EP3088823B1 - Device for tempering a tempering fluid - Google Patents

Description

The present invention relates to a device for tempering a tempering, in particular a thermal oil, with a particular helical heater, a cooling device, which is formed in particular by the evaporator of a refrigeration cycle, and a closed fluid guide for guiding the tempering in the device and between the device and a consumer.

Such devices, which are also referred to as thermostats, serve, for example, to heat a consumer, for example a reactor in a chemical operation, to a certain temperature, to hold it for a predetermined time at this temperature and to cool it again after this time. It is not only important to comply with the specified temperatures exactly, but also to achieve these quickly and to cool down again quickly. The best known devices can cover a temperature range of -120 ° C to + 400 ° C. In these devices, the circulating in the fluid guide temperature control fluid is heated with the heater or cooled with the cooling device and fed to a connected to the fluid guide consumers and then returned from this to the device.

The schematic in Fig. 6 shown known temperature control device 1 has a helical heater 3 and a first evaporator 5 of a refrigeration cycle 7. In the refrigeration cycle 7 in which refrigerant circulates, there are further arranged a compressor 9, a condenser 10, a second evaporator 11 and an expansion valve 12. The heating device 3 is located in a horizontal cylinder 13, at one end of a circulating device in the form of a Impeller 15 is arranged. A arranged in a sleeve, not shown, shaft 17 of the impeller 15 is guided through an end face of the cylinder 13 and is driven by a drive 19 arranged outside the cylinder. A fluid guide 21 for guiding the Temperierfluids passes through the cylinder 13 and through the formed as a heat exchanger between the fluid guide 21 and the refrigerant circuit 7 first evaporator 5 and between the device 1 and a consumer, not shown, supplied via a feed line 23 tempering and of the can be recycled to the temperature control device 1 via a return line 25 Temperierfluid.

The temperature control fluid guided through the fluid guide 21 by means of the impeller 15 therefore flows through the evaporator 5, where it is cooled when the evaporator 5 is operated, and the heating device 3, where it is heated when the heating device 3 is operated.

Since, as mentioned above, the tempering fluid can be heated up to + 400 ° C by the heater 3, the sleeve and the shaft 17 have a certain length outside of the cylinder 13. In addition, they are as thin as possible in order to conduct as little heat in the direction of the drive 19. Finally, located between the sleeve and the shaft 17 is a seal (not shown). Between the seal and the cylinder 13 is a heat transfer plate in the form of a bulkhead 27, which consists of good heat conducting material, such as aluminum. In particular, the bulkhead 27 is arranged at a smooth rotated position of the sleeve, so that a good heat transfer between the sleeve and the bulkhead 27 results. Thus, the temperature at the seal is kept so low, even if the temperature of the tempering fluid in the cylinder 13 can reach a temperature of 400 ° C that no high-temperature seal is required for the seal of the shaft.

As mentioned above, the first evaporator 5 is formed as a heat exchanger. By evaporating cold refrigerant from the compressor 9, a cooling of the first evaporator 5 flowing around tempering takes place. The second evaporator 11 is a so-called suction gas cooler. Through this flows out of the compressor 9 exiting cold refrigerant. Warm refrigerant returned from the first evaporator 5 to the compressor 9 flows around the second evaporator 11 and is thereby cooled. The second evaporator 11 therefore acts as a heat exchanger between the cold refrigerant and the hot refrigerant, so that the compressor 9 is already supplied pre-cooled refrigerant.

In the temperature control device 1 described above, all elements, in particular the heating device 3 and the cooling device 5 for the tempering fluid, but also the drive 13 for the circulating pump 15, the compressor 9 and the suction gas cooler 11 are arranged side by side. As a result, the known temperature control device 1 requires a relatively large amount of space.

The US 2005/0269067 A1 discloses a device according to the preamble of claim 1. A similar device is in GB 749244 A disclosed.

It is an object of the invention to provide a device for controlling the temperature of a tempering of the type mentioned, in which undesirable water contained in the tempering fluid can be removed.

This object is achieved by a device having the features of claim 1.

The fluid guide has an expansion vessel for the tempering fluid, which is preferably arranged on the device such that the bottom of the expansion vessel in the position of use of the device at approximately the same height located as the venting device for the fluid guide sealing another intermediate floor. As a result, the space above the false floor is exploited. The expansion vessel, which forms a compensation chamber for expanding temperature control fluid, which is necessary in particular in a closed system, is connected in shunt to the fluid guide.

Below the bottom of the expansion vessel, preferably in the middle, a condensate collecting pot is provided. Since, as mentioned above, the expansion vessel is connected in shunt to the fluid guide, and the expansion vessel is not tempered, no moisture absorption takes place per se. Nevertheless, for example, water may be present in the tempering fluid due to introduction and evaporate out in the fluid line, in particular if the fluid is heated above 100 ° C. The water content reaches the expansion vessel, which is at about room temperature, where the water condenses. The condensed water segregates with the tempering fluid present in the vessel and sinks to the bottom, which is preferably bevelled towards the collecting vessel. As a result, the water enters the collection pot, from where it can be removed. For discharging water from the collecting pot, a removal device is arranged on the collecting pot.

During the heating of the tempering fluid and the associated expansion, the expansion vessel is filled with tempering fluid. This results in a boost for the water in the collecting pot, which can be viewed in a sight glass, in particular on an illuminated bottom of the sight glass. Thus, the user of the device can easily detect whether water has accumulated in the system and possibly discharge it via the removal device arranged on the collecting pot.

The heating device and the cooling device are preferably arranged in a common, in particular cylindrical container, which is formed as part of the fluid guide. As a result, the heating device and the cooling device can be arranged nested in one another in a particularly compact manner.

According to a preferred embodiment of the invention, a circulation device is arranged in the guide. The circulating device is preferably an impeller, which is arranged rotatably in the fluid guide, so that the temperature control fluid can be circulated in the fluid guide by a rotational movement of the impeller.

According to a further embodiment of the invention, which is also claimed for itself, the circulation device is designed so that it sets the tempering fluid in the container in rotation, and means are provided, through which the rotating tempering in the winding direction between the turns of the arranged in the container Heating and / or cooling device is performed. The rotational movement of the tempering fluid caused by the circulation device is therefore utilized to guide the tempering fluid between the turns of the heating and / or cooling device, so that the turns are particularly well, in particular laminar, flowing around the rotating fluid, whereby the tempering fluid is particularly effective is heated or cooled.

Preferably, the circulation device is likewise arranged in the common container for the heating device and the cooling device. This saves additional space.

According to a preferred development of the invention, the tempering fluid flows in the vertical direction in the region of the heating device and the cooling device. This allows gravity to be used for the circulation. In addition, a venting of the fluid guide is facilitated.

According to a further preferred embodiment of the invention, the container may be formed as a cylinder with vertical cylinder axis in use. This results in good flow conditions, in particular in conjunction with a pump with a vertical axis of rotation.

The container may have a container insert, in particular a tube. In particular, the container insert is arranged between the heating device and the cooling device and thus creates for each of these a separate space permeable by the tempering fluid. Heating and cooling device can thereby be flowed through separately, in particular one after the other.

As mentioned above, it is particularly advantageous for the tempering device according to the invention that the heating and cooling device can be flowed around in succession by the tempering fluid. As a result, the tempering fluid can be heated and cooled simultaneously, whereby a sluggish control behavior of the heating and / or the cooling device compensated and the tempering within a narrow tolerance range, for example, 0.1 Kelvin, can be controlled to a desired temperature.

According to a further preferred embodiment of the invention, the container insert comprises a second, inner tube, which is arranged within the first outer tube, so that between the inner tube and the outer tube, an inner annular space and between the outer tube and the container, an outer annular space is trained. The heater may be disposed in the inner annulus and the cooling device may be disposed in the outer annulus. Alternatively, the cooling device can be arranged in the inner annular space and the heating device in the outer annular space. In both cases, the formation of the two annular spaces causes the heating and the cooling device of the tempering fluid are thoroughly washed and this cool or heat particularly effective.

The outer tube may be formed as an overflow tube and the tempering fluid can be supplied via a flow to one of the two annular spaces and reach by overflow into the other annulus. In a simple way, such a flow through both annular spaces can be realized one after the other.

According to a further preferred embodiment of the invention, the inner tube rests on the bottom of the container and has the outer tube to the container bottom at a distance. Furthermore, the inner annular space is closed by a plate down and the outer annular space at the lower end has a connection to the return line of the fluid line. Again, a clever fluid management is realized in a simple manner. The returning via the return from a consumer connected to the device fluid passes so first at the lower end in the outer annulus, which preferably flows through it in the operating position of the device to then flow in the upper region of the outer annulus in the inner annulus and there decrease.

According to a further preferred embodiment of the invention, an intermediate bottom is inserted at the lower end in the inner tube, which has a particular centrally arranged passage opening. Further, in the space between the intermediate bottom and the container bottom, an impeller is used and this space is connected via an opening in the inner tube with the outer annular space. This causes an advantageous integration of the impeller in the fluid guide.

Preferably, the opening is formed by a in the direction of rotation of the pump impeller spirally outwardly bent portion of the inner tube between the intermediate bottom and the container bottom. The impeller promotes the in the tempering fluid having entered the space to the outside, wherein the inner tube bent in this section serves as a guide, so that the tempering fluid enters the outer annular space through the opening in the inner tube at a particularly high speed.

In addition, an ascending ramp may be provided which extends from the opening of the inner tube into the outer annulus and preferably between the turns of the heating or cooling means in the outer annulus. Due to the rising ramp, the fluid is directed obliquely upwards and directly between the turns. Due to the ramp, the speed of the tempering fluid receives a vertical component, which is advantageous for a helical flow through the outer annular space.

According to a further preferred embodiment of the invention, the inner annular space is connected via a preferably oval opening in the wall of the inner tube with a flow line of the fluid guide.

Preferably, the flow line is guided away tangentially in the direction of rotation of the impeller from the inner tube, so that the tempering fluid can flow into the supply line according to its rotation direction of the impeller corresponding rotation direction. As a result, the tempering fluid can be removed from the container particularly well.

According to a further preferred embodiment of the invention, the return line of the fluid guide is guided in the interior of the inner tube. In this case, the return line can in particular open into a collector for returning tempering fluid, which is preferably arranged in the center of the container. Advantageously, the existing space within the inner tube can be exploited.

According to a further preferred embodiment of the invention, the collector on a venting device for venting the fluid guide. This allows gas to be removed from the fluid guide.

Preferably, the collector is designed as a transfer pot. Since it is a closed device, in which the fluid guide is closed to the environment, the inner tube is preferably sealed by a distance to the upper edge of the overflow pot further intermediate bottom. Preferably, this further false bottom is in use of the device approximately at half the height of the container. An expansion vessel can then be arranged relatively deep, so that the overall height of the device remains low.

Preferably, the return line and the flow line of the tempering be performed on the same side in the container. Further, the drive for the circulating means may be arranged on the side of the container, which faces away from the side on which the return line and the supply line are guided into the container. This allows a relatively simple piping and good access to all parts of the device.

According to a further preferred embodiment of the invention, the impeller is coupled via a long shaft with a drive arranged outside the container. The shaft is guided inside a sleeve. The end of the shaft facing the container is surrounded by tempering fluid, in particular within the sleeve. To seal the sleeve-shaft assembly, a seal between the shaft and the sleeve is arranged. Preferably, a heat transfer plate is also provided between the container and the drive, in particular between the container and the seal. This is preferably formed of a good heat conducting material, such as aluminum, and is in contact with a smooth rotated portion of the sleeve, so that heat from the sleeve well on the plate is transmitted. The heat carrier plate preferably has cooling fins, so that the heat is released from the plate well to the environment. Together with the long shaft, a strong temperature reduction up to the seal in the area of the drive can be achieved. As a result, advantageously no high-temperature seal for the seal between the shaft and the sleeve must be used. Preferably, the shaft and / or the sleeve made of a poor thermal conductivity material such as stainless steel.

According to a development of the invention, the refrigeration cycle to a second evaporator as a so-called suction gas cooler, which is connected to cool the refrigerant as a heat exchanger in front of the compressor. The suction cup cooler cools the refrigerant, preventing overheating of the compressor, which is particularly important in sealed systems.

According to a further embodiment of the invention, which is also claimed for itself, the suction gas cooler is arranged between the container and the drive. In the apparatus according to the invention, therefore, the existing due to the long shaft anyway between the container and the drive space is cleverly used by accommodating the Sauggaskühlers, so that there is a further space savings.

According to a further preferred embodiment of the invention, a sight glass is provided for level indication of the tempering, which is connected by means of a communicating tube with the expansion vessel. As a result, the level of the display corresponds to the level of the expansion vessel. The sight glass can also be designed as a filling device for the fluid circuit and for this purpose in particular have a large filling opening.

Fig. 1

eine seitliche Ansicht in teilweiser Schnittdarstellung einer erfindungsgemäßen Temperiervorrichtung,

Fig. 2

eine perspektivische Ansicht in teilweiser Schnittdarstellung eines Ausschnitts der Vorrichtung von Fig. 1,

Fig. 3

eine weitere, vereinfachte perspektivische Ansicht des Ausschnitts von Fig. 2,

Fig. 4

eine seitliche Ansicht eines Expansionsgefäßes der Vorrichtung von Fig. 1,

Fig. 5

eine perspektivische Ansicht des Expansionsgefäßes von Fig. 4 und

Fig. 6

eine aus dem Stand der Technik bekannte Temperiervorrichtung.

The invention will now be described by way of example with reference to an advantageous embodiment with reference to the accompanying drawings. They show, in a schematic representation in each case:

Fig. 1

a side view in partial sectional view of a temperature control device according to the invention,

Fig. 2

a perspective view in partial sectional view of a section of the device of Fig. 1 .

Fig. 3

another, simplified perspective view of the section of Fig. 2 .

Fig. 4

a side view of an expansion vessel of the device of Fig. 1 .

Fig. 5

a perspective view of the expansion vessel of Fig. 4 and

Fig. 6

a known from the prior art tempering.

In the Fig. 1 shown tempering device 101 has a container 103 in which a helical heater 105 and a cooling device 107 are arranged nested. In particular, the heater 105 is disposed radially inside the cooler 107 in the container. The cooling device 107 is a helically configured evaporator, which is connected to a refrigeration circuit, which also has a compressor 109, a condenser, an expansion device (not shown) and serving as a suction gas cooler 111 second evaporator. The container 103 is part of a fluid guide 112, is guided in the tempering, wherein the heater 105 for heating the temperature control, in particular to temperatures of up to + 400 ° C and the cooling device 107 is designed for cooling the tempering to temperatures of up to -120 ° C.

In the container 103, an impeller 113 is arranged, which is coupled via a shaft 115 with a drive 117. The shaft 115 is led out of the container 103 and disposed within a sleeve 116. Between the sleeve 116 and the shaft 115, a seal 119 is arranged. As noted above, since relatively high temperatures may occur in the container 103, the shaft 115 and sleeve 116 are made relatively long and thin. To dissipate the heat, a bulkhead 121, which is formed of highly thermally conductive material such as aluminum, disposed between the container 103 and the shaft seal 119 at a smooth rotated position of the sleeve 116. By the bulkhead 121 heat is absorbed by the sleeve 116, which is then discharged from the bulkhead 121 to the environment. For this purpose, the bulkhead wall 121 advantageously has cooling ribs. By the bulkhead 121 on the one hand and the long shaft 115 and the long sleeve 116 on the other hand occur in the region of the seal 119 temperatures well below 100 ° C, so that correspondingly simple seals can be used.

As previously mentioned, the container 103 forms part of the fluid guide 112. The fluid guide 112 further comprises a feed line 123 which is guided into the container 103 and supplied with the tempering fluid from the container 103 to a consumer (not shown) connected to the feed line 123 can be. Furthermore, the fluid guide 112 comprises a return line 125, to which also the consumer can be connected and guided by the temperature control fluid back from the consumer into the container 103. As in particular from Fig. 2 it can be seen, the return line 125 and the supply line 123 are on the side of the container 103, which faces away from the side on which the drive 117 is located.

The cylindrical container 103 has an insert of a first, outer tube 127 and a second, inner tube 129. The outer tube 127 forms with an outer wall 131 of the container an outer annular space 133. Between the inner tube 129 and the outer tube 127, an inner annular space 135 is formed and the heater 105 is disposed in the inner annular space 135, while the cooling device 107 in the outer annular space 133 is arranged.

The inner tube 129 rests on the container bottom 137. In contrast, the outer tube 127 is spaced from the container bottom 137. Furthermore, the inner annular space 135 is closed by a plate 139 down. In addition, at the lower end in the inner tube 129, an intermediate bottom 141 is inserted, in the middle of which a passage opening 143 is formed. Between the intermediate bottom 141 and the container bottom 137 is a space 145, in which the impeller 113 is arranged. Moreover, a portion of the inner tube 129 between the intermediate bottom 141 and the container bottom 137 is spirally bent outward in the rotational direction of the impeller 113, so that an opening 146 is formed between the space 145 and the outer annular space 133. From the opening 146 of the inner tube 129 into the outer annular space 133 extends a rising ramp 147 (cf. Fig. 3 ) between the turns of the cooling device 107.

The inner annular space 135 further has a preferably oval opening (not shown) in the wall 149 of the inner tube 129 into which the feed line 123 opens, wherein the feed line 123 is guided tangentially away from the inner tube 129 in the direction of rotation of the impeller 113. In addition, the return line 129 is guided into the interior of the inner tube 129 and opens into a arranged inside the tube collector 151 for returning tempering fluid. The collector 151 is designed in the form of an overflow pot, in which the refluxing fluid flows in and flows over it.

Furthermore, the collector 151 has a venting insert 153, which serves to vent the fluid guide and is designed as an upwardly guided pipe carrying the collector 151. Since it is a closed temperature control, the inner tube 129 is sealed by a further spaced from the upper edge of the overflow 151 further intermediate bottom 155. Below the intermediate bottom 155, the vent pipe 153 is provided with a plurality of passages 157 for discharging gas.

During operation of the tempering device 101, tempering fluid is conducted via the return line 125 into the container 103. In this case, the tempering fluid flows from the return line 125 into the collector 151. The tempering fluid 151 flows over the collector 151 and flows through the passage opening 143 into the space 145. Of the spiral-shaped wing elements of the Pumperads 113, the tempering fluid is placed on the one hand in a rotational movement and on the other hand radially promoted to the outside. In this case, the spirally bent portion of the inner tube 129 serves as a guide for the fluid, which is passed through the opening 146 via the ramp 147 from the space 145 into the outer annular space 133. In particular, the ramp 147 takes advantage of the rotational movement, the fluid between the windings of the cooling device 107, whereby a particular laminar flow around the windings takes place and so a particularly good cooling of the fluid is possible.

The tempering fluid, which still rotates in the outer annular space 133 in accordance with the rotational direction predetermined by the impeller 113, flows upward in the outer annular space 133, where it flows around the cooling device 107 arranged in the outer annular space 133. In this case, when the cooling device 107 is operated, the tempering fluid is cooled to a desired temperature. In the upper container region 103, the tempering fluid passes from the outer annular space 133 into the inner annular space 135, where it sinks and thereby flows around the heating device 105. When operated as an alternative to the cooling device 107 heater 105 heats up the tempering fluid to a desired temperature. The cooling device 107 and the heating device 105 can also be operated simultaneously. As a result, as mentioned above, the fluid can be heated to a desired temperature within a smaller tolerance range.

From the inner annular space 135, the tempering fluid is discharged via the feed line 123. Since the supply line 123, as mentioned above, according to the direction of rotation of the tempering fluid tangentially connected to the wall of the inner tube and the opening in the wall is formed correspondingly oval, the tempering fluid can be particularly well deducted without much change in the direction of flow of the fluid from the container 103 and over the supply line 123 are supplied to the consumer.

As already mentioned above, the cooling device 107 is a first evaporator of the refrigeration cycle, and the suction gas cooler 111 is a second evaporator of the refrigeration cycle, which are connected in series in the refrigeration cycle. In this case, the suction gas cooler 111, as previously with respect to Fig. 1 described, designed as a heat exchanger. The illustrated suction gas cooler 111 is formed by a helical line section of the refrigerant line of the refrigeration circuit, which is connected at one end via a line 159 on the output side to the compressor 109, in particular behind an expansion device, not shown, and with its other end to the input side of the cooling device 107 and through which therefore cold refrigerant flows. The helical line section is arranged around another line section, which is connected at its one end to the compressor 109 on the input side and at the other end to the output side of the cooling device 107 and flows through the therefore warm refrigerant. Therefore, the suction gas cooler 111 cools the warm refrigerant flowing back from the cooler 107 to the compressor 109. This makes it possible to encapsulate the compressor 109. That means no extra cooling for the engine of the compressor 109 is required, but this is cooled only by the gas of the refrigeration cycle.

As shown, the windings of the suction gas cooler 111 are arranged between the drive 117 and the container 103. Since this space is present anyway because of the long shaft 115, the suction cup cooler 111 is thus housed in the apparatus 101 in a space-saving manner. The suction gas cooler 111 is, as already mentioned above, designed as a heat exchanger between cold refrigerant and warm refrigerant, each separated in the suction gas cooler 111 separated from each other in pipes of the refrigeration cycle flows (see. Fig. 2 ).

This in 4 and 5 shown expansion vessel 161 is connected in shunt to the fluid guide 112 of the device 101. In this case, the bottom 163 of the expansion vessel 161 is in the position of use of the device 101 at about the same height as the intermediate bottom 155 above the venting insert 153. Since the device 101 forms a closed temperature control, so the fluid guide is closed to the environment, the expansion vessel 161 is used as a collecting vessel for itself due to a heating expands fluid or as Vorhaltegefäß with cooling fluid. In particular, expansive tempering fluid may flow into the expansion vessel to compensate for the increase in volume of the fluid in the fluid conduit associated with expansion. In contrast, additional tempering fluid can flow from the expansion vessel into the fluid guide to compensate for the decrease in volume of the fluid associated with cooling.

Further, in the center of the bottom 163, a condensed water collecting pot 165 is disposed. As stated, the expansion vessel 161 is connected in shunt to the fluid guide 112. During operation of the device 101, unwanted water contained in the fluid may be due to possible high temperatures Evaporate the fluid and enter the expansion vessel 161 where it condenses, since the expansion vessel 161 is not tempered and therefore is near room temperature. The condensed water sinks in the expansion vessel 161 and enters the collection pot 165. For this purpose, preferably, as in Fig. 4 is shown, the bottom 163 bevelled towards the collection pot 165. The water can then be removed from the collecting pot 165, for example via a pipe arranged at the collecting pot 165.

In addition, an illuminable sight glass with a level indicator (not shown) may be arranged on the device 101 to indicate the level of the tempering fluid in the fluid line. Preferably, the level of the level indicator corresponds approximately to the level of the expansion vessel 161. The level indicator can also be provided to display the water level in the collection pot 165. In this case, the collection pot 165 is connected via a communicating tube 167 to the lower region of the sight glass. As by heating the tempering fluid, as described above, an expansion desselbigen done, the current in the expansion vessel 161 fluid can pressurize the water contained in the collection pot 165 so that a thrust is generated in the tube 167, which is penetrating water in the sight glass is visible and observable for a user via the sight glass. This allows the user to recognize whether water has settled in the collection pot 165 and possibly drain it.

Furthermore, the sight glass can be designed as a filling device for the fluid circuit. For this, the device 101 can be opened in the region of the sight glass in order to be able to top up fluid, wherein the largest possible filling opening is provided.

LIST OF REFERENCE NUMBERS

1

tempering

3

heater

5

first evaporator

7

Refrigeration circuit

9

compressor

10

condenser

11

second evaporator

12

expansion valve

13

cylinder

15

impeller

17

wave

19

drive

21

fluid guide

23

supply line

25

Return line

27

bulkhead

101

tempering

103

container

105

heater

107

cooling device

109

compressor

111

Sauggaskühler

112

fluid guide

113

impeller

115

wave

116

shell

117

drive

119

poetry

121

bulkhead

123

supply line

125

Return line

127

outer tube

129

inner tube

131

outer wall

133

outer annulus

135

inner annulus

137

container bottom

139

plate

141

false floor

143

Through opening

145

room

146

opening

147

ramp

149

Wall of the inner annulus

151

collector

153

ventilation use

155

false floor

157

Through opening

159

management

161

expansion tank

163

Bottom of the expansion vessel

165

collecting pot

167

communicating tube

Claims (14)

1. An apparatus for the temperature control of a temperature control fluid, in particular of a heat transfer oil, having a heating device (105) which is in particular helical; having a cooling device (107) which is in particular formed by the evaporator of a refrigerant circuit; and having a closed fluid guide (122) for guiding the temperature control fluid in the apparatus (101) as well as between the apparatus and a consumer and having an expansion vessel (161),
   characterized in that
   a collection pot (165) for condensed water is provided beneath the base (163) of the expansion vessel (161), in particular at its center, with the expansion vessel (161) being connected in a bypass to the fluid guide (112),
   and with an extraction unit for draining water from the collection pot (165) being arranged at the collection pot (165).
2. An apparatus in accordance with claim 1,
   characterized in that
   the base (163) is formed chamfered with respect to the collection pot (165).
3. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   the expansion vessel (161) is connected to the fluid guide (112) above the collection pot (165).
4. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   a sight glass, which can in particular be illuminated and which has a level display to display the level of the temperature control fluid, is provided which is connected to the expansion vessel (161) by means of a communicating pipe (167),
   with, preferably, a lower region of the sight glass being in fluid communication with a lower region of the collection pot (165), and/or with, preferably, the sight glass being formed as a filling apparatus for the fluid circuit.
5. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   the heating device (105) and the cooling device (107) are arranged nested in one another,
   with, preferably, the heating device (105) and the cooling device (107) being arranged in a common container (103) which is in particular cylindrical and which is part of the fluid guide (112); and/or in that a circulation device (113), in particular a pump wheel, is arranged in the fluid guide (112), in particular in the common container (103) for the heating device (105) and the cooling device (107).
6. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   the heating device (105) and/or the cooling device (107) is/are arranged in a container (103) and a circulation device (113) arranged in the container (103) is configured such that the temperature control fluid is set into rotation in the container (103), with means (147) being provided by which the rotating temperature control fluid is guided in the coil direction between the coils of the heating device and/or cooling device (105, 107).
7. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   the temperature control fluid flows in a vertical direction in the region of the heating device (105) and of the cooling device (107) and with, preferably, the container (103) being configured as a cylinder having a cylinder axis which is vertical in use.
8. An apparatus in accordance with at least one of the preceding claims,
   characterized in that
   the container (103) has a container insert (127), in particular a pipe, which is arranged between the heating device (105) and the cooling device (107) and which provides a respective separate space (133, 135) for them which can be flowed through by temperature control fluid,
   with, preferably, the container insert comprising a second, inner pipe (129) which is arranged within the first, outer pipe (127) such that an inner annular space (135) is formed between the inner pipe (129) and the outer pipe (127) and an outer annular space (133) is formed between the outer pipe (127) and the container (103), with the heating device (105) being arranged in the inner annular space (135) and the cooling device (107), which is in particular formed by coils of an evaporator, being arranged in the outer annular space (133) or vice versa,
   with, further preferably, the outer pipe (127) being configured as an overflow pipe, and with the temperature control fluid being supplied via the flow line (123) to one of the two annular spaces (133, 135) and moving into the other annular space (135) by flowing over.
9. An apparatus in accordance with claim 8,
   characterized in that
   the inner pipe (129) stands on the base (137) of the container (103), while the outer pipe (127) has a spacing from the container base (137); in that the inner annular space (135) is closed toward the bottom by a plate (139); and in that the outer annular space (133) has a connection to the return line (125) at the lower end,
   with, preferably, an intermediate base (141) being inserted in the inner pipe (129) at the lower end and having a passage opening (143), which is in particular arranged centrally, with an impeller pump (113) being inserted in the space (145) between the intermediate base (141) and the container base (137), and with this space (145) being connected to the outer annular space (133) via an opening (146) in the inner pipe (127);
   with, further preferably, the opening (146) being formed by a section of the inner pipe (129) curved outwardly in spiral form in the direction of rotation of the impeller pump (113) between the intermediate space (141) and the container base (137); and/or with, further preferably, an upwardly inclined ramp (147) being provided which extends from the opening (146) of the inner pipe (129) into the outer annular space (133) and which is preferably guided between the coils of a heating device or cooling device in the outer annular space; and/or with, further preferably, the inner annular space (135) being connected to a flow line (123) via an opening, which is preferably oval, in the wall (149) of the inner pipe (129), with, even further preferably, the flow line (123) being led tangentially away from the inner pipe (129) in the direction of rotation of the impeller pump (113).
10. An apparatus in accordance with at least one of the preceding claims,
    characterized in that
    the return line (125) of the fluid guide is guided into the interior of the inner pipe (129),
    with, preferably, the container (103) having at its center a collector (151) for returning temperature control fluid into which the return line (125) opens, with the collector (151) preferably having a venting device (153) for venting the fluid guide;
    and with, further preferably, the collector (151) being formed as an overflow pot and the inner pipe (129) being tightly closed by a further intermediate base (155) spaced apart from the upper margin of the overflow pot.
11. An apparatus in accordance with at least one of the preceding claims,
    characterized in that
    the return line (125) and the flow line (123) of the temperature control fluid are guided into the container (103) at the same side, with, preferably, the drive (117) for the circulation device (113) being arranged at the side of the container (103) which is remote from the side at which the return line (125) and the flow line (123) are guided into the container (103).
12. An apparatus in accordance with any one of the preceding claims,
    characterized in that
    the pump wheel (113) is coupled to a drive (117) arranged outside the container (103) via a long shaft (115), with a heat transfer plate (121) preferably being arranged between the container (103) and the drive (117);
    and/or in that the refrigerant circuit has a second evaporator as a so-called suction gas cooler (111) which is connected upstream of the compressor (109) as a heat exchanger for cooling the refrigerant means.
13. An apparatus in accordance with at least one of the preceding claims,
    characterized in that
    it has a drive (117) driving an impeller pump (113) in a container (103); a long shaft (115) between the impeller pump (113) and the drive (117); and a suction gas cooler (111), with the suction gas cooler (111) being arranged between the container (103) and the drive (117).
14. An apparatus in accordance with at least one of the preceding claims,
    characterized in that
    the fluid guide has the expansion vessel (161) for the temperature control fluid which is preferably arranged such that the base (163) of the expansion vessel (161) is located approximately at the same level as the further intermediate base (155) sealing the venting device (153) for the fluid guide in the position of use of the apparatus (101).

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