JP2008309404A - Heat pump type hot water storage water heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump-type hot water storage water heating device capable of ensuring workability in maintenance and construction without affected by installation conditions. <P>SOLUTION: This heat pump type hot water storage water heating device comprises a heat pump unit 100, a tank 2 for storing heated water for hot water supply, a housing 110 in which the heat pump unit 100 and the tank 2 are disposed right and left and having a length between side walls in the horizontal direction longer than a length in the depth direction, a control board 125 disposed between a tank-side side wall 112 at one side of both side walls 111, 112 of the housing 110 and the tank 2, and a connecting portion 119 and the like for water supply. The tank-side side wall 112 is partially or fully openable and closable or mountable and demountable, and the control board 125 and the connecting portion 119 and the like for water supply are disposed to face the outside at the side of the housing 110, when the tank-side side wall 112 is partially or fully opened or demounted. <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, a tank circuit that stores heated hot water as hot water supply water, and a control device are provided as one unit. A device that is housed and integrated in a housing is known (for example, see Patent Document 1).

The integrated heat pump type hot water storage hot water device described in Patent Document 1 has a structure in which the control device can be pulled out from the front surface of the housing, and the electrical component can be used without opening the top plate of the housing even when there is little space in the upper part of the main body. Maintenance is possible.
JP 2006-349235 A

  However, when the conventional heat pump hot water storage hot water device is installed in a confined space where the space between the building and the neighbor's site found in an urban area is not sufficient, for example, due to installation restrictions There is a problem that there is no work space on the front side and the back side, and it is difficult for an operator to perform maintenance and construction from the front side of the housing.

  Then, this invention is made | formed in view of the said problem, The objective is to provide the heat pump type hot water storage hot-water apparatus which can ensure the workability | operativity at the time of a maintenance or construction without being influenced by installation conditions.

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). (2), a heat pump unit (100), and a tank (2) are stored side by side, and a case (110) in which the length between both side walls in the left-right direction is longer than the length in the depth direction. ) And a control board (between the tank side wall (112) located on the tank (2) side of the left and right side walls (111, 112) of the housing (110) and the surface of the tank (2) ( 125) and pipe connecting portions (119, 131, 132, 133),
Part or all of the tank side wall (112) is configured to be openable and detachable, and the control board (125) and the pipe connection parts (119, 131, 132, 133) are arranged on the tank side wall (112). It is characterized by being arranged so as to face the outside of the casing (110) side by opening or removing part or all of it.

  According to the present invention, the casing can be installed with the front-rear direction of the casing positioned in a narrow direction of the space at the installation site, and the casing that effectively uses the left and right work space with a relatively large space. Since maintenance and construction can be performed on the control board and the pipe connection portion from the outside of the left and right side walls, a heat pump hot water storage hot water apparatus that can ensure workability during maintenance and construction regardless of installation conditions can be provided.

  Furthermore, the power supply line attachment part (134) to which the power supply line (135) is attached is provided, and the power supply line attachment part (134), the control board (125), and the pipe connection parts (119, 131, 132, 133) It is preferable that the tank side wall (112) and the surface of the tank (2) are collectively arranged.

  According to this invention, the power line attachment part, the control board, and the pipe connection part, which are the target parts at the time of maintenance and construction, are arranged at a place where the operation can be reliably performed from the outside of the lateral side wall of the housing. , Because the worker can work using the space for the length in the depth direction of the housing even in a narrow area where the distance to the adjacent land is narrow, ensuring normal workability without being forced into an unreasonable posture be able to.

  In addition, a power line attachment portion (134) to which the power line (135) is attached is provided, and the tank side wall (112) is constituted by a plurality of side plates (112a, 112b, 112c) configured to be openable and detachable. The plurality of side plates (112a, 112b, 112c) are formed so as to cover the control substrate (125), the control substrate side plate (112a), the power line attachment portion (134), and the pipe connection portion ( 119, 131, 132, 133) and the construction side plates (112b, 112c) disposed so as to cover the control board (125) by opening or removing the control board side plates (112a). Facing the outside of the body (110) side and opening or removing the construction side plates (112b, 112c), Connecting portions (119,131,132,133) is configured to face the outside of the housing (110) side.

  According to the present invention, since the predetermined side plate is opened or removed according to the target part at the time of maintenance or construction, the burden on the operator during work can be reduced and workability can be improved.

  The casing (110) is arranged so that the back surface in the depth direction faces the building (140), and a plurality of pipe connection portions (119, 131, 132, 133) are arranged in the depth direction of the casing (110). In the pipe connection part (132, 133) arranged near the back surface among the plurality of pipe connection parts (119, 131, 132, 133), the hot water in the bathtub is circulated in the bathtub. It is preferable that a circulation pipe to be connected is connected.

  According to this invention, since the pipe connection part of the circulation pipe is arranged at a position close to the bathtub arranged in the building, the pipe length can be shortened, and the pipe resistance and the material cost can be reduced. I can plan.

  Furthermore, the control apparatus (130) which controls a heat pump unit (100) is provided, and a control apparatus (130) adjoins the heat pump unit side wall (111) located in the heat pump unit (100) side in a housing | casing (110). The heat pump unit side wall (111) is partly or entirely configured to be openable / detachable, and by opening or removing part or all of the heat pump unit side wall (111). The control device (130) preferably faces the outside of the casing (110).

  According to the present invention, the workability of the heat pump unit side part can be improved in addition to ensuring the workability of the tank side part during maintenance or the like regardless of the installation conditions.

  Furthermore, the control apparatus (130) which controls a heat pump unit (100) is provided, and a control apparatus (130) adjoins the heat pump unit side wall (111) located in the heat pump unit (100) side in a housing | casing (110). The top plate (116) provided near the heat pump unit of the housing (110) is configured to be openable and detachable, and by opening or removing the top plate (116), It is preferable that the control device (130) faces the outside above the housing (110).

  According to the present invention, maintenance of the heat pump control device can be performed even from above the housing, and workability on the heat pump unit side can be further improved.

  Moreover, you may arrange | position a piping connection part (119) to the upper part of a housing | casing (110). According to the present invention, since the pipe connection portion is disposed near the tank, the length of the pipe and the pressure loss of the pipe can be reduced. In addition, it is effective when maintenance and piping assembly work are required to be integrated at the top of the housing.

  Moreover, it is preferable to provide the drainage means (120) which collects the waste water from the heat pump unit (100), the tank (2) and the piping and discharges it to the outside of the housing (110). According to this invention, the wastewater in the housing is collected at one place and drained, whereby the mechanism for wastewater treatment can be simplified and the number of man-hours for construction can be reduced.

  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 and installation state of the heat pump hot water storage hot water apparatus in the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view showing a heat pump type hot water storage hot water device and a pipe configuration in the present embodiment.

  The heat pump hot water storage hot water apparatus of the present embodiment is a hot water storage heat pump hot water supply apparatus, and is mainly used for general household use. Hot water for hot water stored in the tank 2 or the heat pump unit 100 is used. The hot water boiled in is supplied to the hot-water usage terminal for the kitchen, washroom, bathroom, etc. 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 is configured so that the 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 that communicates between the tank 2 and the water-refrigerant heat exchanger 1, a hot water supply pipe 22 through which hot water from the high-temperature water section in the tank 2 flows out to the hot water supply side terminal, and the water-refrigerant heat exchanger 1 The hot water heated in the water flow path 1a reaches the tank 2, and the direct hot water piping 3 connecting the circulating piping 10 and the hot water supply piping 22, and the intermediate hot water portion in the tank 2 and the direct hot water piping 3 are connected. 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 for the heat pump unit. 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. Further, 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. Further, the heat pump unit 100 may be configured by an ejector 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 performs a boiling water supply operation to boil the hot water in the tank 2 mainly using the midnight power in the midnight time zone when the hot water stored in the tank 2 is insufficient or at a low price. .

  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. 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. A discharge pipe provided with a relief valve 35 is connected to the hot water supply pipe 22 in the middle of the path. When the pressure in the tank 2 rises above a predetermined pressure, the hot water in the tank 2 is discharged to the outside so that the tank 2 and the like are not damaged.

  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 a control board 125 provided on the side of the tank 2, and are based on temperature information detected by the water temperature thermistor 30 and the hot water temperature thermistor 33. Controlled. The control board 125 is a device that controls hot water supply functional components such as various valves, pumps, various thermistors, flow rate counters, and switches provided in pipes extending from the tank 2 to the hot water use side terminal and the water supply side terminal (city water). . 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. The control board 125 and the control device 106 perform bidirectional communication with each other.

  A hot water supply pipe 22 and a branched bath pipe 18 are connected to the downstream portion of the second mixing valve 5. Here, the temperature is adjusted so that the temperature information detected by the hot water temperature thermistor 33 is about + 2 ° C. with respect to the bath 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 board 125, 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 pipe 18 is output to the control board 125, respectively.

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

  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 determines the presence or absence of the bath water in the bathtub based on the ON time of the switch. 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 disposed above the upper surface 2a of the tank 2, and may be disposed between the tank side wall 112 and the tank side surface. 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. In particular, hot water supply functional parts with high replacement frequency and repair frequency such as a pump, a pressure reducing valve, a mixing valve, and a solenoid valve are preferably arranged at positions facing the tank side wall 112. Thereby, about hot water supply functional parts with high replacement frequency and repair frequency, the maintenance and construction can be performed from the outside of the side wall in the left and right direction of the housing 110 by effectively utilizing the work space in the left and right direction having a relatively large space. .

  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 driving component (pump) for forcibly moving a 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 For example, an exchanger (not shown).

  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. (See FIGS. 3 and 4).

  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 respective volume information, flowing water information and temperature information to the control board 125, and the bath circulation electric valve 48 and the circulation pump. 49 is controlled by the control board 125.

  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 bath 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 and the control board 125 are 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 106 and the control board 125 include 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 controller (not shown). And a 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 based on an operation signal from an operation switch of a bath remote control (not shown) or the like. The actuators such as the circulation pump 9 and the bath 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.

  Further, the heat pump hot water storage hot water device may be configured to include a reheating heat exchanger that reheats hot water in a bath tub by heat exchange. When this reheating operation is performed, the control device 106 and the control board 125 continue 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 perspective view showing a state in which the heat pump hot water storage hot water apparatus is installed in a narrow space where the distance to the adjacent land boundary is narrow. As shown in FIG. 2, the case 110 in which the heat pump unit 100 and the tank 2 are stored side by side is a box that has a vertically long rectangular parallelepiped length longer than the length in the depth direction.

  The casing 110 is installed so that the rear surface in the depth direction faces the building 140 where the heat pump hot water storage hot water apparatus is used, the front surface in the depth direction faces the adjacent ground, and the fence 141 exists immediately before the front surface. The fence 141 is installed on the boundary with the adjacent land, and the distance L (see FIGS. 2 and 4) from the building 140 to the fence 141 is about 500 mm, for example.

  In this way, an elongated space along the fence 141 and the building 140 is formed between the building 140 and the fence 141. When the casing 110 is installed in this elongated space, there is no space for the operator to enter between the front surface of the casing 110 and the fence 141 or between the rear surface of the casing 110 and the building 140. The work space is limited to the outside of the casing 110 and above the top plate 106.

  FIG. 3 is a schematic view showing the arrangement of the components constituting the heat pump hot water storage hot water apparatus in the housing 110. As shown in FIG. 3, the heat pump hot water storage hot water device includes a tank unit and a heat pump unit. Both units are housed in the housing 110 and installed in an integrated appearance. The housing 110 may be configured by integrally coupling the housings that store the units, or may be configured such that both units are arranged in a single housing 110 as in the present embodiment. .

  The tank unit is mainly composed of a hot water supply functional part and each pipe for connecting the tank 2, the tank 2 and the hot water supply side terminal or bathtub, and controlling the flow of hot water. The housing 110 is housed inside one side in the left-right direction (the right side in FIG. 3).

  The casing 110 is a container that constitutes an outer shell of a heat pump hot water storage hot water device surrounded by a top plate 116, a heat pump unit side wall 111, a tank side wall 112, a back plate, a front plate, and a bottom plate 115. The housing 110 includes two heat pump unit side legs 113 and tank side legs 114 each extending from the bottom plate 115 downward in the vertical direction. The heat pump unit side legs 113 and the tank side legs 114 are fixed to the installation base 200 with anchor bolts or the like.

  The heat pump unit 100 is disposed adjacent to the heat pump unit side wall 111 of both side walls in the left-right direction. Inside the housing 110, the evaporator 103 is provided along substantially the entire vertical direction of the back plate of the housing 110. Further, two blowers 107 for blowing air to the evaporator 103 are provided side by side between the front surface of the evaporator 103 and the front plate of the housing 110.

  Further, the compressor 101 is fixed to the bottom plate 115 via attachment legs at the lower part in the housing 110. The ventilation direction by the blower 107 is the direction from the front of FIG. 2 toward the depth, and the front plate of the housing 110 is provided with a suction port, and the rear plate is provided with a blower outlet.

  The water-refrigerant heat exchanger 1 has a shape extending over the entire width in the vertical direction and the width in the depth direction so as to bisect the space in the housing 110 in the left-right direction, and is provided along the side wall of the tank 2. A control device 130 for controlling the heat pump unit is provided in the upper part of the housing 110 on the heat pump unit side so as to face the top plate 116 and to be adjacent to the heat pump unit side wall 111.

  The heat pump unit side wall 111 is formed by a side plate configured to be detachable by attachment means such as screws. It can be easily attached and detached by operating the attaching means from the outside of the casing by an operator during maintenance or the like. Further, the side plate may be configured to be detachable, or may be configured to be openable and closable from the outside of the housing side by providing a hinge portion or a hinge without being removed. As described above, the heat pump unit side wall 111 is configured such that part or all of the side wall 111 can be opened and closed or detached.

  The top plate 116 is configured to be detachable on the heat pump unit side by attaching means such as screws. Moreover, the top plate 116 may be configured to be detachable, or may be configured to be openable and closable by including a hinge portion and a hinge without being removed. Furthermore, the top plate 116 may be configured to be openable / closable or detachable on the tank side by the attaching means.

  The hot water supply functional unit 118 is provided at a position higher than the upper surface 2 a of the tank 2 at the upper part of the tank 110 in the casing 110. 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. As a result, the hot water supply functional component is warmed and the hot water supply functional component can be prevented from freezing.

  A drainage drain 120 is provided at the bottom of the tank 2. The drainage drain 120 is a drainage means for collecting the condensed water generated in the casing 110 and drainage from the tank 2 and the piping and draining it outside, so as to cover the entire lower end of the evaporator 103 and the like further below. The drain pan 117 is connected to the drainage receiving surface of the drain pan 117 and is also connected to the lower part of the tank 2. The drainage drain 120 extends further down through the bottom plate 115.

  FIG. 4 is a side view showing the arrangement of the components in the housing 110 as seen from the IV direction of FIG. As shown in FIG. 4, in the vicinity of the tank side wall 112 located on the tank 2 side of the both side walls in the left and right direction, the hot water supply functional component unit 118 and each pipe connected to the hot water supply use side terminal are connected. A plurality of pipe connections are provided. A plurality of pipe connection portions are provided, and a water supply connection portion 119, a hot water connection portion 131, and a bathtub inflow connection portion 132 are arranged in order from the front side to the back side in the lower part of the housing 110. And a bathtub outflow connection portion 133.

  The water supply connecting portion 119 is a joint means for connecting a pipe for taking in city water such as tap water and a pipe 122 (such as the city water pipe 14) extended from the hot water supply functional component unit 118. The hot water connecting portion 131 is a joint means for connecting a pipe connected to the hot water supply use side terminal and a pipe 136 (such as the hot water supply pipe 22) extended from the hot water supply functional component unit 118.

  The bathtub inflow connecting portion 132 is a circulation pipe connected to the bathtub to circulate the hot water in the bathtub and a pipe 137 that extends from the hot water supply functional component unit 118 and flows through the hot water flowing into the bathtub (tub inflow pipe 51). It is a joint means for connecting. The bathtub outlet connection section 133 is a pipe 138 (tub outlet outlet pipe 50) that extends from the circulation pipe connected to the bathtub to circulate hot water in the bathtub and the hot water flowing from the hot water supply functional part unit 118 and flows out of the bathtub. It is a joint means for connecting.

  A lower support member 121, a middle support member 124, and an upper support member 123 are arranged in the housing 110 near the tank side wall 112 in order from the bottom plate 115 side to the top plate 116 side. Each support member is fixed across the inside of the housing 110 along the tank side wall 112 so as to bridge the front plate and the back plate.

  The lower support member 121 supports the pipes 122, 136, 137, and 138, the power line 135, and all the pipe connection parts in a stationary state. The middle support member 124 supports the power line attachment part 134 to which the power line 135 is attached, the pipes 122, 136, 137, and the control board 125 in a stationary state. The upper support member 123 supports the pipes 122, 136, 137, and 138 and the control board 125 in a stationary state.

  The tank side wall 112 includes a plurality of side plates arranged in the vertical direction, which are a control board side plate 112a, a power supply side plate 112b, and a pipe connection side plate 112c. The plurality of side plates are individually detachable by attaching means such as screws, and can be easily attached and detached by operating the attaching means from the outside of the casing by an operator during maintenance or the like.

  Further, each of the plurality of side plates may be configured to be detachable, or may be configured to be openable and closable from the outside of the casing side by providing a hinge portion or a hinge without being removed. As described above, the tank side wall 112 is configured such that a part or all of the tank side wall 112 can be opened and closed or detached.

  The control board side plate 112a has a size and a position capable of covering the side of the hot water supply functional component unit 118 facing the tank side wall and the control board 125. The control board 125 is closer to the tank side wall 112 than the pipes 137 and 138, and is supported at both ends in the vertical direction by the upper side support member 123 and the middle side support member 124 in a posture facing the control board side plate 112a. ing.

  In maintenance such as maintenance inspection, repair, replacement, etc. related to the hot water supply functional parts, the operator opens or removes the control board side plate 112a so that the control board 125 faces the outside of the casing and faces the control board 125. Therefore, even when installed in a confined area, a work space can be secured and high-quality work can be performed.

  The power supply side plate 112b has a size and a position capable of covering the power supply line attachment portion 134, and includes a decorative window 112d at a position covering the power supply line attachment portion 134. The decorative window 112d is configured to be attachable / detachable or openable by attachment means such as a screw, and the operator can operate the power supply line attaching portion 134 from the outside by removing or opening the decorative window 112d. Since the power line attaching portion 134 is provided with a breaker, the operator first removes the decorative window 112d during construction or maintenance to operate the breaker to make it electrically safe, and then the power source side plate 112b. The work can be proceeded by removing and the like.

  The pipe connection side plate 112c has a size and a position capable of covering the lower portion of the tank 2 and the water supply connection portion 119, the hot water connection portion 131, the bathtub inflow connection portion 132, and the bathtub outflow connection portion 133. Yes. The side plate 112b for power supply and the side plate 112c for pipe connection are construction side plates provided so that a worker can remove only these side plates at the time of construction to perform power construction and piping work.

  At the time of construction or maintenance, the operator can open or remove the construction side plate so that the power line attachment part 134 and the pipe connection part can be exposed to the outside of the casing side. Since the work can be performed in a posture facing the connection portion, even when installed in a confined area, a work space can be secured and high-quality work can be performed.

  Next, an outline procedure at the time of construction will be described. First, an integrated heat pump hot water storage hot water device housed in the housing 110 is installed on the foundation 200 by fastening an anchor bolt or the like. Further, a drainage hopper 126 and a drainage groove 127 are installed on the foundation 200 so that the drainage is smoothly performed. Next, the control board side plate 112a and the construction side plate are opened or removed, and power supply work and piping work are performed. Further, the drainage drain 120 that collects and drains the water generated in the housing 110 is installed so as to be guided to the drainage hopper 126. After all construction is completed, trial operation is performed, and if normal operation is confirmed, the construction is finished.

  The heat pump hot water storage hot water apparatus of the present embodiment includes a heat pump unit 100, a tank 2 for storing hot water heated by the heat pump unit 100, a heat pump unit 100 and the tank 2 side by side, and is stored in a horizontal direction. The housing 110 is formed such that the length between both side walls is longer than the length in the depth direction, and the control board 125 and the pipe connection portion provided between the tank side wall 112 and the surface of the tank 2 are provided. .

  Further, a part or all of the tank side wall 112 is configured to be openable and detachable. Then, by opening or removing a part or all of the tank side wall 112, the control board 125 and the pipe connection part are arranged to face the outside of the casing 110 side.

  According to this configuration, in the heat pump hot water storage hot water apparatus that is installed with the front-rear direction (depth direction) of the housing 110 positioned in a narrow direction of the space at the installation site, the work space in the left-right direction with a relatively large space is effectively used. Utilizing the control board 125 and the pipe connection portion, maintenance and construction can be performed from the outside of the lateral wall of the casing 110. Thereby, construction and maintenance can be performed while ensuring normal working conditions regardless of the installation conditions.

  Furthermore, the power line attachment part 134, the control board 125, and the pipe connection part are concentrated between the tank side wall 112 and the surface of the tank 2, so that the worker is in a confined area with a short distance from the adjacent ground. However, since work can be performed using a space corresponding to the length in the depth direction of the housing, normal work conditions can be ensured without being forced into an unreasonable posture.

  Further, by providing the drainage drain 120 that collects drainage from the heat pump unit 100, the tank 2 and the piping and discharges the drainage to the outside of the casing 110, the drainage in the casing 110 can be collected and drained in one place, The mechanism for wastewater treatment can be simplified and the number of man-hours for construction can be reduced.

(Second Embodiment)
This embodiment has shown the modification of the installation location of the piping connection part 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 apparatus of the present embodiment in the housing 110.

  As shown in FIG. 5, the pipe connection portion 119 of the present embodiment is disposed so as to protrude from the top plate 116 of the housing 110 above the tank 2. A water supply connection portion 119 which is a pipe connection portion is connected to the hot water supply functional component unit 118 by a pipe 122A extending in the vertical direction. The drainage drain 120 is connected to a drainage pipe 122B extending from the hot water supply functional component unit 118 toward the bottom plate 115. With this configuration, drainage from the heat pump unit 100 and the tank 2 and drainage from the hot water supply functional component unit 118 are collected in the drainage drain 120 and then discharged to the drainage groove 127.

  According to the heat pump type hot water storage hot water device of this embodiment, since the pipe connection part is arranged in a place close to the place where the hot water supply functional parts are arranged, the length of the pipe and the pressure loss of the pipe can be reduced, and further, maintenance and pipe assembly are performed. Work can be performed collectively at the top of the housing.

(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. It may be a thing.

It is the piping figure which showed the heat pump type hot water storage hot water apparatus of 1st Embodiment and 2nd Embodiment, and the piping structure in connection with this. It is the perspective view which showed the state which installed the heat pump type hot water storage hot water apparatus of 1st Embodiment in the confined space. It is the schematic diagram which showed arrangement | positioning in the housing | casing 110 of each component which comprises the heat pump type hot water storage hot water apparatus of 1st Embodiment. FIG. 4 is a side view showing the arrangement of components in a housing 110 as viewed from the IV direction in FIG. 3. It is the schematic diagram which showed arrangement | positioning in the housing | casing 110 of each component which comprises the heat pump type hot water storage hot water apparatus of 2nd Embodiment.

Explanation of symbols

2 ... Tank 100 ... Heat pump unit 110 ... Housing 111 ... Heat pump unit side wall 112 ... Tank side wall 112a ... Control board side plate 112b ... Power supply side plate (construction side plate)
112c ... Pipe connection side plate (construction side plate)
116 ... Top plate 119 ... Connection part for water supply (pipe connection part)
120 ... drainage drainage (drainage means)
125 ... Control board 130 ... Control device 131 ... Connecting part for hot water (pipe connecting part)
132 ... Bath inflow connection (pipe connection)
133 ... Bath outflow connection (pipe connection)
134 ... Power supply line attachment part 135 ... Power supply line 140 ... Building

Claims (8)

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 (2) for storing hot-water supply water heated by the heat pump unit (100);
A housing (110) in which the heat pump unit (100) and the tank (2) are stored side by side, and the length between both side walls in the left-right direction is longer than the length in the depth direction; ,
Control provided between the tank side wall (112) located on the tank (2) side of the left and right side walls (111, 112) of the housing (110) and the surface of the tank (2). A board (125) and a pipe connection part (119, 131, 132, 133),
Part or all of the tank side wall (112) is configured to be openable and detachable,
The control board (125) and the pipe connection parts (119, 131, 132, 133) are formed on the side of the casing (110) by opening or removing part or all of the tank side wall (112). A heat pump type hot water storage hot water device which is arranged so as to face the outside. A power line attachment portion (134) to which the power line (135) is attached;
The power line attachment portion (134), the control board (125), and the pipe connection portions (119, 131, 132, 133) are aggregated between the tank side wall (112) and the surface of the tank (2). The heat pump hot water storage hot water device according to claim 1, wherein the heat pump hot water storage hot water device is arranged. A power line attachment portion (134) to which the power line (135) is attached;
The tank side wall (112) is formed by a plurality of side plates (112a, 112b, 112c) configured to be openable and detachable.
The plurality of side plates (112a, 112b, 112c) include a control board side plate (112a) disposed so as to cover the control board (125), the power supply line attachment portion (134), and the pipe connection portion. Construction side plates (112b, 112c) arranged to cover (119, 131, 132, 133),
By opening or removing the control board side plate (112a), the control board (125) faces the outside of the housing (110) side, and the construction side plates (112b, 112c) are opened or removed. The said power supply wire attaching part (134) and the said piping connection part (119, 131, 132, 133) face the exterior of the said housing | casing (110) side by this, The Claim 1 or 2 characterized by the above-mentioned. Heat pump hot water storage system. The housing (110) is arranged so that the back surface in the depth direction faces the building (140),
A plurality of the pipe connection portions (119, 131, 132, 133) are arranged in the depth direction of the casing (110),
Of the plurality of pipe connection parts (119, 131, 132, 133), the pipe connection parts (132, 133) arranged closer to the back surface are connected to the bathtub in order to circulate hot water in the bathtub. The heat pump hot water storage hot water device according to any one of claims 1 to 3, wherein a circulation pipe is connected. The apparatus further includes a control device (130) for controlling the heat pump unit (100), and the control device (130) is adjacent to the heat pump unit side wall (111) located on the heat pump unit (100) side, and the housing. (110) is located at the top,
Part or all of the heat pump unit side wall (111) is configured to be openable or detachable,
The control device (130) faces the outside of the casing (110) side by opening or removing a part or all of the heat pump unit side wall (111). The heat pump hot water storage hot water device according to any one of the above. The apparatus further includes a control device (130) for controlling the heat pump unit (100), and the control device (130) is adjacent to the heat pump unit side wall (111) located on the heat pump unit (100) side, and the housing. (110) is located at the top,
The top plate (116) provided near the heat pump unit of the housing (110) is configured to be openable and detachable,
The heat pump according to any one of claims 1 to 5, wherein the control device (130) faces the outside above the housing (110) by opening or removing the top plate (116). Type hot water storage system.   The heat pump hot water storage / hot water apparatus according to any one of claims 1 to 6, wherein the pipe connection portion (119) is disposed on an upper portion of the housing (110).   8. A drainage means (120) for collecting drainage from the heat pump unit (100), the tank (2), and piping and discharging it to the outside of the housing (110). The heat pump hot water storage hot water device according to claim 1.

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