CN105180539B - A kind of heat pump unit antifreeze control method and system - Google Patents
A kind of heat pump unit antifreeze control method and system Download PDFInfo
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- CN105180539B CN105180539B CN201510567505.0A CN201510567505A CN105180539B CN 105180539 B CN105180539 B CN 105180539B CN 201510567505 A CN201510567505 A CN 201510567505A CN 105180539 B CN105180539 B CN 105180539B
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Abstract
The invention discloses a kind of heat pump unit antifreeze control method of the present invention and systems; method includes detecting the operating mode of current heat pump unit; detect whether current state meets one of refrigeration antifreeze condition during refrigeration mode, if so, control heat pump unit enters anti-freezing protection mode；Detect whether current state meets all heating antifreeze conditions during heating mode, if so, control heat pump unit enters anti-freezing protection mode.System includes mode checking unit, the antifreeze detection unit of refrigeration and the antifreeze detection unit of heating.The present invention has been can effectively prevent in cooling in summer when water flow situation less than normal occurs in unit, and system is because evaporator occurs freezing quick-fried situation caused by evaporating pressure is relatively low；Disengaging coolant-temperature gage can not only effectively be avoided to occur the situation of negative value in a heating mode when heating in winter, greatly promote the comfort level of user, and can be prevented because temperature is too low to the situation of booting when just opening machine.It the composite can be widely applied in heat pump unit.
Description
Technical field
The present invention relates to heat pump control technology field more particularly to a kind of heat pump unit antifreeze control method and systems.
Background technology
The antifreeze control method of heat pump was in the past：When unit freezes, when leaving water temperature≤5 DEG C, controller control unit
Start anti-frost protection；When unit heats, when leaving water temperature≤4 DEG C, controller control unit starting anti-frost protection.Such control
Although method processed plays the purpose of anti-frost protection, but problems with still occur during later stage user's use：
When summer unit freezes, if unit is not provided with water compensating valve, either water flow switch catch breaks down, will
It is less than normal to be susceptible to unit water flow, so that machine set system evaporating pressure is too low, evaporator moment is caused to freeze, evaporator
It is easily frozen quick-fried；And during the heating of winter unit, then usually machine is not opened because leaving water temperature when just opening machine is too low.
It also will appear in many cases simultaneously and unit current state shown on controller as heating, but entire machine set system
Because disengaging water temperature difference is negative value, actually in the situation for carrying out refrigeration mode operation, the comfort level of user is leveraged.
Invention content
In order to solve the above-mentioned technical problem, it is realized simply, and the one of unit can be protected the object of the present invention is to provide a kind of
Kind heat pump unit antifreeze control method and system.
The technical solution adopted in the present invention is：
A kind of heat pump unit antifreeze control method, includes the following steps：
A, the operating mode of current heat pump unit is detected, if current operating mode is refrigeration mode, performs step B；
If current operating mode is heating mode, step C is performed；
B, after compressor unlatching reaches default detection time, it is antifreeze whether detection current state meets one of refrigeration
Condition, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then current operation mode is kept to work on；
C, after compressor unlatching reaches default detection time, whether detection current state meets all antifreeze items of heating
Part, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then current operation mode is kept to work on.
As a kind of being further improved for heat pump unit antifreeze control method, further include：
D, detect whether current leaving water temperature is more than the preset antifreeze temperature spot of water outlet and preset anti-frost protection return difference
The sum of value, if so, exiting anti-freezing protection mode and recovery system operation；Conversely, then keep current operation mode constant.
As a kind of being further improved for heat pump unit antifreeze control method, the refrigeration in the step B is antifreeze
Condition specifically includes：
Whether the current leaving water temperature of B1, detection is less than or equal to the preset antifreeze temperature spot of water outlet；
It is anti-equal to preset whether the current back pressure of B2, detection is respectively less than in lasting preset pressure detection time
Freeze pressure threshold.
As a kind of being further improved for heat pump unit antifreeze control method, the heating in the step C is antifreeze
Condition specifically includes：
Whether lower than inflow temperature 2 DEG C current of leaving water temperature of C1, detection or more；
Whether the current leaving water temperature of C2, detection is less than or equal to the preset antifreeze temperature spot of water outlet.
Another technical solution of the present invention is：
A kind of heat pump unit antifreeze control system, including：
Mode checking unit, for detecting the operating mode of current heat pump unit, if current operating mode is refrigeration mould
Formula then performs the antifreeze detection unit of refrigeration；If current operating mode is heating mode, the antifreeze detection unit of heating is performed；
Freeze antifreeze detection unit, for after compressor unlatching reaches default detection time, whether detection current state
Meet one of antifreeze condition of refrigeration, if so, control heat pump unit enters anti-freezing protection mode；Conversely, it then keeps current
Operating mode works on；
Antifreeze detection unit is heated, for after compressor unlatching reaches default detection time, whether is detection current state
Meet all antifreeze conditions of heating, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then keep work at present
Pattern works on.
As a kind of being further improved for heat pump unit antifreeze control system, further include：
It is antifreeze to exit detection unit, for detect current leaving water temperature whether be more than the antifreeze temperature spot of preset water outlet with
The sum of preset anti-frost protection return difference value, if so, exiting anti-freezing protection mode and recovery system operation；Conversely, it then keeps working as
Preceding operating mode is constant.
As a kind of being further improved for heat pump unit antifreeze control system, the antifreeze detection unit of refrigeration,
It is specifically included：
The first antifreeze condition detection unit of refrigeration, for detecting whether current leaving water temperature is less than or equal to preset water outlet
Antifreeze temperature spot；
The second antifreeze condition detection unit of refrigeration, for detecting whether current back pressure is examined in lasting preset pressure
It surveys to be respectively less than in the time and is equal to preset anti-freezing pressure threshold value.
As a kind of being further improved for heat pump unit antifreeze control system, the antifreeze detection unit of heating,
It is specifically included：
The first antifreeze condition detection unit of heating, for detect current leaving water temperature it is whether lower than inflow temperature 2 DEG C or
More；
The second antifreeze condition detection unit of heating, for detecting whether current leaving water temperature is less than or equal to preset water outlet
Antifreeze temperature spot.
The beneficial effects of the invention are as follows：
A kind of heat pump unit antifreeze control method of the present invention and system are by detecting current operation mode, then according to work
Pattern carries out different antifreeze detections, in cooling in summer, the energy leaving water temperature of real-time detecting system and system return air pressure, when
Meet any one detection control condition, just enable anti-frost protection, effectively prevent when water flow situation less than normal occurs in unit,
System is because evaporator occurs freezing quick-fried situation caused by evaporating pressure is relatively low；When heating in winter, by by leaving water temperature
After being compared with inflow temperature and the antifreeze temperature spot of water outlet, while meet the temperature detection control conditions of two settings, just into
Enter anti-frost protection, disengaging coolant-temperature gage can not only effectively be avoided to occur the situation of negative value in a heating mode, greatly promote user's
Comfort level, and can prevent because temperature is too low to the situation of booting when just opening machine.
Description of the drawings
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of step flow chart of heat pump unit antifreeze control method of the present invention；
Fig. 2 is a kind of block diagram of heat pump unit antifreeze control system of the present invention.
Specific embodiment
With reference to figure 1, a kind of heat pump unit antifreeze control method of the present invention includes the following steps：
A, the operating mode of current heat pump unit is detected, if current operating mode is refrigeration mode, performs step B；
If current operating mode is heating mode, step C is performed；
B, after compressor unlatching reaches default detection time, it is antifreeze whether detection current state meets one of refrigeration
Condition, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then current operation mode is kept to work on；
C, after compressor unlatching reaches default detection time, whether detection current state meets all antifreeze items of heating
Part, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then current operation mode is kept to work on.
Preferred embodiment is further used as, is further included：
D, detect whether current leaving water temperature is more than the preset antifreeze temperature spot of water outlet and preset anti-frost protection return difference
The sum of value, if so, exiting anti-freezing protection mode and recovery system operation；Conversely, then keep current operation mode constant.
It is further used as preferred embodiment, the antifreeze condition of refrigeration in the step B specifically includes：
Whether the current leaving water temperature of B1, detection is less than or equal to the preset antifreeze temperature spot of water outlet；
It is anti-equal to preset whether the current back pressure of B2, detection is respectively less than in lasting preset pressure detection time
Freeze pressure threshold.
It is further used as preferred embodiment, the antifreeze condition of heating in the step C specifically includes：
Whether lower than inflow temperature 2 DEG C current of leaving water temperature of C1, detection or more；
Whether the current leaving water temperature of C2, detection is less than or equal to the preset antifreeze temperature spot of water outlet.
With reference to figure 2, a kind of heat pump unit antifreeze control system of the invention, including：
Mode checking unit, for detecting the operating mode of current heat pump unit, if current operating mode is refrigeration mould
Formula then performs the antifreeze detection unit of refrigeration；If current operating mode is heating mode, the antifreeze detection unit of heating is performed；
Freeze antifreeze detection unit, for after compressor unlatching reaches default detection time, whether detection current state
Meet one of antifreeze condition of refrigeration, if so, control heat pump unit enters anti-freezing protection mode；Conversely, it then keeps current
Operating mode works on；
Antifreeze detection unit is heated, for after compressor unlatching reaches default detection time, whether is detection current state
Meet all antifreeze conditions of heating, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then keep work at present
Pattern works on.
Preferred embodiment is further used as, is further included：
It is antifreeze to exit detection unit, for detect current leaving water temperature whether be more than the antifreeze temperature spot of preset water outlet with
The sum of preset anti-frost protection return difference value, if so, exiting anti-freezing protection mode and recovery system operation；Conversely, it then keeps working as
Preceding operating mode is constant.
Preferred embodiment is further used as, the antifreeze detection unit of refrigeration specifically includes：
The first antifreeze condition detection unit of refrigeration, for detecting whether current leaving water temperature is less than or equal to preset water outlet
Antifreeze temperature spot；
The second antifreeze condition detection unit of refrigeration, for detecting whether current back pressure is examined in lasting preset pressure
It surveys to be respectively less than in the time and is equal to preset anti-freezing pressure threshold value.
Preferred embodiment is further used as, the antifreeze detection unit of heating specifically includes：
The first antifreeze condition detection unit of heating, for detect current leaving water temperature it is whether lower than inflow temperature 2 DEG C or
More；
The second antifreeze condition detection unit of heating, for detecting whether current leaving water temperature is less than or equal to preset water outlet
Antifreeze temperature spot.
Specific embodiments of the present invention are as follows：
In the specific embodiment of the invention, it is 30s to preset detection time, and anti-freezing pressure threshold value is 5bar, and preset pressure detects
Time is 10s.
When in refrigeration mode, after compressor is opened 30 seconds, if detecting the antifreeze temperature spot of leaving water temperature≤water outlet or returning
When the continuous 10s of atmospheric pressure detects back pressure≤5bar, as long as meeting any one condition, then heat pump unit is controlled to enter anti-
Freeze protected mode.
When in heating mode, after compressor is opened 30 seconds, when detection leaving water temperature≤- 2 DEG C of inflow temperature, and go out water temperature
After the antifreeze temperature spot of degree≤water outlet, while during two conditions of satisfaction, then heat pump unit is controlled to enter anti-freezing protection mode.
When in anti-freezing protection mode, when detecting that leaving water temperature ＞ is discharged antifreeze temperature spot+anti-frost protection return difference value, then
Exit anti-freezing protection mode and recovery system operation or can manual recovery system rerun.
From the foregoing it can be that a kind of heat pump unit antifreeze control method of the present invention and system are by detecting work at present mould
Then formula carries out different antifreeze detection according to operating mode, in cooling in summer, can real-time detecting system leaving water temperature and
System return air pressure when meeting any one detection control condition, just enables anti-frost protection, effectively prevents water occur when unit
During flow situation less than normal, system is because evaporator occurs freezing quick-fried situation caused by evaporating pressure is relatively low；When heating in winter,
After leaving water temperature and inflow temperature and the antifreeze temperature spot of water outlet are compared, while meet the temperature detection of two settings
Control condition just into anti-frost protection, can not only effectively avoid disengaging coolant-temperature gage from occurring the situation of negative value in a heating mode, greatly
It is big to promote the comfort level of user, and can prevent because temperature is too low to the situation of booting when just opening machine.
It is that the preferable of the present invention is implemented to be illustrated, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations under the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of heat pump unit antifreeze control method, which is characterized in that include the following steps：
A, the operating mode of current heat pump unit is detected, if current operating mode is refrigeration mode, performs step B；If work as
Preceding operating mode is heating mode, then performs step C；
B, after compressor unlatching reaches default detection time, whether detection current state meets one of antifreeze item of refrigeration
Part, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then current operation mode is kept to work on；
C, after compressor unlatching reaches default detection time, whether detection current state meets all antifreeze conditions of heating, if
It is then heat pump unit to be controlled to enter anti-freezing protection mode；Conversely, then current operation mode is kept to work on；
The antifreeze condition of refrigeration in the step B, specifically includes：
Whether the current leaving water temperature of B1, detection is less than or equal to the preset antifreeze temperature spot of water outlet；
Whether the current back pressure of B2, detection is respectively less than in lasting preset pressure detection time is equal to preset antifreeze pressure
Force threshold；
The antifreeze condition of heating in the step C, specifically includes：
Whether lower than inflow temperature 2 DEG C current of leaving water temperature of C1, detection or more；
Whether the current leaving water temperature of C2, detection is less than or equal to the preset antifreeze temperature spot of water outlet.
2. a kind of heat pump unit antifreeze control method according to claim 1, it is characterised in that：It further includes：
D, detect current leaving water temperature whether be more than the preset antifreeze temperature spot of water outlet and preset anti-frost protection return difference value it
With, if so, exit anti-freezing protection mode and recovery system operation；Conversely, then keep current operation mode constant.
3. a kind of heat pump unit antifreeze control system, which is characterized in that including：
Mode checking unit, for detecting the operating mode of current heat pump unit, if current operating mode is refrigeration mode,
Perform antifreeze detection unit of freezing；If current operating mode is heating mode, the antifreeze detection unit of heating is performed；
Freeze antifreeze detection unit, for after compressor unlatching reaches default detection time, whether detection current state to meet
One of antifreeze condition of refrigeration, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then keep work at present
Pattern works on；
Antifreeze detection unit is heated, for after compressor unlatching reaches default detection time, whether detection current state to meet
All antifreeze conditions of heating, if so, control heat pump unit enters anti-freezing protection mode；Conversely, then keep current operation mode
It works on；
The antifreeze detection unit of refrigeration, specifically includes：
The first antifreeze condition detection unit of refrigeration, it is whether antifreeze less than or equal to preset water outlet for detecting current leaving water temperature
Temperature spot；
The second antifreeze condition detection unit of refrigeration, for detecting current back pressure whether in lasting preset pressure detection
Interior be respectively less than is equal to preset anti-freezing pressure threshold value；
The antifreeze detection unit of heating, specifically includes：
The first antifreeze condition detection unit of heating, for detecting whether lower than inflow temperature 2 DEG C of current leaving water temperature or more；
The second antifreeze condition detection unit of heating, it is whether antifreeze less than or equal to preset water outlet for detecting current leaving water temperature
Temperature spot.
4. a kind of heat pump unit antifreeze control system according to claim 3, it is characterised in that：It further includes：
It is antifreeze to exit detection unit, for detecting whether current leaving water temperature is more than the preset antifreeze temperature spot of water outlet with presetting
The sum of anti-frost protection return difference value, if so, exiting anti-freezing protection mode and recovery system operation；Conversely, then keep current work
Operation mode is constant.
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| CN201510567505.0A CN105180539B (en) | 2015-09-08 | 2015-09-08 | A kind of heat pump unit antifreeze control method and system |
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| CN201510567505.0A CN105180539B (en) | 2015-09-08 | 2015-09-08 | A kind of heat pump unit antifreeze control method and system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107525297A (en) * | 2017-08-22 | 2017-12-29 | 广东美的暖通设备有限公司 | Antifreeze control method, constant speed air-conditioning system and storage medium |
| CN107906811B (en) * | 2017-10-12 | 2021-11-02 | 青岛海尔空调电子有限公司 | Anti-freezing control method for heat pump unit |
| CN110440439A (en) * | 2019-08-09 | 2019-11-12 | 广东高而美制冷设备有限公司 | A kind of low temperature antifreeze control method of heat pump water dispenser system |
| CN113623706B (en) * | 2020-05-09 | 2023-05-16 | 艾默生环境优化技术(苏州)有限公司 | Anti-freezing protection method, anti-freezing protection system and water system heat pump unit |
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| CN102538300A (en) * | 2012-02-14 | 2012-07-04 | 青岛海尔空调电子有限公司 | Air-cooling heat pump unit and anti-freezing method for plate heat exchanger |
| CN104534622A (en) * | 2014-12-19 | 2015-04-22 | 珠海格力电器股份有限公司 | Air conditioner anti-freezing control method and device |
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| CN1979063B (en) * | 2005-12-02 | 2010-05-12 | 深圳麦克维尔空调有限公司 | Anti-freezing method of air conditioner |
| CN104422076B (en) * | 2013-08-21 | 2017-06-20 | 珠海格力电器股份有限公司 | Air-conditioner refrigeration unit and its antifreeze control method |
| CN104676993B (en) * | 2015-02-13 | 2017-11-14 | 广东芬尼克兹节能设备有限公司 | A kind of standby antifreeze control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538300A (en) * | 2012-02-14 | 2012-07-04 | 青岛海尔空调电子有限公司 | Air-cooling heat pump unit and anti-freezing method for plate heat exchanger |
| CN104728999A (en) * | 2013-12-23 | 2015-06-24 | 珠海格力电器股份有限公司 | Antifreezing control method and device of air-conditioner heat exchanger |
| CN104534622A (en) * | 2014-12-19 | 2015-04-22 | 珠海格力电器股份有限公司 | Air conditioner anti-freezing control method and device |
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Effective date of registration: 20200408 Address after: 511470 one of the first floors of Building 1, No. 3, Tianyuan Road, Dagang Town, Nansha District, Guangzhou City, Guangdong Province Patentee after: GUANGDONG PHNIX ENERGY TECHNOLOGY Co.,Ltd. Address before: 511470 Yaohua Industrial Park, Xingye Road, Dagang Town, Guangzhou, Guangdong, Nansha District Patentee before: Guangdong Phnix Eco-energy Solution Ltd. |
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