JP5767537B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply apparatus for storing hot water heated by a heating means in a hot water storage tank.

  Conventionally, in this type of hot water storage hot water supply apparatus, in a hot water storage hot water supply apparatus having a hot water storage tank for storing hot water, an exterior case for storing the hot water storage tank, and a heating means for heating the hot water in the hot water storage tank, A plurality of joints for connecting an external pipe and an in-appliance pipe to the lower end of the housing space are formed as an accommodation space projecting to the front side of the instrument so that the in-appliance pipe and functional parts are arranged on the front side in the exterior case. And a joint mounting plate were provided, and the pipe connection portion was about 300 mm to 800 mm from the fixture installation surface.

JP2004-144437 JP 2010-281487 A

  However, with these conventional devices, when performing work to connect the pipe to the pipe connection portion, the operator squats down, or the upper body is bent deeply forward and the connection portion is looked into, forcing the work in an unreasonable posture. The workability was poor.

  Therefore, in order to solve the above problems, the present invention provides a hot water storage hot water supply apparatus having a hot water storage tank for storing hot water, an exterior case for storing the hot water storage tank, and heating means for heating the hot water in the hot water storage tank. A plurality of joints for connecting an external pipe and an in-appliance pipe to the lower end of the housing space are formed as an accommodation space projecting to the front side of the instrument so that the in-appliance pipe and functional parts are arranged on the front side in the exterior case. And a pipe connection portion comprising a joint mounting plate, and the pipe connection portion was set to a height of 900 mm to 1300 mm from the instrument installation surface.

Further, the outer casing comprises a front panel covering the front side of the accommodating space, and a side plate covering the instrument side, and a back plate for covering the instrument back, and bottom plate which covers the instrument bottom, a top plate for covering the instrument top , and a front plate covering the instrument front lower than the receiving space, the receiving space is formed between the front panel and molded insulation surrounding the hot water storage tank, at the height position of the front plate , the side plate, the back plate, the front plate was assumed to be arranged in close contact at least a portion thereof and molding heat insulating material, respectively.

  In addition, a piping retainer that suppresses external piping is provided on the front plate.

  According to the present invention, since the pipe connection portion has a height of 900 mm to 1300 mm from the fixture installation surface, it is possible to work in a posture that is not unreasonable during the work of connecting the pipe, and the workability can be improved and the accommodation space is reduced. Therefore, the internal piping of the appliance is shortened, the lead wire connecting the functional component and the control board can be shortened, the product cost can be reduced, and the internal piping of the appliance and the functional component are placed in a relatively high temperature part by heat radiation from the hot water storage tank. In combination with the arrangement, heat loss from piping during hot water supply is reduced and energy is saved, and the risk of freezing is also reduced.

  Moreover, although it becomes easy to be distorted because the area of the front plate below the accommodation space is widened by making the pipe connection portion 900 mm to 1300 mm from the fixture installation surface, the front plate is brought into close contact with the molded heat insulating material. Can be prevented from being deformed.

  In addition, the front plate can be provided with a pipe restrainer that suppresses the external pipe, and when the external pipe rises from the lower side of the instrument, it can be prevented from expanding to the front side of the instrument, and the external pipe can be positioned at a specified position.

Circuit diagram of one embodiment of the present invention Front view and side view of one embodiment of the present invention Front view of the same embodiment with the front panel removed AA sectional view of the same embodiment Perspective view of the same embodiment

Next, a hot water storage type hot water supply apparatus according to 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 means 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.

  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. Mixing valve 11 for mixing water and low-temperature water from water supply 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 provided in hot water supply pipe 12 13, a water temperature sensor 14 provided in the water supply pipe 9, a hot water flow rate sensor 15 provided in the hot water supply pipe 12, a hot water pipe 16 branched from the hot water supply pipe 12 and connected to the bathtub 5, and this hot water filling An overpressure relief that releases the overpressure of the hot water storage tank 7 that is branched from the hot water pipe 8 and connected to the hot water flow rate sensor 18 that integrates the flow rate flowing through the hot water pipe 16. On the valve 19 and the water supply pipe 8 Hot water supply control 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. Part 22.

  The hot water storage tank unit 1 includes a heating forward pipe 23 a that connects the bottom of the hot water storage tank 7 and the inlet of the heating means 2, and a heating return pipe 23 b that connects the upper part of the hot water storage tank 7 and the outlet of the heating means 2. A hot circulation circuit 23 for circulating hot water, a heating bypass pipe 24 branched from the middle of the heating return pipe 23b and connected to the water supply pipe 9 downstream of the pressure reducing valve 20, and hot water boiled by the heating means 2 are stored. A heating switching valve 25 that switches between returning to the upper part of the tank 7 or returning to the lower part of the hot water storage tank 7 through the heating bypass pipe 24 is provided.

  The heating means 2 includes a compressor 26 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 27 as a condenser, a decompressor 28, and a heat pump circuit 30 that includes an air heat exchanger 29 as an evaporator, A blower 31 for blowing air to the air heat exchanger 29, a variable capacity circulation pump 32 provided in the middle of the heating forward pipe 23a, and a refrigerant-water heat exchanger 27 provided near the inlet of the refrigerant-water heat exchanger 27a. A hot water inlet temperature sensor 33 for detecting the temperature of hot water flowing into the heat exchanger 27 and a hot water flowing out of the refrigerant-water heat exchanger 27 are provided near the outlet of the refrigerant-water heat exchanger 27 in the heating return pipe 23b. A heat exchange outlet temperature sensor 34 for detecting the temperature of the air, an outside air temperature sensor 35 for detecting the outside air temperature, and a heating control unit 36 mainly comprising a microcomputer for controlling the heating means 2; Equipped and are configured.

  The remote controller 4 includes a temperature setting switch 37 for setting a hot water supply set temperature, an operation unit 39 having a hot water filling switch 38 for instructing hot water filling to the bathtub 5, and a dot matrix type fluorescent display tube. In addition to controlling the display unit 40, the operation unit 39, and the display unit 40, the remote control unit 41 mainly includes a microcomputer that communicates with the hot water supply control unit 22, and includes a display unit during normal operation. 40, the hot water supply set temperature and time information set by the operation unit 39, the remaining hot water storage amount detected by the hot water storage temperature sensor 21, and the like are displayed.

  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 the 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 36 (including power necessary for driving the heat pump circuit 30). Power is supplied.

  When the night time zone is reached, the hot water supply control unit 22 calculates the amount of stored hot water necessary for the next day, and instructs the heating control unit 36 to boil up the target hot water storage amount by the end of the night time zone. 30 is activated, and the circulation pump 32 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 32 flows into the refrigerant-water heat exchanger 26 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.

  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 hot water has been stored, or when the heat exchange inlet temperature sensor 33 detects a predetermined temperature or higher, the hot water supply control is performed. The unit 22 commands the heating control unit 36 to stop the heating operation, the operations of the heat pump circuit 30 and the circulation pump 32 are stopped, and the hot water storage operation is completed by the end of the night time zone.

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. The temperature fluctuates in the range of 60 ° C. to 90 ° C. depending on the season (water supply temperature detected by the hot water storage temperature sensor 21 at the bottom) and the amount of target hot water storage.

  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 water supply bypass pipe 10 is mixed by the mixing valve 11 controlled by the hot water supply control unit 22. The low temperature water and the hot water supply temperature sensor 13 are mixed so that the temperature detected by the operation unit 39 of the remote controller 4 is mixed and hot water is supplied through the hot water supply pipe 12.

  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.

  Next, when filling the bathtub 5, when the filling switch 38 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.

  When it is detected via the outside air temperature sensor 35 that the outside air temperature has dropped below the start temperature of the freeze prevention operation in winter or the like, the hot water supply control unit 22 switches the heating switching valve 25 to the heating bypass pipe 24 side and performs heating control. The unit 36 is instructed to drive only the circulation pump 32. Then, the hot water in the heating circuit 23 is driven by the circulation pump 32 so that the refrigerant-water heat exchanger 27, the heating return pipe 23b, the heating switching valve 25, the heating bypass pipe 24, the water supply pipe 9, the hot water storage tank 7, and the heating forward. The freeze prevention operation is performed by circulating and flowing in the order of the pipe 23a.

  Next, the structure of the hot water storage tank unit 1 will be described with reference to FIGS. The hot water storage tank unit 1 that accommodates the hot water storage tank 7 is provided inside the outer case 42 such as a hot water outlet pipe 8, a water supply pipe 9, a water supply bypass pipe 10, a hot water filling pipe 16, a heating circulation circuit 23, and a heating bypass pipe 24. Electric actuators such as piping, mixing valve 11, hot water filling valve 17, heating switching valve 25, hot water supply temperature sensor 13, hot water supply temperature sensor 14, hot water supply flow sensor 15, hot water supply flow sensor 18, hot water storage temperature sensor 21, etc. Sensors, valves such as the pressure relief valve 19 and the pressure reducing valve 20, and functional parts such as the hot water supply control unit 22 are accommodated, and the hot water storage tank 7 is molded to reduce heat dissipation in the outer case 42. It is surrounded by a heat insulating material 43 and is configured to be supported by a tank support leg 44 so as to be independent.

  The exterior case 42 includes a front panel 45, a back plate 46, left and right side plates 47 and 48, a top plate 49, a front plate 50, and a bottom plate 51, and the front side of the molded heat insulating material 43 at the top of the instrument and the front panel 45. An accommodation space 52 protruding toward the front side of the instrument is formed so as to arrange the instrument internal piping and functional parts in between, and a joint mounting plate 53 is provided at the lower end of the storage space 52, and the joint mounting plate 53 includes an internal pipe. A plurality of joints 54 for connecting the external pipe and the external pipe are provided to constitute a pipe connection portion 55.

  The water supply pipe 9, hot water supply pipe 12, hot water filling pipe 16, heating forward pipe 23a of the heating circulation path 23, heating return pipe 23b, etc. are connected to the pipe outside the equipment through a plurality of joints 54 of the pipe connecting portion 55. The power supply line 56 from the power source 6, the power communication line 57 connecting the hot water supply control unit 22 and the heating control unit 36, and the remote control line 57 connecting the hot water supply control unit 22 and the remote control control unit 41 are connected to each other. It is passed through a wiring hole 59 opened in the mounting plate 53. The hot water supply control unit 22 includes an electronic circuit board 60, an earth leakage breaker 61 to which the power source 6 is connected, a heat pump terminal connection base 62, and a remote controller. A terminal connection base 63 is provided.

  And the space which connects external piping is ensured below the accommodation space 52 which protruded from the instrument, and the joint mounting plate 53 is provided at a height of 1000 mm from the installation surface on the lowermost surface of the instrument. The operator can easily perform piping work with an unreasonable posture, can connect the external piping straightly and reliably, and can prevent liquid leakage at the joint 54. Further, since the distance between the wiring hole 59 of the joint mounting plate 53 and the earth leakage breaker 61, the heat pump terminal connection base 62, and the remote control terminal connection base 63 is short, the connection of the power line 56, the power communication line 57, and the remote control line 58 is possible. Work becomes easy and noise resistance can be improved.

  Here, the front plate 50 below the accommodation space 52 is likely to be distorted because the position of the joint mounting plate 53 is increased, but the front plate 50 is brought into close contact with the molded heat insulating material 43 as shown in FIG. Thus, the strength is increased and the deformation of the front plate 50 is prevented.

  As shown in FIG. 5, a pipe restrainer 64 that suppresses the external pipe is provided at the middle height position of the front plate 50, and the front face of the external pipe due to the increased position of the joint mounting plate 53. The bulge to the side and side is suppressed. The pipe holding member 64 is configured such that the left and right ends are fixed to the front plate 50, and is suspended from the front plate 50 except for the left and right ends so as to be bridged to the left and right of the instrument front. When the external pipe is made of a material such as a bridged poly pipe, the external pipe swells to the front side of the instrument, especially in a layout where the external pipe is routed to the front side of the instrument through the space between the bottom plate 51 and the installation surface from the rear side of the instrument. Although it is easy, since the external piping is accommodated at a predetermined position by the piping restrainer 64, it is possible to appropriately attach the piping cover 65 that covers the mounting space of the external piping. The pipe cover 65 is attached to the joint mounting plate 53 and the pipe holding member 64 by screwing or the like, and conceals the external pipe and also can conceal the tank support leg 44 to improve the beauty of the hot water storage tank unit 1. It is.

  Thus, since the accommodation space 52 is small, the piping inside the appliance can be shortened, and further, the lead wire connecting the electric actuators and sensors and the hot water supply control unit 22 can be shortened, so that the product cost can be suppressed. At the same time, pipes through which hot water flows such as the hot water outlet pipe 8, the hot water supply pipe 12, the hot water filling pipe 16, and the heating return pipe 23b are also shortened, so that heat loss is reduced and energy saving is achieved. Can also save energy.

  In addition, since the storage space 52 is arranged in the upper part inside the appliance, the internal piping and the functional parts are located at a relatively high temperature due to heat radiation from the hot water storage tank 7 in which the hot water is stored for a long time. As a result, the risk of freezing is also reduced.

  Furthermore, since the heating bypass pipe 24 is connected to the water supply pipe 9 in the storage space 52 at a high position, most of the water supply pipe 9 can be simultaneously subjected to the freeze prevention operation during the freeze prevention operation of the heating circulation circuit 23. The number of anti-freezing heaters attached to the water supply pipe 9 can be reduced.

  The height of the joint mounting plate 53 from the device installation surface is preferably 900 mm or more and 1300 mm or less. If the height is 900 mm or less, it is impossible for the operator to squat down or to bend the upper body deeply and look into the connection part. If the work is inferior in workability and becomes 1300 mm or more, the joint mounting plate 53 is too high and inferior in workability, and the accommodation space 52 becomes too small. More preferably, when the joint mounting plate 53 is provided at a height of 950 mm or more and 1150 mm or less, both workability and accommodation can be achieved.

  The present invention is not limited to the above-described embodiment. For example, an electric heater disposed in the hot water storage tank 7 may be adopted as a heating means. The back plate 46 and the side plates 47 and 48 are The back plate 46 and the side plates 47 and 48 may be formed of two plate members, each of which may be an independent plate member, a single plate member bent, or the like. Moreover, although the number of the piping restrainers 64 is one in FIG. 5, you may make it provide two or more up and down.

2 Heating means 7 Hot water storage tank 42 Exterior case 43 Molded heat insulating material 45 Front panel 46 Back panel 47 Side panel 48 Side panel 49 Top panel 50 Front panel 51 Bottom panel 52 Housing space 53 Joint mounting plate 54 Joint 55 Piping connection 64 Piping restraint

Claims (2)

A hot water storage hot water supply apparatus having a hot water storage tank for storing hot water, an outer case for housing the hot water tank, and a heating means for heating the hot water in the hot water storage tank, wherein the upper part on the front side in the outer case is connected to the piping in the appliance and A storage space that protrudes to the front side of the instrument so as to place functional parts is provided, and a pipe connection portion including a plurality of joints and a joint mounting plate for connecting the external pipe and the internal pipe of the instrument is provided at the lower end of the storage space. The pipe connection portion has a height of 900 mm to 1300 mm from the appliance installation surface , and the exterior case has a front panel that covers the front side of the accommodation space, a side plate that covers the instrument side, a back plate that covers the instrument back, and an instrument bottom surface. A bottom plate covering the appliance, a top plate covering the appliance upper surface, and a front plate covering the appliance front below the accommodation space, the accommodation space surrounding the hot water storage tank Formed between the molded heat insulating material and the front panel, and at the height position of the front plate, the side plate, the back plate, and the front plate are each in close contact with the molded heat insulating material. A hot water storage type hot water supply apparatus characterized by being arranged .   The hot water storage type hot water supply apparatus according to claim 1, wherein a piping restrainer for restraining external piping is provided on the front plate.

Images