CN203731735U - Screw-type air-cooled heat pump air conditioning unit - Google Patents
Screw-type air-cooled heat pump air conditioning unit Download PDFInfo
- Publication number
- CN203731735U CN203731735U CN201420107992.3U CN201420107992U CN203731735U CN 203731735 U CN203731735 U CN 203731735U CN 201420107992 U CN201420107992 U CN 201420107992U CN 203731735 U CN203731735 U CN 203731735U
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- China
- Prior art keywords
- heat pump
- compressor
- cooled heat
- air conditioner
- screw
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- Expired - Lifetime
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- 238000004378 air conditioning Methods 0.000 title abstract description 4
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 24
- 238000010257 thawing Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 230000003434 inspiratory effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Abstract
The utility model relates to the technical field of air conditionings, in particular to a screw-type air-cooled heat pump air conditioning unit. The unit comprises a screw-type compressor, a four-way reversing valve, a heat exchanger, an electronic expansion valve, a liquid accumulator and an evaporator communicated through refrigerant pipelines. The unit has the advantages that a gas-liquid separator is omitted, the structure is simplified, cost is lowered, air suction resistance is reduced, and energy efficiency ratio of the unit is increased; in addition, a low pressure sensor and a temperature sensor are arranged between the air suction end of the screw-type compressor, and a high pressure sensor is arranged between the exhaust end of the screw-type compressor and the four-way reversing valve, so that opening of the electronic expansion valve can be regulated, and further flow and flow rate of refrigerant are controlled to achieve low pressure protection and prevent liquid impact; besides, the four-way reversing valve can be directly reversed, so that the heat pump unit needs not to stop during defrosting, but reversing and defrosting are performed directly, the four-way reversing valve is directly reserved to enter a heating mode after defrosting, and service life of the compressor is prolonged while heating effect of the compressor is improved.
Description
Technical field
The utility model relates to air-conditioning technical field, is specifically related to a kind of Worm type air-cooled heat pump air conditioner unit.
Background technology
The circulatory system that air-cooled heat-pump air-conditioner group is mainly connected to form by refrigerant pipe by devices such as compressor, cross valve, condenser, reservoir, throttling arrangement, evaporimeter, gas-liquid separators, refrigerant (being cold-producing medium) circulates to realize refrigeration, heats and defrost function under the effect of compressor in this system.Divide by the type of compressor, air-cooled heat-pump air-conditioner group can be divided into piston type, vortex and screw, wherein, Worm type air-cooled heat pump air conditioner unit due to its have compact conformation, wearing and tearing less, the feature such as efficiency is high, defrosting effect is good, become the main flow that heat pump air conditioner unit is applied.
The Worm type air-cooled heat pump air conditioner unit of tradition is generally all connected with gas-liquid separator 101 as shown in Figure 1 at the air entry end of compressor, gas-liquid separator 101 can effectively prevent that compressor inlet inspiration liquid refrigerants from producing liquid hammer and damaging compressor, but, gas-liquid separator 101 ground settings have also increased the suction side local resistance of compressor, the Energy Efficiency Ratio of reduction system, and cause the oil return difficulty of compressor, simultaneously, the complexity that has also increased system, has increased cost; In addition, when traditional Air-Cooled Heat Pump Unit defrosts, often need after system-down; then commutate by cross valve, restart refrigeration, after waiting and eliminating; restart and heat; the process of twice startup-shutdown of intermediate demand, and general 6 minutes minimum shutdown intervals time of helical-lobe compressor, therefore tradition oppositely defrosts by refrigeration; can cause heat on the one hand loses; have a strong impact on heating effect, frequent start-stop compressor on the other hand, the service life of greatly reducing compressor.
Summary of the invention
The purpose of this utility model is for deficiency of the prior art, and provide a kind of Worm type air-cooled heat pump air conditioner unit, this source pump can reduce the inspiratory resistance of compressor, improve Energy Efficiency Ratio and the heating effect of unit, and make the oil return of compressor more smooth and easy, extend the service life of compressor, simplified the structure of unit simultaneously, reduced cost.
The purpose of this utility model is achieved through the following technical solutions:
A kind of Worm type air-cooled heat pump air conditioner unit is provided, comprise the screw compressor being connected successively by refrigerant pipe, four-way change-over valve, heat exchanger, electric expansion valve, reservoir and evaporimeter, described evaporimeter is also communicated in described four-way change-over valve by refrigerant pipe, the suction end of described screw compressor is arranged at the top of the low pressure refrigerant pipeline of described four-way change-over valve, between the suction end of described screw compressor and described four-way change-over valve, be provided with low pressure sensor and temperature sensor, between the exhaust end of described screw compressor and described four-way change-over valve, be provided with high pressure sensor.
Wherein, this heat pump air conditioner unit also comprises master controller.
Wherein, described high pressure sensor, described low pressure sensor and described temperature sensor are all electrically connected with described master controller.
Wherein, described screw compressor is provided with compressor controller, and described compressor controller is electrically connected with described master controller.
Wherein, described heat exchanger is finned heat exchanger.
Wherein, the sidepiece of described finned heat exchanger is provided with blower fan group.
Wherein, described evaporimeter is shell and tube evaporator.
The beneficial effects of the utility model:
Worm type air-cooled heat pump air conditioner unit of the present utility model, comprises the screw compressor, four-way change-over valve, heat exchanger, electric expansion valve, reservoir and the evaporimeter that are connected successively by refrigerant pipe.This source pump, owing to having cancelled the setting of gas-liquid separator, has been simplified set structure, has reduced cost, and reduce the inspiratory resistance of compressor, make the oil return of compressor more smooth and easy, improve the Energy Efficiency Ratio of unit, eliminated the hidden danger of the easy wrong of gas-liquid separator simultaneously; In addition, this source pump is by the measured temperature of temperature sensor, open degree to electric expansion valve regulates, and then flow and the flow velocity of control refrigerant, to play low-voltage variation and to prevent that the situation of liquid hammer from occurring, simultaneously, the suction end of screw compressor is arranged at the top of the low pressure refrigerant pipeline of four-way change-over valve, thereby make liquid coolant in the situation that flow velocity reduces, be difficult to suck in compressor, and then further prevent liquid hammer; This source pump is by high pressure sensor and the measured pressure differential of low pressure sensor; directly four-way change-over valve is commutated; make this source pump not need to shut down in the time of defrosting; but directly carry out reverse cycle defrost; the rear four-way change-over valve commutation that defrosted directly enters and heats; reduce start and stop number of times; improve service life and the heating effect of compressor; and avoid four-way change-over valve in the time of commutation; pressure differential is inadequate; in the middle of four-way change-over valve rests on, become high-low pressure and collaborate, the situation that unit cannot normally move is occurred.
Brief description of the drawings
Fig. 1 is the structural representation of traditional Worm type air-cooled heat pump air conditioner unit;
The structural representation of Fig. 2 a kind of Worm type air-cooled heat pump air conditioner unit of the present utility model.
In Fig. 1 and Fig. 2, include:
Screw compressor 1, compressor controller 11;
Four-way change-over valve 2, heat exchanger 3, electric expansion valve 4, reservoir 5, evaporimeter 6, refrigerant pipe 7, low pressure sensor 8, high pressure sensor 9, temperature sensor 10, gas-liquid separator 101.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
The specific embodiment of a kind of Worm type air-cooled heat pump air conditioner unit of the present utility model as shown in Figure 2, comprise the screw compressor 1 being connected successively by refrigerant pipe 7, four-way change-over valve 2, heat exchanger 3, electric expansion valve 4, reservoir 5 and evaporimeter 6, evaporimeter 6 is communicated in four-way change-over valve 2 by refrigerant pipe 7 again and forms a closed-loop system, make refrigerant in this closed-loop system, flow to realize refrigeration by screw compressor 1, heat and defrost function, in addition, air-cooled heat pump assembly of the present utility model has saved gas-liquid separator 101 than Air-Cooled Heat Pump Unit of the prior art, the suction end of screw compressor 1 is directly connected with four-way change-over valve 2, simplify the structure, provide cost savings, and reduce the inspiratory resistance of compressor, make the oil return of compressor more smooth and easy, improve the Energy Efficiency Ratio of unit, eliminated the hidden danger of gas-liquid separator 101 easy wrongs simultaneously.
Between the suction end of screw compressor 1 and four-way change-over valve 2, be provided with low pressure sensor 8 and temperature sensor 10, between the exhaust end of screw compressor 1 and four-way change-over valve 2, be provided with high pressure sensor 9.In the utility model, this heat pump air conditioner unit also comprises master controller, high pressure sensor 9, low pressure sensor 8 and temperature sensor 10 are all electrically connected with master controller, high pressure sensor 9 and low pressure sensor 8 by the pressure transmission detecting to master controller, master controller is directly realized the commutation of four-way change-over valve 2 according to the pressure differential obtaining, make this source pump not need to shut down in the time of defrosting, but directly carry out reverse cycle defrost, the rear four-way change-over valve 2 that defrosted again commutates and directly enters heating mode, reduce start/stop of compressor machine number of times, extend the service life of compressor and the loss of minimizing heat, and avoid four-way change-over valve 2 in the time of commutation, pressure differential is inadequate, in the middle of four-way change-over valve 2 rests on, becoming high-low pressure collaborates, the situation that unit cannot normally move is occurred.Measured temperature is transferred to master controller by temperature sensor 10; master controller is by calculating now suction superheat; and the open degree of electric expansion valve 4 is regulated; and then flow and the flow velocity of control refrigerant; to play low-voltage variation and to prevent liquid hammer compressor; meanwhile, electric expansion valve 4 has advantages of that response is fast, precision is high.
During this use is novel, screw compressor 1 is provided with compressor controller 11, compressor controller 11 is electrically connected with master controller, in the time of start or defrosting, compressor controller 11 carries out load down operation, generally falls lower poweredly 20%～30%, and then reduces the flow velocity of liquid coolant in this unit, prevent compressor from sucking liquid coolant and produce liquid hit phenomenon, ensureing unit safety operation; Further, the suction end of screw compressor 1 is arranged at the top of the low pressure refrigerant pipeline 7 of four-way change-over valve 2, thereby makes liquid coolant in the situation that flow velocity reduces, and is difficult to suck in compressor and produces liquid hit phenomenon.
In the utility model, evaporimeter 6 is shell and tube evaporator, and it is good that it has heat exchange property, and the life-span is long, easy to maintenance.Heat exchanger 3 is finned heat exchanger, finned heat exchanger has that heat transfer efficiency is high, compact conformation, light and handy and firmly, the features such as simple and easy are installed, be the main product in heat exchanger 3.
Concrete, the sidepiece of finned heat exchanger is provided with blower fan group, accelerates heat radiation, improves the Energy Efficiency Ratio of finned heat exchanger.
In the utility model; in the time that this heat pump air conditioner unit normally moves; measured temperature is transferred to master controller by temperature sensor 10; master controller regulates according to this temperature and to the open degree of electric expansion valve 4; and then flow and the flow velocity of control refrigerant; to play low-voltage variation and to prevent liquid hammer compressor, and make unit reach the highest Energy Efficiency Ratio.
In the time that this heat pump air conditioner unit need to defrost; high pressure sensor 9 and low pressure sensor 8 by the pressure transmission detecting to master controller; master controller is directly realized the commutation of four-way change-over valve 2 according to the pressure differential obtaining; make this source pump not need to shut down in the time of defrosting; but directly carry out reverse cycle defrost; after defrosting completes; four-way change-over valve 2 again commutates and directly enters heating mode under the control of master controller; realize not needing to shut down and can carry out refrigeration mode and heating mode and switch; reduce the loss of heat, extend the service life of compressor.
Above embodiment is only in order to the technical solution of the utility model to be described, but not restriction to the utility model protection domain can be modified or be equal to replacement the technical solution of the utility model, and do not departed from essence and the scope of technical solutions of the utility model.
Claims (7)
1. a Worm type air-cooled heat pump air conditioner unit, it is characterized in that: comprise the screw compressor being connected successively by refrigerant pipe, four-way change-over valve, heat exchanger, electric expansion valve, reservoir and evaporimeter, described evaporimeter is also communicated in described four-way change-over valve by refrigerant pipe, the suction end of described screw compressor is arranged at the top of the low pressure refrigerant pipeline of described four-way change-over valve, between the suction end of described screw compressor and described four-way change-over valve, be provided with low pressure sensor and temperature sensor, between the exhaust end of described screw compressor and described four-way change-over valve, be provided with high pressure sensor.
2. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 1, it is characterized in that: this heat pump air conditioner unit also comprises master controller.
3. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 2, it is characterized in that: described high pressure sensor, described low pressure sensor and described temperature sensor are all electrically connected with described master controller.
4. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 2, it is characterized in that: described screw compressor is provided with compressor controller, described compressor controller is electrically connected with described master controller.
5. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 1, it is characterized in that: described heat exchanger is finned heat exchanger.
6. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 5, it is characterized in that: a side of described finned heat exchanger is provided with blower fan group.
7. according to the Worm type air-cooled heat pump air conditioner unit of the one of claim 1, it is characterized in that: described evaporimeter is shell and tube evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420107992.3U CN203731735U (en) | 2014-03-11 | 2014-03-11 | Screw-type air-cooled heat pump air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420107992.3U CN203731735U (en) | 2014-03-11 | 2014-03-11 | Screw-type air-cooled heat pump air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203731735U true CN203731735U (en) | 2014-07-23 |
Family
ID=51201803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420107992.3U Expired - Lifetime CN203731735U (en) | 2014-03-11 | 2014-03-11 | Screw-type air-cooled heat pump air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203731735U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132493A (en) * | 2014-08-14 | 2014-11-05 | 山东力诺瑞特新能源有限公司 | Heat pump fluorine path system pressure display and control integrated device |
| CN112178887A (en) * | 2020-09-27 | 2021-01-05 | 广东芬尼克兹节能设备有限公司 | Four-way valve switching control method and device |
| CN114543386A (en) * | 2022-02-24 | 2022-05-27 | 南京天加环境科技有限公司 | Efficient flooded air-cooled heat pump system |
-
2014
- 2014-03-11 CN CN201420107992.3U patent/CN203731735U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132493A (en) * | 2014-08-14 | 2014-11-05 | 山东力诺瑞特新能源有限公司 | Heat pump fluorine path system pressure display and control integrated device |
| CN112178887A (en) * | 2020-09-27 | 2021-01-05 | 广东芬尼克兹节能设备有限公司 | Four-way valve switching control method and device |
| CN114543386A (en) * | 2022-02-24 | 2022-05-27 | 南京天加环境科技有限公司 | Efficient flooded air-cooled heat pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |