JP2001280760A - Refrigerator unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an installing space of a refrigerator unit. SOLUTION: A digital pressure switch 60 is operated as both a low-pressure switch and a low-pressure pressure gage. The switch 60 is mounted adjacent to a high-pressure pressure switch 53 at an upper part of a liquid receiver 15 via a mounting plate 61. A high-pressure pressure gage 62 is connected from an oil separator 13 to a stop valve 32 for a service via a capillary tube 63, and mounted adjacent to the switch 52 at an upper position of the switch 60 via the plate 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator unit, and more specifically, a compressor and a liquid receiver are fixed on a unit base, and are connected to an external evaporator, an external condenser, etc. by piping. A refrigeration unit constituting a refrigeration cycle.

[0002]

2. Description of the Related Art As shown in FIGS. 6, 7 and 8, a compressor 2 constituting a refrigeration cycle is provided at a front side of a unit base 1, and the refrigeration unit is located beside the unit base 1. An electrical box 3 containing a control device for controlling the unit is placed and fixed. A vertical oil separator 4 is provided behind the compressor 2, and a liquid receiver 5 is provided behind the electrical box 3.
Is provided.

A pressure gauge 6 and a pressure switch 7 for detecting abnormal pressure and protecting the compressor 2 are fixed to the left side of the electrical box 3, and are disposed so as to be easily seen from the front.

[0004]

However, the pressure gauge 6
Since the pressure switch 7 and the pressure switch 7 are provided on the side surface of the electrical component box 3, the width of the unit base 1 is required by that much, and the installation space is not reduced. Therefore, an object of the present invention is to reduce the installation space of a refrigerator unit.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a refrigeration system having a refrigeration cycle in which a compressor and a liquid receiver are fixed on a unit base and connected to a pipe with an external evaporator, an external condenser, and the like. A pressure switch and a pressure gauge for detecting abnormal pressure and protecting the compressor in the liquid receiver.

Further, according to the present invention, a compressor is fixed to a front side of a unit base, and a vertical liquid receiver is fixed to a rear side, and a refrigeration cycle is constituted by piping connected to an external evaporator, an external condenser, and the like. A pressure switch and a pressure gauge for detecting abnormal pressure and protecting the compressor are attached to the upper part of the vertical liquid receiver.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a refrigerator unit of the present invention, FIG. 2 is a plan view of the refrigerator unit of the present invention, FIG. 3 is a refrigerant circuit diagram of the refrigerator unit of the present invention, and FIG. FIG. 5 is a front view of the liquid injection function element, and FIG. 5 is a plan view of the liquid injection function element.

First, in FIGS. 1 and 2, two compressors 11 and 12 for sucking and compressing a refrigerant to generate a high temperature and a high pressure are mounted on a unit base 10 having a flat mounting surface in consideration of maintenance. They are arranged side by side at the front position. An oil separator 13 and a gas-liquid separator 14, which will be described later, are disposed behind the compressor 11, and a vertical liquid receiver 15 on the unit base 10 is provided behind the compressor 12. Is fixed.

At the left end of the unit base 10 on the rear side of the compressor 11, a first support plate 16 is erected, and substantially at the center of the unit base 10 in the left-right direction and at the rear end. Is provided with a second support plate 17 having a U-shape in plan view. Then, an electrical box 19 containing a control device for controlling the refrigerator unit is placed and fixed on a flat horizontal placing plate 18 supported by the two support plates, 16, 17 and the liquid receiver 15. I do. That is, a support piece bent inward is formed at the front part of the upper end of the first support plate 16, and the left end of the horizontal mounting plate 18 is fixed to the support piece, and the second support plate 16 is fixed. 17, the right rear end of the horizontal mounting plate 18 is fixed to the upper end of the front bent portion, and the right end of the horizontal mounting plate 18 is
5, the horizontal mounting plate 17 is supported by the two support plates 16, 17 and the receiver 15, and the electric box 19 is mounted on the horizontal mounting plate 18. Is placed.

The oil separator 13 is attached to the unit base 10 via a fixture 20 behind the horizontal mounting plate 18 when viewed from above.
The gas-liquid separator 1 is fixed to the second support plate 17 via a fixture 21 behind the horizontal mounting plate 18.
4 is fixed in a floating state without touching the unit base 10. The support plate 17 also supports the horizontal mounting plate 18, but mainly supports the gas-liquid separator 14. Also,
The dry core 23 is fixed to the second support plate 17 via a fixture 22 in a state of being floated without contacting the unit base 10. The oil separator 13 includes the compressor 1
It separates oil contained in the high-temperature and high-pressure refrigerant gas discharged from the first and second refrigerants.

The liquid receiver 15 stores the refrigerant liquefied by the extra-condenser condenser, and is fixed on the unit base 10 behind the compressor 12 and to the right of the electrical box 19. You.

Hereinafter, description will be made mainly with reference to FIG. The compressors 11 and 12 are connected in parallel to the gas-liquid separator 14 via service valves 30 and 31, respectively, and the oil separator 13 connected to a high-pressure gas outlet pipe 34 has a service stop valve 32 respectively. , 33 via the compressors 11, 12
Are connected in parallel. The oil separator 13 separates oil from the refrigerant, and also serves as an oil tank for storing the separated oil. The oil is used as a service stop valve 35, a strainer 36, solenoid valves 37 and 38, and a capillary tube 39. , 40 to the compressors 11, 12.

An air-cooled or water-cooled external condenser 41 connected to the high-pressure gas outlet pipe 34 by welding condenses and liquefies the high-temperature and high-pressure refrigerant from the compressors 11 and 12. It is installed outside the refrigerator unit, and the other end is welded and connected to the high-pressure liquid inlet 43, and further connected to the liquid receiver 15 via a service stop valve 42. The receiver 1
5 is connected to a high-pressure liquid outlet 48 via a service valve 44, a dry core 23, and a moisture indicator 45. Reference numeral 49 denotes a fusible stopper for preventing the liquid receiver 15 from exploding due to a high temperature in a fire or the like.

A low-pressure gas inlet 50 connected to an external evaporator (not shown) is connected to the gas-liquid separator 14 via a strainer 51. Further, each of the compressors 11,
A high-pressure switch 52 for detecting the abnormal high pressure and protecting the compressors 11 and 12
53 is connected via capillary tubes 54 and 55 for pressure stabilization. As shown in FIG. 1, the high pressure switches 52 and 53 are connected to the liquid receiver 1 via a mounting bracket 56.
5 are attached to the top and bottom respectively.

Service stop valves 57 and 58 are provided between the compressors 11 and 12, and the service stop valves 57 and 58 are provided.
A digital low pressure switch 60 for controlling the capacity of the compressors 11 and 12 is connected to an intermediate position between the compressors 58 and 58. The digital low pressure switch 60 serves as both a low pressure switch and a low pressure manometer, and is mounted on the upper part of the receiver 15 via the mounting plate 61 adjacent to the high pressure switch 53. Reference numeral 62 denotes a high-pressure manometer, which is connected between the oil separator 13 and the service stop valve 32 via a capillary tube 63, and is located at a position above the digital low-pressure switch 60 via the mounting plate 61. It is mounted adjacent to the pressure switch 52.

It should be noted that even if soundproof exterior panels are mounted above the compressors 11 and 12 (at the same height as the horizontal mounting plate 18), in front and on both sides, The height of the back is higher than the horizontal mounting plate 18, and devices such as the high-pressure switches 52 and 53, the digital low-pressure switch 60, and the high-pressure gauge 62 are mounted on the horizontal mounting plate above the liquid receiver 15. By providing the device at a position higher than the plate 18, the device can be viewed.

In the receiver 15, the high-pressure liquid refrigerant is evaporated and the service valves 64, 4 are supplied to the compressors 11, 12.
6. By returning through the strainers 65 and 47, the solenoid valves 68 and 69, and the capillary tubes 72 and 73, the liquid injection pipe 66 for cooling the compressors 11 and 12 with the heat of vaporization and controlling the compressor capacity is provided. It is connected. Reference numerals 70 and 71 denote thermo valves (injection control valves), which are solenoid valves 68 and 69 and the compressor 11,
12 are connected in parallel with the capillary tubes 72 and 73. Thermo-valves 70 and 71 are provided with temperature-sensitive cylinders 74 and 75 attached to the discharge-side pipes of the compressors 11 and 12, respectively.
The control is performed such that the flow rate of the liquid refrigerant into each of the compressors 11 and 12 is increased when the discharge gas refrigerant temperature of each of the compressors 11 and 12 becomes high, and is decreased when the temperature is lowered. is there. The service valve 64 is normally open, and is closed only at the time of replacement due to failure of the compressors 11 and 12, the solenoid valves 68 and 69, and the thermo valves 70 and 71, and only at the time of maintenance.

Reference numeral 76 designates a U-shaped mounting plate for mounting the temperature protection liquid injection function element of the compressor 11, and a horizontally bent mounting portion 77 at the lower end is provided with both of the compressors 11, 12. It is fixed to the front part of the unit base 10 by screws. The service valve 64 is screwed to the vertical plate A78 while being inserted into the notch 79 of the vertical plate A78 of the mounting plate 76, and the strainer 65 moves the fixture 80 surrounding the strainer 65 to the vertical plate A.
The electromagnetic valve 68 is fixed to the right end of the vertical plate B81 by screwing it to the left end of the vertical plate B81, and the thermovalve 70 is fixed to a fixing member 82 surrounding the valve by the vertical plate A78. It is fixed by screwing it to the left end.

The temperature protection liquid injection function element of the compressor 12 is also mounted on a mounting plate (not shown) disposed on the right side of the compressor 12. That is, the service valve 46 is screwed to the vertical plate A (not shown) while being inserted into the notch (not shown) of the vertical plate A (not shown) of the mounting plate (not shown) as described above, and the strainer 47 is a fixture surrounding the strainer 47 (not shown)
Is fixed to the right end of the vertical plate A by screwing, and the solenoid valve 69 is attached to the vertical plate B of the mounting plate (not shown).
The thermo valve 71 is fixed to the left end of the vertical plate A (not shown) by screwing it to the left end of the vertical plate A (not shown). Fixed by

The refrigerating machine unit of the present embodiment configured as described above is connected by welding to a refrigerant pipe of a condenser outside the body or an evaporator outside the body. Now, the high-temperature and high-pressure gas refrigerant compressed by the compressors 11 and 12 is supplied to the condenser 41 outside the machine body via the service stop valve 32 and the oil separator 13,
Here, it is condensed and liquefied and stored in the liquid receiver 15 via the service stop valve 42.

From the liquid receiver 15, the high-pressure liquid refrigerant is decompressed and expanded by passing through an expansion valve connected to the refrigerator unit via a service valve 44, a dry core 23 and a moisture indicator 45, thereby evaporating outside the body. The refrigerator unit is supplied to the chiller, is evaporated, and exerts a cooling capacity by the endothermic action. Then, the low-pressure refrigerant gas enters the gas-liquid separator 14 of the refrigerator unit via the strainer 51, and after the gas-liquid separation, only the gas component returns to the compressors 11 and 12 via the service valves 30 and 31. And recompressed, and repeat the refrigeration cycle described above.

As described above, since the high-temperature gas refrigerant is discharged from the compressors 11 and 12, each compressor 11, 12
The temperature of the discharge-side pipe No. 12 rises sharply.
At the same time as the compressors 11 and 12 are started, the control device in the electrical box 19 opens the solenoid valves 68 and 69. Then, a part of the liquid refrigerant flows from the liquid receiver 15 into the liquid injection pipe 66 and is divided. When the temperature of the discharge side pipe rises, the thermo valves 70, 71
Increases the valve opening and supplies the liquid refrigerant to the compressors 11 and 12 to lower the temperature of the gas refrigerant discharged from the compressors 11 and 12.

[0023]

As described above, according to the present invention, the installation space of the refrigerator unit can be reduced. Further, since a pressure switch and a pressure gauge for detecting the abnormal pressure and protecting the compressor are attached to the upper part of the vertical liquid receiver, even when a soundproof exterior panel is attached in front of the compressor, The pressure switch and pressure gauge can be viewed.

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator unit.

FIG. 2 is a plan view of the refrigerator unit.

FIG. 3 is a refrigerant circuit diagram of the refrigerator unit.

FIG. 4 is a front view of a liquid injection functional element for temperature protection of a compressor of the refrigerator unit.

FIG. 5 is a plan view of a temperature protection liquid injection function element of the compressor of the refrigerator unit.

FIG. 6 is a front view of a conventional refrigerator unit.

FIG. 7 is a plan view of a conventional refrigerator unit.

FIG. 8 is a right side view of a conventional refrigerator unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Unit base 11, 12 Compressor 15 Liquid receiver 52, 53 High pressure switch 60 Digital pressure switch 62 High pressure gauge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Yamamoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term (reference) in Sanyo Electric Co., Ltd. 3L054 BB01 BB02

Claims (2)

[Claims] 1. A refrigerating machine unit comprising a compressor and a liquid receiver fixed on a unit base, and connected to a pipe with an extra-evaporator, an extra-body condenser, and the like to form a refrigerating cycle, wherein the liquid receiver is provided. A refrigerating machine unit provided with a pressure switch and a pressure gauge for detecting abnormal pressure and protecting the compressor. 2. A refrigerator having a compressor fixed to the front side on the unit base and a vertical liquid receiver fixed to the rear side, and connected to the external evaporator, the external body condenser and the like by piping to constitute a refrigerating cycle. A refrigerator unit, wherein a pressure switch and a pressure gauge for detecting abnormal pressure and protecting the compressor are attached to an upper portion of the vertical liquid receiver.