Heating control circuit and temperature control equipment

Abstract

The utility model discloses a heating control circuit and a temperature control device, and the heating control circuit comprises a first switch assembly which comprises a first coil, a first contact and a second contact, the first end of the first contact is used for being connected with a power supply, and the second end of the first contact is used for being connected with a water pump; the second switch assembly comprises a second coil and a third contact, the first end of the second contact is used for being connected with the power supply, and the second end of the second contact is used for being connected with the heating assembly; the controller is electrically connected with the first coil and the second coil, and the third contact is connected between the second coil and the controller in series; the technical scheme of the utility model aims to improve the safety and reliability in electric heating control.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control equipment technical field especially relates to a heating control circuit and temperature control equipment. BACKGROUND

[0002] At present, for temperature control equipment, electric heating control problem and electric heating safety problem have been a problem that all fields are worried about, and the uncertainty of application scene makes the related design type of electric heating be various, if when meeting the exception, electric heating causes the problem of design to lead to unable to realize reasonable control, and it is easy to produce dry burning and the like, even some safety problems. UTILITY MODEL CONTENTS

[0003] The utility model discloses a heating control circuit and temperature control equipment, which aims to improve the safety and reliability in electric heating control.

[0004] To achieve the above object, the heating control circuit provided by the utility model comprises:

[0005] A first switch assembly comprises a first coil, a first contact and a second contact, a first end of the first contact is used for connecting a power supply, and a second end of the first contact is used for connecting a water pump;

[0006] A second switch assembly comprises a second coil and a third contact, a first end of the second contact is used for connecting the power supply, and a second end of the second contact is used for connecting a heating assembly;

[0007] A controller is electrically connected to the first coil and the second coil respectively, and the third contact is connected in series between the second coil and the controller;

[0008] The controller is used for controlling the second contact and the third contact through the second coil to drive / stop driving the water pump to work, and when the second contact and the third contact are controlled to be closed, the third contact is controlled to be closed through the second coil, and the heating assembly is driven to work.

[0009] In some embodiments, the number of the second switch assemblies is multiple, and the heating assemblies connected by the multiple second switch assemblies are different from each other.

[0010] The controller is also used for detecting the water temperature of a water tank where the water pump is located, and when the first contact and the second contact are controlled to be closed, the corresponding heating assemblies are driven to work alternately or simultaneously according to the detected water temperature of the water tank through the multiple second switch assemblies.

[0011] In some embodiments, the heating control circuit further comprises:

[0012] a third switch assembly comprising a third coil electrically connected to the controller and a fourth contact point having a first end for accessing the power supply and a second end connected to the first end of the second contact point;

[0013] the controller is further configured to drive the third coil to control the fourth contact point to access / stop accessing the third contact point according to the detected water temperature of the water tank.

[0014] In some embodiments, the heating control circuit further comprises:

[0015] an associated contact group configured to be turned on / off according to the connection state of the first contact and the second contact, or according to the connection state of the first contact and the fourth contact;

[0016] a fourth switch assembly comprising a fourth coil and a fifth contact point, the fourth coil and the associated contact group being connected in series between the neutral line of the power supply and the live line of the power supply, the fifth contact point having a first end for accessing the power supply and a second end connected to the first end of the fourth contact point;

[0017] the fourth coil is configured to control the fifth contact point to disconnect the power supply from the fourth contact point when the associated contact group is turned on.

[0018] In some embodiments, the associated contact group comprises a first associated contact point and a second associated contact point connected in series;

[0019] wherein the connection state of the first associated contact point is different from the connection state of the first contact, and the connection state of the second associated contact point is the same as the connection state of the second contact.

[0020] In some embodiments, the associated contact group comprises a third associated contact point and a fourth associated contact point connected in series;

[0021] wherein the connection state of the third associated contact point is different from the connection state of the first contact, and the connection state of the fourth associated contact point is the same as the connection state of the fourth contact.

[0022] In some embodiments, the power supply comprises a main power supply and a backup power supply, and the heating control circuit further comprises:

[0023] a power supply switching circuit having a first input end for accessing the main power supply, a second input end for accessing the backup power supply, and an output end connected to the first end of the first contact and the first end of the second contact, respectively;

[0024] The power switching circuit is used for switching output of the main power supply and the standby power supply to maintain power supply.

[0025] In some embodiments, the power switching circuit comprises:

[0026] The fifth switch group comprises a fifth coil, a sixth contact and a seventh contact, a first end of the sixth contact is used for accessing the power supply, and a second end of the sixth contact is connected with the first end of the first contact and the first end of the second contact respectively;

[0027] The sixth switch group comprises a sixth coil, an eighth contact and a ninth contact, a first end of the eighth contact is used for accessing the power supply, a second end of the eighth contact is connected with the second end of the sixth contact, the sixth coil and the seventh contact are commonly connected in series between the live wire of the standby power supply and the zero line of the standby power supply, and the ninth contact and the fifth coil are commonly connected in series between the live wire of the main power supply and the zero line of the main power supply.

[0028] In some embodiments, the power switching circuit further comprises:

[0029] The seventh switch group comprises a seventh coil, a tenth contact and an eleventh contact, the seventh coil is connected in series between the live wire of the main power supply and the zero line of the main power supply, the tenth contact and the sixth coil and the seventh contact are commonly connected in series between the live wire of the standby power supply and the zero line of the standby power supply, and the eleventh contact and the ninth contact and the fifth coil are commonly connected in series between the live wire of the main power supply and the zero line of the main power supply.

[0030] The seventh coil is used for controlling the eleventh contact to maintain access of the main power supply and controlling the tenth contact to disconnect access of the standby power supply when the main power supply is accessed.

[0031] The utility model discloses still propose a temperature control equipment, including water pump, heating assembly and above-mentioned heating control circuit, heating control circuit is connected with water pump, heating assembly electricity respectively.

[0032] The utility model technical scheme through with second contact and second coil series connection in the same current loop, make heating assembly and water pump in mechanical structure adopt interlocking structure, make second switch subassembly unable when first switch subassembly does not control water pump work, heating assembly accesses power supply, thereby avoid the condition of dry burning of electric heating, reduce the security problem produced when electric heating control, improve the security and reliability in electric heating control. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0034] Figure 1 The structure diagram of an embodiment of the heating control circuit of the present application;

[0035] Figure 2 The structure diagram of an embodiment of the plurality of heating components in the present application;

[0036] Figure 3 The structure diagram of another embodiment of the heating control circuit of the present application;

[0037] Figure 4 The structure diagram of still another embodiment of the heating control circuit of the present application;

[0038] Figure 5 The structure diagram of an embodiment of the associated contact group in the present application;

[0039] Figure 6 The structure diagram of another embodiment of the associated contact group in the present application;

[0040] Figure 7 The structure diagram of an embodiment of the power switching circuit in the present application;

[0041] Figure 8 The structure diagram of another embodiment of the power switching circuit in the present application;

[0042] Figure 9 The structure diagram of still another embodiment of the heating control circuit of the present application.

[0043] Explanation of the reference signs:

[0044] Reference Name Reference Name 10 Controller L1-L7 First coil to seventh coil 20 Associated contact group K1-K11 First contact to eleventh contact 30 Power switching circuit J1-J4 First associated point to fourth associated point

[0045] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0047] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0048] The present application provides a heating control circuit.

[0049] Referring to Figure 1 In an embodiment, the heating control circuit comprises:

[0050] The first switch assembly comprises a first coil L1 and first and second contacts K1 and K2, a first end of the first contact K1 is used for connecting to a power supply, and a second end of the first contact K1 is used for connecting to a water pump.

[0051] The second switch assembly comprises a second coil L2 and a third contact K3, a first end of the second contact K2 is used for connecting to the power supply, and a second end of the second contact K2 is used for connecting to a heating assembly.

[0052] The controller 10 is electrically connected to the first coil L1 and the second coil L2 respectively, and the third contact is connected in series between the second coil L2 and the controller 10.

[0053] The controller 10 is used for controlling the second contact K2 and the third contact K3 through the second coil L2 to drive / stop driving the water pump to work, and when the second contact K2 and the third contact K3 are controlled to be closed, the third contact K3 is controlled to be closed through the second coil L2 to drive the heating assembly to work.

[0054] In the embodiment, the first switch assembly can be a contactor or a relay.

[0055] It can be understood that the heating control circuit of the present application is used in temperature control equipment such as water heaters, air conditioners, etc., in which a water pump connected with a water pipe and a heating assembly arranged in a water tank are included.

[0056] After the temperature control equipment is connected to a power supply, the controller 10 is powered on to start controlling the first switch assembly and the second switch assembly. In the present heating control circuit, the first switch assembly is used to control the working state of the water pump, and the second switch assembly is used to control the working state of the heating assembly, and by connecting the second contact K2 and the second coil L2 in the same current loop, the heating assembly can be locked when the water pump is not turned on.

[0057] Specifically, if the controller 10 receives a heating instruction output by an interactive component such as a touch screen, a remote controller, a key panel, or detects that the water temperature in the water tank is lower than a preset water temperature, etc., and needs to control the heating assembly to work, since the first contact K1 is a normally open contact, the controller 10 energizes the first coil L1 to control the first contact K1 to close, connecting the power supply to the water pump to drive the water pump to work. When the water pump is connected, the first coil L1 simultaneously closes the second contact K2, and at this time the controller 10 can control the third contact K3 to close by energizing the second coil L2, connecting the power supply to the heating assembly, so that the heating assembly heats the water in the water tank.

[0058] When the water pump fails due to a fault of the first switch assembly, the first contact K1 cannot normally close, and since the second contact K2 is linked with the first contact K1, the second contact K2 is also in an open state, so the current loop in which the second coil L2 is located is disconnected, and the third contact K3 cannot be closed to drive the heating assembly to work. Thus, only when the first contact K1 connected with the water pump is closed can the electric heating be started, that is, only when the water pump is started can the heating assembly be started, and the heating assembly and the water pump are connected in a mechanical interlocking structure, so that the problem of dry burning without water in fast heating electric heating is avoided.

[0059] The technical scheme of the present application connects the second contact K2 and the second coil L2 in the same current loop, and connects the heating assembly and the water pump in a mechanical interlocking structure, so that the second switch assembly cannot connect the heating assembly to the power supply when the first switch assembly does not control the water pump to work, thereby avoiding the problem of dry burning without water in electric heating, reducing safety problems in electric heating control, and improving the safety and reliability of electric heating control.

[0060] Further, a temperature limiter and a fuse are connected in series in the loop in which the second coil L2 is located, and when the temperature limiter and the fuse are disconnected, the electric heating cannot be started.

[0061] Reference Figure 2In an embodiment, the second switch assembly is multiple in number; wherein the heating assemblies accessed by the multiple second switch assemblies are all different;

[0062] The controller 10 is also configured to detect the water temperature of the water tank in which the water pump is located, and when the first contact K1 and the second contact K2 are controlled to be closed, the corresponding heating assemblies are driven to work alternately or simultaneously according to the detected water temperature of the water tank through the multiple second switch assemblies.

[0063] In the embodiment, the controller 10 is further integrated with a temperature detection module, which is configured to collect the water temperature of the water tank to determine the heating demand according to the current water temperature.

[0064] Specifically, the heating demand can include two controls, and the two controls can be realized by presetting a reference water temperature in the controller 10, wherein the reference water temperature is set by the researchers according to the actual demand. When it is detected that the water temperature of the water tank is higher than the reference water temperature, it is determined that the heating demand of the water tank is small, and at this time the controller 10 only needs to control a group of heating assemblies to work; when it is detected that the water temperature of the water tank is lower than the reference water temperature, it is determined that the heating demand of the water tank is small, and at this time the controller 10 only needs to control multiple heating assemblies to be turned on, thereby achieving the effect of intelligent energy saving.

[0065] Taking the number of the heating assemblies as two for example, when the heating demand of the water tank is small, the third contact K3 of the two second switch assemblies is controlled to be closed alternately in a preset period (such as 15 minutes, 30 minutes, 1 hour, etc.), so as to control the two heating assemblies to work alternately (heating assembly 1 is turned on in the last period, and heating assembly 2 is turned on in the next period), thereby avoiding that the single load is too large.

[0066] In addition, when one heating assembly is controlled to work alone, if it is detected by current detection, power detection or the like that the heating assembly fails to be turned on, another group of heating assemblies can be switched to work immediately.

[0067] Referring to Figure 3 and Figure 9 In an embodiment, the heating control circuit further comprises:

[0068] The third switch assembly comprises a third coil L3 and a fourth contact, the third coil L3 is electrically connected with the controller 10, and the first end of the fourth contact is used for accessing the power supply, and the second end of the fourth contact is connected with the first end of the second contact K2;

[0069] The controller 10 is also configured to drive the third coil L3 to control the fourth contact according to the detected water temperature of the water tank, so as to access / stop accessing the third contact K3 with the power supply.

[0070] In the embodiment, the temperature detection module integrated in the controller 10 can include a temperature sensor, an RTC thermistor, etc. The controller 10 can receive the target water temperature set by the user through the interaction with the touch screen, the key panel, etc., and compare the target water temperature with the detected water temperature of the water tank through the internally integrated comparator.

[0071] When it is detected that the water temperature of the water tank is lower than the target water temperature, the water in the water tank needs to be heated, the controller 10 energizes the third coil L3 and controls the fourth contact point to be connected, so that the power supply can access the heating assembly when the third contact K3 is closed, to drive the heating assembly to work; when it is detected that the water temperature of the water tank is higher than the target water temperature, the water in the water tank does not need to be heated, the controller 10 stops energizing the third coil L3 and controls the fourth contact point to be disconnected, so that the power supply cannot access the third contact K3, and the heating assembly is protected redundantly by connecting two contactors in series in the current loop where the heating assembly is located, and the possibility of abnormality is lower, thereby increasing the reliability of the control of the heating assembly.

[0072] With reference to Figure 4 , Figure 5 and Figure 9 In an embodiment, the heating control circuit further comprises:

[0073] an associated contact group 20, which is connected / disconnected according to the connection state of the first contact K1 and the second contact K2, or is connected / disconnected according to the connection state of the first contact K1 and the fourth contact;

[0074] a fourth switch assembly, which includes a fourth coil L4 and a fifth contact K5, the fourth coil L4 and the associated contact group 20 are connected in series between the zero line of the power supply and the live line of the power supply in turn, and the first end of the fifth contact K5 is used to access the power supply, and the second end of the fifth contact is connected with the first end of the fourth contact K4;

[0075] The fourth coil L4 is used to control the fifth contact K5 to disconnect the power supply and the fourth contact when the associated contact group 20 is connected.

[0076] In the embodiment, the fifth contact K5 is used in combination with a split release and a circuit breaker, and the fourth coil L4 is a split release coil.

[0077] According to the above embodiment, the heating assembly and the water pump are interlocked through the first switch assembly and the second switch assembly. Only when the water pump is turned on, the third contact K3 of the second switch assembly can be closed to conduct. When the water pump is turned on, the associated contact group 20 is disconnected. When the third contact K3 and / or the fourth contact K4 of the third contact K3 connected to the power supply abnormally stick together, the water continues to flow, and the heat generated by the heating assembly can be carried away by the water flow in real time, and the risk of accidental high temperature caused by electric heating dry burning is avoided.

[0078] When the water pump is turned off, the first contact K1 is disconnected, and when the second contact K2 and / or the third contact K3 abnormally stick together and are closed, the associated contact group 20 is closed, the current loop in which the fourth coil L4 is located is connected, and the fifth contact K5 is controlled to be disconnected through the fourth coil L4, that is, the auxiliary release coil is electrified and attracted, the auxiliary release operates, and the circuit breaker operates to cut off the main circuit connected to the power supply.

[0079] Optionally, when the third contact K3 is provided with an anti-sticking setting, the associated contact group 20 includes a first associated point J1 and a second associated point J2 connected in series;

[0080] The connection state of the first associated point J1 is different from the connection state of the first contact K1, and the connection state of the second associated point J2 is the same as the connection state of the third contact K3.

[0081] In another embodiment, when the fourth contact K4 is provided with an anti-sticking setting, the associated contact group 20 includes a third associated point J3 and a fourth associated point J4 connected in series;

[0082] The connection state of the third associated point J3 is different from the connection state of the first contact K1, and the connection state of the fourth associated point J4 is the same as the connection state of the fourth contact K4.

[0083] Further, the associated contact group 20 can also be connected in series with a water flow switch. The water flow switch is of a normally closed type, and when a certain flow of water flows through, the water flow switch is in a disconnected state. The water flow switch is placed at the front end of the heating assembly and the rear end of the water pump, and is used to detect whether a certain flow of water flows through the water pump and the fast heating water heater.

[0084] Reference Figure 6 In an embodiment, the power supply includes a main power supply and a backup power supply, and the heating control circuit further includes:

[0085] A power supply switching circuit 30, a first input end of which is used to access the main power supply, a second input end of which is used to access the backup power supply, and an output end of which is connected to the first end of the first contact K1 and the first end of the second contact K2, respectively;

[0086] The power switching circuit 30 is used for switching the main power supply and the standby power supply to output, so as to maintain power supply.

[0087] In the embodiment, the power switching circuit 30 is connected to the main power supply and the standby power supply respectively. When the main power supply normally outputs, the power switching circuit 30 directly outputs the connected main power supply as the power supply. When the main power supply abnormally outputs, the power switching circuit 30 quickly switches to the standby power supply to output, so as to continuously meet the functional requirements of the equipment in real time.

[0088] Referring to Figure 7 and Figure 9 In an embodiment, the power switching circuit 30 comprises:

[0089] The fifth switch group comprises a fifth coil L5, a sixth contact K6 and a seventh contact K7. The first end of the sixth contact K6 is used for connecting to the power supply. The second end of the sixth contact K6 is connected to the first end of the first contact K1 and the first end of the second contact K2 respectively.

[0090] The sixth switch group comprises a sixth coil L6, an eighth contact K8 and a ninth contact K9. The first end of the eighth contact K8 is used for connecting to the power supply. The second end of the eighth contact K8 is connected to the second end of the sixth contact K6. The sixth coil L6 and the seventh contact K7 are commonly connected in series between the live wire of the standby power supply and the zero line of the standby power supply. The ninth contact K9 and the fifth coil L5 are commonly connected in series between the live wire of the main power supply and the zero line of the main power supply.

[0091] In the embodiment, the fifth switch group is used for controlling the connection of the main power supply. The sixth switch group is used for controlling the connection of the standby power supply. The sixth contact K6 of the fifth switch group and the eighth contact K8 of the sixth switch group are connected in parallel at the rear end, so that the main power supply and the standby power supply can supply power to the unit when outputting. At the same time, the fifth switch group and the sixth switch group use mechanical interlocking, so that the main power supply and the standby power supply can be switched immediately when any one of them loses power, and the situation that the fifth switch group and the sixth switch group act simultaneously and cause short circuit can be avoided.

[0092] Specifically, when the main power supply normally outputs, the following situations are executed:

[0093] The ninth contact K9 and the seventh contact K7 are normally closed contacts. When the main power supply inputs, the fifth coil L5 is powered, the seventh contact K7 is disconnected, and the sixth coil L6 cannot be powered. Since the sixth contact K6 and the eighth contact K8 are normally open contacts, the sixth contact K6 is closed under the control of the fifth coil L5 to connect the main power supply. The eighth contact K8 remains disconnected, and the unit is powered by the main power supply.

[0094] In the case of abnormal power failure of the main power supply, the following is executed:

[0095] The fifth coil L5 cannot be powered, the seventh contact K7 is closed, the sixth contact K6 is disconnected, the standby power supply is connected to the sixth coil L6 to make it powered, the sixth coil L6 controls the ninth contact K9 to be disconnected, at the same time, the sixth coil L6 controls the eighth contact K8 to be closed to connect the standby power supply to the rear-end load, and the unit is powered by the standby power supply.

[0096] The seventh contact K7 and the ninth contact K9 are respectively connected in series in two control circuits, and function as a control interlock.

[0097] In addition, the fifth coil L5 and the sixth coil L6 are respectively connected in series with a safety tube, which functions as a protection control circuit.

[0098] Referring to Figure 8 and Figure 9 In an embodiment, the power supply switching circuit 30 further comprises:

[0099] A seventh switch group comprising a seventh coil L7, a tenth contact K10 and an eleventh contact K11, the seventh coil L7 is connected in series between the live wire of the main power supply and the zero wire of the main power supply, the tenth contact K10 is connected in series with the sixth coil L6 and the seventh contact K7 between the live wire of the standby power supply and the zero wire of the standby power supply, and the eleventh contact K11 is connected in series with the ninth contact K9 and the fifth coil L5 between the live wire of the main power supply and the zero wire of the main power supply.

[0100] The seventh coil L7 is used to control the eleventh contact K11 to maintain the connection of the main power supply and control the tenth contact K10 to disconnect the connection of the standby power supply when the main power supply is connected.

[0101] Specifically, when the main power supply and the standby power supply are connected at the same time, the following is executed:

[0102] The tenth contact K10 is a normally closed contact, and the eleventh contact K11 is a normally open contact. When the seventh coil L7 is powered, the tenth contact K10 is disconnected and the eleventh contact K11 is closed. At this time, the fifth coil L5 is powered, and the above-mentioned main power supply control process is entered.

[0103] In the case of abnormal power failure of the main power supply, the following is executed:

[0104] The seventh coil L7 cannot be powered, the eleventh contact K11 is disconnected, the tenth contact K10 is closed, the circuit in which the fifth coil L5 is located is disconnected, and the above-mentioned standby power supply control process is entered.

[0105] The tenth contact K10 and the eleventh contact K11 corresponding to the seventh coil L7 are connected in series in two control circuits, and play a role of control interlocking, and the seventh switch group is added as a mechanical interlocking connecting rod between the fifth switch group and the sixth switch group, and plays a role of mechanical interlocking.

[0106] In addition, the seventh coil L7 is connected in series in the main power control circuit, and also plays a role of priority conduction of the main power circuit.

[0107] The utility model discloses still propose a kind of temperature control equipment, and the temperature control equipment includes water pump, heating component and above-mentioned heating control circuit, and the heating control circuit is respectively with the water pump, the heating component electric connection, the specific structure of this heating control circuit refers to above-mentioned embodiment, since the temperature control equipment of the utility model adopts all technical solutions of above-mentioned all embodiments, thus at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer repeat.

[0108] The above-mentioned is only optional embodiment of the utility model, and not therefore limit the patent range of the utility model, is made in the utility model concept of the utility model under, utilize the equivalent structural transformation of utility model specification and attached drawing contents, or direct / indirectly apply in other related technical field all include in the patent protection range of the utility model.

Claims

1. A heating control circuit, characterized by, The application relates to a heating control circuit. The heating control circuit comprises: a first switch assembly, which comprises a first coil and a first contact and a second contact, a first end of the first contact being used for connecting to a power supply, and a second end of the first contact being used for connecting to a water pump; a second switch assembly, which comprises a second coil and a third contact, a first end of the third contact being used for connecting to the power supply, and a second end of the third contact being used for connecting to a heating assembly; a controller, which is electrically connected to the first coil and the second coil respectively, and the third contact is connected in series between the second coil and the controller; 2. The heating control circuit of claim 1, wherein, the controller is used for controlling the second contact and the third contact through the second coil to drive / stop driving the water pump to work, and when the second contact and the third contact are controlled to be closed, the third contact is controlled to be closed through the second coil to drive the heating assembly to work. The number of the second switch assemblies is plural; wherein the heating assemblies connected by the plural second switch assemblies are different from each other; 3. The heating control circuit of claim 2, wherein, the controller is further used for detecting the water temperature of a water tank in which the water pump is located, and when the first contact and the second contact are controlled to be closed, the corresponding heating assemblies are driven to work alternately or simultaneously according to the detected water temperature of the water tank through the plural second switch assemblies. The heating control circuit further comprises: a third switch assembly, which comprises a third coil and a fourth contact, the third coil being electrically connected to the controller, and a first end of the fourth contact being used for connecting to the power supply, and a second end of the fourth contact being connected to the first end of the third contact; 4. The heating control circuit of claim 3, wherein, the controller is further used for driving the third coil to control the fourth contact to connect / disconnect the power supply to the third contact according to the detected water temperature of the water tank. The heating control circuit further comprises: a related contact group, which is used for being turned on / off according to the connection state of the first contact and the second contact, or being turned on / off according to the connection state of the first contact and the fourth contact; a fourth switch assembly, which comprises a fourth coil and a fifth contact, the fourth coil and the related contact group being connected in series between a zero line of the power supply and a live line of the power supply in sequence, a first end of the fifth contact being used for connecting to the power supply, and a second end of the fifth contact being connected to the first end of the fourth contact; 5. The heating control circuit of claim 4, wherein, the fourth coil is used for controlling the fifth contact to disconnect the power supply from the fourth contact when the related contact group is turned on. The related contact group comprises a first related contact and a second related contact connected in sequence; 6. The heating control circuit of claim 4, wherein, wherein the connection state of the first related contact is different from the connection state of the first contact, and the connection state of the second related contact is the same as the connection state of the second contact. The related contact group comprises a third related contact and a fourth related contact connected in sequence; 7. The heating control circuit of claim 1, wherein, wherein the connection state of the third related contact is different from the connection state of the first contact, and the connection state of the fourth related contact is the same as the connection state of the fourth contact. The power supply comprises a main power supply and a backup power supply, and the heating control circuit further comprises: A power switching circuit, a first input end of which is used for accessing the main power supply, a second input end of which is used for accessing the backup power supply, and an output end of which is connected with the first end of the first contact and the first end of the second contact respectively; The power switching circuit is used for switching the output of the main power supply and the backup power supply to maintain power supply.

8. The heating control circuit of claim 7, wherein, The power switching circuit comprises: A fifth switch group comprising a fifth coil, a sixth contact and a seventh contact, a first end of the sixth contact being used for accessing the power supply, and a second end of the sixth contact being connected with the first end of the first contact and the first end of the second contact respectively; A sixth switch group comprising a sixth coil, an eighth contact and a ninth contact, a first end of the eighth contact being used for accessing the power supply, a second end of the eighth contact being connected with the second end of the sixth contact, the sixth coil and the seventh contact being connected in series between the live wire of the backup power supply and the zero line of the backup power supply, and the ninth contact and the fifth coil being connected in series between the live wire of the main power supply and the zero line of the main power supply.

9. The heating control circuit of claim 8, wherein, The power switching circuit further comprises: A seventh switch group comprising a seventh coil, a tenth contact and an eleventh contact, the seventh coil being connected in series between the live wire of the main power supply and the zero line of the main power supply, the tenth contact and the sixth coil and the seventh contact being connected in series between the live wire of the backup power supply and the zero line of the backup power supply, and the eleventh contact and the ninth contact and the fifth coil being connected in series between the live wire of the main power supply and the zero line of the main power supply; The seventh coil is used for controlling the eleventh contact to maintain the access of the main power supply and controlling the tenth contact to disconnect the access of the backup power supply when the main power supply is accessed.

10. A temperature control device, characterized by, A heating control circuit as claimed in any one of claims 1-9, a water pump, and a heating assembly, the heating control circuit being electrically connected with the water pump and the heating assembly respectively.

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