Control methods for heat pump dryers and air coolers, computer equipment, and heat pump dryers

Abstract

This invention relates to a control method for a cooling fan in a heat pump dryer, a computer device, and a heat pump dryer. The method includes the following steps: obtaining the cooling demand of the heat pump dryer; if the cooling demand is yes, pumping the air discharged from the heat pump dryer into a target space; if the cooling demand is no, stopping the pumping of the air discharged from the heat pump dryer into the target space. This invention cools the target space by delivering low-temperature air to it without affecting the operating efficiency, waste heat recovery, or the dryer's self-protection logic, thus fully utilizing the resources of the heat pump dryer.

Description

Technical Field

[0001] This invention relates to the field of heat pump dryer technology, and in particular to a heat pump dryer cooling fan control method, computer equipment, and heat pump dryer. Background Technology

[0002] Existing heat pump dryers are based on the principle of a heat pump system. The compressor compresses and outputs high-temperature, high-pressure refrigerant. This high-temperature, high-pressure refrigerant exchanges heat with the air in the condenser, then enters the throttling element for throttling, and then flows into the evaporator system. The heat in the air forms gaseous refrigerant, which then enters the compressor, completing the cycle. In the condenser, the air exchanges heat with the refrigerant and is heated. The heated air then enters the drum to dry the clothes.

[0003] In existing heat pump dryers, in order to recover waste heat from the high-temperature residual air discharged from the drum, the residual air is usually passed to the evaporator. The evaporator absorbs the heat from the residual air, and after heat exchange, the residual air is transformed into low-temperature air. This low-temperature air is generally discharged outside the heat pump dryer. It can be seen that heat pump dryers have the potential for cooling. A method is needed that can ensure the efficient operation of heat pump dryers while utilizing the low-temperature air generated during waste heat recovery. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a control method for the cooling fan of a heat pump dryer, a computer device, and a heat pump dryer. The present invention delivers low-temperature air to the target space, thereby cooling the target space without affecting the operating efficiency of the heat pump dryer, the waste heat recovery of the heat pump dryer, or the protection logic of the heat pump dryer, thus making full use of the resources of the heat pump dryer.

[0005] A method for controlling the cooling fan of a heat pump dryer, the heat pump dryer including a heat pump system, a drum, a drum fan, a first exhaust duct, and a cooling fan, the heat pump system including a condenser and an evaporator connected by pipes, the condenser being disposed on a pipe connected to one end of the drum, the other end of the drum being connected to the input end of the drum fan, the output end of the drum fan being connected to one end of the first exhaust duct, the evaporator being disposed at the other end of the first exhaust duct, a pressure detection unit being disposed on the pipes of the heat pump system, the input end of the cooling fan being connected to the other end of the first exhaust duct, and the output end of the cooling fan being connected to a target space;

[0006] The heat pump dryer cooling fan control method includes the following steps: obtaining the cooling demand of the heat pump dryer; if the cooling demand is yes, running the cooling fan to draw the air after heat exchange with the evaporator to the target space; if the cooling demand is no, stopping the cooling fan and exhausting the air after heat exchange with the evaporator to the outside of the heat pump dryer.

[0007] The present invention discloses a control method for the cooling fan of a heat pump dryer, which enables the delivery of low-temperature air to the target space when there is a cooling demand, thereby making full use of the resources of the heat pump dryer.

[0008] Furthermore, it also includes the following steps: obtaining the operating pressure of the evaporator side of the heat pump dryer and the actual opening degree of the exhaust valve; if the operating pressure is higher than a preset high pressure threshold, adjusting the actual opening degree of the exhaust valve to the target opening degree of the exhaust valve according to a first preset condition; the preset high pressure threshold is the pressure of the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C.

[0009] Furthermore, the first preset condition is: the target opening degree = (the operating pressure - the preset high pressure threshold) × the valve opening degree adjustment coefficient.

[0010] Furthermore, the method also includes the following steps: obtaining the target opening degree for cooling of the exhaust valve; if the target opening degree for cooling exists, adjusting the actual opening degree of the exhaust valve to the target opening degree for cooling.

[0011] Furthermore, if the operating pressure is lower than the preset low pressure threshold, the actual opening of the exhaust valve is adjusted to the target opening of the exhaust valve according to the second preset condition; the preset low pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 16°C.

[0012] Furthermore, the second preset condition is: the target opening degree = (the preset low pressure threshold - the operating pressure) × the valve opening degree adjustment coefficient.

[0013] Furthermore, the method also includes the following steps: obtaining the actual opening degree of the exhaust valve for pressure boosting; if the actual opening degree for pressure boosting exists, adjusting the actual opening degree of the exhaust valve to the actual opening degree for pressure boosting.

[0014] Furthermore, the method also includes the following steps: obtaining the operating pressure of the condenser side of the heat pump dryer; if the operating pressure is lower than the rated pressure, changing the cooling demand to no and outputting a low-pressure signal.

[0015] The present invention also provides a computer device for controlling the cooling fan of a heat pump dryer, comprising: a signal acquisition module for acquiring the cooling demand of the heat pump dryer; a cooling demand judgment module for judging whether there is a cooling demand; and a cooling fan start / stop module for starting the cooling fan when the cooling demand is yes, and pumping the air after heat exchange with the evaporator to the target space; and stopping the cooling fan when the cooling demand is no, and discharging the air after heat exchange with the evaporator to the outside of the heat pump dryer.

[0016] The present invention also provides a heat pump dryer, including at least one memory and at least one processor; the memory is used to store one or more computer programs, which, when executed by the processor, are used to implement the steps of the above-described method for controlling the cooling fan of a heat pump dryer; when the one or more computer programs are executed by the at least one processor, the at least one processor implements the steps of any of the above-described methods.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. When there is a cooling demand in the target space, low-temperature air is delivered to the target space to make full use of the resources of the heat pump dryer.

[0019] 2. When the heat pump pressure of the heat pump dryer is too high to meet the cooling demand of the target space, the pressure is reduced by adjusting the opening of the exhaust valve of the heat pump dryer to ensure that the temperature of the low-temperature air can meet the cooling demand of the target space, thus improving the applicability of using the heat pump dryer for cooling. Furthermore, by limiting the adjustment method of the actual opening, the adjustment of the actual opening is made more accurate and effective, avoiding over-adjustment and waste of resources. Furthermore, when the heat pump of the heat pump dryer has a cooling demand, the cooling demand of the heat pump dryer is prioritized, and the opening is adjusted to the cooling target opening rather than the high-pressure cooling target opening, which can effectively protect the heat pump dryer.

[0020] 3. When the pressure of the heat pump in the heat pump dryer is too low, causing the air to become too cold and affecting the comfort of users in the target space, the actual opening degree can be reduced according to the specified method to ensure the comfort of users in the target space. Furthermore, when the heat pump in the heat pump dryer has a pressure boosting requirement, the pressure boosting requirement of the heat pump dryer should be prioritized. The actual opening degree should be adjusted to the pressure boosting actual opening degree instead of reducing the opening degree of the heat pump dryer. This can effectively improve the working efficiency of the heat pump dryer and effectively ensure that waste heat is fully recovered.

[0021] 4. When the heat pump dryer just starts running and the pressure of the heat pump has not yet risen to the rated pressure, reject the cooling request of the heat pump dryer to ensure that the heat pump dryer can quickly reach the rated pressure and improve the operating efficiency of the heat pump dryer.

[0022] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a front structural diagram of a heat pump dryer according to the present invention;

[0024] Figure 2 This is a schematic diagram of the rear structure of a heat pump dryer according to the present invention;

[0025] Figure 3 This is a simplified structural diagram of a heat pump clothes dryer according to the present invention;

[0026] Figure 4 This is a schematic diagram of the computer device for controlling the air cooler of a heat pump dryer according to the present invention.

[0027] Among them, condenser 1, evaporator 2,

[0028] Air inlet duct 3, drum 4, drum fan 5, first exhaust duct 6, second exhaust duct 7, exhaust valve 8, cooling fan 9, computer equipment 10 for adjusting the exhaust valve to protect the heat pump of the heat pump dryer, signal acquisition module 1001, heat pump operating pressure threshold judgment module 1002, and exhaust valve actual opening adjustment module 1003. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] It should be understood that the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments.

[0031] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the embodiments in this application.

[0032] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0033] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

[0035] This invention provides a control method for the cooling fan of a heat pump dryer. For ease of understanding, this invention illustrates the method based on a heat pump dryer suitable for the control method described herein. It should be noted that the heat pump dryer illustrated here is merely illustrative. The components that are related to each other can be physically connected or physically separated. For example, the connection between two components can be a direct contact connection or an indirect connection achieved through a third component. Similarly, the fixing of two components can be direct or indirect. Those skilled in the art can select some or all of the modules to achieve the purpose of this disclosure according to actual needs.

[0036] Please see Figure 1 , Figure 2 and Figure 3The heat pump dryer exemplified in this invention includes a heat pump system (not shown), which comprises a compressor (not shown), a condenser 1, and an evaporator 2. The heat pump dryer also includes an air inlet duct 3, a drum 4, a drum fan 5, a first exhaust duct 6, a second exhaust duct 7, an exhaust valve 8, a cooling fan 9, several pressure detection units (not shown), and a cooling switch (not shown). The output end of the compressor is connected to the input end of the condenser 1, the output end of the condenser 1 is connected to the input end of the evaporator 2, and the output end of the evaporator 2 is connected to the input end of the compressor. Several pressure detection units are installed on the piping of the heat pump system. One end of the air inlet duct 3 is connected to the external environment, and the other end of the air inlet duct 3 is connected to one end of the drum 4. The other end of the drum 4 is connected to the input end of the drum fan 5, the output end of the drum fan 5 is connected to one end of the first exhaust duct 6, the other end of the first exhaust duct 6 is connected to the input end of the cooling fan 9, and the output end of the cooling fan 9 is connected to the target space, which refers to the space that needs cooling, such as an indoor space; one end of the second exhaust duct 7 is fixed to the inner wall of the exhaust port, and the other end of the second exhaust duct 7 is fixed to the exhaust valve 8; the condenser 1 is fixed to one end of the inlet duct 3, and the evaporator 2 is fixed to the other end of the first exhaust duct 6. The first exhaust duct between the evaporator 2 and one end of the first exhaust duct 6 is also provided with an air inlet (not shown in the figure) that connects to the external environment; when the user does not need cooling, the cooling switch will be turned off. When the air cooler 9 stops operating, the heat pump dryer operates as follows: the drum fan 5 draws in ambient air into the heat pump dryer. This ambient air enters the drum 4 from its input end via the air inlet duct 3. During this process, because the condenser 1 is located at one end of the air inlet duct 3, the ambient air exchanges heat with the condenser 1, increasing its temperature to high-temperature air. This high-temperature air then enters the drum 4 and exchanges heat again, decreasing its temperature to residual heat air. Since the exhaust valve 8 is closed at the start, the residual heat air is discharged outside the heat pump dryer via the drum fan 5 and other exhaust ports (not shown) in the first exhaust duct 6. Meanwhile, because the evaporator 2 is located at the other end of the first exhaust duct 6... The residual heat air exchanges heat with the evaporator 2. After heat exchange, the temperature of the residual heat air is further reduced, turning into low-temperature air, and then discharged outside the heat pump dryer. During the normal operation of the heat pump dryer, if the exhaust valve 8 is opened, part of the residual heat air discharged from the drum 4 will be discharged outside the heat pump dryer along the second exhaust duct 7. On this basis, when the user has a cooling need, he will turn on the cooling switch. At this time, the cooling fan 9 will run, and the low-temperature air will be transported to the target space by the cooling fan 9. If the exhaust valve 8 is opened, since part of the residual heat air is discharged from the second exhaust duct 7, under the action of the cooling fan 9, the air from the outside environment will be drawn into the heat pump dryer along the air inlet and exchange heat with the evaporator 2, and then transported to the target space by the cooling fan 9.The following description uses the heat pump dryer as an example to illustrate the cooling fan control method of the heat pump dryer of the present invention.

[0037] In one embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method includes the following steps:

[0038] Obtain the cooling demand of the heat pump dryer (i.e., obtain the on / off state of the cooling switch);

[0039] If the cooling switch is turned on, the cooling demand is yes. If the user has a cooling demand, the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0040] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged into the external environment of the heat pump dryer.

[0041] As the heat pump dryer operates, the pressure gradually increases, which may cause the temperature of the low-temperature air to become too high, preventing it from effectively cooling the target space. Therefore, it is necessary to lower the temperature of the low-temperature air.

[0042] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method includes the following steps:

[0043] The cooling demand of the heat pump dryer (i.e., the on / off state of the cooling switch), the operating pressure on the evaporator side of the heat pump dryer, and the actual opening of the exhaust valve are obtained.

[0044] If the cooling switch is turned on, the cooling demand is yes. If the user has a cooling demand, the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0045] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged into the external environment of the heat pump dryer.

[0046] If the operating pressure is higher than the preset high pressure threshold, adjust the actual opening of the exhaust valve to the target opening of the exhaust valve according to the first preset condition.

[0047] The preset high-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C.

[0048] Since the operating pressure detected by the pressure detection unit changes according to the adjustment of the exhaust valve 8, if the change in the opening of the exhaust valve 8 is too large during the adjustment process, the fluctuation of the operating pressure will also increase, leading to a more complex adjustment process. Therefore, it is necessary to find the relationship between the adjustment of the exhaust valve 8 and the change in operating pressure to simplify the adjustment process as much as possible.

[0049] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method includes the following steps:

[0050] The cooling demand of the heat pump dryer (i.e., the on / off state of the cooling switch), the operating pressure on the evaporator side of the heat pump dryer, and the actual opening of the exhaust valve are obtained.

[0051] If the cooling switch is turned on, the cooling demand is yes. If the user has a cooling demand, the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0052] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged into the external environment of the heat pump dryer.

[0053] If the operating pressure is higher than the preset high pressure threshold, the actual opening of the exhaust valve is adjusted to the target opening of the exhaust valve according to the first preset condition. The first preset condition is: target opening = (operating pressure - preset high pressure threshold) × valve opening adjustment coefficient.

[0054] The preset high-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C. The damper opening adjustment coefficient is adjusted according to the following principles: First, the principle of not reporting high pressure, that is, the opening of the damper should be adjusted to the maximum before the operating pressure reaches the preset pressure threshold. For example, when the preset pressure threshold is 29.5, it must be ensured that the exhaust damper 5 must be fully open when the pressure is at most 29.5. Second, the principle of not over-adjusting, that is, the opening adjustment of the damper should not be too large. For example, when it is necessary to maintain the operating pressure at 28, it is not possible for the operating pressure to drop below 28 after the actual opening is adjusted to the target opening. Therefore, the damper opening adjustment coefficient is affected by the refrigerant properties, the setting of the high-pressure warning value, and the action time of the damper itself, and needs to be determined according to the actual situation.

[0055] As the heat pump dryer operates, its pressure gradually increases. To prevent excessive pressure in the heat pump system, the dryer needs to adjust the opening of the exhaust valve to lower the temperature. Therefore, it is necessary to understand how to adjust the exhaust valve in this situation.

[0056] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the evaporator 2 and the compressor). The heat pump dryer cooling fan control method further includes the following steps:

[0057] Obtain the target opening degree for cooling of exhaust valve 8;

[0058] If the target cooling opening exists, and the current heat pump system pressure is too high, the actual opening of the exhaust valve will be adjusted to the target cooling opening to cool the heat pump system.

[0059] Since there is a process of increasing the operating pressure of a heat pump dryer when it first starts running, the temperature of the air is low during this period, which may affect the user's comfort. Therefore, it is necessary to determine when the heat pump dryer starts cooling.

[0060] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method includes the following steps:

[0061] The cooling demand of the heat pump dryer (i.e., the on / off state of the cooling switch), the operating pressure on the evaporator side of the heat pump dryer, and the actual opening of the exhaust valve are obtained.

[0062] If the cooling switch is turned on, the cooling demand is yes. If the user has a cooling demand, the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0063] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged to the external environment of the heat pump dryer.

[0064] If the operating pressure is higher than the preset high pressure threshold, adjust the actual opening of the exhaust valve to the target opening of the first exhaust valve according to the first preset condition.

[0065] If the operating pressure is lower than the preset low pressure threshold, adjust the actual opening of the exhaust valve 8 to the target opening of the second exhaust valve according to the second preset condition;

[0066] The preset high-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C; the preset low-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 16°C.

[0067] During the operation of a heat pump dryer, the operating pressure detected by the pressure detection unit changes according to the adjustment of the exhaust valve 8. If the opening of the exhaust valve 8 changes too much during adjustment, the fluctuation of the operating pressure will also increase, complicating the adjustment process. Therefore, it is necessary to find the relationship between the adjustment of the exhaust valve 8 and the change in operating pressure to simplify the adjustment process as much as possible.

[0068] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method includes the following steps:

[0069] The cooling demand of the heat pump dryer (i.e., the on / off state of the cooling switch), the operating pressure on the evaporator side of the heat pump dryer, and the actual opening of the exhaust valve are obtained.

[0070] If the cooling switch is turned on, the cooling demand is yes. If the user has a cooling demand, the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0071] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged to the external environment of the heat pump dryer.

[0072] If the operating pressure is higher than the preset high pressure threshold, adjust the actual opening of the exhaust valve to the target opening of the first exhaust valve according to the first preset condition.

[0073] If the operating pressure is lower than the preset low pressure threshold, the actual opening of the exhaust valve 8 is adjusted to the target opening of the second exhaust valve according to the second preset condition; the second preset condition is: target opening = (preset low pressure threshold - operating pressure) × valve opening adjustment coefficient;

[0074] The preset high-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C; the preset low-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 16°C.

[0075] Since heat pump dryers need to increase pressure by adjusting the opening of the exhaust valve during operation to ensure efficient operation, it is necessary to clarify the adjustment method of the exhaust valve at this time.

[0076] In a preferred embodiment, the heat pump dryer includes only one pressure detection unit, which is located on the evaporator side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor). The heat pump dryer cooling fan control method further includes the following steps:

[0077] Obtain the actual opening degree of the exhaust valve 8 under pressure boost;

[0078] If the actual opening of the pressure boosting valve exists, the heat pump dryer needs to boost the pressure. The actual opening of the exhaust valve 8 should be adjusted to the actual opening of the pressure boosting valve to ensure the efficient operation of the heat pump dryer.

[0079] Since heat pump dryers need to heat up quickly when they first start running so that they can quickly increase the pressure and work normally, opening the exhaust valve at this time to cool them would conflict with the rapid heating of the heat pump dryer. Therefore, it is necessary to clarify the adjustment method of the exhaust valve at this time.

[0080] In an optional embodiment, the heat pump dryer includes only two pressure detection units, which are respectively located on the evaporation side of the heat pump dryer (i.e., between the output end of the evaporator 2 and the input end of the compressor) and the condensation side of the heat pump dryer (i.e., between the output end of the compressor and the input end of the condenser 1). The heat pump dryer cooling fan control method includes the following steps:

[0081] Obtain the operating pressure on the condenser side of the heat pump dryer and the cooling demand of the heat pump dryer (i.e., obtain the on / off status of the cooling switch).

[0082] If the cooling switch is turned on and the operating pressure is higher than the rated pressure, then the cooling demand is yes. If the user has a cooling demand and this demand does not conflict with the rapid heating of the heat pump dryer, then the cooling fan 9 will run. The cooling fan 9 will deliver the air that has exchanged heat with the evaporator to the target space to cool the target space.

[0083] If the cooling switch is turned on and the operating pressure is lower than the rated pressure, the cooling demand is "yes". If the user has a cooling demand but this demand conflicts with the rapid heating of the heat pump dryer, the cooling demand will be changed to "no". The cooling fan 9 will not run and will output a low-pressure signal to remind the user that the heat pump dryer is rejecting the cooling demand because it needs to heat up quickly.

[0084] If the cooling switch is off, the cooling demand is no. If the user has no cooling demand, the cooling fan 9 will stop running, and the air that has exchanged heat with the evaporator will be discharged into the external environment of the heat pump dryer.

[0085] Secondly, the present invention also provides a computer device 10 for controlling the cooling fan of a heat pump dryer, such as... Figure 2 As shown, the computer device includes:

[0086] The signal acquisition module 1001 is used to acquire the cooling demand of the heat pump dryer;

[0087] Cooling demand determination module 1002 is used to determine whether there is a cooling demand;

[0088] The air extraction module 1003 is used to start the cooling fan when the cooling demand is met, and to extract the air that has exchanged heat with the evaporator to the target space; when the cooling demand is not met, it turns off the cooling fan and discharges the air that has exchanged heat with the evaporator to the outside of the heat pump dryer.

[0089] In a preferred embodiment, the computer device further includes:

[0090] The evaporator-side signal acquisition module is used to acquire the operating pressure on the evaporator side of the heat pump dryer and the actual opening degree of the exhaust valve.

[0091] The preset high pressure threshold judgment module is used to determine whether the operating pressure is higher than the preset high pressure threshold.

[0092] The high-pressure actual opening adjustment module is used to adjust the actual opening of the exhaust valve to the target opening of the exhaust valve according to the first preset condition when the operating pressure is higher than the preset high-pressure threshold.

[0093] In a preferred embodiment, the computer device further includes:

[0094] The first preset condition calculation module is used to calculate the target opening according to the calculation formula: target opening degree = (operating pressure - preset high pressure threshold) × valve opening degree adjustment coefficient.

[0095] In a preferred embodiment, the computer device further includes:

[0096] The cooling target opening degree acquisition module is used to acquire the cooling target opening degree of the heat pump dryer;

[0097] The cooling target opening adjustment module is used to adjust the actual opening to the cooling target opening when the cooling target opening exists.

[0098] In a preferred embodiment, the computer device further includes:

[0099] The preset low-pressure threshold judgment module is used to determine whether the operating pressure is lower than the preset low-pressure threshold.

[0100] The low-pressure actual opening adjustment module is used to adjust the actual opening of the exhaust valve to the target opening of the exhaust valve according to the second preset condition when the operating pressure is lower than the preset low-pressure threshold.

[0101] In a preferred embodiment, the computer device further includes:

[0102] The second preset condition calculation module is used to calculate the target opening based on the calculation formula: Target opening degree = (Preset low pressure threshold - Operating pressure) × Air valve opening degree adjustment coefficient;

[0103] In a preferred embodiment, the computer device further includes:

[0104] The actual pressure boosting opening module is used to obtain the actual pressure boosting opening of the heat pump dryer.

[0105] The boost actual opening adjustment module is used to adjust the actual opening to the boost actual opening when the boost actual opening exists.

[0106] In a preferred embodiment, the computer device further includes:

[0107] The condenser-side operating pressure acquisition module is used to acquire the operating pressure of the condenser side of the heat pump dryer.

[0108] The rated pressure judgment module is used to determine whether the operating pressure is lower than the rated pressure.

[0109] A cooling demand modification module is used to change the cooling demand to no when the operating pressure is lower than the rated pressure.

[0110] A low-pressure signal output module is used to output a low-pressure signal when the operating pressure is lower than the rated pressure and the cooling demand is changed to no.

[0111] For the computer device embodiments, since they basically correspond to the method embodiments, relevant details can be found in the descriptions of the method embodiments. The computer device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, computer devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0112] Thirdly, the present invention also provides a heat pump dryer, including at least one memory and at least one processor;

[0113] The memory is used to store one or more computer programs, which, when executed by the at least one processor, cause the at least one processor to implement the steps of the above-described heat pump dryer evaporative cooler control method.

[0114] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0115] 1. When there is a cooling demand in the target space, low-temperature air is delivered to the target space to make full use of the resources of the heat pump dryer.

[0116] 2. When the pressure of the heat pump system is too high to meet the cooling demand of the target space, the pressure is reduced by adjusting the opening of the exhaust valve to ensure that the temperature of the low-temperature air meets the cooling demand of the target space, thus improving the applicability of using the heat pump dryer for cooling. Furthermore, by limiting the adjustment method of the actual opening, the adjustment of the actual opening is made more accurate and effective, avoiding over-adjustment and waste of resources. Furthermore, when the heat pump dryer has a cooling demand, the cooling demand of the heat pump dryer is prioritized, and the opening is adjusted to the cooling target opening rather than the high-pressure cooling target opening, which can effectively protect the heat pump dryer.

[0117] 3. When the heat pump system pressure is too low, causing the air to become too cold and affecting the comfort of users in the target space, the actual opening degree can be reduced according to the specified method to ensure the comfort of users in the target space. Furthermore, when the heat pump dryer has a pressure boosting requirement, the pressure boosting requirement of the heat pump dryer should be prioritized. The actual opening degree should be adjusted to the actual opening degree for pressure boosting instead of reducing the opening degree of the heat pump dryer. This can effectively improve the working efficiency of the heat pump dryer and effectively ensure that waste heat is fully recovered.

[0118] 4. When the heat pump dryer just starts running and the pressure of the heat pump system has not yet risen to the rated pressure, reject the cooling request of the heat pump dryer to ensure that the heat pump dryer can quickly reach the rated pressure and ensure the operating efficiency of the heat pump dryer.

[0119] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A method for controlling the cooling fan of a heat pump dryer, characterized in that: The heat pump dryer includes a heat pump system, a drum, a drum fan, a first exhaust duct, a second exhaust duct, an exhaust valve, and a cooling fan. The heat pump system includes a condenser and an evaporator connected by pipes. The condenser is installed on a pipe connected to one end of the drum, and the other end of the drum is connected to the input end of the drum fan. The output end of the drum fan is connected to one end of the first exhaust duct. The evaporator is installed at the other end of the first exhaust duct. One end of the second exhaust duct is fixed to the inner wall of the exhaust port, and the other end of the second exhaust duct is fixed to the exhaust valve. A pressure detection unit is installed on the pipes of the heat pump system. The input end of the cooling fan is connected to the other end of the first exhaust duct, and the output end of the cooling fan is connected to the target space. The control method for the air cooler of the heat pump dryer includes the following steps: Obtain the cooling requirements of the heat pump dryer; If the cooling requirement is yes, the cooling fan is activated to draw the air that has exchanged heat with the evaporator to the target space; If the cooling requirement is not met, the cooling fan stops running, and the air that has exchanged heat with the evaporator is discharged to the outside of the heat pump dryer. Obtain the operating pressure on the evaporator side of the heat pump dryer and the actual opening degree of the exhaust valve; If the operating pressure is higher than the preset high pressure threshold, the actual opening of the exhaust valve is adjusted to the target opening of the exhaust valve according to the first preset condition. The preset high pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 30°C.

2. The method for controlling the cooling fan of a heat pump dryer according to claim 1, characterized in that, The first preset condition is: the target opening degree = (the operating pressure - the preset high pressure threshold) × the valve opening degree adjustment coefficient.

3. The method for controlling the cooling fan of a heat pump dryer according to claim 2, characterized in that, It also includes the following steps: Obtain the target cooling opening degree of the exhaust valve; If the target cooling opening degree exists, the actual opening degree of the exhaust valve will be adjusted to the target cooling opening degree.

4. The method for controlling the cooling fan of a heat pump dryer according to claim 1, characterized in that, If the operating pressure is lower than the preset low pressure threshold, the actual opening of the exhaust valve is adjusted to the target opening of the exhaust valve according to the second preset condition. The preset low-pressure threshold is the pressure on the evaporator side of the heat pump dryer when the temperature of the air after heat exchange with the evaporator is 16°C.

5. The method for controlling the cooling fan of a heat pump dryer according to claim 4, characterized in that, The second preset condition is: the target opening degree = (the preset low pressure threshold - the operating pressure) × the valve opening degree adjustment coefficient.

6. The method for controlling the cooling fan of a heat pump dryer according to claim 4, characterized in that, It also includes the following steps: Obtain the actual opening degree of the exhaust valve during pressure increase; If the actual opening degree of the pressure boost exists, then the actual opening degree of the exhaust valve will be adjusted to the actual opening degree of the pressure boost.

7. The method for controlling the cooling fan of a heat pump dryer according to claim 1, characterized in that, It also includes the following steps: Obtain the operating pressure on the condenser side of the heat pump dryer; If the operating pressure is lower than the rated pressure, change the cooling requirement to "No" and output a low-pressure signal.

8. A computer device for controlling the air cooler of a heat pump dryer, characterized in that, A method for controlling the air cooler of a heat pump dryer as described in any one of claims 1-7, comprising: The signal acquisition module is used to acquire the cooling demand of the heat pump dryer; The cooling demand determination module is used to determine whether there is a cooling demand. The refrigeration fan start / stop module is used to start the refrigeration fan when the cooling demand is met, and to pump the air that has exchanged heat with the evaporator to the target space; when the cooling demand is not met, the refrigeration fan is turned off, and the air that has exchanged heat with the evaporator is discharged to the outside of the heat pump dryer.

9. A heat pump clothes dryer, characterized in that, include: At least one memory and at least one processor; The memory is used to store one or more computer programs, which, when executed by a processor, are used to implement the steps of a heat pump dryer fan control method as described in any one of claims 1-7.

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