JPS63247567A - Outdoor unit for engine-drive refrigerator - 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 Field of Industrial Application The present invention is directed to a dual/engine-driven cooling system, an air-conditioning system, or an air-conditioning/heating water supply system (hereinafter collectively referred to as an engine-driven refrigeration system) that uses gas or oil as a heat source. This relates to an outdoor unit.

BACKGROUND OF THE INVENTION Among conventional engine-driven refrigeration systems, an air-conditioning, heating, and hot-water supply system, which has the most complicated system, is configured as shown in FIG. 2, for example.

In FIG. 2, 31 is an engine with a water jacket 32; 33 is a compressor driven by the engine 31;
4 is a four-way valve, 35 is an outdoor heat exchanger, 36 is a pressure reducer, 37
is an indoor heat exchanger, and constitutes a refrigerant circuit A by sequentially connecting a compressor 33, a four-way valve 34, an outdoor heat exchanger 35, a pressure reducer 36, and an indoor heat exchanger 37. Further, 38 is a cooling water pump, 39 is a water heat exchanger, and 40 is a radiator, including a water jacket 32, a cooling water pump 38, a water heat exchanger a9, and a radiator 4.
0 are successively connected to form a cooling water circuit mill. The cooling water is circulated through the water jacket 32, the water heat exchanger 39, and the radiator 4o in this order by the cooling water pump 38. 41m indicates a main circuit, and 41b indicates a bypass circuit that bypasses the radiator 40 and allows cooling water to flow therethrough. A mixing pulp 42 is installed at the confluence of the main circuit 41a and the bypass circuit 41b. The function of the mixing valve 42 is that the water jacket 32
The purpose is to control the amount of cooling water flowing through the main circuit 41a and the bypass circuit 41b so that the temperature of the cooling water entering the main circuit 41a and the bypass circuit 41b is constant. Further, 43 indicates a city water pump, 441'' indicates a hot water storage tank, water heat exchanger 39, city water pump 43, hot water storage tank 44
A hot water supply circuit C is constructed by sequentially connecting these.

The functions of the refrigerant circuit A, the cooling water circuit B, and the hot water supply circuit C will be explained in detail as follows.

In the refrigerant circuit A, the gas refrigerant compressed by the compressor 33 to high temperature and high pressure is cooled by exchanging heat with the outdoor air blown by the outdoor fan 45 in the outdoor heat exchanger 35 during cooling. It becomes a liquid refrigerant.

Thereafter, the pressure is reduced by a pressure reducer 36, and the indoor heat exchanger 37 exchanges heat with indoor air to vaporize and absorb heat, thereby cooling the indoor air and returning to the compressor 33 again. The cycle is repeated 9 times.

During heating, the flow direction of the refrigerant is reversed by switching the four-way valve 34. Thereby, the high-temperature, high-pressure gas refrigerant compressed by the compressor 33 exchanges heat with the indoor air in the indoor heat exchanger 37 and is condensed, thereby heating the indoor air.

In the cooling water circuit mill, the engine exhaust heat is recovered in the water jacket 32 and the high temperature cooling water is first sent to the water heat exchanger 39 by the cooling water pump 38. Here, hot water circuit Cf! : Heats city water by exchanging heat with flowing city water. The cooling water is slightly cooled here, but if the temperature is still higher than the predetermined temperature, it is passed through the main circuit 41m and is further cooled by exchanging heat with the indoor air blown by the outdoor fan 45 at the radiator 40. Ru. Finally, the main circuit 41a and the bypass circuit 41b are connected by the mixing valve 42.
The temperature is controlled to a predetermined temperature by adjusting the flow rate.

In the hot water supply circuit C, the city water in the lower part of the hot water storage tank 44, which has a lower temperature, is transferred to the city water pump 43 and transferred to the water heat exchanger 3.
Send to 9. Here, it is heated to hot water by exchanging heat with high-temperature cooling water, and then returned to the upper part of the hot water storage tank. Hot water is supplied through a hot water supply pipe 47 provided at the top of the hot water storage tank. The shortage of city water due to hot water supply is replenished through a water supply pipe 48 provided at the bottom of the hot water storage tank. The water supply pipe 48 is directly connected to general city water.

Of the engine-driven air-conditioning/heating/water supply system configured as described above, the unit t' including the engine 31, compressor 33, and cooling water pump 38 is divided into a power unit, a four-way valve 44, an outdoor heat exchanger 45, a pressure reducer 46, a radiator 40. outdoor fan 45,
The unit ■' containing the mixing pulp 42 is called the unit m't-hot water supply unit containing the heat exchanger unit, water heat exchanger 39, city water pump 43, and hot water storage tank 44, and these three units and the indoor heat exchanger It is divided into 37 parts. 46a, 46bH are connection pipes that connect the refrigerant circuits of the power unit N' and the heat exchanger unit ■';
6a to 46e are connection pipes that connect the cooling water circuits of the power unit I', the heat exchanger unit 2', and the hot water supply unit Il['.

To configure the engine-driven air conditioning system, among the components shown in FIG. 2, excluding the hot water supply unit
46e may be directly connected.

Further, in order to configure an engine-driven cooling device, it is sufficient to further remove the four-way valve 34 from the heating and cooling device.

The outdoor units of the three engine-driven refrigeration systems mentioned above are constructed by stacking a heat exchanger unit 1' on top of a power unit 1', as shown in FIG. In FIG. 3, the same components as in FIG. 2 are given the same reference numerals.

The power unit 1' has an outer panel 50 of a sealed structure in order to insulate the sound of the engine 31, and the inside is further covered with a sound insulating material 51 such as Pileton. For this reason,
While the device is in operation, the inside of the power unit remains at a high temperature due to heat radiation from the engine, which has an adverse effect on internal components such as accelerating deterioration.

To prevent this, a ventilation fan 52 for ventilation is installed in the power unit. The ventilation route is indicated by arrow D.
As shown by D', a path is taken from the bottom of the power unit, through the ceiling and out to the rear. The reason for taking this route is that high-temperature air accumulates near the ceiling and the air flows from below to above due to rising air currents, so this type of ventilation route is good for efficient ventilation. be.

A first muffler 53 and a second muffler are installed at the bottom and ceiling where the inside of the power unit communicates with the atmosphere, respectively, for sound insulation.
A muffler 54 is provided. The flow paths inside both mufflers are bent by a dividing plate 55.

The heat exchanger unit ■'c has an outdoor fan 45 and an outdoor heat exchanger 35 inside, and is arranged oppositely on the dew pan 55 so that the outdoor heat exchanger 35 is on the windward side of the outdoor fan 45. .

An opening 56 is provided on the windward side of the outdoor heat exchanger 35, an opening 57 is provided on the leeward side of the outdoor fan 45, and the other parts are sealed, as shown by arrows E and E'. Most of the air blown by the outdoor fan 45 passes through the outdoor heat exchanger 35.

Therefore, heat can be sufficiently exchanged between the outdoor heat exchanger 35 and the outdoor air.

It is partitioned by a plate 55.

Problems to be Solved by the Invention However, the conventional outdoor unit of the engine-driven refrigeration system has the following problems.

(1) Since a dedicated ventilation fan is installed, both initial cost and running cost will increase.

(2) If the performance of the silencer is not good, the engine sound inside the power unit will leak. In particular, the second muffler is required to have high performance because the exhaust is directly discharged into the atmosphere from the rear surface, so any leakage of engine sound will be noticeable, which is a factor in increasing costs.

The present invention takes these conventional problems into consideration, and even if the ventilation fan is abolished, the inside of the power unit can be ventilated as before, and the second silencer can be installed without increasing the noise level of the outdoor unit. It is an object of the present invention to provide an outdoor unit for an engine-driven refrigeration system that can be simplified and thereby reduce initial costs and running costs.

Means for Solving the Problem In order to solve this problem, the present invention disposes an outdoor heat exchanger on the windward side of the outdoor fan, facing the power unit which has a built-in engine and has a sealed structure. A heat exchanger unit is placed, and the power unit has a first muffler and a second muffler at the bottom and the top, respectively, and the flow path of the first muffler has one channel connected to the atmosphere and the other channel connected to the power unit. The flow path of the second muffler communicates with the atmosphere on one side in the power unit and on the other side between the outdoor fan and the outdoor heat exchanger in the heat exchanger unit.

Effect The present invention has the above-described configuration, so that even if the ventilation fan is abolished, the inside of the power unit can be ventilated in the same manner as before.
Furthermore, since the second muffler can be simplified without increasing the noise level of the outdoor unit, initial costs and running costs can be reduced.

Example An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, I is a power unit, nrrs, and a heat exchanger unit, and by stacking the heat exchanger unit (2) on top of the power unit I, an outdoor unit is constructed.

The power unit I has an outer panel 2 of a sealed structure to insulate the sound of the built-in engine 1, and the inside is further covered with soundproof material 3.

The heat exchanger unit ■ has an outdoor fan 4 and an outdoor heat exchanger 5 inside, and the outdoor heat exchanger 5 is installed on the windward side of the outdoor fan 4.
They are arranged opposite to each other on the dew pan 6 so that the two sides are facing each other. An opening 7 is provided on the windward side of the outdoor heat exchanger 5, and an opening 8 is provided on the leeward side of the outdoor fan 4, and the air blown by the outdoor fan 4 flows as shown by arrows F and F'.

During operation of the device, the space 9 within the heat exchanger unit is under negative pressure.

Ventilation reservoir openings are provided at the bottom and ceiling of the power unit (2), and a first muffler 10 and a second muffler 11 are respectively provided therein for sound insulation. The internal flow paths of both mufflers are bent by a dividing plate 12. The flow path in the first muffler 10 opens to the atmosphere on one side and into the power unit on the other side. One side of the flow path in the second silencer 11 is the power unit! one is a heat exchanger unit, the other is a heat exchanger unit■
It opens into the inner space 9. Therefore, the ventilation route is arrow G
, as shown by G'.

When the outdoor unit of the engine-driven refrigeration system configured as described above is operated, the outdoor fan 4 is operated and the space 9 inside the heat exchanger unit (I) becomes negative pressure. The air inside the power unit is sucked out, and along with this, air is newly sucked into the power unit I through the first muffler 10, and the inside of the power unit is ventilated. Therefore, a dedicated fan for ventilation becomes unnecessary.

Moreover, the outlet of the second silencer 11 is - heat exchanger unit ■
Because it communicates with the space 9, which is a mostly closed space inside, the internal structure of the second muffler 11 can be simplified by reducing the number of partition plates, etc., even if the leakage of engine sound becomes a little large.
The space 9 plays the role of an auxiliary silencer, and the outdoor fan 4
Since the noise value of the outdoor unit is larger, the noise value of the outdoor unit will not increase.

Therefore, initial costs can be reduced by eliminating the ventilation fan and simplifying the internal structure of the second muffler, and running costs can be reduced by eliminating the ventilation fan.

Effects of the Invention As described above, according to the present invention, a heat exchanger unit in which an outdoor heat exchanger is disposed facing the windward side of an outdoor fan is placed on top of a power unit that has a built-in engine and has a sealed structure. , the power unit has a first muffler and a second muffler on the bottom and the top, respectively, one side of the flow path of the first muffler communicates with the atmosphere, the other side communicates with the inside of the power unit, and the second muffler has The flow path of the chamber communicates with the atmosphere on one side in the power unit and on the other side between the outdoor fan in the heat exchanger unit and the outdoor heat exchanger, thereby eliminating the need for a ventilation fan. The interior of the power unit can be ventilated in the same manner as before, and the second muffler can be simplified without increasing the noise level of the outdoor unit, so initial costs and running costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an outdoor unit of an engine-driven refrigeration system according to an embodiment of the present invention, Fig. 2 is a circuit diagram of a conventional engine-driven air-conditioning, heating, and hot-water supply system, and Fig. 3 is an outdoor unit of the engine-driven refrigeration system. A cross-sectional view is shown. 1...Engine, 4...Outdoor fan,
5... Outdoor heat exchanger, 10... First muffler, 11... Second muffler. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
m-Engine No. 1 Figure 4-11 Chamber Tatov 7
Figure 2 of the engraving of the outdoor house. Figure 3

Claims (1)

[Claims] A heat exchanger unit in which an outdoor heat exchanger is placed facing the windward side of the outdoor fan is placed on top of the power unit, which has a built-in engine and has a sealed structure. a first muffler and a second muffler, one side of the flow path of the first muffler communicates with the atmosphere and the other side communicates with the inside of the power unit, and one side of the flow path of the second muffler communicates with the inside of the power unit. , an outdoor unit of an engine-driven refrigeration system, the other of which communicates with the atmosphere between the outdoor fan and the outdoor heat exchanger in the heat exchanger unit.