AU2017304850B2 - Heating and hot water supplying device - Google Patents
Heating and hot water supplying device Download PDFInfo
- Publication number
- AU2017304850B2 AU2017304850B2 AU2017304850A AU2017304850A AU2017304850B2 AU 2017304850 B2 AU2017304850 B2 AU 2017304850B2 AU 2017304850 A AU2017304850 A AU 2017304850A AU 2017304850 A AU2017304850 A AU 2017304850A AU 2017304850 B2 AU2017304850 B2 AU 2017304850B2
- Authority
- AU
- Australia
- Prior art keywords
- hot water
- water supply
- passage
- heating
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/238—Flow rate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/335—Control of pumps, e.g. on-off control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/36—Control of heat-generating means in heaters of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Water Supply & Treatment (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
[Problem] To provide a heating and hot water supplying device that can prevent high temperature hot water even when supplying hot water during heating operations without using a distributing valve or a three-way valve with a closing function. [Solution] A heating and hot water supplying device comprises a combustion means, a heat exchanger, a circulation channel, a circulation pump, a first bypass channel that branches from the circulation channel and bypasses a heating terminal, a heat exchanger for hot water supply that is provided in the first bypass channel, and a hot water supply channel for supplying tap water to the heat exchanger for hot water supply. A distributing means is provided in a branching portion of the first bypass channel and the distributing means can adjust the distribution ratio so as to enable each of a heating operation, a hot water supply operation, and a simultaneous heating and hot water supply operation. The hot water supply channel is provided with a second bypass channel that bypasses the heat exchanger for hot water supply, comprises a flow rate detection means that is upstream from a branching portion of the second bypass channel, and comprises a flow rate regulating means for the hot water supply channel that is in the branching portion or downstream from the branching portion and upstream of the heat exchanger for hot water supply. The hot water supply channel is closed by the flow rate regulating means during heating operation.
Description
[0001] The present invention relates to a heating and hot water supply
device that performs heating operation (i.e. room heating etc.) by applying
heat produced by combustion to a heating thermal mediun, and that also
performs supply of hot water by applying heat to cold water by heat
exchange with the heating thermal mediun, and in particular relates to
such a heating and hot water supply device that is capable of performing
heating operation and hot water supply operation simultaneously.
[0002] A reference herein to a patent document or any other matter
identified as prior art, is not to be taken as an admission that the
document or other matter was known or that the information it contains
was part of the common general knowledge as at the priority date of any
of the claims.
[0002a] From the past, heating and hot water supply devices that are
capable of simultaneously performing heating operation and hot water
supply operation have been widely utilized. As for example disclosed in
Patent Document #1, this type of heating and hot water supply device is
provided with a main heat exchanger and a heating apparatus, and there
are also provided a circulation passage through which a heating thermal
mediun is circulated by a circulation pump between the main heat
exchanger and the heating apparatus, and a bypass passage that branches off from the circulation passage and bypasses the heating apparatus.
[0003] A heat exchanger for hot water supply is provided in this bypass
passage, and heat can be applied by the heating thermal mediun to water
la
PCT-2016N18 SPECIFICATION
flowing along a hot water supply passage through the heat exchanger for
hot water supply. A distribution flow rate adjustment means is provided at
the portion where the circulation passage and the bypass passage branch
apart, so that it is possible to adjust the distribution ratio between the
heating thermal mediun that goes to the heating apparatus and the heating
thermal mediun that goes to the heat exchanger for hot water supply.
[0004] During heating operation, fuel is combusted, and heat is applied
to the heating thermal mediun by the main heat exchanger, and the
distribution flow rate adjustment means is adjusted so that the heating
thermal mediun circulates entirely within the circulation passage. And,
after the heating thermal mediun to which heat has been applied dissipates
heat in the heating apparatus, it returns back to the main heat exchanger.
[0005] When hot water supply operation is to be performed, the
distribution flow rate adjustment means is adjusted so that part or all of
the heating thermal mediun to which heat has been applied circulates in
the bypass passage, and hot water is supplied by heat being applied to the
water flowing in the hot water supply passage by the heat exchanger for hot
water supply that is provided in the bypass passage. Moreover, there are
also some systems in which, instead of a distribution valve being provided,
hot water supply operation is performed by operating a three way valve, so
that all of the heating thermal mediun circulates in the bypass passage.
[0006] A hot water supply bypass passage that bypasses the heat
exchanger for hot water supply is provided to the hot water supply passage,
and the hot water supply temperature is adjusted by mixing fresh water
that flows in the hot water supply bypass passage into the hot water that has been heated by the heat exchanger for hot water supply. As for example disclosed in Patent Document #1, the flow rate of the cold water flowing in the hot water supply bypass passage may be regulated by providing a bypass valve in the hot water supply bypass passage, and the hot water supply temperature may be adjusted by mixing the cold water into the water to which heat has been applied. Alternatively, a mixing valve may be provided at the portion where the hot water supply passage and the hot water supply bypass passage join together, so that the mixing ratio between the water to which heat has been applied and the cold water can be adjusted, and thereby the hot water supply temperature is adjusted by mixing together the water to which heat has been applied and the cold water.
[0007] Patent Document #1: Japanese Laid Open Patent Publication
2005-337632.
[0008] When a heating and hot water supply device of this type performs
heating operation, the heating thermal mediun circulates at high
temperature between the heating apparatus and the main heat exchanger.
However, the distribution valve or three way valve that is provided at the
branching portion between the circulation passage and the bypass passage
is not generally a distribution valve or a three way valve having a fully
PCT-2016N18 SPECIFICATION
closing function which is usually high in price, so that, during heating
operation, it is not possible perfectly to shut off outflow of the heating
thermal mediun to the bypass passage. Because of this, heat is applied to
the water within the heat exchanger for hot water supply by the heating
thermal mediun at high temperature which flows out into the bypass
passage due to heating operation.
[0009] Furthermore, even outside the heat exchanger for hot water
supply, the temperature of the water within the hot water supply passage is
elevated by hot water heat transfer. For example, with the heating and hot
water supply device of Patent Document #1, the temperature of the water
in the hot water supply passage on the upstream side and on the
downstream side than the heat exchanger for hot water supply, and also
the temperature of the water in the hot water supply bypass passage, are
both elevated by such heat transfer. When hot water supply is started in
this state, there is a risk that perhaps the hot water provided will be hotter
than the user anticipates, since the temperature of the water in the hot
water supply passage and the temperature of the water in the hot water
supply bypass passage are unduly high directly after the hot water supply
starts.
[0010] Moreover, one expedient for preventing this type of hot water
output at unduly high temperature is for the distribution valve or the three
way valve at the portion where the circulation passage and the bypass
passage branch apart to be provided as a distribution valve or a three way
valve having a fully closing function, so that the heating thermal mediun is
positively prevented from flowing out, but this is not a preferred solution because it increases the manufacturing cost.
[0011] The object of the present invention is to provide a heating and hot
water supply device that is capable of avoiding output of hot water at
excessively high temperature even when hot water is being supplied during
heating operation, without employing any distribution valve or three way
valve having a fully closing function.
[0012] The present invention presents a heating and hot water supply
device, comprising a combustion means, a main heat exchanger, a
circulation passage connected to the main heat exchanger and to a heating
apparatus, a circulation pump provided in the circulation passage, a first
bypass passage that branches off from the circulation passage and bypasses
the heating apparatus, a heat exchanger for hot water supply provided in
the first bypass passage, and a hot water supply passage for supplying cold
water to the heat exchanger for hot water supply, and for supplying hot
water heated by the heat exchanger for hot water supply to a
predetermined set hot water supply temperature, wherein the supply
device further comprises: a distribution means provided at a first branching
portion of the first bypass passage, and a distribution ratio thereof being
capable of being adjusted so that heating operation, or hot water supply
operation, or simultaneous heating operation and hot water supply
operation, become possible; a second bypass passage bypassing the heat
exchanger for hot water supply is provided in the hot water supply passage;
a flow rate detection means provided on an upstream side than a second
branching portion of the second bypass passage; and a flow rate adjustment means for the hot water supply passage which is provided at the second branching portion or on the downstream side than the second branching portion and also at an upstream side than the heat exchanger for hot water supply; wherein; during heating operation, the hot water supply passage is closed by the flow rate adjustment means; when the flow rate detection means detects a predetermined flow rate, heating operation is switched to hot water supply operation; the flow rate adjustment means maintains the hot water supply passage in closed state for a given number of seconds after switching to hot water supply operation; and after elapsing of the given number of seconds, the hot water supply passage is opened by the flow rate adjustment means.
[0013] According to the constitution described above, since the hot water
supply passage is closed by the flow rate adjustment means during heating
operation, therefore heat transfer to the water is prevented by the flow rate
adjustment means. Accordingly, even if the temperature of water within
the hot water supply passage is elevated by the heating thermal mediun
that has flowed out from the distribution means during heating operation
via the heat exchanger for hot water supply, it is still possible to suppress
elevation of the temperature of the water on the upstream side than the
flow rate adjustment means. When hot water is supplied in this state, since
the water whose temperature has been prevented from rising is supplied as
hot water through the second bypass passage, accordingly it is possible to
avoid supply of output hot water at an excessively high temperature.
[0014] The flow rate adjustment means may be a distribution valve
provided at the second branching portion.
[0015] According to the constitution described above, during the heating
operation, along with the hot water supply passage being closed by the
distribution valve, the second bypass passage is opened. Therefore, even if
during heating operation the temperature of the water in the hot water
supply passage is elevated by the heating thermal mediun, transmission of
heat is prevented by the distribution valve, and it is possible to suppress
6a
PCT-2016N18 SPECIFICATION
elevation of the temperature of the water on the upstream side than the
distribution valve. Moreover, when supply of hot water is started in this
state, since this water whose temperature has been prevented from rising is
supplied as hot water via the second bypass passage, accordingly it is
possible to avoid supply of output hot water at an excessively high
temperature.
[0016] The flow rate adjustment means may be a flow rate regulation
valve provided more downstream than the second branching portion and
moreover on the upstream side of the heat exchanger for hot water supply,
and the bypass flow rate regulation valve may be provided in the second
bypass passage; and, during heating operation, the bypass flow rate
regulation valve may be opened.
[0017] According to the constitution described above, during the heating
operation, the flow rate regulation valve closes the hot water supply
passage, and the second bypass passage is opened. Therefore, even if during
heating operation the temperature of the water in the hot water supply
passage is elevated by the heating thermal mediun, transmission of heat is
prevented by the flow rate regulation valve, and it is possible to suppress
elevation of the temperature of the water on the upstream side than the
flow regulation valve. Moreover, when supply of hot water is started in this
state, since the water whose temperature has been prevented from rising is
supplied as hot water via the second bypass passage, accordingly it is
possible to avoid supply of output hot water at an excessively high
temperature.
[0018] According to the present invention, it is possible to provide a
heating and hot water supply device that is capable of avoiding output of
hot water at excessively high temperature when supplying hot water
during heating operation, without employing a high priced distribution
valve or three way valve having a fully closing function.
[0018a] Where any or all of the terms "comprise", "comprises",
"comprised" or "comprising" are used in this specification (including
the claims) they are to be interpreted as specifying the presence of the
stated features, integers, steps or components, but not precluding the
presence of one or more other features, integers, steps or components.
[0019] Fig. 1 is a figure schematically showing a heating and hot water
supply device according to the present invention;
Fig. 2 is a graph showing the hot water supply temperature when a hot
water supply passage is closed during heating operation;
Fig. 3 is a graph showing the hot water supply temperature when a hot
water supply passage is not closed during heating operation according to
the prior art; and
Fig. 4 is a figure schematically showing a heating and hot water supply
device according to a second embodiment.
[0020] In the following, implementations of the present invention will be explained on the basis of embodiments.
First Embodiment
[0021] First, the overall constitution of the heating and hot water supply
device 1 of the present invention will be explained with reference to Fig. 1.
The heating and hot water supply device 1 performs heating
8a
PCT-2016N18 SPECIFICATION
operation by circulating a heating thermal mediun, to which heat has been
applied by heat exchange with combustion gases generated by a combustion
unit 2, to a heating apparatus ( not shown in the figures), and also performs
hot water supply operation by supplying cold water to which heat has been
applied by heat exchange with the heating thermal mediun, while adjusting
its temperature to a set hot water supply temperature.
[0022] The heating and hot water supply device 1 comprises a
combustion unit 2 which is a combustion means that mixes fuel gas and air
together and combusts them, a main heat exchanger 10 that applies heat to
the heating thermal mediun by heat exchange with the combustion gases
generated by the above combustion, a circulation passage 4 that connects
the main heat exchanger 10 with the heating apparatus, a circulation pump
11 that circulates the heating thermal mediun through the circulation
passage 4, and so on.
[0023] Moreover, the heating and hot water supply device 1 further
comprises a first bypass passage 12 that branches off from the circulation
passage 4 and bypasses the heating apparatus, a heat exchanger for hot
water supply 20 that is provided in the first bypass passage 12, a hot water
supply passage 21 for supplying fresh water to the heat exchanger for hot
water supply 20 and for supplying hot water to which heat has been applied
by the heat exchanger for hot water supply 20, and so on. And a first
distribution valve 15 (a distribution means) is provided in the first
branching portion where the first bypass passage 12 branches off from the
circulation passage 4.
[0024] Furthermore, the heating and hot water supply device 1
PCT-2016N18 SPECIFICATION
comprises a control unit 7 that receives detection signals from temperature
sensors etc. and controls heating operation and hot water supply operation
etc. by operating the various units described above, and also comprises a
box shaped casing 8 that receives the devices described above and so on.
[0025] Next, the combustion unit 2 will be explained.
The combustion unit 2 comprises an intake passage 40 that takes in
air for combustion, a fuel gas passage 41 that supplies fuel gas provided
from the exterior into the intake passage 40, a combustion fan 24 that
blows the resulting mixture of air and fuel gas through the intake passage
40, and a burner 43 that combusts the mixture gas that has been blown in
by the combustion fan 42.
[0026] The flow rate of the air for combustion is controlled by the
rotational speed of the combustion fan 42. Moreover, a venturi mixer 44 is
provided at the downstream end of the fuel gas passage 41, and controls the
flow rate of the fuel gas supplied by the rotational speed of the combustion
fan 42. An electromagnetic valve 45 is provided in the fuel gas passage 41,
and, by opening and closing the electromagnetic valve 45, the fuel gas
supply is started or stopped.
[0027] The burner 43 starts combustion by igniting the mixture gas
blown by the combustion fan 42 with an ignition device 46 that is provided
below the burner 43. Moreover, a combustion sensor 47 is provided below
the burner 43 and detects the state of combustion.
[0028] The main heat exchanger 10 is provided below the ignition device
46 and the combustion sensor 47. This main heat exchanger 10 and the
burner 43 etc. are housed within a housing 48 that defines a passage for the
PCT-2016N18 SPECIFICATION
combustion gases. The combustion gases generated by combustion of the
mixture gas in the burner 43 are sent to the main heat exchanger 10, and,
after having exchanged heat with the heating thermal mediun, are
exhausted to the exterior via an exhaust passage 49 that extends from the
lower portion of the housing 48. An exhaust temperature sensor 50 is
provided at the downstream end portion of the exhaust passage 49, and is
capable of detecting the temperature of the exhausted combustion gases.
[0029] The main heat exchanger 10 comprises a primary heat exchanger
10a that recovers sensible heat from the combustion gases, and a secondary
heat exchanger 10b that recovers latent heat from the combustion gases.
These two heat exchangers 10a,10b are connected so that the heating
thermal mediun to which heat has first been applied by the secondary heat
exchanger 10b then receives further application of heat from the primary
heat exchanger 10a. A drainage passage 51 is provided at the bottom
portion of the housing 48, and discharges drainage water that has been
condensed in the secondary heat exchanger 10b to the exterior. In order to
prevent the combustion gases from flowing out, a drainage trap 52 is
provided at the downstream end portion of the drainage passage 51.
[0030] Next, the circulation passage 4 will be explained.
A first temperature sensor 13 which is capable of detecting the
temperature of the heating thermal mediun flowing into the main heat
exchanger 10 is provided in the circulation passage 4 between the
circulation pump 11 and the main heat exchanger 10. And a second
temperature sensor 14 that is capable of detecting the temperature of the
heating thermal mediun to which heat has been applied by the main heat
PCT-2016N18 SPECIFICATION
exchanger 10 is provided on the downstream side of the main heat
exchanger 10.
[0031] A first distribution valve 15 is provided at the first portion where
the first bypass passage 12 branches off from the circulation passage 4, at
the downstream side of the main heat exchanger 10. The first distribution
valve 15 is capable of performing distribution while adjusting the
distribution ratio of the heating thermal mediun to which heat has been
applied by the main heat exchanger 10 between the circulation passage 4
and the first bypass passage 12. The first bypass passage 12 rejoins the
circulation passage 4 at the upstream side of the circulation pump 11.
[0032] A pressure relief valve 16 that relieves the pressure in the
circulation passage 4 is provided between the main heat exchanger 10 and
the first distribution valve 15. And a heating return temperature sensor 17
that is capable of detecting the temperature of the heating thermal mediun
returning from the heating apparatus is provided at the upstream side of
the circulation pump 11. Moreover, a replenishment passage 18 for
replenishing the heating thermal mediun is connected between the
circulation pump 11 and the heating return temperature sensor 17.
[0033] Next, the heat exchanger for hot water supply 20 will be
explained. The heat exchanger for hot water supply 20 provided in the
first bypass passage 12 is a plate type heat exchanger. In such a plate type
heat exchanger, a plurality of heat exchange plates are laminated together
so that passages are defined between the heat exchange plates. Within the
heat exchanger for hot water supply 20, the heating thermal mediun and
the supply water for hot water flow through alternate passages defined
PCT-2016N18 SPECIFICATION
between the heat exchange plates, arranged so that these flows oppose one
another and do not mix with one another. The surface area of each of the
heat exchange plates is formed with irregular roughnesses, in order to
enhance the heat exchange efficiency.
[0034] Next, the hot water supply passage 21 will be explained.
The hot water supply passage 21 is capable of supplying fresh water to the
heat exchanger for hot water supply 20, and also is capable of supplying hot
water to which heat has been applied by the heat exchanger for hot water
supply 20 to a hot water supply faucet etc., and moreover a second bypass
passage 22 is provided that branches off from the hot water supply passage
21 and bypasses the heat exchanger for hot water supply 20. A second
distribution valve 23, which is equivalent to a flow rate adjustment means,
is provided at the second branching portion between the hot water supply
passage 21 and the second bypass passage 22. The second distribution valve
23 is capable of fresh water distribution by adjusting the distribution ratio
between the hot water supply passage 21 and the second bypass passage
22. Due to this, the second distribution valve 23 is capable of adjusting the
flow rate of fresh water flowing into the hot water supply passage 21.
[0035] A flow rate regulation valve 24, a hot water supply amount sensor
25, and an intake water temperature sensor 26 are provided at the
upstream side than the second distribution valve 23. The flow rate
regulation valve 24 is capable of regulating the flow rate of the fresh water
that passes into the second distribution valve 23. The hot water supply
amount sensor 25 is capable of detecting the flow rate of the fresh water
that has been thus regulated. And the intake water temperature sensor 26
PCT-2016N18 SPECIFICATION
is capable of detecting the temperature of the fresh intake water that
passes into the second distribution valve 23.
[0036] An output hot water temperature sensor 27 is provided between
the location where the hot water supply passage 21 and the second bypass
passage 22 join together and the heat exchanger for hot water supply 20.
The output hot water temperature sensor 27 is capable of detecting the
temperature of the hot water outputted from the heat exchanger for hot
water supply 20. And a hot water supply temperature sensor 28 is provided
downstream of the location where the hot water supply passage 21 and the
second bypass passage 22 join together. The hot water supply temperature
sensor 28 is capable of detecting the temperature of the mixture water that
results from the mixing together of the hot water to which heat has been
applied by the heat exchanger for hot water supply 20 and the fresh water
flowing through the second bypass passage 22.
[0037] Next, the control unit 7 will be explained.
Although not shown in figures, the control unit 7 is capable of
receiving detection signals from the various temperature sensors etc.
provided within the heating and hot water supply device 1, and moreover is
connected to the circulation pump 11 and the first distribution valve 15
etc. so as to be capable of controlling them. Moreover, the control unit 7 is
connected to an operation device (operation terminal) that is provided
within the building to which the heating and hot water supply device 1 is
provided, so as to be capable of communicating therewith. The operation
device may, for example, comprise a display unit that is capable of
displaying, for example, temperature and operating status and so on, and
PCT-2016N18 SPECIFICATION
an operating unit for performing setting of the heating temperature and the
hot water supply temperature, and for performing starting actuation and
stopping actuation for heating operation and so on.
[0038] Next, the operation and the advantageous effects of the heating
and hot water supply device 1 will be explained with reference to Figs. 1
through 3. When heating operation is started, the control unit 7 adjusts the
first distribution valve 15 so that the heating thermal mediun circulates
only in the circulation passage 4, and, along with operating the circulation
pump 11 and causing the heating thermal mediun to circulate in the
circulation passage 4, also operates the combustion fan 42 and the ignition
device 46 and combusts mixture gas with the burner 43. The combustion
gases that are generated apply heat to the heating thermal mediun in the
main heat exchanger 10. And, during the heating operation, the control
unit 7 adjusts the second distribution valve 23 so that, along with the hot
water supply passage 21 being closed, the second bypass passage 22 is
opened. Due to the heating operation being continued, the heating thermal
mediun comes to be circulated at a predetermined temperature.
[0039] Fig. 2 is a graph showing one example of the temperature
detected by the output hot water temperature sensor 27 and the
temperature detected by the hot water supply temperature sensor 28 before
and after hot water supply operation starts during heating operation, as
the opening amount of the second distribution valve 23 changes over the
passage of time. The opening amount of the second distribution valve 23 is
expressed by a number of steps along the second vertical axis; for example,
the completely closed state when the hot water supply passage 21 is closed
PCT-2016N18 SPECIFICATION
is step 1700, while the state in which the distribution ratio between the hot
water supply passage 21 and the second bypass passage 22 is 2:3 is step
1000. At this time, the temperature of the fresh water is 22C.
[0040] During heating operation, a part of the heating thermal mediun
that is circulating flows out from the first distribution valve 15 and flows
into the first bypass passage 12. Heat is applied to the water in the hot
water supply passage 21 by the heating thermal mediun in the heat
exchanger for hot water supply 20, and the temperature of the water within
the hot water supply passage 21 that is detected by the output hot water
temperature sensor 27 that is close to the heat exchanger for hot water
supply 20 is raised to around 640 C, and the temperature of the water
detected by the hot water supply temperature sensor 28 becomes around
33 0C. Although not shown in the figure, since the hot water supply passage
21 is closed by the second distribution valve 23 so that transfer of heat from
the water that has been heated by the heat exchanger for hot water supply
20 to the water on the upstream side of the second distribution valve 23 is
prevented, accordingly the temperature more upstream than the second
distribution valve 23 is low.
[0041] Supply of hot water is started near the elapsed time of 3 seconds
in Fig. 2; that is, hot water supply operation is started when, due to a hot
water supply faucet etc. being opened, the hot water supply amount sensor
25 detects a flow rate greater than or equal to the predetermined flow rate.
The control unit 7 adjusts the first distribution valve 15 so that the heating
thermal mediun circulates only in the first bypass passage 12, and thereby
heat is applied by the heating thermal mediun to the water in the heat
PCT-2016N18 SPECIFICATION
exchanger for hot water supply 20. Since, even after the hot water supply
operation has started, the hot water supply passage 21 remains closed for
one second, for example, rising of temperature at the upstream side than
the second distribution valve 23 is suppressed and hot water is supplied via
the second bypass passage 22. Accordingly, although the water at the
upstream side of the hot water supply temperature sensor 28 whose
temperature has been raised is supplied as hot water whose temperature
has been elevated by about +4 0 C, since the amount of this elevation is small
and water is immediately supplied as hot water via the second bypass
passage 22, accordingly it is possible to avoid supply of hot water at an
excessively high temperature.
[0042] Next, after for example one second has elapsed from the start of
hot water supply, the control unit 7 gradually adjusts the opening amount
of the second distribution valve 23, for example from 1700 steps to 1000
steps in three seconds, so that fresh water gradually flows into the hot
water supply passage 21. Since the water at high temperature in the heat
exchanger for hot water supply 20 is gradually outputted as hot water,
accordingly the output hot water temperature is elevated. However, the
amount of elevation of the hot water supply temperature is low, because
this output hot water at high temperature and the cold water at low
temperature are mixed together.
[0043] Since, in this manner, the water in the hot water supply passage
21 whose temperature has been elevated during the heating operation is
supplied as hot water while being mixed a little at a time with fresh water
passing through the second bypass passage 22, accordingly it is possible to
PCT-2016N18 SPECIFICATION
avoid the output of hot water at an excessively high temperature due to the
water in the hot water supply passage 21 whose temperature has been
elevated during the heating operation. Moreover when, on the basis of the
set hot water supply temperature and the output hot water temperature
detected by the output hot water temperature sensor 27 etc., the control
unit 7 determines that simultaneous heating operation and hot water
supply operation are possible, then the control unit 7 adjusts the
distribution ratio of the first distribution valve 15 and performs
simultaneous heating operation and hot water supply operation.
[0044] Fig. 3 is a graph showing one example of change over the passage
of time of the output hot water temperature and the hot water supply
temperature, when, in order to recreate the operation of a prior art heating
and hot water supply device, the second distribution valve 23 is fixed at
1000 steps, and the hot water supply passage 21 is not closed during space
heating operation. The temperature of the fresh water at this time is 24C.
[0045] Since the hot water supply passage 21 is not closed during the
space heating operation, accordingly the temperature of the water in the
heat exchanger for hot water supply 20 is elevated by the heating thermal
mediun and convection takes place, and water at high temperature flows in
the hot water supply passage 21 and in the second bypass passage 22. Due
to this, heat is transmitted to the upstream side and the downstream side
of the heat exchanger for hot water supply 20, and the water in the hot
water supply passage 21andin the second bypass passage is heated up to a
high temperature. The temperature of the water more downstream than
the portion where the hot water supply passage 21 and the second bypass
PCT-2016N18 SPECIFICATION
passage 22 come together is also elevated due to the water at high
temperature, and the temperature detected by the hot water supply
temperature sensor 28 goes up to around 490 C, which is a higher
temperature than in the case of Fig. 2. Although not shown in the figure, in
a similar manner, heat is also transmitted to the water at the upstream
side of the second distribution valve 23, which accordingly also goes to high
temperature.
[0046] When in Fig. 3 the hot water supply is started at around 3 seconds
elapsed time, since the second distribution valve 23 is not closing the hot
water supply passage 21, accordingly the fresh water that is taken in by the
second distribution valve 23 as intake water is distributed to the hot water
supply passage 21 and to the second bypass passage 22. Therefore, the
water at high temperature in the heat exchanger for hot water supply 20 is
outputted, and the output hot water temperature rises. And, when at
around 6 seconds elapsed time this water at high temperature passes down
the second bypass passage 22 and mixes with the water whose temperature
has been raised and is supplied as hot water, the hot water supply
temperature is elevated. Since the temperature of the water that is mixed
in through the second bypass passage 22 is high, accordingly the magnitude
of this elevation is around +14 0 C, which is large as compared with the case
of Fig. 2. Accordingly, in the case of Fig. 3, the hot water continues to be
supplied at a high temperature for a considerable while after the start of
hot water supply, and there is a danger of output of hot water at an
excessively high temperature, since the hot water supply temperature rises
greatly partway through this supply.
PCT-2016N18 SPECIFICATION
[0047] As explained above, with the heating and hot water supply device
1 of the present invention, due to the fact that the hot water supply passage
21 is closed by the second distribution valve 23 during the space heating
operation, it is possible to suppress elevation of the temperature of the
water in the hot water supply passage 21, so that it is possible to avoid
outputting of excessively hot water. Moreover, since the water within the
hot water supply passage 21 whose temperature has become elevated
during heating operation is gradually mixed with fresh water supplied via
the second bypass passage 22 and is then supplied as hot water, accordingly
it is possible to avoid any outputting of excessively hot water.
Second Embodiment
[0048] Next, a heating and hot water supply device 1A according to a
second embodiment will be explained with reference to Fig. 4.
In the heating and hot water supply device 1A, instead of the second
distribution valve 23 of the first embodiment which is an adjustment means
for adjusting the flow rate in the hot water supply passage 21, it is possible
to adjust the hot water supply flow rate with a flow rate regulation valve
23A provided in a hot water supply passage 21A and with a bypass flow
rate regulation valve 24A provided in a second bypass passage 22A. The
second bypass passage 22A branches off from between a flow rate
adjustment valve 23A and a hot water supply amount sensor 25A.
[0049] Next, the operation and the advantageous effects of the heating
and hot water supply device 1A will be explained.
During heating operation, the control unit 7A closes the flow rate
adjustment valve 23A and opens the bypass flow rate regulation valve 24A
PCT-2016N18 SPECIFICATION
so that the hot water supply passage 21A is closed and the second bypass
passage 22A is opened. Even if the temperature of the water in the hot
water supply passage 21A becomes elevated during the heating operation
by the heating thermal mediun, rise of the temperature of the fresh water
at the upstream side than the flow rate adjustment valve 23A is
suppressed, since the flow rate adjustment valve 23A is closed.
[0050] When in this state hot water supply operation is started, since
fresh water rising of whose temperature has been suppressed is supplied
via the second bypass passage 22A, accordingly it is possible to avoid output
of hot water at an excessively high temperature when hot water supply
starts. Moreover, the control unit 7A adjusts the flow rate adjustment valve
23A so that a lot of fresh water flows into the hot water supply passage 21
gradually. Since in this manner, during space heating operation, the water
in the hot water supply passage 21A whose temperature has been elevated
is mixed with fresh water a little bit at a time for supply of hot water,
accordingly it is possible to avoid the output of hot water at an excessively
high temperature due to the hot water in the hot water supply passage 21A.
Moreover when, on the basis of the set hot water supply temperature and
the output hot water temperature detected by the output hot water
temperature sensor 27A and so on, the control unit 7A is able to determine
that simultaneous heating operation and hot water supply operation are
possible, then the control unit adjusts the distribution ratio of the first
distribution valve 15A and performs simultaneous space heating operation
and hot water supply operation.
[0051] Apart from the above, for a person skilled in the art, it would be
PCT-2016N18 SPECIFICATION
possible to implement the present invention by adding various changes to
the embodiments described above without deviating from the gist of the
invention, and the present invention is to be understood as including such
variant embodiments.
PCT-2016N18 SPECIFICATION
[0052]
1: heating and hot water supply device
2: combustion unit (combustion means)
4: circulation passage
7: control unit
8: case
8a: bottom plate
10: main heat exchanger
11: circulation pump
12:firstbypass passage
15: first distribution valve (distribution means)
20,20A: heat exchanger for hot water supply
21,21A: hot water supply passage
22,22A: second bypass passage
23: second distribution valve (flow rate adjustment means)
23A: flow rate adjustment valve
24,24A: flow rate regulation valve
25,25A: hot water supply amount sensor
27: output hot water temperature sensor
28: hot water supply temperature sensor
Claims (3)
1. A heating and hot water supply device, comprising a combustion
means, a main heat exchanger, a circulation passage connected to the main
heat exchanger and to a heating apparatus, a circulation pump provided in
the circulation passage, a first bypass passage that branches off from the
circulation passage and bypasses the heating apparatus, a heat exchanger
for hot water supply provided in the first bypass passage, and a hot water
supply passage for supplying cold water to the heat exchanger for hot water
supply, and for supplying hot water heated by the heat exchanger for hot
water supply to a predetermined set hot water supply temperature,
wherein the supply device further comprises:
a distribution means provided at a first branching portion of the
first bypass passage, and a distribution ratio thereof being capable of being
adjusted so that heating operation, or hot water supply operation, or
simultaneous heating operation and hot water supply operation, become
possible;
a second bypass passage bypassing the heat exchanger for hot water
supply is provided in the hot water supply passage;
a flow rate detection means provided on an upstream side than a
second branching portion of the second bypass passage; and
a flow rate adjustment means for the hot water supply passage
which is provided at the second branching portion or on the downstream
side than the second branching portion and also at an upstream side than
the heat exchanger for hot water supply;
wherein; during heating operation, the hot water supply passage is closed by the flow rate adjustment means; when the flow rate detection means detects a predetermined flow rate, heating operation is switched to hot water supply operation; the flow rate adjustment means maintains the hot water supply passage in closed state for a given number of seconds after switching to hot water supply operation; and after elapsing of the given number of seconds, the hot water supply passage is opened by the flow rate adjustment means.
2. The heating and hot water supply device according to claim 1,
wherein the flow rate adjustment means is a distribution valve provided at
the second branching portion.
3. The heating and hot water supply device according to claim 1,
wherein the flow rate adjustment means is a flow rate regulation valve
provided more downstream than the second branching portion and
moreover on the upstream side than the heat exchanger for hot water
supply, and the bypass flow rate regulation valve is provided in the second
bypass passage; and, during heating operation, the bypass flow rate
regulation valve is opened.
Fig.1 1 EXHAUST
40 50 42 AIR SUPPLY 2 44 47 14 48 46 41 43 45 10a 4 10 10b 13 20 21 1/3
49 8 11 15 51 27 23
18 26 24 7 17 12 28 52 22 25
HOT COLD FUEL 120VAC Ex. WATER WATER GAS HEATING MEDIUM H.A.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-146595 | 2016-07-26 | ||
| JP2016146595 | 2016-07-26 | ||
| PCT/JP2017/019341 WO2018020805A1 (en) | 2016-07-26 | 2017-05-24 | Heating and hot water supplying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2017304850A1 AU2017304850A1 (en) | 2019-02-07 |
| AU2017304850B2 true AU2017304850B2 (en) | 2020-06-11 |
Family
ID=61016561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017304850A Active AU2017304850B2 (en) | 2016-07-26 | 2017-05-24 | Heating and hot water supplying device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20190234653A1 (en) |
| CN (1) | CN109564007B (en) |
| AU (1) | AU2017304850B2 (en) |
| WO (1) | WO2018020805A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6745039B2 (en) * | 2016-11-25 | 2020-08-26 | 株式会社ノーリツ | Heating water heater |
| JP7198124B2 (en) * | 2019-03-14 | 2022-12-28 | リンナイ株式会社 | Heating water heater |
| JP7283029B2 (en) * | 2019-10-25 | 2023-05-30 | 株式会社ノーリツ | Heating water heater |
| JP2021183889A (en) * | 2020-05-22 | 2021-12-02 | 株式会社ノーリツ | Hot water supply system |
| IT202100010979A1 (en) * | 2021-04-30 | 2022-10-30 | Immergas Spa | COMBINED SYSTEM AND PROCESS FOR HEATING A PRIMARY WATER CIRCUIT |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005337632A (en) * | 2004-05-28 | 2005-12-08 | Noritz Corp | Heat source device |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59186945U (en) * | 1983-05-30 | 1984-12-12 | 鹿児島日本電気株式会社 | fluorescent display tube |
| JP2586748B2 (en) * | 1991-02-01 | 1997-03-05 | 株式会社ノーリツ | Water heater |
| US5881952A (en) * | 1998-07-14 | 1999-03-16 | Macintyre; Kenneth R. | Heater for liquids |
| JP3742356B2 (en) * | 2002-03-20 | 2006-02-01 | 株式会社日立製作所 | Heat pump water heater |
| US7284709B2 (en) * | 2003-11-07 | 2007-10-23 | Climate Energy, Llc | System and method for hydronic space heating with electrical power generation |
| US7040544B2 (en) * | 2003-11-07 | 2006-05-09 | Climate Energy, Llc | System and method for warm air space heating with electrical power generation |
| GB0522307D0 (en) * | 2005-11-01 | 2005-12-07 | Zenex Technologies Ltd | A burner and heat exchanger combination, and a boiler including such a burner and heat exchanger combination |
| KR100641277B1 (en) * | 2005-11-22 | 2006-11-02 | 주식회사 경동에버런 | Dual pipe heat exchanger of boiler for house heating and hot water |
| KR200407573Y1 (en) * | 2005-11-22 | 2006-01-31 | 주식회사 경동보일러 | Hot water supply unit of boiler with double tube heat exchanger |
| JP4101843B2 (en) * | 2006-01-23 | 2008-06-18 | 高木産業株式会社 | Heat source device and control method thereof |
| JP2008039264A (en) * | 2006-08-04 | 2008-02-21 | Rinnai Corp | Freezing forecasting device of water flowing circuit and water heater |
| KR20090102940A (en) * | 2008-03-27 | 2009-10-01 | 주식회사 경동나비엔 | Boiler suppliable heating-water and hot-water simultaneously |
| US8498523B2 (en) * | 2009-02-03 | 2013-07-30 | Intellihot, Inc. | Apparatus and control method for a hybrid tankless water heater |
| KR101164717B1 (en) * | 2009-09-28 | 2012-07-12 | 주식회사 경동나비엔 | Hot-water supply heat exchanger having mixing valve and adapter integrated with mixing valve |
| CN201607021U (en) * | 2009-12-25 | 2010-10-13 | 广东万家乐燃气具有限公司 | Gas heating water heater system with domestic water circulation device |
| JP2013044507A (en) * | 2011-08-26 | 2013-03-04 | Panasonic Corp | Heat pump hot water apparatus |
| CN106907860B (en) * | 2012-09-28 | 2019-09-03 | (株)庆东Navien公司 | Structure to control the temperature of the hot water supply from the waste heat recovery system |
| KR101427694B1 (en) * | 2012-12-12 | 2014-08-07 | 주식회사 경동나비엔 | Hot-water centered boiler for heating and hot-water supply |
| NL2011960C2 (en) * | 2013-12-13 | 2015-06-16 | Intergas Heating Assets B V | HEAT EXCHANGER, HEATING DEVICE, HEATING SYSTEM AND METHOD FOR USE THEREOF. |
| US9719687B2 (en) * | 2014-01-21 | 2017-08-01 | Intellihot, Inc. | Multi-temperature output fluid heating system |
| EP3163176B1 (en) * | 2014-06-30 | 2019-09-11 | Mitsubishi Electric Corporation | Heating and hot water supply system |
| US9726400B2 (en) * | 2014-07-30 | 2017-08-08 | Rinnai Corporation | Hot water supply device |
| US10132507B2 (en) * | 2014-08-20 | 2018-11-20 | Intellihot, Inc. | Combined hot water and air heating and conditioning system including heat pump |
| US10012396B2 (en) * | 2014-11-18 | 2018-07-03 | Intellihot, Inc. | Combined space conditioning or heating and water heating system |
| CN205066133U (en) * | 2015-09-24 | 2016-03-02 | 广州迪森家用锅炉制造有限公司 | Wall -mounted gas heating stove |
-
2017
- 2017-05-24 AU AU2017304850A patent/AU2017304850B2/en active Active
- 2017-05-24 US US16/318,371 patent/US20190234653A1/en not_active Abandoned
- 2017-05-24 WO PCT/JP2017/019341 patent/WO2018020805A1/en not_active Ceased
- 2017-05-24 CN CN201780046008.3A patent/CN109564007B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005337632A (en) * | 2004-05-28 | 2005-12-08 | Noritz Corp | Heat source device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018020805A1 (en) | 2018-02-01 |
| CN109564007A (en) | 2019-04-02 |
| CN109564007B (en) | 2021-06-22 |
| AU2017304850A1 (en) | 2019-02-07 |
| US20190234653A1 (en) | 2019-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017304850B2 (en) | Heating and hot water supplying device | |
| JP5580658B2 (en) | Heat medium supply device | |
| US10890359B2 (en) | Heating and hot water supply device | |
| US10989442B2 (en) | Heating and hot water supply device | |
| JP2016044888A (en) | Hot water supply system and cogeneration system | |
| US11946655B2 (en) | Heating and hot-water supply apparatus | |
| KR101496542B1 (en) | Instantaneous hot water boiler having hot water mixing structure | |
| JP6601059B2 (en) | Combined heat source machine | |
| US11788735B2 (en) | Heating and hot-water supply device | |
| KR20190092020A (en) | Method for controlling the temperature of boiler circulating water and the boiler thereof | |
| JP2013108642A (en) | Heating medium supply device | |
| JP2014095489A (en) | Cogeneration system, and hot-water supply facility | |
| JP2012197993A (en) | Heat medium supply facility, and operation control method for the same | |
| JP6249279B2 (en) | Hot water storage system | |
| JP4889438B2 (en) | Heat supply system | |
| JP6755296B2 (en) | Hot water supply system and cogeneration system | |
| JP2008082633A (en) | Water heater and plate heat exchanger | |
| US11549692B2 (en) | Heating and hot water supply system | |
| JP2024034062A (en) | hot water storage hot water system | |
| JPH1137488A (en) | Tap water heater | |
| JP2003028504A (en) | Hot water storage system | |
| JP2004263953A (en) | Instant water heater | |
| JP2004309054A (en) | Instant water heater | |
| JPH07260257A (en) | Hot water supply apparatus | |
| JP2004309055A (en) | Instant water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |