A refrigerator and its control method

Abstract

The present invention relates to a refrigerator and a control method thereof. The refrigerator includes: a box body; an ice maker; a water injection pipe, the water inlet and the water outlet of the water injection pipe are respectively connected to a water source and the ice maker; a heating device disposed outside the water outlet of the water injection pipe; a flow rate detection device for detecting the water flow rate at the water outlet and outputting a flow rate signal; a water pressure detection device for detecting the water pressure at the water inlet and outputting a water pressure signal; a controller configured to: receive the water pressure signal and the flow rate signal; when it is determined that the heating condition of the water injection pipe is satisfied, determine the current ice formation area at the water outlet of the water injection pipe according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and a pre-configured first mapping relationship; determine the current defrosting time according to the current ice formation area and a pre-configured second mapping relationship; and control the heating device to heat according to the current defrosting time. By adopting the present invention, the water outlet of the water injection pipe can be heated as required, thereby reducing energy consumption and the time required for ice making.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a refrigerator and a control method thereof. Background Art

[0002] With the improvement of living standards, people's demand for ice makers has gradually increased. Ice makers are generally installed in the freezer of a refrigerator. The temperature in the freezer is relatively low, and the water in the water pipe is generally at room temperature. At the outlet of the water inlet pipe, icing often occurs due to the convergence of cold and hot air here, which affects the ice-making effect. The existing solution is to wrap an aluminum foil heating wire around the water inlet pipe and control the heating wire to remain on during the period from when the user starts making ice until the ice storage box is full and the user stops making ice. The inventor of the present invention found that in the existing refrigerator, even if the water inlet pipe is not frozen, the heating wire is still on, which not only consumes unnecessary energy to maintain the operation of the heating wire, but also increases the water temperature entering the ice maker, resulting in an extended ice-making time. Summary of the Invention

[0003] Embodiments of the present invention provide a refrigerator and a control method thereof, which can heat the outlet of the water injection pipe as needed, thereby reducing energy consumption and ice-making time.

[0004] An embodiment of the present invention provides a refrigerator, including:

[0005] A box body with a compartment inside;

[0006] An ice maker provided in the compartment;

[0007] A water injection pipe, the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to the ice maker;

[0008] A heating device provided outside the water outlet of the water injection pipe;

[0009] A flow rate detection device for detecting the water flow rate at the water outlet of the water injection pipe and outputting a flow rate signal;

[0010] A water pressure detection device for detecting the water pressure at the water inlet of the water injection pipe and outputting a water pressure signal;

[0011] A controller configured to:

[0012] Receive the water pressure signal and the flow rate signal;

[0013] When it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and a first mapping relationship between the value of the water pressure signal, the value of the flow rate signal and the icing area at the water outlet of the water injection pipe configured in advance, determine the current icing area at the water outlet of the water injection pipe;

[0014] Determine the current defrosting time according to the current icing area and a pre-configured second mapping relationship between the icing area and the defrosting time.

[0015] Control the heating device to heat according to the current defrosting time.

[0016] As an improvement to the above solution, the controller is further configured to:

[0017] During the process of controlling the heating device to heat, determine the value of the flow signal corresponding to the icing area of 0 at the water outlet of the water injection pipe according to the value of the water pressure signal output by the water pressure detection device and the first mapping relationship, so as to use it as the current flow threshold.

[0018] When it is detected that the value of the flow signal output by the flow detection device reaches the current flow threshold, control the heating device to stop heating.

[0019] As an improvement to the above solution, when it is determined that the heating condition of the water injection pipe is satisfied, determining the current icing area at the water outlet of the water injection pipe according to the value of the water pressure signal, the value of the flow signal, and a pre-configured first mapping relationship between the value of the water pressure signal, the value of the flow signal and the icing area of the water outlet of the water injection pipe includes:

[0020] When it is determined that the heating condition of the water injection pipe is satisfied, obtain the value of the water pressure signal and the value of the flow signal.

[0021] Determine the value range of the flow signal according to the value of the flow signal and a preset error threshold; wherein, the starting value of the value range is the difference between the value of the flow signal and the preset error threshold, and the ending value of the value range is the sum of the value of the flow signal and the preset error threshold.

[0022] In the first mapping relationship between the pre-configured value of the water pressure signal, the value of the flow signal and the icing area of the water outlet of the water injection pipe, find the corresponding icing area when the value of the water pressure signal is the value of the water pressure signal corresponding to it and the value of the flow signal is within the value range, so as to use it as the current icing area.

[0023] As an improvement to the above solution, the heating condition of the water injection pipe is:

[0024] Receive a water injection start signal for instructing the water injection pipe to start injecting water; or,

[0025] The value of the flow signal output by the flow detection device is not 0.

[0026] As an improvement of the above solution, the flow detection device is a pulsed flowmeter; the flow signal is a pulsed signal; and the value corresponding to the flow signal is the number of pulses.

[0027] Correspondingly, another embodiment of the present invention provides a control method for a refrigerator, including:

[0028] Receiving a water pressure signal output by a water pressure detection device and a flow signal output by a flow detection device; wherein, the water pressure detection device is used to detect the water pressure at the water inlet of a water injection pipe connected to the refrigerator; the flow detection device is used to detect the water flow rate at the water outlet of the water injection pipe; the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to an ice maker provided inside the refrigerator;

[0029] When it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow signal, and a first mapping relationship between the pre-configured water pressure signal value, the flow signal value, and the ice formation area at the water outlet of the water injection pipe, determining the current ice formation area at the water outlet of the water injection pipe;

[0030] According to the current ice formation area and a second mapping relationship between the ice formation area and the defrosting time pre-configured, determining the current defrosting time;

[0031] Controlling a heating device to heat according to the current defrosting time; wherein, the heating device is provided outside the water outlet of the water injection pipe.

[0032] As an improvement of the above solution, the method further includes:

[0033] During the process of controlling the heating device to heat, according to the value corresponding to the water pressure signal output by the water pressure detection device and the first mapping relationship, determining the value of the flow signal corresponding to when the ice formation area at the water outlet of the water injection pipe is 0, so as to be used as the current flow threshold;

[0034] When it is detected that the value corresponding to the flow signal output by the flow detection device reaches the current flow threshold, controlling the heating device to stop heating.

[0035] As an improvement of the above solution, the step of, when it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow signal, and a first mapping relationship between the pre-configured water pressure signal value, the flow signal value, and the ice formation area at the water outlet of the water injection pipe, determining the current ice formation area at the water outlet of the water injection pipe includes:

[0036] When it is determined that the heating condition of the water injection pipe is satisfied, obtaining the value corresponding to the water pressure signal and the value corresponding to the flow signal;

[0037] Determine the numerical range corresponding to the flow signal according to the value corresponding to the flow signal and the preset error threshold; wherein, the starting value of the numerical range is the difference between the value corresponding to the flow signal and the preset error threshold, and the ending value of the numerical range is the sum of the value corresponding to the flow signal and the preset error threshold;

[0038] In the first mapping relationship among the preconfigured water pressure signal value, flow signal value, and the ice formation area at the water outlet of the water injection pipe, search for the ice formation area corresponding to the water pressure signal value being the value corresponding to the water pressure signal and the flow signal value being within the numerical range as the current ice formation area.

[0039] As an improvement to the above solution, the water injection pipe heating condition is:

[0040] Receiving a water injection start signal for instructing the water injection pipe to start water injection; or,

[0041] The value corresponding to the flow signal output by the flow detection device is not 0.

[0042] As an improvement to the above solution, the flow detection device is a pulse flowmeter; the flow signal is a pulse signal; the value corresponding to the flow signal is the number of pulses.

[0043] Compared with the prior art, the refrigerator and its control method provided in this embodiment have the following beneficial effects:

[0044] When it is determined that the water injection pipe heating condition is satisfied, according to the value corresponding to the water pressure signal output by the water pressure detection device at the water inlet of the water injection pipe, the flow signal output by the flow detection device at the water outlet of the water injection pipe, and the first mapping relationship among the preconfigured water pressure signal value, flow signal value, and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe. Then, according to the current ice formation area and the second mapping relationship between the ice formation area and the defrosting time preconfigured, determine the current defrosting time. Then, according to the current defrosting time, control the heating device arranged outside the water outlet of the water injection pipe to heat. Thus, it is possible to accurately control the opening time of the heating wire according to the size of the ice formation area at the water outlet of the water injection pipe, realizing on-demand heating of the water outlet of the water injection pipe, thereby reducing energy consumption and the time required for ice making. Description of the Drawings

[0045] Figure 1 It is a schematic diagram of the circuit structure inside a refrigerator provided by an embodiment of the present invention;

[0046] Figure 2 It is a working flowchart of a controller in a refrigerator provided by an embodiment of the present invention;

[0047] Figure 3 It is a schematic flow chart of a control method for a refrigerator provided by an embodiment of the present invention. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] See Figure 1 and Figure 2 , this embodiment provides a refrigerator 10, including:

[0050] A box body with compartments inside;

[0051] An ice maker 1 provided in the compartment;

[0052] A water injection pipe, the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to the ice maker 1;

[0053] A heating device 2 provided outside the water outlet of the water injection pipe;

[0054] A flow rate detection device 3 for detecting the water flow rate at the water outlet of the water injection pipe and outputting a flow rate signal;

[0055] A water pressure detection device 4 for detecting the water pressure at the water inlet of the water injection pipe and outputting a water pressure signal;

[0056] A controller 5 configured to:

[0057] S11. Receive the water pressure signal and the flow rate signal;

[0058] S12. When it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and the first mapping relationship between the pre-configured water pressure signal value, flow rate signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe;

[0059] S13. According to the current ice formation area and the second mapping relationship between the ice formation area and the defrosting time pre-configured, determine the current defrosting time;

[0060] S14. Control the heating device 2 to heat according to the current defrosting time.

[0061] It should be noted that when the user enables the ice-making function, the controller 5 controls the ice maker 1 to complete the actions of water injection, ice making, and ice ejection.

[0062] It should be noted that in specific implementation, through multiple tests, the flow signal values corresponding to different water pressures and different ice-forming areas within the unit time tp can be obtained, and based on the test results, the first mapping relationship between the water pressure signal values, the flow signal values, and the ice-forming area at the water outlet of the water injection pipe can be configured. In addition, in specific implementation, through multiple tests, the time required to melt the ice cubes with different ice-forming areas at the water outlet of the melting water injection pipe, that is, the ice melting time, can be obtained, and based on the test results, the second mapping relationship between the ice-forming area and the ice melting time can be configured.

[0063] It can be understood that if there is ice at the outlet of the water injection pipe, it will affect the water intake per unit time, and the returned flow signal per unit time will also change accordingly. Therefore, the current ice-forming area can be judged according to the value corresponding to this flow signal, and the heating control of the water inlet pipe can be carried out according to the current ice-forming area. In addition, due to different external water pressures, the water flow will also be affected. Therefore, in this application, by combining the value corresponding to the water pressure signal and the value corresponding to the flow signal to judge the ice-forming area, a more accurate current ice-forming area can be obtained, so as to more accurately control the start and stop of the heating wire.

[0064] Exemplarily, the heating device 2 is a heating wire, and the heating wire is wrapped around the outside of the water outlet of the water injection pipe.

[0065] For the refrigerator 10 provided in this embodiment, when it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal output by the water pressure detection device 4 at the water inlet of the water injection pipe, the flow signal output by the flow detection device 3 at the water outlet of the water injection pipe, and the first mapping relationship between the pre-configured water pressure signal values, flow signal values, and the ice-forming area at the water outlet of the water injection pipe, the current ice-forming area at the water outlet of the water injection pipe is determined. Then, according to the current ice-forming area and the second mapping relationship between the pre-configured ice-forming area and the ice melting time, the current ice melting time is determined. Then, according to the current ice melting time, the heating device 2 provided outside the water outlet of the water injection pipe is controlled to heat. Thus, the opening time of the heating wire can be accurately controlled according to the size of the ice-forming area at the water outlet of the water injection pipe, realizing heating the water outlet of the water injection pipe as needed, thereby reducing energy consumption and the time required for ice making.

[0066] As one of the optional embodiments, the flow detection device 3 is a pulsed flowmeter; the flow signal is a pulsed signal; the value corresponding to the flow signal is the number of pulses.

[0067] In specific implementation, according to tests, the number of pulses N and the water pressure P corresponding to different ice formation areas within the unit time tp are obtained. The controller 5 presets multiple pulse determination values as flow signal values according to the ice formation area, which are N1, N2... Nn respectively, and multiple water pressure signal values, which are P1, P2... Pn respectively, so as to configure the first mapping relationship. Then, according to the tests, the time required for the heating wire to be turned on for different ice formation areas, that is, the ice melting times t1, t2... tn, the second mapping relationship can be configured.

[0068] As one optional embodiment, the controller 5 is further configured to:

[0069] During the process of controlling the heating device 2 to heat, according to the value corresponding to the water pressure signal output by the water pressure detection device 4 and the first mapping relationship, determine the flow signal value corresponding to the ice formation area of 0 at the water outlet of the water injection pipe as the current flow threshold;

[0070] When it is detected that the value corresponding to the flow signal output by the flow detection device 3 reaches the current flow threshold, control the heating device 2 to stop heating.

[0071] It should be noted that since different room temperatures will affect the ice melting speed, in this embodiment, during the process of heating the water injection pipe, first determine the current flow threshold corresponding to the ice formation area of 0 according to the value corresponding to the water pressure signal, and continuously detect the flow at the water outlet of the water injection pipe through the flow detection device 3. If the value corresponding to the flow signal output by the flow detection device 3 reaches the current flow threshold, it means that the ice on the water injection pipe has completely melted. At this time, control the heating device 2 to stop heating to prevent the water temperature entering the ice maker 1 from rising due to overheating of the water injection pipe and avoid prolonging the ice making time.

[0072] As one optional embodiment, when it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow signal, and the first mapping relationship between the pre-configured water pressure signal value, flow signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe, including:

[0073] S121. When it is determined that the heating condition of the water injection pipe is satisfied, obtain the value corresponding to the water pressure signal and the value corresponding to the flow signal;

[0074] S122. According to the value corresponding to the flow signal and the preset error threshold, determine the value range corresponding to the flow signal; wherein, the starting value of the value range is the difference between the value corresponding to the flow signal and the preset error threshold, and the ending value of the value range is the sum of the value corresponding to the flow signal and the preset error threshold;

[0075] S123. In the first mapping relationship among the pre-configured water pressure signal value, flow signal value, and the ice formation area at the water outlet of the water injection pipe, search for the ice formation area corresponding to the water pressure signal value being the value corresponding to the water pressure signal and the flow signal value being within the value range as the current ice formation area.

[0076] It should be noted that since there will be a certain deviation between the value corresponding to the flow signal and the flow signal value in the first mapping relationship, in this embodiment, when determining the current ice formation area, a preset deviation threshold is set as the allowable deviation. When the value corresponding to the flow signal is within the deviation range, the corresponding current ice formation area can be determined, thus ensuring the accuracy of the heating control.

[0077] As one optional embodiment, the water injection pipe heating condition is:

[0078] Receiving a water injection start signal for instructing the water injection pipe to start water injection; or,

[0079] The value corresponding to the flow signal output by the flow detection device 3 is not 0.

[0080] In this embodiment, when receiving a water injection start signal for instructing the water injection pipe to start water injection, or the value corresponding to the flow signal output by the flow detection device 3 is not 0, it can be determined that water injection starts. Thus, when water injection starts, the water injection pipe can be timely controlled to be heated.

[0081] See Figure 3 , Figure 3 which is a schematic flowchart of a control method for a refrigerator provided by an embodiment of the present invention.

[0082] The control method for the refrigerator provided in this embodiment can be applied to the refrigerator provided in any of the above embodiments. The method includes:

[0083] S21. Receiving a water pressure signal output by a water pressure detection device and a flow signal output by a flow detection device; wherein, the water pressure detection device is used to detect the water pressure at the water inlet of the water injection pipe connected to the refrigerator; the flow detection device is used to detect the water flow at the water outlet of the water injection pipe; the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to an ice maker disposed in the refrigerator;

[0084] S22. When it is determined that the water injection pipe heating condition is satisfied, determine the current ice formation area at the water outlet of the water injection pipe according to the value corresponding to the water pressure signal, the value corresponding to the flow signal, and the first mapping relationship among the pre-configured water pressure signal value, flow signal value, and the ice formation area at the water outlet of the water injection pipe;

[0085] S23. Determine the current defrosting time according to the current ice formation area and a pre-configured second mapping relationship between the ice formation area and the defrosting time.

[0086] S24. Control the heating device to heat according to the current defrosting time; wherein, the heating device is arranged outside the water outlet of the water injection pipe.

[0087] For the control method of the refrigerator provided in this embodiment, when it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal output by the water pressure detection device at the water inlet of the water injection pipe, the flow signal output by the flow detection device at the water outlet of the water injection pipe, and a pre-configured first mapping relationship between the water pressure signal value, the flow signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe, and then determine the current defrosting time according to the current ice formation area and a pre-configured second mapping relationship between the ice formation area and the defrosting time. Then, control the heating device arranged outside the water outlet of the water injection pipe to heat according to the current defrosting time. Thus, it is possible to accurately control the opening time of the heating wire according to the size of the ice formation area at the water outlet of the water injection pipe, realizing heating the water outlet of the water injection pipe as needed, thereby reducing energy consumption and the time required for ice making.

[0088] As an optional embodiment, the method further includes:

[0089] During the process of controlling the heating device to heat, determine the flow signal value corresponding to the ice formation area at the water outlet of the water injection pipe being 0 according to the value corresponding to the water pressure signal output by the water pressure detection device and the first mapping relationship, as the current flow threshold.

[0090] When it is detected that the value corresponding to the flow signal output by the flow detection device reaches the current flow threshold, control the heating device to stop heating.

[0091] As an optional embodiment, the step of determining the current ice formation area at the water outlet of the water injection pipe according to the value corresponding to the water pressure signal, the value corresponding to the flow signal, and a pre-configured first mapping relationship between the water pressure signal value, the flow signal value and the ice formation area at the water outlet of the water injection pipe when it is determined that the heating condition of the water injection pipe is satisfied includes:

[0092] When it is determined that the heating condition of the water injection pipe is satisfied, obtain the value corresponding to the water pressure signal and the value corresponding to the flow signal.

[0093] Determine the numerical range corresponding to the flow signal according to the value corresponding to the flow signal and a preset error threshold; wherein, the starting value of the numerical range is the difference between the value corresponding to the flow signal and the preset error threshold, and the ending value of the numerical range is the sum of the value corresponding to the flow signal and the preset error threshold;

[0094] In a first mapping relationship among the preconfigured water pressure signal values, flow signal values, and the ice formation area at the water outlet of the water injection pipe, look up the ice formation area corresponding to the case where the water pressure signal value is the value corresponding to the water pressure signal and the flow signal value is within the numerical range, and use it as the current ice formation area.

[0095] As one optional embodiment, the water injection pipe heating condition is:

[0096] Receive a water injection start signal for instructing the water injection pipe to start water injection; or,

[0097] The value corresponding to the flow signal output by the flow detection device is not 0.

[0098] As one optional embodiment, the flow detection device is a pulsed flowmeter; the flow signal is a pulsed signal; the value corresponding to the flow signal is the number of pulses.

[0099] It should be noted that those skilled in the art can clearly understand that for the sake of convenience and conciseness of description, the specific description and beneficial effects of the methods in the above embodiments can refer to the corresponding descriptions and beneficial effects in the foregoing device embodiments, and will not be repeated here.

[0100] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the attached drawings of the device embodiments provided by the present invention, the connection relationship between modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement without creative efforts.

[0101] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A refrigerator, characterized in that, Comprising: A box body with a compartment inside; An ice maker disposed in the compartment; A water injection pipe, the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to the ice maker; A heating device disposed outside the water outlet of the water injection pipe; A flow rate detection device for detecting the water flow rate at the water outlet of the water injection pipe and outputting a flow rate signal; A water pressure detection device for detecting the water pressure at the water inlet of the water injection pipe and outputting a water pressure signal; A controller configured to: Receive the water pressure signal and the flow rate signal; When it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and the pre-configured first mapping relationship between the water pressure signal value, the flow rate signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe; According to the current ice formation area and the pre-configured second mapping relationship between the ice formation area and the ice melting time, determine the current ice melting time; According to the current ice melting time, control the heating device to heat.

2. The refrigerator according to claim 1, characterized in that, The controller is further configured to: During the process of controlling the heating device to heat, according to the value corresponding to the water pressure signal output by the water pressure detection device and the first mapping relationship, determine the value of the flow rate signal corresponding to the ice formation area of 0 at the water outlet of the water injection pipe as the current flow rate threshold; When it is detected that the value corresponding to the flow rate signal output by the flow rate detection device reaches the current flow rate threshold, control the heating device to stop heating.

3. The refrigerator according to claim 1, characterized in that, The step of, when it is determined that the heating condition of the water injection pipe is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and the pre-configured first mapping relationship between the water pressure signal value, the flow rate signal value and the ice formation area at the water outlet of the water injection pipe, determining the current ice formation area at the water outlet of the water injection pipe includes: When it is determined that the heating condition of the water injection pipe is satisfied, obtain the value corresponding to the water pressure signal and the value corresponding to the flow rate signal; According to the value corresponding to the flow rate signal and a preset error threshold, determine the value range of the flow rate signal; wherein, the starting value of the value range is the difference between the value corresponding to the flow rate signal and the preset error threshold, and the ending value of the value range is the sum of the value corresponding to the flow rate signal and the preset error threshold; In the pre-configured first mapping relationship between the water pressure signal value, the flow rate signal value and the ice formation area at the water outlet of the water injection pipe, search for the ice formation area corresponding to the water pressure signal value being the value corresponding to the water pressure signal and the flow rate signal value being within the value range as the current ice formation area.

4. The refrigerator according to claim 1, characterized in that, The heating condition of the water injection pipe is: Receiving a water injection start signal for instructing the water injection pipe to start injecting water; or, The value corresponding to the flow rate signal output by the flow rate detection device is not 0.

5. The refrigerator according to any one of claims 1 to 4, characterized in that, The flow rate detection device is a pulse flowmeter; the flow rate signal is a pulse signal; the value corresponding to the flow rate signal is the number of pulses.

6. A control method for a refrigerator, characterized in that, Comprising: Receive the water pressure signal output by the water pressure detection device and the flow rate signal output by the flow rate detection device; wherein, the water pressure detection device is used to detect the water pressure at the water inlet of the water injection pipe connected to the refrigerator; the flow rate detection device is used to detect the water flow rate at the water outlet of the water injection pipe; the water inlet of the water injection pipe is connected to a water source, and the water outlet of the water injection pipe is connected to an ice maker provided in the refrigerator; When it is determined that the water injection pipe heating condition is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and the first mapping relationship between the pre-configured water pressure signal value, flow rate signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe; According to the current ice formation area and the second mapping relationship between the ice formation area and the defrosting time pre-configured, determine the current defrosting time; According to the current defrosting time, control the heating device to heat; wherein, the heating device is provided outside the water outlet of the water injection pipe.

7. The control method of the refrigerator according to claim 6, wherein The method further includes: During the process of controlling the heating device to heat, according to the value corresponding to the water pressure signal output by the water pressure detection device and the first mapping relationship, determine the value of the flow rate signal corresponding to the ice formation area of 0 at the water outlet of the water injection pipe as the current flow rate threshold; When it is detected that the value corresponding to the flow rate signal output by the flow rate detection device reaches the current flow rate threshold, control the heating device to stop heating.

8. The control method of the refrigerator according to claim 6, characterized in that, The step of, when it is determined that the water injection pipe heating condition is satisfied, according to the value corresponding to the water pressure signal, the value corresponding to the flow rate signal, and the first mapping relationship between the pre-configured water pressure signal value, flow rate signal value and the ice formation area at the water outlet of the water injection pipe, determine the current ice formation area at the water outlet of the water injection pipe, includes: When it is determined that the water injection pipe heating condition is satisfied, obtain the value corresponding to the water pressure signal and the value corresponding to the flow rate signal; According to the value corresponding to the flow rate signal and the preset error threshold, determine the value range corresponding to the flow rate signal; wherein, the starting value of the value range is the difference between the value corresponding to the flow rate signal and the preset error threshold, and the ending value of the value range is the sum of the value corresponding to the flow rate signal and the preset error threshold; In the first mapping relationship between the pre-configured water pressure signal value, flow rate signal value and the ice formation area at the water outlet of the water injection pipe, find the ice formation area corresponding to the water pressure signal value being the value corresponding to the water pressure signal and the flow rate signal value being within the value range as the current ice formation area.

9. The control method of the refrigerator according to claim 6, characterized in that, The water injection pipe heating condition is: Receiving a water injection start signal for instructing the water injection pipe to start injecting water; or, The value corresponding to the flow rate signal output by the flow rate detection device is not 0.

10. The control method of the refrigerator according to any one of claims 6-9, characterized in that, The flow rate detection device is a pulsed flowmeter; the flow rate signal is a pulsed signal; the value corresponding to the flow rate signal is the number of pulses.

Images