JPH0124982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-cooled refrigeration system, and particularly to a refrigeration system that has high adiabatic efficiency and is easy to assemble.

For example, in a water-cooled refrigeration system as a conventionally commonly used refrigeration system, a compressor, a cooler as a usage side evaporator, a non-use side condenser,
It consists of a throttling device and a control panel that controls its operation, and in water-cooled refrigeration equipment, it is used to cope with wide-ranging condition fluctuations in the condensing temperature (condensing pressure) on the non-user side and the evaporating temperature (evaporating pressure) on the user side. ,
In addition, a liquid receiver (so-called accumulator) is installed to prevent liquid from returning to the compressor (so-called liquid back operation) due to frequent operation and stoppage of the refrigeration equipment.
However, there were problems with installation space and assembly work, leading to higher costs.

The purpose of this invention is to eliminate the above-mentioned drawbacks by installing a liquid receiver in the heat exchange part of the user-side evaporator and integrally molding the liquid receiver with the user-side evaporator using foamed resin to fix the receiver. This is where we have improved.

Hereinafter, the refrigeration system according to the present invention will be explained in detail using the drawings.

1 and 2 are exploded perspective views showing one embodiment of a refrigeration system according to the present invention. In the same figure, 1
is a refrigeration system, and is composed of a machine room section 2 and a heat exchange section 3. In the figure, reference numeral 4 designates an underframe made by bending a comparatively thin steel plate toward its periphery so that its cross-sectional shape is square-shaped in the front, back, left, and right directions, and which also serves as a drain tray. Reference numeral 4a indicates a positioning projection on the front panel, which will be described later. Reference numeral 4b indicates a through hole provided on both left and right side surfaces for fixing a non-use side condenser 6, which will be described later. Reference numeral 5 indicates a compressor 13 and a compressor support plate 11, which will be described later. This is a U-shaped mesh frame for installing the underframe 4, and is planted in parallel across the front and back of the upper surface of the underframe 4.

Reference numeral 4c denotes screw holes provided at the left and right front end portions for vertically fixing the support column 9 to the underframe 4, which will be described later. 6 shows the configuration of the non-use side condenser, and 7 shows the heat exchange part of the non-use side condenser that exchanges heat between the refrigerant incorporated in the lower part and the circulating cooling water. It is constructed of a double pipe type including an outer pipe 7a through which water flows and an inner pipe 7b through which water flows. Reference numeral 7c is a water pipe that communicates with the water circuit of the non-use side condenser 6, and two water pipes 7c, upper and lower, are provided on the left and right sides.

Reference numeral 8 denotes a through hole for mounting a support column 9, which will be described later, on the upper part of the non-use side condenser 6, and 9 is a hole 2 formed by bending a relatively thick steel plate into an L-shape.
It is a book support, and the lower end of each support 9 has an underframe 4.
It has a bolt hole 9a corresponding to the screw hole 4c at the end. Therefore, the lower end of each support 9 is connected to the underframe 4.
When the bolts 4e are inserted into the screw holes 4c and the bolt holes 9a and tightened, the lower ends of each column abut against the ends of the underframe 4 and are assembled together.

9b is a through hole for fixing a connecting plate 10, which will be described later;
c is a through hole for fixing a control device to be described later.

The connecting plate 10 is fixed with screws through the through hole 9b of the pillar located on the front side and the through hole 8 provided on both sides of the unused side condenser 6 attached to the back side. A relief notch 10 for the piping connection port of the unused side condenser 6 is provided on the side surface of 10.
At the rear of the upper part a, an L-shaped cut-and-raised part 10b and a through hole 10c are provided so that a user-side evaporator, which will be described later, is positioned and fixed with a screw.

Further, a through hole 10c for fixing a user side evaporator, which will be described later, is provided at the center of the upper part.

Reference numeral 11 denotes a compressor support plate made of a relatively thick steel plate that is attached to the frame 5 on the underframe 4.
It is positioned and fixed by a screw hole provided in the. Further, a compressor 13, which will be described later, is attached to the upper part of the compressor support plate 11.

The compressor 13 is attached to the upper part of the compressor support plate 11 via anti-vibration rubber (not shown),
The structure is such that vibrations caused by the operation of the compressor 13 are not propagated to the underframe 4.

This forms the framework of the machine room section 2.

Reference numeral 12 shows the configuration of the use-side evaporator installed on the connecting plate 10 formed by screwing the struts 9 and the non-use-side condenser 6, and 12a indicates the inner pipe 12a through which the refrigerant flows and the inner pipe. It consists of an outer tube 12b through which water flows around the outer periphery of the tube 12a, and is wound into a coil to form a multi-tube structure. Reference numeral 12c is a water pipe that communicates with the water circuit of the user-side evaporator 12, and two pipes are provided on the left and right, upper and lower.

Reference numeral 12g is a liquid receiver that stores the moist refrigerant after evaporating inside the inner pipe 12a, and as can be seen in detail in FIGS. The gas refrigerant only passes through the U-shaped pipe 12j and is connected to the compressor 13 pipe. This liquid receiver 12g
is installed on the upper part of the lower water pipe 12c of the user side evaporator 12, and is housed in the multi-tubular outer pipe 12b and inner pipe 12a above the coil. Therefore, the refrigerant piping between the user side evaporator 12 and the liquid receiver 12g is connected at this point, and the refrigerant piping length can be connected to the minimum length in which resistance loss on the low pressure side is suppressed as much as possible.

In addition, on the back side of the U-shaped steel plate (not shown),
Screw holes are made at positions corresponding to the through holes provided in the L-shaped cut and raised portion 10b of the connecting plate 10.

The rectangular parallelepiped part surrounded by the U-shaped steel plate is completely insulated with foamed material such as urethane foam resin, and the receiver 12g is fixed and the user side evaporator 1
Prevents heat radiation loss from 2 and water droplets from falling due to condensation.

12d is an L-shaped reinforcing plate provided in the front part of the user side evaporator 12, with through holes 1 bored at both ends.
The user-side evaporator 12 is fixed to the connecting plate 10 through 2e.

Further, a through hole 12f for fixing a control device, which will be described later, is also formed in the center.

Reference numeral 14 denotes a control panel in which various control parts for controlling the operation of the refrigeration equipment, as well as switches and indicator lights for operation are housed. Control parts are provided in each concave part of the control box 14a, and convex parts are provided in each concave part of the control box 14a. A switch and an indicator light are attached to the section 14b.

Reference numeral 15 is a side plate installed on the upper part of the underframe 4 and fixed with screws together with a through hole drilled in the support column 9. Reference numeral 16 is a rear plate of a relatively thin steel plate, and a plurality of pieces are provided at both ends of the side plate. Side plates 15 are provided with through holes 16a and are attached to both ends of the underframe 4.
A rear plate 16 is fixed to the rear plate 16 by screws. 17
is a top plate made of a relatively thin steel plate attached to the top of the main body, the periphery is bent in an L shape and hangs down, and it is covered from the top with side plates 15 and rear plate 16 in between. , through holes 17 drilled on the left and right
It is fixed with a screw through a. Reference numeral 18 denotes a front panel formed by bending the periphery of a relatively thin steel plate into an L-shape, and a top plate 17 is attached to the upper part of the front panel.
A hole 18a for a screw to be fixed through a through hole 17b is provided in the lower part, and a positioning protrusion 4a provided in the front part of the underframe 4 is provided in the lower part.
A through hole 18b is formed so as to be fixed in position by being pushed into the hole 18b.

The refrigeration system configured as described above is assembled as follows. First, compressor support plates 11 are provided on the frame 5 on the left and right sides of the upper front part of the underframe 4, respectively, and the compressor 13 is fixed to the upper part of the frame 5 via anti-vibration rubber (not shown). . An unused side condenser 6 is installed at the rear of the upper part of the underframe 4, and connects the side through hole 4b of the underframe 4 to the side plate 1.
5 is fastened and fixed to the screw hole at the bottom with a bolt.

Next, struts 9 are vertically attached to both front ends of the underframe 4 and fastened and fixed with screws through the bolt holes 9a of the struts 9 and the screw holes 4c of the underframe 4.

Next, the connecting plate 10 is screwed through the through hole 8 made in the support column 9 attached to the front part, the unused side condenser 6 attached to the rear part, and the through hole made in the connecting plate 10. The connecting plate 10 is integrally attached, and the utilization side evaporator 12 is attached to the upper part of the connecting plate 10.

In this state, the piping (not shown) of the refrigerant circuit composed of the compressor and the heat exchange section is connected.

Next, a control device 1 is installed in the front part of the user side evaporator 12.
4 is attached, and the through hole provided in the convex portion 14b and the through hole 9c provided in the support column 9 are fastened and fixed with screws.

Next, the side plates 15 are attached to the underframe 4, and after the rear plate 16 and top plate 17 are fixed, the upper front panel 18 is
is attached to the top plate 17 through the through hole 17a, and is attached to the positioning projection 4a of the underframe 4 through the through hole 18b of the lower front panel 18.

Next, the control operation of the refrigeration system will be explained. In FIG. 3, the high-temperature, high-pressure gas refrigerant discharged from the compressor 13 enters the refrigerant pipe of the non-use side condenser 6, and the inner pipe of the double-pipe heat exchanger 7 is filled with cooling water, and the outer pipe As the refrigerant passes through the refrigerant, it becomes a high-pressure liquid refrigerant after exchanging heat with the cooling water, and further, by passing through the expansion device 19, it becomes a low-pressure liquid/gas mixed refrigerant and is sent to the user side evaporator 12. The cold water passes through the outer tube of the multiplex heat exchanger, and the refrigerant passes through the inner tube, and after exchanging heat with the cold water, it returns to the liquid receiver 12g, and the liquid part of the wet refrigerant accumulates at the bottom, and the gas part is U
It passes through the letter-shaped pipe 12j and returns to the compressor 13 as a gas refrigerant.

Even if a sudden change in load or frequent operation/stopping of the compressor occurs, the liquid will simply accumulate in the liquid receiver 12g, and liquid backing up to the compressor 13 can be prevented. In this way, a refrigeration cycle is constructed, and this operation is repeated thereafter.

Although noise is generated from the compressor 13, a front panel 18 is provided at the front part, and side plates 15 are provided at both sides. Furthermore, since a fully insulated usage side evaporator 12 is provided above the unused side condenser 6 at the rear, the sound insulation effect is increased and noise can be reduced.

As explained above, in the refrigeration system according to the present invention, after installing the compressor in the front of the upper part of the underframe and the non-use side condenser at the rear, a connecting plate is attached between the support and the non-use side condenser. The user-side evaporator, which is completely insulated with foamed resin and houses the liquid receiver inside, is placed above the user-side condenser and connecting plate, and is surrounded by the front panel, side plates, top plate, and rear plate. It is composed of Therefore, assembly becomes easy, and the sound insulation effect is enhanced, resulting in low noise. Also,
Since the heat exchange part is completely insulated, it is possible to prevent heat radiation loss and dew condensation from the user-side heat exchanger. In addition, since a liquid receiver is incorporated, it is possible to prevent liquid back-up operation due to frequent operation and stop of the compressor when the load suddenly changes, and this has a very large practical effect.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the refrigeration system according to the present invention, Fig. 2 is a perspective view of various parts of the refrigeration system shown in Fig. 1, and Fig. 3 is an enlarged explanation of the main parts of the liquid receiver of the invention. 4 is a refrigerant system diagram of the refrigeration cycle. 3... Heat exchange section, 4... Underframe, 9... Support column, 6
... Condenser, 12 ... Cooler, 12g ... Liquid receiver, 14 ... Control panel, 15 ... Side plate, 16 ... Rear plate, 17 ... Top plate, 18 ... Front panel. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A compressor provided at the front of the upper part of the underframe, a condenser on the non-use side provided behind the compressor, left and right frames supported and fixed by the above-mentioned underframe and the condenser on the non-use side, and the above-mentioned A user side evaporator installed on the frame and above the non-user side condenser, a low pressure side liquid receiver installed in the heat exchange section of the user side evaporator, and a low pressure side receiver placed in front of the user side evaporator. The evaporator on the user side and the receiver on the low pressure side are integrally insulated with foam, and further includes a top plate, a side plate, a rear plate, and a front plate that cover the periphery thereof. refrigeration equipment.