CN105546732A - Multi-connected air conditioning system and outdoor unit pressure relief control method thereof - Google Patents
Multi-connected air conditioning system and outdoor unit pressure relief control method thereof Download PDFInfo
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- CN105546732A CN105546732A CN201510979521.0A CN201510979521A CN105546732A CN 105546732 A CN105546732 A CN 105546732A CN 201510979521 A CN201510979521 A CN 201510979521A CN 105546732 A CN105546732 A CN 105546732A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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Abstract
The invention discloses an outdoor unit pressure relief control method of a multi-connected air conditioning system. The multi-connected air conditioning system comprises compressors, a low-pressure tank and an outdoor heat exchanger. High-pressure exhaust ports of the compressors are connected to anti-freezing coil pipes at the bottom of the outdoor heat exchanger through pressure relief valves. Heat exchange assemblies of the outdoor heat exchanger communicate with the low pressure-tank. The low-pressure tank is connected to low-pressure air return ports of the compressors. The outdoor unit pressure relief control method of the multi-connected air conditioning system comprises the following steps that the pressure values of the high-pressure exhaust ports of the compressors are obtained; when the multi-connected air conditioning system operates in a pure heating mode or in a main heating mode, whether the pressure values of the high-pressure exhaust ports of the compressors are greater than or equal to a first preset pressure value or not is judged; and if the pressure values of the high-pressure exhaust ports of the compressors are greater than or equal to the first preset pressure value, the pressure relief valves are controlled to be opened so that the multi-connected air conditioning system can be in a high-pressure protection pressure relief mode. According to the method, pressure relief of the system is achieved by controlling the pressure relief valves, so that the situation that frequent starting and stopping of the system occur due to high-pressure protection is avoided. The invention further discloses the multi-connected air conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of outer machine release control method of multiple on-line system and a kind of multiple on-line system.
Background technology
Usually; the part throttle characteristics of heat-reclamation multi-compressors system is very complicated; wherein; under high-temperature refrigeration and peak load heating operation situation, or in a hybrid mode, refrigeration indoor set or heat indoor set capacity sudden change time; high pressure is all likely caused to rise violently; if now not in time, then can there is high voltage protective, thus cause system-down in outer machine release.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the outer machine release control method proposing a kind of multiple on-line system, carries out release, thus avoid system generation high voltage protective and occur frequent start-stop by controlling pressure-relief valve to system.
Another object of the present invention is to propose a kind of multiple on-line system.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of outer machine release control method of multiple on-line system, described multiple on-line system comprises compressor, low pressure tank and outdoor heat exchanger, the high-pressure exhaust of described compressor is connected to the bottom anti-freeze coil pipe of described outdoor heat exchanger by pressure-relief valve, the heat-exchanging component of described outdoor heat exchanger is connected with described low pressure tank, described low pressure tank is connected to the low pressure gas returning port of described compressor, and described outer machine release control method comprises the following steps: the force value obtaining the high-pressure exhaust of described compressor; When described multiple on-line system is run with pure heating mode or main heating mode, judge whether the force value of the high-pressure exhaust of described compressor is more than or equal to the first preset pressure value; If the force value of the high-pressure exhaust of described compressor is more than or equal to described first preset pressure value, then controls described pressure-relief valve positive opening and unload die pressing type to make described multiple on-line system enter anti-high voltage protective.
The outer machine release control method of the multiple on-line system of the embodiment of the present invention; in multiple on-line system with in pure heating mode or main heating mode running; if the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value; then control pressure-relief valve positive opening and unload die pressing type to make multiple on-line system enter anti-high voltage protective; the high pressure gaseous refrigerant part that now compressor flows out directly flows into low pressure tank by pressure-relief valve; thus the effective release realized system, avoid system generation high voltage protective and occur frequent start-stop.
According to one embodiment of present invention; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the second preset pressure value and continue the first Preset Time; then control described multiple on-line system to exit described anti-high voltage protective and unload die pressing type; wherein, described second preset pressure value is less than described first preset pressure value.
According to another embodiment of the invention; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the 3rd preset pressure value; then control described multiple on-line system to exit described anti-high voltage protective and unload die pressing type; wherein, described 3rd preset pressure value is less than described second preset pressure value.
According to one embodiment of present invention, described first preset pressure value is less than the high voltage protective threshold value of described multiple on-line system.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of multiple on-line system, comprise: compressor, low pressure tank and outdoor heat exchanger, the high-pressure exhaust of described compressor is connected to the bottom anti-freeze coil pipe of described outdoor heat exchanger by pressure-relief valve, the heat-exchanging component of described outdoor heat exchanger is connected with described low pressure tank, and described low pressure tank is connected to the low pressure gas returning port of described compressor; Control module; described control module is for obtaining the force value of the high-pressure exhaust of described compressor; and judge whether the force value of the high-pressure exhaust of described compressor is more than or equal to the first preset pressure value when described multiple on-line system is run with pure heating mode or main heating mode, and control described pressure-relief valve positive opening when the force value of the high-pressure exhaust of described compressor is more than or equal to described first preset pressure value and unload die pressing type to make described multiple on-line system enter anti-high voltage protective.
The multiple on-line system of the embodiment of the present invention; in multiple on-line system with in pure heating mode or main heating mode running; if the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value; then control pressure-relief valve positive opening and unload die pressing type to make multiple on-line system enter anti-high voltage protective; the high pressure gaseous refrigerant part that now compressor flows out directly flows into low pressure tank by pressure-relief valve; thus the effective release realized system, avoid system generation high voltage protective and occur frequent start-stop.
According to one embodiment of present invention; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the second preset pressure value and continue the first Preset Time; described control module then controls described multiple on-line system and exits described anti-high voltage protective and unload die pressing type; wherein, described second preset pressure value is less than described first preset pressure value.
According to another embodiment of the invention; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the 3rd preset pressure value; described control module then controls described multiple on-line system and exits described anti-high voltage protective and unload die pressing type; wherein, described 3rd preset pressure value is less than described second preset pressure value.
According to one embodiment of present invention, described first preset pressure value is less than the high voltage protective threshold value of described multiple on-line system.
According to one embodiment of present invention, described outdoor heat exchanger comprises left heat exchange unit and right heat exchange unit, the bottom of described left heat exchange unit and the bottom of right heat exchange unit are provided with anti-freeze coil pipe, wherein, the high-pressure exhaust of described compressor is connected respectively to the anti-freeze coil pipe of described left heat exchange unit and the anti-freeze coil pipe of described right heat exchange unit by described pressure-relief valve.
Accompanying drawing explanation
Fig. 1 is the flow chart of the outer machine release control method of multiple on-line system according to the embodiment of the present invention.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Outer machine release control method and the multiple on-line system of the multiple on-line system proposed according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the outer machine release control method of multiple on-line system according to the embodiment of the present invention.In an embodiment of the present invention, multiple on-line system comprises compressor, low pressure tank and outdoor heat exchanger, the high-pressure exhaust of compressor is connected to the bottom anti-freeze coil pipe of outdoor heat exchanger by pressure-relief valve, the heat-exchanging component of outdoor heat exchanger is connected with low pressure tank, and low pressure tank is connected to the low pressure gas returning port of compressor.
As shown in Figure 1, the outer machine release control method of this multiple on-line system comprises the following steps:
S1, obtains the force value of the high-pressure exhaust of compressor.
Particularly, the force value of the high-pressure exhaust of compressor can be obtained by the pressure sensor at the high-pressure exhaust place being arranged on compressor.
S2, when multiple on-line system is run with pure heating mode or main heating mode, judges whether the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value.
Wherein, when multiple on-line system is run with pure heating mode or main heating mode, outdoor heat exchanger absorbs heat from environment as evaporimeter.First preset pressure value can be demarcated according to actual conditions, and in one embodiment of the invention, the first preset pressure value is less than the high voltage protective threshold value of multiple on-line system.
S3, if the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value, then controls pressure-relief valve positive opening and unloads die pressing type to make multiple on-line system enter anti-high voltage protective.
Particularly, in multiple on-line system, defrosting water in order to avoid outdoor heat exchanger flows to chassis and piles up and secondary icing blocking water hole occurs, even outdoor heat exchanger can be damaged to vertical spread gradually time severe, therefore the bottom of outdoor heat exchanger is provided with anti-freeze coil pipe, and controls the break-make of anti-freeze coil pipe by controlling pressure-relief valve.When multiple on-line system is run with main heating mode; the force value of the high-pressure exhaust of Real-time Obtaining compressor; and it is judged; when the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value; control pressure-relief valve is opened; the high pressure gaseous refrigerant part now flowed out from the high-pressure exhaust of compressor directly flows into low pressure tank by pressure-relief valve and bottom anti-freeze coil pipe, thus realizes the release to system, anti-locking system generation high voltage protective.
According to one embodiment of present invention; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the second preset pressure value and continue the first Preset Time; then control multiple on-line system exits anti-high voltage protective and unloads die pressing type; wherein; second preset pressure value is less than the first preset pressure value, and the second preset pressure value and the first Preset Time all can be demarcated according to actual conditions.
According to another embodiment of the invention; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the 3rd preset pressure value; then control multiple on-line system exits anti-high voltage protective and unloads die pressing type; wherein; 3rd preset pressure value is less than the second preset pressure value, and the 3rd preset pressure value can be demarcated according to actual conditions.
Particularly; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the second preset pressure value and continue the first Preset Time; or the force value of the high-pressure exhaust of compressor is less than the 3rd preset pressure value; then control multiple on-line system exits anti-high voltage protective and unloads die pressing type; now according to other control logics, pressure-relief valve is controlled, comprise oil return control, defrosting control and outdoor heat exchanger volume controlled etc.
It should be noted that, when multiple on-line system is run with pure refrigeration mode or main refrigeration mode, outdoor heat exchanger is as condenser heat rejection.Now, because the volume of the bottom anti-freeze coil pipe of outdoor heat exchanger is smaller, can not storing excess refrigerant, and the relative aperture of pressure-relief valve is comparatively large, when pressure-relief valve is opened, the refrigerant that meeting bypass is more, and the bottom panel beating of outdoor heat exchanger blocks and the uneven weak heat-dissipating that will cause of air volume adjustment, finally cause total heat dissipation capacity of outdoor heat exchanger to reduce, outlet enthalpy is larger, when evaporating temperature one timing, its refrigerating capacity will reduce.Therefore, in multiple on-line system with in pure refrigeration mode or main refrigeration mode running, do not carry out release, only according to other control logics, pressure-relief valve is controlled, comprise oil return control, defrosting control and outdoor heat exchanger volume controlled etc.
The outer machine release control method of the multiple on-line system of the embodiment of the present invention; in multiple on-line system with in pure heating mode or main heating mode running; if the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value; then control pressure-relief valve positive opening and unload die pressing type to make multiple on-line system enter anti-high voltage protective; the high pressure gaseous refrigerant part that now compressor flows out directly flows into low pressure tank by pressure-relief valve; thus the effective release realized system, avoid system generation high voltage protective and occur frequent start-stop.
The multiple on-line system of embodiment of the present invention proposition is described below in conjunction with accompanying drawing.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.As shown in Figure 2, this multiple on-line system comprises: compressor, low pressure tank 101, outdoor heat exchanger and control module (not specifically illustrating in figure).Wherein, the high-pressure exhaust of compressor is connected to the bottom anti-freeze coil pipe of outdoor heat exchanger by pressure-relief valve 113, the heat-exchanging component of outdoor heat exchanger is connected with low pressure tank 101, and low pressure tank 101 is connected to the low pressure gas returning port of compressor.Control module is for obtaining the force value of the high-pressure exhaust of compressor; and judge whether the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value when multiple on-line system is run with main heating mode, and the positive opening of control pressure-relief valve 113 unloads die pressing type to make multiple on-line system enter anti-high voltage protective when the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value.
In one embodiment of the invention, outdoor heat exchanger can comprise left heat exchange unit 110 and right heat exchange unit 111, the bottom of left heat exchange unit 110 and the bottom of right heat exchange unit 111 are provided with anti-freeze coil pipe, wherein, the high-pressure exhaust of compressor is connected respectively to the anti-freeze coil pipe of left heat exchange unit 110 and the anti-freeze coil pipe of right heat exchange unit 111 by pressure-relief valve 113.
Particularly, as shown in Figure 2, multiple on-line system can comprise: multiple compressor is two compressor 102a such as, 102b, compressor 102a and compressor 102b is connected in parallel, be connected with the first end of oil eliminator 106 with capillary 107b and filter 103b by capillary 107a in parallel successively after the low pressure gas returning port of two compressors is connected, and, also be connected with one end of low pressure tank 101 by filter 103a after the low pressure gas returning port of two compressors is connected, the high-pressure exhaust of two compressors is connected respectively by after check valve 104a and check valve 104b, and be connected with the second end of oil eliminator 106.3rd end of oil eliminator 106 is connected with one end of low pressure tank 101 with after filter 103a by screen pack 103c, capillary 107c, magnetic valve 108a successively.Cross valve 105 has first to fourth valve port, and the first valve port is connected with the 4th end of oil eliminator 106, and the second valve port is connected with the general export of part flow arrangement by after check valve 104i and stop valve 109a successively, and the 3rd valve port is connected with the other end of low pressure tank 101.
The inlet ductwork of each heat-exchanging component in left heat exchange unit 110 is formed through shunting by same road pipeline, and be respectively arranged with magnetic valve 108b, magnetic valve 108c and magnetic valve 108d in the inlet ductwork of each heat-exchanging component, the export pipeline of each heat-exchanging component in left heat exchange unit 110 is connected with one end of check valve 104g respectively by after check valve 104d, check valve 104e and check valve 104f.The inlet ductwork of the heat-exchanging component of right heat exchange unit 111 is connected with magnetic valve 108h with the magnetic valve 108g of parallel connection, and the export pipeline of the heat-exchanging component of right heat exchange unit 111 is connected with one end of check valve 104m.After the other end of check valve 104g is connected with the other end of check valve 104m, be connected with the general import of part flow arrangement by stop valve 109b.Be connected with the 4th end of oil eliminator 106 by pressure-relief valve 113 after left heat exchange unit 110 is connected with the bottom anti-freeze coil pipe of right heat exchange unit 111, and between the 4th end and stop valve 109b of oil eliminator 106, be also provided with magnetic valve 108f, and be also provided with check valve 104n between the bottom anti-freeze coil pipe and pressure-relief valve 113 of left heat exchange unit 110.
In addition, one end of check valve 104g is also connected with the 4th valve port of cross valve 105 by check valve 104j, and one end of check valve 104m is connected with the 4th valve port of cross valve 105 by check valve 104k.Check valve 104l is also provided with, between the 4th valve port and distribution pipeline 112 of cross valve 105 and be respectively arranged with check valve 104c and check valve 104h between distribution pipeline 112 and stop valve 109a between second valve port and stop valve 109b of cross valve 105.
Particularly, in multiple on-line system with in pure heating mode or main heating mode running, the force value of the high-pressure exhaust of compressor is detected in real time by pressure sensor 120, when the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value, control pressure-relief valve 113 to open, the high pressure gaseous refrigerant part now flowed out from the high-pressure exhaust of compressor directly flows into the bottom anti-freeze coil pipe of left heat exchange unit 110 and right heat exchange unit 111 by pressure-relief valve 113, due under pure heating mode or main heating mode, 3rd valve port and the 4th valve port of cross valve 105 communicate, therefore the refrigerant flowed out from the bottom anti-freeze coil pipe of left heat exchange unit 110 and right heat exchange unit 111 directly flows into low pressure tank 101 by cross valve 105, thus the release realized system, anti-locking system generation high voltage protective.Wherein, when multiple on-line system is run with pure heating mode or main heating mode, outdoor heat exchanger absorbs heat from environment as evaporimeter.First preset pressure value is less than the high voltage protective threshold value of multiple on-line system.
According to one embodiment of present invention; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the second preset pressure value and continue the first Preset Time; control module then controls multiple on-line system and exits anti-high voltage protective and unload die pressing type; wherein, the second preset pressure value is less than the first preset pressure value.
According to another embodiment of the invention; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the 3rd preset pressure value; control module then controls multiple on-line system and exits anti-high voltage protective and unload die pressing type; wherein, the 3rd preset pressure value is less than the second preset pressure value.
Particularly; after multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of compressor is less than the second preset pressure value and continue the first Preset Time; or the force value of the high-pressure exhaust of compressor is less than the 3rd preset pressure value; then control module control multiple on-line system exits anti-high voltage protective and unloads die pressing type; now control module controls pressure-relief valve 113 according to other control logics, comprises oil return control, defrosting control and outdoor heat exchanger volume controlled etc.
It should be noted that, when multiple on-line system is run with pure refrigeration mode or main refrigeration mode, outdoor heat exchanger is as condenser heat rejection.Now, because the volume of the bottom anti-freeze coil pipe of outdoor heat exchanger is smaller, can not storing excess refrigerant, and the relative aperture of pressure-relief valve 113 is comparatively large, when pressure-relief valve 113 is opened, the refrigerant that meeting bypass is more, and the bottom panel beating of outdoor heat exchanger blocks and the uneven weak heat-dissipating that will cause of air volume adjustment, finally cause total heat dissipation capacity of outdoor heat exchanger to reduce, outlet enthalpy is larger, when evaporating temperature one timing, its refrigerating capacity will reduce.Therefore, in multiple on-line system is with pure refrigeration mode or main refrigeration mode running, does not carry out release, according to other control logics, pressure-relief valve 113 is controlled, comprise oil return control, defrosting control and outdoor heat exchanger volume controlled etc.
The multiple on-line system of the embodiment of the present invention; in multiple on-line system with in pure heating mode or main heating mode running; if the force value of the high-pressure exhaust of compressor is more than or equal to the first preset pressure value; then control pressure-relief valve positive opening and unload die pressing type to make multiple on-line system enter anti-high voltage protective; the high pressure gaseous refrigerant part that now compressor flows out directly flows into low pressure tank by pressure-relief valve; thus the effective release realized system, avoid system generation high voltage protective and occur frequent start-stop.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (9)
1. the outer machine release control method of a multiple on-line system, it is characterized in that, described multiple on-line system comprises compressor, low pressure tank and outdoor heat exchanger, the high-pressure exhaust of described compressor is connected to the bottom anti-freeze coil pipe of described outdoor heat exchanger by pressure-relief valve, the heat-exchanging component of described outdoor heat exchanger is connected with described low pressure tank, described low pressure tank is connected to the low pressure gas returning port of described compressor, and described outer machine release control method comprises the following steps:
Obtain the force value of the high-pressure exhaust of described compressor;
When described multiple on-line system is run with pure heating mode or main heating mode, judge whether the force value of the high-pressure exhaust of described compressor is more than or equal to the first preset pressure value;
If the force value of the high-pressure exhaust of described compressor is more than or equal to described first preset pressure value, then controls described pressure-relief valve positive opening and unload die pressing type to make described multiple on-line system enter anti-high voltage protective.
2. the outer machine release control method of multiple on-line system according to claim 1; it is characterized in that; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the second preset pressure value and continue the first Preset Time; then control described multiple on-line system to exit described anti-high voltage protective and unload die pressing type; wherein, described second preset pressure value is less than described first preset pressure value.
3. the outer machine release control method of multiple on-line system according to claim 2; it is characterized in that; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the 3rd preset pressure value; then control described multiple on-line system to exit described anti-high voltage protective and unload die pressing type; wherein, described 3rd preset pressure value is less than described second preset pressure value.
4. the outer machine release control method of the multiple on-line system according to any one of claim 1-3, it is characterized in that, described first preset pressure value is less than the high voltage protective threshold value of described multiple on-line system.
5. a multiple on-line system, is characterized in that, comprising:
Compressor, low pressure tank and outdoor heat exchanger, the high-pressure exhaust of described compressor is connected to the bottom anti-freeze coil pipe of described outdoor heat exchanger by pressure-relief valve, the heat-exchanging component of described outdoor heat exchanger is connected with described low pressure tank, and described low pressure tank is connected to the low pressure gas returning port of described compressor;
Control module; described control module is for obtaining the force value of the high-pressure exhaust of described compressor; and judge whether the force value of the high-pressure exhaust of described compressor is more than or equal to the first preset pressure value when described multiple on-line system is run with pure heating mode or main heating mode, and control described pressure-relief valve positive opening when the force value of the high-pressure exhaust of described compressor is more than or equal to described first preset pressure value and unload die pressing type to make described multiple on-line system enter anti-high voltage protective.
6. multiple on-line system according to claim 5; it is characterized in that; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the second preset pressure value and continue the first Preset Time; described control module then controls described multiple on-line system and exits described anti-high voltage protective and unload die pressing type; wherein, described second preset pressure value is less than described first preset pressure value.
7. multiple on-line system according to claim 6; it is characterized in that; after described multiple on-line system enters anti-high voltage protective pattern; if the force value of the high-pressure exhaust of described compressor is less than the 3rd preset pressure value; described control module then controls described multiple on-line system and exits described anti-high voltage protective and unload die pressing type; wherein, described 3rd preset pressure value is less than described second preset pressure value.
8. the multiple on-line system according to any one of claim 5-7, is characterized in that, described first preset pressure value is less than the high voltage protective threshold value of described multiple on-line system.
9. multiple on-line system according to claim 5, it is characterized in that, described outdoor heat exchanger comprises left heat exchange unit and right heat exchange unit, the bottom of described left heat exchange unit and the bottom of right heat exchange unit are provided with anti-freeze coil pipe, wherein, the high-pressure exhaust of described compressor is connected respectively to the anti-freeze coil pipe of described left heat exchange unit and the anti-freeze coil pipe of described right heat exchange unit by described pressure-relief valve.
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| CN106765892A (en) * | 2016-11-29 | 2017-05-31 | 广东美的暖通设备有限公司 | Multiple on-line system and its outdoor heat exchanger temperature-sensitive packet inspection method and device |
| CN108844193A (en) * | 2018-06-05 | 2018-11-20 | 珠海格力电器股份有限公司 | Method and device for adjusting unit operation parameters and unit |
| CN110425686A (en) * | 2019-08-09 | 2019-11-08 | 珠海格力电器股份有限公司 | Defrosting control method for air-cooled module unit, computer device and computer readable storage medium |
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