Water heating control device for poultry house and control method thereof

Abstract

The present application relates to a kind of water heating control device and its control method for poultry house, connect a group of water heating radiator between drain pipe (3) and backwater pipe (4) and its cooperation warm air blower, water tank outlet is equipped with water tank water temperature detection probe, each radiator inlet and outlet are equipped with inlet water temperature detection probe and outlet water temperature detection probe, in poultry house, there is a group of air temperature detection probe in the heat area supplied by corresponding radiator;With controller MCU, each temperature probe is connected with controller MCU by RS485 bus, and the measured value of various temperature probes is transmitted to controller MCU, controller MCU runs control program and issues instructions, and the corresponding switching device is driven by the driving circuit connected to control the start or stop of warm air blower and circulating pump.The advantages and effects of the present application are as follows: ensure that warm air blower cannot blow cold wind to chicken, can effectively prevent the phenomenon of cold and warm air blowing alternately, reduce the disease of chicken flock due to blowing cold wind.

Description

Technical fields:

[0001] This invention relates to a water heating control device, and more particularly to a water heating control device and its control method for use in poultry farms. Background technology:

[0002] Heating systems are essential for intensive poultry farms. Current technology utilizes piped hot water circulation to deliver heat into the sheds, achieving the purpose of heating and insulation. Common control methods include circulating pump on / off control and heater on / off control. A common drawback of both methods is that the circulating pump and heater operate independently. When the water temperature is insufficient, the heater blows cold air directly onto the chickens; conversely, when the water temperature rises, warm air is blown onto the chickens. This fluctuating temperature can easily lead to illness in the flock. Even if the chickens don't get sick, it can reduce the feed conversion ratio, thus lowering economic returns. Summary of the Invention

[0003] The purpose of this invention is to address the problem of uneven heating in existing poultry house heating devices by providing a water heating control device and its control method for poultry houses, which avoids alternating cold and warm air blowing on the chickens during operation, thereby reducing the chance of the chickens getting sick due to sudden temperature changes.

[0004] The present invention adopts the following technical solution:

[0005] A water heating control device for poultry farms includes a water tank 1, with a drain pipe 3 and a return pipe 4 connected to the upper and lower parts of the water tank, respectively. A circulation pump 2 is installed at the initial section of the drain pipe 3 connected to the water tank. A set of water heating radiators is connected between the drain pipe 3 and the return pipe 4. Each radiator is equipped with a warm air blower to blow warm air from the radiator into the poultry farm. The device is characterized by:

[0006] The water tank outlet is equipped with a water temperature detection probe. w0 Its measured value is used to control the start and stop of the circulating pump P;

[0007] Each radiator is equipped with an inlet water temperature detection probe and an outlet water temperature detection probe, respectively. The measured values ​​are used to control the start and stop of the corresponding fan heater.

[0008] A set of air temperature detection probes is installed in the poultry house, corresponding to the heating area supplied by the radiator.

[0009] Temperature probes for non-heating areas are installed between the poultry house and adjacent radiators.

[0010] The system is equipped with a controller MCU. Each temperature probe is connected to the controller MCU via an RS485 bus. The measured values ​​from the various temperature probes are transmitted to the controller MCU. The controller MCU runs a control program and issues commands to drive the corresponding switching devices through the connected drive circuit to control the start or stop of the heater and the circulating pump.

[0011] The present invention also provides a control method for a water heating control device for a poultry farm, the variables, symbols, and calculation methods used in this control method are explained below:

[0012] t w0 This refers to the water temperature detection probe at the water tank outlet, and also the water temperature value measured by the probe at the water tank outlet.

[0013] t w1 t w2 …t wn This means that the water temperature detection probe at the radiator inlet is the water temperature value measured at the radiator inlet.

[0014] t u1 t u2 …t un This means that the water temperature detection probe at the corresponding radiator outlet is also the water temperature value measured at the corresponding radiator outlet.

[0015] t1, t2, ...t n It represents both the air temperature probe in the area heated by the radiator Sn and the air temperature value measured by the probe.

[0016] T n This refers to a common air temperature probe used to control the heaters in adjacent heating zones;

[0017] t a1 t a2 …t an The average air temperature in the heat dissipation zone and the non-heating zone is represented by t1, T1, t2, ..., Tn-1, t n The initial position ta1 is obtained by averaging the adjacent temperature values, i.e., ta1 = (t1 + T1) / 2...t an = (Tn-1+tn) / 2;

[0018] T0 is the threshold for activating the circulating water pump, which can be modified through the human-machine interface.

[0019] T l The activation threshold for the heater's Fn function can be modified through the human-machine interface.

[0020] T t The threshold for stopping the heater's Fn function can be modified through the human-machine interface.

[0021] The present invention also provides a control method for a water heating control device for a poultry farm, characterized by comprising the following steps:

[0022] S1. Compare the average air temperature t in the area where each radiator is located. a1 t a2 …t an With the start-up threshold T of the heater l The relationship between the magnitudes of the values ​​indicates that if the average air temperature in any area is lower than the start-up threshold of the heater, then there exists a t... an <T l If the condition is met, proceed to step S2; otherwise, proceed to step S5.

[0023] S2. Compare the water temperature t in the water tank. w0 The relationship between the water tank temperature and the circulating water pump start-up threshold T0 is as follows: if the water tank temperature reaches the circulating water pump start-up threshold, i.e., t w0 If T0 is greater than or equal to T0, proceed to step S3; otherwise, proceed to step S6.

[0024] S3. Start the circulating water pump and proceed to step S4;

[0025] S4. Execute the heater start / stop control subroutine A, and then execute step S8;

[0026] S5. Compare the air temperature t in the area where each radiator is located. a1 t a2 …t an With the heater stop threshold T t The relationship between the magnitudes is such that if the air temperature in all areas is greater than the heater's stop threshold, i.e., t... an >T t If the condition is met, proceed to step S6; otherwise, proceed to step S8.

[0027] S6. Stop the circulating water pump and proceed to step S7;

[0028] S7. Execute the heater start / stop control subroutine B, and then execute step 8;

[0029] S8. End.

[0030] The further technical solution is as follows:

[0031] Subroutine A in step S4 includes the following steps:

[0032] S41. Compare the inlet temperature t of radiator Sn. wn The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located. an With the start-up threshold T of the heater lThe relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S42; otherwise, proceed to step S43.

[0033] S42. Start the heater Fn and proceed to step S44;

[0034] S43. Stop starting the heater Fn, and proceed to step S44;

[0035] S44. End.

[0036] Subroutine B in step S7 includes the following steps:

[0037] S71. Compare the outlet temperature t of radiator Sn. un The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located an With the start-up threshold T of the heater l The relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S72; otherwise, proceed to step S73.

[0038] S72. Start the heater Fn and proceed to step S74;

[0039] S73. Stop the heater Fn and proceed to step S74;

[0040] S74. End.

[0041] Advantages and effects of this invention compared to existing technologies:

[0042] This device ensures that the water temperature in the radiator is within the required range when the heater is started, preventing cold air from blowing onto the chickens. It effectively prevents alternating hot and cold air blowing and reduces the risk of chickens getting sick from being exposed to cold air. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the working principle of the water heating control device of the present invention;

[0044] Figure 2 This is a schematic diagram of the electrical control structure of the water heating control device of the present invention;

[0045] Figure 3 This is the main program flowchart of the control method of the present invention;

[0046] Figure 4 This is the flowchart of subroutine A and subroutine B. Detailed implementation method:

[0047] Example 1

[0048] like Figure 1 , Figure 2 As shown, the present invention provides a water heating control device for poultry farms, comprising a water tank 1, with a drain pipe 3 and a return pipe 4 connected to the upper and lower parts of the water tank, respectively. A circulation pump 2 is installed at the initial section of the drain pipe 3 connected to the water tank. A set of water heating radiators S1, S2...Sn are connected between the drain pipe 3 and the return pipe 4, the number of which is unlimited. Each radiator S1, S2...Sn is equipped with a corresponding warm air blower F1, F2,...Fn, which blows warm air into the poultry farm. The present invention also includes the following components:

[0049] 1. A water temperature detection probe t is installed on the drain pipe 3 at the outlet of water tank 1. w0 Its measured value is used to control the start and stop of the circulating pump P;

[0050] 2. Each radiator Fn is equipped with an inlet water temperature detection probe twn and an outlet water temperature detection probe tun at its inlet and outlet, respectively. The measured values ​​are used to control the start and stop of the heater Fn corresponding to the radiator Sn.

[0051] 3. A set of air temperature detection probes t1, t2, ..., tn are installed in the poultry breeding house, corresponding to the air temperature detection probes t1, t2, ..., tn of the heating area supplied by the radiators S1, S2, ..., Sn;

[0052] 4. A set of temperature probes T1, T2...Tn-1 are installed in the heating area between adjacent radiators in the poultry breeding house to control the warm air blower of the adjacent radiator;

[0053] 5. A controller MCU is provided. Each temperature probe is connected to the controller MCU via a corresponding RS485 bus. The measured values ​​of various temperature probes are transmitted to the controller MCU. The controller MCU runs the control program and issues instructions to drive the corresponding switching devices through the connected drive circuit to control the start or stop of the heater and circulation pump.

[0054] Example 2:

[0055] The present invention also provides a control method for a water heating control device for a poultry farm, wherein the variables used, their symbols, and calculation methods are explained below:

[0056] t w0This refers to the water temperature detection probe at the water tank outlet, and also the water temperature value measured by the probe at the water tank outlet.

[0057] t w1 t w2 …t wn This means that the water temperature detection probe at the radiator inlet is the water temperature value measured at the radiator inlet.

[0058] t u1 t u2 …t un This means that the water temperature detection probe at the corresponding radiator outlet is also the water temperature value measured at the corresponding radiator outlet.

[0059] t1, t2, ...t n It represents both the air temperature probe in the area heated by the radiator Sn and the air temperature value measured by the probe.

[0060] T n This refers to a common air temperature probe used to control the heaters in adjacent heating zones;

[0061] t a1 t a2 …t an The average air temperature in the heat dissipation zone and the non-heating zone is represented by t1, T1, t2, ..., Tn-1, t n The initial position ta1 is obtained by averaging the adjacent temperature values, i.e., ta1 = (t1 + T1) / 2...t an = (Tn-1+tn) / 2;

[0062] T0 is the threshold for activating the circulating water pump, which can be modified through the human-machine interface.

[0063] T l The activation threshold for the heater's Fn function can be modified through the human-machine interface.

[0064] T t The threshold for stopping the heater's Fn function can be modified through the human-machine interface.

[0065] The present invention also provides a control method for the above-mentioned water heating control device for poultry farm housing, such as... Figure 3 As shown, the main program steps are as follows:

[0066] S1. Compare the average air temperature t in the area where each radiator is located. a1 t a2 …t an With the start-up threshold T of the heater l The relationship between the magnitudes of the values ​​indicates that if the average air temperature in any area is lower than the start-up threshold of the heater, then there exists a t... an<T l If the condition is met, proceed to step S2; otherwise, proceed to step S5.

[0067] S2. Compare the water temperature t in the water tank. w0 The relationship between the water tank temperature and the circulating water pump start-up threshold T0 is as follows: if the water tank temperature reaches the circulating water pump start-up threshold, i.e., t w0 If T0 is greater than or equal to T0, proceed to step S3; otherwise, proceed to step S6.

[0068] S3. Start the circulating water pump and proceed to step S4;

[0069] S4. Execute the heater start / stop control subroutine A, and then execute step S8;

[0070] S5. Compare the air temperature t in the area where each radiator is located. a1 t a2 …t an With the heater stop threshold T t The relationship between the magnitudes is such that if the air temperature in all areas is greater than the heater's stop threshold, i.e., t... an >T t If the condition is met, proceed to step S6; otherwise, proceed to step S8.

[0071] S6. Stop the circulating water pump and proceed to step S7;

[0072] S7. Execute the heater start / stop control subroutine B, and then execute step 8;

[0073] S8. End.

[0074] like Figure 4 As shown, subroutine A in step S4 includes the following steps:

[0075] S41. Compare the inlet temperature t of radiator Sn. wn The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located. an With the start-up threshold T of the heater l The relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S42; otherwise, proceed to step S43.

[0076] S42. Start the heater Fn and proceed to step S44;

[0077] S43. Stop the heater Fn and proceed to step S44;

[0078] S44. End.

[0079] like Figure 4 As shown, subroutine B in step S7 includes the following steps:

[0080] S71. Compare the outlet temperature t of radiator Sn. un The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located an With the start-up threshold T of the heater l The relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S72; otherwise, proceed to step S73.

[0081] S72. Start the heater Fn and proceed to step S74;

[0082] S73. Stop the heater Fn and proceed to step S74;

[0083] S74. End.

Claims

1. A control method for a water heating control device for poultry farms, comprising a water tank (1), with a drain pipe (3) and a return pipe (4) connected to the upper and lower parts of the water tank respectively; a circulation pump (2) is installed at the initial section of the drain pipe (3) connected to the water tank; a set of water heating radiators are connected between the drain pipe (3) and the return pipe (4); each radiator is equipped with a warm air blower to blow warm air from the radiator into the poultry farm; and a water temperature detection probe is installed at the outlet of the water tank. w0 Its measured value is used to control the start and stop of the circulating pump P; Each radiator is equipped with an inlet water temperature detection probe and an outlet water temperature detection probe, respectively. The measured values ​​are used to control the start and stop of the corresponding fan heater. A set of air temperature detection probes is installed in the poultry house, corresponding to the heating area supplied by the radiator. Temperature probes for non-heated areas are installed between the poultry house and adjacent radiators. A controller MCU is provided. Each temperature probe is connected to the controller MCU via an RS485 bus, transmitting the collected temperature probe values ​​to the controller MCU. The controller MCU runs a control program and issues commands, which drive the corresponding switching devices through connected drive circuits to control the start or stop of the heater and circulating pump. The variables used, their symbols, and calculation methods are explained below: t w0 This refers to the water temperature detection probe at the water tank outlet, and also the water temperature value measured by the probe at the water tank outlet. t w1 t w2 …t wn This means that the water temperature detection probe at the radiator inlet is the water temperature value measured at the radiator inlet. t u1 t u2 …t un This means that the water temperature detection probe at the corresponding radiator outlet is also the water temperature value measured at the corresponding radiator outlet. t1, t2, ...t n It represents both the air temperature probe in the area heated by the radiator Sn and the air temperature value measured by the probe. T n This refers to a common air temperature probe used to control the heaters in adjacent heating zones; t a1 t a2 …t an The average air temperature in the heat dissipation zone and the non-heating zone is represented by t1, T1, t2, ... T n-1 t n The value is obtained by averaging adjacent temperature values, i.e., the initial position t. a1 = (t1+T1) / 2……t an =(T n-1 +t n ) / 2; T0 is the threshold for activating the circulating water pump, which can be modified through the human-machine interface. T l The activation threshold for the heater's Fn function can be modified through the human-machine interface. T t The threshold for stopping the heater's Fn function can be modified through the human-machine interface; Its features Includes the following steps: S1. Compare the average air temperature t in the area where each radiator is located. a1 t a2 …t an With the start-up threshold T of the heater l The relationship between the magnitudes of the values ​​indicates that if the average air temperature in any area is lower than the start-up threshold of the heater, then there exists a t... an <T l If the condition is met, proceed to step S2; otherwise, proceed to step S5. S2. Compare the water temperature t in the water tank. w0 The relationship between the water tank temperature and the circulating water pump start-up threshold T0 is as follows: if the water tank temperature reaches the circulating water pump start-up threshold, i.e., t w0 If T0 is greater than or equal to T0, proceed to step S3; otherwise, proceed to step S6. S3. Start the circulating water pump and proceed to step S4; S4. Execute the heater start / stop control subroutine A: S41. Compare the inlet temperature t of radiator Sn. wn The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located. an With the start-up threshold T of the heater l The relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S42; otherwise, proceed to step S43. S42. Start the heater Fn and proceed to step S44; S43. Stop starting the heater Fn, and proceed to step S44; S44. Perform step S8; S5. Compare the air temperature t in the area where each radiator is located. a1 t a2 …t an With the heater stop threshold T t The relationship between the magnitudes is such that if the air temperature in all areas is greater than the heater's stop threshold, i.e., t... an >T t If the condition is met, proceed to step S6; otherwise, proceed to step S8. S6. Stop the circulating water pump and proceed to step S7; S7. Execute heater start / stop control subroutine B: S71. Compare the outlet temperature t of radiator Sn. un The relationship between the value of the circulating water pump start-up threshold T0 and the average air temperature t in the area where the radiator Sn is located an With the start-up threshold T of the heater l The relationship between the sizes of the inlet water and the radiator Sn is such that if the inlet water temperature reaches the starting temperature of the circulating water pump and the average air temperature in the area where the radiator Sn is located is lower than the starting temperature of the heater, i.e., t wn ≥T0 and t an <T l If both conditions are met, proceed to step S72; otherwise, proceed to step S73. S72. Start the heater Fn and proceed to step S74; S73. Stop the heater Fn and proceed to step S74; S74. Proceed to step 8; S8. End.

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