CN218544670U - Evaporation temperature control device - Google Patents
Evaporation temperature control device Download PDFInfo
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- CN218544670U CN218544670U CN202221629903.2U CN202221629903U CN218544670U CN 218544670 U CN218544670 U CN 218544670U CN 202221629903 U CN202221629903 U CN 202221629903U CN 218544670 U CN218544670 U CN 218544670U
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- evaporator
- condenser
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- regulating valve
- differential pressure
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Abstract
The utility model discloses an evaporation temperature control device, including evaporimeter, condenser, normal open type differential pressure governing valve, refrigerant pump, bypass valve. One end of the normally open type differential pressure regulating valve is connected with the air outlet of the evaporator; the other end is connected with an air inlet of the condenser; and the valve is in a full-open state all the year round, and the normally-open type pressure difference regulating valve is gradually closed along with the increase of the indoor and outdoor temperature difference. The connecting pipeline of the condenser and the evaporator further comprises a refrigerant pump, and the refrigerant pump is connected with the bypass valve in parallel. The utility model has the advantages that the normally open type pressure difference regulating valve is adopted, the outdoor temperature is too low in winter, the evaporating pressure is kept unchanged, the flow of the gaseous refrigeration working medium is kept stable, and the on-way resistance is reduced; meanwhile, the evaporation temperature is unchanged when the evaporation pressure is unchanged, and the air outlet temperature of the evaporator is higher than the condensation temperature of the evaporator, so that the condensation phenomenon of the evaporator is prevented, the refrigerating efficiency of the refrigerator is improved, and the safe operation of the data center is maintained.
Description
Technical Field
The utility model relates to an air conditioner refrigeration field, specific theory relates to an evaporation temperature control device.
Background
The existing data center air conditioning system mostly uses a natural cooling heat pipe mode in winter, heat is transferred through phase change latent heat of working media in a sealed vacuum pipe shell, the media in the heat pipe are heated and evaporated in a heating section, and after the media rise to the upper part, the media are condensed and released heat in a heat dissipation section. The heat transfer performance of the heat pipe is similar to the conductivity of a superconductor, so that the heat pipe has the characteristics of high heat transfer capacity and high heat transfer efficiency. It is widely used in the field of energy saving because of its superior heat transfer performance and technical characteristics.
However, in some severe cold areas, the outdoor temperature is too low in winter, which causes the gaseous refrigerant to be reduced to too low temperature when condensed into liquid, the condensing pressure is reduced, the pressure at the evaporator is high, so that the gaseous refrigerant is input into the condenser in a large amount under the action of pressure difference, the conveying speed of the refrigerant is higher, the on-way resistance generated in the way is higher, the condensing pressure is reduced, the evaporating pressure of the refrigerator is reduced, the evaporating temperature is reduced, the heat absorption capacity of the liquid refrigerant is reduced, and the refrigerating efficiency is reduced. And the temperature of the liquid refrigeration working medium conveyed by the condenser is too low, so that the outlet air temperature of the evaporator is easily lower than the dew point temperature of the evaporator, the condensation phenomenon is easily generated on the surface of the evaporator, the heat transfer efficiency of the refrigerator is reduced, the short circuit of the data center is also caused, and the problem of maintaining the safe and efficient operation of the refrigerator of the data center when the outdoor temperature is too cold is caused by the factors.
Disclosure of Invention
An object of the utility model is to overcome the problem that above-mentioned prior art exists, and provide an evaporation temperature controlling means, through adopting normal open type pressure differential governing valve, solved the too big evaporation temperature decline problem that leads to of the indoor and outdoor difference in temperature in winter in severe cold region.
The utility model provides a technical problem adopt following technical scheme:
an evaporation temperature control device comprises an evaporator, a condenser and a normally open type pressure difference regulating valve. The condenser, the normally open type differential pressure regulating valve and the evaporator are sequentially connected end to form a circulation loop; one end of the normally open type differential pressure regulating valve is connected with the air outlet of the evaporator; the other end of the normally open type differential pressure regulating valve is connected with an air inlet of the condenser; the normally open type differential pressure regulating valve is in a fully open state all the year round, but is gradually closed along with the increase of the indoor and outdoor temperature difference.
Further, the condenser is installed at a higher height than the evaporator.
Further, the condenser may be air-cooled, water-cooled or evaporation-cooled.
Further, there may be one, two or more evaporators.
Furthermore, a connecting pipeline between the condenser and the evaporator further comprises a refrigerant pump, an inlet of the refrigerant pump is connected with a liquid outlet of the condenser, and an outlet of the refrigerant pump is connected with an inlet of the evaporator.
Furthermore, the refrigerant pump is connected with the bypass valve in parallel.
The utility model has the advantages that the normally open type pressure difference regulating valve is adopted, when the outdoor temperature is too low and the condensing pressure is reduced in winter, the evaporating pressure is kept unchanged, the flow of the gaseous refrigeration working medium is kept stable, and the on-way resistance is reduced; meanwhile, the evaporation temperature is unchanged when the evaporation pressure is unchanged, and the air outlet temperature of the evaporator is higher than the dew point temperature of the evaporator, so that the phenomenon of condensation of the evaporator is prevented, the refrigeration efficiency of the refrigerator is improved, and the safe operation of the data center is maintained.
Drawings
Fig. 1, fig. 2 and fig. 3 are schematic structural views of a first embodiment of an evaporation temperature control device according to the present invention.
Fig. 4 is a schematic structural diagram of a second embodiment of the evaporation temperature control device of the present invention.
In the figure: 1. a condenser; 2. a normally open differential pressure regulating valve; 3. an evaporator; 4. a refrigerant pump; 5. a bypass valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, or the orientation or positional relationship that a person skilled in the art conventionally understands, which is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, the present invention provides an evaporation temperature control device. The first embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, includes a condenser 1, a normally open type differential pressure regulating valve 2 and an evaporator 3. The condenser 1, the normally open type differential pressure regulating valve 2 and the evaporator 3 are sequentially connected end to form a circulation loop; the normally open type differential pressure regulating valve 2 is connected with an air outlet of the evaporator 3; the normally open type differential pressure regulating valve 2 is connected with an air inlet of the condenser 1.
When the outdoor temperature is not much different from the indoor temperature, the normally open type pressure difference regulating valve 2 is in a fully open state, the state of the refrigerating medium in the refrigerator is shown in figure 1, the gaseous refrigerating medium in the evaporator 3 enters the condenser 1 through the normally open type pressure difference regulating valve 2 to be cooled, the condenser 1 has various cooling modes, air cooling, water cooling or evaporative cooling can be carried out, the liquid level of the liquid refrigerating medium in the evaporator 3 is high, and the refrigerating cycle is normally carried out. Because the pressure at the liquid outlet of the condenser 1 is low, the pressure at the gas outlet of the evaporator 3 is high, and the installation height of the condenser 1 is higher than that of the evaporator 3, the cooled liquid refrigerant is conveyed into the evaporator 3 under the action of gravity for next circulation, and the phenomenon that the liquid refrigerant cannot be conveyed into the evaporator 3 is avoided.
When the outdoor temperature is excessively lower than the indoor temperature, if the normally-open type differential pressure regulating valve 2 is not arranged or the normally-open type differential pressure regulating valve 2 is in a fully-open state, the outdoor temperature is too low, the temperature of the condenser 1 is too low, the condensing pressure is reduced, the pressure at the position of the evaporator 3 is high, gaseous refrigerating working media at the outlet of the evaporator 3 are greatly conveyed into the condenser 1 under the action of the differential pressure, the on-way resistance is increased, the efficiency of the refrigerator is reduced, the temperature of the liquid refrigerating working media in the evaporator 3 is reduced, and the condensation phenomenon is easy to occur. If the normally open type differential pressure regulating valve 2 is adjusted to be small, the refrigerating working medium in the refrigerator can be changed from the graph 1 to the graph 2, after the valve is adjusted to be small, the pressure at the evaporator 3 is increased to the original evaporation pressure, the evaporation temperature is increased, the liquid refrigerating working medium in the evaporator 3 flows back to the condenser 1 under the action of the pressure, the liquid level in the evaporator 3 is reduced, the opening degree of the valve at the moment is kept, and the refrigerating cycle can normally run.
As shown in fig. 3, when the outdoor temperature is excessively lower than the indoor temperature, in order to maintain the original evaporation temperature, after the normally open type differential pressure regulating valve 2 is adjusted to be small, if the pressure in the evaporator 3 is excessively high at this time, the liquid refrigerant in the evaporator 3 is enabled to completely flow back to the condenser 1, after the liquid refrigerant enters the condenser 1, a part of the heat exchange area of the condenser 1 is disabled, the more the liquid refrigerant enters, the more the disabled heat exchange area is, and the gravity is not enough to enable the liquid refrigerant to flow into the evaporator 3 under the pressure, at this time, the refrigeration efficiency of the refrigerator is reduced, and the refrigeration cycle is seriously stopped.
As shown in fig. 4, for the utility model discloses a second embodiment structure schematic diagram, different from the first embodiment, still added refrigerant pump 4 on the condenser 1 of this embodiment and the connecting pipeline of evaporimeter 3, the liquid outlet of the entry linkage condenser 1 of refrigerant pump 4, the entrance of the exit linkage evaporimeter 3 of refrigerant pump 4, refrigerant pump 4 and bypass valve 5 parallel connection.
When the outdoor temperature is excessively lower than the indoor temperature, in order to keep the original evaporation temperature, after the normally-open type differential pressure regulating valve 2 is adjusted to be small, if the pressure in the evaporator 3 is excessively high, the liquid refrigerant in the condenser 1 is not enough to flow into the evaporator 3 under the action of gravity, at this time, the refrigerant pump 4 is opened, the bypass valve 5 is closed, so that the liquid refrigerant is pumped back into the evaporator 3 under the action of the refrigerant pump 4, and the refrigeration cycle normally runs; on the contrary, after the normally open type differential pressure regulating valve 2 is closed, the liquid refrigerant in the condenser 1 can flow to the evaporator 3 under the action of gravity, at this time, the refrigerant pump 4 is closed, the bypass valve 5 is opened, and the liquid refrigerant flows to the evaporator 3 through the bypass valve 5.
When the outdoor temperature is lower than the indoor temperature, the normally-open type pressure difference regulating valve 2 is gradually closed from a fully-open state along with the increase of the indoor and outdoor temperature difference, the evaporation pressure is kept unchanged, if the liquid refrigeration working medium in the condenser 1 cannot flow to the evaporator 3 under the action of gravity, a refrigerant pump 4 and a bypass valve 5 need to be added, when the liquid refrigeration working medium flows back to the outlet of the condenser 1 in a pipeline, the refrigerant pump 4 is opened, the liquid refrigerant is pumped back to the evaporator 3, the gaseous refrigeration working medium enters the condenser 1 through the normally-open type pressure difference regulating valve 2 to be radiated into the liquid refrigeration working medium, the liquid refrigeration working medium exists in a supercooled water mode, if a valve is added in a circulation loop, the vaporization amount is reduced when the liquid refrigeration working medium passes through the valve, even the vaporization is not generated, and the refrigeration amount of the refrigerator is improved. Meanwhile, the liquid refrigeration working medium in the condenser 1 is conveyed to the evaporator 3, the evaporator 3 is contacted with a high-temperature heat source, and the liquid refrigeration working medium is heated by the high-temperature heat source in the evaporator 3 to be evaporated into gas and absorb heat.
The above description is only the basic embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The evaporation temperature control device is characterized by comprising an evaporator, a condenser and a normally open type differential pressure regulating valve; the condenser, the normally open type differential pressure regulating valve and the evaporator are sequentially connected end to form a circulation loop; one end of the normally open type differential pressure regulating valve is connected with the air outlet of the evaporator; the other end of the normally open type differential pressure regulating valve is connected with an air inlet of the condenser; the normally open type differential pressure regulating valve is in a fully open state all the year round, but is gradually closed along with the increase of the indoor and outdoor temperature difference.
2. The evaporating temperature control apparatus of claim 1, further characterized in that the condenser is mounted at a higher elevation than the evaporator.
3. The evaporation temperature control device of claim 2, wherein the condenser is air-cooled, water-cooled or evaporation-cooled.
4. The evaporating temperature control device of claim 2, further characterized in that there may be one, two or more evaporators.
5. The evaporating temperature control device of claim 2, further comprising a coolant pump connected to the connection line between the condenser and the evaporator, wherein an inlet of the coolant pump is connected to a liquid outlet of the condenser, and an outlet of the coolant pump is connected to an inlet of the evaporator.
6. The evaporation temperature control apparatus of claim 5, further characterized in that the refrigerant pump is connected in parallel with the bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221629903.2U CN218544670U (en) | 2022-06-28 | 2022-06-28 | Evaporation temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221629903.2U CN218544670U (en) | 2022-06-28 | 2022-06-28 | Evaporation temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218544670U true CN218544670U (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221629903.2U Active CN218544670U (en) | 2022-06-28 | 2022-06-28 | Evaporation temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218544670U (en) |
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2022
- 2022-06-28 CN CN202221629903.2U patent/CN218544670U/en active Active
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