JP2004144438A - Hot water storage tank unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage tank unit in which piping connection work can be easily conducted, and in which a drain cap can be easily operated. <P>SOLUTION: The drain cap 41 is provided at the lowest part in the hot water storage tank unit 1 to drain hot water in a hot water storage tank 7. On the front surface side of the hot water storage tank unit 1, a piping connection part 53 where joints 52 to connect external piping to internal piping are concentrically disposed is provided. The piping connection part 53 is positioned between a top of the hot water storage tank 7 and a bottom part of it. A part above it is set as space for disposition of the internal piping and functional parts. A part below it is formed as a recessed part 51 to be set as space for connection of the external piping. A drain cap operation window 54 is opened in the recessed part 51 at a corresponding position to the drain cap 41. The joints 52 of the piping connection part 53 are disposed to avoid the drain cap operation window 54. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hot water storage tank unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this kind, there is one 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 therein for storing hot water, 103 is a hot water supply pipe connected to an upper end of the hot water storage tank 102, and 104 is a water supply pipe connected to a lower end of the hot water storage tank 102. .
[0003]
Further, on the front side of the bottom plate 105 of the hot water storage tank unit main body 101, there is provided a pipe connection portion 106 for connecting the tapping pipe 103 and the water supply pipe 104 to an external pipe.
[0004]
[Patent Document 1]
Design Registration No. 1050376
[Problems to be solved by the invention]
However, in this conventional device, since the pipe connection portion 106 is provided at a very low position, there is a problem that the work of connecting the pipe is difficult, and the workability is very poor.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a hot water storage tank unit having a hot water storage tank for storing hot water, wherein a drain plug for draining hot water in the hot water storage tank is provided at a lowermost portion in the hot water storage tank unit. A piping connection is provided on the front side of the hot water storage tank unit, in which joints for connecting the external piping and the internal piping are intensively arranged. The piping connection is provided between the top and bottom of the hot water storage tank. And the space above it is a space for arranging the pipes and functional parts in the instrument, and the space below it is a space for connecting the external piping as a step recess, and corresponds to the drain plug of the step recess. A drain cock operation window is opened at a position, and a joint of the pipe connection part is arranged at a position avoiding the drain cock operation window.
[0007]
According to a second aspect, a window cover that covers the drain cock operation window is detachably attached.
[0008]
According to a third aspect of the present invention, a decorative cover for covering the step recess is provided detachably on the front side of the step recess, and an opening is provided at a position facing the drain cock operation window. An opening cover for covering is detachably attached.
[0009]
As a result, the space for connecting the external piping can be increased without reducing the size of the hot water storage tank, so that even when the hot water storage tank unit is installed in a narrow place, a large space for the connection work can be secured, and the connection position can be increased. It does not force the operator to make a sloppy posture, greatly improving the workability of the pipe connection work, making it possible to connect the external pipes without difficulty, and furthermore, with the external pipes still connected Thus, the drain cock can be operated from the drain cock operating window, and the work becomes easy. By hiding the external piping connected with a decorative cover, it is possible to improve the appearance without deteriorating workability, and it is possible to operate the drain plug by removing and attaching the window cover with this decorative cover attached. It becomes.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a circuit diagram, 1 is a hot water storage tank unit, 2 is a heating unit composed of a heat pump unit, 3 is a hot water tap, 4 is a remote controller, 5 is a bathtub, and 6 is a power supply.
[0011]
The hot water storage tank unit 1 includes a hot water storage tank 7 for storing hot water, a hot water supply pipe 8 connected to an upper part of the hot water storage tank 7, a water supply pipe 9 connected to a lower part of the hot water storage tank 7, Mixing valve 11 for mixing water and low-temperature water from bypass pipe 10 branched from water supply pipe 9, hot water supply pipe 12 connected downstream of mixing valve 11, and hot water supply temperature sensor 13 provided on hot water supply pipe 12 A hot water supply flow sensor 14 provided on the hot water supply pipe 11, a water supply temperature sensor 15 provided on the water supply pipe 8, a hot water supply pipe 16 branched from the hot water supply pipe 12 and connected to the bathtub 5, and a hot water supply pipe A hot water filling valve 17 for opening and closing the hot water 16, a hot water filling flow rate sensor 18 for integrating the flow rate flowing through the hot water filling pipe 16, and an overpressure relief valve for releasing the overpressure of the hot water storage tank 7 branched and connected from the hot water supply pipe 8. 19 and the water pipe 8 A pressure reducing valve 20 for reducing the supplied water supply pressure, a plurality of hot water storage temperature sensors 21 provided in the vertical direction on the side surface of the hot water storage tank 7, and a hot water supply control unit mainly comprising a microcomputer for controlling the hot water storage 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]
The heating unit 2 includes a compressor 24 for compressing a carbon dioxide refrigerant, a refrigerant-water heat exchanger 25 as a condenser, a decompressor 26, and a heat pump circuit 28 including an air heat exchanger 27 as an evaporator. A blower 29 for blowing air to the air heat exchanger 27, a circulating pump 30 of variable capacity provided in the middle of the heating circulation circuit 23, and a coolant-water provided on the inlet side of the refrigerant-water heat exchanger 25 of the heating circulation circuit 23. A heat exchange inlet temperature sensor 31 for detecting the temperature of the hot and cold water flowing into the heat exchanger 25, and hot and cold water provided at the outlet of the refrigerant-water heat exchanger 25 of the heating circulation circuit 23 and flowing out of the refrigerant-water heat exchanger 25 And a heating control unit 33 mainly configured by a microcomputer for controlling the heating unit 2.
[0013]
Here, the power source 6 is a time zone light, and the power rate is set at a low price during the night (from 23:00 to 7:00 the following day). It is used to heat the amount of hot water stored on the day and use it during the daytime (from 7:00 to 23:00), and additional power is supplied when the remaining hot water becomes low. Boiling is performed. The power supply 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 33 (including electric power required for the heat pump circuit 27) by wire from the hot water supply control unit 22 so that the electric power is supplied. What is supplied.
[0014]
Then, in the night time zone, the hot water supply control unit 22 calculates the required amount of hot water storage on the next day, and instructs the heating control unit 33 to boil the target hot water storage amount by the end of the night time period, and instructs the heat pump The circuit 27 is operated to start driving the circulation pump 30 of the heating circulation circuit 23. Then, the hot and cold water taken out from the lower part of the hot water storage tank 7 by the drive of the circulation pump 30 flows into the refrigerant-water heat exchanger 25 of the heating unit 2 and is heated and returned to the upper part of the hot water storage tank 7 via the heating circulation circuit 23. As a result, high-temperature hot water is stored.
[0015]
Then, 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 more, the hot water supply control is performed. The unit 22 instructs 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.
[0016]
Here, the amount of heat stored in the hot water storage tank 7 is calculated by the hot water supply control unit 22 using the amount of heat considered appropriate from the hot water supply load for the past several days as the target hot water storage amount, and the temperature of the hot water stored. Varies in the range of 60 ° C. to 90 ° C. depending on the season (or the supply water temperature detected by the supply water temperature sensor 15) and the magnitude of the target hot water storage amount.
[0017]
The remote controller 4 has a temperature setting switch 34 for setting a hot water supply set temperature, a hot water switch 35 for instructing hot water to the bathtub 5, a hot water level setting switch 36 for setting the hot water level, and a remaining time for hot water supply. , A display unit 39 formed of a dot matrix type fluorescent display tube, and controls the operation unit 38 and the display unit 39, as well as the hot water supply control unit 22. A remote control control unit 40 mainly comprising a microcomputer for performing communication is provided. During normal operation, the hot water supply set temperature and time information set on the display unit 39 by the operation unit 38 and the hot water storage temperature sensor 21 are used for detection. The remaining hot water storage amount and the like are displayed. The display section 39 may be a dot matrix type liquid crystal display section.
[0018]
Next, when the hot-water tap 3 is opened, the high-temperature water in the upper part of the hot-water storage tank 7 is pushed out to the hot-water tap 8 by the feed pressure from the hot-water supply pipe 9, and the mixing valve 11 controlled by the hot-water control unit 22 controls the bypass pipe 10. The low-temperature water and the temperature detected by the hot water supply temperature sensor 13 are mixed so as to become the hot water supply set temperature set by the operation unit 37 of the remote controller 4, and the hot water is supplied through the hot water supply pipe 12.
[0019]
If the hot water supply amount 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 has been stored in the hot water storage tank 7. If the hot water is expected to run out, the necessary amount of heat is increased using daytime electric power at that time.
[0020]
Next, when filling the bathtub 5 with hot water, when the hot water switch 35 of the remote controller 4 is operated, the hot water supply control unit 22 opens the hot water valve 17 to start hot water filling and starts hot water filling. When it is detected that the accumulated flow rate after that has reached the filling level, the filling valve 17 is closed to complete filling.
[0021]
A manual drain plug 41 for draining hot water from the hot water storage tank 7 is provided in the middle of the heating circulation circuit 23 on the side of the hot water storage tank unit 1. It is located at the bottom.
[0022]
Meanwhile, as shown in FIGS. 2 to 7, the hot water storage tank unit 1 includes a hot water storage tank 7, a hot water pipe 8, a water supply pipe 9, an outgoing pipe 23A and a return pipe 23B of a heating circulation circuit 23 inside a unit housing 41. And the functional components such as the mixing valve 11 and the hot water supply controller 22 are housed.
[0023]
The hot water storage tank 7 is disposed behind the center in the unit housing 42, and the hot water storage tank 7 is supported by tank support legs 43. The unit housing 42 includes a front panel 44, a rear plate 45, left and right side plates 46 and 47, a top plate 48, and a bottom plate 49, between the top and the bottom of the hot water storage tank on the upper front side of the appliance main body relative to the bottom plate 49. A connection port mounting plate 50 is provided at a position at the height of the connection port, and a lower portion of the connection port mounting plate 50 is retreated to the inside of the device to provide a space for connecting an external pipe as a stepped recessed portion 51, and the upper portion thereof is overhanged and the front surface is overhanged. It is a space for accommodating each functional component and piping surrounded by the projecting portions of the panel 44 and the left and right side plates 46 and 47.
[0024]
The connection port mounting plate 50 is provided with a plurality of joints 52 for connecting the internal pipe and the external pipe, respectively, to form a pipe connection portion 53. The water supply pipe 9, hot water supply pipe 12, hot water supply pipe 16, heating circulation path 23 and the like inside the appliance are connected to piping outside the appliance via 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 controller control unit 40 is passed through a hole (not shown) opened in the connection port mounting plate 50.
[0025]
The step recess 51 has a shape in which at least a part thereof is substantially along the outer periphery of the hot water storage tank to secure a large space for connecting an external pipe. Here, one side of the step recess 51 is chamfered. With the shape, the space on the side of the device gradually increases, the length of the connection port mounting plate 50 developed inside the device increases, and the space between the pipes can be widened. The pipes can be arranged with a margin with respect to each other, and the space at hand when performing the pipe connection work is increased, so that the workability is greatly improved.
[0026]
Further, the pipe connection portion 53 is provided at a height of 300 mm or more from the lowermost surface of the instrument, so that the pipe work can be easily performed in a posture where the worker is crouched, and the external pipe is connected straight and securely. And liquid leakage at the joint 52 can be prevented.
[0027]
Here, if the height position of the pipe connection part 53 is lower than 300 mm, it is difficult for the worker to perform the plumbing work only by taking a crouching posture, and in some cases, a posture in which the worker crawls sideways on the installation surface. In the case where the external pipe is a flexible synthetic resin pipe, the pipe is connected in the middle of bending, and the pipe cannot be mounted straight to the joint 52. The liquid may leak. Conversely, 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 this embodiment, the height of the hot water storage tank unit 1 is set. Is 1800 mm, the upper limit of the height position of the pipe connection portion 53 is limited to about 700 to 800 mm. However, the upper limit cannot be determined without limitation. Thus, in one embodiment of the present invention, these problems can be solved at a stretch.
[0028]
In the step recess 51, a drain cock operation window 54 is opened at a position corresponding to the drain cock 41 provided at the lowermost part in the hot water storage tank unit 1, and the drain cock operation window 54 is provided. A covering window cover 55 is detachably attached. Here, the plurality of joints 52 of the pipe connection portion 53 are provided at positions that are shifted laterally from above the drain cock operation window 54 to avoid the drain cock operation window 54, and the window cover 55 is connected to the pipe in a state where the pipe is connected. And the drain plug 41 can be operated.
[0029]
After the external piping 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 piping is not visible. Since the decorative cover 51 is detachably attached to the step recess 50 by screwing, the appearance can be improved without deteriorating the workability of the pipe connection.
[0030]
In addition, an opening 57 is provided at a position of the decorative cover 56 facing the drain cock operation window 54, and an opening cover 58 that covers the opening 57 is detachably attached. For this reason, when operating the drain cock 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.
[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 size of the hot water storage tank, so that even when the hot water storage tank unit is installed in a narrow place, a large space for the connection operation is secured. It is possible to improve the workability of the pipe connection work without having to raise the connecting position and force the worker to have a sharp posture, and it is possible to connect the external pipes without difficulty, furthermore, The drain cock can be operated from the drain cock operating window while the external piping is connected, and this is an extremely excellent effect that the work becomes easy.
[0032]
In addition, the external piping connected with the decorative cover can be hidden, and the appearance can be improved without deteriorating the workability. This is a very excellent effect that it becomes possible.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of one 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 an AA ′ cross-sectional view of the hot water storage tank unit of the same embodiment.
FIG. 6 is a cross-sectional view of the hot water storage tank unit of the same embodiment, taken along line BB ′.
FIG. 7 is a sectional view taken along the line CC ′ of the hot water storage tank unit of the same embodiment.
FIG. 8 is a perspective view of the hot water storage tank unit of the embodiment with a decorative cover attached thereto.
FIG. 9 is a sectional view of a conventional hot water storage tank unit.
[Explanation of symbols]
1 Hot water storage tank unit 41 Drain tap 51 Step recess 52 Joint 53 Pipe connection 54 Drain tap operation window 55 Window cover 56 Makeup cover 57 Opening 58 Opening cover

Claims (3)

In a hot water storage tank unit having a hot water storage tank for storing hot water, a drainage plug for draining hot water in the hot water storage tank is provided at a lowermost portion of the hot water storage tank unit, and an external pipe and an instrument are provided on the front side of the hot water storage tank unit. A pipe connection part in which joints for connecting the pipes are centrally arranged is provided. This pipe connection part is located at a height between the top and the bottom of the hot water storage tank, and the pipes and functional parts in the apparatus are disposed above the pipe connection part. A space, and a space below the step recess is used as a space for connecting an external pipe, and a drain cock operation window is opened at a position corresponding to the drain plug in the step recess, and a joint of the pipe connection part is formed. A hot water storage tank unit, which is disposed at a position avoiding the drain cock operation window. The hot water storage tank unit according to claim 1, wherein a window cover that covers the drain cock operation window is detachably attached. On the front side of the step recess, a decorative cover for covering the step recess is detachably provided, and an opening is provided at a position facing the drain cock operation window, and an opening cover covering the opening is detachably attached. The hot water storage tank unit according to claim 1, wherein the hot water storage tank unit is attached.

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