Thermostatic Assembly, in Particular for Laboratory Chambers, Climate Chambers, Cold Chambers or Environment Simulation Chambers

Abstract

A thermostatic assembly with a cooling circuit with a coolant is provided. The cooling circuit comprises a cold source, a consumer heat exchanger in the return of the cold source, and a circulation pump. Between the return of the cold source and the forerun of the consumer heat exchanger is disposed a first three-way junction and between the return of the consumer heat exchanger and a forerun of the cold source a second three-way junction is disposed. The first three-way junction and the second three-way junction are connected with a bypass line and the circulation pump is disposed either between the first three-way junction and the forerun of the consumer heat exchanger or between the return of the consumer heat exchanger and the second three-way junction as well as to a laboratory chamber, climate chamber, cold chamber or environment simulation chamber with a sample compartment and such thermostatic assembly.

What is claimed: 
     
         1 . A thermostatic assembly comprising:
 a cooling circuit having a coolant, wherein the cooling circuit further comprises:
 a cold source, 
 a consumer heat exchanger in a return of the cold source, and 
 a circulation pump, 
 wherein between the return of the cold source and a forerun of the consumer heat exchanger is disposed a first three-way junction and between a return of the consumer heat exchanger and a forerun of the cold source a second three-way junction is disposed, 
 wherein the first three-way junction and the second three-way junction are connected with a bypass line and the circulation pump is disposed either between the first three-way junction and the forerun of the consumer heat exchanger or between the return of the consumer heat exchanger and the second three-way junction. 
   
     
     
         2 . The thermostatic assembly of  claim 1 , wherein the first three-way junction and/or the second three-way junction are developed as three-way valves. 
     
     
         3 . The thermostatic assembly of  claim 1 , wherein the first three-way junction is developed as a three-way valve, that the circulation pump is disposed between the return of the consumer heat exchanger and the second three-way junction, wherein the first inlet of the three-way valve is in connection with the return of the cold source, an outlet of the three-way valve is in connection with the forerun of the consumer heat exchanger, and a second inlet of the three-way valve is in connection across the second three-way junction with the return of the circulation pump and the forerun of the cold source. 
     
     
         4 . The thermostatic assembly of  claim 1 , wherein between the first three-way junction and the consumer heat exchanger a heating unit is disposed. 
     
     
         5 . The thermostatic assembly of  claim 1 , wherein the cold source comprises a cold-water reservoir. 
     
     
         6 . The thermostatic assembly of  claim 1 , wherein the cold source is part of a second heat exchanger across which an external refrigerant circuit is coupled to the cooling circuit. 
     
     
         7 . The thermostatic assembly of  claim 6 , wherein the second heat exchanger is developed as a plate heat exchanger or as a coaxial tube heat exchanger. 
     
     
         8 . The thermostatic assembly of  claim 6 , wherein between the second heat exchanger and the bypass line a buffer storage is disposed. 
     
     
         9 . The thermostatic assembly of  claim 6 , wherein a return of the second heat exchanger terminates into the buffer storage and a discharge of the buffer storage is connected with the first three-way junction, in particular with the first inlet of the three-way valve and that preferably a further intake of the buffer storage is connected with a second three-way junction and a further discharge of the buffer storage is connected with a forerun of the second heat exchanger. 
     
     
         10 . The thermostatic assembly of  claim 6 , wherein the second heat exchanger is disposed within the buffer storage. 
     
     
         11 . The thermostatic assembly of  claim 10 , wherein the return of the second heat exchanger is connectable, particularly by a three-way switchover valve, on the one hand with the buffer storage and, on the other hand, by a line directly with the first inlet of the three-way valve. 
     
     
         12 . A chamber comprising:
 a sample compartment; and   a thermostatic assembly comprising:
 a cooling circuit having a coolant, wherein the cooling circuit further comprises:
 a cold source, 
 a heat exchanger in a return of the cold source, and 
 a circulation pump, 
 wherein between the return of the cold source and a forerun of the heat exchanger is disposed a first three-way junction and between a return of the heat exchanger and a forerun of the cold source a second three-way junction is disposed, 
 wherein the first three-way junction and the second three-way junction are connected with a bypass line and the circulation pump is disposed either between the first three-way junction and the forerun of the heat exchanger or between the return of the heat exchanger and the second three-way junction, 
 wherein the heat exchanger is disposed such that it maintains temperature control of the sample compartment. 
 
   
     
     
         13 . A chamber of  claim 12 , wherein the cold source is part of a second heat exchanger across which an external refrigerant circuit is coupled to the cooling circuit, wherein the heat exchanger is disposed such that it maintains temperature control of the sample compartment and wherein the external refrigerant circuit, preferably including the second heat exchanger, is disposed in a machine compartment separated from the sample compartment, which machine compartment in particular comprises ventilation apertures. 
     
     
         14 . A chamber of  claim 13 , wherein the external refrigerant circuit comprises a hydrocarbon, in particular propane or isobutane, as the coolant.