JP2002048396A - Hot water supply unit of heat pump hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize effective utilization of the inner space of a unit case in a hot water supply unit. SOLUTION: In the hot water supply unit 12 of a heat pump hot water supply apparatus comprising a hot water supply tank 26, a heat exchanger for hot water supply and a heat exchanger 28 for bathtub wherein water is heated in the heat exchanger for hot water supply by the heat of refrigerant from a heat pump unit, hot water is stored in the hot water supply tank which can supply hot water to faucets and a bathtub, and hot water in the bathtub is heated in the heat exchanger for bathtub by the heat of refrigerant from the heat pump unit and can be heat insulated, the heat exchanger for bathtub is constructed to have a serpentine structure and disposed along the wall face (one side face 73) in the unit case 70 of the hot water supply unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to heat water by the heat of a refrigerant to supply hot water, and to heat (reheat) hot water in a bathtub by the heat of the refrigerant to maintain a suitable temperature. The present invention relates to a hot water supply unit of a heat pump water heater.

[0002]

2. Description of the Related Art In a conventional hot water supply apparatus, water is heated by a refrigerant heat of a refrigerant through a hot water supply heat exchanger to store hot water in a hot water supply tank, and this hot water can be supplied to a faucet and a bathtub. There has been proposed a heat pump type hot water supply apparatus having a function of heating (reheating) hot water in a bathtub by the heat of the refrigerant through a heat exchanger for the bathtub to keep the temperature at an appropriate temperature.

[0003]

In the above-described hot water supply apparatus, the heat exchanger for hot water supply and the heat exchanger for bath tub are both coil-shaped in a refrigerant pipe through which a refrigerant flows and a water pipe through which hot water (water) flows. In general, these pipes are arranged coaxially and alternately contacted with each other. Therefore, these heat exchangers require a large installation space,
In order to install two heat exchangers in a unit case accommodating a large-capacity hot water supply tank, considerable care must be taken in the layout in the unit case.

An object of the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a hot water supply unit of a heat pump type hot water supply apparatus capable of realizing effective use of space in a unit case in a hot water supply unit.

[0005]

According to the first aspect of the present invention, there is provided a heat pump unit including a hot water supply tank, a hot water supply heat exchanger, a bath tub heat exchanger, and a compressor and a heat pump type heat exchanger. With the heat of the refrigerant, water is heated by the heat exchanger for hot water supply, hot water is stored in the hot water supply tank, hot water can be supplied from the hot water supply tank to the faucet and the bathtub, and the heat of the refrigerant from the heat pump unit is used. In the hot water supply unit of the heat pump type hot water supply device in which the hot water in the bath tub is heated by the heat exchanger for the bath tub and can be kept warm, at least one of the heat exchanger for the bath tub and the heat exchanger for the hot water supply has a serpentine structure. And being arranged along the wall surface in the unit case of the hot water supply unit.

According to a second aspect of the present invention, in the first aspect, at least one of the bath tub heat exchanger and the hot water supply heat exchanger is disposed in contact with a hot water supply tank. It is a feature.

The first aspect of the invention has the following operation.

Since at least one of the bath heat exchanger and the hot water supply heat exchanger has a serpentine structure, the installation space for the heat exchanger can be reduced.

Further, since the heat exchanger for bathtub and the heat exchanger for hot water supply having the serpentine structure are arranged along the wall surface of the tank case in the tank case for housing the hot water supply tank, The narrow space in the case can be used effectively.

The invention according to claim 2 has the following operation.

Since at least one of the bathtub heat exchanger and the hot water supply heat exchanger is disposed in contact with the hot water supply tank,
Since these heat exchangers can heat water (or hot water) using not only the heat of the refrigerant but also the heat of the hot water supply tank, the heat exchange efficiency can be improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a heat pump type hot water supply apparatus to which an embodiment of a heat pump type hot water supply apparatus according to the present invention is applied, and is a circuit diagram when heating water in a hot water supply tank and storing hot water. It is.

As shown in FIG. 1, a heat pump type hot water supply apparatus 10 includes a heat pump unit 11, a hot water supply unit 12, a faucet 13, a bathtub 14, and a control device 15. The control device 15 is a heat pump unit. 11 and the hot water supply unit 12 are controlled.

The heat pump unit 11 includes the compressor 1
6. Accumulator 17 and heat pump heat exchanger 18
Are sequentially arranged in the refrigerant pipe 19 to constitute a part of the refrigerant circuit. The discharge side end of the compressor 16 in the refrigerant pipe 19 is connected to the gas pipe 21 of the inter-unit pipe 20. Further, the end of the refrigerant pipe 19 on the heat pump heat exchanger 18 side is connected to the liquid pipe 22 of the inter-unit pipe 20.

In the refrigerant pipe 19, the discharge side of the compressor 16 and the heat pump heat exchanger 18 side are connected by a bypass pipe 24 provided with an electromagnetic valve 23, so that an excessively high pressure of the discharged refrigerant is released. A blower fan 25 is installed near the heat pump heat exchanger 18 to blow air to the heat pump heat exchanger 18.

The hot water supply unit 12 includes a hot water tank 2
6. Heat exchanger 27 for hot water supply and heat exchanger 28 for bathtub.

The hot water supply heat exchanger 27 is provided in a refrigerant pipe 29 having a first switching valve 31. The end of the refrigerant pipe 29 on the first switching valve 31 side is connected to the gas side joint 30.
Is connected to the gas pipe 21 of the pipe 20 between the units. Further, the other end of the refrigerant pipe 29 is connected to the liquid pipe 22 of the inter-unit pipe 20 via a liquid side joint 33. Thus, the hot water supply heat exchanger 27 is connected to a part of the refrigerant circuit of the heat pump unit 11, and
, A refrigerant circuit in which the refrigerant circulates is configured.

The hot water supply heat exchanger 27 and the hot water supply tank 26 are connected in a loop by a hot water supply pipe 36 provided with a circulation pump 34 for hot water supply and a flow control valve 35, and are indicated by a thick line M in FIG. The hot water supply circulation circuit 52 is configured.

A pressure reducing check valve 37 is provided at the bottom of the hot water supply tank 26.
Is connected, so that tap water can always be supplied into the hot water supply tank 26. That is, the tap water pressure always acts in the hot water supply tank 26. A hot water supply pipe 40 provided with a hot water supply solenoid valve 39 is connected to a top portion of the hot water supply tank 26.

When the water at the bottom of the hot water supply tank 26 is supplied to the hot water supply heat exchanger 27 by the operation of the hot water supply circulation pump 34, the hot water supply heat exchanger 27 converts the supplied water into a heat pump unit. The compressor 16 is heated by the refrigerant gas discharged from the compressor 16. The heated water (hot water) is guided to the top of the hot water supply tank 26 via the flow control valve 35, so that hot water at about 60 ° C. can be stored in the hot water supply tank 26, for example.

An electric heater 41 is provided in the hot water supply tank 26. The electric heater 41 raises the temperature of hot water in the hot water supply tank 26 to, for example, about 80 ° C. A drain cock 42 is provided in the hot water supply pipe 36 on the upstream side of the hot water supply circulation pump 34, so that hot water or water in the hot water supply pipe 36 and the hot water supply tank 26 can be drained through the drain pan 43. . Further, a relief means 44 is provided in the hot water supply pipe 36 on the upstream side of the hot water supply tank 26 so that the pressure when the water is excessively heated by the hot water supply heat exchanger 27 can be released.

The bathtub heat exchanger 28 is disposed in a refrigerant pipe 45 provided with a second switching valve 32, as shown in FIG. The end of the refrigerant pipe 45 on the second switching valve 32 side is connected to a point A in the refrigerant pipe 29 near the gas side joint 30. The other end of the refrigerant pipe 45 is connected to the refrigerant pipe 29 in the vicinity of the liquid-side joint 33.
Connected to a point. The second switching valve 32 and the first switching valve 31 are configured so that when one is opened, the other is closed.

Therefore, when the second switching valve 32 is opened, the bathtub heat exchanger 28 is connected to a part of the refrigerant circuit of the heat pump unit 11, and as shown by a thick line N in FIG.
A refrigerant circuit in which the refrigerant circulates is configured.

The bathtub heat exchanger 28 and the bathtub 14 are connected in a loop by a first bathtub piping 51 having a bathtub circulation pump 46, a filter 47, a water level sensor 48, a thermistor 49 and a flow switch 50. FIG. 4
A bathtub circulation circuit 53 indicated by a thick line O of FIG. First
A bypass pipe 55 having a bypass solenoid valve 54 is connected to the bathtub pipe 51 on the downstream side of the bathtub circulation pump 46.

The bathtub heat exchanger 28 includes a bathtub 1 as described later.
When hot water is supplied to the bathtub 4 and hot water is filled in the bathtub 14, the hot water in the bathtub 14 is heated by the refrigerant gas discharged from the compressor 16 of the heat pump unit 11 by the operation of the bathtub circulation pump 46, and the hot water is added. Carry out baking, bathtub 14
Keep the hot water inside.

Since the water level sensor 48 communicates with the bathtub 14 via the first bathtub piping 51, the water level sensor 48 detects the level of hot water in the bathtub 14. When hot water is circulating in the bathtub circulation circuit 53, the thermistor 49 detects the hot water temperature and indirectly detects the hot water temperature in the bathtub 14. The flow switch 50 detects that hot water is circulating in the bathtub circulation circuit 53. Furthermore,
The filter 47 includes a filter 56 disposed in the bathtub 14.
At the same time, the hot water is filtered.

As shown in FIG. 2, the faucet 13 is provided with a hot water supply pipe 59 provided with a mixing control valve 57 and a flow sensor 58.
And the hot water supply pipe 40 is connected to the hot water supply tank 26 as shown by the thick line P in FIG. Furthermore, this faucet 13
It is also connected to a second tap water pipe 60 provided with a pressure reducing check valve 61. The flow sensor 58 detects the amount of hot water flowing in the hot water supply pipe 59.

A first tap water pipe 38 is provided in the hot water supply tank 26.
The tap water pressure is always working via the
By opening the hot water tap 3, hot water in the hot water supply tank 26 is supplied to the faucet 13 via the hot water supply pipe 40 and the hot water supply pipe 59. The hot water from the faucet 13 is mixed with the tap water from the second tap water pipe 60 by opening the tap water faucet of the faucet 13, and can be supplied from the faucet 13.

The mixing control valve 57 is provided with a tap water solenoid valve 6.
As shown by the thick broken line Q in FIG. 2, the pressure reducing check valve 37 of the first
Connected downstream. Therefore, at the time of opening operation of the tapping solenoid valve 39 and the tap water solenoid valve 62, the hot water from the hot water supply tank 26 and the tap water pipe 40 and the tap water from the third tap water pipe 63 are controlled by controlling the opening degree of the mixing control valve 57. Is mixed with
The temperature of hot water supplied from the hot water tap of the faucet 13 is, for example, 42 ° C.
It is adjusted to.

As shown in FIG. 3, the downstream side of the flow sensor 58 in the hot water supply pipe 59 and the tub circulation pump 46 and the flow switch 50 in the first bathtub pipe 51 are connected by a second bathtub pipe 68. You. The second bathtub piping 68 has a flow sensor 6 from the hot water supply piping 59 side.
4. Electromagnetic valve 65 for pouring, relief means 66, check valve 67
Are sequentially arranged.

Here, the flow sensor 64 detects the amount of hot water flowing in the second bathtub piping 68. Further, the relief means 66 and the check valve 67 release pressure when excessively heated hot water flows in the second bathtub piping 68.

When the pouring solenoid valve 65 and the bypass solenoid valve 54 are opened with the bathtub circulation pump 46 stopped, the hot water in the hot water supply tank 26 is discharged as shown by a thick line R in FIG. 40, a part of the hot water supply pipe 59 and the second bathtub pipe 68 to flow into the first bathtub pipe 51. The first bathtub pipe 51 is branched into two branches, one of which is a flow switch 50 and a thermistor. The molten metal is poured into the bath 14 via the water level sensor 49 and the filter 47, and into the bath 14 via the bypass pipe 55. By pouring the hot water into the bathtub 14 from the two directions in the first bathtub piping 51, the hot water can be filled in the bathtub 14 in a short time.

When the water level sensor 48 detects that an appropriate amount of hot water has been poured into the bathtub 14 from the hot water supply tank 26, the pouring solenoid valve 65 and the bypass solenoid valve 54 are closed. Thereafter, when the thermistor 49 detects that the temperature of the hot water in the bathtub 14 has fallen below the appropriate temperature, the bathtub circulation pump 46 is operated, the second switching valve 32 is opened, and the compressor of the heat pump unit 11 is opened. 16 is activated, and the hot water circulating in the bathtub circulation circuit 53 by the operation of the bathtub circulation pump 46 is heated (reheated) by the refrigerant heat of the bathtub heat exchanger 28, and the hot water in the bathtub 14 is heated. It is kept warm.

As described above, the hot water supply tank 26 to the bathtub 14
An operation of supplying an appropriate amount of hot-water at a suitable temperature, and then heating (reheating) the hot water in the bathtub 14 to a suitable temperature by the bathtub heat exchanger 28 for a predetermined period of time to maintain the temperature is referred to as automatic bathtub operation.

The control device 15 controls the operation (including capacity control) and stop of the compressor 16 in the heat pump unit 11, the opening and closing of the solenoid valve 23, and the switching between the first switching valve 31 and the second switching valve 32 in the hot water supply unit 12. Operation or stop of the hot water supply circulation pump 34 and the bathtub circulation pump 46, the hot water supply solenoid valve 39, the bypass solenoid valve 54, and the tap water solenoid valve 6.
The heat pump unit 11 and the hot water supply unit 12 are controlled by controlling the opening and closing of the solenoid valve 2 and the pouring solenoid valve 65, the opening degrees of the flow control valve 35 and the mixing control valve 57, and the energization of the electric heater 41, respectively.

By the way, the hot water supply unit 12 shown in FIG.
As shown schematically in FIG. 5, a hot water supply tank 26 and a bathtub heat exchanger 28 are housed in a unit case 70,
Although not shown in FIG. 5, the unit case 70 further includes a hot water supply heat exchanger 27, a hot water supply circulation pump 34, a bathtub circulation pump 46, a first tap water pipe 38, a hot water supply pipe 59, and a refrigerant pipe 29. Pipes (hot water supply pipe 36, hot water supply pipe 40, refrigerant pipe 45, first bathtub pipe 51, third tap water pipe 63, second bathtub pipe 68, etc.) are housed and configured.

As shown in FIG. 6, the bathtub heat exchanger 28 is formed as a part of a pipe and provided in a serpentine structure. That is,
In the bathtub heat exchanger 28, the refrigerant pipe 71 alternately bends and turns left and right plural times, and the refrigerant pipe 71 is included therein, and the hot water pipe 72 similarly turns and turns alternately right and left plural turns. It is configured.

In the refrigerant pipe 71, the refrigerant flows into the upper end 71A and flows out from the lower end 71B. Also, in the hot water pipe 72, hot water (or water) flows into the lower end 72B and flows out from the upper end 72A. The hot water is heated (refired) by the heat of the refrigerant flowing in the refrigerant pipe 71 while flowing in the hot water pipe 72 of the bathtub heat exchanger 28 from the lower end 72B to the upper end 72A. Thereby, the hot water in the bathtub 14 is kept at an appropriate temperature.

As shown in FIG. 5, the bath heat exchanger 28 having the serpentine structure is arranged in the unit case 70 along one side surface 73 as a wall surface of the unit case 70. Furthermore, the bathtub heat exchanger 28 is disposed in contact with the outer wall surface of the hot water supply tank 26. The above-mentioned number of turns of the bathtub heat exchanger 28 is as follows:
The setting is made according to the heat exchange capacity of the bathtub heat exchanger 28.

Therefore, according to the above embodiment, the following effects are obtained.

Since the bathtub heat exchanger 28 has a serpentine structure, the installation space for the bathtub heat exchanger 28 can be reduced.

A heat exchanger 28 for a bathtub having a serpentine structure is provided within a unit case 70 for housing the hot water supply tank 26, on one side surface 73 of the unit case 70.
, The narrow space in the unit case 70 can be effectively used.

Since the bathtub heat exchanger 28 is disposed in contact with the hot water supply tank 26, the bathtub heat exchanger 28
Can heat water or hot water by utilizing not only the heat of the refrigerant but also the heat of the hot water supply tank 26.
8 can improve the heat exchange efficiency.

Although the present invention has been described based on the above embodiment, the present invention is not limited to this.

For example, in the above-described embodiment, the case where the bathtub heat exchanger 28 is in contact with the outer wall surface of the hot water supply tank 26 has been described.

Further, in the above embodiment, the case where the bathtub heat exchanger 28 is disposed along one side surface 73 in the unit case 70 has been described.
May be arranged along the top surface 74 or the bottom surface 75.

Further, in the above embodiment, the bath heat exchanger 28 has a serpentine structure. However, the hot water supply heat exchanger 27 has a serpentine structure, and It may be arranged along the side surface 73, the top surface 74, or the bottom surface 75.

[0049]

As described above, according to the hot water supply unit of the heat pump type hot water supply apparatus according to the present invention, the hot water supply tank, the hot water supply heat exchanger and the bathtub heat exchanger are provided, and the compressor and the heat pump heat exchanger are provided. Water is heated by the hot water supply heat exchanger by the heat of the refrigerant from the heat pump unit provided, hot water is stored in the hot water supply tank, and hot water can be supplied from the hot water supply tank to a faucet and a bathtub. In the hot water supply unit of the heat pump type water heater in which the hot water in the bath tub is heated by the heat exchanger for the bath by the heat of the refrigerant from the unit and can be kept warm, the heat exchanger for the bath tub and the heat exchanger for the hot water supply At least one of the hot water supply units has a serpentine structure and is disposed along the wall surface in the unit case of the hot water supply unit. It can realize the effective use of space in the unit case in Tsu door.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a heat pump hot water supply apparatus to which an embodiment of a heat pump hot water supply apparatus according to the present invention is applied, in which water in a hot water supply tank is heated and hot water is stored. .

FIG. 2 is a circuit diagram when hot water is supplied from a faucet in the heat pump type hot water supply apparatus of FIG.

FIG. 3 is a circuit diagram when hot water is supplied to a bathtub in the heat pump hot water supply device of FIG.

FIG. 4 is a circuit diagram when the hot water in the bathtub is heated (reheated) to keep the temperature in the heat pump hot water supply apparatus of FIG. 1;

5 schematically shows the hot water supply unit of FIG. 1, (A) shows a front sectional view, and (B) is a sectional view taken along line VV of FIG. 5 (A).

FIG. 6 is a front view showing the bathtub heat exchanger of FIGS. 1 and 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat pump type hot water supply apparatus 11 Heat pump unit 12 Hot water supply unit 13 Faucet 14 Bathtub 16 Compressor 18 Heat pump heat exchanger 26 Hot water supply tank 27 Heat exchanger for hot water supply 28 Heat exchanger for bathtub 70 Unit case 71 Refrigerant pipe 72 Hot water pipe 73 One side (Wall) 74 Top (wall) 75 Bottom (wall)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinori Toya 1 Otsuki-cho, Ashikaga, Tochigi Prefecture Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Kensuke Matsumoto 1 Otsuki-cho, Ashikaga, Tochigi Prefecture Sanyo Electric Air Conditioning (72) Inventor Kiyoshi Koyama 1 Otsukicho, Ashikaga, Tochigi Prefecture Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Hideaki Mukada 1 Otsukicho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Yoshihiro Takizawa 1 Otsuki-cho, Ashikaga-shi, Tochigi Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Hideyuki Takayama 1-Otsuki-cho, Ashikaga, Tochigi Sanyo Electric Air Conditioning Co., Ltd. No. 1 Otsukicho, Sanyo Electric Air Conditioning Co., Ltd.

Claims (2)

[Claims] 1. A heat pump unit comprising a hot water supply tank, a heat exchanger for hot water supply and a heat exchanger for a bath tub, and heat generated by a heat pump unit comprising a compressor and a heat pump heat exchanger. Hot water is stored in the hot water supply tank, and hot water can be supplied from the hot water supply tank to the faucet and the bathtub, and the hot water in the bathtub is heated by the heat exchanger for the bathtub by the heat of the refrigerant from the heat pump unit. In the hot water supply unit of the heat pump type hot water supply device that can be kept warm, at least one of the bathtub heat exchanger and the hot water supply heat exchanger is configured in a serpentine structure, and in a unit case of the hot water supply unit. A hot water supply unit for a heat pump hot water supply device, wherein the hot water supply unit is arranged along a wall surface. 2. The hot water supply unit of a heat pump hot water supply apparatus according to claim 1, wherein at least one of the bathtub heat exchanger and the hot water supply heat exchanger is disposed in contact with a hot water supply tank.