CN211926179U - Air conditioner control system based on evaporation pressure regulating valve - Google Patents
Air conditioner control system based on evaporation pressure regulating valve Download PDFInfo
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- CN211926179U CN211926179U CN201922305925.8U CN201922305925U CN211926179U CN 211926179 U CN211926179 U CN 211926179U CN 201922305925 U CN201922305925 U CN 201922305925U CN 211926179 U CN211926179 U CN 211926179U
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Abstract
The utility model discloses an air-conditioning control system based on an evaporation pressure regulating valve, which comprises a compressor, a condenser, a liquid storage tank, an expansion valve, an evaporator and an evaporation pressure regulating valve which are sequentially and circularly connected by a connecting pipeline, wherein the evaporation pressure is preset by the evaporation pressure regulating valve, when making the evaporimeter load take place to change fast by a wide margin, can adjust the refrigerant flow in real time, make it control evaporating pressure in the within range of predetermineeing, refrigerating system can not produce under the low-load operating mode because of evaporating temperature hangs down condensation or the phenomenon of frosting that leads to excessively low, the utility model discloses be equipped with electric adjusting mechanism among the well evaporating pressure governing valve, can realize the intelligent regulation of predetermineeing the pressure value in the evaporating pressure governing valve through electric adjusting mechanism to the realization is to the more accurate control of air conditioner air supply temperature.
Description
Technical Field
The utility model relates to a data center server rack and other ICT electronic equipment air conditioning field, concretely relates to air conditioner control system based on evaporating pressure governing valve.
Background
At present, a data center server cabinet and other ICT electronic equipment have strict requirements on the operating environment temperature, and an air conditioning system is mostly arranged in the data center server cabinet and other ICT electronic equipment, so that the refrigeration of the internal environment is carried out, and the damage of components due to overhigh temperature is prevented. The final exhaust temperature of electronic equipment such as a server is generally between 35 ℃ and 40 ℃ due to different designs of internal heating value and ventilation volume. The air inlet temperature of the server equipment is strictly specified by various manufacturers and industries, and under the most ideal condition (according to a national standard A-level data center), the air inlet temperature is between 22 ℃ and 24 ℃, and the temperature range can ensure the normal internal environment of the machine and enable all parts to work normally. Meanwhile, the highest inlet air temperature of the server is generally considered to be not higher than 28 ℃, otherwise, the heat protection or shutdown of the machine can be caused.
Nowadays, data center server cabinet air conditioners all adopt traditional air conditioner control systems to refrigerate servers and other ICT electronic equipment. The cooling capacity of the air conditioner is generally configured according to the maximum heating load of the server equipment, and in the actual operation process, the server equipment is in a low power consumption state most of the time, and at this time, the following two problems are generally caused:
1. the intermittent refrigeration causes the temperature of the server to rise rapidly in a short time. Because the server cabinet is a closed space, the air volume is small under the condition of full equipment, and the air inlet and the air outlet of the server equipment are directly connected with the air inlet and the air outlet of the cabinet air conditioner under the general condition, a circulating closed ventilation loop of equipment heating, air conditioner refrigerating and equipment heating is formed. The traditional air conditioner control system controls the start and stop of the compressor by the set temperature, and the matching of the refrigerating capacity and the thermal load of equipment is guaranteed. When the compressor starts to refrigerate, the set temperature (air supply temperature or air return temperature) is reduced, when the temperature reaches the set value, the compressor is stopped so as to shut down the refrigeration, at the moment, the temperature starts to rise again, and when the temperature rises back to the set start value, the compressor is restarted to continue the refrigeration. In such an air conditioning control system, since the circulation closed ventilation loop is formed inside the server cabinet, once the compressor stops refrigerating, the exhaust air of the server equipment directly enters the air inlet of the server through the air conditioning ventilation loop, so that the inlet air temperature of the server is rapidly increased to be higher than 10 ℃, and the circulation temperature of each ventilation is increased again. In addition, because the compressor is mostly provided with restart delay protection, namely, the compressor needs to be restarted at intervals after being stopped (the time is about 3 minutes), when the compressor is restarted, the environment of the server equipment is over-temperature seriously, and the whole air conditioning system is possibly stopped, so that the refrigeration work of the air conditioning system is influenced. And if the restart delay of the compressor is not set, the service life of the compressor is easily damaged by frequent starting.
2. The problem of condensation. If the discontinuous working mode of the air conditioning system is set to be continuous and uninterrupted working, the phenomenon of condensation of the air inlet of the server is caused by the fact that the air supply temperature is continuously too low under the condition of low load. The traditional air conditioning system adopts an expansion valve to adjust the evaporation flow of an evaporator, when the heat load is reduced, the superheat degree is reduced, the opening degree of the expansion valve is also reduced, the flow is also reduced, the evaporation pressure and the evaporation temperature are also reduced at the moment, and meanwhile, the temperature of an air outlet of the evaporator is also continuously reduced. Therefore, under the condition of continuous work, the temperature of the air supplied inside the service cabinet is continuously reduced, and the cabinet door is condensed due to the fact that the server cabinet is not sealed tightly or the air inlet position does not have heat insulation. Under the condition that the filter screen is arranged at the air inlet of some servers, the phenomenon of condensation and water condensation inside the server equipment can be caused.
Therefore, the existing service machine cabinet air conditioning system has short-time severe overtemperature and condensation water trouble caused by refrigeration interruption under a low-load working condition.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide an adopt evaporating pressure governing valve's air conditioning system to thereby reach and adjust the purpose that the refrigeration is interrupted and these two problems of condensation under the low-load operating mode is solved to the refrigerating output through control evaporating pressure and evaporating temperature.
The utility model adopts the technical proposal that: the utility model provides an air conditioner control system based on evaporation pressure governing valve, includes compressor, condenser, liquid storage pot, expansion valve, evaporimeter and the evaporation pressure governing valve that loop connection in proper order is got up with the connecting line, the evaporation pressure governing valve is used for controlling the evaporation pressure in the evaporimeter.
Further, an electric adjusting mechanism is arranged on the evaporation pressure adjusting valve and used for adjusting the preset pressure value inside the evaporation pressure adjusting valve.
Furthermore, the electric adjusting mechanism comprises a driving assembly and a limiting assembly, the driving assembly is used for driving the evaporation pressure adjusting valve square adjusting rod to move, and the limiting assembly is used for limiting the moving distance of the evaporation pressure adjusting valve square adjusting rod.
Further, the driving assembly comprises a motor, a speed reducer, a first gear and a second gear, the motor is connected with the speed reducer, the first gear is installed on an output shaft of the speed reducer and meshed with the second gear, and an inner ring of the second gear is connected with a four-way adjusting rod of the evaporation pressure adjusting valve.
Furthermore, the limiting assembly comprises a first travel switch and a second travel switch, and the round tail of the four-direction adjusting rod is located between the first travel switch and the second travel switch.
Further, the air conditioner control system based on the evaporation pressure regulating valve is further provided with a sensor and a controller, the sensor is used for sensing the air supply temperature of the air conditioner, and the controller is used for driving the electric adjusting mechanism to adjust the preset pressure value.
The utility model has the advantages that:
1. the utility model discloses in, the opening degree of evaporating pressure governing valve through valve mouth, the control gets into the refrigerant flow of compressor induction port from the evaporimeter, when the evaporimeter load increases and leads to evaporating pressure to rise, spring pressure is overcome to the valve rod and valve mouth is opened greatly to this lets the refrigerant flow that the evaporimeter flowed increase, thereby makes evaporating pressure reduce, and makes it keep at the within range of setting value. Conversely, if the evaporator load decreases and the evaporation pressure decreases, the valve port is closed down, and the refrigerant flowing out of the evaporator decreases, thereby increasing the evaporation pressure back to the set value range. And the whole process is continuously operated, even if the load of the evaporator is rapidly changed to a large extent, the refrigeration system is not interrupted, and the stable and safe operation environment of the equipment in the server cabinet is ensured.
2. The utility model discloses in, be equipped with electronic adjustment mechanism in the evaporation pressure regulating valve, can realize the intelligent regulation of preset pressure value in the evaporation pressure regulating valve through electronic adjustment mechanism to realize the real-time regulation to refrigerating system evaporation temperature, in order to reach more accurate control to air conditioner air supply temperature, guarantee the air-out temperature of air conditioner between 22 ℃ to 24 ℃, with this guarantee server operation in an optimum environment;
3. the utility model discloses in, through electric adjusting mechanism's spacing subassembly, make evaporating pressure regulating valve's pressure control in a safe scope of system to with this with evaporating temperature control between 10 ℃ to 15 ℃, thereby let the evaporimeter when low-load operating condition, can not take place condensation phenomenon yet.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the evaporation pressure regulating valve and the electric adjusting mechanism of the present invention;
fig. 3 is a sectional view of the evaporation pressure regulating valve and the electric adjusting mechanism of the present invention.
The device comprises an evaporator 1, an evaporation pressure regulating valve 2, an evaporation pressure regulating valve 3, an electric regulating mechanism 4, a compressor 5, a condenser 6, a liquid storage tank 7, an expansion valve 8, a connecting pipeline 31, a driving component 32, a limiting component 200, a pressure testing port 201, a main body cylinder 202, a valve rod 203, a corrugated pipe spring 204, a connecting spring 205, a regulating cylinder 206, a square regulating rod 310, a motor 311, a speed reducer 312, a first gear 313, a second gear 321, a first travel switch 322 and a second travel switch.
Detailed Description
The present invention will be further explained with reference to the embodiments of the drawings.
As shown in fig. 1, the utility model adopts the technical scheme that: an air conditioner control system based on an evaporation pressure regulating valve comprises a compressor 4, a condenser 5, a liquid storage tank 6, an expansion valve 7, an evaporator 1 and an evaporation pressure regulating valve 2 which are sequentially and circularly connected by a connecting pipeline 8, wherein the compressor 4 is used for compressing air into high-temperature and high-pressure gas and conveying the gas into the condenser 5 by the connecting pipeline 8, the condenser 5 condenses the gas into normal-temperature and high-pressure liquid, the normal-temperature and high-pressure liquid is throttled and reduced into low-temperature and low-pressure liquid by the expansion valve 7, the low-temperature and low-pressure gas is evaporated by the evaporator 1, and the heat of the outside air (the heat generated by heating of a server device in a cabinet) is absorbed, so that the refrigeration effect is achieved, the evaporation pressure regulating valve 2 is used for controlling the evaporation pressure of the evaporator 1, and when the load of the evaporator is rapidly and greatly changed (, the refrigerant flow can be quickly adjusted to meet the changing demand of the refrigerating capacity.
As shown in fig. 2 and 3, the evaporation pressure regulating valve 2 is provided with an electric adjusting mechanism 3, the electric adjusting mechanism 3 includes a driving component 31 and a limiting component 32, the driving component 31 is connected with the square adjusting rod 206 of the evaporation pressure regulating valve 2 and drives the square adjusting rod 206 to reciprocate, so as to change the length of the connecting spring 204 and the acting force applied on the valve rod 202, so that the valve rod 202 generates a small displacement, thereby adjusting the preset pressure value of the evaporation pressure regulating valve 2.
The main body cylinder 201 and the adjustment cylinder 205 are connected by a screw, and the internal pressure of the evaporation pressure adjustment valve 2 is roughly adjusted when the evaporation pressure adjustment valve is installed.
And a pressure test port 200 is formed in the side edge of the evaporation pressure regulating valve 2, and the pressure test port 200 is used for installing a pressure gauge for detecting pressure.
The air inlet channel of the evaporation pressure regulating valve 2 is communicated with the evaporator, when the load of the evaporator increases and the evaporation pressure is higher than a preset pressure value, the four-way regulating rod 206 pushes the valve rod 202 to move towards the regulating cylinder 205, so that the damping of the refrigerant flowing through the valve port is reduced, the refrigerant flowing out of the evaporator is increased, and the evaporation pressure is reduced and returns to the range of a set value; when the load of the evaporator is continuously reduced and the evaporation pressure is reduced and is lower than the preset pressure value, the valve rod 202 begins to return, the valve opening damping is increased, the refrigerant flowing out of the evaporator is reduced, and therefore the evaporation pressure is increased and returns to the range of the set value.
The electric adjusting mechanism 3 is used for adjusting the preset pressure value of the evaporation pressure adjusting valve 2, can realize automatic adjustment of valve pressure, and meets the requirement of more accurate control on air supply temperature of the air conditioner through real-time adjustment of evaporation temperature in the air conditioner operation process.
Wherein, the driving assembly 31 comprises a motor 310, a speed reducer 311, a first gear 312 and a second gear 313, the motor 310 is connected with the speed reducer 311, the first gear 312 is mounted on an output shaft of the speed reducer 311, the first gear 312 is engaged with the second gear 313, an inner ring of the second gear 313 is connected with the four-direction adjusting rod 206 of the evaporation pressure adjusting valve 2, the motor 310 provides power to drive the rotation of the four-direction adjusting rod 206, the axial movement is generated through the threaded engagement of the four-direction adjusting rod and the adjusting cylinder 206, and the pulling force of the four-direction adjusting rod 206 is applied to the valve rod 202 through the connecting spring 204, so as to change the contact pressure of the valve rod 202 and the inner wall of the main body cylinder 201, thereby adjusting the preset pressure value of the valve, meanwhile, a bellows spring 203 is further arranged inside the valve, the bellows spring 203 is connected with the valve rod 202, and is mutually restricted with the connecting spring 204, thereby maintaining the valve rod 202 at a certain pressure value, wherein the four-way adjusting rod 206 is in meshed connection with the adjusting cylinder 205 of the evaporation pressure adjusting valve 2, thereby accommodating the rotation of the second gear 313.
Wherein, the limiting component 32 includes a first travel switch 321 and a second travel switch 322, the circular tail of the four-direction adjusting rod 206 is located between the first travel switch 321 and the second travel switch 322, the first travel switch 321 and the second travel switch 322 are used to limit the moving range of the four-direction adjusting rod 206, so as to control the fluid pressure inside the evaporation pressure regulating valve 2, when the tail of the four-direction adjusting rod 206 moves to the travel switch and triggers the switch, a controller (not shown in the figure) will stop the driving component, so as to regulate and limit the preset pressure value inside the evaporation pressure regulating valve 2 within the safe operating range of the refrigeration system,
the utility model discloses in adjust the temperature of evaporimeter 1 through evaporating pressure governing valve 2, when evaporimeter 1 internal temperature is low and leads to the air conditioner air supply temperature to be less than the given scope, improve evaporating pressure governing valve 2's preset pressure value through electronic adjustment mechanism 3 to this increases the evaporating pressure of evaporimeter 1, thereby improves the evaporating temperature of evaporimeter 1, makes the air conditioner air supply temperature rise again and get back to the given scope; on the contrary, when the air-conditioning supply air temperature is higher than the given range due to the overhigh evaporation temperature of the evaporator 1, the preset pressure value of the evaporation pressure regulating valve 2 is reduced through the electric regulating mechanism 3, so that the evaporation temperature of the evaporator 1 is reduced, and the air-conditioning supply air temperature is reduced to return to the given range again. The evaporation temperature of the evaporator 1 is regulated and controlled by the evaporation pressure regulating valve 2, when the load of the evaporator changes, the air supply temperature of the air conditioner can be quickly and stably in a given range, and the continuous operation of the refrigerating system is kept in the whole regulation and control process, so that the uninterrupted refrigeration of the air conditioner system can be realized. Meanwhile, the preset pressure value of the evaporation pressure regulating valve 2 is limited within a certain range, so that the evaporation temperature is controlled between 10 ℃ and 15 ℃, and the condensation phenomenon can not occur even if the evaporator is in a low-load working state.
The above is only the preferred embodiment of the present invention, the present invention is not limited to the above embodiment, there may be local minor structural modification in the implementation process, if it is right that various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, and belong to the claims and the equivalent technical scope of the present invention, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. The utility model provides an air conditioner control system based on evaporating pressure governing valve which characterized in that: the system comprises a compressor, a condenser, a liquid storage tank, an expansion valve, an evaporator and an evaporation pressure regulating valve which are sequentially and circularly connected by a connecting pipeline, wherein the evaporation pressure regulating valve is used for controlling the evaporation pressure in the evaporator; the evaporation pressure regulating valve is provided with an electric regulating mechanism which is used for regulating a preset pressure value inside the evaporation pressure regulating valve; the electric adjusting mechanism comprises a driving assembly and a limiting assembly, the driving assembly is used for driving the evaporation pressure adjusting valve square adjusting rod to move, and the limiting assembly is used for limiting the moving distance of the evaporation pressure adjusting valve square adjusting rod.
2. An evaporation pressure regulating valve based air conditioning control system according to claim 1, wherein: the driving assembly comprises a motor, a speed reducer, a first gear and a second gear, the motor is connected with the speed reducer, the first gear is installed on an output shaft of the speed reducer and meshed with the second gear, and an inner ring of the second gear is connected with a four-direction adjusting rod of the evaporation pressure adjusting valve.
3. An evaporation pressure regulating valve based air conditioning control system according to claim 1, wherein: the limiting assembly comprises a first travel switch and a second travel switch, and the round tail of the four-direction adjusting rod is located between the first travel switch and the second travel switch.
4. An evaporation pressure regulating valve based air conditioning control system according to claim 1, wherein: the air conditioner is characterized by further comprising a sensor and a controller, wherein the sensor is used for sensing the air supply temperature of the air conditioner, and the controller is used for driving the electric adjusting mechanism to adjust the preset pressure value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305925.8U CN211926179U (en) | 2019-12-20 | 2019-12-20 | Air conditioner control system based on evaporation pressure regulating valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305925.8U CN211926179U (en) | 2019-12-20 | 2019-12-20 | Air conditioner control system based on evaporation pressure regulating valve |
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| CN211926179U true CN211926179U (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963866A (en) * | 2023-01-10 | 2023-04-14 | 江苏拓米洛高端装备股份有限公司 | Evaporation pressure adjusting system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963866A (en) * | 2023-01-10 | 2023-04-14 | 江苏拓米洛高端装备股份有限公司 | Evaporation pressure adjusting system and method |
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