JPS5912240A - Device making use of heat - Google Patents

Abstract

PURPOSE:To make use of a heat exchanger effectively, by providing one of heat exchangers of a heat pump in a water tank and a heat exchanger having an identical function with the foregoing heat exchanger and a heat exchanger having an opposite function to that of the foregoing heat exchanger are arranged respectively in two air ducts switchable to indoors and outdoors. CONSTITUTION:A heat exchanger 4 is provided in a space 3 of a cistern 1 divided by a partition wall 2, both ends of a duct of the heat exchanger 4 are taken out of the water tank 1 by making them penetrate through the water tank 1 in a liquid-tight state and one end of the duct is connected with a heat exchanger 6 whose function is identical with that of the heat exchanger 4. The other end of the heat exchanger 5 is connected with a heat exchanger 8 having an opposite function to that of the heat exchanger 5 through an expansion valve 7 and both the heat exchangers 6 and 8 are installed respectively in air ducts A and B formed within a duct switchablly to indoors and outdoors. On the one hand, a heat pump is constituted by enclosing a thermal medium by making connection to be made between the other end of the heat exchanger 4 and the other end of the heat exchanger 8 through a four-way valve into a closed circuit. With this construction, heat to be discharged outdoor is used for heating of the water tank 1 at the time of cooling and while on the other hand, waste heat of the water tank 1 can be used for acceleration of heating efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat utilization device using a heat pump.

Mechanical and chemical heat pumps are widely used as heating devices that use a refrigeration cycle because of their excellent energy saving properties.

However, although this type of heat pump has been put into widespread use as a heating and cooling system for homes, its use as a hot water production system by heating water is still at an experimental stage.

In other words, in the case of heating water, the load for bathing, hot water supply, showering, etc. is large when used in a house, and it usually costs 2,500 yen.
A heating capacity of approximately 0 Mcal/h is required. In this respect, although heating devices that use combustion of city gas or the like are inferior in energy efficiency, they have a high combustion output density and can be manufactured inexpensively and compactly. On the other hand, heating with a heat pump has a low combustion output density, and in order to obtain hot water in a short time, it is necessary to
A device with a capacity of about 0 Kcal/h is extremely expensive and large, making it difficult to adopt it for home use.

Incidentally, a temperature of about 50° C. at most is sufficient for hot water for daily life such as baths, hot water supply, showers, etc. Especially in the case of baths, they are rarely used except for bathing,
Since the so-called idle time is longer, there is almost no practical problem as long as this idle time can be used for energy-economically effective heating and heat retention. Also, especially at high temperatures (80 to 9
Even when hot water (0℃) is required, it is possible to shorten the heating time and save energy by drawing out the hot water that has been previously heated to around 50℃ by a heat pump and then heating it by combustion. The word is clear.

On the other hand, in order to maintain the coefficient of performance at a high level with the P1 pump, it is necessary to maintain the condensing temperature as low as possible, but if the temperature is sufficient for hot water of about 50"C, it is necessary to lower the coefficient of performance of the heat pump. It is fully possible to use it while maintaining high standards and satisfying energy saving characteristics.A small pump used in residential heating and cooling systems is sufficient to satisfy these conditions. be.

On the other hand, in the residential heating and cooling system, the heat exchanger installed outdoors is actually left unused without being used for indoor heat utilization.

The present invention has been made focusing on the following points.
In addition to installing a heat exchanger for a heat pump in a water tank such as a bathtub or hot water storage tank, we also install a heat exchanger with the same function and a heat exchanger with the opposite V& function selectively indoors and outdoors. The structure is arranged in two ventilation channels that can be freely switched so as to communicate with each other.It is compact and has excellent energy saving properties.Moreover, it has both water heating function and air conditioning function, and it eliminates the heat that was previously wasted. The purpose of this invention is to obtain a heat utilization device with extremely high utility value, which makes it possible to utilize heat as effectively as possible.

The present invention will be explained below based on illustrated embodiments.

In the figure, 1 is a bathtub installed in a residential bathroom,
A part of the space inside the bathtub 1 is partitioned by a partition wall 2, and holes 2a and 2 for hot water circulation are provided at the top and bottom of the partition wall 2, respectively.
b is open. A heat exchanger 4 consisting of a heat exchange coil is installed in a small space 3 partitioned by a partition wall 2 of the bathtub 1. Both ends of the pipe line of the heat exchanger 4 penetrate the outer wall of the bathtub 1 in a liquid-tight manner and protrude to the outside. Incidentally, the outer wall of the bathtub 1 is made of a heat insulating material, and the lid 5 covering the opening surface thereof is also made of a heat insulating material. Thereby, the bathtub 1 with the lid 5 closed can maintain its heat retention function.

On the other hand, a heat exchanger 6 having the same function is connected in series to one end of the heat exchanger 4 in the bathtub 1, and an opposite end is connected to the other end of the heat exchanger 6 via an expansion valve 7. A heat exchanger 8 having the function of 1 is disposed in two ventilation passages which are freely switchable so as to selectively communicate with the indoor and outdoor areas of the duct unit 9, respectively. The specific configuration of the duct unit 9 will be described later.

A closed circuit is formed by freely connecting the other end of the heat exchanger 4 and the other end of the heat exchanger 8 to the suction port and discharge port of the compressor 11 via the four-way valve 10. . Freon as a heat medium is enclosed in the closed circuit,
By circulating this Freon in the compressor 11, a heat pump is constructed as a whole.

Here, the compressor 11 driven by the motor 12 is a small one with an output of around IK, which has been conventionally used in household air-conditioning devices, and the entire heat pump system is accordingly miniaturized.

Next, a specific example of the duct unit 9 will be described based on FIG. 2. The duct unit 9 is attached by fitting a rectangular box-shaped main body 14 with a window 13 in the center into an outer wall that partitions indoors and outdoors, such as a bathroom. An indoor air population 15 and an air outlet 16 are opened at the bottom and top of the wall facing indoors of the main body 14, respectively, and an outdoor air population 1 is opened at the opposite wall portion facing outdoors, respectively.
7 and an air outlet 18 are opened. Here, the air population 15 and the air outlet 16 on the indoor side communicate into the room via the ducts [9, 20]. Further, between the two air inlets 15, 17 and between the two air outlets 16, 18, ventilation passage switching valves 21 and 22 are respectively installed with the central part pivoted so as to be freely rotatable in the horizontal direction. The switching valves 21 and 22 are connected via a shaft 23 whose respective support shafts are bent to avoid interference with the window 13, and the upper switching valve 22 penetrates the top wall of the main body 14.
The two switching valves 21 and 22 are interlocked in the same rotational direction via the shaft 23 by rotating the supporting shaft of the switch via a manual lever 24 or a motor connected thereto.
It is possible to switch between two ventilation paths.

The heat exchanger 6.8 and fans 25.26 for blowing air from below to above via the heat exchanger 6.8 are installed in the internal space of the main body 14 on both sides of the window 13, respectively. . Further, the compressor 1 is installed in the internal space of the main body 14 formed between the bottom wall of the window 13 and the switching valve 25.
1 is arranged. surface, compressor 11 and each heat exchanger 4
．． As shown in FIG. 1, 6.8 is connected by piping that passes through the inside and outside of the duct unit 1-14, but it is omitted in FIG.

Next, the operation of the device of this embodiment will be explained. First, when boiling a bath during the daytime, when the bath is normally reserved, after filling the bathtub 1 with water and closing the lid 5, the four-way valve 10 is set to the solid line position in FIG. On the other hand, when it is desired to cool the room when the temperature is high, such as in summer, the switching valves 21 and 22 of the duct l-unit 9 are set to the solid line positions. In this state, the motor 12 is turned on to drive the compressor] and the fan 25.
Turn on the switch of 26 and drive it. In this case, the heat exchanger 4 in the bathtub 1 connected to the discharge port of the compressor 11 via the four-way valve 10 and the heat exchanger 6 connected in series thereto function as a condenser, and the compressor 11
The heat exchanger 8 connected to the suction port of 1 functions as an evaporator, and the ventilation passage B in which the heat exchanger 8 is inserted is
9.20, and the ventilation path A, in which the other heat exchanger 6 is interposed, communicates with the outdoors via the air outlet 17 and the air outlet 18.

Therefore, first, the water in the bathtub 1 is heated to about 50° C. by the heat exchanger 4 which functions as a condenser.

In this case, conventional combustion type bathtubs can cause gas leaks or gas explosions, or even inadvertently overheat the bathtub 1, causing accidents such as abnormal heating or boiling inside the bathtub 1. Older people and older people are more likely to suffer burns, and there is also a risk of fire due to overheating of the bathtub.However, in the heat pump system of the present invention, the temperature of the freon flowing through the heat exchanger 4 is 10 degrees lower than the bathing temperature (approximately 42 degrees Celsius). The temperature is only about 30°F (°C) higher, and it is extremely safe as it prevents danger to people and property due to carelessness. Furthermore, if a heat pump drive switch is provided on the outer wall of the duct unit 9, the heat exchanger 4 can be used as a reheating device during bathing.

Meanwhile, in parallel with this, a heat exchanger 8 that functions as an evaporator
The air cooled by the fan 26 is blown in the direction of the chain arrow in the figure and circulated through the room through the ducts 19 and 20, thereby cooling the room. In other words, the bath water can be heated using the heat that was wasted outside during cooling using conventional heat pumps, resulting in an extremely rational heat utilization system.

In this case, initially, the amount of heat radiated by the heat exchanger 4 of the bathtub 1 is large, but as the temperature of the bath water rises, the amount of heat radiated by the heat exchanger 6 increases, and the coefficient of performance of the heat pump, that is, the cooling efficiency, remains approximately constant. is maintained.

Next, in cold weather such as winter, fill the bathtub 1 with water and leave the four-way valve 10 set at the solid line position and then press the switch valve 2.
If the compressor 11 and the two fans 25 and 26 are driven with the fan 1.22 switched to the position shown in chain lines, bath water heating and room heating can be performed simultaneously. That is, the bath water is heated by the heat exchanger 4 which functions as a condenser as described above, and the ventilation passage A in which the heat exchanger 6 is interposed is connected via the duct 19, 20 by the switching valve 21, 22 position. Since the heat exchanger 6 communicates with the room, the air warmed by the heat exchanger 6 is circulated into the room by the fan 25, heating the room. In addition, outdoor air is taken in from the air intake 17 by a fan 26 and is passed through a heat exchanger 8 which functions as an evaporator.
After being cooled by the air, it is discharged from the air outlet 18.

In this case, the two heat exchangers 4 and 6 that function as condensers have a lower heat exchange efficiency depending on the difference between the temperature of the freon flowing through them and the hot water temperature or room temperature. Since it operates in the most efficient manner, bath water heating and room heating can be performed efficiently and economically.

Similarly, when heating after using a bath in cold weather, the four-way valve 10 is switched to the dotted line position shown in the figure without draining the remaining hot water in the bathtub 1, and the switching valves 21 and 22 are also switched to the solid line position. The compressor 11 and fans 25 and 26 are driven.

In this way, the connections with the suction and discharge ports of the compressor 11 will be reversed from the previous case, so the heat exchangers 4 and 6 will function as evaporators, and the heat exchanger 8 will function as a condenser. Function. Therefore, the air warmed by the heat exchanger 8 is blown into the room by the fan 26 for heating. In this case, the inside of the bathtub 1 is kept at a high temperature by the heat exchanger 4 which functions as an evaporator. By effectively supplying heat from the remaining hot water, evaporation of CFCs is promoted and heating efficiency is increased.

Next, if you want to heat only the bath without heating or cooling, set the four-way valve 10 to the solid line position, the switching valves 21 and 22 to the chain line position, and at this time turn on the fan 25 on the ventilation path A side leading to the room. The drive is stopped and only the other fan 26 is driven. In this case, the air warmed by the heat exchanger 6 is not blown into the room, but in order to completely block the natural flow into the room, it is necessary to open and close the air inlets and outlets in the room that lead to the ducts 19 and 20. Just do it.

Another way to take advantage of the safety and economic efficiency of this device is to use the bathroom as a drying room. That is,
Since a bathroom is usually smaller than a living room, the bath water is drained to expose the heat exchanger 4, and the 4-way valve is placed in the solid line position to drive the heat pump, just as in the case of boiling bath water. Then, the heat exchanger 4 functions as an air heater and warms the inside of the bathroom 1 in a relatively short time. Therefore, the inside of the bathroom can be used as a drying room for laundry. In this case, the bathroom usually has a ventilation window or ventilation fan, so the humid air caused by evaporation from the laundry can be exchanged using the ventilation window or ventilation fan, and the temperature inside the bathroom can be adjusted as appropriate by controlling the heat pump using a temperature sensor. You can use it effectively by setting it. In this case, the switching valve 21.2
2 and fans 25 and 26 may be operated according to the use of air conditioning or heating.

FIG. 3 shows another embodiment of the present invention, in which, in addition to the above-described configuration, a bypass pipe 27 is connected in parallel with the heat exchanger 4 in the bathtub l, and one connection portion of the bypass pipe 27 is provided. A ventilation switching valve 4 is provided to selectively open the bypass pipe 27 and the heat exchanger 4.

That is, when the heat exchanger 4 side is opened by operating the switching valve 28, the same function as in the above embodiment is provided, but when the bypass pipe 27 is opened, the fluorocarbon does not pass through the heat exchanger 4. Since the bathtub 1 is passed through the heat exchanger 6, cooling and heating can be performed independently without heating the bathtub 1, and especially during heating operation, the room can be heated efficiently and in a short time.

FIG. 4 shows yet another embodiment of the present invention, in which a heat exchanger 4 provided in the bathtub 1 and one heat exchanger 6 provided in the duct unit 9 shown in the previous embodiment are connected in parallel. However, a switching valve 29 for selectively opening the reheat exchanger 4.6 is provided at one of the connections. In this case, the heating of the bathtub and the heating are carried out independently of each other. Furthermore, if a flow rate control valve capable of adjusting the flow rate of fluorocarbons to the reheat exchanger 4.6 is provided in place of the switching valve 29, bath heating and space heating can be performed at the same time, and the flow rate of fluorocarbons can be adjusted according to the degree of use. The heat exchange capacity of the two heat exchangers can be adjusted by changing the ratio.

Further, in the above embodiment, one of the heat exchangers is disposed in the bathtub, but it may be disposed in a hot water tank other than the bathtub. In this case, as described above, hot water heated to about 50° C. by a heat pump may be stored in a hot water storage tank and drawn out as appropriate for use as a shower, or may be further heated and used as high temperature hot water.

As explained above, according to the present invention, it has both a water heating function and an air conditioning function, and each heat exchanger can utilize heat as effectively as possible, so it is compact as a comprehensive residential heat utilization device. It can be manufactured at low cost and has many features such as excellent energy saving properties.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 is a block diagram of a duct unit used in the above embodiment, and Fig. 3 is a block diagram showing a second embodiment of the present invention. FIG. 4 is a configuration diagram showing a third embodiment of the present invention. ■...Bathtub 4,6.8...Heat exchanger 9...
・Duct unit 11... Compressor 21
, 22... Ventilation duct switching valve A, B... Ventilation duct patent applicant Misawa Homes Co., Ltd. Agent Patent attorney Fujio Sasashima

Claims (1)

[Claims] One of the heat exchangers of the heat pump is installed in the water tank, and a heat exchanger with the same function and a heat exchanger with the opposite function are switched to selectively communicate indoors and outdoors, respectively. A heat utilization device characterized by being arranged in two freely formed ventilation paths.