CN106705508A - Flash tank and refrigerating system - Google Patents
Flash tank and refrigerating system Download PDFInfo
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- CN106705508A CN106705508A CN201510478814.0A CN201510478814A CN106705508A CN 106705508 A CN106705508 A CN 106705508A CN 201510478814 A CN201510478814 A CN 201510478814A CN 106705508 A CN106705508 A CN 106705508A
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- flash tank
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- 239000003507 refrigerant Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims description 54
- 238000005057 refrigeration Methods 0.000 claims description 49
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 230000004308 accommodation Effects 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract 3
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a flash tank which comprises an inlet, a first outlet, a second outlet and a pre-expansion element. Fluid flows into the flash tank from the inlet. The first outlet is located in the top of the flash tank. The second outlet is located in the bottom of the flash tank. The pre-expansion element is integrated in the inlet of the flash tank and is used for pre-expanding fluid flowing into the inlet of the flash tank. In the flash tank, the pre-expansion element used for pre-expanding a refrigerant flowing into the inlet of the flash tank is integrated in the inlet of the flash tank, and therefore an independent throttling valve does not need to be arranged in a fluid inlet pipeline connected with the inlet of the flash tank and the throttling valve does not need to be independently controlled; and thus, the structure of a refrigerating system and control over the refrigerating system are simplified, and the cost is reduced. In addition, the invention further discloses the refrigerating system comprising the above flash tank.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a flash tank and a refrigeration system comprising the flash tank.
Background
In refrigeration systems, flash tanks are often introduced to increase cooling capacity and refrigeration efficiency. However, in existing refrigeration systems, the flash tank tends to be complex in construction and complex control logic and expensive hardware is often required to control the flash tank and system.
Disclosure of Invention
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
An object of the present invention is to provide a flash tank and a refrigeration system including the same, in which a pre-expansion element for pre-expanding refrigerant flowing into an inlet of the flash tank is integrated in the inlet of the flash tank, so that it is not necessary to provide a separate throttle valve in a liquid inlet line connected to the inlet of the flash tank and to separately control the throttle valve, thereby simplifying the structure and control of the refrigeration system and reducing the cost.
It is another object of the present invention to provide a flash tank and a refrigeration system including the same, in which an interior of the flash tank is partitioned into a liquid accommodating space for accommodating liquid refrigerant and a gas accommodating space for accommodating gaseous refrigerant, so that the liquid refrigerant and the gaseous refrigerant can be effectively prevented from being mixed with each other, and the separation of the liquid refrigerant and the gaseous refrigerant is promoted.
It is another object of the present invention to provide a flash tank and a refrigeration system including the same, wherein a central axis of an opening of an inlet pipe of the flash tank is inclined to an inner wall of the flash tank, so that refrigerant entering the flash tank through the inlet pipe generates a swirling vortex flow along the inner wall of the flash tank, further promoting separation of liquid refrigerant and gaseous refrigerant from each other.
The technical scheme of the invention can be realized by the following specific embodiments:
according to an aspect of the invention, there is provided a flash tank comprising: an inlet through which liquid flows into the flash tank; a first outlet at the top of the flash tank; a second outlet at the bottom of the flash tank; and a pre-expansion element integrated in the inlet of the flash tank for pre-expanding liquid flowing into the inlet of the flash tank.
According to an exemplary embodiment of the invention, the pre-expansion element is a fixed orifice or a throttle tube integrated at the inlet.
According to another exemplary embodiment of the present invention, the fixed orifice or throttle tube is designed such that: the refrigeration system comprising the flash tank has the optimal intermediate jet pressure in the jet state, wherein the optimal intermediate jet pressure means that the efficiency of the refrigeration system is highest when the refrigeration system operates under the jet pressure, and the ratio of the output refrigerating capacity or the heating capacity of the refrigeration system to the input power consumption of the refrigeration system is optimal.
According to another exemplary embodiment of the invention, the flash tank further comprises a horizontal separation plate disposed inside the flash tank above the inlet. The horizontal partition plate partitions an inner space of the flash tank into a first accommodation space located above the horizontal partition plate and a second accommodation space located below the horizontal partition plate, and includes at least one through hole on the horizontal partition plate to allow gas to enter the first accommodation space from the second accommodation space through the at least one through hole.
According to another exemplary embodiment of the present invention, a sight glass is provided on a side wall of the second accommodation space of the flash tank so as to observe the liquid refrigerant in the second accommodation space.
According to another exemplary embodiment of the present invention, the inlet of the flash tank comprises an inlet pipe protruding into the interior of the flash tank, the central axis of the opening of the inlet pipe being inclined to the inner wall of the flash tank.
According to another exemplary embodiment of the invention, the central axis of the opening of the inlet pipe makes an angle of more than 10 degrees and less than 60 degrees with the tangent of the inner wall of the flash tank.
According to another aspect of the present invention, a refrigeration system is provided that includes a condenser, an evaporator, an expansion valve, and a compressor. The refrigeration system also comprises the flash tank. Refrigerant output from the condenser enters the flash tank via an inlet of the flash tank, and the flash tank separates the refrigerant into gaseous refrigerant and liquid refrigerant. The gaseous refrigerant is delivered to the compressor via the first outlet of the flash tank. The liquid refrigerant is delivered to the evaporator after being delivered to a system expansion valve via a second outlet of the flash tank. The compressor compresses a refrigerant inputted from the evaporator and delivers the compressed refrigerant to the condenser.
According to an exemplary embodiment of the invention, the refrigeration system further comprises: an injection line between the first outlet of the flash tank and the compressor, an ejector disposed on the injection line, and a connecting line between the second outlet of the flash tank and the ejector; gaseous refrigerant output from the first outlet of the flash tank can be injected into the compressor via the ejector; a portion of the liquid refrigerant output from the second outlet of the flash tank can be directed to the ejector.
According to another exemplary embodiment of the present invention, the refrigeration system further comprises: and the electric control valve is arranged on the injection pipeline and is positioned between the ejector and the compressor, and when the compressor is closed, the electric control valve and the compressor are closed simultaneously so as to prevent refrigerant from migrating from the flash tank to the compressor through the injection pipeline after the compressor is stopped.
According to another exemplary embodiment of the present invention, the refrigeration system further comprises a control valve disposed on a connection line between the second outlet of the flash tank and the ejector; the control valve opens to allow liquid refrigerant output from the second outlet of the flash tank to be injected into the compressor via the ejector together with the gaseous refrigerant when the discharge temperature of the compressor is higher than a preset temperature, and closes when the discharge temperature of the compressor is lower than the preset temperature.
According to another exemplary embodiment of the present invention, gaseous refrigerant output from the first outlet of the flash tank is injected into the compressor; a portion of the liquid refrigerant directly output from the condenser is injected into the compressor.
According to another exemplary embodiment of the present invention, the refrigeration system further comprises: an electronically controlled valve disposed in an injection line between the first outlet of the flash tank and the compressor; when the compressor is off, this electronically controlled valve closes simultaneously with the compressor to prevent refrigerant from migrating from the flash tank to the compressor through the injection line after compressor shutdown.
According to another exemplary embodiment of the present invention, the refrigeration system further comprises: the connecting pipeline is arranged between the outlet of the condenser and the injection pipeline, the outlet of the condenser is communicated with the injection pipeline through the connecting pipeline, and the connecting pipeline is provided with a control valve; the control valve is opened to allow the liquid refrigerant directly output from the condenser to be injected into the compressor when a discharge temperature of the compressor is higher than a preset temperature, and is closed when the temperature of the compressor is lower than the preset temperature.
According to another exemplary embodiment of the present invention, the control valve is an electronic expansion valve, and the discharge temperature of the compressor is controlled by adjusting an opening degree of the electronic expansion valve.
According to another exemplary embodiment of the present invention, the control valve is a solenoid valve, and the discharge temperature of the compressor is controlled by adjusting a duty ratio of the solenoid valve.
According to another exemplary embodiment of the present invention, the refrigeration system is an air conditioning system or a heat pump system or a refrigeration system.
In the foregoing exemplary embodiments of the present invention, a separate throttle valve and a separate control of the throttle valve are not required in the liquid inlet line connected to the inlet of the flash tank by integrating a pre-expansion element for pre-expanding the refrigerant flowing into the inlet of the flash tank in the inlet of the flash tank, thereby simplifying the construction and control of the refrigeration system and reducing the cost.
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
Drawings
FIG. 1 shows a schematic diagram of a refrigeration system according to a first exemplary embodiment of the present invention;
FIG. 2 shows a plan view of a flash tank in the refrigeration system shown in FIG. 1;
FIG. 3a shows a cross-sectional view of the flash tank of FIG. 2 along section line A-A of FIG. 2;
FIG. 3B shows a cross-sectional view of the flash tank of FIG. 2 along section line B-B of FIG. 2; and
fig. 4 shows a schematic diagram of a refrigeration system according to a second exemplary embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
In the flash tank, a separate throttling valve may be provided in the liquid inlet line connected to the inlet of the flash tank and separately controlled to regulate the flow, velocity and pressure of the liquid refrigerant flowing into the flash tank. However, this results in a more complex construction and control of the refrigeration system, and also in increased costs.
Further, there is a flash tank in which an inner space is an integral accommodation space, which is not partitioned into a liquid accommodation space for accommodating liquid refrigerant and a gas accommodation space for accommodating gaseous refrigerant. Therefore, the liquid refrigerant and the gaseous refrigerant are easily mixed with each other, and the liquid refrigerant and the gaseous refrigerant are not easily separated from each other. Some flash tanks have a plurality of baffle plates or rotating plates to divide an internal space into a liquid accommodating space for accommodating liquid refrigerant and a gas accommodating space for accommodating gaseous refrigerant, and have a complicated structure, complicated process and manufacture, and high cost.
Moreover, the system using the flash tank to realize both gas injection and liquid injection often has very complicated control logic and special control boards, and is high in cost. Fig. 1 shows a schematic diagram of a refrigeration system according to a first exemplary embodiment of the present invention.
As shown in fig. 1, in the illustrated embodiment, the refrigeration system generally includes a flash tank 100, a condenser 200, an evaporator 300, and a compressor 400.
Fig. 2 shows a plan view of the flash tank 100 in the refrigeration system shown in fig. 1.
As shown in fig. 2, in the illustrated embodiment, the flash tank 100 generally includes an inlet 110 disposed on the body of the flash tank 100, a first outlet 121 disposed at the top of the body of the flash tank 100, and a second outlet 122 disposed at the bottom of the body of the flash tank 100.
As shown in fig. 1 and 2, in the illustrated embodiment, refrigerant output from the condenser 200 enters the flash tank 100 via the inlet 110 of the flash tank 100, and the refrigerant is separated into gaseous refrigerant and liquid refrigerant in the flash tank 100. Gaseous refrigerant is delivered to the compressor 400 via the first outlet 121 of the flash tank 100. The liquid refrigerant is delivered to the evaporator 300 via the second outlet 122 of the flash tank 100. The compressor 400 compresses the refrigerant input from the flash tank 100 and the evaporator 300 and delivers the compressed refrigerant to the condenser 200.
In the embodiment shown in fig. 2, a pre-expansion element (not shown) is integrated in the inlet 110 of the flash tank 100 for pre-expanding the liquid flowing into the inlet 110 of the flash tank 100.
In an exemplary embodiment of the invention, the pre-expansion element may be a fixed orifice or a restrictive tube.
In an exemplary embodiment of the invention, the aforementioned orifice or throttle tube may be designed according to the optimal intermediate discharge pressure of the flash tank 100. Further, the aforementioned throttle pipe may be a capillary tube.
In the previously described embodiments of the present invention, the flash tank incorporates a pre-expansion (orifice or plate) at the inlet, which in prior art refrigeration systems is separate and requires a complex set of control logic.
In the aforementioned embodiments of the invention, the system has an optimum intermediate jet pressure in the jet mode operation by designing the pre-expansion element (orifice plate or throttle plate). The optimal intermediate jet pressure refers to that the system operates under the jet pressure, the efficiency (COP/EER) of the system is highest, and the ratio of the output refrigerating capacity (or heating capacity) of the system to the input power consumption of the system is optimal. The optimal intermediate jet pressure of the system can be obtained by calculation, the rated operation conditions (evaporation temperature, condensation temperature, supercooling degree and superheat degree) of the system, the performance parameters of the compressor and the refrigerant used by the system are given, the optimal intermediate jet pressure of the system under the condition of using the compressor can be calculated, and the size of the throttle orifice plate or the throttle plate can be determined by the pressure value. The flash tank integrated with the fixed throttle orifice plate or throttle pipe is characterized in that the liquid level in the flash tank is optimal at 40% -60% of the height of the flash tank when the system operates under a rated working condition, and the system can operate safely and stably as long as the liquid level in the flash tank is not lower than 15% of the height of the tank body or higher than 85% of the height of the tank body when the system operates under different working conditions.
In the foregoing embodiment of the present invention, by integrating a pre-expansion element in the inlet 110 of the flash tank 100 for pre-expanding the refrigerant flowing into the inlet 110 of the flash tank 100, there is no need to provide a separate throttle valve in the liquid inlet line connected to the inlet of the flash tank 100 and to separately control the throttle valve, thereby simplifying the construction and control of the refrigeration system and reducing costs.
Fig. 3a shows a cross-sectional view of the flash tank 100 of fig. 2 along section line a-a of fig. 2. Fig. 3B shows a cross-sectional view of the flash tank 100 of fig. 2 along section line B-B of fig. 2.
As shown in fig. 2, 3a and 3b, in the illustrated embodiment, the flash tank 100 further comprises a horizontal dividing plate 103. The horizontal separation plate 103 is disposed inside the flash tank 100 above the inlet 110. The horizontal separation plate 103 divides the interior space of the flash tank 100 into a first receiving space 101 (for receiving gaseous refrigerant) located above the horizontal separation plate 103 and a second receiving space 102 (for receiving liquid refrigerant) located below the horizontal separation plate 103.
In one embodiment of the present invention, a sight glass may be provided on a sidewall of the second receiving space 102 of the flash tank 100 to facilitate viewing of the liquid refrigerant in the second receiving space 102.
In the foregoing embodiment of the invention, the interior of the flash tank is partitioned into the liquid accommodation space (the second accommodation space 102) for accommodating the liquid refrigerant and the gas accommodation space (the first accommodation space 101) for accommodating the gaseous refrigerant, so that the liquid refrigerant and the gaseous refrigerant can be effectively prevented from being mixed with each other, and the separation of the liquid refrigerant and the gaseous refrigerant from each other is promoted.
As clearly shown in fig. 3a, at least one through hole 103a is formed on the horizontal partition plate 103 to allow gas (gaseous refrigerant) to enter the first accommodation space 101 from the second accommodation space 102 via the at least one through hole 103 a.
As best shown in fig. 3b, in the illustrated embodiment, the inlet 110 of the flash tank 100 comprises an inlet pipe 111 projecting into the interior of the flash tank 100, the central axis X1 of the opening 111a of the inlet pipe 111 being inclined to the inner wall 100a of the flash tank 100.
In the foregoing embodiment of the invention, the central axis X1 of the opening 111a of the inlet pipe 111 of the flash tank 100 is inclined to the inner wall 100a of the flash tank 100. As such, the refrigerant entering the flash tank 100 via the inlet tube 111 creates a swirling vortex flow along the inner wall 100a of the flash tank 100, further promoting separation of liquid and gaseous refrigerant from one another.
In an exemplary embodiment of the invention, the central axis X1 of the opening 111a of the inlet pipe 111 may be at an angle greater than 10 degrees and less than 60 degrees from the tangent to the inner wall 100a of the flash tank 100.
With continued reference to fig. 1 and 2, in the illustrated embodiment, an ejector 500 is provided in the injection line 2 between the first outlet 121 of the flash tank 100 and the compressor 400; and the gaseous refrigerant output from the first outlet 121 of the flash tank 100 and a portion of the liquid refrigerant output from the second outlet 122 of the flash tank 100 are injected together into the compressor 400 via the ejector 500.
In an exemplary embodiment of the present invention, as shown in fig. 1 and 2, an electronic control valve 800 is further provided on the injection line 2, and the electronic control valve 800 is located between the ejector 500 and the compressor 400. When the compressor 400 is off, this electronically controlled valve 800 should be closed simultaneously with the compressor 400 to prevent refrigerant from migrating from the flash tank 100 to the compressor 400 via the injection line 2 after the compressor 400 is shut down.
As shown in fig. 1 and 2, in the illustrated embodiment, a control valve 600 is provided on the connecting line 4 between the second outlet 122 of the flash tank 100 and the ejector 500. When the discharge temperature of the compressor 400 is higher than the preset temperature, the control valve 600 is opened to allow the liquid refrigerant output from the second outlet 122 of the flash tank 100 to be injected into the compressor 400 via the ejector 500. When the discharge temperature of the compressor 400 is lower than a preset temperature, the control valve 600 is closed. Thus, the discharge temperature of the compressor 400 can be controlled to be equal to the preset temperature.
In an exemplary embodiment of the present invention, a temperature sensor 700 may be employed to detect a discharge temperature of the compressor 400 and control the aforementioned control valve 600 according to the detected temperature.
In an exemplary embodiment of the present invention, the aforementioned control valve 600 is an electronic expansion valve, and the discharge temperature of the compressor 400 is controlled by adjusting the opening degree of the electronic expansion valve.
In another exemplary embodiment of the present invention, the aforementioned control valve 600 is a solenoid valve, and the discharge temperature of the compressor 400 is controlled by adjusting a duty ratio of the solenoid valve.
Fig. 4 shows a schematic diagram of a refrigeration system according to a second exemplary embodiment of the present invention.
The refrigeration system shown in fig. 4 includes the flash tank 100 shown in fig. 2-3, as well as the condenser 200, evaporator 300, and compressor 400.
As shown in fig. 4 and 2, refrigerant output from the condenser 200 enters the flash tank 100 via the inlet 110 of the flash tank 100 and is separated into gaseous refrigerant and liquid refrigerant in the flash tank 100. Gaseous refrigerant is delivered to the compressor 400 via the first outlet 121 of the flash tank 100. The liquid refrigerant is delivered to the evaporator 300 via the second outlet 122 of the flash tank 100. The compressor 400 compresses the refrigerant input from the flash tank 100 and the evaporator 300 and delivers the compressed refrigerant to the condenser 200.
As shown in fig. 4 and 2, in the illustrated embodiment, the gaseous refrigerant output from the first outlet 121 of the flash tank 100 and a portion of the liquid refrigerant output directly from the condenser 200 are injected together into the compressor 400.
As shown in fig. 4 and 2, in the illustrated embodiment, an electronically controlled valve 800 is provided in the injection line 2 between the first outlet 121 of the flash tank 100 and the compressor 400. When the compressor 400 is off, this electronically controlled valve 800 should be closed simultaneously with the compressor 400 to prevent refrigerant from migrating from the flash tank 100 to the compressor 400 via the injection line 2 after the compressor 400 is shut down.
As shown in fig. 4 and 2, in the illustrated embodiment, the outlet of the condenser 200 is communicated with the injection line 2 via a connection line 4 ', and a control valve 600 is provided on the connection line 4'. When the discharge temperature of the compressor 400 is higher than a preset temperature, the control valve 600 is opened to allow the liquid refrigerant directly output from the condenser 200 to be injected into the compressor 400. When the temperature of the compressor 400 is lower than the preset temperature, the control valve 600 is closed. Thus, the discharge temperature of the compressor 400 can be controlled to be equal to the preset temperature.
In an exemplary embodiment of the present invention, as shown in fig. 4, a temperature sensor 700 may be employed to detect a discharge temperature of the compressor 400 and control the aforementioned control valve 600 according to the detected temperature.
In an exemplary embodiment of the present invention, the aforementioned control valve 600 is an electronic expansion valve, and the discharge temperature of the compressor 400 is controlled by adjusting the opening degree of the electronic expansion valve.
In another exemplary embodiment of the present invention, the aforementioned control valve 600 is a solenoid valve, and the discharge temperature of the compressor 400 is controlled by adjusting a duty ratio of the solenoid valve.
In an exemplary embodiment of the invention, the refrigeration system shown in fig. 1 and 4 may be an air conditioning heat pump and refrigeration system.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention.
Claims (16)
1. A flash tank, comprising:
an inlet (110) through which liquid flows into the flash tank (100);
a first outlet (121) located at the top of the flash tank (100);
a second outlet (122) located at the bottom of the flash tank (100); and
a pre-expansion element integrated in the inlet (110) of the flash tank (100) for pre-expanding liquid flowing into the inlet (110) of the flash tank (100).
2. The flash tank of claim 1, wherein: the pre-expansion element is a fixed orifice or throttle tube integrated at the inlet.
3. The flash tank of claim 2, wherein:
the fixed orifice or throttle tube is designed such that: the refrigeration system comprising the flash tank has the optimal intermediate jet pressure in the jet state, wherein the optimal intermediate jet pressure means that the efficiency of the refrigeration system is highest when the refrigeration system operates under the jet pressure, and the ratio of the output refrigerating capacity or the heating capacity of the refrigeration system to the input power consumption of the refrigeration system is optimal.
4. The flash tank of claim 1, wherein: further comprising:
a horizontal separation plate (103), said horizontal separation plate (103) being disposed inside said flash tank (100) and above said inlet (110);
wherein the horizontal separation plate (103) divides the internal space of the flash tank (100) into a first accommodation space (101) above the horizontal separation plate (103) and a second accommodation space (102) below the horizontal separation plate (103);
wherein at least one through hole (103a) is included on the horizontal partition plate (103) to allow gas to enter the first accommodation space (101) from the second accommodation space (102) through the at least one through hole (103 a).
5. The flash tank of claim 4, wherein:
a liquid sight glass is provided on a side wall of a second receiving space (102) of the flash tank (100) for viewing liquid refrigerant in the second receiving space (102).
6. The flash tank of any of claims 1 to 5, wherein:
the inlet (110) of the flash tank (100) comprises an inlet pipe (111) protruding into the interior of the flash tank (100), the central axis (X1) of the opening (111a) of the inlet pipe (111) being inclined to the inner wall (100a) of the flash tank (100).
7. The flash tank of claim 6, wherein:
the central axis (X1) of the opening (111a) of the inlet pipe (111) makes an angle of more than 10 degrees and less than 60 degrees with the tangent of the inner wall (100a) of the flash tank (100).
8. A refrigeration system comprising a condenser (200), an evaporator (300) and a compressor (400), characterized in that:
the refrigeration system further comprising a flash tank (100) according to any of the preceding claims 1-7,
wherein refrigerant output from the condenser (200) enters the flash tank (100) via an inlet (110) of the flash tank (100), and the flash tank (100) separates the refrigerant into gaseous refrigerant and liquid refrigerant;
wherein the gaseous refrigerant is delivered into the compressor (400) via a first outlet (121) of the flash tank (100);
wherein the liquid refrigerant is delivered into the evaporator (300) via a second outlet (122) of the flash tank (100);
wherein the compressor (400) compresses the refrigerant inputted from the evaporator (300) and delivers the compressed refrigerant to the condenser (200).
9. The refrigerant system as set forth in claim 8, further including:
an injection line (2) between a first outlet (121) of the flash tank (100) and the compressor (400),
an ejector (500) arranged on the injection line (2), and
a connecting line (4) between the second outlet (122) of the flash tank (100) and the ejector (500);
wherein gaseous refrigerant output from the first outlet (121) of the flash tank (100) is injectable into the compressor (400) via the ejector (500);
a portion of the liquid refrigerant output from the second outlet (122) of the flash tank (100) can be directed to the ejector (500).
10. The refrigerant system as set forth in claim 9, further including:
an electronic control valve (800) disposed on the injection line (2), the electronic control valve (800) being located between the ejector (500) and the compressor (400);
wherein the electronically controlled valve (800) is closed simultaneously with the compressor (400) when the compressor (400) is off to prevent refrigerant from migrating from the flash tank (100) to the compressor (400) via the injection line (2) after the compressor (400) is shut down.
11. The refrigerant system as set forth in claim 10, further including:
a control valve (600) arranged on the connecting line (4) between the second outlet (122) of the flash tank (100) and the ejector (500);
wherein when the discharge temperature of the compressor (400) is higher than a preset temperature, the control valve (600) is opened to allow the liquid refrigerant output from the second outlet (122) of the flash tank (100) to be injected into the compressor (400) together with the gaseous refrigerant via the ejector (500); when the discharge temperature of the compressor (400) is lower than a preset temperature, the control valve (600) is closed.
12. The refrigeration system of claim 8, wherein:
gaseous refrigerant output from the first outlet (121) of the flash tank (100) is injected into the compressor (400);
a portion of the liquid refrigerant directly output from the condenser (200) is injected into the compressor (400).
13. The refrigerant system as set forth in claim 12, further including:
an electronically controlled valve (800) disposed in an injection line (2) between the first outlet (121) of the flash tank (100) and the compressor (400);
wherein the electronically controlled valve (800) is closed simultaneously with the compressor (400) when the compressor (400) is off to prevent refrigerant from migrating from the flash tank (100) into the compressor (400) via the injection line (2) after the compressor (400) is shut down.
14. The refrigeration system of claim 12 or 13, further comprising:
a connection line (4') arranged between the outlet of the condenser (200) and the injection line (2); wherein the outlet of the condenser (200) communicates with the injection line (2) via the connecting line (4 '), a control valve (600) being provided on the connecting line (4'); the control valve (600) is opened to allow the liquid refrigerant directly outputted from the condenser (200) to be injected into the compressor (400) when the discharge temperature of the compressor (400) is higher than a preset temperature, and the control valve (600) is closed when the temperature of the compressor (400) is lower than the preset temperature.
15. The refrigeration system according to claim 11 or 14, wherein:
the control valve (600) is an electronic expansion valve, and the exhaust temperature of the compressor (400) is controlled by adjusting the opening degree of the electronic expansion valve; or,
the control valve (600) is a solenoid valve, and the discharge temperature of the compressor (400) is controlled by adjusting the duty ratio of the solenoid valve.
16. The refrigeration system of claim 8, wherein: the refrigerating system is an air conditioning system or a heat pump system or a refrigerating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478814.0A CN106705508A (en) | 2015-08-07 | 2015-08-07 | Flash tank and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478814.0A CN106705508A (en) | 2015-08-07 | 2015-08-07 | Flash tank and refrigerating system |
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| CN106705508A true CN106705508A (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510478814.0A Pending CN106705508A (en) | 2015-08-07 | 2015-08-07 | Flash tank and refrigerating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3517859A1 (en) * | 2018-01-24 | 2019-07-31 | Panasonic Intellectual Property Management Co., Ltd. | Refrigeration cycle apparatus |
| CN112339523A (en) * | 2019-08-07 | 2021-02-09 | 现代自动车株式会社 | Heat pump system for vehicle |
| CN114846286A (en) * | 2019-12-27 | 2022-08-02 | Cpm控股有限公司 | Mixed refrigerant preparation device and method, mixed refrigerant container and use, mixed refrigerant container for mixing gas and liquid and use |
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| CN115025509B (en) * | 2022-04-29 | 2023-04-25 | 科希曼电器有限公司 | Flash tank system of steam heat pump machine |
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