JP3854169B2 - Heat pump type water heater - Google Patents

Heat pump type water heater Download PDF

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Publication number
JP3854169B2
JP3854169B2 JP2002039478A JP2002039478A JP3854169B2 JP 3854169 B2 JP3854169 B2 JP 3854169B2 JP 2002039478 A JP2002039478 A JP 2002039478A JP 2002039478 A JP2002039478 A JP 2002039478A JP 3854169 B2 JP3854169 B2 JP 3854169B2
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Japan
Prior art keywords
hot water
temperature
storage tank
water
outlet
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JP2003240342A (en
Inventor
彰 伊藤
賢雄 冨田
圭 前田
幸治 小島
徳純 広野
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株式会社コロナ
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump type hot water supply apparatus that circulates hot water in a hot water storage tank and is boiled by a heat pump circuit, and circulates high temperature water in the hot water storage tank and is used as a heat source for heating or reheating / holding a bath. .
[0002]
[Prior art]
Conventionally, this type has been shown in FIG.
Here, 101 is a heat pump circuit, 102 is a hot water storage tank, and low temperature water of about 5 to 25 ° C. taken out from the lower part of the hot water storage tank 102 is heated to about 70 to 90 ° C. by the heat pump circuit 101, and from the upper part of the hot water storage tank 102. Laminated hot water storage.
[0003]
A water supply pipe 103 is connected to the lower end of the hot water storage tank 102, and a hot water discharge pipe 104 is connected to the upper end. An electric mixing valve 105 mixes high-temperature water from the hot water discharge pipe 104 and low-temperature water from the water supply pipe 103 with an arbitrary hot water supply set temperature set by a remote controller (not shown) or the like and discharges the hot water from the hot water tap 106. It is.
[0004]
Reference numeral 107 denotes a heat exchanger as a heat source for heating or bath reheating / keeping heat, which can be circulated with the hot water storage tank 102 by a heat transfer pipe 108 branched from the hot water discharge pipe 104 and a heat exchange return pipe 109 joined to the water supply pipe 103. The hot water in the hot water storage tank 102 is connected to the heat exchanger 107 to heat the hot water in a secondary circuit (not shown) such as a heating circuit or a bath reheating / warming circuit. .
[0005]
The high-temperature water taken out from the upper part of the hot water storage tank 102 is subjected to heat exchange by the heat exchanger 107 and the temperature is lowered to become medium-temperature water of about 30 to 50 ° C. from the lower part of the hot water storage tank 102 in the hot water storage tank 102. Return to.
[0006]
[Problems to be solved by the invention]
However, in this conventional one, medium temperature water of about 30 to 50 ° C. is stored in the hot water storage tank 102 by heat exchange in the heat exchanger 107. This medium temperature water is used as a heat source for heating or reheating. Since the temperature is low, it is not suitable, and if hot water is not supplied until the hot water runs out, medium-temperature water with a small amount of retained heat per capacity remains in the hot water storage tank 102 indefinitely. When the water in the hot water storage tank 102 cannot be effectively used and the water in the hot water storage tank 102 is boiled, the efficiency is low due to the high temperature to reheat the medium temperature water by the heat pump circuit 101, and the COP (energy consumption efficiency) of the heat pump hot water supply device ) Is reduced.
[0007]
[Means for Solving the Problems]
  Therefore, in order to solve these problems, the present invention has a water supply port for allowing low temperature water to flow in from the water supply pipe at the lower end portion, and the high temperature water stored in the hot water is discharged from the first outlet pipe. A hot water storage tank having a hot water outlet at its upper end, a heat pump circuit having a compressor, an evaporator and a condenser, and low-temperature water taken out from a heat pump outlet provided at the lower part of the hot water storage tank And a hot water circulation circuit for returning the heated high temperature water from the heat pump return port provided in the upper part of the hot water storage tank into the hot water storage tank, and the high temperature water taken out from the high temperature water outlet provided in the upper part of the hot water storage tank. A heat-use circulation circuit that heats the medium-temperature water whose temperature has been reduced to return to the medium-temperature water return port provided in the lower part of the hot water storage tank;A remote control that has a hot water temperature setting switch and can set the hot water temperature to an arbitrary hot water temperature., High temperature water flowing out from the first outlet and low temperature water from the water supply pipeSet by the remote controlA first mixing valve for mixing at an arbitrary hot water supply set temperature;Hot water temperature sensor provided downstreamA second hot water outlet and a second hot water pipe for letting the hot water flow out to a position higher than the intermediate hot water return port and lower than the first hot water outlet in the hot water storage tank. And a second mixing valve for mixing intermediate temperature water from the second tapping pipe in the middle of the first tapping pipe between the first mixing valve and the first tapping outletAnd the mixing temperature sensor downstream of itHigh temperature water from the first outlet and intermediate temperature water from the second outlet by the second mixing valveAccording to the output of the mixed temperature sensorAny hot water set temperatureHigher than the predetermined temperatureThe arbitrary hot water supply set temperature mixed in the temperature and further mixed in the first mixing valve by the second mixing valveHigher than the predetermined temperatureHot water and low-temperature water from the water supply pipeAccording to the output of the hot water temperature sensorThe hot water is mixed to the arbitrary hot water supply set temperature to supply hot water.
[0008]
  As a result, the medium-temperature water that is taken out from the high-temperature water outlet at the top of the hot water tank and used for heating and returned to the medium-temperature water return port at the bottom of the hot water tank is returned to a position higher than this medium-temperature water return port. From hot water supply set temperature by the high temperature water taken out from the provided second hot water outlet and taken out from the hot water storage tank and the second mixing valvePredetermined temperatureMixing to a higher temperature and then mixing with this second mixing valvePredetermined temperatureHot water having a high temperature and low-temperature water from the water supply pipe can be mixed with an arbitrary hot water supply set temperature by the first mixing valve to supply hot water. At this time, low-temperature water from the water supply pipe flows into the lower part of the hot water tank as much as the hot and warm water is discharged, and when the hot water in the hot water tank is boiled, it is stored in the lower part of the hot water tank. Since the low-temperature water is boiled in the heat pump circuit, it is possible to boil efficiently. The high temperature water taken out from the hot water storage tank may be used directly for heating or indirectly by heat exchange.
[0009]
  Moreover, in Claim 2, the hot water storage tank which has the 1st hot water outlet which has the water supply port which flows in low-temperature water from a water supply pipe in a lower end part, and discharges the hot water currently stored in a hot water from a 1st hot water discharge pipe in an upper end part, A heat pump circuit having a compressor, an evaporator, and a condenser; and low temperature water taken out from a heat pump outlet provided at a lower portion of the hot water storage tank is heated by the condenser of the heat pump circuit, and the heated high temperature water is heated to the hot water storage A heat pump circulating circuit for returning the hot water from the heat pump return port provided in the upper part of the tank into the hot water storage tank, and hot water taken out from the hot water outlet provided in the upper part of the hot water storage tank for heating the hot water in the secondary circuit. A heat-use circulation circuit that circulates in a heat exchanger and returns medium-temperature water whose temperature has been reduced by exchanging heat with the warm water in the secondary-side circuit to a medium-temperature water return port provided in the lower part of the hot water storage tank;A remote control that has a hot water temperature setting switch and can set the hot water temperature to an arbitrary hot water temperature., High temperature water flowing out from the first outlet and low temperature water from the water supply pipeSet by the remote controlA first mixing valve for mixing at an arbitrary hot water supply set temperature;Hot water temperature sensor provided downstreamA second hot water outlet and a second hot water pipe for letting the hot water flow out to a position higher than the intermediate hot water return port and lower than the first hot water outlet in the hot water storage tank. And a second mixing valve for mixing intermediate temperature water from the second tapping pipe in the middle of the first tapping pipe between the first mixing valve and the first tapping outletAnd the mixing temperature sensor downstream of itHigh temperature water from the first outlet and intermediate temperature water from the second outlet by the second mixing valveAccording to the output of the mixed temperature sensorAny hot water set temperatureHigher than the predetermined temperatureThe arbitrary hot water supply set temperature mixed in the temperature and further mixed in the first mixing valve by the second mixing valveHigher than the predetermined temperatureHot water and low-temperature water from the water supply pipeAccording to the output of the hot water temperature sensorThe hot water is mixed to the arbitrary hot water supply set temperature to supply hot water.
[0010]
  As a result, medium hot water with a small amount of heat per capacity that is taken out from the hot water outlet at the top of the hot water tank and used as a heating source for the secondary circuit and returned to the hot water return port at the bottom of the hot water tank is returned to this medium hot water. Take out from the second hot water outlet provided at a position higher than the mouth, hot water taken out from the upper part of the hot water storage tank and the second mixing valve from any hot water set temperaturePredetermined temperatureMixing to a higher temperature and then mixing with this second mixing valvePredetermined temperatureHot water having a high temperature and low-temperature water from the water supply pipe can be mixed with an arbitrary hot water supply set temperature by the first mixing valve to supply hot water. At this time, low-temperature water from the water supply pipe flows into the lower part of the hot water tank as much as the hot and warm water is discharged, and when the hot water in the hot water tank is boiled, it is stored in the lower part of the hot water tank. Since the low-temperature water is boiled in the heat pump circuit, it is possible to boil efficiently.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, the 1st Embodiment of this invention is described based on FIGS.
Reference numeral 1 denotes a heat pump unit, 2 denotes a hot water storage tank unit, 3 denotes a hot water mixing tap, 4 denotes a heating load terminal such as a floor heating panel.
[0016]
The heat pump unit 1 includes a compressor 5, a refrigerant-water heat exchanger 6 as a condenser 6, a decompressor 7, and an evaporator 8, and water to be heated into the refrigerant-water heat exchanger 6. A heat pump circulation pump 10 that circulates and a heat pump control unit 11 that controls driving thereof are provided, and carbon dioxide is used as a refrigerant in the heat pump circuit 9 to constitute a supercritical heat pump cycle. . Since carbon dioxide is used as the refrigerant, low-temperature water can be boiled up to a high temperature of about 90 ° C. without an electric heater.
[0017]
Here, the refrigerant-water heat exchanger 6 employs a counter flow system in which the refrigerant and the water to be heated flow opposite to each other, and in the supercritical heat pump cycle, the refrigerant is condensed in a supercritical state during heat exchange. Therefore, the water to be heated can be efficiently heated to a high temperature, and the decompressor 7 or the compressor is compressed so that the temperature difference between the refrigerant-water heat exchanger 6 inlet temperature and the refrigerant outlet temperature is constant. By controlling the machine 5, the COP (energy consumption efficiency) is very good at 3.0 or more when the inlet temperature of the refrigerant-water heat exchanger 6 to be heated is a low temperature of about 5 to 20 ° C. It is possible to heat the water to be heated.
[0018]
The hot water storage tank unit 2 includes a hot water storage tank 16 having a first hot water outlet 13 connected to the first hot water pipe 12 at the upper end and a water supply opening 15 connected to the water supply pipe 14 at the lower end. A heat pump outlet 17 is provided at the lower portion of the hot water storage tank 16 and a heat pump return port 18 is provided at the upper portion. The heat pump circulation circuit 19 communicates with the refrigerant-water heat exchanger 6 of the heat pump unit 1 to store the water in the hot water storage tank 16. Hot water is connected so that it can circulate. The hot water storage tank 16 has a capacity of about 370L.
[0019]
Reference numeral 20 denotes a heat exchanger as a heating source for the warm floor panel 4. On the primary side, a high temperature water outlet 21 communicating with the upper part of the hot water tank 16 and an intermediate hot water return port 22 below the hot water tank 16 are used for heat circulation. Hot water in the hot water storage tank 16 is circulated by a heat utilization circuit 24 having a pump 23, and a secondary side circuit 25 and a secondary circuit 25 connected to the floor warming panel 4 are circulated on the secondary side. A secondary circulation pump 26 is provided.
[0020]
Next, reference numeral 27 denotes a first mixing valve composed of an electric mixing valve that mixes hot water from the first hot water discharge pipe 12 and low temperature water from the water supply pipe 14, and a hot water supply temperature sensor provided in the hot water supply pipe 28 downstream thereof. The mixing ratio is controlled so that the hot water temperature detected at 29 becomes the hot water supply set temperature set by the user with the remote controller 30. The remote controller 30 has a hot water supply temperature setting switch 31, which can arbitrarily set the hot water supply temperature in a range of 35 to 60 ° C. and has a heating switch 32 for starting heating.
[0021]
Reference numeral 33 denotes a second hot water outlet provided at an intermediate height position of the hot water storage tank 16, and an input side of the second mixing valve 34 provided between the first hot water outlet 13 of the first hot water pipe 12 and the first mixing valve 27. Are connected via a second hot water discharge pipe 35. The second hot water outlet 33 and the second hot water discharge pipe 35 are used to discharge hot water from the hot water storage tank 16 from the hot water storage tank 16 with the temperature lowered by heat exchange with the secondary side in the heat exchanger 20. The first mixing valve 27 is mixed with high-temperature water flowing through the first hot water discharge pipe 12 by the valve 34.
[0022]
The second mixing valve 34 is composed of a thermo wax mixing valve as shown in FIG. 5, and the position of the valve body 34b of the inlet side port is changed by expansion and contraction of the thermo wax 34a provided on the output port side. The mixing ratio is adjusted accordingly, and the mixing is automatically performed at about 65 ° C., which is higher than 60 ° C., which is the upper limit temperature of the hot water supply set temperature range. The mixing temperature of the second mixing valve 34 can be adjusted by the adjusting knob 34c. Although the thermowax mixing valve is used here, a temperature-sensitive automatic mixing valve using a temperature-sensitive deformation member such as a temperature-sensitive spring or a bimetal made of a shape memory alloy that is temperature-sensitive deformed may be used instead. Further, the second mixing valve 34 is not limited to the illustrated valve, valve seat shape, and flow path shape, and the main point is that the second mixing valve 34 is automatically mixed to the set mixing temperature by deformation of the temperature-sensitive deformation member. The shape of the valve, the valve seat, and the flow path can be changed without changing the gist of the invention.
[0023]
A plurality of hot water storage temperature sensors 36 are arranged in the vertical direction of the hot water storage tank 16, and the hot water storage temperature sensor 36 detects whether a predetermined temperature (for example, 50 ° C.) or higher is detected in the hot water storage tank 16. This is to detect how much heat is left.
[0024]
Reference numeral 37 denotes a hot water supply control unit having a microcomputer that receives an input from a sensor in the hot water storage tank unit and controls driving of the actuator. The remote controller 30 is connected to the hot water supply control unit 37 by radio or wire so that the user can set an arbitrary hot water supply set temperature.
[0025]
In addition, 38 is an overpressure prevention valve for preventing overpressure of the hot water storage tank 16, 39 is a water supply temperature sensor for detecting the temperature of the water supply, 40 is a pressure reducing valve for reducing the pressure of the water supply, and 41 is an amount of hot water to supply hot water. This is a flow counter.
[0026]
Next, the operation of the first embodiment will be described.
First, the boiling operation shown in FIG. 2 will be described. When the hot water storage temperature sensor 36 detects that the necessary amount of heat does not remain in the hot water storage tank 16 in the late-night power time zone, the hot water supply control unit 37 operates as a heat pump. A boiling start command is issued to the control unit 11. Upon receiving the command, the heat pump control unit 11 starts driving the heat pump circulation pump 10 after starting the compressor 5, and cools the water at a temperature of about 5 to 20 ° C. taken out from the heat pump outlet 17 at the bottom of the hot water storage tank 16. Heated to a high temperature of about 70 to 90 ° C. with the exchanger 6, returned to the hot water storage tank 16 through the heat pump return circuit 18 at the upper part of the hot water storage tank 16 through the heat pump circulation circuit 19, and sequentially stacked from the upper part of the hot water storage tank 16. Hot water is stored. When the hot water storage temperature sensor 36 detects that the required amount of heat has been stored, the hot water supply control unit 37 issues a boiling stop command to the heat pump control unit 11, and the heat pump control unit 11 stops the compressor 5 and heat pump circulation. The pump 10 is also stopped and the boiling operation is finished.
[0027]
Next, the heating operation shown in FIG. 3 will be described. When the heating switch 32 of the remote controller 30 is turned ON, the hot water supply control unit 37 starts driving the heat utilization circulation pump 23 and the secondary circulation pump 26, and the high-temperature water outlet 21. The high temperature water of about 70 to 90 ° C. taken out from the flow is introduced into the heat exchanger 20 to exchange heat with the warm water of the secondary circuit 25, and the medium temperature water whose temperature has been lowered to about 30 to 50 ° C. by the heat exchange is returned to the medium temperature water. The hot water is stored in such a manner as to return to the lower part of the hot water storage tank 16 from the port 22 and push up the boundary surface of the high temperature water and the intermediate temperature water so as to replace the high temperature water. On the secondary side, hot water heated by the heat exchanger 20 flows into the floor heating panel 4, heats the space to be heated, and circulates again to the heat exchanger 20. Then, when the heating switch 32 of the remote controller 30 is turned off, the hot water supply control unit 37 stops driving the heat utilization circulation pump 23 and the secondary side circulation pump 26 to stop the heating operation.
[0028]
The hot water supply operation shown in FIG. 4 will be described. When the hot water supply mixer tap 3 is opened, the hot water in the hot water storage tank 16 is pushed out from the first hot water outlet 13 at the upper end by the supply water pressure from the water supply pipe 14. Medium temperature water is pushed out from the second hot water outlet 33. The extruded high-temperature water of about 70 to 90 ° C. and medium-temperature water of about 30 to 50 ° C. flow into the second mixing valve 34 through the first hot water pipe 12 and the second hot water pipe 35 respectively, and hot water of about 65 ° C. To be mixed. The mixed hot water flows into the first mixing valve 27, is mixed with low temperature water of about 5 to 20 ° C. from the water supply pipe 14, is adjusted to a hot water supply set temperature set by the user with the remote controller 30, and the hot water mixed tap 3 Hot water is supplied from.
[0029]
At this time, since the intermediate hot water return port 22 is provided in the hot water storage tank 16 at a position higher than the water supply port 15 at the lowermost end of the hot water storage tank 16 and the lower heat pump outlet port 17, Even if the hot water is returned to the lower part of the hot water storage tank 16, the low temperature water from the water supply pipe flows from the lower end of the hot water storage tank 16 due to the use of the hot water supply, so that the low temperature water is secured at the lowermost end of the hot water storage tank 16. At the time of the next boiling, there is an effect that it can be heated from low temperature water. Further, the high temperature water outlet 21 is provided in the middle of the first hot water pipe 12 connected to the first hot water outlet 13, and the opening of the hot water storage tank 16 can be reduced.
[0030]
In addition, since the second hot water outlet 33 is provided at a position higher than the intermediate hot water return port 22, a certain amount of capacity can be secured between the intermediate hot water return port 22 and the second hot water outlet 33, and the heat exchanger 20. Thus, it is possible to temporarily store the medium-temperature water whose temperature has been lowered by that amount, and the amount of medium-temperature water that is stored at a position higher than the second hot water outlet 33 can be reduced. Specifically, since the second hot water outlet 33 is at an intermediate height position of the hot water storage tank 16, a capacity of about 90 to 120L can be secured between the intermediate hot water return port 22 and the second hot water outlet 33, and the heat exchanger Accordingly, the medium-temperature water whose temperature has been lowered at 20 can be temporarily stored by the amount, and the amount of medium-temperature water that is stored at a position higher than the second hot water outlet 33 can be reduced. That is, it is possible to reduce the amount of medium-temperature water that cannot be taken out from the second hot water outlet 33 as much as possible.
[0031]
Here, if the intermediate warm water return port 22 and the second hot water outlet 33 are at the same height, the intermediate warm water may be stored at a position higher than the intermediate warm water return port 22. Since it cannot be taken out from the second hot water outlet 33 at the same height as the hot water return port 22, it is necessary to use the intermediate warm water for hot water supply at the same time as the intermediate hot water is generated. The hot water is stored in the hot water storage tank 16 until the hot water is pushed up to the first hot water outlet 13 at the upper end of the hot water storage tank 16. However, in the first embodiment, since the second hot water outlet 33 is provided at a position higher than the intermediate warm water return port 22 as described above, from the generation to use of the intermediate warm water by the capacity corresponding to the difference in height. Therefore, there is an effect that even if hot water is supplied at a time interval after intermediate warm water is generated for a certain volume, the hot water can be used for hot water supply.
[0032]
In addition, as shown in FIG. 6, when there is no hot water in the hot water storage tank 16 in the hot water supply without heating or immediately after the completion of boiling, there is no hot water in the second hot water outlet 33 position. The thermo-wax 34a 34 expands because it is exposed to a temperature atmosphere equal to or higher than the set mixing temperature, the valve body 34b on the first hot water discharge pipe 12 side is closed, and the valve body 34b on the second hot water discharge pipe 35 side is opened. Become. As a result, hot water having a temperature equal to or higher than the set mixing temperature is supplied to the first mixing valve 27. The hot water is mixed with the low temperature water from the water supply pipe 14 by the first mixing valve and adjusted to the hot water supply set temperature set by the user using the remote controller 30. Will be.
[0033]
In addition, as shown in FIG. 7, hot water is present in the upper part of the hot water storage tank 16, but when low temperature water is present near the second hot water outlet 33, the thermowax 34 a of the second mixing valve 34 is the first. Since it is exposed to the hot water in which the high temperature water from the tapping pipe 12 and the low temperature water from the second tapping pipe 35 are mixed, it expands and contracts according to the temperature and automatically reaches a set mixing temperature of about 65 ° C. It is to be adjusted. In FIGS. 5 to 7, only the components necessary for the explanation are extracted and disclosed, and although not shown, the configuration is the same as that of FIG. 1.
[0034]
In this way, since the hot water used as a heating heat source during hot water supply is taken out from the hot water storage tank 16 in preference to the hot water, hot water is supplied until the hot water can be fully supplied. When there is no problem, the hot water in the hot water storage tank 16 decreases every time hot water is supplied, and is replaced with low-temperature water from the water supply pipe 14, and when performing a boiling operation at midnight, the temperature of the hot water is not low. The low-temperature water is boiled by the heat pump circuit 9, which improves the efficiency of boiling and improves the COP (energy consumption efficiency) as a heat pump type hot water supply apparatus.
[0035]
Further, the second mixing valve 34 mixes to a temperature equal to or higher than the upper limit temperature of the hot water supply set temperature range adjusted by the first mixing valve 27, and then mixes to an arbitrary hot water set temperature by the first mixing valve 27 to supply hot water. Therefore, hot water having an arbitrary hot water supply set temperature set by the remote controller 30 can always be reliably supplied without any special operation on the user side.
[0036]
Further, since the second mixing valve 34 is an automatic mixing valve using a temperature sensitive deformation member such as a thermo wax mixing valve, the output port and the input port of the microcomputer used in the hot water supply control unit 37 are not used at all. In addition to being able to mix with the set temperature and using an inexpensive microcomputer with few ports, the surplus ports can be allocated to other functions, contributing to the realization of an inexpensive and multifunctional hot water supply system. is there.
[0037]
Next, a second embodiment will be described based on FIG. In addition, the same code | symbol is attached | subjected to the same thing as the said 1st Embodiment, and the description is abbreviate | omitted.
[0038]
In the second embodiment, the hot water in the hot water storage tank 16 is circulated directly to the heating load terminal 4 via the heat utilization circulation circuit 24. When the start of heating is instructed by turning on the heating switch 32, the heat-use circulation pump 23 is driven to circulate the high-temperature water in the hot water storage tank 16 from the high-temperature water outlet 21 to the heating load terminal 4 to compare the bathroom and the like. The heated room with a small target load is heated to become medium-temperature water whose temperature has dropped to about 30 to 50 ° C., and returns to the hot water storage tank 16 from the low-temperature water return port 22.
[0039]
As described above, in the second embodiment, whether the high-temperature water taken out from the hot water storage tank 16 is directly or indirectly used as a heat source is different from the first embodiment, and other functions and effects can be changed. Therefore, the description thereof will be omitted as referring to the first embodiment. The heating load terminal is not limited to the illustrated floor heating panel, and may be, for example, a hot water hot air heater, a hot water panel convector, a hot water panel radiator, etc. Therefore, it does not prevent the embodiment from being changed without changing the gist of the present invention.
[0040]
Next, a third embodiment will be described based on FIG. In addition, the same code | symbol is attached | subjected to the same thing as the said 1st or 2nd embodiment, and the description is abbreviate | omitted.
[0041]
Reference numeral 34 'denotes a second mixing valve formed by an electric mixing valve provided between the first mixing valve 27 of the first tap pipe 12 and the first tap port 13, and the temperature detected by the mixing temperature sensor 42 provided downstream thereof. Accordingly, the mixing ratio is adjusted so that the temperature becomes a predetermined temperature higher than an arbitrary hot water supply set temperature set by the remote controller 30.
[0042]
The heat exchanger 20, the heat utilization circulation pump 23, and the secondary circulation pump 26 are housed in a heat exchange unit 43 that is separate from the hot water tank unit 2, and the heat provided in the heat exchange unit 43. The pumps 23 and 26 are controlled by the exchange control unit 44, and the second remote controller 45 is connected to the heat exchange control unit 44 by wire or wirelessly. The start and stop of heating are input by operating the second remote controller 45. The remote controller 30 can perform only operations related to hot water supply, and the operation related to heating can be performed by the second remote controller 45.
[0043]
As described above, the second mixing valve 34 ′ is used as an electric mixing valve, and the mixing ratio is adjusted so as to be a predetermined temperature higher than an arbitrary hot water supply set temperature set by the remote controller 30. The hot water supply can be used in a large amount according to the set hot water temperature, and the use of medium temperature water can be promoted. For example, if an arbitrary hot water supply set temperature is 60 ° C., the mixing temperature of the second mixing valve 34 ′ of the electric mixing valve is set to 65 ° C., which is 5 degrees higher than 60 ° C., and the hot water mixed at 65 ° C. is supplied to the first mixing valve 27. Hot water is supplied by adjusting to an arbitrary hot water supply set temperature of 60 ° C. If the arbitrary hot water supply set temperature is 42 ° C., the mixing temperature of the second mixing valve 34 ′ of the electric mixing valve is set to 47 ° C., which is 5 degrees higher than 42 ° C., and the hot water mixed at 47 ° C. is mixed with the first mixing valve 27. Then, hot water is supplied by adjusting to an arbitrary hot water supply set temperature of 42 ° C. In this way, hot water can be supplied using as much medium hot water as possible according to any hot water set temperature at that time.
[0044]
In the first embodiment and the third embodiment, the heat exchanger 20, the heat utilization circulation pump 23, and the secondary circulation pump 26 are installed in different forms, but the heat exchange in the first embodiment is different. The unit 43 may be provided, and conversely, it may be provided in the hot water storage tank unit 2 in the second embodiment, and does not preclude changing the embodiment without changing the gist of the present invention. .
[0045]
Moreover, in 1st Embodiment and 3rd Embodiment, although the heating load terminal 4 which consists of a floor heating panel is made into the load of the secondary side circuit 25, it is not restricted to this, A hot water type hot air heater Or a hot water panel convector or a hot water panel radiator may be used. Further, the load on the secondary circuit 25 is not limited to heating, but for example, the hot water in the bathtub may be circulated and used for bathing or keeping warm. In short, the heat of the hot water in the hot water storage tank 16 is exchanged. Any thermal device can be used as long as it is used by exchanging heat in the vessel 20.
[0046]
【The invention's effect】
  As described above, according to claim 1 of the present invention, the medium-temperature water having a small amount of retained heat per capacity used as the heating heat source can be mixed with the high-temperature water taken out from the upper part of the hot water storage tank during hot water supply and used for hot water supply. In addition, when boiling is performed in the heat pump circuit, efficient boiling can be performed, and COP (energy consumption efficiency) as a heat pump type hot water supply device is not lowered, and second hot water is taken out. Since the hot water outlet is located higher than the return port for medium hot water, even if the hot water is stored in the hot water storage tank for a certain amount of time and then hot water is supplied at intervals, the intermediate hot water is used for hot water supply. Can be usedBecause the set mixing temperature of the second mixing valve is higher than the arbitrary hot water supply set temperature in the first mixing valve, hot water is supplied using as much medium hot water as possible according to the arbitrary hot water set temperature at that time. Is something that can be done.
[0047]
  Further, according to claim 2, since the medium temperature water having a small amount of retained heat per capacity used as a heating source for the secondary circuit can be mixed with high temperature water taken out from the hot water storage tank at the time of hot water supply, it can be used for hot water supply. When boiling in a heat pump circuit, efficient boiling can be performed, and COP (energy consumption efficiency) as a heat pump type hot water supply device is not reduced, and the second output for taking out the medium temperature water The hot water tap is located higher than the return port of the medium temperature water, so even if the hot water is stored in the hot water storage tank for a certain amount of time and the hot water is supplied at intervals, this medium temperature water is used for the hot water supply. It is possibleBecause the set mixing temperature of the second mixing valve is higher than the arbitrary hot water supply set temperature in the first mixing valve, hot water is supplied using as much medium hot water as possible according to the arbitrary hot water set temperature at that time. Is something that can be done.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.
FIG. 2 is a view for explaining an operation of a boiling operation according to the first embodiment.
FIG. 3 is a view for explaining the operation of the heating operation of the first embodiment.
FIG. 4 is a view for explaining an operation of a hot water supply operation according to the first embodiment.
FIG. 5 is a view for explaining the operation of a second mixing valve during a hot water supply operation when medium-temperature water is present in the vicinity of a second hot water outlet in the hot water storage tank of the first embodiment.
FIG. 6 is a view for explaining the operation of the second mixing valve during a hot water supply operation when high-temperature water is present in the vicinity of a second hot water outlet in the hot water storage tank of the first embodiment.
FIG. 7 is a view for explaining the operation of the second mixing valve during a hot water supply operation when low temperature water is present near the second hot water outlet in the first hot water storage tank.
FIG. 8 is a schematic configuration diagram of a second embodiment of the present invention.
FIG. 9 is a schematic configuration diagram of a third embodiment of the present invention.
FIG. 10 is a schematic configuration diagram of a conventional example.
[Explanation of symbols]
4 Heating load terminal
5 Compressor
6 Refrigerant-water heat exchanger (condenser)
8 Evaporator
9 Heat pump circuit
12 First tap pipe
13 First tap
14 Water supply pipe
15 Water inlet
16 Hot water storage tank
17 Heaton
18 Heaton Return Exit
19 Heaton circuit
20 Heat exchanger
21 Hot water outlet
22 Middle hot water return port
23 Heat-use circulation pump
24 Heat utilization circuit
25 Secondary circuit
27 First mixing valve (electric mixing valve)
28 Hot water supply pipe
33 Second tap
34 Second mixing valve (thermo wax mixing valve)
34 '2nd mixing valve (electric mixing valve)
34a Thermo wax (temperature-sensitive deformation member)
35 Second tap pipe
42 Mixed temperature sensor

Claims (2)

  1. A hot water storage tank having a water supply port through which a low temperature water flows from a water supply pipe at the lower end and a first hot water outlet for discharging hot water stored in the hot water from the first hot water discharge pipe at the upper end, a compressor, an evaporator and a condenser A heat pump circuit having a heater, and a low temperature water taken out from a heat pump outlet provided at a lower part of the hot water storage tank is heated by a condenser of the heat pump circuit, and the heated high temperature water is provided at an upper part of the hot water storage tank. Heat pump circulation circuit for returning from the return port into the hot water storage tank, and heating by the high temperature water taken out from the high temperature water outlet provided at the upper part of the hot water storage tank. and heat utilization circulation circuit back to the hot water return port, a remote controller and the hot water supply temperature can be set to any hot water set temperature has a hot water temperature setting switch, out of the first A first mixing valve for mixing the cold water from the hot water and the water supply pipe flowing out of the mouth to the arbitrary hot water set temperature set by the remote controller, heat pump having a hot-water supply temperature sensor provided downstream thereof A hot water supply apparatus, wherein a second hot water outlet and a second hot water outlet pipe are provided for allowing the intermediate hot water to flow out at a position higher than the intermediate hot water return port of the hot water storage tank and lower than the first hot water outlet; A second mixing valve for mixing medium temperature water from the second tapping pipe in the middle of the first tapping pipe between the first mixing valve and the first tapping outlet, and a mixing temperature sensor provided downstream thereof; The hot water from the hot water outlet and the medium hot water from the second hot water outlet are mixed by the second mixing valve to a temperature higher than the arbitrary hot water supply set temperature by a predetermined temperature according to the output of the mixing temperature sensor , and Said second at the first mixing valve To hot water mixed with the optional hot water temperature setting in accordance with than the arbitrary hot water set temperature is mixed jointly with a predetermined temperature higher temperature of the hot water and cold water from the water supply pipe to the output of the hot water supply temperature sensor A heat pump type hot water supply apparatus characterized by being made as described above.
  2. A hot water storage tank having a water supply port through which a low temperature water flows from a water supply pipe at the lower end and a first hot water outlet for discharging hot water stored in the hot water from the first hot water discharge pipe at the upper end, a compressor, an evaporator and a condenser A heat pump circuit having a heater, and a low temperature water taken out from a heat pump outlet provided at a lower part of the hot water storage tank is heated by a condenser of the heat pump circuit, and the heated high temperature water is provided at an upper part of the hot water storage tank. Circulating a high temperature water taken out from a high temperature water outlet provided in the upper part of the hot water storage tank to a heat exchanger for heating the hot water in the secondary side circuit; and heat utilization circulation circuit back to the hot water return port in which is provided a hot water lower the hot water storage tank in which the temperature was lowered to hot water heat exchanger of the secondary circuit, the hot water temperature setting switch A remote controller and the hot water supply temperature can be set to any of the water heater setting temperature, on the arbitrary hot water set temperature and low-temperature water has been set by the remote control from the water supply pipe and the hot water flowing out from the first tapping port A heat pump type hot water supply apparatus including a first mixing valve to be mixed and a hot water supply temperature sensor provided downstream thereof, at a position that is higher than the intermediate hot water return port of the hot water storage tank and lower than the first hot water outlet. A second hot water outlet and a second hot water outlet pipe for allowing the intermediate hot water to flow out are provided, and intermediate hot water from the second hot water outlet pipe is provided in the middle of the first hot water outlet pipe between the first mixing valve and the first hot water outlet. A mixing temperature sensor is provided downstream of the second mixing valve, and high-temperature water from the first outlet and intermediate-temperature water from the second outlet are output from the mixing temperature sensor by the second mixing valve. wherein any of the hot water supply set in accordance with the Than the temperature were mixed at a predetermined temperature higher temperatures, lower temperatures water from the water supply pipe to a predetermined temperature higher temperatures of the hot water than the second mixing valve wherein any hot water set temperature is mixed with at the first mixing valve A heat pump type hot water supply apparatus, wherein hot water is mixed with the arbitrary hot water supply set temperature in accordance with the output of the hot water temperature sensor .
JP2002039478A 2002-02-18 2002-02-18 Heat pump type water heater Active JP3854169B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002039478A JP3854169B2 (en) 2002-02-18 2002-02-18 Heat pump type water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002039478A JP3854169B2 (en) 2002-02-18 2002-02-18 Heat pump type water heater

Publications (2)

Publication Number Publication Date
JP2003240342A JP2003240342A (en) 2003-08-27
JP3854169B2 true JP3854169B2 (en) 2006-12-06

Family

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Country Link
JP (1) JP3854169B2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4484213B2 (en) * 2005-01-25 2010-06-16 東芝機器株式会社 Water heater
JP4485406B2 (en) * 2005-04-25 2010-06-23 東京電力株式会社 Hot water storage water heater
JP4725202B2 (en) * 2005-06-09 2011-07-13 パナソニック株式会社 Hot water storage water heater
JP4591221B2 (en) * 2005-06-09 2010-12-01 パナソニック株式会社 Hot water storage water heater
JP4752347B2 (en) * 2005-06-22 2011-08-17 パナソニック株式会社 Hot water storage water heater
JP4654845B2 (en) * 2005-09-05 2011-03-23 パナソニック株式会社 Hot water storage water heater
JP4654844B2 (en) * 2005-09-05 2011-03-23 パナソニック株式会社 Hot water storage water heater
JP4654846B2 (en) * 2005-09-05 2011-03-23 パナソニック株式会社 Hot water storage water heater
JP4654851B2 (en) * 2005-09-12 2011-03-23 パナソニック株式会社 Hot water storage water heater
JP2008151467A (en) * 2006-12-20 2008-07-03 Matsushita Electric Ind Co Ltd Hot water storage type water heater
JP4876899B2 (en) * 2006-12-25 2012-02-15 パナソニック電工株式会社 Hot water system
JP4962104B2 (en) * 2007-04-09 2012-06-27 パナソニック株式会社 Hot water storage water heater
JP2009109177A (en) * 2007-10-09 2009-05-21 Panasonic Corp Bath heating device and heat pump water heater having the same
KR101047280B1 (en) * 2008-05-26 2011-07-07 주식회사 한 에너지 시스템 Boiler system with double hot water tank

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