CN212409023U - Multifunctional double-coil air handling unit - Google Patents
Multifunctional double-coil air handling unit Download PDFInfo
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- CN212409023U CN212409023U CN202020647248.8U CN202020647248U CN212409023U CN 212409023 U CN212409023 U CN 212409023U CN 202020647248 U CN202020647248 U CN 202020647248U CN 212409023 U CN212409023 U CN 212409023U
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Abstract
The utility model discloses a multi-functional double coil pipe air treatment unit, including unit housing, high temperature cold water coil pipe, low temperature cold water coil pipe, first inlet tube, first outlet pipe, second inlet tube, second outlet pipe, communicating pipe, first governing valve, second governing valve, electronic communicating valve and controller, high temperature cold water coil pipe, low temperature cold water coil pipe set up in unit housing, first inlet tube and first outlet pipe communicate with water inlet and delivery port of high temperature cold water coil pipe respectively, second inlet tube, second outlet pipe communicate with water inlet and delivery port of low temperature cold water coil pipe respectively; the communicating pipe is communicated with the first water inlet pipe and the second water inlet pipe, and the electric communicating valve is arranged on the communicating pipe. The utility model provides a multi-functional two coil pipe air treatment units, it is simple reliable to have control, can make full use of priority high temperature cold source: the operation mode of the equipment can be controlled according to the temperature of the water inlet pipe, and the energy is fully utilized.
Description
Technical Field
The utility model belongs to the technical field of the air treatment device technique and specifically relates to a multi-functional two coil pipe air treatment unit is related to.
Background
The existing double-coil air handling unit is provided with double coils for backing up a system, when one coil or system pipeline fails, the system is switched to another cooling coil or system pipeline, each coil can only be connected with different pipeline systems, only single coil can operate or two coils can operate in parallel, parallel-to-serial or serial-to-parallel operation cannot be realized, the adjustment modes are that the supply air or return air temperature of the air handling unit is adopted to control the opening or closing of an electric adjusting valve on a return water pipe, but the mode cannot meet the air handling requirement of double-coil double-cold-source step cooling for air handling at the same time. The invention provides a double-coil air handling unit for cascade cooling and a control method thereof, wherein the double-coil air handling unit cannot be started with priority to fully utilize a high-temperature cold source, and the double-cold source system can be ensured to fully utilize the cold source with higher temperature so as to save the energy consumption of a refrigerating system. Therefore, a multifunctional double-coil air handling unit which is simple and reliable to control and fully and preferentially utilizes a high-temperature cold source and a control method need to be designed.
Chinese patent application publication No. CN208011941U, published as 2017, 03, 15, entitled "power circuit breaker spring dismounting device", discloses a novel bypass energy-saving cylindrical double-coil direct-feeding air handling unit, which comprises a cylindrical box body, an air inlet, a filter, a bypass valve, a high-temperature surface cooler, a low-temperature surface cooler, a fan, and an air supply outlet; the filter is arranged at the downstream position of the air inlet and is provided with two air inlets, namely a first air inlet and a second air inlet; the five groups of bypass valves are arranged, wherein a first bypass valve is arranged at the front end part of the high-temperature surface cooler and is arranged on an inner ring of the circular-tube-shaped high-temperature surface cooler, a second bypass valve is arranged at the rear end part of the low-temperature surface cooler and is arranged on the inner ring of the circular-tube-shaped low-temperature surface cooler, a third bypass valve is arranged at the periphery of the joint of the high-temperature surface cooler and the low-temperature surface cooler and is connected with the wall of the cylindrical box body, a fourth bypass valve is arranged at the periphery of the rear end part of the low-temperature surface cooler and is connected with the wall of. The above problems still exist with this device.
Disclosure of Invention
The utility model discloses an overcome among the prior art two coil pipe air handling unit can only single coil pipe operation or two coil pipe parallel operation, can not realize parallelly connected not enough of establishing ties or series connection commentaries on classics parallel transportation, provide a multi-functional two coil pipe air handling unit, it is simple reliable to have control, can the high temperature cold source of make full use of priority: the operation mode of the equipment can be controlled according to the temperature of the water inlet pipe, and the energy is fully utilized.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multifunctional double-coil air handling unit comprises a unit shell, a high-temperature cold water coil, a low-temperature cold water coil, a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe, a communicating pipe, a first regulating valve, a second regulating valve, an electric communicating valve and a controller, wherein the high-temperature cold water coil and the low-temperature cold water coil are arranged in the unit shell, the first water inlet pipe and the first water outlet pipe are respectively communicated with a water inlet and a water outlet of the high-temperature cold water coil, and the second water inlet pipe and the second water outlet pipe are respectively communicated with the water inlet and the water outlet of the low-temperature cold water coil; one end of the communicating pipe is communicated with the first water inlet pipe, the other end of the communicating pipe is communicated with the second water inlet pipe between the first regulating valve and the low-temperature cold water coil pipe, and the electric communicating valve is arranged on the communicating pipe; the first regulating valve, the second regulating valve and the electric communicating valve are respectively and electrically connected with the controller.
In the technical scheme, return air enters the air handling unit from the return air inlet, passes through the high-temperature cold water coil pipe, passes through the low-temperature cold water coil pipe and is sent out of the air handling unit. The first regulating valve, the second regulating valve and the electric communicating valve are electric regulating valves. When the high-temperature cold water coil and the low-temperature cold water coil are required to be connected in series, the first regulating valve and the electric communicating valve are opened, the second regulating valve communicating pipe is closed, the first water inlet pipe and the second water outlet pipe can be communicated, and a double-coil series operation mode is realized; the first regulating valve and the second regulating valve are opened through the controller, the electric communication valve is closed, and the unit operates in a parallel cascade cooling mode; the first regulating valve is closed through the controller, the second regulating valve is opened, the electric valve on the communicating pipe is closed, and the unit operates in a low-temperature cold water coil pipe independent operation mode. The air treatment unit is simple and reliable to control, and fully and preferentially utilizes the high-temperature cold source for cooling, and simultaneously can fully utilize the low-temperature cold source through a series operation mode. The temperature of the high-temperature cold water coil is slightly higher than that of cold water in the low-temperature cold water coil instead of high-temperature water.
Preferably, the first water outlet pipe is provided with a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are respectively arranged on two sides of the first regulating valve.
When the air handling unit is started, the controller preferentially detects the pressure value between two sides of the electric switch valve on the water outlet pipe of the high-temperature cold water coil, and when the pressure difference between the first pressure sensor and the second pressure sensor is larger than a set value delta P1, the high-temperature cold water system is started for cooling.
Preferably, a first temperature sensor is arranged on the first water inlet pipe and electrically connected with the controller. The temperature of the first water inlet pipe can be measured through the temperature of the first temperature sensor, and then the cold water resources in the first water inlet pipe and the second water inlet pipe are fully utilized through the operation mode of the controller control equipment. When the air treatment unit is started, the controller preferentially processes a pressure value and a water supply temperature value between two sides of an electric switch valve on a water outlet pipe of the high-temperature cold water coil, when a pressure difference value is larger than a set value delta P1, the high-temperature cold water system is started for cooling, the controller sends a signal to open an electric regulating valve on the water outlet pipe of the high-temperature cold water coil to the maximum value, then the water supply temperature of the first water inlet pipe is detected, and when a temperature value T is smaller than or equal to a set value A, the water temperature meets the water supply requirement of a serial cold supply; when the controller detects that the water supply temperature A on the first water inlet pipe is more than T and less than or equal to B, the unit operates in a parallel cascade cooling mode; when the controller detects that the water supply temperature on the first water inlet pipe is greater than B, the water supply temperature is indicated to be reduced in a proper amount, and the unit operates in a low-temperature cold water coil pipe independent operation mode.
Preferably, a second temperature sensor is arranged on the second water inlet pipe and electrically connected with the controller. The second temperature sensor may measure a temperature of cold water in the second water inlet pipe. When the controller detects that the pressure difference value of two sides of the electric switch valve of the water outlet pipe of the high-temperature cold water coil is smaller than a set value delta P2, the high-temperature cold source system stops cooling, the controller closes the first regulating valve on the water outlet pipe of the high-temperature cold water coil, opens the second regulating valve on the water outlet pipe of the low-temperature cold water coil, detects the water inlet temperature of the low-temperature cold water coil, and when the water inlet temperature T is smaller than A, the unit enters a series mode to operate. And when the water inlet temperature A is less than or equal to T and less than or equal to A plus delta A, the unit enters a low-temperature cold water coil independent operation mode.
Preferably, the first water inlet pipe is provided with a check valve, and the check valve is arranged on the upstream of the communicating pipe. The upstream refers to the direction of water flow. The check valve can prevent the backflow of the cold water of the first water inlet pipe when the high-temperature cold water coil and the low-temperature cold water coil are connected in series.
Preferably, the air conditioner further comprises a fan and a return air inlet, wherein the fan and the return air inlet are respectively arranged at two opposite sides of the unit shell, and the fan is arranged at one side close to the low-temperature cold water coil. Air in the structure firstly enters the high-temperature cold water coil pipe with relatively high temperature and then enters the low-temperature cold water coil pipe, so that energy can be fully utilized.
Preferably, an air supply temperature sensor is arranged on the side, close to the air outlet, of the low-temperature cold water coil; the air supply temperature sensors are respectively and electrically connected with the controller.
The air supply temperature sensor can measure the air supply temperature value ts . When the temperature sensor of the air supply detectsThe temperature of the air supply deviates from the set temperature tsWhen +/-Delta S, the controller firstly detects which operation mode is:
1) if the low-temperature cold water coil pipe operates independently, the opening degree of a second regulating valve on a water outlet pipe of the low-temperature cold water coil pipe is increased or reduced, so that the air supply temperature is tsAnd +/-Delta S range.
2) If the operation mode is the parallel operation mode, whether the electric valve on the water outlet pipe of the high-temperature cold water coil pipe is opened to the maximum value is firstly confirmed, the high-temperature cold water coil pipe is ensured to be in the full-load operation state, and then the second regulating valve on the water outlet pipe of the high-temperature cold water coil pipe is turned down or turned up, so that the air supply temperature is tsAnd +/-Delta S range.
3) If the operation mode is the series operation mode, the controller gradually closes or increases the opening degree of the first regulating valve on the water outlet pipe of the high-temperature cold water coil pipe to ensure that the air supply temperature is tsAnd +/-Delta S range.
Preferably, an intermediate temperature sensor is arranged between the high-temperature cold water coil and the low-temperature cold water coil, and a return air temperature sensor is arranged on one side, close to the return air inlet, of the high-temperature cold water coil; the return air temperature sensor and the intermediate temperature sensor are respectively electrically connected with the controller. The cooling effect of the high-temperature cold water coil pipe can be known through the difference value of the middle temperature sensor and the return air temperature sensor, and then the flow of the first water inlet pipe is adjusted through the first adjusting valve.
The utility model has the advantages that: (1) the control is simple and reliable, and the high-temperature cold source can be fully and preferentially utilized: (2) the operation mode of the equipment can be controlled according to the temperature of the water inlet pipe, and energy is fully utilized; (3) can be according to return air temperature, satisfy the return air temperature demand through the aperture of controller control governing valve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a control schematic diagram of the present invention.
In the figure: the air conditioner comprises a unit shell 1, an air return inlet 1.1, a high-temperature cold water coil 2, a low-temperature cold water coil 3, a first water inlet pipe 4, a first water outlet pipe 5, a second water inlet pipe 6, a second water outlet pipe 7, a communicating pipe 8, a first regulating valve 9, a second regulating valve 10, an electric communicating valve 11, a controller 12, a first pressure sensor 13, a second pressure sensor 14, a first temperature sensor 15, a second temperature sensor 16, a check valve 17, a fan 18, an air return temperature sensor 19, an intermediate temperature sensor 20 and an air supply temperature sensor 22.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1 and 2, a multifunctional double-coil air handling unit comprises a unit shell, a high-temperature cold water coil, a low-temperature cold water coil, a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe, a communicating pipe, a first regulating valve, a second regulating valve, an electric communicating valve and a controller, wherein the high-temperature cold water coil and the low-temperature cold water coil are arranged in the unit shell side by side, the first water inlet pipe and the first water outlet pipe are respectively communicated with a water inlet and a water outlet of the high-temperature cold water coil, and the second water inlet pipe and the second water outlet pipe are respectively communicated with a water inlet and a water outlet of the low-temperature; one end of the communicating pipe is communicated with the first water inlet pipe, the other end of the communicating pipe is communicated with the second water inlet pipe between the first regulating valve and the low-temperature cold water coil pipe, and the electric communicating valve is arranged on the communicating pipe; the first regulating valve, the second regulating valve and the electric communicating valve are respectively and electrically connected with the controller.
And the first water outlet pipe is provided with a first pressure sensor and a second pressure sensor which are respectively arranged at two sides of the first regulating valve. Be equipped with first temperature sensor and check valve on the first inlet tube, the check valve setting is in the closed tube upper reaches. And a second temperature sensor is arranged on the second water inlet pipe and electrically connected with the controller, and the first temperature sensor and the second temperature sensor are respectively electrically connected with the controller.
An air supply temperature sensor is arranged on the low-temperature cold water coil pipe close to the air outlet side; an intermediate temperature sensor is arranged between the high-temperature cold water coil and the low-temperature cold water coil, and a return air temperature sensor is arranged on one side of the high-temperature cold water coil, which is close to the return air inlet; the air supply temperature sensor, the air return temperature sensor and the intermediate temperature sensor are respectively and electrically connected with the controller.
In the technical scheme, return air enters the air handling unit from the return air inlet, passes through the high-temperature cold water coil pipe, passes through the low-temperature cold water coil pipe and is sent out of the air handling unit. The first regulating valve, the second regulating valve and the electric communicating valve are electric regulating valves. When the high-temperature cold water coil and the low-temperature cold water coil are required to be connected in series, the first regulating valve and the electric communicating valve are opened, the second regulating valve communicating pipe is closed, the first water inlet pipe and the second water outlet pipe can be communicated, and a double-coil series operation mode is realized; the first regulating valve and the second regulating valve are opened through the controller, the electric communication valve is closed, and the unit operates in a parallel cascade cooling mode; the first regulating valve is closed through the controller, the second regulating valve is opened, the electric valve on the communicating pipe is closed, and the unit operates in a low-temperature cold water coil pipe independent operation mode. The air treatment unit is simple and reliable to control, and fully and preferentially utilizes the high-temperature cold source for cooling, and simultaneously can fully utilize the low-temperature cold source through a series operation mode. The temperature of the high-temperature cold water coil is slightly higher than that of cold water in the low-temperature cold water coil instead of high-temperature water.
Example 2:
the air treatment unit can have three modes, namely a double-coil series operation mode, a double-coil parallel operation mode and a low-temperature cold water coil single operation mode according to the cold water temperature in the first water inlet pipe.
Double coil series operation mode: when the air processing unit is started, the controller preferentially detects the pressure value and the water supply temperature value between two sides of the electric switch valve on the water outlet pipe of the high-temperature cold water coil, when the difference between the two pressure values is greater than a set value delta P1, which indicates that the high-temperature cold water system is started to supply cold, the controller sends a signal to open the first regulating valve on the water outlet pipe of the high-temperature cold water coil to the maximum value, then detects the water supply temperature of the water supply pipe of the high-temperature cold water coil, when the temperature value is less than or equal to a set value T < A, which indicates that the water temperature meets the water supply requirement of a serial cold supply mode, the first regulating valve and the electric communication valve are opened, the second regulating valve is closed, the communication pipe can communicate the first water inlet pipe with the second water outlet pipe, cold water flows in from the water inlet pipe of the low-temperature cold water coil, enters the water inlet pipe of the high, the unit operates in series mode.
Double-coil parallel operation mode: when the controller detects that the water supply temperature A on the water inlet pipe of the high-temperature cold water coil is more than T and less than or equal to B, the first regulating valve and the second regulating valve are opened through the controller, the electric communicating valve is closed, and the unit operates in a parallel cascade cooling mode.
The low-temperature cold water coil pipe is operated in an independent mode: when the controller detects that the water supply temperature B on the high-temperature cold water coil water inlet pipe is less than T, the first regulating valve is closed through the controller, the second regulating valve is opened, the electric valve on the communicating pipe is closed, and the unit operates in the low-temperature cold water coil independent operation mode.
Example 3:
temperature adjustment of air: when the air supply temperature sensor detects that the air supply temperature value deviates from the set air supply temperature value tsWhen +/-Delta S, the controller firstly detects which operation mode is:
1) if the low-temperature cold water coil pipe operates independently, the opening degree of the low-temperature cold water coil pipe on the water outlet pipe is increased or reduced, so that the air supply temperature is tsAnd +/-Delta S range.
2) If the operation mode is the parallel operation mode, firstly confirming whether the electric valve on the water outlet pipe of the high-temperature cold water coil pipe is opened to the maximum value, ensuring that the high-temperature cold water coil pipe is in the full-load operation state, and then turning down or turning up the electric valve on the water outlet pipe of the high-temperature cold water coil pipe to ensure that the air supply temperature is tsAnd +/-Delta S range. .
3) If the operation mode is the series operation mode, the controller gradually closes or increases the opening of the electric regulating valve on the water outlet pipe of the high-temperature cold water coil pipe to ensure that the air supply temperature is tsAnd +/-Delta S range. .
When the controller detects that the pressure difference value of two sides of the electric switch valve of the water outlet pipe of the high-temperature cold water coil is smaller than a set value delta P2, the high-temperature cold source system stops cooling, the controller closes the electric control valve on the water outlet pipe of the high-temperature cold water coil, opens the electric valve on the water outlet pipe of the low-temperature cold water coil, detects the water inlet temperature of the low-temperature cold water coil, and when the water inlet temperature T is smaller than A, the unit enters a series mode to operate. And when the water inlet temperature A is less than or equal to T and less than or equal to A plus delta A, the unit enters a low-temperature cold water coil independent operation mode.
The utility model has the advantages that: the control is simple and reliable, and the high-temperature cold source can be fully and preferentially utilized: the operation mode of the equipment can be controlled according to the temperature of the water inlet pipe, and energy is fully utilized; can be according to return air temperature, satisfy the return air temperature demand through the aperture of controller control governing valve.
Claims (8)
1. A multifunctional double-coil air handling unit is characterized by comprising a unit shell, a high-temperature cold water coil, a low-temperature cold water coil, a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe, a communicating pipe, a first regulating valve, a second regulating valve, an electric communicating valve and a controller, wherein the high-temperature cold water coil and the low-temperature cold water coil are arranged in the unit shell, the first water inlet pipe and the first water outlet pipe are respectively communicated with a water inlet and a water outlet of the high-temperature cold water coil, and the second water inlet pipe and the second water outlet pipe are respectively communicated with the water inlet and the water outlet of the low-temperature cold water; one end of the communicating pipe is communicated with the first water inlet pipe, the other end of the communicating pipe is communicated with the second water inlet pipe between the first regulating valve and the low-temperature cold water coil pipe, and the electric communicating valve is arranged on the communicating pipe; the first regulating valve, the second regulating valve and the electric communicating valve are respectively and electrically connected with the controller.
2. The air handling unit of claim 1, wherein the first outlet pipe is provided with a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are respectively disposed on two sides of the first regulating valve.
3. The air handling unit of claim 1, wherein the first inlet conduit is configured with a first temperature sensor, and the first temperature sensor is electrically connected to the controller.
4. The air handling unit of claim 1, wherein the second inlet conduit is configured with a second temperature sensor, and the second temperature sensor is electrically connected to the controller.
5. A multi-functional double coil air handling unit according to claim 1 or 2 or 3 or 4, wherein the first inlet conduit is provided with a check valve disposed upstream of the communication conduit.
6. The air handling unit of claim 1, 2, 3 or 4 further comprising a blower and a return air inlet, wherein the blower and the return air inlet are respectively disposed on opposite sides of the unit housing, and the blower is disposed on a side adjacent to the low temperature cold water coil.
7. The air handling unit of claim 6, wherein the low temperature chilled water coil is provided with a supply air temperature sensor near the air outlet side; the air supply temperature sensors are respectively and electrically connected with the controller.
8. The multifunctional double-coil air handling unit as claimed in claim 6, wherein an intermediate temperature sensor is arranged between the high-temperature cold water coil and the low-temperature cold water coil, and a return air temperature sensor is arranged on one side of the high-temperature cold water coil close to the return air inlet; the return air temperature sensor and the intermediate temperature sensor are respectively electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020647248.8U CN212409023U (en) | 2020-04-24 | 2020-04-24 | Multifunctional double-coil air handling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020647248.8U CN212409023U (en) | 2020-04-24 | 2020-04-24 | Multifunctional double-coil air handling unit |
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| Publication Number | Publication Date |
|---|---|
| CN212409023U true CN212409023U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020647248.8U Expired - Fee Related CN212409023U (en) | 2020-04-24 | 2020-04-24 | Multifunctional double-coil air handling unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN212409023U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091140A (en) * | 2021-05-25 | 2021-07-09 | 中国工商银行股份有限公司 | Multilayer coil air conditioning unit and coil position adjusting method |
| CN114087674A (en) * | 2021-10-27 | 2022-02-25 | 珠海格力电器股份有限公司 | Double-cold-source control system, method and device |
-
2020
- 2020-04-24 CN CN202020647248.8U patent/CN212409023U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091140A (en) * | 2021-05-25 | 2021-07-09 | 中国工商银行股份有限公司 | Multilayer coil air conditioning unit and coil position adjusting method |
| CN113091140B (en) * | 2021-05-25 | 2022-04-29 | 中国工商银行股份有限公司 | Multilayer coil air conditioning unit and coil position adjusting method |
| CN114087674A (en) * | 2021-10-27 | 2022-02-25 | 珠海格力电器股份有限公司 | Double-cold-source control system, method and device |
| CN114087674B (en) * | 2021-10-27 | 2023-02-17 | 珠海格力电器股份有限公司 | Double-cold-source control system, method and device |
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Granted publication date: 20210126 Termination date: 20210424 |