JP3890286B2 - Hot water storage tank unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage tank unit.
[0002]
[Prior art]
Conventionally, this type has been disclosed in Patent Document 1, which will be described with reference to FIG.
101 is a hot water storage tank unit main body, 102 is a hot water storage tank provided in the hot water tank for storing hot water, 103 is a hot water pipe connected to the upper end of the hot water storage tank 102, and 104 is a water supply pipe connected to the lower end of the hot water storage tank 102. .
[0003]
A hot water supply pipe 103 and a water supply pipe 104 are connected to an external pipe on the front side of the bottom plate 105 of the hot water tank unit main body 101.
[0004]
[Patent Document 1]
Design Registration No. 1050376 Publication [0005]
[Problems to be solved by the invention]
However, in this conventional device, since the pipe connection portion 106 is provided at the lowest position of the instrument, there is a problem that it is difficult to connect the pipes and the workability is very poor.
[0006]
[Means for Solving the Problems]
Therefore, in order to solve the above-described problems, the present invention provides a hot water storage tank unit having a hot water storage tank for storing hot water in order to connect external piping and in-appliance piping to the front side of the hot water storage tank unit . A pipe connection part consisting of a plurality of joints and a connection port mounting plate is provided, and this pipe connection part is positioned at a height between the top and bottom of the hot water storage tank so that the joint faces downward , and the upper part is located inside the appliance. A space for arranging the piping and functional parts, and a space for connecting the external piping with the stepped recess as a lower portion thereof, and a shape in which at least a part of the stepped recess is generally along the outer periphery of the hot water storage tank , The shape of the step dent is a chamfered shape with at least one corner on the side surface side of the step dent so as to enlarge the hand space for performing the connection work .
[0008]
Moreover, in Claim 2 , the said piping connection part is provided in the height position of 300 mm or more from the instrument lowermost surface.
[0009]
According to a third aspect of the present invention, a decorative cover that covers the step dent is provided detachably on the front side of the step dent.
[0010]
This allows a large space for connecting the external piping without reducing the hot water storage tank, so even if a hot water storage tank unit is installed in a small place, a large space for connecting work can be secured, and the connecting position is The height is not increased and the operator is not forced to take an unreasonable posture. The workability of the pipe connection work is greatly improved, and the external pipe can be connected without difficulty. In addition, since the height position of the pipe connection part has been optimized, it is possible to easily perform piping work in a posture in which the operator squats down, and to connect the external pipe straight and surely, and to prevent liquid leakage at the connection part. Can be prevented. Moreover, if the external piping connected by the decorative cover is hidden, the appearance can be improved without deteriorating the workability.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
1 is a circuit diagram, 1 is a hot water storage tank unit, 2 is a heating unit comprising a heat pump unit, 3 is a hot water tap, 4 is a remote controller, 5 is a bathtub, and 6 is a power source.
[0012]
The hot water storage tank unit 1 includes a hot water storage tank 7 for storing hot water, a hot water pipe 8 connected to the upper part of the hot water storage tank 7, a water supply pipe 9 connected to the lower part of the hot water storage tank 7, and a high temperature from the hot water supply pipe 8. A mixing valve 11 for mixing water and low-temperature water from the bypass pipe 10 branched from the water supply pipe 9, a hot water supply pipe 12 connected downstream of the mixing valve 11, and a hot water supply temperature sensor 13 provided in the hot water supply pipe 12 A hot water flow rate sensor 14 provided in the hot water supply pipe 11, a hot water temperature sensor 15 provided in the water supply pipe 8, a hot water pipe 16 branched from the hot water pipe 12 and connected to the bathtub 5, and the hot water pipe A hot water filling valve 17 that opens and closes 16, a hot water filling flow rate sensor 18 that integrates the flow rate flowing through the hot water filling pipe 16, and an overpressure relief valve that releases an overpressure in the hot water storage tank 7 that is branched from the hot water discharge pipe 8. 19 and provided in the water supply pipe 8 A hot water supply control unit mainly composed of a pressure reducing valve 20 for reducing the supplied water pressure, a plurality of hot water temperature sensors 21 provided in the vertical direction of the side surface of the hot water tank 7, and a microcomputer for controlling the hot water tank unit 1. 22 and a heating circulation circuit 23 that connects the hot water storage tank 7 and the heating unit 2 to circulate hot water.
[0013]
The heating unit 2 includes a compressor 24 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 25 as a condenser, a decompressor 26, and a heat pump circuit 28 that includes an air heat exchanger 27 as an evaporator, A blower 29 for blowing air to the air heat exchanger 27, a variable capacity circulation pump 30 provided in the middle of the heating circulation circuit 23, a refrigerant-water heat exchanger 25 inlet side of the heating circulation circuit 23, and a refrigerant-water A hot water inlet temperature sensor 31 for detecting the temperature of hot water flowing into the heat exchanger 25 and hot water flowing out of the refrigerant-water heat exchanger 25 are provided on the outlet side of the refrigerant-water heat exchanger 25 of the heating circuit 23. The heat exchange outlet temperature sensor 32 for detecting the temperature of the heater and a heating control unit 33 mainly including a microcomputer for controlling the heating unit 2 are configured.
[0014]
Here, the power source 6 is an electric lamp according to the time zone, and is set at a low price for power charges at night (from 23:00 to 7:00 here). The amount of stored hot water needed for the day is boiled and used, and the electric light is also supplied in the daytime (from 7 o'clock to 23 o'clock). Boiling is performed. The power source 6 is connected to a hot water supply control unit 22, and a communication signal is superimposed from the hot water supply control unit 22 to the remote controller 4 and the heating control unit 33 (including power necessary for the heat pump circuit 27) in a wired manner. To be supplied.
[0015]
When the night time zone is reached, the hot water supply control unit 22 calculates the amount of hot water storage necessary for the next day, and instructs the heating control unit 33 to boil up the target hot water storage amount by the end of the night time zone. The circuit 27 is actuated to start driving the circulation pump 30 of the heating circulation circuit 23. Then, the hot water taken out from the lower part of the hot water storage tank 7 by driving the circulation pump 30 flows into the refrigerant-water heat exchanger 25 of the heating unit 2 and is heated, and is returned to the upper part of the hot water storage tank 7 through the heating circuit 23. As a result, hot water is stored.
[0016]
When the hot water storage temperature sensor 21 provided on the side surface of the hot water storage tank 7 detects that a predetermined amount of high-temperature water has been stored, or when the heat exchange inlet temperature sensor 31 detects a predetermined temperature or higher, the hot water supply control is performed. The unit 22 commands the heating control unit 33 to stop the heating operation, the operations of the heat pump circuit 28 and the circulation pump 30 are stopped, and the hot water storage operation is completed by the end of the night time zone.
[0017]
Here, the amount of heat stored in the hot water storage tank 7 is calculated by the hot water supply control unit 22 as a target amount of stored hot water based on the amount of heat that seems to be appropriate from the hot water supply load for the past several days. Varies in the range of 60 ° C. to 90 ° C. depending on the season (or the feed water temperature detected by the feed water temperature sensor 15) and the amount of target hot water stored.
[0018]
The remote controller 4 includes a temperature setting switch 34 for setting the hot water supply set temperature, a hot water filling switch 35 for instructing hot water filling to the bathtub 5, a hot water filling amount setting switch 36 for setting the hot water filling amount, and a remaining time for hot water supply. An operation unit 38 having a remaining time display switch 37 for displaying the display, a display unit 39 made of a dot matrix type fluorescent display tube, the operation unit 38 and the display unit 39, and the hot water supply control unit 22 A remote control unit 40 mainly composed of a microcomputer that performs communication is provided. During normal operation, the display unit 39 detects the hot water supply set temperature and time information set by the operation unit 38 and the hot water storage temperature sensor 21. The remaining hot water storage amount is displayed. The display unit 39 may be a dot matrix type liquid crystal display unit.
[0019]
Next, when the hot-water tap 3 is opened, the hot water in the upper part of the hot water storage tank 7 is pushed out to the hot water discharge pipe 8 by the water supply pressure from the water supply pipe 9, and the bypass pipe 10 is connected to the bypass pipe 10 by the mixing valve 11 controlled by the hot water control section 22. The low temperature water and the hot water temperature sensor 13 are mixed so that the temperatures detected by the operation unit 37 of the remote controller 4 are mixed and hot water is supplied via the hot water pipe 12.
[0020]
If the amount of hot water supply becomes larger than usual, the hot water supply control unit 22 detects that the remaining hot water storage amount detected by the hot water storage temperature sensor 21 has decreased during the daytime power hours, and the hot water is stored in the hot water storage tank 7. When hot water is expected to run out, the necessary amount of heat is increased using the daytime power at that time.
[0021]
Next, when filling the bathtub 5, when the filling switch 35 of the remote controller 4 is operated, the hot water supply control unit 22 opens the filling valve 17 to start filling, and starts filling. When it is detected that the accumulated flow rate has reached the amount of filling, the filling valve 17 is closed and the filling is completed.
[0022]
A manual drain plug 41 for draining hot water in the hot water storage tank 7 is provided on the hot circulation circuit 23 side of the hot water storage tank unit 1. It is arranged at the bottom.
[0023]
2 to 7, the hot water storage tank unit 1 includes a hot water storage tank 7, a hot water discharge pipe 8, a water supply pipe 9, an outgoing pipe 23A and a return pipe 23B of the heating circuit 23, as shown in FIG. The internal components such as piping and functional parts such as the mixing valve 11 and the hot water supply control unit 22 are accommodated.
[0024]
The hot water storage tank 7 is arranged on the rear side of the center inside the unit housing 42, and the hot water storage tank 7 is supported by the tank support legs 43. The unit housing 42 is composed of a front panel 44, a back plate 45, left and right side plates 46, 47, a top plate 48, and a bottom plate 49, and is located between the top and bottom of the hot water storage tank on the front side of the appliance body relative to the bottom plate 49. A connection port mounting plate 50 is provided at a height, and the lower part of the connection port mounting plate 50 is retreated to the inside of the instrument to form a space for connecting external piping as a stepped recess 51, and the upper part overhangs and the front panel 44 and a space for storing each functional component and piping surrounded by the protruding portions of the left and right side plates 46 and 47.
[0025]
The connection port mounting plate 50 is provided with a plurality of joints 52 that respectively connect an internal pipe and an external pipe to form a pipe connection portion 53. The water supply pipe 9, the hot water supply pipe 12, the hot water filling pipe 16, the heating circuit 23, and the like inside the appliance are connected to the piping outside the appliance through the plurality of joints 52, and the hot water supply control unit 22 and the heating control are connected. The communication wiring (not shown) connected to the unit 33 and the remote control unit 40 is passed through a hole (not shown) opened in the connection port mounting plate 50.
[0026]
The step recess 51 has a shape in which at least a part thereof is generally aligned with the outer periphery of the hot water storage tank so as to ensure a large space for connecting external piping. Here, a corner of the side of the step recess 51 is chamfered. With the shape, the space on the side of the instrument gradually increases, the length of the connection port mounting plate 50 that is developed inside the instrument becomes longer, and the distance between the pipes can be widened. It is possible to arrange the pipes with a margin, and the space at the time of pipe connection work is increased, and the workability is greatly improved.
[0027]
In addition, the pipe connecting portion 53 is provided at a height position of 300 mm or more from the lowermost surface of the instrument, so that the piping work can be easily performed in a posture in which the worker squats down, and the external pipe is connected straight and surely. The liquid leakage at the joint 52 can be prevented.
[0028]
Here, if the height of the pipe connection portion 53 is lower than 300 mm, it is difficult to perform the piping work only by taking the posture where the operator squats down, and in some cases, the posture is such that it lies on the installation surface. You may be forced to work in Also, when the external piping is a synthetic resin pipe such as a crosslinked polyethylene pipe, the pipe has a large bending radius, so the pipe is connected while it is bent, and can be attached straight to the joint 52. There is a possibility of leaking without being able to. On the other hand, if the height position of the pipe connection portion 53 is too high, the space for storing the internal pipe and each functional component becomes too narrow. In the case of this embodiment, the height of the hot water storage tank unit 1 is thus reduced. Is 1800 mm, the upper limit of the height position of the pipe connecting portion 53 is about 700 to 800 mm, but the upper limit cannot be determined in general. Thus, in one embodiment of the present invention, these problems can be solved at once.
[0029]
The step recess 51 is provided with a drain plug operation window 54 at a position corresponding to the drain plug 41 provided at the lowermost part of the hot water storage tank unit 1. A covering window cover 55 is detachably attached. Here, the joint 52 of the pipe connection portion 53 is shifted from the upper side of the drain valve operation window 54 so as to avoid the drain valve operation window 54, and the window cover 55 is attached and detached while the pipe is connected. Thus, the drain plug 41 can be operated.
[0030]
Then, after the external pipe is connected, a removable decorative cover 56 that covers the stepped recess 51 is attached as shown in FIG. 8 so that most of the external pipe is not visible. Since this decorative cover 51 is detachably attached to the step recess 50 by screwing, the appearance can be improved without deteriorating the workability of pipe connection.
[0031]
In addition, an opening 57 is provided at a position of the decorative cover 56 facing the drain plug operation window 54, and an opening cover 58 covering the opening 57 is detachably attached. For this reason, when operating the drain plug 41, by removing the opening cover 58 of the decorative cover 56 and removing the window cover 55 of the step recess 51, without removing the decorative cover 56 with the pipe connected, The drain plug 41 can be operated through the opening 57 and the drain plug operation window 54.
[0032]
In addition, this invention is not limited to this one Embodiment, For example, as a shape which followed at least one part of the said level | step-difference recessed part 51 along the outer periphery of the hot water storage tank 7, it shows in FIGS. Thus, both the left and right sides of the step recess 51 are chamfered to ensure a large space on the side of the instrument, or the step recess 51 is inclined downward as shown in FIGS. At the same time, both the left and right sides can be chamfered to secure a large space below and on the side of the appliance, and it is not necessary to strictly follow the outer periphery of the hot water storage tank 7.
[0033]
【The invention's effect】
As described above, according to the present invention, the space for connecting the external piping can be increased without reducing the hot water storage tank, so that a large space for connecting work can be ensured even if the hot water storage tank unit is installed in a narrow place. The connection position is high and the operator is not forced to give a gritty posture. The workability of the pipe connection work is greatly improved and the external pipe can be connected without difficulty. It has an excellent effect.
[0034]
In addition, the external piping connected by the decorative cover can be hidden, and an excellent effect that the appearance can be improved without deteriorating workability is achieved.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of an embodiment of the present invention.
FIG. 2 is a front view of the hot water storage tank unit of the same embodiment.
FIG. 3 is a left side view of the hot water storage tank unit of the same embodiment.
FIG. 4 is a right side view of the hot water storage tank unit of the same embodiment.
FIG. 5 is a cross-sectional view of the hot water storage tank unit taken along the line AA ′ in the same embodiment.
FIG. 6 is a BB ′ sectional view of the hot water storage tank unit of the same embodiment.
FIG. 7 is a cross-sectional view taken along the line CC ′ of the hot water storage tank unit of the same embodiment.
FIG. 8 is a perspective view in a state in which a decorative cover is attached to the hot water storage tank unit of the same embodiment.
FIG. 9 is a front view of a hot water storage tank unit according to another embodiment of the present invention.
FIG. 10 is a left side view of a hot water storage tank unit according to another embodiment.
FIG. 11 is a right side view of a hot water storage tank unit according to another embodiment.
FIG. 12 is a DD ′ cross-sectional view of a hot water storage tank unit according to another embodiment.
FIG. 13 is an EE ′ cross-sectional view of a hot water storage tank unit according to another embodiment.
FIG. 14 is a front view of a hot water storage tank unit according to still another embodiment of the present invention.
FIG. 15 is a left side view of a hot water storage tank unit according to another embodiment.
FIG. 16 is a cross-sectional view of the hot water storage tank unit taken along line FF ′ according to still another embodiment.
FIG. 17 is a sectional view of a conventional hot water storage tank unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hot water storage tank unit 7 Hot water storage tank 51 Step recessed part 53 Piping connection part 56 Cosmetic cover

Claims (3)

In the hot water storage tank unit having a hot water storage tank for storing hot water, a pipe connection portion comprising a plurality of joints and connection port mounting plates for connecting external piping and instrument internal piping is provided on the front side of the hot water storage tank unit, This pipe connecting part is positioned at the height between the top and bottom of the hot water storage tank so that the joint faces downward , and the upper part is used as a space for arranging the in-appliance pipes and functional parts, and the lower part is a stepped recess. with a space for connecting an external pipe as a part, at least part was roughly along allowed geometry in the hot water storage tank periphery, the shape of the stepped recessed part, at least one corner of the side surface of the step recess of the step recess A hot water storage tank unit characterized by a chamfered shape and a large hand space for connection work . Hot water storage tank unit according to claim 1, characterized in that provided in the pipe connection portion of 300mm or more height from the instrument bottom surface. The hot water storage tank unit according to claim 1 or 2 , characterized in that a decorative cover for covering the step dent is provided detachably on the front side of the step dent.

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