CN206973766U - A kind of frostless low temperature dehumidification machine of hot-gas bypass - Google Patents
A kind of frostless low temperature dehumidification machine of hot-gas bypass Download PDFInfo
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- CN206973766U CN206973766U CN201720841308.8U CN201720841308U CN206973766U CN 206973766 U CN206973766 U CN 206973766U CN 201720841308 U CN201720841308 U CN 201720841308U CN 206973766 U CN206973766 U CN 206973766U
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- gas bypass
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- evaporator
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- low temperature
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- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a kind of frostless low temperature dehumidification machine of hot-gas bypass, including compressor and ventilation blower, compressor outlet connects condenser by pipeline, the outlet of condenser connects the entrance of an evaporator by pipeline, the outlet of the evaporator connects the entrance of compressor by pipeline, and evaporator, condenser, ventilation blower are set gradually；Also include hot gas bypass line, the hot gas bypass line one end connects the outlet of compressor, and the other end connects evaporator inlet, is provided with hot gas bypass valve on hot gas bypass line, heating power expansion valve is provided with the pipeline being connected with evaporator inlet.The frostless low temperature dehumidification machine of a kind of hot-gas bypass of the present utility model, using hot-gas bypass technical controlling dehumidification system low pressure；Hot-gas bypass technology can use the hot gas bypass valve of specialty or the electrodynamic type hot gas bypass valve according to system low-voltage Stress control aperture；Unit is continuously run in low temperature environment, frost-free, also just reliable and stable without defrosting, system.
Description
Technical field
Temperature-adjustable dehumidifier technical field is the utility model is related to, specifically a kind of frostless low temperature dehumidification machine of hot-gas bypass.
Background technology
In the freeze drying machine cooling system of early stage, defrosting problem is not accounted for, it is in (≤18 DEG C) uses of low temperature environment
When occur evaporimeter frosting (its evaporating temperature be less than -2 DEG C) problem, longtime running, can a large amount of frostings even ice block up, air quantity
Reduce, leaving air temp declines, and effect on moisture extraction substantially reduces, or even system low-voltage pressure protection is shut down, can not be for a long time in low temperature ring
Continuously run in border.Later with defrosting function, low temperature can be referred to as in the long-term use of cooled dehumidifier unit of 5~18 DEG C of temperature environments
Dehumidifier, at present the defrosting mode of low temperature dehumidification machine typically have ventilation defrosting, magnetic valve bypass hot gas defrosting and four-way Vavle switching
Three kinds of heat pump to melt frost.
Ventilation defrosting be practically without really solving the problems, such as defrosting, simply when evaporimeter frosting to a certain extent when, freeze
System-down, only by fan operation, evaporator surface is heated using the air of indoor environment, make frost layer melt be
Water, this method defrosting time length, has a strong impact on effect on moisture extraction, makes humidity uncontrollable in many times；Magnetic valve bypasses hot gas
Compressor HTHP hot gas is bypassed to the expansion valve of refrigeration system to the pipeline between evaporator by defrosting by magnetic valve, i.e.,
Defrosting is carried out to evaporator using the hot gas of compressor discharge, its defrosting effect is preferable, and the defrosting time is short, but refrigeration system is rushed
Hit big, system matches complexity, a certain degree of influence unit durability；The systematic comparison of four-way Vavle switching heat pump to melt frost is ripe, in sky
Adjust and be commonly used in heat pump, but system can also stop dehumidifying during its four-way valve defrosting, can not continuous dehumidifying.That is this
Three kinds of common low temperature dehumidification machines are required to defrost, and can not dehumidify during defrosting, i.e., can not continuous dehumidifying, and can frosting, be both needed to
Want interval time defrosting.
Utility model content
Goal of the invention：In order to overcome the deficiencies in the prior art, it is frostless that the utility model provides a kind of hot-gas bypass
Low temperature dehumidification machine.
Technical scheme：In order to solve the above technical problems, the frostless low temperature dehumidification machine of a kind of hot-gas bypass of the present utility model, bag
Compressor and ventilation blower are included, compressor outlet connects condenser by pipeline, and the outlet of condenser passes through the evaporation of pipeline connection one
The entrance of device, the outlet of the evaporator connect the entrance of compressor by pipeline, and evaporator, condenser, ventilation blower are set gradually；
Also include hot gas bypass line, the hot gas bypass line one end connects the outlet of compressor, other end connection evaporator inlet, heat
Hot gas bypass valve is provided with gas bypass line, heating power expansion valve is provided with the pipeline being connected with evaporator inlet.
Wherein, hot gas bypass valve is mechanical or electrodynamic type hot gas bypass valve.
Wherein, it is provided with pressure sensor on evaporator outlet pipeline.
Beneficial effect：The frostless low temperature dehumidification machine of a kind of hot-gas bypass of the present utility model, has the advantages that：
(1) hot-gas bypass technical controlling dehumidification system low pressure is used；
(2) hot-gas bypass technology can use the hot gas bypass valve of specialty or according to the electronic of system low-voltage Stress control aperture
Formula hot gas bypass valve；
(3) unit is continuously run in low temperature environment, frost-free, also just reliable and stable without defrosting, system.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
In figure, 1- compressors, 2- condensers, 3- heating power expansion valves, 4- evaporators, 5- hot gas bypass valves, 6- ventilation blowers, 7-
Pressure sensor.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
The frostless low temperature dehumidification machine of a kind of hot-gas bypass as shown in Figure 1, including compressor 1 and ventilation blower 6, compressor 1 go out
Mouth connects condenser 2 by pipeline, and the outlet of condenser 2 connects the entrance of an evaporator 4 by pipeline, and the evaporator 4 goes out
Mouth connects the entrance of compressor 1 by pipeline, and evaporator 4, condenser 2, ventilation blower 6 are set gradually；Also include hot-gas bypass pipe
Road, the hot gas bypass line one end connect the outlet of compressor 1, and the other end connects the entrance of evaporator 4, set on hot gas bypass line
Hot gas bypass valve 5 is equipped with, heating power expansion valve 3 is provided with the pipeline being connected with the entrance of evaporator 4, hot gas bypass valve 5 is machine
Tool formula or electrodynamic type hot gas bypass valve, pressure sensor 7 is provided with the export pipeline of evaporator 4.
Specific work process of the present utility model is as follows.
As shown in figure 1, the high temperature and high pressure gas that compressor 1 is discharged enter condenser 2,2 cool down and condense within the condenser
As subcooled liquid (its liberated heat is taken away by air), then enter evaporator 4 after the reducing pressure by regulating flow of heating power expansion valve 3,
Absorb to flow through and become superheated steam after the heat of the air of evaporator 4 and be inhaled into compressor 1, so as to complete following for coolant system
Ring；Air flows down in the driving of ventilation blower 6, and pervaporation device 4 is cooled to dehumidify.
When hot gas bypass valve 5 is using special hot gas bypass valve, according to balance pipe pressure (the i.e. evaporator of hot gas bypass valve
4 outlet pressures) regulation hot-gas bypass valve opening, so that relative low points of the system low-voltage control in the frost-free of evaporator 4, so as to
Both effect on moisture extraction, and frostless continuous operation are ensured.
When hot gas bypass valve 5 is using electrodynamic type hot gas bypass valve, according to the detecting system evaporating pressure of pressure sensor 7,
By a controller, electrodynamic type hot-gas bypass valve opening is controlled, so that phase of the system low-voltage control in the frost-free of evaporator 4
To low spot, so as to both ensure effect on moisture extraction, and frostless continuous operation.
Described above is only preferred embodiment of the present utility model, it should be pointed out that：For the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (3)
- A kind of 1. frostless low temperature dehumidification machine of hot-gas bypass, it is characterised in that：Including compressor and ventilation blower, compressor outlet passes through Pipeline connects condenser, and the outlet of condenser connects the entrance of an evaporator by pipeline, and the outlet of the evaporator passes through pipeline The entrance of compressor is connected, evaporator, condenser, ventilation blower are set gradually；Also include hot gas bypass line, the hot-gas bypass pipe Road one end connects the outlet of compressor, and the other end connects evaporator inlet, hot gas bypass valve is provided with hot gas bypass line, Heating power expansion valve is provided with the pipeline being connected with evaporator inlet.
- A kind of 2. frostless low temperature dehumidification machine of hot-gas bypass according to claim 1, it is characterised in that：Wherein, hot-gas bypass Valve is mechanical or electrodynamic type hot gas bypass valve.
- A kind of 3. frostless low temperature dehumidification machine of hot-gas bypass according to claim 1, it is characterised in that：Wherein, evaporator goes out Pressure sensor is provided with mouth pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720841308.8U CN206973766U (en) | 2017-07-12 | 2017-07-12 | A kind of frostless low temperature dehumidification machine of hot-gas bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720841308.8U CN206973766U (en) | 2017-07-12 | 2017-07-12 | A kind of frostless low temperature dehumidification machine of hot-gas bypass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206973766U true CN206973766U (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720841308.8U Active CN206973766U (en) | 2017-07-12 | 2017-07-12 | A kind of frostless low temperature dehumidification machine of hot-gas bypass |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696743A (en) * | 2020-12-18 | 2021-04-23 | 广东申菱环境系统股份有限公司 | Dehumidifier and control method thereof |
| TWI727296B (en) * | 2019-04-03 | 2021-05-11 | 台灣松下電器股份有限公司 | Dehumidifier capable of avoiding frost on evaporator |
| TWI728274B (en) * | 2018-11-02 | 2021-05-21 | 陳俊宇 | Anti-frost structure of dehumidifier |
-
2017
- 2017-07-12 CN CN201720841308.8U patent/CN206973766U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI728274B (en) * | 2018-11-02 | 2021-05-21 | 陳俊宇 | Anti-frost structure of dehumidifier |
| TWI727296B (en) * | 2019-04-03 | 2021-05-11 | 台灣松下電器股份有限公司 | Dehumidifier capable of avoiding frost on evaporator |
| CN112696743A (en) * | 2020-12-18 | 2021-04-23 | 广东申菱环境系统股份有限公司 | Dehumidifier and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191202 Address after: 211151 No.2, Wangshan Road, Hengxi street, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing South Cooling Air Conditioning Equipment Co., Ltd. Address before: Jiangning District of Nanjing City, Jiangsu province 211151 Hengxi Street Community Wu Tao Wang Road No. 2-2 Patentee before: Nanjing HanWei NanLeng Refrigeration Group Co., Ltd. |
|
| TR01 | Transfer of patent right |