CN104930600A - Outdoor unit of two-tube type heat recovery system and two-tube type heat recovery system with outdoor unit - Google Patents
Outdoor unit of two-tube type heat recovery system and two-tube type heat recovery system with outdoor unit Download PDFInfo
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- CN104930600A CN104930600A CN201510151357.4A CN201510151357A CN104930600A CN 104930600 A CN104930600 A CN 104930600A CN 201510151357 A CN201510151357 A CN 201510151357A CN 104930600 A CN104930600 A CN 104930600A
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- heat exchanger
- recovery system
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
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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]
- Y02B30/56—Heat recovery units
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to a two-tube type heat recovery system and an outdoor unit of the two-tube type heat recovery system. The outdoor unit is provided with a first connector and a second connector. The outdoor unit comprises a compressor, a reversing assembly and an outdoor heat exchanger. The outdoor heat exchanger comprises a plurality of first heat exchange channels and a second heat exchange channel. The first heat exchange channels are arranged in sequence in the vertical direction, and the second heat exchange channel is located below the first heat exchange channels. Each first heat exchange channel is connected with a fourth valve port and the second connector, and a first control valve which is used for controlling a flow path to be connected and disconnected is connected between each first heat exchange channel and the fourth valve port in series. The second heat exchange channel is connected with an exhaust port and the second connector, and a second control valve which is used for controlling the flow path to be connected and disconnected is connected between the second heat exchange channel and the exhaust port in series. By the adoption of the outdoor unit, the defrosting time is short, the defrosting effect is good, the situation that the lower portion of the outdoor heat exchanger can also be defrosted is guaranteed, and the phenomenon that due to the fact that a water hole is blocked by ice, the potential safety hazard is caused cannot happen.
Description
Technical field
The present invention relates to refrigerating field, especially relate to a kind of off-premises station of two-pipe heat recovery system and there is its two-pipe heat recovery system.
Background technology
Along with the development of air-conditioning technical and the reinforcement of people's environmental protection concept, heat-reclamation multi-compressors systems grow is subject to the welcome in market.Two-pipe heat recovery system is a kind of in main flow heat-reclamation multi-compressors system in the market.It is made up of off-premises station, part flow arrangement MS and indoor set three parts.It can realize cooling and warming simultaneously, when off-premises station run heat or main heating mode time, the reduction due to environment temperature may cause outer machine heat exchanger frosting, and frosting can have a strong impact on heat transfer effect, so in order to ensure system safe, normally run, system must run defrost operating mode.
For the refrigerant pipeline of outdoor unit heat exchanger, the layout of current main flow adopts single loop passage, namely only has a passage passing in and out outdoor unit heat exchanger.The advantage of this method is that manufacture is simple and convenient, and shortcoming is that in heat exchanger, pressure increase is slow because heat exchange volume is large, defrost weak effect, the defrost time is long and cold water after outer wall defrost is dirty, makes condenser heat transfer effect not good, causes overall defrost effect low; Simultaneously when defrost because cold water is dirty and bottom heat transfer effect is poor, cause cold water to flow to chassis accumulation and the situation that secondary freezes can occur, block water hole, and if ice can not melt in time and can tie thicker and thicker, the safe operation of influential system.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, the present invention proposes a kind of off-premises station of two-pipe heat recovery system, and the defrost time is short, and defrost is effective, ensures that the bottom of outdoor heat exchanger also can defrost, can not cause potential safety hazard because of icing blocking water hole.
The present invention also proposes a kind of two-pipe heat recovery system with above-mentioned off-premises station.
According to the off-premises station of the two-pipe heat recovery system of the embodiment of the present invention, described off-premises station has first interface and the second interface, and described off-premises station comprises: compressor, and described compressor has exhaust outlet and gas returning port, commutation assembly, described commutation assembly has first to fourth valve port, and described first valve port is connected with described exhaust outlet, and described second valve port is connected with described gas returning port, and described 3rd valve port is connected with described first interface, outdoor heat exchanger, described outdoor heat exchanger comprises multiple first heat exchanger channels and second heat exchanger channels, described multiple first heat exchanger channels is arranged in order in the vertical direction, described second heat exchanger channels is positioned at the below of described multiple first heat exchanger channels, each described first heat exchanger channels is connected with described second interface with described 4th valve port respectively, the first control valve for controlling stream break-make is all in series with between each described first heat exchanger channels and described 4th valve port, described second heat exchanger channels is connected with described second interface with described exhaust outlet respectively, the second control valve for controlling stream break-make is in series with between described second heat exchanger channels and described exhaust outlet.
According to the off-premises station of the two-pipe heat recovery system of the embodiment of the present invention, the defrost time is short, and defrost is effective, ensures that the bottom of outdoor heat exchanger also can defrost, can not cause potential safety hazard because of icing blocking water hole.
In specific embodiments more of the present invention, described first heat exchanger channels is three, the exchange capability of heat being wherein positioned at described first heat exchanger channels of the top accounts for 50% of the exchange capability of heat of whole described outdoor heat exchanger, and the exchange capability of heat being positioned at two described first heat exchanger channels of below accounts for 30% and 20% of the exchange capability of heat of whole described outdoor heat exchanger respectively.
Further, when described outdoor heat exchanger defrosting, first control to be positioned at the described first control valve unlatching that described first heat exchanger channels of the top is corresponding, described first control valve that two described first heat exchanger channels below control is afterwards positioned at are corresponding is opened.
Particularly, be in series with between each described first heat exchanger channels and described second interface from described first heat exchanger channels to the first check valve of one-way conduction on the direction of described second interface.
Alternatively, described first control valve and described second control valve are respectively magnetic valve.
In some embodiments of the invention, off-premises station also comprises oil eliminator, and described oil eliminator comprises the first entrance, refrigerant exit and oil export, and described first entrance is connected with described exhaust outlet, described refrigerant exit is connected with described first valve port, and described oil export is connected with described gas returning port.
In some embodiments of the invention, off-premises station also comprises gas-liquid separator, and described gas-liquid separator comprises the second entrance and gas vent, and described second entrance is connected with described second valve port, and described gas vent is connected with described gas returning port.
Preferably, described commutation assembly is cross valve.
In further embodiment of the present invention, off-premises station also comprises air supply passage, and the two ends of described air supply passage are connected with described second interface with described exhaust outlet respectively, described air supply passage is in series with the 3rd control valve for controlling refrigerant circulation or cut-off.
According to the two-pipe heat recovery system of the embodiment of the present invention, comprise the off-premises station of two-pipe heat recovery system according to the above embodiment of the present invention.
According to the two-pipe heat recovery system of the embodiment of the present invention, by being provided with above-mentioned off-premises station, thus the defrost time is short, and defrost is effective, ensures that the bottom of outdoor heat exchanger also can defrost, can not cause potential safety hazard because of icing blocking water hole.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the two-pipe heat recovery system according to the embodiment of the present invention;
Fig. 2 is the outdoor heat exchanger in the two-pipe heat recovery system shown in Fig. 1, the assembling schematic diagram of current divider, multiple first control valve, multiple first check valve and the second control valve.
Reference numeral:
Off-premises station 1000,
First interface 130, second interface 140,
Compressor 10, exhaust outlet a, gas returning port b,
Commutation assembly 20, first valve port c, the second valve port d, the 3rd valve port e, the 4th valve port f,
Outdoor heat exchanger 30, first heat exchanger channels 301, second heat exchanger channels 302, second check valve 401, the 3rd check valve 402, the 4th check valve 403, the 5th check valve 404, the 6th check valve 405, the 7th check valve 406,
First control valve 50, first check valve 60, second control valve 70, current divider 80, main entrance g, diffluence pass h, air supply passage 90, the 3rd control valve 100, oil eliminator 110, first entrance i, refrigerant exit j, oil export k, gas-liquid separator 120, second entrance l, gas vent m.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The off-premises station 1000 according to the two-pipe heat recovery system of the embodiment of the present invention is described in detail below with reference to Fig. 1 and Fig. 2, off-premises station 1000 has first interface 130 and the second interface 140, and off-premises station 1000 becomes two-pipe heat recovery system with part flow arrangement with the common assembly of multiple indoor set with the second interface 140 by first interface 130.
According to the off-premises station 1000 of the two-pipe heat recovery system of the embodiment of the present invention, comprising: compressor 10, commutation assembly 20 and outdoor heat exchanger 30.Wherein, compressor 10 has exhaust outlet a and gas returning port b, needs to be described, and the structure of compressor 10 and operation principle etc. are prior art, are just not described in detail here.
Commutation assembly 20 has first to fourth valve port c-f, wherein the first valve port c is communicated with one of them in the 4th valve port f with the 3rd valve port e, second valve port d and the 3rd valve port e are communicated with another in the 4th valve port f, that is, when the first valve port c is communicated with the 3rd valve port e, then the second valve port d is communicated with the 4th valve port f, and when the first valve port c is communicated with the 4th valve port f, then the second valve port d is communicated with the 3rd valve port e.Preferably, commutation assembly 20 is cross valve, but is understandable that, commutation assembly 20 can also be formed as other structures, as long as have first to fourth valve port c-f and have commutation function.
First valve port c is connected with exhaust outlet a, and the second valve port d is connected with gas returning port b, and the 3rd valve port e is connected with first interface 130, and the first end of outdoor heat exchanger 30 is connected with the 4th valve port f, and the second end of outdoor heat exchanger 30 is connected with the second interface 140.Be understandable that, off-premises station 1000 can also comprise for the blower fan by wind guide chamber external heat exchanger 30, to accelerate the heat exchange efficiency of outdoor heat exchanger 30.
Outdoor heat exchanger 30 comprises multiple first heat exchanger channels 301 and second heat exchanger channels 302, multiple first heat exchanger channels 301 is arranged in order in the vertical direction, second heat exchanger channels 302 is positioned at the below of multiple first heat exchanger channels 301, that is, the second heat exchanger channels 302 is positioned at the bottom of outdoor heat exchanger 30.
Each first heat exchanger channels 301 is connected with the second interface 140 with the 4th valve port f respectively, the first control valve 50 for controlling stream break-make is all in series with between each first heat exchanger channels 301 and the 4th valve port f, in other words, the service condition of each first heat exchanger channels 301 is controlled by corresponding first control valve 50, and the service condition of each first heat exchanger channels 301 is uncorrelated mutually with the service condition of remaining the first heat exchanger channels 301.Thus by controlling the running status of multiple first control valve 50, the service condition of multiple first heat exchanger channels 301 can be controlled, to select the use number of the first heat exchanger channels 301 as required.Alternatively, the first control valve 50 is magnetic valve.
Second heat exchanger channels 302 is connected with the second interface 140 with exhaust outlet a respectively, is in series with the second control valve 70 for controlling stream break-make between the second heat exchanger channels 302 and exhaust outlet a.That is, second control valve 70 controls the service condition of the second heat exchanger channels 302, when the second control valve 70 is opened, the refrigerant of the HTHP of discharging from the exhaust outlet a of compressor 10 is directly drained in the second heat exchanger channels 302 from exhaust outlet a, and the refrigerant after heat exchange is directly drained in the second interface 140.Alternatively, the second control valve 70 is magnetic valve.
Specifically, when needs defrost to outdoor heat exchanger 30, first the first control valve 50 of the first heat exchanger channels 301 correspondence being positioned at the top can be opened, from compressor 10 discharge refrigerant enter into be positioned at the top the first heat exchanger channels 301 to defrost to the topmost of outdoor heat exchanger 30, open the first control valve 50 of the first heat exchanger channels 301 correspondence being positioned at the second height afterwards, the part of the outdoor heat exchanger 30 of the first heat exchanger channels 301 correspondence of the second height is defrosted, by parity of reasoning, the first control valve 50 is opened successively according to direction from top to bottom, multiple parts separately defrosting (first up and then down) of the outdoor heat exchanger 30 of multiple first heat exchanger channels 301 correspondence.
Simultaneously in the process defrosted to outdoor heat exchanger 30, the second control valve 70 is in opening all the time, and the refrigerant of the HTHP of discharging from the exhaust outlet a of compressor 10 flow into the second heat exchanger channels 302 being positioned at bottom all the time.
Therefore known, due to the separately defrosting adopting multiple first heat exchanger channels 301 first up and then down, the currency of refrigerant in outdoor heat exchanger 30 shortens, improve the defrosting effect of the every part to outdoor heat exchanger 30, the defrost time is reduced greatly, the Temperature Distribution simultaneously entering into the refrigerant of outdoor heat exchanger 30 is also more even, all can defrost in each position of outdoor heat exchanger 30, defrost is effective, solve monoblock outdoor heat exchanger 30 together defrost time defrost time long, the white difficultyization in bottom a difficult problem.
And owing to being provided with the second heat exchanger channels 302 being positioned at bottom, when the cold water after defrost is dirty, heated by the refrigerant of the HTHP in the second heat exchanger channels 302 in the bottom of outdoor heat exchanger 30, aqueous water after defrost is directly spilt from the water hole the chassis be positioned at below outdoor heat exchanger 30, and potential safety hazard can not be caused because of icing blocking water hole.
In brief, according to the off-premises station 1000 of the two-pipe heat recovery system of the embodiment of the present invention, the defrost time is short, and defrost is effective, ensures that the bottom of outdoor heat exchanger 30 also can defrost, can not cause potential safety hazard because of icing blocking water hole.
In a particular embodiment of the present invention, first heat exchanger channels 301 is three, the exchange capability of heat being wherein positioned at the first heat exchanger channels 301 of the top accounts for 50% of the exchange capability of heat of whole outdoor heat exchanger 30, and the exchange capability of heat being positioned at two the first heat exchanger channels 301 of below accounts for 30% and 20% of the exchange capability of heat of whole outdoor heat exchanger 30 respectively.Thus take into account Smaller load demand and simplification system.
Further, in order to shorten the defrost time, when outdoor heat exchanger 30 defrosts, the first control valve 50 first controlling to be positioned at the first heat exchanger channels 301 correspondence of the top is opened, and the first control valve 50 controlling two the first heat exchanger channels 301 correspondences being positioned at below is afterwards opened.That is, defrost at twice, first top (50%) defrost, (30%+20%) defrost under in rear.
Further, off-premises station 1000 can comprise multiple temperature-detecting device, multiple temperature-detecting device is used for the temperature in the exit of multiple first heat exchanger channels 301 of sensing chamber's external heat exchanger 30, and the Control Component of off-premises station 1000 can control the aperture of corresponding first control valve 50 according to the testing result of each temperature-detecting device.
In some embodiments of the invention, as depicted in figs. 1 and 2, off-premises station 1000 also comprises current divider 80, and current divider 80 comprises main entrance g and multiple diffluence pass h, main entrance g is connected with the 4th valve port f, and multiple diffluence pass h is connected correspondingly with multiple first control valve 50 respectively.Thus be convenient to multiple first control valve 50 to be connected with the 4th valve port f, the structure of off-premises station 1000 can be simplified, reduce the assembly difficulty of off-premises station 1000.
As depicted in figs. 1 and 2, in some embodiments of the invention, the first check valve 60 of one-way conduction on the direction from the first heat exchanger channels 301 to the second interface 140 is in series with between each first heat exchanger channels 301 and the second interface 140.Thus by being provided with the first check valve 60, refrigerant return to the first heat exchanger channels 301 can be avoided, the operational reliability of off-premises station 1000 can be improved.
As shown in Figure 1, in specific embodiments more of the present invention, off-premises station 1000 also comprises oil eliminator 110, oil eliminator 110 comprises the first entrance i, refrigerant exit j and oil export k, first entrance i is connected with exhaust outlet a, refrigerant exit j is connected with the first valve port c, and oil export k is connected with gas returning port b.Thus by being in series with oil eliminator 110 between compressor 10 and the first valve port c, enter into oil eliminator 110 from the refrigerant being mixed with lubricating oil of exhaust outlet a discharge to be separated, the lubricating oil separated is expelled back in compressor 10 by oil export k and gas returning port b, the refrigerant separated enters commutation assembly 20 from refrigerant exit j, and then the lubricating oil of discharging compressor 10 can be recycled, avoid compressor 10 to break down because oil starvation runs, improve the operational reliability of off-premises station 1000.
In some embodiments of the invention, as shown in Figure 1, off-premises station 1000 also comprises gas-liquid separator 120, and gas-liquid separator 120 comprises the second entrance l and gas vent m, and the second entrance l is connected with the second valve port d, and gas vent m is connected with gas returning port b.Thus by being provided with gas-liquid separator 120, enter into gas-liquid separator 120 from the refrigerant of the second valve port d discharge and carry out gas-liquid separation, the gaseous coolant separated is drained into compressor 10 from gas vent m, can avoid compressor 10 that liquid hit phenomenon occurs, improve the operational reliability of off-premises station 1000.
According to some embodiments of the present invention, as shown in Figure 1, off-premises station 1000 also comprises air supply passage 90, and the two ends of air supply passage 90 are connected with the second interface 140 with exhaust outlet a respectively, air supply passage 90 is in series with the 3rd control valve 100 for controlling refrigerant circulation or cut-off.Alternatively, the 3rd control valve 100 is magnetic valve.
Thus when opening the 3rd control valve 100, the refrigerant of discharging from the exhaust outlet a of compressor 10 directly can flow to the second interface 140 to discharge off-premises station 1000.Therefore when the demand hour of two-pipe heat recovery system, can by closedown first control valve 50 and Close All outdoor heat exchanger 30, the refrigerant of now discharging from the exhaust outlet a of compressor 10 only flows to the second interface 140 by the 3rd control valve 100, meets less ability need by regulating the aperture of the 3rd control valve 100.
Simultaneously by being provided with air supply passage 90, suitable gaseous coolant can be supplemented to heating indoor set by the adjustment of the 3rd control valve 100.
Below with reference to Fig. 1 and Fig. 2, the two-pipe heat recovery system according to the specific embodiment of the invention is described in detail.
Two-pipe heat recovery system has pure refrigeration mode, main refrigeration mode, main heating mode and pure heating mode, and the indoor set that pure refrigeration mode refers to operation all carries out refrigeration mode; The indoor set that pure heating mode refers to operation all carries out heating mode; Main refrigeration mode refers to a part of indoor set to carry out freezing and a part of indoor set heats, and cooling load is greater than heating load, and outdoor heat exchanger makees condenser; Main heating mode refers to a part of indoor set and heats and a part of indoor set refrigeration, and heating load is greater than cooling load, and outdoor heat exchanger makees evaporimeter.
As shown in Figure 1, off-premises station 1000 comprises compressor 10, cross valve 20, first check valve 60 to the 7th check valve 406, outdoor heat exchanger 30, multiple first control valve 50, second control valve 70, air supply passage 90, the 3rd control valve 100, current divider 80, oil eliminator 110, gas-liquid separator 120, first interface 130 and the second interface 140.
Each check valve has conduction terminal and cut-off end, each check valve from conduction terminal to cut-off end direction on one-way conduction, that is, refrigerant can only enter in check valve from conduction terminal, and flow out from the cut-off end of check valve, refrigerant cannot enter in check valve from cut-off end, thus check valve can play the effect of one-way conduction.
Wherein cross valve 20 has the first valve port c to the 4th valve port f, the exhaust outlet a of compressor 10 is connected with the first entrance i of oil eliminator 110, the refrigerant exit j of oil eliminator 110 is connected with the first valve port c, the oil export k of oil eliminator 110 is connected with gas returning port b, second entrance l of gas-liquid separator 120 is connected with the second valve port d, and the gas vent m of gas-liquid separator 120 is connected with the gas returning port b of compressor 10.3rd valve port e is connected with first interface 130, and the main entrance g of current divider 80 is connected with the 4th valve port f, is in series with between the second check valve the 401, three valve port e and first interface 130 and is in series with the 3rd check valve 402 between the main entrance g of current divider 80 and the 4th valve port f.
Outdoor heat exchanger 30 comprises multiple first heat exchanger channels 301 and second heat exchanger channels 302, second heat exchanger channels 302 is positioned at the below of multiple first heat exchanger channels 301, multiple diffluence pass h of current divider 80 are connected with the first end of multiple first heat exchanger channels 301 respectively, are in series with the first control valve 50 between each first heat exchanger channels 301 and a corresponding diffluence pass h.Second heat exchanger channels 302 is connected with the refrigerant exit j of oil eliminator 110 by the second control valve 70, and the second heat exchanger channels 302 is also connected with the second interface 140.
Second end of each first heat exchanger channels 301 is connected with first check valve 60, and multiple first check valve 60 is connected with the 5th check valve 404 respectively, and the 5th check valve 404 is also connected with the second interface 140.
The cut-off end of the 4th check valve 403 is connected with the main entrance g of current divider 80, the conduction terminal of the 4th check valve 403 is connected between the 3rd check valve 402 and first interface 130, the conduction terminal of the 6th check valve 405 is connected between the 3rd check valve 402 and the 3rd valve port e, and the cut-off end of the 6th check valve 405 is connected between the 5th check valve 404 and the second interface 140.
The conduction terminal of the 7th check valve 406 is connected with multiple first check valve 60, and the cut-off end of the 7th check valve 406 is connected with the 4th valve port f.
The two ends of air supply passage 90 are connected with the second interface 140 with the refrigerant exit j of oil eliminator 110 respectively, and the 3rd control valve 100 is connected on air supply passage 90 for controlling opening or closing of air supply passage 90.
Off-premises station 1000 has two kinds of patterns: when two-pipe heat recovery system is in pure refrigeration mode, off-premises station 1000 runs the first pattern.When two-pipe heat recovery system is in pure heating mode, off-premises station 1000 runs the second pattern.When multiple indoor set carries out refrigeration mode and heating mode simultaneously, off-premises station 1000 judges according to system, runs the first pattern or the second pattern.
When off-premises station 1000 runs the first pattern, the first valve port c of cross valve 20 is communicated with the 4th valve port f and the second valve port d is communicated with the 3rd valve port e, and the second control valve 70 is closed, and multiple first control valve 50 is according to control and regulation.Refrigerant flows to: compressor 10---oil eliminator 110---cross valve 20---the second check valve 401---current divider 80---the first heat exchanger channels 301 of outdoor heat exchanger 30---the first check valve 60---the 5th check valve 404---the second interface 140---part flow arrangement---indoor set---first interface 130---the 3rd check valve 402---cross valve 20---gas-liquid separator 120---compressor 10.
Wherein in the first pattern, when two-pipe heat recovery system is in pure refrigeration mode, the 3rd control valve 100 is in closed condition.When two-pipe heat recovery system is in main refrigeration mode, 3rd control valve 100 also can need to open according to control, what flow through from the 3rd control valve 100 is gaseous coolant, the mainly liquid refrigerants that flows through of heat exchanger 30 outdoor, both gas-liquid separations in part flow arrangement, gaseous coolant goes to heat indoor set, and liquid refrigerants removes the indoor set that freezes, also removing from heating indoor set liquid refrigerants out the indoor set that freezes, after evaporation, returning off-premises station.In brief, when the 3rd control valve 100 is opened, suitable gaseous coolant can be supplemented to heating in indoor set, to play the effect of tonifying Qi.
When off-premises station 1000 runs the second pattern, first valve port c of cross valve 20 is communicated with the 3rd valve port e and the second valve port d is communicated with the 4th valve port f, 3rd control valve 100 is opened, second control valve 70 is closed, multiple first control valve 50 is according to control and regulation, the refrigerant of discharging from compressor 10 enters into oil eliminator 110, and the high pressure gaseous refrigerant of discharging from the refrigerant exit j of oil eliminator 110 is drained into part flow arrangement by cross valve 20, the 6th check valve 405 and the second interface 140.
When two-pipe heat recovery system is pure heating mode, refrigerant flows to and is: part flow arrangement---indoor set---first interface 130---the 4th check valve 403---multiple first heat exchanger channels 301 of outdoor heat exchanger 30---the first check valve 60---the 7th check valve 406---cross valve 20---gas-liquid separator 120---compressor 10.
When two-pipe heat recovery system is main heating mode, the high pressure gaseous refrigerant that off-premises station 1000 is discharged first goes to through part flow arrangement and heats the liquid refrigerants that indoor set is condensed into HTHP, then two-way is divided, a part goes the evaporation of refrigeration indoor set, part throttling in part flow arrangement, then two-way converges and gets back to outdoor unit heat exchanger 30 and evaporate, and then gets back to compressor 10.
Wherein when outdoor heat exchanger 30 carries out in the process defrosted, second control valve 70 is opened, directly enter in the second heat exchanger channels 302 from the gaseous coolant of the HTHP of compressor 10 discharge and the cold water that defrost produces is heated, to avoid the water hole blocking chassis because of water freezing.
Wherein the first check valve 60 not only plays the effect of separated flow passages to the 7th check valve 406, can also guarantee that off-premises station 1000 refrigerant enters into part flow arrangement by the second interface 140.
Outdoor heat exchanger 30 can pass through multiple first control valve 50 of break-make, the volume of conditioning chamber external heat exchanger 30, coordinates compressor 10, blower fan and part flow arrangement to regulate the refrigerant state of the second interface 140.
The piecemeal of multiple first heat exchanger channels 301 of outdoor heat exchanger 30 controls to realize different ability need simultaneously, and multiple first heat exchanger channels 301 uses simultaneously and meets large ability need, only has first heat exchanger channels 301 to use and meets little ability need.When less ability need by closing multiple first control valve 50, the first whole heat exchanger channels 301 can being closed, by regulating the 3rd control valve 100 to meet less ability need, thus lower cryogenic refrigeration scope can be reached.
Simultaneously as above-mentioned known, when to there is the indoor set of refrigeration and heating mode demand simultaneously, no matter off-premises station 1000 is the first pattern or the second pattern, two-pipe heat recovery system is when main refrigeration mode, off-premises station all exports the refrigerant of gas-liquid mixed state in part flow arrangement, carry out gas-liquid separation by part flow arrangement, overheated gaseous coolant enters mechanism heat in heating chamber, and supercooled liquid refrigerant enters mechanism cold in cool room.Two-pipe heat recovery system is when pure heating mode or main heating mode, and the refrigerant that machine exports outdoor is the gaseous coolant of HTHP.Two-pipe heat recovery system is when pure refrigeration mode, and what off-premises station exported is liquid refrigerants.Second to the 7th check valve 401-406 not only plays separated flow passages effect, can also guarantee that the refrigerant of off-premises station 1000 enters into part flow arrangement by the second interface 140.
According to the off-premises station 1000 of the two-pipe heat recovery system of the embodiment of the present invention, by being provided with the second check valve 401 to the 7th check valve 406, coordinate the commutation effect of commutation assembly 20 simultaneously, can ensure that the refrigerant in off-premises station 1000 all flows to part flow arrangement from the second interface 140, the refrigerant that machine flows out indoor all flows back to off-premises station 1000 from first interface 130, thus no matter which kind of pattern is two-pipe heat recovery system run, the refrigerant of off-premises station 1000 all exports from the same side, the functional requirement that two-pipe heat recovery system heats simultaneously and freezes can not only be met, and control simple, the refrigerant flow of off-premises station 1000 is simple.
According to the two-pipe heat recovery system of the embodiment of the present invention, comprise the off-premises station according to the above embodiment of the present invention two-pipe heat recovery system.
According to the two-pipe heat recovery system of the embodiment of the present invention, by being provided with above-mentioned off-premises station, thus the defrost time is short, and defrost is effective, ensures that the bottom of outdoor heat exchanger 30 also can defrost, can not cause potential safety hazard because of icing blocking water hole.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. an off-premises station for two-pipe heat recovery system, is characterized in that, described off-premises station has first interface and the second interface, and described off-premises station comprises:
Compressor, described compressor has exhaust outlet and gas returning port;
Commutation assembly, described commutation assembly has first to fourth valve port, and described first valve port is connected with described exhaust outlet, and described second valve port is connected with described gas returning port, and described 3rd valve port is connected with described first interface;
Outdoor heat exchanger, described outdoor heat exchanger comprises multiple first heat exchanger channels and second heat exchanger channels, described multiple first heat exchanger channels is arranged in order in the vertical direction, described second heat exchanger channels is positioned at the below of described multiple first heat exchanger channels, each described first heat exchanger channels is connected with described second interface with described 4th valve port respectively, the first control valve for controlling stream break-make is all in series with between each described first heat exchanger channels and described 4th valve port, described second heat exchanger channels is connected with described second interface with described exhaust outlet respectively, the second control valve for controlling stream break-make is in series with between described second heat exchanger channels and described exhaust outlet.
2. the off-premises station of two-pipe heat recovery system according to claim 1, it is characterized in that, described first heat exchanger channels is three, the exchange capability of heat being wherein positioned at described first heat exchanger channels of the top accounts for 50% of the exchange capability of heat of whole described outdoor heat exchanger, and the exchange capability of heat being positioned at two described first heat exchanger channels of below accounts for 30% and 20% of the exchange capability of heat of whole described outdoor heat exchanger respectively.
3. the off-premises station of two-pipe heat recovery system according to claim 2, it is characterized in that, when described outdoor heat exchanger defrosting, first control to be positioned at the described first control valve unlatching that described first heat exchanger channels of the top is corresponding, control to be positioned at the described first control valve unlatching that two described first heat exchanger channels of below are corresponding afterwards.
4. the off-premises station of two-pipe heat recovery system according to claim 1, it is characterized in that, be in series with from described first heat exchanger channels to the first check valve of one-way conduction on the direction of described second interface between each described first heat exchanger channels and described second interface.
5. the off-premises station of two-pipe heat recovery system according to claim 1, is characterized in that, described first control valve and described second control valve are respectively magnetic valve.
6. the off-premises station of two-pipe heat recovery system according to claim 1, it is characterized in that, also comprise oil eliminator, described oil eliminator comprises the first entrance, refrigerant exit and oil export, described first entrance is connected with described exhaust outlet, described refrigerant exit is connected with described first valve port, and described oil export is connected with described gas returning port.
7. the off-premises station of two-pipe heat recovery system according to claim 1, it is characterized in that, also comprise gas-liquid separator, described gas-liquid separator comprises the second entrance and gas vent, described second entrance is connected with described second valve port, and described gas vent is connected with described gas returning port.
8. the off-premises station of two-pipe heat recovery system according to claim 1, is characterized in that, described commutation assembly is cross valve.
9. the off-premises station of the two-pipe heat recovery system according to any one of claim 1-8, it is characterized in that, also comprise air supply passage, the two ends of described air supply passage are connected with described second interface with described exhaust outlet respectively, described air supply passage are in series with the 3rd control valve for controlling refrigerant circulation or cut-off.
10. a two-pipe heat recovery system, is characterized in that, comprises the off-premises station of the two-pipe heat recovery system according to any one of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510151357.4A CN104930600B (en) | 2015-03-31 | 2015-03-31 | The outdoor unit of two-pipe heat recovery system and there is its two-pipe heat recovery system |
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| CN201510151357.4A CN104930600B (en) | 2015-03-31 | 2015-03-31 | The outdoor unit of two-pipe heat recovery system and there is its two-pipe heat recovery system |
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| CN104930600B CN104930600B (en) | 2018-01-02 |
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| CN104930600B (en) | 2018-01-02 |
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