CN107023746B - Pressure type temperature control automatic drain valve - Google Patents
Pressure type temperature control automatic drain valve Download PDFInfo
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- CN107023746B CN107023746B CN201710353009.4A CN201710353009A CN107023746B CN 107023746 B CN107023746 B CN 107023746B CN 201710353009 A CN201710353009 A CN 201710353009A CN 107023746 B CN107023746 B CN 107023746B
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- compression spring
- support
- drain valve
- corrugated pipe
- pressure type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/02—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally
- F16T1/06—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally by expansion tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Temperature-Responsive Valves (AREA)
- Safety Valves (AREA)
Abstract
A pressure type temperature control automatic drain valve is characterized in that a movable top column is welded at the top of a metal corrugated pipe and consists of a large-stage cylinder and a small-stage cylinder, a compression spring is arranged between the bottom of a support and the top of the metal corrugated pipe and is a conical spiral compression spring, the small diameter end of the compression spring is in contact connection with the top of the metal corrugated pipe, and the large diameter end of the compression spring is in contact connection with the bottom of the support. The pressure type temperature control automatic drain valve adopts the environment-friendly working medium R600A, has the same height and small volume as the original temperature control automatic drain valve adopting the non-environment-friendly working medium R160, and can be applied to a compact heat pump cooling and heating window type air conditioner model.
Description
Technical Field
The invention relates to the technical field of drain valves for air conditioners, in particular to a pressure type temperature control automatic drain valve for a heat pump cooling and heating window type air conditioner.
Background
The heat pump cooling and heating window type air conditioner keeps condensed water flowing to the bottom plate when refrigerating in summer, and the condensed water is splashed onto an outdoor heat exchanger (serving as a condenser at the moment) by an outdoor unit fan blade, so that the refrigerating efficiency can be improved; however, in winter, the defrosting water on the chassis must flow away when the heat pump heats, otherwise the defrosting water will splash on the outdoor heat exchanger (which is used as an evaporator) and frost, and the heating effect is seriously affected. At present, a temperature control automatic drain valve arranged on a bottom plate of an air conditioner is adopted to realize automatic water plugging and draining, and the automatic drain valve comprises a corrugated pipe, a movable top shaft fixed on the corrugated pipe, a conical rubber plug at the end of the movable top shaft, a support and the like, wherein a refrigerant working medium is filled in the corrugated pipe, the saturation pressure of the working medium in the corrugated pipe is increased when the ambient temperature is high, the corrugated pipe expands to plug a water outlet of the bottom plate, and the pressure of the working medium in the corrugated pipe is reduced when the ambient temperature is low to enable the corrugated pipe to shrink and drain water.
Chinese patent CN2326896Y discloses such a temperature-controlled automatic drain valve. The working medium actually used in the patent is R160, the standard boiling point of the working medium is 13.1 ℃, the corrugated pipe expands when the ambient temperature is higher than the standard boiling point of the working medium, the corrugated pipe contracts when the ambient temperature is lower than the standard boiling point of the working medium, the corrugated pipe expands to plug the water outlet of the chassis when the ambient temperature is lower than the standard boiling point of the working medium, the corrugated pipe contracts to be more than 5mm away from the water outlet of the chassis when the ambient temperature is in summer (for example, more than 20 ℃), and accumulated water is completely discharged. Because the standard boiling point of the working medium is just between the temperature of summer and winter, and the expansion and contraction strokes of the corrugated pipe are utilized, the function can be realized by using the relatively short corrugated pipe, and the wave number of the corrugated pipe is 7 at the moment. However, R160 (monochloroethane) contains chloride ions, belongs to the HCFC working substance, and is a non-environmentally friendly working substance because it is eventually discharged to the atmosphere after being discarded, and causes damage to the ozone layer, and thus, the use of the HCFC working substance has been completely prohibited in developed countries since 2015.
FIG. 1 shows a scheme of a temperature-controlled automatic drain valve designed according to the conventional design after an environment-friendly working medium R600A is used. After the environment-friendly working medium is used, the standard boiling point of the environment-friendly working medium R600A is-11.7 ℃, the corrugated pipe is in an expansion state even under the environment (for example, 5 ℃) in winter, the environment conversion in summer and winter can only utilize one part of the expansion state of the corrugated pipe, and is limited by the single-wave allowed maximum displacement of the corrugated pipe (the corrugated pipe is subjected to permanent plastic deformation when the single-wave allowed maximum displacement is exceeded, so that the working state of the drain valve is changed and even the drain valve is failed), 13 corrugated pipes are selected, and the temperature displacement requirement can be met by nearly one time compared with the condition that the working medium R160 is adopted. Because the wave number of the corrugated pipe is large and the corrugated pipe always works in an expansion state, the height and the volume of the automatic temperature drain valve adopting the environment-friendly working medium R600A are almost doubled, and the automatic temperature drain valve is limited to be applied to certain compact heat pump cooling and heating window type air conditioner models.
Disclosure of Invention
The invention aims to provide a pressure type temperature-controlled automatic drain valve which adopts an environment-friendly working medium R600A, but has the same height and small volume as the original temperature-controlled automatic drain valve adopting a non-environment-friendly working medium R160, thereby being capable of being applied to a compact heat pump cooling and heating window type air conditioner model.
The technical solution proposed by the invention is as follows:
the utility model provides a pressure type control by temperature change automatic drain valve, includes corrugated metal pipe, capillary, bottom plate, mount, support, removal fore-set, plug, the tip and the capillary of corrugated metal pipe lower part are brazed on the bottom plate, fill into environmental protection working medium R600A and seal through the capillary tip, and the bottom plate is fixed in the mount bottom, and mount upper portion riveting is on the support, and the welding of removal fore-set is at corrugated metal pipe top, and the upper end that removes to withstand is equipped with toper plug 7 admittedly, is equipped with a pressure spring between support bottom and corrugated metal pipe top, compression spring adopts circular cone spiral compression spring, and the path end of this compression spring is connected with the top contact on the corrugated metal pipe, remove the fore-set and constitute by big, little cylinder and the centre bore sliding connection of support, big or small cylinder level and support bottom location contact connection.
Due to the pressure of the compression spring 8, it is possible to make the top of the metal bellows contract against the internal pressure even at an ambient temperature higher than the normal boiling point of the eco-friendly working medium R600A by-11.7 ℃. By designing appropriate freedom and rigidity of the compression spring 8, temperature-controlled automatic drainage parameters such as blocking temperature, opening stroke and the like can be designed.
Because the compression spring adopts the conical spiral compression spring, the space between the bottom of the bracket and the top of the metal corrugated pipe can be fully utilized, and the volume of the drain valve is not required to be increased.
The working principle of the invention is as follows:
the metal bellows can be regarded as a combination of a diaphragm and an elastic element, on one hand, the diaphragm moves to a low pressure side due to the difference between the internal pressure and the external pressure, on the other hand, the elastic body tends to return to a free state due to the displacement, and the two reach balance, namely (Pg-Pa) x A = M x S
Pg- -gas pressure (absolute pressure value), corresponding to temperature (MPa)
Pa- - -atmospheric pressure (absolute pressure value) (MPa)
A-effective area of corrugated pipe (mm) 2 ）
M- - -bellows elastic stiffness (N/mm)
S- - -bellows extension displacement (negative is compression) (mm)
When the environment-friendly working medium R600A with the standard boiling point of-11.7 ℃ is adopted, S is positive even at 5 ℃ and the corrugated pipe expands because 5 ℃ to-11.7 ℃ and Pg (5 ℃) is larger than Pa; at 20 ℃, pg (20 ℃) > > Pa, the bellows expanded more. Because the corrugated pipe only works in the expansion section and is limited by the maximum allowable displacement of the single wave, if the maximum allowable displacement of the single wave is exceeded, the corrugated pipe can generate permanent plastic deformation, more wave numbers are needed, and an expansion space needs to be reserved for the movable top column, so the length and the volume of the drain valve are larger.
After the compression spring is added, the pressure of the compression spring is increased, and the three parts are balanced, namely:
（Pg - Pa）x A = M x S + K x L
k- -compression spring rate in formula
L- - -compression spring compression
Where L and S have the same amount of motion change, i.e., S increases by 1mm and L also increases by 1mm. By properly designing the compression spring rate K and the initial (when the moving top pillar is retracted to the lowest position) compression L 0 The corrugated pipe can be compressed to a certain extent (S is a negative value) at the temperature of 5 ℃, and the corrugated pipe is expanded to the highest position just at the temperature of 20 ℃.
Compared with the prior art, the invention has the following remarkable effects:
(1) The pressure type temperature control automatic drain valve adopts the environment-friendly working medium R600A, achieves the performance parameters required by the temperature control automatic drain valve with smaller volume, and completely meets the installation and working requirements of a compact heat pump cooling and heating window type air conditioner.
(2) The wave number of the core component metal corrugated pipe is greatly reduced, the manufacturing difficulty and the manufacturing cost are greatly reduced, so that the overall cost of the temperature control automatic drain valve is greatly reduced.
Drawings
Fig. 1 shows a simulation structure diagram of a temperature-controlled automatic drain valve using an environment-friendly working medium R600A in a plug jacking state if the conventional design is adopted.
Fig. 2 is a schematic structural view of the pressure type temperature-controlled automatic drain valve of the present invention in a plug jacking state.
Fig. 3 is a schematic structural view of a pressure type temperature controlled automatic water discharge valve of the present invention in a contracted state of a metal bellows.
The reference numbers in the figures denote: 1. a metal bellows; 2. a capillary tube; 3. a base plate; 4. a fixed mount; 5. a support; 6. moving the top pillar; 6-1, large cylinder; 6-2, small cylinder; 6-3, large and small cylindrical grade surfaces; 7. a rubber plug; 8. compressing the spring.
Detailed Description
The present invention is further illustrated by the following examples.
Fig. 1 is a simulation design carried out according to the existing temperature-controlled automatic drain valve structure after adopting an environment-friendly working medium R600A with a standard boiling point of-11.7 ℃, because only a part of expansion displacement of a metal corrugated pipe can be utilized and is limited by the maximum allowable displacement of a single wave of the corrugated pipe, the required performance parameters of the drain valve can be realized by the corrugated pipes with multiple wave numbers (13 waves), and therefore, the height and the volume of the drain valve are nearly doubled compared with the original height and the volume of the drain valve.
Referring to fig. 2-3, a pressure type temperature control automatic drain valve is composed of a metal corrugated pipe 1, a capillary tube 2, a bottom plate 3, a fixing frame 4, a support 5, a movable top column 6, a rubber plug 7 and a compression spring 8, wherein the lower end part of the metal corrugated pipe 1 and the capillary tube 2 are brazed on the bottom plate 3, an environment-friendly working medium R600A with a standard boiling point of-11.7 ℃ is filled into the end part of the capillary tube 2 and sealed, the bottom plate 3 is riveted and fixed at the inner bottom of the fixing frame 4, the upper part of the fixing frame 4 is riveted on the support 5, the movable top column 6 is welded at the upper top part of the metal corrugated pipe 1, the rubber plug 7 is fixedly arranged at the upper end part of the movable top column 6, the compression spring 8 is arranged between the bottom of the support 5 and the upper top part of the metal corrugated pipe 1, the compression spring 8 adopts a conical spiral compression spring, the large diameter end of the compression spring 8 is in contact connection with the bottom of the support 5, and the small diameter end of the compression spring 8 is in contact connection with the upper top part of the metal corrugated pipe 1.
The movable top column 6 consists of a large-stage cylinder 6-1 and a small-stage cylinder 6-2, the small-stage cylinder 6-2 is connected with a central hole of the support 5 in a sliding mode, and the large-stage cylinder 6-3 and the small-stage cylinder 6-3 are connected with the bottom of the support 5 in a positioning contact mode.
The metal corrugated pipe 1 adopts a design of 7 waves, and the single-wave allowed maximum displacement of each wave of the metal corrugated pipe is fully utilized.
The small-diameter end of the compression spring 8 is sleeved on the large cylinder 6-1 of the movable top column 6 and is in contact connection with the top of the metal corrugated pipe 1. The compression spring 8 is a conical spiral spring, which only occupies the height of one spring steel wire diameter (which cannot be achieved by a cylindrical spring) even if the spring is compressed to the limit, so that the space between the bottom of the support 5 and the top of the metal corrugated pipe 1 can be fully utilized, and the whole height and volume of the drain valve do not need to be increased. The height of the large cylinder 6-1 is selected to be slightly larger than the diameter of the steel wire of the compression spring 8, but the height is selected to be 4-5 mm in consideration of the welding process and the welding characteristics between the large cylinder 6-1 and the metal bellows 1.
By properly selecting the diameter of the spring steel wire of the compression spring 8 to ensure enough strength and designing proper spring stiffness and freedom height, the upper limit temperature corresponding to the situation that the movable ejection column 6 reaches the highest position is 20 ℃, and the opening temperature corresponding to the situation that the movable ejection column 6 leaves the highest position by 5mm (called opening stroke) is 5 ℃ can be realized.
The compression spring 8 is made of stainless steel wire and has durable corrosion resistance in a humid environment.
The pressure type temperature control automatic drain valve is reversely arranged on a base plate of a heat pump cooling and heating window type air conditioner through a support 5, and a rubber plug 7 is arranged at a position of a movable top column 6 with an upper limit of 1-2mm to prop against a drain port of the base plate, so that the drain valve can automatically block the drain port in summer and automatically open the drain port for draining water in winter.
Claims (3)
1. The utility model provides a pressure type control by temperature change automatic drain valve, includes corrugated metal pipe (1), capillary (2), bottom plate (3), mount (4), support (5), removes fore-set (6), plug (7), corrugated metal pipe (1) lower tip and capillary (2) are brazed on bottom plate (3), fill into environmental protection working medium R600A and seal through capillary (2) tip, and bottom plate (3) are fixed in mount (4) bottom, and mount (4) upper portion riveting is on support (5), and the welding of fore-set (6) is at corrugated metal pipe (1) top of going up, and the upper end that removes fore-set (6) is equipped with toper plug (7) admittedly, its characterized in that: a compression spring (8) is arranged between the bottom of the support (5) and the top of the corrugated metal pipe (1), the compression spring (8) is a conical spiral compression spring, the small-diameter end of the compression spring (8) is in contact connection with the top of the corrugated metal pipe (1), and the large-diameter end of the compression spring (8) is in contact connection with the bottom of the support (5).
2. The pressure type temperature controlled automatic water discharge valve according to claim 1, wherein: the movable top column (6) consists of a large-stage cylinder (6-1) and a small-stage cylinder (6-2), the small-stage cylinder (6-2) is connected with a central hole of the support (5) in a sliding mode, and the large-stage cylinder (6-3) and the small-stage cylinder (6-3) are connected with the bottom of the support (5) in a positioning contact mode.
3. The pressure type temperature controlled automatic water discharge valve according to claim 1, wherein: the compression spring (8) is formed by winding stainless steel wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710353009.4A CN107023746B (en) | 2017-05-18 | 2017-05-18 | Pressure type temperature control automatic drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710353009.4A CN107023746B (en) | 2017-05-18 | 2017-05-18 | Pressure type temperature control automatic drain valve |
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| Publication Number | Publication Date |
|---|---|
| CN107023746A CN107023746A (en) | 2017-08-08 |
| CN107023746B true CN107023746B (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710353009.4A Active CN107023746B (en) | 2017-05-18 | 2017-05-18 | Pressure type temperature control automatic drain valve |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800688B (en) * | 2018-06-04 | 2020-04-03 | 冰轮环境技术股份有限公司 | Condensation pressure self-adaptive adjusting device and method |
| CN112648577B (en) * | 2021-01-06 | 2023-03-21 | 广西广拓新能源科技有限公司 | Self-cleaning solar street lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326896Y (en) * | 1998-04-27 | 1999-06-30 | 佛山通宝股份有限公司 | Temp.-controlled automatic water draw-off valve for window-type air-conditioner of heat pump |
| CN2390057Y (en) * | 1999-09-21 | 2000-08-02 | 黄岩益华制冷空调阀门厂 | Temp.-controlled drain valve for window type cold and hot air conditioner |
| CN201218589Y (en) * | 2008-06-13 | 2009-04-08 | 蒋国良 | Siphoning type draining valve for environment friendly air conditioner |
| KR20140064301A (en) * | 2012-11-20 | 2014-05-28 | 현대자동차주식회사 | Bellows type ecv of compressor |
| CN206754791U (en) * | 2017-05-18 | 2017-12-15 | 佛山通宝华通控制器有限公司 | A kind of pressure type temperature control automatic drain valve |
-
2017
- 2017-05-18 CN CN201710353009.4A patent/CN107023746B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326896Y (en) * | 1998-04-27 | 1999-06-30 | 佛山通宝股份有限公司 | Temp.-controlled automatic water draw-off valve for window-type air-conditioner of heat pump |
| CN2390057Y (en) * | 1999-09-21 | 2000-08-02 | 黄岩益华制冷空调阀门厂 | Temp.-controlled drain valve for window type cold and hot air conditioner |
| CN201218589Y (en) * | 2008-06-13 | 2009-04-08 | 蒋国良 | Siphoning type draining valve for environment friendly air conditioner |
| KR20140064301A (en) * | 2012-11-20 | 2014-05-28 | 현대자동차주식회사 | Bellows type ecv of compressor |
| CN206754791U (en) * | 2017-05-18 | 2017-12-15 | 佛山通宝华通控制器有限公司 | A kind of pressure type temperature control automatic drain valve |
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| Publication number | Publication date |
|---|---|
| CN107023746A (en) | 2017-08-08 |
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