CN112066458A - Air conditioning unit adopting throttle valve and control method thereof - Google Patents
Air conditioning unit adopting throttle valve and control method thereof Download PDFInfo
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- CN112066458A CN112066458A CN202010930262.3A CN202010930262A CN112066458A CN 112066458 A CN112066458 A CN 112066458A CN 202010930262 A CN202010930262 A CN 202010930262A CN 112066458 A CN112066458 A CN 112066458A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims abstract description 113
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims description 14
- 238000005485 electric heating Methods 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 4
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- 230000001603 reducing effect Effects 0.000 description 6
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/028—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by air supply means, e.g. fan casings, internal dampers or ducts
- F24F1/0284—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by air supply means, e.g. fan casings, internal dampers or ducts with horizontally arranged fan axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
- F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/0373—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heating arrangements
- F24F1/0375—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heating arrangements with additional radiant heat-discharging elements, e.g. electric heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning unit adopting a throttle valve and a control method thereof, wherein the air conditioning unit comprises: the compressor, the condenser, the throttle valve and the evaporator are connected in sequence; wherein, the outlet of the evaporator is also connected with the first connecting point through a one-way valve; wherein the first connection point is located on a pipeline between the compressor and the condenser; the throttle valve comprises a refrigerant inlet, a refrigerant outlet and an air taking pipe, the refrigerant inlet is connected with an outlet of the condenser, the refrigerant outlet is connected with an inlet of the evaporator, the air taking pipe is connected with a first connecting point and used for communicating the condenser and the evaporator after the compressor is started, the air conditioner is controlled to enter a compressor refrigeration mode, the one-way valve is conducted after the compressor is stopped, the condenser and the evaporator are communicated, and the air conditioning unit is controlled to enter a heat pipe mode. The invention solves the problem of excessive control valves of the air conditioning unit with the gravity heat pipe function in the prior art, simplifies the system design and reduces the production design difficulty and cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit adopting a throttle valve and a control method thereof.
Background
Integral air conditioning equipment, such as wall-mounted integral cabinets and container floor type cabinet-mounted air conditioners, are frequently used in specific application occasions, such as outdoor cabinets, outdoor base stations, container data centers and the like. With the great application of 4G and the gradual popularization of 5G, the heat productivity of various data processing devices is larger and larger, and the requirements on the cooling capacity and the energy conservation of air conditioning equipment are higher and higher.
One benefit of the unitary air conditioning apparatus is that gravity assisted heat pipes can be conveniently located. When the gravity assisted heat pipe is combined with a heat pump, a mode of parallel design of a throttling element and an electromagnetic valve is generally adopted. When the heat pump operates, the electromagnetic valve is closed, and the refrigerant performs pressure reduction operation through the throttling element; when the gravity heat pipe operates, the electromagnetic valve is opened, and the refrigerant mainly passes through the electromagnetic valve with low resistance, so that the gravity action is prevented from being consumed by the large resistance of the throttling element.
Aiming at the problem that the control valve of the air conditioning unit with the gravity heat pipe function in the related art is excessive, an effective solution is not provided at present.
Disclosure of Invention
The invention provides an air conditioning unit adopting a throttle valve and a control method thereof, which at least solve the problem that the control valve of the air conditioning unit with the gravity heat pipe function in the prior art is too many.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: the compressor, the condenser, the throttle valve and the evaporator are connected in sequence; wherein, the outlet of the evaporator is also connected with the first connecting point through a one-way valve; the first connecting point is positioned on a pipeline between the compressor and the condenser; the throttle valve comprises a refrigerant inlet, a refrigerant outlet and a gas taking pipe, the refrigerant inlet is connected with the outlet of the condenser, the refrigerant outlet is connected with the inlet of the evaporator, and the gas taking pipe is connected with the first connecting point; the throttle valve is used for communicating the condenser and the evaporator after the compressor is started to control the air conditioner to enter a compressor refrigeration mode, and the check valve is communicated to communicate the condenser and the evaporator after the compressor is stopped to control the air conditioning unit to enter a heat pipe mode.
Further, still include: and the U-shaped pipe is positioned between the refrigerant inlet and the outlet of the condenser.
Further, the air conditioning unit is an integral air conditioning unit, including: a partition plate dividing the air conditioner unit into a first area and a second area; wherein the compressor and the condenser are located in the first zone, the evaporator is located in the second zone, and the throttle valve is located in the first zone or the second zone.
Furthermore, a pipeline through hole is formed in the partition plate and used for connecting the pipeline in the first area with the pipeline in the second area through the pipeline through hole; wherein the pipe passage hole is further sealed by a sealing material after passing through the pipe in the first region.
Further, still include: and the electric heating device is positioned in the second area and is positioned above the evaporator.
Further, the compressor is located below the condenser, and the evaporator is located within a preset distance below the condenser.
Further, the condenser and the evaporator are arranged obliquely, the inlet of the condensed gas is higher than the outlet of the condenser, and the outlet of the evaporator is higher than the inlet of the evaporator.
Further, the left side of the condenser is fixed on the left side wall of the first area, and the right side of the condenser is fixed on the right side wall of the first area; the left side of the evaporator is secured to the left side wall of the second zone and the right side of the evaporator is secured to the right side wall of the second zone.
Further, still include: the first fan is positioned in the first area; the second fan is positioned in the second area; wherein, first fan and second fan adopt following arbitrary business turn over wind mode: side air inlet and side air outlet, side air inlet and upper air outlet, side air inlet and bottom air outlet, bottom air inlet and side air outlet, and upper air inlet and side air outlet; wherein, the air circulation of any air inlet and outlet mode passes through the condenser or the evaporator.
Further, the throttle valve includes: the valve body is provided with a cavity, a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are communicated with the cavity; a spool movably disposed within the valve body, the spool having a throttling passage, the spool having a throttling position and a normal flow position; at the throttling position, the valve core is positioned at the refrigerant inlet position, the inlet of the throttling channel is communicated with the refrigerant inlet, and the outlet of the throttling channel is communicated with the refrigerant outlet; in the normal circulation position, the valve core avoids the refrigerant inlet and the refrigerant outlet, the refrigerant inlet is directly communicated with the refrigerant outlet through the cavity, and the valve core is switched between the throttling position and the normal position through movement.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit described above, including: after monitoring a starting signal, controlling a compressor to start; detecting whether a heat pipe mode is triggered or not after the compressor is started; if yes, the compressor is controlled to be closed, the air conditioning unit enters a heat pipe mode, and heat exchange is carried out through the heat pipe mode.
Further, after controlling the compressor to be started, the method further comprises: and after the first preset time, controlling the second fan to be started.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the invention, a dual-mode adjustable throttling valve is adopted to replace a throttling element and an electromagnetic valve which are connected in parallel, the switching of the working modes of the adjustable throttling valve can be realized only by the exhaust pressure of a compressor without power supply control while valve parts are reduced, thereby realizing the automatic switching of the working modes of compression refrigeration and gravity assisted heat pipes without the electromagnetic valve consuming electric energy. The air conditioning unit can reduce the use of electromagnetic valves, is simple to control, can simplify the system design, reduces the design difficulty of the controller, is convenient to produce, has lower cost, and effectively solves the problem of too many control valves of the air conditioning unit with the gravity heat pipe function in the prior art.
Drawings
Fig. 1 is a schematic view of an alternative configuration of an air conditioning assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of an alternative construction of a throttle valve according to an embodiment of the present invention; and
fig. 3 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention.
Description of reference numerals:
1. a compressor; 2. a condenser; 3. a throttle valve; 4. an evaporator; 5. a one-way valve; 6. a U-shaped pipe; 7. a partition plate; 8. an electric heating device; 9. a first fan; 10. a second fan; 11. a refrigerant inlet; 12. a refrigerant outlet; 13. taking an air pipe; 14. a communicating chamber; 15. an air pressure chamber; 16. a restoring elastic member; 20. a valve core; 21. a throttling channel; 30. a valve body.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural schematic diagram of the unit, as shown in fig. 1, the unit includes:
the system comprises a compressor 1, a condenser 2, a throttle valve 3 and an evaporator 4 which are connected in sequence; wherein,
the outlet of the evaporator 4 is also connected with a first connecting point on a pipeline between the compressor 1 and the condenser 2 through a one-way valve 5;
the throttle valve 3 comprises a refrigerant inlet 11, a refrigerant outlet 12 and an air taking pipe 13, the refrigerant inlet 11 is connected with an outlet of the condenser 2, the refrigerant outlet 12 is connected with an inlet of the evaporator 4, the air taking pipe 13 is connected with a first connecting point and used for communicating the condenser 2 with the evaporator 4 after the compressor 1 is started, the air conditioner is controlled to enter a refrigeration mode of the compressor 1, the one-way valve 5 is communicated after the compressor 1 is stopped, the condenser 2 and the evaporator 4 are communicated, and the air conditioning unit is controlled to enter a heat pipe mode. The one-way valve is conducted because positive pressure difference exists, the pressure of the refrigerating system is gradually balanced after the compressor is stopped, the pressure at the point A can be gradually reduced, the pressure unloading is conducted to a low-resistance flow channel of the throttling valve 5, and the one-way valve 5 is conducted.
In the above embodiment, a dual-mode adjustable throttle valve is adopted to replace a throttle element and an electromagnetic valve which are connected in parallel, so that the switching of the working modes of the adjustable throttle valve can be realized only by the exhaust pressure of a compressor without power supply control while reducing valve components, thereby realizing the automatic switching of the working modes of compression refrigeration and gravity assisted heat pipes without using an electromagnetic valve which consumes electric energy. The air conditioning unit can reduce the use of electromagnetic valves, is simple to control, can simplify the system design, reduces the design difficulty of the controller, is convenient to produce, has lower cost, and effectively solves the problem of too many control valves of the air conditioning unit with the gravity heat pipe function in the prior art.
As shown in fig. 1, the exhaust port of the compressor 1 is connected with the high inlet B of the condenser 2, the low outlet C of the condenser 2 is connected with a U-shaped pipe 6, the outlet of the U-shaped pipe 6 is connected with the horizontal pipe of the throttle valve 3, the horizontal connecting pipe at the position passes through a partition 7 to be perforated, and the outlet of the throttle valve 3 is connected with the lowest inlet D of the evaporator 4; the outlet E at the high of the evaporator 4 is connected to the suction port G of the compressor 1. A three-way pipeline piece F is connected between EG pipelines, a pipeline is led out from the three-way pipeline piece F and connected with an inlet of a one-way valve 5, an outlet of the one-way valve 5 is connected to a four-way pipeline piece A, the four-way pipeline piece A is arranged between an exhaust port of a compressor 1 and a high-position inlet B of a condenser 2 corresponding to a first connecting point, and a gas taking pipe 13 of a throttle valve 3 is connected to the four-way pipeline piece A.
As shown in fig. 2, fig. 2 shows a schematic view of the structure of the throttle valve 3. The throttle valve 3 comprises a throttle valve and a valve core 20, wherein the valve body 30 is provided with a cavity, a refrigerant inlet 11 and a refrigerant outlet 12, and the refrigerant inlet 11 and the refrigerant outlet 12 are both communicated with the cavity; the valve core 20 is movably arranged in the valve body 30, the valve core 20 is provided with a throttling channel 21, and the valve core 20 is provided with a throttling position and a normal flowing position; in the throttling position, the valve core 20 is positioned at the position of the refrigerant inlet 11, the inlet of the throttling channel 21 is communicated with the refrigerant inlet 11, and the outlet of the throttling channel 21 is communicated with the refrigerant outlet 12; in the normal circulation position, the valve core 20 avoids the refrigerant inlet 11 and the refrigerant outlet 12, the refrigerant inlet 11 is directly communicated with the refrigerant outlet 12 through the cavity, and the valve core 20 is switched between the throttling position and the normal position through movement.
According to the throttle valve, the throttle channel 21 is arranged on the valve core 20, the throttle valve can realize throttling or ultra-low resistance flow through the movement of the valve core 20, when the valve core 20 is at a throttling position, the valve core 20 is positioned at a refrigerant inlet 11, an inlet of the throttle channel 21 is communicated with the refrigerant inlet 11, and an outlet of the throttle channel 21 is communicated with the refrigerant outlet 12, so that the throttle valve realizes throttling; when the valve core 20 is located at the normal circulation position, the valve core 20 avoids the refrigerant inlet 11 and the refrigerant outlet 12, and the refrigerant inlet 11 is directly communicated with the refrigerant outlet 12 through the cavity, so that ultra-low resistance flow is realized, parallel use of an electronic expansion valve and an electromagnetic valve can be avoided, the pipeline structure is simplified, and the reliability is improved.
The valve core 20 divides the cavity into a pressure chamber 15 and a communication chamber 14, the pressure chamber 15 is communicated with an air source, and the communication chamber 14 is communicated with the refrigerant outlet 12; there is a pressure difference between the pneumatic chamber 15 and the communication chamber 14, and the valve spool 20 is moved by the pressure difference between the pneumatic chamber 15 and the communication chamber 14. The throttle valve of the invention adopts the valve core 20 to divide the cavity into the air pressure chamber 15 and the communication chamber 14, and when in use, pressure difference is formed between the air pressure chamber 15 and the communication chamber 14, thereby driving the valve core 20 to displace to the throttle position.
In the above embodiment, in the normal flow position, the refrigerant inlet 11 is directly communicated with the communication chamber 14. The throttle valve of the invention directly communicates the refrigerant inlet 11 with the communicating chamber 14, thereby directly discharging the refrigerant from the refrigerant outlet 12 through the communicating chamber 14 and realizing low resistance circulation.
The throttle valve further comprises a resetting elastic piece 16, the resetting elastic piece 16 is elastically arranged in the air pressure chamber 15, one end of the resetting elastic piece 16 is fixedly connected with the inner wall of the valve body 30, the other end of the resetting elastic piece 16 is connected to the valve core 20, and the resetting elastic piece 16 is used for resetting the valve core 20 from the throttling position to the normal circulation position.
According to the throttling valve, the throttling channel is arranged on the valve core, the throttling valve can realize throttling or ultra-low resistance flow through the movement of the valve core, when the valve core is at a throttling position, the valve core is positioned at a refrigerant inlet position, an inlet of the throttling channel is communicated with the refrigerant inlet, and an outlet of the throttling channel is communicated with a refrigerant outlet, so that the throttling function of the throttling valve is realized; when the valve core is located at a normal circulation position, the valve core avoids the refrigerant inlet and the refrigerant outlet, and the refrigerant inlet is directly communicated with the refrigerant outlet through the cavity, so that ultralow-resistance flow is realized, the electronic expansion valve and the electromagnetic valve can be prevented from being used in parallel, the pipeline structure is simplified, and the reliability is improved.
After the compressor is started, part of high-pressure exhaust gas is led to a pneumatic chamber of the throttle valve 3 to drive a valve core to move downwards, the throttle valve 3 realizes the throttling and pressure reducing effects, the valve core moves downwards to be limited and fixed, the volume of the pneumatic chamber is kept unchanged, theoretically, only a small amount of high-pressure refrigerant gas leaks from a gap between the valve core and a valve body and is reduced in pressure to an outlet pipe, and the operation of a refrigeration system is not influenced. After the throttle valve 3 is in place, a condensing fan (corresponding to a first fan) is opened, the refrigerating system operates, most of high-temperature and high-pressure refrigerant enters the condenser 2 from the point B to be cooled and condensed into liquid, and liquid seal is formed on the U-shaped pipe 6. The refrigerant liquid is throttled and decompressed from a throttling short pipe of the throttle valve 3 into two-phase low-temperature low-pressure refrigerant, the two-phase low-pressure refrigerant enters a low inlet D of the evaporator 4, the low-temperature low-pressure refrigerant absorbs heat and evaporates into low-pressure gas, and then the low-temperature low-pressure refrigerant flows into an air suction port G of the compressor 1 from an outlet E to form a complete refrigeration cycle.
After the compressor 1 is stopped, the residual high-pressure refrigerant continues to enter the evaporator 4 from the throttling short pipe, the high-pressure gas in the air pressure chamber of the throttling valve 3 is slowly reduced in pressure, the valve core in the throttling valve 3 gradually rises under the action of the reset elastic part until the middle end face of the valve core in the throttling valve 3 completely leaves the range of the refrigerant inlet 11 of the throttling valve 3, and at the moment, the throttling valve 3 is completely switched to the ultra-low resistance valve circulation mode. The refrigerant in the evaporator 4 continues to evaporate under the heating of the external air and flows out from the outlet E, the refrigerant vapor breaks through the starting pressure of the check valve 5 and bypasses the compressor 1, the refrigerant vapor returns to the high-position inlet B of the condenser 2 after passing through the four-way pipeline piece A, the refrigerant vapor entering the condenser 2 is liquefied into liquid under the cooling of the external cold air and flows downwards under the action of gravity, the refrigerant vapor flows out from the outlet C and enters the U-shaped pipe 6 to form a liquid seal, then the refrigerant vapor enters from the refrigerant inlet 11 of the throttle valve 3 and flows out after overcoming the small flow resistance, and then the refrigerant vapor enters the inlet D at the lower part of the evaporator 4 again to form a complete gravity heat pipe.
A U-shaped pipe 6 is also arranged between the throttle valve 3 and the condenser 2 and is positioned between the refrigerant inlet 11 and the outlet of the condenser 2. The outlet pipeline piece of the condenser 2 adopts a U-shaped pipe 6 liquid seal design structure, so that uncooled refrigerant steam in the condenser 2 at the upper part can be prevented from directly returning to the evaporator 4 at the lower part when the gravity heat pipe operates, and air lock is prevented.
Based on the throttle valve 3, can replace throttle element and valve connected in parallel, the air conditioning unit that adopts throttle valve 3 in this invention takes up space littleer, and preferably, the air conditioning unit is designed as integral air conditioning unit, and includes: a partition 7 dividing the air conditioner unit into a first area and a second area; wherein the compressor 1 and the condenser 2 are located in a first area, the evaporator 4 is located in a second area, and the throttle valve 3 is located in the first area or the second area.
As shown in FIG. 1, a partition 7 is arranged in the integral air conditioning unit to divide the air conditioning unit into a left area and a right area. Separation into upper and lower regions may also be achieved. The left side is a throttling decompression and evaporation refrigeration area, and the right side is a condensation heat release and vapor compression area. It is also possible, among other things, to arrange the throttle valve 3, which throttles the pressure drop, in the right-hand region, and this arrangement is more favorable for the production, testing and maintenance of the air conditioning unit.
The partition plate 7 is provided with a pipeline through hole for connecting the pipeline of the first area with the pipeline of the second area through the pipeline through hole; wherein the pipe passage hole is further sealed by a sealing material after passing through the pipe in the first region. The two areas are connected with each other through pipeline parts, and after the necessary connecting pipelines pass through the through holes on the partition plates 7, the through holes are sealed by materials such as hot melt adhesive or sealing mastic, so that the hot and cold air flows in the two areas are prevented from mixing with each other through the through holes. It should be noted that, when the pipe member needs to pass through the partition 7, the pipe member preferably passes through the same through hole (the schematic view is only used for understanding, and is not shown as entering and exiting through the same through hole). The pipelines penetrating through the through holes of the partition plate 7 are respectively wrapped with independent heat insulation materials, and finally the through holes are effectively sealed by sealing materials, so that the cold air and the hot air in the left area and the right area are prevented from being mixed and communicated with each other.
Each area is provided with an independent fan (a first fan 9 or a second fan 10), and the fan sucks external air into the area, passes through a heat exchanger (a condenser 2 or an evaporator 4) in the area to realize high-efficiency heat exchange, and then is discharged from the other side in the area. As shown in fig. 2, each region is a side-in side-out type, which is only used for understanding, and may be actually arranged in a side-in top-out type, a side-in bottom-in side-out type, a top-in side-out type, and the like according to needs.
In order to better utilize the working characteristics of the gravity assisted heat pipe, the evaporator 4 is obliquely arranged at the lower part of the left side area and is fixedly connected with the left side plate and the partition plate 7 respectively; in order to prevent the condensation water produced by the evaporator 4 from dripping onto the auxiliary electric heating with safety problems, the auxiliary electric heating is arranged in the upper region of the evaporator 4.
In the right side region, the compressor 1 is arranged at the bottom, the inclined condenser 2 is arranged at the upper part, the condenser 2 is higher than the evaporator 4 by a certain distance to ensure the normal work of the gravity assisted heat pipe, and the condenser 2 is fixedly connected with a right side plate and a partition plate 7 respectively.
Example 2
In a preferred embodiment 2 of the present invention, there is provided an air conditioning unit control method applied to the air conditioning unit in the above embodiment 1. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S306:
s302: after monitoring a starting signal, controlling a compressor to start;
s304: detecting whether a heat pipe mode is triggered or not after the compressor is started;
s306: if yes, the compressor is controlled to be closed, the air conditioning unit enters a heat pipe mode, and heat exchange is carried out through the heat pipe mode.
In the above embodiment, a dual-mode adjustable throttle valve is adopted to replace a throttle element and an electromagnetic valve which are connected in parallel, so that the switching of the working modes of the adjustable throttle valve can be realized only by the exhaust pressure of a compressor without power supply control while reducing valve components, thereby realizing the automatic switching of the working modes of compression refrigeration and gravity assisted heat pipes without using an electromagnetic valve which consumes electric energy. The air conditioning unit can reduce the use of electromagnetic valves, is simple to control, can simplify the system design, reduces the design difficulty of the controller, is convenient to produce, has lower cost, and effectively solves the problem of too many control valves of the air conditioning unit with the gravity heat pipe function in the prior art.
Wherein, after controlling compressor 1 to open, still include: after the first preset time, the second fan 10 is controlled to be turned on.
Based on the air conditioning unit in embodiment 1, the operating principle is described as follows:
1) refrigeration mode
The compressor 1 is started, and the condensing fan (corresponding to the first fan 9) is delayed to be opened, mainly in order to ensure the flow resistance of high-temperature and high-pressure refrigerant gas in the condenser 2 before the throttle valve 3 acts in place, and establish the pressure difference of a refrigeration system, so that the valve core 20 in the throttle valve 3 can rapidly descend to reach the throttling and pressure reducing position. After the compressor is started, part of high-pressure exhaust gas is led to a pneumatic chamber of the throttle valve 3 to drive a valve core to move downwards, the throttle valve 3 realizes the throttling and pressure reducing effects, the valve core moves downwards to be limited and fixed, the volume of the pneumatic chamber is kept unchanged, theoretically, only a small amount of high-pressure refrigerant gas leaks from a gap between the valve core and a valve body and is reduced in pressure to an outlet pipe, and the operation of a refrigeration system is not influenced. After the throttle valve 3 acts in place, the condensing fan is opened, the refrigerating system operates, most of high-temperature and high-pressure refrigerant enters the condenser 2 from the point B to be radiated and condensed into liquid, and liquid seal is formed on the U-shaped pipe 6. The refrigerant liquid is throttled and decompressed from a throttling short pipe of the throttle valve 3 into two-phase low-temperature low-pressure refrigerant, the two-phase low-pressure refrigerant enters a low inlet D of the evaporator 4, the low-temperature low-pressure refrigerant absorbs heat and evaporates into low-pressure gas, and then the low-temperature low-pressure refrigerant flows into an air suction port G of the compressor 1 from an outlet E to form a complete refrigeration cycle.
Since the flow velocity of the refrigerant in the gas taking pipe is approximately 0, the flow resistance is ignored, and the pressure of the rest most of high-pressure refrigerant gas after flowing through the condenser 2 and reaching the throttle valve 3 has great loss, the pressure in the air pressure chamber of the throttle valve 3 is greater than the pressure of the inlet pipe of the throttle valve 3, and the valve core can be pushed to move downwards.
2) Heat pipe pattern
The heat pipe mode in the invention is a gravity heat pipe, and the condensed working medium flows back to the evaporation section under the action of gravity. Specifically, after the compressor 1 is stopped, the remaining high-pressure refrigerant continues to pass through the throttle short pipe and enters the evaporator 4, the high-pressure gas in the air pressure chamber of the throttle valve 3 is slowly reduced in pressure, the valve core in the throttle valve 3 gradually rises under the action of the reset elastic element until the middle end face of the valve core in the throttle valve 3 completely leaves the range of the refrigerant inlet 11 of the throttle valve 3, and at this time, the throttle valve 3 is completely switched to the ultra-low resistance valve circulation mode. The refrigerant in the evaporator 4 continues to evaporate under the heating of the external air and flows out from the outlet E, the refrigerant vapor breaks through the starting pressure of the check valve 5 and bypasses the compressor 1, the refrigerant vapor returns to the high-position inlet B of the condenser 2 after passing through the four-way pipeline piece A, the refrigerant vapor entering the condenser 2 is liquefied into liquid under the cooling of the external cold air and flows downwards under the action of gravity, the refrigerant vapor flows out from the outlet C and enters the U-shaped pipe 6 to form a liquid seal, then the refrigerant vapor enters from the refrigerant inlet 11 of the throttle valve 3 and flows out after overcoming the small flow resistance, and then the refrigerant vapor enters the inlet D at the lower part of the evaporator 4 again to form a complete gravity heat pipe.
Example 3
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, a dual-mode adjustable throttle valve is adopted to replace a throttle element and an electromagnetic valve which are connected in parallel, so that the switching of the working modes of the adjustable throttle valve can be realized only by the exhaust pressure of a compressor without power supply control while reducing valve components, thereby realizing the automatic switching of the working modes of compression refrigeration and gravity assisted heat pipes without using an electromagnetic valve which consumes electric energy. The air conditioning unit can reduce the use of electromagnetic valves, is simple to control, can simplify the system design, reduces the design difficulty of the controller, is convenient to produce, has lower cost, and effectively solves the problem of too many control valves of the air conditioning unit with the gravity heat pipe function in the prior art.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (13)
1. An air conditioning assembly, comprising:
the system comprises a compressor (1), a condenser (2), a throttle valve (3) and an evaporator (4) which are connected in sequence; wherein,
the outlet of the evaporator (4) is also connected with a first connecting point through a one-way valve (5); wherein the first connection point is located on a line between the compressor (1) and the condenser (2);
the throttle valve (3) comprises a refrigerant inlet (11), a refrigerant outlet (12) and a gas taking pipe (13), the refrigerant inlet (11) is connected with an outlet of the condenser (2), the refrigerant outlet (12) is connected with an inlet of the evaporator (4), and the gas taking pipe (13) is connected with the first connecting point;
the throttling valve (3) is used for communicating the condenser (2) with the evaporator (4) after the compressor (1) is started, controlling the air conditioner to enter a refrigeration mode of the compressor (1), and after the compressor (1) is stopped, the one-way valve (5) is communicated with the condenser (2) and the evaporator (4) to control the air conditioning unit to enter a heat pipe mode.
2. The assembly according to claim 1, further comprising:
and the U-shaped pipe (6) is positioned between the refrigerant inlet (11) and the outlet of the condenser (2).
3. The assembly of claim 1, wherein the air conditioning assembly is a unitary air conditioning assembly comprising:
a partition (7) dividing the air conditioning unit into a first area and a second area; wherein the compressor (1) and the condenser (2) are located in the first region, the evaporator (4) is located in the second region, and the throttle valve (3) is located in the first region or the second region.
4. The assembly according to claim 1,
the partition plate (7) is provided with a pipeline through hole for connecting the pipeline of the first area with the pipeline of the second area through the pipeline through hole; wherein the pipeline through hole is further sealed by a sealing material after passing through the pipeline of the first region.
5. The assembly according to claim 3, further comprising:
an electric heating device (8) located in the second zone and above the evaporator (4).
6. The plant according to claim 3, characterized in that said compressor (1) is located below said condenser (2) and said evaporator (4) is located within a preset distance below said condenser (2).
7. The assembly according to claim 3, characterized in that said condenser (2) and said evaporator (4) are arranged inclined, said condensed gas inlet being higher than said condenser (2) outlet, said evaporator (4) outlet being higher than said evaporator (4) inlet.
8. The assembly according to claim 7,
the left side of the condenser (2) is fixed on the left side wall of the first area, and the right side of the condenser (2) is fixed on the right side wall of the first area;
the left side of the evaporator (4) is fixed to the left side wall of the second area, and the right side of the evaporator (4) is fixed to the right side wall of the second area.
9. The assembly according to claim 3, further comprising:
a first fan (9) located in the first zone;
a second fan (10) located in the second zone;
the first fan (9) and the second fan (10) adopt any one of the following air inlet and outlet modes: side air inlet and side air outlet, side air inlet and upper air outlet, side air inlet and bottom air outlet, bottom air inlet and side air outlet, and upper air inlet and side air outlet; wherein, the air circulation of any air inlet and outlet mode passes through the condenser (2) or the evaporator (4).
10. The aggregate according to claim 1, characterized in that said throttle valve (3) comprises:
the valve body (30) is provided with a cavity, a refrigerant inlet (11) and a refrigerant outlet (12), and the refrigerant inlet (11) and the refrigerant outlet (12) are communicated with the cavity;
a valve spool (20), the valve spool (20) movably disposed within the valve body (30), the valve spool (20) having a throttling passage (21), the valve spool (20) having a throttling position and a normal flow position;
in the throttling position, the valve core (20) is positioned at the refrigerant inlet (11), the inlet of the throttling channel (21) is communicated with the refrigerant inlet (11), and the outlet of the throttling channel (21) is communicated with the refrigerant outlet (12);
in the normal circulation position, the valve core (20) avoids the refrigerant inlet (11) and the refrigerant outlet (12), the refrigerant inlet (11) is directly communicated with the refrigerant outlet (12) through the cavity, and the valve core (20) is switched between the throttling position and the normal position through movement.
11. An air conditioning unit control method applied to an air conditioning unit according to any one of claims 1 to 10, characterized by comprising:
after monitoring a starting signal, controlling a compressor to start;
detecting whether a heat pipe mode is triggered or not after the compressor is started;
if yes, the compressor is controlled to be closed, the air conditioning unit enters the heat pipe mode, and heat exchange is carried out through the heat pipe mode.
12. The method of claim 11, wherein after controlling the compressor to turn on, further comprising:
and after the first preset time, controlling the second fan to be started.
13. A storage medium containing computer-executable instructions for performing the air conditioning pack control method of any of claims 11 to 12 when executed by a computer processor.
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| CN202010930262.3A CN112066458B (en) | 2020-09-07 | 2020-09-07 | Air conditioning unit adopting throttle valve and control method thereof |
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| CN202010930262.3A CN112066458B (en) | 2020-09-07 | 2020-09-07 | Air conditioning unit adopting throttle valve and control method thereof |
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| CN112066458B CN112066458B (en) | 2024-07-16 |
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Cited By (1)
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| CN114484618A (en) * | 2022-01-25 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Air conditioner and control method thereof |
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| CN112066458B (en) | 2024-07-16 |
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