Constant-temperature cold end controller

Abstract

The utility model provides a constant-temperature cold-end controller, which relates to the field of controllers and comprises a shell, a thermocouple and a controller body. The interior of the shell is hollow; the controller body is arranged in the shell; the cold end of the thermocouple is connected with the controller body; the working end of the thermocouple penetrates through the shell and extends out of the shell; a heat insulation plate is arranged in the shell; the thermocouple penetrates through the heat insulation plate; a first temperature sensor is arranged on the plate surface, close to the controller body, of the heat insulation plate; a fan is arranged on the front end surface of the shell; a ventilation opening is formed in the top of the shell; a second temperature sensor is arranged in the shell; the detection part of the second temperature sensor is located on the axis of the fan. According to the utility model, the problem that the temperature of the cold end of the thermocouple is increased due to the influence of heat emitted by the heating equipment when the thermocouple is used near the heating equipment in the prior art, so that the temperature rise of the heating equipment is continuously controlled to exceed the pipeline temperature required to be maintained can be solved, and accurate and stable temperature control is realized.

Description

Technical Field

[0001] The utility model relates to the field of controllers, in particular to a constant temperature cold end controller. Background Art

[0002] A thermostat is a device that automatically controls temperature based on the actual temperature detected by a temperature sensor and compared with the set target temperature, and then outputs a control signal to adjust the workload of the heating or cooling equipment to maintain the desired constant temperature.

[0003] There is a patent in the prior art, such as Chinese patent application number 202023144323.8, which discloses a specific structure of a portable and compact temperature controller, including a lower shell, a thermocouple and an upper shell, a device slot is provided in the middle position at the top end of the lower shell, a controller is installed on one side of the bottom end of the equipment slot, a storage is installed on the controller side at the bottom end of the equipment slot, an alarm is installed on the storage side at the bottom end of the equipment slot, a battery panel is installed on the alarm side at the bottom end of the equipment slot, a signal transceiver is installed on the battery panel side at the bottom end of the equipment slot, and the upper shell is installed at the top end of the lower shell; the above-mentioned temperature controller can achieve temperature control effect.

[0004] However, when using the temperature controller provided by the above patent to monitor pipeline heating, the heating device is tied to the pipeline so that the working end of the thermocouple is in contact with the pipeline. If the temperature of the working end is higher than the room temperature and the temperature controller is near the heating device, the temperature of the cold end is increased by the heat emitted by the heating device. At this time, the temperature difference between the working end and the cold end monitored by the thermocouple deviates, making the detected temperature difference smaller, so that the pipeline temperature obtained by the temperature controller is smaller, which will cause the temperature controller to continue to control the heating device to heat up, exceeding the pipeline temperature that needs to be maintained. Utility Model Content

[0005] In response to the above-mentioned problems, the utility model provides a constant temperature cold end controller, which can solve the problem that when the prior art is used near a heating device, the temperature of the cold end of the thermocouple is increased due to the heat emitted by the heating device, thereby continuing to control the heating device to heat up and exceeding the required pipe temperature to be maintained, thereby achieving accurate and stable temperature control.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a constant temperature cold end controller, comprising a shell, a thermocouple and a controller body; the shell is hollow inside; the controller body is arranged inside the shell; the controller body and the shell are relatively fixed; the cold end of the thermocouple is connected to the controller body; the working end of the thermocouple passes through the shell and extends to the outside of the shell;

[0008] The side of the shell with the thermocouple is used as the rear side of the shell; a heat insulation board is arranged in the shell; the heat insulation board is located between the controller body and the rear end face of the shell; the heat insulation board separates the controller body and the rear end face of the shell; the thermocouple passes through the heat insulation board; a first temperature sensor is arranged on the board surface of the heat insulation board close to the controller body; the first temperature sensor is electrically connected to the controller body;

[0009] A fan is arranged on the front end surface of the shell; the fan faces the heat insulation board; the fan is electrically connected to the controller body; a vent is arranged on the top of the shell; the vent is located in front of the heat insulation board; a second temperature sensor is arranged inside the shell; the second temperature sensor is located in front of the heat insulation board; the detection part of the second temperature sensor is located on the axis of the fan; the detection part of the second temperature sensor is at the same height as the rotation center of the fan; the second temperature sensor is electrically connected to the controller body.

[0010] The constant temperature cold end controller provided by the utility model is preferably configured such that the heat insulation plate and the rear end face of the shell form a heat insulation space; a heat conduction plate is arranged in the heat insulation space; the plate surface of the heat conduction plate faces the rear end face of the shell; the heat conduction plate is tilted toward the rear end face of the shell; the thermocouple passes through the heat conduction plate; water pipes for exchanging heat are distributed on the heat conduction plate; a water tank is arranged on the outside of the shell; the water tank is located above the heat insulation space; the water inlet of the water pipe passes through the shell; the water inlet of the water pipe is communicated with the water outlet of the water tank; the water outlet of the water pipe passes through the shell; the water outlet of the water pipe is communicated with the water inlet of the water tank; a water pump is arranged at the water outlet of the water tank.

[0011] The constant temperature cold end controller provided by the utility model is preferably provided with a filter in front of the fan; the filter is detachably fixed to the shell.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] The constant temperature cold end controller provided by the utility model is provided with a heat insulation board in a shell, the heat insulation board is located between the controller body and the rear end surface of the shell, and the heat insulation board separates the controller body and the rear end surface of the shell; by providing the heat insulation board, the main heat from the rear of the constant temperature cold end controller is separated, and the heat insulation board can block the main heat source from approaching the cold end of the thermocouple, prevent the cold end of the thermocouple from being affected by the heating equipment, avoid the cold end temperature detected by the thermocouple from being higher than the room temperature, achieve the temperature difference between the working end and the cold end of the thermocouple to maintain a stable state, and achieve accurate and stable control of the temperature of the pipeline.

[0014] The utility model provides a constant temperature cold end controller, in which a fan is arranged on the front end surface of the shell, the fan faces the heat insulation board, and a vent is arranged on the top of the shell; by arranging the fan, the normal temperature air outside the constant temperature cold end controller is transported into the shell, and the continuous delivery of air into the shell can blow away and take away the heat dissipated from the heat insulation board and the surroundings, and is convenient for maintaining the temperature of the cold end connected to the thermocouple and the controller body, avoiding excessive cooling and making the temperature of the cold end of the thermocouple lower than the room temperature. The air inside the shell can be discharged from the vent on the top of the shell, reducing the heat inside the shell, maintaining the temperature at the cold end of the thermocouple stable, achieving the temperature difference between the working end and the cold end of the thermocouple to maintain a stable state, and realizing accurate and stable control of the temperature of the pipeline.

[0015] The constant temperature cold end controller provided by the utility model is provided with a second temperature sensor inside the shell in order to continuously monitor the room temperature. The detection part of the second temperature sensor is located on the axis of the fan, and the detection part of the second temperature sensor is at the same height as the rotation center of the fan, so that the second temperature sensor can obtain more accurate room temperature data and reduce the influence of the heat around the shell; a first temperature sensor is arranged on the board surface of the insulation board close to the controller body, and the first temperature sensor is used to monitor the insulation condition of the insulation board. The temperature data of the insulation board collected by the first temperature sensor is compared with the room temperature data collected by the second temperature sensor. If the temperature collected by the first temperature sensor is greater than the temperature collected by the second temperature sensor, the controller body can increase the rotation speed of the fan to maintain the temperature collected by the first temperature sensor close to the temperature collected by the second temperature sensor, so as to prevent the heat emitted by the heating device from affecting the temperature at the cold end of the thermocouple, thereby maintaining the temperature at the cold end of the thermocouple stable, achieving a stable temperature difference between the working end and the cold end of the thermocouple, and realizing accurate and stable control of the temperature of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the constant temperature cold end controller provided in Example 1 of the utility model.

[0018] Figure 2 It is a front view structural schematic diagram of the constant temperature cold end controller provided in Example 1 of the utility model.

[0019] Figure 3 It is a top view cross-sectional structural schematic diagram of the constant temperature cold end controller provided in Example 1 of the utility model.

[0020] Figure 4 It is a right side cross-sectional structural schematic diagram of the constant temperature cold end controller provided in Example 1 of the utility model.

[0021] Figure 5 It is a rear cross-sectional structural schematic diagram of the constant temperature cold end controller provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0023] Embodiment 1:

[0024] like Figure 1 and Figure 3 As shown, a constant temperature cold end controller provided by Example 1 of the utility model comprises a housing 1, a thermocouple 2 and a controller body 3; the interior of the housing 1 is hollow; the controller body 3 is arranged inside the housing 1; the controller body 3 is relatively fixed to the housing 1; the cold end of the thermocouple 2 is connected to the controller body 3; the working end of the thermocouple 2 passes through the housing 1 and extends to the outside of the housing 1;

[0025] The side of the housing 1 with the thermocouple 2 is regarded as the rear of the housing 1; a heat insulation board 4 is arranged in the housing 1; the heat insulation board 4 is located between the controller body 3 and the rear end face of the housing 1; the heat insulation board 4 separates the controller body 3 and the rear end face of the housing 1; the thermocouple 2 passes through the heat insulation board 4; a first temperature sensor 5 is arranged on the board surface of the heat insulation board 4 close to the controller body 3; the first temperature sensor 5 is electrically connected to the controller body 3;

[0026] A fan 11 is arranged on the front end surface of the shell 1; the fan 11 faces the heat insulation board 4; the fan 11 is electrically connected to the controller body 3; a vent 12 is arranged on the top of the shell 1; the vent 12 is located in front of the heat insulation board 4; a second temperature sensor 6 is arranged inside the shell 1; the second temperature sensor 6 is located in front of the heat insulation board 4; the detection part of the second temperature sensor 6 is located on the axis of the fan 11; the detection part of the second temperature sensor 6 is at the same height as the rotation center of the fan 11; the second temperature sensor 6 is electrically connected to the controller body 3.

[0027] When using the constant temperature cold end controller provided in Example 1 of the utility model, the constant temperature cold end controller is fixed relative to the monitored object. The fixing method here can be bound to the monitored object by using Velcro or the like. The monitored object here refers to the pipeline; the rear end face of the shell 1 is facing the monitored pipeline, and the working end of the thermocouple 2 is in contact with the pipeline; when the constant temperature cold end controller controls the heating device to heat the pipeline, the heat emitted by the heating device is transferred from the rear end to the front end of the constant temperature cold end controller; the heat emitted by the heating device passes through the rear end face of the shell 1 and is blocked by the insulation board 4, which can block part of the heat; at the same time, the controller itself The body 3 controls the rotation of the fan 11 set on the front end surface of the shell 1. The fan 11 draws air at room temperature from the outside of the constant temperature cold end controller into the shell 1 to blow away and take away the heat dissipated from the insulation board 4 and the surroundings, and discharges it from the vent 12 on the top of the shell 1. During this period, the room temperature data is collected by the second temperature sensor 6 and transmitted to the controller body 3; in addition, the first temperature sensor 5 can collect the temperature data of the side of the insulation board 4 close to the controller body 3. If the temperature of the side of the insulation board 4 close to the controller body 3 exceeds the room temperature data collected by the second temperature sensor 6, the controller body 3 will accelerate the rotation speed of the fan 11.

[0028] The constant temperature cold end controller provided in Example 1 of the utility model is provided with a heat insulation board 4 in the shell 1, and the heat insulation board 4 is located between the controller body 3 and the rear end surface of the shell 1, and the heat insulation board 4 separates the controller body 3 and the rear end surface of the shell 1; by providing the heat insulation board 4, the main heat from the rear of the constant temperature cold end controller is separated, and the heat insulation board 4 can block the main heat source from approaching the cold end of the thermocouple 2, prevent the cold end of the thermocouple 2 from being affected by the heating equipment, avoid the cold end temperature detected by the thermocouple 2 from being higher than the room temperature, and achieve the temperature difference between the working end and the cold end of the thermocouple 2 to maintain a stable state, so as to achieve accurate and stable control of the temperature of the pipeline.

[0029] In the constant temperature cold end controller provided by Example 1 of the utility model, a fan 11 is arranged on the front end surface of the shell 1, and the fan 11 is rotated by a motor. The motor and the inner side wall of the front end surface of the shell 1 are relatively fixed, and the fan 11 faces the insulation board 4. A vent 12 is arranged on the top of the shell 1. By arranging the fan 11, the normal temperature air outside the constant temperature cold end controller is transported to the shell 1. Continuously transporting air into the shell 1 can blow away and take away the heat dissipated from the insulation board 4 and the surroundings, and it is convenient to maintain the temperature of the cold end connected to the thermocouple 2 and the controller body 3, avoid excessive cooling, and make the temperature of the cold end of the thermocouple 2 lower than the room temperature. The air inside the shell 1 can be discharged from the vent 12 on the top of the shell 1, reduce the heat inside the shell 1, maintain the temperature at the cold end of the thermocouple 2 stable, and achieve the temperature difference between the working end and the cold end of the thermocouple 2 to maintain a stable state, so as to achieve accurate and stable control of the temperature of the pipeline.

[0030] The constant temperature cold end controller provided in Example 1 of the utility model is provided with a second temperature sensor 6 inside the shell 1 in order to continuously monitor the room temperature. The detection part of the second temperature sensor 6 is located on the axis of the fan 11, and the detection part of the second temperature sensor 6 is at the same height as the rotation center of the fan 11. At this time, the detection part of the second temperature sensor 6 is located at the center of the air inlet, so that the second temperature sensor 6 can obtain more accurate room temperature data and reduce the influence of the heat around the shell 1; the first temperature sensor 5 is provided on the board surface of the heat insulation board 4 close to the controller body 3, and the first temperature sensor 5 is used to monitor the heat insulation board 4, and compares the temperature data of the insulation board 4 collected by the first temperature sensor 5 with the room temperature data collected by the second temperature sensor 6. If the temperature collected by the first temperature sensor 5 is greater than the temperature collected by the second temperature sensor 6, the controller body 3 can increase the speed of the fan 11 to maintain the temperature collected by the first temperature sensor 5 close to the temperature collected by the second temperature sensor 6, so as to prevent the heat emitted by the heating device from affecting the temperature at the cold end of the thermocouple 2, thereby maintaining the temperature at the cold end of the thermocouple 2 stable, achieving a stable temperature difference between the working end and the cold end of the thermocouple 2, and realizing accurate and stable control of the temperature of the pipeline.

[0031] like Figures 3-4As shown, in the constant temperature cold end controller provided by Example 1 of the utility model, preferably, the insulation board 4 and the rear end face of the shell 1 form an insulation space, and the insulation space is the space between the insulation board 4 and the rear end face of the shell 1; in order to make the insulation space have a better insulation effect, a heat conducting plate 7 is arranged in the insulation space, and the heat from the rear of the constant temperature cold end controller penetrates the rear end face of the shell 1 and is received by the heat conducting plate 7, and the plate surface of the heat conducting plate 7 is facing the rear end face of the shell 1, and the heat conducting plate 7 is tilted in the direction of the rear end face of the shell 1. When the heat conducting plate 7 is placed in the insulation space, the area of ​​the heat conducting plate 7 is the largest, and the larger area can absorb more heat and has better heat dissipation conditions; the thermocouple 2 passes through the heat conducting plate 7; further, in order to improve the heat dissipation of the heat conducting plate 7 and make the insulation space have a better insulation effect, water pipes 8 for exchanging heat are distributed on the heat conducting plate 7, and a water tank 9 is arranged on the outside of the shell 1, and the water tank 9 is located in the insulation space , the water inlet of the water pipe 8 passes through the shell 1, the water inlet of the water pipe 8 is connected to the water outlet of the water tank 9, the water outlet of the water pipe 8 passes through the shell 1, the water outlet of the water pipe 8 is connected to the water inlet of the water tank 9, the cooling water in the water tank 9 flows in the water pipe 8, exchanges heat with the heat conducting plate 7, thereby reducing the temperature of the heat conducting plate 7, so that the heat conducting plate 7 can absorb more heat, and the cooling water after exchanging heat with the heat conducting plate 7 leaves the heat insulation space from the water outlet of the water pipe 8, exchanges heat with the external air, so that the cooling water returns to normal temperature, and then the next round of cooling is carried out; a water pump 91 is provided at the water outlet of the water tank 9, which can increase the cooling water circulation speed, thereby improving the cooling efficiency of the cooling water on the heat conducting plate 7, preventing the heat emitted by the heating equipment from affecting the temperature at the cold end of the thermocouple 2, thereby maintaining the temperature at the cold end of the thermocouple 2 stable, and achieving a stable temperature difference between the working end and the cold end of the thermocouple 2, so as to achieve accurate and stable control of the temperature of the pipeline.

[0032] like Figures 2 to 5 As shown, in the constant temperature cold end controller provided by Example 1 of the utility model, preferably, a filter 111 is arranged in front of the fan 11, and the filter 111 is detachably fixed to the shell 1; the filter 111 can filter the air inhaled into the shell 1 to prevent dust in the air from being adsorbed on the detection part of the first temperature sensor 5 or the second temperature sensor 6, avoid affecting the accuracy of the temperature data detected by the first temperature sensor 5 or the second temperature sensor 6, and realize the first temperature sensor 5 or the second temperature sensor 6 to accurately measure the temperature data, thereby accurately and stably controlling the temperature of the pipeline; the filter 111 is detachably fixed to the shell 1, and screw holes can be opened on the front end surface of the shell 1 and the filter 111, and the bolts are sleeved in the filter 111 and tightened with the screw holes on the front end surface of the shell 1. The filter 111 can be removed by removing the bolts to clean it, so as to keep the filter 111 clean.

[0033] In summary, the constant temperature cold end controller provided by the utility model can solve the problem that when the prior art is used near a heating device, the temperature of the cold end of the thermocouple is increased due to the heat emitted by the heating device, thereby continuing to control the heating device to heat up and exceeding the required pipe temperature to be maintained, thereby achieving accurate and stable temperature control.

[0034] Those skilled in the art should understand that those skilled in the art can implement the above-mentioned variations by combining the prior art and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present utility model, and will not be described in detail here.

[0035] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the utility model, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A constant temperature cold end controller, characterized in that: It comprises a shell, a thermocouple and a controller body; the shell is hollow inside; the controller body is arranged inside the shell; the controller body and the shell are relatively fixed; the cold end of the thermocouple is connected to the controller body; the working end of the thermocouple passes through the shell and extends to the outside of the shell; The side of the shell with the thermocouple is used as the rear side of the shell; a heat insulation board is arranged in the shell; the heat insulation board is located between the controller body and the rear end face of the shell; the heat insulation board separates the controller body and the rear end face of the shell; the thermocouple passes through the heat insulation board; a first temperature sensor is arranged on the board surface of the heat insulation board close to the controller body; the first temperature sensor is electrically connected to the controller body; A fan is arranged on the front surface of the shell; the fan faces the heat insulation board; the fan is electrically connected to the controller body; a vent is arranged on the top of the shell; the vent is located in front of the heat insulation board; a second temperature sensor is arranged inside the shell; the second temperature sensor is located in front of the heat insulation board; The detection part of the second temperature sensor is located on the axis of the fan; the detection part of the second temperature sensor is at the same height as the rotation center of the fan; and the second temperature sensor is electrically connected to the controller body.

2. The constant temperature cold end controller according to claim 1, characterized in that: The heat insulation plate and the rear end face of the shell form a heat insulation space; a heat conduction plate is arranged in the heat insulation space; the plate surface of the heat conduction plate faces the rear end face of the shell; the heat conduction plate is tilted toward the rear end face of the shell; the thermocouple passes through the heat conduction plate; water pipes for exchanging heat are distributed on the heat conduction plate; a water tank is arranged outside the shell; the water tank is located above the heat insulation space; the water inlet of the water pipe passes through the shell; the water inlet of the water pipe is connected to the water outlet of the water tank; the water outlet of the water pipe passes through the shell; the water outlet of the water pipe is connected to the water inlet of the water tank; a water pump is arranged at the water outlet of the water tank.

3. The constant temperature cold end controller according to claim 1, characterized in that: A filter is arranged in front of the fan; the filter is detachably fixed to the shell.

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