A constant temperature and humidity control system

Abstract

The present invention relates to the field of constant temperature and humidity control technology, and discloses a constant temperature and humidity control system, which includes an air supply device, a return air device and a temperature and humidity sensor. The inlet end of the return air device is connected to a constant temperature and humidity storage, and the outlet end of the air supply device is connected to the constant temperature and humidity room. The return air device discharges the gas in the constant temperature and humidity storage. The air supply device is used to heat and humidify part of the return air and the air of the external environment and then send them to the constant temperature and humidity storage. The temperature and humidity sensor is used to detect the temperature and humidity of the supply air delivered by the air supply device, and is also used to detect the temperature and humidity of the return air discharged by the return air device. The constant temperature and humidity control system disclosed by the present invention uses a first steam and a fluid mixture at the outlet of a hot fluid box to heat the gas in a generating chamber, which greatly improves the utilization rate of heat recovery. By adjusting the opening of a proportional valve, a first electric valve and a second electric valve, the constant temperature and humidity in the constant temperature and humidity storage can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of constant temperature and humidity control, and in particular to a constant temperature and humidity control system. Background Art

[0002] Usually, the heat recovery system of steam condensate only moves the condensate to a pool or mixes the water through a proportional three-way valve for use. These methods have low energy utilization rates, cannot achieve disturbance-free switching of heat sources, and cannot always supply heat energy to heat users, which brings a lot of inconvenience to life and production.

[0003] The existing technology has reduced the amount of steam used due to productivity reasons, which has led to a decrease in the amount of steam condensate recovered, resulting in insufficient hot water used in places where hot water is needed, causing abnormal temperatures in the controlled area and requiring manual switching, which is inconvenient to operate. Summary of the invention

[0004] Based on the above, the purpose of the present invention is to provide a constant temperature and humidity control system, which can not only improve the utilization rate of energy, but also can always supply heat energy to heat users and can switch automatically.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A constant temperature and humidity control system, comprising: an air supply device, the air supply device comprising a generating device, a hot fluid box, a first steam source condensate, a second steam source and a liquid pump, the air outlet of the generating device is connected to a constant temperature and humidity storage, the generating device comprises a shell, a heat exchange coil and a first nozzle, a generating chamber is defined in the shell, the first nozzle and the heat exchange coil are located in the generating chamber, a pressure switch and a proportional valve are provided on the connecting pipeline of the first steam source condensate, the pressure switch and the proportional valve are both electrically connected to a bus, the proportional valve is opened when the pressure switch detects a signal, the first steam of the first steam source condensate is mixed with the fluid at the outlet of the hot fluid box to form a hot fluid, the liquid pump pumps the hot fluid to the inlet of the heat exchange coil, a temperature measuring instrument electrically connected to the bus is provided on the connecting pipeline between the liquid pump and the heat exchange coil, the difference between the temperature of the hot fluid detected by the temperature measuring instrument and the preset hot fluid temperature is the hot fluid temperature difference, the outlet of the heat exchange coil is connected to the hot fluid box, the outlet end of the second steam source A first electric valve electrically connected to the bus is provided on a connecting pipeline connected to the hot fluid box, and the outlet end of the second steam source is also connected to the first nozzle, and a second electric valve electrically connected to the bus is provided on the connecting pipeline of the two; a return air device, whose inlet end is connected to the constant temperature and humidity storage, and the outlet end of the return air device is respectively connected to the external environment and the generating device, and the opening of the proportional valve and the opening of the first electric valve are both inversely correlated with the temperature difference of the hot fluid; a temperature and humidity sensor, which includes a first temperature and humidity sensor and a second temperature and humidity sensor, the first temperature and humidity sensor and the second temperature and humidity sensor are respectively electrically connected to the bus, the first temperature and humidity sensor is provided on the pipeline of the air supply device, and the second temperature and humidity sensor is provided on the pipeline of the return air device, the difference between the temperature of the return air detected by the second temperature and humidity sensor and the preset return air temperature is the first return air temperature difference, and the opening of the proportional valve and the opening of the first electric valve are both inversely correlated with the smaller one of the return air temperature difference and the hot fluid temperature difference.

[0007] As a preferred scheme of a constant temperature and humidity control system, the first temperature and humidity sensor detects the difference between the humidity of the supply air and the preset supply air humidity as the supply air humidity difference, the second temperature and humidity sensor detects the difference between the humidity of the return air and the preset return air humidity as the return air humidity difference, and the opening of the second electric valve is inversely correlated with the smaller one of the supply air humidity difference and the return air humidity difference.

[0008] As a preferred solution of a constant temperature and humidity control system, when the temperature of the return air is higher than the preset return air temperature, the speed at which the first electric valve closes is a first speed, and when the temperature of the return air is lower than the preset return air temperature, the speed at which the first electric valve opens is a second speed, and the second speed is greater than the first speed.

[0009] As a preferred solution of a constant temperature and humidity control system, a fluid switch is further provided on the connecting pipeline between the liquid pump and the heat exchange coil, and the fluid switch is electrically connected to the bus.

[0010] As a preferred solution of a constant temperature and humidity control system, the inlet end of the air supply device is provided with a first differential pressure switch electrically connected to the bus, and the outlet end is provided with a second differential pressure switch electrically connected to the bus.

[0011] As a preferred solution of a constant temperature and humidity control system, the temperature and humidity sensor also includes a third temperature and humidity sensor, and the third temperature and humidity sensor is arranged at the inlet of the air supply device to detect the temperature and humidity of the air.

[0012] As a preferred solution of a constant temperature and humidity control system, the constant temperature and humidity control system further includes a buffer tank, an overflow port is provided at the upper portion of the thermal fluid tank, and the overflow port is communicated with the buffer tank.

[0013] As a preferred solution of a constant temperature and humidity control system, the pipelines between the second steam source and the hot fluid box, and between the second steam source and the first nozzle are respectively connected to the buffer box.

[0014] As a preferred solution of a constant temperature and humidity control system, a filter and a second nozzle are provided in the thermal fluid box, the filter is located at the outlet of the thermal fluid box, and the second nozzle is connected to the outlet end of the first electric valve.

[0015] As a preferred solution of a constant temperature and humidity control system, an exhaust fan is provided on the connecting pipeline between the outlet end of the return air device and the external environment, and a frequency converter is provided on the exhaust fan, and the frequency converter is electrically connected to the bus.

[0016] The beneficial effects of the present invention are as follows: the constant temperature and humidity control system disclosed in the present invention adopts the mixture of condensed water from the first steam source and the fluid at the outlet of the hot fluid box to heat the gas in the generating chamber, which greatly improves the utilization rate of heat recovery. When the condensed water from the first steam source does not meet the production demand, the heat source is automatically switched through the pressure switch, and the fluid with a lower temperature in the hot fluid box is directly heated by the condensation heat release of the second steam from the second steam source. The opening of the proportional valve and the opening of the first electric valve are adjusted by the detected return air temperature and the temperature of the hot fluid, thereby adjusting the temperature of the hot fluid entering the heat exchange coil. The switching of the proportional valve and the first electric valve is a disturbance-free switching, and the temperature of the controlled constant temperature and humidity warehouse will not change abnormally due to the switching. In addition, the flow rate of the second steam entering the generating chamber can be adjusted by controlling the opening of the second electric valve, thereby affecting the humidity of the constant temperature and humidity warehouse, so that the humidity of the constant temperature and humidity warehouse is constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0018] Figure 1 is a schematic diagram of a constant temperature and humidity control system provided by a specific embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Enlarged view at A.

[0020] In the figure:

[0021] 11. First differential pressure switch; 12. Second differential pressure switch; 13. Shell; 14. Heat exchange coil; 15. First nozzle; 16. Air supply fan; 17. Draft fan;

[0022] 21. First steam source condensate valve; 22. Pressure switch; 23. Liquid pump; 24. Temperature measuring instrument; 25. Fluid switch; 26. Proportional valve; 27. Ball valve; 28. Stop valve; 29. ​​First Y-type filter; 210. First manual valve;

[0023] 31. First electric valve; 32. Second electric valve; 33. Second Y-type filter; 34. Second manual valve;

[0024] 41. hot fluid box; 42. buffer box; 43. filter element; 44. second nozzle; 45. hot fluid box drain valve; 46. buffer box drain valve;

[0025] 51. Constant temperature and humidity storage; 52. Display device; 53. Wind column;

[0026] 61. A first temperature and humidity sensor; 62. A second temperature and humidity sensor; 63. A third temperature and humidity sensor;

[0027] 70. Return air outlet; 71. Air valve; 72. Exhaust fan; 73. Frequency converter;

[0028] 81. Bus; 82. Human-computer interaction interface. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like 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 invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] In the description of the present invention, it should be noted that, 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 or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] This embodiment provides a constant temperature and humidity control system for providing a constant temperature and humidity environment for users. The fluid in this embodiment is water. Figure 1 and Figure 2As shown, it includes an air supply device, a return air device and a temperature and humidity sensor. The inlet end of the return air device is connected to the return air port 70 of the constant temperature and humidity storehouse 51. The constant temperature and humidity storehouse 51 is provided with four return air ports 70. The outlet end of the return air device is connected to the external environment and the air supply device respectively. The return air device is used to discharge the gas in the constant temperature and humidity storehouse 51 or send it to the air supply device for reheating. The air supply device is used to supplement the constant temperature and humidity storehouse 51 with a higher temperature and a higher humidity to maintain the constant temperature and humidity in the constant temperature and humidity storehouse. The temperature and humidity sensor is used to detect the temperature and humidity of the supply air delivered by the air supply device, and is also used to detect the temperature and humidity of the return air discharged by the return air device and the temperature and humidity of the air in the external environment entering the air supply device. The temperature and humidity sensor belongs to the prior art and can be obtained by purchasing. Specifically, the number of return air ports 70 in the constant temperature and humidity storehouse 51 is not limited to the four in the present embodiment, and can also be other numbers. The constant temperature and humidity storehouse 51 can be a room, a shopping mall, a warehouse, etc., which is selected according to actual needs.

[0033] Specifically, Figure 1 As shown, a first differential pressure switch 11 is provided at the inlet end of the air supply device, and a second differential pressure switch 12 is provided at the outlet end of the air supply device. The first differential pressure switch 11 and the second differential pressure switch 12 are electrically connected to the bus 81 respectively, wherein the first differential pressure switch 11 is used to detect the pressure difference at the inlet end of the air supply device, and the second differential pressure switch 12 is used to detect the pressure difference at the outlet end of the air supply device, so as to monitor the pressure difference condition in the air supply device in real time and avoid the occurrence of obstacles in the constant temperature and humidity control system due to abnormal pressure difference in the air supply device.

[0034] like Figure 1As shown, the air supply device of this embodiment includes a generating device, a hot fluid box 41, condensed water from a first steam source, a second steam source, a liquid pump 23 and a wind column 53. The air outlet of the generating device is connected to the wind column 53 in the constant temperature and humidity storage 51. The number of wind columns 53 in this embodiment is two, and the two wind columns 53 are respectively located on both sides of the constant temperature and humidity storage 51. The generating device of this embodiment includes a shell 13, a heat exchange coil 14 and a first nozzle 15. A generating chamber is defined in the shell 13. The first nozzle 15 and the heat exchange coil 14 are both located in the generating chamber. A first steam source condensate valve 21, a pressure switch 22 and a proportional valve 26 are provided on the connecting pipeline of the first steam source condensate. The first steam source condensate valve 21 is used to control whether the first steam enters. The proportional valve 26 and the pressure switch 22 are both electrically connected to the bus 81. When the pressure switch 22 detects a signal, the proportional valve 26 opens. The proportional valve 26 can adjust the opening according to the actual needs of the constant temperature and humidity control system to control the flow rate of the first steam entering the constant temperature and humidity control system in real time. The first steam of the first steam source condensate is mixed with the fluid at the outlet of the hot fluid box 41 to form a hot fluid. The liquid pump 23 pumps the hot fluid to the inlet of the heat exchange coil 14. Compared with the prior art, the lift of the liquid pump 23 of this embodiment is smaller, and the cost of the liquid pump 23 is greatly reduced. The prior art mostly uses plate-type heat exchangers, and the production cost of the heat exchange coil 14 of this embodiment is lower than that of the plate-type heat exchanger.

[0035] Furthermore, if Figure 1 As shown, a temperature measuring instrument 24 is provided on the connecting pipeline between the liquid pump 23 and the heat exchange coil 14, and the temperature measuring instrument 24 is electrically connected to the bus 81. The temperature measuring instrument 24 is used to detect the temperature of the hot fluid after the first steam of the condensed water of the first steam source is mixed with the fluid at the outlet of the hot fluid box 41. The difference between the temperature of the hot fluid detected by the temperature measuring instrument 24 and the preset hot fluid temperature is the hot fluid temperature difference. The opening of the proportional valve 26 and the opening of the first electric valve 31 are both inversely related to the hot fluid temperature difference. The outlet of the heat exchange coil 14 is connected to the hot fluid box 41, the outlet end of the second steam source is connected to the hot fluid box 41 and a first electric valve 31 is provided on the connecting pipeline between the two, and the first electric valve 31 is electrically connected to the bus 81. The outlet of the second steam source is also connected to the first nozzle 15, and a second electric valve 32 is provided on the connecting pipeline between the second steam source and the first nozzle 15, and the second electric valve 32 is electrically connected to the bus 81.

[0036] In order to reduce the dirt in the first steam, a first Y-type filter 29 is provided at the outlet of the first steam source condensate valve 21. In order to facilitate cleaning of the dirt in the first Y-type filter 29, a first manual valve 210 is provided at the inlet of the first Y-type filter 29. When cleaning the dirt in the first Y-type filter 29, the first manual valve 210 is manually closed to prevent leakage of the first steam. In order to reduce the dirt in the second steam, a second Y-type filter 33 is provided at the inlet of the first electric valve 31 and the second electric valve 32. In order to facilitate cleaning of the dirt in the second Y-type filter 33, a second manual valve 34 is provided at the inlet of the second Y-type filter 33. When cleaning the dirt in the second Y-type filter 33, the second manual valve 34 is manually closed to prevent leakage of the second steam.

[0037] like Figure 1 As shown, the temperature and humidity sensor of this embodiment includes a first temperature and humidity sensor 61 and a second temperature and humidity sensor 62, the first temperature and humidity sensor 61 and the second temperature and humidity sensor 62 are electrically connected to the bus 81 respectively, the first temperature and humidity sensor 61 is arranged on the pipeline of the air supply device, and is used to detect the temperature and humidity of the supply air, the second temperature and humidity sensor 62 is arranged on the pipeline of the return air device, and is used to detect the temperature and humidity of the return air, the difference between the temperature of the return air detected by the second temperature and humidity sensor 62 and the preset return air temperature is the first return air temperature difference, the opening of the proportional valve 26 and the opening of the first electric valve 31 are both inversely related to the smaller one of the return air temperature difference and the hot fluid temperature difference. This control method can make the temperature of the constant temperature and humidity storage 51 change continuously, thereby achieving the effect of disturbance-free switching.

[0038] Specifically, when the temperature of the return air is higher than the preset return air temperature, the temperature of the hot fluid is higher than the preset hot fluid temperature, indicating that the temperature in the constant temperature and humidity storage 51 is relatively high. The opening of the proportional valve 26 and the opening of the first electric valve 31 both need to be closed, and the smaller of the return air temperature difference and the hot fluid temperature difference is used as the adjustment standard to reduce the temperature of the hot fluid entering the heat exchange coil 14, and then reduce the temperature of the supply air delivered to the constant temperature and humidity storage 51, so that the temperature of the return air is gradually reduced until the temperature of the return air is consistent with the preset return air temperature, and the temperature of the hot fluid is consistent with the preset hot fluid temperature.

[0039] Correspondingly, when the temperature of the return air is lower than the preset return air temperature, the temperature of the hot fluid is lower than the preset hot fluid temperature, indicating that the temperature in the constant temperature and humidity storage 51 is relatively low at this time. The opening of the proportional valve 26 and the opening of the first electric valve 31 both need to be increased, and the smaller of the return air temperature difference and the hot fluid temperature difference is used as the adjustment standard to increase the temperature of the hot fluid entering the heat exchange coil 14, thereby increasing the temperature of the supply air delivered to the constant temperature and humidity storage 51, thereby gradually increasing the temperature of the return air until the temperature of the return air is consistent with the preset return air temperature, and the temperature of the hot fluid is consistent with the preset hot fluid temperature.

[0040] Furthermore, when the temperature of the return air is higher than the preset return air temperature, the closing speed of the opening of the first electric valve 31 is a first speed, and when the temperature of the return air is lower than the preset return air temperature, the opening speed of the first electric valve 31 is a second speed, and the second speed is greater than the first speed, that is, the opening speed of the first electric valve 31 is greater than its closing speed, so as to ensure that the temperature in the constant temperature and humidity chamber is maintained at the preset temperature, so that the temperature in the constant temperature and humidity storage 51 changes continuously.

[0041] In order to maintain the humidity in the constant temperature and humidity storage 51 at a preset humidity, the first temperature and humidity sensor 61 detects that the difference between the humidity of the supply air and the preset supply air humidity is the supply air humidity difference, the second temperature and humidity sensor 62 detects that the difference between the humidity of the return air and the preset return air humidity is the return air humidity difference, and the opening of the second electric valve 32 is inversely related to the smaller one of the supply air humidity difference and the return air humidity difference. This control method can make the humidity of the constant temperature and humidity storage 51 change continuously, thereby achieving the effect of non-disturbance switching.

[0042] Specifically, when the humidity of the supply air is higher than the preset supply air humidity, the humidity of the return air is higher than the preset return air humidity, indicating that the humidity in the constant temperature and humidity storage 51 is relatively high at this time, and the opening of the second electric valve 32 needs to be closed, and the smaller of the supply air humidity difference and the return air humidity difference is used as the adjustment standard to reduce the total amount of the second steam sprayed into the generating chamber, thereby reducing the humidity of the supply air delivered to the constant temperature and humidity storage 51, so that the humidity of the return air is gradually reduced until the humidity of the return air tends to be consistent with the preset supply air humidity, and the humidity of the supply air tends to be consistent with the preset supply air humidity.

[0043] Correspondingly, when the humidity of the supply air is lower than the preset supply air humidity, the humidity of the return air is lower than the preset return air humidity, indicating that the humidity in the constant temperature and humidity storage 51 is low at this time, and the opening of the second electric valve 32 needs to be opened wider, and the smaller of the supply air humidity difference and the return air humidity difference is used as the adjustment standard to increase the total amount of the second steam sprayed into the generating chamber, thereby increasing the humidity of the supply air delivered to the constant temperature and humidity storage 51, so that the humidity of the return air gradually increases until the humidity of the return air tends to be consistent with the preset supply air humidity, and the humidity of the supply air tends to be consistent with the preset supply air humidity.

[0044] Specifically, the above-mentioned control of the temperature and humidity of the constant temperature and humidity storage 51 in the present embodiment adopts PLC control, and adopts reverse logic control and low priority principle to adjust the temperature and humidity in the constant temperature and humidity storage 51 in real time, so as to prevent the temperature or humidity of the constant temperature and humidity storage 51 from changing drastically due to the large change of temperature in the system pipeline, so that the system can achieve the effect of disturbance-free switching.

[0045] The constant temperature and humidity control system provided in this embodiment uses the first steam and the fluid at the outlet of the hot fluid box 41 to heat the gas in the generating chamber, which greatly improves the utilization rate of heat recovery. When the condensed water of the first steam source does not meet the production demand, the heat source is automatically switched through the pressure switch 22, and the fluid with a lower temperature in the hot fluid box 41 is directly heated by the condensation heat release of the second steam of the second steam source. The opening of the proportional valve 26 and the opening of the first electric valve 31 are adjusted by the detected return air temperature and the temperature of the hot fluid, thereby adjusting the temperature of the hot fluid entering the heat exchange coil 14. The switching of the first electric valve 31 and the proportional valve 26 is a disturbance-free switching. The additional proportional valve 26 can be gradually opened or closed to reduce the influence of the condensed water of the first steam source on the temperature of the constant temperature and humidity storage 51, and the temperature of the controlled constant temperature and humidity storage 51 will not be abnormal due to the switching. In addition, by controlling the opening of the second electric valve 32, the flow rate of the second steam entering the generating chamber can be adjusted, thereby affecting the humidity of the constant temperature and humidity storage 51, so that the humidity of the constant temperature and humidity storage 51 is constant.

[0046] In order to better monitor the supply status of the first steam source condensate, such as Figure 1 As shown, a fluid switch 25 is also provided on the connecting pipeline between the liquid pump 23 and the heat exchange coil 14. The fluid switch 25 is electrically connected to the bus 81. When the condensed water of the first steam source is insufficient, the pressure switch 22 cannot detect a signal. If the pressure switch 22 cannot detect a signal within a preset time, it is considered that no first steam flows through the pipeline. At this time, the fluid switch 25 alarms to remind the operator that the condensed water of the first steam source of the constant temperature and humidity control system is insufficient, so that the operator can promptly know the situation of insufficient supply of condensed water from the first steam source.

[0047] like Figure 1As shown, the generating device of this embodiment further includes an induced draft fan 17 and a blower 16. Since part of the gas in the constant temperature and humidity chamber is discharged to the external environment, in order to ensure that the total content of the gas in the constant temperature and humidity chamber remains unchanged, it is necessary to introduce part of the air from the external environment to the generating device, and the induced draft fan 17 can send the air from the external environment to the generating chamber, and the blower 16 is configured to send the gas in the generating chamber to the constant temperature and humidity storage 51. In order to facilitate real-time monitoring of the temperature and humidity of the external environment air when it enters the generating chamber, the temperature and humidity sensor of this embodiment further includes a third temperature and humidity sensor 63, which is arranged at the inlet of the induced draft fan 17 to detect the temperature and humidity of the air.

[0048] like Figure 1 As shown, a ball valve 27 is provided between the first steam source condensate valve 21 and the pressure switch 22. The ball valve 27 is used to connect to other heat users to provide heat to other heat users. A stop valve 28 is provided at the inlet and outlet ends of the liquid pump 23 to discharge the fluid in the pipeline during pipeline maintenance.

[0049] like Figure 1 As shown, the constant temperature and humidity control system of this embodiment also includes a buffer tank 42. An overflow port is provided at the top of the hot fluid tank 41. The overflow port is connected to the buffer tank 42 to discharge the excess fluid in the hot fluid tank 41 to prevent the occurrence of overflow due to excessive fluid in the hot fluid tank 41. Since the fluid in the buffer tank 42 has a certain temperature, the buffer tank 42 can provide heat for other users who do not have high requirements for fluid temperature to make full use of heat and reduce heat waste. The pipeline between the second steam source and the hot fluid tank 41 and the pipeline between the second steam source and the first nozzle 15 are respectively connected to the buffer tank 42 to discharge the water formed by the condensation of the second steam in the pipeline to ensure that all the steam entering the generating chamber is the second steam.

[0050] In order to facilitate the discharge of dirt in the buffer tank 42, as shown in FIG. Figure 1 As shown, the bottom of the buffer box 42 is provided with a buffer box 42 drain port, and the buffer box 42 drain port is provided with a buffer box drain valve 46 to discharge the dirt in the buffer box 42. In order to facilitate the discharge of dirt in the hot fluid box 41, as shown in FIG. Figure 1 As shown, a drain port of the hot fluid box 41 is provided at the bottom of the hot fluid box 41 , and a drain valve 45 is provided at the drain port of the hot fluid box 41 to discharge dirt in the hot fluid box 41 .

[0051] like Figure 1As shown, in order to ensure the discharge of the fluid in the hot fluid box 41, the outlet of the hot fluid box 41 is located at the lower part of the hot fluid box 41. However, since dirt will be deposited at the bottom of the hot fluid box 41, a filter 43 needs to be added at the outlet. The filter 43 is located at the outlet of the hot fluid box 41 to filter the fluid entering the liquid pump 23 to prevent the liquid pump 23 from being blocked due to the dirt at the bottom of the hot fluid box 41 entering the liquid pump 23 with the fluid. In order to make the second steam entering the hot fluid box 41 fully mixed with the fluid in the hot fluid box 41, a second nozzle 44 is provided in the hot fluid box 41 of this embodiment. The second nozzle 44 is connected to the outlet end of the first electric valve 31. The additional second nozzle 44 can make the second steam entering the hot fluid box 41 quickly and fully mix with the fluid with a lower temperature in the hot fluid box 41, so that the temperature of the hot fluid changes faster.

[0052] like Figure 1 As shown, an air valve 71 and an exhaust fan 72 are provided on the connection pipeline between the outlet end of the return air device of this embodiment and the external environment. The air valve 71 is used to adjust the flow rate of air in the pipeline. A metal insect-proof net is provided in the exhaust fan 72. A frequency converter 73 is provided on the exhaust fan 72. The frequency converter 73 is electrically connected to the bus 81. The frequency converter 73 can adjust the rotation speed of the exhaust fan 72 in real time, thereby changing the amount of air discharged by the exhaust fan 72 per unit time.

[0053] like Figure 1 As shown, a display device 52 is provided in the constant temperature and humidity storage 51 of this embodiment, and the display device 52 is electrically connected to the bus 81. The additional display device 52 facilitates the operator to observe the temperature and humidity of the supply air, the temperature and humidity of the return air and other data in real time.

[0054] like Figure 1 As shown, the constant temperature and humidity control system of this embodiment also includes a human-machine interaction interface 82 electrically connected to the bus 81, so that the operator can understand the working status of each component in real time. The human-machine interaction interface 82 of this embodiment is a touch-screen human-machine interaction interface, which belongs to the existing technology and can be obtained through external purchase.

[0055] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A constant temperature and humidity control system, characterized in that: include: An air supply device, the air supply device comprising a generating device, a hot fluid box (41), a first steam source condensate, a second steam source and a liquid pump (23), the air outlet of the generating device being connected to a constant temperature and humidity storage (51), the generating device comprising a shell (13), a heat exchange coil (14) and a first nozzle (15), a generating chamber being defined in the shell (13), the first nozzle (15) and the heat exchange coil (14) being located in the generating chamber, a pressure switch (22) and a proportional valve (26) being provided on a connecting pipeline of the first steam source condensate, the pressure switch (22) and the proportional valve (26) being both electrically connected to a bus (81), the proportional valve (26) being opened when the pressure switch (22) detects a signal, the first steam source condensate is mixed with the fluid at the outlet of the hot fluid box (41) to form a hot fluid, the liquid pump (23) pumps the hot fluid into the hot fluid, and the hot fluid is pumped into the hot fluid. To the inlet of the heat exchange coil (14), a temperature measuring instrument (24) electrically connected to the bus (81) is provided on the connecting pipeline between the liquid pump (23) and the heat exchange coil (14), the difference between the temperature of the hot fluid detected by the temperature measuring instrument (24) and the preset hot fluid temperature is the hot fluid temperature difference, the outlet of the heat exchange coil (14) is connected to the hot fluid box (41), the outlet end of the second steam source is connected to the hot fluid box (41), and a first electric valve (31) electrically connected to the bus (81) is provided on the connecting pipeline of the two, the outlet end of the second steam source is also connected to the first nozzle (15), and a second electric valve (32) electrically connected to the bus (81) is provided on the connecting pipeline of the two, and the opening degree of the proportional valve (26) and the opening degree of the first electric valve (31) are both inversely related to the hot fluid temperature difference; An air return device, the inlet end of which is in communication with the constant temperature and humidity storehouse (51), and the outlet end of which is in communication with the external environment and the generating device respectively; A temperature and humidity sensor, comprising a first temperature and humidity sensor (61) and a second temperature and humidity sensor (62), wherein the first temperature and humidity sensor (61) and the second temperature and humidity sensor (62) are electrically connected to the bus (81) respectively, wherein the first temperature and humidity sensor (61) is arranged on a pipeline of the air supply device, and the second temperature and humidity sensor (62) is arranged on a pipeline of the return air device, wherein the difference between the return air temperature detected by the second temperature and humidity sensor (62) and a preset return air temperature is a first return air temperature difference, and the opening of the proportional valve (26) and the opening of the first electric valve (31) are both inversely correlated with the smaller one of the return air temperature difference and the thermal fluid temperature difference.

2. The constant temperature and humidity control system according to claim 1, characterized in that: The first temperature and humidity sensor (61) detects that the difference between the humidity of the supply air and the preset supply air humidity is the supply air humidity difference, and the second temperature and humidity sensor (62) detects that the difference between the humidity of the return air and the preset return air humidity is the return air humidity difference. The opening of the second electric valve (32) is inversely correlated with the smaller one of the supply air humidity difference and the return air humidity difference.

3. The constant temperature and humidity control system according to claim 1, characterized in that: When the temperature of the return air is higher than the preset return air temperature, the speed at which the opening of the first electric valve (31) is closed is a first speed, and when the temperature of the return air is lower than the preset return air temperature, the speed at which the opening of the first electric valve (31) is opened is a second speed, and the second speed is greater than the first speed.

4. The constant temperature and humidity control system according to claim 1, characterized in that: A fluid switch (25) is also provided on the connecting pipeline between the liquid pump (23) and the heat exchange coil (14), and the fluid switch (25) is electrically connected to the bus (81).

5. The constant temperature and humidity control system according to claim 1, characterized in that: The inlet end of the air supply device is provided with a first differential pressure switch (11) electrically connected to the bus (81), and the outlet end is provided with a second differential pressure switch (12) electrically connected to the bus (81).

6. The constant temperature and humidity control system according to claim 1, characterized in that: The temperature and humidity sensor also includes a third temperature and humidity sensor (63), which is arranged at the inlet of the air supply device to detect the temperature and humidity of the air.

7. The constant temperature and humidity control system according to claim 1, characterized in that: The constant temperature and humidity control system further comprises a buffer tank (42), and an overflow port is provided at the upper portion of the thermal fluid tank (41), and the overflow port is in communication with the buffer tank (42).

8. The constant temperature and humidity control system according to claim 7, characterized in that: The pipelines between the second steam source and the hot fluid box (41) and between the second steam source and the first nozzle (15) are respectively connected to the buffer box (42).

9. The constant temperature and humidity control system according to claim 1, characterized in that: The hot fluid box (41) is provided with a filter (43) and a second nozzle (44), the filter (43) is located at the outlet of the hot fluid box (41), and the second nozzle (44) is connected to the outlet end of the first electric valve (31).

10. The constant temperature and humidity control system according to claim 1, characterized in that: An exhaust fan (72) is provided on a connection pipeline between the outlet end of the return air device and the external environment. A frequency converter (73) is provided on the exhaust fan (72). The frequency converter (73) is electrically connected to the bus (81).

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