JPH09145182A - Heat source machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an accurate sensing of temperature of cold water to be always carried out in a heat source machine having a thermal radiating part and a heat absorbing part by a method wherein the heat absorbing part is provided with a low temperature chamber filled with working gas and a low temperature heat exchanger and further the low temperature chamber is provided with a temperature sensing means. SOLUTION: As a heat source machine applied in a cold or hot water supplying circuit of an air conditioner, a heat gas engine 1 utilizing a Vermier cycle is used. In the case that a piston 2 at a high temperature side and a piston 3 at a low temperature side are operated, enclosed working gas is passed through a high temperature regenerator 4 and a low temperature regenerator 7 and moved. At this time, a giving or an acceptance of heat with an external area is carried out at middle temperature heat exchangers 5, 6 connected to middle temperature chambers 13, 14 and at a low temperature heat exchanger 8 connected to a low temperature chamber 15. When a heater 16 gives heat to the working gas in a high temperature chamber 12, the working gas in the middle temperature chambers 13, 14 radiates heat at the middle temperature heat exchangers 5, 6 and the working gas in the low temperature chamber 15 absorbs heat at the low temperature heat exchanger 8. Then, in the case that there is a possibility that cold water is super-cooled with output from a temperature sensor 17, the heat gas engine 1 is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source device having a heat absorbing portion and a heat radiating portion, which is capable of accurately detecting the temperature of cold water.

[0002]

2. Description of the Related Art Generally, the heat absorbing part, the heat dissipating part, the indoor heat exchanger, and the outdoor heat exchanger of a hot gas engine utilizing the Vilmier cycle are connected by pipes through which a heat medium such as water circulates. Air conditioners are known (for example, Japanese Patent Publication No. 5-657).
No. 77). In this type of air conditioner, a temperature sensor such as a thermistor that detects the water temperature is attached to the cold water pipe connected to the heat absorbing unit, and the combustion amount of the combustor is controlled according to the temperature detected by the temperature sensor. ing.

[0003]

However, in the configuration of the conventional example described above, when a situation occurs in which water does not flow through the cold water pipe, accurate temperature detection of the cold water cannot be performed,
There is a problem that the low greenhouse and the low temperature heat exchanger are excessively cooled, and in extreme cases, the cooling water in the low temperature heat exchanger is frozen.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and to provide a heat source machine capable of always detecting the accurate temperature of cold water.

[0005]

The invention according to claim 1 is a heat source machine driven by using a combustor and having a heat radiating portion and a heat absorbing portion, wherein the heat absorbing portion is a low temperature containing a working gas. It is characterized in that it is provided with a chamber and a low temperature heat exchanger, and that the low temperature chamber is provided with temperature detecting means so that the temperature of the low temperature chamber can be directly detected.

According to a second aspect of the present invention, in a heat source machine driven by using a combustor and having a heat radiating portion and a heat absorbing portion, the heat absorbing portion is a low temperature chamber filled with a working gas and a low temperature heat exchanger. And a temperature detecting means for detecting the temperature of the low temperature chamber is provided on the outer wall of the low temperature chamber.

According to these aspects of the invention, since the temperature of the cold room is detected, even if water does not flow through the cold water pipe, it is possible to detect the temperature of the cold water almost accurately while estimating the temperature. Therefore, it is possible to prevent the indoor heat exchanger from being overcooled.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a cold / hot water supply circuit that constitutes a heat pump type air conditioner using a hot gas engine, which is an embodiment of a heat source device according to the present invention. A hot gas engine 1 utilizing a cycle is used. The Vilmier cycle hot gas engine 1 itself is publicly known, and a detailed description thereof will be omitted. However, the high temperature side piston 2 and the low temperature side piston 3 arranged orthogonally to each other are provided, and these are filled with working gas such as helium. It is stored in a container. The inside of the container is divided into a high temperature chamber 12, middle greenhouses 13 and 14, and a low temperature chamber 15. Further, it has a heater 16, and the heater 16 is heated by the combustor 11.

As shown in FIGS. 1 to 3, a temperature sensor 17 such as a thermistor for detecting the temperature in the low temperature chamber 15 is attached to the outer wall of the low temperature chamber 15. The temperature sensor 17 corresponds to the temperature detecting means.

When the high temperature side piston 2 reaches an intermediate position toward the top dead center,
The low temperature side piston 3 is connected through a crank 10 driven by a motor 9 so that the low temperature side piston 3 can be operated with a 90 ° phase shift with respect to each other such as reaching the left dead center. When the high temperature side piston 2 and the low temperature side piston 3 operate, the enclosed working gas moves through the high temperature regenerator 4 and the low temperature regenerator 7 and is heated when passing through these regenerators 4 and 7. The working gas in the closed container is pressurized or depressurized because it is cooled or cooled. For example, when the working gas in the high temperature chamber 12 moves to the middle temperature chamber 13 through the high temperature regenerator 4, the working gas stores heat in the high temperature regenerator 4. Further, when the working gas returns from the high-temperature regenerator 4 to the high-temperature chamber 12, the heat stored in the high-temperature regenerator 4 is returned to the working gas.

The heat exchange with the outside is carried out by the medium temperature heat exchangers 5 and 6 connected to the medium greenhouse and the low temperature heat exchanger 8 connected to the low temperature chamber. For example, the heater 16 gives heat to the working gas in the high temperature chamber 12, the working gases in the middle greenhouses 13 and 14 radiate heat in the middle temperature heat exchangers 5 and 6, and the low temperature chamber 1 also.
The working gas 5 absorbs heat in the low temperature heat exchanger 8.

That is, the low temperature heat exchanger 8 and the low temperature chamber 15 constitute a heat absorbing portion, and the intermediate temperature heat exchangers 5 and 6 and the intermediate greenhouses 13 and 1 are included.
4 constitutes a heat radiating part.

According to this embodiment, an air conditioner 100 is provided which uses the low temperature heat exchanger 8 of the hot gas engine 1 and the medium temperature heat exchangers 5 and 6. This air conditioner 1
00 includes the hot gas engine 1, the indoor unit 200, and the outdoor unit 300. An indoor heat exchanger 201 is arranged inside the indoor unit 200, and an outdoor heat exchanger 300 is arranged inside the outdoor unit 300. Reference numeral 203 is an indoor fan, and 303 is an outdoor fan. The low temperature heat exchanger 8 and the indoor heat exchanger 201 are connected by a pipe line 21, a four-way valve 61 and a pipe line 22, and the indoor heat exchanger 200 and the low temperature heat exchanger 8 are connected by a pipe line 23, a four-way valve 62 and a pipe line. It is connected by a path 24. In addition, the medium temperature heat exchanger 5 and the outdoor heat exchanger 301 include the pipe line 31 and the four-way valve 6.
1 and the pipe 32, and the outdoor heat exchanger 30
1 and the intermediate temperature heat exchanger 6, the pipe 33, the four-way valve 62 and the pipe 3
Connected by 4. In addition, the medium temperature heat exchangers 5 and 6
Are connected by a conduit 35. Water is used as the heat medium circulating in the pipeline.

Next, the operation of this embodiment will be described. During the cooling operation, the hot gas engine 1 is activated by the ignition of the combustor 11, and heat is radiated from the intermediate temperature heat exchangers 5 and 6, and the low temperature heat exchanger 8 absorbs heat. The four-way valves 61 and 62 are switched as shown by the solid line in FIG. In this case, the cold water absorbed in the low temperature heat exchanger 8 is
The indoor fan 203 flows through the pipe 21, the four-way valve 61, and the pipe 22 to the indoor heat exchanger 201, where heat is exchanged.
After the cold air is sent out into the room by rotating (cooling), it returns to the low temperature heat exchanger 8 through the pipe line 23, the four-way valve 62 and the pipe line 24.

At this time, the hot water which has received heat radiation in the intermediate temperature heat exchanger 5 flows to the outdoor heat exchanger 301 through the pipe 31, the four-way valve 61 and the pipe 32, and the outdoor fan 303 is rotated there to exchange heat. After that, it flows to the intermediate temperature heat exchanger 6 through the pipe line 33, the four-way valve 62 and the pipe line 34, and further returns to the intermediate temperature heat exchanger 5 through the pipe line 35.

During the heating operation, the hot gas engine 1 is activated by the ignition of the combustor 11, the heat is radiated from the intermediate temperature heat exchangers 5 and 6, and the low temperature heat exchanger 8 absorbs heat. In addition, the four-way valve 61,
62 is switched as shown by the dotted line in FIG.
In this case, the warm water that has received heat radiation in the intermediate temperature heat exchanger 5 passes through the pipe 31, the four-way valve 61, and the pipe 22 to the indoor heat exchanger 20.
1, heat was exchanged by rotating the indoor fan 203 there, and warm air was sent out into the room (heating).
After that, the medium temperature heat exchanger 6 flows through the pipe line 23, the four-way valve 62, and the pipe line 34, and further through the pipe line 35.
Return to

At this time, the cold water absorbed in the low-temperature heat exchanger 8 flows to the outdoor heat exchanger 301 through the pipe 21, the four-way valve 61, and the pipe 32, where the outdoor fan 303 is rotated to exchange heat. After going, pipeline 33, four-way valve 6
2. Return to the low temperature heat exchanger 8 through the pipe 24.

Next, the operation mode according to this embodiment will be described. For example, during the above cooling operation, the pipe lines 21, 22, 23, 24 through which cold water circulates for some reason.
Suppose there is a situation in which no water flows. Even in such a case, according to the present embodiment, since the temperature sensor 17 provided in the low temperature chamber 15 measures the temperature of the cooling system with reference to FIGS. If the cold water in the low temperature heat exchanger 15 and the low temperature heat exchanger 8 is likely to be overcooled, the combustor 11 is extinguished and the motor 9 is stopped to stop the hot gas engine 1. As a result, the cooling water in the low temperature chamber 15 and the low temperature heat exchanger 8 is prevented from being supercooled or frozen.

When the cooling operation is stopped, the four-way valve 61
, Are switched in reverse as shown by the solid line in FIG. When stopped after the cooling operation, the cold water absorbed in the low temperature heat exchanger 8 flows to the outdoor heat exchanger 301 through the pipe 21, the four-way valve 61 and the pipe 32, and the pipe 33, the four-way valve 62. ,
The water reaches the middle temperature heat exchanger 6 through the pipe 34, becomes warm water by passing through the middle temperature heat exchanger 5 through the pipe 35, and passes through the pipe 31, the four-way valve 61, and the pipe 22 to the indoor heat exchanger 20.
1 and returns to the low temperature heat exchanger 8 via the pipe 23, the four-way valve 62 and the pipe 24. In this case, the hot gas engine 1 continues the self-sustaining operation until the temperature of the heating chamber 16 or the high temperature chamber 12 is cooled to some extent, so that the hot gas engine 1 continues to work during the period and the medium temperature heat exchanger is used. Hot water is sent from 5. However, since the water circulation circuit becomes one series circuit by switching the four-way valve 61, the temperature of the hot water from the medium temperature heat exchanger 5 is sent to the low temperature heat exchanger 8 and therefore the temperature thereof does not further drop. The freezing of cold water in the low temperature heat exchanger 8 is prevented.

The four-way valve in the above embodiment is equipped with actuators (not shown) for operating the valves, and these actuators are provided in the air conditioner 100 in the above embodiment according to each operation mode. A control device (not shown) such as a microcomputer for controlling the above is installed.

Although the present invention has been described based on the embodiments of the present invention, it is obvious that the present invention is not limited to the above embodiments. For example, in the above-described embodiment, the one using the Vilmier cycle is shown as the hot gas engine 1, but it goes without saying that the hot gas engine according to the absorption type cycle may be used. Further, the heat medium circulating in the pipe may be other than water. Further, the temperature sensor may be a detector other than the thermistor. Further, in the above embodiment, a four-way valve is used in addition to the on-off valve to control the path of cold water or hot water, but this may be realized by a combination of the on-off valve and the three-way valve.

[0022]

As is apparent from the above description, according to these inventions, since the temperature detecting means is provided in the low temperature chamber,
Even if water does not flow to the cold water pipe for some reason, the temperature of the cooling system can be accurately detected, and the freezing of the cold water in the low temperature chamber and low temperature heat exchanger can be prevented. can do.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration during cooling in a heat pump type air conditioner using a hot gas engine according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of the heat pump type air conditioner shown in FIG. 1 during heating.

3 is a perspective view showing a more detailed configuration of the hot gas engine shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Hot Gas Engine 2 High Temperature Side Piston 3 Low Temperature Side Piston 4 High Temperature Regenerator 5,6 Medium Temperature Heat Exchanger 7 Low Temperature Regenerator 8 Low Temperature Heat Exchanger 9 Motor 10 Crank 11 Combustor 12 High Greenhouse 13,14 Medium Greenhouse 15 Low Greenhouse 16 Heater 17 Temperature sensor 21-24, 31-34 Pipeline 61,62 Four-way valve 100 Air conditioner 200 Indoor unit 201 Indoor heat exchanger 203 Indoor fan 300 Outdoor unit 301 Outdoor heat exchanger 303 Outdoor fan

Claims (2)

[Claims] 1. A heat source machine driven by using a combustor and having a heat radiating portion and a heat absorbing portion, wherein the heat absorbing portion includes a low temperature chamber in which a working gas is sealed and a low temperature heat exchanger. The heat source device is provided with a temperature detecting means for directly detecting the temperature of the low temperature chamber. 2. A heat source machine driven by a combustor and having a heat radiating portion and a heat absorbing portion, wherein the heat absorbing portion includes a low temperature chamber filled with a working gas and a low temperature heat exchanger. A heat source device characterized in that temperature detecting means for detecting the temperature of the low temperature chamber is provided on the outer wall of the heat source device.