CN203518125U - Low-pressure protection device for air cooled heat pump air conditioning unit - Google Patents
Low-pressure protection device for air cooled heat pump air conditioning unit Download PDFInfo
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- CN203518125U CN203518125U CN201320549886.6U CN201320549886U CN203518125U CN 203518125 U CN203518125 U CN 203518125U CN 201320549886 U CN201320549886 U CN 201320549886U CN 203518125 U CN203518125 U CN 203518125U
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Abstract
The utility model relates to a low-pressure protection device for an air cooled heat pump air conditioning unit, and belongs to the field of air conditioning equipment. The air cooled heat pump air conditioning unit shares one pressure controller in the refrigeration mode and the heating mode, a heating low-pressure protection value serves as a standard, and when the air cooled heat pump air conditioning unit conducts refrigeration, if the conditions that water flow is insufficient, and the low-pressure protection value is set to be over-low happen, a series of accidents such as freezing due to over-low temperature of water in an evaporator and frost cracks of the evaporator can be caused. According to the low-pressure protection device, unit refrigeration and heating low-pressure protection are controlled in a split mode through a unit controller, two pressure controllers are installed on the air sucking side of the unit, the output ends of the pressure controllers are connected with a normally-open contact and a normally-closed contact of an intermediate relay respectively in series, the intermediate relay is connected with a four-way reversing valve in parallel, and the pressure controllers are externally connected with the unit controller. The intermediate relay and the pressure controllers are connected and disconnected to covert the over-low pressure condition caused on the air sucking side of the unit into passive signals, the passive signals are transmitted to the unit controller, and over-low-pressure protection on the unit is accordingly achieved.
Description
Technical field
The utility model relates to a kind of air-cooled heat-pump air-conditioner group low-voltage protection device in air-conditioning equipment field.
Background technology
At present, air-cooled heat-pump air-conditioner group shares a pressure controller when freezing, heating, and is generally set as heating low-voltage variation value.During unit real work, will low 0.15Mpa when unit when refrigeration suction side pressure ratio heats, thus cause unit refrigeration, heat shared pressure controller and cannot reach effective pressure protect to unit.When unit freezes, if there is the not enough situation of current, and that low-voltage variation value arranges is too low, can cause in evaporimeter that water temperature is too low freezes, the generation of a series of accidents such as evaporimeter bursting by freezing, refrigrant leakage, the water inlet of unit refrigerant system.
Summary of the invention
In order to overcome current air-cooled heat-pump air-conditioner group, cannot meet the drawback that suction side pressure is effectively protected requirement; the utility model provides a kind of air-cooled heat-pump air-conditioner group low-voltage protection device; by unit refrigeration, heat low-voltage variation and separate control by generator set controller; while effectively avoiding unit refrigeration, because current deficiency causes suction side hypotony, in evaporimeter, the too low series icing and that unit is caused of water temperature is damaged.
The utility model solves the technical scheme that its technical problem adopts: a kind of air-cooled heat-pump air-conditioner group low-voltage protection device is provided; this device is mainly, in unit suction side, two pressure controllers are installed; its output is connected with often the opening of the auxiliary reclay of and four-way change-over valve parallel connection, normally-closed contact respectively, and external generator set controller.By connection, the disconnection of auxiliary reclay and pressure controller, the hypotony situation that unit suction side is occurred is converted into passive signal and sends generator set controller to, thereby realize, Unit Commitment is controlled, and reaches the object of the low-voltage variation of suction side.
During unit operation; according to unit programme-control four-way change-over valve power supply output point 1, there is non-transformer output; thereby control energising and the power-off of auxiliary reclay coil KA; auxiliary reclay normally opened contact KA1, auxiliary reclay normally-closed contact KA2 coordinate with heat pressure controller LP1, the refrigerant pressure controller LP2 of series connection with it respectively; when pressure of inspiration(Pi) reaches setting protection value; to a hypotensive passive signal of unit suction side of generator set controller KC output, by generator set controller, KC stops unit operation.
The beneficial effects of the utility model are: unit suction side pressure protect is separately controlled, avoided because of refrigeration, to heat the different suction side pressure protects that cause of pressure too low.
Accompanying drawing explanation
Fig. 1 is generator set controller KC wiring schematic diagram; Fig. 2 is auxiliary reclay coil KA and four-way change-over valve YV wiring schematic diagram in parallel; Fig. 3 is auxiliary reclay normally opened contact KA1, auxiliary reclay normally-closed contact KA2 and the wiring schematic diagram that heats pressure controller LP1, refrigerant pressure controller LP2.
In figure: KC-generator set controller; YV-four-way change-over valve; KA-auxiliary reclay coil; KA1-auxiliary reclay normally opened contact, KA2-auxiliary reclay normally-closed contact, LP1-heats pressure controller; LP2-refrigerant pressure controller; 1-four-way change-over valve power supply output point, 2,3-low-voltage protection device hypotony signal output point, L, N-power supply.
The specific embodiment
As shown in Figure 1: power supply L, four-way change-over valve power supply output point 1, low-voltage protection device hypotony signal output point 2 and low-voltage protection device hypotony signal output point 3 are connected with generator set controller (KC).As shown in Figure 2: auxiliary reclay coil (KA) one end is connected with four-way change-over valve power supply output point 1, and the other end is connected to zero-power line N, make auxiliary reclay coil (KA) in parallel with four-way change-over valve (YV).As shown in Figure 3: one end of auxiliary reclay normally opened contact (KA1) is connected with low-voltage protection device hypotony signal output point 2; the other end with heat pressure controller (LP1) one end and be connected, heat pressure controller (LP1) other end and be connected with low-voltage protection device hypotony signal output point 3.One end of auxiliary reclay normally-closed contact (KA2) is connected with low-voltage protection device hypotony signal output point 2; the other end is connected with refrigerant pressure controller (LP2) one end, and refrigerant pressure controller (LP2) other end is connected with low-voltage protection device hypotony signal output point 3.
Claims (1)
1. an air-cooled heat-pump air-conditioner group low-voltage protection device, it is characterized in that: in unit suction side, two pressure controllers are installed, its output respectively with often the opening of one and four-way change-over valve auxiliary reclay in parallel, normally-closed contact series connection, and external generator set controller, wherein refrigerant pressure controller is connected with auxiliary reclay normally-closed contact, heating pressure controller connects with auxiliary reclay normally opened contact, by the connection of auxiliary reclay and pressure controller, disconnect, the hypotony situation that unit suction side is occurred is converted into passive signal and sends the controller of unit to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549886.6U CN203518125U (en) | 2013-09-05 | 2013-09-05 | Low-pressure protection device for air cooled heat pump air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549886.6U CN203518125U (en) | 2013-09-05 | 2013-09-05 | Low-pressure protection device for air cooled heat pump air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203518125U true CN203518125U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320549886.6U Expired - Fee Related CN203518125U (en) | 2013-09-05 | 2013-09-05 | Low-pressure protection device for air cooled heat pump air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203518125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294784A (en) * | 2021-12-28 | 2022-04-08 | 中山市爱美泰电器有限公司 | Defrosting control method for heat pump unit and heat pump unit |
-
2013
- 2013-09-05 CN CN201320549886.6U patent/CN203518125U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294784A (en) * | 2021-12-28 | 2022-04-08 | 中山市爱美泰电器有限公司 | Defrosting control method for heat pump unit and heat pump unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20150905 |
|
| EXPY | Termination of patent right or utility model |