JPH0282065A - Engine drive heat pump type temperature conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a temperature control device using an engine-driven heat pump, and more specifically, to an engine-driven heat pump that makes efficient use of a hot water circulation circuit made of engine cooling water. It relates to a heat pump type temperature control device.

[Prior art]

In an engine-driven heat pump type temperature control device, the applicant has proposed not only a temperature control device using a refrigerant circulation circuit that forcibly circulates refrigerant, but also a hot water system that forcibly circulates warm engine cooling water that incorporates engine exhaust heat. We have already proposed a system that uses a temperature controller using a circulation circuit.

This temperature control device effectively utilized the engine's exhaust heat and efficiently utilized the engine's energy. However, as the usage of temperature control devices becomes more diverse,
In cases where only the hot water circulation circuit of the engine is used and temperature control by the refrigerant circulation circuit is not necessary, the problem remains that the energy consumed by the refrigerant circulation circuit is wasted. .

[Problem to be solved by the invention]

An object of the present invention is to provide an engine-driven heat pump type temperature control device that enables more efficient use of a hot water circulation circuit in the use of the diversified temperature control devices described above.

[Means to solve the problem]

To achieve the above object, the present invention includes a refrigerant circulation circuit in which an indoor temperature controller is connected to a circuit for forced circulation of refrigerant pumped from an engine-driven compressor, and a separate circuit for forced circulation of engine cooling water. A hot water circulation circuit connected to a heat dissipation section is provided, and a heat exchanger is provided in the hot water circulation circuit to transfer heat from at least the refrigerant to the hot water side by a branch circuit branched from the refrigerant circulation circuit. It is characterized in that the refrigerant in the refrigerant circulation circuit can be switched to the branch circuit depending on the amount of heat.

〔Example〕

The present invention will be explained below with reference to Examples.

FIG. 1 shows an engine-driven heat pump type temperature control device according to the present invention, and block I surrounded by a chain line is a power unit;
is an outdoor heat exchange unit, ■ is a branch unit, and ■ is an indoor heat exchange unit. The indoor heat exchange unit (rV) is equipped with one or more branched temperature controllers depending on the temperature control capacity required for the room and the room units divided into multiple units. The branch unit I [I is connected to the outdoor heat exchange unit II.

The power unit I is provided with an engine 1 operated by gas fuel, and a compressor 2 connected to the engine 1 via a clutch 3. The compressor 2 compresses a refrigerant such as chlorofluorocarbon into a high-temperature, high-pressure gas, which is circulated through a refrigerant circulation circuit equipped with a temperature regulator, which will be described later. Further, the engine 1 is configured to forcibly circulate engine cooling water to a hot water circulation circuit equipped with a temperature controller, which will be described later. The cooling water jacket of the engine 1 serves as a heat exchanger 4 in the hot water circulation circuit, and the exhaust pipe is also provided with a heat exchanger 5 that uses exhaust gas.

The outdoor heat exchange unit ■ has a discharge pipe 6 from the compressor 2.
A four-way switching valve 8 is provided between these two pipes, and two pipes 9, 1 are connected to the four-way switching valve 8.
0 constitutes a refrigerant circulation circuit. Temperature sensors 4 are provided in the discharge pipe 6 and suction pipe 7, respectively.
0.44 and pressure sensors 41.43 are provided. This refrigerant circulation circuit can be used for either heating operation or cooling operation by switching the refrigerant circulation direction, but this figure shows the heating operation, in which the refrigerant is discharged from the pipe 9 as shown by the arrow, and the refrigerant is discharged from the pipe 10 as shown by the arrow. I'm trying to change it back to .

In this heating circulation, the pipe 9 is branched
It is branched into a plurality of branch pipes 11, -, 11 at I[, and is connected to the pipes 12.・・・－，
12. Indoor heat exchangers 13 that function as refrigerant condensers are connected to the pipes 12, respectively, and radiate condensed heat indoors. Discharge side piping 1
2 is again connected to the branch pipe 14 of the branch Uniso+-m, and then converged into one pipe 15 in the outdoor heat exchange unit (2). The branch pipe 14 is provided with a control valve Va that is opened and closed under automatic control. This control valve V
A also has the function of an expansion valve. Next, the pipe 15 of the outdoor heat exchange unit H is connected to a receiver 16, and from there via a pipe 18 to an outdoor heat exchanger 19 that acts as an evaporator, and returns to the pipe 10. The pipe 18 is provided with an expansion valve 17 that adiabatically expands the refrigerant.

The above is a case of heating operation, but in cooling operation, the refrigerant may be circulated in the opposite direction to the direction of the arrow by switching the four-way switching valve 8.

In this cooling operation, contrary to the above heating operation, the indoor heat exchanger 13 acts as an evaporator and removes evaporation heat from the room, and the outdoor heat exchanger 19 acts as a condenser.

On the other hand, in the hot water circulation circuit that circulates engine cooling water, the hot water is forced to circulate by a cooling water pump 20 provided in the outdoor heat exchange unit +-n. The exhaust heat of the engine is absorbed by the engine cooling water by the heat exchanger 4.5, and the pipe 21 coming out from here is connected to the pipe 22 in the outdoor heat exchanger UNISO+-n, and then branched into two pipes 23 and 24. . One of the pipes 23 is connected to a radiator 26 via a control valve 25 that is automatically controlled to open and close, and is connected to an air separator 27. Cooling water pump 20. After passing through the heat exchanger 33, the exhaust heat from the engine is circulated again to the heat exchanger 4.5.

The other pipe 24 is branched into a plurality of branch pipes 28, -, 28 at the branch unit m, and each of the pipes 24 is connected to a pipe 2929 in the indoor heat exchange unit (2). In this embodiment, a floor heating panel 3 provided as a heat dissipation section
The hot water is passed through at 0° and 30°. The discharge side pipe 29 is again connected to the branch pipe 31. of the branch unit (2). -,
31, the air is converged into the pipe 32 of the outdoor heat exchange unit (2), and is arranged to join the same air separator 27 as described above.

This hot water circulation circuit includes a high-temperature side temperature sensor 46 on the piping 22 from which the heated hot water departs, and a floor heating panel 30 on the high temperature side.
A temperature sensor 47 on the low temperature side is provided in the pipe 31 through which the hot water passes after being radiated.

The heat exchanger 33 provided in the hot water circulation circuit draws refrigerant from a circuit branched from the refrigerant circulation circuit, and transfers heat from at least the refrigerant to the hot water side. That is, the heat exchanger 33 receives refrigerant as a heat source from a pipe 34 branched from the pipe 9 of the refrigerant circulation circuit, and the refrigerant is passed through the pipe 35 to the receiver 16.
We are trying to supply it to The piping 35 is provided with a control valve vb that is automatically controlled to open and close, and this control valve vb also functions as an expansion valve. As for the piping branched from the refrigerant circulation circuit, as described above, the piping 9
Instead of branching directly from the discharge pipe 6, the pipe 34' may be branched directly from the discharge pipe 6.

As described above, the temperature control device is mainly composed of a hot water circulation circuit and is equipped with a heat exchanger 33 that transfers heat from the refrigerant to the hot water side.
, by controlling the opening/closing of Vb and controlling the clutch 3 on/off, the indoor heat exchanger 13 (air conditioner) and the floor heating panel 30 (floor heating) are selectively operated as shown below, resulting in efficient operation. It is possible to perform heating operation.

This operation mainly consists of the hot water outgoing temperature To detected by the temperature sensor 46 and the hot water return temperature T detected by the temperature sensor 47.
A microcomputer (not shown) can be used as the control section by using signals detected by the temperature sensor 40, 41 and pressure sensors 42, 43 provided in the refrigerant circulation circuit, if necessary.

Further, this control may be performed repeatedly by setting a timer at intervals of 10 minutes, for example.

(1) Indoor heat exchanger 13 (air conditioner) and floor heating panel 3
0 (floor heating) at the same time, control valve Va is opened and control valve Vb is closed.

As a result, the refrigerant does not flow to the heat exchanger 33, and heat is supplied only to the indoor heat exchanger 13 to perform air conditioning. on the other hand,
Hot water is taken from the engine (E/G) through heat exchanger 4.5.
) is supplied to the floor heating panel 30 for floor heating. However, if the control valve vb is controlled to be slightly opened at this time, part of the heat of the refrigerant can be transferred to the hot water side.

(2) When only the floor heating panel 30 (floor heating) is operated under high load, the control valve Va is closed and the control valve vb is opened.

As a result, the refrigerant is transferred to the indoor heat exchanger 13 (air conditioner).
It does not flow to the heat exchanger 33, but flows only to the heat exchanger 33, transferring heat to the hot water side. Therefore, all the heat of the hot water, including engine exhaust heat, is supplied to the floor heating panel 3o and used for floor heating.

(3) When only the floor heating panel 30 (floor heating) is operated under low load, the clutch 3 is turned off and the engine 1 is placed in an idling state.

This causes the compressor 2 to stop, so the refrigerant does not circulate.
Only hot water and engine exhaust heat are supplied to the floor heating panel 30 and used for floor heating.

In selectively operating the above three, for example, the hot water inlet temperature To is 60° C. to 80° C., and the engine speed during idling operation is 1200 r, p, m.

An example of control when performing floor heating is shown in Figure 2A.
, B can be operated. RTS in the flowchart means returning to S (start), and A in FIG. 2A means continuing to A in FIG. 2B.

In addition, in the above temperature control device, if three-way control valves Vc and Vd are provided between the pipes 10 and 35 and between the pipes 10 and 34, respectively, as shown in FIG. When the hot water is made to flow in the direction of the refrigerant, heat transfer from the hot water to the refrigerant side can be made possible. Therefore, by controlling these control valves, it is possible to transfer heat from both directions between the hot water and the refrigerant, thereby making it possible to perform more diverse temperature control operations. Furthermore, with this specification, if the exhaust heat from the heat pump during cooling operation is used for hot water storage, etc., even more diverse operations become possible.

As mentioned above, depending on the temperature control device↓f, the heat dissipation part of the hot water circulation circuit and the temperature control machine of the refrigerant circulation circuit are mainly used to use the former in a variety of ways and to use energy more efficiently. Be able to drive.

In the above embodiment, the heat dissipation part of the hot water circulation circuit is exemplified as a floor heating panel, but instead of this, or in combination with this, a fan convector, hot water tank, dryer, etc.
You may also use a reheater.

〔Effect of the invention〕

As described above, the temperature control device of the present invention has a refrigerant circulation circuit that connects an indoor temperature controller to a circuit that forcibly circulates refrigerant pumped from an engine-driven compressor, and a circuit that forcibly circulates engine cooling water. A heat exchanger is provided in the hot water circulation circuit to which a heat radiating section is connected, and a heat exchanger is provided in the hot water circulation circuit to transfer heat from at least the refrigerant to the hot water side by a branch circuit branched from the refrigerant circulation circuit. Since the refrigerant in the refrigerant circulation circuit can be switched to the branch circuit by 4 degrees according to the required amount of heat, when the hot water circulation circuit is used in various uses of the temperature control device,
It becomes possible to actively utilize the energy of the refrigerant circulation circuit, and it becomes possible to utilize it more efficiently.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an energy-driven heat pump type temperature control device according to an embodiment of the present invention, and FIG. B is a flow diagram showing an example of operating the device. DESCRIPTION OF SYMBOLS 1...Engine, 2...Compressor, 3...Kura Sochi, 8...Four-way valve, 13...Indoor heat exchanger, 17.
... Expansion valve, 19... Outdoor heat exchanger, 20... Cooling water pump, 26... Radiator, 30... Floor heating panel, 33... Heat exchanger, Va, Vb... control valve.

Claims (1)

[Claims] There is a refrigerant circulation circuit in which an indoor temperature controller is connected to a circuit that forcibly circulates refrigerant pumped from an engine-driven compressor, and a hot water circulation circuit in which a separate heat radiator is connected to a circuit that forcibly circulates engine cooling water. , the hot water circulation circuit is provided with a heat exchanger configured to transfer heat from at least the refrigerant to the hot water side through a branch circuit branched from the refrigerant circulation circuit, and the refrigerant in the refrigerant circulation circuit is changed according to the required amount of heat in the room. An engine-driven heat pump type temperature control device that can be switched to the branch circuit.