Method and apparatus for cleaning a rotary wheel heat exchanger

Abstract

The application discloses a cleaning device and method for a rotating wheel type heat exchanger. The cleaning method comprises the following steps: S1: according to the size of the heat storage wheel to be cleaned and the size of the hole, parameters are configured, the parameters at least including a delay trigger cleaning time T0, a pressure difference trigger value P0 and a waterway nozzle cleaning diameter L1; S2: in the automatic mode, a pressure difference meter is used to read a measurement value P1; S3: whether the measurement value P1 reaches the pressure difference trigger value P0 is judged, if not, returning to the step S2; if yes, entering the next step; S5: reading data; S6: executing a "cleaning mode" until completion. The application can realize periodic automatic cleaning, ensure the cleaning effect, save water resources and shorten the cleaning time.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of rotary heat exchanger cleaning method, also relates to the cleaning device of corresponding rotary heat exchanger, belong to heat exchanger technical field. BACKGROUND

[0002] Rotary heat exchanger is composed of shell, heat storage wheel (also known as rotary wheel), power mechanism, sealing element and the like. Among them, heat storage wheel is usually disc-shaped and honeycomb-shaped, and under the action of power mechanism, it continuously rotates to continuously transfer heat and moisture in exhaust air to fresh air. The heat storage wheel needs to be closed and installed in air conditioning unit for use. With the long-term operation of air conditioning unit, the air passage of heat storage wheel may be blocked, and needs to be cleaned regularly. However, the heat storage wheel of rotary heat exchanger is usually a large circular cylinder, with a weight of more than 500 kg and a diameter of more than 6 meters. Once installed at the user's use site, it is not suitable for disassembly and cleaning. Therefore, it is necessary to rotate while cleaning the large number of holes distributed thereon.

[0003] Usually, the cleaning device adopts water cleaning or gas cleaning method when cleaning the holes of the heat storage wheel. Since the heat storage wheel is a circular cylinder, the cleaning device needs to complete the cleaning process when the heat storage wheel rotates one circle. Therefore, the conventional cleaning device cannot clean every hole of the heat storage wheel completely. In order to clean every hole completely, the heat storage wheel needs to rotate multiple times, which undoubtedly wastes water and energy, and reduces the cleaning efficiency, thereby increasing the cleaning cost.

[0004] In Chinese Utility Model No. ZL 201320004025. X, a cleaning device for cleaning the rotary wheel in a total heat exchanger is disclosed, which includes a mechanical part and a control part. The mechanical part includes a cleaning part fixed to the side surface of the rotary wheel and a power mechanism for driving the rotary wheel to rotate. The cleaning part includes one or more spray heads arranged on the side surface of the cleaning part and a stroke mechanism for driving the spray heads to move linearly and reciprocally. The cleaning device realizes the cleaning of the rotary wheel through the rotation of the rotary wheel and the linear and reciprocal movement of the spray heads. The cleaning device can be used for individual cleaning of the rotary wheel, and can also be directly installed at the installation site of the air exchange device according to the use requirement, to clean the rotary wheel regularly during the use of the air exchange device. SUMMARY

[0005] The primary technical problem to be solved by the present application is to provide a cleaning method for a rotary heat exchanger.

[0006] Another technical problem to be solved by the present application is to provide a cleaning device for a rotary heat exchanger.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] According to a first aspect of the embodiments of the present application, a cleaning method of a rotary heat exchanger is provided, comprising the following steps:

[0009] S1: configuring parameters according to the size of the heat storage wheel to be cleaned and the size of the channel, the parameters at least including a delay trigger cleaning time T0, a pressure difference trigger value P0, and a waterway nozzle cleaning diameter L1;

[0010] S2: reading a wind pressure measurement value P1 in an automatic mode;

[0011] S3: determining whether the wind pressure measurement value P1 reaches the pressure difference trigger value P0, if not, returning to step S2; if yes, proceeding to the next step;

[0012] S5: reading the parameters set in step S1;

[0013] S6: executing a "cleaning mode" until completion.

[0014] Preferably, the step S6 comprises the following sub-steps:

[0015] S61: determining whether the nozzle position is at the original point;

[0016] S62: the compressor starts cleaning according to the gear matched with the position;

[0017] S63: the displacement module stops, the driving motor reverses, and the nozzle moves towards the original point;

[0018] S64: executing the [B X ]-[C X ]-[Q X ] logic in reverse, and then determining whether the original position signal is received through the nozzle position, if not, repeating this step; if yes, jumping to step S65;

[0019] S65: the displacement module motor stops, and the nozzle cleaning module compressor stops.

[0020] Preferably, the cleaning method further comprises the following steps:

[0021] S620: starting cleaning according to the corresponding gear and flow, and the displacement module motor rotates forward, so that the nozzle moves towards the end point;

[0022] S621: determining the nozzle position and determining whether the gear and the position interval are matched;

[0023] S622: determining whether the end position signal is received, if yes, proceeding to step 63; if not, returning to step S621.

[0024] Preferably, in step S1, a split radius is set, between which and the original position is a fast zone, and between which and the last position is a slow zone.

[0025] Preferably, in step S2, the current time T1 is read by a timer,

[0026] Between step S3 and step S5, step S4 is further included, that is, whether the timer time T1 is greater than or equal to T0, if not, return to step S2; if yes, enter step S5.

[0027] Preferably, the slow zone includes a plurality of slow sub-zones, and the gear and flow rate of each slow sub-zone are different;

[0028] The fast zone includes a plurality of fast sub-zones, and the gear and flow rate of each fast sub-zone are different.

[0029] Preferably, the gear is the motor power required for the nozzle to move a step distance Bx within a time βT / N assuming that the nozzle moves at a uniform speed within the length of each slow sub-zone or fast sub-zone,

[0030] Wherein, T is the time required for the heat storage wheel to rotate 360 degrees; N is the number of channels at the maximum radius of the slow zone or the fast zone; and the coefficient β is the reciprocal of the number of slow sub-zones.

[0031] Preferably, in step S621, the position of the nozzle is detected, and it is determined whether the nozzle is in the position interval [B X ], if the nozzle is in the position interval [B X ], the cleaning is performed according to the gear and flow rate corresponding to [B X ], if the nozzle is not in the position interval [B X ], the step is returned to step S620.

[0032] Preferably, it is determined whether the last position signal is received, if yes, step S63 is entered; if not, step S621 is returned.

[0033] According to a second aspect of the embodiment of the present application, a cleaning device of a rotary heat exchanger is provided, which includes a frame, a heat storage wheel, a motor, a track, a nozzle, a hose and a control circuit; wherein,

[0034] The heat storage wheel is a circular column body, which is installed in the frame, and includes a plurality of channels;

[0035] The track is installed along the radial support of the frame, and sensors are arranged at the original position and the last position of the track;

[0036] The spray head is connected with the hose, and the spray head is slidably fixed on the track to spray the gas or liquid from the hose to the hole;

[0037] The motor is used to control the movement of the spray head;

[0038] The control circuit controls the motor to operate to perform the cleaning method of the rotary heat exchanger as described above.

[0039] Compared with the prior art, the cleaning device provided by the present application installs a sensor in the air duct. When the air pressure is detected to be low, the cleaning device starts and stops automatically to work, without the need for personnel to periodically check and then manually control the start / stop of the cleaning device. By controlling the running speed of the spray head, all the holes in the heat storage wheel can be cleaned at one time. The present application utilizes the combination of the circumferential rotation of the heat storage wheel and the radial movement of the spray head to automatically clean each hole in the heat storage wheel. Moreover, according to the hole diameter and the heat storage wheel diameter, the rotation speed of the heat storage wheel and the movement speed of the spray head can be adjusted by adjusting the motor power, so as to adapt to the cleaning of heat storage wheels of different sizes of different air conditioning machines. Therefore, the present application can improve the cleaning quality and efficiency of the heat storage wheel, reduce the labor intensity, and reduce the maintenance cost of the fresh air system. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The present application is an embodiment of a cleaning device for a rotary heat exchanger, and a structure diagram thereof is shown in the figure.

[0041] Figure 2 The present application is an embodiment of a cleaning method for a rotary heat exchanger, and a flowchart thereof is shown in the figure.

[0042] Figure 3 The present application is an embodiment of a cleaning method for a rotary heat exchanger, and a flowchart thereof is shown in the figure. Figure 2

[0043] Figure 4 The present application is an embodiment of a cleaning method for a rotary heat exchanger, and a flowchart thereof is shown in the figure. DETAILED DESCRIPTION

[0044] The technical content of the present application will be described in detail below in combination with the drawings and specific embodiments.

[0045] As shown in Figure 1 and Figure 2 The present application provides a cleaning device for a rotary heat exchanger, which comprises a frame 1, a heat storage wheel 2, a motor 3, a track 4, a spray head 5, a hose 6, and a control circuit 8.

[0046] ​The heat accumulating wheel 2 is a circular cylinder and is installed in the frame 1. The heat accumulating wheel 2 comprises a plurality of channels 21, each of which has substantially the same size. The frame 1 comprises an outer frame 11 and radial supports 12. One end of the radial supports 12 is fixed to the center of the heat accumulating wheel 2 and the other end is fixed to the outer frame 11. In one embodiment of the present application, the frame 1 is a rectangular cylinder and the radial supports 12 are horizontal supports in a cross-shaped support. The motor 3 is fixed to the outside of the outer frame 11 and does not interfere with the rotation of the heat accumulating wheel 2.

[0047] The track 4 is installed along the radial supports 12, so in one embodiment of the present application, the track 4 extends horizontally. The original position and the final position of the track 4 are provided with limit blocks or sensors 41. When the nozzle 5 reaches the original position or the final position, it is detected by the limit blocks or sensors 41 and a control circuit 8 is sent, so that the current position of the nozzle 5 is known. The frame 1 of the heat accumulating wheel is a ring structure and the heat accumulating wheel 2 is also a circular cylinder. The intersection of the inner ring radius r of the heat accumulating wheel 2 and the track 4 arranged along the radial direction of the heat accumulating wheel is the original position; the intersection of the outer ring radius R of the heat accumulating wheel 2 and the track 4 is the final position.

[0048] The hose 6 extends from the outer frame 11 along the radial supports 12 to the center of the heat accumulating wheel 2 and is exposed. The hose 6 can be moved in the horizontal direction along the track 4 under the control of the motor. The nozzle 5 is fixed at the distal end of the hose 6, is exposed from the track 4, and faces the heat accumulating wheel 2. The diameter of the nozzle 5 is designed to be suitable for the size of the plurality of channels 21, so that the nozzle 5 can completely clean the inner wall of the plurality of channels at the same time without missing local areas.

[0049] When the air pressure is detected to be low by the sensor installed in the air duct of the heat exchanger, the corresponding control circuit 8 controls the motor 3 to operate, thereby automatically starting the cleaning work. Therefore, it is not necessary for personnel to periodically check and then manually control the start / stop of the cleaning work.

[0050] In addition, the running speed of the cleaning device of the rotating wheel type heat exchanger provided in the embodiments of the present application is adjusted by logic control such as FPGA, and all the holes in the heat accumulating wheel can be completely cleaned at one time by adjusting the running speed.

[0051] Next, the cleaning method of the rotating wheel type heat exchanger provided in the embodiments of the present application is described in detail, which comprises the following steps.

[0052] S1: configuring parameters according to the size of the heat accumulating wheel to be cleaned and the size of the channels.

[0053] According to the working condition of the heat accumulating wheel 2, the "delay trigger cleaning time T0" in the automatic mode is set; according to the expected working pressure difference, the "pressure difference trigger value P0" in the automatic mode is set; according to the size of the channels of the heat accumulating wheel 2, the "waterway nozzle cleaning diameter L1" is set, and then the step S2 is jumped to.

[0054] Wherein, the delay trigger cleaning time T0 can be set according to the working condition, which is an empirical value, for example, 3 months, 6 months. The pressure difference trigger value P0 is a preset value set according to the need; the waterway nozzle cleaning diameter L1 is greater than or equal to the size of the hole.

[0055] It should be noted that, as Figure 2 shown, the present application can also adopt a manual mode, which has a similar operation mode as the automatic mode, and will not be described here.

[0056] S2: In the automatic mode, read the air pressure measurement value P1, and read the current time T1 by using the timer.

[0057] The air pressure measurement value P1 can be obtained by using the differential pressure meter installed in the air duct.

[0058] S3: Determine whether the measurement value P1 reaches the pressure difference trigger value P0, if not, go to the next step to determine whether the delay trigger condition is reached; if the pressure difference trigger condition is reached, jump to step S5.

[0059] The pressure difference trigger condition is that the measurement value P1 is greater than or equal to the pressure difference trigger value P0. Specifically, by reading the air pressure measurement value P1 by the differential pressure meter, and determining whether the air pressure measurement value P1 is greater than or equal to the pressure difference trigger value P0, that is, determining whether the difference between the current pressure difference value detected by the sensor and the working pressure difference is within the preset threshold, if it exceeds the threshold, the cleaning work is triggered; if it does not exceed, it is not started. Because the pressure difference becomes larger, it means that the hole is seriously blocked, and the cleaning should be started when the pressure difference trigger value P0 is exceeded.

[0060] S4: Determine whether the timer time T1 is greater than or equal to T0, if not, return to step S2; if yes, go to step S5;

[0061] Read the value T1 by the timer to determine whether the timer time T1 is greater than or equal to T0 to trigger the delay.

[0062] Through steps S3 and S4, the pressure difference trigger can be performed first, and the delay trigger is performed only if the pressure difference trigger condition is not met. Such a design can automatically start the cleaning work in time according to the phenomenon of pressure increase (the more serious the hole blockage, the greater the pressure difference); and in the case of less serious hole blockage, the automatic cleaning can also be started regularly. Thus, the automatic cleaning without manual operation is realized.

[0063] Of course, those skilled in the art can understand that step S4 can be omitted, that is, only the pressure difference trigger mode is used, and the delay trigger mode is not used.

[0064] S5: Read the parameters set in step S1.

[0065] read the measured value of the in-situ point, the end point, and / or the displacement sensor on the displacement module to obtain the position of the nozzle, read the parameters set in the "cleaning mode", and then jump to S6;

[0066] S6: execute the "cleaning mode" until completion. The pre-set cleaning mode is divided into single-pass cleaning (single-pass gas cleaning + single-pass water cleaning) and three-pass reciprocating cleaning (reciprocating gas cleaning + reciprocating water cleaning + reciprocating gas cleaning). The delay trigger cleaning time includes three months, six months, nine months, twelve months, and fifteen months. Details will be described below.

[0067] More preferably, after step S6, the cleaning is completed and step S7 is entered.

[0068] S7: reset the timer in the case of delay trigger.

[0069] Determine whether it is "delay trigger". If yes, reset the "delay trigger" time and the timer is zeroed, and then return to step S2; if no (i.e. in the case of pressure difference trigger), directly return to step S2.

[0070] The above steps achieve cleaning triggered by pressure difference or periodic cleaning. The cleaning step S6 is described in detail below, which further includes the following sub-steps.

[0071] S61: determine whether the nozzle position is at the in-situ point.

[0072] As shown in Figure 3 and Figure 4 , detect the distance between the nozzle and the in-situ point, determine whether the nozzle is at the in-situ point, if not, perform the reset action; if yes, go to step S62.

[0073] As shown in Figure 4 , the in-situ point is the starting position of the cleaning work; the end point is the end position of the cleaning work. The distance between the in-situ point and the end point is determined according to the specific size and channel distribution of the heat storage wheel 2 to be cleaned.

[0074] The reset action refers to the control circuit 8 reversing the motor, so that the nozzle retreats back to the in-situ point, and the position sensor is used to detect that the nozzle has reached the in-situ point, that is, the control circuit 8 receives the in-situ signal from the position sensor, indicating that the reset action is completed. Then, the control circuit 8 controls the motor to rotate forward to drive the nozzle to move to 1 / 2L1 distance (i.e. L1 is the cleaning diameter of the nozzle, that is, the diameter of the coverage range of the gas or liquid sprayed by the nozzle), and then enter step S62.

[0075] S62: the compressor starts cleaning according to the gear matching the position

[0076] Since either air washing or liquid washing can be used, hose 6 is connected to an air pump or a hydraulic pump accordingly. Air washing will be used as an example here.

[0077] like Figure 3 As shown, the air circuit valve is opened, the compressor starts, and cleaning is performed according to flow rate Q2. During the cleaning process, the nozzle position is checked to see if the last position signal is received. If no last position signal is received, proceed to step S621; if a signal is received, proceed to step S63.

[0078] In one embodiment of the present invention, the cleaning area can be divided into a fast zone and a slow zone. That is, a dividing radius is set between the origin and the end point. Channels within the region less than or equal to the dividing radius have a relatively slow linear velocity, thus requiring slow cleaning; channels within the region greater than the dividing radius have a relatively fast linear velocity, thus requiring fast cleaning. Cleaning begins in the fast zone. This design allows the fast zone to enter the cleaning process first during rotation, while the slow zone's rotation range is relatively small. Therefore, when the nozzle reaches the slow zone, even if the channels in the slow zone have deviated from their track position, they are still within the nozzle's cleaning diameter and can be effectively cleaned. The dividing radius can be set in step S1 according to the size of the heat storage wheel, or it can be a default value, such as half the distance between the origin and the end point (i.e., the slow and fast zones are of equal length), or one-third of the distance between the origin and the end point as the slow zone and two-thirds as the fast zone.

[0079] According to the specifications of standard thermal storage wheels on the market, the radius is usually between 500 and 5000 mm. Therefore, in one embodiment of the present invention, the dividing radius is set to 2500 mm. As shown in Table 1 below, in the slow speed zone (i.e., the area with a radius less than 2500 mm), it is divided into 5 slow speed sub-zones by 500 mm, namely 0-500 (i.e., "0≤[Bx]≤500" in the table); 500-1000...2000-2500, a total of 5 slow speed sub-zones. Corresponding to each slow speed sub-zone, a motor power level Cx and a flow rate Qx are preset. For example, when 0≤[Bx]≤500, the corresponding level is C. 11 And the corresponding traffic is Q. 11 .

[0080] The setting of the gear Cx is the motor power required for the nozzle to move at a uniform speed within the length of each slow sub-zone or fast sub-zone, so that the nozzle moves a step distance Bx (500 mm in this example) within a time βT / N. In one embodiment of the present application, β is 1 / 5 (because there are 5 slow sub-zones). Here, T is the time required for the heat storage wheel to rotate 360 degrees; N is the number of channels at the maximum radius of the slow zone or fast zone; and the coefficient β is the reciprocal of the number of slow sub-zones. Specifically, the N value of the slow zone is the number of channels at the divided radius, and the N value of the fast zone is the radius at the original position (the maximum radius of the heat storage wheel).

[0081] Table 1: Slow sub-zone and corresponding gear and flow

[0082] [[B X ] interval]] <![CDATA[[C X Gear shift [[Q X ]flow]] [0 ≤ [B X ] < 500 C11 Q11 500≤[B X ]<1000]] C12 Q12 1000≤[B X ]<1500 C13 Q13 1500≤[B X ]<2000]] C14 Q14 [CD AT 2000 ≤ [B X ] < 2500 C15 Q15

[0083] Similarly, as shown in Table 2 below, 1000 mm is divided into 5 fast sub-zones, and corresponding gears and flows are set.

[0084] Table 2: Fast sub-zone and corresponding gear and flow

[0085] [[B X ][interval]] <![CDATA[[C X Gear shift [[Q X ]flow]] [0 ≤ [B X ] < 1000 C21 Q21 1000≤[B X ]<2000]] C22 Q22 [CD AT 2000 ≤ [B X ] < 3000 C23 Q23 3000≤[B X ]<4000]]> C24 Q24 4000 < [B X ] < 5000 C25 Q25

[0086] Step S62 specifically includes the following sub-steps.

[0087] S620: Start cleaning according to the corresponding gear and flow, and rotate the displacement module motor in the positive direction, so that the nozzle moves towards the end position.

[0088] For example, clean with gear C2 and flow Q2. First, move the nozzle to the original position, and if the corresponding gear and flow of the original position have been set in advance according to the diameter of the heat storage wheel, directly execute cleaning according to the preset gear and flow.

[0089] S621: Determine the position of the nozzle and determine whether the gear matches the position interval.

[0090] Detect the position of the nozzle and determine whether the nozzle is in the position interval [B X ]. If the nozzle is in the position interval [B X ], then the gear corresponds to the position interval [B X ]. If the nozzle is still in the position interval [B X ], then clean according to the gear and flow corresponding to [B X ]. Compress the gear, execute the gear C X and flow Q X corresponding to [B X ], so that C2=C X and Q2=Q XThen jump back to step S620. If the nozzle is not in the position interval [B X ], jump back to step S620, and clean at the original gear and flow.

[0091] S622: Determine whether the end position signal is received.

[0092] If the end position signal is received (indicating that the nozzle has reached the end position), go to step S63; if not, return to step S621.

[0093] S63: The displacement module stops, and the drive motor is reversed to move the nozzle towards the original position.

[0094] S64: Reverse the execution of the [B X ]-[C X ]-[Q X ] logic, and then determine whether the original position signal is received through the nozzle position. If not, repeat this step; if yes, jump to step S65.

[0095] Reverse execution of the [B X ]-[C X ]-[Q X ] logic means moving towards the original position while reducing the pressure and flow.

[0096] S65: The motor of the displacement module stops, and the compressor of the nozzle cleaning module stops.

[0097] In an embodiment of the present application, the cleaning device is automatically started to clean by identifying that the wind speed is reduced to a certain value, and the speed is from slow to fast when running from the outside to the inside, achieving one-time full cleaning in place and reducing energy waste during reciprocating cleaning.

[0098] It should be noted that the cleaning method of the rotary heat exchanger provided in the embodiments of the present application can be suitable for cleaning heat storage wheels of different diameters.

[0099] Specifically, the adaptation of heat storage wheels of different diameters is determined by the single distance of nozzle stepping, the number of displacements, and the cumulative displacement distance. At the same time, the distance between the nozzle and the end position needs to be detected in real time (if the set limit distance X is reached, the displacement module stops running).

[0100] For example, when the diameter of the heat storage wheel is 1250 mm, the flow rate is Q1 in the range of 0-500 mm, Q2 in the range of 500-1000 mm, and Q3 in the range of 1000-1250 mm. When the distance between the nozzle and the last point is x1, the displacement module stops running. The interval distance is determined by the single displacement distance and the cumulative displacement distance, and the displacement module stops running time is determined by the nozzle position. The heat storage wheels with different diameters do not need additional control logic. Therefore, the cleaning method of the rotary heat exchanger provided by the embodiment of the application has wide application range and can be used for cleaning heat storage wheels with different diameters.

[0101] Compared with the prior art, the cleaning device provided by the application installs a sensor in the air duct. When the air pressure is detected to be low, the cleaning device automatically starts and stops to work, without the need for personnel to regularly check and then manually control the start / stop of the cleaning device. All the holes in the heat storage wheel are cleaned at one time by controlling the running speed of the nozzle. The application utilizes the features of the circumferential rotation of the heat storage wheel and the radial movement of the nozzle to automatically clean each hole in the heat storage wheel. Moreover, according to the hole diameter and the diameter of the heat storage wheel, the rotation speed of the heat storage wheel and the movement speed of the nozzle can be adjusted by adjusting the motor power, so as to adapt to the cleaning of heat storage wheels with different sizes of different air conditioners. Therefore, the application can improve the cleaning quality and cleaning efficiency of the heat storage wheel, reduce the labor intensity, and reduce the maintenance cost of the fresh air system.

[0102] The cleaning method of the rotary heat exchanger and the device thereof provided by the application are described in detail above. Any obvious modification made by a person skilled in the art without departing from the essential content of the application will constitute an infringement of the patent right of the application and will bear the corresponding legal responsibility.

Claims

1. A cleaning method for a rotary heat exchanger, characterized in that... Includes the following steps: S1: Based on the dimensions of the heat storage wheel and the orifice to be cleaned, configure parameters, including at least the delayed trigger cleaning time T0, the differential pressure trigger value P0, and the water nozzle cleaning diameter L1; set the segmentation radius, with the area between the segmentation radius and the origin point being the fast zone, and the area between the segmentation radius and the end point being the slow zone; the slow zone includes multiple slow sub-zones, with different speed settings and flow rates in each slow sub-zone; the fast zone includes multiple fast sub-zones, with different speed settings and flow rates in each fast sub-zone. S2: In automatic mode, read the wind pressure measurement value P1; S3: Determine whether the wind pressure measurement value P1 has reached the differential pressure trigger value P0. If it has not been reached, return to step S2; if it has been reached, proceed to the next step. S5: Read the parameters set in step S1; S6: Execute "Cleaning Mode", detect the nozzle position, and determine whether the nozzle is within the position range [B] X If the nozzle is in the position range [B] X ], then according to [B] X Cleaning is performed according to the corresponding speed and flow rate until completion.

2. The cleaning method for a rotary heat exchanger as described in claim 1, characterized in that: Step S6 includes the following sub-steps: S61: Determine if the nozzle position is at the original location; S62: The compressor begins cleaning according to the setting that matches the position; S63: The displacement module stops, the drive motor reverses, and the nozzle moves towards the original position. S64: Reverse execution [B] X ]-[C X ]-[Q X The logic is then used to determine whether the in-situ signal is received based on the nozzle position. If not, this step is repeated; if yes, the process jumps to step S65. S65: Displacement module motor stops, nozzle cleaning module compressor stops.

3. The cleaning method for a rotary heat exchanger as described in claim 2, characterized in that: Step S62 includes the following sub-steps: S620: Start cleaning according to the corresponding gear and flow rate, while the displacement module motor rotates forward, causing the nozzle to move towards the end point; S621: Determine the nozzle position and ensure that the setting matches the position range; S622: Determine whether the last bit signal has been received. If the last bit signal has been received, proceed to step S63; otherwise, return to step S621.

4. The cleaning method for a rotary heat exchanger as described in claim 3, characterized in that: Step S2 also includes reading the current time T1 using a timer. Between steps S3 and S5, there is also step S4, which determines whether the timer time T1 is greater than or equal to T0. If not, the process returns to step S2; if so, the process proceeds to step S5.

5. The cleaning method for a rotary heat exchanger as described in claim 4, characterized in that: The aforementioned speed setting assumes that the nozzle moves at a constant speed within the length of each slow or fast sub-region, causing the nozzle to move a step distance B within time βT / N. X Required motor power Where T is the time required for the heat storage wheel to rotate 360 ​​degrees; N is the number of channels at the maximum radius of the slow or fast zone; and the coefficient β is the reciprocal of the number of slow sub-zones.

6. The cleaning method for a rotary heat exchanger as described in claim 5, characterized in that: In step S621, the nozzle position is detected, and it is determined whether the nozzle is within the position range [B]. X If the nozzle is in the position range [B] X ], then according to [B] X Cleaning is performed according to the corresponding speed and flow rate; if the nozzle is not within the position range [B] X If the condition is met, then jump back to step S620.

7. The cleaning method for a rotary heat exchanger as described in claim 6, characterized in that: Determine whether the last bit signal has been received. If the last bit signal has been received, proceed to step S63; otherwise, return to step S621.

8. A cleaning device for a rotary heat exchanger, characterized in that... Includes a frame, heat storage wheels, motor, track, nozzles, hoses, and control circuitry; among which, The heat storage wheel is a circular cylinder, installed inside the frame, and the heat storage wheel includes multiple channels; The track is installed along the radial support of the frame, and sensors are installed at both the origin and end points of the track. The nozzle is connected to the hose and is slidably fixed on the track to spray gas or liquid from the hose into the channel. The motor is used to control the movement of the nozzle. The control circuit controls the operation of the motor to perform the cleaning method of the rotary heat exchanger according to any one of claims 1 to 7.

Images