CN104236155B - Have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof - Google Patents

Have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof Download PDF

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Publication number
CN104236155B
CN104236155B CN201310247813.6A CN201310247813A CN104236155B CN 104236155 B CN104236155 B CN 104236155B CN 201310247813 A CN201310247813 A CN 201310247813A CN 104236155 B CN104236155 B CN 104236155B
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mouth
cross valve
coolant
heat
coil pipe
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CN104236155A (en
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毛守博
卢大海
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Haier Group Corp
Qingdao Haier Air Conditioning Electric Co Ltd
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Haier Group Corp
Qingdao Haier Air Conditioning Electric Co Ltd
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Abstract

The invention discloses have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof, including off-premises station and indoor units, described indoor units includes at least one indoor set, described off-premises station includes compressor, outdoor heat exchanger, outdoor throttling arrangement and cross valve, described indoor set includes indoor heat exchanger and indoor throttling arrangement, and described air conditioning system also includes heat-exchange device;The first coil pipe and the second coil pipe it is provided with in described heat-exchange device;The two ends of the first coil pipe connect with throttling arrangement outdoor throttling arrangement, indoor respectively;One end of second coil pipe connects with outdoor throttling arrangement, and its other end connects with the inlet end of described compressor.The secondary that this air conditioning system uses device to be simultaneously achieved coolant is supercool, and achieves during defrosting, while defrosting, indoor set is carried out heat supply;This air-conditioning is additionally provided with the module heat exchanger being connected with driven compressor module, carries out energy regenerating while cooling down driven compressor module.

Description

Have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof
Technical field
The present invention relates to air conditioner coolant supercool, defrosting heat technical field, particularly relate to one and there is coolant mistake Cold, the defrosting air conditioning system of heat-production functions and control method thereof.
Background technology
Air-conditioning is when refrigeration, when outdoor temperature is too high, from outdoor heat exchanger coolant out because of degree of supercooling not Foot, there is flash phenomenon, causes poor refrigerating efficiency in the coolant at liquid pipe pipeline;Air-conditioning, when heating, works as room When outer temperature is too low, outdoor heat exchanger occurs that frost, traditional air-conditioner defrosting operating use cross valve to cut Changing refrigeration refrigerant loop into, from the mode of indoor heat absorption, when can cause defrosting, air-conditioning does not heats, and also can simultaneously Heat in absorption chamber, causes fluctuations in indoor temperature big, the problem that comfort declines.
The problem of cold-producing medium shwoot during for solving to freeze, current industry usual way is to increase at condensator outlet Add a kind of subcooler, coolant is carried out secondary supercool.
For solving the problem causing indoor temperature to reduce when defrosting, air conditioning system devises a kind of accumulation of heat Device, thermophore can be stored by the high temperature refrigerant of auxiliary electrical heater or compressor side when indoor set heats operating Heat, when defrosting, from thermophore, heat removal defrosts.
In existing technology, the air conditioning system with two kinds of functions is less, even if if existing and need sky Adjusting system has the supercool function of secondary and defrosting function simultaneously, needs to increase by one in existing air conditioning system Supercooling apparatus and a thermophore, so can make the complexity that air conditioning system structure becomes, and volume becomes big, and can lead Cause the raising of production cost.And existing air conditioning system can not be to indoor heating when defrosting, optimal scheme It is to need air-conditioning to have a supercool function of coolant secondary, function to indoor heating while accumulation of heat and defrosting, But existing air conditioning system, does not only exist system design and controls complexity, and cost is high, there is also thermal storage defrosting Time the problem that can not heat of indoor set, thus reduce the user satisfaction of user.
Summary of the invention
It is an object of the invention to provide a kind of have coolant supercool, defrosting heat-production functions air conditioning system and Control method, it is possible to the secondary realizing coolant is supercool, and be capable of while defrosting indoor set is carried out Heat supply, and this air conditioning system simple in construction, easily manufactured, improve the comfort level that user uses.
For reaching this purpose, the present invention by the following technical solutions:
A kind of have coolant supercool, defrosting heat-production functions air conditioning system, including off-premises station and indoor units, Described indoor units includes that at least one indoor set, described off-premises station include compressor, outdoor heat exchanger, room Outer throttling arrangement and cross valve, described indoor set includes indoor heat exchanger and indoor throttling arrangement, wherein, institute State air conditioning system and also include heat-exchange device;
The first coil pipe and the second coil pipe it is provided with in described heat-exchange device;
The two ends of described first coil pipe connect with outdoor throttling arrangement, indoor throttling arrangement respectively;
One end of described second coil pipe connects with outdoor throttling arrangement, its other end and the air inlet of described compressor End connection.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described During the second coil pipe refrigeration, the inflow end of coolant is provided with coil pipe throttling arrangement.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described First coil pipe and the second coil pipe are arranged in a crossed manner in the housing closed.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described Phase change heat storage material it is filled with in housing.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described Air conditioning system also includes that module heat exchanger, described module heat exchanger are connected with driven compressor module.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described Cross valve includes D mouth, C mouth, S mouth and E mouth, and the D mouth of described cross valve connects with the gas outlet of compressor, The C mouth of described cross valve connects with outdoor heat exchanger, and the S mouth of described cross valve connects with the air inlet of compressor Logical, described second coil pipe connects with the E mouth of described cross valve, and makes the second coil pipe by the commutation of cross valve Connect with the air inlet of compressor.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described Air conditioning system also includes that the second cross valve, described second cross valve include D mouth, C mouth, S mouth and E mouth, institute The D mouth stating the second cross valve connects with the gas outlet of compressor, the C mouth of described second cross valve and described the The S mouth of two cross valves is connected by capillary tube, and the S mouth of described second cross valve connects with the inlet end of compressor Logical, the E mouth of described second cross valve connects with indoor heat exchanger, and described capillary tube is current limliting capillary tube.
Have that coolant is supercool, a kind of preferred version of air conditioning system of defrosting heat-production functions as above-mentioned, described Module heat exchanger is arranged in heat-exchange device, or described module heat exchanger be disposed in the outdoor throttling arrangement with On pipeline between heat-exchange device.
A kind of as described above have that coolant is supercool, the control method of air conditioning system of defrosting heat-production functions, It comprises the following steps:
Step A: open air conditioning system, if operation of air conditioner cooling operation enter step B, run heat operate into Enter step C, run defrosting and heat operating entrance step D;
Step B: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes Outdoor heat exchanger, outdoor throttling arrangement must be flowed through after cross valve successively from compressor coolant out, pass through A coolant part for outdoor throttling arrangement flows into indoor set through the first coil pipe, returns finally by the second cross valve Compressor, another part flows through the second coil pipe, finally by cross valve after coil pipe throttling arrangement reducing pressure by regulating flow Return compressor, complete a kind of refrigeration cycle;
Step C: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes The second coil pipe must be entered through cross valve from a compressor out coolant part;Another part coolant is through the two or four Logical valve enters indoor set;The first coil pipe is entered, from the after the coolant mixing out of the second coil pipe and indoor set One coil pipe coolant out by outdoor throttling arrangement laggard enter outdoor heat exchanger, return to finally by cross valve Compressor, completes once to heat circulation;
Step D: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes Must enter outdoor heat exchanger from a compressor coolant out part through cross valve, another part coolant passes through Second cross valve enters indoor set;After outdoor throttling arrangement, first is entered from outdoor heat exchanger coolant out Coil pipe, through coil pipe throttling arrangement enters second after converging with the coolant flowed out from indoor set after flowing through the first coil pipe Coil pipe, returns to compressor finally by cross valve, completes a heating and defrosting circulation.
As above-mentioned having that coolant is supercool, the control method of the air conditioning system of defrosting heat-production functions a kind of preferably Scheme,
In stepb, control system controls the C mouth of cross valve, D mouth, and S mouth, E mouth connect, and controls the The C mouth of two cross valves, D mouth, S mouth, E mouth connect;
In step C, control system controls the D mouth of cross valve, E mouth, and C mouth, S mouth connect, and controls the The D mouth of two cross valves, E mouth, C mouth, S mouth connect;
In step D, control system controls the D mouth of cross valve, C mouth, and E mouth, S mouth connect, and controls the The D mouth of two cross valves, E mouth, C mouth, S mouth connect.
Coolant is supercool, defrost heat-production functions by providing one to have to the invention have the benefit that the present invention Air conditioning system and control method, which increase heat-exchange device, and hand over first in device by heat Coil pipe, heat exchange between the second coil pipe and heat-storing material, it is achieved that in process of refrigerastion, the secondary of coolant is supercool, And heating operations achieves accumulation of heat in parallel, waste heat recovery of connecting;Achieve one device of employing the most real The secondary having showed coolant is supercool, and defrosting during achieve defrosting while indoor set is carried out Heat supply;The application is additionally provided with the module heat exchanger being connected with driven compressor module simultaneously, to compressor Energy regenerating is carried out while driving module cooling.
Accompanying drawing explanation
Fig. 1 be the specific embodiment of the invention 1 provide have coolant supercool and defrosting heat-production functions air-conditioning The structural representation of system;
Wherein:
1: off-premises station;2: indoor set;3: heat-exchange device;4: module heat exchanger;
11: compressor;12: outdoor heat exchanger;13: outdoor throttling arrangement;14: cross valve;15: the Two cross valves;
21: indoor heat exchanger;22: indoor throttling arrangement;
31: the first coil pipes;32: the second coil pipes;33: coil pipe throttling arrangement.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
As it is shown in figure 1, present embodiments provide for a kind of have coolant supercool, defrosting heat-production functions air-conditioning System, it has the function that coolant secondary is supercool during cooling in summer, and if in heating operations room When frosting occurs in outer machine, there is the function that indoor carry out while defrosting heat supply.
What above-mentioned air conditioning system was concrete includes off-premises station 1 and indoor units, and wherein indoor units includes at least one Platform indoor set 2, off-premises station 1 includes compressor 11, outdoor heat exchanger 12, outdoor throttling arrangement 13 and four-way Valve 14, certain off-premises station 1 also includes the usual means such as oil eliminator and gas-liquid separator, chats the most one by one at this State.Indoor set 2 includes indoor heat exchanger 21 and indoor throttling arrangement 22.The element of above-mentioned air conditioning system All arrangements and installation method by conventional air-conditioning are installed.
Above-mentioned air conditioning system also includes heat-exchange device 3, is provided with the first coil pipe 31 in this heat-exchange device 3 With the second coil pipe 32, wherein the two ends of the first coil pipe 31 fill with outdoor throttling arrangement 13 and indoor throttling respectively Putting 22 connections, one end of the second coil pipe 32 connects with outdoor throttling arrangement 13, its other end and compressor 11 Inlet end connection.During air conditioner refrigerating, flow through the refrigerant evaporation heat absorption of the second coil pipe 32, to first It is supercool that cold-producing medium in coil pipe 31 carries out secondary, for the ease of the evaporation of the cold-producing medium in the second coil pipe 32, Coolant in the second coil pipe 32 flows into end and is provided with coil pipe throttling arrangement 33.
In this embodiment, in order to improve the heat exchanger effectiveness between the first coil pipe 31 and the second coil pipe 32, This heat-exchange device also includes housing, and the first coil pipe 31 and the second coil pipe 32 arranged in a crossed manner at the shell closed Internal, and in housing, it is filled with phase change heat storage material, and then improve the first coil pipe 31 and the second coil pipe 32 Between heat exchanger effectiveness.
The air conditioning system that present embodiment provides also includes module heat exchanger 4, and this module heat exchanger 4 is arranged on room On pipeline between outer throttling arrangement 13 and heat-exchange device 3, it can also be arranged in heat-exchange device 3, Fig. 1 is shown that the pipeline that module heat exchanger is disposed in the outdoor between throttling arrangement 13 and heat-exchange device 3 On situation, real go out to be arranged on the situation in heat-exchange device 3.This module heat exchanger 4 drives with compressor Dynamic model block is connected, can be by this device and heat-exchange device 3 or outdoor throttling arrangement 13 and heat-exchange device The coolant in pipeline between 3 carries out heat exchange, cools down driven compressor module.
Above-mentioned cross valve 14 includes D mouth, C mouth, S mouth and E mouth, the D mouth compressor 11 of cross valve 14 Gas outlet connection, the C mouth of cross valve 14 connects with outdoor heat exchanger 22, the S mouth of cross valve 14 and pressure The air inlet connection of contracting machine 11, the second coil pipe 32 connects with the E mouth of cross valve 14, and by cross valve 14 Commutation make the second coil pipe 32 connect with the air inlet of compressor 11.
Air conditioning system also includes the second cross valve 15, this second cross valve 15 include D mouth, C mouth, S mouth and E mouth, the D mouth of the second cross valve 15 connects with the gas outlet of compressor 11, the C mouth of the second cross valve 15 Connected by capillary tube with the S mouth of the second cross valve 15, the S mouth of the second cross valve 15 and compressor 11 Inlet end connects, and the E mouth of the second cross valve 15 connects with indoor heat exchanger 21.Wherein, capillary tube is limited Stream capillary tube, i.e. when the S mouth of C mouth and second cross valve 15 of the second cross valve 15 connects, both it Between substantially pass through without coolant.
Present invention also provides the control method of a kind of above-mentioned air conditioning system, its concrete comprising the following steps:
Step A: open air conditioning system, if operation of air conditioner cooling operation enter step B, run heat operate into Enter step C, run defrosting and heat operating entrance step D;
Step B: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes Outdoor heat exchanger, outdoor throttling arrangement must be flowed through after cross valve successively from compressor coolant out, pass through A coolant part for outdoor throttling arrangement flows into indoor set through the first coil pipe, returns finally by the second cross valve Compressor, another part flows through the second coil pipe, finally by cross valve after coil pipe throttling arrangement reducing pressure by regulating flow Return compressor, complete a kind of refrigeration cycle;
Step C: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes The second coil pipe must be entered through cross valve from a compressor out coolant part;Another part coolant is through the two or four Logical valve enters indoor set;The first coil pipe is entered, from the after the coolant mixing out of the second coil pipe and indoor set One coil pipe coolant out by outdoor throttling arrangement laggard enter outdoor heat exchanger, return to finally by cross valve Compressor, completes once to heat circulation;
Step D: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, makes Must enter outdoor heat exchanger from a compressor coolant out part through cross valve, another part coolant passes through Second cross valve enters indoor set;After outdoor throttling arrangement, first is entered from outdoor heat exchanger coolant out Coil pipe, through coil pipe throttling arrangement enters second after converging with the coolant flowed out from indoor set after flowing through the first coil pipe Coil pipe, returns to compressor finally by cross valve, completes a heating and defrosting circulation.
Preferably,
In stepb, control system controls the C mouth of cross valve, D mouth, and S mouth, E mouth connect, and controls the The C mouth of two cross valves, D mouth, S mouth, E mouth connect;
In step C, control system controls the D mouth of cross valve, E mouth, and C mouth, S mouth connect, and controls the The D mouth of two cross valves, E mouth, C mouth, S mouth connect;
In step D, control system controls the D mouth of cross valve, C mouth, and E mouth, S mouth connect, and controls the The D mouth of two cross valves, E mouth, C mouth, S mouth connect.
In order to above-mentioned air conditioning system is further detailed, below with air conditioning system heat cold, heat, The operation principle of above-mentioned air conditioning system is illustrated by the flow direction of defrosting heating operations coolant.
Cooling operation:
In process of refrigerastion, the C mouth of cross valve 14, D mouth, S mouth, E mouth are in communication apparatus;Two or four Logical the C mouth of valve 15, D mouth, S mouth, E mouth are in connected state.
In the process, the flow direction of coolant is: from compressor 11 high temperature and high pressure gas out through cross valve 14 C mouth, D mouth flow through outdoor heat exchanger 12, outdoor throttling arrangement 13, module heat exchanger 4, coolant successively By carrying out heat exchange with driven compressor module during module heat exchanger 4, driven compressor module is cooled down Entering the first coil pipe 31 of heat-exchange device 3 afterwards, the coolant flowed out from the first coil pipe 31 is a part of through coil pipe Throttling arrangement 33 enters the second coil pipe 32, and another part enters indoor units, wherein, enters the second coil pipe The coolant of 32 after coil pipe throttling arrangement 33 reducing pressure by regulating flow in the second coil pipe 32 evaporation endothermic, simultaneously with First coil pipe 31 carries out heat exchange, and to realize the secondary of coolant in the first coil pipe 31 supercool, enters the second coil pipe The most laggard cross valve of coolant 14 in 32 returns to compressor 11.Enter the coolant of indoor units in indoor heat exchange Return compressor 11 through the second cross valve 15 after evaporation in device 21, complete a kind of refrigeration cycle.
Heat operating:
In heating operations, the D mouth of cross valve 14, E mouth, the connection of C mouth, S mouth, the second cross valve 15 D mouth, E mouth, C mouth, S mouth connect.
In the process, the flow direction of coolant is: pass through from a compressor 11 high temperature and high pressure gas part out Cross valve 14 enters the second coil pipe 32 of heat-exchange device 3 and condenses heat release, and the heat of release is filled by heat exchange Put the phase change heat storage material in 3 absorb and store;Another part coolant enters indoor set through the second cross valve 15 2 condensing heat-exchanges;From heat-exchange device 3 coolant out through coil pipe throttling arrangement 33 with through indoor heat exchanger 21 After coolant out converges, again enter heat-exchange device 3 through the first coil pipe 31, it is achieved the recovery of waste heat, From the first coil pipe 31 coolant out after module heat exchanger 4, by outdoor throttling arrangement 13 throttling fall It is pressed into into outdoor heat exchanger 12 evaporation endothermic, finally by returning to compressor 11 after cross valve 14.
This process carries out cooling down by module heat exchanger 4 to driven compressor module, utilizes heat to hand over simultaneously Changing device parallel connection accumulation of heat and series connection waste heat recovery, achieve heat-exchange device while to indoor set heat supply Accumulation of heat.
Defrosting heating operation:
In the process, the D mouth of cross valve 14, C mouth, the connection of E mouth, S mouth, the second cross valve 15 D mouth, E mouth, C mouth, S mouth connect;
In the process, the flow direction of coolant is: pass through from a compressor 11 high temperature and high pressure gas part out Cross valve 11 enters outdoor heat exchanger 12 and condenses heat release, releases heat and carries out defrost, another part coolant Enter indoor set 2 through the second cross valve 15 to heat;From outdoor heat exchanger 12 coolant out through outdoor joint Stream device 13, module heat exchanger 4, then from the first coil pipe 31 of heat-exchange device 3 out after with from indoor The coolant returned enters heat-exchange device 3 through coil pipe throttling arrangement 33 after converging and absorbs heat, and finally again passes by four Compressor 11 is returned to after logical valve 14.
The heat of this process thermophore storage heats for off-premises station defrost and indoor set from thermophore release, carries High comfortableness.
The know-why of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain this The principle of invention, and limiting the scope of the invention can not be construed to by any way.Based on herein Explaining, those skilled in the art need not pay performing creative labour can associate other tool of the present invention Body embodiment, within these modes fall within protection scope of the present invention.

Claims (9)

1. have coolant supercool, defrosting heat-production functions an air conditioning system, including off-premises station (1) and room Interior unit, described indoor units includes that at least one indoor set (2), described off-premises station (1) include compressor (11), outdoor heat exchanger (12), outdoor throttling arrangement (13) and cross valve (14), described indoor set (2) Including indoor heat exchanger (21) and indoor throttling arrangement (22), it is characterised in that described air conditioning system is also wrapped Include heat-exchange device (3);
The first coil pipe (31) and the second coil pipe (32) it is provided with in described heat-exchange device (3);
The two ends of described first coil pipe (31) respectively with outdoor throttling arrangement (13), indoor throttling arrangement (22) Connection;
One end of described second coil pipe (32) connects with outdoor throttling arrangement (13), and its other end is with described The inlet end connection of compressor (11);
Described cross valve (14) includes D mouth, C mouth, S mouth and E mouth, the D mouth of described cross valve (14) Connecting with the gas outlet of compressor, C mouth connects with outdoor heat exchanger (12), S mouth and compressor (11) Air inlet connects, and described second coil pipe (32) is connected with E mouth, and made by the commutation of cross valve (14) Second coil pipe (32) connects with the air inlet of compressor (11).
The most according to claim 1 have that coolant is supercool, the air conditioning system of defrosting heat-production functions, and it is special Levying and be, during described second coil pipe (32) refrigeration, the inflow end of coolant is provided with coil pipe throttling arrangement (33).
The most according to claim 1 have that coolant is supercool and the air conditioning system of defrosting heat-production functions, and it is special Levying and be, described first coil pipe (31) and the second coil pipe (32) are arranged in a crossed manner in the housing closed.
The most according to claim 3 have that coolant is supercool, the air conditioning system of defrosting heat-production functions, and it is special Levy and be, in described housing, be filled with phase change heat storage material.
The most according to claim 1 have that coolant is supercool, the air conditioning system of defrosting heat-production functions, and it is special Levying and be, described air conditioning system also includes module heat exchanger (4), described module heat exchanger (4) and compressor Driving module is connected.
The most according to claim 1 have that coolant is supercool, the air conditioning system of defrosting heat-production functions, and it is special Levying and be, described air conditioning system also includes that the second cross valve (15), described second cross valve (15) include D Mouth, C mouth, S mouth and E mouth, the D mouth of described second cross valve (15) and the gas outlet of compressor (11) Connection, C mouth is connected by capillary tube with S mouth, and S mouth connects with the inlet end of compressor (11), E mouth and Indoor heat exchanger (21) connects, and described capillary tube is current limliting capillary tube.
The most according to claim 5 have that coolant is supercool, the air conditioning system of defrosting heat-production functions, and it is special Levying and be, described module heat exchanger (4) is arranged in heat-exchange device (3), or described module heat exchange Device (4) is disposed in the outdoor on the pipeline between throttling arrangement (13) and heat-exchange device (3).
8. as claim 6 has, coolant is supercool, a control method for the air conditioning system of the heat-production functions that defrosts, It is characterized in that, comprise the following steps:
Step A: open air conditioning system, if operation of air conditioner cooling operation enter step B, run heat operate into Enter step C, run defrosting and heat operating entrance step D;
Step B: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, Make after cross valve, to flow through outdoor heat exchanger, outdoor throttling arrangement, warp successively from compressor coolant out The coolant part crossing outdoor throttling arrangement flows into indoor set through the first coil pipe, returns finally by the second cross valve Returning compressor, another part flows through the second coil pipe, finally by four-way after coil pipe throttling arrangement reducing pressure by regulating flow Valve returns compressor, completes a kind of refrigeration cycle;
Step C: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, Make to enter the second coil pipe from a compressor out coolant part through cross valve;Another part coolant is through second Cross valve enters indoor set;The first coil pipe is entered after the second coil pipe and indoor set coolant mixing out, from First coil pipe coolant out by outdoor throttling arrangement laggard enter outdoor heat exchanger, return finally by cross valve To compressor, complete once to heat circulation;
Step D: the device that controls of air conditioning system controls cross valve, the connected state of the second cross valve valve port, Make from compressor out coolant a part through cross valve enter outdoor heat exchanger, another part coolant warp Cross the second cross valve and enter indoor set;After outdoor throttling arrangement, the is entered from outdoor heat exchanger coolant out One coil pipe, through coil pipe throttling arrangement enters the after converging with the coolant flowed out from indoor set after flowing through the first coil pipe Two coil pipes, return to compressor finally by cross valve, complete a heating and defrosting circulation.
The most according to claim 8 have that coolant is supercool, the control of air conditioning system of defrosting heat-production functions Method, it is characterised in that
In stepb, control system controls the C mouth of cross valve and connects with D mouth, and S mouth connects with E mouth, The C mouth controlling the second cross valve connects with D mouth, and S mouth connects with E mouth;
In step C, control system controls the D mouth of cross valve and connects with E mouth, and C mouth connects with S mouth, The D mouth controlling the second cross valve connects with E mouth, and C mouth connects with S mouth;
In step D, control system controls the D mouth of cross valve and connects with C mouth, and E mouth connects with S mouth, The D mouth controlling the second cross valve connects with E mouth, and C mouth connects with S mouth.
CN201310247813.6A 2013-06-20 2013-06-20 Have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof Active CN104236155B (en)

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