阅读说明：本技术 一种精密空调压缩机的回油控制方法 (Oil return control method of precision air conditioner compressor ) 是由 金贝 于 2019-10-09 设计创作，主要内容包括：本发明公开了一种精密空调压缩机的回油控制方法,包括步骤为：打开精密空调,并使所述精密空调内的管路连通,保持压力平衡；启动压缩机,将压缩机排出的油气混合物进入到油分离器中并将油气混合物分离,油位于所述油分离器中；所述油分离器中的油通过回油管路返回至压缩机,所述回油管路包括通用管路和并联管路,其中所述并联管路的开关根据所述压缩机的工作频率确定；当所述回油管路全部开启时,确定所述油分离器中的油面高度,调整所述压缩机的工作频率。通过上述方式,本发明能够确保回油量,提高回油效率,能够保证压缩机的正常运行,提高了压缩机和整个精密空调的可靠运行,改善了精密空调的工作性能。(The invention discloses an oil return control method of a precision air conditioner compressor, which comprises the following steps: opening a precision air conditioner, communicating pipelines in the precision air conditioner, and keeping pressure balance; starting a compressor, feeding an oil-gas mixture discharged by the compressor into an oil separator, and separating the oil-gas mixture, wherein oil is filled in the oil separator; the oil in the oil separator returns to the compressor through an oil return pipeline, the oil return pipeline comprises a general pipeline and a parallel pipeline, and a switch of the parallel pipeline is determined according to the working frequency of the compressor; and when the oil return pipeline is completely opened, determining the height of the oil surface in the oil separator, and adjusting the working frequency of the compressor. By the mode, the oil return quantity can be ensured, the oil return efficiency is improved, the normal operation of the compressor can be ensured, the reliable operation of the compressor and the whole precision air conditioner is improved, and the working performance of the precision air conditioner is improved.)

1. An oil return control method of a precision air conditioner compressor is characterized by comprising the following steps: (1) opening a precision air conditioner, communicating pipelines in the precision air conditioner, and keeping pressure balance; (2) starting a compressor, feeding an oil-gas mixture discharged by the compressor into an oil separator, and separating the oil-gas mixture, wherein oil is filled in the oil separator; (3) the oil in the oil separator returns to the compressor through an oil return pipeline, the oil return pipeline comprises a general pipeline and a parallel pipeline, and a switch of the parallel pipeline is determined according to the working frequency of the compressor; (4) and when the oil return pipeline is completely opened, determining the height of the oil surface in the oil separator, and adjusting the working frequency of the compressor.

2. The oil return control method of the precision air conditioner compressor according to claim 1, wherein after the precision air conditioner is turned on in step (1), whether the precision air conditioner meets the operation condition is judged according to display data of the precision air conditioner operation.

3. The oil return control method of the precision air conditioner compressor as claimed in claim 1, wherein the pipeline communication in the precision air conditioner in the step (1) is that a valve in the pipeline is opened by a controller.

4. The oil return control method of the precision air conditioner compressor as claimed in claim 1, wherein the gas separated in the oil separator in step (2) enters the refrigerant circulation pipeline through an air outlet of the oil separator.

5. The oil return control method of the precision air conditioner compressor as claimed in claim 1, wherein in step (3), a first return capillary is disposed in the general pipeline, a second return capillary is disposed in the parallel pipelines, and the diameter of the second return capillary in each parallel pipeline is equal.

6. The oil return control method of the precision air conditioner compressor as claimed in claim 5, wherein the diameter of the first return capillary in step (3) is N, the number of the second return capillary is N, and the diameter of the second return capillary is N/N.

7. The oil return control method of a precision air conditioner compressor as claimed in claim 1, wherein the general pipeline in step (3) is in a normal open state.

8. The oil return control method of a precision air conditioner compressor as claimed in claim 1, wherein the plurality of parallel pipes in step (3) are communicated one by one.

9. The oil return control method of a precision air conditioner compressor as claimed in claim 1, wherein the operating frequency of the compressor in step (4) is in corresponding relation to the height of the oil surface in the oil separator.

10. The oil return control method of a precision air conditioner compressor as claimed in claim 1, wherein the controller in step (4) controls the operating frequency of the compressor.

Technical Field

The invention relates to the technical field of precision air conditioners, in particular to an oil return control method of a precision air conditioner compressor.

Background

The precision air conditioner, also called as a constant temperature and humidity air conditioner, is a special precision air conditioner for a machine room, which can fully meet the requirements of environmental conditions of the machine room, and is a new machine type which is gradually developed in the last 30 years. The precision air conditioner has the characteristics of large air volume and heat load change, and is widely applied to places such as libraries, archives, banknote printing factories and the like. The low-harmonic precision air conditioner is one of precision air conditioners and is also widely applied. The compressor is an important component of the precision air conditioner, and the problem of oil loss of the compressor can be caused in the running process of the precision air conditioner compressor, so that the normal oil return of the precision air conditioner under various working conditions can not be ensured.

Disclosure of Invention

The invention mainly solves the technical problem of providing an oil return control method of a precision air conditioner compressor, which has good use effect.

In order to solve the technical problems, the invention adopts a technical scheme that: the oil return control method of the precision air conditioner compressor comprises the following steps: (1) opening a precision air conditioner, communicating pipelines in the precision air conditioner, and keeping pressure balance; (2) starting a compressor, feeding an oil-gas mixture discharged by the compressor into an oil separator, and separating the oil-gas mixture, wherein oil is filled in the oil separator; (3) the oil in the oil separator returns to the compressor through an oil return pipeline, the oil return pipeline comprises a general pipeline and a parallel pipeline, and a switch of the parallel pipeline is determined according to the working frequency of the compressor; (4) and when the oil return pipeline is completely opened, determining the height of the oil surface in the oil separator, and adjusting the working frequency of the compressor.

In a preferred embodiment of the present invention, after the precision air conditioner is turned on in step (1), whether the precision air conditioner satisfies the operation condition is determined according to display data of the precision air conditioner operation.

In a preferred embodiment of the present invention, in the step (1), the pipeline in the precision air conditioner is communicated with each other by opening a valve in the pipeline through a controller.

In a preferred embodiment of the present invention, the gas separated in the oil separator in step (2) enters the refrigerant circulation pipeline through the gas outlet of the oil separator.

In a preferred embodiment of the present invention, in the step (3), a first return capillary is disposed in the common pipe, a second return capillary is disposed in the parallel pipes, and the diameter of the second return capillary in each of the parallel pipes is equal.

In a preferred embodiment of the present invention, in step (3), the diameter of the first reflow capillary is N, the number of the second reflow capillaries is N, and the diameter of the second reflow capillary is N/N.

In a preferred embodiment of the present invention, the general pipeline in step (3) is in a normal open state.

In a preferred embodiment of the present invention, in the step (3), a plurality of the parallel pipelines are communicated one by one.

In a preferred embodiment of the present invention, in the step (4), the operating frequency of the compressor corresponds to the oil level in the oil separator.

In a preferred embodiment of the present invention, the controller controls the operating frequency of the compressor in step (4).

The invention has the beneficial effects that: the oil return control method of the precision air conditioner compressor can ensure the oil return amount, improve the oil return efficiency, ensure the normal operation of the compressor, improve the reliable operation of the compressor and the whole precision air conditioner and improve the working performance of the precision air conditioner.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The oil return control method of the precision air conditioner compressor comprises the following steps:

(1) and opening the precision air conditioner, judging whether the precision air conditioner meets the operation condition according to display data of the precision air conditioner, if so, entering an operation state, and if not, debugging the precision air conditioner to enable the precision air conditioner to normally operate.

(2) The controller in the precision air conditioner can open all the valves in the pipeline, so that the pipeline in the precision air conditioner is communicated, pressure balance is kept, and the compressor is started.

(3) Starting a compressor, feeding an oil-gas mixture discharged by the compressor into an oil separator, separating the oil-gas mixture, filling oil into the oil separator, feeding the separated gas into a refrigerant circulation pipeline through an air outlet of the oil separator, and performing refrigeration or heating circulation;

(4) the oil in the oil separator returns to the compressor through an oil return pipeline, the oil return pipeline comprises a general pipeline and a parallel pipeline, and a switch of the parallel pipeline is determined according to the working frequency of the compressor;

(5) the universal pipeline is internally provided with a first reflux capillary tube, the parallel pipelines are internally provided with a second reflux capillary tube, the diameter of the second reflux capillary tube in each parallel pipeline is equal, the diameter of the first reflux capillary tube is N, the number of the second reflux capillary tubes is N, and the diameter of the second reflux capillary tube is N/N.

(6) The general pipeline and the parallel pipeline are provided with electromagnetic valves, and the controller controls the on-off of the electromagnetic valves; the general pipeline is in a normal open state; the oil level height in the oil separator is set, and the oil level height value in the oil separator can ensure that the compressor can return oil normally in the running process of the precision air conditioner, namely, the oil storage amount in the oil separator cannot be excessive, otherwise, the oil amount in the compressor is insufficient.

(7) When the working frequency of the compressor is gradually increased from 0Hz and the oil level in the oil separator is a set value when the oil level in the oil separator is reached, the working frequency of the compressor is A1, when the working frequency of the compressor is continuously increased, the controller opens the electromagnetic valves on the parallel pipelines, and the parallel pipelines are communicated one by one along with the continuous increase of the working frequency of the compressor so as to meet the oil return requirement.

(8) And when the oil return pipeline is completely opened, determining the height of the oil surface in the oil separator, and adjusting the working frequency of the compressor.

(9) Specifically, the working frequency of the compressor and the oil level height in the oil separator are in a corresponding relation, and the corresponding relation is measured in advance through experiments; according to the corresponding relation, the target working frequency of the compressor corresponding to the height of the oil surface in the oil separator is obtained, and the controller controls and adjusts the working frequency of the compressor to enable the working frequency to be adjusted to the target working frequency, so that the oil return amount is ensured.

(10) The oil return control method of the precision air conditioner compressor also relates to a four-way valve, a condenser, an evaporator and a gas-liquid separator, wherein oil flowing out of the oil return pipeline enters the gas-liquid separator. And the gas separated by the oil separator enters a condenser through a four-way valve and enters the gas-liquid separator through an evaporator. Through the separation effect of the gas-liquid separator, the separated gaseous refrigerant can carry a small amount of refrigeration oil to enter the compressor, and the normal operation of the compressor is ensured. The principle is the existing principle process in the existing precision air conditioner.

The invention has the beneficial effects that:

the oil return control method of the precision air conditioner compressor can ensure oil return amount, improve oil return efficiency and ensure normal operation of the compressor;

and secondly, the oil return control method of the precision air conditioner compressor improves the reliable operation of the compressor and the whole precision air conditioner and improves the working performance of the precision air conditioner.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.