CN216432172U - Variable-flow thermostatic expansion valve air conditioning system - Google Patents
Variable-flow thermostatic expansion valve air conditioning system Download PDFInfo
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- CN216432172U CN216432172U CN202122952752.6U CN202122952752U CN216432172U CN 216432172 U CN216432172 U CN 216432172U CN 202122952752 U CN202122952752 U CN 202122952752U CN 216432172 U CN216432172 U CN 216432172U
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Abstract
The utility model discloses a variable flow's thermal expansion valve air conditioning system, including compressor, condenser, thermal expansion valve and evaporimeter. The exhaust port of the compressor is connected with the air inlet of the condenser through an exhaust pipe; the liquid outlet of the condenser is connected with the inlet of the thermostatic expansion valve through a high-pressure liquid pipe; the outlet of the thermostatic expansion valve is connected with the inlet of the evaporator through a low-pressure liquid pipe; the outlet of the evaporator is connected with the air inlet of the compressor through an air suction pipe; a temperature sensing bulb arranged on the thermostatic expansion valve is arranged on the air suction pipe, and a pressure balancing pipe arranged on the thermostatic expansion valve is arranged between a balancing pipe joint of the thermostatic expansion valve and an outlet of the evaporator; an electric heating rod is arranged on the air suction pipe corresponding to the installation position of the temperature sensing bulb; an exhaust temperature sensor is arranged on the exhaust pipe; the exhaust temperature sensor and the electric heating rod are in signal connection with a controller of the air conditioning system. The utility model discloses a thermal expansion valve air conditioning system can adjust the flow of refrigerant, can also the greatly reduced cost.
Description
Technical Field
The utility model relates to a thermal expansion valve air conditioning system of variable flow.
Background
As is well known, a conventional air conditioning refrigeration cycle system mainly comprises a compressor, a condenser, an evaporator, and an expansion valve, and the most commonly used expansion valves are two types: electronic expansion valves and thermostatic expansion valves.
The electronic expansion valve has the advantages that in the using process, the superheat degree can be adjusted in time according to the operating condition of the air conditioner, so that the circulation flow of the refrigerant is adjusted, and the air conditioning system can operate in the optimal state. Compared with an electronic expansion valve, the thermostatic expansion valve has the defects that in the use process, the superheat degree is certain no matter what working condition the air conditioner runs, the circulation flow of the refrigerant cannot be adjusted according to the current working condition requirement, and the requirement of the air conditioning system for the refrigerant flow cannot be met by using the thermostatic expansion valve under certain specific working conditions (such as lower environment temperature, higher exhaust temperature and the like).
With the development of air-conditioning refrigeration technology, the requirements for cost reduction and efficiency improvement of the existing air-conditioner are higher and higher. And the cost of the thermostatic expansion valve is far lower than that of the electronic expansion valve. By comparing the advantages and disadvantages of the electronic expansion valve and the thermostatic expansion valve, if the superheat degree of the thermostatic expansion valve can be changed through other ways for an air conditioning system applied to certain specific working conditions, the purpose of adjusting the flow of the refrigerant can be achieved, and the requirement of the air conditioning system on the flow of the refrigerant can be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a variable flow's thermal expansion valve air conditioning system, it can adjust the flow of refrigerant, can also greatly reduced air conditioning system's cost.
The purpose of the utility model is realized like this: a variable flow thermostatic expansion valve air conditioning system comprises a compressor, a condenser, a thermostatic expansion valve and an evaporator; the exhaust port of the compressor is connected with the air inlet of the condenser through an exhaust pipe; the liquid outlet of the condenser is connected with the inlet of the thermostatic expansion valve through a high-pressure liquid pipe; the outlet of the thermostatic expansion valve is connected with the inlet of the evaporator through a low-pressure liquid pipe; the outlet of the evaporator is connected with the air inlet of the compressor through an air suction pipe; it is characterized in that the preparation method is characterized in that,
a temperature sensing bulb arranged on the thermostatic expansion valve is arranged on the air suction pipe, and a pressure balancing pipe arranged on the thermostatic expansion valve is arranged between a balancing pipe joint of the thermostatic expansion valve and an outlet of the evaporator;
an electric heating rod is arranged on the air suction pipe corresponding to the installation position of the temperature sensing bulb;
an exhaust temperature sensor is arranged on the exhaust pipe;
and the exhaust temperature sensor and the electric heating rod are in signal connection with a controller of the air conditioning system.
In the air conditioning system using the variable flow thermostatic expansion valve, the condenser is a plate heat exchanger.
In the air conditioning system using the variable flow thermostatic expansion valve, the evaporator is a finned heat exchanger.
The utility model discloses an evaporimeter of mixed evaporation mode against current has following characteristics: the temperature and the pressure of the refrigerant at the outlet of the evaporator are detected through a temperature sensing bulb and a pressure balancing pipe of the thermostatic expansion valve, so that the opening degree of the thermostatic expansion valve is adjusted, and the superheat degree of the refrigerant at the outlet of the evaporator reaches a set value. For some working conditions requiring higher flow of the refrigerant, an electric heating rod is arranged at a temperature sensing bulb of the thermostatic expansion valve, so that the temperature detected by the temperature sensing bulb of the thermostatic expansion valve in the operation process is higher than the actual temperature of the refrigerant, and the pressure is unchanged at the moment, so that the opening degree of the thermostatic expansion valve is increased, the flow of the refrigerant is increased, and the purpose of adjusting the flow can be achieved. Because the electric heating rod has lower cost, the thermostatic expansion valve system can achieve the purpose of adjusting the flow of the refrigerant, and the cost of the air conditioning system can be greatly reduced.
Drawings
Fig. 1 is a schematic diagram of the structure of the variable flow thermostatic expansion valve air conditioning system of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the flow-variable thermostatic expansion valve air conditioning system of the present invention includes a compressor 1, a condenser 2, a thermostatic expansion valve 3, an evaporator 4, an electric heating rod 5 and an exhaust temperature sensor 6; wherein:
the exhaust port of the compressor 1 is connected with the air inlet of the condenser 2 through an exhaust pipe 20;
the liquid outlet of the condenser 2 is connected with the inlet of the thermostatic expansion valve 3 through a high-pressure liquid pipe 30; the condenser 2 adopts a plate heat exchanger;
the outlet of the thermostatic expansion valve 3 is connected with the inlet of the evaporator 4 through a low-pressure liquid pipe 40;
the outlet of the evaporator 4 is connected with the air inlet of the compressor 1 through an air suction pipe 10;
a temperature sensing bulb 3a arranged on the thermostatic expansion valve 3 is arranged on the air suction pipe 10, and a pressure balancing pipe 3b arranged on the thermostatic expansion valve 3 is arranged between a balancing pipe joint of the thermostatic expansion valve 3 and an outlet of the evaporator 4; the evaporator 4 adopts a finned heat exchanger;
the electric heating rod 5 is arranged on the air suction pipe 10 corresponding to the installation position of the temperature sensing bulb 3 a;
the exhaust gas temperature sensor 6 is mounted on the exhaust pipe 20;
the exhaust temperature sensor 6 and the electric heating rod 5 are in signal connection with a controller of the air conditioning system.
The utility model discloses a variable flow's thermal expansion valve air conditioning system, the theory of operation is:
high-temperature high-pressure gaseous refrigerant discharged by the compressor 1 enters the condenser 2 through the exhaust pipe 20 to exchange heat with water, water in the condenser 2 is heated and flows to a user side through a water path to be used by the user, meanwhile, the gaseous refrigerant releases heat and is condensed into high-temperature high-pressure liquid refrigerant, then enters the thermostatic expansion valve 3 through the high-pressure liquid pipe 30, is throttled into low-temperature low-pressure liquid refrigerant through the thermostatic expansion valve 3, then enters the evaporator 4 through the low-pressure liquid pipe 40, absorbs heat from air where the evaporator 4 is located, is evaporated into low-temperature low-pressure gaseous refrigerant, and then enters the compressor 1 through the air suction pipe 10 to be compressed, so that complete circulation of an air conditioning system is completed. The flow rate of the refrigerant in the air conditioning system is mainly determined by the opening degree of the thermostatic expansion valve 3, and the opening degree of the thermostatic expansion valve 3 is determined by the pressure difference between the pressure in the bulb 3a of the thermostatic expansion valve and the pressure in the pressure balance pipe 3b of the thermostatic expansion valve.
Under a certain specific condition, when the air conditioning system operates stably, the pressure in the thermal bulb 3a of the thermostatic expansion valve and the pressure in the pressure balance pipe 3b of the thermostatic expansion valve are unchanged, and meanwhile, the pressure difference between the two is also unchanged, so that the opening degree of the thermostatic expansion valve 3 is also unchanged, and the flow of the refrigerant of the air conditioning system is also unchanged. For a common thermostatic expansion valve air conditioning system, if the exhaust temperature detected by the exhaust temperature sensor 6 is higher, the flow demand of the system for the refrigerant is larger, but because the opening degree of the thermostatic expansion valve 3 is fixed, the flow of the system refrigerant cannot be increased by increasing the opening degree of the thermostatic expansion valve 3; and the utility model discloses a thermal expansion valve air conditioning system, if the exhaust temperature that exhaust temperature sensor 6 detected is higher, controller control electrical heating rod 5 through air conditioning system opens this moment, a temperature sensing package 3a for heating thermal expansion valve, make temperature sensing package 3 a's temperature rise, thereby make the pressure rise in thermal expansion valve's temperature sensing package 3a, because the pressure in pressure balance pipe 3b is unchangeable this moment, so the pressure differential increase in thermal expansion valve's temperature sensing package 3a and the pressure balance pipe 3b, thereby make thermal expansion valve 3's aperture increase, and then increased the flow of refrigerant. As the opening degree of the thermostatic expansion valve 3 increases, the flow rate of the refrigerant will gradually increase, the exhaust temperature detected by the exhaust temperature sensor 6 will gradually decrease, and when the exhaust temperature decreases to the set value of the system, which indicates that the flow rate demand of the system for the refrigerant is low, the controller of the air conditioning system controls the electric heating rod 5 to close, and the thermostatic expansion valve 3 will gradually return to the normal opening degree.
For the air conditioning system applied to the occasions with higher exhaust temperature, such as low environmental temperature, high water temperature and the like, the electronic expansion valve can be replaced by the thermal expansion valve, so that the cost of the air conditioning system can be greatly reduced.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (3)
1. A variable flow thermostatic expansion valve air conditioning system comprises a compressor, a condenser, a thermostatic expansion valve and an evaporator; the exhaust port of the compressor is connected with the air inlet of the condenser through an exhaust pipe; the liquid outlet of the condenser is connected with the inlet of the thermostatic expansion valve through a high-pressure liquid pipe; the outlet of the thermostatic expansion valve is connected with the inlet of the evaporator through a low-pressure liquid pipe; the outlet of the evaporator is connected with the air inlet of the compressor through an air suction pipe; it is characterized in that the preparation method is characterized in that,
a temperature sensing bulb arranged on the thermostatic expansion valve is arranged on the air suction pipe, and a pressure balancing pipe arranged on the thermostatic expansion valve is arranged between a balancing pipe joint of the thermostatic expansion valve and an outlet of the evaporator;
an electric heating rod is arranged on the air suction pipe corresponding to the installation position of the temperature sensing bulb;
an exhaust temperature sensor is arranged on the exhaust pipe;
and the exhaust temperature sensor and the electric heating rod are in signal connection with a controller of the air conditioning system.
2. The variable flowrate thermostatic expansion valve air conditioning system of claim 1 wherein the condenser employs a plate heat exchanger.
3. The air conditioning system of claim 1, wherein said evaporator comprises a finned heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122952752.6U CN216432172U (en) | 2021-11-29 | 2021-11-29 | Variable-flow thermostatic expansion valve air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122952752.6U CN216432172U (en) | 2021-11-29 | 2021-11-29 | Variable-flow thermostatic expansion valve air conditioning system |
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| CN216432172U true CN216432172U (en) | 2022-05-03 |
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| CN202122952752.6U Active CN216432172U (en) | 2021-11-29 | 2021-11-29 | Variable-flow thermostatic expansion valve air conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983726A (en) * | 2021-11-29 | 2022-01-28 | 张琛 | Variable-flow thermostatic expansion valve air conditioning system |
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2021
- 2021-11-29 CN CN202122952752.6U patent/CN216432172U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983726A (en) * | 2021-11-29 | 2022-01-28 | 张琛 | Variable-flow thermostatic expansion valve air conditioning system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221206 Address after: 200030 No. 241 Huaihai West Road, Xuhui District, Shanghai Patentee after: SHANGHAI CHEST Hospital Patentee after: CLIMAVENETA CHATUNION REFRIGERATION EQUIPMENT (SHANGHAI) Co.,Ltd. Address before: 200030 No. 241 Huaihai West Road, Xuhui District, Shanghai Patentee before: Zhang Chen Patentee before: CLIMAVENETA CHATUNION REFRIGERATION EQUIPMENT (SHANGHAI) Co.,Ltd. |
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| TR01 | Transfer of patent right |