Second H type automobile air conditioner heat expansion valve
Technical field
The present invention relates to a kind of second H type automobile air conditioner heat expansion valve, belong to the throttling technology field of vapour compression refrigeration system, be specially adapted to automobile air controlling device refrigeration system as throttle element.
Background technique
The H type automobile air-conditioning heating power expansion valve that now is used for the throttling of automobile air controlling 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, be difficult to overcome ubiquitous fluctuation of heating power expansion valve and vibration, cause refrigeration system Energy Efficiency Ratio and refrigerating capacity to descend.
Summary of the invention
The purpose of this invention is to provide a kind of reasonable in designly, simple in structure, can not produce fluctuation and vibration at work, can improve the second H type automobile air conditioner heat expansion valve of refrigeration system Energy Efficiency Ratio and refrigerating capacity.
Second H type automobile air conditioner heat expansion valve of the present invention, comprise passage and attachment hole etc. after valve body, needle, steel ball, valve port throttling passage, valve port throttling prepass and the valve port throttling, passage is provided with throttle orifice after it is characterized in that valve port throttling prepass or valve port throttling, and the channel cross-section of throttle orifice is less than the maximum cross-section of valve port throttling passage.
Described throttle orifice can directly directly be processed to form by valve body on the passage after valve port throttling prepass or the valve port throttling.
Described throttle orifice also can embed passage after valve port throttling prepass or the valve port throttling.
Second H type automobile air conditioner heat expansion valve of the present invention can fundamentally overcome ubiquitous fluctuation of heating power expansion valve or vibration owing to be provided with throttle orifice on the passage after valve port throttling prepass or the valve port throttling in automobile air controlling device refrigeration system.
Description of drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4 are four embodiments' of second H type automobile air conditioner heat expansion valve of the present invention overall structure figure.
Shown in Figure 1:
1-valve body, 2-needle, 3-steel ball, 4; Passage, 8-throttle orifice, 9 after 5-valve port throttling prepass, 6-valve port throttling passage, the throttling of 7-valve port; 10-attachment hole
Shown in Figure 2:
11-valve body, 12-needle, 13-steel ball, 14; Passage, 19 after 15-valve port throttling prepass, 16-valve port throttling passage, 17-throttle orifice, the throttling of 18-valve port; 20-attachment hole
Shown in Figure 3:
21-valve body, 22-needle, 23-steel ball, 24-valve port throttling prepass, 25-throttle orifice, 26-valve port throttling passage, 27; Passage, 29 after the throttling of 28-valve port; 30-attachment hole
Shown in Figure 4:
31-valve body, 32-needle, 33-steel ball, 34-throttle orifice, 35-valve port throttling prepass, 36-valve port throttling passage, 37; Passage, 39 after the throttling of 38-valve port; 40-attachment hole
Fig. 5 is an automobile air controlling device refrigerating system figure.
Shown in Figure 5:
41-compressor, 42-condenser, 43-dry cistern, 44-second H type automobile air conditioner heat expansion valve, 45-vaporizer
Embodiment
First embodiment of second H type automobile air conditioner heat expansion valve 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.Its working procedure such as Fig. 5 and shown in Figure 1:
The compressed machine 41 of gaseous refrigerant is collapsed into the high pressure-temperature gaseous refrigerant, become high pressure liquid refrigerant through condenser 42 condensations, high pressure liquid refrigerant drying cistern 43 enters second H type automobile air conditioner heat expansion valve 44 from the attachment hole 9 of second H type automobile air conditioner heat expansion valve 44, 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 vaporizer 45 heat absorption evaporations through attachment hole 10 becomes low-pressure gaseous refrigerant, gets back to compressor 41 through second H type automobile air conditioner heat expansion valve 44 top air cavitys and finishes refrigeration cycle.
Because high pressure liquid refrigerant through second throttle, therefore can effectively solve ubiquitous fluctuation of heating power expansion valve and vibration, improves the Energy Efficiency Ratio and the refrigerating capacity of refrigeration system.