CN209801845U - novel refrigerating unit pipeline structure - Google Patents
novel refrigerating unit pipeline structure Download PDFInfo
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- CN209801845U CN209801845U CN201920444374.0U CN201920444374U CN209801845U CN 209801845 U CN209801845 U CN 209801845U CN 201920444374 U CN201920444374 U CN 201920444374U CN 209801845 U CN209801845 U CN 209801845U
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Abstract
The utility model discloses a novel refrigerating unit pipeline structure, which comprises a circulating pipeline formed by sequentially connecting a compressor, a condenser, a throttle valve, an evaporator and a crankcase pressure regulating valve, wherein a bypass pipe is communicated between an inlet pipe and an outlet pipe of the crankcase pressure regulating valve, a solenoid valve is arranged on the bypass pipe, and a pressure sensor positioned on the front side of the intersection point of the bypass pipe and the outlet pipe is arranged on the outlet pipe; the signal output end of the pressure sensor is connected with the signal input end of the single chip microcomputer, and the control output end of the single chip microcomputer is connected with the control input end of the electromagnetic valve. The utility model discloses simple structure easily makes, and the return air pressure that can the automatically regulated compressor avoids refrigerant too high or low harm that leads to the fact the compressor of pressure when getting into the compressor, realizes refrigerating unit's long-term steady operation, reaches and carries out the frozen cold-stored purpose of constant temperature to the goods.
Description
Technical Field
The utility model belongs to the technical field of the refrigerating unit technique and specifically relates to a novel refrigerating unit pipeline structure is related to.
Background
The refrigerating unit is generally formed by connecting a compressor, a condenser, a throttle valve and an evaporator in sequence through pipelines. When the refrigeration cycle system works, the refrigeration working medium steam enters the compressor from the evaporator, enters the condenser after the pressure is increased, is condensed into liquid with higher pressure in the condenser, is throttled by the throttle valve to form liquid with lower pressure, then is sent into the evaporator, absorbs heat in the evaporator to evaporate into steam with lower pressure, and then is sent into the inlet of the compressor, so that the refrigeration cycle is completed. In order to avoid the damage to the compressor caused by the high pressure (i.e. the over-high return pressure) of the refrigerant entering the compressor, a crankcase pressure regulating valve is usually arranged on the pipeline between the evaporator and the compressor, so that the vapor pressure of the refrigerant is greatly reduced. However, when the outside environment temperature is too low (for example, -10 ℃) or the temperature in the refrigerator set by the refrigerator set is too low (for example, -20 ℃), the return air pressure of the compressor is sometimes lower than the normal value (for example, -1 bar), and at this time, in order to avoid the damage of the compressor, the refrigerator set can be automatically stopped, which is extremely unfavorable for the requirement of constant temperature freezing and refrigerating of goods and the maintenance requirement of the refrigerator set.
Disclosure of Invention
The utility model provides a novel refrigerating unit pipeline structure, aim at solve present compressor return air pressure low excessively cause the problem that refrigerating unit shut down.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
The utility model discloses a novel refrigerating unit pipeline structure, include the circulation pipeline that is connected gradually by compressor, condenser, choke valve, evaporimeter and crankcase pressure regulating valve and constitutes, it has the bypass pipe to communicate between the inlet pipe of crankcase pressure regulating valve and the outlet pipe, be provided with the solenoid valve on the bypass pipe, be provided with the pressure sensor who is located bypass pipe and outlet pipe intersection point front side on the outlet pipe; the signal output end of the pressure sensor is connected with the signal input end of the single chip microcomputer, and the control output end of the single chip microcomputer is connected with the control input end of the electromagnetic valve.
The utility model provides a novel refrigerating unit pipeline structure, simple structure easily makes, and the return air pressure that can the automatically regulated compressor avoids refrigerant too high or low harm that leads to the fact the compressor of pressure when getting into the compressor, realizes refrigerating unit's long-term steady operation, reaches and carries out the frozen cold-stored purpose of constant temperature to the goods.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, the novel refrigerating unit pipeline structure comprises a circulating pipeline formed by connecting a compressor 1, a condenser 2, a throttle valve 3, an evaporator 4 and a crankcase pressure regulating valve 5 in sequence, a bypass pipe 5.3 is communicated between an inlet pipe 5.1 and an outlet pipe 5.2 of the crankcase pressure regulating valve 5, a solenoid valve 6 is installed on the bypass pipe 5.3, and a pressure sensor 7 located on the front side of the intersection point of the bypass pipe 5.3 and the outlet pipe 5.2 is installed on the outlet pipe 5.2. The signal output end of the pressure sensor 7 is connected with the signal input end of a single chip microcomputer, and the control output end of the single chip microcomputer is connected with the control input end of the electromagnetic valve 6.
When the pressure sensor 7 detects that the return air pressure is lower than a set value, the singlechip sends an instruction to enable the electromagnetic valve 6 to be electrified and opened from a normally closed state, so that part of the refrigerant which is not decompressed by the crankcase regulating valve 5 in the outlet pipe (namely the inlet pipe 5.1) of the evaporator 4 directly flows into the inlet pipe (namely the outlet pipe 5.2) of the compressor 1 through the electromagnetic valve 6, the return air pressure of the compressor 1 is improved, and the compressor is protected; when the return air pressure of the compressor 1 rises back to the normal range, the single chip microcomputer sends an instruction to close the electromagnetic valve 6, the refrigeration working medium enters the inlet pipe 5.1, the crankcase pressure regulating valve 5 and the outlet pipe 5.2 in sequence, and enters the compressor 1 only through the pressure regulation of the crankcase pressure regulating valve 5. The above process is repeated to maintain the stable operation of the compressor 1, thereby performing the constant temperature freezing and refrigeration of the goods for a long time.
Claims (1)
1. The utility model provides a novel refrigerating unit pipeline structure, includes the circulation line who connects gradually the constitution by compressor (1), condenser (2), choke valve (3), evaporimeter (4) and crankcase pressure regulating valve (5), its characterized in that: a bypass pipe (5.3) is communicated between an inlet pipe (5.1) and an outlet pipe (5.2) of the crankcase pressure regulating valve (5), an electromagnetic valve (6) is arranged on the bypass pipe (5.3), and a pressure sensor (7) positioned on the front side of the intersection point of the bypass pipe (5.3) and the outlet pipe (5.2) is arranged on the outlet pipe (5.2); and the signal output end of the pressure sensor (7) is connected with the signal input end of a single chip microcomputer, and the control output end of the single chip microcomputer is connected with the control input end of the electromagnetic valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444374.0U CN209801845U (en) | 2019-04-03 | 2019-04-03 | novel refrigerating unit pipeline structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444374.0U CN209801845U (en) | 2019-04-03 | 2019-04-03 | novel refrigerating unit pipeline structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209801845U true CN209801845U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920444374.0U Active CN209801845U (en) | 2019-04-03 | 2019-04-03 | novel refrigerating unit pipeline structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN209801845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556220A (en) * | 2020-12-07 | 2021-03-26 | 珠海格力电器股份有限公司 | Unit and operation control method thereof |
-
2019
- 2019-04-03 CN CN201920444374.0U patent/CN209801845U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556220A (en) * | 2020-12-07 | 2021-03-26 | 珠海格力电器股份有限公司 | Unit and operation control method thereof |
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