DE102006002938B3 - Thermostat device for fluid heat carrier has at least one constant-temperature unit with through-flow cooler and branch line - Google Patents

Abstract

A thermostat device (100) includes a heating device (2), a pump (3), and at least one constant-temperature unit (50) with a through-flow cooler (10) and a branch line (11). The constant-temperature unit may have a temperature sensor (12) fitted to it. It may be possible to connect several constant-temperature units to the same thermostat device.

Description

The The invention relates to a thermostat device for controlling the temperature of a fluid Heat transfer medium with a warm-up device and a pump.

such Thermostat facilities are used, for example, in chemical laboratories used to desired in any desired chemical reactors Way to temper, wherein of the thermostatic devices a fluid heat transfer medium, especially an oil with a big one Heat capacity, for the uniform maintenance of a Temperature to the desired Temperature heated and subsequently by means of a circulation pump passed through a reactor becomes. As a result, prevails in the reactor or in any other Recipients a constant temperature, for example, a chemical Run reaction under predetermined conditions.

in principle are such thermostatic devices in all other areas the technology can be used, where it is necessary, a fluid heat transfer medium to a desired Heat up temperature and, among other things, with this heat transfer medium other facilities in desired Way to temper. As heat transfer medium can arbitrary liquids be used.

To the Setting a desired Temperature, it is known, the thermostat device a temperature measuring unit in shape assigned to a sensor, which is the temperature of the pumped by the pump Heat transfer medium detected. Thus, with a correspondingly designed control device the heating power of a warming device which can be configured as desired be adjusted to the heat transfer medium to temper in a predetermined manner.

This However, it is disadvantageous, as only a relatively sluggish control loop present, as by the usual size Heat capacity of the heat transfer medium a turn on or off the warm-up device only with relatively large time delay in a change the temperature of the thermostat device to a recipient funded Heat transfer medium results.

The DE 86 03 494 U1 discloses a thermostat device with a recipient, which is connected via a feed line and a return line to a heat exchanger vessel for a heat transfer medium. The heat exchanger vessel is associated with a warm-up device, a cooling device, a circulation pump and a temperature control device.

In the following describes the DE 694 24 270 T2 a temperature control means for setting the temperature of a workstation and a working medium at the workstation to a predetermined temperature. The workstation includes temperature sensing means, a source of liquid coolant, a flow cooler, and a coolant recirculation pump connected to a flow flow conduit that directs the coolant from the source through the workstation.

In the flow flow line is a coolant heater intended.

outgoing From this state of the art, the skilled person is faced with the task, a thermostat device of the type mentioned above, with the one by the user desired Temperature of the heat transfer medium adjustable without too much time delay is.

According to the invention Problem solved by the features of claim 1.

Of the Core idea of the invention is one of the thermostat device tempered heat transfer medium, preferably a liquid, such as an oil, that for such purpose is known per se, not directly to a recipient zuzuleiten, but first by a tempering lead. The Temperature control unit includes a branch to the flow of heat transfer medium divide. In this case, the part of the split flow of the heat transfer medium essentially unchanged by a piping system forwarded and the other part passes through a Flow cooler, to reduce the temperature of this partial flow in a controlled manner to be able to. The flow cooler can be dependent on the expert of the chosen Temperature range and the heat transfer medium be designed in any way to one as possible effective cooling the heat transfer medium to reach. After the one partial flow through the flow cooler This partial flow will turn to the first partial flow, the Shelf has remained, merged, so that subsequently obtained a thorough mixing of these two streams In turn, the absolute temperature of the meanwhile mixed up Heat transfer medium to reduce. Subsequently This is cooled to a predetermined temperature heat transfer medium the actual recipient, for example a chemical reactor or the like, to temper it as desired.

Of course, the heat transfer medium, after passing through the recipient has, in a conventional manner again the thermostat device or its warm-up device is supplied to here again to be heated to a set starting temperature.

Of the Advantage of the device is that with the temperature control unit a temperature of the heat transfer medium, which flows through a recipient, much more exak ter and can be set faster, here only smaller amounts of heat transfer medium flow through the temperature control unit, which gives the energy to change the temperature of this stream is much lower and this temperature changed much faster can be. Consequently, an adaptation to different requirements much easier possible and the thermostat device itself can be kept at a constant rate Temperature are operated.

For the purpose of increase the efficiency of the thermostat device are several essentially identical tempering units connected to the thermostat device. Each temperature control unit is doing this from the thermostat device with the help of the pump that in essence fed to the same temperature heated heat transfer medium and in each case to the desired temperature in the various temperature control units cooled, to different recipients, each with different requirements to be able to serve. Of course is in this case, the heat transfer medium via appropriate Each pipe in turn fed to the thermostat device.

Around the heat transfer medium in the tempering in a simple way tempering includes this a control device for controlling a proportional valve, that of the expert in dependence the temperature range and the selected heat transfer medium can be selected can. With the proportional valve is the size of each of the two partial flows, the either stay uncooled or the flow cooler go through, set to subsequently by mixing the two now differently tempered streams one Total flow of the heat transfer medium to obtain at a predetermined temperature.

to exact setting of a desired temperature If a temperature measuring unit is provided on the tempering unit, For example, a known heat sensor, the temperature of the heat transfer medium to monitor after this has passed through the temperature control unit. With a corresponding designed control unit can thus in the manner of a control loop, the temperature of the heat transfer medium in the desired Be set by the amount of the heat transfer medium flowing through.

To the Connection of various components, pipelines and the like they are each interconnected via screw connections of the pipelines connected with each other. These sealless flange connections also guarantee at big Temperature fluctuations the tightness of the system to escape the heat transfer medium to avoid.

The Pump for promotion the heat transfer medium consists of a vane pump, the one about Magnetic coupling is driven by an electric motor. in this connection can Pressure capacities up to 2500 hPa can be generated in a simple manner, around the heat transfer medium with sufficient pressures to promote can.

For the compensation of temperature fluctuations, the thermostat device is associated with a reservoir, in the excess heat transfer medium can be cached without pressure, and this reservoir also as an expansion vessel to compensate the volume of the expanding or contracting heat transfer medium serves. Preferably, this reservoir is equipped with a cooling, mainly to the surface to cool the heat transfer medium, so that it can not evaporate or even burn. THEREFORE is in particular the operating safety for users of the thermostat device guaranteed.

The Device is described below with reference to an embodiment with reference on the associated Drawing closer explained. The only Fig. The drawing shows an illustration of a thermostat device according to the invention.

With the thermostat device 100 For example, fluid heat transfer media, such as, inter alia, an oil or another liquid, can be heated in the desired manner to any desired recipient 15 , such as chemical reactors or the like, to temper. The thermostat device 100 includes a warm-up device 2 , Especially in the form of a water heater, with which the heat transfer medium is heated. The warm-up device 2 has in a conventional manner via heating rods and a sensor for monitoring the temperature of the heat transfer medium, with which also the warm-up device 2 can be switched off when no longer present heat transfer medium. One in the upper part of the warm-up device 2 arranged return line is arranged tangentially to the heat transfer medium rotating in the warm-up device 2 to initiate in such a way to vent the heat transfer medium automatically by the occurring centrifugal force.

Furthermore, the thermostat device has 100 over a storage container 1 , which simultaneously serves as an expansion vessel and a relative to the viscosity of the heat transfer medium relatively small bore with the warm-up device 2 communicates. In the reservoir 1 Furthermore, cooling is integrated, in particular to cool the surface of the heat transfer medium, so as to avoid evaporation or even burning, whereby the reliability of the thermostat device 100 is substantially increased.

The heat transfer medium is, as by the arrows 16 indicated by means of a pump 3 , in particular a vane pump, conveyed through the piping system, wherein the pump 3 via a magnetic coupling 4 from a drive motor 5 , in particular an electric motor, is driven. Furthermore, the thermostat device has 100 via a temperature sensor 6 , which is the temperature of the warm-up device 2 subsidized heat transfer medium detected.

To set different temperatures is the thermostat device 100 at least one tempering unit 50 associated with piping, especially metal, each with fittings 7 sealed to the thermostat device 100 connected. In this case, each tempering unit comprises 50 a control device 9 , with a proportional valve 8th is controlled. By means of this proportional valve 8th the current of the heat transfer medium is divided into two partial streams, one of which in each case on the right in the temperature control unit 50 drawn partial flow is conveyed substantially uncooled and the other each left in the temperature control unit 50 drawn partial flow a flow cooler 10 passes. The flow cooler 10 can be designed by the skilled person in any way to effectively cool the heat transfer medium. Subsequently, these two partial streams are at a branch 11 in turn combined, the temperature of the now again merged fluid flow with a known temperature sensor 12 is monitored.

Depending on the position of the proportional valve 8th the one sub-stream is supplied more fluid than the other, so that, for example, a larger amount of the heat transfer medium in the flow cooler 10 is cooled or not. Thus, the temperature of the fluid stream after branching may be 11 be set in the desired manner, this fluid stream below a recipient 15 For example, a chemical reactor or the like passes through. Subsequently, the heat transfer medium is conveyed back in a conventional manner and the thermostat device 100 fed.

The thermostat device 100 is constructed such that several identical tempering units 50 can be connected modularly, wherein the respective pipe end of the temperature control units 50 for example with caps 14 can be screwed or sealed.

Claims (2)

Thermostatic device for controlling the temperature of a fluid heat transfer medium with a warm-up device ( 2 ) and a pump ( 3 ), wherein - the thermostat device ( 100 ) several tempering units ( 50 ) each with a flow cooler ( 10 ) and a branch ( 11 ) and a temperature sensor ( 12 ), - each temperature control unit ( 50 ) with a recipient ( 15 ) and a control device ( 9 ) for controlling a proportional valve ( 8th ), - the heat transfer medium via the pump designed as a vane pump ( 3 ), which via a magnetic coupling ( 4 ) from a drive motor ( 5 ), is conveyable and - the warm-up device ( 2 ) a storage container ( 1 ), in particular with integrated cooling. Thermostat device according to claim 1, wherein various components via screw connections ( 7 ) are connectable to each other.