JPH0451322Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine heat pump device having a structure in which a heat pump powered by an engine is covered in a soundproof box in a nearly hermetically sealed state.

[Prior Art] Generally, an engine heat pump device is used as a facility machine by being placed in a soundproof box to prevent noise from the engine, etc. A heat pump with such a structure is, for example, developed in U.S. Pat.
As shown in Japanese Patent No. 65376, an engine, a compressor, a heat exchanger, etc. are arranged in a soundproof box formed in a box-like structure, and the unit as a whole is constructed.
This soundproof box has an intake port that communicates the inside and outside of the soundproof box, for supplying new air for driving the engine and discharging exhaust gas, and for avoiding heat buildup inside the soundproof box. It had a structure with an exhaust port.

[Problem to be solved by the invention] However, with such conventional engine heat pump devices, there is a problem in that the heat energy inside the soundproof box is wasted to the outside by heat generating elements such as the engine and compressor. Ta.

However, in order to effectively utilize the thermal energy inside the soundproof box, for example, as disclosed in Japanese Utility Model Application Publication No. 57-72070, only an opening 24 for introducing combustion air can be used to connect the inside and outside of the soundproof box 32. If this happens, the ventilation inside the soundproof box will be insufficient and heat will build up inside the box, or if the outside temperature becomes high, the inside of the soundproof box will become hot and the intake air to the engine will become hot. There is a problem in that the temperature increases and the charging efficiency decreases, resulting in a decrease in engine output and a decrease in the efficiency of the entire system.

On the other hand, an exhaust port is provided in the soundproof box, and this exhaust port and the outside air inflow side of the evaporator are communicated with an exhaust duct analogous to, for example, the exhaust gas discharge tube 12 disclosed in Japanese Patent Application Laid-Open No. 58-52949. Although it is possible to eliminate heat buildup inside the soundproof box, it does not actively encourage ventilation, so the heat recovery efficiency is poor.

The present invention was developed by focusing on these conventional problems, and it effectively utilizes the thermal energy emitted by heat generating elements such as engines and compressors inside the soundproof box, and also makes the inside of the soundproof box sufficiently large. The object of the present invention is to provide an engine heat pump device that can improve the output of an engine by providing ventilation to the engine and supplying cold air.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an air heat source in which a compressor, a condenser, an expansion valve, an evaporator, etc. driven by an engine are integrally assembled in a soundproof box. In the heat pump device, an evaporator is disposed at the upper part of the outside of the soundproof box, an evaporator blower is provided for blowing outside air to the evaporator, and the evaporator is located upstream and downstream of the evaporator through which the outside air flows. an exhaust duct that is provided with an exhaust port and an intake port that communicate with the inside of the soundproof box, respectively, and that communicates the exhaust port and the intake port with a portion of the inflow side and outflow side of the outside air of the evaporator, respectively; and an air intake duct, a ventilation blower for introducing the air cooled by the evaporator into the soundproof box is installed at the intake port, and an air cleaner attached to the engine is installed downstream of the ventilation blower. It is equipped with an outside air intake port.

[Operation] Next, the operation will be explained. In this invention, an evaporator is installed on the outside upper part of a soundproof box, and outside air is blown into the evaporator by a blower, so that the refrigerant exchanges heat with the air in the evaporator. Since the inflow and outflow sides of the evaporator are partially provided with exhaust ducts and intake ducts that communicate with the inside of the soundproof box, the outside air flowing in by the blower is cooled while passing through the evaporator. A portion of the air flows into the soundproof box from the air intake duct through the air intake port. Therefore, since the cooled outside air is supplied as intake air to the engine, the output of the engine can be improved. In addition, the hot air emitted by the heat generating elements such as the engine and compressor inside the soundproof box is sent from the exhaust port through the exhaust duct to the evaporator, where the heat is recovered, and some of it is sent to the outside and other parts. A portion of the air is again circulated from the air intake duct into the soundproof box through the air intake. A ventilation blower that introduces air cooled by the evaporator into the soundproof box is installed at this intake port, so that the heat energy emitted by the heating element inside the soundproof box can be used effectively and the air can be prevented. The sound box can be sufficiently ventilated. Furthermore, since the outside air intake port of the air cleaner attached to the engine is installed downstream of the ventilation blower, the cooled air can be taken in as intake air for the engine.
The filling efficiency improves accordingly.

[Examples] Examples of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 and 2 relate to a first embodiment of the present invention, with FIG. 1 being a longitudinal sectional view illustrating an engine heat pump device, and FIG. 2 being a system diagram of the engine heat pump device.

In these figures, reference numeral 1 indicates a unitized engine heat pump device, and this engine heat pump device 1 includes an engine 2, a compressor 3 driven by the engine 2, a water-cooled condenser 4, and an expansion valve. 5, an evaporator 6, a cooling water heat exchanger 7 and an exhaust gas heat exchanger 8 connected to the engine 2, a soundproof box 9, etc. The evaporator 6 is placed on the outside of the soundproof box 9, and the other devices and the like are placed inside the soundproof box 9. The refrigerant circulation path of the engine heat pump device 1 forms a cycle in which the refrigerant circulates from the high-pressure side of the compressor 3 to the low-pressure side of the compressor 3 via the water-cooled condenser 4 → expansion valve 5 → evaporator 6. . The cooling water heat exchanger 7 is connected to the cooling water circulation path of the engine 2 to recover heat generated by water cooling of the engine 2. Moreover, the engine 2
The exhaust gas heat exchanger 8 is provided in the exhaust gas path. The exhaust gas is discharged from the exhaust gas heat exchanger 8 to the outside of the soundproof box 9 via a muffler 10. A soundproof box 9 is provided on the hot water (brine) inlet side of the water-cooled condenser 4.
It is connected to a buffer tank (not shown) via a pump 11 provided externally. The hot water circulation path is from the buffer tank to pump 11 → water-cooled condenser 4 → cooling water heat exchanger 7 → exhaust gas heat exchanger 8
A cycle is formed in which the water is circulated through the tank and then back to the buffer tank. The engine 2 is placed on a pedestal 13 provided on the floor 12 inside the soundproof box 9. An air cleaner 14 is attached to the intake system of the engine 2.

On the other hand, the soundproof box 9 is formed from a wall material made of a combination of sound absorbing material and sound insulating material into a substantially sealed box shape, and is designed to prevent noise from leaking out. Further, the evaporator 6 is arranged approximately at the center of the outer upper part of the soundproof box 9. An evaporator blower 15 is provided at a portion of the upper part of the soundproof box 9 facing the evaporator 6 to blow outside air to the evaporator 6. An exhaust port 16 and an intake port 17 that communicate with the interior of the soundproof box 9 are provided at the top of the soundproof box 9 located upstream and downstream of the evaporator 6 through which the outside air flows, respectively. An exhaust duct 18 and an intake duct 19 are provided so that the exhaust port 16 and the intake port 17 communicate with a portion of the outside air inflow side and outflow side below the evaporator 6, respectively.
That is, the exhaust duct 18 and the intake duct 19
is provided so that air flows through a portion of the lower side of the evaporator 6. Further, a ventilation blower 20 is provided at the intake port 17 inside the soundproof box 9. An outside air intake port of the air cleaner 14 is provided at a position substantially facing the ventilation blower 20.

In such a configuration, when the heat pump is operated, the evaporator blower 15 blows outside air to the evaporator 6.
The refrigerant exchanges heat with outside air in the evaporator 6. A part of the outside air that has passed through the evaporator 6 and has been cooled is sucked into the ventilation blower 20, and is passed through the air intake duct 19 and the air intake 17 to the soundproof box 9.
Flow inside. Then, a part of the cooled outside air is supplied from the air cleaner 14 as intake air to the engine 2, so that the output of the engine 2 can be improved. In addition, hot air emitted from heat generating elements such as the engine 2, compressor 3, and other equipment that circulates refrigerant or hot water installed in the soundproof box 9 is evaporated together with air from the exhaust port 16 through the exhaust duct 18. Sent to vessel 6. The heat is recovered in the evaporator 6, and part of it is discharged outside, and the other part is passed through the intake duct 19 to the intake port 17.
It circulates again into the soundproof box 9 through the. Therefore, the thermal energy emitted by the heating element inside the soundproof box 9 can be recovered, and the inside of the soundproof box 9 can be ventilated.

FIG. 3 is a longitudinal sectional view illustrating an engine heat pump device according to a second embodiment of the present invention. Note that the same parts and members as in the first embodiment are denoted by the same reference numerals.

This engine heat pump device 21 is provided with an intake duct 22 formed to open at a position downstream of the evaporator 6 and facing the evaporator blower 15. The other configurations are the same as the first embodiment.

In such a configuration, the outside air that has passed through the evaporator 6 is actively introduced into the soundproof box 9, and then passes through the exhaust port 16, the exhaust duct 18, and the evaporator 6 again.
It is discharged to the outside. Therefore, it functions in the same way as the first embodiment.

In the above embodiment, the exhaust port 1 is provided at the top of the soundproof box 9.
6 and an intake port 17,
It is sufficient that the soundproof box 9 is provided in the parts of the soundproof box 9 located upstream and downstream of the evaporator 6 through which the outside air flows.
Furthermore, the exhaust duct 18 and the intake duct 19 are not limited to the shapes of the embodiments as long as they are formed so that the air inside the soundproof box 9 passes through a part of the evaporator 6. Furthermore, the hot water circulation path and other systems can be arbitrary and are not limited to the embodiments.

[Effects of the invention] As explained above, according to the invention, all the air flowing out from inside the soundproof box passes through the evaporator.
The radiant heat from heat sources such as the engine and compressor inside the soundproof box is recovered by the evaporator, allowing effective use of thermal energy.

Further, since the air cooled by the evaporator is forcibly fed into the soundproof box by the ventilation blower, the inside of the soundproof box can be sufficiently ventilated.

Furthermore, since the outside air intake port of the air cleaner is installed opposite to the downstream side of the ventilation blower, the cold air cooled by the evaporator is immediately used as intake air for the engine, improving the filling efficiency of the engine. The output is improved, and the operating efficiency of the entire device can be improved.

[Brief explanation of the drawing]

1 and 2 relate to the first embodiment of the present invention, FIG. 1 is a longitudinal sectional view explaining the engine heat pump device, FIG. 2 is a system diagram of the engine heat pump device, and FIG. 3 is the main body of the present invention. FIG. 2 is a longitudinal sectional view illustrating an engine heat pump device according to a second embodiment of the invention. 1, 21...Engine heat pump device, 2
... Engine, 3 ... Compressor, 4 ... Water-cooled condenser, 5 ... Expansion valve, 6 ... Evaporator, 9 ... Soundproof box, 14 ... Air cleaner, 15 ... Blower for evaporator, 16 ... Exhaust port, 17...Intake port, 18...
...Exhaust duct, 19, 22...Intake duct, 20
...Blower for ventilation.

Claims (1)

[Claims for Utility Model Registration] A compressor, condenser, expansion valve, evaporator, etc. driven by an engine are assembled into a soundproof box.
In a heat pump device that uses air as a heat source, an evaporator is disposed at the upper part of the outside of the soundproof box, an evaporator blower for blowing outside air is provided on the evaporator, and the upstream and downstream sides of the evaporator through which the outside air flows are provided. An exhaust port and an intake port that communicate with the inside of the soundproof box are provided in the soundproof box portions located on the sides, and the exhaust port and the intake port communicate with parts of the outside air inflow side and outflow side of the evaporator, respectively. An exhaust duct and an intake duct are provided, and a ventilation blower for introducing air cooled by the evaporator into the soundproof box is provided at the intake port, and a ventilation blower is provided downstream of the ventilation blower and is attached to the engine. An engine heat pump device characterized by having an outside air intake port for an air cleaner installed oppositely.