JPS6018734Y2 - Solar heating and cooling equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a heating and cooling device that utilizes solar heat.

Conventionally, this type of heating and cooling equipment has been developed, for example, by
There is one described in Publication No. 84133.

In this publication, a water piping heat collection system path with a solar heat collector and a heat storage tank, and a water piping cooling/heating circulation system path equipped with an air-to-water heat exchange device and an indoor heating/cooling unit are connected to a water pipe system. It is characterized by being connected by a refrigerant circuit of a water type heat exchange device, and can preheat water supplied by solar heat.

However, with the above-mentioned conventional system, the hot water from the collector is the same during both heating in the winter when there is little solar heat and cooling in the summer when there is plenty of solar heat.
Because it flows through a thread, there have been complaints about the effective use of solar heat, especially during summer cooling operations.

Therefore, the present invention was devised in view of the above-mentioned drawbacks of the conventional technology.The purpose of the present invention is to provide an air conditioning system that can effectively utilize solar heat, especially during cooling during the summer when solar heat is abundant. It is to be.

This invention, which is a distant relative of the above-mentioned object, is an air-conditioning device in which at least two hot water-fired refrigerators 5.6 and a fan coil unit 9 are connected to a solar heat collector 1 so as to be able to cool and heat the air. The hot water-fired refrigerators 5 and 6 described above are connected in an overlapping manner through parallel hot water channels and serial hot water channels, and these hot water channels are equipped with a switch for selectively switching to the parallel hot water channel or the serial hot water channel. There is a control device mainly composed of valves 10 and 11, and the control device is provided with a thermostat 13 capable of detecting the temperature of hot water from the hot water outlet of the hot water-fired refrigerator 5. When the detected hot water temperature t is below the switching temperature T, the switching valves 10 and 11 are configured to form parallel hot water channels.
is switched, and when the hot water temperature t detected by the thermostat 13 is equal to or higher than the switching temperature T, the switching valves 10 and 11 are configured to switch so as to form a series hot water channel. It is something.

According to the configuration described above, during normal cooling (when the hot water temperature t is below the switching temperature T), parallel hot water channels are formed and a general cooling operation is performed.

By the way, when cooling the air conditioner when solar heat is abundant (hot water temperature t
is higher than the switching temperature T), a series hot water channel is formed, hot water sequentially flows through the hot water-fired refrigerators 5 and 6, and the heat of the hot water from the solar collector 1 is transferred to one of the hot water-fired refrigerators. 5 and then used by the other hot water-fired refrigerator 6, and the temperature difference between the temperature before use and the temperature of the used device becomes larger than in the case of the parallel hot water channel, and the temperature of the solar heat collector 1 increases. The solar heat collection effect works greatly, increasing the amount of heat collected.

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

The hot water pipe 2 of the solar heat collector 1 is branched and connected to the cold and hot water inlets of a first hot water refrigerator 5, a second hot water refrigerator 6, and a fan fill unit 9 via a heat storage hot water storage tank 4. .

On the other hand, the water ring pipe 3 of the solar heat collector 1 is branched and connected to each hot outlet of the hot water-fired refrigerators 5 and 6 and the cold/hot water outlet of the fan coil unit 9 via a hot water storage tank 4 for heat storage.

Further, the cold water supply pipes 7.7 of the respective hot water-fired refrigerators 5, 6 are joined together and communicated with the cold/hot water inlet of the fan coil unit 9, while the return water pipes 8, 8 are joined together, and are connected to the cold/hot water inlet of the fan coil unit 9. It is connected to the cold/hot water outlet No.9.

A first switching valve 10 consisting of a three-way valve is provided in the water ring pipe 3 connected to the hot outlet of the first hot water-fired refrigerator 5, and a hot water supply pipe connected to the second hot-water refrigerator 6 is provided. The pipe 2 is provided with a second switching valve 11 consisting of a three-way valve, and both switching valves 10.11 are connected to a bypass pipe 12. both ends are connected.

Therefore, the thermostat 13 attached to the hot outlet of the first hot water-fired refrigerator 5 is linked to both switching valves 10.11, so that the thermostat 13 can be linked to the hot water temperature detection by the thermostat 13 during cooling. When the hot water from the hot outlet of the first hot water-fired refrigerator 5 is below the initial temperature T, which will be described later, the first switching valve 10 is opened in the direction along the water ring pipe 3, and the second The switching valve 11 is opened in the direction along the hot water pipe 2, in other words, both the hot water-fired refrigerators 5,
6, a parallel hot water channel is formed in which hot water flows in parallel.

Further, when the hot water from the hot outlet of the first hot water-fired refrigerator 5 is at or above the switching temperature T, the first switching valve 10 is opened in the direction of the bypass pipe 12 from the first hot-water refrigerator 5. , the second switching valve 11 is opened in the two directions of the hot water supply pipe from the bypass pipe 12 to the second hot water-fired refrigerator 6 .

In other words, a series hot water channel is formed that allows hot water to flow in series to both the warm water-fired refrigerators 5 and 6.

Note that the second switching valve 11 is opened in the direction along the hot water supply pipe 2 during heating.

The initial temperature T is set to the lowest operating temperature required for the operation of each hot water-fired refrigerator 5, 6.

Therefore, the parallel hot water channel is formed when the temperature t of the hot water from the hot outlet of the first hot water-fired refrigerator 5 is below the switching temperature T, while the series hot water channel is formed when the hot water temperature t from the hot water outlet of the first hot water-fired refrigerator 5 is below the switching temperature T. The temperature t of hot water from the hot outlet of the refrigerator 5 is the switching temperature T
It is formed at the above times.

In addition, 14 in the figure is an auxiliary cold/hot water generator that uses gas, oil, etc. as a heat source, and cannot utilize solar heat.
Moreover, it is used when the auxiliary cold/hot water generator 15 (described later) alone is insufficient in cooling capacity.

Reference numeral 15 denotes an auxiliary cold/hot water generator using gas or the like as a heat source, and is used when solar heat alone is insufficient for air conditioning or heating, or when solar heat cannot be used on rainy or cloudy days.

The waste gas from the auxiliary cold/hot water generator 15 is sent to the heat exchanger through the exhaust pipe 16 and is used to raise the temperature of the hot water flowing through the hot water supply pipe 2.

Reference numeral 18 denotes a flow rate control valve provided in the middle of the hot water pipe 2, which is linked to the thermostat 13, and is linked to the thermostat 13 to adjust the hot water flow rate to each of the parallel hot water channels or the serial hot water channels. Adjust the flow rate according to the situation.

Further, in the figure, 19 to 19 are circulation pumps, and 20 to 20 are on-off valves.

In addition, if a mechanism is provided to control the order of starting and stopping the hot water-fired refrigerators 5 and 6, the auxiliary hot water generator 14, and the auxiliary cold/hot water generator 15, even buildings with limited heat collection area can easily utilize solar heat. It is possible to provide functions that can be utilized efficiently, and it is possible to preferentially and efficiently utilize solar heat to reduce the amount of gas, oil, etc. used as auxiliary heat sources.

Subsequently, the functions and effects of the above-mentioned heating and cooling device will be explained.

[During heating] (See Figure 2) The hot water in the solar heat collector 1 is sent to the fan coil unit 9 via the hot water tank 4 for heat storage by the hot water supply pipe 2, and after being used for room heating, it is sent to the water circulation pipe 3. The hot water is circulated to the solar heat collector 1 via the hot water storage tank 4 for heat storage.

[When cooling]

Part 1: When the temperature t of the hot water from the hot water outlet of the first hot water refrigerator 5 is below the switching temperature T (see Fig. 3), the hot water of the solar heat collector 1 is transferred to the heat storage tank 4 through the hot water supply pipe 2. It is supplied in parallel to the first hot water-fired refrigerator 5 and the second hot water-fired refrigerator 6 through the heating medium, and is then used as a heating medium for them. It is circulated to the heating device 1.

In addition, the cold water of both warm water wiping refrigerators 5 and 6 is each cold water supply, %J
After being sent to the fan coil unit 9 through 7.7 and used for indoor cooling, it is circulated through the return water pipes 8 and 8 to each of the hot water-fired refrigerators 5 and 6.

Therefore, hot water is supplied to both warm water wiping refrigerators 5 and 6 in parallel.

Part 2 When the temperature t of hot water from the hot water outlet of the first hot water refrigerator 5 is equal to or higher than the switching temperature T (see Fig. 4), the first hot water refrigerator 5 changes from the state during cooling (part 1).
When the temperature t of hot water from the hot water outlet becomes equal to or higher than the switching temperature T, the first switching valve 10 and the second switching valve 15.1 are respectively switched by the thermostat 13, and the parallel hot water channels become the serial hot water channels. It will be done.

Then, the hot water from the solar heat collector 1 passes through the first hot water-fired refrigerator 5 and is then serially supplied to the second hot water-fired refrigerator 6 via the bypass pipe 12.

At the same time, the flow rate adjustment valve 18 adjusts the hot water flow rate to a flow rate corresponding to the case of a serial hot water channel.

Therefore, since hot water is supplied in series to both hot water wiping refrigerators 5.6, the temperature difference between the hot water supplied from the heat storage hot water storage tank 4 and the hot water returned to the hot water storage tank 4 is greater than when the hot water is supplied in parallel. growing.

Therefore, the solar heat collecting action of the solar heat collector 1 can be greatly enhanced, and a large amount of solar heat can be collected.

Further, when the temperature t of the hot water from the hot water outlet of the first hot water refrigerator 5 becomes equal to or lower than the switching temperature T from the state during cooling (part 2), the thermostat 13 controls both the switching valves 10,
11 is switched to the cooling state (Part 1).

That is, the gist of this invention is the above-mentioned configuration, and especially during cooling when solar heat is abundant (when hot water temperature t is higher than switching temperature T), a series hot water channel is formed and hot water is The hot water-fired refrigerators 5 and 6 are sequentially distributed, and the heat of the hot water from the solar collector 1 is used in one hot-water-fired refrigerator 5, and then used in the other hot-water refrigerator 6, and the heat of the hot water before use is The temperature difference between the temperature and the temperature after use becomes larger than in the case of the above-mentioned parallel hot water channels, and the solar heat collecting action of the solar heat collector 1 works to a large extent, increasing the amount of heat collected during cooling. This has the effect of making it possible to effectively utilize solar heat.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic explanatory diagram of an air-conditioning device, Fig. 2 is a schematic explanatory diagram showing the heating and cooling system;
FIG. 3 is a schematic explanatory diagram illustrating cooling by parallel hot water channels, and FIG. 4 is a schematic explanatory diagram showing cooling by serial hot water channels. 1...Solar heat collector, 5, 6...Hot water-fired refrigerator, 9...Fan coil unit, 10
, 11... switching valve, 13... thermostat.

Claims (1)

[Scope of utility model registration request] At least two hot water-fired 7J machines 5 are installed in the solar collector 1.
．． 6 and a fan coil unit 9 are connected to each other so as to be able to cool and heat each hot water-fired refrigerator 5,
6 is connected in an overlapping manner through a parallel hot water channel and a series hot water channel, and these hot water channels have a control mainly consisting of a switching valve 10.11 for selectively switching to the parallel hot water channel or the series hot water channel. The control device is equipped with a thermostat 13 capable of detecting the temperature of hot water from the hot water outlet of the hot water-fired refrigerator 5, and the temperature t of the hot water detected by the thermostat 13 is switched by the control device. Temperature T
In the following cases, the switching valves 10 and 11 are switched to form parallel hot water channels, and the thermostat 13 is
A heating and cooling device utilizing solar heat, characterized in that the switching valves 10 and 11 are configured to be switched so as to form a series hot water channel when the temperature t of the detected hot water is equal to or higher than the switching temperature T.