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Device and method for pressure control, enabling maintenance of unit positive pressure, and air conditioning device

A pressure control and unit technology, applied in mechanical equipment, lighting and heating equipment, refrigerators, etc., can solve problems such as easy air infiltration and refrigerant mixing

Inactive Publication Date: 2020-05-05
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a pressure control device, method and air-conditioning equipment for maintaining the positive pressure of the unit to solve the problem in the prior art that when the unit is in a negative pressure state, the air is easy to infiltrate into the chiller system and mix with the refrigerant

Method used

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  • Device and method for pressure control, enabling maintenance of unit positive pressure, and air conditioning device
  • Device and method for pressure control, enabling maintenance of unit positive pressure, and air conditioning device
  • Device and method for pressure control, enabling maintenance of unit positive pressure, and air conditioning device

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Embodiment 1

[0055] This embodiment provides a pressure control device for maintaining the positive pressure of the unit, figure 1 is a structural diagram of a pressure control device according to an embodiment of the present invention, such as figure 1As shown, the device includes: a pressure sensor 11 arranged inside the condenser 1 for detecting the internal pressure of the condenser; a heater 12 used for heating the refrigerant inside the condenser 1 to improve the condenser Internal pressure; controller 13, one end is connected to the pressure sensor 11, and the other end is connected to the heater 12, which is used to control the opening or closing of the heater 12 according to the internal pressure of the condenser when the unit is shut down .

[0056] In a specific implementation, the number of the heater 12 may be one, two, or multiple. In this embodiment, in order to achieve uniform heating of the condenser 1 . There are two heaters 12, and those skilled in the art can set diff...

Embodiment 2

[0066] Another optional embodiment of the present invention will be described in detail below by taking a water chiller as an example. This embodiment provides a pressure control device, Image 6 is a structural diagram of a pressure control device according to yet another embodiment of the present invention, such as Image 6 As shown, the device includes: a pressure sensor 611, an electric heater 612, and a controller (not shown in the figure).

[0067] In this embodiment, the pressure sensor 611 is arranged at the top of the inner space of the condenser 61. The top of the condenser 61 of the chiller is a gas refrigerant, and the bottom is a liquid refrigerant. The internal pressure of the entire condenser 61 is balanced, so the pressure sensor 611 It is arranged on the top of the condenser 61, and is used to detect the internal gas pressure of the condenser 61, that is, the condensation pressure;

[0068] In this embodiment, the electric heater 612 is arranged inside the co...

Embodiment 3

[0073] This embodiment provides a pressure control method, which is applied to the pressure control device in Embodiment 2, Figure 7 It is a flowchart of a pressure control method according to an embodiment of the present invention, such as Figure 7 As shown, the method includes:

[0074] S1, judging the operating state of the chiller, specifically, realizing the judgment of the operating state of the cold random group through the main controller, and the operating state includes the shutdown state and the startup state;

[0075] S2, when it is detected that the chiller is turned on, the electric heater is controlled to keep off to avoid waste of heat, and at the same time, the refrigerant purification device can also be controlled to purify the system refrigerant.

[0076] S3, when it is detected that the unit is in the shutdown state, judge the relationship between the condensing pressure Pc and the first preset value, wherein the first preset value is set according to th...

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Abstract

The invention discloses a device and method for pressure control, enabling maintenance of a unit positive pressure, and an air conditioning device. The device comprises a pressure sensor, a heater anda controller, wherein the pressure sensor is disposed inside a condenser and can detect a pressure inside the condenser; the heater can heat a refrigerant inside the condenser so as to increase the pressure inside the condenser; and one end of the controller is connected to the pressure sensor and the other end is connected to the heater, and the controller can control start or stop of the heateraccording to the pressure inside the condenser under a unit halt state. The device, method and air conditioning device disclosed by the invention have the beneficial effects that air can be effectively avoided from entering a unit system, so heat exchanging efficiency of the refrigerant is prevented from being influenced by non-condensed gas and the unit can maintain efficient running.

Description

technical field [0001] The invention relates to the field of unit technology, in particular to a pressure control device and method for maintaining positive pressure of a unit, and an air conditioner. Background technique [0002] R1233zd refrigerant has gradually become a substitute for R134a due to its advantages in ozone depletion potential (ODP) and global warming potential (GWP), as well as high refrigeration efficiency, and has become the future development trend of chillers. [0003] Although R1233zd refrigerant is superior to R134a refrigerant in terms of environmental protection and refrigeration efficiency, its physical characteristics are negative pressure refrigerants. For chillers, if the system is in a negative pressure state, air will easily infiltrate into the chiller system, which is not compatible with refrigeration. agents mixed together. When the refrigerant in the unit system is mixed with non-condensable gas, the heat transfer efficiency of the refrige...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/54F24F11/89F24F11/70F24F11/64F25B49/02
CPCF25B49/02F25B2700/195F24F11/54F24F11/64F24F11/70F24F11/89
Inventor 黄成武梁湖杨诗波蒋楠周宇钟瑞兴
Owner GREE ELECTRIC APPLIANCES INC
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