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    Thermal expansion valve

    Thermal expansion valve Thermal expansion valves are commonly used in Freon refrigeration systems. Through the function of the temperature sensing mechanism, they automatically change with the temperature change of the refrigerant at the outlet of the evaporator to achieve the purpose of adjusting the amount of refrigerant supply. Most thermal expansion valves set the superheat to 5 ～ 6 ℃ before leaving the factory. The structure of the valve guarantees that when the superheat increases by 2 ℃, the valve will be in the fully open position. When the superheat is about 2 ℃, the expansion valve will Is off. The adjustment spring for controlling the degree of superheat has an adjustment range of 3 to 6 ° C. In general, the higher the superheat set by the thermal expansion valve, the lower the heat absorption capacity of the evaporator, because increasing the superheat takes up a considerable part of the heat transfer surface at the tail of the evaporator, so that the saturated steam is superheated here. It occupies a part of the heat transfer area of ​​the evaporator, so that the area of ​​refrigerant vaporization and heat absorption is relatively reduced, that is to say, the surface of the evaporator is not fully utilized. However, if the degree of superheat is too low, the refrigerant liquid may be brought into the compressor, which may cause an adverse phenomenon of liquid shock. Therefore, the regulation of superheat should be appropriate, not only to ensure that enough refrigerant enters the evaporator, but also to prevent liquid refrigerant from entering the compressor. The thermal expansion valve is mainly composed of a valve body, a temperature sensing bag and a capillary tube. There are two types of thermal expansion valve: internal balance type and external balance type according to the different diaphragm balance methods.

    Recent related posts

    Thermal expansion valve

    06/14/2020

    Thermal expansion valve

    Thermal expansion valve Thermal expansion valves are commonly used in Freon refrigeration systems. Through the function of the temperature sensing mechanism, they automatically change with the temperature change of the refrigerant at the outlet of the ev器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔDž༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ

    The harm and elimination method of air intake in refrigeration system

    06/14/2020

    The harm and elimination method of air intake in refrigeration system

    The harm and elimination method of air intake in refrigeration system 1 Overview In the refrigeration system, the so-called non-condensable gas means that when the refrigeration system is working, at a specific temperature and pressure in the condense器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔDž༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔDž'鱤džၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧Ӡ識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴 識杴 㥲ᐲ

    Precautions for the operation of cold storage equipment

    06/14/2020

    Precautions for the operation of cold storage equipment

    Precautions for the operation of cold storage equipment 1. For the evaporator of the air-cooled machine: always check the defrosting situation, whether the defrosting is timely and effective, it will affect the cooling effect and cause the liquid return 器2䀀ￜ皥

    Internal balance type thermal expansion valve

    06/14/2020

    Internal balance type thermal expansion valve

    Internal balance type thermal expansion valve The internal balance type thermal expansion valve is composed of valve body, push rod, valve seat, valve needle, spring, adjusting rod, temperature sensor, connecting pipe, sensing diaphragm and other compone器

    External balance thermal expansion valve

    06/14/2020

    External balance thermal expansion valve

    The difference between the external balance type thermal expansion valve and the internal balance type in structure and installation is that the space under the diaphragm of the external balance type valve is not in communication with the outlet of the va器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔDž༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔDž'鱤džၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧ۖ識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴 識杴 㥲ᐲ

    Electronic expansion valve

    06/14/2020

    Electronic expansion valve

    Electronic expansion valve The electronic expansion valve is a speed type and is used in an intelligently controlled inverter air conditioner. The advantages of the electronic expansion valve are: large flow adjustment range; high control accuracy; suita器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔDž༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥

    Cold storage operation management and compressor common fault handling

    06/14/2020

    Cold storage operation management and compressor common fault handling

    Cold storage operation management and compressor common fault handling 1. Startup and preparations Before starting the machine, check whether the valves of the unit are in the normal starting state, and check whether the cooling water source is suffic器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔDž༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔDž'鱤džၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧Ѳ識�僬㣢ᐲ臆S㥲ᐲᬄğ

    Central air-conditioning unit classification

    06/14/2020

    Central air-conditioning unit classification

    Central air-conditioning unit classification The central air conditioning unit is the core part of the central air conditioning system. Reasonable selection of units is very important for a central air-conditioning project. Regarding the cooling mode and器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔDž༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄

    Capillary

    06/14/2020

    Capillary

    The capillary tube is the simplest throttling device. The capillary tube is a very thin diameter red copper tube with a specified length. Its inner diameter is generally 0.5 to 2 mm. Characteristics of capillary tube as throttling device

    As the core system of the cold storage, what equipment does the refrigeration system contain

    06/14/2020

    As the core system of the cold storage, what equipment does the refrigeration system contain

    As the core system of the cold storage, what equipment does the refrigeration system contain Cold storage is a warehouse that uses mechanical equipment and other artificial refrigeration methods to achieve stable and low temperature. It is suitable for t器2䀀ￜ皥䖒皦즠Ʋ焬क़㲈Ʋ䌁皦ᮔDž༬皧然क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔDž'鱤džၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧Җ識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴 識

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