CN104776657A - Defrosting device, defrosting method and air conditioner provided with defrosting device - Google Patents
Defrosting device, defrosting method and air conditioner provided with defrosting device Download PDFInfo
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- CN104776657A CN104776657A CN201410012460.6A CN201410012460A CN104776657A CN 104776657 A CN104776657 A CN 104776657A CN 201410012460 A CN201410012460 A CN 201410012460A CN 104776657 A CN104776657 A CN 104776657A
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- heat exchanger
- defrost
- controlled valve
- outdoor heat
- defrosting
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a defrosting device, a defrosting method and an air conditioner provided with the defrosting device. A way of a first defrosting pipe is additionally arranged on a conveying pipe between indoor and outdoor heat exchangers; one end of the first defrosting pipe is communicated with the outdoor heat exchanger, and the other end is communicated with a conveying pipe at the front end of a heating flow direction throttling element; and a first controlled valve is arranged on the first defrosting pipe. The device uses one part of refrigerant in an outlet of the indoor heat exchanger for defrosting without being stopped, so that the continuous heating can be realized, the energy is not wasted, and the defrosting can be realized by only using a small part of heat; high-temperature and high-pressure refrigerant in an outlet of a compressor still passes through the indoor heat exchanger preferentially to guarantee no drop of the indoor heating temperature; and when the heating quantity of the air conditioner is effectively guaranteed, the indoor comfort of the air conditioner is greatly enhanced to achieve the undesirable effect. The device can finish the defrosting action under the condition of no stop, and can effectively prevent the outdoor heat exchanger from being defrosted by defrosting when detecting the frost of the outdoor heat exchanger.
Description
Technical field
The invention belongs to field of air conditioning, specifically belong to air-conditioner defrosting field.
Background technology
Existing air-conditioner defrosting, under the state of low-temperature heating, heating a period of time, when outdoor heat exchanger amasss frost, the high temperature heat produced by compressor by switching cross valve is sent into outdoor heat exchanger and is defrosted, now indoor needs stop heating, and therefore indoor temperature declines obviously, can bring sense of discomfort clearly to people.Further, adopt the method to air-conditioning defrost, during defrost, compressor is in running order, not only can not produce and heat, but also needs to consume certain electric energy, have impact on air-conditioning COP value.For current existing technology, to shut down, not obvious minimizing comfort level and problem or a technical barrier of air-conditioning COP value can also be improved.
Therefore, need badly and a kind ofly can not shut down defrosting and not waste defroster and the method for efficient heat.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, providing a kind of defroster and Defrost method and the air-conditioning of this defroster is housed, COP value when the present invention effectively can improve heating of air-conditioning simultaneously and comfortableness, achieve unexpected effect.
The technical solution adopted in the present invention is: a kind of defroster; defrosting is not shut down for air-conditioning; conveyance conduit between connection internal-external heat exchanger device increases and is provided with a road first defrost pipeline; one end communication chamber external heat exchanger of above-mentioned first defrost pipeline; other end connection heats the conveyance conduit flowing to restricting element front end, and above-mentioned first defrost pipeline is provided with the first Controlled valve.
Preferably, be also provided with flow distributor in above-mentioned first defrost pipeline, above-mentioned flow distributor is located between above-mentioned first Controlled valve and above-mentioned outdoor heat exchanger.
Preferably, above-mentioned first defrost pipeline is arranged in parallel at least one road second defrost pipeline, the above-mentioned outdoor heat exchanger of above-mentioned second defrost pipeline communication, above-mentioned second defrost pipeline is provided with the second Controlled valve.
Preferably, be also provided with flow distributor in above-mentioned second defrost pipeline, above-mentioned flow distributor is located between above-mentioned second Controlled valve and above-mentioned outdoor heat exchanger.
Preferably, above-mentioned flow distributor adopts electric expansion valve flow controller or capillary restrictor or nozzle restrictor.
Preferably, the pipe temperature sensor for sensing chamber's external heat exchanger temperature is also provided with.
Another kind of technical scheme of the present invention is: a kind of idle call does not shut down Defrost method, adopts defroster according to claim 1, comprises the following steps: the temperature 1) gathering outdoor heat exchanger and outdoor environment; 2) according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation; If enter Defrost operation, then carry out step 3, otherwise carry out step 1; 3) control described first Controlled valve to open, defrost, air-conditioning heating runs simultaneously; 4) judge whether outdoor heat exchanger meets and exit defrosting condition, if meet, perform step 5, otherwise perform step 3; 5) close the first Controlled valve, air conditioner carries out conventional heating operation.
Preferably, in above-mentioned steps 3, also control above-mentioned second Controlled valve and open, in above-mentioned steps 5, also close above-mentioned second Controlled valve.
Preferably, in described step 3), control described first Controlled valve or/and the second Controlled valve opens and closes the time, namely control air-conditioner operation time and the defrost time is respectively 1 ∽ 40 minutes and 1 ∽ 2 minutes.
Another kind of technical scheme of the present invention is: a kind of air-conditioning with not shutting down defroster, increases and be provided with above-mentioned defroster between the outdoor heat exchanger and indoor heat exchanger of air-conditioning.
The beneficial effect of the technical program is adopted to be: the part of refrigerant waste heat that indoor heat exchanger is exported by the first Controlled valve by the present invention and outdoor heat exchanger are connected, and defrost.Without the need to shutting down; continuous print can be realized heat; effectively can also improve air-conditioning COP value simultaneously; and only need sub-fraction heat just can reach the effect of defrosting; the cold-producing medium of the HTHP of compressor outlet still preferentially by indoor heat exchanger, thus ensures that indoor heating temperature does not decline substantially, effectively ensures heating capacity; and the comfort level that greatly strengthen in air conditioning chamber, achieves unexpected effect.Adopt the Defrost method of this device; defrosting action can be completed in non-stop-machine situation; solving the technical barrier that this area can not effectively solve for a long time, when once detecting that outdoor heat exchanger carries out defrosting action when having white, can effectively stop outdoor heat exchanger frosting.
Accompanying drawing explanation
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein:
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2;
Fig. 3 is the structural representation of the embodiment of the present invention 3;
Fig. 4 is the structural representation of the embodiment of the present invention 4;
Fig. 5 is the structural representation of the embodiment of the present invention 5;
Fig. 6 is the structural representation of the embodiment of the present invention 6;
Fig. 7 is the structural representation of the embodiment of the present invention 7;
Fig. 8 is that the embodiment of the present invention 2 tests 1 low-temperature heating air conditioner leaving air temp curve map in time;
Fig. 9 is that the embodiment of the present invention 2 tests 2 low-temperature heating air conditioner leaving air temps curve map in time;
Figure 10 is that the embodiment of the present invention 2 tests 3 low-temperature heating air conditioner leaving air temps curve map in time;
Figure 11 is that the embodiment of the present invention 2 tests 4 low-temperature heating air conditioner leaving air temps curve map in time;
Figure 12 is that the embodiment of the present invention 2 tests 5 low-temperature heating air conditioner leaving air temps curve map in time;
Figure 13 is that the embodiment of the present invention 2 tests 6 low-temperature heating air conditioner leaving air temps curve map in time;
Figure 14 is existing air-conditioning experiment low-temperature heating air conditioner leaving air temp curve map in time.
Diagram, 1. 2 compressor four-way reversing valve (3) heating when the outdoor heat exchanger exit 4. 5. Outdoor heat exchanger outside ring temperature sensor is 61. The outdoor heat exchanger with the first point of frost line 62. The outdoor heat exchanger and the second point of frost line 63. The outdoor heat exchanger and the third point of frost line 64. The outdoor heat exchanger and the fourth point of frost line 65. The outdoor heat exchanger and the fifth point of frost line 7. 8. Outdoor pipe temperature sensor for the first frost pipe line between the entrance and the first control valve
Detailed description of the invention
Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, for being equipped with the air-conditioning equipment of defroster, solid arrow is refrigerant flow direction during refrigeration, refrigerant flow direction when dotted arrow is for heating, and it is implemented as: compressor 1, and compressor 1 is by low temperature low pressure gas boil down to high temperature and high pressure gas; Four-way change-over valve 2, for changing the flow direction of gas; Outdoor heat exchanger 4, outdoor heat exchanger 4 is provided with a road conveyance conduit 17 and is connected with indoor heat exchanger 18; Indoor heat exchanger 18, for carrying out heat exchange to the high temperature and high pressure gas after compressor compresses.Between indoor heat exchanger 18 and outdoor heat exchanger 4, be also provided with refrigeration to check valve 10 and restricting element 9 when heating, when freezing to check valve 10 and heat, restricting element 9 is in parallel.Outdoor heat exchanger 4, indoor heat exchanger 18 and compressor 1 are communicated with by four-way change-over valve 2.As shown in FIG., compressor 1, outdoor heat exchanger 4, connected by conveyance conduit between four-way change-over valve 2 and indoor heat exchanger 18.
In order to realize the continuous heating function of not shutting down defrost, between outdoor heat exchanger 4 and indoor heat exchanger 18, flow to the increase of restricting element front end at air-conditioning heating simultaneously and one tunnel first defrost pipeline 14 is set, one end communication chamber external heat exchanger 4 of this first defrost pipeline 14, i.e. the first tie point 61 of communication chamber external heat exchanger and defrost pipeline, the other end is communicated with the first defrost entrance 16 heating the conveyance conduit flowing to restricting element 9 front end when heating, and the first Controlled valve 12 is provided with on the first defrost pipeline, Controlled valve is a kind of on-off valve, defrost flow distributor 11 is also provided with between the first Controlled valve 12 and outdoor heat exchanger 4, flow distributor 11 can realize the distribution of flow by the caliber changing conveyance conduit, in the present embodiment, defrost flow distributor 11 adopts electric expansion valve flow controller, for distributing the cold medium flux of defrost, and can effectively prevent air-conditioning liquid hammer.
When outdoor ring temperature sensor 5 detect meet defrosting condition time, start the first Controlled valve 12, conducting first defrost pipeline 14, cold-producing medium and the outdoor heat exchanger 4 of the part exported by indoor heat exchanger 18 are connected, and the cold-producing medium waste heat of the part exported with indoor heat exchanger 18 defrosts to outdoor heat exchanger 4.
By national standard, low-temperature heating capacity test is carried out to 1 frequency conversion on-hook.Indoor Dry bulb temperature 20 DEG C, outdoor dry-bulb temperature 2 DEG C, under wet-bulb temperature 1 DEG C of condition, adopt the present embodiment to adopt a defrost pipeline not shut down defrost technology, when testing its operation of heat pump, test data is as follows:
By national standard, low-temperature heating capacity test is carried out to 1 frequency conversion on-hook.Indoor Dry bulb temperature 20 DEG C, outdoor dry-bulb temperature 2 DEG C, under wet-bulb temperature 1 DEG C of condition, adopt existing defrost technology, when testing its operation of heat pump, test data is as follows:
From above experimental data, the air-conditioning that this defroster is housed is under condition on year-on-year basis, controlling operation of air conditioner 15 minutes, under the condition of 40 seconds defrost time, defrost effect is best, and leaving air temp fluctuating range is minimum reaches 2.35%, heating capacity reaches maximum and reaches 3735W simultaneously, and under adopting the same operating mode of same model unit of traditional defrost technology, air conditioning exhausting temperature fluctuation amplitude 49.73%, heating capacity 3192W.Adopt the air-conditioner temperature fluctuating range comparing conventional defrost technology in the operation of air conditioner of this defroster greatly to reduce, heating capacity also improves greatly simultaneously, and the COP value of air-conditioning also improves greatly.
Embodiment 2
As shown in Figure 2, all the other are identical with embodiment 1, difference is, because the long-pending white degree of the position that outdoor heat exchanger 4 is different is different, therefore on the first defrost pipeline 14, be arranged in parallel a road Article 1 second defrost pipeline 15, Article 1, one end of the second defrost pipeline 15 branches out an Article 1 second defrost pipeline 15 between the pipeline 8 between the first defrost entrance 16 and the first Controlled valve 12, form the first branch point 25, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, Article 1, the other end of the second defrost pipeline 15 is according to the different entrance of the flow process communication chamber external heat exchanger 4 of outdoor heat exchanger, second tie point 62 of the outdoor heat exchanger namely shown in figure and defrost pipeline.
Article 1, the second defrost pipeline 15 is provided with the second Controlled valve 13.Adopt the second Controlled valve 13 that the cold-producing medium in outdoor heat exchanger 4 effectively can be prevented not according to the flow direction flowing of setting when freezing.Again two-way defrost pipeline access outdoor heat exchanger 4 is carried out defrost, namely indoor heat exchanger 18 export cold-producing medium accessed the first tie point 61 of outdoor heat exchanger and defrost pipeline by first Controlled valve 12, defrost flow distributor 11, second Controlled valve 13 accesses the second tie point 62 of outdoor heat exchanger and defrost pipeline by defrost flow distributor 11, and outdoor heat exchanger is positioned at the different position of outdoor heat exchanger from the first tie point 61 of defrost pipeline and the second tie point 62 of outdoor heat exchanger and defrost pipeline.The flow distributor 11 of defrost in the present embodiment adopts capillary restrictor.The thick part of long-pending frost in indoor heat exchanger 4 is passed into more cold-producing medium waste heat, the few part of long-pending frost in outdoor heat exchanger 4 is passed into less cold-producing medium waste heat defrost, adopt this device, the utilizing waste heat for refrigeration agent of the uniform temperature introduction outdoor heat exchanger 4 that has that indoor heat exchanger 18 can be exported carries out defrost, the frost that outdoor heat exchanger can be amassed the different position of white degree is changed to the greatest extent substantially simultaneously, the waste of the heat avoiding traditional defrost pattern to produce.Now the cold-producing medium of the HTHP of compressor outlet is still heated by indoor heat exchanger 18, thus makes the just slight decline of indoor heating temperature, alleviates the temperature fluctuation that indoor cause because of defrost, air-conditioning is improved greatly in the comfort level of low-temperature heating.
The Defrost method of this defroster is adopted to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively, then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when the outdoor ring temperature dry-bulb temperature 2 DEG C that pipe temperature sensor collects, during Indoor Dry bulb temperature 20 DEG C, when pipe temperature sensor detects Guan Wen≤-2 DEG C, and difference >=4 DEG C of the gentle pipe temperature of outdoor ring, then enter defrost, control the first Controlled valve to open, defrost, simultaneously by capillary restrictor throttling, air-conditioning continues heating operation simultaneously, namely control the first Controlled valve and open 5 seconds, and start flow adaptation device 11 simultaneously, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 5 minutes, air conditioner carries out conventional heating operation.
As shown in figures 8-13, by national standard, low-temperature heating capacity test is carried out to 1 frequency conversion on-hook.Indoor Dry bulb temperature 20 DEG C, outdoor dry-bulb temperature 2 DEG C, under wet-bulb temperature 1 DEG C of condition, adopt the present embodiment to adopt two defrost pipelines not shut down defrost technology, when testing its operation of heat pump, test data is as follows:
As shown in figure 14, by national standard, low-temperature heating capacity test is carried out to 1 frequency conversion on-hook.Indoor Dry bulb temperature 20 DEG C, outdoor dry-bulb temperature 2 DEG C, under wet-bulb temperature 1 DEG C of condition, adopt existing defrost technology, when testing its operation of heat pump, test data is as follows:
From above experimental data, the air-conditioning of this defroster is housed under equivalent environment, controlling operation of air conditioner 15 minutes, under the condition of 40 seconds defrost time, defrost effect is best, leaving air temp fluctuating range is minimum reaches 2.34%, heating capacity reaches maximum and reaches 3740W simultaneously, and under adopting the same operating mode of same model unit of traditional defrost technology, air conditioning exhausting temperature fluctuation amplitude 49.73%, heating capacity 3192W, its average defrost periods is 90 minutes, and along with the huge fluctuation of indoor units leaving air temp, its fluctuating range is more than 16 DEG C, and after defrost and defrost ramp-up time at 90 minutes, account in defrost periods more than 25 minutes.Adopt the air-conditioner temperature fluctuating range comparing conventional defrost technology in the operation of air conditioner of this defroster greatly to reduce, heating capacity also improves greatly simultaneously, and the COP value of air-conditioning also improves greatly.
The air-conditioning that this defroster is housed compares common air-conditioning in the process of defrosting, effectively can ensure the heating capacity of air-conditioning, and substantially increase comfort level, and not wasted heat, only need sub-fraction heat effectively to be removed by the long-pending frost on outdoor heat exchanger of air conditioner clean, therefore substantially increase the COP value of air-conditioning.
Embodiment 3
As shown in Figure 3, all the other are identical with embodiment 2, and difference is, because the long-pending white degree of the different position of outdoor heat exchanger 4 is different, on the first defrost pipeline 14, are therefore arranged in parallel a road Article 1 second defrost pipeline 15.Article 1, one end of the second defrost pipeline 15 is communicated with the first defrost entrance 16 heating the conveyance conduit flowing to restricting element 9 front end when heating, wherein the entrance 16 of the first defrost pipeline can in indoor heat exchanger 18 and any one position heated when the flow direction heats between restricting element 9, the other end according to the different entrance of the flow process communication chamber external heat exchanger 4 of outdoor heat exchanger, the second tie point 62 of the outdoor heat exchanger namely shown in figure and defrost pipeline.The present embodiment is equivalent to set out two defrost pipelines from the first defrost entrance 16 points, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger.
Embodiment 4
As shown in Figure 4, all the other are identical with embodiment 2, and difference is, in outdoor heat exchanger, 4 add two-way second defrost pipeline, are respectively Article 1 second defrost pipeline 15, Article 2 second defrost pipeline 20.Article 1, one end of the second defrost pipeline 15 branches out an Article 1 second defrost pipeline 15 between the first defrost entrance 16 and the first Controlled valve 12, forming the first branch point 25 is and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, and Article 2 second defrost pipeline 20 is from branching out an Article 2 second defrost pipeline 20 between the first branch point 25 and the second Controlled valve 13, form the second branch point 26, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger.
Second defrost pipeline 15 is provided with flow distributor 11 and the second Controlled valve 13, and Article 2 second defrost pipeline 20 is provided with flow distributor 11 and the 3rd Controlled valve 19, and wherein flow distributor 11 adopts nozzle restrictor.
Embodiment 5
As shown in Figure 5, all the other are identical with embodiment 3, and difference is, in outdoor heat exchanger, 4 add two-way second defrost pipeline, are respectively Article 1 second defrost pipeline 15, Article 2 second defrost pipeline 20.One end of two-way second defrost pipeline is communicated with the first defrost entrance 16 heating the conveyance conduit flowing to restricting element 9 front end when heating jointly, the other end respectively according to the different entrance of the flow process communication chamber external heat exchanger 4 of outdoor heat exchanger, the 3rd tie point 63 of the second tie point 62 of the outdoor heat exchanger namely shown in figure and defrost pipeline and outdoor heat exchanger and defrost pipeline.In like manner outdoor heat exchanger is positioned at the different position of outdoor heat exchanger from the second tie point 62 of defrost pipeline and the 3rd tie point 63 of outdoor heat exchanger and defrost pipeline.
Embodiment 6
As shown in Figure 6, all the other are identical with embodiment 4, difference is, four tunnel second defrost pipelines are added in outdoor heat exchanger 4, be respectively Article 1 second defrost pipeline 15, Article 2 second defrost pipeline 20, Article 3 second defrost pipeline 22 and Article 4 second defrost pipeline 24, Article 1, one end of the second defrost pipeline 15 branches out an Article 1 second defrost pipeline 15 between the first defrost entrance 16 and the first Controlled valve 12, form the first branch point 25, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, second tie point 62 of the outdoor heat exchanger namely shown in figure and defrost pipeline, and one end of Article 2 second defrost pipeline 20 is from branching out an Article 2 second defrost pipeline 20 between the first branch point 25 and the second Controlled valve 13, form the second branch point 26, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, second tie point 63 of the outdoor heat exchanger namely shown in figure and defrost pipeline, and by that analogy, one end of Article 3 second defrost pipeline 22 is from branching out one article of Article 3 second defrost pipeline 22 between the second branch point 26 and the 3rd Controlled valve 19, form the 3rd branch point 27, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, second tie point 64 of the outdoor heat exchanger namely shown in figure and defrost pipeline, one end of Article 4 second defrost pipeline 24 is from branching out one article of Article 4 second defrost pipeline 24 between the 3rd branch point 27 and the 4th Controlled valve 21, form the 4th branch point 28, and the different entrance of flow process communication chamber external heat exchanger 4 according to outdoor heat exchanger, the second tie point 65 of the outdoor heat exchanger namely shown in figure and defrost pipeline.
Embodiment 7
As shown in Figure 7, all the other are identical with embodiment 5, difference is, four tunnel second defrost pipelines are added in outdoor heat exchanger 4, be respectively Article 1 second defrost pipeline 15, Article 2 second defrost pipeline 20, Article 3 second defrost pipeline 22 and Article 4 second defrost pipeline 24, wherein, one end of four tunnel second defrost pipelines is communicated with the first defrost entrance 16 heating the conveyance conduit flowing to restricting element 9 front end when heating jointly.The other end is respectively according to the different entrance of the flow process communication chamber external heat exchanger 4 of outdoor heat exchanger, second tie point 62 of the outdoor heat exchanger namely shown in figure and defrost pipeline, 3rd tie point 63 of outdoor heat exchanger and defrost pipeline, 4th tie point 64 of outdoor heat exchanger and defrost pipeline, 5th tie point 65 of outdoor heat exchanger and defrost pipeline, in like manner the second tie point 62 of outdoor heat exchanger and defrost pipeline, 3rd tie point 63 of outdoor heat exchanger and defrost pipeline, 4th tie point 64 of outdoor heat exchanger and defrost pipeline, outdoor heat exchanger lays respectively at the different position of outdoor heat exchanger from the 5th tie point 65 of defrost pipeline.
Wherein flow distributor 11 adopts capillary restrictor.
Embodiment 8
All the other are identical with embodiment 2, and difference is, flow distributor 11 adopts nozzle restrictor.The Defrost method of this defroster is adopted to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature 0 ~-5 DEG C, pipe temperature sensor detects≤-6 DEG C, and difference >=6 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, air-conditioning conventional operation simultaneously, namely the first Controlled valve is controlled and the second Controlled valve path opens 30 seconds, and starting nozzle flow controller simultaneously, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 12 minutes, air conditioner carries out conventional heating operation.
Embodiment 9
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first pipe temperature sensor gathers the temperature of outdoor heat exchanger and outdoor environment; Then the temperature of heat exchanger detected according to pipe temperature sensor and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature 0 ~-5 DEG C, pipe temperature sensor detects≤-6 DEG C, and difference >=6 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 60 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 20 minutes, air conditioner carries out conventional heating operation.
Embodiment 10
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature 0 ~-5 DEG C, pipe temperature sensor detects≤-6 DEG C, and difference >=6 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 5 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 5 minutes, air conditioner carries out conventional heating operation.
Embodiment 11
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature 0 ~-5 DEG C, pipe temperature sensor detects≤-6 DEG C, and difference >=6 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 25 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 17 minutes, air conditioner carries out conventional heating operation.
Embodiment 12
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature 0 ~-5 DEG C, pipe temperature sensor detects≤-6 DEG C, and difference >=6 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 45 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 30 minutes, air conditioner carries out conventional heating operation.
Embodiment 13
All the other are identical with embodiment 2, and difference is, first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature <-5 DEG C, pipe temperature sensor detects≤-8 DEG C, and difference >=8 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 5 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 10 minutes, air conditioner carries out conventional heating operation.
Embodiment 14
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature <-5 DEG C, pipe temperature sensor detects≤-8 DEG C, and difference >=8 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 17 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 25 minutes, air conditioner carries out conventional heating operation.
Embodiment 15
All the other are identical with embodiment 2, and difference is, adopt the Defrost method of this defroster to comprise the following steps: first outdoor pipe temperature sensor 7 and outdoor ring temperature sensor 5 gather the temperature of outdoor heat exchanger and outdoor environment respectively; Then according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation, when collecting outdoor ring temperature <-5 DEG C, pipe temperature sensor detects≤-8 DEG C, and difference >=8 DEG C of the gentle pipe temperature of outdoor ring, enter defrost, control the first Controlled valve to open, defrost, simultaneously air-conditioning conventional operation, namely control the first Controlled valve and the second Controlled valve path opens 30 seconds, otherwise carry out the temperature of Resurvey outdoor heat exchanger and outdoor environment.And then judge that whether outdoor heat exchanger meets and exit defrosting condition, pipe temperature sensor temperature acquisition to Guan Wen >=8 DEG C, then exits air-conditioning defrost; Close the first Controlled valve and the second Controlled valve 40 minutes, air conditioner carries out conventional heating operation.
The invention has the beneficial effects as follows: the part of refrigerant waste heat that indoor heat exchanger is exported by the first Controlled valve by the present invention and outdoor heat exchanger are connected, and defrost.Without the need to shutting down; continuous print can be realized heat; effectively can also improve air-conditioning COP value simultaneously; and only need sub-fraction heat just can reach the effect of defrosting; the cold-producing medium of the HTHP of compressor outlet still preferentially by indoor heat exchanger, thus ensures that indoor heating temperature does not decline substantially, effectively ensures heating capacity; and the comfort level that greatly strengthen in air conditioning chamber, achieves unexpected effect.Adopt the Defrost method of this device; defrosting action can be completed in non-stop-machine situation; solving the technical barrier that this area can not effectively solve for a long time, when once detecting that outdoor heat exchanger carries out defrosting action when having white, can effectively stop outdoor heat exchanger frosting.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. a defroster; defrosting is not shut down for air-conditioning; it is characterized in that; conveyance conduit between connection internal-external heat exchanger device increases and is provided with a road first defrost pipeline; one end communication chamber external heat exchanger of described first defrost pipeline; other end connection heats the conveyance conduit flowing to restricting element front end, and described first defrost pipeline is provided with the first Controlled valve.
2. defroster according to claim 1, is characterized in that, be also provided with flow distributor in described first defrost pipeline, described flow distributor is located between described first Controlled valve and described outdoor heat exchanger.
3. defroster according to claim 1 and 2, it is characterized in that, described first defrost pipeline is arranged in parallel at least one road second defrost pipeline, outdoor heat exchanger described in described second defrost pipeline communication, described second defrost pipeline is provided with the second Controlled valve.
4. defroster according to claim 3, is characterized in that, be also provided with flow distributor in described second defrost pipeline, described flow distributor is located between described second Controlled valve and described outdoor heat exchanger.
5. the defroster according to claim 2 or 4, is characterized in that, described flow distributor adopts electric expansion valve flow controller or capillary restrictor or nozzle restrictor.
6. defroster according to claim 1, is characterized in that, is also provided with the pipe temperature sensor for sensing chamber's external heat exchanger temperature.
7. idle call does not shut down a Defrost method, adopts defroster according to claim 1, it is characterized in that, comprise the following steps: the temperature 1) gathering outdoor heat exchanger and outdoor environment;
2) according to the temperature of heat exchanger detected and the temperature of outdoor environment, determine whether to enter Defrost operation; If enter Defrost operation, then carry out step 3, otherwise carry out step 1;
3) control described first Controlled valve to open, defrost, air-conditioning heating runs simultaneously;
4) judge whether outdoor heat exchanger meets and exit defrosting condition, if meet, perform step 5, otherwise perform step 3;
5) close the first Controlled valve, air conditioner carries out conventional heating operation.
8. idle call according to claim 7 does not shut down Defrost method, it is characterized in that, in described step 3, also controls described second Controlled valve and opens, in described step 5, also close described second Controlled valve.
9. the idle call according to claim 7 or 8 does not shut down Defrost method, it is characterized in that, in described step 3), controls described first Controlled valve or/and the second Controlled valve opens and closes the time,
Namely air-conditioner operation time is controlled and the defrost time is respectively 1 ∽ 40 minutes and 1 ∽ 2 minutes.
10. with an air-conditioning of not shutting down defroster, it is characterized in that, increase between the outdoor heat exchanger and indoor heat exchanger of air-conditioning and be provided with defroster as claimed in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410012460.6A CN104776657A (en) | 2014-01-11 | 2014-01-11 | Defrosting device, defrosting method and air conditioner provided with defrosting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410012460.6A CN104776657A (en) | 2014-01-11 | 2014-01-11 | Defrosting device, defrosting method and air conditioner provided with defrosting device |
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| CN104776657A true CN104776657A (en) | 2015-07-15 |
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| CN201410012460.6A Pending CN104776657A (en) | 2014-01-11 | 2014-01-11 | Defrosting device, defrosting method and air conditioner provided with defrosting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108954675A (en) * | 2018-07-17 | 2018-12-07 | 苏州韵之秋智能科技有限公司 | One kind not shutting down defrost intelligent air condition |
| CN108954676A (en) * | 2018-07-17 | 2018-12-07 | 苏州韵之秋智能科技有限公司 | A kind of intelligent air condition does not shut down defrosting method |
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