JP2008304088A - Heat pump-type hot water storage water heating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump-type hot water storage water heating system capable of securing a drainage space and piping workability, and reducing a height of a device as a whole while securing a capacity of a heat pump unit. <P>SOLUTION: This heat pump-type hot water storage water heating system 110 comprises the heat pump unit 100, a tank unit for storing the water for hot water supply, heated by the heat pump unit 100, a heat pump-side housing portion 111 storing the heat pump unit 100, a tank-side housing portion 112 storing the tank unit, a heat pump-side leg portion 113 supporting the heat pump-side housing portion 111, and a tank-side leg portion 114 supporting the tank-side housing portion 112. The tank-side base portion 117 is disposed on a position higher than the heat pump-side base portion 115, and a distance between an installation face 200 of the tank-side leg portion 114 and the tank-side base portion 117 is longer than a distance between the installation face 200 of the heat pump-side leg portion 113 and the heat pump-side base portion 115. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an integrated heat pump hot water storage hot water apparatus in which a heat pump unit and a hot water storage tank are housed in a housing.

  As a conventional heat pump hot water storage hot water device, a refrigerant cycle in which components such as a compressor and a heat exchanger are connected in an annular shape, and a tank circuit that stores the heated hot water and supplies it as hot water supply water in a single casing. A device that is housed and configured integrally is known (for example, see Patent Document 1).

In the heat pump type hot water storage hot water apparatus, a second substrate having a smaller area than the first substrate is provided on a first substrate on which a compressor and a tank are disposed, and the first substrate is disposed on the first substrate and below the second substrate. A water-refrigerant heat exchanger is provided, and an air-refrigerant heat exchanger is provided on the second substrate. Therefore, this configuration enables independent storage of the water-refrigerant heat exchanger, reduces the size of the main body, and improves the maintainability of the water-refrigerant heat exchanger, such as improved storage and replacement.
JP 2005-172384 A

  In the above conventional heat pump hot water storage hot water device, in order to reduce the height of the housing that integrally houses the refrigerant cycle and the tank circuit, it is necessary to shorten the legs that support the housing by floating from the installation surface such as the foundation. There is. However, if this leg is shortened, the distance between the housing and the installation surface will be shortened and sufficient drainage space will not be obtained, so it is necessary to bury drainage grooves and drain traps in the foundation where the legs are installed. is there. For this reason, there exists a problem that the freedom degree on housing | casing installation and the construction property of piping fall remarkably.

  Conversely, if the legs are lengthened, the drainage space between the housing and the installation surface will increase, and the workability of the piping will improve, but the overall height of the device will increase, and the installation of the device will increase. There is a problem that the space is enlarged and the user is given a feeling of pressure.

  Accordingly, an object of the present invention has been made in view of the above problems, and while ensuring drainage space and piping workability, a heat pump hot water storage system that secures the capacity of the heat pump unit and suppresses the height of the entire apparatus. It is to provide a hot water device.

In order to achieve the above object, the following technical means are adopted. That is, the first invention according to the heat pump hot water storage hot water device is a heat pump unit (100) that heat-exchanges high-temperature and high-pressure refrigerant to boil hot water, and a tank that stores hot water heated by the heat pump unit (100). A tank unit having (2), a heat pump side housing (111, 111A) in which the heat pump unit (100) is housed, a tank side housing (112, 112A) in which the tank unit is housed, and the heat pump side A heat pump side leg (113) that supports the casing (111, 111A) and a tank side leg (114) that supports the tank side casing (112, 112A),
The heat pump side casing (111, 111A) and the tank side casing (112, 112A) constitute one casing.
The tank side base part (117, 117A) which is the bottom part of the tank side housing part (112, 112A) is more than the heat pump side base part (115, 115A) which is the bottom part of the heat pump side housing part (111, 111A). Placed at a high position,
The distance between the installation surface (200) on which the tank side leg (114) is installed and the tank side base (117, 117A) is the same as the installation surface (200) on which the heat pump side leg (113) is installed and the heat pump side. It is characterized by being longer than the distance to the base portion (115, 115A).

  According to this invention, in addition to ensuring drainage space and piping workability, it is possible to provide a heat pump hot water storage hot water apparatus that secures the capacity of the heat pump unit and suppresses the height of the entire apparatus.

  The heat pump unit (100) has a water-refrigerant heat exchanger (1), and the tank side base portion (117, 117A) and the heat pump side base portion (115, 115A) are integrated by a connecting portion (116, 116A). It is preferable that the connection part (116, 116A) is supporting the lower end part (1c) of the water-refrigerant heat exchanger (1).

  According to this invention, the movement and position shift of the water-refrigerant heat exchanger downward in the vertical direction are suppressed, and the heat exchanger can be stably installed. Further, the fixing structure on the lower end side of the water-refrigerant heat exchanger can be simplified, and the number of parts for installation can be reduced.

  In addition, a pipe connection part (119) for connecting a pipe connected to a hot water supply use side terminal where hot water supplied by the heat pump unit (100) is discharged and a pipe connected to the tank (2) is provided. It is preferable that the connecting portion (119) is provided near the side surface of the tank side housing portion (112).

  According to this invention, maintenance and piping assembly work can be performed collectively from the side of the housing, and workability is improved.

  In addition, a pipe connection part (119) for connecting a pipe connected to the hot water use side terminal from which hot water supplied by the heat pump unit (100) is discharged and a pipe connected to the tank (2) is provided, It is preferable that the connecting portion (119) is provided near the top surface of the tank side housing portion (112).

  According to the present invention, since the pipe connecting portion is disposed near the tank, the length of the pipe and the pressure loss of the pipe can be reduced, and further, maintenance and pipe assembling work can be performed collectively on the upper part of the casing. .

The heat pump unit (100) includes an evaporator (103) and a blower (107) that forms air passing through the evaporator (103).
The heat pump side casing (111A) includes the air suction port on one of the front surface and the back surface and the air outlet on the other side, and the width in the depth direction is the tank side casing (112A). Shorter than). According to the present invention, when the device is installed in a narrow place in the depth direction, a blowout space can be secured around the blowout port formed in the heat pump-side casing, so that the blown air is on the suction port side. It is possible to prevent a short circuit that goes around.

  In addition, the code | symbol in the 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 hot water storage hot water device 110 and the arrangement of each part in the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram showing a heat pump hot water storage hot water device 110 and a piping configuration in the present embodiment.

  The heat pump type hot water storage hot water apparatus 110 of this embodiment is a hot water storage type heat pump type hot water supply apparatus, which is mainly used for general household use, hot water for hot water stored in the tank 2, and a heat pump unit. The hot water boiled at 100 is supplied to a hot water use side terminal for a kitchen, a washroom, a bathroom, 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, a heat pump hot water storage hot water apparatus includes a heat pump unit 100 that heats water with a high-temperature / high-pressure refrigerant in a water-refrigerant heat exchanger 1 and a water flow path of the water-refrigerant heat exchanger 1. The tank 2 which stores the hot water heated by 1a, and the control apparatus 106 which is a control means which controls the action | operation of this hot water apparatus are provided.

  The heat pump hot water storage hot water apparatus 110 is configured so that water in the tank 2 returns to the high temperature water section in the upper part of the tank 2 through the water flow path 1a of the water-refrigerant heat exchanger 1 as a main pipe through which hot water is supplied. A circulation pipe 10 for connecting the tank 2 and the water-refrigerant heat exchanger 1, a hot water supply pipe 22 through which the hot water in the high-temperature water section in the tank 2 flows out to the hot water supply side, and a water-refrigerant heat exchanger Direct hot water supply piping 3 that connects the circulation pipe 10 and hot water supply piping 22 until the hot water heated in one water flow path 1 a reaches the tank 2, and intermediate hot water section in the tank 2 and direct hot water supply piping 3 Medium-temperature water piping 36.

  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 a 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 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 tank 2 is a container for storing hot water for hot water supply, and is made of a metal excellent in corrosion resistance, for example, stainless steel, and has a heat insulating material provided on the outer periphery thereof to keep hot water for hot water supply for a long time. can do. The tank 2 has a vertically long shape, and an introduction port 6 is provided on the bottom surface thereof. The tank 2 of the present embodiment is a small tank having a capacity capable of satisfying an average hot water supply amount (43 ° C., 430 L) of a general household of 3 to 4 people.

  The tank 2 is provided with a water temperature thermistor 30 including four thermistors arranged in the height direction in order to detect the amount of hot water stored in the tank 2 and the hot water storage temperature. The temperature information of the hot water or water filled in the tank 2 at each water level is output to the control device 106. Therefore, based on the temperature information from the water temperature thermistor 30, the control device 106 can detect the boundary position between the hot water heated in the upper part of the tank 2 and the water before heated in the lower part of the tank 2. The amount of stored hot water can be detected.

  A city water inflow pipe 15 for supplying city water into the tank 2 is connected to the introduction port 6. The city water pipe 14 connected to the city water inflow pipe 15 is provided with a pressure reducing valve 13 for adjusting the water pressure of the introduced tap water to be a predetermined pressure and preventing the back flow of hot water in the case of water interruption. Yes. 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 tank 2 is provided with a suction port 8 for sucking water at the bottom of the tank, and the top of the tank 2 is provided with a discharge port 12 for discharging hot water at the top of the tank. 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 1 interposed therebetween. A part of the circulation pipe 10 constitutes a water flow path 1 a of the water-refrigerant heat exchanger 1.

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

  Further, a boiling temperature thermistor 32 that detects the temperature of the water heated by the water-refrigerant heat exchanger 1 is provided at the outlet of the water flow path 1 a of the water-refrigerant heat exchanger 1. The temperature information detected by any of the thermistors is output to the control device 106. A check valve 29 is provided in the water supply pipe 16 for taking in city water.

  The heat pump unit 100 has a heat pump cycle that uses carbon dioxide having a low critical temperature as a refrigerant, and includes at least a compressor 101, a water-refrigerant heat exchanger 1 as a radiator, a variable pressure reducer 102, and an evaporator 103. The gas-liquid separator 105 is connected so as to constitute a closed circuit. Further, an evaporator temperature thermistor 104 that detects the temperature on the downstream side of the evaporator is provided on the downstream side of the evaporator 103. The control device 106 receives detection information from the evaporator temperature thermistor 104 and controls the operation of the variable pressure reducer 102 and the compressor 101.

  The heat pump unit 100 performs heat exchange between the high-temperature and high-pressure refrigerant that flows through the refrigerant flow path 1b of the water-refrigerant heat exchanger 1 and the water that flows through the water flow path 1a of the water-refrigerant heat exchanger 1. Hot water can be boiled. Moreover, the heat pump unit 100 may be configured by an 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 tank 2. The heat pump cycle mainly uses boiling water supply operation to boil the hot water in the tank 2 when the hot water stored in the tank 2 is insufficient or using late-night power in the midnight time zone where the price setting is inexpensive. Do.

  The water channel outlet of the water-refrigerant heat exchanger 1 and the discharge port 12 of the tank 2 are connected by a hot water return pipe 10a. The hot water return pipe 10a is a pipe that forms part of the circulation pipe 10 through which the hot water heated by the water-refrigerant heat exchanger 1 flows, and the hot water discharge pipe 3 is directly connected to the hot water return pipe 10a. A switching valve 11 is provided at the junction between the direct hot water supply pipe 3 and the hot water return pipe 10a circulation pipe 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 1 directly to the hot water supply pipe 3 side or the 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 tank 2, and a hot-water supply pipe 22 for connecting high-temperature water out of hot water for hot-water supply stored in the tank 2 is connected to the lead-out port 7. Further, a discharge pipe provided with a relief valve 35 is connected in the course of the hot water supply pipe 22, and when the pressure in the tank 2 rises above a predetermined pressure, the hot water in the tank 2 is discharged to the outside. It is configured so as not to discharge and damage the tank 2 or the like.

  The intermediate hot water portion, which is an almost intermediate portion in the tank 2, communicates with the intermediate hot water pipe 36 for deriving the intermediate hot water out of the hot water stored in the 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. Whether the first mixing valve 4 flows the hot water flowing directly through the hot water supply pipe 3 to the hot water supply pipe 22 side or to the intermediate hot water portion side in the tank 2 in conjunction with the closing of the second mixing valve 5 described later. Can be controlled.

  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 the control device 106 and 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.

  Thus, the 1st mixing valve 4 and the 2nd mixing valve 5 flow the warm water which flowed directly through the hot-water supply piping 3 via the water-refrigerant heat exchanger 1 to the middle hot water part side in the tank 2 or the hot-water supply piping 22 side. It functions as a switching means.

  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 supply mixing valve 23 and the hot water filling mixing valve 17 are electrically connected to the control device 106, and temperature information detected by the hot water supply thermistor 34, the hot water temperature thermistor 33, the hot water supply thermistor 24, and the circulating hot water supply 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 106, respectively.

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

  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, respectively, a hot water faucet at the end of each pipe, a shower, or a hot water supply to be described later This is a state in which the 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.

  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.

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

  A water pressure sensor 47, an electric valve 48 for bath circulation, and a circulation pump 49 are provided in order from the upstream side, that is, the side close to the bathtub, in the bathtub outflow pipe 50 that constitutes a circulation circuit together with the bathtub inflow pipe 51. 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 water flow switch 45, a bath three-way valve 55, and a bathtub inflow temperature thermistor 39 in order from the junction to the downstream 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.

  Further, 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 constituted by a module integrated with the piping connecting them. May be. This module is an assembly of each hot water supply functional component, and can 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. This module is arranged above the top surface of the tank 2 and radially outward of the side surface of the tank 2. Moreover, this module can be comprised by forming each hot-water supply functional component, piping, etc. with a resin material, can be reduced in weight and can improve workability and maintainability.

  Here, the hot water supply functional component is a component disposed on the flow path having the function of controlling the flow of hot water supply water, and stops the flow of the fluid, changes the flow direction, and controls the pressure in the pipe. Or a drive component (pump) for forcibly moving the fluid, or a device for heating the fluid.

  For example, the hot water supply functional component includes a first mixing valve 4, a second mixing valve 5, a hot water mixing valve 17, a hot water mixing valve 23, and other pressure mechanisms that are water mixing valves. 13. Relief valve 35, hot water solenoid valve 41, backflow water release valve 46, bath circulation electric valve 48, bath three-way valve 55, circulation pump 9 which is a circulation pump, bath circulation pump 49, and heat for reheating Such as an exchange.

  Further, the module of the hot water supply functional component includes a hot water supply functional component unit 118 formed in a block shape by integrating a plurality of components appropriately selected from various hot water supply functional components with piping connecting the components. It is good also as (refer FIG. 2).

  The bathtub inflow temperature thermistor 39 is a water temperature sensor that detects the temperature of hot water flowing through the bathtub inflow piping 51 and flowing into the bathtub. Further, the water pressure sensor 47, the flowing water switch 45, the circulating hot water supply thermistor 44 and the bathtub inflow temperature thermistor 39 output the volume information, flowing water information and temperature information to the control device 106, and the bath circulation motor operated valve 48 and the circulation pump. 49 is controlled by the control device 106.

  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 106 is mainly composed of a microcomputer, and a ROM or RAM incorporated as a storage means is provided with a preset control program or an updatable control program. The control device 106 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, a kitchen remote controller (not shown), and a bath remote controller (not shown). Based on an operation signal from an operation switch (not shown), the heat pump unit 100, each mixing valve 4, 5, 17, 23, a hot water solenoid valve 41, a switching valve 11, a bath three-way valve 55, a circulation pump 9 And actuators such as the circulation pump 49 are controlled.

  In addition, the kitchen remote controller and the 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, and the like.

  Moreover, the heat pump hot water storage / hot water device 110 may be configured to include a reheating heat exchanger for reheating the hot water in the bath tub by heat exchange. When performing this reheating operation, the controller 106 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 shown so that the arrangement of the components constituting the heat pump hot water storage hot water apparatus 110 in the housing can be understood. As shown in FIG. 2, the heat pump hot water storage / hot water device 110 includes a tank unit and a heat pump unit. Both units are housed in a housing and are installed in an integrated appearance. This housing may be configured by integrally joining the housings that store the respective units, or is formed of the heat pump side housing portion 111 and the tank side housing portion 112 as in the present embodiment. You may comprise with one box.

  The heat pump hot water storage hot water apparatus 110 is an apparatus installed outside a house eaves or a veranda of an apartment house, for example, like an outdoor unit of a home air conditioner. And when this kind of apparatus is installed in a confined area such as under a house eaves or on a veranda, it is arranged in such a direction that the depth direction becomes thinner.

  The tank unit is mainly composed of a hot water supply functional part having a function of controlling the flow of hot water for water supply, connecting the inside of the tank 2 and a hot water use side terminal or a bathtub, and a tank formed of a steel plate. It is stored inside the side housing part 112.

  The tank side housing part 112 is a housing part constituting the outer shell on the tank side of the heat pump hot water storage hot water device 110, and is surrounded by the top surface, the side surface, the back surface, the front surface and the tank side base portion 117, and the heat pump side is opened. It is a container that has been. The tank-side housing part 112 includes a tank-side leg part 114 that extends downward from the tank-side base part 117 as a bottom part in the vertical direction. The tank side legs 114 are fixed to the installation base 200 with anchor bolts or the like.

  The heat pump unit 100 is housed in a heat pump side casing 111 formed of a steel plate. Inside the heat pump side casing 111, an evaporator 103 that covers the entire back side is provided, and on the front side of the evaporator 103, two blowers 107 that blow air to the evaporator 103 are provided side by side, The compressor 101 is provided in the lower part, and the water-refrigerant heat exchanger 1 is provided so as to cover the entire tank side. The ventilation direction by the blower 107 is a direction from the front of FIG. 2 toward the depth.

  The heat pump side casing 111 is a casing constituting the outer shell on the heat pump unit side of the heat pump hot water storage hot water device 110, and is surrounded by the top surface, the side, the back, the front, and the heat pump side base 115, and the tank side is An open container. The heat pump side housing part 111 is provided with a heat pump side leg part 113 that extends downward from the heat pump side base part 115 that is the bottom part in the lower part. The heat pump side leg 113 is fixed to the foundation 200 with an anchor bolt or the like, similarly to the tank side leg 114. Thus, the foundation 200 is an installation surface to which the heat pump side leg 113 and the tank side leg 114 are fixed.

  The heat pump side base part 115 is located closer to the base 200 than the tank side base part 117, that is, below the base side. Accordingly, the heat pump side leg part 113 has a vertical length longer than that of the tank side leg part 114. It is getting shorter.

  With this configuration, the size in the height direction of the heat pump side casing 111 is larger than that of the tank side casing 112, and the heat transfer area of the evaporator 103 can be formed larger, so that the capability of the heat pump unit can be ensured. . In addition, since a drainage space can be secured below the tank side base portion 117, the work efficiency of piping construction is improved, and the space occupied by the device is reduced by reducing the overall height of the device to provide a device that does not give the user a feeling of pressure. it can. Further, the tank 2 has a small size in the height direction, so that the size of the tank 2 is reduced and the center of gravity is lowered and stabilized. Accordingly, the size of the foundation 200 is reduced, so that the weight is reduced, the cost for installation can be reduced, and the workability is improved.

  The heat pump side base part 115 and the tank side base part 117 are integrated by a connecting part 116 that connects the two. The connecting part 116 has a shape in which both base parts 115 and 117 are connected over the whole. Therefore, the entire lower surface of the casing constituting the outer shell of the heat pump hot water storage / hot water device 110 is formed by both the base portions 115 and 117 and the connecting portion 116.

  The connecting portion 116 may be formed of a swash plate that connects the base portions 115 and 117 in a straight line. Further, the connecting portion 116 may be formed in a shape in which two swash plates extending from both the base portions 115 and 117 are connected by a horizontal portion in the middle. Moreover, the connection part 116 may be formed so that it may have a curved part in the middle, or may be formed by a stepped step part. In any shape, two base portions having different vertical heights are integrally connected so as to become one base portion, thereby contributing to improvement of the strength of the base portion, and the heat pump unit and the tank unit are mounted. It constitutes a solid foundation part.

  As shown in FIG. 2, the connection part 116 is supporting the lower end part 1c of a water-refrigerant heat exchanger, suppresses the movement and position shift of the water-refrigerant heat exchanger 1 downward in the vertical direction, This contributes to stable installation of the exchanger. In addition, this support structure can simplify the fixing structure on the lower end side of the water-refrigerant heat exchanger, and can reduce the number of screw fastenings for installation.

  The heat pump side leg portion 113 preferably has a vertical length such that the distance from the surface of the foundation 200 to the heat pump side base portion 115 is at least 50 mm or more, for example. Moreover, it is preferable that the tank side leg part 114 is provided with the vertical direction length that the distance from the surface of the foundation 200 to the tank side base part 117 has at least 150 mm or more. Further, the difference in height between the heat pump base 115 and the tank base 117 is preferably 100 mm or more.

  Within the tank-side casing 112, the hot water supply functional component unit 118 extends from a position higher than the upper surface 2a of the tank 2 along the side of the casing inside the tank-side casing 112 (side on the side opposite to the heat pump unit). It extends to the lower part of the body. The upper surface 2a of the tank 2 is a surface facing upward among the surface portions forming the tank 2, and constitutes, for example, a top surface that constitutes a ceiling portion of the tank.

  With this configuration, when the high-temperature water at the top of the tank flows through the hot water supply pipe 22, the heat released upward is retained between the top of the tank 2 and the top surface of the casing. The hot water supply functional parts can be further warmed to prevent freezing. Furthermore, the maintenance work can be performed by removing the steel plate that forms the side surface of the housing (the side surface on the side opposite to the heat pump unit), thereby improving workability.

  A pipe connection part 119 for connecting the hot water supply functional part unit 118 and a pipe communicating with the hot water supply use side terminal near the side face (side face on the side opposite to the heat pump unit) of the inside of the tank side case part 112. Are provided. The pipe connection part 119 connects, for example, a water supply pipe, a bath pipe, an electric lead-in pipe, and the like.

  As shown in FIG. 3, the plurality of pipe connection portions 119 are fixed to the inner wall surface of the tank side housing portion 112 and fixed to the support member 121 that bridges the back side and the front side of the tank side housing portion 112. Has been. By providing the pipe connection portions 119 in a concentrated manner near the side surface (side surface on the side opposite to the heat pump unit) of the housing, the length of the housing in the front-rear direction (the forward direction in the rear view 2 and the left-right direction in FIG. 3) is reduced. It is possible to install in a place where the distance from the adjacent land is narrow (for example, the boundary of the adjacent land 500 mm). In addition, since the pipe connecting portion 119 is positioned below the inside of the housing, the length of the pipe and the pressure loss of the pipe can be reduced, and the pipe assembling work can be performed collectively in a low place.

  A drainage drain 120 is provided at the bottom of the tank 2. The drainage drain 120 penetrates the tank side base portion 117 and extends further downward. FIG. 3 is a schematic side view of the tank-side housing 112 when viewed from the side opposite to the heat pump unit.

  Next, an example of the arrangement of each hot water supply functional component in the upper part of the tank 2 will be described with reference to FIG. FIG. 4 is a partially enlarged view showing the positional relationship between the upper portion of the tank 2 and the water-refrigerant heat exchanger 1. As shown in FIG. 4, the switching valve 11 is disposed at a position higher than the discharge port 12 and the pipe take-out flange that hit the top of the tank 2, and when the tank 2 is viewed in plan view, on the outer peripheral edge of the tank 2, Or it is located inside the outer peripheral edge. Further, the tank 2 is covered with a heat insulating material 20 around the side portion extending in the vertical direction, the upper surface 2a, the top surface including the pipe take-out flange, the top portion, and the pipe protruding from the tank.

  The refrigerant outflow portion 19 of the water-refrigerant heat exchanger 1 is provided at substantially the same height as the discharge port 12 and the pipe outlet flange. The upper end portion of the water-refrigerant heat exchanger 1 is disposed at substantially the same height as the hot water return pipe 10a and the switching valve 11, and the upper end portion of the heat pump unit and the upper end portion of the tank unit are adjusted to the same height. Is arranged.

  Due to the configuration in which the lower end portion 1c of the water-refrigerant heat exchanger is supported by the connecting portion 116 and the above configuration, the length in the height direction of the water-refrigerant heat exchanger 1 is larger than the length in the height direction of the tank 2. The heating capacity of the heat pump unit can be increased by effectively utilizing the limited space in the housing. Furthermore, since the length of the pipe from the outflow part 19 of the water-refrigerant heat exchanger 1 to the discharge port 12 can be shortened, the flow path resistance between them can be reduced, the heat radiation of the pipe part can be reduced, and the energy loss. Can be reduced.

  Moreover, it is preferable to arrange a plurality of mixing valves above the top of the tank 2, the upper surface 2a, the shoulders, etc., and to place 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.

  The heat pump type hot water storage hot water apparatus of the present embodiment includes a heat pump unit 100, a tank unit, a heat pump side casing 111, 111A in which the heat pump unit 100 is stored, and a tank side casing 112 in which the tank unit is stored. 112A, a heat pump side leg portion 113 that supports the heat pump side casing portions 111 and 111A, and a tank side leg portion 114 that supports the tank side casing portions 112 and 112A.

  The heat pump side casings 111 and 111A and the tank side casings 112 and 112A constitute one casing, and the tank side bases 117 and 117A are arranged at positions higher than the heat pump side bases 115 and 115A. Has been. Further, the distance between the foundation 200 on which the tank side leg 114 is installed and the tank side base parts 117 and 117A is larger than the distance between the foundation 200 on which the heat pump side leg 113 is installed and the heat pump side base parts 115 and 115A. It is getting longer.

  According to this configuration, since the distance (drainage space) between the drainage drain 120 and the drainage port of the drainage hopper and the work space at the time of construction and maintenance can be secured on the tank unit side, A drainage passage can be formed without embedding drainage grooves and traps inside, and it is easy to perform pipe connection work and work for winding a heat insulating material around the pipe. Furthermore, since the storage space of the heat pump unit can be made larger than the storage space of the tank unit, the heat transfer area of the evaporator 103 and the water-refrigerant heat exchanger 1 can be made as large as possible to ensure the capacity of the heat pump unit. The storage space of the tank unit can be reduced and the height of the entire apparatus can be suppressed.

(Second Embodiment)
This embodiment has shown the modification of the hot water supply functional component unit with respect to 1st Embodiment. Other configurations are the same as those in the first embodiment. FIG. 5 is a schematic view showing the arrangement of the components constituting the heat pump hot water storage / hot water device 110 </ b> A of the present embodiment in the housing.

  As shown in FIG. 5, the hot water supply functional component unit 118 </ b> A that constitutes the assembly of each hot water supply functional component is concentrated in a position higher than the upper surface 2 a of the tank 2 in the tank side housing portion 112. . With this configuration, when the high-temperature water at the top of the tank flows through the hot water supply pipe 22, the heat released upward is retained between the top of the tank 2 and the top surface of the casing. As a result, the hot water supply functional parts are further warmed, and the effect of preventing freezing becomes remarkable. Further, the hot water supply functional component unit 118A and the pipe connection portion 119 are connected by a predetermined number of pipes.

(Third embodiment)
This embodiment has shown the modification of the installation location of the piping connection part with respect to 2nd Embodiment. Other configurations are the same as those in the first embodiment and the second embodiment. FIG. 6 is a schematic view showing the arrangement of the components constituting the heat pump hot water storage hot water device 110B of the present embodiment in the housing.

  As shown in FIG. 6, the pipe connection portion 119 of the present embodiment is disposed so as to protrude from the top surface of the housing above the tank 2. With this configuration, the pipe connection part 119 is arranged near the place where the hot water supply functional parts are arranged, so that the length of the pipe and the pressure loss of the pipe can be reduced, and maintenance and pipe assembly work can be integrated at the top of the housing. It can be carried out.

(Fourth embodiment)
This embodiment has shown the modification of the housing | casing used as the outer shell of the heat pump hot water storage hot water apparatus with respect to 1st Embodiment. Other configurations are the same as those in the first embodiment. FIG. 7 is a perspective view showing an external appearance of a housing that houses the heat pump hot water storage / hot water device 110C of the present embodiment. In addition to the configuration in which the tank-side base portion 117A that is the bottom portion of the tank-side housing portion 112A is disposed at a position higher than the heat pump-side base portion 115A that is the bottom portion of the heat pump-side housing portion 111A, The following configuration is provided.

  As shown in FIG. 7, the heat pump side housing 111 </ b> A constituting the outer shell on the heat pump side of the heat pump type hot water storage hot water device 110 </ b> C has air from the outside to the evaporator 103 on the front surface facing the internal evaporator 103. A suction port of the blower 107 to be introduced is provided. And the blower outlet (not shown) which blows off the air which passed the evaporator 103 outside is formed in the back surface facing the front surface in which the said suction inlet was formed.

  The heat pump side casing 111A in which the evaporator 103 and the blower 107 are arranged is formed to have a shorter width in the depth direction (the ventilation direction of the blower 107) than the tank side casing 112A. The front surface of the heat pump side housing part 111A and the front surface of the tank side housing part 112A are inclined so as to protrude forward from the heat pump side housing part 111A side toward the tank side housing part 112A side. Are smoothly connected by.

  In addition, the heat pump side housing portion 111A may be configured to include a suction port on the back surface and an air outlet on the front surface. Further, the heat pump side housing part 111A and the tank side housing part 112A may form a flat surface by combining the back surfaces as shown in FIG. 7, or the flat surfaces by combining the respective front surfaces. May be configured. Further, the heat pump side base portion 115A, the connecting portion 116A, and the tank side base portion 117A have the same configuration and operational effects as the heat pump side base portion 115, the connecting portion 116, and the tank side base portion 117 of the first embodiment, respectively. is there.

  When installing the heat pump hot water storage hot water apparatus 110C in a narrow place such as under a house eaves or on a veranda of an apartment house, the apparatus is installed with an air passage (for example, a space of 10 cm or more from the wall) on the back side. By forming the heat pump side housing portion 111A so that the length in the depth direction is shorter than the tank side housing portion 112A, a blowout space can be formed around the blowout port, so that the air blown out by the blower 107 can be reliably Can be discharged to the outside. Therefore, when the apparatus is installed in a narrow place, it is possible to prevent a short circuit in which the blown-out air after heat exchange flows into the suction side of the evaporator 103.

(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 circuit of the heat pump unit 100 is not limited to carbon dioxide, and may be other refrigerants such as Freon.

  In addition, the heat pump unit 100 of the above embodiment is based on a supercritical heat pump cycle in which the refrigerant pressure is equal to or higher than the critical pressure, but is not limited thereto, and is based on a heat pump cycle in which the refrigerant pressure is less than the critical pressure. Good thing.

It is the piping figure which showed the heat pump type hot water storage hot water apparatus in 1st Embodiment to 4th Embodiment, and the piping structure in connection with this. It is the schematic diagram which showed arrangement | positioning in the housing | casing of each component which comprises the heat pump type hot water storage hot water apparatus of 1st Embodiment. It is the typical side view which looked at the housing | casing which comprises the outer shell of the heat pump type hot water storage hot water apparatus of 1st Embodiment from the anti-heat pump unit side. It is the elements on larger scale which showed the positional relationship of the tank upper part and water-refrigerant heat exchanger in 1st Embodiment. It is the schematic diagram which showed arrangement | positioning in the housing | casing of each component which comprises the heat pump type hot water storage hot water apparatus of 2nd Embodiment. It is the schematic diagram which showed the arrangement configuration in the housing | casing of each component which comprises the heat pump type hot water storage hot water apparatus of 3rd Embodiment. It is the perspective view which showed the external appearance of the housing | casing which comprises the outer shell of the heat pump type hot water storage hot water apparatus of 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Water-refrigerant heat exchanger 1c ... Lower end part of water-refrigerant heat exchanger 2 ... Tank 100 ... Heat pump unit 111, 111A ... Heat pump side housing | casing part 112, 112A ... Tank side housing | casing part 113 ... Heat pump side leg part 114 ... tank side legs 115, 115A ... heat pump side base part 116, 116A ... coupling part 117, 117A ... tank side base part 119 ... pipe connection part 200 ... foundation (installation surface)

Claims (5)

A heat pump unit (100) for boiling water for hot water supply by exchanging heat with a high-temperature and high-pressure refrigerant;
A tank unit having a tank (2) for storing hot water supply water heated by the heat pump unit (100);
A heat pump side housing (111, 111A) in which the heat pump unit (100) is housed;
A tank side housing (112, 112A) in which the tank unit is stored;
A heat pump side leg (113) for supporting the heat pump side casing (111, 111A);
Tank-side legs (114) that support the tank-side housing (112, 112A),
The heat pump side casing (111, 111A) and the tank side casing (112, 112A) constitute one casing.
The tank side base part (117, 117A) which is the bottom part of the tank side casing part (112, 112A) is the heat pump side base part (115, 115A) which is the bottom part of the heat pump side casing part (111, 111A). Is placed higher than,
The distance between the installation surface (200) on which the tank-side leg (114) is installed and the tank-side base (117, 117A) is the installation surface on which the heat pump-side leg (113) is installed ( 200) and the heat pump side base portion (115, 115A) is longer than the distance between the heat pump type hot water storage hot water device. The heat pump unit (100) has a water-refrigerant heat exchanger (1),
The tank side base part (117, 117A) and the heat pump side base part (115, 115A) are integrally connected by a connecting part (116),
The heat pump hot water storage hot water device according to claim 1, wherein the connecting portion (116, 116A) supports a lower end (1c) of the water-refrigerant heat exchanger (1). A pipe connection part (119) for connecting a pipe connected to a hot water supply use side terminal where hot water for hot water heated by the heat pump unit (100) is discharged and a pipe connected to the tank (2);
The heat pump hot water storage hot water apparatus according to claim 1 or 2, wherein the pipe connection portion (119) is provided near a side surface of the tank side housing portion (112). A pipe connection part (119) for connecting a pipe connected to a hot water supply use side terminal where hot water for hot water heated by the heat pump unit (100) is discharged and a pipe connected to the tank (2);
The heat pump hot water storage hot water apparatus according to claim 1 or 2, wherein the pipe connection portion (119) is provided near the top surface of the tank side housing portion (112). The heat pump unit (100) includes an evaporator (103) and a blower (107) that forms air passing through the evaporator (103).
The heat pump side casing (111A) includes the air suction port on either the front surface or the back surface and the air outlet on the other side, and the width in the depth direction is larger than that of the tank side casing (112A). The heat pump hot water storage hot water device according to any one of claims 1 to 4, wherein the heat pump hot water storage device is short.

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