JP2018109481A - Heating water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating water heater enabling each of heating operation, hot water supply operation and heating and hot water supply simultaneous operation, having a distribution valve with good water discharge performance and enabling good water delivery characteristics to be attained.SOLUTION: A heating water heater 1 includes: combustion means 2; a heat exchanger 10; a circulation passage 4 for connecting the heat exchanger and an external heating terminal; a circulation pump 11 provided in the circulation passage; a bypass passage 12 branched from the circulation passage and bypassing the heating terminal; a hot water supply heat exchanger 20 provided in the bypass passage; a water supply passage 19 for supplying clean water to the hot water supply heat exchanger; and a hot water supply passage 21 for supplying hot water heated by the hot water supply heat exchanger at a predetermined hot water supply set temperature. A branch portion of the bypass passage includes distribution means 30, 40 capable of adjusting a distribution ratio so as to enable each of heating operation, hot water supply operation and heating and hot water supply simultaneous operation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heating and hot water supply apparatus that performs heating by heating a heating medium with combustion heat and heats fresh water by heat exchange with the heating medium, and particularly performs heating operation and hot water supply operation at the same time. It relates to a possible heating and hot water supply apparatus.

  2. Description of the Related Art Conventionally, a heating and hot water supply apparatus that can be executed by switching between a heating operation and a hot water supply operation has been widely used. Such a heating and hot water supply apparatus includes a combustion means, a heat exchanger, a circulation passage connecting the heat exchanger and a heating terminal installed indoors, a circulation pump provided in the circulation passage, and a branch from the circulation passage. And a bypass passage for bypassing the heating terminal. At the branch portion between the circulation passage and the bypass passage, switching means that can be switched so that the heating medium flows through the circulation passage or the bypass passage is provided. The bypass passage is provided with a hot water supply heat exchanger, and a hot water supply passage for supplying clean water to the hot water supply heat exchanger and a hot water supply passage for supplying hot water from the hot water supply heat exchanger to a hot water tap and the like are respectively connected. ing.

  The heating heat medium flowing by the operation of the circulation pump is heated using the combustion heat of the combustion means in the heat exchanger. During the heating operation, the switching means is switched so that the heating heat medium flows through the circulation passage in order to use the heated heating medium at the heating terminal. The heated heating heat medium flows through the circulation passage, dissipates heat at the heating terminal, and returns to the heat exchanger.

  In the hot water supply operation, the switching means is switched so that the heating heat medium flows through the bypass passage in order to use the heated heating heat medium in the hot water supply heat exchanger. The clean water supplied from the water supply passage is heated by heat exchange with the heating heat medium in the hot water supply heat exchanger. The heating medium that has exchanged heat with tap water in the hot water heat exchanger returns to the heat exchanger. Hot water heated by the heat exchanger for hot water supply is supplied from a hot water tap through a hot water supply passage.

  Thus, the heating and hot water supply apparatus that switches between the heating operation and the hot water supply operation is inconvenient because there is a problem that the heating operation and the hot water supply operation cannot be performed simultaneously.

  Therefore, the present applicant has already proposed a heating and hot water supply apparatus capable of simultaneous heating and hot water supply operation in which heating operation and hot water supply operation are performed simultaneously by adjusting the distribution ratio of the distribution means of the heating heat medium (Japanese Patent Application No. 2006-146594). Issue). In the simultaneous heating and hot water supply operation, the circulating heating heat medium is distributed to the heating terminal and the hot water supply heat exchanger, and hot water is heated by the hot water supply heat exchanger to supply hot water.

  A plate heat exchanger is used as a heat exchanger for hot water supply. In the plate heat exchanger, since a plurality of passages having a small passage cross-sectional area are formed in parallel inside, the heating heat medium and hot water for hot water supply may not easily flow. Therefore, the structure which provides a channel | path with low water flow resistance in a plate-type heat exchanger like the plate-type heat exchanger of patent document 1, for example is known. Since the water flow resistance is low, the heating heat medium and hot water for hot water supply can easily flow through the plate heat exchanger, respectively.

Japanese Patent No. 5882491

  However, since the heating and hot water supply apparatus capable of simultaneous operation of heating and hot water supply includes a distribution valve larger than the three-way valve of the switching means as the distribution means, it is not easy to arrange in a limited space in the heating and hot water supply apparatus. Absent. In addition, this heating and hot water supply apparatus is also required to have good hot water supply characteristics during hot water supply and good drainage performance during maintenance. Moreover, in the structure of patent document 1, although the flow of a heating heat medium or the hot water for hot water supply becomes favorable, it is unknown about the hot-water characteristics including the channel | path etc. which are connected to a plate type heat exchanger, and drainage performance.

  An object of the present invention is a heating and hot water supply apparatus that can perform each of a heating operation, a hot water supply operation, and a simultaneous heating and hot water operation, and includes a distribution valve with good drainage performance and can realize good hot water supply characteristics. Is to provide.

  The first aspect of the present invention includes a combustion means, a heat exchanger, a circulation passage connecting the heat exchanger and an external heating terminal, a circulation pump provided in the circulation passage, and a branch from the circulation passage. Heating with a bypass passage bypassing the heating terminal, a hot water supply heat exchanger provided in the bypass passage, a water supply passage for supplying clean water to the hot water supply heat exchanger, and the hot water supply heat exchanger In the heating and hot water supply apparatus provided with a hot water supply passage for supplying hot water at a predetermined hot water supply set temperature, the branching portion of the bypass passage can perform each operation of a heating operation, a hot water supply operation, and a heating and hot water supply simultaneous operation. Distribution means capable of adjusting the distribution ratio is provided, the distribution means is a distribution valve having a hot water supply side outlet, a heat medium introduction port, and a heating side outlet formed in a cylindrical main body, and the hot water supply side The outlet, the heating medium inlet and the The tuft-side outlet is disposed in different directions at different positions in the axial direction of the main body, and the hot water supply-side outlet, the heating medium inlet, and the heating-side outlet with the axial direction of the main body horizontal. Are arranged to have the same height.

  According to the said structure, the height of the hot_water | molten_metal supply side exit of a distribution valve, a heat-medium introduction port, and a heating side exit is the same. For this reason, when the heating heat medium is discharged for maintenance or the like, the heating heat medium is unlikely to stay in the distribution valve, so that good drainage performance can be obtained. Also, since the height of the hot water supply side outlet and the heating medium introduction port are the same, when the heating operation is stopped and the circulation of the heating heating medium is stopped, even if the distribution valve closing function is incomplete, The flow of the heating heat medium in the distribution valve from the heat medium inlet port that uses convection as a driving force toward the hot water supply side outlet does not occur, and the heating heat medium does not flow into the hot water supply heat exchanger. Therefore, it is possible to prevent unexpected heating of hot water in the hot water supply heat exchanger and to obtain good hot water supply characteristics during hot water supply.

  According to a second invention, in the first invention, the hot water supply heat exchanger is a plate heat exchanger formed in a rectangular parallelepiped shape, and the distribution means has an axial direction of the main body portion for the hot water supply. It is arranged to be parallel to the longitudinal direction of the heat exchanger.

  According to the above configuration, since the distribution valve is arranged so that the axial direction which is the longitudinal direction of the distribution valve is parallel to the longitudinal direction of the hot water supply heat exchanger, the distribution valve is arranged in a limited space in the heating hot water supply apparatus. It becomes easy to dispose a heat exchanger for hot water supply and a distribution valve.

  ADVANTAGE OF THE INVENTION According to this invention, it is a heating hot-water supply apparatus which can perform each operation | movement of heating operation, hot-water supply operation, and simultaneous heating-hot-water supply operation, Comprising: The heating hot-water supply apparatus provided with the distribution valve with favorable drainage performance and realization of favorable hot-water supply characteristics Can be provided.

It is the schematic of the heating hot-water supply apparatus of this invention. It is a disassembled perspective view of the connection part of the distribution valve which concerns on Example 1, and the heat exchanger for hot water supply. It is the top view which connected the distribution valve which concerns on Example 1 to the heat exchanger for hot water supply. It is a disassembled perspective view of the connection part of the distribution valve which concerns on Example 2, and the heat exchanger for hot water supply. It is the top view which connected the distribution valve which concerns on Example 2 to the heat exchanger for hot water supply.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

Initially, the whole structure of the heating hot-water supply apparatus 1 of this invention is demonstrated based on FIG.
The heating hot water supply apparatus 1 circulates a heating heat medium heated using the heat generated in the combustion unit 2 between a heating terminal (not shown) installed in a room outside the heating hot water supply apparatus 1 and performs a heating operation. The hot water supply operation which adjusts the hot water heated using the heat of the heating heat medium to a predetermined hot water supply set temperature and supplies hot water is performed. Arrow F represents fuel supply, arrow AS represents air supply, arrow E represents exhaust gas, arrow D represents drainage, arrow CW represents water supply, arrow HW represents hot water supply, and arrow HS represents heating going , Arrow HR represents heating return, and arrow R represents heating heating medium replenishment.

  The heating hot water supply apparatus 1 includes a combustion unit 2 that is a combustion means, a heat exchanger 10, a circulation passage 4 that connects the heat exchanger 10 and a heating terminal provided indoors, and a heat exchanger 10 in the circulation passage 4. A circulation pump 11 and the like provided further upstream are provided. The combustion unit 2 burns fuel gas mixed with air. The heat exchanger 10 heats the heating heat medium by exchanging heat between the combustion gas generated in the combustion unit 2 and the heating heat medium.

  The heating and hot water supply apparatus 1 includes a bypass passage (first bypass passage 12), a hot water supply heat exchanger 20 provided in the first bypass passage 12, a water supply passage 19, a hot water supply passage 21, and the like. . The first bypass passage 12 is branched from the circulation passage 4 on the downstream side of the heat exchanger 10 to bypass the heating terminal, and joins the circulation passage 4 on the upstream side of the circulation pump 11. The water supply passage 19 supplies clean water to the hot water supply heat exchanger 20. The hot water supply passage 21 supplies hot water heated by the hot water heat exchanger 20 to a hot water tap or the like.

  Further, the heating and hot water supply apparatus 1 includes a control unit 7, and the above-described devices including the control unit 7 are accommodated in a case 8. The control unit 7 receives a detection signal from a temperature sensor, which will be described later, and operates the circulation pump 11 and the first distribution valve 30 to control the heating operation, the hot water supply operation, the heating hot water supply simultaneous operation, and the like.

Next, the circulation passage 4 will be described.
The circulation passage 4 includes a first temperature sensor 13 between the circulation pump 11 and the heat exchanger 10, and a second temperature sensor 14 on the downstream side of the heat exchanger 10. The first temperature sensor 13 detects the temperature of the heating heat medium flowing into the heat exchanger 10. The second temperature sensor 14 detects the temperature of the heating heat medium heated by the heat exchanger 10.

  A first distribution valve 30 serving as distribution means is provided at a branch portion between the circulation passage 4 and the first bypass passage 12. The first distribution valve 30 distributes the heating medium heated by the heat exchanger 10 to the circulation passage 4 and the first bypass passage 12, and the distribution ratio is adjustable.

  Between the heat exchanger 10 and the first distribution valve 30, a pressure release valve 16 for releasing the pressure in the circulation passage 4 is provided. On the upstream side of the circulation pump 11, a heating return temperature sensor 17 for detecting the temperature of the heating heat medium returning from the heating terminal is provided. A replenishment passage 18 for replenishing the heating heat medium is connected between the circulation pump 11 and the heating return temperature sensor 17.

Next, the heat exchanger 20 for hot water supply will be described.
The hot water supply heat exchanger 20 provided in the first bypass passage 12 is a plate heat exchanger formed in a rectangular parallelepiped shape. In the plate heat exchanger, a plurality of heat exchange plates are stacked to form a passage between the heat exchange plates. In the hot water supply heat exchanger 20, every other passage between the heat exchange plates flows so that the heating heat medium and the clean water supplied from the feed water passage 19 face each other without being mixed with each other. These heat exchange plates are provided with irregularities in order to increase the surface area and improve the heat exchange efficiency.

  As shown in FIGS. 1 and 2, a connection portion 29 a is formed at a heat medium inlet 29 that introduces a heating heat medium into the hot water supply heat exchanger 20. The connecting portion 29a is formed at the tip of the cylindrical passage portion 29b protruding from the hot water heat exchanger 20, the enlarged diameter portion 29c having a diameter larger than that of the passage portion 29b on the distal end side of the passage portion 29b, and the enlarged diameter portion 29c. The flange portion 29d is provided. In addition, the same connection part is formed in the same direction as the connection part 29a of the heat exchanger 20 for hot water supply at the heating medium outlet, the hot water inlet, and the hot water outlet, respectively. The hot water supply heat exchanger 20 is fixed to the case 8 on the surface side where the connection portions 29a and the like are not formed in a posture in which the longitudinal direction is horizontal.

Next, the water supply passage 19 and the hot water supply passage 21 will be described.
As shown in FIG. 1, the water supply passage 19 includes a second distribution valve 23, a flow rate adjustment valve 24, a hot water supply flow rate sensor 25, and an incoming water temperature sensor 26. The second distribution valve 23 distributes clean water to the water supply passage 19 and the hot water supply bypass passage (second bypass passage 22) branched from the water supply passage 19 in the second distribution valve 23, and the distribution ratio can be adjusted. is there. Therefore, the second distribution valve 23 is a flow rate adjusting means for adjusting the flow rate of clean water flowing through the second bypass passage 22. The flow rate adjustment valve 24 adjusts the flow rate of clean water entering the second distribution valve 23. The hot water supply flow rate sensor 25 detects the adjusted flow rate of clean water. The incoming water temperature sensor 26 detects the temperature of clean water entering the second distribution valve 23.

  The second bypass passage 22 joins the hot water supply passage 21 on the downstream side of the hot water supply heat exchanger 20. A hot water supply passage 21 between the joining portion of the hot water supply passage 21 and the second bypass passage 22 and the hot water supply heat exchanger 20 is provided with a hot water temperature sensor 27 serving as a temperature detecting means. The hot water temperature sensor 27 detects the temperature of hot water discharged from the hot water supply heat exchanger 20.

  A hot water temperature sensor 28 is provided at the downstream end of the hot water passage 21. The hot water supply temperature sensor 28 detects the hot water supply temperature of hot water in which hot water heated by the hot water supply heat exchanger 20 and hot water flowing through the second bypass passage 22 are mixed.

Next, the first distribution valve 30 will be described.
As shown in FIGS. 2 and 3, the first distribution valve 30 includes a cylindrical main body portion 31 and an adjustment drive portion 32 for adjusting a distribution ratio at one axial end portion of the main body portion 31. The main body 31 is provided with a hot water supply side outlet 33, a heat medium inlet 34, and a heating side outlet 35 at different positions in the axial direction and in different directions.

  The hot water supply side outlet 33 is disposed on the adjustment drive unit 32 side portion of the main body 31 so as to be directed radially outward of the main body 31. The heating-side outlet 35 is disposed at the other end in the axial direction of the main body 31 on the side opposite to the adjustment driving unit 32 in the direction opposite to the adjustment driving unit 32. The heat medium introduction port 34 is disposed at a position between the hot water supply side outlet 33 and the heating side outlet 35 in the axial direction of the main body 31 in the direction opposite to the direction of the hot water supply side outlet 33.

  The first distribution valve 30 is parallel to the longitudinal direction of the heat exchanger 20 for hot water supply having a rectangular parallelepiped shape, with the axial direction of the main body portion 31 being the longitudinal direction being parallel to the longitudinal direction of the heat exchanger 20 for hot water supply. It is arranged toward. At this time, the hot water supply side outlet 33, the heat medium introduction port 34, and the heating side outlet 35 are set to the same height. The hot water supply side outlet 33 is directly connected to the connection portion 29a of the heat medium inlet 29 of the hot water supply heat exchanger 20 using a connection fitting.

  The hot water supply side outlet 33 includes a cylindrical passage portion 33a and an enlarged diameter portion 33b whose outer diameter is larger than that of the passage portion 33a on the distal end side of the passage portion 33a. The enlarged diameter portion 33b is externally fitted to the enlarged diameter portion 29c of the connection portion 29a and is fixed by a connection fitting. For example, a quick fastener 36 can be used as the connection fitting. In addition, a seal member is disposed in the circumferential direction in the enlarged diameter portion 33 b, and the hot water supply side outlet 33 is watertightly connected to the connection portion 29 a of the heat medium inlet 29.

Next, the effect | action and effect of the heating hot-water supply apparatus 1 are demonstrated.
The first distribution valve 30 has a main body portion 31 whose axial direction is horizontal and parallel to the longitudinal direction of the rectangular parallelepiped hot water supply heat exchanger 20, and the hot water supply side outlet 33 faces the hot water supply heat exchanger 20. Therefore, the hot water supply side outlet 33, the heat medium introduction port 34, and the heating side outlet 35 have the same height. Accordingly, the first distribution valve 30 is arranged so that the heating medium flows in the horizontal direction inside the first distribution valve 30. Therefore, when the heating medium is discharged for maintenance or the like, the first distribution valve 30 has a heating medium. Does not stay and good drainage performance can be obtained.

  Further, since the heating medium introduction port 34 and the hot water supply side outlet 33 are the same height, when the heating operation is stopped and the circulation of the heating heat medium is stopped, the hot water supply from the heating medium introduction port 34 that uses natural convection as a driving force. No flow of the heating heat medium in the first distribution valve 30 toward the side outlet 33 occurs. Therefore, even if the closing function of the first distribution valve 30 is insufficient, the heating heat medium does not flow into the hot water supply heat exchanger 20. Therefore, unexpected heating of hot water in the hot water supply heat exchanger 20 can be prevented, and good hot water discharge characteristics during hot water supply can be obtained.

  In addition, since the axial direction of the main body 31 that is the longitudinal direction of the first distribution valve 30 is arranged in parallel to the longitudinal direction of the hot water supply heat exchanger 20, the first distribution valve 30 has a limited space in the heating and hot water supply apparatus 1. The 1 distribution valve 30 and the hot water supply heat exchanger 20 can be easily arranged.

  1 A of heating hot-water supply apparatuses of Example 2 differ in the structure of the connection part with the heat exchanger 20 for hot water supply of the 1st distribution valve 30 and the 1st distribution valve 30 of the said Example 1. FIG. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  As shown in FIGS. 4 and 5, the first distribution valve 40 includes a cylindrical main body portion 41 and an adjustment drive portion 42 for adjusting the distribution ratio at one axial end portion of the main body portion 41. . The main body 41 is provided with a hot water supply side outlet 43, a heat medium introduction port 44, and a heating side outlet 45 in different directions at different positions in the axial direction.

  The hot water supply side outlet 43 is disposed on the adjustment drive unit 42 side portion of the main body 41 toward the outer side in the radial direction of the main body 41. The heating-side outlet 45 is disposed at the other end in the axial direction of the main body 41 on the opposite side to the adjustment driving unit 42 in the direction opposite to the adjustment driving unit 42. The heat medium introduction port 44 is arranged at a position between the hot water supply side outlet 43 and the heating side outlet 45 in the axial direction of the main body 41 in the direction opposite to the direction of the hot water supply side outlet 43.

  The first distribution valve 40 is configured such that the axial direction of the main body 41, which is the longitudinal direction, is horizontal and parallel to the longitudinal direction of the rectangular parallelepiped hot water supply heat exchanger 20, and the hot water supply side outlet 43 is connected to the hot water supply heat exchanger 20. It is arranged toward. At this time, the hot water supply side outlet 43, the heat medium inlet 44, and the heating side outlet 45 are set to the same height.

  As shown in FIGS. 1, 4, and 5, the hot water supply side outlet 43 of the first distribution valve 40 is connected to the connection portion 29 a of the heat medium inlet 29 of the hot water supply heat exchanger 20 via a straight pipe 37. The hot water supply side outlet 43 of the first distribution valve 40 includes a cylindrical passage portion 43a, a diameter-expanding portion 43b formed so as to be larger in diameter than the passage portion 43a on the distal end side of the passage portion 43a, and a diameter-expanding portion 43b. It has a flange 43c formed at the tip.

  The straight pipe 37 is provided with enlarged diameter portions 38 and 39 whose outer diameters are enlarged at both ends thereof. The enlarged diameter portion 38 is externally fitted to the enlarged diameter portion 29 c of the heat medium inlet 29 and fixed by the first quick fastener 46 so as not to come off. The enlarged diameter portion 39 is externally fitted to the enlarged diameter portion 43 b of the hot water supply side outlet 43 and is fixed by the second quick fastener 47 so as not to come off. At this time, since the first and second quick fasteners 46 and 47 are close to each other so as to contact each other, the distance between the first distribution valve 40 and the hot water supply heat exchanger 20 is as short as possible through the straight pipe 37. Connected. Note that a seal member is disposed in the circumferential direction on each of the enlarged diameter portions 38 and 39 and is connected in a watertight manner.

  In the first and second quick fasteners 46 and 47, the flange portion 29 d of the heat medium inlet 29, the flange portion 43 c of the hot water supply side outlet 43, and the straight pipe 37 are arranged in the center in the width direction parallel to the axial direction of the straight pipe 37. Engaging portions for engaging the enlarged diameter portions 38 and 39 are provided. Therefore, the distance between the hot water supply side outlet 43 and the heat medium inlet 29 corresponds to the distance between the center in the width direction of the first quick fastener 46 and the center in the width direction of the second quick fastener 47. When the first and second quick fasteners 46 and 47 are the same size, this distance corresponds to the width of the first quick fastener 46 or the width of the second quick fastener 47.

Next, the operation and effect of the heating and hot water supply apparatus 1A will be described.
The first distribution valve 40 has the axial direction of the main body 41 horizontally and parallel to the longitudinal direction of the rectangular parallelepiped hot water supply heat exchanger 20, and the hot water supply side outlet 43 faces the hot water supply heat exchanger 20. Therefore, the hot water supply side outlet 43, the heat medium introduction port 44, and the heating side outlet 45 have the same height. Accordingly, the first distribution valve 40 is arranged so that the heating medium flows in the horizontal direction inside the first distribution valve 40. Therefore, when the heating medium is discharged for maintenance or the like, the first distribution valve 40 has a heating medium. Does not stay and good drainage performance can be obtained.

  Further, since the heating medium introduction port 44 and the hot water supply side outlet 43 have the same height, when the heating operation is stopped and the circulation of the heating heat medium is stopped, the hot water supply from the heating medium introduction port 44 that uses natural convection as a driving force. The flow of the heating heat medium in the first distribution valve 30 toward the side outlet 43 does not occur. Therefore, even if the closing function of the first distribution valve 40 is insufficient, the heating heat medium does not flow into the hot water supply heat exchanger 20. Therefore, unexpected heating of hot water in the hot water supply heat exchanger 20 can be prevented, and good hot water discharge characteristics during hot water supply can be obtained.

  In addition, since the axial direction of the main body 41, which is the longitudinal direction of the first distribution valve 40, is arranged in parallel to the longitudinal direction of the hot water supply heat exchanger 20, the first space is limited to a limited space in the heating and hot water supply apparatus 1A. It is possible to easily dispose the one distribution valve 40 and the hot water supply heat exchanger 20.

  In addition, those skilled in the art can implement the invention by adding various modifications to the embodiment without departing from the spirit of the invention, and the invention includes such modifications.

1,1A Heating water heater 2 Combustion section (combustion means)
4 Circulating passage 7 Control unit 8 Case 10 Heat exchanger 11 Circulating pump 12 First bypass passage (bypass passage)
19 Water supply passage 20 Hot water supply heat exchanger 21 Hot water supply passage 29 Heat medium inlet 30, 40 First distribution valve (distribution means)
31, 41 Main body 33, 43 Hot water supply side outlet 34, 44 Heat medium inlet 35, 45 Heating side outlet 36 Quick fastener (connection fitting)
37 Straight pipe 46 First quick fastener 47 Second quick fastener

Claims (2)

Combustion means, a heat exchanger, a circulation passage connecting the heat exchanger and an external heating terminal, a circulation pump provided in the circulation passage, and a branch from the circulation passage to bypass the heating terminal A bypass passage, a hot water supply heat exchanger provided in the bypass passage, a water supply passage for supplying clean water to the hot water heat exchanger, and hot water heated by the hot water heat exchanger In a heating and hot water supply apparatus having a hot water supply passage for supplying hot water at a hot water supply set temperature
The branch portion of the bypass passage is provided with a distribution means capable of adjusting a distribution ratio so that each operation of a heating operation, a hot water supply operation, and a heating and hot water simultaneous operation can be performed,
The distribution means is a distribution valve having a hot water supply side outlet, a heat medium introduction port, and a heating side outlet formed in a cylindrical main body,
The hot water supply side outlet, the heat medium introduction port and the heating side outlet are arranged in different directions at different positions in the axial direction of the main body,
A heating and hot water supply apparatus, wherein the hot water supply side outlet, the heating medium introduction port, and the heating side outlet are arranged at the same height with the axial direction of the main body being horizontal. The hot water heat exchanger is a plate heat exchanger formed in a rectangular parallelepiped shape,
2. The heating and hot water supply apparatus according to claim 1, wherein the distribution unit is disposed such that an axial direction of the main body is parallel to a longitudinal direction of the hot water heat exchanger.