JPH04110344U - air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] An air system that generates little noise when returning refrigerant gas from the discharge side of the compressor to the compression side, and that does not require much effort or time in the refrigeration cycle assembly process. Provision of harmonizer. [Structure] A refrigeration cycle is provided in which a compressor, a condenser, a pressure reducing valve, and an evaporator are connected via a refrigerant pipe, and a communication pipe connects the suction pipe 7 and discharge pipe 8 of the compressor 2 of this refrigeration cycle. 9 and a flow rate regulating valve 10 provided in the communication pipe 9 are housed in a sealed main body casing 11 of the compressor 2. [Function] In the above air conditioner, the communication pipe 9 and the flow rate adjustment valve 10 are housed in the sealed main body casing 11 of the compressor 2, so the noise when the refrigerant passes through the flow rate adjustment valve 10 is suppressed from the main body. There is almost no leakage from the casing 11 to the outside. Further, much effort and time are not required during the assembly process of the refrigeration cycle.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an air conditioner equipped with a refrigeration cycle, and particularly relates to an air conditioner equipped with a refrigeration cycle. The present invention relates to an improvement in the piping structure of a communication pipe connecting the discharge side and suction side of a compressor.

0002

[Conventional technology]

FIG. 3 shows an example of the refrigeration cycle of the air conditioner as described above. In the refrigeration cycle _1a shown in the figure, refrigerant gas compressed by the compressor _2a and discharged into the discharge pipe 8 is cooled and liquefied in the outdoor condenser 3. Then, the pressure of this liquid refrigerant is reduced by the pressure reducing valve 4, a part of it is vaporized, and further evaporated in the evaporator 5 inside the room. At this time, the refrigerant cools the indoor air by receiving heat as latent heat of vaporization from the indoor air and gasifying it, and then returns to the compressor _2a via the suction pipe 7 and the accumulator 12. There is. Since the compressor _2a used in the refrigeration cycle _1a is configured to always compress a fixed amount of refrigerant gas _, it is necessary to respond to changes in the cooling capacity required indoors (hereinafter referred to as cooling load). , a communication pipe 9 connecting the suction pipe 7 and the discharge pipe 8 of the compressor _2a is provided, and a flow rate adjustment valve with a variable opening degree, for example, is provided in the communication pipe 9 to adjust the flow rate of the refrigerant gas. 10 are provided. As shown in FIG. 4, the compressor 2 _a includes a compressor 13 that compresses refrigerant gas and a drive unit 14 that drives the compressor 13 in a sealed main body casing 11 _a . . A discharge pipe 8 is connected to the main body casing _11a , and a suction pipe 7 from the accumulator 12 is connected to the cylinder 18 of the compression section 13 fixed to the bearing plate 21. The drive section 14 includes a stator 15 fixed to the main casing _11a and a rotor 16 that functions as a drive side. A rotary piston 20 is provided eccentrically from the axis of the shaft 17 at the end of the shaft 17 that is axially installed on the rotor 16 , and is housed in the cylinder 18 . In such a refrigeration cycle _1a , even if the cooling load on the indoor side changes during operation, the amount of refrigerant gas compressed by the compressor 2a remains constant, so the amount of refrigerant gas compressed by the compressor _2a remains constant, so that the amount of refrigerant gas compressed by the compressor 2a remains constant, so that the amount of refrigerant gas compressed by the compressor 2a remains constant. Therefore, the valve opening degree of the flow rate adjustment valve 10 of the communication pipe 9 is adjusted. That is, by adjusting the amount of refrigerant gas returned from the discharge pipe 8 on the high pressure side to the suction pipe 7 on the low pressure side, the amount of refrigerant sent to the evaporator 5 in the room is controlled. Cooling capacity control methods that return part of the compressed refrigerant gas from the discharge side to the suction side include, for example, cooling capacity control methods that always turn on and off a compressor that compresses a constant amount of refrigerant gas, and cooling capacity control methods that return a portion of the compressed refrigerant gas from the discharge side to the suction side. Compared to the cooling capacity control method that uses a circuit to change the rotation speed of the compressor's rotating piston, this method has the advantage of requiring fewer ON/OFF operations that require large amounts of starting power, and does not require an expensive inverter circuit. It has the following advantages.

0003

[Problem that the idea aims to solve]

However, in the above-described refrigeration cycle 1 _a in which a portion of the refrigerant is returned from the discharge side to the suction side of the compressor 2 _a , unpleasant noise is generated when the refrigerant gas passes through the flow rate regulating valve 10 . This is especially true when the opening degree of the flow rate regulating valve 10 is small and the pressure difference between the refrigerant gas on the discharge side and the suction side is large. Furthermore, the communication pipe 9 also requires a piping structure to absorb vibrations from the compressor 2 _a , and the pipe shape must be devised to prevent contact between the communication pipe 9 and other refrigerant pipes 6. there were. Therefore, a lot of effort and time were required when assembling the refrigeration cycle. Therefore, the purpose of the present invention is to reduce the noise generated when refrigerant gas is returned from the discharge side to the suction side of the compressor, and to reduce the amount of time and effort required for the refrigeration cycle assembly process. There is no air conditioner provided.

0004

[Means to solve the problem]

In order to achieve the above purpose, the main means adopted by this invention are as follows: However, a refrigeration cycle in which predetermined cycle elements are connected via refrigerant pipes is not available. E., refrigerant flows through the communication pipe connecting the suction side and discharge side of the compressor of the refrigeration cycle. In an air conditioner equipped with a flow rate adjustment means, the communication pipe and the refrigerant flow An air conditioner in which the amount adjusting means is housed in the sealed main body casing of the compressor. It is constructed as a Japanese machine.

[0005]

[Effect]

According to the air conditioner according to the present invention, the suction side and the discharge side of the compressor of the refrigeration cycle are A communication pipe is provided to connect the two, and a refrigerant flow rate adjustment means is provided in this communication pipe. ing. The communication pipe and the refrigerant flow rate adjusting means are connected to the compressor in a sealed manner. It is housed inside the main casing. Therefore, the refrigerant on the discharge side of the compressor is Most of the noise generated when the refrigerant passes through the flow rate adjustment means comes from the main body casing. It never leaks. Also, when assembling the above refrigeration cycle, it is necessary to For example, there is no need to consider piping measures such as vibration absorption.

[0006]

【Example】

Embodiments embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following embodiment is an example embodying the present invention, and is not intended to limit the technical scope of the present invention. Here, FIG. 1 is a side sectional view showing a compressor of a refrigeration cycle included in an air conditioner according to one embodiment of the present invention, and FIG. 2 is a side sectional view showing a refrigeration cycle of an air conditioner according to another embodiment of the present invention. FIG. However, the same reference numerals are used _for elements common to the refrigeration cycle 1 _a and the compressor 2 _a of the conventional air conditioner shown in FIGS. 3 and 4 _{, and} detailed description thereof will be omitted. The refrigeration cycle provided in the air conditioner according to this embodiment has almost the same basic structure as the conventional refrigeration cycle _1a described above, and the differences from the conventional refrigeration cycle _1a described above are as shown in FIG. , a communication pipe 9 and a flow rate regulating valve 10 provided in the communication pipe 9 are housed in a sealed main body casing 11 of the compressor 2, and each end of the communication pipe 9 is connected to a suction pipe within the main body casing 11. 7 and a discharge pipe 8. Both ends of the communication pipe 9 are fixed not only by the discharge pipe 8 or the suction pipe 7 but also by the stator 15 and the bearing plate 21 of the drive section 14. Further, since the communication pipe 9 is housed within the relatively compact main body casing 11, the length of the pipe is set to be extremely short. The main body casing 11 has a structure in which the communication pipe 9 and the flow rate regulating valve 10 are housed, and thus has a slightly larger capacity than the conventional main body casing _11a . Furthermore, since the communication pipe 9 and the flow rate adjustment valve 10 are integrally provided within the main body casing 11, vibrations of the communication pipe 9 and the flow rate adjustment valve 10, which are conventional, can be absorbed when assembling the refrigeration cycle. There is no need for a configuration for avoiding contact with other refrigerant pipes 6 or for avoiding contact with other refrigerant pipes 6. Therefore, much effort and time are not required for the assembly process of the refrigeration cycle.

[0007] Therefore, when operating the refrigeration cycle of an air conditioner with the above configuration, it is necessary to When the side cooling load is higher than a predetermined value, the flow rate adjustment valve 10 of the communication pipe 9 is closed. and the refrigeration cycle is operated at maximum cooling capacity. Continuing with the above cooling load When the value falls below a predetermined value, the flow rate regulating valve 10 is activated by a command signal from a control section (not shown). Open the valve and increase the valve opening according to the degree of decrease in the cooling load. Therefore, high The refrigerant gas from the high-pressure discharge pipe 8 flows through the communication pipe 9 and the flow rate adjustment valve 10, and the refrigerant gas flows through the low-pressure discharge pipe 8. Return to suction pipe 7. Then, when the refrigerant gas passes through the flow rate regulating valve 10, it causes discomfort. A loud noise is generated. However, the communication pipe 9 and the flow rate adjustment valve 10 are sealed. Since it is housed within the main body casing 11, most of the noise generated above is removed from the casing. No leakage outside the sing. The compressor 2 is a reversible refrigeration system that performs heating and cooling operations as shown in Figure 2. It can also be used for vehicle 1. In this refrigeration cycle 1, the outdoor heat exchanger 3 ( 5), the path of the refrigerant flowing through the pressure reducing valve 4 and the indoor heat exchanger 5 (3) is the four-way valve 21 cooling operation (the flow of refrigerant is controlled by the solid arrow) ) or heating operation (the flow of the refrigerant is shown by the dashed arrow). In addition , the effect of using the compressor 2 in the refrigeration cycle 1 is similar to the effect of the previous embodiment. Needless to say, it is.

[0008]

[Effect of the idea]

According to the present invention, a refrigeration system is constructed by connecting predetermined cycle elements via refrigerant pipes. a communication pipe connecting the suction side and the discharge side of the compressor of the refrigeration cycle; In an air conditioner comprising a refrigerant flow rate adjusting means, the communication pipe and the The refrigerant flow rate adjusting means is housed in the sealed body casing of the compressor. An air conditioner with features is provided. This directs the refrigerant gas to the discharge side of the compressor. There is very little noise that is generated when the air is returned to the suction side and leaks out of the main casing. addition Therefore, the assembly process of the above-mentioned refrigeration cycle does not require much labor and time. .

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a compressor of a refrigeration cycle included in an air conditioner according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a refrigeration cycle of an air conditioner according to another embodiment of the present invention.

FIG. 3 is a configuration diagram showing a refrigeration cycle included in a conventional air conditioner, which is an example of the background of the present invention.

FIG. 4 is a side sectional view showing the compressor of the conventional refrigeration cycle.

[Explanation of symbols]

1, 1 _a ... Refrigeration cycle 2, 2 _a ... Compressor 3... Condenser 4... Pressure reducing valve 5... Evaporator 6... Refrigerant pipe 7... Suction pipe 8... Discharge pipe 9... Communication pipe 10... Flow rate adjustment valve 11, 11 _a …Body casing

Claims (1)

[Scope of utility model registration request] Claim 1: A refrigeration cycle is provided in which predetermined cycle elements are connected via refrigerant pipes, and a refrigerant flow rate adjusting means is provided in a communication pipe connecting a suction side and a discharge side of a compressor of the refrigeration cycle. An air conditioner comprising: the communication pipe and the refrigerant flow rate adjusting means are housed in a sealed main body casing of the compressor.