High and low temperature cold and hot all-in-one machine
By introducing a liquid tank and two refrigeration units into the high and low temperature integrated heating and cooling unit, and using an electric three-way valve to control the medium circulation, the problem of unstable medium temperature affecting heating and cooling efficiency is solved, and stable control of medium temperature and efficient heating and cooling are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-03-03
AI Technical Summary
Existing high and low temperature integrated heating and cooling machines lack a medium recycling structure, which affects heating and cooling efficiency when the medium temperature is unstable.
A high-low temperature integrated cooling and heating unit was designed, comprising a liquid tank, a first refrigeration unit, and a second refrigeration unit. Through the control of an electric three-way valve, combined with a heater and two sets of refrigeration units, the medium can be recycled and the temperature can be adjusted rapidly. The cascade low-temperature and high-temperature refrigeration systems of the first and second refrigeration units are used to achieve precise control of low and high temperatures, respectively.
Stable control of the medium temperature was achieved, heating and cooling efficiency was improved, and the medium could quickly reach the target temperature under different temperature requirements.
Smart Images
Figure CN223965718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of high and low temperature integrated heating and cooling, and in particular to a high and low temperature integrated heating and cooling machine. Background Technology
[0002] A high and low temperature integrated unit is a device capable of precise control over a wide temperature range. It integrates multiple functions such as refrigeration, heating, circulation, and control, enabling rapid temperature rise, fall, and stabilization to meet complex and ever-changing experimental and production needs. Based on thermodynamic principles, the unit achieves precise temperature regulation through refrigerant circulation or heating with electric heating elements. The refrigeration section typically utilizes a refrigeration compressor unit (including an evaporator, compression chamber, and condenser), while the heating section may employ electric heating or other heat sources. Within a closed-loop system, the circulation of the working medium facilitates heat absorption, transfer, and release, thereby achieving temperature control. Therefore, a high and low temperature integrated unit is needed.
[0003] Existing high and low temperature integrated heating and cooling machines typically only have the function of conveying the medium. During the conveying process, the medium usually enters from one end and flows out from the other end, and is heated or cooled as needed. However, they lack the ability to recycle the medium and lack a structure for rapid processing of media at different temperatures. When the medium temperature is unstable, it will affect the efficiency of heating and cooling. Utility Model Content
[0004] The purpose of this utility model is to provide a high and low temperature integrated heating and cooling machine to solve the problems mentioned in the background art. Existing high and low temperature integrated heating and cooling machines usually only have the function of medium flow and transmission. During the transmission, the medium usually enters from one end and flows out from the other end. Heating or cooling is performed as needed, but there is no recycling of the medium. Moreover, there is no structure for rapid processing of media at different temperatures. When the medium temperature is unstable, it will affect the heating and cooling efficiency.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high and low temperature integrated cooling and heating machine, comprising a liquid tank, a first refrigeration unit, and a second refrigeration unit. A liquid temperature sensor is fixedly installed through one side of the liquid tank. A circulation pump is connected to one side of the liquid tank via a pipe. A heater is connected to one side of the circulation pump via a pipe. The outlet end of the heater is provided with a liquid outlet. An electric three-way valve is connected to the other side of the liquid tank via a pipe. A return port is connected to one side of the electric three-way valve. An expansion tank is connected to the top of the liquid tank via a pipe. A pressure cover is provided at one end of the expansion tank. A liquid level display is provided on one side of the expansion tank. The first refrigeration unit is connected to one side of the electric three-way valve via an electric three-way valve, and the second refrigeration unit is connected to the other side of the electric three-way valve via an electric three-way valve.
[0006] The refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, an evaporative condenser, and a dryer filter. Two sets of each of the oil separator, compressor, and dryer filter are provided. The water-cooled condenser is used to reduce the temperature of the medium. The oil separator is used to discharge lubricating oil from the high-pressure steam. The compressor is used to increase the gas density. The gas-liquid separator is used to separate and retain the refrigerant liquid in the return gas pipe, preventing liquid from entering the compressor. The evaporator is used to absorb heat from the gas. The evaporative condenser is used to remove a large amount of heat using the latent heat of vaporization of water. The dryer filter is used to filter out impurities such as water vapor, dust, and welding slag from the system.
[0007] The second refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, and a dryer filter, and each is provided as a set.
[0008] Preferably, the water-cooled condensers of the first refrigeration unit and the second refrigeration unit are respectively connected to the cooling water outlet and the cooling water inlet, and the electric three-way valves two and three are respectively connected to the evaporator pipes in the first refrigeration unit and the second refrigeration unit.
[0009] Preferably, the refrigeration unit includes an evaporator and an evaporator-condenser, and the evaporator and the evaporator-condenser are connected by a thermal expansion valve, a dryer filter and a liquid charging valve, the evaporator and the compressor are connected by a liquid charging valve and a low-pressure control valve, and the compressor and the oil separator are connected by a high-pressure control valve through a pipeline.
[0010] Preferably, the evaporator-condenser is connected to the gas-liquid separator via a liquid filling valve, the gas-liquid separator is connected to the compressor via a low-pressure control valve, the compressor is connected to the oil separator via a high-pressure control valve, and the oil separator is connected to the water-cooled condenser via a pipeline.
[0011] Preferably, a thermal expansion valve, a drying filter, and a liquid filling valve are provided at the connection between the other opening of the evaporator and the water-cooled condenser pipe.
[0012] Preferably, the second refrigeration unit includes a water-cooled condenser and an evaporator. The openings on both sides of the evaporator are connected to pipes of the water-cooled condenser. One set of pipes is sequentially equipped with a liquid charging valve, a gas-liquid separator, a low-pressure regulator, a compressor, a high-pressure regulator, and an oil separator. The other set of pipes is sequentially equipped with a thermal expansion valve, a dryer filter, and a liquid charging valve.
[0013] Preferably, the first refrigeration unit is connected to the liquid tank pipeline via the second electric three-way valve and the first electric three-way valve, and the second refrigeration unit is connected to the liquid tank pipeline via the third electric three-way valve.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This high and low temperature integrated cooling and heating machine, through the arrangement of refrigeration unit one, refrigeration unit two, and heater, when heating is needed, the lower interface of the electric three-way valve is opened, the heater is started, and the medium is heated. When cooling is needed, the left and right interfaces of electric three-way valve one are opened, and the upper interfaces of electric three-way valve two and electric three-way valve three are opened, and the medium is cooled by the evaporator of refrigeration unit one. Refrigeration unit one is a cascade low temperature refrigeration system, composed of two refrigeration systems, which can obtain very low evaporation temperatures. When the medium temperature is lowered to a relatively low value, and there is a constant external heat source, the left and right joints of electric three-way valve one are open, and the lower interfaces of electric three-way valve two and electric three-way valve three are open. The medium passes through the evaporator of refrigeration unit two and is continuously cooled to the target temperature value. The cooling capacity of refrigeration unit two is greater than the heat of the external heat source, making it a high-temperature refrigeration system. Secondly, the liquid level indicator and pressure cap on the expansion tank are used to ensure that the pipeline system maintains a certain pressure when the medium is heated to a certain temperature, so as to prevent the medium from vaporizing. The pressure cap can be customized according to the physical properties of the medium. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the liquid tank and heater of this utility model.
[0016] Figure 2 This is a schematic diagram of the liquid heating and cooling circulation system of this utility model;
[0017] Figure 3 This is a schematic diagram of the high and low temperature cooling and heating cycle system of this utility model;
[0018] Figure 4 This is a schematic diagram of the liquid discharge and return heating system of this utility model;
[0019] Figure 5 This is a schematic diagram of a cooling cycle system of the refrigeration unit of this utility model;
[0020] Figure 6 This is a schematic diagram of the cooling cycle system of the refrigeration unit of this utility model.
[0021] In the diagram: 1. Liquid tank; 2. Liquid temperature sensor; 3. Circulation pump; 4. Heater; 5. Liquid outlet; 6. Electric three-way valve 1; 7. Liquid return port; 8. Expansion tank; 9. Pressure cover; 10. Liquid level indicator. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figure 1-6 This utility model provides a technical solution: a high and low temperature integrated cooling and heating machine, including a liquid tank 1, a first refrigeration unit and a second refrigeration unit. A liquid temperature sensor 2 is fixed through one side of the liquid tank 1. A circulation pump 3 is connected to one side of the liquid tank 1. A heater 4 is connected to one side of the circulation pump 3. The outlet end of the heater 4 is provided with a liquid outlet 5. An electric three-way valve 6 is connected to the other side of the liquid tank 1. A return port 7 is connected to one side of the electric three-way valve 6. An expansion tank 8 is connected to the top of the liquid tank 1. A pressure cover 9 is provided at one end of the expansion tank 8. A liquid level display 10 is provided on one side of the expansion tank 8. One side of the electric three-way valve 6 is connected to the first refrigeration unit through an electric three-way valve 2. The other opening of the electric three-way valve 6 is connected to the second refrigeration unit through an electric three-way valve 3.
[0024] The refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, an evaporative condenser, and a dryer filter. There are two sets of oil separators, compressors, and dryer filters. The water-cooled condenser is used to reduce the temperature of the medium. The oil separator is used to discharge the lubricating oil in the high-pressure steam. The compressor is used to increase the gas density. The gas-liquid separator is used to separate and retain the refrigerant liquid in the return gas pipe to prevent the liquid from entering the compressor. The evaporator is used to absorb heat from the gas. The evaporative condenser is used to remove a large amount of heat using the latent heat of vaporization of water. The dryer filter is used to filter out impurities such as water vapor, dust, and welding slag in the system.
[0025] The second refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, and a dryer filter, and each is provided as a set.
[0026] Furthermore, the water-cooled condensers of refrigeration unit one and refrigeration unit two are respectively connected to the cooling water outlet and the cooling water inlet, and the electric three-way valve two and electric three-way valve three are respectively connected to the evaporator pipes in refrigeration unit one and refrigeration unit two.
[0027] Furthermore, the refrigeration unit includes an evaporator and an evaporator-condenser, and the evaporator and evaporator-condenser are connected by a thermal expansion valve, a dryer filter and a liquid charging valve, the evaporator and compressor are connected by a liquid charging valve and a low-pressure control valve, and the compressor and oil separator are connected by a high-pressure control valve through a pipeline.
[0028] Furthermore, the evaporator-condenser is connected to the gas-liquid separator via a liquid charging valve, the gas-liquid separator is connected to the compressor via a low-pressure control valve, the compressor is connected to the oil separator via a high-pressure control valve, and the oil separator is connected to the water-cooled condenser via a pipeline.
[0029] Furthermore, the other side of the evaporator condenser is connected to the water-cooled condenser pipe and is equipped with a thermal expansion valve, a dryer filter, and a liquid charging valve.
[0030] Furthermore, the second refrigeration unit includes a water-cooled condenser and an evaporator. The openings on both sides of the evaporator are connected to pipes of the water-cooled condenser. One set of pipes is sequentially equipped with a liquid charging valve, a gas-liquid separator, a low-pressure regulator, a compressor, a high-pressure regulator, and an oil separator. The other set of pipes is sequentially equipped with a thermal expansion valve, a dryer filter, and a liquid charging valve.
[0031] Furthermore, refrigeration unit one is connected to liquid tank 1 via electric three-way valve two and electric three-way valve one 6, and refrigeration unit two is connected to liquid tank 1 via electric three-way valve three.
[0032] Working principle: First, the cooling water inlet and return port 7 both transport the medium to the liquid tank 1. When the refrigeration unit 1 needs to cool down, the left and right ports of the electric three-way valve 6 are open, and the upper ports of the electric three-way valves 2 and 3 are also open. The medium flows through the pipeline to the evaporator of the refrigeration unit 1, then through the compressor and oil separator, and then into the water-cooled condenser. After passing through the water-cooled condenser, it flows to the evaporator-condenser, and then continues to circulate through the electric three-way valve 3. When the temperature is cooled to a suitable level, it can be discharged through the cooling water outlet. When the refrigeration unit 2 needs to cool down, the left and right ports of the electric three-way valve 6 are open, and the lower ports of the electric three-way valves 2 and 3 are open. The medium circulates through the evaporator of the refrigeration unit 2. Similarly, after cooling to the target temperature, it can be discharged through the cooling water outlet. When heating is required, the lower port of the electric three-way valve 6 is open, the heater 4 is started, and the medium is transported by the circulating pump 3, heated to the target temperature by the heater 4, and then discharged through the liquid outlet 5.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high and low temperature integrated cooling and heating unit, comprising a liquid tank (1), a first refrigeration unit, and a second refrigeration unit, characterized in that: A liquid temperature sensor (2) is fixed through one side of the liquid tank (1). A circulation pump (3) is connected to one side of the liquid tank (1). A heater (4) is connected to one side of the circulation pump (3). A liquid outlet (5) is provided at the outlet end of the heater (4). An electric three-way valve (6) is connected to the other side of the liquid tank (1). A return port (7) is connected to one side of the electric three-way valve (6). An expansion tank (8) is connected to the top of the liquid tank (1). A pressure cover (9) is provided at one end of the expansion tank (8). A liquid level display (10) is provided on one side of the expansion tank (8). A refrigeration unit (1) is connected to one side of the electric three-way valve (6) through an electric three-way valve (2). The other opening of the electric three-way valve (6) is connected to the refrigeration unit (2) through an electric three-way valve (3). The refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, an evaporative condenser, and a dryer filter. Two sets of each of the oil separator, compressor, and dryer filter are provided. The water-cooled condenser is used to reduce the temperature of the medium. The oil separator is used to discharge lubricating oil from the high-pressure steam. The compressor is used to increase the gas density. The gas-liquid separator is used to separate and retain the refrigerant liquid in the return gas pipe, preventing liquid from entering the compressor. The evaporator is used to absorb heat from the gas. The evaporative condenser is used to remove a large amount of heat using the latent heat of vaporization of water. The dryer filter is used to filter out water vapor, dust, welding slag, and other impurities from the system. The second refrigeration unit includes a water-cooled condenser, an oil separator, a compressor, a gas-liquid separator, an evaporator, and a dryer filter, and each is provided as a set.
2. The high and low temperature integrated heating and cooling machine according to claim 1, characterized in that: The water-cooled condensers of the first and second refrigeration units are respectively connected to the cooling water outlet and the cooling water inlet, and the electric three-way valves two and three are respectively connected to the evaporator pipes in the first and second refrigeration units.
3. The high and low temperature integrated heating and cooling machine according to claim 1, characterized in that: The refrigeration unit includes an evaporator and an evaporator-condenser. The evaporator and the evaporator-condenser are connected by a thermal expansion valve, a dryer filter, and a liquid charging valve. The evaporator is connected to the compressor by a liquid charging valve and a low-pressure control valve. The compressor and the oil separator are connected by a high-pressure control valve through a pipeline.
4. A high and low temperature integrated heating and cooling machine according to claim 3, characterized in that: The evaporator-condenser is connected to the gas-liquid separator via a liquid charging valve. The gas-liquid separator is connected to the compressor via a low-pressure control valve. The compressor is connected to the oil separator via a high-pressure control valve. The oil separator is connected to the water-cooled condenser via a pipeline.
5. A high and low temperature integrated heating and cooling machine according to claim 4, characterized in that: The other opening of the evaporator condenser is connected to the water-cooled condenser pipe and is equipped with a dryer filter, a thermal expansion valve, and a liquid charging valve.
6. A high and low temperature integrated heating and cooling machine according to claim 1, characterized in that: The second refrigeration unit includes a water-cooled condenser and an evaporator. The openings on both sides of the evaporator are connected to the water-cooled condenser pipes respectively. One set of pipes is sequentially equipped with a liquid charging valve, a gas-liquid separator, a low-pressure control valve, a compressor, a high-pressure control valve, and an oil separator. The other set of pipes is sequentially equipped with a thermal expansion valve, a dryer filter, and a liquid charging valve.
7. A high and low temperature integrated heating and cooling machine according to claim 6, characterized in that: The first refrigeration unit is connected to the liquid tank (1) via the electric three-way valve 2 and the electric three-way valve 1 (6), and the second refrigeration unit is connected to the liquid tank (1) via the electric three-way valve 3.