CN115654603A - Multi-split air conditioner and anti-freezing control method and device of hydraulic module of multi-split air conditioner and storage medium - Google Patents

Abstract

The invention discloses a method, a device and a storage medium for controlling anti-freezing of a multi-split air conditioner and a hydraulic module thereof, wherein the hydraulic module comprises a water inlet pipe and a water outlet pipe, the water outlet pipe is provided with an electric heater, and the method comprises the following steps: determining that the hydraulic module is in a standby/shutdown state, and acquiring the ambient temperature and the water inlet temperature of the hydraulic module; determining that the environment temperature is lower than the preset anti-freezing environment temperature and the water inlet temperature is lower than a first preset anti-freezing temperature, and increasing the water inlet quantity of the hydraulic module; after the water inflow of the hydraulic module is increased, the water inflow temperature is determined to be lower than a second preset anti-freezing temperature and lasts for a first preset time, and the external unit heating water or the electric heater of the multi-split air conditioner is controlled to be started, wherein the second preset anti-freezing temperature is higher than the first preset anti-freezing temperature. Therefore, the waterway of the hydraulic module can be prevented from being frozen, and the hydraulic module has the anti-freezing function under the standby and shutdown conditions, so that the reliability of the multi-split air conditioner is ensured, and the service life of the multi-split air conditioner is prolonged.

Description

Multi-split air conditioner and anti-freezing control method and device of hydraulic module of multi-split air conditioner and storage medium

Technical Field

The invention relates to the technical field of heat recovery multi-online machines, in particular to a multi-online machine, and an anti-freezing control method, device and storage medium of a hydraulic module of the multi-online machine.

Background

In the heat recovery multi-split air conditioner, a hydraulic module is a device for exchanging heat between a refrigerant and water, the physical property of the water is that the water can be frozen when the temperature is lower than 0 ℃, and the volume of the frozen water expands to easily cause the bursting of a water pipe, so that on one hand, the machine cannot be normally used, on the other hand, the refrigerant pipeline can be blown out and then enters the water, and finally enters a compressor of the system, and the parts such as the compressor of the system are damaged and cannot be repaired. For example, when the hydraulic module is shut down, the temperature of water is lower than 0 ℃ due to the reduction of air temperature, and at the moment, the water pipe is likely to be frozen and burst, so that the problem of freezing of the water pipe of the hydraulic module needs to be considered in the shut-down state.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide an anti-freezing control method for a hydraulic module of a multi-split air conditioner, wherein when the hydraulic module is in a standby state or a shutdown state, and when an ambient temperature and a water inlet temperature of the hydraulic module satisfy certain conditions, a water inlet amount of the hydraulic module is adjusted, or a mode of controlling an external unit of the multi-split air conditioner to heat water or turning on an electric heater is used to increase a water temperature, so that a water path of the hydraulic module is prevented from being frozen, and the hydraulic module has an anti-freezing function under standby and shutdown conditions, thereby ensuring reliability of the multi-split air conditioner and prolonging a service life of the multi-split air conditioner.

A second object of the invention is to propose a computer-readable storage medium.

The third objective of the present invention is to provide a multi-split air conditioner.

The fourth purpose of the invention is to provide an anti-freezing control device of the multi-online hydraulic module.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides an anti-freezing control method for a multi-split hydraulic module, where the hydraulic module includes a water inlet pipe and a water outlet pipe, and the water outlet pipe is provided with an electric heater, and the method includes: determining that the hydraulic module is in a standby/shutdown state, and acquiring the ambient temperature and the water inlet temperature of the hydraulic module; determining that the environment temperature is lower than the preset anti-freezing environment temperature and the water inlet temperature is lower than the first preset anti-freezing temperature, and increasing the water inlet amount of the hydraulic module; after the water inflow of the hydraulic module is increased, the water inflow temperature is determined to be lower than a second preset anti-freezing temperature and lasts for a first preset time, and the outdoor unit of the multi-split air conditioner is controlled to start hot water production or an electric heater, wherein the second preset anti-freezing temperature is higher than the first preset anti-freezing temperature.

According to the anti-freezing control method of the multi-split hydraulic module, when the hydraulic module is determined to be in a standby/shutdown state, the ambient temperature and the water inlet temperature of the hydraulic module are obtained, when the ambient temperature is determined to be lower than the preset anti-freezing ambient temperature and the water inlet temperature is determined to be lower than the first preset anti-freezing temperature, the water inlet amount of the hydraulic module is increased, after the water inlet amount of the hydraulic module is increased, the water inlet temperature is determined to be lower than the second preset anti-freezing temperature and lasts for the first preset time, and the external unit hot water making or the electric heater of the multi-split unit is controlled to be started. Therefore, when the hydraulic module is in a standby state or a shutdown state, and when the environmental temperature and the water inlet temperature of the hydraulic module meet certain conditions, the water temperature is improved by adjusting the water inlet amount of the hydraulic module or controlling the on-off of the outdoor unit of the multi-split air conditioner or the on-off of the electric heater, the water way of the hydraulic module can be prevented from being frozen, the hydraulic module has the anti-freezing function under the standby and shutdown conditions, the reliability of the multi-split air conditioner is ensured, and the service life of the multi-split air conditioner is prolonged.

According to one embodiment of the invention, the method for controlling the on-state of the external heating water or the electric heater of the multi-split air conditioner comprises the following steps: identifying whether the outdoor unit meets heating operation conditions; recognizing that the outer machine meets the heating operation condition, controlling the outer machine to heat water and turning on an electric heater, and reducing the water inflow of the hydraulic module; and recognizing that the external machine does not meet the heating operation condition, controlling the electric heater to be started, and reducing the water inflow of the hydraulic module.

According to an embodiment of the present invention, when the standby/off state is a heating mode standby/off state, after controlling the external unit of the multi-split air conditioner to heat water or the electric heater to be turned on, the method further includes: determining that the temperature of the inlet water is greater than or equal to a second preset anti-freezing temperature, and controlling the electric heater to be closed; and determining that the water inlet temperature is greater than or equal to the heating anti-freezing exit temperature, and controlling the outdoor unit to shut down, wherein the heating anti-freezing exit temperature is greater than a second preset anti-freezing temperature.

According to an embodiment of the present invention, when the standby/off state is the cooling mode standby/off state, after controlling the external electric water heating or electric heater of the multi-split air conditioner to be turned on, the method further includes: and determining that the inlet water temperature is greater than or equal to the smaller value of the second preset anti-freezing temperature and the refrigeration set outlet water temperature, and controlling the external machine to be turned off and the electric heater to be turned off.

According to an embodiment of the invention, the method further comprises: determining that the hydraulic module is in a heating mode, and acquiring the water inlet temperature and the water outlet temperature of the hydraulic module; and determining that the water temperature is less than or equal to the water inlet temperature and lasts for a second preset time, reducing the water inlet amount of the hydraulic module, and controlling the hydraulic module to carry out shutdown protection if the water outlet temperature is still less than or equal to the water inlet temperature and lasts for the second preset time.

According to an embodiment of the invention, the method further comprises: determining that the hydraulic module is in a refrigeration mode, and acquiring the outlet water temperature of the hydraulic module; and determining that the water temperature is lower than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the down-conversion operation of the outer compressor of the multi-split air conditioner and/or increasing the water inflow of the hydraulic module.

According to an embodiment of the present invention, after controlling the outdoor unit compressor of the multi-split air conditioner to perform down-conversion and/or increasing the water inflow of the hydraulic module, the method further includes: and determining that the temperature of the water is less than zero, or determining that the temperature of the outlet water is less than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the hydraulic module to perform shutdown protection.

To achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium, on which an anti-freeze control program of a multi-online hydraulic module is stored, which when executed by a processor implements the aforementioned anti-freeze control method.

According to the computer-readable storage medium of the embodiment of the invention, through the anti-freezing control method, the waterway of the hydraulic module can be ensured not to be frozen, so that the hydraulic module has an anti-freezing function under the conditions of standby and shutdown, the reliability of the multi-split air conditioner is ensured, and the service life of the multi-split air conditioner is prolonged.

In order to achieve the above object, a third aspect of the present invention provides a multi-split air conditioner, including: the anti-freezing control method comprises a memory, a processor and an anti-freezing control program of the multi-online hydraulic module, wherein the anti-freezing control program is stored in the memory and can run on the processor, and when the processor executes the program, the anti-freezing control method of the multi-online hydraulic module is realized.

According to the multi-split air conditioner, the freeze prevention control method is realized through the processor, the water way of the hydraulic module can be prevented from being frozen, the hydraulic module has the freeze prevention function under the conditions of standby and shutdown, the reliability of the multi-split air conditioner is guaranteed, and the service life of the multi-split air conditioner is prolonged.

In order to achieve the above object, a fourth aspect of the present invention provides an anti-freezing control device for a multi-online hydraulic module, wherein the hydraulic module includes a water inlet pipe and a water outlet pipe, the water outlet pipe is provided with an electric heater, and the device includes: the acquisition module is used for acquiring the ambient temperature and the water inlet temperature of the hydraulic module; and the control module is used for determining that the environment temperature is less than the preset anti-freezing environment temperature and the water inlet temperature is less than the first preset anti-freezing temperature when the hydraulic module is in a standby/power-off state, increasing the water inlet amount of the hydraulic module, determining that the water inlet temperature is less than a second preset anti-freezing temperature and lasts for a first preset time after the water inlet amount of the hydraulic module is increased, and controlling the external unit heating water or the electric heater of the multi-split air conditioner to be started, wherein the second preset anti-freezing temperature is greater than the first preset anti-freezing temperature.

According to the anti-freezing control device of the multi-split hydraulic module, when the hydraulic module is in a standby/shutdown state, the environment temperature and the water inlet temperature of the hydraulic module are obtained, the water inlet quantity of the hydraulic module is increased when the environment temperature is smaller than the preset anti-freezing environment temperature and the water inlet temperature is smaller than the first preset anti-freezing temperature, and after the water inlet quantity of the hydraulic module is increased, the water inlet temperature is smaller than the second preset anti-freezing temperature and lasts for the first preset time, and the outdoor unit heating water or the electric heater of the multi-split unit is controlled to be started. Therefore, when the hydraulic module is in a standby state or a shutdown state, and when the environmental temperature and the water inlet temperature of the hydraulic module meet certain conditions, the water temperature is improved by adjusting the water inlet amount of the hydraulic module or controlling the on-off of the outdoor unit of the multi-split air conditioner or the on-off of the electric heater, the water way of the hydraulic module can be prevented from being frozen, the hydraulic module has the anti-freezing function under the standby and shutdown conditions, the reliability of the multi-split air conditioner is ensured, and the service life of the multi-split air conditioner is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic diagram of a multi-split air conditioner according to an embodiment of the invention;

fig. 2 is a flowchart of an anti-freeze control method of the multi-online hydraulic module according to the first embodiment of the present invention;

3-4 are flow charts of an anti-freezing control method of a multi-online hydraulic module according to a second embodiment of the invention;

fig. 5 is a flowchart of an anti-freezing control method of a multi-online hydro module according to a third embodiment of the present invention;

fig. 6 is a flowchart of an anti-freeze control method of a multi-online hydro module according to a fourth embodiment of the present invention;

fig. 7 is a flowchart of an anti-freeze control method of a multi-online hydro module according to a fifth embodiment of the present invention;

fig. 8 is a flowchart of an anti-freeze control method of a multi-online hydro module according to a sixth embodiment of the present invention;

fig. 9 is a flowchart of an anti-freeze control method of an on-line hydro module according to a seventh embodiment of the present invention;

FIG. 10 is a schematic diagram of a multi-split air conditioner according to an embodiment of the invention;

fig. 11 is a schematic structural diagram of an anti-freezing control device of a multi-split hydraulic module according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

It should be noted that the freeze prevention control method for the multi-split hydraulic module according to the present application may be applied to the multi-split air conditioner shown in fig. 1, and referring to fig. 1, the multi-split air conditioner 100 includes: the system comprises a gas-liquid separator 1, a compressor 2, a heating electromagnetic valve 3, a four-way valve 4, an external unit water side heat exchanger 5, an external unit water pump 6, an external unit electronic expansion valve 7, an exhaust pressure sensor 8, a mode switching device 9, an internal unit 10, a hydraulic module water pump 11, a hydraulic module 12, a water flow regulating valve 121, a water outlet pipe 122, a water inlet pipe 123, an electronic expansion valve 124, a hydraulic module water drain valve 125, a hydraulic module refrigerant-water heat exchanger 126, an electric heater 13 and a one-way valve 14, wherein the electric heater 13 is arranged on the water outlet pipe 122.

Fig. 2 is a flowchart of an anti-freezing control method of a multi-split hydraulic module according to an embodiment of the invention, and referring to fig. 2, the anti-freezing control method may include the following steps:

and S11, determining that the hydraulic module is in a standby/shutdown state, and acquiring the ambient temperature and the water inlet temperature of the hydraulic module.

It should be noted that the ambient temperature Ta may be obtained by arranging an ambient temperature sensor in the multi-split air conditioning system, and the inlet water temperature tw may be obtained by arranging a temperature sensor at the inlet water pipe of the hydro module.

And S12, determining that the environment temperature is lower than the preset anti-freezing environment temperature and the water inlet temperature is lower than the first preset anti-freezing temperature, and increasing the water inlet amount of the hydraulic module. The preset anti-freezing environment temperature and the first preset anti-freezing temperature can be set according to actual conditions.

Specifically, when the ambient temperature Ta is less than the preset anti-freezing ambient temperature T0 and the water inlet temperature Twi is less than the first preset anti-freezing temperature T1, it indicates that the water power module has a risk of low-temperature freezing of the water pipe, at this time, the multi-split air conditioner or the water power module sends a control signal to turn on the water power module water pump, and at the same time, the water flow regulating valve is adjusted to the maximum opening degree to increase the water inlet amount of the water power module, so that the water flow in the water power module flows to reduce the risk of low-temperature freezing of the water pipe.

And S13, after the water inflow of the hydraulic module is increased, determining that the water inflow temperature is lower than a second preset anti-freezing temperature and lasts for a first preset time, and controlling an external unit of the multi-split air conditioner to heat water or an electric heater to be started. The second preset anti-freezing temperature and the first preset time can be set according to actual conditions, and the second preset anti-freezing temperature is greater than the first preset anti-freezing temperature.

Particularly, after water in the water conservancy module flows, because the rivers temperature in outside rivers and the former inlet tube is different, when outside rivers temperature is higher, through mixing outside high temperature rivers with the low temperature rivers in the former inlet tube, can rise the rivers temperature of water conservancy module, get rid of the frozen risk of water pipe low temperature, judge afterwards whether the water conservancy module still has the frozen risk of water pipe low temperature, adopt this kind of mode can play energy-conserving effect. After the water inflow of the hydraulic module is increased, the water inflow temperature Twi is still lower than the second preset anti-freezing temperature T2 and lasts for the first preset time, the risk that the water pipe is frozen at a low temperature still exists in the hydraulic module at the moment, and at the moment, the water flow temperature in the hydraulic module can be increased by starting an external unit of the multi-split air conditioner to heat water or starting an electric heater on a water outlet pipe, so that the risk that the water pipe is frozen at the low temperature is eliminated, and the safety of the water pipe is protected.

In the above embodiment, when the hydraulic module is in a standby state or a shutdown state, the ambient temperature and the water inlet temperature of the hydraulic module are detected, when the temperature reaches a preset condition, the water inlet amount of the hydraulic module is increased and the water inlet temperature is continuously detected, and when the water inlet temperature is continuously lower than a second preset anti-freezing temperature, the water temperature is increased by turning on the electric heater or the external machine to heat water, so that the water path of the hydraulic module is prevented from freezing, the hydraulic module has an anti-freezing function under the standby and shutdown conditions, the reliability of the multi-split air conditioner is ensured, and the service life of the multi-split air conditioner is prolonged.

In some embodiments, referring to fig. 3, the controlling of the on/off of the external hot water heater or the electric heater of the multi-split air conditioner includes:

s131, whether the outer machine meets the heating operation condition is identified.

It should be noted that whether the outdoor unit meets the heating operation condition may be set according to actual needs, for example, it may be set that the outdoor unit needs to enter a heating operation mode according to a user heating requirement, and at this time, the outdoor unit meets the heating operation condition, otherwise, the outdoor unit does not meet the heating operation condition.

And S132, recognizing that the external machine meets the heating operation condition, controlling the external machine to heat water and turning on the electric heater, and reducing the water inflow of the hydraulic module.

And S133, recognizing that the external machine does not meet the heating operation condition, controlling the electric heater to be started, and reducing the water inflow of the hydraulic module.

Specifically, after the water inflow of the hydraulic module is increased, if the hydraulic module still has the risk of low-temperature freezing of the water pipe, the water flow in the hydraulic module needs to be heated, and the faster the heating speed is, the faster the risk is eliminated, so whether the outdoor unit of the multi-split air conditioner meets the heating operation condition can be identified first, when the outdoor unit meets the heating operation condition is identified, the outdoor unit is controlled to produce hot water, the water flow temperature is rapidly increased in a manner of producing hot water by the outdoor unit, and further, the risk of low-temperature freezing of the water pipe is rapidly eliminated, meanwhile, the electric heater can be started, the water flow temperature is increased in a manner of producing hot water by the outdoor unit and heating by the electric heater, and therefore, the risk of low-temperature freezing of the water pipe is eliminated more rapidly; when the fact that the outer machine does not meet the heating operation condition is recognized, the electric heater is controlled to be started, the water flow temperature is improved in a heating mode through the electric heater, and the risk that the water pipe is frozen at a low temperature is rapidly eliminated.

It should be noted that when the external unit is controlled to make hot water or the electric heater is controlled to be turned on, the water inflow of the hydraulic module can be reduced, the water flow rate of the hydraulic module is reduced, and therefore the heating effect is improved.

In the embodiment, when the risk of low-temperature freezing of the water pipe cannot be eliminated after the water inflow of the hydraulic module is increased, the risk of low-temperature freezing of the water pipe can be eliminated by selecting a proper mode based on the heating requirement of the outdoor unit, wherein when the heating requirement is met, the water flow temperature is improved by utilizing the outdoor unit to heat water, the risk of low-temperature freezing of the water pipe can be quickly eliminated, the heating requirement can be met, and when the heating requirement is not met, the risk of low-temperature freezing of the water pipe is eliminated only through the electric heater, so that the problem of poor customer experience caused by the fact that a user does not need to heat water but heats water by adopting the mode of heating the outdoor unit can be avoided; when the water flow temperature is increased, the water inflow of the hydraulic module is reduced to improve the heating effect, the water temperature is increased at the fastest heating speed under the current condition, the risk of low-temperature freezing of a water pipe of the hydraulic module is eliminated, and the safety of the hydraulic module is protected.

In some embodiments, referring to fig. 4, when the standby/off state is a heating mode standby/off state, after controlling the external unit of the multi-split air conditioner to heat water or the electric heater to be turned on, the method further includes:

and S134, determining that the water inlet temperature is greater than or equal to a second preset anti-freezing temperature, and controlling the electric heater to be turned off.

And S135, determining that the water inlet temperature is greater than or equal to the heating anti-freezing exit temperature, and controlling the external unit to shut down. The heating anti-freezing exit temperature can be set according to actual conditions, and is greater than the second preset anti-freezing temperature.

Specifically, after only controlling the electric heater to be turned on, the water inlet temperature Twi of the hydraulic module gradually rises, and when the water inlet temperature Twi is greater than or equal to the second preset anti-freezing temperature T2, it indicates that the risk of low-temperature freezing of the water pipe of the hydraulic module is eliminated, and at this time, the electric heater can be controlled to be turned off. At this time, the outdoor unit is not controlled to produce hot water, so that the anti-freezing control flow of the hydraulic module can be finished, and the hydraulic module can continuously keep a standby state or a stop state.

After the external unit is controlled to heat water and the electric heater is started, the water inlet temperature Twi of the hydraulic module gradually rises, when the water inlet temperature Twi is larger than or equal to the second preset anti-freezing temperature T2, the risk that the water pipe of the hydraulic module freezes at a low temperature is eliminated, and the electric heater can be controlled to be turned off. After the electric heater is turned off, the outdoor unit is still in a hot water making state, the water inlet temperature Twi of the hydraulic module still continues to rise, and since the outdoor unit is turned on for heating and the hydraulic module is actually in a heating operation state, when the water inlet temperature Twi is determined to be greater than the heating anti-freezing exit temperature T3, the outdoor unit is controlled to be turned off to stop making hot water, so that the hydraulic module is ensured to have a proper temperature for heating operation, at the moment, the anti-freezing control flow of the hydraulic module is finished, and the hydraulic module can return to a standby state or maintain a heating operation mode according to requirements.

Therefore, after the outdoor unit is controlled to heat water or the electric heater is controlled to be started, the electric heater and the outdoor unit are turned off in a grading manner according to the fact that whether the water inlet temperature rises to the second preset anti-freezing temperature and the heating anti-freezing exit temperature, the anti-freezing protection function of the hydraulic module is achieved, the hydraulic module can conveniently enter a heating mode quickly, and convenience of the hydraulic module is improved.

In other embodiments, when the standby/shutdown state is a cooling mode standby/shutdown state, after controlling the external unit of the multi-split air conditioner to heat water or the electric heater to be turned on, the method further includes: and determining that the inlet water temperature is greater than or equal to the smaller value of the second preset anti-freezing temperature and the refrigeration set outlet water temperature, and controlling the external machine to be turned off and the electric heater to be turned off.

Specifically, after the outdoor unit is controlled to heat water and the electric heater is controlled to be turned on, the water inlet temperature Twi of the hydraulic module gradually rises, the hydraulic module runs in a standby/shutdown state in a refrigeration mode at the moment, and the water outlet temperature Two of the hydraulic module during running in the refrigeration mode changes according to the setting and may be lower than a second preset anti-freezing temperature T2, so that when the water inlet temperature Twi is determined to be larger than or equal to the second preset anti-freezing temperature T2 and the refrigerating set water outlet temperature TS is determined to be smaller, the outdoor unit is controlled to be turned off and the electric heater is controlled to be turned off, the water temperature requirement in the refrigeration mode of the hydraulic module can be met, and the anti-freezing protection function of the hydraulic module is achieved. If the external unit is not turned on to heat water, only the electric heater is turned off.

In some embodiments, referring to fig. 5, the method for controlling freeze prevention of a multi-split hydro module further includes:

and S21, determining that the hydraulic module is in a heating mode, and acquiring the water inlet temperature and the water outlet temperature of the hydraulic module.

It should be noted that, the heating mode of the hydraulic module includes not only a conventional heating mode, but also a situation that the external unit is turned on to heat water based on the anti-freezing requirement of the hydraulic module, when it is determined that the hydraulic module is in the heating mode, except for a short time when heating starts or a special situation that the heating effect is not obvious due to a large water inflow amount of the hydraulic module, the water outflow temperature Two of the hydraulic module should be higher than the water inflow temperature Two, so that the water inflow temperature Two and the water outflow temperature Two of the hydraulic module can be obtained, and whether the heating function of the hydraulic module is normal or not is determined according to the water inflow temperature Two and the water outflow temperature Two.

And S22, determining that the water temperature is less than or equal to the water inlet temperature and lasts for a second preset time, reducing the water inlet amount of the hydraulic module, and controlling the hydraulic module to carry out shutdown protection if the water outlet temperature is still less than or equal to the water inlet temperature and lasts for the second preset time. The second preset time can be set according to actual conditions.

Specifically, in the heating mode of the hydraulic module, when the water outlet temperature Two is less than or equal to the water inlet temperature Twi and lasts for a second preset time, it indicates that the water inlet and outlet temperatures are abnormal, the heating function may be abnormal, at this time, the water inlet amount of the hydraulic module may be reduced, so that the heating effect of the hydraulic module is more obvious, the water inlet temperature Twi and the water outlet temperature Two are continuously compared, and if the water outlet temperature Two is still less than or equal to the water inlet temperature Twi and lasts for the second preset time, it indicates that the heating function of the hydraulic module is failed and the risk of low-temperature freezing of the water pipe may occur, for example, the hydraulic module may change the water heating function into the water cooling function due to a wiring error or a pipe connection error, so that the water pipe of the hydraulic module is required to be controlled to perform shutdown protection, thereby preventing the water pipe of the hydraulic module from being frozen at a low temperature and protecting the safety of the hydraulic module. Meanwhile, protection information can be reported through the hydraulic module, for example, the protection information of Two less than or equal to Twi is reported to confirm the shutdown protection type and reason, so that the subsequent processing is convenient.

Therefore, the anti-freezing protection function of the hydraulic module in the heating mode is realized, and the water way of the hydraulic module in the heating mode is prevented from being frozen, so that the safety of the hydraulic module is protected.

In some embodiments, referring to fig. 6, the method for controlling freeze prevention of the multi-online hydraulics module further includes:

and S31, determining that the hydraulic module is in a refrigeration mode, and acquiring the outlet water temperature of the hydraulic module.

And S32, determining that the water temperature is lower than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the down-conversion operation of the outdoor unit compressor of the multi-split air conditioner and/or increasing the water inflow of the hydraulic module. The third preset time can be set according to actual conditions.

Specifically, when the hydraulic module is in a refrigeration mode, the water outlet temperature twos of the hydraulic module is lower than the water inlet temperature twos, so when the water inlet temperature twos is close to 0 ℃, and the water flow is small or the refrigeration capacity is large, the water outlet temperature twos is likely to be lower than 0 ℃, so that ice crystals are gradually generated until the water pipe is frozen to generate frost crack, and therefore whether the risk of low-temperature freezing of the water pipe exists in the hydraulic module can be judged according to the water outlet temperature twos by acquiring the water outlet temperature twos.

When the water outlet temperature Two is lower than the first preset anti-freezing temperature T1 and lasts for a third preset time, the problem that the water outlet temperature Two is too low at the moment and a water pipe is prone to frost cracking is shown, at the moment, the compressor of the outer machine is controlled to run in a frequency reduction mode, the water inlet quantity of the hydraulic module is increased, the refrigerating capacity of the hydraulic module is weakened, the water temperature of the hydraulic module is increased, the water pipe is prevented from being frozen at a low temperature, and therefore the safety of the hydraulic module is protected. It should be noted that, the operation of the compressor in the frequency reduction mode and the increase of the water inflow of the hydraulic module can weaken the refrigeration capacity of the hydraulic module and increase the water temperature of the hydraulic module, so that one or two of the modes can be selected as a mode for increasing the water temperature of the hydraulic module, and the method is not limited herein.

Further, in some embodiments, after controlling the outdoor unit compressor of the multi-split air conditioner to perform down-conversion and/or adjusting the water inlet amount of the hydraulic module, the method further comprises: and determining that the temperature of the water is less than zero, or determining that the temperature of the outlet water is less than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the hydraulic module to perform shutdown protection.

Specifically, after the compressor of the external unit is controlled to perform frequency reduction operation and the water inflow of the hydraulic module is increased, if the water outlet temperature twos is still lower than zero, or the water outlet temperature twos is lower than the first preset anti-freezing temperature T1 and lasts for a third preset time, it indicates that the low-temperature freezing risk of the water pipe of the hydraulic module is not eliminated, and the hydraulic module is controlled to perform shutdown protection at this time, so that the water pipe of the hydraulic module is prevented from being frozen at a low temperature, the safety of the hydraulic module is protected, and meanwhile, protection information can be reported through the hydraulic module, for example, "Two anti-freezing protection" information can be reported, so as to confirm the type and reason of shutdown protection, and facilitate subsequent processing.

Therefore, the protection function of the hydraulic module in the refrigeration mode is realized, and the water way of the hydraulic module in the refrigeration mode is ensured not to be frozen, so that the safety of the hydraulic module is protected.

As a specific embodiment, referring to fig. 7, when the hydro module is in a heating mode standby/off state, the anti-freeze control method includes:

s401, the hydraulic module is in a heating mode standby/shutdown state.

S402, judging whether Ta < T0 and Twi < T1, if yes, executing S403, otherwise, returning to S402.

And S403, performing heating and antifreezing control on the hydraulic module.

And S404, opening the water power module water pump, and opening the water flow regulating valve to the maximum opening degree.

S405, judging whether Twi is less than T2 and lasting for a first preset time (such as 1 min) or not, if yes, executing S406, and if not, returning to S402.

S406, determining whether the external unit heating and booting condition is satisfied, if yes, performing S410, otherwise, performing S407.

And S407, opening the water flow regulating valve to the initial opening degree, and opening the electric heater.

S408, judging whether Twi is more than or equal to T2, if yes, executing S409, otherwise, returning to S408.

And S409, turning off the electric heater.

And S410, starting the external machine, opening the water flow regulating valve to the initial opening degree, and starting the electric heater.

S411, judging whether Two is more than Twi and the duration is the second preset time (such as 3 min), if yes, executing S412, otherwise, executing S417.

S412, judging whether Twi is larger than T2, if yes, executing S413, otherwise returning to S411.

And S413, turning off the electric heater.

S414, judging whether Twi is more than or equal to T3, if yes, executing S415, otherwise, returning to S413.

S415, the external unit is turned off.

And S416, exiting the heating and anti-freezing control of the hydraulic module.

And S417, opening the water flow regulating valve to the minimum opening degree.

S418, determining whether Two is greater than Twi and the second preset time is satisfied, if yes, executing S412, otherwise executing S419.

S419, the hydraulic module executes shutdown protection and reports 'Two is less than or equal to Twi protection'.

Referring to fig. 8, when the hydro module is in a cooling mode standby/off state, the freezing prevention control method includes:

and S501, the hydraulic module is in a cooling mode standby/shutdown state.

S502, judging whether Ta is less than T0 and Twi is less than T1, if yes, executing S503, otherwise, returning to S502.

And S503, entering the hydraulic module for refrigeration and anti-freezing control.

And S504, opening the water pump of the hydraulic module, and opening the water flow regulating valve to the maximum opening degree.

S505, determining whether Twi is less than T2 and the first preset time is satisfied, if yes, executing S506, otherwise, returning to S502.

S506, determining whether the outdoor unit heating and booting condition is satisfied, if yes, executing S508, otherwise executing S507.

And S507, opening the water flow regulating valve to an initial opening degree, and opening the electric heater.

And S508, starting the external machine, opening the water flow regulating valve to the initial opening degree, and opening the electric heater.

S509, whether Two is greater than Twi and the duration of the second preset time is true is judged, if yes, S510 is executed, and if not, S513 is executed.

S510, judging whether Twi is larger than or equal to min (T2, ts) or not, if yes, executing S511, and if not, returning to S509.

And S511, closing the electric heater and shutting down the external machine. If only the electric heater is turned on, only the electric heater may be turned off.

And S512, exiting the refrigeration and anti-freezing control of the hydraulic module.

And S513, opening the water flow regulating valve to the minimum opening degree.

S514, judging whether Two is more than Twi and the duration of the second preset time is true, if yes, executing S510, and if not, executing S515.

S515, the hydraulic module executes shutdown protection and reports that the Two is less than or equal to the Twi protection.

Referring to FIG. 9, when the hydro module is in the cooling mode, the freeze control method includes:

and S601, operating the hydraulic module in a refrigeration mode.

S602, judging whether Two is less than T1 and lasts for a third preset time (such as 3 min), if yes, executing S603, and if not, returning to S602.

S603, the frequency of the compressor is reduced by 5Hz, and the opening of the water flow regulating valve is increased by 100p.

S604, whether Two is less than T1 for a third preset time or whether Two is less than or equal to 0 is judged, if yes, S605 is executed, and if not, S602 is returned to.

S605, "Two freeze protection" shutdown.

It should be noted that, in the above example, the water flow rate of the hydraulic module is adjusted by the hydraulic module water pump and the water flow rate adjusting valve, and if a variable frequency water pump is arranged inside the hydraulic module, the water flow rate can also be adjusted by the variable frequency water pump, which is not limited herein.

In summary, according to the anti-freezing control method for the multi-split hydraulic module in the embodiment of the present invention, based on the ambient temperature, the water inlet temperature, the water outlet temperature, and the like, the water inlet amount of the hydraulic module is adjusted, or the external unit hot water making or electric heater is controlled to be turned on, so as to increase the temperature of the water flow, and it can be ensured that the water circuit is not frozen in various situations such as the operation of the hot water making, the operation of the cold water, the standby state, or the shutdown state of the hydraulic module, so as to greatly improve the reliability of the multi-split air-conditioning system, and prolong the service life of the multi-split air-conditioning system.

In correspondence with the above-described embodiments, an embodiment of the present invention further provides a computer-readable storage medium on which an anti-freeze control program of the multi-online hydro module is stored, which when executed by a processor implements the above-described anti-freeze control method.

According to the computer-readable storage medium of the embodiment of the invention, by the anti-freezing control method, based on the environment temperature, the water inlet temperature, the water outlet temperature and the like, the water inlet amount of the hydraulic module is adjusted, or the external heating water or the electric heater is controlled to be turned on, so as to increase the temperature of the water flow, and the water circuit of the hydraulic module can be ensured not to be frozen under various conditions such as the heating water operation, the cooling water operation, the standby or shutdown, so that the reliability of the multi-split air-conditioning system is greatly improved, the service life of the multi-split air-conditioning system is prolonged, and the method is stable, reliable and universal, and can be used for air source multi-split air-conditioning systems or other similar system types.

Corresponding to the above embodiments, the embodiments of the present invention further provide a multi-split air conditioner.

Fig. 10 is a block diagram of a multi-split air conditioner according to an embodiment of the invention, and referring to fig. 10, the multi-split air conditioner 200 includes: the controller comprises a memory 210, a processor 220 and an anti-freezing control program of the multi-online hydraulic module, wherein the anti-freezing control program is stored in the memory 210 and can run on the processor 220, and when the processor 220 executes the program, the anti-freezing control method of the multi-online hydraulic module is realized.

According to the multi-split air-conditioning system, the anti-freezing control method is realized through the processor, the water inflow of the hydraulic module is adjusted or the external heating water or the electric heater is controlled to be started based on the environment temperature, the water inlet temperature, the water outlet temperature and the like so as to improve the temperature of water flow, and the water circuit can be prevented from being frozen under various conditions such as heating water operation, cooling water operation, standby or shutdown of the hydraulic module, so that the reliability of the multi-split air-conditioning system is greatly improved, the service life of the multi-split air-conditioning system is prolonged, and the method is stable, reliable and universal, and can be used for air source multi-split air-conditioning systems or other similar system types.

Corresponding to the above embodiment, the embodiment of the invention also provides an anti-freezing control device for the multi-online hydraulic module.

Fig. 11 illustrates an anti-freezing control device of a multi-split hydraulic module according to an embodiment of the present invention. As shown in fig. 1, the hydraulic module 12 includes a water inlet pipe 122 and a water outlet pipe 123, and the water outlet pipe 123 is provided with an electric heater 13.

As shown in fig. 11, the freezing prevention control device 300 includes: an acquisition module 310 and a control module 320. The obtaining module 310 is configured to obtain an ambient temperature and an inlet water temperature of the hydraulic module 12; the control module 320 is configured to, when the hydraulic module 12 is in the standby/shutdown state, determine that the ambient temperature is less than the preset anti-freezing ambient temperature and the water inlet temperature is less than the first preset anti-freezing temperature, increase the water inlet amount of the hydraulic module 12, and after the water inlet amount of the hydraulic module 12 is increased, determine that the water inlet temperature is less than a second preset anti-freezing temperature and lasts for a first preset time, and control the external unit of the multi-split air conditioner 100 to heat water or turn on the electric heater 13, where the second preset anti-freezing temperature is greater than the first preset anti-freezing temperature.

According to an embodiment of the invention, the control module 320 is further configured to: identifying whether the outdoor unit meets heating operation conditions; recognizing that the outer machine meets the heating operation condition, controlling the outer machine to heat water and turning on an electric heater, and reducing the water inflow of the hydraulic module; and recognizing that the external machine does not meet the heating operation condition, controlling the electric heater to be started, and reducing the water inflow of the hydraulic module.

According to an embodiment of the present invention, when the standby/off state is the heating mode standby/off state, after controlling the external unit of the multi-split air conditioner to heat water or turn on the electric heater, the control module 320 is further configured to: determining that the temperature of the inlet water is greater than or equal to a second preset anti-freezing temperature, and controlling the electric heater to be closed; and determining that the water inlet temperature is greater than or equal to the heating anti-freezing exit temperature, and controlling the outdoor unit to shut down, wherein the heating anti-freezing exit temperature is greater than a second preset anti-freezing temperature.

According to an embodiment of the present invention, when the standby/off state is the cooling mode standby/off state, after controlling the external electric water heater or the electric heater of the multi-split air conditioner to be turned on, the control module 320 is further configured to: and determining that the inlet water temperature is greater than or equal to the smaller value of the second preset anti-freezing temperature and the refrigeration set outlet water temperature, and controlling the shutdown of the outdoor unit and the shutdown of the electric heater.

According to an embodiment of the invention, the control module 320 is further configured to: determining that the hydraulic module is in a heating mode, and acquiring the water inlet temperature and the water outlet temperature of the hydraulic module; and determining that the water temperature is less than or equal to the water inlet temperature and lasts for a second preset time, reducing the water inlet amount of the hydraulic module, and controlling the hydraulic module to carry out shutdown protection if the water outlet temperature is less than or equal to the water inlet temperature and lasts for the second preset time.

According to an embodiment of the invention, the control module 320 is further configured to: determining that the hydraulic module is in a refrigeration mode, and acquiring the outlet water temperature of the hydraulic module; and determining that the water temperature is lower than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the down-conversion operation of the outer compressor of the multi-split air conditioner and/or increasing the water inflow of the hydraulic module.

According to an embodiment of the present invention, after controlling the outdoor unit compressor of the multi-split air conditioner to perform down-conversion and/or increasing the water inflow of the hydraulic module, the control module 320 is further configured to: and determining that the water temperature is less than zero, or determining that the outlet water temperature is less than the first preset anti-freezing temperature and lasts for a third preset time, and controlling the hydraulic module to carry out shutdown protection.

It should be noted that, regarding the description of the anti-freezing control device for the multi-split hydraulic module in the present application, please refer to the related description of the anti-freezing control method for the multi-split hydraulic module in the present application, and details are not repeated herein.

According to the anti-freezing control device of the multi-split hydraulic module, the water inflow of the hydraulic module is adjusted or the external machine heating water or the electric heater is controlled to be started based on the environment temperature, the water inflow temperature, the water outflow temperature and the like, so that the temperature of water flow is increased, the water circuit of the hydraulic module can be prevented from being frozen under various conditions such as heating water operation, cooling water operation, standby or stop, and the like, the reliability of the multi-split air conditioner is greatly improved, the service life of the multi-split air conditioner is prolonged, and the method is stable, reliable and universal, and can be used for air source multi-split air conditioners or other similar system types.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The anti-freezing control method of the multi-online hydraulic module is characterized in that the hydraulic module comprises a water inlet pipe and a water outlet pipe, an electric heater is arranged on the water outlet pipe, and the method comprises the following steps:

determining that the hydraulic module is in a standby/shutdown state, and acquiring the ambient temperature and the water inlet temperature of the hydraulic module;

determining that the environment temperature is lower than a preset anti-freezing environment temperature and the water inlet temperature is lower than a first preset anti-freezing temperature, and increasing the water inlet quantity of the hydraulic module;

after the water inflow of the hydraulic module is increased, the water inflow temperature is determined to be lower than a second preset anti-freezing temperature and lasts for a first preset time, and the external heating water of the multi-split air conditioner or the electric heater is controlled to be started, wherein the second preset anti-freezing temperature is higher than the first preset anti-freezing temperature.

2. The method of claim 1, wherein the controlling the external electric heating water of the multi-split air conditioner or the electric heater to be turned on comprises:

identifying whether the outdoor unit meets heating operation conditions;

recognizing that the outdoor unit meets the heating operation condition, controlling the outdoor unit to heat water and the electric heater to be started, and reducing the water inflow of the hydraulic module;

and recognizing that the external machine does not meet the heating operation condition, controlling the electric heater to be started, and reducing the water inflow of the hydraulic module.

3. The method of claim 2, wherein when the standby/off state is a heating mode standby/off state, after controlling the external unit of the multi-split air conditioner to heat water or the electric heater to be turned on, the method further comprises:

determining that the temperature of the inlet water is greater than or equal to the second preset anti-freezing temperature, and controlling the electric heater to be turned off;

and determining that the water inlet temperature is more than or equal to the heating anti-freezing exit temperature, and controlling the outdoor unit to be powered off, wherein the heating anti-freezing exit temperature is more than the second preset anti-freezing temperature.

4. The method of claim 2, wherein when the standby/off state is a cooling mode standby/off state, after controlling an external heating water of the multi-split air conditioner or the electric heater to be turned on, the method further comprises:

and determining that the water inlet temperature is more than or equal to the smaller value of the second preset anti-freezing temperature and the refrigeration set water outlet temperature, and controlling the external machine to be shut down and the electric heater to be shut down.

5. The method according to any one of claims 1-4, further comprising:

determining that the hydraulic module is in a heating mode, and acquiring the water inlet temperature and the water outlet temperature of the hydraulic module;

and determining that the water outlet temperature is less than or equal to the water inlet temperature and lasts for a second preset time, reducing the water inflow of the hydraulic module, and if the water outlet temperature is still less than or equal to the water inlet temperature and lasts for the second preset time, controlling the hydraulic module to carry out shutdown protection.

6. The method of claim 1, further comprising:

determining that the hydraulic module is in a refrigeration mode, and acquiring the outlet water temperature of the hydraulic module;

and determining that the outlet water temperature is lower than the first preset anti-freezing temperature and lasts for a third preset time, and controlling an outer machine compressor of the multi-split air conditioner to perform frequency reduction operation and/or increasing the water inflow of the hydraulic module.

7. The method of claim 6, wherein after controlling the outdoor compressor of the multi-split air conditioning unit to run down and/or turn up the water module's water intake, the method further comprises:

and determining that the outlet water temperature is less than zero, or determining that the outlet water temperature is less than the first preset anti-freezing temperature and lasts for the third preset time, and controlling the hydraulic module to perform shutdown protection.

8. A computer-readable storage medium, characterized in that it has stored thereon an anti-freeze control program of a multi-online hydraulics module, which when executed by a processor, implements the anti-freeze control method according to any of claims 1-7.

9. A multiple on-line machine, comprising: a memory, a processor and an anti-freeze control program of a multi-online hydraulic module stored on the memory and operable on the processor, the processor implementing the anti-freeze control method of the multi-online hydraulic module according to any one of claims 1 to 7 when executing the program.

10. The utility model provides a many online hydraulic module's freeze-proof controlling means which characterized in that, hydraulic module include inlet tube and outlet pipe, be equipped with electric heater on the outlet pipe, the device includes:

the acquisition module is used for acquiring the ambient temperature and the water inlet temperature of the hydraulic module;

and the control module is used for determining that the environment temperature is less than a preset anti-freezing environment temperature and the water inlet temperature is less than a first preset anti-freezing temperature when the hydraulic module is in a standby/power-off state, increasing the water inlet quantity of the hydraulic module, determining that the water inlet temperature is less than a second preset anti-freezing temperature and lasts for a first preset time after the water inlet quantity of the hydraulic module is increased, and controlling an external unit of the multi-split air conditioner to heat water or the electric heater to be started, wherein the second preset anti-freezing temperature is greater than the first preset anti-freezing temperature.

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