JP2000258002A - Connecting header and refrigerator having the header - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively mount a fusible plug as a high pressure gas safety device and to simply decide a mounting position by providing the plug at a high pressure liquid side pipeline of a connecting header. SOLUTION: When three condenser units 1 are combined with a cooling unit through a connecting header 2A, 2b to constitute a refrigerating cycle, a refrigerant from the unit 1 is sent from each high pressure liquid side piping outlet to the cooling unit through a direct tube part of the header 2A. When the plurality of small-sized condenser units 1 are connected to provide a large refrigerating capability facility, the mounting of a necessary safety unit can be effectively executed since a fusible plug is previously provided at an outside position of the unit 1 at a connecting header body of the header 2A when the headers 2A, 2a are used. Thus, since the plug mounting position is disposed at one place of a high pressure liquid side pipeline of the header, a real state of arrangement, an operating state or a fault can be easily confirmed, and the maintenance or replacement of the plug can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting header having a fusible plug as a safety device for a refrigerating apparatus, and a refrigerating apparatus having such a connecting header.

[0002]

2. Description of the Related Art Conventionally, when a plurality of refrigeration units are connected to form a new refrigeration unit having an increased refrigeration capacity, a new refrigeration facility having an increased refrigeration capacity is required. When installing the refrigeration equipment, a maker installed a fusible plug (or fusible plug) or the like as a safety device.

[0003]

However, the mounting position of the fusible plug is set by the installer at an arbitrary position.
The mounting position and the number of mountings are also varied, and it is not easy for a person other than the facility construction worker to check whether or not the fusible plug is mounted and the mounting position.

[0004] The present invention has been made in view of the above points, and as a safety device for high-pressure gas when a construction contractor connects a plurality of refrigerator units and condenser units and installs it as a new refrigeration facility. The installation of the fusible plug of
It is an object to provide a refrigeration apparatus whose mounting position can be easily understood.

[0005]

According to the first aspect of the present invention,
In a connection header for connecting a plurality of condensers in a refrigeration system having a refrigerant compressor, a condenser, an expansion valve, an evaporator, etc., to form a refrigeration system having a different condensing capacity, a high-pressure liquid of the connection header is provided. A fusible plug is provided in the side conduit.

According to a second aspect of the present invention, there is provided a condenser connected to a refrigerant compressor, an expansion valve, an evaporator and the like by a refrigerant pipe to constitute a refrigerating apparatus, and a blower for supplying air to the condenser. A connecting header in which a plurality of condenser units provided are connected to form a refrigerating device having a different condensing capacity, wherein a fusible plug is provided in a high-pressure liquid-side pipe of the connecting header.

According to a third aspect of the present invention, there is provided a refrigerating apparatus including a refrigerant compressor, a plurality of condensers, an expansion valve, an evaporator, and the like. A refrigerating apparatus comprising: a connection header which can be configured; and a connection header in which a fusible plug is provided in a high-pressure liquid-side conduit of the connection header.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a condenser unit (heat exchange device) of an outdoor installation type. A new condenser unit 9 having a large refrigeration capacity is constructed by connecting three condenser units 1 with a refrigerant pipe and a connection header 2, and this condenser unit 9 has a large number of supermarket showcases ( (Not shown) and connected by a refrigerant pipe to form a refrigeration apparatus.

FIG. 2 is an exploded perspective view showing one of the three condenser units constituting the condenser unit shown in FIG. The condenser unit 1 includes a heat exchanger (condenser) 6
And a blower 7 are housed.

In the condenser unit 1, 11 and 12 are left and right side plates of the unit, and 13 is a left side plate 11
In the first electrical box attached to the controller, a control device for controlling the rotation speed of the blower 7 is housed. 14 is a front plate, 15 is a rear plate, and the left and right ends of the front plate 14 and the rear plate 15 are fixed to the left and right side plates 11, 12, respectively.

The blower 7 includes a fan 16 and the fan 16.
And a fan motor 17 for driving the motor. 1
Reference numeral 8 denotes a mounting plate for fixing the motor, and reference numeral 21 denotes a support rod to which the mounting plate is fixed. The support rod 21 is fixed to bent pieces 22 of the front plate 14 and the rear plate 15. Reference numeral 23 denotes an upper plate, a front plate 14, a rear plate 15, a left side plate 11, and a right side plate 12.
Is fixed to the upper edge. Reference numeral 24 denotes a blowout guard attached to the upper plate 23.

Reference numeral 6 denotes a plate-fin type heat exchanger acting as a condenser, which is arranged in a substantially V-shape. These heat exchangers 6 have left and right side plates 11, 12 on the lower side.
The ends of the heat exchangers 6 which are located above and are fixed to the inner surfaces of the left and right side plates 11 and 12. Numeral 25 denotes a cooling air suction guard whose left and right protruding portions 26 are fixed to the edges of the left and right side plates 11 and 12. The heat exchanger 6 is arranged in this manner, and a space is formed on the left, right, lower part and lower part of the heat exchanger 6, and this space is used as a service space such as an air suction space 27 and a piping space 28. 3
Reference numeral 1 denotes a refrigerant pipe extending from the heat exchanger 6 arranged in a V-shape, extending in the direction of the right side plate 12 and thereafter being guided downward.

FIG. 3 is an explanatory view of the condenser unit viewed from the left chamber.

FIG. 4 is a front view showing a state where a part of the condenser unit is cut away.

FIG. 5 shows a compressor unit which is connected in series with the condenser unit 1 connected in parallel and is simply connected to a showcase or the like (not shown) to constitute a refrigerating apparatus. Since the compressor unit 5 is normally installed in a machine room, the left side plate 41, the right side plate 42, the top plate, the front plate, and the back plate (not shown) are not required. However, when the noise is loud, each plate may be provided to prevent the noise from leaking.

Reference numeral 32 denotes a bottom plate on which the refrigerant compressor 3, the oil separator 55, a receiver tank (not shown) and the like are mounted. Reference numeral 48 denotes a partition plate which divides the unit into a compressor 54 and a piping chamber 56. 57 is an electrical box, and 61 and 62 are a high pressure liquid side pipe outlet and a low pressure gas side pipe inlet of the refrigerant pipe, respectively.

FIG. 6 shows the high pressure liquid side piping in the case where three such condenser units are interconnected as shown in FIG. 1 to form a new condenser unit having three times the condensation capacity of the condenser unit. It is a figure which shows a connection header part. Reference numeral 71 denotes a connection header body made of a copper pipe, and both ends thereof are openings 72 and 73 narrowed down to the pipe diameter of the high-pressure liquid-side pipe outlet 61 of the small condenser unit 1. These openings 72, 73 have straight pipes 74, 75, elbows 76, 77, straight pipes 78, 8 respectively.
0 are sequentially connected by welding. The straight pipes 78, 80 are combined with the left and right two pipes 78, 80 and one pipe 79 attached to an opening 81 opened substantially in the center of the connection header main body 71, and are 3 in total.
This is provided with three small condenser units 1
Can be connected to the connection header 2a. Also, the front of the connection header-body 71 is 2
A plurality of openings 84 and 85 are provided, and a concentrated pipe 86 is welded to one of the openings 84. This concentrated pipe 86 serves as a pipe outlet on the high-pressure liquid side of the condenser unit 9 having a large condensation capacity. A fusible plug 87 is attached to the other opening 85 so as to be embedded therein. The operating temperature of the fusible plug 87, that is, the melting temperature, is set to, for example, 73 degrees Celsius and a tolerance of 2 degrees. If the straight pipe of the connecting header 2a configured as described above is increased or decreased, the high-pressure liquid-side pipe outlets 61 of two condenser units or four condenser units can be combined into one high-pressure side pipe. it can.

The low pressure gas connection header 2b is also constructed in the same manner as the high pressure liquid connection header 2a, except that the low pressure gas connection header 2b has no fusible plug 87 and the high pressure liquid connection header 2a. The low-pressure gas connection header 2b is connected to the low-pressure gas side piping inlets 62 of the three small condenser units 1 in the illustrated embodiment, and has a large refrigeration capacity. New condenser unit 9
At the low pressure gas side.

When a refrigeration cycle is constructed by combining the three condenser units 1 with the cooling unit via the connection headers 2a and 2b, the refrigerant discharged from the condenser unit 1 constituting the refrigeration cycle Are connected to the straight pipes 78, 79, 8 of the connection header 2a from the high pressure liquid side pipe outlets 61, respectively.
After passing through the portion 0, the combined header body 71 joins the centralized pipe 86 and is sent to the cooling unit. In the case where a plurality of small condenser units 1 are connected to form a facility having a large refrigeration capacity in this way, if the connection headers 2a and 2b as described above are used, the connection header body 71 of the header 2a is previously provided. Fusible plug 8
7, the safety device necessary for a large refrigeration facility can be installed without fail, and since the mounting position is located outside the condenser unit 1, the fusible plug 87 can be installed. You can easily check the actual situation and abnormalities.

As described above, the present invention has been described based on one embodiment, but the present invention is not limited to this. In the present embodiment, the connection header 2a at the outlet of the high-pressure liquid pipe of the plurality of condenser units 1 has been described. As long as the fusible plug 87 is provided in the part of the large-capacity high-pressure liquid side pipe outlet, its shape may be any.

Also, the embodiment in which a plurality of small condenser units are connected to form a refrigeration facility having a large refrigeration capacity has been described. However, the present invention is not limited to the condenser unit, but a refrigerant compressor, a condenser, an evaporator, an expansion valve, and the like. A fusible plug may be provided in a header which connects a plurality of refrigerator units constituted by the above to form a new refrigerator unit having a large refrigeration capacity.

[0023]

According to the present invention, even if the number of connected condenser units or refrigerator units is two or three or more,
Since a fusible plug is provided in the connection header where the high-pressure liquid-side refrigerant of each unit is concentrated, even if an abnormally high pressure occurs in any of the units, safety can be achieved at one place.

In the case where a fusible plug is separately provided in a refrigerator unit, two types, a model with a fusible plug and a model without a fusible plug, can be used, which increases management cost and production cost. As in the present invention, the fusible plug is provided in the high-pressure liquid-side conduit of the connection header, so that a general-purpose safety device that can be used in any condenser unit or refrigerator unit can be provided. Become.

Furthermore, when checking the fusible plug or when the fusible plug is activated, the operable state of the fusible plug is easily determined because the mounting position of the fusible plug is one of the high-pressure liquid-side pipes of the connection header. Understandably, maintenance and replacement of the fusible plug can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where three condenser units are connected and configured.

FIG. 2 is an exploded perspective view showing a configuration of a device of the condenser unit.

FIG. 3 is an explanatory diagram viewed from a left side chamber of the condenser unit.

FIG. 4 is a front view showing a state where a part of the condenser unit is cut away.

FIG. 5 is a front view of the compressor unit.

FIG. 6 is a plan view of the connection header of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Condenser unit 2 Connection header 2a High pressure liquid side connection header 2b Low pressure gas side connection header 3 Refrigerant compressor 6 Heat exchanger 9 Connected condenser unit 61 High pressure liquid side piping outlet 87 Meltable plug

Claims (3)

[Claims] 1. A connecting header for connecting a plurality of condensers in a refrigerating apparatus having a refrigerant compressor, a condenser, an expansion valve, an evaporator, etc., to thereby form a refrigerating apparatus having a different condensing capacity. A connection header characterized in that a fusible plug is provided in a high-pressure liquid-side pipe of the ladder. 2. A condenser unit comprising a condenser connected to a refrigerant compressor, an expansion valve, an evaporator and the like via a refrigerant pipe to constitute a refrigerating apparatus, and a blower for supplying air to the condenser. A connection header in which a plurality of connection units can be configured to form a refrigerating device having a different condensing capacity, wherein a fusible plug is provided in a high-pressure liquid-side pipe of the connection header. 3. A refrigeration system including a refrigerant compressor, a plurality of condensers, an expansion valve, an evaporator, and the like, wherein the plurality of condensers are connected to form a refrigeration device having a different condensing capacity. A refrigeration apparatus having a connection header, wherein a fusible plug is provided in a high-pressure liquid-side conduit of the connection header.