CN104329825A - Three-pipe air conditioning system and control method thereof - Google Patents
Three-pipe air conditioning system and control method thereof Download PDFInfo
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- CN104329825A CN104329825A CN201310309783.7A CN201310309783A CN104329825A CN 104329825 A CN104329825 A CN 104329825A CN 201310309783 A CN201310309783 A CN 201310309783A CN 104329825 A CN104329825 A CN 104329825A
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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
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a three-pipe air conditioning system and a control method thereof. An outdoor unit of the air conditioning system comprises a compressor, a refrigerant reversing valve set, two outdoor heat exchangers and corresponding a first distribution pipe, a third distribution pipe and a branch pipeline of the first distribution pipe, a heat adjusting heat exchanger for connecting the branch pipeline with the third distribution pipe and the like, wherein the states of the two outdoor heat exchangers can be adjusted according to the system operation conditions; when the first outdoor heat exchanger is a condenser, and the second outdoor heat exchanger is an evaporator, the branch pipeline releases heat, and the third distribution pipe absorbs the heat, so that the system air return superheat degree is improved when improving the supercooling degree of the condenser, that is, the system reliability is improved when guaranteeing the effect; an adjustable throttle part can be additionally arranged on the branch pipeline; under the conditions, the adjustable throttle part adjusts the refrigerant flow according to the supercooling degree of the condenser or the air return superheat degree; and when the two outdoor heat exchangers are in other states, the adjustable throttle part is closed to guarantee the system to be operated under reliable and optimal conditions.
Description
Technical field
The invention belongs to air-conditioning technical field, more particularly, relate to a kind of three control air-conditioning system and control methods thereof.
Background technology
Three control air-conditioning system outdoor air-conditioners comprise two panels heat exchanger, and the state of heat exchanger can regulate according to running situation, when two panels heat exchanger a slice is condenser, when a slice is evaporimeter, just there is heat of high temperature and low temperature cold in outdoor air-conditioner, three control air-conditioning systems of prior art do not carry out utilizing effectively fully to these heats and cold simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of three control air-conditioning system and control methods thereof, be intended to the heat transmission effectively utilizing system, while realizing the degree of supercooling of system condenser, improve the return-air degree of superheat, improve system reliability.
For achieving the above object, the technical solution used in the present invention is: providing a kind of three control air-conditioning systems, comprising off-premises station and the high-pressure liquid tube for being connected with at least one indoor set by described off-premises station, low pressure gas pipe and high-pressure air pipe;
Described off-premises station comprises at least one compressor of at least one compressor, refrigerant reversal valve group, the first outdoor heat exchanger be connected in parallel and the second outdoor heat exchanger and a heat regulation heat exchanger;
Described heat regulation heat exchanger has the first refrigerant interface and the second refrigerant interface that are communicated with by a heat dissipation pipeline, the 3rd refrigerant interface be communicated with by another heat dissipation pipeline and the 4th refrigerant interface;
Second port of described first outdoor heat exchanger is connected with the first pipe arrangement, and the second port of described second outdoor heat exchanger is connected with the second pipe arrangement, and described first pipe arrangement is connected with described high-pressure liquid tube jointly with described second pipe arrangement; Be parallel with one with described first pipe arrangement and be connected the first refrigerant interface of described heat regulation heat exchanger and the branch line of the second refrigerant interface;
3rd refrigerant interface of described heat regulation heat exchanger is connected with the first port of the second outdoor heat exchanger by the 3rd pipe arrangement; 4th refrigerant interface of described heat regulation heat exchanger is connected with described refrigerant reversal valve group by pipeline.
Further, described branch line is serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger.
Particularly, described refrigerant reversal valve group first cross valve, the second cross valve, the 3rd cross valve, the first closure member, the second closure member, the 3rd closure member;
The D mouth of pipe of the D mouth of pipe of described first cross valve, the D mouth of pipe of described second cross valve, described 3rd cross valve is connected with the exhaust outlet of described compressor jointly by pipeline, and the air entry of described compressor is connected with described low pressure gas pipe by low pressure muffler;
The C mouth of pipe of described first cross valve is connected by first port of pipeline with described first outdoor heat exchanger, and the C mouth of pipe of described 3rd cross valve is connected with described high-pressure air pipe;
The S mouth of pipe of described first cross valve, the S mouth of pipe of described second cross valve are all connected with described low pressure gas pipe with the S mouth of pipe of described 3rd cross valve;
Be connected with described low pressure gas pipe after described first closure member of E mouth of pipe serial connection of described first cross valve, be connected with described low pressure gas pipe after described second closure member of E mouth of pipe serial connection of described second cross valve, be connected with described low pressure gas pipe after described 3rd closure member of E mouth of pipe serial connection of described 3rd cross valve;
4th refrigerant interface of described heat regulation heat exchanger is connected with the C mouth of pipe of described second cross valve.
Alternatively, described heat regulation heat exchanger is plate type heat exchanger, double pipe heat exchanger.
Further, described low pressure muffler is also provided with a gas-liquid separator, the air inlet pipe of described gas-liquid separator is connected with described low pressure gas pipe, and escape pipe is connected with the air entry of described compressor.
Alternatively, described first closure member and/or the second closure member and/or the 3rd closure member are electric expansion valve, magnetic valve or the capillary with refrigerant break-in facility.
Preferably, described adjustable throttle parts are electric expansion valve.
For achieving the above object, the present invention also provides a kind of control method of three above-mentioned control air-conditioning systems, comprising:
Control described first cross valve, the second cross valve, the 3rd cross valve be in corresponding state, make described first outdoor heat exchanger serve as condenser, described second outdoor heat exchanger serves as evaporimeter, for promoting degree of supercooling and the system return air degree of superheat of condenser.
Further, described three control air-conditioning systems are also serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger on described branch line;
Described air-conditioning system running refrigerating pattern; And
Control described first cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described second cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described 3rd cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described adjustable throttle parts open and regulate cold medium flux according to degree of supercooling and the system return air degree of superheat;
When not being when described first outdoor heat exchanger serves as condenser, described second outdoor heat exchanger serves as the situation of evaporimeter, controlling described adjustable throttle parts and closing.
Or further, described three control air-conditioning systems are also serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger on described branch line;
Described air-conditioning system runs heating mode; And
Control described first cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described second cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described 3rd cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described adjustable throttle parts open and regulate cold medium flux according to degree of supercooling and the system return air degree of superheat;
When not being when described first outdoor heat exchanger serves as condenser, described second outdoor heat exchanger serves as the situation of evaporimeter, controlling described adjustable throttle parts and closing.
The beneficial effect of three control air-conditioning systems provided by the invention and control method thereof is:
(1) off-premises station of the present invention three control air-conditioning system comprises two states (serving as condenser or evaporimeter) and can carry out according to the ruuning situation of system the heat exchanger that regulates, also set up a heat regulation heat exchanger simultaneously, the first pipe arrangement be connected with the second port of a first outdoor heat exchanger branch line in parallel, this branch line connects the first refrigerant interface and the second refrigerant interface of heat regulation heat exchanger, and the 3rd pipe arrangement be connected with the first port of the second outdoor heat exchanger connects the 3rd refrigerant interface and the 4th refrigerant interface of heat regulation heat exchanger, like this, by corresponding control, when the first outdoor heat exchanger serves as condenser, when second outdoor heat exchanger is evaporimeter, branch line heat release, 3rd pipe arrangement pipeline heat absorption, on the one hand, branch line liberated heat is absorbed the object reaching the degree of supercooling promoting condenser by heat regulation heat exchanger, on the other hand, and these heats pass to the 3rd pipe arrangement pipeline for its absorption by heat regulation heat exchanger, so reach again the object that improve the return-air degree of superheat, namely, system reliability is improve while in order to be effective,
(2) branch line is connected to adjustable throttle parts, like this, when the first outdoor heat exchanger is condenser, when the second outdoor heat exchanger is evaporimeter, adjustable throttle parts can regulate cold medium flux according to the degree of superheat of the degree of supercooling of condenser or return-air; When the first outdoor heat exchanger and the second outdoor heat exchanger are other state, adjustable throttle parts are in closed condition, ensure further air-conditioning system when reliable and best run.
Accompanying drawing explanation
The principle assumption diagram of the three control air-conditioning systems that Fig. 1 provides for the embodiment of the present invention one;
The state diagram of the running refrigerating pattern of the three control air-conditioning systems that Fig. 2 provides for the embodiment of the present invention one, wherein, the first outdoor heat exchanger serves as condenser, the second outdoor heat exchanger serves as evaporimeter;
The state diagram of the operation heating mode of the three control air-conditioning systems that Fig. 3 provides for the embodiment of the present invention one, wherein, the first outdoor heat exchanger serves as condenser, the second outdoor heat exchanger serves as evaporimeter;
The state diagram of the running refrigerating pattern of the three control air-conditioning systems that Fig. 4 provides for the embodiment of the present invention one, wherein, the first outdoor heat exchanger, the second outdoor heat exchanger all serve as condenser;
The state diagram of the operation heating mode of the three control air-conditioning systems that Fig. 5 provides for the embodiment of the present invention one, wherein, the first outdoor heat exchanger, the second outdoor heat exchanger all serve as evaporimeter;
The principle assumption diagram of the three control air-conditioning systems that Fig. 6 provides for the embodiment of the present invention two.
Detailed description of the invention
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, the three control air-conditioning systems that the present embodiment provides comprise off-premises station 100 and the high-pressure liquid tube 101 for being connected with at least one indoor set by off-premises station 100, low pressure gas pipe 102 and high-pressure air pipe 103; Wherein off-premises station 100 comprises at least one compressor 1, refrigerant reversal valve group, the first outdoor heat exchanger 51 be connected in parallel and the second outdoor heat exchanger 52 and heat regulation heat exchanger 6; Wherein, the 3rd refrigerant interface 63 of heat regulation heat exchanger 6 is connected with the first port 521 of the second outdoor heat exchanger 52 by the 3rd pipe arrangement 113; And the second port 522 that the second port 512 of the first outdoor heat exchanger 51 is connected with the first pipe arrangement 111, the second outdoor heat exchanger 52 is connected with the second pipe arrangement 112, the first pipe arrangement 111 with the second pipe arrangement 112 is jointly connected with high-pressure liquid tube 101; Be parallel with one with the first pipe arrangement 111 and be connected the first refrigerant interface 61 of heat regulation heat exchanger 6 and the branch line 110 of the second refrigerant interface 62.
Three above-mentioned control air-conditioning systems, when the first outdoor heat exchanger 511 serves as condenser, when second outdoor heat exchanger 52 is evaporimeter, branch line 110 heat release, 3rd pipe arrangement 113 pipeline heat absorption, on the one hand, branch line 110 liberated heat is absorbed the object reaching the degree of supercooling promoting condenser by heat regulation heat exchanger 6, on the other hand, and these heats pass to the 3rd pipe arrangement 113 pipeline for its absorption by heat regulation heat exchanger 6, so reach again the object that improve the return-air degree of superheat, that is, while in order to be effective, improve system reliability.
In the present embodiment, described refrigerant reversal valve group comprises the first cross valve 21, second cross valve 22, the 3rd cross valve 23, first closure member 31, second closure member 32, the 3rd closure member 33, first outdoor heat exchanger 51 and the second outdoor heat exchanger 52, heat regulation heat exchanger 6; The 3rd refrigerant interface 63 that this kind of heat regulation heat exchanger 6 have the first refrigerant interface 61 of being communicated with by a heat dissipation pipeline and the second refrigerant interface 62, be communicated with by another heat dissipation pipeline and the 4th refrigerant interface 64;
Wherein, the D mouth of pipe of the D mouth of pipe of the first cross valve 21, the D mouth of pipe of the second cross valve 22, the 3rd cross valve 23 is connected with the exhaust outlet 12 of compressor 1 jointly by pipeline, and the air entry 11 of compressor 1 is connected with low pressure gas pipe 102 by low pressure muffler 104; The C mouth of pipe of the first cross valve 21 is connected with the first port 511 of the first outdoor heat exchanger 51 by pipeline, and the C mouth of pipe of the 3rd cross valve 23 is connected with high-pressure air pipe 103; The S mouth of pipe of the first cross valve 21, the S mouth of pipe of the second cross valve 22 are all connected with low pressure gas pipe 102 with the S mouth of pipe of the 3rd cross valve 23; The E mouth of pipe of the first cross valve 21 is connected in series the first closure member 31 and is connected with low pressure gas pipe 102 afterwards, the E mouth of pipe of the second cross valve 22 is connected in series the second closure member 32 and is connected with low pressure gas pipe 102 afterwards, is connected after E mouth of pipe serial connection the 3rd closure member 33 of the 3rd cross valve 23 with low pressure gas pipe 102;
4th refrigerant interface 64 of heat regulation heat exchanger 6 is connected with the C mouth of pipe of the second cross valve 22.
In the present embodiment, in order to ensure further air-conditioning system when reliable and best run, branch line 110 is serially connected with adjustable throttle parts 4 with the first refrigerant interface 61 of heat regulation heat exchanger 6, like this, adjustable throttle parts 4 can regulate cold medium flux according to the degree of superheat of the degree of supercooling of condenser or return-air; When the first outdoor heat exchanger 511 and the second outdoor heat exchanger 52 are other state, adjustable throttle parts 4 are in closed condition.
In the present embodiment, for ensureing its heat exchange efficiency, make full use of heat during system cloud gray model, heat regulation heat exchanger 6 can be selected but be not limited to plate type heat exchanger or double pipe heat exchanger.
In the present embodiment, compressor 1 can select frequency-changing cyclone compressor, digital scroll compressor, rotor compressor, but is also not limited to these three kinds.
In the present embodiment, the first closure member 31, second closure member 32, the 3rd closure member 33 can select electric expansion valve, magnetic valve or the one had in the capillary of refrigerant break-in facility or not of the same race.
And adjustable throttle parts 4 preferred electron expansion valve, because electric expansion valve reaction speed is fast, accurately can control the flow of refrigerant, control suction superheat better, adapt to larger refrigeration scope, certainly, also can be heating power expansion valve.
In addition, in order to can Non-follow control open and close spool control refrigerant by with cut-off, provide convenience for installing and overhaul air-conditioning system, high-pressure liquid tube 101 can also arrange a stop valve 71, low pressure gas pipe 102 can also arrange a stop valve 72, high-pressure air pipe 103 can also be arranged a stop valve 73.
In the present embodiment, refer to Fig. 6, for ensureing the security reliability of system, also gas-liquid separator is provided with further on low pressure muffler 104, the air inlet pipe of gas-liquid separator is connected with low pressure gas pipe 102, escape pipe is connected with the air entry 11 of compressor 1, thus stops liquid refrigerants and enter in compressor 1 and produce liquid hit phenomenon and cause the system failure.
It should be noted that, a kind of embodiment that above-mentioned embodiment just provides to be described principle of the present invention, wherein, first outdoor heat exchanger 511 and the second outdoor heat exchanger 52 layout are spatially arranged including but not limited to left and right two-piece type, upper and lower two-piece type is arranged, and the position of the first outdoor heat exchanger 511 and the second outdoor heat exchanger 52 can exchange.
For achieving the above object, the present invention also provides a kind of control method of three above-mentioned control air-conditioning systems, is described in detail below in conjunction with embodiment.
As long as control method of the present invention controls the first cross valve 21, second cross valve 22 by the controller of system, the 3rd cross valve 23 is in corresponding state, make the first outdoor heat exchanger 51 serve as condenser, the second outdoor heat exchanger 52 serves as evaporimeter, can realize promoting the degree of supercooling of condenser and the object of the system return air degree of superheat by heat regulation heat exchanger 6.
Adjustable throttle parts 4 are serially connected with the first refrigerant interface 61 of heat regulation heat exchanger 6 further on branch line 110, like this, when the first outdoor heat exchanger 511 is condenser, when second outdoor heat exchanger 52 is evaporimeter, adjustable throttle parts 4 can regulate cold medium flux according to the degree of superheat of the degree of supercooling of condenser or return-air; When the first outdoor heat exchanger 511 and the second outdoor heat exchanger 52 are other state, adjustable throttle parts 4 are in closed condition, ensure further air-conditioning system when reliable and best run.
Embodiment one
Refer to Fig. 2, when air-conditioning system running refrigerating pattern; And
Control the first cross valve 21 and be in off-position, it is in inside, and the D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control the second cross valve 22 and be in "on" position, it is in inside, and the D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control the 3rd cross valve 23 and be in "on" position, it is in inside, and the D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Now, the first outdoor heat exchanger 51 serves as condenser, the second outdoor heat exchanger 52 serves as evaporimeter, and adjustable throttle parts 4 are opened and regulated cold medium flux according to degree of supercooling and the system return air degree of superheat;
Refrigerant in system flows to and refers to arrow points in Fig. 2, be specially: enter into the first pipe arrangement 111 from becoming the liquid refrigerant of HTHP after the exhaust outlet 12 high pressure gaseous refrigerant out of compressor 1 flows to the first outdoor heat exchanger 51 condensation heat release after the first cross valve 21, then two-way is divided into, the first via still continues stream along the first pipe arrangement 111, second tunnel flows in branch line 110 to enter in heat regulation heat exchanger 6 after adjustable throttle parts 4 throttling continues heat release (liberated heat passes to the adjustable heat exchanger 6 of heat) and promotes its degree of supercooling, then with converge rear continuation with the first via refrigerant flowed along the first pipe arrangement 111 again and flow to low pressure direction along the first pipe arrangement 111, when flowing to the first pipe arrangement 111, high-pressure liquid tube 101, during the junction of the second pipe arrangement 112, refrigerant has and is divided into two-way, high-pressure liquid tube 101 of leading up to flows to indoor set, second pipe arrangement 112 of separately leading up to is flowed to heat absorption evaporation in the second outdoor heat exchanger 52 and is entered in heat regulation heat exchanger 6 by the 3rd pipe arrangement 113 and continues heat absorption (the very most of heat absorbed from the refrigerant branch line 110 from heat regulation heat exchanger 6 of this part heat) evaporation, the degree of superheat is promoted, become warm low-pressure gaseous refrigerant stream and the refrigerant that flows to indoor set absorbs heat after evaporation and flows to low pressure muffler 104 by high-pressure air pipe 103 and low pressure gas pipe 102 in indoor heat exchanger, and this part refrigerant and the second outdoor heat exchanger 52 middle temperature low-pressure gaseous refrigerant out converges common stream enters low pressure muffler 104 and get back in compressor 1, because the second outdoor heat exchanger 52 refrigerant degree of superheat out gets a promotion, after converging with indoor set low pressure refrigerant out, the degree of superheat of the refrigerant of system low-voltage side is totally promoted, the lifting of the degree of supercooling of high pressure liquid side refrigerant improves the refrigeration of whole system, and the lifting of the degree of superheat of return-air side refrigerant has prevented liquid refrigerants from getting back in compressor 1, improves the reliability of system.
Refer to Fig. 4, Fig. 5, when not being when the first outdoor heat exchanger 51 serves as condenser, the second outdoor heat exchanger 52 serves as the situation of evaporimeter, controlling adjustable throttle parts 4 and closing.Wherein, Fig. 4 is the UNICOM's state by controlling three cross valves, system cloud gray model refrigeration mode wherein, first outdoor heat exchanger 51, second outdoor heat exchanger 52 all serves as condenser, Fig. 5 be system cloud gray model heating mode wherein, the first outdoor heat exchanger 51, second outdoor heat exchanger 52 all serves as evaporimeter; Both of these case only for when not being that the first outdoor heat exchanger 51 serves as condenser, the second outdoor heat exchanger 52 illustrates system running state when serving as the situation of evaporimeter, is not limited to this two kinds of running statuses; Certainly, by the control of the state to three cross valves, the present invention three control air-conditioning system also has other running status, such as also can occur the situation that the first outdoor heat exchanger 51 serves as evaporimeter, the second outdoor heat exchanger 52 serves as condenser, just these running statuses do not realize promoting the degree of supercooling of condenser and the object of the system return air degree of superheat by heat regulation heat exchanger 6.
Embodiment two
Refer to Fig. 3, when air-conditioning system runs heating mode; And
First cross valve 21 is identical with the state in embodiment one with the state of the second cross valve 22, remains unchanged, now, the first outdoor heat exchanger 51 serves as condenser, the second outdoor heat exchanger 52 serves as evaporimeter, and adjustable throttle parts 4 are also still opened and regulated cold medium flux according to degree of supercooling and the system return air degree of superheat, and be in off-position by control the 3rd cross valve 23, it is in inside, the D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe, system cloud gray model is to indoor heating pattern, refrigerant in its system flows to and refers to arrow points in Fig. 2, refrigerant just in high-pressure liquid tube 101 and high-pressure air pipe 103 flows to contrary with the flow direction in embodiment one, refrigerant is at the first outdoor heat exchanger 51, second outdoor heat exchanger 52, branch line 110, first pipe arrangement 111, second pipe arrangement 112, identical all with embodiment one of the flow direction in 3rd pipe arrangement 113, can reach in a heating mode equally and promote the degree of supercooling of condenser and the object of the system return air degree of superheat, identical with embodiment one of principle, repeat no more herein.
When not being when the first outdoor heat exchanger 51 serves as condenser, the second outdoor heat exchanger 52 serves as the situation of evaporimeter, controlling adjustable throttle parts 4 and closing.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. three control air-conditioning systems, comprise off-premises station and the high-pressure liquid tube for being connected with at least one indoor set by described off-premises station, low pressure gas pipe and high-pressure air pipe; It is characterized in that:
Described off-premises station comprises at least one compressor, refrigerant reversal valve group, the first outdoor heat exchanger be connected in parallel and the second outdoor heat exchanger and a heat regulation heat exchanger;
Described heat regulation heat exchanger has the first refrigerant interface and the second refrigerant interface that are communicated with by a heat dissipation pipeline, the 3rd refrigerant interface be communicated with by another heat dissipation pipeline and the 4th refrigerant interface;
Second port of described first outdoor heat exchanger is connected with the first pipe arrangement, and the second port of described second outdoor heat exchanger is connected with the second pipe arrangement, and described first pipe arrangement is connected with described high-pressure liquid tube jointly with described second pipe arrangement; Be parallel with one with described first pipe arrangement and be connected the first refrigerant interface of described heat regulation heat exchanger and the branch line of the second refrigerant interface;
3rd refrigerant interface of described heat regulation heat exchanger is connected with the first port of the second outdoor heat exchanger by the 3rd pipe arrangement; 4th refrigerant interface of described heat regulation heat exchanger is connected with described refrigerant reversal valve group by pipeline.
2. three control air-conditioning systems as claimed in claim 1, is characterized in that: described branch line is serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger.
3. three control air-conditioning systems as claimed in claim 1 or 2, is characterized in that: described refrigerant reversal valve group comprises the first cross valve, the second cross valve, the 3rd cross valve, the first closure member, the second closure member, the 3rd closure member; The D mouth of pipe of the D mouth of pipe of described first cross valve, the D mouth of pipe of described second cross valve, described 3rd cross valve is connected with the exhaust outlet of described compressor jointly by pipeline, and the air entry of described compressor is connected with described low pressure gas pipe by low pressure muffler;
The C mouth of pipe of described first cross valve is connected by first port of pipeline with described first outdoor heat exchanger, and the C mouth of pipe of described 3rd cross valve is connected with described high-pressure air pipe;
The S mouth of pipe of described first cross valve, the S mouth of pipe of described second cross valve are all connected with described low pressure gas pipe with the S mouth of pipe of described 3rd cross valve;
Be connected with described low pressure gas pipe after described first closure member of E mouth of pipe serial connection of described first cross valve, be connected with described low pressure gas pipe after described second closure member of E mouth of pipe serial connection of described second cross valve, be connected with described low pressure gas pipe after described 3rd closure member of E mouth of pipe serial connection of described 3rd cross valve;
4th refrigerant interface of described heat regulation heat exchanger is connected with the C mouth of pipe of described second cross valve.
4. three control air-conditioning systems as claimed in claim 1 or 2, is characterized in that: described heat regulation heat exchanger is plate type heat exchanger, double pipe heat exchanger.
5. three control air-conditioning systems as claimed in claim 3, it is characterized in that: described low pressure muffler is also provided with a gas-liquid separator, the air inlet pipe of described gas-liquid separator is connected with described low pressure gas pipe, and escape pipe is connected with the air entry of described compressor.
6. three control air-conditioning systems as claimed in claim 3, is characterized in that: described first closure member and/or the second closure member and/or the 3rd closure member are electric expansion valve, magnetic valve or the capillary with refrigerant break-in facility.
7. three control air-conditioning systems as claimed in claim 2, is characterized in that: described adjustable throttle parts are electric expansion valve.
8. the control method of three control air-conditioning systems as claimed in claim 1, is characterized in that, comprising:
Control described first cross valve, the second cross valve, the 3rd cross valve be in corresponding state, make described first outdoor heat exchanger serve as condenser, described second outdoor heat exchanger serves as evaporimeter, for promoting degree of supercooling and the system return air degree of superheat of condenser.
9. the control method of three control air-conditioning systems as claimed in claim 8, is characterized in that:
Described three control air-conditioning systems are also serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger on described branch line;
Described air-conditioning system running refrigerating pattern; And
Control described first cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described second cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described 3rd cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described adjustable throttle parts open and regulate cold medium flux according to degree of supercooling and the system return air degree of superheat;
When not being when described first outdoor heat exchanger serves as condenser, described second outdoor heat exchanger serves as the situation of evaporimeter, controlling described adjustable throttle parts and closing.
10. the control method of three control air-conditioning systems as claimed in claim 8, is characterized in that:
Described three control air-conditioning systems are also serially connected with adjustable throttle parts with the first refrigerant interface of described heat regulation heat exchanger on described branch line;
Described air-conditioning system runs heating mode; And
Control described first cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described second cross valve and be in "on" position, its D mouth of pipe is communicated with the E mouth of pipe, the C mouth of pipe is communicated with the S mouth of pipe;
Control described 3rd cross valve and be in off-position, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe;
Control described adjustable throttle parts open and regulate cold medium flux according to degree of supercooling and the system return air degree of superheat;
When not being when described first outdoor heat exchanger serves as condenser, described second outdoor heat exchanger serves as the situation of evaporimeter, controlling described adjustable throttle parts and closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310309783.7A CN104329825A (en) | 2013-07-22 | 2013-07-22 | Three-pipe air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310309783.7A CN104329825A (en) | 2013-07-22 | 2013-07-22 | Three-pipe air conditioning system and control method thereof |
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| CN104329825A true CN104329825A (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310309783.7A Pending CN104329825A (en) | 2013-07-22 | 2013-07-22 | Three-pipe air conditioning system and control method thereof |
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