JP2006010149A - Horizontal water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a horizontal water heater capable of reducing the mixing of the water of high temperature and the water, and efficiently supplying the water of high temperature. <P>SOLUTION: This water heater has a tapping tube 5 for tapping the hot water from an upper part of a horizontal hot water storage tank 4 storing the hot water, a water supply pipe 7 for supplying the water to a lower part of the hot water storage tank 4, a water supply auxiliary pipe 9 communicating with the water supply pipe 7, having a plurality of water supply holes 11 and longitudinally extended on a bottom part of the hot water storage tank 4, a baffle plate 14 extended along the water supply auxiliary pipe 9 in parallel with the water supply auxiliary pipe 9 at a tapping port 13 of the tapping pipe 5 and having a width wider than the tapping port 13, and a mixing prevention means provided with a side plate 15 for mounting in the cross direction of the baffle plate 14. Thus a boundary face between the water of high temperature and the water in the hot water storage tank 4 can be stably kept, and the water of high temperature can be supplied as it is to the last. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a horizontal water heater.

A conventional horizontal water heater has a hot water discharge pipe for discharging water from the upper part of the hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, and a plurality of water supply holes communicating with the water supply pipe at the bottom of the hot water storage tank. This is a horizontal water heater with a water supply auxiliary pipe extending in the longitudinal direction. (See Patent Document 1)
JP 2002-286291 A

  However, in the conventional system, high temperature water is pushed out from one outlet at the top of the hot water storage tank, so a large local flow of high temperature water occurs near the outlet, and the water that has risen as a result of this is high temperature water and water. The hot water and water are mixed to lower the hot water temperature and the hot water cannot be supplied efficiently.

  In view of the above-mentioned problems, the present invention has a baffle plate extending along the water supply auxiliary pipe in parallel with the water supply auxiliary pipe at the hot water outlet and wider than the hot water outlet, and is attached in the front-rear direction of the baffle plate. An object of the present invention is to provide a mixing prevention means in which a side plate is formed, to reduce the mixing of high-temperature water and water, and to efficiently supply high-temperature water.

  A hot water discharge pipe for discharging hot water from the top of a horizontal hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, and a water supply having a plurality of water supply holes in communication with the water supply pipe at the bottom of the hot water storage tank The auxiliary pipe is extended in the longitudinal direction, and the hot water outlet has a baffle plate that is parallel to the water supply auxiliary pipe and extends along the water supply auxiliary pipe and wider than the hot water outlet. A mixing prevention means having a side plate for attachment was provided.

  According to the present invention, the hot water outlet has a baffle plate extending in parallel with the water supply auxiliary pipe in parallel with the water supply auxiliary pipe and wider than the hot water outlet, and the side plate for attachment is provided in the front-rear direction of the baffle plate. By providing the formed mixing prevention means, the water that has risen due to the local large flow of high-temperature water near the tap is bounced back by the baffle plate and circulates gently below the baffle plate, so the temperature is high. The interface between water and water can be kept stable, and high-temperature water can be supplied to the end with high-temperature water.

  Next, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a horizontal storage type hot water storage tank unit installed under the floor of the building, 2 is a heating means comprising a heat pump unit, and 3 is a piping unit connecting the hot water storage tank unit 1 and the heating means 2.

  The hot water tank unit 1 is connected to a horizontally long hot water storage tank 4 for storing hot water, a hot water discharge pipe 5 connected to the upper surface of the hot water storage tank 4, a return pipe 6 from the heating means 2, and a lower part of the hot water storage tank 4. A water supply pipe 7 and an outgoing pipe 8 toward the heating means 2 are connected to each other, and a cylindrical water supply auxiliary pipe 9 that communicates with the water supply pipe 7 and supplies water in the center of the hot water storage tank 4 extends in the longitudinal direction. It is provided and supported by two support legs 10, and the end portion is closed.

  Furthermore, a plurality of water supply holes 11 are provided at equal intervals on the upper side of the water supply auxiliary pipe 9, and a circular arc section is provided above the water supply auxiliary pipe 9 facing the water supply hole 11 toward the water supply auxiliary pipe 9. Direction changing means 12 is provided, and the water supply discharged upward from the water supply hole 11 is once flowed downward and then directed upward. The size of the direction changing means 12 is the water supply auxiliary pipe 9. The distance between the auxiliary water supply pipe 9 and the water supply auxiliary pipe 9 varies depending on the height of the hot water storage tank, but is optimally within 20 cm.

  The hot water outlet 13 of the hot water outlet pipe 5 is parallel to the auxiliary water supply pipe 9 and is one-third the length of the hot water storage tank 4 along the auxiliary water supply pipe 9 and twice the diameter of the hot water outlet 13. A baffle plate 14 having a width was extended, and a mounting side plate 15 having a length three times the diameter of the tap 13 was provided in the front-rear direction of the baffle plate 14.

  The heating means 2 includes a compressor 16 for compressing the refrigerant, a refrigerant-water heat exchanger 17 as a condenser, a pressure reducing valve 18 and an air heat exchanger 19 as an evaporator, and a heat pump circuit 20 and an air heat exchanger 19. A variable capacity circulation pump 23 provided in the middle of a circulation circuit 22 composed of a blower 21 for blowing air, the return pipe 6 and the forward pipe 8, and a refrigerant-water heat exchanger 17 inlet side of the circulation circuit 22. A heat exchange outlet temperature sensor 25 that detects the temperature of hot water flowing out from the heat exchanger 17 and a heating control unit 26 that controls the heating means 2 are provided.

  The piping unit 3 includes a mixing valve 28 that mixes high-temperature water from the tap water pipe 5 and low-temperature water from the branch pipe 27 branched from the water supply pipe 7, and a hot-water tap 29 connected downstream of the mixing valve 28. A hot water supply pipe 30, a hot water supply temperature sensor 31 provided in the hot water supply pipe 30, a hot water supply flow rate sensor 32 provided in the hot water supply pipe 30, and a hot water filling branched from the hot water supply pipe 30 and connected to the circulation circuit 34 of the bathtub 33. The pipe 35, the heat insulation heater 36 and the bath circulation pump 37 for keeping the bathtub water in the circulation circuit 34, the pressure reducing valve 38 for the water supply pipe 7 and the pressure relief valve 39 for the hot water discharge pipe 5, and these functional parts By concentrating on the piping unit 3, piping work during installation and maintenance work after installation can be performed easily and efficiently. In particular, the hot water tank unit 1 is installed under the floor of the building. It is one that is effective.

  Next, the operation of one embodiment of the present invention will be described. First, when heating the hot water in the hot water storage tank 4, the heating control unit 26 activates the heat pump circuit 20 and starts driving the circulation pump 23 of the circulation circuit 22. The hot water taken out from the lower part of the hot water storage tank 4 by driving the circulation pump 23 flows into the refrigerant-water heat exchanger 17 of the heating means 2 and is heated and returned to the upper part of the hot water storage tank 4 through the circulation circuit 22. Hot water is stored.

  Here, depending on the detection values of the heat exchange inlet temperature sensor 24 and the heat exchange outlet temperature sensor 25, the output of the heat pump circuit 20 and the capacity of the circulation pump 23 are appropriately adjusted so that the hot water to be heated becomes a predetermined high temperature. It is variable. Specifically, each output and capacity are adjusted by feedforward control and / or feedback control in accordance with detection values of the heat exchange inlet temperature sensor 24 and the heat exchange outlet temperature sensor 25.

  When a hot water storage temperature sensor (not shown) provided on the side surface of the hot water storage tank 4 detects that a predetermined amount of high temperature water has been stored, or when the heat exchange inlet temperature sensor 24 detects a predetermined temperature or higher. The hot water supply control unit 40 commands the heating control unit 26 to stop the heating operation, and the operations of the heat pump circuit 20 and the circulation pump 23 are stopped.

  On the other hand, when the hot water stored in the hot water storage tank 4 opens the hot water tap 29, the hot water in the upper part of the hot water storage tank 4 is pushed out to the hot water discharge pipe 5 by the pressure from the water supply pipe 7 and is controlled by the hot water supply control unit 40. The valve 28 mixes the low-temperature water in the branch pipe 27 and the temperature detected by the hot water supply temperature sensor 31 so as to reach a predetermined temperature, and supplies hot water through the hot water supply pipe 30. The predetermined temperature hot water is arbitrarily set by an operation remote controller (not shown).

  At this time, the water supply reduced by the use of the hot water supply flows into the hot water storage tank 4 at the water supply pressure. This water supply is discharged from the water supply hole 11 above the water supply auxiliary pipe 9 but above the water supply hole 11. The flow is divided into two parts on both sides along the circular arc shape while flowing downward while colliding with the direction changing means 12, and then flows downward from the both sides through the direction changing means 12. As the momentum is weakened, it is prevented from rising as a large water stream or a mass of water, and the interface between hot water and water is prevented from being destroyed. However, since hot water is pushed out from one location of the hot water outlet 13 at the time of hot water, the flow of hot water locally increases near the hot water outlet. The water rises due to the influence, but the water that has risen due to the baffle plate 14 is bounced back below the baffle plate 14 and circulates gently below the baffle plate 14. It is possible to keep the boundary surface between water and water stable, and hot water can be supplied to the end while keeping the high temperature water.

  In this embodiment, the length of the baffle plate 14 is one third of the length of the hot water storage tank 4 and the width is twice the diameter of the hot water outlet. However, the present invention is not limited to this. Set the length and width so that there is no decrease or increase in pressure loss. The side plate has a length that is three times the diameter of the tap, but is long enough to prevent circumferential flow.

Schematic configuration diagram of the hot water storage tank of the present invention Cross section of the hot water storage tank

Explanation of symbols

4 Hot water storage tank 13 Hot water outlet 14 Baffle plate 15 Side plate

Claims (1)

  A hot water discharge pipe for discharging hot water from the top of a horizontal hot water storage tank, a water supply pipe for supplying water to the lower part of the hot water storage tank, and a water supply having a plurality of water supply holes in communication with the water supply pipe at the bottom of the hot water storage tank In the case where the auxiliary pipe is extended in the longitudinal direction, the hot water outlet of the hot water pipe has a baffle plate extending in parallel with the auxiliary water supply pipe and extending along the auxiliary water supply pipe and wider than the hot water outlet. A horizontal water heater comprising a mixing prevention means in which a side plate for attachment is formed in the front-rear direction of the baffle plate.

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