JP2017044450A - Heat pump water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump water heater in which bolt fixing parts of front end parts and rear end parts of leg parts can be engaged with bolts efficiently in a short time with light labor when installing a heat pump unit.SOLUTION: A heat pump water heater includes an outer packaging case incorporating a heat pump circuit in which a compressor, a condensation heat exchanger, expansion means and an evaporation heat exchanger are connected by a refrigerant circuit, and includes an air discharge port on the front surface of the outer packaging case, and it heats incoming water from a hot water storage tank by the heat pump circuit and stores it. The heat pump water heater comprises by arranging the compressor at a portion closer to one end part in the longitudinal direction in the outer packaging case. At a bottom part of a case member, a pair of left and right leg parts (52) is provided for fixing with anchor bolts (51) provided at base parts (50). At the leg part (52), a plurality of notch-like bolt fixing parts(54) are provided opening to one direction out of the left side and the right side.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a heat pump water heater, and more particularly to an improved structure of a fixing portion that fixes a leg portion of a case member that houses a heat pump circuit to a base portion with a bolt.

  It has a case member with a built-in heat pump circuit in which a compressor, a condensation heat exchanger, an expansion means, and an evaporative heat exchanger are connected by a refrigerant circuit, and has an air discharge port on the front surface of the case member. 2. Description of the Related Art Heat pump water heaters that heat incoming water with the heat pump circuit and store hot water are widely used in practice.

  In general, a blower, an evaporating heat exchanger, and the like are arranged at the left end portion or right end portion inside the case member and the central portion, and the compressor, the expansion means, and the like are close to one end portion in the left-right direction inside the case member. It arrange | positions in the site | part (right end side part or left end side part).

  7 to 9 relate to the prior art implemented by the applicant of the present application. FIG. 7 is a plan view of the heat pump unit 100 including a heat pump circuit and a case member. FIG. 8 is a left and right view fixed to the bottom of the case member 101. 9 is an enlarged plan view of one of the pair of leg portions 102, and FIG. 9 is a perspective view of the mounting base 103 constituting the base portion on which the heat pump unit 100 is installed.

As shown in FIG. 8, a bolt fixing portion 102 b composed of a notch opening rearward is formed at the rear end portion of the leg portion 102, and a bolt fixing portion consisting of a bolt hole is formed at the front end portion of the leg portion 102. 102a is formed. A pair of left and right leg portions 102 are fixed to the bottom portion of the case member 101, a bolt fixing portion 102a projects forward from the front end of the bottom portion of the case member 101, and a bolt fixing portion 102b extends rearward from the rear end of the bottom portion of the case member 101. It protrudes.
A pair of legs 102 of the heat pump unit 100 is placed on a pair of mounting tables 103, and bolt fixing portions 102a and 102b are fixed by four bolts (not shown) protruding from the mounting table 103. Yes.

  In the heat pump hot water supply device described in Patent Document 1, a synthetic resin cover or a rubber cover is applied to the front end portion and the rear end fixed portion of the leg portion fixed to the bottom portion of the case member of the heat pump unit. By covering the cover made of synthetic resin, safety is improved while reducing vibration and noise.

JP 2010-85043 A

  In the prior art shown in FIGS. 7 to 9, since the bolt fixing portion at the front end of the leg portion is a bolt fixing portion made of a bolt hole, when installing the heat pump unit, the heat pump unit that is a heavy object is raised, Two bolts must be inserted into the bolt holes of the bolt fixing portion, and the two rear bolts must be engaged with the notches of the bolt fixing portion.

In particular, the heat pump unit is heavy on the side where the compressor is built (for example, the right end side), so when the heat pump unit is lifted, the compressor side tends to be lowered. It is very difficult to pass through the hole.
In many cases, the installation table shown in FIG. 9 is adopted as the installation table. In this case, the bolt set on the installation table side is easy to move, so that the installation work of the heat pump unit becomes more difficult.

  A notch-shaped bolt fixing portion opened rearward is formed at the rear end portion of the leg portion of the heat pump unit of the heat pump water heater described in Patent Document 1, and the front end portion of the leg portion is opened forward. Since the notch-shaped bolt fixing portion is formed, if the anchor bolt is fixedly provided, the heat pump unit should be lifted and installed in the same manner as described above when installing the heat pump unit. Therefore, a lot of labor is required.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a heat pump hot water supply apparatus capable of efficiently engaging a bolt fixing portion of a front end portion and a rear end portion of a leg portion with a bolt in a short time with light labor when installing a heat pump unit. That is.

  The heat pump hot water supply apparatus of claim 1 has a case member including a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporating heat exchanger are connected by a refrigerant circuit, and an air exhaust is provided in front of the case member. A heat pump hot water supply apparatus that has an outlet and heats hot water stored in a hot water storage tank by the heat pump circuit to store the heat pump hot water, wherein the compressor is disposed near one end in the left-right direction inside the case member In the apparatus, the bottom of the case member is provided with a pair of left and right legs for fixing with anchor bolts provided on the base, and the legs are either left or right. A plurality of notch-shaped bolt fixing portions opened in the direction are provided.

  The heat pump hot-water supply apparatus according to claim 2 is the invention according to claim 1, wherein the opening of the notch-shaped bolt fixing part is the one end where the compressor is disposed with respect to the center in the left-right direction of the bolt fixing part. It is characterized by being formed on the opposite side.

  According to invention of Claim 1, it has a case member which incorporated the heat pump circuit, and has an air exhaust port in the front surface of this case member, and arrange | positions the said compressor to the one end part part of the left-right direction inside the said case member. In the heat pump water heater, the bottom of the case member is provided with a pair of left and right legs for fixing with anchor bolts provided on the base, and the legs are provided with left and right legs. Since there are provided a plurality of notch-shaped bolt fixing portions opened in any one of the directions, the following effects can be obtained.

When installing the heat pump unit including the heat pump circuit and the case member on the base part, the openings of the notch-shaped bolt fixing parts formed on the legs of the heat pump unit approach the multiple bolts of the base part. Or, by placing the heat pump unit on the base part so as to be incompletely engaged, and then pushing the heat pump unit slightly to the left or right, a plurality of bolts are attached to the plurality of bolt fixing parts. Can be engaged.
Therefore, it is possible to efficiently install the heat pump unit in a short time with light labor as compared with the conventional technology in which the heat pump unit is lifted as in the prior art and the bolt is inserted into the bolt hole.

According to invention of Claim 2, the opening part of the said notch-shaped bolt fixing | fixed part is formed in the opposite side to the said one end part side with which the said compressor is arrange | positioned with respect to the center of the left-right direction of a bolt fixing | fixed part. Therefore, the following effects are achieved.
When placing the heat pump unit on the base part, even if the heat pump unit is inclined so that the one end side is lowered because the compressor is heavy, the multiple bolt fixing parts approach the multiple bolts. Or since it is easy to engage incompletely, a some volt | bolt can be easily engaged with a some volt | bolt fixing | fixed part.

It is a schematic block diagram of the heat pump hot-water supply apparatus which concerns on the Example of this invention. It is a perspective view of a heat pump unit. It is a front view of a heat pump unit. It is a top view of a heat pump unit. It is a top view of a leg part. (A) is an operation explanatory diagram at the start of installation of the heat pump unit, (b) is an operation explanatory diagram when the heat pump unit is placed on the base part, (c) is a bolt fixing part which is bolted by moving the heat pump unit. It is operation | movement explanatory drawing of the state engaged with. FIG. 5 is a view corresponding to FIG. 4 according to the prior art. FIG. 6 is a view corresponding to FIG. 5 according to the prior art. It is a perspective view of the cradle which concerns on a prior art.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

First, the whole structure of the heat pump hot-water supply apparatus 1 of this invention is demonstrated.
As shown in FIG. 1, a heat pump hot water supply apparatus 1 includes a hot water storage tank unit 2 having a hot water storage tank 5 for storing hot water, a heat pump unit 3 for heating hot water in the hot water storage tank 5, and a control unit for controlling the heat pump hot water supply apparatus 1. 4. It consists of circulation pipes 8a and 8b for circulating hot water between the hot water storage tank unit 2 and the heat pump unit 3.

  As shown in FIG. 1, the hot water storage tank unit 2 includes a hot water storage tank 5, various pipes 6 and 7, circulation pipes 8a and 8b, a hot water circulation pump 11, an on-off valve 12, a mixing valve 13, a main control unit 16, an exterior. A case 17 and the like are provided. The hot water storage tank 5 stores high-temperature hot water (for example, 65 to 90 ° C.) heated by the heat pump unit 3.

  A water supply pipe 6 and a circulation pipe 8 a are connected to the lower end of the hot water storage tank 5. A circulation pipe 8b and a hot water discharge pipe 7 are connected to the upper end of the hot water storage tank 5, and hot hot water returned from the circulation pipe 8b is stored in the hot water storage tank 5. When hot water is supplied, the high temperature in the hot water storage tank 5 is stored. Hot water can be supplied to the hot water supply pipe 7.

  In the hot water storage tank 5, a plurality of temperature sensors 5 a to 5 d are arranged at predetermined intervals in the height direction, and temperature detection signals from the temperature sensors 5 a to 5 d are supplied to the main control unit 16. The exterior case 17 is formed in a box shape made of a thin steel plate, and includes a hot water storage tank 5, various pipes 6 and 7, a part of the circulation pipes 8 a and 8 b, a hot water circulation pump 11, an on-off valve 12, a mixing valve 13, and various types. The temperature sensors 15a to 15d and the main control unit 16 are accommodated.

Next, the heat pump unit 3 will be described.
As shown in FIG. 1, the heat pump unit 3 includes a heat pump heat source unit 20 for heating hot water with a refrigerant, an auxiliary control unit 33 connected to the main control unit 16 and controlling the heat pump type heat source unit 20, these Is provided with an outer case 35 (case member) and the like.

  The heat pump heat source machine 20 includes a compressor 21, a condensing heat exchanger 22 for heating hot water, an expansion valve 23 (expansion means) for rapidly expanding a high-pressure refrigerant to lower the temperature and pressure, and evaporative heat exchange for absorbing outside air heat. The device 24 is connected via a refrigerant pipe 25 to constitute a heat pump circuit, and a hot water storage operation is performed using the refrigerant sealed in the refrigerant pipe 25. The heat pump heat source machine 20 is also provided with a blower fan 27 for an evaporation heat exchanger driven by a blower motor 27a.

First, the structure of the outer case 35 will be described.
As shown in FIGS. 2 and 3, the exterior case 35 is formed in a box shape made of a thin steel plate, and includes a pair of left and right side plates 41, 42, a front side plate 43, a rear side plate 44, a top plate 45, And a bottom plate 46. The interior of the outer case 35 is partitioned into a blower chamber, a machine chamber, and a hot water supply / heating chamber by a plurality of partition plates. The plurality of partition plates have a vertical vertical partition plate and a horizontal horizontal partition plate, each of which is made of a thin steel plate.

  The interior of the outer case 35 is partitioned into a blower chamber and a machine chamber via a vertical partition plate, and the blower chamber is formed in a left end portion and a central portion in the outer case 35, and the blower fan 27 and the like are provided in the blower chamber. Is arranged. The machine room is formed near the right end of the outer case 35. The machine room is equipped with a compressor 21, an expansion valve 23, and piping as indicated by a symbol M in FIG. A hot water supply heating chamber is formed at the upper end side portion in the exterior case 35 via a horizontal partition plate, and the condensation heat exchanger 22 is disposed in this hot water supply heating chamber.

  An air discharge port 43a is formed in the front side plate 43 (the front surface of the exterior case 35), and a wire net-like cover member 43b is provided on the front surface of the air discharge port 43a. On the inner surface side of the front side plate 43, a bell mouth 43c for guiding the air flow is provided. When the blower fan 27 is driven, outside air is taken in from the outside air intake openings formed in the left side plate 41 and the rear side plate 44, respectively, and heat is exchanged with the refrigerant in the evaporating heat exchanger 24 to become low-temperature air. It is discharged to the outside through the air discharge port 43a.

Next, various devices of the heat pump unit 3 (various devices in the outer case 35) will be described.
The compressor 21 is a known hermetic compressor that adiabatically compresses a refrigerant in a gas phase state to increase the temperature. The condensing heat exchanger 22 is configured by a double pipe having a heat exchanger passage portion 22 a installed between the circulation pipes 8 a and 8 b and an internal passage 22 b that is a part of the refrigerant pipe 25. In the condensation heat exchanger 22, heat is exchanged between the refrigerant flowing in the internal passage 22b and hot water supplied from the circulation pipe 8a to the heat exchanger passage portion 22a, and the hot water is heated and the refrigerant is cooled and liquefied.

  The expansion valve 23 adiabatically expands the refrigerant in the liquid phase and lowers the temperature. The expansion valve 23 is a control valve having a variable throttle amount. However, an expansion valve with a constant throttle amount may be employed.

  The evaporation heat exchanger 24 includes an evaporator passage portion 24a included in the refrigerant pipe 25, and the evaporator passage portion 24a includes a heat transfer tube and a plurality of fins. In the evaporative heat exchanger 24, heat is exchanged between the refrigerant flowing through the evaporator passage portion 24a and the outside air, and the refrigerant absorbs heat from the outside air and vaporizes. The evaporative heat exchanger 24 is configured in an L shape in plan view so as to follow the inner surfaces of the left side plate 41 and the rear side plate 44.

  The refrigerant pipe 25 includes a refrigerant passage 25 a that connects the discharge side of the compressor 21 and the inlet side of the condensation heat exchanger 22, and a refrigerant passage 25 b that connects the outlet side of the condensation heat exchanger 22 and the inlet side of the expansion valve 23. , A refrigerant passage 25c that connects the outlet side of the expansion valve 23 and the inlet side of the evaporation heat exchanger 24, and a refrigerant passage 25d that connects the outlet side of the evaporation heat exchanger 24 and the introduction side of the compressor 21 are provided. .

  As shown in FIG. 1, the blower fan 27 has a blower motor 27a and a plurality of blade members that are rotationally driven by the blower motor 27a, and is supported by the bottom plate 46 and the horizontal partition plate via a support fitting. Has been.

  During the hot water storage operation of the heat pump heat source device 20, the heated refrigerant compressed to a high pressure by the compressor 21 is sent to the condensation heat exchanger 22, and is circulated from the lower end of the hot water storage tank 5 by driving the hot water circulation pump 11. Heat is exchanged with water flowing into the heat exchanger passage 22a through the pipe 8a to warm the water, and the liquefied refrigerant is cooled down to the expansion valve 23. The heated hot water passes through the circulation pipe 8b. Then, the hot water is stored in the hot water storage tank 5 of the hot water storage tank unit 2, and hot water is stored in the hot water storage tank 5 by repeating the heating operation via the heat pump heat source unit 20.

Next, the control unit 4 will be described.
As shown in FIG. 1, the heat pump hot water supply apparatus 1 is controlled by a control unit 4 including a main control unit 16 and an auxiliary control unit 33. Detection signals from various temperature sensors and the like are transmitted to the control unit 4, and the control unit 4 operates the hot water storage tank unit 2 and the heat pump heat source machine 20, activates / deactivates the pump, switches various valve open / close states, and Controls the opening adjustment, etc., and executes various operations (hot water storage operation, hot water supply operation, etc.).

  The main control unit 16 can perform data communication with the operation remote controller 36 that can be operated by the user. When the target hot water temperature is set by operating the switch of the operation remote controller 36, the target hot water temperature data is transferred from the operation remote controller 36. It is transmitted to the main control unit 16. The auxiliary control unit 33 is capable of data communication with the main control unit 16, and in accordance with instructions from the main control unit 16, various devices of the heat pump heat source unit 20 (compressor 21, expansion valve 23, blower motor 27a, etc.). The drive control is performed.

Next, the anchor structure peculiar to the present application for fixing the heat pump unit 3 to the base portion 50 will be described with reference to FIGS.
On the lower surface of the bottom plate 46 (bottom portion) of the outer case 35 are a pair of left and right leg portions 52 for fixing with anchor bolts 51 (see FIG. 6) provided on the base portion 50, and a pair elongated in the front-rear direction. The leg portion 52 is fixed. The left leg 52 is disposed in the front-rear direction so as to support a portion near the left end of the outer case 35, and the right leg 52 is disposed in the front-rear direction so as to support a portion near the right end of the outer case 35. Yes. The foundation part 50 of the present embodiment is composed of a stationary table similar to the stationary table 103 shown in FIG.

  The leg portion 52 is manufactured by stamping and pressing a thin steel plate. The leg portion 52 has an elongated rectangular outer shape at the front and rear, and an oval engagement convex portion 53 that slightly protrudes upward at the front and rear portions. The leg portions 52 are fixed to the bottom plate 46 by being screwed or spot welded in a state in which these engagement convex portions 53 are engaged with the engagement concave portions of the bottom plate 46.

  As shown in FIG. 4 and FIG. 5, a pair of legs 52 are opened at the front end and the rear end of the leg 52 toward one of the left side and the right side (left side in this embodiment). A notch-shaped bolt fixing portion 54 is provided. The opening 54 a of the notch-shaped bolt fixing portion 54 is opposite to the one end side (the right end portion side in this embodiment) on which the compressor 21 is disposed with respect to the center in the left-right direction of the bolt fixing portion 54 ( That is, it is formed on the left side). The bolt fixing portion 54 is configured by a U-shaped notch portion into which the bolt 51 that is vertically protruded by engaging the bolt head portion 51a with the groove portion 50a (see FIG. 6) of the base portion 50 can be introduced. Yes.

  As shown in FIGS. 3 and 4, each leg portion 52 is placed on the upper surface of the base portion 50 over its entire length, and the front bolt fixing portion 54 projects forward from the front end of the bottom plate 46, The bolt fixing portion 54 protrudes rearward from the rear end of the bottom plate 46, and in the state where the bolt fixing portion 54 is engaged with the bolt 51 from the right side, the nut 51 b screwed to the bolt 51 is fastened to thereby fix the leg portion. Bolt fixing portions 54 at both front and rear ends of 52 are fixed to the base portion 50. However, the bolt 51 and the nut 51b are not shown in FIG.

  Next, the operation and effect of the anchor structure of the heat pump unit 3 will be described. First, when the heat pump unit 3 is installed on the base portion 50, the heat pump unit 3 is manually lifted up and installed. At this time, as shown in FIG. 6A, the heat pump unit 3 tends to be inclined so that the right side portion of the heat pump unit 3 equipped with the heavy compressor 21 is lower than the left side portion.

  In the inclined state, the heat pump unit 3 is brought close to the base portion 50, and as shown in FIG. 6B, a pair of notch-shaped bolt fixing portions 54 formed in the respective leg portions 52 of the heat pump unit 3. The heat pump unit 3 is placed on the base portion 50 so that the opening 54a is closely opposed to or incompletely engaged with the pair of bolts 51 from the right side. Next, as shown in FIG. 6C, the heat pump unit 3 is slightly pushed leftward so that the bolt 51 is completely engaged with the bolt fixing portion 54, and then the nut 51b is attached to each bolt 51. The leg part 52 is fixed to the base part 50 by fastening. Thus, the heat pump unit 3 can be installed and fixed efficiently in a short time with light labor.

  In addition, since the opening 54a of the notch-shaped bolt fixing portion 54 opens leftward, the opening 54a faces in a direction perpendicular to the groove portion 50a in which the bolt head portion 51a of the base portion 50 is set. Since it is open, when the heat pump unit 3 is pushed slightly to the left, the bolt 51 does not move in the left-right direction, and therefore, the work of completely engaging the bolt 51 with the bolt fixing portion 54 can be easily performed. it can.

  The opening 54a of the notch-shaped bolt fixing portion 54 is opposite to the one end portion side (right side in the present embodiment) where the compressor 21 is disposed with respect to the center of the bolt fixing portion 54 in the left-right direction (that is, right side). Since the compressor 21 is heavy when the heat pump unit 3 is placed on the base portion 50, the heat pump unit 3 is inclined so that the one end side is lowered. In addition, since it is easy to make the bolt fixing portion 54 closely approach or incompletely engage with the bolt 51, the four bolts 51 can be easily and efficiently engaged with the four bolt fixing portions 54. .

Next, an example in which the above embodiment is partially changed will be described.
1) In the heat pump unit, when the compressor is arranged near the left end in the exterior case, the left side portion of the heat pump unit becomes heavy, so that a notch-shaped bolt fixing portion opened toward the right side is provided. And

2) In the anchor structure of the heat pump unit, the structure of the base part is not limited to that of the above-described embodiment, and base parts having various structures can be adopted.
3) The structure for fixing the leg portion to the bottom plate is not limited to that of the above-described embodiment, and can be fixed to the bottom plate by various means.

4) You may comprise the said leg part by two members which consist of a front side leg part and a rear side leg part.
5) The legs are not limited to thin steel plates, and synthetic resin legs may be used.
6) In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications.

DESCRIPTION OF SYMBOLS 1 Heat pump hot-water supply apparatus 2 Hot water storage tank unit 3 Heat pump unit 5 Hot water storage tank 21 Compressor 22 Condensing heat exchanger 23 Expansion valve 24 Evaporative heat exchanger 35 Exterior case (case member)
43a Air outlet 50 Base part 51 Anchor bolt 52 Leg part 54 Bolt fixing part 54a Opening part

Claims (2)

It has a case member with a built-in heat pump circuit in which a compressor, a condensation heat exchanger, an expansion means, and an evaporative heat exchanger are connected by a refrigerant circuit, and has an air discharge port on the front surface of the case member. A heat pump hot water supply apparatus for storing hot water by heating the incoming water with the heat pump circuit, wherein the compressor is disposed at a position near one end in the left-right direction inside the case member,
At the bottom of the case member, a pair of left and right legs for fixing with anchor bolts provided on the base is provided,
The heat pump hot water supply apparatus, wherein the leg portion is provided with a plurality of notch-shaped bolt fixing portions that are open toward one of the left side and the right side.   The opening of the notch-shaped bolt fixing part is formed on the side opposite to the one end side where the compressor is disposed with respect to the center in the left-right direction of the bolt fixing part. The heat pump hot water supply apparatus according to 1.