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injector

A technology of injectors and refrigerants, which is applied in the direction of injection pumps, subcoolers, machines/engines, etc., and can solve the problems of increasing the shape of the drive device and the shape of the valve core, etc.

Inactive Publication Date: 2016-10-19
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, for the spool that simultaneously changes the refrigerant passage area in the pressure-reducing space and the refrigerant passage area in the pressure-increasing space like the ejector of the prior application example, for example, there is a difference from changing only the refrigerant in the decompression space. The spool with a change in passage area is concerned about the increase in size compared to the external shape
In addition, since the load received by the valve body from the refrigerant also increases, the external shape of the drive device for displacing the valve body also increases, and the entire injector may be enlarged.

Method used

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Experimental program
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no. 1 approach

[0035] use Figure 1 to Figure 4 A first embodiment of the present invention will be described. Such as figure 1 As shown, the ejector 13 of the present embodiment is applied to a refrigeration cycle apparatus including an ejector as a refrigerant decompression mechanism, that is, an ejector type refrigeration cycle system 10 . In addition, this ejector refrigeration cycle system 10 is applied to a vehicle air-conditioning apparatus, and functions to cool blown air blown into a vehicle interior as a space to be air-conditioned.

[0036] First, in the ejector refrigeration cycle system 10, the compressor 11 sucks in the refrigerant, pressurizes the refrigerant to high pressure, and discharges it. Specifically, the compressor 11 of the present embodiment is an electric compressor configured by accommodating a fixed-capacity compression mechanism 11 a and an electric motor 11 b that drives the compression mechanism 11 a in a single casing.

[0037] Various compression mechanis...

no. 2 approach

[0107] In the first embodiment, an example was described in which the drive device 37 for displacing the valve element 35 is configured using the diaphragm 37a, which is a pressure responsive member. However, in the present embodiment, as Figure 5 As shown, an electric driving device composed of a stepping motor 41 connected to the spool 35 is used. It should be noted that the operation of the stepping motor 41 is controlled by control pulses output from the control device.

[0108] In addition, a detection mechanism for detecting the temperature and pressure of the refrigerant on the outlet side of the evaporator 14 is connected to the control device of the present embodiment. Then, the control device calculates the degree of superheat of the refrigerant at the outlet side of the evaporator 14 based on the detection signals of these detection means, and controls the operation of the stepping motor 41 so that the calculated degree of superheat approaches a predetermined targe...

no. 3 approach

[0112] In this embodiment, if Image 6 As shown, the leg portion 36a is omitted, and the passage forming member 36 and the valve body 35 (specifically, the plate member 39 ) are connected via the vibration buffer member 36b. As the vibration buffer member 36b, for example, elastic members such as coil springs or resin materials that can suppress the vibration of the passage forming member 36 from being transmitted to the valve body 35 via the plate member 39 and the center-side operating rod 38b can be used.

[0113] By providing such a vibration buffer member 36b, the load due to the pressure received by the passage forming member 36 from the refrigerant is suppressed from being transmitted to the valve body 35 via the plate member 39, so that the drive device 37 actually displaces only the valve body 35. Therefore, even if the passage forming member 36 is connected to the valve body 35 via the vibration damping member 36b, the injector 13 can be downsized similarly to the fi...

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Abstract

The invention provides an injector. The refrigerant that passes between the inner peripheral surface of the decompression space (30b) formed inside the main body (30) and the outer peripheral surface of the valve element (35) that changes the refrigerant passage area of ​​the minimum area part (30m) The passage functions as a nozzle, and the refrigerant passage formed between the inner peripheral surface of the pressurization space (30e) formed inside the main body (30) and the outer peripheral surface of the passage forming member (36) serves as a diffuser. And play a function, constitute injector thus. In addition, the spool (35) and passage forming member (36) are formed by independent parts, and the load of the spool (35) from the refrigerant can be reduced, so that the driving device (37) for displacing the spool (35) can be realized. miniaturization. Accordingly, regardless of the thermal load of the ejector refrigeration cycle system, the ejector capable of exhibiting high energy conversion efficiency can be downsized.

Description

[0001] Cross-references to related applications [0002] This application claims priority based on JP Patent application 2012-153320 for which it applied on July 9, 2012, The content of an indication is taken in in this application by reference. technical field [0003] The present invention relates to an ejector which depressurizes fluid and attracts the fluid by the suction of ejected fluid ejected at high speed. Background technique [0004] Conventionally, an ejector is known as a decompression device applied to a vapor compression type refrigeration cycle device. This type of injector has a nozzle part that decompresses the refrigerant, and the gas-phase refrigerant flowing out of the evaporator can be sucked by the suction effect of the spray refrigerant sprayed from the nozzle part, and the spray refrigerant and suction can be combined by the booster part (diffuser part). The refrigerant is mixed to increase the pressure. [0005] Therefore, in a refrigeration cycle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04F5/46F25B1/00
CPCF04F5/18F04F5/461F25B41/00F25B2341/0012F25B41/335F25B27/00F25B40/02F25B2327/001F25B2400/23F25B2500/18F04F5/20F04F5/42F04F5/50F25B1/00
Inventor 山田悦久西岛春幸高野义昭
Owner DENSO CORP