JPS5810655B2 - Solar heating/cooling/water heating equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air-conditioning, heating, and water-heating device that utilizes solar heat.

In particular, improvements are made to a type of solar heat collector, a heat storage tank connected to the solar heat collector in a loop via a heat collection pump, and an auxiliary boiler piped in series to the heat storage tank. This invention relates to improvements to air-conditioning, heating, and water-heating equipment equipped with a solar heat source.

As a conventional device equipped with a heat source of the above type, there is, for example, the device described in Japanese Patent Application No. 57-57207 (Japanese Patent Publication No. 10971-1982).

This Jusho device is equipped with a heat source of the above type, an absorption refrigerator, and an air conditioner, and the heat source pump supplies heat medium to the regenerator of the absorption refrigerator (in the case of cooling operation). It is arranged so as to share the supply to the air conditioner (in the case of heating operation), and is arranged so as to supply the refrigerant obtained from the cold water pump or the evaporator of the absorption refrigerator to the air conditioner.

The load on the heat source pump is the regenerator of the absorption refrigerator or the air conditioner, and the load on the cold water pump is the air conditioner.

Generally, air conditioners are connected to each room on each floor of a building by piping, so the load from the perspective of the pump is quite heavy. , each cold water pump requires a large pump with the same capacity.

On the other hand, the regenerator of an absorption chiller has a light load when viewed from the heat source pump, or considering that it is shared with the heat medium supply to the air conditioner, the heat source pump has a large load during heating operation. You have to choose according to the load.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an apparatus configuration in which each of the above pumps has a capacity suitable for heavy loads and light loads.

According to the present invention, the heat source pump is disposed between the auxiliary boiler at the heat source outlet and the regenerator of the absorption chiller, and the heat medium is supplied only to the regenerator, and the pump is used as a cold/hot water pump. It is arranged between an auxiliary boiler or an evaporator of an absorption chiller and an air conditioner to supply heat medium or refrigerant only to the air conditioner.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below as illustrated in the accompanying drawings.

In FIG. 1, a heat collector 1 that captures solar energy and a heat storage tank 2 that stores thermal energy are shown.

The heat collector 1 and the heat storage tank 2 form a closed loop via a heat collection pump P4.

The upper inlet of the heat storage tank 2 is piped to the lower inlet of the auxiliary boiler 3.

This auxiliary boiler 3 is used to replenish heat with auxiliary fuel such as gas or kerosene when the amount of heat stored in the previous heat storage tank is insufficient due to sunlight hours, and constitutes an outlet of a heat source using solar heat. .

The upper outlet of the auxiliary boiler 3 is connected to the regenerator of the absorption chiller 4 via the heat source pump P2 and a valve that is opened during cooling operation, and the heat medium return pipe of the regenerator is connected to the lower part of the heat storage tank 2. Ru.

The upper outlet of the auxiliary boiler 3 is also connected to the air conditioner 7 via a three-way switching valve and a cold/hot water pump P1, and the outlet is piped back to the lower part of the heat storage tank 2 via the three-way switching valve.

Further, as shown in the figure, a heating floor panel 8 may be connected in parallel with the air conditioner 1.

The air conditioner 7 is also connected to the evaporator of the absorption refrigerator 4 via two three-way switching valves and a cold/hot water pump P1.

The condenser of the absorption chiller 4 is connected to the cooling tower 5 via a cooling water pump P3.

The hot water supply system is composed of a heat exchanger 9 provided in the heat storage tank 2 and a heat exchanger 6 provided in the auxiliary boiler 3.

Next, the operation will be explained.

The heat collector pump P4 generates a 2-position signal T1 when the outlet temperature of the heat collector 1 becomes even slightly higher than the temperature of the lower part of the heat storage tank 2.
The solar heat collected by the heat collector 1 is sent to the heat storage tank 2 and stored there.

First, heating operation H will be explained.

Assume that the operation mode is ordered to be a solar operation S in which the device is operated only by solar heat without using an auxiliary boiler.

If the upper temperature of the heat storage tank 2 is sufficient for heating (heating effective temperature), a T2 signal is output, the cold/hot water pump P1 is activated, and thermal energy is supplied from the heat storage tank 2 to the air conditioner 7.

If the upper temperature of the heat storage tank 2 is insufficient for heating, the cold/hot water pump P1 is stopped by the T2 signal from the temperature controller, and the inoperability is clearly indicated by light emission.

Assume that the operation mode is commanded to be a dual operation SS.

This dual-purpose operation means that when the amount of solar heat collected is sufficient, operation is performed using only solar heat, and when it is insufficient, the amount of heat is automatically supplied by auxiliary boiler 3, and operation is performed using the amount of heat from the sun and the auxiliary boiler. That's what I'm trying to do.

If the T2 signal indicates the heating effective temperature, the cold/hot water pump P
1 is activated to supply heat energy from the heat source to the air conditioner 7, but when the T2 signal no longer indicates the effective heating temperature, the ignition device and burner valve vB are controlled in two positions by the T4 signal in the auxiliary boiler 3, The auxiliary boiler 3 heats the water to an effective heating temperature, and supplies hot water within a certain temperature range to the air conditioner 7 to continue the heating operation.

Next, cooling operation C will be explained.

Assume that the driving mode is commanded to be solar driving S.

The T3 signal is at a temperature sufficient to operate the absorption chiller 4 (
This indicates the cooling cycle guaranteed temperature in the absorption chiller 4 (cooling effective temperature), that is, the heat source temperature to the regenerator (this is T
, detected by a signal), when the chilled water temperature (required cooling temperature) T7 in the evaporator and the coolant temperature T8 in the condenser satisfy the freezing conditions, the heat source pump P2 operates and supplies heat to the absorption chiller 4. Energy is supplied.

At this time, the cooling water pump P3 is activated to send cooling water to the cooling tower 5, and the cold/hot water pump P1 is activated to supply the cold water obtained by the absorption chiller 4 to the air conditioner 7, thereby achieving cooling operation. It will be done.

If the T3 signal does not indicate the effective cooling temperature, all the operating devices except the heat collecting pump P4 stop and clearly indicate that they cannot be operated by emitting light.

Assume that the driving mode is set to dual-purpose driving SS.

If the T8 signal indicates an effective cooling temperature sufficient to operate the absorption refrigerator 4, the above-mentioned cooling operation is continued.

If the T3 signal does not indicate the cooling effective temperature, at that point the temperature control changes to the T5 signal, and the T signal controls the burner valve VB of the auxiliary boiler 3 to the 2 position.

At this time, the T6 signal confirms that the heat source temperature for the absorption refrigerator 4 is controlled to an appropriate temperature that is not too high.

Regarding hot water supply, regardless of the operating mode, the burner valve VB of the auxiliary boiler 3 is controlled by the flow rate switch Fs and the temperature signal T9 in the hot water supply pipe.

In addition, when heating is performed using the floor panel 8, the temperature signal T
The cold/hot water pump P1 is activated by the IO and the heat collection signal T, so that heat can be stored in the floor panel 8.

Therefore, if the temperature signal at each point is represented by the T1 to T101 flow rate switch signal as a two-position signal Fs, and the manual signal is represented by cooling operation C1 heating operation H1 stop R3, solar operation S, and dual-purpose operation SS, the following logical algebraic expression can be obtained. The expression indicates the operation and inoperability of each operating device, that is, the cold/hot water pump P1, the heat source pump P2, the cooling water pump P3, the heat collecting pump P4, and the burner valve VB, and the light-emitting display ■E indicating the inoperability.

P, -C-T8・Rs(S+T3)+H''RS(S+T
2) +H-T1-T1゜P2-C-T8・T7・RS (K・T3・T6+T3)
P3-C-T8/T7/RS (0/T3/T6+ is also 3)
P4=T1 VB=C-R8-8-T8-T7-T3-T50H-R
8-8-T2ET4+T9EFs■E-H-8-T2+
C-8-T3 However, 5=SS+R8.

FIG. 2 shows each of the above-mentioned operations using an actual logic circuit according to the above-mentioned logical formulas.

In FIG. 2, switch S1 is a heating/cooling changeover switch, and switch S2 is an operation mode selection switch.

Symbol A1 is an impedance converter that converts a no-voltage contact signal into a voltage-2 position signal, A2 is a light emitting diode drive circuit that indicates that operation is disabled, and A3 is an IC logic element that amplifies the output and realizes starting and stopping of each operating machine. This figure shows a large-capacity switch element drive circuit that provides high-capacity switching.

According to the present invention, in an air conditioning/heating/water heater equipped with a solar heat source configured by connecting a heat storage tank and an auxiliary boiler in series, a pump supplies a heat medium to a regenerator of an absorption chiller. The pumps are separated into two types: one for small loads, which supplies heat medium or refrigerant to air conditioners, and one for large loads, which supplies heat medium or refrigerant to air conditioners. Therefore, it is possible to construct a device with a high degree of energy efficiency, which has the effect of further promoting energy saving.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a solar heating, cooling, and hot water supply apparatus according to the present invention, and FIG. 2 is a logic circuit diagram for realizing the operation shown in FIG. 1. 1... Heat collector, 2... Heat storage tank, 3...
... Auxiliary boiler, 4 ... Absorption chiller, 5
... Cooling tower, 6,9 ... Hot water heat exchanger, 7 ... Air conditioner, 8 ... Floor panel, P1 ...・・Cold/hot water pump, P2・・・・
・Heat source pump, P3...Cooling water pump, P4・
... Heat collection pump, VB ... Burner valve.

Claims (1)

[Claims] 1. A solar heat source consisting of a solar heat collector, a heat storage tank connected to the solar heat collector in a loop via a heat collection pump, and an auxiliary boiler piped in series to the heat storage tank. an absorption chiller operated by a heat medium received from a heat source, an air conditioner connected to the evaporator of the absorption chiller and the auxiliary boiler via a three-way switching valve, and the inside of the heat storage tank and the auxiliary boiler. In a solar heating/cooling/water supply system equipped with a hot water supply system including a heat exchanger, a heat source pump is disposed between the auxiliary boiler and the regenerator of the absorption chiller, and the cold/hot water pump is connected to the three-way switching system. 1. A solar heating, cooling, and hot water supply device, characterized in that it is disposed between a valve and the air conditioner.