Thermal expansion valve

Abstract

The invention discloses an energy-saving heating power expansion valve having low vibration and little noise, comprising a valve body, a first inlet channel and a first outlet channel; wherein, the first inlet channel is communicated with a condenser outlet of an air conditioning refrigeration system, and the first outlet channel is communicated with an evaporator inlet of the air conditioning refrigeration system. A second inlet channel of refrigeration agent is communicated with an evaporator outlet of the refrigeration system, and a second outlet channel of the refrigeration agent is communicated with a compressor inlet of the refrigeration system. As the first inlet channel is positioned above the first outlet channel, the refrigeration agent is led in from the middle part of a transmission rod comprising a steel ball, and the transmission rod is prevented from vibrating; when an air conditioner stops running, the first inlet channel is communicated with the first outlet channel, so that the energy consumption needed for starting the air conditioner is reduced; a gap between the transmission rod and the valve body is controlled to lead the bubble contained in the refrigeration agent to be miniaturized, thus reducing the flow noise of the refrigeration agent.

Description

technical field [0001] The invention relates to a thermal expansion valve used in a refrigeration cycle, in particular to a thermal expansion valve used in an automobile air conditioner, which belongs to the valve technology. Background technique [0002] At present, the thermostatic expansion valve used on the vehicle air conditioner, see figure 1 As shown, it includes a valve body 11, and the valve body 11 is provided with a first inlet passage 12 for introducing high-pressure liquid refrigerant, a first outlet passage 13 for leading out low-pressure refrigerant, and a second inlet for introducing low-pressure refrigerant gas. Channel 14, the second outlet channel 15 that leads to low-pressure refrigerant gas, the first inlet channel 12 communicates with the condenser 16 outlet of the air-conditioning and refrigeration device; the first outlet channel 13 communicates with the evaporator 17 inlet of the air-conditioning and refrigeration device, and is used to export A val...

AI Technical Summary

Problems solved by technology

[0002] At present, the thermostatic expansion valve used on the vehicle air conditioner, see figure 1 As shown, it includes a valve body 11, and the valve body 11 is provided with a first inlet passage 12 for introducing high-pressure liquid refrigerant, a first outlet passage 13 for leading out low-pressure refrigerant, and a second inlet for introducing low-pressure refrigerant gas. Channel 14, the second outlet channel 15 that leads to low-pressure refrigerant gas, the first inlet channel 12 communicates with the condenser 16 outlet of the air-conditioning and refrigeration device; the first outlet channel 13 communicates with the evaporator 17 inlet of the air-conditioning and refrigeration device, and is used to export A valve chamber 18 is provided in the valve body 11, the valve chamber 18 communicates with the first inlet passage 12 and its lower end opens on the bottom surface of the valve body, and a valve hole 19 is opened in the valve chamber 18 , and the spool part 10 which is arranged on the inlet valve seat of the valve hole to open and close the valve hole 19 by contacting or separating; Because the first inlet passage 12 leading to the high-pressure liquid refrigerant is directly connected with the valve chamber 18, when the high-pressure liquid refrigerant that needs to be throttled flows in from the top of the rotating rod, it is easy to cause the vibration of the transmission rod and generate noise. At the same time, when the automobile air conditioner is turned off, the pressure of the first inlet channel of the existing thermal expansion valve is greater than the pressure of the first outlet channel, and the valve core part 10 moves towards the direction of the valve hole 19, and the valve hole of the thermal expansion valve is subjected to the pressure of the refrigeration system. And off, that is to say, the high pressure of the condenser of the refrigeration system of the automobile air conditioner and the low pressure of the evaporator cannot be balanced, which brings difficulties to the restart of the refrigeration system, increases the power requirement at the time of startup, and increases energy consumption. Moreover, the expansion valve composed of the above-mentioned structure mainly controls the gap between the coils of the spring to refine the air bubbles in the refrigerant, thereby reducing noise, but only controlling the gap between the coils of the spring cannot make the refrigerant The bubbles in the valve are completely refined, because the refrigerant can flow along the gap between the spring and the valve chamber, and not necessarily through the gap between the coils of the spring. In addition, the expansion valve requires the gap between the coils of the spring The smaller the gap, the more effective coils of the spring and the higher the consumption of material

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