JPH02238267A - Gas engine-driven space cooler/heater - Google Patents

Abstract

PURPOSE:To facilitate maintenance and inspection and to easily dispose a suction port and a discharge port of an engine by disposing a maintenance/ inspection position of the engine near an inspection port so that a small hole for inserting the suction port and discharge port of the engine is selectably provided. CONSTITUTION:An engine 10 and a compressor 13 are disposed under a square cylindrical case 40, a hot water storage tank 26 is disposed at its center, an outdoor heat exchanger 24 is disposed at its top, a fan 42 is disposed in the exchanger 24, an inspection opening 44 is formed at the lower part of the front face of the case 40 for forcibly introducing the atmospheric air to the exchanger 24, and maintenance/inspection position of an engine 10 is disposed near the opening 44. That is, a cover of an air cleaner 16, a lubricant level inspection window 54 are disposed near the opening 44. A cover plate is normally attached to the opening 44, and removed only at the time of maintenance and inspection. A small hole for introducing the atmospheric air into the cleaner 16 is formed at the cover plate. Thus, the positions of a suction port, a discharge port can be suitably altered.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gas engine-driven air conditioning system in which a heat pump compressor is driven by an engine that uses gas such as city gas or propane gas as fuel. (Background of the Invention) It has been considered to drive a heat pump compressor with an engine that uses gas such as city gas or propane gas as fuel, that is, a gas engine.

When the main parts of a heating and cooling system using a heat pump are housed in a single case to form a unit, it is desirable that maintenance and inspection be easy. For example, the main parts of a heat pump, excluding the indoor heat exchanger, may be housed in a single case to form a unit, and this unit may be installed outdoors, but depending on the installation location, this unit may be surrounded by walls, etc. on three sides. It is possible. For this reason, especially for engines that use gas engines, which require not only inspection and maintenance of the engine's air cleaner, oil filter, lubricating oil level, ignition plug, etc., but also lubricating oil lubrication and replacement. Inspection and maintenance may become difficult to perform, and the placement of the engine intake and exhaust ports may become difficult.

(Purpose of the Invention) The present invention has been made in view of the above circumstances, and it is possible to install this unit in a narrow place when the main parts of the heat pump, excluding the indoor heat exchanger, are housed in a case to form a unit. To provide a gas engine-driven air-conditioning and heating system in which the gas engine can be easily maintained and inspected, and the intake and exhaust ports of the engine can be easily arranged.

(Structure of the Invention) According to the present invention, the object is to house the main parts of the heat pump other than the indoor heat exchanger in a single rectangular cylindrical case in a heat pump in which the compressor of the heat pump is driven by a gas engine. , the maintenance and inspection parts of the gas engine,
A plurality of small holes are formed in each of the plurality of surfaces of the case so as to face the inspection opening provided in the case, and the small holes through which the intake port and the exhaust port of the gas engine are inserted can be selected. This is accomplished by a gas engine-driven heating and cooling system. The present invention will be explained in detail below based on the illustrated embodiments.

(Embodiment) Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2 and 3
The figure shows a partially sectional front view and left side view.

This embodiment uses heat generated by a gas engine to heat water and store hot water. In FIG. 1, reference numeral 10 is a water-cooled gas engine, and 12 is a compressor. The output of the engine 10 drives the compressor 12 via a clutch 14 (FIG. 1). Air is air cleaner 16
Gas as a fuel, for example, city gas, is supplied to the regulator 18, and a mixture of gas and air is generated in the regulator 18 and is inhaled into the engine 10. Note that this regulator 18 automatically controls the air flow rate and gas flow rate so as to keep the rotational speed of the engine 10 constant.

20 is a four-way switching valve, 22 is an indoor heat exchanger, and 24 is an outdoor heat exchanger, these and the compressor 12 form a closed loop, and this closed loop is filled with an appropriately selected working fluid. There is. Each member forming this closed loop,
The engine 10 forms a known heat pump.

This heat pump operates as follows. During cooling, the switching valve 20 is positioned as shown by the solid line in FIG.
Therefore, the working fluid that has become high temperature after being compressed by the compressor 12 is cooled by the outdoor heat exchanger 24 and then transferred to the indoor heat exchanger 22.
When it expands, it absorbs heat from the indoor air. Then, the cycle of being compressed again by the compressor 12 is repeated. In addition, during heating, the switching valve 20 is positioned as shown by the imaginary line in FIG. Vessel 2
It expands at step 4 and takes in heat from the outside air through adiabatic expansion. This working fluid then passes through the switching valve 20 and returns to the compressor 12, repeating the above cycle.

In FIG. 1, 26 is a hot water storage tank, and a heat exchanger 28 is disposed within this tank 26, and the cooling water for the engine 10 is circulated through this heat exchanger 28. That is, the water in this tank 26 is heated by the exhaust heat of the engine 10. Note that 30 is a valve for injecting water into this tank 26, and 32 is a valve that controls the amount of hot water flowing out from this tank 26. Reference numeral 34 denotes an auxiliary burner, which is ignited to heat the tank 26 when the amount of hot water used is large and the water temperature in the tank 26 drops.

This auxiliary burner 34, like the engine 10, uses gas as fuel.

In FIGS. 2 and 3, 40 is a square cylindrical case, and the engine lO and compressor 1 are disposed at the bottom of this case 40.
2, a hot water storage unit 26 is disposed in the center, and an outdoor heat exchanger 24 is disposed in the upper part. A fan 42 is disposed inside the outdoor heat exchanger 24 and the heat exchanger 2
4. Forcibly introduce outside air. An inspection opening 44 is formed in the lower part of the front of the case 40, and the maintenance and inspection parts of the engine 10 face this opening 44. That is, the lid of the air cleaner 16, the oil filter 46, and the lubricating oil filler port 4.
8. A lubricating oil drain plug 50, a spark plug 52, a lubricating oil level inspection window 54, etc. face the opening 44. A cover plate 55 is usually attached to the opening 44. (Fig. 3), and this cover plate 55 is removed only during maintenance and inspection. This cover plate 55
A small hole 56 is formed in the air cleaner 16 to introduce outside air to the air cleaner 16.

In Fig. 3, 58 is an exhaust heat exchanger, and 60 is an exhaust silencer. Exhaust gas discharged from the exhaust muffler 60 is discharged to the outside through a small hole 62 provided in the front of the case 40. Note that cooling water circulating between the engine 10 and the heat exchanger 28 is guided to the exhaust heat exchanger 58, and the exhaust heat is recovered here and used to heat water in the tank 26. In FIG. 2, 64 and 66 indicate the inlet and outlet of the cooling water to the engine 10, and 66a and 64a indicate the inlet and outlet of the cooling water to the heat exchanger 28 in the tank 26.

In this embodiment, the small holes 56 and 62 corresponding to the intake port of the air cleaner 16 and the exhaust port of the exhaust silencer 60 are provided on the front of the case 40, that is, on the same surface as the inspection opening 44, so that this unit can be mounted on three sides. This is convenient when installing in a narrow space surrounded by walls.

In addition, in FIGS. 2 and 3, 68a and 68b are the case 44.
This is a cap that covers a small hole provided on the left and right sides of the holder, and is attached at approximately the same height as the small hole 56. Also 7
Reference numerals 0a and 70b designate caps that are placed over small holes provided on the left and right sides of the case 44 so as to be approximately at the same height as the small hole 62. These caps 68a, 68b, 7
0a and 70b as appropriate and change the positions of the air intake port and exhaust port so that the air intake port of the air cleaner 16 and the exhaust port of the silencer 60 face the small hole that appears after removing the cap. The positions of the intake and exhaust ports can be changed appropriately depending on the installation location.

(Effects of the Invention) As described above, in this invention, the maintenance and inspection part of the gas engine is exposed to the inspection opening provided in the square cylindrical case, so that the maintenance and inspection of the engine can be performed from one place. Even when this device is installed in a narrow space, maintenance and inspection can be easily performed. In addition, small holes are formed on each of the multiple sides of the case, and the intake port and exhaust port of the gas engine can be inserted by selecting one of the small holes. The location of the opening and exhaust port can be changed appropriately.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are a partially sectional front view and left side view. DESCRIPTION OF SYMBOLS 10... Engine, 12... Compressor, 22... Indoor heat exchanger, 40... Case, 44... Inspection opening, 56, 62... Small holes 68, 70... A cap that covers the small hole.

Claims (1)

[Claims] In a heat pump compressor driven by a gas engine, the main parts of the heat pump except for an indoor heat exchanger are housed in one square cylindrical case, and the gas engine is maintained. The inspection part is made to face the inspection opening provided in the case, and small holes are formed in each of the plurality of surfaces of the case, so that it is possible to select the small holes through which the intake port and the exhaust port of the gas engine are inserted. A gas engine-driven air conditioning system characterized by: