JPS5925154B2 - hot water making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water production machine, and more particularly to a hot water production machine that can produce water with different temperatures by driving a heat pump with an internal combustion engine immersed in a heat medium such as water. Regarding machines.

BACKGROUND ART With the diversification and improvement of lifestyles, hot water boilers for home use have become widespread and are used for various purposes such as space heating, bathing, and hot water supply.

These domestic hot water boilers include city gas, kerosene,
Various types of hot water systems are in use that use electricity or other sources as a heat source, but all of them have become problematic as the cost of hot water has increased due to the significant rise in fuel costs.

It is almost certain that energy prices will continue to rise, and it is clear that the problem of high hot water costs will become even more serious.

An object of the present invention is to solve the above-mentioned conventional problems and provide a hot water production machine with low fuel consumption.

Another object of the present invention is to provide a hot water production machine that can simultaneously produce two types of water having different temperatures.

In order to achieve the above object, the present invention injects water into two chambers that are thermally isolated from each other, and drives a heat pump once by an internal combustion engine immersed in water in one of the chambers. In this case, water with different temperatures is formed.

Hereinafter, the present invention will be explained in detail using actual cases.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

The can body 1 is vertically divided into three sides by a heat insulating partition plate 2, and has an upper chamber (high temperature side tank) 3 and a lower chamber (low temperature side tank) 4.
There are water containers 5 and 6 in each.

A lid 8 that can be opened and closed via a hinge 7 is provided at the upper end of the upper chamber 3, and the lid 8 holds an engine 9 and a heat pump compressor 10 connected thereto. It is immersed in water 5 in chamber 3.

The discharge side of the compressor 10 enters the suction side of the compressor 10 through a condensing coil 11 immersed in the water 6 of the lower chamber 4, an accumulator 12, an expansion valve B and an external evaporator 14.

The exhaust gas generated with the operation of the engine 9 is:
The exhaust gas is equipped with a heat exchanger 15, passes through an exhaust gas pipe 16 immersed in the water 5, loses heat to the water 5, and is discharged to the outside.

In such a configuration, the engine 9 is operated,
When the heat pump is operated, high temperature water is formed in the upper chamber 3 and water at a lower temperature is formed in the lower chamber 4, as will be clear from the description below.

That is, the exhaust heat generated as the engine 9 operates is effectively absorbed into the water 5 because the engine 9 is immersed in the water 5.

Further, since the exhaust gas pipe 16 is immersed in the water 5 as described above, the high temperature exhaust gas generated at the same time is also stripped of its heat by the water 5, becomes low temperature, and is discharged to the outside.

As is well known, the shaft output efficiency of an internal combustion engine is only about 25% even under full load, and approximately 75% of the applied energy is often discharged unused.

However, in the present invention, since the engine 9 is immersed in the water 5 in the upper chamber 3, a large amount of heat generated by the engine 90 is recovered by the water 5, and high-temperature hot water is obtained.

On the other hand, the refrigerant compressed and pressurized by the compressor 10 is immersed in water 6 in the lower chamber 4 and liquefied in the condenser 11. At this time, heat of condensation is given to the water 6 to raise its temperature. .

The liquefied refrigerant enters the external evaporator 14 via the accumulator 12 and the expansion valve 13, absorbs heat from the outside, vaporizes and expands, and then returns to the compressor 10 to form a refrigeration cycle.

As a result, the temperature of the water 6 in the lower chamber 4 is raised by the heat pump that uses groundwater, the atmosphere, waste heat, or the like as an external heat source 17.

As described above, in the present invention, by operating the refrigeration cycle as a heat pump, the temperatures of both the water 5 and 6 in the upper chamber 3 and the lower chamber 4 rise, but the temperature of the water 5 in the upper chamber 3 increases. The temperature will be higher.

That is, the water 5 in the upper chamber 3 absorbs the high-temperature exhaust heat generated by the engine 100, so the water temperature reaches approximately 50 to 95 degrees Celsius, which is a temperature suitable for heating a house and hot water supply, especially hot water supply. , you can take this out and use it directly, but
As shown in FIG. 1, water may be passed through the coil 18 to heat it.

The water 6 in the lower chamber 4 is heated by the heat pump as described above.

The C1,o-p (coefficient of performance) of a heat pump is determined by the heat source side (
The smaller the temperature difference between the evaporator side) and the user side (condenser side), the better the performance, so it is preferable not to make the temperature of the water 6 in the lower chamber 4 too high, and practically the upper limit is about 50°C.

Generally, when trying to obtain high-temperature water for hot water supply using a heat pump, c, o, and p drop significantly.
In the present invention, the high-temperature water is formed by immersing the internal combustion engine in water and recovering the waste heat, so there is no need to use a heat pump to form the high-temperature water, and it is relatively suitable for heating, etc. It can be used for low-temperature applications and cold water heating in hot water supply.

Therefore, despite the formation of high temperature water according to the invention, the c, o, p of the heat pump remains high and the overall efficiency is very high.

This is one of the major features of the present invention that is completely absent from conventional devices.

In the above embodiment, the inside of the lower chamber 6 is taken out to the outside using the low temperature coil 19, but it goes without saying that a water supply device may be added and the hot water in the lower chamber 6 may be taken out directly to the outside. .

The amount of hot or cold water used varies significantly depending on the season, time of day, weather, etc.

However, according to the present invention, two types of water with different temperatures can be obtained as described above, so by appropriately operating valves and the like, it is possible to respond well to fluctuations in loads such as heating and hot water supply.

FIG. 2 shows some of such modes of use of the present invention, where solid lines and broken lines indicate parts where water flows and parts where water does not flow, respectively, and arrows indicate the direction in which water flows. There is.

It goes without saying that these adjustments can be easily made by well-known means, such as by using valves (not shown), and can be used in many ways other than those shown in FIG. be able to.

FIG. 2a shows the case where the high temperature coil 18 and the low temperature coil 19 are used independently, and since high temperature and low temperature water are obtained separately, the amount of each used can be adjusted independently.

Figure 2 shows a case where the load on the low-temperature side is significantly larger than the load on the high-temperature side, for example, when a small amount of hot water is supplied and a large amount is used for space heating.

As is clear from FIG. 2, the low temperature coil 19 is not used, and only the high temperature coil 18 is used.

As explained earlier, the internal combustion engine 9 generates a large amount of heat,
Since the water 5 in the upper chamber 3 has a high temperature, it is possible to cope with a large amount of low-temperature load by using a high-temperature coil.

Figure 2C shows the mode of use when it is used only for hot water supply, not for heating or bathing, such as during the daytime on a clear day in winter, that is, when the high-temperature load is significantly larger than the low-temperature load. show.

In this case, the water first enters the cold coil 19 and then the hot coil 18 to be delivered to the load.

After being preheated by the low temperature coil 19, the high temperature coil 18
Because it enters the water, a large amount of high-temperature water can be obtained.

Alternatively, by connecting the low-temperature coil 18 and the high-temperature coil 19 in series to create a hot water supply circuit exclusively for city water, and using the hot water in the upper and lower chambers directly for heating, heating and hot water supply can be performed independently. can.

This solves the conventional problem that when a large amount of hot water is supplied to a bath or the like, cold water circulates and heating becomes difficult.

As is clear from the above description, the present invention uses a heat pump with the internal combustion engine being driven immersed in water in one room, thereby absorbing all of the exhaust heat from the internal combustion engine into the water. While obtaining hot water at a temperature of 45°C to 50°C, the heat pump also provides water at a relatively low temperature of 45 to 50°C to the other room.

Since the present invention has the above configuration, it has many features as described below.

(1) The internal combustion engine that drives the heat pump is immersed in water and is used to form hot water at a high temperature.
All of the exhaust heat from an internal combustion engine is absorbed by water.

Therefore, compared to conventional combustion boilers, nearly twice as much heat can be used for the same amount of fuel consumption, making it extremely effective in reducing fuel costs.

(2) Since water with different temperatures can be formed at the same time,
It can be used for far more purposes than traditional devices.

(3) By attaching the internal combustion engine to a lid that can be opened and closed,
The effect of sound and vibration isolation is extremely noticeable, and maintenance is also easy because the internal combustion engine can be easily taken out of the water.

(4) When trying to obtain high-temperature hot water using a heat pump, c, o, and p decrease, but according to the present invention, c, o, and p decrease.
You can obtain high-temperature hot water while maintaining a high temperature.

(5) Since the internal combustion engine that drives the heat pump is immersed in water with sufficient heat, the frequency of turning on and off is significantly reduced, and no trouble occurs even if the heat pump is turned on immediately after being turned off.

(6) Because the internal combustion engine is immersed in hot water,
There is no fear of a cold start or the various troubles associated with it, and light oil, heavy oil, etc. can be used as fuel.

Since the present invention has such many features, it can be used for many purposes, and is particularly suitable as a domestic hot water boiler.

In the above example, for the sake of clarity, the case was shown in which water 5 and 6 were placed in the upper chamber 3 and lower chamber 4 of the can body 1, respectively, but indirect heating was performed using high temperature and low temperature coils 18° and 19. Of course, oil and various other liquid media can be used in addition to water, and are within the scope of the present invention.

In addition, the above embodiment shows a structure in which the can body 1 is vertically arranged on three sides, and this structure is often the most convenient in practice, but the present invention is not limited to this embodiment. Needless to say, various modifications such as one in which the chamber is divided in the horizontal direction or one in which two chambers are independently separated are possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a leprosy example of the present invention. FIG. 2 is a diagram for explaining the mode of use of the present invention. 1... Can body, 2... Insulating partition plate, 3... Upper chamber (high temperature tank), 4... Lower chamber (low temperature tank), 5,
6... Water, 9... Engine, 10... Compressor, 11... Condenser, 12... Accumulator, 13... Expansion valve, 14... External evaporator, 15...
...Heat exchanger, 16...Exhaust gas pipe, 17...Gai-no-Kihihara, 18...High-temperature coil, 19...Low-temperature coil.

Claims (1)

[Claims] 1. Two chambers into which a heat medium such as water is injected, an internal combustion engine immersed in the heat medium in one of the two chambers, and a connection to the internal combustion engine. compressor,
means for transferring external heat to the heat medium in the other of the two chambers by repeating compression and liquefaction of the refrigerant by the compressor and expansion and vaporization of the compressed and liquefied refrigerant; The temperature of the heat medium in one of the chambers is made higher than the temperature of the heat medium in the other chamber by driving a compressor to repeatedly compress and liquefy and expand and vaporize the refrigerant. Hot water making machine. 2. The hot water production machine according to claim 1, wherein the internal combustion engine is held by an openable/closable lid in the upper part of the one chamber.