DE9310030U1 - System for cooling and heating rooms with a single distribution system - Google Patents

Description

K 651-52-ka
27 May 1993

Registrant: Mr. Hans-Jürgen Kempke, Wilmersdorferstr.39

1000 Berlin 12
and Mr. Wolfgang Lüder, Steubenstr. 2 5

6800 Mannheim-23

System for cooling and heating rooms with a single distribution system

The innovation concerns a system according to the generic term of claim 1. Such a system is
known to the state of the art insofar as
since/3 it is known to heat rooms, especially offices, using hot water heating.

Heating energy is provided by a boiler, a district heating supply or electrically and in a conventional manner the heated heating water is
a number of radiators.

With such heating systems there is a need

especially in summer or when there is high heat load from devices in the room. So far, it is only known to cool the room using a separate air conditioning system, which

0 involves a lot of effort. There are air conditioning systems that circulate a constant flow of air
and thereby cool down, which has the disadvantage of high
Air movements and high energy consumption
is.

There are also water cooling systems in which an air flow is taken from a cooled heat exchanger and fed into the room. This has the disadvantage that additional ventilation ducts must be used to supply air to a number of rooms.

The innovation is therefore based on the task of proposing a system for cooling and heating rooms, which does not require additional air ducts for an air conditioning system.

To solve the problem posed, the innovation is characterized by the technical teaching of claim 1.

The key feature of the innovation is that cooling and heating are now carried out using a single, existing radiator, which means that there is no need for cooling ducts for air flow.

This results in the main advantage that, especially after the innovation, large office buildings with a large number of office spaces can now be either cooled and heated or only heated and, at the tenant's request, this can be achieved by means of an appropriate additional device on the radiator.

0 If the tenant of the office space does not require a corresponding cooling system, he will receive normal panel radiators through which warm water flows and which provide normal room heating.

If, however, he wants additional cooling and

Air conditioning of his office space, then the radiator is equipped with an additional fan, which is preferably integrated in the radiator and it also receives a control with which it is possible to regulate the flow of cooled water through the radiator and to also control the fan with the control circuit.

The present innovation proposes a heating system that can supply the individual radiators with both hot and cold water via the hot water supply.

For the office building mentioned, such a cold water supply would be provided centrally and depending on whether the tenant wants a cooling system in his office or not, he will receive the previously mentioned fan with the previously mentioned 0 control circuit in his office in addition to his assigned radiators.

This has the significant advantage that a cooling system can be installed centrally in the building and tenants can choose whether they want air-conditioned rooms or only heated rooms.

This means that additional air ducts, air conditioning systems and other complex equipment are not required.

According to a preferred embodiment of the present innovation, it is provided that the heating system is coupled with a heat exchanger through which cold water flows. In this way, it is

-A-

By controlling the heat exchanger, it is possible to send cooled water into the heating system instead of heated water and thus supply all radiators with this cooled water, which then work as room coolers.

The provision of cooled water that flows through the heat exchanger can be done in several ways.

In a first preferred embodiment, it is provided that the cooled water from a large water tank is used for spring systems, whereby this water tank is designed as a buffer storage tank according to the innovation. It is known to provide buffer storage tanks for spring systems in large office buildings, which can have a capacity of 10 m to 200 m. According to the innovation, such a buffer storage tank is now used as a water tank for supplying cold water to the heat exchanger, through which the heating water flows in its secondary circuit.

This now offers the significant advantage that chilled water can be obtained in a relatively simple manner, since it is now sufficient to cool the water tank using a chiller and an associated heat exchanger, whereby the chiller is preferably operated with night-time electricity in order to achieve the most cost-effective provision of cold water.

This cold water is circulated from this water tank and flows through the heat exchanger through which the heating water flows.

5 In summer, this heat exchanger is in operation,

The normal boiler system is switched off, while in winter this heat exchanger is switched off and the normal boiler operation takes place with heating water.

All radiators in the possibly large office building are supplied with one and the same heating or cooling water, whereby - as stated above - the tenant who wants cooling increases the cooling capacity of his radiator or cooling body by regulating the flow rate in the supply line and at the same time controlling a fan depending on the desired room temperature, which draws the room air through the cooling body.

To prevent condensation on the cooling element, it is initially intended that only a flow temperature of about 15 - 20° C is used in order to avoid condensation.

It is known that the surface temperature of such a cooling body in the room is about 2° C higher than the flow temperature.

In certain adverse weather conditions (e.g.

However, in the case of high humidity levels, it can still happen that condensation occurs unintentionally on the cooling element. To avoid this, a hydrometer (a humidity meter) is installed centrally on the building, depending on the weather, in order to record the prevailing humidity. Depending on the prevailing humidity, the flow temperature is then increased by around 2° C in humid weather in order to avoid the previously mentioned condensation phenomena even at high room humidity and air humidity.

The idea here is that if a relatively low room temperature is desired or if the flow temperature is regulated to relatively high values in order to avoid condensation, the fan is switched on to improve the performance of the cooling element accordingly. Due to the air flow through the fan, unwanted condensation on the cooling element is also avoided.

The subject matter of the present innovation arises not only from the subject matter of the individual protection claims, but also from the combination of the individual protection claims with one another.

All information and features disclosed in the documents, including the summary, in particular the spatial configuration shown in the drawings, are claimed as essential to the invention insofar as they are new individually or in combination compared to the prior art.

The innovation is explained in more detail below using drawings that merely show one way of implementing it. The drawings and their descriptions reveal further key features and advantages of the innovation.

Show it:

Figure 1: schematically shows an embodiment of a system according to the innovation;

Figure 2: schematically shows an electrical circuit diagram.

A climate heating element 1 according to the innovation has water flowing through it and is combined with a fan 2, which is designed as a roller fan. This fan 2 is controlled by a motor 3. When the motor 3 is running, the room air is forced through the climate heating element 1. The air is sucked in from above and blown out downwards.

The air conditioning radiator 1 is located in the area of a flow line 11 of a conventional heat circuit, but in addition, a motor valve 10 is arranged in the flow line at the inlet of the air conditioning radiator. The flow line 11 is coupled to a heat generator 15 known per se, which supplies the flow and return lines 11, 12 of the air conditioning radiator 1 via a mixing valve 16 and the return line 13 as well as the flow line 14.

It goes without saying that instead of the one climate radiator 1 shown here, there are a large number of climate radiators connected in series.

The heat generator 15 can be designed in any way; it can be designed as an oil boiler, gas boiler, gas turbine, electric heat generator or the like.

It is important that the known heating circuit consisting of the flow lines 11 and 12 and the lines 13 and 14 is coupled with a cooling circuit according to the new design. In this case, further lines 21,24 are provided branching off from the flow and return lines 11,12, which

to a second mixing valve 17. In the area of the line 21 there is a heat exchanger 20, which is flowed through in its primary circuit by a flow line 22, which flows into a tank 24 via a return line 23. The tank has a considerable capacity of e.g. 10 to 200 m3 and is designed, for example, as a buffer storage tank for a sprinkler system. Cold water is generated in this tank 24, in which a further heat exchanger 25 is arranged, which is coupled to a refrigeration unit 26. The water taken from the tank in the flow process therefore flows through the primary circuit of the heat exchanger 20 and thus cools the water of the heating system, which is led through the secondary circuit of the heat exchanger 20 via the line 21.

The mixing valve 17 is used to set the desired flow temperature of the refrigeration circuit in the lines 11, 12, whereby temperatures in the 0 range between 15 and 20° C are generally used.

In this case, the mixing valve 17 is also flowed through by a line 19 which branches off directly from the return line of line 12.

The motor 18 of the mixing valve 17 is controlled by a flow sensor (not shown in detail), which is connected to a control device, whereby this flow sensor is arranged in the area of the flow 11.

This sets the required flow temperature in the refrigeration circuit.

In the circuit diagram according to Figure 2, the entire system is switched on or off via the central switch 27.

There is then another switch 8, which contains several switching contacts.

The room temperature is detected via sensor 7 and, depending on this, the switch is switched to the cooling position (contact 29) or the heating position (contact 28).

There is then a changeover switch which can either be operated manually or set centrally, whereby contact 31 initiates the cooling process, while contact 30 switches on the heating system.

The switching arrangement of switch 8 acts on the motor valve 10 in the flow line 11 on the air conditioning heater 1.

When the temperature drops, the sensor 7 therefore switches the contact 29 to the contact 28, the changeover switch is in this case set to contact 3 0 and the motor valve 10 is then controlled accordingly so that the valve opens and the heating output is increased by the air conditioning radiator.
25

In the switching position shown, cooling is shown, i.e. the sensor 7, which is connected to the room thermostat 6, has closed the contact 29 and the changeover switch has also closed the contact 31, 0 whereby the motor valve 10 is controlled accordingly and, when cooled water flows through the air conditioning radiator 1, the cooling capacity is set via the flow of the air conditioning radiator.

If the cooling capacity is not achieved after a

certain time, then a contact is closed via a timer 4, which switches on the motor 3 of the cooling fan. The fan 2 then provides an increased cooling capacity of the air conditioning radiator.

In the circuit diagram according to Figure 2, a switching arrangement 32 is also shown, which shows that with this switching arrangement one can control any number of downstream air conditioning heating elements I, whereby associated relays 33, 35 are present, which control the corresponding associated motor valve 10a or the associated fan motors 3a.

DRAWING LEGEND

1 air conditioning radiator

2 fans

3 Engine 3a Fan

4 timer

6 Room thermostat

7 sensors

8 switches

10,10a Motor valve 11 flow

12 Return

13 Return (RH)

14 Lead (VH)

15 Heat generator 16 Mixing valve

17 "

18 Engine

19 Management

20 Heat exchanger 5 21 Line 2 2 Line 2 3 Return

24 tanks

25 heat exchangers

2 6 Refrigeration unit

27 switches

28 Contact

29 "

30 "

31 "

32 Switching arrangement

33 Relay

3 4 Line 35 Relay

Claims (13)

PATENT ATTORNEY DR.-ING. PETEfc TRIEBLING Dipl.-Ing. EUROPEAN PATENT ATTORNEY Rennerle 10, PO Box 3160 D-8990 Lindau (Bodensee) Telephone (083 82) 7 80 Fax (083 82) 7 80 05 K 651-52-ka 27 May 1993 10 Registrant: Mr. Hans-Jürgen Kempke, Wilmersdorferstr.39 1000 Berlin 12 and Mr. Wolfgang Lüder, Steubenstr. 2 5 6800 Mannheim 23 I15 f Protection claims »I 1. System for heating and cooling a multi-room 2» 2 0 building consisting of, I - a source of thermal energy by means of which I - a quantity of heating water contained in a heating water boiler is heated to a desired temperature, - one or more air conditioning radiators, which are 25 - a hot water supply with a circulating pipe system connected in series with each other and with the heating water boiler, and through which air-conditioning radiators the heated heating water is pumped when - a control unit sends a corresponding signal to 3 0 - a pumping device, thereby characterized in that the air conditioning radiator(s) (1) can be supplied with either hot or cold water via the hot water supply (10,a, 11,15) of the air conditioning radiators (1). 35 Telex: Bank accounts: Postal checking account 5 43 74 (patent-d) Bayer. Vereinsbank Lindau (B) No. 1257 110 (bank code 735 200 74) Munich 414 848-808 Telegram address: Hypo-Bank Lindau (B) No. 66 70-326 843 (RLZ 733 204 42) (Bb2 702100*0) patri - lindau Volkibai ,k Lindau (D) No. 51 222 000 (bank code 735 901 20) 2. System according to claim 1, characterized in that a central cold water supply is provided and each individual air conditioning radiator (1) is optionally equipped with a cooling device in order to regulate the flow rate of the cooled water in the supply line of the air conditioning radiator (1). 3. System according to claim 2, characterized in that the cooling device essentially comprises a fan (2) and a control device (4,6,7,8) which controls the flow rate of cooled water in the flow through the air conditioning radiator (1). 4. System according to claim 3, characterized in that the fan (2) is integrated in the air conditioning radiator (1), whereby it generates a forced convection flow through the air conditioning radiator (1). 5. System according to claim 3 and 4, characterized in that the blower (2) is a roller blower. 6. System according to claim 3, characterized in that the fan (2) can be switched on by means of a signal from the control device (4,6,7,8) depending on the desired room temperature in order to increase the performance of the air conditioning heater (1). 7. Plant according to claim 2, characterized characterized by the cold water supply supply comprises a heat exchanger (20) through which the cooled water flows in the primary circuit (21,34) and through which the heating water flows in the secondary circuit (22,23) in order to cool the heating water flow when activated. 8. System according to claim 7, characterized in that the cooled water in circulation is taken from a buffer storage for spring systems as a water tank (24) to supply the heat exchanger (20), wherein the water tank (24) can be cooled by a cooling unit (26). 9. Plant according to claim 8, characterized characterized in that/3 the refrigeration unit (26) is assigned a heat exchanger (25) which can be operated in particular with night-time electricity. 10. Plant according to claim 1, characterized characterized by the fact that the flow temperature of the cold water is regulated to about 15° - 20° C. 11. System according to claim 7, characterized in that the cold water supply has a humidity sensor which is arranged centrally in the building and is connected to the control of the heat exchanger (20) in order to increase the flow temperature by about 2° C when the condensation point is reached. 12. System according to claim 6 and 11, characterized in that when the condensation point is reached, the fan (2) can be switched on. 13. Plant according to claim 1 and 8, characterized characterized in that/3 a mixing valve (17) is provided in the flow of the air conditioning radiator (1), which in the secondary circuit (21,34) connects the inlet side of the heat exchanger (20) with the outlet of the heat exchanger with appropriate control.