CN102121726B - Method for preventing refrigerant leakage and air conditioner - Google Patents
Method for preventing refrigerant leakage and air conditioner Download PDFInfo
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- CN102121726B CN102121726B CN201010004563A CN201010004563A CN102121726B CN 102121726 B CN102121726 B CN 102121726B CN 201010004563 A CN201010004563 A CN 201010004563A CN 201010004563 A CN201010004563 A CN 201010004563A CN 102121726 B CN102121726 B CN 102121726B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 230000002159 abnormal effect Effects 0.000 claims abstract description 7
- 238000004378 air conditioning Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention provides a method for preventing refrigerant leakage and an air conditioner, wherein the air conditioner comprises the following components: an indoor unit; an outdoor unit; a refrigerant circulation circuit connecting the indoor unit and the outdoor unit, comprising: the first air pipe connecting pipe is connected between a first air pipe of the outdoor unit and the indoor unit; the first liquid pipe connecting pipe is connected between a first liquid pipe of the outdoor unit and the indoor unit, and electromagnetic valves are respectively arranged in the first air pipe and the first liquid pipe; and the processor is connected with the electromagnetic valve and is used for detecting whether the air conditioner is in a normal working state or not, controlling the electromagnetic valve to be in an opening state when the air conditioner is in the normal working state, and controlling the electromagnetic valve to be in a closing state when the air conditioner is in a non-working state or an abnormal working state. The invention can prevent the refrigerant in the air conditioner from leaking.
Description
Technical field
The present invention relates to appliance field, more specifically, relate to a kind of method and air-conditioner that prevents that cold-producing medium from leaking.
Background technology
The detachable air conditioner indoor and outdoor machine need dock the formation refrigerant circulation loop through tube connector; The connection of indoor and outdoor machine generally has dual mode: the one, large and small valve is set on the off-premises station; The evaporimeter inlet pipe is provided with nut with going out on the pipe; Tube connector is packed separately, when installing after sale, tube connector two respectively with indoor set into and out of the pipe and the large and small valve of off-premises station through being threaded; The 2nd, off-premises station is provided with snap joint, and tube connector directly is welded on the indoor evaporator, and tail end is provided with snap joint, and when installing after sale, directly the snap joint butt joint with indoor and outside gets final product.
Adopt the detachable air conditioner of snap joint easy for installation, generally be applied on the outlet air-conditioner.But there is the not strong problem of sealing in snap joint, causes leakage of refrigerant easily, and for the outlet air-conditioner, transportation is longer after sale, and leakage of refrigerant is too much very big to the heat pump performance influence, and environment is caused adverse effect.
Simultaneously, leakage of refrigerant takes place in air-conditioner easily in the tube connector junction after installing after sale, has both influenced the serviceability of air-conditioner, again environment is caused harmful.
The general major part of air-conditioning refrigerant stockpiles in the outside, and when air-conditioning was not worked, the outside was communicated with the indoor always, if the tube connector place reveals, possibly cause the outside cold-producing medium outwards to be revealed always.
Problem to air conditioner in the correlation technique tends to leak does not propose effective solution at present as yet.
Summary of the invention
The present invention aims to provide a kind of method and air-conditioner that prevents that cold-producing medium from leaking, can solve that air conditioner tends to leak etc. problem.
According to an aspect of the present invention, a kind of air-conditioner that prevents that cold-producing medium from leaking is provided.
According to the air-conditioner that prevents that cold-producing medium from leaking of the present invention, comprising: indoor set; Off-premises station; Refrigerant circulation loop connects indoor set and off-premises station, and comprising: the first tracheae tube connector is connected between first tracheae and indoor set of off-premises station; The first liquid pipe connected pipe is connected between the first liquid pipe and indoor set of off-premises station, wherein, in first tracheae and the first liquid pipe, is respectively arranged with magnetic valve; Processor is connected with magnetic valve, detects air-conditioner and whether is in normal operating conditions; When air-conditioner is in normal operating conditions; The control magnetic valve is an opening, and when air-conditioner was in off working state or abnormal work state, the control magnetic valve was a closed condition.
Preferably, air-conditioner also comprises: first valve is connected between the magnetic valve and the first tracheae tube connector on first tracheae; Second valve is connected between the magnetic valve and the first liquid pipe connected pipe on the first liquid pipe.
Preferably, the tracheae of indoor set and liquid pipe are provided with magnetic valve, and the tracheae and the liquid pipe of indoor set are opened or closing control.
Preferably, the first tracheae tube connector comprises: the second tracheae tube connector, and an end is connected in the air inlet pipe of indoor set, and the other end connects snap joint; The 3rd tracheae tube connector, an end connects snap joint, and the other end is connected on first tracheae of off-premises station; The first liquid pipe connected pipe comprises: the second liquid pipe connected pipe, an end are connected in the liquid pipe of indoor set, and the other end connects snap joint; The 3rd liquid pipe connected pipe, an end is connected in snap joint, and the other end is connected on the first liquid pipe of off-premises station.
Preferably, on the second tracheae tube connector the 3rd valve is set, the 3rd valve can be magnetic valve or stop valve; On the second liquid pipe connected pipe the 3rd valve is set, the 3rd valve can be magnetic valve or stop valve.
According to another aspect of the present invention, a kind of method that prevents that cold-producing medium from leaking is provided.
According to the method that prevents that cold-producing medium from leaking of the present invention, comprising: processor detects air-conditioner and whether is in normal operating conditions; When air-conditioner was in off position or abnormal work state, processor control magnetic valve was in closed condition to end processing to connecting indoor set and off-premises station refrigerant circulation loop, and wherein, magnetic valve is arranged in the refrigerant circulation loop.
Preferably, be at air-conditioner under the situation of normal operating conditions, this method also comprises: processor control magnetic valve is in full-gear.
Preferably, refrigerant circulation loop comprises: the first tracheae tube connector is connected between first tracheae and indoor set of off-premises station; The first liquid pipe connected pipe is connected between the first liquid pipe and indoor set of off-premises station, wherein, in the first tracheae tube connector and the first liquid pipe connected pipe, is provided with stop valve or magnetic valve.
Preferably; This tracheae tube connector comprises: refrigerant circulation loop is provided with snap joint; The tracheae of off-premises station is connected with snap joint respectively with the liquid pipe; Magnetic valve respectively with the off-premises station tracheae be connected with the liquid pipe, method also comprises: be under the situation of off-state at off-premises station and indoor set, respectively the tracheae and the liquid pipe of off-premises station ended processing through magnetic valve on the tracheae of being located at off-premises station and the magnetic valve be located on the off-premises station liquid pipe.
Preferably; On refrigerant circulation loop, be provided with snap joint; The tracheae of indoor set is connected with snap joint respectively with the liquid pipe, and indoor set tracheae and liquid pipe are provided with valve, and valve is magnetic valve or stop valve; Method also comprises: be under the situation of off-state at off-premises station and indoor set, through valve the tracheae and the liquid pipe of indoor set ended processing.
Comprise according to the air-conditioner that prevents that cold-producing medium from leaking provided by the invention: indoor set; Off-premises station; The first tracheae tube connector is connected in first gas flow tube in the off-premises station; The first liquid pipe connected pipe is connected in first fluid flow tube in the off-premises station, wherein, in first gas flow tube and first fluid flow tube, is respectively arranged with magnetic valve.Through the present invention, overcome the problem that air conditioner tends to leak, and then reached the effect of the cold-producing medium leakage that prevents in the air conditioner.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map that prevents the air-conditioner that cold-producing medium leaks according to the embodiment of the invention;
Fig. 2 is the sketch map that preferably prevents the air-conditioner that cold-producing medium leaks according to the embodiment of the invention;
Fig. 3 is the flow chart that prevents the method that cold-producing medium leaks according to the embodiment of the invention.
The specific embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Fig. 1 is the sketch map that prevents the air-conditioner that cold-producing medium leaks according to the embodiment of the invention; Fig. 2 is the sketch map that preferably prevents the air-conditioner that cold-producing medium leaks according to the embodiment of the invention.
The technical scheme of we invention is for respectively increasing a magnetic valve in that the big minor valve of air-conditioner outdoor unit (or snap joint) is preceding; And magnetic valve is in closed condition when air-conditioner is not worked; Cut off flowing of cold-producing medium, the outside cold-producing medium is enclosed in outdoor heat exchanger and the pipeline can get into tube connector; When air-conditioner started, magnetic valve was also opened simultaneously, did not influence the proper flow of cold-producing medium.
As illustrated in fig. 1 and 2, prevent the air-conditioner that cold-producing medium leaks, comprising: indoor set 10; Off-premises station 40; Auxiliary throttling arrangement 44; Check valve 45; Throttling arrangement 46; Outdoor heat exchanger 47; Compressor 48; Cross valve 49; The first tracheae tube connector 200 is connected in first gas flow tube 220 in the off-premises station 40; The first liquid pipe connected pipe 300 is connected in first fluid flow tube 230 in the off-premises station 40, wherein, in first gas flow tube 220 and first fluid flow tube 230, is respectively arranged with magnetic valve 43; Processor is connected with magnetic valve 43, detects air-conditioner and whether is in normal operating conditions; When air-conditioner is in normal operating conditions; The control magnetic valve is an opening, and when air-conditioner was in off working state or abnormal work state, the control magnetic valve was a closed condition.
Wherein, indoor set 10, off-premises station 40, tracheae tube connector 200 and liquid pipe connected pipe 300 constitute the closed circuit of air-conditioner with this.The tracheae tube connector connects indoor evaporator discharge and off-premises station stop valve 80, and the liquid pipe connected pipe connects indoor evaporator feed tube and off-premises station stop valve 80.
Before two stop valves 80 of air-conditioner outdoor unit, respectively add a magnetic valve 43, and control magnetic valve 43 is in closed condition when air-conditioner is not worked, is about to the outside cold-producing medium and is completely enclosed within outdoor heat exchanger 47 and the pipeline.If the tube connector place reveals, in idle time, outdoor refrigerant is closed in the outside fully at air-conditioning like this, is not communicated with tube connector, therefore can not reveal.During air-conditioner work, 2 magnetic valves outside the control room are in open mode, do not influence the cold-producing medium proper flow.
Among the present invention, air-conditioner can also comprise: first valve 80 is connected between the magnetic valve 43 and the first tracheae tube connector 200 on first tracheae 220; Second valve 80 is connected between the magnetic valve 43 and the first liquid pipe connected pipe 300 on the first liquid pipe 230.
Among the present invention, tracheae and liquid pipe that can indoor set be provided with magnetic valve, and the tracheae and the liquid pipe of indoor set are opened or closing control.
Among the present invention, the first tracheae tube connector 200 can comprise: the second tracheae tube connector, 20, one ends are connected in the air inlet pipe of indoor set, and the other end connects snap joint 60; The 3rd tracheae tube connector 120, one ends connect snap joint 70, and the other end is connected on first tracheae 220 of off-premises station; The first liquid pipe connected pipe 300 comprises: the second liquid pipe connected pipe, 30, one ends are connected in the liquid pipe of indoor set, and the other end connects snap joint 60; The 3rd liquid pipe connected pipe 130, one ends are connected in snap joint 70, and the other end is connected on the first liquid pipe 230 of off-premises station.
Among the present invention, the second tracheae tube connector 20 is connected in the tracheae of said indoor set, and connected mode is welding or the fixed connection of other reliable sealing, and it is magnetic valve or stop valve that the 3rd valve 50, the three valves are set on the second tracheae tube connector 20; The second liquid pipe connected pipe 30 is connected in the liquid pipe of said indoor set, and connected mode is provided with the 3rd valve 50, the three valves and can be magnetic valve or stop valve for welding or the fixed connection of other reliable sealing on the second liquid pipe connected pipe 30.
As depicted in figs. 1 and 2, in the present invention, though the air-conditioning refrigerant major part can stockpile in the outside; But evaporimeter also has part of refrigerant in the indoor; In order better to reduce amount of leakage,, on the tracheae tube connector of indoor and liquid pipe connected pipe, respectively increase a magnetic valve in addition except that before the big minor valve of off-premises station, increasing the magnetic valve; It is in closed condition same control when air-conditioner is not worked, indoor cold-producing medium complete closed is not communicated with tube connector.
During air-conditioner work, 4 magnetic valves of indoor and outdoor all are in open mode, do not influence the cold-producing medium proper flow.
Fig. 2 is the sketch map that preferably prevents the air-conditioner that cold-producing medium leaks according to the embodiment of the invention.
To detachable air conditioner, leakage of refrigerant often occurs in joint such as tube connector joint etc., and when air-conditioner was not worked, the cold-producing medium major part stockpiled in outdoor heat exchanger.This air-conditioner that preferably prevents the cold-producing medium leakage is closed in the outside with cold-producing medium when air-conditioner is not worked, if indoor set or tube connector place reveal, the outside cold-producing medium can not get into tube connector, can reduce the leakage of refrigerant amount.
As shown in Figure 2, preferably prevent the air-conditioner that cold-producing medium leaks, comprising: indoor set 10; The second tracheae tube connector, 20, one ends are connected in the air inlet pipe of indoor set 10, and the other end has snap joint 60; The second liquid pipe connected pipe, 30, one ends are connected in the collector tube of indoor set 10, and the other end has snap joint 60; Off-premises station 40; The 3rd tracheae tube connector 120, one ends are connected in the tracheae of off-premises station 40, and the other end has snap joint 70; The 3rd liquid pipe connected pipe 130, one ends are connected in the liquid pipe of off-premises station 40, and the other end has snap joint 70; Wherein, The snap joint 60 of the second tracheae tube connector 20 can be connected with the snap joint 70 of the 3rd tracheae tube connector 120 so that the second tracheae tube connector 20 and the 3rd tracheae tube connector 120 are conducted; The snap joint 60 of the second liquid pipe connected pipe 30 can be connected with the snap joint 70 of the 3rd liquid pipe connected pipe 130 so that the second liquid pipe connected pipe 30 and the 3rd liquid pipe connected pipe 130 are conducted; Wherein, in the 3rd tracheae tube connector 120 and the 3rd liquid pipe connected pipe 130, be provided with first stop valve 80.
Preferably; In the air-conditioner production process; After going into cold-producing medium toward the indoor and outdoors mechanical irrigation, indoor stop valve 50 is all transferred to full closing state with outdoor stop valve 80, respectively cold-producing medium is enclosed in indoor evaporator and outdoor condenser and the pipeline; Strengthened sealing, reduced in the transportation because the leakage that the snap joint poor sealing causes.After when air-conditioner is installed the snap joint butt joint of indoor and outdoor being finished, indoor stop valve 50 is all transferred to full open mode with outdoor stop valve 80, do not influence cold-producing medium and flow normally in the course of the work.
According to embodiments of the invention, a kind of method that prevents that cold-producing medium from leaking is provided.
Fig. 3 is the flow chart that prevents the method that cold-producing medium leaks according to the embodiment of the invention.
As shown in Figure 3, this method comprises the steps S302 to S304:
Step S302, processor detect air-conditioner and whether are in normal operating conditions;
Step S304; When air-conditioner is in off position or abnormal work state; Processor control magnetic valve is in closed condition to end processing to connecting indoor set and off-premises station refrigerant circulation loop, and wherein, magnetic valve is arranged in the refrigerant circulation loop.
Wherein, be at air-conditioner under the situation of normal operating conditions, this method also comprises: processor control magnetic valve is in full-gear.
In the present invention, refrigerant circulation loop can comprise: the first tracheae tube connector 200 is connected between first tracheae 220 and indoor set of off-premises station 40; The first liquid pipe connected pipe 300 is connected between the first liquid pipe 230 and indoor set of off-premises station 40, wherein, in the first tracheae tube connector 200 and the first liquid pipe connected pipe 300, is provided with stop valve or magnetic valve.
Among the present invention; On refrigerant circulation loop, can be provided with snap joint; The tracheae of off-premises station is connected with snap joint respectively with the liquid pipe; Magnetic valve respectively with the off-premises station tracheae be connected with the liquid pipe, method also comprises: be under the situation of off-state at off-premises station and indoor set, respectively the tracheae and the liquid pipe of off-premises station ended processing through magnetic valve on the tracheae of being located at off-premises station and the magnetic valve be located on the off-premises station liquid pipe
In the present invention; On refrigerant circulation loop, be provided with snap joint; The tracheae of indoor set is connected with snap joint respectively with the liquid pipe, and indoor set tracheae and liquid pipe are provided with valve, and valve is magnetic valve or stop valve; Method also comprises: be under the situation of off-state at off-premises station and indoor set, through valve the tracheae and the liquid pipe of indoor set ended processing.
From above description; Can find out that the above embodiments of the present invention have realized following technique effect: the present invention is in closed condition with magnetic valve when air-conditioning is not worked, and cuts off indoor and outdoor machine and is communicated with; Make indoor and outdoor machine be in off-state; So that when tube connector or indoor generation leakage of refrigerant, most of cold-producing medium of outside can not get into tube connector and cause leakage of refrigerant, thereby has controlled the cold-producing medium leakage rate.Stop valve all is in closed condition before guaranteeing the air conditioner indoor and outdoor machine butt joint simultaneously, can reduce the occurrence probability of leakage of refrigerant.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an air-conditioner that prevents that cold-producing medium from leaking is characterized in that, comprising:
Indoor set (10);
Off-premises station (40);
Refrigerant circulation loop connects said indoor set (10) and said off-premises station (40), comprising:
The first tracheae tube connector (200) is connected between first tracheae (220) and said indoor set of said off-premises station (40);
The first liquid pipe connected pipe (300) is connected between the first liquid pipe (230) and indoor set of said off-premises station (40), wherein,
In said first tracheae (220) and the said first liquid pipe (230), be respectively arranged with magnetic valve (43);
Processor; Be connected with said magnetic valve (43); Detect said air-conditioner and whether be in normal operating conditions, when said air-conditioner was in normal operating conditions, controlling said magnetic valve was opening; When said air-conditioner was in off working state or abnormal work state, controlling said magnetic valve was closed condition.
2. air-conditioner according to claim 1 is characterized in that, said air-conditioner also comprises:
First valve is connected between the magnetic valve (43) and the said first tracheae tube connector (200) on said first tracheae (220);
Second valve is connected between the magnetic valve (43) and the said first liquid pipe connected pipe (300) on the said first liquid pipe (230).
3. air-conditioner according to claim 1 and 2 is characterized in that,
The tracheae of said indoor set and liquid pipe are provided with magnetic valve, and the tracheae and the liquid pipe of said indoor set are opened or closing control.
4. air-conditioner according to claim 1 is characterized in that,
The said first tracheae tube connector (200) comprising:
The second tracheae tube connector (20), an end is connected in the air inlet pipe of said indoor set, and the other end connects first snap joint (60);
The 3rd tracheae tube connector (120), an end connects second snap joint (70), and the other end is connected on first tracheae (220) of said off-premises station; The said first liquid pipe connected pipe (300) comprising:
The second liquid pipe connected pipe (30), an end is connected in the liquid pipe of said indoor set, and the other end connects first snap joint (60);
The 3rd liquid pipe connected pipe (130), an end is connected in second snap joint (70), and the other end is connected on the first liquid pipe (230) of said off-premises station.
5. air-conditioner according to claim 4 is characterized in that,
The said second tracheae tube connector (20) is connected in the tracheae of said indoor set, on the second tracheae tube connector (20) the 3rd valve (50) is set, and said the 3rd valve (50) is magnetic valve or stop valve;
The said second liquid pipe connected pipe (30) is connected in the liquid pipe of said indoor set, on the second liquid pipe connected pipe (30) the 3rd valve (50) is set, and said the 3rd valve (50) is magnetic valve or stop valve.
6. a method that prevents that cold-producing medium from leaking is characterized in that, comprising:
Processor detects air-conditioner and whether is in normal operating conditions;
When said air-conditioner is in off position or abnormal work state; Said processor control magnetic valve is in closed condition so that the refrigerant circulation loop that connects indoor set and off-premises station is ended processing; Wherein, said magnetic valve is arranged in the said refrigerant circulation loop.
7. method according to claim 6 is characterized in that, is at said air-conditioner under the situation of normal operating conditions, and said method also comprises:
Said processor is controlled said magnetic valve and is in full-gear.
8. according to claim 6 or 7 described methods, it is characterized in that said refrigerant circulation loop comprises:
The first tracheae tube connector (200) is connected between first tracheae (220) and said indoor set of said off-premises station (40);
The first liquid pipe connected pipe (300) is connected between the first liquid pipe (230) and said indoor set of said off-premises station (40), wherein,
In the said first tracheae tube connector (200) and the first liquid pipe connected pipe (300), be provided with stop valve or magnetic valve.
9. method according to claim 6; It is characterized in that said refrigerant circulation loop is provided with snap joint, the tracheae of said off-premises station is connected with snap joint respectively with the liquid pipe; Magnetic valve is connected with the liquid pipe with described off-premises station tracheae respectively, and said method also comprises:
Be under the situation of off-state at said off-premises station and said indoor set, respectively the tracheae and the liquid pipe of said off-premises station ended processing through magnetic valve on the tracheae of being located at said off-premises station and the magnetic valve of being located on the said off-premises station liquid pipe.
10. method according to claim 6; It is characterized in that; On said refrigerant circulation loop, be provided with snap joint, the tracheae of said indoor set is connected with snap joint respectively with the liquid pipe, and said indoor set tracheae and liquid pipe are provided with valve; Said valve is magnetic valve or stop valve, and said method also comprises:
Be under the situation of off-state at said off-premises station and said indoor set, the tracheae and the liquid pipe of said indoor set ended processing through said valve.
Priority Applications (1)
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CN201010004563A CN102121726B (en) | 2010-01-11 | 2010-01-11 | Method for preventing refrigerant leakage and air conditioner |
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CN201010004563A CN102121726B (en) | 2010-01-11 | 2010-01-11 | Method for preventing refrigerant leakage and air conditioner |
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CN102121726A CN102121726A (en) | 2011-07-13 |
CN102121726B true CN102121726B (en) | 2012-10-17 |
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JP5538329B2 (en) * | 2011-08-18 | 2014-07-02 | 三菱電機株式会社 | Outdoor unit and air conditioner |
CN107314519B (en) * | 2017-06-14 | 2020-05-22 | 海信家电集团股份有限公司 | Method and device for judging refrigerant leakage of air conditioner |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2292956Y (en) * | 1997-04-21 | 1998-09-30 | 郭建发 | Leak-proof pipe joint for air conditioner |
CN2428669Y (en) * | 2000-07-03 | 2001-05-02 | 新昌县制冷部件厂 | Connection tube for split air-conditioner for room |
JP2006342994A (en) * | 2005-06-07 | 2006-12-21 | Mitsubishi Heavy Ind Ltd | Ice heat storage air conditioner |
-
2010
- 2010-01-11 CN CN201010004563A patent/CN102121726B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2292956Y (en) * | 1997-04-21 | 1998-09-30 | 郭建发 | Leak-proof pipe joint for air conditioner |
CN2428669Y (en) * | 2000-07-03 | 2001-05-02 | 新昌县制冷部件厂 | Connection tube for split air-conditioner for room |
JP2006342994A (en) * | 2005-06-07 | 2006-12-21 | Mitsubishi Heavy Ind Ltd | Ice heat storage air conditioner |
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