CN212253248U - Ejector and air conditioner - Google Patents
Ejector and air conditioner Download PDFInfo
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- CN212253248U CN212253248U CN202020353242.XU CN202020353242U CN212253248U CN 212253248 U CN212253248 U CN 212253248U CN 202020353242 U CN202020353242 U CN 202020353242U CN 212253248 U CN212253248 U CN 212253248U
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- muffling chamber
- interference
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- 239000003507 refrigerant Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000004378 air conditioning Methods 0.000 claims abstract description 9
- 239000011358 absorbing material Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000011491 glass wool Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000008030 elimination Effects 0.000 abstract description 7
- 238000003379 elimination reaction Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
An ejector, comprising: the inlet section is connected with the liquid distributor; an outlet section connected to the indoor heat exchanger; and a resistive muffling chamber formed between the inlet section and the outlet section, the resistive muffling chamber having a cross-sectional area greater than a cross-sectional area of the inlet section. An air conditioning device using the ejector is also provided. The utility model provides an ejector, because the cross sectional area of resistance anechoic chamber takes place the sudden change for the entry, the produced noise of gas-liquid double-phase refrigerant arouses the change of impedance and produces reflection, the interference of sound energy in the propagation to reduce by resistance anechoic chamber, whole ejector external radiation's sound energy promptly, thereby reach the noise elimination purpose, the user of indoor side can not receive the interference, has improved the use comfort level of whole product. The utility model provides an ejector both is a thermodynamics throttling element, also is a mechanical vibration noise reduction device, has dual function.
Description
Technical Field
The utility model belongs to the technical field of air conditioning equipment, especially, relate to an ejector to and an air conditioning equipment who adopts this kind of ejector.
Background
The traditional air conditioner adopts a capillary tube as a throttling device (the capillary tube air conditioner is short). In the refrigerating cycle of the capillary air conditioner, a liquid distributor is connected at the downstream of a capillary tube, and each branch of the liquid distributor is connected with each branch of an evaporator. Because the capillary throttling efficiency is the lowest efficiency of all throttling forms, in order to improve the throttling efficiency, an ejector is gradually adopted to replace the capillary in the prior art.
The ejector (nozzle) expands high-pressure refrigerant (main flow) using an isentropic process to eliminate loss during expansion and increases the pressure of the collated refrigerant (suction flow) discharged from the evaporator outlet to reduce power consumption of the system. The nozzle in the prior art adopts a structure as shown in fig. 1, the throttling principle of the nozzle is explained by using a bernoulli equation, and the bernoulli equation between the sections 1-1 and 2-2 is as follows:
in the formula:
P1,υ1pressure and velocity at section 1-1;
P2,υ2pressure and velocity at section 2-2;
ξ local drag coefficient of fluid from section 1-1 to section 2-2
P liquid density
General formula of nozzle throttling pressure difference:
it can be seen that the nozzle has a throttling capability, and the streamlined and conical nozzles have the highest flow coefficient, so that the ejector is preferably designed to be streamlined or conical for the purpose of reducing energy-saving loss. Because of the difficulty in machining the streamlined ejector, it is now common to select a convergent nozzle of conical shape as shown in fig. 1, which has an actual machining flow coefficient of 0.9-0.95 and needs to maintain a high level of inner surface finish to improve the flow coefficient and wear resistance of the nozzle
The prior art fully considers the flow absorption and the energy conversion efficiency, but does not consider the problem of noise suppression. Because the ejector needs to be installed with indoor heat exchanger, that is, the supporting installation of evaporimeter, conical nozzle can produce great noise, and the noise directly produces the influence to the user, especially can disturb sleep night, reduces user's use experience.
SUMMERY OF THE UTILITY MODEL
The utility model discloses do not consider the throttle phase transition to the sprayer among the prior art, produce the problem of fluid noise easily, design and disclose a brand-new sprayer.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
an ejector, comprising: the inlet section is connected with the liquid distributor; an outlet section connected to the indoor heat exchanger; and a resistive muffling chamber formed between the inlet section and the outlet section, the resistive muffling chamber having a cross-sectional area greater than a cross-sectional area of the inlet section.
In order to maintain high throttling efficiency and achieve the double effects of high efficiency and low noise, the inlet section comprises: a conical tube section having a first end and a second end, wherein the first end has a cross-sectional diameter greater than the cross-sectional diameter of the second end, and the reactive muffling chamber has a diameter greater than the cross-sectional diameter of the second end.
To improve sound-deadening performance, the resistant sound-deadening chamber includes: an interference part, one end of which is fixedly arranged on the inner wall of the reactive muffling chamber, and the other end of which extends along the direction vertical to the flowing direction of the refrigerant or obliquely extends along the flowing direction of the refrigerant; the interference portion and an inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path.
Preferably, the interference portions are provided in two or more numbers, and any two adjacent interference portions are sequentially arranged in the refrigerant flow direction and extend toward each other.
The interference portion may be designed in a spiral shape for the purpose of noise elimination and reduction and smaller flow resistance at the same time.
The interference portion includes, for a specific noise frequency of the gas-liquid two-phase refrigerant: the upper end of the first interference plate is fixedly arranged on the inner wall of the reactive muffling chamber, the lower end of the first interference plate extends from top to bottom, and the lower end of the first interference plate and the inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path; and the second interference plate is arranged at the downstream of the first interference plate, the lower end of the second interference plate is fixedly arranged on the inner wall of the reactive muffling chamber, the upper end of the second interference plate extends from bottom to top, and the upper end of the second interference plate and the inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path.
Further, the outlet section is a straight pipe section, and the section diameter of the outlet section is smaller than that of the reactive muffling chamber.
In order to achieve the double results of resistance noise elimination and resistance noise elimination, the resistance noise elimination chamber is coated with a resistance sound absorption material, and the resistance sound absorption material is mineral wool, glass wool, felt or wood wool sound absorption boards.
Furthermore, a shell is arranged on the outer side of the resistant muffling chamber, the shell and the outer wall of the resistant muffling chamber enclose a muffling cavity together, and the resistive sound-absorbing material is filled in the muffling cavity.
Another aspect of the present invention provides an air conditioning apparatus, including an ejector; the ejector includes: the inlet section is connected with the liquid distributor; an outlet section connected to the indoor heat exchanger; and a resistive muffling chamber formed between the inlet section and the outlet section, the resistive muffling chamber having a cross-sectional area greater than a cross-sectional area of the inlet section.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
the utility model provides an ejector, because the cross sectional area of resistance anechoic chamber takes place the sudden change for the entry, the produced noise of gas-liquid double-phase refrigerant arouses the change of impedance and produces reflection, the interference of sound energy in the propagation to reduce by resistance anechoic chamber, whole ejector external radiation's sound energy promptly, thereby reach the noise elimination purpose, the user of indoor side can not receive the interference, has improved the use comfort level of whole product. The utility model provides an ejector both is a thermodynamics throttling element, also is a mechanical vibration noise reduction device, has dual function.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art injector;
FIG. 2 is a schematic diagram of a first embodiment of the disclosed injector;
FIG. 3 is a schematic diagram of a second embodiment of the disclosed injector;
fig. 4 is a schematic view of a refrigeration cycle of an air conditioning device employing the ejector shown in fig. 2 or 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
An ejector applied to an air conditioner is shown in fig. 2. For the dual requirements of energy conversion efficiency and noise suppression, the ejector 10 is preferably designed to consist of three parts, an inlet section 11, an outlet section 17 and a reactive muffling chamber 14, wherein the inlet section 11 is arranged downstream of the liquid separator 20 and is connected to the liquid separator 20, as shown in fig. 4. The liquid separator 20 is used before the evaporator to uniformly distribute the refrigerant of gas-liquid two-phase to each branch of the evaporator. Preferably, one ejector 10 is associated with each evaporator branch, i.e. the inlet section 11 of each ejector 10 is connected to a branch of the liquid distributor 20. The outlet section 17 of the ejector 10 is connected to the indoor heat exchanger 30, and the throttled refrigerant in a gas-liquid two-phase state flows into the indoor heat exchanger 30, i.e., each branch of the evaporator, via the plurality of ejectors 10. Between the inlet section 11 and the outlet section 17 there is also formed a resistant muffling chamber 14, the cross-sectional area of the resistant muffling chamber 14 being greater than the cross-sectional area of the inlet section 11. Because the cross-sectional area of the reactive muffling chamber 14 changes abruptly relative to the inlet section 11, the noise causes impedance change during propagation to generate reflection and interference of sound energy, so that the sound energy radiated outwards by the reactive muffling chamber 14, namely the whole ejector 10, is reduced, and the muffling purpose is achieved. The ejector is a thermodynamic throttling device and a mechanical vibration noise reduction device, and realizes double functions by one component, so that the number of parts of the whole refrigeration system can be reduced, and more use and design space can be saved for products.
As shown in fig. 2, the ejector 10 has a specific structure in which the inlet section 11 includes a conical pipe section having a first end 12 and a second end 13, wherein the first end 12 has a larger cross-sectional diameter than the second end 13, i.e., the conical pipe section is arranged from large to small in the refrigerant flow direction, and the reactive muffling chamber 14 has a larger diameter than the second end 13, i.e., the diameter of the reactive muffling chamber 14 is suddenly expanded with respect to the diameter of the conical pipe section to cause a sudden change in acoustic impedance in the passage, so that sound waves of certain frequencies propagating along the refrigerant pipe are not reflected back to the sound source by the ejector 10, thereby achieving muffling. Meanwhile, the conical pipe section can keep higher throttling efficiency, and double effects of high efficiency and low noise are achieved.
In order to improve the sound-deadening performance, an interference portion is further provided in the resistant sound-deadening chamber 14. One end of the interference portion is fixedly disposed on the inner wall of the reactive muffling chamber 14, and the other end extends in a direction perpendicular to the refrigerant flow direction and encloses a refrigerant flow path together with the inner wall of the reactive muffling chamber 14. In addition to the vertical arrangement, the interference portion may extend obliquely in the refrigerant flow direction and enclose a refrigerant flow path together with the inner wall of the reactive muffling chamber 14. According to the frequency range of the flowing noise of the gas-liquid two-phase refrigerant, two or more interference parts are arranged, and any two adjacent interference parts are sequentially distributed along the flowing direction of the refrigerant and extend oppositely. The interference part may be designed in the form of an interference plate, and may also be designed in a spiral shape. The helical interference portion has a smaller flow resistance on the one hand, and on the other hand, can also serve the purpose of noise elimination and noise reduction. For the purpose of noise suppression of specific frequencies, as shown in fig. 2, the interference plate includes a first interference plate 15 and a second interference plate 16. The upper end of the first interference plate 15 is fixedly disposed on the inner wall of the reactive muffling chamber 14, the lower end of the first interference plate 15 extends downward from above, and the lower end of the first interference plate 15 and the inner wall of the reactive muffling chamber 14 together enclose a refrigerant flow path. The second interference plate 16 is arranged at the downstream of the first interference plate 15, the lower end of the second interference plate 16 is fixedly arranged on the inner wall of the reactive muffling chamber 14, the upper end of the second interference plate 16 extends from bottom to top, and the upper end of the second interference plate 16 and the inner wall of the reactive muffling chamber 14 jointly enclose a refrigerant flow path. The first interference plate 15 and the second interference plate 16 can reflect and interfere sound waves in a specific noise frequency range of the gas-liquid two-phase refrigerant, so that the purpose of reducing noise is achieved.
Downstream of the resistant muffling chamber 14 is provided an outlet section 17. The outlet section 17 is preferably designed as a straight tube section, and the outlet section 17 has a cross-sectional area diameter smaller than that of the reactive muffling chamber 14, and is further preferably designed to be proportional to the flow rate of the refrigerant flowing through the ejector 10. To further improve the sound-damping effect, the outside of the resistant sound-damping chamber 14 is coated with a resistive sound-absorbing material 19. Specifically, as shown in fig. 3, a housing 18 is provided outside the resistant muffling chamber 14. The shell 18 and the outer wall of the resistant muffling chamber 14 jointly form a muffling cavity, and the resistive sound-absorbing material 19 is filled in the muffling cavity, so that the muffling effects of resistant muffling and resistive muffling are combined. The resistive sound absorbing material 19 is preferably mineral wool, glass wool, felt or wood wool sound absorbing panels.
Another aspect of the present invention provides an air conditioning apparatus. Including an ejector. The detailed structure and function of the ejector are referred to the detailed description of the above embodiments, and are not repeated herein, and the same technical effects can be achieved by the air conditioning device provided with the ejector. The air conditioning device may be a wall mounted air conditioner, a window air conditioner, a floor standing air conditioner, a heat pump device, or the like.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (10)
1. An ejector, characterized by: the method comprises the following steps:
the inlet section is connected with the liquid distributor;
an outlet section connected to the indoor heat exchanger; and
a resistive muffling chamber formed between the inlet section and the outlet section, the resistive muffling chamber having a cross-sectional area greater than a cross-sectional area of the inlet section.
2. The injector of claim 1, wherein:
the inlet section includes:
a conical tube section having a first end and a second end, wherein the first end has a cross-sectional diameter greater than the cross-sectional diameter of the second end, and the reactive muffling chamber has a diameter greater than the cross-sectional diameter of the second end.
3. The injector of claim 2, wherein:
the resistive anechoic chamber includes:
an interference part, one end of which is fixedly arranged on the inner wall of the reactive muffling chamber, and the other end of which extends along the direction vertical to the flowing direction of the refrigerant or obliquely extends along the flowing direction of the refrigerant;
the interference portion and an inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path.
4. The injector of claim 3, wherein:
the interference parts are arranged into two or more than two, and any two adjacent interference parts are sequentially distributed along the flowing direction of the refrigerant and extend oppositely.
5. The injector of claim 4, wherein:
the interference portion is spiral.
6. The injector of claim 4, wherein:
the interference portion includes:
the upper end of the first interference plate is fixedly arranged on the inner wall of the reactive muffling chamber, the lower end of the first interference plate extends from top to bottom, and the lower end of the first interference plate and the inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path; and
and the second interference plate is arranged at the downstream of the first interference plate, the lower end of the second interference plate is fixedly arranged on the inner wall of the reactive muffling chamber, the upper end of the second interference plate extends from bottom to top, and the upper end of the second interference plate and the inner wall of the reactive muffling chamber jointly enclose a refrigerant flow path.
7. The injector of claim 5, wherein:
the outlet section is a straight pipe section, and the section diameter of the outlet section is smaller than that of the reactive muffling chamber.
8. The ejector according to any one of claims 1 to 7, wherein:
the resistance muffling chamber is coated with a resistance sound-absorbing material; the resistive sound absorption material is mineral wool, glass wool, felt or wood wool sound absorption board.
9. The injector of claim 8,
the resistance muffling chamber is characterized in that a shell is arranged on the outer side of the resistance muffling chamber, the shell and the outer wall of the resistance muffling chamber jointly enclose a muffling cavity, and the resistance sound-absorbing material is filled in the muffling cavity.
10. An air conditioning device, characterized by comprising an ejector according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020353242.XU CN212253248U (en) | 2020-03-19 | 2020-03-19 | Ejector and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020353242.XU CN212253248U (en) | 2020-03-19 | 2020-03-19 | Ejector and air conditioner |
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| Publication Number | Publication Date |
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| CN212253248U true CN212253248U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020353242.XU Active CN212253248U (en) | 2020-03-19 | 2020-03-19 | Ejector and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351272A (en) * | 2020-03-19 | 2020-06-30 | 青岛海尔空调器有限总公司 | Ejector and air conditioner |
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2020
- 2020-03-19 CN CN202020353242.XU patent/CN212253248U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351272A (en) * | 2020-03-19 | 2020-06-30 | 青岛海尔空调器有限总公司 | Ejector and air conditioner |
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