CN212253252U - Bidirectional space-variable spiral vertical flash evaporator and heat pump system with same - Google Patents
Bidirectional space-variable spiral vertical flash evaporator and heat pump system with same Download PDFInfo
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- CN212253252U CN212253252U CN202020721920.3U CN202020721920U CN212253252U CN 212253252 U CN212253252 U CN 212253252U CN 202020721920 U CN202020721920 U CN 202020721920U CN 212253252 U CN212253252 U CN 212253252U
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Abstract
The utility model is suitable for the technical field of chemical equipment manufacturing, and provides a bidirectional variable space spiral vertical flash evaporator, which comprises an upper shell and a lower shell which are connected in a sealing way; the upper shell is of a three-dimensional spiral structure, and the top of the upper shell is provided with a gas outlet; the bottom of the lower shell is provided with a gas-liquid two-phase inlet and a liquid outlet, and the inside of the lower shell is also provided with a baffle plate which is arranged between the gas-liquid two-phase inlet and the liquid outlet; the baffle is provided with a plurality of liquid equalizing oil return holes. The utility model also provides a heat pump system who has flash vessel. Therefore, the utility model discloses can both realize the high-efficient separation of gas-liquid, can realize the function of two-way oil return and homogeneous liquid again, improve the security and the stability of compressor, provide the solution for the jet enthalpy-increasing heat pump air conditioning system two-way operation's of flash vessel integrated minimizing design.
Description
Technical Field
The utility model relates to a chemical industry equipment manufacturing technical field especially relates to a vertical flash vessel of two-way variable space spiral and have heat pump system of this flash vessel.
Background
The existing small heat pump air conditioner has two functions of heating and refrigerating, and the switching of the functions is realized by a four-way reversing valve connected with an exhaust port of a compressor. And the intermediate enhanced vapor injection technology applied to severe cold areas and severe summer zones has proved to have the obvious effects of strengthening output load, improving working state and increasing COP value under the working condition of large working temperature difference. The flash evaporator is used as a main part of intermediate enhanced vapor injection, and the gas-liquid separation efficiency and reliability of the flash evaporator are main factors influencing the performance of the unit.
The conventional flash evaporator mainly adopts the gravity separation effect, and partially increases auxiliary structures such as a filter screen, an orifice plate grid and the like to strengthen the separation efficiency, but the main structure of the conventional flash evaporator is similar to that of a liquid storage device, and the gas-liquid two-phase flow generally enters a shell from the middle part or above and has the problem of difficult bottom oil return. And part of flash evaporation gas is reversed through valve bank switching, so that the system structure is complex. Therefore, it is a technical problem to be solved by those skilled in the art to improve the structure of the flash evaporator, improve the gas-liquid separation efficiency of the flash evaporator, and simultaneously achieve a bidirectional function beneficial to oil return.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
To foretell defect, the utility model aims to provide a two-way vertical flash vessel of space spiral that becomes and heat pump system who has this flash vessel, it can realize the high-efficient separation of gas-liquid, realizes the function that can two-way oil return and homocline, improves the security and the stability of compressor, provides solution for the integrated minimizing design of the jet enthalpy-increasing heat pump air conditioning system two-way operation of flash vessel.
In order to achieve the purpose, the utility model provides a bidirectional variable space spiral vertical flash evaporator, which comprises an upper shell and a lower shell which are connected in a sealing way; the upper shell is of a three-dimensional spiral structure, and a gas outlet is formed in the top of the upper shell; the bottom of the lower shell is provided with a gas-liquid two-phase inlet and a liquid outlet which are symmetrical, and a baffle is arranged in the lower shell and is arranged between the gas-liquid two-phase inlet and the liquid outlet; and the baffle is provided with a plurality of liquid equalizing oil return holes.
According to the utility model discloses a two-way vertical flash vessel of variable space spiral, the double-phase entry of gas-liquid and liquid outlet are located the inside part of casing all is equipped with the side stream mouth down, and two the side stream mouth sets up dorsad.
According to the utility model discloses a two-way vertical flash vessel of variable space spiral, the function can be switched each other to the double-phase entry of gas-liquid, liquid outlet under heating, refrigeration operating mode.
According to the utility model discloses a two-way variable space spiral vertical flash evaporator, the utility model also provides a heat pump system with the flash evaporator, which comprises a compressor, wherein the compressor is respectively connected with a condenser and an evaporator; the outlet of the condenser is connected with the gas-liquid two-phase inlet of the flash evaporator, the inlet of the evaporator is connected with the liquid outlet of the flash evaporator, and the gas outlet of the flash evaporator is connected with the compressor.
According to the heat pump system of the utility model, the flash evaporator is provided with two flash evaporators, including a first flash evaporator and a second flash evaporator, the liquid outlet of the first flash evaporator is connected with the gas-liquid two-phase inlet of the second flash evaporator; a gas-liquid two-phase inlet of the first flash device is connected with the condenser; the liquid outlet of the second flash evaporator is connected with the evaporator, and the gas outlet of the first flash evaporator and the gas outlet of the second flash evaporator are respectively connected with the working fluid inlet and the injection fluid inlet of the ejector; the mixed fluid outlet of the ejector is connected with the compressor; and a throttle valve is connected between the first flash evaporator and the second flash evaporator.
The utility model aims to provide a bidirectional variable space spiral vertical flash evaporator, which is provided with an upper shell and a lower shell which are connected in a sealing way; the upper shell is of a three-dimensional spiral structure, the gas containing liquid drops and rising buoyancy force are influenced by the three-dimensional variable space spiral shell to form passive spiral airflow, and under the coupling action of gravity, centrifugal force and surface tension, the gas mixed with liquid drops is separated to the inner wall surface of the upper shell 1 and then flows downwards along the wall surface to converge into a liquid accumulation area below the flash evaporator, so that the separation efficiency of the gas and the liquid refrigerant is higher; the lower shell is provided with a gas-liquid two-phase inlet and a liquid outlet, and the functions can be switched mutually under the working conditions of heating and refrigerating to realize bidirectional oil return; the gas-liquid two-phase inlet and the liquid outlet are provided with side flow ports, so that bubbles can be reduced to flow to the liquid outlet, and the separation effect is improved. To sum up, the beneficial effects of the utility model are that: the gas-liquid separation efficiency is high, the function of bidirectional oil return and liquid equalization is realized, the safety and the stability of the compressor are improved, and a solution is provided for the integrated reduction design of the bidirectional operation of the vapor injection enthalpy-increasing heat pump air-conditioning system of the flash evaporator.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 taken along line A-A;
FIG. 3 is a schematic view of the baffle structure of the present invention;
fig. 4 is a schematic structural diagram of the heat pump system of the present invention;
in the figure: 1-an upper shell, 2-a lower shell, 3-a gas-liquid two-phase inlet, 4-a liquid outlet, 5-a baffle and 51-a uniform liquid return hole; 6-gas outlet, 7-side flow port, 8-compressor, 81-condenser, 82-evaporator, 83-first flash evaporator, 831-second flash evaporator, 84-throttling valve and 85-ejector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the utility model provides a bidirectional space-variable spiral vertical flash evaporator, which comprises an upper shell 1 and a lower shell 2 which are hermetically connected; the upper shell 1 is of a three-dimensional spiral structure, and a gas outlet 6 is formed in the top of the upper shell 1 after the top of the upper shell is gradually reduced; the bottom of the lower shell 2 is provided with a gas-liquid two-phase inlet 3 and a liquid outlet 4, referring to fig. 1 and 3, the inside of the lower shell 2 is also provided with a baffle 5, and the baffle 5 is arranged between the gas-liquid two-phase inlet 3 and the liquid outlet 4; the baffle 5 is provided with a plurality of liquid-equalizing oil return holes 51, and the liquid-equalizing oil return holes 51 are used for returning oil and equalizing liquid. The lower casing 2 forms a liquid accumulation zone.
The gas-liquid two-phase flow enters from the gas-liquid two-phase inlet 3, and because the gas-liquid two-phase flow has a certain pressure when entering, the gas can form bubbles, the size of the bubbles can be basically measured according to the flow rate and physical parameters of a refrigerant, and the aperture of the liquid homogenizing oil return hole 51 is designed according to the size of the bubbles, so that the bubbles are limited and cannot pass through the liquid homogenizing oil return hole 51, the gas is reduced to be discharged through the liquid outlet 4, and the disturbance of the gas on the liquid at the liquid outlet 4 is avoided; therefore, the liquid and the lubricating oil in the substantially gas-liquid two-phase flow passing through the homogeneous liquid return hole 51 are discharged from the liquid outlet 4.
The parts of the gas-liquid two-phase inlet 3 and the liquid outlet 4, which are positioned in the lower shell 2, are provided with side flow ports 7, and the two side flow ports 7 are arranged in a back-to-back manner; the utility model discloses an inflow, the outflow scheme of side flow mouth 7 had both reduced the influence of bubble buoyancy lift to bottom hydrops district, and reducible bubble is flowed to liquid outlet 4 again in, the separation effect of improvement gas-liquid two-phase flow.
The utility model discloses in, the function can be switched over each other to gas-liquid double-phase entry 3, liquid outlet 4 under heating, refrigeration operating mode to make both sides functional area each other not influence through baffle 5, realized need not the function that auxiliary device can two-way oil return.
The gas floated in the upper shell 1 rises along a spiral flow channel on the upper part of the upper shell 1 and is restrained by a three-dimensional spiral boundary condition, a spiral airflow is formed in the flowing process, liquid drops are separated to the inner wall of the shell due to the action of centrifugal force, and then the liquid drops slide to a liquid accumulation area of the lower shell 2 at the bottom along the inner wall surface under the influence of surface tension and working medium viscosity; the liquid entering one side of the gas-liquid two-phase inlet 3 passes through the liquid equalizing oil return hole 51 to enter one side of the liquid outlet 4 and is discharged from the liquid outlet 4, so that the gas-liquid two-phase separation is completed, and the separation effect is good.
The bidirectional variable space spiral vertical flash evaporator has the advantages that: the liquid level of the gas-liquid two-phase refrigerant in the flash evaporator and the position of the gas-liquid two-phase inflow port can be passively adjusted according to the change of the operating condition of the heat pump system where the flash evaporator is located; the inflow and outflow scheme of the side flow port 7 reduces the series flow of bubbles to the liquid outlet 4; the baffle 5 can block the mutual influence of different functional areas at two sides, and the liquid homogenizing and oil returning hole 51 arranged on the baffle 5 has the functions of homogenizing liquid and returning oil; the gas-liquid two-phase inlet 3 and the liquid outlet 4 can be switched between functions under heating and refrigerating working conditions, so that bidirectional oil return is realized; the upper shell 1 is a three-dimensional spiral flow passage, the ascending air flow is further subjected to gas-liquid separation under the action of spiral centrifugal force, gravity and surface tension, and the three-dimensional spiral flow passage increases a traveling path of gas-liquid two-phase flow in the upper shell 1, so that the gas-liquid two-phase separation time is prolonged, and the separation effect is improved. Therefore, the utility model discloses both realized the function of two-way oil return, high-efficient separation, had simple structure, the convenient characteristics of control again.
Referring to fig. 4, the present invention further provides a heat pump system having the flash evaporator, including a compressor 8, wherein the compressor 8 is connected to a condenser 81 and an evaporator 82 respectively; the outlet of the condenser 81 is connected with a gas-liquid two-phase inlet 2 of the flash evaporator, the inlet of the evaporator 82 is connected with a liquid outlet 4 of the flash evaporator, and a gas outlet 3 of the flash evaporator is connected with a compressor 8.
In the utility model, two flash evaporators are provided, including a first flash evaporator 83 and a second flash evaporator 831, a liquid outlet 4 of the first flash evaporator 83 is connected with a gas-liquid two-phase inlet 2 of the second flash evaporator 831; the gas-liquid two-phase inlet 2 of the first flash evaporator 83 is connected with the condenser 81; the liquid outlet 4 of the second flash evaporator 831 is connected with the evaporator 82, and the gas outlet of the first flash evaporator 83 and the gas outlet of the second flash evaporator 831 are respectively connected with the working fluid inlet and the injection fluid inlet of the ejector 85; the mixed fluid outlet of the ejector 85 is connected to the compressor 8. A throttle valve 84 is connected between the first flash evaporator 83 and the second flash evaporator 831.
When the working fluid inlet and the injection fluid inlet of the ejector 85 are switched between the refrigerating and heating working conditions, the valve of the ejector 85 is switched to change the direction, so that the function of bidirectional operation is realized.
Because the utility model discloses a flash vessel gas-liquid separation is efficient, and the tonifying qi contains the liquid rate low, and the liquid refrigerant of deriving from condenser 2 will be through the two-stage separation of first flash vessel 83 and second flash vessel 831The gas phase in the refrigerant is largely separated and directly enters the compressor 8 through the ejector 85, part of useful energy is recovered, the compression work of the compressor 8 on the part of steam is saved, the heat exchange efficiency of the evaporator is improved, and the heat pump system is greatly improved
Efficiency, the security that improves the compressor.
In summary, the utility model is provided with the upper shell and the lower shell which are connected in a sealing way; the upper shell is of a three-dimensional spiral structure, the gas containing liquid drops and rising buoyancy force are influenced by the three-dimensional variable space spiral shell to form passive spiral airflow, and under the coupling action of gravity, centrifugal force and surface tension, the gas mixed with liquid drops is separated to the inner wall surface of the upper shell 1 and then flows downwards along the wall surface to converge into a liquid accumulation area below the flash evaporator, so that the separation efficiency of the gas and the liquid refrigerant is higher; the lower shell is provided with a gas-liquid two-phase inlet and a liquid outlet, and the functions can be switched mutually under the working conditions of heating and refrigerating to realize bidirectional oil return; the gas-liquid two-phase inlet and the liquid outlet are provided with side flow ports, so that bubbles can be reduced to flow to the liquid outlet, and the separation effect is improved. To sum up, the beneficial effects of the utility model are that: the gas-liquid separation efficiency is high, the function of bidirectional oil return and liquid equalization is realized, the safety and the stability of the compressor are improved, and a solution is provided for the integrated reduction design of the bidirectional operation of the vapor injection enthalpy-increasing heat pump air-conditioning system of the flash evaporator.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (5)
1. A bidirectional space-variable spiral vertical flash evaporator is characterized by comprising an upper shell and a lower shell which are connected in a sealing manner; the upper shell is of a three-dimensional spiral structure, and a gas outlet is formed in the top of the upper shell; the bottom of the lower shell is provided with a gas-liquid two-phase inlet and a liquid outlet which are symmetrical, and a baffle is arranged in the lower shell and is arranged between the gas-liquid two-phase inlet and the liquid outlet; and the baffle is provided with a plurality of liquid equalizing oil return holes.
2. The dual-direction space-changing spiral vertical flash evaporator according to claim 1, wherein the portions of the gas-liquid two-phase inlet and the liquid outlet inside the lower shell are provided with side flow ports, and the two side flow ports are arranged oppositely.
3. The two-way space-changing spiral vertical flash evaporator according to claim 1, wherein the gas-liquid two-phase inlet and the liquid outlet switch functions with each other under heating and cooling conditions.
4. A heat pump system having the flash evaporator of claim 1, comprising a compressor connected to the condenser and the evaporator, respectively; the outlet of the condenser is connected with the gas-liquid two-phase inlet of the flash evaporator, the inlet of the evaporator is connected with the liquid outlet of the flash evaporator, and the gas outlet of the flash evaporator is connected with the compressor.
5. The heat pump system of claim 4, wherein the number of the flash evaporators is two, and the flash evaporators comprise a first flash evaporator and a second flash evaporator, and a liquid outlet of the first flash evaporator is connected with a gas-liquid two-phase inlet of the second flash evaporator; a gas-liquid two-phase inlet of the first flash device is connected with the condenser; the liquid outlet of the second flash evaporator is connected with the evaporator, and the gas outlet of the first flash evaporator and the gas outlet of the second flash evaporator are respectively connected with the working fluid inlet and the injection fluid inlet of the ejector; the mixed fluid outlet of the ejector is connected with the compressor; and a throttle valve is connected between the first flash evaporator and the second flash evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020721920.3U CN212253252U (en) | 2020-05-06 | 2020-05-06 | Bidirectional space-variable spiral vertical flash evaporator and heat pump system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020721920.3U CN212253252U (en) | 2020-05-06 | 2020-05-06 | Bidirectional space-variable spiral vertical flash evaporator and heat pump system with same |
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| Publication Number | Publication Date |
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| CN212253252U true CN212253252U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020721920.3U Active CN212253252U (en) | 2020-05-06 | 2020-05-06 | Bidirectional space-variable spiral vertical flash evaporator and heat pump system with same |
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| Country | Link |
|---|---|
| CN (1) | CN212253252U (en) |
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- 2020-05-06 CN CN202020721920.3U patent/CN212253252U/en active Active
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