The second throttle bidirectional heat expansion valve of band filtration
Technical field
The present invention relates to a kind of second throttle bidirectional heat expansion valve with filtration, belong to the throttling technology field of steam compression heat pump type refrigeration system, the refrigeration system that is specially adapted to heat-pump type air-conditioning device is as throttle element.
Background technique
The two-way heating power expansion valve that now is used for the throttling of heat-pump type air-conditioning device refrigeration system, only experience automatic temperature control valve mouth throttling passage cross section and carry out a throttling by bellows, before the throttling and the channel cross-section after the throttling all greater than the maximum cross-section of valve port throttling passage, all do not have filtration in its left and right sides liquid connecting tube and the valve body.When the valve port channel cross-section that different and bellows is experienced valve port throttling passage cross section under the temperature and requirement when cooling condition and the desired flow of heating condition does not match, when remaining impurity enters the thermal expansion innervalve assembly in the refrigeration system, just may cause card or stifled, cause the refrigeration system Energy Efficiency Ratio to descend the refrigeration system cisco unity malfunction
Summary of the invention
The purpose of this invention is to provide a kind of reasonable in design, simple in structure, in the refrigeration system of heat-pump type air-conditioning device, the desired different flow of cooling condition and heating condition can be satisfied, the second throttle bidirectional heat expansion valve of the band filtration of refrigeration system proper functioning can be guaranteed.
The second throttle bidirectional heat expansion valve of band filtration of the present invention, comprise (preceding) passage after (back) passage before valve body, steel ball, valve port throttling passage, the valve port throttling, the valve port throttling, left liquid connecting tube and right connecting tube etc., (preceding) passage is provided with throttle orifice after it is characterized in that before the valve port throttling (back) passage or valve port throttling, the channel cross-section of throttle orifice is equipped with filter screen less than the maximum cross-section of valve port throttling passage between valve body two ends and left liquid connecting tube and the right liquid connecting tube.
Described throttle orifice can directly directly be processed to form by valve body on (preceding) passage after (back) passage or the valve port throttling before the valve port throttling.
Described throttle orifice also can embed before the valve port throttling (preceding) passage after (back) passage or the valve port throttling.
Described throttle orifice also can be arranged on left liquid connecting tube or right liquid connecting tube.
Described filter screen can be conical or polygonal taper.
Described filter screen also can be a hemisphere.
Described filter screen also can be cylindrical or polygonal cylindricality.
Described filter screen also can be disk or polygonal plane.
The second throttle bidirectional heat expansion valve of band filtration of the present invention since before the valve port throttling after (back) passage or the valve port throttling (preceding) passage be provided with throttle orifice, be equipped with filter screen between valve body two ends and left liquid connecting tube and the right liquid connecting tube, in the heat-pump type air-conditioning device refrigeration system, can satisfy the cooling condition traffic demand different with heating condition, because the effect of second throttle can fundamentally overcome ubiquitous fluctuation of heating power expansion valve or vibration, impurity in the refrigeration system also can not enter the thermal expansion innervalve assembly simultaneously, can guarantee the refrigeration system proper functioning.
Description of drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4 are four embodiments' of second throttle bidirectional heat expansion valve of band filtration of the present invention overall structure figure.
Shown in Figure 1:
1-valve body, 2-filter screen, 3-steel ball, 4; (preceding) passage after (back) passage, 6-valve port throttling passage, the throttling of 7-valve port, 8-throttle orifice, 9-left side liquid connecting tube, the right liquid connecting tube of 10-before the throttling of 5-valve port
Shown in Figure 2:
11-valve body, 12-filter screen, 13-steel ball, 14; (preceding) passage after (back) passage, 16-valve port throttling passage, 17-throttle orifice, the throttling of 18-valve port, 19 left liquid connecting tubes, the right liquid connecting tube of 20-before the throttling of 15-valve port
Shown in Figure 3:
(back) passage, 25-throttle orifice, 26-valve port throttling passage, 27 before 21-valve body, 22-filter screen, 23-steel ball, the throttling of 24-valve port; (preceding) passage, 29 left liquid connecting tubes, the right liquid connecting tube of 30-after the throttling of 28-valve port
Shown in Figure 4:
(back) passage, 36-valve port throttling passage, 37 before 31-valve body, 32-filter screen, 33-steel ball, 34-throttle orifice, the throttling of 35-valve port; (preceding) passage, 39 left liquid connecting tubes, the right liquid connecting tube of 40-after the throttling of 38-valve port
Fig. 5 is the heat-pump type air-conditioning device refrigerating system figure.
Shown in Figure 5:
Second throttle bidirectional heat expansion valve, the 45-indoor heat converter of 41-compressor, 42-four-way electromagnetic reversing valve, 43-outdoor heat converter, 44-band filtration
Embodiment
First embodiment of the second throttle bidirectional heat expansion valve of band filtration of the present invention is as shown in Figure 1:
Throttle orifice 8 directly is processed to form by valve body 1, and the channel cross-section of throttle orifice 8 is less than the maximum cross-section of valve port throttling passage 6, and filter screen 2 places respectively between valve body 1 two ends and left liquid connecting tube 9 and the right liquid connecting tube 10.Its working procedure such as Fig. 5 and shown in Figure 1:
If the heat-pump type air-conditioning device refrigeration system is in cooling condition, then the compressed machine 41 of gaseous refrigerant is collapsed into the high pressure-temperature gaseous refrigerant, become high pressure liquid refrigerant through 43 condensations of four-way electromagnetic reversing valve 42 inlet chamber outer heat-exchangers, high pressure liquid refrigerant enters the second throttle bidirectional heat expansion valve 44 of band filtration from the left liquid connecting tube 9 of the second throttle bidirectional heat expansion valve 44 of band filtration, through valve port throttling prepass 4,5 enter and experience temperature by bellows and regulate the valve port throttling passage 6 of channel cross-section automatically and carry out the throttling first time, high pressure liquid refrigerant becomes the low-pressure low-temperature gas-liquid mixed refrigerant after the throttling first time, passage 7 enters throttle orifice 8 and carries out the throttling second time after the valve port throttling, the low-pressure low-temperature gas-liquid mixed refrigerant becomes pressure and temperature after the throttling second time lower, the gas-liquid mixed refrigerant that the gaseous refrigerant ratio is higher, entering indoor heat converter 45 heat absorption evaporations through right liquid connecting tube 10 becomes low-pressure gaseous refrigerant, gets back to the circulation that compressor 41 is finished cooling condition through four-way electromagnetic reversing valve 42.
If heat-pump type air-conditioning device is in heating condition, then the compressed machine 41 of gaseous refrigerant is collapsed into the high pressure-temperature gaseous refrigerant, enter indoor heat converter 45 condensations through four-way electromagnetic reversing valve 42 and become high pressure liquid refrigerant, high pressure liquid refrigerant enters the second throttle bidirectional heat expansion valve 44 of band filtration from the right liquid connecting tube 10 of the second throttle bidirectional heat expansion valve 44 of band filtration, carry out the throttling first time through throttle orifice 8, enter valve port throttling passage 6 through valve port throttling prepass 7 and carry out the throttling second time, passage 4 after the gas-liquid mixed refrigerant behind the second throttle passes through the valve port throttling, 5 and left liquid connecting tube 9 inlet chamber outer heat-exchangers 43 heat absorption evaporation become low-pressure gaseous refrigerant, get back to compressor 41 through four-way electromagnetic reversing valve 42 and finish and heat circulation.
Because during cooling condition, the valve port throttling passage 6 that can regulate channel cross-section automatically is first throttle, throttle orifice 8 is second throttling, and during heating condition, throttle orifice 8 is throttling for the first time, the valve port throttling passage 6 that can regulate channel cross-section automatically is throttling for the second time, in heat-pump type air-conditioning device, during forward and reverse work, can satisfy the desired different flow of cooling condition and heating condition, second throttle can fundamentally overcome ubiquitous fluctuation of heating power expansion valve and vibration simultaneously, improves the Energy Efficiency Ratio of refrigeration system.Owing to be equipped with filter screen 2 between valve body 1 and left liquid connecting tube 9 and the right liquid connecting tube 10, during no matter forward and reverse work, all the remaining impurity in the refrigeration system can be blocked in outside the thermal expansion innervalve assembly assurance refrigeration system proper functioning.