitted toward the inside from the outside. The heat exchanger 35 is formed so as to have a shape that matches the width and length of the notch 81, and is configured as an inner / outer double-pipe liquid-liquid heat exchanger, and in particular, the outer tube 351. Is formed of a synthetic resin so as to exhibit the heat insulating performance as a whole. The outer tube portion 351 in the figure has a rectangular outer surface shape (see FIG. 2) and is formed so as to exactly match the width and length of the notch 81. While it can be fitted in by being pushed inward from the outside (see FIG. 4), it can be removed from the heat insulating material 8 by being pulled out. And in order to ensure the certainty of installation of the heat exchanger 35, the heat exchanger 35 is attached to the appropriate place of the hot water storage tank 4 side or the heat insulating material 8 side through the attachment means which can be attached or detached. For example, in the illustrated example, brackets 43, 43 are fixed to the hot water storage tank 4 side in the notch 81, and the heat exchanger 35 is screwed to the brackets 43, 43 with screws 431, 431. Yes.

  In the heat exchanger 35, the doughnut-shaped flow path between the outer tube portion 351 made of a synthetic resin (refer mainly to FIG. 2) and the inner tube portion 352 formed of a heat conducting material, and the inner tube portion 352 Hot water in the hot water storage tank 4 as a heat source that flows to one of the internal flow paths and hot water in the bathtub 5 (see FIG. 1) that flows to the other flow through the tube wall of the inner pipe portion 352. It is to be exchanged. That is, hot water in the hot water storage tank 4 (mainly see FIG. 3) is introduced into one of the donut-shaped flow path and the internal flow path through the top connection port 41 and the forward path 361, and is led out to the return path 362 after heat exchange. Then, it flows into the hot water storage tank 4 through the circulation pump 38 from the bottom connection port 42. At the same time, the hot water of the bathtub 5 is introduced into the other of the donut-shaped flow path and the internal flow path through the return path 371, and after being subjected to heat exchange heating, is led out to the forward path 372 and supplied to the bathtub 5.

  In the case of the hot water storage tank 4 (mainly see FIG. 4) according to the first embodiment described above, a predetermined portion corresponding to the tank thermistor installation position is cut out in the vertical direction from the state covered with the heat insulating material 8 to form the cutout portion 81. The tank thermistors 71, 72, 73 are installed through the notches 81, and the heat exchanger 35 is screwed to the brackets 43, 43 so as to cover the outer surfaces of the tank thermistors 71, 72, 73. What is necessary is just to attach by a stop. In this state, the tank thermistors 71, 72, 73 and the notch 81 are all covered by the heat exchanger 35, and are further insulated by the heat insulating function of the synthetic resin that is a material for forming the outer tube portion 351 of the heat exchanger 35. Performance will be maintained. Then, the heat exchanger 35 can be easily removed from the notch 81 by simply removing the screws 431, 431,..., And for this reason, the tank thermistors 71, 72, 73 are connected via the notch 81 in the open state. Maintenance (for example, checking and replacement) can be easily performed. Furthermore, after maintenance, the heat exchanger 35 can be re-inserted into the cutout portion 81 and screwed, so that all of the tank thermistors 71, 72, 73 and the cutout portion 81 can be covered with the heat exchanger 35, The same heat insulation performance as the original state before the removal of the heat exchanger 35 can be restored and exhibited.

Second Embodiment
FIG. 5 shows a hot water storage tank 4 according to the second embodiment. In the second embodiment, the heat exchanger 35 as a piping member is fitted in the notch 81 and the outside is taken out so as not to interfere with maintenance of the tank thermistors 71, 72, 73, etc. It is designed so as to be movable between each other.

  That is, support arms 353 and 354 extending from the upper end side and the lower end side of the heat exchanger 35 are connected to each other, and the support arms 353 and 354 are supported and fixed to the hot water storage tank 4 side or the heat insulating material 8 side. The support portions 44 and 45 are sandwiched and supported so as to be rotatable about the Y axis which is the vertical axis. The support arms 353 and 354 in the illustrated example extend in a tangential direction (or circumferential direction) after extending from the heat exchanger 35 radially outward of the hot water storage tank 4 in a state where the heat exchanger 35 is fitted in the notch 81. The bent portion is supported by the support portions 44 and 45 so as to be rotatable around the Y axis. The configuration of the support arms 353 and 354 is not limited to this, and simply extends outward in the radial direction of the hot water storage tank 4 from the heat exchanger 35 in a state where the heat exchanger 35 is fitted in the notch 81. Alternatively, the support arm may be configured by a heat exchanger or simply extending in the tangential direction or circumferential direction of the hot water storage tank 4 from the heat exchanger. In short, the heat exchanger 35 arranged so as to extend in the vertical direction can be supported so as to be rotatable around an axis (for example, the Y axis) extending in the vertical direction at a position different from the heat exchanger 35 in the plane direction. Any support arm may be used.

  The support portions 44 and 45 also serve as connection portions of the outgoing paths 361 and 372 or connection portions of the return paths 362 and 371, while the support arms 353 and 354 are configured by inner and outer double tubes similar to the heat exchanger 35. The outer tube portion 351 (see FIG. 2) and the inner tube portion 352 of the heat exchanger 35 are configured to communicate with the respective connection portions via the support arms 353 and 354. Thereby, the hot water of the hot water storage tank 4 circulated in the heat source circulation path 36 and the hot water of the bathtub 5 circulated in the bathtub water circulation path 37 are respectively present in the heat exchanger 35. In addition, the rotational movement operation around the Y axis of the heat exchanger 35 can be performed. In addition, as means for connecting the support portions 44 and 45 and the support arms 353 and 354 so as to be capable of rotational movement, for example, flanges may be protruded from both sides, and both flanges may be connected rotatably by a C-shaped clip or the like.

  In the case of the second embodiment described above, a predetermined portion corresponding to the tank thermistor installation position is cut up and down from the state covered with the heat insulating material 8 to form a cutout portion 81, and the tank thermistor is formed via this cutout portion 81. While installing 71, 72, and 73, the support arms 44 and 45 are connected to the support arms 353 and 354 to support the heat exchanger 35 so as to be rotatable about the Y axis. Then, the heat exchanger 35 is rotationally moved in the counterclockwise direction around the Y axis when viewed from the plane direction of FIG. 5 so as to be fitted in the notch portion 81, whereby the outer surface side of the tank thermistors 71, 72, 73 is Cover it. In this state, the tank thermistors 71, 72, 73 and the notch 81 are all covered by the heat exchanger 35, and are further insulated by the heat insulating function of the synthetic resin that is a material for forming the outer tube portion 351 of the heat exchanger 35. Performance will be maintained.

  Then, the heat exchanger 35 can be easily moved to the outside from the notch 81 by simply rotating the heat exchanger 35 in the clockwise direction in the opposite direction, and the tank is opened via the notch 81 in the open state. Maintenance (for example, check and replacement) of the thermistors 71, 72, and 73 can be easily performed. In this case, since the heat exchanger 35 and the heat source circulation path 36 and the bathtub water circulation path 37 are maintained in communication with each other, the hot water storage tank 4 and the heat source circulation path 36 are maintained for maintenance of the tank thermistors 71, 72, and 73. , It is not necessary to drain or stop the water in the bathtub water circulation path 37, etc., so that even if the heat exchanger 35 is used to cover the notch 81, the maintenance work can be greatly saved. It becomes like this. Furthermore, after the maintenance, the heat exchanger 35 is rotated counterclockwise around the Y axis and is reinserted into the notch 81, so that all of the tank thermistors 71, 72, 73 and the notch 81 are subjected to heat exchange. It can be covered with the vessel 35, and the same heat insulation performance as the original state before the removal of the heat exchanger 35 can be restored and exhibited.

<Other embodiments>
The present invention is not limited to the first and second embodiments described above, but includes other various embodiments. That is, instead of the brackets 43 and 43 of the first embodiment, for example, a bracket 43a as shown in FIG. 6 may be used. In this case, obstacles for installation and maintenance of the tank thermistors 71 to 73 can be solved even a little. In the first and second embodiments, an example in which the heat exchanger 35 is used as a piping member has been shown. However, the present invention is not limited thereto, and a flow path such as hot water in the hot water storage tank 4 is configured as shown in FIG. A simple pipe 300 may be used as a pipe member. In this case, the pipe 300 may be formed of a synthetic resin pipe having heat insulation properties, or may be formed by integrally covering the outer periphery with a synthetic resin heat insulating material on the pipe main body of the metal pipe. Note that the cross-sectional shape of the pipe 300 may be circular as shown in the figure, or may be rectangular similar to the outer tube portion 351 of the heat exchanger 35. Further, the outer tube portion 351 of the heat exchanger 35 may have a circular cross-sectional shape like the pipe 300. In addition, the heat exchanger 35 is not limited to the heat exchanger 35 for heating a bath, and a heat exchanger for heating hot water circulating heating water or other heat exchangers may be used as the piping member of the present invention. Also good.

  Further, in the second embodiment, by supporting the heat exchanger 35 that is a piping member so as to be rotatable about the Y axis, a state in which the heat exchanger 35 is fitted in the notch 81 and a state in which the heat exchanger 35 is moved to the outside However, the present invention is not limited to this. For example, by supporting the piping member so as to be slidable, the piping member can be moved between a state in which the piping member is fitted in the notch 81 and a state in which the piping member is moved to the outside. You may do it.

2 Heating means 4 Hot water storage tank 8 Insulating material 35 Heat exchanger (piping member)
71, 72, 73 Tank thermistor (temperature detection means)
81 Notch 300 Piping (Piping material)

Claims (4)

A hot water storage tank for storing hot water heated by the heating means is provided, and a temperature detection means for detecting the temperature of the hot water stored in the hot water storage tank is installed on a side surface of the hot water storage tank, and the hot water storage tank A hot water storage and hot water supply device whose outer surface is covered with a heat insulating material,
A portion of the heat insulating material corresponding to a portion facing the outer surface side of the temperature detecting means is cut out, and a cutout portion penetrating inward and outward is formed,
A piping member is detachably installed at the cutout portion so as to cover the outer surface side of the temperature detecting means, and the cutout portion is covered by the piping member.
A hot water storage hot water supply device characterized by that. The hot water storage and hot water supply device according to claim 1,
The said piping member is a hot water storage hot-water supply apparatus comprised by the piping main body and the heat insulating material attached integrally to the outer periphery of this piping main body. The hot water storage and hot water supply device according to claim 1 or 2,
The said piping member is a hot water storage hot-water supply apparatus supported so that a movement between the inside of the said notch part and the outside of a notch part is possible, maintaining the state which can distribute | circulate hot water in an inside. A hot water storage and hot water supply apparatus according to any one of claims 1 to 3,
The said piping member is a hot water storage hot-water supply apparatus comprised by the inner and outer double pipe type heat exchanger, and the outer pipe part being formed with the synthetic resin.

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