Frost detection device, heat exchanger assembly, control method and refrigerator

Abstract

The present invention discloses a frosting detection device, a heat exchanger assembly, a control method and a refrigerator, comprising: two brackets respectively arranged on the upper side and the lower side of the heat exchanger; a plurality of first elastic members connecting the heat exchanger and the brackets; and a length detector for detecting the length of the first elastic members. By monitoring the elongation of the springs in real time, the present invention can accurately estimate the frosting condition of the evaporator assembly and the accurate timing of exiting the defrosting stage. When the evaporator assembly is defrosting and in the dripping stage, the vibration mode can be started, and different vibration amplitudes can be selected according to different frosting conditions to make the frost layer fall off in advance. At the same time, the vibration can greatly shorten the dripping stage, reduce the temperature rise amplitude of the evaporator chamber, and make the moisture of the evaporator assembly quickly drip during the vibration, achieving the effects of efficient defrosting and dehumidification.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a frosting detection device, a heat exchanger assembly, a control method and a refrigerator. Background Art

[0002] With the popularization of refrigerators in life, refrigerators can not only improve the aesthetics of the kitchen but also significantly improve the freshness preservation level of kitchen food and the quality of life. In recent years, the emergence of air-cooled refrigerators has greatly improved the freshness preservation time of food and the freshness state of food materials. Due to the special working principle of air-cooled refrigerators, almost all air-cooled refrigerators have an automatic defrosting stage. At present, the defrosting method adopted by air-cooled refrigerators is to use an electric heater for defrosting. The electric heating tube is located below the evaporator. After being powered on, the electric heating tube quickly releases heat due to the thermal effect of the resistance. The air is heated by the electric heating tube, and natural heat convection is formed to defrost the evaporator. When the heat convection of the electric heating tube is conducted to the upper part of the evaporator assembly, the temperature of the heat convection drops sharply. When the amount of frost formation is large, the defrosting efficiency of the upper and lower parts cannot reach the same level. When the frost layer at the lower part of the evaporator is completely removed, the heater still needs to continue heating to remove the frost layer at the upper part of the evaporator, which increases the defrosting time. This will greatly increase the temperature in the freezing evaporator chamber, which is not conducive to the freshness preservation of food. At the same time, there is still some water remaining on the evaporator during the defrosting process, and it will frost again when encountering cold during the normal refrigeration of the refrigerator and condense on the defrosting heater, resulting in a vicious cycle. When the amount of frost formation is small, the traditional judgment of the end of defrosting uses the temperature sensor on the evaporator assembly as a measurement standard. When the frost layer on the evaporator has been completely removed, since the temperature sensor has not reached the set temperature, the heater is still working, resulting in waste of resources and unnecessary temperature rise. Summary of the Invention

[0003] In order to solve the technical problem in the above-mentioned prior art that there is no judgment index other than temperature to judge the end of defrosting in the refrigerator, the present invention provides a frosting detection device, a heat exchanger assembly, a control method and a refrigerator.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a frosting detection device, which is characterized by comprising:

[0006] Two brackets respectively arranged on the upper side and the lower side of the heat exchanger;

[0007] A first elastic member connecting the heat exchanger and the bracket;

[0008] A length detector for detecting the length of the first elastic member.

[0009] Further, damping seats are provided at both ends of the bracket, and the first elastic member is connected to the damping seats of the bracket. The damping seat includes: a chute horizontally arranged on the bracket, a slider arranged in the chute, a fixed block arranged on the bracket, and a second elastic member connecting the fixed block and the slider.

[0010] Preferably, the length detector is specifically: a distance sensor arranged on the bracket or on the heat exchanger.

[0011] Further, mounting seats are provided at both ends of the bracket.

[0012] The present invention also proposes a heat exchanger assembly, including: the heat exchanger and the above-mentioned frosting detection device.

[0013] A plurality of vibration motors are provided on the heat exchanger. The vibration motors include: an X-axis linear motor arranged at both ends of the cross beam of the heat exchanger and a Z-axis linear motor arranged at the left and right ends of the heat exchanger. A heater is provided at the bottom of the heat exchanger.

[0014] The present invention also proposes a control method for a heat exchanger assembly, including the steps of:

[0015] Detect the length of the first elastic member and calculate the length change value of the first elastic member;

[0016] When the length change value is greater than the preset length change value, calculate the frosting volume V through the length change value;

[0017] Control the heater and the vibration motor to defrost the heat exchanger according to the control logic corresponding to the preset range where the frosting volume V is located.

[0018] Further, the preset range includes a first preset range, a second preset range, and a third preset range with gradually increasing corresponding volumes. The larger the volume corresponding to the preset range, the longer the vibration time of the vibration motor in its control logic.

[0019] Further, calculating the length change value of the first elastic member is specifically: subtracting the length of the heat exchanger when there is no frosting from the current length of the first elastic member to obtain the length change value, and the length of the heat exchanger when there is no frosting is updated after each defrosting.

[0020] Further, the control logic is specifically:

[0021] Control the heater to start working. After a preset time, control the Z-axis linear motor to work at a preset amplitude for a first preset time, and then turn off the Z-axis linear motor;

[0022] Control the X-axis linear motor to work at a preset amplitude;

[0023] Determine whether the ambient temperature Tz of the current heat exchanger chamber is less than the set temperature;

[0024] If so, determine whether the current frost formation volume V is less than the preset volume; if so, control the heater to stop working and control the X-axis linear motor to stop vibrating; if not, return to the step of detecting the change value ΔL0 of the length of the first elastic member;

[0025] If not, control the heater to stop working and control the X-axis linear motor to stop vibrating.

[0026] The present invention also provides a refrigerator, including the above heat exchanger assembly, and defrosting the heat exchanger using the control method of the above heat exchanger assembly.

[0027] Compared with the prior art, the present invention can accurately estimate the frost formation situation of the evaporator assembly and the accurate timing of exiting the defrosting stage by real-time monitoring of the elongation of the spring. When the evaporator assembly is defrosting and in the dripping stage, the vibration mode can be started, and different vibration amplitudes can be selected according to different frost formation situations to make the frost layer fall off in advance. At the same time, the vibration can greatly shorten the dripping stage, reduce the temperature rise amplitude of the evaporator chamber, and make the moisture of the evaporator assembly quickly drip during the vibration, achieving the effects of efficient defrosting and dehumidification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0030] Figure 2 It is a three-dimensional structural diagram of an embodiment of the present invention;

[0031] Figure 3 It is a schematic structural diagram of a bracket in an embodiment of the present invention;

[0032] Figure 4 For Figure 3 the layout structural diagram;

[0033] Figure 5 It is a flowchart of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The principle and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] At present, the defrosting method adopted by air-cooled refrigerators is to use an electric heater for defrosting. The electric heating tube is located below the evaporator. After being powered on, the electric heating tube quickly releases heat due to the thermal effect of the resistance. The air is heated by the electric heating tube, forming a natural heat convection to defrost the evaporator. When the heat convection of the electric heating tube is conducted to the upper part of the evaporator assembly, the temperature of the heat convection drops sharply. When the amount of frost formation is large, the defrosting efficiency of the upper and lower parts cannot reach the same level. When the frost layer at the lower part of the evaporator is completely removed, heating still needs to continue to remove the frost layer at the upper part of the evaporator, increasing the defrosting time, which will greatly increase the temperature in the freezing evaporator chamber and is not conducive to food preservation. At the same time, there is still some water remaining on the evaporator during the defrosting process, and it will frost again when the refrigerator is normally refrigerating and condense on the defrosting heater, causing a vicious cycle. When the amount of frost formation is small, the traditional judgment of the end of defrosting uses the temperature sensor on the evaporator assembly as a measurement standard. Since the frost layer on the evaporator has been completely removed, but the heater is still working because the temperature sensor has not reached the set temperature, resulting in waste of resources and unnecessary temperature rise. In view of this, the present invention proposes a frost detection device for detecting the amount of frost on the heat exchanger, as well as a heat exchange component and a control method, which can adjust the vibration amplitudes of different linear motors according to the amount of frost formation on the evaporator assembly and different defrosting stages. The heater is placed on the lower bracket. When defrosting and in the dripping stage, the vibration mode can be started, and different vibration amplitudes are selected according to different frost formation situations to make the frost layer fall off in advance. At the same time, the vibration can greatly shorten the dripping stage, reduce the temperature rise amplitude of the evaporator chamber, and make the water on the evaporator assembly quickly drip during the vibration, achieving the effects of efficient defrosting and dehumidification. By monitoring the real-time elongation of the spring, the frost formation situation of the evaporator assembly and the accurate timing of exiting the defrosting stage can be accurately predicted.

[0037] Such as Figure 1 、 2As shown in the figure, the present invention provides a frosting detection device, comprising: two brackets 1, a plurality of first elastic members 2, and a length detector. The two brackets are respectively an upper bracket 11 and a lower bracket 12. The upper bracket 11 is arranged at intervals on the top surface of the heat exchanger 4, and the lower bracket 12 is arranged at intervals on the bottom surface of the heat exchanger 4. The two ends of the upper bracket 11 are provided with first elastic members 2, and the first elastic members 2 are connected to the connecting pieces at both ends on the top of the heat exchanger 4, and the first elastic members are vertical. The two ends of the lower bracket 12 are also provided with first elastic members 2, and the top of the first elastic members 2 is connected to the connecting pieces at both ends on the bottom surface of the heat exchanger 4. That is, the first elastic member 2 between the upper bracket 11 and the top surface of the heat exchanger is in a stretched state, and the first elastic member 2 between the lower bracket 12 and the bottom surface of the heat exchanger 4 is in a compressed state. The length detector is used to detect the length of the first elastic member, that is, to detect the elongation of the first elastic member between the upper bracket and the top surface of the heat exchanger, and can also detect the contraction of the first elastic member between the lower bracket and the bottom surface of the heat exchanger. Thus, through the controller, according to the change in the length of the first elastic member, the frosting amount on the evaporator can be deduced, and the frosting degree can also be directly judged only by the elongation of the first elastic member. Because the more frosting there is, the longer the first elastic member is pulled. As long as the first elastic member returns to the initial state or near the initial state, it is judged that the defrosting is completed.

[0038] In a specific embodiment, as Figure 3 、 4 shown, damping seats 3 are provided at both ends of the bracket 1, and the first elastic member is connected to the damping seat 3 of the bracket 1. The bracket is specifically in the shape of a long strip plate. The damping seat 3 includes: a chute 32, a slider 33, a fixing block, and a second elastic member 31. The groove plate of the chute 32 is arranged on both sides of the bracket 1, the slider 33 is arranged in the chute and can slide along the chute, the fixing block is arranged at an interval from the slider 33, and the second elastic member 31 is connected between the fixing block and the slider 33. The second elastic member 31 is perpendicular to the first elastic member 2. The first elastic member provides a vertical force, and the second elastic member provides a lateral force, which can reduce vibration during the vibration defrosting of the heat exchanger.

[0039] The length detector can specifically be a distance sensor. The distance sensor is arranged on the upper bracket, specifically can be located on the damping seat, and its detection direction is vertically towards the connecting piece of the heat exchanger. The distance between it and the connecting piece is the length of the first elastic member. The length detector can specifically also be other detection devices, as long as it can detect the change in the length of the first elastic member in real time, it is within the protection scope of the present invention.

[0040] In a specific embodiment, mounting seats are provided at both ends of the bracket. The mounting seats are used to connect with the frame of the heat exchanger chamber. The mounting seats can specifically be connected to the frame by screws to ensure that the heat exchanger can be normally installed in the heat exchanger chamber.

[0041] The present invention also provides a heat exchanger assembly, which includes a heat exchanger and the above-mentioned frosting detection device.

[0042] As Figure 1 , 2 shown, in a specific embodiment, the heat exchanger is specifically the evaporator of a refrigerator. Two vertical connecting bars 21 are provided on both the left and right sides of the heat exchanger 4. The top of the connecting bar 21 is vertically bent outward to form a connecting piece for connecting the first elastic member. At the same time, in the top region of the heat exchanger, a cross beam 22 is also connected between the connecting bars, making the overall structure of the heat exchanger stable and reliable. A heater is provided at the bottom of the heat exchanger for defrosting.

[0043] A plurality of vibration motors are provided on the heat exchanger, and the vibration motors are used for vibration defrosting. The vibration motors include: an X-axis linear motor 61 provided at both ends of the cross beam of the heat exchanger and a Z-axis linear motor 62 provided at both the left and right ends of the heat exchanger. The Z-axis linear motor can be specifically provided on the fins of the heat exchanger or on the heat exchange tubes.

[0044] The inlet of the heat exchanger 4 is externally connected to a perturbable hose, so as to meet the maximum amplitude of the heat exchanger in the up, down, left, and right directions.

[0045] By placing the evaporator assembly with springs on the brackets with springs, one spring on the left and right of the upper bracket and one spring on the left and right of the lower bracket, fixing the evaporator assembly with springs to the upper and lower brackets, and fixing the upper and lower brackets to the spring fixed in the evaporator chamber. A Z-axis linear motor is placed at both the left and right ends of the evaporator assembly respectively, which can provide vibration in the up and down directions, and an X-axis linear motor is placed at both the left and right ends of the cross frame of the evaporator assembly respectively, which can provide vibration in the left and right directions.

[0046] In a specific embodiment, the above-mentioned first elastic member and the second elastic member are both springs.

[0047] As Figure 5 shown, the present invention also provides a defrosting control method for a heat exchanger assembly, that is, a defrosting control method for a refrigerator, which specifically includes the steps of:

[0048] The refrigerator operates in refrigeration mode;

[0049] Real-time detect the length value of the first elastic member, calculate the length change value of the first elastic member, and determine whether the length change value exceeds the preset length change value ΔL0;

[0050] If so, deduce the frosting volume V through the length change value, and control the heater and the vibration motor to defrost the heat exchanger according to the control logic corresponding to the preset range where the frosting volume V is located;

[0051] If not, return to the step of the refrigerator operating in refrigeration mode.

[0052] The specific calculation method for calculating the frosting volume V through the length change value is as follows: V = [2(L - L0)k] / (gρ), where V is the volume of ice frost on the evaporator, ρ is the density of ice, k is the elastic coefficient of the spring (the first elastic member), and the volume of frost on the evaporator can be accurately measured through V. L0 is the length of the spring (the first elastic member) on the evaporator measured when there is no frost on the evaporator, and L is the length of the spring (the first elastic member) during the operation of the refrigerator.

[0053] In a specific embodiment, three preset ranges representing the frosting volume can be set, namely the first preset range, the second preset range, and the third preset range. They respectively correspond to V0 ≤ V < V1, V1 ≤ V < V2, V ≥ V2; and the larger the volume corresponding to each preset range, the longer the vibration time of the vibration motor in its control logic.

[0054] The control logic of the preset range is specifically as follows:

[0055] Control the heater to start working. After the heater works for a preset time, control the Z-axis linear motor to work with a preset amplitude for a first preset time, and then turn off the Z-axis linear motor;

[0056] Control the X-axis linear motor to work with a preset amplitude;

[0057] Judge whether the ambient temperature Tz of the current heat exchanger chamber is less than the set temperature;

[0058] If so, judge whether the current frosting volume V is less than the preset volume; if so, control the heater to stop working and control the X vibration motor to stop vibrating; if not, return to the step of detecting the length change value of the first elastic member;

[0059] If not, control the heater to stop working and control the X vibration motor to stop vibrating to complete the defrosting process.

[0060] The specific method for calculating the length change value of the first elastic member is as follows: Subtract the length L0 of the heat exchanger when there is no frost from the current length L of the first elastic member to obtain the length change value. The length L0 of the heat exchanger when there is no frost is updated after each defrosting to avoid affecting the measurement accuracy due to the aging of the first elastic member.

[0061] Thus, by detecting the frosting volume in real time, auxiliary defrosting is performed by a vibration motor when the heater defrosts. According to the different frosting amounts and defrosting stages of the evaporator assembly, different vibration amplitudes of different linear motors are adjusted. The heater is placed on the lower bracket. When defrosting and in the dripping stage, the vibration mode can be started. Different vibration amplitudes are selected according to different frosting conditions to make the frost layer fall off in advance. At the same time, the vibration can greatly shorten the dripping stage, reduce the temperature rise amplitude of the evaporator chamber, and make the moisture of the evaporator assembly quickly drip during the vibration, achieving the effects of efficient defrosting and dehumidification. By real-time monitoring of the spring elongation, the frosting condition of the evaporator assembly and the accurate timing of exiting the defrosting stage can be accurately estimated.

[0062] The present invention also proposes a refrigerator that uses the above heat exchanger assembly and corresponding control method for defrosting. In addition to refrigerators, the above heat exchanger assembly and corresponding control method can also be applied to air conditioners or other refrigeration components.

[0063] The following is a specific description of the length conversion volume and control description of the present invention.

[0064] When there is no frosting on the evaporator, the length L0 of the spring on the evaporator is measured. At the same time, the length L of the spring during the operation of the refrigerator is detected in real time. Since the greater the frosting amount on the evaporator, the weight will increase accordingly, and the length of the spring will also increase. The frosting condition of the evaporator is measured by the change amount of length ΔL. According to Hooke's law, ΔF = kΔX, it can be known that the greater ΔX is, the greater the force on the spring is, where K is the elastic coefficient of the spring. In this method, ΔX and ΔL are the same variable. Since there are upper and lower springs on the evaporator, the elongation amount ΔL of the upper spring should be equal to the compression amount of the lower spring. Therefore, the total change amount of the upper and lower springs should be 2ΔF = 2ΔL = 2(L - L0). From this, the change amount of the evaporator weight ΔG = 2ΔF can be calculated, and then Δm = ΔG / g = (2ΔF) / g = [(2ΔL)k] / g = [2(L - L0)k] / g, where g is the acceleration due to gravity. Since this mass increase is all due to the ice frost component, V = Δm / ρ = [2(L - L0)k] / (gρ), where V is the volume of the ice frost on the evaporator, and ρ is the density of ice. The frosting volume on the evaporator can be accurately measured through V.

[0065] In Figure 5 the control method, V0 is the volume when the spring elongation amount is ΔL0, that is, the preset volume, and it is also one of the conditions for measuring whether to stop defrosting. In the control method, V1 and V2 are the boundaries for measuring the frosting volume in different stages. Motor X refers to the X-axis linear motor, and motor Z refers to the Y-axis linear motor.

[0066] t0, t1, and t3 are artificially set working hours, and h1, h2, and h3 are artificially set motor amplitudes. The above parameters are arranged from smallest to largest. Tz and T0 are the ambient temperature of the evaporator chamber and the set temperature for exiting defrosting, respectively. According to the different frosting amounts and defrosting stages of the evaporator assembly, the vibration amplitudes of different linear motors are adjusted. The heater is placed above the lower bracket. When defrosting and in the dripping stage, the vibration mode can be started. Different vibration amplitudes are selected according to different frosting conditions to make the frost layer fall off in advance. At the same time, the vibration can greatly shorten the dripping stage, reduce the temperature rise amplitude of the evaporator chamber, and make the moisture of the evaporator assembly drip rapidly during the vibration, achieving the effects of efficient defrosting and dehumidification. By real-time monitoring of the spring elongation, the frosting condition of the evaporator assembly and the accurate timing of exiting the defrosting stage can be accurately estimated.

[0067] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0069] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0070] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0071] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0072] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat exchanger assembly, characterized in that, Comprising a heat exchanger and a frosting detection device; The frosting detection device includes: A plurality of brackets respectively arranged on the upper side and the lower side of the heat exchanger; A plurality of first elastic members connected between the heat exchanger and the brackets; A length detector for detecting the length of the first elastic member; A plurality of vibration motors are provided on the heat exchanger, and the vibration motors include: an X-axis linear motor arranged at both ends of the cross beam of the heat exchanger and a Z-axis linear motor arranged at the left and right ends of the heat exchanger; The control method of the heat exchanger assembly includes: Detecting the length of the first elastic member and calculating the length change value of the first elastic member; When the length change value is greater than a preset length change value, calculating the frosting volume through the length change value; Controlling a heater and a vibration motor to defrost the heat exchanger according to the control logic corresponding to the preset range where the frosting volume is located; The specific control logic is: Controlling the heater to start working, and after a preset time, controlling the Z-axis linear motor to work at a preset amplitude for a first preset time, and then turning off the Z-axis linear motor; Controlling the X-axis linear motor to work at a preset amplitude; Judging whether the ambient temperature of the current heat exchanger chamber is less than the set temperature; If so, judging whether the current frosting volume is less than a preset volume; if so, controlling the heater to stop working and controlling the X-axis linear motor to stop vibrating; if not, returning to the step of detecting the length of the first elastic member; If not, controlling the heater to stop working and controlling the X-axis linear motor to stop vibrating.

2. The heat exchanger assembly according to claim 1, characterized in that, Vibration damping seats are provided at both ends of the bracket, and the first elastic member is connected to the vibration damping seats of the bracket.

3. The heat exchanger assembly according to claim 2, characterized in that, The vibration damping seat includes: a chute horizontally arranged on the bracket, a slider arranged in the chute, a fixed block arranged on the bracket, and a second elastic member connecting the fixed block and the slider.

4. The heat exchanger assembly according to claim 1, characterized in that, The length detector is specifically: a distance sensor arranged on the bracket or on the heat exchanger.

5. The heat exchanger assembly according to claim 1, characterized in that, A heater is provided at the bottom of the heat exchanger.

6. The heat exchanger assembly according to claim 1, characterized in that, The preset range includes a first preset range, a second preset range and a third preset range with sequentially increasing corresponding volumes. The larger the volume corresponding to the preset range, the longer the vibration time of the vibration motor in its control logic.

7. The heat exchanger assembly according to claim 1, characterized in that, The specific calculation of the length change value of the first elastic member is: subtracting the length of the heat exchanger when there is no frosting from the current length of the first elastic member to obtain the length change value.

8. A refrigerator, characterized in that, Including the heat exchanger assembly according to any one of claims 1 to 7.

Images