JPS62190353A - Method of controlling plurality of heat source apparatuses - Google Patents

Abstract

PURPOSE:To improve the heat efficiency of all the heat source apparatuses by causing a first load and a second load to correspond to a first heat source apparatus and a second heat source apparatus having a heat efficiency which is lower than that of the first heat source, respectively, and carrying out the shift of heat to the second load when the first heat source has a capacity allantance. CONSTITUTION:When a first heat source apparatus 1 is not fully loaded, heat flows from a pipeline 21 via a three-way valve 15 to a pipeline 16. In this case, a fluid flowing from a header 13 having a pipeline 14 flows to a pipeline 16 through a three-way valve 15. Thus, heat from the first heat source apparatus 1 is fed to a first load 5, and shifted to a second load. The flow quantity of the fluid flowing from a pipeline 21 to the pipeline 16 in the three-way valve 15 is controlled by the opening degree of the three-way valve 15. Therefore, the first heat source apparatus 1 is operated at a full load or in the vicinity of the full load. Accordingly, the improvement in the heat efficiency as a whole in a state where both the first heat source apparatus and the second heat source apparatus are being operated can be achieved.

Description

[Detailed Description of the Invention] Branch CFj Field The present invention uses a first heat source device such as a heat pump equipped with a compressor with good thermal efficiency, and a second heat source device equipped with a boiler or the like with low thermal efficiency. The present invention relates to a method of controlling a plurality of heat source devices.

BACKGROUND TECHNOLOGY When the temperature levels and load fluctuation patterns are different, such as in heating, hot water supply, and hot water pool water supply, beat pumps with high thermal efficiency and low compression costs are used to obtain hot water for heating. Boilers, etc., which have low thermal efficiency but are inexpensive equipment, are used for hot water supply, hot water pool water supply, etc.

Problems to be Solved by the Invention In this prior art, the capacity of the P1 pump is designed to be able to respond to the maximum heating load, but the capacity of this heat pump and the 1rLv5 load are as follows.
This does not always match, and in fact, the heating load is often much smaller than the capacity of the heat pump. In such cases, it is not possible to fully utilize the capacity of the heat pump, and it is therefore desirable for the heat pump to share part of the load, such as supplying hot water and water for hot water pools.

In addition, if a portion of the hot water from the beat pump is supplied at a constant flow rate to loads such as hot water supply and hot pool water supply, there is a risk that the hot water supply to the heating load will be insufficient.

The object of the present invention is to connect the first and second heat sources by means of a first heat source machine such as a compression pump and a second heat source Ql+fi such as a boiler having a lower thermal efficiency. It is an object of the present invention to provide a method for controlling a plurality of heat source machines in which the overall thermal efficiency is improved as much as possible when the machines are operated in accordance with individual loads.

Means for Solving Problems of Input The present invention provides a first heat source (1) and a second heat source (4a yuan, r: jS) which has a lower thermal efficiency than the first heat source (r: 1 load, fjI
The fluid from the 2 F% source is applied to the second load, the first heat source is operated so that the temperature of the fluid in the first heat source becomes a predetermined first set value, and the second heat source is , the second heat source device is operated so that the temperature of the fluid of the second heat source device becomes a predetermined second set value, and the temperature of the fluid of one foot of the first heat source is the first set value, and the first heat source When the machine is not at full load,
The first heat source is set so that the load on the first heat source becomes large.
This is a method of controlling a plurality of heat source devices characterized by transferring heat to and from an I2 load.

Effect According to the present invention, the first heat source machine and the second heat source (■) individually correspond to the first load and the second load, and
The heat a iso is operated so that the temperature of the fluid of the first heat source Rin becomes a predetermined first set value, and! ! ! ', 2 fever a
At this time, the temperature of the fluid in the second heat source is predetermined! ￥I
Operate so that the set value is 2. The temperature of the fluid of the first heat source device is the first set value, and the first heat source (
When the attack is not at full load, that is, the first heat'! 5. When there is sufficient capacity in the throat, the first heat r1. Heat is transferred between lfi and the second load. Therefore, the capability of the first heat source device can be fully utilized, and thermal efficiency can be improved. @2 When the load is, for example, hot water supply, water supply for heated pools, etc., hot water from the first heat & shrimp is supplied to the second load, and
When the 52 load is a cooling load, a low temperature fluid suitable for cooling is supplied to the second load.

Embodiment FIG. 1 is an overall block diagram of an embodiment of the present invention. The first heat a that generates @1 heat pump using compression ratio 4
Fluid such as water heated by 721 is supplied to the ttS1 load 5 for heating through the pipe 2, the header 3 and the pipe 4. The fluid after heating v5 from the first load 5 is:
The pipe 6 passes through the header 7, and then passes through the pipe 8.
The heat i&fi returns to 1 and the fluid is thus circulated. The first heat source 1 controls the internal combustion engine that drives the compression ratio. The load output of the ff11 heat source device 1 corresponds to the rotation speed of the internal combustion engine.

The second heat IFI 11 is, for example, a boiler, and has a lower thermal efficiency than the first heat Wjfftl. This second
Fluid such as hot water from the heat source device 11 is transferred from the pipe 12 through the header 13, pipe 14, three-way valve 15, and pipe 1G.
2 load 17. This second A load 17 is, for example, hot water supply, water supply for a heated pool, etc. The fluid from the second load 17 returns to the second heat source 11 from line 18 via header 19 and line 20, thus circulating the fluid.

The header 3 is connected to the three-way valve 15 via a conduit 21.

Conduit 18 is connected to header 7 via conduit 22 .

Temperature detection elements 23 and 24 are provided in the pipes 8 and 20,
As a result, the temperature of the fluid on the inlet side of the first heat source device 1 and the second heat source device 11 is detected.

FIG. 2 is a block diagram showing the electrical configuration of the embodiment shown in FIG. 1. Outputs from the temperature detection elements 23 and 24 are given to a processing circuit 25 realized by a microcomputer or the like. The rotational speed of the internal combustion engine driven by the compression engine from the first heat source device 1 is detected by the old number detection element 2G, and its output is given to the processing circuit 25. The processing circuit 25 controls the temperature of the internal combustion engine so that the temperature of the fluid detected by the temperature detection element 23 becomes the first setting value set by the first setting circuit 27. Further, the processing circuit 25 is configured such that the temperature detected by the temperature detection element 2.1 corresponding to the second heat source 11 is 0'S.
Two-pronged setting l'ili] path 29; Controls the combustion temperature of the burner set in the boiler so that the second setting value set here is achieved.

Referring to FIG. 3, from step 111 to step +12
Then, the operation of the first heat source device 1 and the second heat source device 11 is started. In step 113, it is determined whether the temperature detected by the temperature detection element 23 is the first setting value set in the first setting circuit 27, and if so, the process moves to step n4.

In step 114, it is determined whether the first heat source device 1 is under full load. 11 Whether the heat source unit 1 is under full load or not is determined by the rotation speed detection element 26 of the internal combustion engine that drives the compression generator provided in the first heat source unit. +:
tG U depending on whether the number has reached the 8′1 capacity upper limit.
l can. When the first natural source shrimp 1 is not fully loaded, the process moves to step 115, and part of the fluid in the pipe 21 flows through the three-way valve 15fL and into the pipe 1G. At this time, the fluid that has passed through the header 13 and the pipes 1 and 1 also flows through the three-way valve 15 and into the pipe 16. In this way, the heat from the first load 5 is supplied to the first load 5 and is also transferred to the second load 17. The flow rate of fluid flowing from the conduit 21 to the conduit 16 in the three-way valve 15 is controlled by the open position of the three-way valve 15.

Therefore, the first heat source 1 is operated at or near full load. This makes it possible to improve the overall thermal efficiency when both the first heat source 1 and the second heat source 11 are operated.

The fluid from the second load 17 is guided to the header 19 through the conduit 18 and to the header 7 through the conduit 22.

When it is determined in step 114 that the Pt5l heat source device 1 is under full load, step n 4
, and operation continues as it is.

In step n3, the temperature detected by the temperature detection element 23 is set to 1 in the first setting circuit 27.
If it is determined that the 1 set value has not been reached, the process moves to step 118, and it is determined whether the first heat source device 1 is under full load. When the first heat source device 1 is under full load, the fluid supplied from the header 3 to the three-way valve 15 via the Ir circuit 21 is cut off. This enables the first silent source 1 to supply fluid to the 11 load 5 so that the temperature detected by the temperature detection element 23 becomes the first set value.

In step n8, when it is cut off that the first heat '10 year 1 is not at full load, step nlO
1', an error message is displayed indicating that a malfunction has occurred.

Although the temperature detection elements 23 and 24 are configured to detect the inlet temperature of the heat source equipment 11 and the heat source equipment 12, as another embodiment of the present invention, the temperature detection elements 23 and 24 are interposed in the conduits 2 and 12 to detect the temperature at the output side. [111 temperature may be detected. f5
Although the two heat source devices 11 were boilers in the above-described embodiments, absorption type cold/hot water (boilers) may also be used. However, other embodiments of the present invention may include loads such as refrigeration and air conditioning.

Please note that the movement shown in Figure 3 is a basic movement, and is not used in real life.
In consideration of leopard changes, a time element is included in the judgment part.

Effects As described above, according to the present invention, the first heat f2 and the second heat source having a lower thermal efficiency are respectively made to correspond to the first load and the second load, and the first When the temperature of the fluid in the heat source device has reached the r51 set value and the first heat source time is not in a full load state and there is some margin, the first heat i
n causes heat to be transferred to the second load, thereby increasing the load borne by the first heat source.

This makes it possible to improve the overall thermal efficiency.

Further, such control does not interfere with the respective temperature control operations at the first and twelfth thermal rocks, and it is possible to perform stable control over a wide temperature range.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram of an embodiment of the present invention, FIG. 2 is a block diagram showing the electrical configuration of the embodiment shown in FIG. 1, and FIG. 3 is a 70- Naya [is] 1...first heat source year, 2.4. G, 8.1114i G
. 1812 (1...pipeline, 3,7.'13.19...
Header, 5...-first shellfish cargo, 11...second heat source machine, 1
5...Three-way valve, 17...12 load, 23.24...
Temperature detection element, 25...Processing circuit, 26...Concave rotation speed detection element, 27...First setting date route, 29...Second setting circuit Agent Patent attorney Keiichi Shisan Figure 1 Figure 2

Claims (1)

[Scope of Claims] A first heat source machine and a second heat source machine having lower thermal efficiency than the first heat source machine, the fluid from the first heat source machine being applied to the first load, and the fluid from the second heat source machine being supplied to the first load. is applied to the second load, the first heat source device operates so that the temperature of the fluid of the first heat source device becomes a predetermined first setting value, and the second heat source device operates the fluid of the second heat source device. is operated so that the temperature of the first heat source device becomes a predetermined second set value, and when the temperature of the fluid in the first heat source device is at the first set value and the first heat source device is not at full load, the first heat source device 1. A method for controlling a plurality of heat source devices, characterized in that heat is transferred between a first heat source device and a second load so that the load on the heat source devices increases.