Main unit assembly, heat-pump water heater and control method

Abstract

The present application provides a main unit assembly, a heat-pump water heater and a control method. The main unit assembly (200) comprises: a housing (210), provided with an air inlet (211) and an air outlet (212); a heat exchanger (220), provided in the housing (210), an air inlet duct being formed between the air inlet (211) and the heat exchanger (220), and an air outlet duct being formed between the air outlet (212) and the heat exchanger (220); a fan module (230), configured to form an air flow that flows from the air inlet (211) to the air outlet (212) successively through the air inlet duct, the heat exchanger (220) and the air outlet duct; an air pressure measuring apparatus (240), provided in the housing (210) and configured to measure the air pressure P of the air flow; and a control apparatus (250), electrically connected to the air pressure measuring apparatus (240) and the fan module (230) and configured to control the fan module (230) according to P.

Description

Head assembly, heat pump water heater and control method

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on September 27, 2023, with application number 202311271712.2, and invention name "A head assembly, a heat pump water heater and a control method", and the Chinese patent application filed with the Patent Office of China on September 27, 2023, with application number 202322651987.0, and invention name "A head assembly and a heat pump water heater", the contents of which should be understood as being incorporated into this application by reference. Technical Field

[0002] This article relates to but is not limited to electrical equipment technology, in particular to a head assembly, a heat pump water heater and a control method. Background Art

[0003] The heat pump water heater consists of a head assembly, a water tank assembly, and an air duct. The air duct comprises a first air duct and a second air duct. The head assembly is mounted on top of the water tank assembly, and the head assembly houses a fan module and a heat exchanger. The air inlet of the head assembly communicates with the outside world through the first air duct, while the air outlet of the head assembly communicates with the outside world through the second air duct. When the fan module is running, outside air enters the head assembly through the first air duct, exchanges heat with the heat exchanger inside the head assembly, removes the cooling energy from the heat exchanger, and is then discharged back to the outside world through the second air duct.

[0004] On the one hand, the longer the air duct length, the greater the system air volume attenuation at the same fan module speed and the worse the heating performance of the heat pump water heater; on the other hand, in order to prevent dust and other dirt from entering the head assembly, a filter is usually installed at the air inlet. The filter needs to be cleaned or replaced regularly to avoid system air volume attenuation and prevent the heating performance of the heat pump water heater from decreasing.

[0005] Therefore, how to better ensure the heating performance of the heat pump water heater is a technical problem that those skilled in the art urgently need to solve.

[0006] Summary of the Invention

[0007] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0008] The head assembly of the heat pump water heater provided in the present application includes: a shell, provided with an air inlet and an air outlet; a heat exchanger, arranged in the shell, an air inlet duct is formed between the air inlet and the heat exchanger, and an air outlet duct is formed between the air outlet and the heat exchanger; a fan module, configured to form an air beam flowing from the air inlet through the air inlet duct, the heat exchanger and the air outlet duct to the air outlet in sequence; a wind pressure detection device, arranged in the shell and configured to detect the wind pressure P of the air beam; and a control device, electrically connected to the wind pressure detection device and the fan module, and configured to control the fan module according to the P.

[0009] In some exemplary embodiments, the head assembly further includes: an air duct assembly, located outside the shell and arranged at the air inlet, and the air inlet is connected to the outside world through the air duct assembly.

[0010] In some exemplary embodiments, the head assembly further includes: an air duct assembly, located outside the shell and arranged at the air outlet, and the air outlet is connected to the outside world through the air duct assembly.

[0011] In some exemplary embodiments, the air duct assembly includes an air duct and an adapter, the adapter is connected to the housing, and the air duct is connected to the adapter.

[0012] In some exemplary embodiments, the head assembly further includes: a filter element, disposed at the air inlet.

[0013] In some exemplary embodiments, the air inlet is located on the top wall of the shell, the control device is vertically arranged in the air inlet duct, the wind pressure detection device is arranged on the side of the control device facing the heat exchanger, and the pressure port of the wind pressure detection device faces the air inlet.

[0014] In some exemplary embodiments, the fan module includes: a wind box having an air flow duct, located in the shell and between the heat exchanger and the air outlet, the air outlet duct including the air flow duct; a motor and fan blades connected by transmission, and the fan blades are located in the air flow duct.

[0015] In some exemplary embodiments, the air outlet is located on the peripheral wall of the shell, the wind pressure detection device is fixed between the air duct and the air outlet, and the pressure port of the wind pressure detection device faces the outlet of the air duct.

[0016] The heat pump water heater provided in the present application comprises a water tank assembly and a head assembly of the heat pump water heater described in any one of the above embodiments, wherein the head assembly is assembled with the water tank assembly.

[0017] The control method of the heat pump water heater provided in the present application includes: obtaining P, and controlling the fan module according to the P.

[0018] In some exemplary embodiments, the step of controlling the fan module according to the P includes: controlling the fan module to increase the speed according to a first set instruction based on the condition |P| < |first pressure threshold Pl| being satisfied for a first set time period, and then obtaining the wind pressure P of the wind beam again within a second set time period;

[0019] Based on the condition |P|<|Pl| being satisfied for a continuous third set time period and the actual speed Q of the fan module not reaching the first set speed Qh, executing the steps of controlling the motor of the fan module to increase the speed according to the first set instruction, and then obtaining the wind pressure P of the wind beam again after a second set time period;

[0020] Based on the third set time period continuously satisfying |P|<|Pl| and the actual speed Q of the fan module reaching the first set speed Qh, controlling the fan module to operate at Qh;

[0021] The second set time length is greater than or equal to the third set time length.

[0022] In some exemplary embodiments, the motor of the fan module is a DC motor, and the first setting instruction includes increasing the rotation speed of the motor by a first setting value.

[0023] In some exemplary embodiments, the motor of the fan module is an AC motor, and the first setting instruction includes increasing the rotation speed of the motor by one gear.

[0024] In some exemplary embodiments, the step of controlling the fan module according to the P includes: controlling the fan module to reduce the speed according to the second setting instruction based on the condition |P|>|the second pressure threshold Ph| being satisfied for a continuous fourth setting time period, and then obtaining the wind pressure P of the wind beam again within a fifth setting time period;

[0025] Based on the condition |P|>|Ph| being satisfied for a continuous sixth set time period and the actual speed Q of the fan module not reaching the second set speed Ql, executing the step of controlling the fan module to reduce the speed according to the second set instruction, and then obtaining the wind pressure P of the wind beam again within a fifth set time period;

[0026] Based on the continuous sixth set time period satisfying |P|>|Ph|, and the actual speed Q of the fan module reaches the second set speed Ql, controlling the fan module to operate at Ql;

[0027] Wherein, the fifth set time length ≥ the sixth set time length.

[0028] In some exemplary embodiments, the motor of the fan module is a DC motor, and the second setting instruction includes reducing the rotation speed of the motor by a second setting value.

[0029] In some exemplary embodiments, the motor of the fan module is an AC motor, and the second setting instruction includes reducing the rotation speed of the motor by one gear.

[0030] In some exemplary embodiments, after the step of obtaining P and controlling the fan module according to P, the control method further comprises: recording the cumulative time during which the fan module operates at the first set speed Qh;

[0031] Based on the accumulated time reaching the seventh set time, a first alarm message is outputted to prompt the user to clean or replace the filter element.

[0032] In some exemplary embodiments, before the step of obtaining P and controlling the fan module according to P, the control method further includes: obtaining an ambient temperature T;

[0033] Based on the fact that T is lower than the set temperature T1, the motor of the fan module is controlled to run at a third set speed Q3.

[0034] In some exemplary embodiments, before the step of obtaining P and controlling the fan module according to P, the control method further includes: obtaining status information of a wind pressure detection device;

[0035] Based on the fact that the status information is abnormal information, the motor of the fan module is controlled to run at a fourth set speed Q4, and a second alarm message is output.

[0036] The head assembly of the heat pump water heater provided in this application, the wind pressure detection device is arranged in the shell, and is configured to detect the wind pressure P of the wind beam. The control device controls the fan module according to P to ensure that the fan module always runs at the minimum required speed to ensure that the heat exchange performance of the heat exchanger is in the optimal state. This solution has better heating performance of the heat pump water heater.

[0037] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0038] Summary of the Figures

[0039] FIG1 is a schematic diagram of the exploded structure of a heat pump water heater provided by some embodiments of the present application;

[0040] FIG2 is a schematic cross-sectional view of the heat pump water heater shown in FIG1 ;

[0041] FIG3 is a schematic cross-sectional view of a heat pump water heater provided in some other embodiments of the present application;

[0042] FIG4 is a flow chart of a control method for a heat pump water heater provided in some other embodiments of the present application.

[0043] The corresponding relationship between the reference numerals and component names is as follows:

[0044] 100 water tank assembly, 200 head assembly, 210 housing, 211 air inlet, 212 air outlet, 220 heat exchanger, 230 fan module, 231 bellows, 232 motor, 233 fan blade, 240 wind pressure detection device, 250 control device, 260 air duct assembly, 261 air duct, 262 adapter, 270 filter, 280 compressor.

[0045] Details

[0046] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0047] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive solution defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

[0048] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0049] The present application provides a head assembly of a heat pump water heater, which can better ensure the performance of the heat pump water heater.

[0050] The present application also provides a heat pump water heater and a control method for the heat pump water heater.

[0051] The heat pump water heater provided in the present application, as shown in FIG. 1 to FIG. 3 , includes a water tank assembly 100 and a head assembly 200 , and the head assembly 200 is assembled with the water tank assembly 100 . Among them, the head assembly 200 includes: a shell 210, the shell 210 is provided with an air inlet 211 and an air outlet 212; a heat exchanger 220, the heat exchanger 220 is arranged in the shell 210, an air inlet duct is formed between the air inlet 211 and the heat exchanger 220, and an air outlet duct is formed between the air outlet 212 and the heat exchanger 220; a fan module 230, the fan module 230 is configured to form an air beam flowing from the air inlet 211 through the air inlet duct, the heat exchanger 220 and the air outlet duct to the air outlet 212 in sequence; a wind pressure detection device 240, the wind pressure detection device 240 is arranged in the shell 210, and is configured to detect the wind pressure P of the air beam; and a control device 250, the control device 250 is electrically connected to the wind pressure detection device 240 and the fan module 230, and is configured to control the fan module 230 according to P.

[0052] In this heat pump water heater, the wind pressure detection device 240 is disposed within the housing 210 and is configured to detect the wind pressure P of the air beam. The control device 250 controls the fan module 230 based on P to ensure that the fan module 230 always operates at the minimum required speed to ensure the optimal heat exchange performance of the heat exchanger 220. This solution improves the heating performance of the heat pump water heater. The wind pressure detection device 240 is configured as a wind pressure detection sensor.

[0053] In some examples, as shown in Figures 1 to 3, the head assembly 200 also includes: two air duct assemblies 260, both of which are located outside the shell 210 and are respectively arranged at the air inlet 211 and the air outlet 212, the air inlet 211 is connected to the outside world through one air duct assembly 260, and the air outlet 212 is connected to the outside world through another air duct assembly 260.

[0054] In some examples, as shown in FIG. 1 to FIG. 3 , each air duct assembly 260 includes an air duct 261 and an adapter 262 , and the two air ducts 261 are respectively installed at the air inlet 211 and the air outlet 212 through the two adapters 262 .

[0055] In some examples, as shown in Figures 1 to 3, screw holes are provided around the air inlet 211 and the air outlet 212, and the adapter 262 is provided with a through hole. The screws pass through the through holes and are screwed into the screw holes to fix the adapter 262 on the housing 210.

[0056] In some examples, as shown in Figures 1 to 3, the head assembly 200 further includes a filter 270, which is disposed at the air inlet 211 and is configured as a filter. In this solution, the speed of the fan module 230 is adaptively adjusted based on the wind pressure P of the air beam. In other words, the speed of the fan module 230 is adaptively adjusted based on the blockage of the filter 270 and the actual installation length of the air duct 261. This ensures that the fan module 230 always maintains the minimum required speed to ensure the optimal heat exchange performance of the heat exchanger 220, thereby improving the heating performance of the heat pump water heater.

[0057] In some examples, as shown in Figures 1 to 3, the fan module 230 includes: a bellows 231 having an air flow duct, the bellows 231 is located in the shell 210 and between the heat exchanger 220 and the air outlet 212, and the air outlet duct includes an air flow duct; a transmission-connected motor 232 and fan blades 233, the motor 232 is fixed on the bellows 231 or the shell 210, the fan blades 233 are located in the air flow duct, and the motor 232 drives the fan blades 233 to rotate, forming a wind beam that flows from the air inlet 211 through the air inlet duct, the heat exchanger 220 and the air outlet duct to the air outlet 212 in sequence.

[0058] In some examples, as shown in FIG3 , the head assembly 200 further includes a compressor 280 , which is vertically disposed in the air inlet duct.

[0059] In some embodiments, as shown in Figures 1 and 2, the air inlet 211 is located on the top wall of the shell 210 and is provided with an air inlet grille. The control device 250 is vertically arranged in the air inlet duct. The wind pressure detection device 240 is arranged on the side of the control device 250 facing the heat exchanger 220, and the pressure port of the wind pressure detection device 240 faces the air inlet 211. In this scheme, the wind pressure detected by the wind pressure detection device 240 is negative pressure, and P is less than 0.

[0060] In other embodiments, as shown in FIG3 , the air outlet 212 is located on the peripheral wall of the housing 210 and is provided with an air outlet grille. The wind pressure detection device 240 is fixedly mounted between the air duct and the air outlet 212 , with the pressure port of the wind pressure detection device 240 facing the outlet of the air duct. In this embodiment, the wind pressure detected by the wind pressure detection device 240 is a positive pressure, where P>0. Alternatively, the wind pressure detection device 240 may be fixed at the outlet of the air duct, for example, at the lower edge of the outlet of the air duct.

[0061] The control method of the heat pump water heater provided in the present application, as shown in FIG4 , includes: obtaining P, and controlling the fan module 230 according to P.

[0062] In this control method, the wind pressure detection device 240 detects the wind pressure P of the wind beam, the control device 250 obtains P, and controls the fan module 230 according to P, so that the fan module 230 always ensures that the heat exchange performance of the heat exchanger 220 is in the optimal state at the minimum required speed. This solution has better heating performance of the heat pump water heater.

[0063] Among them, when |Pl|≤|P|≤|Ph|, the heat exchange performance of the heat exchanger 220 is optimal, the heating performance of the heat pump water heater is the best, and the operating energy efficiency is the highest.

[0064] In some examples, as shown in FIG4 , the step of controlling the fan module 230 according to P includes: controlling the fan module 230 to increase the speed according to the first set instruction based on the condition |P| < |first pressure threshold Pl| being satisfied for a first set time period, and then obtaining the wind pressure P of the wind beam again within a second set time period;

[0065] Based on the condition |P|<|Pl| being satisfied for a continuous third set time period and the actual speed Q of the fan module 230 not reaching the first set speed Qh, the steps of controlling the motor 232 of the fan module 230 to increase the speed according to the first set instruction and then obtaining the wind pressure P of the wind beam again after the second set time period are executed;

[0066] Based on the third set time period continuously satisfying |P|<|Pl|, and the actual speed Q of the fan module 230 reaches the first set speed Qh, the fan module 230 is controlled to operate at Qh;

[0067] Among them, the second set time length ≥ the third set time length.

[0068] This solution can ensure that the fan module 230 always runs at the minimum required speed to ensure that the heat exchange performance of the heat exchanger 220 is in an optimal state.

[0069] The first set time length may be set to 3 minutes; or the first set time length may be set to 5 minutes; or the first set time length may be set to 8 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0070] The second set time length can be set to 5 minutes; or the second set time length can be set to 10 minutes; or the second set time length can be set to 15 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design idea of ​​this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0071] The third setting time length can be set to 3 minutes; or the third setting time length can be set to 5 minutes; or the third setting time length can be set to 8 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0072] Alternatively, the motor 232 of the fan module 230 may be a DC motor (e.g., a brushless DC motor), and the first setting instruction may be to increase the speed of the motor 232 by a first setting value. Alternatively, the first setting value may be set to 30 rpm, 50 rpm, or 80 rpm, etc., all of which can achieve the purpose of the present application. Such principles do not deviate from the design concept of the present application and are not further described here. All of such principles should fall within the scope of protection of the present application.

[0073] Alternatively, the motor 232 of the fan module 230 may be an AC motor, and the first setting instruction may be to increase the rotation speed of the motor 232 by one gear.

[0074] In some examples, as shown in FIG4 , the step of controlling the fan module 230 according to P includes: controlling the fan module 230 to reduce the speed according to the second setting instruction based on the condition |P|>|the second pressure threshold Ph| being satisfied for a continuous fourth setting time period, and then obtaining the wind pressure P of the wind beam again within a fifth setting time period;

[0075] If |P|>|Ph| is satisfied for a continuous sixth set time period and the actual speed Q of the fan module 230 does not reach the second set speed Ql, the fan module 230 is controlled to reduce its speed according to the second set instruction, and then the wind pressure P of the wind beam is obtained again within a fifth set time period.

[0076] Based on the sixth set time period satisfying |P|>|Ph| and the actual speed Q of the fan module 230 reaching the second set speed Q1, the fan module 230 is controlled to operate at Q1;

[0077] Among them, the fifth set time length ≥ the sixth set time length.

[0078] This solution can ensure that the fan module 230 always runs at the minimum required speed to ensure that the heat exchange performance of the heat exchanger 220 is in an optimal state.

[0079] The fourth setting time length may be set to 3 minutes; or the fourth setting time length may be set to 5 minutes; or the fourth setting time length may be set to 8 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0080] The fifth setting time length may be set to 5 minutes; or the fifth setting time length may be set to 10 minutes; or the fifth setting time length may be set to 15 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design concept of this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0081] The sixth setting time length may be set to 3 minutes; or the sixth setting time length may be set to 5 minutes; or the sixth setting time length may be set to 8 minutes, etc.; all of the above can achieve the purpose of this application, and its purpose does not deviate from the design idea of ​​this application, and will not be repeated here, and should all fall within the scope of protection of this application.

[0082] In some examples, the first set time length, the third set time length, the fourth set time length, and the sixth set time length are set to be equal, and the second set time length and the fifth set time length are set to be equal.

[0083] Alternatively, the motor 232 of the fan module 230 may be a DC motor (e.g., a brushless DC motor), and the second setting instruction may be to reduce the speed of the motor 232 by a second setting value. Alternatively, the second setting value may be set to 30 rpm, 50 rpm, or 80 rpm, etc., all of which can achieve the purpose of this application. Such settings do not deviate from the design principles of this application and are not further described here. Such settings should all fall within the scope of protection of this application. In some examples, the first setting value and the second setting value are set equal.

[0084] Alternatively, the motor 232 of the fan module 230 may be an AC motor, and the second setting instruction may be to reduce the rotation speed of the motor 232 by one gear.

[0085] In some examples, as shown in FIG4 , after the step of obtaining P and controlling the fan module 230 according to P, the control method further includes: recording the cumulative time that the fan module 230 operates at the first set speed Qh;

[0086] When the accumulated time reaches the seventh set time, a first alarm message is output to prompt the user to clean or replace the filter 270. The user cleans or replaces the filter 270 in accordance with the first alarm message. The user can manually cancel the first alarm message. After the first alarm message is canceled, the accumulated time that the fan module 230 has been operating at the first set speed Qh is cleared (i.e., reset to zero).

[0087] In some examples, as shown in FIG4 , before the step of obtaining P and controlling the fan module 230 according to P, the control method further includes: obtaining the ambient temperature T;

[0088] Since T is lower than the set temperature T1 , the motor 232 of the fan module 230 is controlled to run at a third set speed Q3 (or the motor 232 may be controlled to stop running, etc.) to prevent the heat exchanger 220 from frosting.

[0089] In some examples, before the step of obtaining P and controlling the fan module 230 according to P, the control method further includes: obtaining status information of the wind pressure detection device 240;

[0090] Based on the abnormal status information, the motor 232 of the fan module 230 is controlled to run at the fourth set speed Q4 and output a second alarm message to inform the user that the wind pressure detection device 240 is damaged. The fourth set speed Q4 may be the initial preset speed of the motor 232.

[0091] In some examples, before the step of obtaining P and controlling the fan module 230 according to P, the control method further includes: controlling the motor 232 of the fan module 230 to operate at an initial preset speed.

[0092] As shown in FIG4 , a control method for a heat pump water heater includes:

[0093] Controlling the motor 232 to run at an initial preset speed;

[0094] Obtaining status information of the wind pressure detection device 240;

[0095] Based on the status information being abnormal information, the motor 232 is controlled to run at the fourth set speed Q4 and a second alarm message is output;

[0096] Based on the status information being normal information, the ambient temperature T is obtained, and it is determined whether the first determination condition T<T1 is satisfied;

[0097] Based on the first determination condition being met, the motor 232 is controlled to run at the third set speed Q3, and then the steps of obtaining the ambient temperature T and determining whether the first determination condition T<T1 is met are performed;

[0098] If the first determination condition is not met, P is obtained, and it is determined whether the second determination condition |P|<|Pl| is met for a first set time period;

[0099] Based on the second determination condition being met, the motor 232 is controlled to increase its speed according to the first set instruction, and then the wind pressure P of the wind beam is obtained again within the second set time period, and it is determined whether the third determination condition is met for the third set time period: |P| < |Pl|, and the actual speed Q of the motor 232 does not reach the first set speed Qh.

[0100] Based on the third determination condition being met, the steps of controlling the motor 232 to increase the speed according to the first set instruction, then obtaining the wind pressure P of the wind beam again after the second set time, and determining whether the third determination condition is met for the third set time period: |P| < |Pl|, and the actual speed Q of the motor 232 does not reach the first set speed Qh;

[0101] If the third determination condition is not satisfied, it is determined whether the fourth determination condition is satisfied for a third set time period, namely, |P|<|Pl|, and the actual speed Q of the motor 232 reaches the first set speed Qh.

[0102] Based on the fourth determination condition being met, the motor 232 is controlled to operate at Qh, and then the accumulated time t during which the motor 232 operates at the first set speed Qh is recorded, and it is determined whether the fifth determination condition t < the seventh set time t1 is met;

[0103] Based on the fifth determination condition being met, the step of obtaining status information of the wind pressure detection device 240 is executed;

[0104] If the fifth determination condition is not met, outputting a first alarm message;

[0105] If the fourth determination condition is not met, the step of obtaining status information of the wind pressure detection device 240 is performed;

[0106] If the second determination condition is not satisfied, then determining whether the sixth determination condition, namely, |P|>|Ph|, is satisfied for a fourth set time period;

[0107] If the sixth determination condition is not satisfied, the step of obtaining status information of the wind pressure detection device 240 is performed;

[0108] Based on the sixth determination condition being met, the motor 232 is controlled to reduce its speed according to the second set instruction, and then the wind pressure P of the wind beam is obtained again within the fifth set time period, and it is determined whether the seventh determination condition is met for the sixth set time period: |P|>|Ph|, and the actual speed Q of the motor 232 does not reach the second set speed Ql.

[0109] Based on the seventh determination condition being met, the steps of controlling the motor 232 to reduce its speed according to the second setting instruction, then obtaining the wind pressure P of the wind beam again within the fifth setting time, and determining whether the seventh determination condition is met for the sixth setting time: |P|>|Ph|, and the actual speed Q of the motor 232 does not reach the second setting speed Ql is met;

[0110] If the seventh determination condition is not met, it is determined whether the eighth determination condition is met for the sixth set time period, namely, |P|>|Ph|, and the actual speed Q of the motor 232 reaches the second set speed Q1.

[0111] Based on the eighth determination condition being met, the motor 232 is controlled to operate according to Q1, and then the step of obtaining the status information of the wind pressure detection device 240 is executed;

[0112] Based on the fact that the eighth determination condition is not satisfied, the step of acquiring the status information of the wind pressure detection device 240 is executed.

[0113] To sum up, in the heat pump water heater provided in the present application, the wind pressure detection device is arranged in the shell and is configured to detect the wind pressure P of the wind beam. The control device controls the fan module according to P to ensure that the fan module always runs at the minimum required speed to ensure that the heat exchange performance of the heat exchanger is in the optimal state. This scheme has better heating performance of the heat pump water heater.

[0114] In the description of this application, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", ""mouth"-shaped structure", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0115] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection. The terms "installation", "connection", and "fixed connection" can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0116] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable, and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A head assembly of a heat pump water heater, comprising: A housing, provided with an air inlet and an air outlet; A heat exchanger is disposed in the housing, an air inlet duct is formed between the air inlet and the heat exchanger, and an air outlet duct is formed between the air outlet and the heat exchanger; A fan module, configured to form a wind beam that flows from the air inlet to the air outlet through the air inlet duct, the heat exchanger and the air outlet duct in sequence; A wind pressure detection device, disposed in the housing and configured to detect the wind pressure P of the wind beam; and The control device is electrically connected to the wind pressure detection device and the fan module, and is configured to control the fan module according to the P.

2. The head assembly according to claim 1, further comprising: The air duct assembly is located outside the shell and is arranged at the air inlet. The air inlet is connected to the outside through the air duct assembly.

3. The head assembly according to claim 1, further comprising: The air duct assembly is located outside the shell and is arranged at the air outlet. The air outlet is connected to the outside through the air duct assembly.

4. The head assembly according to claim 2 or 3, wherein: The air duct assembly comprises an air duct and an adapter, the adapter is connected to the shell, and the air duct is connected to the adapter.

5. The head assembly according to claim 1, further comprising: The filter element is arranged at the air inlet.

6. The head assembly according to claim 1, wherein: The air inlet is located on the top wall of the shell, the control device is vertically arranged in the air inlet duct, the wind pressure detection device is arranged on a side of the control device facing the heat exchanger, and the pressure port of the wind pressure detection device faces the air inlet.

7. The head assembly according to claim 1, wherein: The fan module comprises: A wind box having an air passage, located in the housing and between the heat exchanger and the air outlet, wherein the air outlet duct includes the air passage; The motor and the fan blade are transmission-connected, and the fan blade is located in the air duct.

8. The head assembly according to claim 7, wherein: The air outlet is located on the peripheral wall of the shell, the wind pressure detection device is fixedly arranged between the wind passage and the air outlet, and the pressure taking port of the wind pressure detection device faces the outlet of the wind passage.

9. A heat pump water heater, comprising a water tank assembly and a head assembly of the heat pump water heater according to any one of claims 1 to 8, wherein the head assembly is assembled with the water tank assembly.

10. A control method for a heat pump water heater according to claim 9, comprising: Obtain P, and control the fan module according to the P.

11. The control method according to claim 10, wherein: The step of controlling the fan module according to the P comprises: Based on the continuous first set time period satisfying |P|<|first pressure threshold Pl|, the fan module is controlled to follow the first set A fixed instruction is used to increase the speed, and then the wind pressure P of the wind beam is obtained again within a second set time period; Based on the continuous third set time period satisfying |P|<|Pl| and the actual speed Q of the fan module not reaching the first set speed Qh, the step of controlling the motor of the fan module to increase the speed according to the first set instruction is executed, and then the step of obtaining the wind pressure P of the wind beam again after the second set time period is executed; Based on the third set time period satisfying |P|<|Pl| and the actual rotation speed Q of the fan module reaching the first set rotation speed Qh, controlling the fan module to operate at Qh; Among them, the second set time length ≥ the third set time length.

12. The control method according to claim 11, wherein: The motor of the fan module is a DC motor, and the first setting instruction includes increasing the rotation speed of the motor by a first setting value.

13. The control method according to claim 11, wherein: The motor of the fan module is an AC motor, and the first setting instruction includes increasing the rotation speed of the motor by one gear.

14. The control method according to claim 10, wherein: The step of controlling the fan module according to the P comprises: Based on the continuous fourth set time period satisfying |P|>|second pressure threshold Ph|, controlling the fan module to reduce the speed according to the second set instruction, and then obtaining the wind pressure P of the wind beam again within the fifth set time period; Based on the continuous sixth set time period satisfying |P|>|Ph| and the actual rotation speed Q of the fan module not reaching the second set rotation speed Ql, the fan module is controlled to reduce the rotation speed according to the second set instruction, and then the wind pressure P of the wind beam is obtained again within the fifth set time period; Based on the sixth set time period satisfying |P|>|Ph| and the actual rotation speed Q of the fan module reaching the second set rotation speed Ql, controlling the fan module to operate at Ql; Among them, the fifth set time length ≥ the sixth set time length.

15. The control method according to claim 14, wherein: The motor of the fan module is a DC motor, and the second setting instruction includes reducing the rotation speed of the motor by a second setting value.

16. The control method according to claim 14, wherein: The motor of the fan module is an AC motor, and the second setting instruction includes reducing the rotation speed of the motor by one gear.

17. The control method according to any one of claims 10 to 16, wherein: After the step of obtaining P and controlling the fan module according to the P, the control method further includes: Recording the cumulative time that the fan module runs at the first set speed Qh; Based on the accumulated time reaching the seventh set time, a first alarm message is outputted to prompt the user to clean or replace the filter element.

18. The control method according to claim 10, wherein: Before the step of obtaining P and controlling the fan module according to the P, the control method further includes: Get the ambient temperature T; Based on the fact that T is lower than the set temperature T1, the motor of the fan module is controlled to run at a third set speed Q3.

19. The control method according to claim 10, wherein: Before the step of obtaining P and controlling the fan module according to the P, the control method further includes: Obtain status information of the wind pressure detection device; Based on the state information being abnormal information, the motor of the fan module is controlled to run at a fourth set speed Q4, And output the second alarm information.

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