JPS61165550A - Engine drie heat pump type hot water supply device - Google Patents

Abstract

PURPOSE:To improve the conveying property of the device, to elevate freedom of installation and to prolong the life of the device by dividing the device into three units, that is, a first unit including an engine and a compressor, a second unit including both heat exchangers, and a third unit including a hot water storage tank. CONSTITUTION:An engine 1 and a compressor 2 constitutes a first unit 1, which is accommodated in a box body 20. A sound absorbing material 21 is provided in the inner surface of the box 20. In addition to the sound absorbing material, a heat exchanger 10 affixed to a slilencer 9, a cooling water pump 11, starting motor 14, a suction silencer 19 and the like are assembled therein. A coolant circulating system air heat exchanger 5 (evaporator) and hot water heat exchanger 3 (condenser) constitute a second unit II, which is accommodated into a box body 22. The air heat exchanger 5 and the hot water heat exchanger 3 are sectioned by a partitioning wall 22a. In addition, zero governor 7a, a heat exchanger 12 of a hot water circulating path, a cistern tank 13, and exhaust silencer 23 and thelike are accomodated therein. Further, a storae tank 15 constitutes a third unit III which is provided ndipendently from the first unit I and the second unit II.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat pump water heater driven by an engine.

[Prior art]

Engine-driven heat pump water heaters compress refrigerant using a compressor driven by an engine.1. The refrigerant is forcibly circulated through a circulation system having a heat exchanger consisting of a condenser and a heat exchanger consisting of an evaporator, and the water is heated by the heat exchanger of the condenser and stored in a hot water storage tank. There is.

As described above, the engine-driven heat pump type water heater is constructed of a large number of devices, so it is heavy and difficult to transport by a small number of people. In addition, there is a problem that the external size is large and there is a lack of freedom in installation, making it extremely difficult to install it in a relatively narrow space such as a general residence.

Furthermore, since component devices with different lifespans are grouped together, the overall product lifespan may be shortened. In particular, heat exchangers such as evaporators generate a humid atmosphere, which results in accelerated corrosion of the hot water storage tank, which not only shortens its lifespan, but also reduces its heat retention effect.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine-driven heat pump water heater that can improve the portability of the device, increase the degree of freedom in installation, and particularly extend the life of the device.

[Structure of the invention]

To achieve the above object, the present invention drives a compressor by an engine, and forces the refrigerant compressed by the compressor into a circulation system having a heat exchanger consisting of a condenser and an evaporator, and In a heat pump type hot water supply system in which water is heated by a heat exchanger of a condenser and stored in a hot water storage tank, the water supply system is equipped with a first water heater including the engine and a compressor.
A second unit including the reheat exchanger, and a third unit including the hot water tank.

〔Example〕

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

In FIG. 1, l is an engine that is operated using household gas such as city gas or propane gas as fuel. Compressor 2
is driven by this engine 1. The compressor 2 compresses a refrigerant such as fluorocarbon, and sequentially circulates the compressed refrigerant through a hot water heat exchanger 3 consisting of a condenser, an expansion valve 4, and an air heat exchanger 5 consisting of an evaporator equipped with a fan 6. In this circulation circuit, the refrigerant is compressed by the compressor 2 to become a high-pressure gas, first condensed and liquefied in the hot water heat exchanger 3, and radiates the heat of condensation. Next, the liquefied refrigerant expands in the expansion valve 4 and becomes a low-pressure, low-temperature refrigerant that is partially gasified.Then, in the air heat exchanger 5, it absorbs heat from the outside air forcedly blown by the fan 6 and becomes gasified. do. The gasified refrigerant returns to the compressor 2 again, and the above cycle is repeated thereafter.

A mixture of fuel gas and air generated in the mixture a7a is taken into the engine 1 via the intake pipe 7. The air mixture passes through the intake silencer 19 to the mixer 7a,
Further, fuel gas is generated by being supplied to the mixer 7a from the zero gas pipe 30 through the gas pipe 31, respectively.

Furthermore, the exhaust gas after combustion in the engine 1 is exhausted into the atmosphere from an exhaust pipe 8 through a muffler 9.

This muffler 9 is attached with a heat exchanger 10 using a water jacket. Further, cooling water is circulated through the cooling jacket 1a provided in the engine 1 by a cooling water pump 11. The cooling water that has taken heat from the engine 1 radiates heat in a heat exchanger 12 provided in its circulation path. 13 is a stern tank, and 14 is a starting motor.

15 is a hot water storage tank. A water supply pipe 1 is connected to the hot water storage tank 15.
New water is supplied from 7, and heated hot water is dispensed from hot water pipe 18. The water in this hot water storage tank 15 is
The hot water pump 16 circulates the hot water through the hot water heat exchanger 3 and the heat exchanger 12°lO, respectively, to heat the hot water and store it in the hot water storage tank 15 again.

In the heat pump water heater described above, the engine 1 and the compressor 2 constitute a first unit (2), which is housed in a box 20 as shown in FIG.

A sound absorbing material 21 is provided on the inner surface of the box body 20. This box body 20 includes the engine 1. In addition to the compressor 2, there is a heat exchanger 10 attached to the silencer 9, a cooling water pump 11. Starting motor 14. An intake silencer 19 and the like are incorporated.

Furthermore, the air heat exchanger 5 (evaporator) and hot water heat exchanger 3 (condenser) of the refrigerant circulation system constitute a second unit ■, which is housed in a box 22 as shown in FIG. 0 box body 22
Inside, the air heat exchanger 5 and the hot water heat exchanger a3 are separated by a partition wall 22a, and in addition to these heat exchangers 3.5, a zero governor 7a and a hot water circulation path heat exchanger 12. Jistern tank 13. Exhaust sunlencer 23
etc. are stored.

Further, the hot water storage tank 15 constitutes a third unit (2), which is provided independently of the first unit (f) and the second unit (2) as shown in FIG.

As described above, each device of the heat pump type water heater is configured to be separated into three independent units, so each unit is miniaturized, thereby increasing portability.

In addition, since it is separated into each unit and miniaturized in this way, there is a high degree of freedom in installation, and it can be installed even in a general residence without affecting the living space.

For example, the first unit (2) can be housed in a pit of an apartment complex, and the second unit (2) can be placed in another location, such as a van land. In addition, in a spacious single-family house, the first unit I and the second unit 7) If can be stacked vertically as shown in FIG. 5, or can be installed close to each other on the left and right as appropriate.

Further, in the heat pump water heater, the heat exchanger 5 of the evaporator that generates a humid atmosphere is separated into the second unit H, which is independent from the hot water storage tank 15 of the third unit (2). . Therefore, corrosion of the hot water storage tank 15 is not accelerated due to moisture, and its life can be extended.

Further, the heat retention of the hot water storage tank 15 is not hindered.

In addition, since the component devices that require maintenance are assembled into one unit, maintenance can be centralized, making work easier.

FIG. 5 shows an example in which the first unit I and the second unit ■ are superposed vertically as described above.
During the superposition, the protrusion 20a provided on the top surface of the box 20 of the first unit 1 and the protrusion 22b provided on the bottom surface of the box 22 of the second unit 2 are made to fit into each other. . The male and female fitting portions of the protrusions 20a and 22b are
As shown in FIG. 6, they are further fixed by bolts 25 and pads 26 via cushioning rubbers 24 and 27.

The male-female fitting by the projections 20a and 22b is performed when the box body 20 of the first unit (2) and the box body 22 of the second unit (2)
Prevents sideways displacement due to engine vibration. Further, the buffer rubber 24 prevents engine vibration from propagating from the box body 20 to the box body 22, and the other buffer rubber 27 prevents the transmission of engine vibration from the box body 20 to the bolt 25.
This prevents engine vibration from being transmitted from the box body 20 to the box body 22 via the box body 20.

〔Effect of the invention〕

As described above, the present invention drives a compressor by an engine, and forces the refrigerant compressed by the compressor into a circulation system having a heat exchanger consisting of a condenser and an evaporator, and In a heat pump type water heater in which water is heated by a heat exchanger of a condenser and stored in a hot water storage tank, the water heater includes a first unit including the engine and a compressor, and a reheat exchanger. a second unit comprising;
Since it is constructed separately from the third unit including the hot water storage tank, each unit can be downsized. Therefore, it is possible to increase the portability of the device and the degree of freedom in installation. In addition, since the heat exchanger of the evaporator installed in the refrigerant circulation system is an independent second unit, the humid atmosphere generated by this heat exchanger causes
It will not accelerate corrosion of the hot water storage tank. Therefore, the life of the device can be extended.

[Brief explanation of drawings]

Figure 1 is a diagram of a hot water supply system incorporating the device of the present invention;
The figure is a partially cutaway schematic front view of the first unit in the same device, FIG. 3 is a partially cutaway schematic front view of the second unit, and FIG. 4 is a partially cutaway schematic front view of the second unit. 5 is a partially cutaway schematic front view showing the state in which the first and second units are assembled vertically, and FIG. 6 is an enlarged view of the joint between the first and second units. FIG. 1... Engine, 2... Compressor, 3... Hot water heat exchanger (condenser), 5... Air heat exchanger (evaporator), 15... Hot water storage tank, 20.22-・・・
Box body, I-...first unit, ■...second unit, ■...third unit.

Claims (1)

[Claims] The engine drives the compressor, and the refrigerant compressed by the compressor is forcedly circulated through a circulation system that has a heat exchanger consisting of a condenser and a heat exchanger consisting of an evaporator. In a heat pump hot water supply system for heating and storing hot water in a storage tank, the hot water supply system includes a first unit including the engine and the compressor, a second unit including the heat exchanger, and the hot water storage tank. 1. An engine-driven heat pump type hot water supply device, characterized in that it is divided into a third unit including a tank.