JP4037782B2 - 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, the pipe connecting portion 106 is provided at the lowest position of the appliance, so there is a problem that it is difficult to connect the pipe, and workability is very bad. In addition, a multifunctional hot water storage tank unit body that also performs heating is provided, and more and more piping space is required, and connection work is complicated and troublesome.
[0006]
[Means for Solving the Problems]
Accordingly, 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 the hot water storage tank unit, an external pipe and an in-appliance pipe are connected to the front side of the hot water storage tank unit. This pipe connection part is located at the height between the top and bottom of the hot water storage tank, the upper part is used as a space for placing the piping in the appliance and the functional parts, and the lower part is used as a step recess part. A space for connecting the external piping, and at least a part of the stepped recess is formed along the outer periphery of the hot water storage tank to form an oblique cut, and this is a heating piping consisting of a forward header and a return header A reinforcing bracket is provided at a position opposite to the weight functional component mounting portion such as a circulation pump in the oblique cut portion, and the reinforcing header includes the forward header. And it is obtained by forming a holding portion for holding one end of the return header.
[0008]
As a result, the connection specific to the heating pipe, which is called back and forth, is performed in a dedicated place, so that the connection work is easily performed and the connection part fits neatly without jumping forward. Since the space for connecting the external piping can be increased without reducing the size, even if the hot water storage tank unit is installed in a small space, a large space can be secured for the connection work, and the connection position becomes higher for the operator. There is no forced posture, the workability of pipe connection work is greatly improved, and external pipes can be connected without difficulty. In addition, because the height position of the pipe connection part has been optimized, piping work can be easily performed in a posture where the operator squats down, and the external pipe can be connected straight and surely, and liquid leakage at the connection part can be prevented. Can be prevented.
[0009]
Also, even if the heating pipe connection part is composed of a forward header and a return header, it is an oblique cut part, so it can be securely connected without worrying about jumping forward, and further, the header is attached to the reinforcement bracket of the weight functional part mounting part. By providing this holding part, the rotation at the time of connecting the header is prevented together with the reinforcement, and the connection is simplified.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram, in which 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.
[0011]
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.
[0012]
24 is a heating heat exchanger for circulating the hot water in the upper part of the hot water storage tank 7 by driving the primary pump 25 and heating the secondary hot water. The hot water after the heat exchange is returned to the lower part of the hot water tank 7 again. The heated secondary side hot water is heated by the radiator 28 such as floor heating from the forward pipe 27 by driving the secondary side pump 26, and then the secondary side hot water whose temperature has dropped is heated again from the return pipe 29. The circulation of returning to the heat exchanger 24 for heating and heating is repeated.
[0013]
The heating unit 2 includes a compressor 30 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 31 as a condenser, a decompressor 32, and a heat pump circuit 34 that includes an air heat exchanger 33 as an evaporator, A blower 35 for blowing air to the air heat exchanger 33, a variable capacity circulation pump 36 provided in the middle of the heating circulation circuit 23, a refrigerant-water heat exchanger 31 inlet side of the heating circulation circuit 23, and a refrigerant-water A hot water inlet temperature sensor 37 for detecting the temperature of hot water flowing into the heat exchanger 31 and hot water flowing out of the refrigerant-water heat exchanger 31 provided on the outlet side of the refrigerant-water heat exchanger 31 of the heating circuit 23. The heat exchange outlet temperature sensor 38 for detecting the temperature of the heating unit and a heating control unit 39 mainly composed of a microcomputer for controlling the heating unit 2 are provided.
[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 on the remote controller 4 and the heating control unit 39 (including power necessary for the heat pump circuit 34) from the hot water supply control unit 22 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 required for the next day, and instructs the heating control unit 39 to boil up the target hot water storage amount by the end of the night time zone. The circuit 34 is activated, and the circulation pump 36 of the heating circulation circuit 23 is started to be driven. Then, the hot water taken out from the lower part of the hot water storage tank 7 by driving the circulation pump 36 flows into the refrigerant-water heat exchanger 31 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 37 detects a predetermined temperature or higher, the hot water supply control is performed. The unit 22 commands the heating control unit 39 to stop the heating operation, the operations of the heat pump circuit 34 and the circulation pump 36 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 40 for setting a hot water supply set temperature, a hot water filling switch 41 for instructing hot water filling to the bathtub 5, a hot water filling amount setting switch 42 for setting the hot water filling amount, and a remaining time for hot water supply. An operation unit 44 having a remaining time display switch 43 for displaying the display, a display unit 45 made of a dot matrix type fluorescent display tube, the operation unit 44 and the display unit 45, and the hot water supply control unit 22 A remote control unit 46 mainly composed of a microcomputer for communication is provided. During normal operation, the display unit 45 detects the hot water supply set temperature and time information set by the operation unit 44 and the hot water storage temperature sensor 21. The remaining hot water storage amount is displayed. The display unit 45 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 temperature detected by the operation unit 44 of the remote controller 4 is mixed and hot water is supplied through 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 41 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 47 for draining the hot water in the hot water storage tank 7 is provided in the middle of the hot circulation circuit 23 on the hot water storage tank unit 1 side. It is arranged at the bottom.
[0023]
By the way, as shown in FIGS. 2 to 5, the hot water storage tank unit 1 has a hot water storage tank 7, a hot water discharge pipe 8, a water supply pipe 9, an outlet pipe and a return pipe of the heating circuit 23, heating, as shown in FIG. The heat exchanger 24 for use, the forward pipe 27, the return pipe 29, and other internal components of the instrument, and the mixing valve 11, the hot water supply controller 22, the primary side, the secondary side pumps 25, 26, and other functional parts are housed. ing.
[0024]
The hot water storage tank 7 is arranged on the rear side of the center inside the unit casing 48, and the hot water storage tank 7 is supported by tank support legs 49. The unit housing 48 includes a front panel 50, a back plate 51, left and right side plates 52 and 53, a top plate 54, and a bottom plate 55, and is located between the top and bottom of the hot water storage tank 7 on the front side of the appliance body relative to the bottom plate 55. A connection port mounting plate 56 is provided at a position at a height, and the lower portion of the connection port mounting plate 56 is retreated to the inside of the instrument to form a space for connecting external piping as a stepped recess 57, with the upper part overhanging and the front surface It is a space for housing each functional component and piping surrounded by the protruding portions of the panel 50 and the left and right side plates 52 and 53.
[0025]
The connection port mounting plate 56 is provided with a plurality of joints 58 that respectively connect an internal pipe and an external pipe to form a pipe connection portion 59. The water supply pipe 9, the hot water supply pipe 12, the hot water filling pipe 16, the heating circulation path 23, and the like inside the appliance are connected to piping outside the appliance through the plurality of joints 58, and the hot water supply control unit 22 and the heating control are connected. Communication wiring (not shown) connected to the unit 39 and the remote control unit 46 is passed through a hole (not shown) opened in the connection port mounting plate 56.
[0026]
The step recess 57 is formed with an oblique cut portion 60 having a shape that is at least partially along the outer periphery of the hot water storage tank to ensure a large space for connecting external piping. Here, the step recess One side of 57 has a chamfered shape, and the space on the side of the appliance is gradually increased to form a heating pipe connecting portion 61. A heating joint 62 and a heating return joint 63 are provided toward the front, and are limited. In addition, a large number of pipes can be arranged with sufficient margins within the horizontal width, and the space at the time of pipe connection work is increased, so that workability is greatly improved.
[0027]
Further, the heating pipe connecting portion 61 includes a forward header 64 connected to a plurality of heating locations and a return header 65 connected to a return from the plurality of heating locations, respectively, a heating forward joint 62 and a heating return joint 63. It is connected to the.
[0028]
On the other hand, since the upper space of the diagonal cut portion 60 is the widest space at the corner, the weight function component mounting portion to which the weight function components such as the heating heat exchanger 24, the primary pump 25, the secondary pump 26, and the like are mounted. 66 is provided with a reinforcing metal fitting 67 for supporting the upper weight functional component. The reinforcing metal fitting 67 is vertically fixed to the oblique cut portion 60 so as to support the upper weight functional component. The front end portion is formed with a holding portion 68 made of a hole for holding one end of the forward header 64 and the return header 65, which serves as a detent when the headers 64 and 65 are attached, making connection work easier. To do.
[0029]
Thereby, the general piping connection called hot water supply and water supply is performed easily using the large space of the level | step-difference recessed part 57, and the diagonal cut part 60 further recessed in the back was made into the exclusive connection part of heating piping. Thus, troublesome connection while checking the piping can be performed very easily, and the forward header 64 and the return header 65 taking a relatively large space can be stored neatly without protruding to the front. .
Also, one end of each of the headers 64 and 65 is held by a reinforcing metal fitting 67 that also serves as a reinforcement for the weight function component mounting portion 66, and serves as a detent at the time of fixing. Is to be done.
[0030]
The step recess 57 is provided with a drain plug operation window 69 at a position corresponding to the drain plug 47 provided at the lowermost part in the hot water storage tank unit 1. A covering window cover 71 is detachably attached. Here, the joint 58 of the pipe connection part 59 is shifted from the upper side of the drain valve operation window 69 so as to avoid the drain valve operation window 69, and the window cover 70 is attached and detached with the pipe connected. Thus, the drain plug 47 can be operated.
[0031]
【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 an uncomfortable posture. The workability of the pipe connection work is greatly improved and the external pipe can be connected without difficulty. It is effective.
[0032]
In addition, the diagonal cut part recessed in one corner of the step dent part is used as a dedicated connection part for heating piping, making troublesome connection while checking the piping extremely easy and a forward header that takes up a relatively large space And it can be stored neatly without protruding the return header to the front.
[0033]
In addition, one end of each header is held by a reinforcing metal fitting that also serves as a reinforcement of the weight functional component mounting portion, and serves as a detent when fixed. Therefore, no detent component is required and the connection work is easily performed. .
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.
FIG. 2 is a front view of the hot water storage tank unit.
FIG. 3 is a longitudinal sectional view of the hot water storage tank unit.
FIG. 4 is a front view showing a state in which each header is attached to the hot water storage tank unit.
FIG. 5 is a BB ′ sectional view of the hot water storage tank unit of the same embodiment.
FIG. 6 is a cross-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 57 Step recessed part 59 Piping connection part 60 Diagonal cut part 61 Heating piping connection part 64 Outward header 65 Return header

Claims (1)

In a hot water storage tank unit having a hot water storage tank for storing hot water, a pipe connection portion for connecting an external pipe and an instrument internal pipe is provided on the front side of the hot water storage tank unit, and this pipe connection portion is connected to the top of the hot water storage tank. It is located at the height between the bottoms, and the upper part is used as a space for placing the in-appliance pipes and functional parts, and the lower part is used as a step recess part to connect the external pipe, and at least one of the step recess parts. The slant cut part of the shape that is generally aligned with the outer periphery of the hot water storage tank is formed, and this is used as a heating pipe connection part composed of a forward header and a return header. the component attachment portion and a position opposed to the reinforcing metal fitting is provided, that the reinforcing metal fitting to form a holding portion for holding one end of the forward header and return header Hot water storage tank unit to the butterfly.

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