CN207649187U - Water chilling unit and starting control device thereof - Google Patents
Water chilling unit and starting control device thereof Download PDFInfo
- Publication number
- CN207649187U CN207649187U CN201721470903.1U CN201721470903U CN207649187U CN 207649187 U CN207649187 U CN 207649187U CN 201721470903 U CN201721470903 U CN 201721470903U CN 207649187 U CN207649187 U CN 207649187U
- Authority
- CN
- China
- Prior art keywords
- chilling units
- water chilling
- compressor
- handpiece water
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000000498 cooling water Substances 0.000 claims abstract description 21
- 238000001704 evaporation Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses a cooling water set and start control device thereof, wherein, start control device includes: the first temperature sensor is arranged at a chilled water outlet of an evaporator of the water chilling unit and used for detecting the temperature of the chilled water outlet; the second temperature sensor is arranged at a cooling water outlet of a condenser of the water chilling unit and used for detecting the temperature of the cooling water outlet; and the controller is connected with the first temperature sensor and the second temperature sensor, is connected with an electronic expansion valve of the water chilling unit and the compressor, and is used for adjusting the opening of the electronic expansion valve to reach the preset time and then controlling the start of the compressor. Through the utility model discloses, avoid because the cooling water set start the compressor when being in the state of falling the difference in temperature and lead to the problem of converter or motor high temperature protection, guarantee that the unit can normally start under the high temperature day air freezes the water temperature and is higher than cooling water temperature condition.
Description
Technical field
The utility model is related to detection technique fields, and in particular to a kind of handpiece Water Chilling Units and its start control device.
Background technology
Handpiece Water Chilling Units are now widely used in all trades and professions, are a kind of common refrigeration equipments.In each component peace of unit
Fill environment temperature-difference it is little in the case of, handpiece Water Chilling Units can normally start work.However, when in summer high temperature weather
When, outdoor temperature is up to 40 DEG C, and large-scale handpiece Water Chilling Units are in certain use occasions (such as gymnasium) since end is directly installed on
Translucent ceiling place, when the sun is exposed to the sun lower handpiece Water Chilling Units in shutdown status, chilled water return water temperature can be very high, is no better than
40 DEG C of environment temperature, and cooling water flow path only has 27 DEG C or so due to being arranged in the place that do not shone directly by the sun, water temperature at this time.
In this case, when handpiece Water Chilling Units are switched on, chilled water temperature is higher by 13 DEG C than cooling water temperature, that is to say and is in the shape of falling the temperature difference
State.If if handpiece Water Chilling Units are started according to normal temperature control logic at this time, the preliminary stage of startup is caused due to pressure difference deficiency
Keep the cooling liquid supply rate of whose cold unit frequency-conversion device or motor inadequate, handpiece Water Chilling Units are easy report high temperature protection and shut down, and subsequently very
Difficulty starts up.
Two head units as shown in Figure 1, normal start-up procedure are first to start a compressor 1 ', and load on is to centainly
Restart an other compressor 2 ' when value.Under the state of falling the temperature difference, only open a compressor be difficult quickly establish pressure difference, and
In start-up course, since electric expansion valve 5 ' is controlled according to 4 ' liquid level sensor of evaporator, cause 5 ' aperture of electric expansion valve complete
It opens, is also unfavorable for the foundation of follow-up pressure difference.So unit startup stage will it is insufficient due to feed flow and cause frequency converter 8 ' or
Electromotor high-temperature is protected.
Utility model content
The utility model will solve to be easy to cause frequency converter or electricity when handpiece Water Chilling Units are in the state of falling the temperature difference in the prior art
The problem of machine high temperature protection causes handpiece Water Chilling Units to be shut down, to provide a kind of handpiece Water Chilling Units and its start control device.
The one side of the utility model embodiment provides a kind of startup control device of handpiece Water Chilling Units, including：First temperature
Sensor is spent, is arranged at the evaporator chilled water outlet of the handpiece Water Chilling Units, for detecting the chilled water outlet temperature；The
Two temperature sensors are arranged in the condenser cooling water exit of the handpiece Water Chilling Units, for detecting the cooling water outlet temperature
Degree；Controller is connect with first temperature sensor and the second temperature sensor, and with the electricity of the handpiece Water Chilling Units
Sub- expansion valve is connected with compressor, reaches pre- for adjusting the electronic expansion valve opening after the handpiece Water Chilling Units starting up
If the compressor start is controlled after the time again.
Optionally, further include：First pressure sensor is arranged on the evaporator, for detecting in the evaporator
Evaporating pressure；Second pressure sensor is arranged on the condenser, for detecting the condensing pressure in the condenser,
Wherein, the evaporating pressure and the condensing pressure are used for the control parameter as control electronic expansion valve opening.
Optionally, the compressor is the compressor of multiple parallel connections.
Optionally, the controller is same controller or different controllers from the controller of the handpiece Water Chilling Units.
Optionally, when the controller of the controller for starting control device and the handpiece Water Chilling Units is obstructed controller
When, the controller for starting control device is connect with the controller of the handpiece Water Chilling Units, is used for by the handpiece Water Chilling Units
Controller send commands to control the compressor start.
Optionally, the controller includes counter, and for starting timing when the handpiece Water Chilling Units start, timing reaches
The control command for starting compressor is sent when the preset time.
Optionally, the controller includes comparator, with first temperature sensor and the second temperature sensor
It is separately connected, is used for the magnitude relationship of the chilled water outlet temperature and the cooling water outlet temperature.
The another aspect of the utility model embodiment, it includes that evaporator, condenser, electronics are swollen to provide a kind of handpiece Water Chilling Units
Swollen valve and compressor further include：Above-mentioned startup control device.
Optionally, further include：Frequency converter, frequency converter throttle valve, cooling motor throttle valve and solenoid valve.
Optionally, the compressor is the compressor of multiple parallel connections.
In the utility model embodiment, freezing is detected respectively by using the first temperature sensor and second temperature sensor
Water outlet temperature and cooling water outlet temperature, the pressure difference that the condition adjudgement of falling the temperature difference is carried out by controller and adjusts handpiece Water Chilling Units, then
Start compressor, to avoid due to handpiece Water Chilling Units be in the state of falling the temperature difference when startup compressor lead to frequency converter or electromotor high-temperature
The problem of protection, ensures that unit can normally start under the conditions of hot weather chilled water temperature is higher than cooling water temperature.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of handpiece Water Chilling Units in the prior art；
Fig. 2 is the schematic diagram of the startup control device of handpiece Water Chilling Units in the utility model embodiment；
Fig. 3 is a kind of schematic diagram of handpiece Water Chilling Units in the utility model embodiment；
Fig. 4 is the schematic diagram of the startup control device of another handpiece Water Chilling Units in the utility model embodiment.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality
Novel protected range.
In the description of the present invention, it should be noted that term " connection " includes being directly connected to or being indirectly connected with.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below does not constitute punching each other
It is prominent to be combined with each other.
The utility model embodiment provides a kind of startup control device of handpiece Water Chilling Units, which can use
It is controlled in the startup of handpiece Water Chilling Units.
As shown in Fig. 2, the startup control device includes：First temperature sensor 11, second temperature sensor 12 and control
Device 13.
First temperature sensor 11 is arranged at the evaporator chilled water outlet of handpiece Water Chilling Units, for detecting chilled water outlet
Temperature.
Second temperature sensor 12 is arranged in the condenser cooling water exit of handpiece Water Chilling Units, for detecting cooling water outlet
Temperature.
Controller 13 is connect with the first temperature sensor 11 and second temperature sensor 12, and with the electronics of handpiece Water Chilling Units
Expansion valve is connected with compressor, is reached after preset time again for adjusting electronic expansion valve opening after handpiece Water Chilling Units starting up
Control compressor start.It is to improve the pressure difference of compressor, make frequency conversion that the aperture of adjustment electric expansion valve, which reaches preset time,
The liquid supply rate of device or motor reaches requirement.
The state of falling the temperature difference described in the utility model can refer to that chilled water outlet temperature is far above cooling water outlet temperature
State, such as chilled water outlet temperature and the temperature difference of cooling water outlet temperature reach certain value.It is determined in controller cold
When water dispenser group is in the state of falling the temperature difference, first the aperture of electric expansion valve is adjusted, to adjust the pressure difference of handpiece Water Chilling Units.When
When pressure difference meets entry condition after preset time, restart compressor.
In the utility model embodiment, freezing is detected respectively by using the first temperature sensor and second temperature sensor
Water outlet temperature and cooling water outlet temperature, the pressure difference for carrying out judging to adjust handpiece Water Chilling Units by controller, restart compressor, from
And avoid the problem that causing frequency converter or electromotor high-temperature to be protected due to starting compressor when handpiece Water Chilling Units are in the state of falling the temperature difference, it protects
Card unit can normally start under the conditions of hot weather chilled water temperature is higher than cooling water temperature.
Optionally, the startup control device of the utility model embodiment further includes：First pressure sensor, setting are being evaporated
On device, for detecting the evaporating pressure in evaporator；Second pressure sensor is arranged on condenser, for detecting condenser
Interior condensing pressure, wherein evaporating pressure and condensing pressure are used for the control parameter as control electronic expansion valve opening.
It, can be by first pressure sensor and for the control strategy of electric expansion valve in the utility model embodiment
Evaporating pressure and condensing pressure that two pressure sensors detect determines.
For example, being judged by the pressure ratio of condensing pressure and evaporating pressure：
As pressure ratio ξ≤compressor minimum pressure ratio value ξ min, turn down electronic expansion valve opening, by initial opening value limit to
The default opening value (such as 10%, determined by electronic expansion valve characteristic) of minimum；
When compressor minimum pressure ratio value ξ min ＜ pressure ratios ξ≤(compressor minimum pressure ratio value ξ min+ compressor maximum pressure ratio values
ξ max)/2 when, aperture before holding keeps initial opening；
As (ξ min+ ξ max)/2 ＜ pressure ratio ξ≤ξ max, big electric expansion valve is opened, pressure ratio limits electronics within this range
Expansion valve maximum opening avoids expansion valve opening is excessive under lower pressure difference from causing pressure difference fast to intermediate opening value (such as 50%)
Speed reduces；
As pressure ratio ξ ＞ ξ max, unit opens big electric expansion valve, can be maximum opening value.
Specifically, it is described by taking Fig. 3 and handpiece Water Chilling Units shown in Fig. 4 as an example.
As shown in figure 3, the handpiece Water Chilling Units include compressor 1, compressor 2, condenser 3, evaporator 4, electric expansion valve 5,
Frequency converter throttle valve 6, motor throttle valve 7, frequency converter 8, solenoid valve 9 etc..As shown in figure 4, the startup of the utility model embodiment
Control device includes：First temperature sensor 11, second temperature sensor 12, controller 13, first pressure sensor 14, second
Pressure sensor 15, control load include：Compressor 1, compressor 2 and electric expansion valve 5 etc..Input signal is the steaming detected
Send out pressure, condensing pressure, cooling water outlet temperature and chilled water outlet temperature.Controller 13 loads control by output signal
It is controlled.
It should be noted that in the utility model embodiment, start the cold water that control device can be used for single compressor
Unit can also be the handpiece Water Chilling Units of two compressor parallels as described in Figure 3, can be also used for the compression of 2 more parallels
The handpiece Water Chilling Units of machine.
Optionally, the controller of the utility model embodiment and the controller of handpiece Water Chilling Units can be same controller,
Can be different controllers.When for same controller, which can both control electric expansion valve in start-up course early period
Aperture, the operating of entire handpiece Water Chilling Units can also be controlled under normal temperature control logic again.When for different controllers,
The controller can be connect with the controller of handpiece Water Chilling Units, by the controllers of handpiece Water Chilling Units indirectly with electric expansion valve and compression
Machine connects, and controls it；It can also be directly to be connect with electric expansion valve and compressor, control it.
Further, in the utility model embodiment, controller may include the components such as timer, comparator, wherein meter
When device can carry out timing with to control time.Such as when timing reaches preset time, control is informed by sending control command
Device control processed starts compressor.Comparator can then be connect with the first temperature sensor and second temperature sensor, for judging
Magnitude relationship between the two.Controller determines whether to be in the state of falling the temperature difference according to the output result of comparator.
The utility model embodiment additionally provides a kind of handpiece Water Chilling Units, including evaporator, condenser, electric expansion valve and pressure
Contracting machine further includes：The startup control device that the utility model above-described embodiment is provided.Further, the utility model is implemented
Example handpiece Water Chilling Units further include：Frequency converter, frequency converter throttle valve, cooling motor throttle valve and solenoid valve etc., the utility model are real
The evaporator for applying example can be shell-tube evaporator, and condenser can be Shell-tube Condenser.Referring specifically to the description as described in Fig. 3, this
In repeat no more.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
Among changing still in the protection domain of the application.
Claims (10)
1. a kind of startup control device of handpiece Water Chilling Units, which is characterized in that including：
First temperature sensor is arranged at the evaporator chilled water outlet of the handpiece Water Chilling Units, for detecting the chilled water
Outlet temperature；
Second temperature sensor is arranged in the condenser cooling water exit of the handpiece Water Chilling Units, for detecting the cooling water
Outlet temperature；
Controller is connect with first temperature sensor and the second temperature sensor, and with the handpiece Water Chilling Units
Electric expansion valve is connected with compressor, is reached for adjusting the electronic expansion valve opening after the handpiece Water Chilling Units starting up
The compressor start is controlled after preset time again.
2. startup control device according to claim 1, which is characterized in that further include：
First pressure sensor is arranged on the evaporator, for detecting the evaporating pressure in the evaporator；
Second pressure sensor is arranged on the condenser, for detecting the condensing pressure in the condenser,
Wherein, the evaporating pressure and the condensing pressure are used for the control parameter as control electronic expansion valve opening.
3. startup control device according to claim 1, which is characterized in that the compressor is the compression of multiple parallel connections
Machine.
4. startup control device according to claim 1, which is characterized in that the control of the controller and the handpiece Water Chilling Units
Device processed is same controller or different controllers.
5. startup control device according to claim 4, which is characterized in that when it is described start control device controller with
When the controller of the handpiece Water Chilling Units is obstructed controller, the controller for starting control device and the handpiece Water Chilling Units
Controller connects, for by sending commands to control the compressor start to the controller of the handpiece Water Chilling Units.
6. startup control device according to claim 1, which is characterized in that the controller includes counter, is used for
The handpiece Water Chilling Units start timing when starting, timing sends the control command for starting compressor when reaching the preset time.
7. startup control device according to claim 1, which is characterized in that the controller includes comparator, and described
First temperature sensor and the second temperature sensor are separately connected, for the chilled water outlet temperature and described cold
But the magnitude relationship of water outlet temperature.
8. a kind of handpiece Water Chilling Units, including evaporator, condenser, electric expansion valve and compressor, which is characterized in that further include：Power
Profit requires 1 to 7 any one of them to start control device.
9. handpiece Water Chilling Units according to claim 8, which is characterized in that further include：Frequency converter, frequency converter throttle valve, cooling
Motor throttle valve and solenoid valve.
10. handpiece Water Chilling Units according to claim 8, which is characterized in that the compressor is the compressor of multiple parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470903.1U CN207649187U (en) | 2017-11-07 | 2017-11-07 | Water chilling unit and starting control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721470903.1U CN207649187U (en) | 2017-11-07 | 2017-11-07 | Water chilling unit and starting control device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207649187U true CN207649187U (en) | 2018-07-24 |
Family
ID=62884605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721470903.1U Active CN207649187U (en) | 2017-11-07 | 2017-11-07 | Water chilling unit and starting control device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207649187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741111A (en) * | 2017-11-07 | 2018-02-27 | 珠海格力电器股份有限公司 | Water chilling unit and starting control method and device thereof |
| CN113137713A (en) * | 2021-03-10 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method of air conditioning system and air conditioning system |
-
2017
- 2017-11-07 CN CN201721470903.1U patent/CN207649187U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741111A (en) * | 2017-11-07 | 2018-02-27 | 珠海格力电器股份有限公司 | Water chilling unit and starting control method and device thereof |
| CN107741111B (en) * | 2017-11-07 | 2023-06-30 | 珠海格力电器股份有限公司 | Water chilling unit and start control method and device thereof |
| CN113137713A (en) * | 2021-03-10 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method of air conditioning system and air conditioning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105627524B (en) | Air conditioner anti-freeze control method and air conditioner | |
| WO2020062598A1 (en) | Operation control method and apparatus for water multi-split unit, and medium and water multi-split air-conditioning system | |
| US10982890B2 (en) | Air conditioner, and device and method for preventing cold air during heating of air conditioner | |
| CN108759290B (en) | Frequency control method for compressor of variable frequency refrigerator | |
| CN105258301A (en) | Air-conditioner and control method and device for compressor in air-conditioner | |
| CN107741111B (en) | Water chilling unit and start control method and device thereof | |
| CN106015067A (en) | Fan rotation speed control method, control system and water tank | |
| CN109297220A (en) | Anti-freezing control method and device and computer readable storage medium | |
| CN109751911B (en) | Self-adaptive adjusting method for fan frequency of cooling tower and air conditioning system | |
| US20160200176A1 (en) | Method for Controlling Vehicle Air-Conditioning System, and Vehicle Air-Conditioning System | |
| CN109489217B (en) | Control method for preventing variable frequency air conditioner from stopping when temperature is reached | |
| CN106595126B (en) | Outer unit control system, heat pump unit and control method thereof | |
| US20130180690A1 (en) | Outdoor unit of refrigeration device | |
| CN107763792B (en) | Control method of multi-connected air conditioning unit | |
| CN207649187U (en) | Water chilling unit and starting control device thereof | |
| CN103486700A (en) | Air conditioner and control method thereof | |
| CN110260492B (en) | Fan and compressor control method under refrigeration mode of variable frequency air conditioner | |
| CN110686390B (en) | Control method and system for preventing mainboard condensation of frequency converter and air conditioner | |
| WO2023000700A1 (en) | Control method for multi-split air conditioner, and multi-split air conditioner and storage medium | |
| CN107642879B (en) | Control method and device of air conditioning system and air conditioner | |
| CN107062515A (en) | A kind of water chilling unit control method | |
| CN110986276A (en) | Water multi-connected system anti-freezing control method, computer readable storage medium and air conditioner | |
| CN205783571U (en) | A kind of central air conditioner cooling system energy-saving control apparatus | |
| CN106642511A (en) | Window type air conditioner and control method and device thereof | |
| CN107763887B (en) | Energy level control method and control device for dual-system heat pump unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |