JPS58145861A - 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 heat pump used as an air conditioner, a water heater, etc., and more specifically, the present invention relates to a heat pump that is used as an air conditioner or a water heater. The present invention relates to an engine-driven heat pump configured to circulate the flow over the pressure NIIA.

The engine, which is the driving source for this type of heat pump, is used under conditions of high ambient temperature, such as in an empty place such as a machine room, or in a place where other heat pumps exist in the vicinity of the engine. You may have to
If the engine is used in such a high-temperature atmosphere, the same phenomenon as when the engine is operated under overload will occur, resulting in poor combustion and increased exhaust temperature, resulting in reduced maintenance periods for the piston, piston rings, and cylinders, and increased maintenance work time.
There was a drawback that the service life was likely to be shortened.

In addition, it is known that a dedicated cooling device for cooling the heat pump is installed separately due to maintenance and durability, but this not only increases the size of the entire heat pump but also increases the running cost. It has the disadvantage of being expensive.

In view of the above-mentioned circumstances, the present invention has the following points: to advantageously suppress combustion defects and exhaust temperature increases caused by engine operation in high-temperature atmospheres in terms of structure and running costs. The eighth purpose is to increase the output of the engine equipped with the embroidery machine.

Since the engine-driven heat pump according to the first aspect of the present invention turns the combustion air taken into the engine into mold, even if the engine is driven under high-temperature atmospheric conditions, the heat exchange section By heat exchange between the refrigerant after passing through the condenser and the combustion air, the combustion air can be cooled using the latent heat of vaporization of the refrigerant. Therefore, local improvements to the refrigerant circulation path and the intake path are sufficient, compared to the case of installing a special water-cooled cooling device as in the past.
It has now been possible to sufficiently suppress combustion defects and increases in exhaust temperature caused by engine operation in a high-temperature atmosphere, while being advantageous in terms of structure and running costs.

In the eighth invention, the supercharged engine is provided with a heat exchange section capable of cooling combustion air taken into the engine by heat exchange with the refrigerant after passing through the condenser. This not only makes it possible to suppress the exhaust temperature rise during poor combustion caused by engine operation under high-temperature atmospheric conditions, but also suppresses the increase in exhaust temperature even when the ambient temperature is within the set range.
It is possible to suppress the temperature rise of the combustion air caused by supercharging by heat exchange in the heat exchange section, and it is possible to increase the density of the charge air, improve the charging efficiency, and increase the output of the engine. reached.

Embodiments of the present invention will be described below based on the drawings.

To configure the refrigeration cycle of an engine-driven heat pump, as shown in Figure 1, a clutch (
2) condenses the pressurized refrigerant from the compressor (3) coupled through the compressor (3)!!+43, configured to circulate and flow through the expansion valve (5), the evaporator (6) and the compressor (3). are doing.

In this heat pump, the evaporator (6) or the evaporator (6) utilizes the latent heat of condensation of the refrigerant during heat exchange in the *is m ta+ as a heat source for space heating or hot water supply.
The latent heat of evaporation of the refrigerant during heat exchange is used as a cooling source for frozen meat.

Thus, a part of the refrigerant passage between the condenser (4) and the expansion valve (5) and the refrigerant passage between the evaporator (61 and compressor 31) is The engine (1)
The intake manifold (CIA) is connected late to the nine intake pipes (7
) with a bypass passage (
9), and with the pipe portion of this bypass passage (9) located within the IfJIE intake pipe 17), the engine (II
K constitutes a heat exchange section αG that cools the intake combustion air by heat exchange with the refrigerant after passing through the ** device (4) and evaporates the refrigerant.

A sensor α°C is provided to detect when the combustion air sucked into the intake pipe (7) rises above the set temperature (for example, 25°C, 80°C). The expansion valve (2) and the sensor (11) are located on the upper side of the throttle device (9) in the direction of refrigerant flow.
! A solenoid valve Ω that is automatically and reversibly opened based on I.
is intervening.

When the temperature of the combustion air taken into the engine fil K rises above the set temperature, the solenoid valve I is activated by the sensor 0.
The condenser (4) is automatically opened based on the detection result of υ.
) A part of the refrigerant after passing through is supplied to the heat exchange section ao through the bypass path (9). Through heat exchange in this heat exchange section αG, the combustion air can be cooled using the latent heat of vaporization of the refrigerant, so it is possible to avoid combustion defects and increases in exhaust temperature caused by engine operation in a high-temperature atmosphere. can.

The squeezing device (8) is composed of a capillary tube.

In the above embodiment, the opening and closing of the electromagnetic pulp Ω was controlled based on the temperature detection of the intake combustion air.
As shown by the two-dot chain line in the figure, the exhaust gas temperature is set at the set temperature (
For example, a device may be configured to control the opening and closing of the electromagnetic pulp a3 based on 11 detection results of a device that detects that the temperature has risen to 450° C. or higher.

First, a proportional control valve is used in place of the opening/closing solenoid valve u3, and the detected temperature of the intake combustion air or exhaust gas is compared with the set temperature, and the temperature is increased based on the comparison result. The operation of the proportional control valve I is controlled, and the heat exchange section (IG
It may be configured and implemented to adjust the amount of refrigerant supplied to.

FIG. 8 shows another embodiment, in which the bypass passage (9) equipped with the heat exchanger αG is connected to the evaporator (6) and the compressor ta+
A late connection is made to the refrigerant passage portion of the cabinet, and an electromagnetic three-way valve a- is interposed at the upper connection portion of this bypass path (9). In this case, since the combustion air can be cooled by the low-temperature saturated or superheated vapor refrigerant at the outlet of the evaporator (6), the number of expansion valves (2) can be reduced compared to the above embodiment.

Figures 3 to 6 respectively show the exhaust manifold (IB) K of the engine (1), the connected exhaust pipe (to), and the intake pipe (
Fig. 7 shows an implementation of the second invention in which a supercharger (to) is provided over 71 and 71.

The embodiment shown in the mS diagram has the condensing valve 5 (4) and the expansion valve (5
1 and the refrigerant passage portion between the evaporator (6) and the compressor +
31, the air for combustion is drawn in by the supercharger (toward) and condensed. A bypass passage (9) equipped with an exchange part - is connected late, and an expansion valve αη and a solenoid valve (to) are interposed on the upper side of the heat exchange part Q (1) of the bypass passage (9), In addition, a solenoid valve part is interposed on the lower side.

The embodiment shown in FIG. 4 shows a modification of the heat pump explained in FIG. Electromagnetic valves (1) and (2) are interposed near the refrigerant flow path portion and the upper connection portion of the bypass path (9), which are connected to the flow path portion and located between the connection portions of the bypass @(9).

The embodiment shown in FIG.
1, the refrigerant flow path section between the evaporator (6) and the compressor (3)
A nine bypass path (9) is provided with an expansion valve and a solenoid valve over the refrigerant flow path between
a first heat exchanger (IOA) that exchanges heat between the refrigerant that has passed through the expansion valve (2) of the bypass path (9) and the heat transport medium;
A condenser (
4) A heat exchange section is configured that cools the heat transport medium using the latent heat of vaporization of the refrigerant after passing through it, and indirectly cools the intake combustion air via this medium.

In the figure (to) is a pump that forcibly circulates the heat transport medium.

The embodiment shown in FIG. 6 shows a modification of the nine heat pumps described in FIG.
A bypass path (9) equipped with an exchanger (IOA) is connected to the refrigerant flow path section between the evaporator (6) and the compressor (31), and a A solenoid valve (2) is also interposed in the refrigerant flow path.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of an engine-driven heat pump, and FIGS. 2 to 6 are piping system diagrams showing large-scale embodiments. (1)...Engine, (,31...Compressor, (4)...Condenser, (5)...
Expansion valve, (6) evaporator, (to)... heat exchange section,
(Ill, (11...detection device, (to)...
...supercharger. Agent Patent Attorney Osamu Nanamura Figure 2 Figure 3 One Figure 4 “□□-

Claims (1)

[Claims] ■ Pressurized refrigerant from the compressor +31 driven by the engine (1) is transferred to the condenser (4), expansion valve (5), and evaporator (6).
In the engine-driven heat pump, the combustion air taken into the engine (1) is heat exchanged with the refrigerant after passing through the condenser (4). An engine-driven heat pump that is equipped with a heat exchanger saG that can be operated/& quickly. ■ The heat exchanger 5 (2) is configured to be switchable between an active state and a non-active state. The engine-driven heat pump according to claim 0. ■ The engine according to claim 0 or 0, wherein the heat exchange means in the heat exchange section αG is a direct heat exchanger. Drive-type heat pump. ■ Claim 0 or 2, wherein the heat exchange means in the heat exchange section αG is an indirect heat exchange using a heat transport medium.
The heat exchanger [1G is based on the detection result of the device #J1 that detects that the humidity has risen above the set level]. The engine-driven heat pump according to claim 0, wherein the engine-driven heat pump is configured to be automatically and reversibly switched to the operating state. ■ The heat exchanger is configured to automatically and reversibly switch to the cooling effect based on the detection result of step 11, which detects when the engine exhaust temperature rises above a set value. The engine-driven heat pump according to claim 0. ■ The pressurized refrigerant from the compressor (3) driven by the engine (1) having a supercharger (Ill) is transferred to the condenser (4). , the expansion valve (5), the evaporator (6), and the compression valve (6), and the combustion air taken in by the supercharger (18). An engine-driven heat pump characterized in that the engine-driven heat pump is provided with a heat exchange section (2) capable of performing cooling by heat exchange with the refrigerant after passing through the condenser (41).