JPH03213977A - Condensing unit - Google Patents

Abstract

PURPOSE:To prevent low temperature refrigerant gas returned from a condenser from making contact with air which has been heat exchanged at a condenser and heated during said low temperature refrigerant gas passing through a low pressure side refrigerant pipe, and further prevent the amount of refrigerant circulation from being reduce and freezer oil from being deteriorated by providing a windshield between the low pressure side refrigerant pipe of a condensing unit and a fan motor. CONSTITUTION:Once a condensing unit is operated, cold air refrigerant gas returned from a condenser enters a compressor 2 after passing through a low pressure side service valve 9 and further a low pressure side pipe 11 and is supplied to a fin condenser 3 as high temperature high pressure gas. On the other hand, a fan 6 is rotated by the actuation of a fan motor 5 to suck air which air is then heat-exchanged with the high temperature high pressure refrigerant gas through the fin condenser 3 and thereafter the air is allowed to flow in the direction indicated by an arrow. Thereupon, the air collides with the windshield 12, and is changed in the direction of its flow and hence is prevented from making contact with the low pressure side refrigerant pipe 11. Thus, temperature of the low temperature refrigerant gas sucked into the compressor 2 is prevented from being raised and the amount of refrigerant circulation is not reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air-cooled condensing unit for cooling refrigerators, freezers, and the like.

BACKGROUND OF THE INVENTION In recent years, there has been a strong demand for smaller condensing units in the market. A conventional condensing unit generally has a configuration shown in a catalog of Matsushita Electric Industrial Co., Ltd. published in April 1989. A conventional condensing unit will be described below with reference to the drawings. Figure 3 is a perspective view of a conventional condensing unit.
FIG. 4 shows a plan view of FIG. 3. In FIGS. 3 and 4, 1 is a unit base, 2 is a compressor, and 3 is a fin condenser, which is composed of a pipe 3a and fins 3b. 4 is a fan duct, a part of which is based on the upper surface of the fin capacitor 3. 5 is a fan motor, 6 is a fan, and 7 is a receiver tank. 8 and 9 are high pressure side service valves.

It is connected to a cooler (not shown) through a low-pressure side service valve. 10a and 1ob are high pressure side refrigerant pipes, and 11 is a low pressure side refrigerant pipe.

The operation of the condensing unit configured as described above will be explained below. When the condensing unit is operated, the compressor 2 compresses the low-temperature refrigerant gas to become a high-temperature, high-pressure refrigerant gas, which is supplied to the fin condenser 3 through the high-pressure side refrigerant pipe 10b. The high temperature and high pressure refrigerant gas is passed through the pipe 3 of the fin condenser 3.
a Inside t' flows. Meanwhile, due to Juan Mortaro's actions,
The fan 6 rotates and air flows in the direction of the arrow. When air passes through the fin condenser 3, heat exchange occurs between the refrigerant flowing through the pipe 3a and the air, and the high-temperature and high-pressure refrigerant is cooled and condensed and liquefied to become a low-temperature and high-pressure refrigerant liquid.The high-pressure side refrigerant pipe 10a After passing through υ and being stored in the receiver tank 7,
It is sent to a cooler (not shown) via the high pressure side service valve 8.

The low-temperature refrigerant returned from the cooler passes through the low-pressure side service valve 9, the low-pressure side refrigerant pipe 11, and returns to the compressor 2. The cycle repeats as above. The condensing unit is the cooling system described above that only provides a condensing state of the refrigerant. Usually, a condensing unit and a cooler are combined to form a cooling system, which is used to cool refrigerators, freezers, and the like.

Problems to be Solved by the Invention However, in the above configuration, the low-temperature refrigerant gas returned from the cooler is heat-exchanged by the fin condenser 3 while passing through the low-pressure side refrigerant pipe 11, and becomes high-temperature air ( As the temperature rises by 3 to 4 degrees Celsius and returns to the compressor 2, the specific volume of the refrigerant increases, leading to a decrease in the amount of refrigerant circulated (decreased refrigeration capacity) discharged by the compressor 2. However, there was a problem in that the discharge temperature of the compressor 2 increased and the refrigerating machine oil deteriorated.

In view of the above-mentioned problems, the present invention provides a condensing unit that prevents a decrease in the amount of refrigerant circulation discharged by a compressor (reduction in refrigeration capacity) and deterioration of refrigerating machine oil.

Means for Solving the Problems In order to solve the above problems, a condensing unit of the present invention includes a compressor, a fin condenser, a fan duct, a fan motor, a fan, a receiver tank, a high pressure side service valve, and a low pressure side service valve. It consists of a high-pressure side refrigerant pipe, a low-pressure side refrigerant pipe, and a unit base on which these are placed, and a windshield is provided between the low-pressure side refrigerant pipe and the fan motor.

Operation The present invention has the above-described configuration, while the low-temperature refrigerant gas returned from the cooler passes through the low-pressure side refrigerant pipe.

Air that has been heat exchanged by the fin condenser and has become high temperature (
Since the refrigerant does not come into contact with the refrigerant (forced by the fan) and the temperature of the refrigerant does not rise, it is possible to prevent a decrease in the amount of refrigerant circulation (reduction in refrigerating capacity) and deterioration of the refrigerating machine oil.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the condensing unit of the embodiment, and FIG. 2 is a perspective view of FIG. 1.

In FIGS. 1 and 2, components that are the same as those of the prior art are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In FIGS. 1 and 2, 12 is a windshield according to an embodiment of the present invention.

In FIGS. 1 and 2, a compressor 2, a fin capacitor 3, a fan duct 4, a fan motor 6, and a fan 6 are shown.
A low pressure Side refrigerant pipe 1
A windshield 12 is provided between the fan motor 1 and the fan motor 5.

The effect will be explained below. When the condensing unit is operated, the low-temperature refrigerant gas returned from the cooler (not shown) passes through the low-pressure side service valve 9.
The refrigerant enters the compressor 2 through the low-pressure side refrigerant pipe 11, becomes high-temperature and high-pressure gas, and is supplied to the fin condenser 3. On the other hand, the fan 6 rotates due to the operation of the fan motor 5, sucking in air, and after exchanging heat with the high temperature and high pressure refrigerant gas via the fin condenser 3, the air flows in the direction of the arrow. At this time, the air collides with the windshield 12, changes the flow direction, and does not come into contact with the low-pressure side refrigerant pipe 11.

If there is no windshield, the low-pressure side refrigerant pipe 11 through which low-temperature refrigerant gas passes is connected to the high-temperature air pumped by the fan 6.
The temperature increase was ~4°C, but by providing a windshield, this temperature increase can be prevented.

As a result of these actions, the temperature of the low-temperature refrigerant gas sucked into the compressor 2 does not rise, making it possible to prevent a decrease in the amount of refrigerant circulation (reduction in refrigeration capacity) and deterioration of the refrigerating machine oil.

Effects of the Invention As described above, the present invention provides a compressor, a fin capacitor, a fan duct, a fan motor, a fan, and a receiver.
A windshield is installed between the low-pressure refrigerant pipe and the fan motor of the condensing unit, which consists of a tank, a high-pressure side service valve, a low-pressure side service valve, a high-pressure side refrigerant pipe, a low-pressure side refrigerant pipe, and a unit base on which these are mounted. Particularly, while the low-temperature refrigerant gas returning from the cooler passes through the low-pressure side refrigerant pipe, it no longer comes into contact with the high-temperature air (forced by the fan) that undergoes heat exchange with the condenser, so the temperature does not rise. It is possible to prevent a decrease in the amount of refrigerant circulation (reduction in refrigeration capacity) and deterioration of refrigerating machine oil.

[Brief explanation of drawings]

Fig. 1 is a plan view of a condensing unit according to an embodiment of the present invention, Fig. 2 is a perspective view of Fig. 1, Fig. 3 is a perspective view of a conventional condensing unit, and Fig. 4 is a plan view of Fig. 3. FIG. 1... Unit base, 2... Compressor, 3... Fin condenser, 4...
...Fan duct, 6...Fan motor, 6.
...Fan, 7...Receiver tank,
8... High pressure side servine valve, 9...
Low pressure side service valve, 10a, 1ob...High pressure side refrigerant pipe, 11...Low pressure side refrigerant pipe, 12...
...Windshield.

Claims (1)

[Claims] It consists of a compressor, a fin condenser, a fan duct, a fan motor, a fan, a receiver tank, a high-pressure side service valve, a low-pressure side service valve, a high-pressure side refrigerant pipe, a low-pressure side refrigerant pipe, and a unit base on which these are mounted, and the low-pressure side A condensing unit characterized by having a windshield between the refrigerant pipe and the fan motor.