JPS5969672A - Heat source device utilizing engine driving type heat pump - 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] The present invention relates to a water heater, an air-conditioning device, or a device used as a heating heat source for a greenhouse, etc. Specifically, the invention relates to a refrigerant circuit equipped with a refrigerant compressor driven by an engine. A condenser that heats the heated fluid through heat exchange with compressed refrigerant? The present invention relates to a heat correction source device using an engine-driven heat pump, which is equipped with an exhaust heat recovery device that heats a fluid to be heated using the exhaust heat of the engine.

A heat source device using a power-driven heat pump is not only used as a drive device for an engine-t heat pump, but also provides a moderate and sufficient load to the engine by driving a compressor by the engine, and is also used for the engine itself. This system is designed to make effective use of the secondary waste heat of the fluid, thereby increasing the heating efficiency of the fluid to be heated.However, unlike conventional systems, the condenser is always , heating and cooling equipment, greenhouses, etc.), the low-temperature heated fluid from the heating/cooling system U, greenhouse, etc.) is configured to supply low-temperature heated fluid. During steady operation, as mentioned above, the engine
Although it is possible to guarantee the heating effect of the heated fluid by the exhaust heat recovery device by applying a sufficient load, the temperature of the low-temperature heated fluid is low and the condensation temperature is also low, and the compressor load is lower than the load during steady operation. 2 or less at the beginning of operation, the load applied to the engine by the compressor drive is still small, and the amount of heat generated by the engine is small. However, since the temperature increase rate itself is slow, the increase in engine load is also rate-limiting, and therefore, after the start of operation, it takes a long time to raise the temperature of the heated fluid to the set temperature, resulting in poor start-up performance. Ta.

The present invention aims to overcome the drawbacks of the conventional mechanism.
” has a purpose.

The heat source device using an engine-driven heat pump according to the present invention has a first state in which all of the low-temperature heated fluid from the load device d is supplied to the condenser without using the exhaust heat recovery device;
A heated fluid supply control mechanism is provided that can freely switch to a second state in which all of the heated fluid is supplied after being heated by the exhaust heat recovery device. Characteristics: According to the characteristic configuration of the present invention, the control mechanism changes the second state in which the heating fluid from the exhaust heat recovery device is supplied to the condenser; The condensing temperature increases rapidly, ■ The compressor load increases rapidly in proportion to this increase in condensing temperature, and ■ The engine heat generation is also sufficient to support this increase in compressor load. ■ Furthermore, due to this increase in engine heat generation, it is possible to increase the rate of temperature rise of the heated fluid supplied to the condenser. , and the rate of increase in condensing temperature can be further increased.

Therefore, according to the present invention, by switching the heated fluid supply control mechanism to the first state at the beginning of operation, it is possible to reduce the load applied to the engine by driving the compressor in a short time after the start of operation. The total set temperature VC of the heated fluid heated by the exhaust heat recovery device is increased by increasing the heat generation ttV.
It can rapidly raise the temperature to
However, during steady operation, it is necessary to switch the heated fluid supply control mechanism to the first state. Is it also a heated fluid? The fluid to be heated can be heated most efficiently.

An uninvented embodiment will be described below with reference to FIG.

An engine-driven heat pump (B) that completely heats the circulating fluid to be heated (aJ fluid (generally water)) to the load device (A) (water heater, air-conditioning device, greenhouse, etc.); +II exhaust heat is used to soundly heat the heated fluid.
Configure a heat source device.

The heat pump (Bl) is a refrigerant circuit (BL) equipped with a refrigerant compressor (2) driven by the engine fl+, a condenser (3) that heats the fluid to be heated by heat exchange with the compressed refrigerant, and an expansion It is configured by being connected to a valve (4) and an atmospheric thermogram type evaporator (5).

The condenser (3) and the exhaust heat recovery device'dt (C) are:
The heating fluid supply path (a) is connected in parallel to the heated fluid supply path (a).

Engine 10+11 is a water-cooled engine.

The exhaust heat recovery device t (C) includes a first heat exchanger (6) that heats the fluid to be heated with the cooling water of the engine +11, and a first heat exchanger (6) that heats the fluid to be heated with the cooling water of the engine +11, and a first heat exchanger (6) that heats the fluid to be heated with the cooling water of the engine +11, and a
The second heat exchanger (7) heats the fluid to be heated by the exhaust gas.

In (8), the heated object is the r-body supply pump.

A first state in which the low-temperature heated fluid from the load device (AJ) is supplied to the condenser (3), and a high-temperature heated fluid after being heated by the exhaust heat recovery bag (σtC+) A heated fluid supply !li control mechanism (9) is provided which can freely switch between a second state in which K is supplied to the condenser 131.

The control mechanism 19) provides a flow path (DA) k that connects the heated fluid outlet of the exhaust heat recovery device (Cl) and the heated fluid inlet of the condenser 11 (31), and also The fluid to be heated after passing through the condenser (31) and the exhaust heat recovery device (Cl) is combined and supplied to the load device (Al). 1-state name, exhaust heat-1 collection device tcJ, flow path (9A),
The condenser (31) is provided with a flow path switching valve group (9B...) that can freely switch between the second state and the second state in which the acid 1 is supplied sequentially.
6 device (3) A sensor (9C) that detects the temperature of the heated fluid at inlet 1, and based on the detected temperature of this sensor (9C), automatically and completely Conversely, a controller (9D) for switching the switching valve group (9B'') of the flow path from the first state to the second state is also provided.

According to the configuration of the above embodiment, during the operation υ period V when the heated fluid temperature is below the set value, the control mechanism (9) is switched to the 1st state, and the heated fluid temperature is within the set value range. During steady operation, when the temperature is high, the control mechanism (9) switches to the first state, and at the beginning of operation, the heated fluid heated by the exhaust heat recovery device (C) is transferred to the condenser (3). As a result, the condensing temperature increases, and the load applied to the engine il+ increases due to the drive ω1 of the compressor 12). In other words, the amount of heat generated by the engine tl+ increases. , ■ In addition, the temperature of the heated fluid that is heated by the exhaust heat recovery device (C) and supplied to the condenser (31) increases, and ■ As a result, the condensation temperature increases. The rise in temperature contributes to the temperature rise of the heated fluid, and
The temperature of the heated fluid increases to the set value in a short period of time after the start of operation, as the temperature of the heated fluid increases and the condensation temperature increases.

On the other hand, during steady operation, a moderate load is applied to the engine +l+ by driving the compressor (2), and the exhaust heat recovery bag @ (
(While heating the fluid to be heated at J, the condenser +3
Also in No. 1, the fluid to be heated is heated, and the fluid to be heated is efficiently heated.

FIG. 2 shows another embodiment, in which the control mechanism (9) 7
It is structured as follows.

In other words, a flow path (9A) similar to that of the embodiment is provided, and a first state in which the fluid to be heated is supplied to the condenser (3), the flow path (9A), and the exhaust heat recovery device (C) in this order; Collection device (
C), a valve seal that can be freely switched between the flow path (9AJ, condenser 13) and the second state in which the fluid to be heated is supplied in order −(
9C) and the detected value of this sensor (9C'), when the detected value becomes below the set value...
A control mechanism (9) is provided by providing a controller (9D) that automatically and reversibly switches the state (0) to the second state.
In addition, since the other structures are the same as those in the embodiment, the structural description will be omitted because the same numbers will be attached.In addition, in the embodiment, the heated fluid heated in the condenser (3) and the discharged Although one heat source was constructed by supplying the heated fluid heated by the heat recovery device (C) to a common load device (AJ), the present invention provides the dual wave heating fluid and separate load devices. It is also possible to configure two heat sources by supplying heat to

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram showing an embodiment, and FIG. 2 is a piping system diagram showing another next embodiment. tl+... Engine, (2)... Refrigerant compressor, (bJ... Refrigerant circuit, (3)...
...Condenser, (C1...Exhaust heat recovery device, (A)
... Load device, (9) ... Heated fluid supply control mechanism O

Claims (1)

[Scope of Claims] ■ A refrigerant circuit tel K equipped with a refrigerant compressor C2) driven by an engine fl+, a condenser+BI 'i that completely heats the fluid to be heated by heat exchange with the compressed refrigerant, and the A heat source device using an engine-driven heat pump, which is equipped with an exhaust heat (b) recovery device (C)' that heats the fluid to be heated with the exhaust heat of the engine (1), is loaded on the condenser fall. A first state in which the low-temperature heated fluid from the device (A) is supplied without passing through the cell waste heat recovery device (CJ), and a high-temperature heated fluid heated by the waste heat recovery device tcJ is supplied. A heat source device using an engine-driven heat pump, characterized in that it is equipped with a heated fluid supply control mechanism (9) k that can be freely switched between a U-shaped spoon and a heated fluid supply control mechanism (9). When the pressure or temperature of the refrigerant or the temperature of the heated fluid supplied to the condenser (3) falls below a set value, the system automatically and reversibly switches to the second state. A heat source device using an engine-driven heat pump according to claim 0. ■ The condenser 181 and the exhaust heat 11j collection device 1cJ are
The heat source device using an engine-driven heat pump according to claim 0 or 0, wherein the load device (AJ and the heated fluid supply path (aJK) is connected in parallel.