JPH02219940A - Cooling or heating device - Google Patents

Abstract

PURPOSE:To provide a heating or cooling device of which facility cost is less-expensive, input calorie or radiation volume can be adjusted and operating expenditure is low by a method wherein a bypassing passage and a specified flow rate valve are provided, a load calorie is calculated in a first arithmetic circuit and another load calorie (ht) is calculated in a second arithmetic circuit. CONSTITUTION:A sensor S for use in detecting a temperature of thermal carrying fluid returning back to a heat source 1 is provided and a arithmetic means 7 is comprised of a first arithmetic circuit 7a for calculating a load flow rate (qt) through equations I and II in reference to a returning thermal carrying fluid temperature T sensed by the sensor S, a rated temperature difference DELTATh of an indoor heat exchanger 2 got through a setting unit 6, a temperature variation setting value DELTATb of the thermal carrying fluid in a bypassing passage 4 having a value less than 1/10 of the rated temperature difference, a bypassing amount set value (qb) in the bypassing passage 4 and a thermal carrying fluid supplying set temperature Ts, and a second arithmetic circuit 7b for calculating a load calorie (ht) in reference to the equations I, II and III, respectively. A number-of-devices controller 8 so as to make a program in response to the load flow rate (qt) and the load calorie (ht) and decide them automatically is provided, it may accommodate for a substantial variation of load and further an energy loss is positively restricted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a heat source device that supplies a heat transport fluid at a set temperature so that the number of operating heat source devices for heating or cooling can be controlled depending on the load. The present invention relates to a cooling or heating device in which an indoor heat exchanger is connected to a heat transfer fluid circulation path, and a calculation means for calculating a load flow I and a load heat amount based on information from a sensor is provided.

[Conventional technology]

Conventionally, in order to calculate the load flow rate and the load heat amount, as shown in FIG. The flow rate qb detected by the flowmeter (11) is configured to be detected as the load flow rate qt, and the arithmetic circuit (12) detects the flow rate qb detected by the flowmeter (11), the temperature T detected by the sensor (S), and the settings. Based on the set temperature Ts for supplying the heat transfer fluid by the device (6), the load heat amount h() was calculated using the following formula %.

[Problem to be solved by the invention]

However, in order to detect all of the heat transport fluid, an extremely large-diameter flowmeter (11) is required, and the price of commercially available flowmeters increases significantly as the diameter increases, so load detection equipment is expensive. There was room for improvement in the − layer.

An object of the present invention is to reduce equipment costs for load detection.

[Means to solve the problem]

The characteristic structure of the first invention is that a bypass path for the indoor heat exchanger connected to the heat source device is provided in the circulation path of the heat transfer fluid over an outgoing portion and a return portion of the circulation path, and a heat transfer fluid is provided in the bypass path. a constant flow valve that maintains a bypass amount at a set value, a sensor that detects the temperature of the heat transport fluid returning to the heat source device as a sensor that provides information to the calculation means, and a temperature of the heat transport fluid returned by the sensor; T, as well as the indoor heat exchanger rated temperature difference ΔTh determined by the setting device, the temperature change set value ΔTb of the heat transport fluid in the bypass path, the bypass amount set value qb of the bypass path, and the temperature difference of the heat transport fluid. A first calculation circuit that calculates the load flow Iqt according to the following equations (1) and (2) based on the supply set temperature Ts, ΔT=l Ts - T I (2), and the load heat tht according to the above (1). Equation (2) and the following (3
) second arithmetic circuit ht=qtXΔT(3
) is provided in the arithmetic means, and its operation is as follows.

[Function] In other words, a bypass path and a constant flow valve are provided in place of the large-diameter flowmeter in the prior art described above, and the first calculation circuit calculates the load heat amount qt by the above (Equation 11 and Equation (2)), and
In the second arithmetic circuit, the above equations (1), (2), and (3)
The structure is such that the load heat amount ht can be determined by the formula, thereby reducing the cost of equipment for detecting the load.

To explain further, since the bypass path can be made much smaller in diameter than the circulation path, the constant flow valve of the bypass path can be made much cheaper than the large-diameter flowmeter of the prior art described above.

[Means to solve the problem]

A characteristic configuration of the second invention is that a bypass path for an indoor heat exchanger connected to a heat source device is provided in a heat transfer fluid circulation path over an outgoing portion and a returning portion of the circulation path, and a sensor provides information to the calculation means. A sensor is provided to detect the temperature of the heat transfer fluid returning to the heat source device, and a flow meter is provided to detect the bypass amount of the heat transfer fluid in the bypass path, and the return heat transfer fluid temperature T determined by the sensor is determined by the flow meter. Bypass amount qb, rated temperature difference ΔTh of the indoor heat exchanger according to the setting device, and temperature change set value ΔTb of the heat transport fluid in the bypass path,
A first calculation circuit that calculates the load flow rate qt according to the following equations (1) and (2) based on the supply set temperature Ts of the heat transfer fluid, ΔT=Ts-T(2), and the load heat amount ht according to the above ( The arithmetic means is equipped with a second arithmetic circuit ht=qtxΔT (3) which calculates according to equations 1), 2), and the following equation (3), and its operation is as follows.

[For production]

In other words, a bypass path and a small-diameter flowmeter are provided in place of the large-diameter flowmeter in the prior art described above, and the load heat amount qb is calculated by the above equations (1) and (2) in the first arithmetic circuit.
In addition, the second arithmetic circuit is configured so that the load heat amount ht can be determined using the above equations (1), (2), and (3), thereby reducing equipment costs for load detection. Ta.

To explain further, since the bypass path can be made much smaller in diameter than the circulation path, the bypass path flowmeter can be made much cheaper than the large-diameter flowmeter of the prior art described above.

〔Effect of the invention〕

As a result, it has become possible to adjust the amount of heat input and heat released from the heat source device according to the load flow rate and the amount of heat loaded, and it has become possible to provide a heating or cooling device that has excellent operating costs and is also advantageous in terms of equipment costs.

〔Example〕 Next, an example will be shown with reference to FIG.

A heat source device (1) for heating or cooling or air conditioning is formed to supply a heat transfer fluid at a set temperature, and a plurality of indoor heat exchangers (2) are connected to the heat source device (1) to circulate the heat transfer fluid. Road (3
) are connected in parallel.

A bypass path (4) for the indoor heat exchanger (2) is provided across an outgoing portion (3a) and a returning portion (3b) of the circulation path (3), and is formed to have a diameter sufficiently smaller than that of the circulation path (3). A constant flow valve (5) for maintaining the bypass amount of the heat transfer fluid at a set value is provided in the bypass path (4).

A sensor (S) is provided to detect the temperature of the heat transport fluid returning to the heat source device (1), and the return heat transport fluid temperature T is determined by the sensor (S) and the temperature of the indoor heat exchanger (2) is determined by the setting device (6).
), the temperature change setting value ΔTb of the heat transport fluid in the bypass path (4) which is less than 1/1O of the rated temperature difference, and the bypass amount setting value q of the bypass path (4).
b, and a first calculation circuit (7a) that calculates the load flow rate qt using the following equations (1) and (2) based on the supply set temperature Ts of the heat transfer fluid, ΔT=I Ts-T I (2) In addition, the load heat amount ht is calculated using the above equations (1) and (2) and the following (
3) Second calculation circuit (7b) ht=qt that calculates according to formula
xΔT(3) is provided in the calculation means (7).

Based on the load flow rate qt and load heat amount ht from the calculation means (7), a preset program is set for which one of the plurality of heaters and air conditioners installed in parallel in the heat source device (1) is operated. A number controller (8) is provided that automatically determines the number of units, so that it can cope with wide load fluctuations, reliably suppress energy loss, and perform economical operation.

[Another example]

Next, another embodiment will be described.

In place of the above-mentioned constant flow valve (5), a small-diameter flow meter (9) may be provided to detect the amount of heat transfer fluid bypassed in the bypass path (4), as shown in FIG.

In that case, the return heat carrying fluid temperature T by the sensor (S)
1 Bypass amount qb measured by flowmeter (9) and rated temperature difference ΔTh of indoor heat exchanger (2) measured by setting device (6)
and a bypass path (with a temperature difference of 1/10 or less of the rated temperature difference)
A first calculation circuit (10a) that calculates the load flow rate qt using the following equations (1) and (2) based on the temperature change set value ΔTb of the heat transport fluid in step 4) and the supply set temperature Ts of the heat transport fluid. ), ΔT=l Ts-T I (2) and a second calculation circuit (10b) ht= which calculates the load heat 1iht using the above equations (1) and (2) and the following equation (3).
qtxΔT(3) is provided in the calculation means (10).

The type of heat source device (1) can be changed as appropriate; for example, it can be an instantaneous or storage type water heater that uses gas, oil, or electricity as a heat source, a compression type or absorption type heater or air conditioner, or a combination of these. The number of built-in water heaters, space heaters, and air conditioners installed is not critical.

Known control means can be freely selected to configure the heat source device (1) to supply a heat transfer fluid at a set temperature.

The number of indoor heat exchangers (2) installed and the objects to be heated and cooled can be selected as appropriate.

Load flow rate qb and load heat amount ht instead of number controller (8)
A display means may be provided to artificially control the heat source device (1).

The type of sensor (S), the specific structure of the constant flow valve (5), and the model of the flow meter (9) can be selected appropriately, and the calculation means (
The specific configurations of 7) and (10) do not matter.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings by the reference numerals.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention. FIG. 2 is a conceptual diagram showing another embodiment of the present invention. FIG. 3 is a conceptual diagram of a conventional example. (1)...Heat source device, (2)...Indoor heat exchanger, (3)...Circulation path, (3a)...
...Outbound portion, (3b) ...Return portion, (4
)...Bypass path, (5)... Constant flow valve, (6)... Setting device, (7)... Calculating means, (7a) ......first arithmetic circuit, (7b)
...Second arithmetic circuit, (9)...Flowmeter, (10)...Arithmetic means, (10a)...
...First arithmetic circuit, (10b)...Second arithmetic circuit, (S)...Sensor.

Claims (1)

[Claims] 1. An indoor heat exchanger (2) is connected to a heat source device (1) that supplies heat transport fluid at a set temperature via a heat transport fluid circulation path (3), and information from a sensor is A cooling or heating device provided with a calculating means (7) for calculating a load flow rate and a load heat amount based on Outbound portion (3_a) and return portion (3_a)
_b) and its bypass path (4)
a constant flow valve (5) for maintaining the bypass amount of the heat transport fluid at a set value; a sensor (S) for detecting the temperature of the heat transport fluid returning to the heat source device (1) as the sensor; The return heat transport fluid temperature T by (S), the rated temperature difference ΔTh of the indoor heat exchanger (2) by the setting device (6), and the temperature change setting of the heat transport fluid in the bypass path (4). value ΔTb, bypass amount set value qb of the bypass path (4), and supply set temperature T of the heat transport fluid.
s, the first calculation circuit (7_a) calculates the load flow rate qt using the following equations (1) and (2), qt=(ΔTh-ΔTb)/(ΔTh-ΔT)×qb(
1) ΔT=|Ts−T|(2) and a second calculation circuit (7b) ht= which calculates the load heat amount ht using the above equations (1) and (2) and the following equation (3).
qt×ΔT(3) The heating or cooling device is provided with the calculation means (7). 2. Connect an indoor heat exchanger (2) to a heat source device (1) that supplies heat transport fluid at a set temperature via a heat transport fluid circulation path (3), and adjust the load flow rate and load based on information from the sensor. A cooling or heating device provided with a calculation means (7) for calculating the amount of heat, wherein a bypass path (4) for the indoor heat exchanger (2) is an outgoing portion (3a) of the circulation path (3). Return part (3b
), and a sensor (S) for detecting the temperature of the heat transport fluid returning to the heat source device (1) is provided as the sensor, and a flow meter (9) for detecting the bypass amount of the heat transport fluid in the bypass path (4). ), the return heat transfer fluid temperature T determined by the sensor (S), the bypass amount qb determined by the flow meter (9),
Also, the indoor heat exchanger (2) by the setting device (6)
Based on the rated temperature difference ΔTh of ), the first arithmetic circuit (10a) calculates by the formula qt=(ΔTh−ΔTb)/(ΔTh−ΔT)×qb(
1) ΔT=|Ts−T|(2) and a second calculation circuit (10b) ht that calculates the load heat amount ht using the above equations (1) and (2) and the following equation (3).
=qt×ΔT(3) A heating or cooling device in which the calculation means (10) is provided with: