CN207035563U - Variable air rate direct-expansion type unit - Google Patents
Variable air rate direct-expansion type unit Download PDFInfo
- Publication number
- CN207035563U CN207035563U CN201720925145.1U CN201720925145U CN207035563U CN 207035563 U CN207035563 U CN 207035563U CN 201720925145 U CN201720925145 U CN 201720925145U CN 207035563 U CN207035563 U CN 207035563U
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- China
- Prior art keywords
- air
- processing machine
- surface cooler
- expansion type
- type unit
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of variable air rate direct-expansion type unit, belong to field of air conditioning.Described variable air rate direct-expansion type unit includes compression condensation machine and air processing machine, the air processing machine includes air cleaner, surface cooler, breeze fan group, described air processing machine one end is provided with primary retirn air mouth, the other end is provided with air outlet, the air processing machine is provided with secondary returning air port, and the secondary returning air port is on the air processing machine between surface cooler and breeze fan group.The utility model is used for the regulation and filtering of room air, can effectively prevent overheat of compressor, surface cooler from freezing, the problem of wind pushing temperature temperature difference is big.
Description
Technical field
The utility model belongs to a kind of air-conditioning equipment, specifically, more particularly to a kind of variable air rate direct-expansion type unit.
Background technology
Direct-expansion type unit is all an only return air inlet mostly at present, an air outlet, can be gone out in actual use
The now following situation for influenceing normal use.If the 1, return air temperature is too high for a long time can cause the higher influence compressors of coil temperature T,
Temperature alarm phenomenon occurs in compressor of air conditioner；2nd, surface cooler freezes, and causes ice to block up phenomenon；3rd, the temperature-difference of air-supply
Greatly, easily there is sometimes hot and sometimes cold phenomenon.Overheat of compressor, surface cooler knot can effectively be prevented by needing one kind badly in the prior art
Direct-expansion type unit caused by ice, the big problem of the wind pushing temperature temperature difference.
Utility model content
The utility model purpose is to provide a kind of variable air rate direct-expansion type unit, to overcome direct-expansion type unit pressure in the prior art
The defects of contracting machine overheats, surface cooler freezes, the wind pushing temperature temperature difference is big.
The utility model is realized using following technical scheme：
Described variable air rate direct-expansion type unit, including compression condensation machine and air processing machine, the air processing machine include
Air cleaner, surface cooler, breeze fan group, described air processing machine one end are provided with primary retirn air mouth, and the other end is provided with air-supply
Mouthful, the air processing machine is provided with secondary returning air port, and the secondary returning air port is located between surface cooler and breeze fan group
On air processing machine.
Electric control valve is installed on the secondary returning air port.
The surface cooler is provided with temperature sensor, and the temperature sensor is connected with the controller on electric control valve.
Compared with prior art, the beneficial effects of the utility model are：The utility model is in air processing machine plus secondary
Return air inlet, and electric control valve is installed in secondary returning air port, can according to the openings of sizes of surface cooler temperature adjustment electric control valve
Effectively prevent overheat of compressor, surface cooler from freezing, the problem of wind pushing temperature temperature difference is big.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the pid algorithm formula of electric control valve of the present utility model.
In figure：1st, compression condensation machine；2nd, primary retirn air mouth；3rd, air processing machine；4th, air cleaner；5th, surface cooler；6、
Secondary returning air port；7th, breeze fan group；8th, air outlet.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, described variable air rate direct-expansion type unit, including compression condensation machine 1 and air processing machine 3, the sky
Gas disposal machine 3 includes air cleaner 4, surface cooler 5, breeze fan group 7, and indoor one end of air processing machine 3 is provided with and once returned
Air port 2, the other end are provided with air outlet 8, and the air processing machine 3 is provided with secondary returning air port 6, and the secondary returning air port 6 is located at
On air processing machine 3 between surface cooler 5 and breeze fan group 7, a part of return air can be cold without air cleaner 4, table
Device 5 is directly entered breeze fan group 7；Electric control valve is installed, the surface cooler 5 is provided with temperature on the secondary returning air port 6
Sensor is spent, the temperature sensor is connected with the controller on electric control valve, and temperature sensor passes to temperature signal
Controller, the size that controller control electric control valve is open according to the temperature adjustment secondary returning air port 6 of surface cooler 5.
The coil temperature T of the surface cooler 5 and electric control valve M of secondary returning air port 6 control method：Bipolarity pid algorithm, such as scheme
2 show pid algorithm formula.
SP is desired temperature for the coil temperature that we need, and PV is that value of feedback measures surface cooler 5 coil temperature T, Y
(S) for control output valve be electric control valve M aperture.
PID controller management export numerical value, to be zero by deviation (e), system is set to reach stable state.Deviation is given
It is worth the difference of (SP) and process variable (PV).
Operation principle：
The utility model direct-expansion type unit working condition is divided to two kinds of cooling in summer and winter heating.
During cooling in summer, if return air temperature is too high for a long time to cause the higher influence compression condensations of the coil temperature T of surface cooler 5
Machine 1, when the coil temperature T of surface cooler 5 is higher than setting value, at this moment increase the aperture of the electric control valve of secondary returning air port 6, reduce warp
The air quantity of the coil pipe of surface cooler 5 is crossed, reduces T and reaches the design temperature that we want, when the coil temperature of surface cooler 5 is relatively low, subtract
Small motorized adjustment valve opening, increase avoid the icing of the coil pipe of surface cooler 5 and compression condensation machine 1 from going out by the air quantity of the coil pipe of surface cooler 5
Existing liquid hit phenomenon.
During winter heating：During start, first detect after the coil temperature T of surface cooler 5 reaches setting value and just adjust reduction electric adjustable
Valve is saved, can so wind pushing temperature is lifted rapidly, avoid the occurrence of and send cold wind phenomenon.When defrost starts, motorized adjustment is opened completely
Valve, because primary retirn air has the resistance of air cleaner 4, surface cooler 5, most of wind is passed through by secondary returning air port 6, on a small quantity
Wind also without shutdown during such defrost, and reduces the defrost time by air cleaner 4, surface cooler 5.
Claims (3)
1. a kind of variable air rate direct-expansion type unit, including compression condensation machine (1) and air processing machine (3), the air processing machine (3)
Including air cleaner (4), surface cooler (5), breeze fan group (7), described air processing machine (3) one end is provided with primary retirn air mouth
(2), the other end is provided with air outlet (8), it is characterised in that：The air processing machine (3) is provided with secondary returning air port (6), described
Secondary returning air port (6) is on the air processing machine (3) between surface cooler (5) and breeze fan group (7).
2. variable air rate direct-expansion type unit according to claim 1, it is characterised in that：Installed on the secondary returning air port (6)
There is electric control valve.
3. variable air rate direct-expansion type unit according to claim 2, it is characterised in that：The surface cooler (5) is provided with temperature
Sensor, the temperature sensor are connected with the controller on electric control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720925145.1U CN207035563U (en) | 2017-07-27 | 2017-07-27 | Variable air rate direct-expansion type unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720925145.1U CN207035563U (en) | 2017-07-27 | 2017-07-27 | Variable air rate direct-expansion type unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207035563U true CN207035563U (en) | 2018-02-23 |
Family
ID=61462821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720925145.1U Expired - Fee Related CN207035563U (en) | 2017-07-27 | 2017-07-27 | Variable air rate direct-expansion type unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207035563U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654598A (en) * | 2019-02-21 | 2019-04-19 | 南京天加环境科技有限公司 | A kind of adjustable air-conditioning system of heating condensing pressure and its control method |
| CN110715377A (en) * | 2019-10-28 | 2020-01-21 | 上海蓝色帛缔智能工程有限公司 | Machine room and air conditioner integrated machine |
-
2017
- 2017-07-27 CN CN201720925145.1U patent/CN207035563U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654598A (en) * | 2019-02-21 | 2019-04-19 | 南京天加环境科技有限公司 | A kind of adjustable air-conditioning system of heating condensing pressure and its control method |
| CN110715377A (en) * | 2019-10-28 | 2020-01-21 | 上海蓝色帛缔智能工程有限公司 | Machine room and air conditioner integrated machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20190727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |