Control device and system for warehouse air conditioner

Abstract

The utility model discloses a warehouse air conditioner control device and system, the device comprises a manual switch, a temperature control circuit and a temperature transmitter, the manual switch comprises a heating gear, a refrigeration gear and a forcing gear, the temperature control circuit comprises a heating gear loop, a refrigeration gear loop and a forcing gear loop, the manual switch is used for switching the heating gear loop, the refrigerating gear loop or the forcing gear loop in response to user operation; the forced gear loop is conducted when the manual switch is switched to the forced gear, so that the air conditioner is controlled to heat or refrigerate in response to an external control signal; and the temperature transmitter is used for sending a control level signal to the heating gear loop and the refrigeration gear loop in response to the fact that the detected environment temperature in the warehouse is out of the preset temperature range, so that the heating gear loop or the refrigeration gear loop is controlled to be conducted, and the air conditioner is made to conduct heating or refrigeration.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning technology control, and more specifically, to a control device and system for warehouse air conditioning. Background Art

[0002] Since conventional air conditioners can only be set to a fixed temperature to maintain the indoor ambient temperature at the preset temperature, the air conditioner will be in operation all the time or frequently if the temperature changes slightly, which consumes a lot of energy and is costly. However, in many actual application scenarios, the required ambient temperature is relatively wide, and the temperature of the air conditioner does not need to be maintained at a specific value. The current solutions to similar problems are: one is manual regular inspections, that is, the air conditioner is always on in summer and winter, and the air conditioner is turned on and off manually at irregular intervals in spring and autumn. This solution consumes a lot of energy and has a high labor cost; another solution is to abandon the existing conventional air conditioner and replace it with an air conditioning unit with a temperature control system. This solution is costly and wasteful. Utility Model Content

[0003] The utility model provides a control device and a system for a warehouse air conditioner, so as to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The first aspect of the utility model provides a control device for a warehouse air conditioner, the device comprising a manual switch, a temperature control circuit and a temperature transmitter, wherein:

[0006] The manual switch includes a heating gear, a cooling gear and a forced gear, the temperature control circuit includes a heating gear circuit, a cooling gear circuit and a forced gear circuit, and the manual switch is used to switch the heating gear circuit, the cooling gear circuit or the forced gear circuit in response to user operation, wherein:

[0007] The first end of the heating gear is connected to the first end of the heating gear circuit, the second end of the heating gear is connected to the first power supply end, and the second end of the heating gear circuit is connected to the second power supply end;

[0008] The first end of the refrigeration gear is connected to the first end of the refrigeration gear circuit, the second end of the refrigeration gear is connected to the first power supply end, and the second end of the refrigeration gear circuit is connected to the second power supply end;

[0009] The first end of the forced gear is connected to the first end of the forced gear circuit, the second end of the forced gear is connected to the first power supply end, the second end of the forced gear circuit is connected to the second power supply end, and the forced gear circuit is turned on when the manual switch is switched to the forced gear, so that the air conditioner can control heating or cooling of the air conditioner in response to an external control signal;

[0010] The temperature transmitter is used to send a control level signal to the heating gear circuit and the cooling gear circuit in response to the detected current ambient temperature in the warehouse being outside the preset temperature range, so as to control the conduction of the heating gear circuit or the cooling gear circuit, thereby allowing the air conditioner to heat or cool.

[0011] Optionally, the heating gear circuit includes a first power relay coil, a first switch, a third switch and a fourth switch.

[0012] The first end of the fourth switch is connected to the first end of the heating gear, the second end of the fifth switch is connected to the first end of the third switch, and is also connected to the first end of the first switch;

[0013] The first end of the first power relay coil is connected to the second end of the third switch and also to the second end of the first switch. The second end of the first power relay coil is connected to the second power supply end. The first power relay coil is used to control the first switch.

[0014] Optionally, the cooling gear circuit includes a second power relay coil, a second switch, a fifth switch and a sixth switch.

[0015] The first end of the fifth switch is connected to the first end of the cooling gear, the second end of the fifth switch is connected to the first end of the sixth switch, and is also connected to the first end of the second switch;

[0016] The first end of the second power relay coil is connected to the second end of the sixth switch and also connected to the second end of the second switch. The second end of the second power relay coil is connected to the second power supply end. The second power relay coil is used to control the second switch.

[0017] Optionally, the forced gear includes a third power relay coil,

[0018] The first end of the third power relay coil is connected to the first end of the forced gear, and the second end of the third power relay coil is connected to the second power supply end.

[0019] Optionally, the device further comprises a first relay coil and a second relay coil,

[0020] The first end of the first relay coil is connected to the second end of the sixth switch, and the second end is connected to the second power supply end, and the first relay coil is used to control the fourth switch;

[0021] The first end of the second relay coil is connected to the second end of the third switch, and the second end of the second relay coil is connected to the second power supply end. The second relay coil is used to control the fifth switch.

[0022] Optionally, the heating gear circuit includes a first self-locking circuit, and the cooling gear circuit includes a second self-locking circuit.

[0023] Optionally, the first power supply is a direct current power supply, and its voltage value is 0-24VDC.

[0024] The second aspect of the utility model provides a control system for a warehouse air conditioner, the system comprising the control device for the warehouse air conditioner and an air conditioner main control module as described above, wherein:

[0025] The air conditioner main control module controls the working mode of the air conditioner in response to the control signal of the control device of the warehouse air conditioner.

[0026] Optionally, the air conditioner main control module includes an air conditioner, a seventh switch, an eighth switch and a ninth switch, wherein:

[0027] The first end of the seventh switch is connected to the third power supply end, the second end of the seventh switch is connected to the first input end of the air conditioner, and the seventh switch is used to control the heating of the air conditioner;

[0028] The first end of the eighth switch is connected to the third power supply end, the second end of the eighth switch is connected to the second input end of the air conditioner, and the eighth switch is used to control the cooling of the air conditioner;

[0029] The first end of the ninth switch is connected to the third power supply end, the second end of the ninth switch is connected to the third input end of the air conditioner, and the ninth switch is used to control the heating or cooling of the air conditioner.

[0030] Optionally, when the heating gear circuit of the control device of the warehouse air conditioner is turned on, the seventh switch is closed to control the air conditioner to heat;

[0031] When the refrigeration gear circuit of the control device of the warehouse air conditioner is turned on, the eighth switch is closed to control the air conditioner to refrigerate;

[0032] When the forced gear circuit of the control device of the warehouse air conditioner is turned on, the ninth switch is closed to control the air conditioner to heat or cool.

[0033] The beneficial effects of the utility model are as follows:

[0034] The utility model introduces an automatic temperature control circuit into the air-conditioning working circuit, so that the conventional air-conditioning can automatically start and stop within a temperature range and realize wide temperature control. The air-conditioning can maintain a relatively long stop time and almost consumes no electricity during the stop process, thus solving the problem of power consumption of conventional air-conditioning, reducing energy consumption to the greatest extent and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0036] Figure 1 A schematic diagram showing the temperature control device of an air conditioner of the utility model;

[0037] Figure 2 A schematic diagram of the main control module of the air conditioner of the present utility model is shown. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the utility model, the utility model is further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the utility model.

[0039] Since conventional air conditioners can only be set to a fixed temperature to maintain the indoor ambient temperature at the preset temperature, the air conditioner will be in operation all the time or frequently if the temperature changes slightly, which consumes a lot of energy and is costly. However, in many actual application scenarios, the required ambient temperature is relatively wide, and the temperature of the air conditioner does not need to be maintained at a specific value. The current solutions to similar problems are: one is manual regular inspections, that is, the air conditioner is always on in summer and winter, and the air conditioner is turned on and off manually at irregular intervals in spring and autumn. This solution consumes a lot of energy and has a high labor cost; another solution is to abandon the existing conventional air conditioner and replace it with an air conditioning unit with a temperature control system. This solution is costly and wasteful.

[0040] The utility model provides a control device and system for a warehouse air conditioner. On the basis of a conventional air conditioner, the forced start switch circuit of the conventional air conditioner is modified, and a new automatic temperature control circuit is introduced into the circuit, so that the conventional air conditioner can automatically start and stop within a preset temperature range, thereby realizing wide temperature control, and solving the problem of high consumption cost caused by the conventional air conditioner being always on and replacing a new air conditioner unit.

[0041] The first aspect of the utility model provides a control device for a warehouse air conditioner, the device comprising a manual switch, a temperature control circuit and a temperature transmitter, wherein:

[0042] The manual switch includes a heating gear, a cooling gear and a forced gear, the temperature control circuit includes a heating gear circuit, a cooling gear circuit and a forced gear circuit, and the manual switch is used to switch the heating gear circuit, the cooling gear circuit or the forced gear circuit in response to user operation, wherein:

[0043] The first end of the manual switch heating gear is connected to the first end of the heating gear circuit, the second end of the heating gear is connected to the first power supply end, the heating gear is used to enable the heating gear circuit, and the second end of the heating gear circuit is connected to the second power supply end;

[0044] The heating gear circuit includes a first power relay coil, a first switch, a third switch and a fourth switch.

[0045] A first end of the fourth switch is connected to the first end of the heating gear, a second end of the fourth switch is connected to the first end of the third switch, and is also connected to the first end of the first switch;

[0046] The first end of the first power relay coil is connected to the second end of the third switch and also to the second end of the first switch. The second end of the first power relay coil is connected to the second power supply end. The first power relay coil is used to control the first switch.

[0047] The first end of the manual switch refrigeration gear is connected to the first end of the refrigeration gear circuit, the second end of the refrigeration gear is connected to the first power supply end, the refrigeration gear is used to enable the refrigeration gear circuit, and the second end of the refrigeration gear circuit is connected to the second power supply end;

[0048] The cooling gear circuit includes a second power relay coil, a second switch, a fifth switch and a sixth switch.

[0049] The first end of the fifth switch is connected to the first end of the cooling gear, the second end of the fifth switch is connected to the first end of the sixth switch, and is also connected to the first end of the second switch;

[0050] The first end of the second power relay coil is connected to the second end of the sixth switch and also to the second end of the second switch. The second end of the second power relay coil is connected to the second power supply end. The second power relay coil is used to control the second switch.

[0051] The first end of the forced gear of the manual switch is connected to the first end of the forced gear circuit, the second end of the forced gear is connected to the first power supply end, the forced gear is used to enable the forced gear circuit, the second end of the forced gear circuit is connected to the second power supply end, and the forced gear circuit is turned on when the manual switch is switched to the forced gear, so that the air conditioner can respond to an external control signal to control the air conditioner heating or cooling;

[0052] The forced gear circuit includes a third power relay coil, a first end of the third power relay coil is connected to the first end of the manual switch forced gear, and a second end of the third power relay coil is connected to the second power supply end, for controlling the air conditioner heating or cooling.

[0053] The temperature transmitter is used to send a control level signal to the heating gear circuit and the cooling gear circuit in response to the detected current ambient temperature in the warehouse being outside the preset temperature range, so as to control the heating gear circuit or the cooling gear circuit to be turned on, thereby allowing the air conditioner to heat or cool.

[0054] The device also includes a first relay coil and a second relay coil,

[0055] Wherein, the first end of the first relay coil is connected to the second end of the sixth switch, the second end is connected to the second power supply end, and the first relay coil is used to control the fourth switch;

[0056] The first end of the second relay coil is connected to the second end of the third switch, and the second end is connected to the second power supply end. The second relay coil is used to control the fifth switch.

[0057] The detected indoor ambient temperature value is converted into a control level signal through a temperature transmitter, and the third switch and the sixth switch are controlled by the level signal; the power relay coil is used to isolate the voltage; the first power supply is a DC power supply, and its voltage value is 0V-24VDC, and the second power supply is an AC power supply, and its voltage value is N-220VAC.

[0058] In a specific embodiment, Figure 1 As shown, the temperature range between the lower temperature alarm value and the upper temperature alarm value of the temperature transmitter (the temperature transmitter is not shown) is used as the preset temperature range of this embodiment, wherein the signal corresponding to the lower temperature alarm value of the temperature transmitter is the temperature transmitter with a lower limit normally open output signal, and the signal corresponding to the upper temperature alarm value of the temperature transmitter is the temperature transmitter with an upper limit normally open output signal; if the indoor environment temperature value is less than the temperature value of the temperature transmitter with a lower limit normally open output signal, the third switch S3 is closed; if the indoor environment temperature value is greater than the temperature value of the temperature transmitter with a lower limit normally open output signal, the third switch S3 is disconnected; if the indoor environment temperature value is greater than the temperature value of the temperature transmitter with an upper limit normally open output signal, the sixth switch S6 is closed; if the indoor environment temperature value is less than the temperature value of the temperature transmitter with an upper limit normally open output signal, the sixth switch S6 is disconnected. In this embodiment, the preset temperature range of the temperature transmitter is 20°C-33°C, that is, the lower temperature alarm value of the temperature transmitter is 20°C, and the upper temperature alarm value of the temperature transmitter is 33°C.

[0059] The current indoor ambient temperature is measured according to the temperature transmitter. If the indoor ambient temperature is lower than the lower temperature limit alarm value of the temperature transmitter, the third switch S3 is closed, and the manual switch SW is switched to the heating gear to construct a heating gear circuit. At this time, the heating gear circuit is not conductive; if the indoor ambient temperature is greater than the upper temperature limit alarm value of the temperature transmitter, the sixth switch S6 is closed, and the manual switch SW is switched to the cooling gear to construct a cooling gear circuit. At this time, the cooling gear circuit is not conductive; if the indoor ambient temperature is within the preset temperature range of the temperature transmitter, the manual switch SW is switched to the heating gear or the cooling gear. At this time, the air conditioner is in a shutdown state to save energy consumption to the greatest extent.

[0060] In this embodiment, the two ends of the fourth switch S4 correspond to the first pin and the ninth pin of the first relay coil KA4 respectively, and the two ends of the fifth switch S5 correspond to the first pin and the ninth pin of the second relay coil KA5 respectively. The initial states of the fourth switch S4 and the fifth switch S5 are both closed. If the current season is winter, when the temperature transmitter measures the indoor ambient temperature to be less than 20°C, the manual switch SW is switched to the heating gear to construct a heating gear circuit, but the heating gear circuit is not turned on at this time; because the current indoor ambient temperature is less than the lower temperature limit alarm value of the temperature transmitter, that is, the third switch S3 is closed, the heating gear circuit is turned on at this time, the second relay coil KA5 is energized, and the currently measured temperature value is converted into an electrical signal, and the fifth switch S5 is controlled to be disconnected. At the same time, when the third switch S3 is closed, the first power relay coil KA1 is energized, and the currently measured temperature value is converted into an electrical signal, and the first switch S1 is controlled to be closed to keep the heating gear circuit turned on. After the first switch S1 in the heating gear circuit is turned on, whether the third switch S3 is closed or disconnected, it will not affect the operation of the heating gear circuit; and after the first power relay coil KA1 is energized, the seventh switch S7 is controlled to be closed to control the air conditioner to perform heating work; the air conditioner After heating for a period of time, the indoor ambient temperature is higher than 20°C. At this time, the third switch S3 is disconnected. Since the first switch S1 is in a closed state, the heating gear circuit is turned on, and the air conditioner continues to heat until the current indoor ambient temperature exceeds 33°C. The sixth switch S6 is closed, the first relay coil KA4 is energized, and the fourth switch S4 is controlled to be disconnected, then the heating gear circuit is disconnected, and the air conditioner stops heating; when the temperature transmitter measures that the indoor ambient temperature is less than 33°C, the sixth switch S6 is controlled to be disconnected, the first relay coil KA4 is powered off, and the fourth switch S4 is controlled to be closed again. At this time, the air conditioner is in a shutdown state; when the temperature transmitter measures that the indoor ambient temperature is lower than 20°C again, the third switch S3 is controlled to be closed again, the first power relay coil KA1 is energized to make the first switch S1 closed, the heating gear circuit is turned on again, and the air conditioner starts heating, thereby completing the control of the winter warehouse temperature range, reducing the working time of the air conditioner, reducing energy consumption, and saving costs.

[0061] In this embodiment, two ends of the first switch S1 correspond to the fifth pin and the ninth pin of the first power relay coil KA1 , and two ends of the seventh switch S7 correspond to the eighth pin and the twelfth pin of the first power relay coil KA1 .

[0062] Specifically, if the current season is summer, when the temperature transmitter measures the indoor ambient temperature to be greater than 33°C, the manual switch SW is switched to the cooling gear to construct a cooling gear circuit. At this time, the cooling gear circuit is not turned on; initially, the fifth switch S5 is in a closed state. Since the current indoor ambient temperature is greater than the upper temperature limit alarm value of the temperature transmitter, that is, the sixth switch S6 is closed, the cooling gear circuit is turned on, the first relay coil KA4 is energized, and the fourth switch S4 in the heating gear circuit is controlled to be disconnected. When the sixth switch S6 is closed, the second power relay coil KA2 is energized to control the second switch S2 to be closed. When the second switch S2 is closed, whether the sixth switch S6 is closed or disconnected, the cooling gear circuit is turned on, and after the second power relay coil KA2 is energized, the eighth switch S8 is controlled to be closed, thereby controlling the air conditioner to perform cooling. After the air conditioner has been cooled for a period of time, the temperature transmitter measures the indoor ambient temperature to be greater than the upper temperature limit alarm value of the temperature transmitter. When the ambient temperature is lower than 33°C, the sixth switch S6 is disconnected. Since the second switch S2 is in the closed state, the air conditioner continues to cool until the current ambient temperature is lower than 20°C, the third switch S3 is closed, the second relay coil KA5 is energized, so that the fifth switch S5 is disconnected. At this time, the cooling gear circuit is disconnected and the air conditioner stops cooling; when the temperature transmitter measures that the indoor ambient temperature is higher than 20°C again, the third switch S3 is disconnected, the second relay coil KA5 is powered off, and the fifth switch S5 is controlled to be closed again. At this time, the air conditioner is in the shutdown state; when the indoor ambient temperature is higher than 33°C again, the sixth switch S6 is closed again, the second power relay coil KA2 is energized, so that the second switch S2 is closed again, and the cooling gear circuit is turned on again, thereby controlling the eighth switch S8 to be closed, and the air conditioner is controlled to be in the cooling working state. The operation of the air conditioner is controlled in this cycle, so that the air conditioner automatically starts and stops within the preset temperature range, thereby reducing energy consumption.

[0063] In this embodiment, two ends of the second switch S2 correspond to the fifth pin and the ninth pin of the second power relay coil KA2, and two ends of the eighth switch S8 correspond to the eighth pin and the twelfth pin of the second power relay coil KA2.

[0064] Specifically, if the current season is spring or autumn, the manual switch can be switched to the heating gear or the cooling gear. According to whether the current indoor ambient temperature is within the preset temperature range, the temperature control of the air conditioner is achieved through the heating gear circuit or the cooling gear circuit according to the above method. In this embodiment, if the current season is autumn, the manual switch is switched to the heating gear; if the current season is spring, the manual switch is switched to the cooling gear.

[0065] Specifically, in order to avoid the abnormal situation that the air conditioner cannot be started due to the failure of the temperature transmitter during daily use, the utility model also adds a forced gear of the manual switch, that is, after the manual switch is turned to the forced gear, a forced gear circuit is constructed. When the forced gear circuit is turned on, the air conditioner will continue to be in a powered-on state, and the temperature transmitter will not participate in the switch control of the air conditioner, and the air conditioner is controlled to perform heating or cooling through an external control signal. If the temperature transmitter of the air conditioner suddenly fails during the heating process, the manual switch SW is switched to the forced gear, the third power relay coil KA3 is energized, the ninth switch S9 is controlled to be closed, and the air conditioner is manually controlled to perform heating through an external heating control level signal; if the temperature transmitter of the air conditioner suddenly fails during the cooling process, the manual switch SW is switched to the forced gear, the third power relay coil KA3 is energized, the ninth switch S9 is controlled to be closed, and the air conditioner is manually controlled to perform cooling through an external cooling control level signal. In this embodiment, the two ends of the ninth switch S9 correspond to the fifth pin and the ninth pin of the third power relay coil KA3, respectively.

[0066] like Figure 1 As shown, the utility model includes a self-locking circuit in both the heating gear circuit and the cooling gear circuit. Here, the second self-locking circuit in the cooling gear circuit is taken as an example. When the temperature exceeds 33°C, the sixth switch S6 is closed, so that the second power relay coil KA2 is energized, thereby controlling the second switch S2 to be closed. When the cooling gear circuit is turned on, it is locked through the second self-locking circuit. When the temperature is lower than 20°C, the lowest value of the preset temperature range, the third switch S3 is closed, so that the second relay coil KA5 is energized, and the fifth switch S5 is controlled to be disconnected, resulting in the cooling gear circuit being disconnected. When the indoor temperature is higher than 20°C, the third switch S3 is disconnected, the second relay coil KA5 is de-energized, resulting in the fifth switch S5 being closed. At this time, the air conditioner is in a shutdown state until the indoor temperature is higher than 33°C, the sixth switch S6 is closed again, the second power relay coil KA2 is energized, so that the second switch S2 is closed again, the cooling gear circuit is turned on again, and the air conditioner is controlled to perform cooling work. The use of a self-locking circuit can accurately identify the indoor ambient temperature, control the air conditioner to start and stop automatically, and save energy.

[0067] Figure 2 It is a schematic diagram of the main control module of the air conditioner. If the first power relay coil KA1 in the temperature control circuit is energized, the seventh switch S7 is controlled to be closed, and the air conditioner is controlled to perform heating; if the second power relay coil KA2 in the temperature control circuit is energized, the eighth switch S8 is controlled to be closed, and the air conditioner is controlled to perform cooling; if the temperature transmitter in the temperature control circuit fails, the manual switch SW is switched to the forced gear, the third power relay coil KA3 is energized, and the ninth switch S9 is closed. In response to the working state of the air conditioner before the temperature transmitter fails, human intervention is performed to control the heating or cooling of the air conditioner.

[0068] In this embodiment, the temperature transmitter with an upper limit normally open output signal temperature value and a lower limit normally open output signal temperature value are respectively measured through a 2*1.5mm 2 The signal cable is connected to the DI switch input card in the DCS or PLC system cabinet to perform program configuration and upper screen production, and set a 300-second delayed alarm function. When the temperature value of the temperature transmitter with an upper limit normally open output signal and the temperature value of the lower limit normally open output signal are triggered for more than 300 seconds, the DCS or PLC system screen will alarm to remind the control room personnel that the warehouse temperature is abnormal.

[0069] The utility model introduces an automatic temperature control circuit into the air-conditioning working circuit, so that the conventional air-conditioning can automatically start and stop within a temperature range and realize wide temperature control. The air-conditioning can maintain a relatively long stop time and almost consumes no electricity during the stop process, thus solving the problem of power consumption of conventional air-conditioning, reducing energy consumption to the greatest extent and saving costs.

[0070] like Figure 2 As shown, the utility model also provides a control system for a warehouse air conditioner, the system includes the control device for the warehouse air conditioner and the air conditioner main control circuit as described above, wherein:

[0071] The air conditioner main control circuit controls the working mode of the air conditioner in response to the control signal of the control device of the warehouse air conditioner.

[0072] The air conditioner main control circuit includes an air conditioner KT, a seventh switch S7, an eighth switch S8 and a ninth switch S9, wherein:

[0073] A first end of the seventh switch S7 is connected to the third power supply end, and a second end of the seventh switch S7 is connected to the first input end of the air conditioner, for controlling the air conditioner KT to heat;

[0074] A first end of the eighth switch S8 is connected to the third power supply end, and a second end of the eighth switch S8 is connected to the second input end of the air conditioner, for controlling the air conditioner KT to cool;

[0075] A first end of the ninth switch S9 is connected to the third power supply end, and a second end of the ninth switch S9 is connected to the third input end of the air conditioner, for controlling the air conditioner KT to heat or cool;

[0076] The second end of the air conditioner KT is connected to the fourth power supply end.

[0077] When the heating gear circuit of the warehouse air conditioner control device is turned on, the seventh switch S7 is closed to control the air conditioner KT to heat;

[0078] When the cooling gear circuit of the warehouse air conditioner control device is turned on, the eighth switch S8 is closed to control the air conditioner KT to cool;

[0079] When the forced gear circuit of the warehouse air conditioner control device is turned on, the ninth switch S9 is closed to control the air conditioner KT to heat or cool;

[0080] When the forced gear circuit is turned on, if the air conditioner was in cooling state before the temperature transmitter suddenly fails, the manual switch SW is switched to the forced gear, and the air conditioner is controlled to perform cooling work in response to the external cooling control level signal; if the air conditioner was in heating state before the temperature transmitter suddenly fails, the manual switch SW is switched to the forced gear, and the air conditioner is controlled to perform heating work in response to the external heating control level signal.

[0081] The temperature of the warehouse air conditioner is controlled outside the preset temperature range by the temperature control circuit of the control device of the warehouse air conditioner to achieve the adjustment of the warehouse temperature.

[0082] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0083] It should also be noted that, in the description of the present utility model, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A control device for a warehouse air conditioner, characterized in that: The device includes a manual switch, a temperature control circuit and a temperature transmitter, wherein: The manual switch includes a heating gear, a cooling gear and a forced gear, the temperature control circuit includes a heating gear circuit, a cooling gear circuit and a forced gear circuit, and the manual switch is used to switch the heating gear circuit, the cooling gear circuit or the forced gear circuit in response to user operation, wherein: The first end of the heating gear is connected to the first end of the heating gear circuit, the second end of the heating gear is connected to the first power supply end, and the second end of the heating gear circuit is connected to the second power supply end; The first end of the refrigeration gear is connected to the first end of the refrigeration gear circuit, the second end of the refrigeration gear is connected to the first power supply end, and the second end of the refrigeration gear circuit is connected to the second power supply end; The first end of the forced gear is connected to the first end of the forced gear circuit, the second end of the forced gear is connected to the first power supply end, the second end of the forced gear circuit is connected to the second power supply end, and the forced gear circuit is turned on when the manual switch is switched to the forced gear, so that the air conditioner can control heating or cooling of the air conditioner in response to an external control signal; The temperature transmitter is used to send a control level signal to the heating gear circuit and the cooling gear circuit in response to the detected current ambient temperature in the warehouse being outside the preset temperature range, so as to control the conduction of the heating gear circuit or the cooling gear circuit, thereby allowing the air conditioner to heat or cool.

2. The device according to claim 1, characterized in that The heating gear circuit includes a first power relay coil, a first switch, a third switch and a fourth switch. The first end of the fourth switch is connected to the first end of the heating gear, the second end of the fifth switch is connected to the first end of the third switch, and is also connected to the first end of the first switch; The first end of the first power relay coil is connected to the second end of the third switch and also to the second end of the first switch. The second end of the first power relay coil is connected to the second power supply end. The first power relay coil is used to control the first switch.

3. The device according to claim 1, characterized in that The cooling gear circuit includes a second power relay coil, a second switch, a fifth switch and a sixth switch. The first end of the fifth switch is connected to the first end of the cooling gear, the second end of the fifth switch is connected to the first end of the sixth switch, and is also connected to the first end of the second switch; The first end of the second power relay coil is connected to the second end of the sixth switch and also connected to the second end of the second switch. The second end of the second power relay coil is connected to the second power supply end. The second power relay coil is used to control the second switch.

4. The device according to claim 1, characterized in that The forced gear includes a third power relay coil, The first end of the third power relay coil is connected to the first end of the forced gear, and the second end of the third power relay coil is connected to the second power supply end.

5. The device according to claim 1, characterized in that The device also includes a first relay coil and a second relay coil, The first end of the first relay coil is connected to the second end of the sixth switch, and the second end is connected to the second power supply end, and the first relay coil is used to control the fourth switch; The first end of the second relay coil is connected to the second end of the third switch, and the second end of the second relay coil is connected to the second power supply end. The second relay coil is used to control the fifth switch.

6. The device according to claim 1, characterized in that The heating gear circuit includes a first self-locking circuit, and the cooling gear circuit includes a second self-locking circuit.

7. The device according to claim 1, characterized in that The first power supply is a DC power supply, and its voltage value is 0-24VDC.

8. A warehouse air conditioning control system, characterized in that: The system comprises a warehouse air conditioner control device and an air conditioner main control module as described in any one of claims 1 to 7, wherein: The air conditioner main control module controls the working mode of the air conditioner in response to the control signal of the control device of the warehouse air conditioner.

9. The system according to claim 8, characterized in that The air conditioner main control module includes an air conditioner, a seventh switch, an eighth switch and a ninth switch, wherein: The first end of the seventh switch is connected to the third power supply end, the second end of the seventh switch is connected to the first input end of the air conditioner, and the seventh switch is used to control the heating of the air conditioner; The first end of the eighth switch is connected to the third power supply end, the second end of the eighth switch is connected to the second input end of the air conditioner, and the eighth switch is used to control the cooling of the air conditioner; The first end of the ninth switch is connected to the third power supply end, the second end of the ninth switch is connected to the third input end of the air conditioner, and the ninth switch is used to control the heating or cooling of the air conditioner.

10. The system according to claim 8, characterized in that When the heating gear circuit of the control device of the warehouse air conditioner is turned on, the seventh switch is closed to control the air conditioner to heat; When the refrigeration gear circuit of the control device of the warehouse air conditioner is turned on, the eighth switch is closed to control the air conditioner to refrigerate; When the forced gear circuit of the control device of the warehouse air conditioner is turned on, the ninth switch is closed to control the air conditioner to heat or cool.

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