JP4743008B2 - Heat pump type water heater - Google Patents

Description

  The present invention relates to a heat pump type hot water supply apparatus that supplies hot water to a hot water supply use side terminal using hot water supply water boiled by a heat pump unit.

A conventional heat pump hot water supply apparatus includes a first unit in which a refrigeration cycle configured by filling a refrigerant in a refrigerant circuit in which components such as a compressor and a heat exchanger are connected in an annular shape and a first hot water storage tank are disposed. The second unit is provided with a second hot water storage tank. And functional parts, such as a pump and a mixing valve which control the flow of hot water for water supply, are arrange | positioned using the empty space between the inner wall surface of the housing | casing which forms a unit, and the outer wall surface of a tank ( For example, see Patent Document 1).
JP 2005-265213 A

  However, in the above conventional heat pump type hot water supply apparatus, hot water for water flowing through functional parts such as a pump and a mixing valve may remain in each part, and when the outside air temperature is low, There was a problem of freezing. And such a conventional heat pump type hot water supply apparatus is provided with a heater for heating functional parts and piping in order to prevent freezing.

  Accordingly, an object of the present invention has been made in view of the above problems, and is to provide a heat pump type hot water supply apparatus that warms water retained in a functional component without using a heater and reduces freezing of the functional component. is there.

In order to achieve the above object, the following technical means are adopted. That is, the invention of the heat pump type hot water supply apparatus according to claim 1 is a heat pump unit (1) that heats hot water supply water by exchanging heat with a high-temperature and high-pressure refrigerant, and hot water storage that stores hot water supply water heated by the heat pump unit (1). It has a function of controlling the flow of the hot water supply water and the hot water use side terminal from which the hot water for hot water heated by the tank (2), the heat pump unit (1) is discharged directly or through the hot water storage tank (2), Functional parts (4, 5, 13, 17, 19, 23, 35, 40, 41, 46, 49, 57) provided to communicate with the hot water storage tank (2) or the hot water usage side terminal, and the hot water usage side And a hot water on / off valve (41) for opening and closing a hot water supply water flow path (18) filled in a bathtub as a terminal, and the functional parts (4, 5, 13, 17, 19, 2). , 35,40,41,46,49,57) is disposed at a position higher than the upper surface of the hot water storage tank (2), when the further hot water storage tank (2) in plan view, outside of the hot water storage tank (2) Located on the periphery or on the inner side of the outer periphery, the functional component includes a backflow water release valve (46) for releasing backflow water flowing into the hot water on / off valve (41). . In addition, the upper surface of the hot water storage tank (2) is a surface facing upward among the surface portions forming the hot water storage tank (2), and is, for example, a top surface constituting the ceiling portion of the tank.

According to the present invention, by disposing the functional component at a position higher than the upper surface of the hot water storage tank, the amount of heat released from the hot water at the top of the hot water stored in the hot water storage tank, or the top of the tank. The amount of heat released from the hot water supply pipe that protrudes from the surface and the like from which hot water flows out is transmitted to the functional component, so that the water remaining in the functional component is warmed, and freezing of the functional component can be reduced. Further, when a plurality of functional parts are arranged, it is possible to reduce the piping length between the functional parts, the assembling man-hours of the pipe, and the pressure loss of the pipe. Further, the heat radiation generated from the tank, the hot water supply pipe, or the like can be reliably given to the functional parts. In addition, when multiple functional parts are arranged, the functional parts are arranged so as to gather in the center of the tank in plan view, making it easier to receive heat from the piping and the length of the piping between the functional parts. In addition, it is possible to further reduce the assembling man-hours of piping and the pressure loss of piping. Further, according to the present invention, since the backflow opening valve through which the backflowing water flows easily retains water, it is possible to obtain a remarkable effect on the reduction of freezing by applying heat to the backflow opening valve.
According to claim 2, the backflow water release valve (46) according to claim 1 is arranged at the lowest position among the functional parts arranged above the top surface of the hot water storage tank (2). preferable. According to this invention, since the backflow water release valve is at a low position, it becomes easy to drain backflow water downward.

According to a third aspect of the invention, in the invention of the first or second aspect , the functional component is preferably disposed above the top of the hot water storage tank (2). According to this invention, the functional component can receive more reliably the heat released upward when the hot water in the uppermost part of the tank flows through the hot water supply pipe.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a hot water storage tank (2) and a casing (61) for storing functional parts are provided. It is preferable that it is disposed at a position higher than the top of the hot water storage tank (2).

  According to the present invention, the heat released upward when the hot water at the top of the tank flows through the hot water supply pipe stays between the top of the tank and the top surface of the casing. Will rise, and the functional parts can be further warmed.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the position of the functional component is the same as that of the hot water supply pipe (22) from which hot water stored in the hot water storage tank (2) flows out. Or, it is preferably above the hot water supply pipe (22). According to the present invention, the amount of heat released from the hot water supply pipe from which the high-temperature water flows can be reliably transmitted to the functional component.

The invention of claim 6 is the invention of claim 5 , wherein the hot water storage tank (2) is provided with a heat insulating material (62) for reducing heat dissipation, and the hot water supply pipe (22) faces the heat insulating material (62). Preferably it is. According to this invention, the hot water supply water in the tank in which heat dissipation from the tank surface is suppressed by the heat insulating material will radiate when flowing in the hot water supply pipe, and the functional component receives heat dissipation at this time, Furthermore, the heat receiving effect of the functional component can be enhanced.

The invention according to claim 7 is the invention according to any one of claims 1 to 6 , wherein the functional component preferably includes a mixing valve (4, 5, 17, 23). According to the present invention, since water tends to stop when there is no running water in the mixing valve into which water flows from at least two flow paths, a remarkable effect can be obtained for reducing freezing by applying heat to the mixing valve. .

The invention according to claim 8 is the invention according to claim 7 , wherein a plurality of mixing valves (4, 5, 17, 23) are provided, and the plurality of mixing valves are provided on the top surface of the hot water storage tank (2). It is preferable that they are arranged at the same height above.

  According to this invention, since the plurality of mixing valves can be arranged as a unit by arranging the plurality of mixing valves at the same height above the top surface of the tank, it is possible to reduce freezing in the hot water supply circuit. The effect can be improved, and construction and maintainability are improved. Moreover, it is easy to maintain the pressure balance between the mixing valves.

The invention according to claim 9 is the invention according to claim 8 , wherein the plurality of mixing valves includes a hot water mixing valve (17) for adjusting the temperature of hot water to the bathtub, which is a hot water use side terminal, and hot water use. It is preferable that the hot water mixing valve (23) controls the temperature of the hot water to the hot water faucet which is the side terminal.

  According to this invention, the mixing valve for hot water supply and the mixing valve for hot water filling are arranged at the same height above the top surface of the hot water storage tank, so that the pressure of the hot water to the hot water tap and the hot water to the bathtub is increased. The effect is that it becomes easier to maintain the balance.

According to a tenth aspect of the present invention, in the invention according to any one of the first to ninth aspects, the functional component preferably includes a pressure reducing valve (13) provided in a city water pipe (14) for taking in city water. . According to the present invention, when there is an interval between hot water outlets, for example, when there is no trip, for example, when the hot water supply device is installed and before entering the residence, water stopped at the pressure reducing valve may freeze. A significant effect of reducing freezing can be obtained by applying warm heat.

According to an eleventh aspect of the present invention, in the invention according to any one of the first to tenth aspects, the functional component includes a relief valve (35) for reducing the pressure in the hot water storage tank (2). The valve (35) is preferably arranged at the highest position among the functional parts arranged above the top surface of the hot water storage tank (2). According to the present invention, it is possible to enhance the function of the relief valve that escapes air to the outside and lowers the pressure.

According to a twelfth aspect of the present invention, in the invention according to any one of the first to eleventh aspects, the functional component preferably includes a circulation pump (19, 49). According to the present invention, when there is an interval between hot water outlets, for example, when there is no trip, for example, during the period before installation after installation of the device, water is likely to be retained in the circulation pump and may freeze. By giving warm heat to the circulation pump, there is a remarkable effect on freezing, and installation of a heater for preventing freezing can be eliminated.

According to a thirteenth aspect of the present invention, in the invention according to any one of the first to twelfth aspects, the functional component includes a reheating heat exchanger (57) for retreating the bath water in the bathtub. Is preferred. According to the present invention, when there is an interval between hot water outlets, for example, when there is no trip or the like, or during a period before installation after the hot water supply device is installed, water stops in the flow path of the reheating heat exchanger. Since it is easy, the remarkable effect with respect to freezing is acquired by giving warm heat to the reheating heat exchanger.

The invention of claim 14 is the invention according to any one of claims 1 to 13 , wherein the heat pump unit (1) and the hot water storage tank (2) are housed in the housing (61) and integrated in appearance. In addition, it is preferable to dispose a pipe take-out part (52, 53, 54) for connecting a pipe communicating with the hot water use side terminal in the upper part (56) of the casing (61).

  According to the present invention, since the pipe take-out portion is arranged in a place near the place where the functional parts are arranged, the length of the pipe and the pressure loss of the pipe can be reduced, and the maintenance and the pipe assembling work can be performed collectively on the upper part of the housing. Can do.

A fifteenth aspect of the invention is the invention according to any one of the first to thirteenth aspects, wherein the heat pump unit (1) and the hot water storage tank (2) are housed in the housing (61) and integrated in appearance. In addition, it is preferable to dispose a pipe take-out portion (52, 53, 54) for connecting a pipe communicating with the hot water use side terminal in the lower part (56A) of the casing (61).

  According to the present invention, the piping is routed downward from the location where the functional parts are disposed to arrange the piping take-out portion, so that maintenance and piping assembly work are performed at the lower part of the lower portion of the housing where the burden on the operator is light. be able to.

A sixteenth aspect of the present invention is the invention according to any one of the first to thirteenth aspects, wherein the heat pump unit (1) and the hot water storage tank (2) are provided in separate housings (61, 65) to use hot water. A pipe take-out portion (52, 53, 54) for connecting a plurality of pipes communicating with the side terminal and the heat pump unit (1) is connected to an upper part (56) of the casing (61) in which the hot water storage tank (2) is stored. ) Is preferable.

  According to the present invention, the pipe take-out portion is arranged near the place where the functional parts are arranged, so that the length of the pipe and the pressure loss of the pipe can be reduced, and the maintenance and the pipe assembling work are integrated at the upper part of the casing of the hot water storage tank. Can be done.

The invention of claim 17 is the invention according to any one of claims 1 to 13 , wherein each of the heat pump unit (1) and the hot water storage tank (2) is provided in a separate casing (61, 65) to use hot water. A pipe take-out part (52, 53, 54) for connecting a plurality of pipes communicating with the side terminal and the heat pump unit (1), a lower part (56A) of the casing (61) in which the hot water storage tank (2) is stored It is preferable to arrange in.

  According to the present invention, the pipe is drawn out from the location where the functional parts are arranged in the casing to arrange the pipe take-out portion. Can be done.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
The configuration of the heat pump type hot water supply apparatus 60 and the arrangement configuration of each part in the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram showing a heat pump type hot water supply apparatus 60 and a piping configuration in the present embodiment.

  The heat pump type hot water supply device 60 of the present embodiment is a hot water storage type heat pump type hot water supply device, which is mainly used for general household use, and hot water for hot water stored in the hot water storage tank 2 or a heat pump unit. The hot water boiled in 1 is supplied to the hot water use side terminal for kitchens, washrooms, bathrooms, and the like. The hot water use side terminal is a hot water faucet such as a shower, a currant, a hand-washing tap, or a bath tub.

  As shown in FIG. 1, the heat pump type hot water supply apparatus is heated by a water / refrigerant heat exchanger 1a and heat pump unit 1 that heats water by exchanging heat with a high-temperature / high-pressure refrigerant and water / refrigerant heat exchanger 1a. A hot water storage tank 2 for storing hot water and a control device (not shown) which is a control means for controlling the operation of the hot water supply device are provided.

  The heat pump hot water supply device 60 is configured so that the water in the hot water storage tank 2 returns to the high temperature water section in the upper part of the hot water storage tank 2 through the water flow path of the water / refrigerant heat exchanger 1a as a main pipe through which hot water is supplied. A circulation pipe 10 for connecting the hot water storage tank 2 and the water / refrigerant heat exchanger 1a, a hot water supply pipe 22 through which hot water in the hot water section in the hot water storage tank 2 flows out to the hot water use side terminal, and water / refrigerant heat Direct hot water supply piping 3 connecting the hot water heated by the exchanger 1a to the hot water storage tank 2 and the hot water supply piping 22, and the intermediate hot water portion in the hot water storage tank 2 and the direct hot water piping 3 are connected. Medium-temperature water piping 36.

  Furthermore, the hot water supply pipe 22 communicates with a shower, a currant, a hand-washing plug, etc., and the pipe that branches off in the middle is a bath pipe 18 that communicates with the bath tub. A city water inflow pipe 15 branched from a city water pipe 14 for taking in city water such as tap water is connected to the lower part of the hot water storage tank 2. A water supply pipe 16 communicating with the city water pipe 14 is connected to the circulation pipe 10. The city water pipe 14 is provided with a stop cock 21 capable of stopping water supply, and further provided with a water supply temperature thermistor 34 for detecting the water temperature of the water supply.

  The hot water storage tank 2 is a container for storing hot water for hot water supply, and is made of a metal having excellent corrosion resistance, for example, stainless steel. A heat insulating material (not shown) is provided on the outer periphery of the hot water storage tank 2 for a long time. Can be kept warm across. The hot water storage tank 2 has a vertically long shape, and an introduction port 6 is provided on the bottom surface thereof.

  The hot water storage tank 2 is provided with a water temperature thermistor 30 comprising four thermistors arranged in the height direction in order to detect the amount of hot water stored in the hot water storage tank 2 and the hot water storage temperature. The temperature information at the water level of hot water or water filled in the hot water storage tank 2 is output to the control device. Accordingly, the control device can detect the boundary position between the hot water heated in the upper part of the hot water tank 2 and the water before being heated in the lower part of the hot water tank 2 based on the temperature information from the water temperature thermistor 30. Thereby, the hot water storage amount can be detected.

  A city water inflow pipe 15 for supplying city water into the hot water storage tank 2 is connected to the introduction port 6. The city water pipe 14 that communicates with the city water inflow pipe 15 is provided with a pressure reducing valve 13 that adjusts the water pressure of the introduced tap water to a predetermined pressure and prevents the back flow of hot water in the case of water interruption. . The city water pipe 14 is connected to a hot water filling mixing valve 17 and a hot water supply mixing valve 23 described later. The city water inflow pipe 15 may be provided with a drain valve for draining.

  The bottom surface of the hot water storage tank 2 is provided with a suction port 8 for sucking water at the bottom of the tank, and the top of the hot water storage tank 2 is provided with a discharge port 12 for discharging hot water at the top of the tank. Yes. The suction port 8 and the discharge port 12 communicate with each other by being connected to the circulation pipe 10 with the water / refrigerant heat exchanger 1a interposed therebetween. A part of the circulation pipe 10 constitutes a water flow path of the water / refrigerant heat exchanger 1a.

  In the circulation pipe 10 between the suction port 8 and the water / refrigerant heat exchanger 1a, an incoming temperature thermistor 31 for detecting the temperature of water supplied to the water / refrigerant heat exchanger 1a, a check valve 28, A circulation pump 9 for forcibly flowing the water in the circulation pipe 10 is provided. A can body protection valve that operates at a predetermined pressure value may be provided upstream of the check valve 28.

  Further, a boiling temperature thermistor 32 for detecting the temperature of the water heated by the water / refrigerant heat exchanger 1a is provided at the outlet of the water / refrigerant heat exchanger 1a. The temperature information detected by any thermistor is also output to the control device. A check valve 29 is provided in the water supply pipe 16 for taking in city water.

  The heat pump unit 1 has a heat pump cycle that uses carbon dioxide having a low critical temperature as a refrigerant. In the heat pump cycle configured by a closed circuit, at least a compressor, a water / refrigerant heat exchanger 1a as a heating unit, a decompressor, And the evaporator is connected. The heat pump unit 1 performs heat exchange between the high-temperature and high-pressure refrigerant flowing through the refrigerant flow path of the water / refrigerant heat exchanger 1a and the water flowing through the water flow path of the water / refrigerant heat exchanger 1a, thereby Can be boiled up. The heat pump unit 1 outputs a signal to the control device. In addition, you may comprise the heat pump unit 1 by the ejector-type cycle using an electric ejector.

  When the heat pump cycle is constituted by a supercritical heat pump, hot water having a temperature higher than that of a general heat pump cycle, for example, about 85 ° C. to 90 ° C. can be stored in the hot water storage tank 2. The heat pump cycle mainly uses boiling water to boil the hot water in the hot water storage tank 2 when the hot water stored in the hot water storage tank 2 is insufficient or by using midnight power during the late night hours when the price is set inexpensively. Do the driving.

  A hot water discharge pipe 3 is directly connected to the circulation pipe 10 in the range from the water flow path outlet of the water / refrigerant heat exchanger 1 a to the hot water storage tank 2. A switching valve 11 is provided at the junction of the direct hot water piping 3 and the circulation piping 10. That is, the switching valve 11 is a flow direction switching means that can flow the hot water heated by the water / refrigerant heat exchanger 1a directly to the hot water supply piping 3 side or the hot water storage tank 2 side according to the water temperature.

  This switching valve 11 is preferably a temperature switching valve that switches the flow direction in accordance with the detected temperature of the fluid. This temperature switching valve is a valve in which the thermal expansion body detects the temperature of the fluid when the fluid contacts the thermoelement, and switches the flow direction of the fluid according to the temperature.

  A lead-out port 7 is provided at the uppermost part of the hot water storage tank 2, and a hot water supply pipe 22 for leading out high-temperature water among hot water for hot water stored in the hot water storage tank 2 is connected to the lead-out port 7. . A discharge pipe provided with a relief valve 35 is connected in the middle of the hot water supply pipe 22, and when the pressure in the hot water storage tank 2 rises above a predetermined pressure, the hot water in the hot water storage tank 2 is discharged. It is configured so as not to discharge to the outside and damage the hot water storage tank 2 or the like.

  The intermediate hot water portion, which is an almost intermediate portion in the hot water storage tank 2, communicates with the intermediate hot water pipe 36 for deriving the intermediate hot water out of the hot water for hot water stored in the hot water storage tank 2. A first mixing valve 4 is provided at the junction of the direct hot water piping 3 and the intermediate hot water piping 36. The first mixing valve 4 allows the hot water flowing directly through the hot water discharge pipe 3 to flow to the hot water supply pipe 22 side, or flows to the middle hot water section side in the hot water storage tank 2 in conjunction with the closing of the second mixing valve 5 described later. You can control the faint.

  In addition, a second mixing valve 5 is provided at the junction of the direct hot water supply pipe 3 and the hot water supply pipe 22, which is downstream of the first mixing valve 4. The second mixing valve 5 is a temperature adjustment valve that adjusts the hot water temperature of the hot water supplied to the hot water mixing valve 17 and the hot water mixing valve 23, and the hot water supply pipe 22 is adjusted by adjusting the ratio of the respective opening areas. The mixing ratio of the hot water taken out from the medium hot water taken out directly from the hot water supply pipe 3 can be adjusted.

  The first mixing valve 4 and the second mixing valve 5 are electrically connected to a control device, and are controlled based on temperature information detected by the water temperature thermistor 30 and the hot water temperature thermistor 33. The hot water thermistor 33 is provided on the downstream side of the second mixing valve 5 and detects the temperature of the hot water mixed by the second mixing valve 5. A hot water supply pipe 22 and a branched bath pipe 18 are connected to a downstream portion of the second mixing valve 5. Here, the temperature information detected by the hot water temperature thermistor 33 is adjusted to be about + 2 ° C. with respect to the bathtub set temperature, the shower set temperature, and the like.

  As described above, the first mixing valve 4 and the second mixing valve 5 use the hot water flowing directly through the hot water discharge pipe 3 through the water / refrigerant heat exchanger 1a as the medium hot water side in the hot water storage tank 2 or the hot water supply pipe 22 side. It functions as a switching means for flowing in

  The hot water supply mixing valve 23 and the hot water filling mixing valve 17 are temperature control valves that adjust the hot water temperature of hot water to be discharged at the ends of the hot water supply pipe 22 and the bath pipe 18, respectively. These are discharged by adjusting the ratio of the respective opening areas, that is, the ratio of the opening degree of the hot water supply water temperature adjusted by the second mixing valve 5 and the opening degree of the water side communicating with the city water pipe 14. Adjust the hot water temperature to the set temperature.

  The hot water mixing valve 23 and the hot water mixing valve 17 are in electrical communication with the control device, and the temperature information detected by the hot water thermistor 34, hot water temperature thermistor 33, hot water thermistor 24, and circulating hot water thermistor 44. Controlled based on.

  The hot water supply thermistor 24 is temperature information in the hot water supply pipe 22, the flow rate counter 25 is information on the flow rate in the hot water supply pipe 22, the circulating hot water supply thermistor 44 is temperature information in the bath pipe 18, and the hot water flow rate counter 42 is in the bath. The flow rate information in the service pipe 18 is output to the control device.

  The second mixing valve 5, the hot water supply mixing valve 23, and the hot water filling mixing valve 17 are detected by a hot water temperature thermistor 33, a hot water supply thermistor 24, or a circulating hot water supply thermistor 44 provided on the respective outlet sides. Feedback control is performed based on the hot water temperature of hot water.

  Further, when the flow rate counter 25 and the hot water flow rate counter 42 detect the flow of water in the hot water supply pipe 22 and the bath pipe 18, hot water faucets and showers at the ends of the respective pipes, which will be described later. The hot water filling solenoid valve 41 is opened to discharge hot water supply water.

  The hot water supply pipe 22 is a pipe that guides hot water supply water whose temperature is adjusted to a set temperature to a hot water tap such as a shower, a currant, and a hand-washing tap connected to the downstream end. A hot water mixing valve 23, a hot water thermistor 24, and a flow rate counter 25 are provided in the middle of the piping, and the hot water piping 22 is connected to a piping that communicates with a hot water usage side terminal at a piping outlet 52.

  The downstream end of the bath pipe 18 is connected to a circulation circuit composed of a bathtub outflow pipe 50 and a bathtub inflow pipe 51, and the temperature is adjusted to a predetermined temperature when hot water is filled in the bathtub, hot water or hot water is used. It is a pipe that guides the hot water supply water. In the middle of the bath piping 18, a hot water filling mixing valve 17 as a temperature adjusting means is provided.

  Furthermore, in the bath pipe 18 on the downstream side of the hot water mixing valve 17, a hot water solenoid valve 41 that is a hot water on / off valve, a hot water flow rate counter 42, and bath water in the circulation circuit are provided. There are provided a check valve 43 for preventing the backflow through the bath pipe 18 and a backflow water release valve 46 for releasing the backflow water flowing into the hot water open electromagnetic valve 41 and discharging it to the outside. .

  The bathtub outlet pipe 50 that constitutes the circulation circuit together with the bathtub inlet pipe 51 is provided with a water pressure sensor 47, a bath circulation electric valve 48, and a circulation pump 49 in order from the upstream side, that is, the side closer to the bathtub. The connection part of the bathtub outflow pipe 50 and the bathtub inflow pipe 51 is also a joining part with the hot water supply pipe 22, and a circulating hot water supply thermistor 44 is provided in this joining part. The bathtub inflow pipe 51 is provided with a flowing water switch 45, a bath three-way valve 55, and a reheating temperature thermistor 39 in order from the junction to the downstream bathtub. The bathtub inflow pipe 51 is connected to a pipe communicating with the bathtub at the pipe takeout portion 54, and this pipe communicates with the bathtub outflow pipe 50 connected to the pipe takeout portion 53 through the inside of the bathtub.

  The water pressure sensor 47 is a sensor that detects the amount of hot water of the bath water filled in the bathtub, in other words, the water pressure for obtaining the water level in the bathtub. The electric valve 48 for bath circulation is an electromagnetic valve that opens and closes the circulation circuit. The circulating hot water supply thermistor 44 is a water temperature sensor that detects the hot water temperature of the bath water flowing through the bathtub outflow pipe 50.

  The running water switch 45 is a running water sensor that detects the bath water circulating in the circulation circuit when the circulation pump 49 is driven, and the control device determines whether or not the bath water is in the bathtub based on the ON time of the switch. Used. The circulation pump 49 is an electric pump that forcibly circulates the bath water in the bathtub in the circulation circuit.

  The hot water solenoid valve 41, the hot water flow rate counter 42, the check valve 43, the backflow water release valve 46, the circulating hot water supply thermistor 44, and the water flow switch 45 are formed by a module integrated with the piping connecting them. It may be configured. This module is a hot water filled solenoid valve assembly 40, and may be configured as a box-shaped unit component in which the pipe length is made as short as possible to reduce pressure loss and flow path resistance. Moreover, by forming this module with a resin material, it is possible to reduce the weight and improve the workability and maintainability.

  The reheating temperature thermistor 39 is a water temperature sensor that detects the temperature of the bath water flowing through the bathtub inflow pipe 51, and detects the temperature of the bath water that is returned into the bathtub. The water pressure sensor 47, the flowing water switch 45, the circulating hot water supply thermistor 44, and the reheating temperature thermistor 39 output the respective volume information, flowing water information and temperature information to the control device, and the bath circulation motor-operated valve 48 and the circulation pump. 49 is controlled by a control device.

  When detecting the temperature of the bath water in the bathtub after hot water filling, the hot water solenoid valve 41 is closed and the circulation pump 49 is operated. And the temperature of bath water is detected by the hot water supply thermistor 44 for circulation, circulating the bath water in a bathtub in order in the bathtub outflow piping 50, the bathtub inflow piping 51, and a bathtub.

  The control device is mainly composed of a microcomputer, and a ROM or RAM built in as storage means is provided with a preset control program or an updatable control program. The control device includes temperature information from the thermistors 24, 30, 31 to 34, 39, 44, flow information from the flow counters 25, 42 and the running water switch 45, and a kitchen remote control (not shown) and a bath remote control (see FIG. Heat pump unit 1, each mixing valve 4, 5, 17, 23, solenoid valve 41 for hot water filling, switching valve 11, bath three-way valve 55, circulation pump 9, It controls actuators such as the tracking pump 19 and the circulation pump 49.

  Note that the kitchen remote controller and bath remote controller are provided with a power supply operation unit, a hot water supply set temperature operation unit, a hot water operation unit, a hot water set temperature operation unit, a reheating operation unit, a reheating set temperature operation unit, and the like.

  Next, the configuration of the tracking function will be described. The heat pump hot water supply device 60 includes a reheating heat exchanger 57 that reheats hot water in a bath tub by heat exchange. The reheating heat exchanger 57 flows into the reheating heat exchanger 57 so as to communicate with the recirculation heat exchanger 57 and the circulation pipe 10 located upstream of the discharge port 12 of the hot water storage tank 2. A pipe 38 is connected, and a heat exchanger outflow pipe 37 that connects the lower part of the hot water storage tank 2 and the reheating heat exchanger 57 is connected so as to communicate with the heat exchanger inflow pipe 38.

  The heat exchanger inflow pipe 38 and the heat exchanger outflow pipe 37 communicate with each other via a hot water supply water flow path in the reheating heat exchanger 57. The hot water supply water flow path, the heat exchanger outflow pipe 37, and the hot water storage tank 2 are connected to each other. The inside, the circulation pipe 10, and the heat exchanger inflow pipe 38 constitute a reheating circuit for heating the bath water of the bathtub. This reheating circuit is provided with a reheating pump 19 for forcibly circulating hot water supply water in the reheating circuit.

  On the other hand, the bath water flow path in the reheating heat exchanger 57, which is a passage of the bath water heated by exchanging heat with the hot water, is connected to the heat exchanger inflow pipe 20 and the heat exchanger outflow pipe 26. . The heat exchanger inflow pipe 20 is connected to the bath three-way valve 55 so as to communicate with the bathtub inflow pipe 51, thereby connecting the bath water flow path and the inside of the bathtub. The heat exchanger outflow pipe 26 is connected to the bathtub inflow pipe 51 in the downstream portion of the bath three-way valve 55, thereby connecting the bath water flow path and the inside of the bathtub.

  When the bath water replenishment operation is carried out, the control device opens the electric valve 48 for bath circulation, operates the circulation pump 49 provided in the bathtub outflow pipe 50, and further sets the bath three-way valve 55. Control to open the valve to the heat exchanger inflow pipe 20 side is executed, and the bath water circulates between the bath water flow path and the inside of the bathtub. Further, the control device operates the circulation pump 9 and the reheating pump 19 in the recirculation pipe 10 to execute the control to switch the switching valve 11 to the discharge port 12 side of the hot water storage tank 2, and the hot water supply water is a reheating circuit. It will circulate inside.

  At this time, the bath water flows out of the bathtub and flows through the bathtub outflow pipe 50, flows into the heat exchanger inflow pipe 20 by the bath three-way valve 55, and is used for hot water supply in the bath water flow path of the reheating heat exchanger 57. Heat is received from hot water supply water flowing through the water flow path, the water temperature rises, passes through the heat exchanger outflow pipe 26, flows into the bathtub inflow pipe 51, and returns to the bathtub. Then, the control device continues the reheating operation until the temperature of the bath water detected by the circulating hot water supply thermistor 44 reaches a predetermined temperature.

  FIG. 2 is a schematic diagram showing an arrangement configuration of each part of the heat pump hot water supply device 60 in the housing 61. As shown in FIG. 2, the heat pump hot water supply device 60 includes a hot water storage tank unit 64 and a heat pump unit 1. The hot water storage tank unit 64 and the heat pump unit 1 are installed in an integrated state.

  Specifically, the functional parts, piping, and hot water storage tank 2 that have the function of controlling the flow of hot water supply water and communicate with the hot water storage tank 2 or the hot water use side terminal, The hot water storage tank 2 and the heat pump unit 1 are installed in an integrated manner in appearance since they are housed in the housing 61 formed by the above. The casing 61 is a rectangular parallelepiped surrounded by a steel plate and includes a plurality of legs. The outer surface of the hot water storage tank 2 is covered with a heat insulating material 62.

  Inside the housing 61, the heat pump unit 1 including the water / refrigerant heat exchanger 1a is arranged on one side, and the hot water storage tank unit 64 is arranged on the other side corresponding to the side of the heat pump unit 1. . The hot water storage tank unit 64 is mainly composed of the hot water storage tank 2, functional parts, and pipes, and the functional parts are arranged in a position higher than the upper surface of the hot water storage tank 2 in the housing 61. The upper surface of the hot water storage tank 2 is a surface facing upward among the surface portions forming the hot water storage tank 2, for example, a top surface constituting the ceiling portion of the tank.

  Moreover, it is preferable that the functional component is disposed above the top corresponding to the highest portion of the hot water storage tank 2. This is because the heat released upward when the hot water in the uppermost part of the hot water tank flows through the hot water supply pipe 22 stays between the top of the hot water tank 2 and the top surface of the housing. This is because the temperature rises and the functional parts can be further warmed.

  Here, the functional parts are parts arranged on the flow path that has the function of controlling the flow of hot water, and stop the flow of the fluid, change the flow direction, and control the pressure in the pipe. And a driving component (pump) for forcibly moving the fluid and a device for heating the fluid. For example, the functional components include a first mixing valve 4, a second mixing valve 5, a hot water mixing valve 17, a hot water supply mixing valve 23, and other pressure mechanisms 13 having other valve mechanisms. , Relief valve 35, hot water solenoid valve 41, backflow water release valve 46, electric valve 48 for bath circulation, bath three-way valve 55, circulation pump 9 that is a circulation pump, reheating pump 19, bath circulation pump 49, And a reheating heat exchanger 57. Note that a plurality of components may be appropriately selected from these functional components, and the functional component unit 63 that is integrated with a pipe connecting the components into a block shape may be configured.

  By disposing these components above the upper surface or top of the hot water storage tank 2, among the hot water stored in the hot water storage tank 2, heat is dissipated by the hot water at the top, and the hot water in the hot water storage tank 2 is heated. Heat dissipation from the hot water supply pipe 22 through which water flows is transmitted to each functional component. As a result, the water staying in the functional component is warmed, so that freezing of the functional component that occurs when the outside air is at a low temperature can be reduced.

  The tank upper part 56 at the upper part of the housing 61 is provided with a pipe takeout part for connecting a pipe communicating with the hot water supply use side terminal. By placing the pipe take-out part in the tank upper part 56, the pipe take-out part is arranged in a place close to the place where the functional parts are arranged, so that the length of the pipe and the pressure loss of the pipe can be reduced, and further maintenance and pipe assembly Work can be performed collectively on the top of the housing 61. This pipe take-out part is for connecting the hot water supply use side terminal and the pipe of the heat pump hot water supply device 60, and is arranged so as to bundle a plurality of pipe connection ports that need to communicate with the hot water supply use side terminal. ing. The plurality of pipe connection ports are a hot water supply pipe outlet 52 connected to the pipe leading to the hot water faucet, and a bathtub pipe outlet 53, 54 connected to each of the two pipes leading to the bathtub.

  The pipe take-out portion may be arranged in the tank lower portion 56A at the lower portion of the casing 61. In this configuration, the lower portion of the casing 61 where the burden on the operator is light for maintenance and pipe assembly work. Can be done in low places.

  Next, an example of the arrangement of the functional components will be described with reference to FIGS. FIG. 3 is a schematic plan view showing the arrangement of functional components when the hot water storage tank 2 is viewed in plan. FIG. 4 is a view taken in the direction of arrow X in FIG. 3 showing the positional relationship of the functional components in the vertical direction. In FIG. 3, the front side of the drawing is a vertically upward direction, and the back side of the drawing is a vertically downward direction. In FIG. 4, the upper side of the drawing is a vertically upward direction, and the lower side of the drawing is a vertically downward direction.

  As shown in FIG. 3 and FIG. 4, the functional component is disposed at a position higher than the pipe take-out flange 65 that hits the top of the hot water storage tank 2, and when the hot water storage tank 2 is viewed in plan view, It is preferable to be located on the periphery or on the inner side of the outer periphery. In other words, the functional component is preferably arranged so as to be located above the top surface and the top of the hot water storage tank 2, which is a vertically long sealed can, and further from the top to the shoulder.

  Moreover, it is preferable to arrange | position a functional component in the same height position as the hot water supply piping 22 which forms the passage where the high temperature water of the upper part in the hot water storage tank 2 flows out, or a position higher than the hot water supply piping 22 about the vertical direction. This is because the amount of heat released from the hot water supply pipe 22 through which the high-temperature water flows can be reliably transmitted by the functional component.

  The hot water storage tank 2 housed in the housing 61 is covered with a heat insulating material 62, and in particular, the side portion extending in the vertical direction of the hot water storage tank 2 is covered with a foamed heat insulating material 62 c, and a pipe take-out flange 65 is provided. The surroundings of the top surface, the top, and the pipes protruding from the tank are covered with the vacuum heat insulating material 62a in such a manner as to be covered. The vacuum heat insulating material 62a is a heat insulating material in which a core material having a porous structure is covered with a laminate film and then sealed to reduce the inside, and has excellent heat insulating performance and thinness. The core material is made of a foamed material such as urethane, a powder material such as silica, or a fiber material such as glass wool.

  The hot water supply pipe 22 faces the vacuum heat insulating material 62a covering the top of the hot water storage tank 2 in a state where the periphery of the base portion protruding from the hot water storage tank 2 is sealed by the heat seal portion 62b, and extends upward, Extends laterally within the body 61. Similarly, the periphery of the discharge port 12 of the circulation pipe 10 faces the vacuum heat insulating material 62 a while being sealed by the heat seal portion 62 b, extends upward, and then extends sideways in the housing 61.

  The second mixing valve 5 is connected to the hot water supply pipe 22 extending to the side, and the hot water mixing valve 17, the hot water mixing valve 23, and the relief valve 35 are connected to the second mixing valve 5 through the pipe. Furthermore, a pressure reducing valve 13 is connected via a city water pipe 14. The hot water filling mixing valve 17 is a module in which components such as a flow rate counter 42, a hot water filling electromagnetic valve 41, and a backflow water release valve 46 are integrated via a bath pipe 18. Is connected. By forming this module with a resin material, it is possible to reduce the weight and improve the workability and maintainability.

  Above the top, top and shoulders of the hot water storage tank 2 covered with the vacuum heat insulating material 62a, the heat exchanger flows out in addition to the above-mentioned functional components such as the second mixing valve 5 connected to the hot water supply pipe 22. A reheating pump 19 having connection ports 19a and 19b connected to the pipe 37 on the side and a bath circulation pump 49 having connection ports 49a and 49b connected to the bathtub outflow pipe 50 on the upper side are arranged.

  In addition, as shown in FIG. 4, it is preferable to arrange a plurality of mixing valves above the top, top and shoulders of the hot water storage tank 2 and to position these mixing valves at the same height. This is because a plurality of mixing valves can be arranged as a unit, so that the effect of reducing freezing in the hot water supply circuit can be improved and the pressure balance between the mixing valves can be easily maintained.

  In particular, the plurality of mixing valves are preferably a hot water supply mixing valve 23 and a hot water mixing valve 17. This is because it becomes easy to maintain the pressure balance between the hot water supplied to the hot water faucet and the hot water supplied to the bathtub. Moreover, it is preferable to arrange | position the some mixing valve in the form which forms the united module.

  Furthermore, it is preferable to arrange the relief valve 35 at the highest position among the functional components arranged above the top, top, and shoulder of the hot water storage tank 2. On the contrary, it is preferable to arrange the backflow opening valve 46 at the lowest position among the functional parts arranged above the top, top, and shoulder of the hot water storage tank 2.

  Since the entire hot water storage tank 2 is covered with a heat insulating material, heat generated from the high-temperature water in the upper part of the tank is released to the outside from the base of the heat seal portion 62b and the hot water supply pipe 22 where it is difficult to provide the heat insulating material. . The functional component of the present embodiment is arranged at a position where this heat radiation can be received effectively.

  As described above, the heat pump type hot water supply apparatus of the present embodiment includes a configuration in which the functional components are arranged on the outer peripheral edge of the hot water storage tank 2 or on the inner side of the outer peripheral edge when the hot water storage tank 2 is viewed in plan. Yes. According to this configuration, the heat radiation generated from the hot water storage tank 2 or the hot water supply pipe 22 can be reliably given to the functional parts. In addition, since each functional component is arranged so as to gather in the center of the tank in plan view, it becomes easier to receive heat from the piping, and the piping length between functional components, the number of assembling steps of the piping, and the pressure loss of the piping Can be further reduced.

  The functional parts arranged above the hot water storage tank 2 are the pressure reducing valve 13, the relief valve 35, the hot water solenoid valve 41, the backflow water release valve 46, the bath circulation electric valve 48, the bath three-way valve 55, and the reheating valve. The pump 19, the bath circulation pump 49, or the reheating heat exchanger 57 is preferable. In this case, since it is easy to stop water in each functional component during a period of absence, such as during a trip, or before a hot water supply apparatus is installed, the heat from the hot water supply pipe 22 or the hot water storage tank 2 is received. Great anti-freezing effect.

(Second Embodiment)
The piping configuration of the heat pump hot water supply apparatus in the second embodiment will be described with reference to FIG. FIG. 5 is a schematic diagram showing a schematic configuration and a piping configuration of the heat pump type hot water supply apparatus in the present embodiment. As shown in FIG. 5, the heat pump type hot water supply apparatus of the present embodiment has the same configuration as that of the heat pump type hot water supply apparatus (see FIG. 1) of the first embodiment, and the description thereof is as follows. As in the first embodiment. Here, a configuration different from the first embodiment will be described below.

  A city water inflow pipe 15 that communicates with the city water pipe 14 and supplies city water into the hot water storage tank 2 is connected to the introduction port 6. The city water inflow pipe 15 is provided with a tank flow regulating valve 73 at a site upstream from the inlet 6. The tank flow control valve 73 has a function of adjusting the flow rate of city water flowing into the lower part of the hot water storage tank 2. The city water inflow pipe 15 may be provided with a drain valve for draining.

  The circulation pipe 10 that communicates between the suction port 8 provided on the bottom surface of the hot water storage tank 2 and the water / refrigerant heat exchanger 1a is supplied to the heat pump replenishment three-way valve 72 and the water / refrigerant heat exchanger 1a. An inlet temperature thermistor 31 for detecting the temperature of the water to be supplied, a check valve 28, and a circulation pump 9 for forcibly flowing the water in the circulation pipe 10 are provided. A can body protection valve that operates at a predetermined pressure value may be provided upstream of the check valve 28.

  The heat pump tracking three-way valve 72 is a three-way valve provided at a junction between a heat exchanger outflow pipe 71 and a circulation pipe 10 described later. The heat pump reheating three-way valve 72 has flowed through the heat exchanger outlet pipe 71 by flowing the water in the lower part of the hot water storage tank 2 into the circulation pipe 10 or flowing out the heat exchanger 57 for reheating. It is possible to switch whether water is introduced or not, and it is controlled by a control device.

  A heat pump flow control valve 74 is provided downstream of the check valve 29 in the water supply pipe 16 provided to communicate the city water pipe 14 and the circulation pipe 10. The heat pump flow control valve 74 is a flow rate adjusting means that can adjust the flow rate of city water to be merged into the circulation pipe 10.

  A circulation pipe 10 downstream of the switching valve 11 is provided with a thermostat 75. The thermostat 75 is a switch for preventing overheating of the hot water storage tank 2. For example, the signal is output to the control device.

  A hot water temperature thermistor 76 is provided in the bath pipe 18 downstream of the hot water mixing valve 17, and a signal from the hot water temperature thermistor 76 is output to the control device to Used for control.

  The heat exchanger inflow pipe 20 is connected to the junction between the bathtub outflow pipe 50 and the bathtub inflow pipe 51 and the junction with the hot water supply pipe 22. In the bathtub inflow pipe 51 from the junction to the bathtub, a flowing water switch 45, a circulating hot water supply thermistor 44, a reheating three-way valve 77, and a reheating temperature thermistor 39 are provided in this order.

  The hot water solenoid valve 41, the hot water flow rate counter 42, the check valve 43, and the backflow water release valve 46 may be configured by an integrated module together with piping connecting them. This module is a hot water filled solenoid valve assembly 40A, and may be configured as a box-shaped unit component in which the pipe length is shortened as much as possible to reduce pressure loss and flow path resistance. Moreover, by forming this module with a resin material, it is possible to reduce the weight and improve the workability and maintainability.

  Next, the configuration of the tracking function will be described. The reheating heat exchanger 57 is in communication with the reheating heat exchanger 57 and a hot water supply line 22 located downstream of the outlet 7 provided at the top of the hot water storage tank 2. A heat exchanger inflow pipe 70 is connected. Further, the heat exchanger inflow pipe 70 includes a circulation pipe 10 and a reheating heat exchanger 57 formed between the time when water in the lower part of the hot water storage tank 2 flows out and reaches the water / refrigerant heat exchanger 1a. Are connected to each other through a hot water supply water flow path in the heat exchanger 57 for reheating.

  The hot water supply water flow path, the heat exchanger outflow pipe 71, the circulation pipe 10, the inside of the hot water storage tank 2, and the heat exchanger inflow pipe 70 constitute a reheating circuit for heating the bath water of the bathtub.

  On the other hand, the bath water flow path in the reheating heat exchanger 57, which is a passage of the bath water heated by exchanging heat with the hot water, is connected to the heat exchanger inflow pipe 20 and the heat exchanger outflow pipe 26. . The heat exchanger inflow piping 20 is connected to the connecting portion of the bathtub inflow piping 51, the bathtub outflow piping 50, and the hot water supply piping 22, thereby connecting the bath water flow path and the inside of the bathtub. The heat exchanger outflow pipe 26 is connected to the reheating three-way valve 77 so as to form a T-shaped path with the bathtub inflow pipe 51, thereby connecting the bath water flow path and the inside of the bathtub.

  When the bath water replenishment operation is carried out, the control device opens the electric valve 48 for bath circulation, operates the circulation pump 49 provided in the bathtub outflow pipe 50, and further, the heat exchanger outflow pipe. 26 and the bathtub inflow piping 51 are controlled to communicate with each other, and the three-way valve 77 for chasing is controlled so that the bath water circulates between the bath water flow path and the inside of the bathtub. Further, the control device operates the circulation pump 9 in the circulation pipe 10 to execute the control for switching the switching valve 11 to the discharge port 12 side of the hot water storage tank 2 so that the hot water supply water circulates in the reheating circuit. .

  At this time, the bath water flows out of the bathtub and flows in the bathtub outflow pipe 50, flows into the heat exchanger inflow pipe 20 by the follow-up three-way valve 77, and in the bath water flow path of the follow-up heat exchanger 57, The water temperature rises by receiving heat from the hot water flow through the hot water flow path, passes through the heat exchanger outflow pipe 26, flows into the bathtub inflow pipe 51, and returns to the bathtub. Then, the control device continues the chasing operation until the temperature of the bath water detected by the chasing temperature thermistor 39 reaches a predetermined temperature.

  As functional parts in this embodiment, it is a part disposed on the flow path having the function of controlling the flow of city water or hot water supply water, stop the flow of fluid, change the flow direction, It is a valve for controlling the pressure, a driving component (pump) for forcibly moving the fluid, and a device for heating the fluid. For example, in addition to the functional components described in the first embodiment, the functional components include a reflow three-way valve 77 having a valve mechanism for switching the flow direction and adjusting the flow rate, a heat pump reflow three-way valve 72, a tank flow They are the valve control 73, the heat pump flow control valve 74, the switching valve 11, and the like.

  Note that a plurality of components may be appropriately selected from these functional components, and the functional component unit 63 that is integrated with a pipe connecting the components into a block shape may be configured. Moreover, the functional component in this embodiment is provided in the same arrangement | positioning location as the functional component in 1st Embodiment, The effect is also the same.

(Third embodiment)
The arrangement configuration of each part of the heat pump hot water supply apparatus in the third embodiment will be described with reference to FIG. FIG. 6 is a schematic diagram showing an arrangement configuration of each part of the heat pump type hot water supply apparatus in the present embodiment. As shown in FIG. 6, the heat pump type hot water supply apparatus is configured as a separate body in which the heat pump unit 1 and the hot water storage tank unit 64 are not integrated with respect to the heat pump type hot water supply apparatus of the first embodiment. The only difference is that

  The hot water storage tank unit 64 and the heat pump unit 1 are housed in separate casings 61 and 65, respectively, and are installed at a predetermined distance from each other.

  The tank upper part 56 at the upper part of the housing 61 is provided with a pipe takeout part for connecting a pipe communicating with the hot water supply use side terminal. This pipe take-out part is for connecting the hot water supply use side terminal and the pipe of the heat pump hot water supply device 60, and is arranged so as to bundle a plurality of pipe connection ports that need to communicate with the hot water supply use side terminal. ing. The plurality of pipe connection ports are two pipe connection ports connected to the heat pump unit 1 in addition to the hot water supply pipe extraction unit 52 and the bathtub pipe extraction units 53 and 54 described above.

  The upper part 58 of the housing 65 is provided with a pipe outlet for connecting the pipe of the hot water storage tank unit 64. This pipe take-out portion is two pipe connection ports connected to the hot water storage tank unit 64. Note that the pipe take-out portion may be arranged in the lower portion 58A of the housing 65.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, the working refrigerant flowing through the heat pump cycle of the heat pump unit 1 is not limited to carbon dioxide, and may be other refrigerants such as Freon.

  Moreover, although the heat pump unit 1 of the said embodiment is based on the supercritical heat pump cycle from which the pressure of a refrigerant | coolant becomes more than a critical pressure, it is not limited to this, The pressure of a refrigerant | coolant is based on the heat pump cycle below a critical pressure. Good thing.

It is the piping figure which showed the heat pump type hot-water supply apparatus and piping structure in 1st and 3rd embodiment of this invention. It is the schematic diagram which showed the arrangement configuration of each part of the heat pump type hot water supply apparatus in 1st, 2nd and 3rd embodiment. It is the schematic top view which showed arrangement | positioning of the functional component arrange | positioned above the hot water storage tank in the heat pump type hot water supply apparatus of 1st, 2nd and 3rd embodiment. FIG. 4 is a schematic side view showing the arrangement of functional components when viewed from the X direction in FIG. 3. It is the piping figure which showed the piping structure of the heat pump type hot water supply apparatus in 2nd and 3rd embodiment of this invention. It is the schematic diagram which showed the arrangement structure of each part of the heat pump type hot-water supply apparatus in 3rd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Heat pump unit, 2 ... Hot water storage tank, 4 ... 1st mixing valve (functional component, mixing valve), 5 ... 2nd mixing valve (functional component, mixing valve), 13 ... Pressure-reducing valve (functional component), 14 ... City Water piping, 17 ... Hot water filling mixing valve (functional parts, mixing valve), 18 ... Bath piping (flow path), 19 ... Reheating pump (functional parts, circulation pump), 22 ... Hot water supply piping, 23 ... Hot water supply Mixing valve (functional part, mixing valve), 35 ... relief valve (functional part), 37 ... heat exchanger outflow pipe, 40 ... solenoid valve for hot water filling (functional part), 41 ... electromagnetic valve for hot water filling (function) Parts, hot water on / off valve), 46 ... backflow water release valve (functional parts), 49 ... bath circulation pump (functional parts, circulation pump), 50 ... bathtub outflow pipe, 52 ... hot water supply pipe outlet (pipe outlet) ), 53, 54 ... Tubing piping outlet (piping outlet), 56 ... Click upper portion (upper), 56A ... tank lower part (bottom), 57 ... reheating heat exchanger (functional part), 61 ... housing, 62 ... heat insulating material, 65 ... housing

Claims (17)

A heat pump unit (1) for boiling water for hot water supply by exchanging heat with a high-temperature and high-pressure refrigerant;
A hot water storage tank (2) for storing hot water for heating heated by the heat pump unit (1);
A hot water supply use terminal from which hot water supplied by the heat pump unit (1) is discharged directly or via the hot water storage tank (2);
Functional parts (4, 5, 13, 17, 19, 23, 35, 40 provided to control the flow of hot water supply water and communicate with the hot water storage tank (2) or the hot water use side terminal 41, 46, 49, 57),
A hot water on / off valve (41) that opens and closes a flow path (18) of hot water supplied to the bathtub that is the hot water use side terminal,
The functional parts (4, 5, 13, 17, 19, 23, 35, 40, 41, 46, 49, 57) are arranged at a position higher than the upper surface of the hot water storage tank (2) , and further the hot water storage When the tank (2) is viewed in plan, it is located on the outer peripheral edge of the hot water storage tank (2) or inside the outer peripheral edge,
The heat pump hot water supply apparatus according to claim 1, wherein the functional component includes a backflow water release valve (46) for releasing backflow water flowing into the hot water on / off valve (41).   The said backflow water release valve (46) is arrange | positioned in the lowest position among the said functional components arrange | positioned above the top | upper surface of the said hot water storage tank (2). The heat pump type hot water supply apparatus described. The heat pump type hot water supply apparatus according to claim 1 or 2 , wherein the functional component is disposed above a top of the hot water storage tank (2). A hot water storage tank (2) and a housing (61) for storing the functional parts;
The heat pump type according to any one of claims 1 to 3 , wherein the functional component is disposed in the casing (61) at a position higher than the top of the hot water storage tank (2). Hot water supply device. The position of the functional component is the same height as the hot water supply pipe (22) through which the hot water supply water stored in the hot water storage tank (2) flows out or above the hot water supply pipe (22). The heat pump type hot water supply apparatus according to any one of claims 1 to 4 . A heat insulating material (62) for reducing heat dissipation is provided in the hot water storage tank (2),
The heat pump type hot water supply apparatus according to claim 5 , wherein the hot water supply pipe (22) faces the heat insulating material (62). The heat pump type hot water supply apparatus according to any one of claims 1 to 6 , wherein the functional component includes a mixing valve (4, 5, 17, 23). A plurality of the mixing valves (4, 5, 17, 23) are provided, and the plurality of mixing valves are arranged at the same height above the top surface of the hot water storage tank (2). The heat pump type hot water supply apparatus according to claim 7 . The plurality of mixing valves are provided with a hot water mixing valve (17) for adjusting the temperature of hot water supply to the bathtub, which is the hot water use side terminal, and hot water supply water to the hot water tap, which is the hot water use side terminal. The heat pump type hot water supply device according to claim 8 , which is a hot water supply mixing valve (23) to be adjusted. The heat pump hot water supply device according to any one of claims 1 to 9 , wherein the functional component includes a pressure reducing valve (13) provided in a city water pipe (14) for taking in city water. The functional part includes a relief valve (35) for lowering the pressure in the hot water storage tank (2), and the relief valve (35) is disposed above the top surface of the hot water storage tank (2). The heat pump hot water supply device according to any one of claims 1 to 10 , wherein the heat pump hot water supply device is arranged at a highest position among the functional parts. The heat pump type hot water supply device according to any one of claims 1 to 11 , wherein the functional component includes a circulation pump (19, 49). The heat pump type hot water supply apparatus according to any one of claims 1 to 12 , wherein the functional component includes a reheating heat exchanger (57) for reheating the bath water in the bathtub. The heat pump unit (1) and the hot water storage tank (2) are housed in a housing (61) and are integrated and installed on the exterior.
The pipe take-out portion for connecting a pipe communicating with the hot water used terminal (52, 53, 54) the upper (56) from claim 1, characterized in that arranged in 13 of the housing (61) The heat pump type hot water supply apparatus according to any one of the above. The heat pump unit (1) and the hot water storage tank (2) are housed in a housing (61) and are integrated and installed on the exterior.
The pipe take-out portion for connecting a pipe communicating with the hot water used terminal (52, 53, 54) of the housing lower claim 1, characterized in that arranged in (56A) 13 of the (61) The heat pump type hot water supply apparatus according to any one of the above. Each of the heat pump unit (1) and the hot water storage tank (2) is provided in a separate housing (61, 65),
A pipe take-out portion (52, 53, 54) for connecting a plurality of pipes communicating with the hot water supply side terminal and the heat pump unit (1), and a housing (61) in which the hot water storage tank (2) is housed. The heat pump type hot water supply apparatus according to any one of claims 1 to 13 , wherein the heat pump type hot water supply apparatus is disposed in an upper part (56) of the heat pump. Each of the heat pump unit (1) and the hot water storage tank (2) is provided in a separate housing (61, 65),
A pipe take-out portion (52, 53, 54) for connecting a plurality of pipes communicating with the hot water supply side terminal and the heat pump unit (1), and a housing (61) in which the hot water storage tank (2) is housed. The heat pump hot water supply device according to any one of claims 1 to 13 , wherein the heat pump hot water supply device is disposed in a lower portion (56A) of the heat pump.

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